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Subject: Primary Glioblastomas Express Mesenchymal Stem-Like Properties -- Tso et al. 4 (9): 607 -- Molecular Cancer Research
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        =
</TD></TR></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE><FONT=20
size=3D-1><EM>Molecular Cancer Research</EM> 4:607-619 (2006)<BR>=A9 =
2006 <A=20
href=3D"http://mcr.aacrjournals.org/misc/terms.shtml">American =
Association for=20
Cancer Research</A> </FONT><BR>
<H3>
<HR align=3Dleft width=3D"50%" noShade SIZE=3D1>
Cancer Genes and Genomics</H3>
<H2>Primary Glioblastomas Express Mesenchymal Stem-Like Properties=20
</H2><STRONG></NOBR><NOBR>Cho-Lea=20
Tso<SUP>1</SUP><SUP>,2</SUP><SUP>,6</SUP></NOBR>, <NOBR>Peter=20
Shintaku<SUP>3</SUP><SUP>,6</SUP></NOBR>, <NOBR>James =
Chen<SUP>1</SUP></NOBR>,=20
<NOBR>Qinghai Liu<SUP>2</SUP></NOBR>, <NOBR>Jason =
Liu<SUP>1</SUP></NOBR>,=20
<NOBR>Zugen Chen<SUP>1</SUP></NOBR>, <NOBR>Koji =
Yoshimoto<SUP>3</SUP></NOBR>,=20
<NOBR>Paul S. Mischel<SUP>3</SUP><SUP>,6</SUP></NOBR>, <NOBR>Timothy F.=20
Cloughesy<SUP>4</SUP><SUP>,6</SUP></NOBR>, <NOBR>Linda M.=20
Liau<SUP>5</SUP><SUP>,6</SUP></NOBR> and <NOBR>Stanley F.=20
Nelson<SUP>1</SUP><SUP>,6</SUP></NOBR> </STRONG>
<P><FONT size=3D-1><EM>Departments of <SUP>1</SUP> Human Genetics, =
<SUP>2</SUP>=20
Medicine/Hematology-Oncology, <SUP>3</SUP> Pathology and Laboratory =
Medicine,=20
<SUP>4</SUP> Neurology, and <SUP>5</SUP> Neurosurgery, David Geffen =
School of=20
Medicine and <SUP>6</SUP> Jonsson Comprehensive Cancer Center, =
University of=20
California Los Angeles, Los Angeles, California </EM></FONT>
<P><FONT size=3D-1><STRONG>Requests for reprints:</STRONG> Stanley F. =
Nelson,=20
Department of Human Genetics, David Geffen School of Medicine, =
University of=20
California at Los Angeles, Room 5506, 695 Young Drive South, Los =
Angeles, CA=20
90095. Phone: 310-794-7981. E-mail: <SPAN =
id=3Dem0>snelson{at}ucla.edu</SPAN>
<SCRIPT type=3Dtext/javascript><!--=0A=
 var u =3D "snelson", d =3D "ucla.edu"; =
document.getElementById("em0").innerHTML =3D '<a href=3D"mailto:' + u + =
'@' + d + '">' + u + '@' + d + '<\/a>'//--></SCRIPT>
</FONT>
<P>
<P><A name=3DABS><!-- null --></A><BR clear=3Dright>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"100%" bgColor=3D#e1e1e1>
  <TBODY>
  <TR>
    <TD vAlign=3Dcenter align=3Dleft width=3D"5%" bgColor=3D#ffffff><IMG =
height=3D21=20
      alt=3D" " hspace=3D5 =
src=3D"http://mcr.aacrjournals.org/icons/toc/rarrow.gif"=20
      width=3D10></TD>
    <TH vAlign=3Dcenter align=3Dleft width=3D"95%"><FONT =
size=3D+2>&nbsp;&nbsp;=20
      Abstract </FONT></TH></TR></TBODY></TABLE>
<TABLE cellPadding=3D5 align=3Dright border=3D1>
  <TBODY>
  <TR>
    <TH align=3Dleft><FONT size=3D-1><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#top"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Top<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FN"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Notes<BR></A><IMG height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/dot.gif" width=3D11=20
      border=3D0><FONT color=3D#464c53>Abstract</FONT><BR><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC1"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Introduction<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC2"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Results<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC3"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Discussion<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC4"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Materials and Methods<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#ACK"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Acknowledgements<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIBL"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      =
border=3D0>References<BR></A></FONT></TH></TR></TBODY></TABLE>&nbsp;<BR>G=
lioblastoma=20
is the most common and aggressive primary brain<SUP> </SUP>cancer. =
Recent=20
isolation and characterization of brain tumor-initiating<SUP> =
</SUP>cells=20
supports the concept that transformed neural stem cells<SUP> </SUP>may =
seed=20
glioblastoma. We previously identified a wide array<SUP> </SUP>of =
mesenchymal=20
tissue transcripts overexpressed in a broad set<SUP> </SUP>of primary=20
glioblastoma (<I>de novo</I>) tumors but not in secondary<SUP>=20
</SUP>glioblastoma (derived from lower-grade) tumors, low-grade=20
astrocytomas,<SUP> </SUP>or normal brain tissues. Here, we extend this=20
observation and<SUP> </SUP>show that a subset of primary glioblastoma =
tumors and=20
their<SUP> </SUP>derived tumor lines express cellular and molecular =
markers=20
that<SUP> </SUP>are associated with mesenchymal stem cells (MSC) and =
that=20
glioblastoma<SUP> </SUP>cell cultures can be induced to differentiate =
into=20
multiple<SUP> </SUP>mesenchymal lineage-like cell types. These findings=20
suggest<SUP> </SUP>either that a subset of primary glioblastomas derive =
from=20
transformed<SUP> </SUP>stem cells containing MSC-like properties and =
retain=20
partial<SUP> </SUP>phenotypic aspects of a MSC nature in tumors or that=20
glioblastomas<SUP> </SUP>activate a series of genes that result in =
mesenchymal=20
properties<SUP> </SUP>of the cancer cells to effect sustained tumor =
growth and=20
malignant<SUP> </SUP>progression. (Mol Cancer Res =
2006;4(9):607=9619)<SUP> </SUP>
<P><A name=3DSEC1><!-- null --></A><BR clear=3Dright>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"100%" bgColor=3D#e1e1e1>
  <TBODY>
  <TR>
    <TD vAlign=3Dcenter align=3Dleft width=3D"5%" bgColor=3D#ffffff><IMG =
height=3D21=20
      alt=3D" " hspace=3D5 =
src=3D"http://mcr.aacrjournals.org/icons/toc/rarrow.gif"=20
      width=3D10></TD>
    <TH vAlign=3Dcenter align=3Dleft width=3D"95%"><FONT =
size=3D+2>&nbsp;&nbsp;=20
      Introduction </FONT></TH></TR></TBODY></TABLE>
<TABLE cellPadding=3D5 align=3Dright border=3D1>
  <TBODY>
  <TR>
    <TH align=3Dleft><FONT size=3D-1><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#top"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Top<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FN"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Notes<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#ABS"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Abstract<BR></A><IMG height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/dot.gif" width=3D11=20
      border=3D0><FONT color=3D#464c53>Introduction</FONT><BR><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC2"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Results<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC3"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Discussion<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC4"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Materials and Methods<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#ACK"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Acknowledgements<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIBL"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      =
border=3D0>References<BR></A></FONT></TH></TR></TBODY></TABLE>&nbsp;<BR>G=
lioblastoma=20
(WHO, grade IV) is the most common and aggressive<SUP> </SUP>form of =
adult brain=20
tumor (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB1">1</A>)=
 and can=20
derive either <I>de novo</I><SUP> </SUP>with no prior evidence of a =
lower-grade=20
tumor, called primary<SUP> </SUP>glioblastoma, or through malignant =
progression=20
from a lower-grade<SUP> </SUP>malignancy, called secondary glioblastoma. =
Genetic=20
studies suggest<SUP> </SUP>that primary and secondary glioblastomas are =
two=20
distinct clinical<SUP> </SUP>entities, each developing along distinct =
genetic=20
pathways with<SUP> </SUP>characteristic genomic losses. Whereas =
secondary=20
glioblastomas<SUP> </SUP>clearly develop slowly from within lower-grade=20
astrocytoma and<SUP> </SUP>frequently contain mutations in the =
<I>p53</I> gene=20
(<IMG alt=3D~ src=3D"http://mcr.aacrjournals.org/math/sim.gif" =
border=3D0>60%),=20
primary<SUP> </SUP>glioblastomas develop rapidly and in general are =
thought=20
to<SUP> </SUP>arise from astrocytic precursors and are genetically=20
characterized<SUP> </SUP>by amplification and/or overexpression of =
epidermal=20
growth factor<SUP> </SUP>receptor (EGFR; <IMG alt=3D~=20
src=3D"http://mcr.aacrjournals.org/math/sim.gif" border=3D0>60%; refs. =
<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB1">1</A>-=
<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB3">3</A>)=
. The=20
cell of origin of glioblastomas<SUP> </SUP>has been recently considered =
to be of=20
the neural stem cell (NSC)<SUP> </SUP>lineage and this concept is =
supported by=20
the recent experimental<SUP> </SUP>data generated from multiple =
laboratories=20
showing that only<SUP> </SUP>CD133<SUP>+</SUP> (a cell surface marker of =
normal=20
human NSC) but not CD133<SUP>=96</SUP><SUP> </SUP>cells isolated from =
glioblastoma=20
tumors contain tumor-initiating<SUP> </SUP>cells (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB4">4</A>-=
<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB7">7</A>)=
.=20
Additionally, these cells are multipotent in culture<SUP> </SUP>and can =
be=20
induced to differentiate into neuronal, astroglial,<SUP> </SUP>or=20
oligodendroglial cells. Therefore, glioblastoma may be a<SUP> </SUP>NSC =
disorder=20
or transformed cells reactivate NSC properties<SUP> </SUP>(<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB8">8</A>,=
 <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB9">9</A>)=
. For=20
many years, it has been appreciated that, during<SUP> </SUP><I>in =
vitro</I>=20
cultivation, glioblastoma cells can express a variety<SUP> </SUP>of=20
heterogeneous markers, including multiple mesenchymal markers,<SUP> =
</SUP>and=20
were generally thought to be due to mesenchymal drift or<SUP> =
</SUP>cultures are=20
overgrown by mesenchymal cells from the abnormal<SUP> </SUP>vascular=20
proliferations of the original glioma (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB10">10</A=
>, <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB11">11</A=
>).=20
Subsequently,<SUP> </SUP>a study showing that permanent glioblastoma =
cell lines=20
formed<SUP> </SUP>tumors in nude mice failed to sustain evidence of =
glial=20
differentiation<SUP> </SUP>but exhibited the characteristics of =
mesenchymal=20
differentiation<SUP> </SUP>both <I>in vitro</I> and <I>in vivo</I> (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB12">12</A=
>).=20
Correspondingly, our recent<SUP> </SUP>study using whole genome gene =
expression=20
analyses of 85 high-grade<SUP> </SUP>glial tumors also identified a =
subset of=20
glioblastoma tumors<SUP> </SUP>overexpressing transcripts of =
extracellular=20
matrix (ECM) components,<SUP> </SUP>which correlates with a set of genes =

typically expressed in<SUP> </SUP>mesenchyme-derived tissues (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB13">13</A=
>).=20
Follow-up studies further identified<SUP> </SUP>that a series of=20
mesenchymal-associated transcripts that partially<SUP> </SUP>overlapped =
with=20
previous study are only overexpressed in a subset<SUP> </SUP>of primary=20
glioblastomas but not in secondary glioblastoma,<SUP> </SUP>low-grade=20
astrocytoma, or normal brain (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB14">14</A=
>). These=20
observations<SUP> </SUP>thus support the possibility of a fundamentally =
distinct=20
mechanism<SUP> </SUP>of oncogenesis and progression in at least a subset =
of=20
primary<SUP> </SUP>glioblastomas.<SUP> </SUP>
<P>Recent studies suggest that stem cell plasticity is a =
characteristic<SUP>=20
</SUP>of NSC and that the differentiation of NSC into unanticipated<SUP> =

</SUP>cell types, including hematopoietic, muscle, and endothelial<SUP>=20
</SUP>cells (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB15">15</A=
>-<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB17">17</A=
>), has=20
been shown. Likewise, mesenchymal stem cells<SUP> </SUP>(MSC), which can =
give=20
rise to various cell types of mesenchymal<SUP> </SUP>tissues, such as =
bone,=20
cartilage, adipose, and muscle (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB18">18</A=
>),<SUP>=20
</SUP>could differentiate into astrocytes and neurons (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB19">19</A=
>, <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB20">20</A=
>).=20
A<SUP> </SUP>microarray analysis of a single MSC further explored a =
panel<SUP>=20
</SUP>of lineage-related transcripts associated with osteoblast,=20
fibroblast,<SUP> </SUP>muscle, adipocyte, epithelial cells, endothelial =
cells,=20
and<SUP> </SUP>neural/glial cells (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB21">21</A=
>-<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB25">25</A=
>).=20
Recently, transcription profiling<SUP> </SUP>has uncovered an =
overlapping=20
genetic program in various types<SUP> </SUP>of stem cells (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB26">26</A=
>) and=20
therefore supports the concept that somatic<SUP> </SUP>stem cells have a =
broad=20
differentiation repertoire. In the present<SUP> </SUP>study, we show =
that=20
primary glioblastoma tumors and their passaged<SUP> </SUP>tumor cell =
lines=20
express cellular and molecular characteristics<SUP> </SUP>of MSC. =
Further, when=20
treated with adipogenic, osteogenic, or<SUP> </SUP>chondrogenic =
induction=20
medium, primary glioblastoma cell lines<SUP> </SUP>are capable of=20
differentiating into mesenchymal lineage cell<SUP> </SUP>types, thus =
implying=20
that a subset of primary glioblastomas<SUP> </SUP>may use mesenchymal =
properties=20
to attain their malignant phenotype.<SUP> </SUP>
<P><A name=3DSEC2><!-- null --></A><BR clear=3Dright>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"100%" bgColor=3D#e1e1e1>
  <TBODY>
  <TR>
    <TD vAlign=3Dcenter align=3Dleft width=3D"5%" bgColor=3D#ffffff><IMG =
height=3D21=20
      alt=3D" " hspace=3D5 =
src=3D"http://mcr.aacrjournals.org/icons/toc/rarrow.gif"=20
      width=3D10></TD>
    <TH vAlign=3Dcenter align=3Dleft width=3D"95%"><FONT =
size=3D+2>&nbsp;&nbsp;=20
      Results </FONT></TH></TR></TBODY></TABLE>
<TABLE cellPadding=3D5 align=3Dright border=3D1>
  <TBODY>
  <TR>
    <TH align=3Dleft><FONT size=3D-1><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#top"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Top<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FN"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Notes<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#ABS"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Abstract<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC1"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Introduction<BR></A><IMG height=3D9 alt=3D" " =
hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/dot.gif" width=3D11=20
      border=3D0><FONT color=3D#464c53>Results</FONT><BR><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC3"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Discussion<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC4"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Materials and Methods<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#ACK"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Acknowledgements<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIBL"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      =
border=3D0>References<BR></A></FONT></TH></TR></TBODY></TABLE>&nbsp;<BR><=
EM>Primary=20
Glioblastoma Biopsies Express Mesenchymal and NSC-Associated =
Genes</EM><BR>To=20
identify gain-of-function genes associated with acquisition<SUP> =
</SUP>of=20
malignant features of glioblastoma, we did a large-scale<SUP> </SUP>DNA=20
microarray analysis of 101 glial brain tumors (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB14">14</A=
>).=20
Through<SUP> </SUP>a series of comparative analyses relative to =
lower-grade=20
astrocytomas,<SUP> </SUP>we have identified a list of primary=20
glioblastoma-associated<SUP> </SUP>genes that are distinct from being =
identified=20
in progression<SUP> </SUP>from a lower grade (secondary glioblastoma). A =
series=20
of genes<SUP> </SUP>that are highly expressed in mesenchymal tissues but =
not=20
in<SUP> </SUP>neural or glial cells were identified, including bone,=20
cartilage,<SUP> </SUP>tendon, ligament, fat, and muscle (e.g., =
<I>YKL-40, lysyl=20
oxidase,<SUP> </SUP>PDPN, collagen type V</I> and <I>VI, biglycan, =
mesenchyme=20
homeobox<SUP> </SUP>2, fatty acid=96binding protein, CA3</I>, and =
<I>tangelin</I>;=20
ref.<SUP> </SUP><A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB14">14</A=
>). To=20
access and capture genes that are potentially associated<SUP> </SUP>with =

cellular properties and tumorigenesis of primary glioblastoma,<SUP> =
</SUP>a=20
comparative analysis of primary glioblastoma (<I>n</I> =3D 46) =
relative<SUP>=20
</SUP>to normal brain tissue (<I>n</I> =3D 10) was done. Probe set =
signals<SUP>=20
</SUP>on the U133A array that were <IMG alt=3D&#8805;=20
src=3D"http://mcr.aacrjournals.org/math/ge.gif" border=3D0>2.5-fold in =
primary=20
glioblastoma<SUP> </SUP>versus the normal brain tissue with a pairwise =
<I>t</I>=20
test with a<SUP> </SUP><I>P</I> &lt; 0.05 were selected and the top 100 =
genes=20
were presented<SUP> </SUP>in <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#TBL1">Table =
1</A>=20
(see Supplementary Table S1 for more detailed description).<SUP> =
</SUP>As=20
anticipated, genes that were identified previously as primary<SUP>=20
</SUP>glioblastoma progression-associated genes reappeared in this<SUP>=20
</SUP>gene list, which reflected the status of inflammation, =
coagulation,<SUP>=20
</SUP>immune/complement responses, angiogenesis, and ECM remodeling<SUP> =

</SUP>(<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB14">14</A=
>),=20
whereas a new series of genes that are associated with<SUP> </SUP>MSC, =
MSC=20
differentiation, skeletal/cartilage development, morphogenesis,<SUP>=20
</SUP>organogenesis, and embryonic neuroepithelial stem cells =
(dChip<SUP>=20
</SUP>gene information) were identified (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#TBL1">Table =
1</A>;=20
refs. <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB21">21</A=
>-<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB25">25</A=
>).=20
Particularly,<SUP> </SUP>several mesenchyme-specific genes, normally =
associated=20
with<SUP> </SUP>osteoblasts and osteoblastic differentiation, are highly =

expressed,<SUP> </SUP>including <I>POSTN</I> (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB27">27</A=
>),=20
<I>TNC</I> (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB28">28</A=
>, <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB29">29</A=
>),=20
<I>SPARC/osteonectin</I> (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB30">30</A=
>),<SUP>=20
</SUP><I>collagen type I/III</I> (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB31">31</A=
>),=20
<I>CTGF</I> (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB32">32</A=
>),=20
<I>ANXA2</I> (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB33">33</A=
>),=20
<I>IGFBP3/IGFBP5</I><SUP> </SUP>(<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB34">34</A=
>, <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB35">35</A=
>),=20
<I>osteoactivin</I> (<I>GPNMB</I>; ref. <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB36">36</A=
>),=20
<I>CSPG2</I> (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB28">28</A=
>), and=20
<I>TAZ</I><SUP> </SUP>(<I>WWTR1</I>; ref. <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB37">37</A=
>). The=20
coexpression of TNC, SPARC, collagens,<SUP> </SUP>osteoactivin, and ANX2 =

suggests the presence of a molecular<SUP> </SUP>program of=20
epithelial-mesenchymal transition (EMT), which is<SUP> </SUP>frequently =
seen in=20
malignant tumor with a highly invasive phenotype<SUP> </SUP>(<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB38">38</A=
>-<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB40">40</A=
>). TAZ=20
was recently identified as a transcriptional modulator<SUP> </SUP>of MSC =

differentiation that promotes the development of the<SUP> =
</SUP>osteoblastic=20
component and represses peroxisome proliferator-activated<SUP>=20
</SUP>receptor-<IMG alt=3D{gamma} =
src=3D"http://mcr.aacrjournals.org/math/gamma.gif"=20
border=3D0>=96dependent adipogenesis (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB37">37</A=
>).=20
Moreover, myostatin<SUP> </SUP>(GDF8), IGFBP3/IGFBP5, and ID3 also have =
been=20
suggested to play<SUP> </SUP>a role in the suppression of myogenesis and =

adipogenesis (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB41">41</A=
>-<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB45">45</A=
>).<SUP>=20
</SUP>Simultaneously, several NSC-associated genes were =
overexpressed<SUP>=20
</SUP>in primary glioblastoma tumors, including <I>NES, SOX2, SOX4, =
SOX11,<SUP>=20
</SUP>CXCR</I>, and <I>DLL3</I>. The overexpression of <I>NES</I> =
transcript=20
reflected<SUP> </SUP>the characteristic of neuroepithelial tumor cells.=20
<I>SOX2</I> is expressed<SUP> </SUP>in embryonic neural epithelial stem =
cells=20
(<A =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB46">46</A=
>)=20
and is essential<SUP> </SUP>to maintain pluripotent, self-renewal, and=20
undifferentiated<SUP> </SUP>phenotypes of embryonic stem cells (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB47">47</A=
>).=20
<I>SOX4</I> and <I>SOX11</I> play<SUP> </SUP>a role in central nervous =
system=20
development (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB48">48</A=
>), and=20
<I>SOX4</I><SUP> </SUP>gene recently was characterized as a component of =
the=20
parathyroid<SUP> </SUP>hormone signal transduction pathway in =
osteoblastic cells=20
and<SUP> </SUP>has an important function in bone formation (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB49">49</A=
>). The=20
chemokine<SUP> </SUP>receptor <I>CXCR4</I> has been regarded as a MSC =
and NSC=20
receptor that<SUP> </SUP>mediates MSC-specific migration to bone marrow =
and NSC=20
migration<SUP> </SUP>to injury sites in the central nervous system (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB50">50</A=
>, <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB51">51</A=
>).=20
CXCR4-stromal<SUP> </SUP>cell-derived factor-1 pathway was suggested to =
play an=20
important<SUP> </SUP>role in promoting glioma survival, proliferation, =
and=20
migration<SUP> </SUP>(<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB52">52</A=
>, <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB53">53</A=
>).=20
<I>DLL3</I> has been shown to function as an inhibitor of<SUP> =
</SUP>Notch=20
signaling that inhibited glial differentiation of mouse<SUP> =
</SUP>neural=20
progenitors (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB54">54</A=
>). The=20
distinctive gene expression profile<SUP> </SUP>in a set of glioblastoma =
and=20
normal brain tissue samples was<SUP> </SUP>verified previously by a =
real-time=20
quantitative reverse transcription-PCR<SUP> </SUP>(RT-PCR) analysis (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB14">14</A=
>). This=20
transcription profile of primary<SUP> </SUP>glioblastoma is therefore =
indicative=20
of NSC- and MSC-like properties<SUP> </SUP>in glioblastoma tumors.<SUP> =
</SUP>
<P><A name=3DTBL1><!-- null --></A><BR clear=3Dall>
<CENTER>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"95%">
  <TBODY>
  <TR bgColor=3D#e1e1e1>
    <TD>
      <TABLE cellSpacing=3D2 cellPadding=3D2>
        <TBODY>
        <TR bgColor=3D#e1e1e1>
          <TD vAlign=3Dtop align=3Dmiddle bgColor=3D#ffffff><STRONG>View =
this=20
            table:</STRONG><BR><NOBR><A=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607/TBL1">[in=20
            this window]</A><BR><A=20
            onmouseover=3D"window.status=3D'View table in a separate =
window'; return true"=20
            onclick=3D"startTarget('TBL1', 500, 400); =
this.href=3D'/cgi/content-nw/full/4/9/607/TBL1'"=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content-nw/full/4/9/607/TBL1"=20
            target=3DTBL1>[in a new window]</A><BR>&nbsp;</NOBR> </TD>
          <TD vAlign=3Dtop align=3Dleft><B>Table 1.</B> Top 100 Primary=20
            Glioblastoma-Associated Genes Expressed at Higher Levels =
Compared=20
            with Normal Brain Tissue
            =
<P></P></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></CENTER>&nbsp=
;<BR>It=20
is possible that the mesenchymal gene expression detected<SUP> </SUP>was =

reflecting a mixture of normal stromal cells within the<SUP> =
</SUP>tumor. To=20
assess this possibility, a tissue microarray consisting<SUP> </SUP>of =
tumor=20
cores and matching normal brain counterparts from 60<SUP> </SUP>primary=20
glioblastomas and 16 secondary glioblastomas was constructed<SUP> =
</SUP>to allow=20
visualization of cancer cells distinct from the supporting<SUP> =
</SUP>normal=20
tissue. The detection of YKL-40/cartilage glycoprotein-39<SUP>=20
</SUP>(cartilage/chondrocyte-associated gene) overexpressed in =
clinically<SUP>=20
</SUP>defined primary glioblastoma cells but not in secondary =
glioblastoma<SUP>=20
</SUP>cells was published previously (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB14">14</A=
>). Here,=20
we have further tested<SUP> </SUP>two other MSC-associated markers, TNC=20
(myelosupportive stromal-associated<SUP> </SUP>gene) and =
SPARC/osteonectin=20
(skeletal development-associated<SUP> </SUP>gene), which were identified =

previously in glioblastoma tumors.<SUP> </SUP>Our results showed that =
both=20
markers were overexpressed in the<SUP> </SUP>primary glioblastoma =
samples, and=20
the incidence as well as expression<SUP> </SUP>level were significantly =
higher=20
in primary glioblastoma than<SUP> </SUP>in secondary glioblastoma and =
normal=20
brain (<A =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FIG1">Fig.=20
1</A> ). Although<SUP> </SUP>TNC and osteonectin are expressed in =
glioblastoma=20
tumors, our<SUP> </SUP>analysis pointed out that TNC and osteonectin are =

significantly<SUP> </SUP>overexpressed in primary glioblastoma =
(mesenchymal=20
phenotype)<SUP> </SUP>compared with secondary glioblastoma =
(proliferation/cell=20
cycle<SUP> </SUP>phenotype). The mesenchymal gene expression was =
detected=20
broadly<SUP> </SUP>throughout the population of malignant cells and ECM=20
showing<SUP> </SUP>cellular atypia.<SUP> </SUP>
<P><A name=3DFIG1><!-- null --></A><BR clear=3Dall>
<CENTER>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"95%">
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        <TR bgColor=3D#e1e1e1>
          <TD vAlign=3Dtop align=3Dmiddle bgColor=3D#ffffff><A=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607/FIG1"><IMG=20
            height=3D102 alt=3D"Figure 1" hspace=3D10=20
            =
src=3D"http://mcr.aacrjournals.org/content/vol4/issue9/images/small/607fi=
g01c.gif"=20
            width=3D200 vspace=3D5 border=3D2></A><BR><STRONG>View =
larger=20
            version</STRONG> (42K):<BR><NOBR><A=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607/FIG1">[in=20
            this window]</A><BR><A=20
            onmouseover=3D"window.status=3D'View figure in a separate =
window'; return true"=20
            onclick=3D"startTarget('FIG1', 590, 424); =
this.href=3D'/cgi/content-nw/full/4/9/607/FIG1'"=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content-nw/full/4/9/607/FIG1"=20
            target=3DFIG1>[in a new window]</A><BR>&nbsp;</NOBR> </TD>
          <TD vAlign=3Dtop align=3Dleft><B>FIGURE 1.</B> Primary =
glioblastoma=20
            tumors express mesenchymal phenotype. Representative=20
            immunohistochemical staining of TNC and osteonectin in =
clinical=20
            glioblastoma (<I>GBM</I>) subgroups and normal brain. =
Subsets of the=20
            images from a tissue array. Each core is 0.06 mm across. =
Strong=20
            positivity of TNC and osteonectin staining was detected in =
two=20
            primary glioblastoma. Negative/weak staining was detected in =
two=20
            secondary glioblastoma and two normal brain cores. The =
incidence of=20
            the expressions of two markers was significantly higher in =
primary=20
            glioblastoma compared with secondary glioblastoma and normal =
brain=20
            tissue, and the average intensity of staining in positive =
samples=20
            was higher in primary glioblastoma when compared with =
secondary=20
            glioblastoma and normal brain cores. Staining intensity was =
scored=20
            on a scale of 0 to 2 as described in Materials and Methods.=20
            Magnification, <FONT face=3Darial,helvetica>x</FONT>400.
            =
<P></P></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></CENTER>&nbsp=
;<BR><EM>Primary=20
Glioblastoma Biopsy-Derived Tumor Lines Express Molecular Signatures of=20
MSC</EM><BR>To examine whether MSC and mesenchymal lineage cell=20
type=96associated<SUP> </SUP>transcripts detected in primary =
glioblastoma biopsies=20
are expressed<SUP> </SUP>in glioblastoma-derived cells, four permanent=20
glioblastoma biopsy-derived<SUP> </SUP>glioblastoma cell lines (W-98, =
D-431,=20
F-502, and S-496) were<SUP> </SUP>selected for molecular =
characterization. To=20
rule out the possibility<SUP> </SUP>that glioblastoma cell lines are =
stromal=20
cells derived from<SUP> </SUP>angiogenic tumors, we determined the =
genomic and=20
molecular identities<SUP> </SUP>of cell lines. All four cell lines carry =

chromosomal abnormalities<SUP> </SUP>commonly detected in glioblastomas =
using a=20
high-density single<SUP> </SUP>nucleotide polymorphism array analysis =
(<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FIG2">Fig. =
2A</A> ).=20
Notably,<SUP> </SUP>D-431 and F-502 exhibit loss of heterozygosity (LOH) =
in=20
chromosome<SUP> </SUP>10 but not in chromosome 17, whereas W-98 and =
S-496=20
exhibit<SUP> </SUP>LOH in both chromosomes. Additionally, amplification =
of=20
chromosome<SUP> </SUP>7 was detected in D-431, F-502, and, lesser =
degree, S-496.=20
Frequent<SUP> </SUP>LOH for chromosome 10 and gain of chromosome 7 have =
been=20
linked<SUP> </SUP>to mesenchymal glioblastoma subtype (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB55">55</A=
>, <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB56">56</A=
>). To=20
further verify<SUP> </SUP>the glioblastoma origin of tumor lines,=20
immunocytochemical staining<SUP> </SUP>of YKL-40 and NES was done. =
Homogeneous=20
coexpression of NES<SUP> </SUP>and YKL-40 in glioblastoma cells was =
shown in all=20
glioblastoma<SUP> </SUP>cell lines (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FIG2">Fig. =
2B</A>).=20
Transcripts of YKL-40 and NES were also<SUP> </SUP>detected in =
glioblastoma cell=20
lines using semiquantitative RT-PCR<SUP> </SUP>amplification (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FIG2">Fig. =
2C and=20
D</A>). Notably, glioblastoma cell lines<SUP> </SUP>overexpress EGFR, =
vascular=20
endothelial growth factor, and insulin-like<SUP> </SUP>growth factor-I =
receptor=20
as other types of tested human cancer<SUP> </SUP>cell lines, yet YKL-40 =
was only=20
detected in glioblastoma cell<SUP> </SUP>lines among the tested cancer =
cell=20
lines, suggesting the mesenchymal<SUP> </SUP>origin of glioblastoma (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FIG2">Fig. =
2C</A>).=20
To test whether mesenchymal<SUP> </SUP>tissue- and MSC-associated genes=20
identified in glioblastoma<SUP> </SUP>tumors (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#TBL1">Table =
1</A>)=20
are indeed expressed in glioblastoma cell lines,<SUP> </SUP>glioblastoma =
cell=20
lines were subjected to RT-PCR analysis. The<SUP> </SUP>results =
indicated that=20
glioblastoma cell lines simultaneously<SUP> </SUP>express a host of =
transcripts=20
typically expressed in mature<SUP> </SUP>mesenchymal lineage cell types =
(<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FIG2">Fig. =
2D</A>),=20
including bone (collagen<SUP> </SUP>type I, III, and V, CTGF, and =
SPARC),=20
cartilage/ligament/tendon<SUP> </SUP>(CHI3L1/YKL-40, collagen type IV =
and VI,=20
and lysyl oxidase),<SUP> </SUP>muscle/adipose (transgelin and CA3),=20
myelosupportive stromal<SUP> </SUP>tissue (PBEF1 and TNC), and=20
endothelial/epithelial cells (IL8,<SUP> </SUP>MMP9, EGFR, and VEGF).=20
Concurrently, transcripts of undifferentiated<SUP> </SUP>NSC, NES, and =
vimentin,=20
were also detected in all glioblastoma<SUP> </SUP>cell lines. A weak =
signal of=20
glial fibrillary acidic protein<SUP> </SUP>can only be detected in F-509 =
using=20
higher number of PCR cycles<SUP> </SUP>(40 cycles; data not shown). =
Three of the=20
four glioblastoma<SUP> </SUP>cell lines, derived from clinically defined =
primary=20
glioblastomas,<SUP> </SUP>had similar transcription profiles. Notably, =
S-496,=20
derived<SUP> </SUP>from a clinically defined secondary glioblastoma, had =

lower<SUP> </SUP>expression levels of several mesenchymal =
tissue-associated=20
genes.<SUP> </SUP>U87-MG, a commonly studied glioblastoma cell line, =
also=20
exhibited<SUP> </SUP>mesenchymal expression characteristics similar to =
those of=20
the<SUP> </SUP>primary glioblastoma samples, whereas several of the =
genes=20
tested<SUP> </SUP>for expression were barely detectable in fibroblast =
cells=20
or<SUP> </SUP>peripheral blood lymphocytes. To verify that glioblastoma=20
subtypes<SUP> </SUP>express a differential level of MSC-associated =
transcript,=20
a<SUP> </SUP>real-time quantitative RT-PCR analysis of YKL-40 =
expression<SUP>=20
</SUP>was done. A higher expression level of YKL-40 transcript was<SUP>=20
</SUP>detected in both primary glioblastoma tumors and cell lines<SUP>=20
</SUP>(W-98, D-431, and F-502) compared with secondary glioblastoma<SUP> =

</SUP>tumors, secondary glioblastoma cell line (S-495), and normal<SUP>=20
</SUP>brain tissue. YKL-40 transcript was not detectable in both=20
fibroblasts<SUP> </SUP>and peripheral blood lymphocytes.<SUP> </SUP>
<P><A name=3DFIG2><!-- null --></A><BR clear=3Dall>
<CENTER>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"95%">
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          <TD vAlign=3Dtop align=3Dmiddle bgColor=3D#ffffff><A=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607/FIG2"><IMG=20
            height=3D200 alt=3D"Figure 2" hspace=3D10=20
            =
src=3D"http://mcr.aacrjournals.org/content/vol4/issue9/images/small/607fi=
g02c.gif"=20
            width=3D178 vspace=3D5 border=3D2></A><BR><STRONG>View =
larger=20
            version</STRONG> (53K):<BR><NOBR><A=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607/FIG2">[in=20
            this window]</A><BR><A=20
            onmouseover=3D"window.status=3D'View figure in a separate =
window'; return true"=20
            onclick=3D"startTarget('FIG2', 541, 640); =
this.href=3D'/cgi/content-nw/full/4/9/607/FIG2'"=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content-nw/full/4/9/607/FIG2"=20
            target=3DFIG2>[in a new window]</A><BR>&nbsp;</NOBR> </TD>
          <TD vAlign=3Dtop align=3Dleft><B>FIGURE 2.</B> Glioblastoma=20
            biopsy-derived glioblastoma cell lines express genomic, =
cellular,=20
            and molecular properties indicative of mesenchymal =
phenotype.=20
            <B>A.</B> Genomic abnormalities that are associated with =
mesenchymal=20
            phenotype of glioblastoma were detected in glioblastoma cell =
lines.=20
            Whole genomic DNA of glioblastoma cell lines (W-98, D-431, =
F-502,=20
            and S-496) and the fibroblast cell line were evaluated for =
allelic=20
            imbalances and chromosomal copy number abnormalities by =
using a=20
            high-density single nucleotide polymorphism array analysis=20
            (Affymetrix <I>Xba</I>I 131 Array). X axis, length of =
chromosomes=20
            17, 10, and 7; Y axis, score of the evidence of LOH on =
chromosome 10=20
            or 17 or gain of gene copy number on chromosome 7. D-431 and =
F-502=20
            exhibit LOH on chromosome 10 accompanied by gain of genes =
copy=20
            number on chromosome 7, whereas W-98 and S-496 exhibit LOH =
on=20
            chromosomes 10 and 17 and lesser degree of gain of =
chromosome 7.=20
            Fibroblast cell line had no evidence of genomic =
abnormalities.=20
            <B>B.</B> Coexpression of neural and mesenchymal-associated =
gene in=20
            glioblastoma cell lines. Expression of NES and YKL-40 was =
determined=20
            using immunocytochemical analysis. Rat chondrosarcoma cell =
lines=20
            served as positive control cells for YKL-40. Representative =
of four=20
            glioblastoma cell lines. Magnification, <FONT=20
            face=3Darial,helvetica>x</FONT>100. <B>C.</B> Specific =
expression of=20
            YKL-40 in glioblastoma cell lines. Semiquantitative RT-PCR =
analysis=20
            was done to determine the expression of YKL-40, EGFR, =
insulin-like=20
            growth factor-I receptor (<I>IGFR</I>), and vascular =
endothelial=20
            growth factor (<I>VEGF</I>) in various types of human cancer =
cell=20
            lines. Overexpression of EGFR, vascular endothelial growth =
factor,=20
            and insulin-like growth factor-I receptor was detected in =
all tested=20
            human cancer cell lines, whereas only glioblastoma cell =
lines=20
            uniquely express YKL-40 in the same culture condition (10% =
serum),=20
            indicative of mesenchymal origin. <B>D.</B> Glioblastoma =
cell lines=20
            express multiple MSC-associated genes. Semiquantitative =
RT-PCR=20
            analysis was done to verify that MSC-associated genes =
identified in=20
            primary glioblastoma tumors (<A=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#TBL1">Table =

            1</A>) are expressed in glioblastoma cell lines. Transcripts =
of=20
            multiple cell lineages in glioblastoma cell lines (W-98, =
D-431,=20
            F-502, U87-MG, and S-496), normal newborn foreskin =
fibroblasts, and=20
            peripheral blood lymphocytes (<I>PBL</I>) were analyzed. PCR =

            products were grouped based on the tissue lineage. All=20
            determinations were done in duplicates. The full name of =
each=20
            labeled gene symbol is described in <A=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#TBL1">Table =

            1</A>. <B>E.</B> Differential expression of mesenchymal=20
            lineage-associated gene in glioblastoma subtypes. Real-time=20
            quantitative RT-PCR analysis of YKL-40 in glioblastoma tumor =

            subtypes, normal brain tissues, glioblastoma cell lines, =
normal=20
            fibroblast, and freshly peripheral blood lymphocytes was =
done. The=20
            quantitation of specific transcript in samples was =
calculated and=20
            expressed by the YKL-40 mRNA ratio to =
glyceraldehyde-3-phosphate=20
            dehydrogenase (<I>GAPDH</I>).
            =
<P></P></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></CENTER>&nbsp=
;<BR><EM>Glioblastoma=20
Cell Lines Expressed Surface Antigen Profile Similar to That of =
MSC</EM><BR>To=20
test whether the glioblastoma cells express surface markers<SUP>=20
</SUP>associated with MSC, we determined the surface expression of<SUP>=20
</SUP>CD29 (integrin =DF<SUB>1</SUB>/fibronectin receptor), CD44 =
(stromal<SUP>=20
</SUP>hyaluronic acid and osteopontin receptors), CD90 (Thy-1 cell<SUP>=20
</SUP>surface antigen), and CD105 [endoglin; transforming growth =
factor-=DF3<SUP>=20
</SUP>(TGF-=DF3) receptor], four important surface markers<SUP> =
</SUP>that have=20
been used partly for defining MSC (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB18">18</A=
>, <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB25">25</A=
>, <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB57">57</A=
>),=20
in<SUP> </SUP>glioblastoma cell lines. Using a four-color=20
fluorescence-activated<SUP> </SUP>cell sorting analysis, the majority of =
the=20
cell population in<SUP> </SUP>culture coexpressed all four antigens in =
all three=20
primary glioblastoma<SUP> </SUP>cell lines [W-98 (61.7%), D-431 (67.3%), =
and=20
F-502 (86.5%)],<SUP> </SUP>whereas negligible CD105<SUP>+</SUP> cells =
were=20
detected in the secondary<SUP> </SUP>glioblastoma cell line (S-496; <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FIG3">Fig. =
3A</A> ).=20
A lesser percentage<SUP> </SUP>of the long passaged U87-MG cells =
expressed CD90=20
(7.4%) and<SUP> </SUP>CD105 (24.8%), whereas purified peripheral blood=20
lymphocytes<SUP> </SUP>had few positive cells for any of four markers. =
All=20
glioblastoma<SUP> </SUP>cell lines are negative for CD14, CD34, and CD31 =
(data=20
not shown).<SUP> </SUP>Other MSC-associated markers, including CD73, =
CD109, and=20
CD140B<SUP> </SUP>mRNA, were also detected in all four glioblastoma cell =

lines<SUP> </SUP>using RT-PCR analysis (data not shown).<SUP> </SUP>
<P><A name=3DFIG3><!-- null --></A><BR clear=3Dall>
<CENTER>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"95%">
  <TBODY>
  <TR bgColor=3D#e1e1e1>
    <TD>
      <TABLE cellSpacing=3D2 cellPadding=3D2>
        <TBODY>
        <TR bgColor=3D#e1e1e1>
          <TD vAlign=3Dtop align=3Dmiddle bgColor=3D#ffffff><A=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607/FIG3"><IMG=20
            height=3D131 alt=3D"Figure 3" hspace=3D10=20
            =
src=3D"http://mcr.aacrjournals.org/content/vol4/issue9/images/small/607fi=
g03c.gif"=20
            width=3D200 vspace=3D5 border=3D2></A><BR><STRONG>View =
larger=20
            version</STRONG> (46K):<BR><NOBR><A=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607/FIG3">[in=20
            this window]</A><BR><A=20
            onmouseover=3D"window.status=3D'View figure in a separate =
window'; return true"=20
            onclick=3D"startTarget('FIG3', 590, 489); =
this.href=3D'/cgi/content-nw/full/4/9/607/FIG3'"=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content-nw/full/4/9/607/FIG3"=20
            target=3DFIG3>[in a new window]</A><BR>&nbsp;</NOBR> </TD>
          <TD vAlign=3Dtop align=3Dleft><B>FIGURE 3.</B> Expression of=20
            MSC-associated surface markers in glioblastoma cells. =
<B>A.</B>=20
            Coexpression of CD90, CD105, CD29, and CD44 in glioblastoma =
cell=20
            lines analyzed using four-color fluorescence-activated cell =
sorting=20
            analysis. The percentage of cells coexpressing four surface =
markers=20
            in each cell line was calculated by percentage of cells =
coexpressing=20
            CD90 and CD105 multiplied by percentage of cells =
coexpressing CD29=20
            and CD44 in the cell population that are double positive for =
CD90=20
            and CD105. <B>B.</B> Specific expression of CD105 in primary =

            glioblastoma tumors. Representative immunohistochemical =
staining of=20
            CD105 in clinical glioblastoma subgroups and normal brain. A =
subset=20
            of the images from a tissue array. Strong positivity of =
CD105=20
            antibody staining was detected in two primary glioblastomas. =

            Negative staining was detected in two secondary =
glioblastomas and=20
            two normal brain cores. Endothelial cells were stained =
positively=20
            for CD105. The incidence of the expressions of CD105 in =
primary=20
            glioblastoma was 19 of 45, whereas no positive staining was =
detected=20
            in secondary glioblastoma (0 of 16) or normal brain tissue =
(0 of=20
            18). Magnification, <FONT =
face=3Darial,helvetica>x</FONT>400.
            =
<P></P></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></CENTER>&nbsp=
;<BR>To=20
determine whether the differential expression of CD105 detected<SUP>=20
</SUP>between primary and secondary glioblastoma cell lines was =
also<SUP>=20
</SUP>observed <I>in vivo</I>, tissue microarrays were stained with=20
anti-CD105<SUP> </SUP>antibody. The result indicted that CD105 was =
strongly=20
expressed<SUP> </SUP>in a large fraction of malignant-appearing tumor =
cells in=20
primary<SUP> </SUP>glioblastoma biopsies (19 of 45), whereas both =
secondary=20
glioblastoma<SUP> </SUP>(0 of 16; <I>P</I> =3D 0.000867) and normal =
brain tissue=20
(0 of 18; <I>P</I><SUP> </SUP>=3D 0.0004856) were stained negatively for =
CD105.=20
CD105 was strongly<SUP> </SUP>expressed by endothelial cells as =
expected.<SUP>=20
</SUP>
<P><EM>Differentiation Plasticity of Glioblastoma Cells</EM><BR>As the =
both=20
primary glioblastoma tumors and their derived cell<SUP> </SUP>cultures =
retained=20
the molecular expression pattern suggestive<SUP> </SUP>of a MSC-like=20
characteristics, we sought to functionally test<SUP> </SUP>whether =
glioblastoma=20
cells possess stem-like plasticity. To<SUP> </SUP>prevent cell =
selection, the=20
cell differentiation was tested<SUP> </SUP>in both cloned and noncloned =
cell=20
cultures. Noncloned glioblastoma<SUP> </SUP>cells were treated with =
adipogenic,=20
osteogenic, and chondrogenic<SUP> </SUP>induction medium and the cells =
were=20
analyzed for the induction<SUP> </SUP>into the various cell types. Under =
the=20
adipogenic treatment,<SUP> </SUP>three tested primary glioblastoma cell =
lines=20
(W-98, D-431, and<SUP> </SUP>F-502) formed oil red-O-positive cells with =

cytoplasmic accumulation<SUP> </SUP>of lipid vacuoles and eccentric =
deviation of=20
nuclease within<SUP> </SUP>cells (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FIG4">Fig. =
4A</A> ).=20
In contrast, the treated secondary glioblastoma<SUP> </SUP>cell line =
(S-496)=20
only showed weak staining. The treated human<SUP> </SUP>foreskin =
fibroblasts and=20
all nontreated glioblastoma cells were<SUP> </SUP>negative for oil red-O =

staining. Osteogenic differentiation<SUP> </SUP>of glioblastoma cell =
lines was=20
evident with the detection of<SUP> </SUP>alkaline phosphatase=96positive =
cells (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FIG4">Fig. =
4B</A>),=20
which were<SUP> </SUP>observed in all three induced primary glioblastoma =
cell=20
lines.<SUP> </SUP>F-502, which showed the strongest activity of alkaline =

phosphatase,<SUP> </SUP>also formed strong calcium deposits (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FIG4">Fig. =
4B</A>),=20
which were stained<SUP> </SUP>with silver by von Kossa method, whereas =
only few=20
deposits can<SUP> </SUP>be detected in the cultures of W-98 and D-431 =
(data not=20
shown).<SUP> </SUP>In contrast, only a few alkaline =
phosphatase=96positive<SUP>=20
</SUP>cells were identified in S-496 cultures and fibroblast =
cultures.<SUP>=20
</SUP>Chondrogenic differentiation of glioblastoma cells was =
induced<SUP>=20
</SUP>in serum-free medium supplemented with TGF-=DF3. Collagen<SUP> =
</SUP>type=20
II=96positive cells were detected in all three induced<SUP> =
</SUP>primary=20
glioblastoma cell lines (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FIG4">Fig. =
4C</A>) by=20
immunohistochemical<SUP> </SUP>staining. Unexpectedly, collagen type =
II=96positive=20
cells<SUP> </SUP>were also seen in the fibroblast culture. None of the=20
nontreated<SUP> </SUP>cells was positive for collagen type II. The =
treated=20
secondary<SUP> </SUP>glioblastoma cell line that lack of CD105 marker =
did not=20
survive<SUP> </SUP>through the culture of chondrogenic treatment in the=20
serum-free<SUP> </SUP>medium, suggesting that CD105 is indeed a =
functional=20
marker<SUP> </SUP>for MSC and that chondrogenesis is driven by =
TGF-=DF-CD105<SUP>=20
</SUP>signaling. The mesenchymal differentiation was further shown<SUP> =
</SUP>in=20
the cloned and expanded glioblastoma cell lines as well as<SUP> </SUP>in =
bone=20
marrow=96derived stromal cells (data not shown).<SUP> </SUP>The =
transcription=20
level of lineage-specific genes in glioblastoma<SUP> </SUP>cells was =
determined=20
using a real-time quantitative RT-PCR assay.<SUP> </SUP>Although the=20
lineage-specific protein cannot be detected in<SUP> </SUP>noninduced =
cells (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FIG4">Fig. =
4D</A>),=20
low levels of baseline mRNA expression<SUP> </SUP>were detected using =
RT-PCR=20
amplification. As such, the highest<SUP> </SUP>amount of =
lineage-specific mRNA=20
level postinduction did not<SUP> </SUP>always correspond with the =
highest fold=20
increase when compared<SUP> </SUP>with baseline level. When compared =
with=20
nontreated cultures,<SUP> </SUP>markedly increased lineage-specific mRNA =
levels=20
of adipocyte<SUP> </SUP>(fatty acid=96binding protein 4), bone (alkaline =

phosphatase),<SUP> </SUP>and cartilage (collagen type II) were detected =
in=20
glioblastoma<SUP> </SUP>cell cultures from primary tumors, which were =
treated=20
with the<SUP> </SUP>corresponding agent. The transcripts of alkaline=20
phosphatase<SUP> </SUP>were strongly induced (42-fold) in S-496 =
(secondary=20
glioblastoma<SUP> </SUP>cell line). Cells with positive immunostaining =
of=20
collagen type<SUP> </SUP>II were detected in a fibroblast cell culture =
treated=20
with a<SUP> </SUP>chondrogenic medium. The quantitative RT-PCR, however, =

displayed<SUP> </SUP>lower induction of collagen type II mRNA expression =
when=20
compared<SUP> </SUP>with glioblastoma cell lines.<SUP> </SUP>
<P><A name=3DFIG4><!-- null --></A><BR clear=3Dall>
<CENTER>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"95%">
  <TBODY>
  <TR bgColor=3D#e1e1e1>
    <TD>
      <TABLE cellSpacing=3D2 cellPadding=3D2>
        <TBODY>
        <TR bgColor=3D#e1e1e1>
          <TD vAlign=3Dtop align=3Dmiddle bgColor=3D#ffffff><A=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607/FIG4"><IMG=20
            height=3D200 alt=3D"Figure 4" hspace=3D10=20
            =
src=3D"http://mcr.aacrjournals.org/content/vol4/issue9/images/small/607fi=
g04c.gif"=20
            width=3D112 vspace=3D5 border=3D2></A><BR><STRONG>View =
larger=20
            version</STRONG> (50K):<BR><NOBR><A=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607/FIG4">[in=20
            this window]</A><BR><A=20
            onmouseover=3D"window.status=3D'View figure in a separate =
window'; return true"=20
            onclick=3D"startTarget('FIG4', 397, 640); =
this.href=3D'/cgi/content-nw/full/4/9/607/FIG4'"=20
            =
href=3D"http://mcr.aacrjournals.org/cgi/content-nw/full/4/9/607/FIG4"=20
            target=3DFIG4>[in a new window]</A><BR>&nbsp;</NOBR> </TD>
          <TD vAlign=3Dtop align=3Dleft><B>FIGURE 4.</B> Mesenchymal=20
            differentiation plasticity of primary glioblastoma cells. =
<B>A.</B>=20
            Adipogenic differentiation. In comparison with nontreated =
controls,=20
            adipogenic differentiation in primary glioblastoma cell =
cultures was=20
            evident by the accumulation of lipid vesicles (W-98, D-431, =
and=20
            F-502) that stain with oil red-O. Such changes were not =
observed in=20
            cells derived from fibroblasts and lesser degree in =
secondary=20
            glioblastoma cells (S-496). Magnification, <FONT=20
            face=3Darial,helvetica>x</FONT>400. <B>B.</B> Osteogenic =
induction.=20
            Osteogenic differentiation in primary glioblastoma cell =
cultures=20
            (W-98, D-431, and F-502) was indicated by the various degree =
of=20
            positive stain for alkaline phosphatase. Only a few positive =
cells=20
            were identified in secondary glioblastoma cell line (S-496) =
and=20
            cultured fibroblasts. No staining was detected in nontreated =
cells.=20
            F-502 cells stained by von Kossa technique show the presence =
of=20
            calcium. Magnification, <FONT =
face=3Darial,helvetica>x</FONT>400.=20
            <B>C.</B> Chondrogenic induction. Primary glioblastoma cells =
treated=20
            with chondrogenic medium show positive immunostaining for =
the=20
            collagen type II (F-502, D-431, and W-98). Lesser degree of =
staining=20
            was indicated in fibroblast cultures and negative staining =
for=20
            nontreated cells. Magnification, <FONT=20
            face=3Darial,helvetica>x</FONT>400. <B>D.</B> Induction of=20
            lineage-specific mRNA expression in glioblastoma cells =
treated with=20
            differentiation agents. A real-time quantitative RT-PCR =
analysis of=20
            lineage-specific mRNA expression was done in two sets of =
nontreated,=20
            adipogenic, osteogenic, and chondrogenic medium-treated cell =

            cultures. Total RNA was analyzed for the lineage-specific =
mRNA=20
            expression that is restricted to the adipocytic (fatty =
acid=96binding=20
            protein), osteoblastic (alkaline phosphatase), or =
chondrocytic=20
            (collagen type II) lineage. The quantitation of specific =
transcripts=20
            in cells was calculated and expressed by the =
lineage-specific mRNA=20
            ratio to glyceraldehyde-3-phosphate dehydrogenase. The fold =
increase=20
            was calculated by comparison of mRNA levels in treated and=20
            nontreated samples. Representative of two sets of cultures.
            =
<P></P></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></CENTER>&nbsp=
;<BR>Conversely,=20
when these glioblastoma cell lines were cultured<SUP> </SUP>in the =
serum-free=20
medium supplemented with EGF and fibroblast<SUP> </SUP>growth factor =
(NSC=20
culture condition), they formed glioblastoma<SUP> </SUP>spheres=20
(neurosphere-like) and could be passaged in sphere cultures<SUP> =
</SUP>that=20
express CD133, NES, and SOX2.<A name=3DRFN1></A><SUP><A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FN1">7</A></=
SUP>=20
Moreover, these NSC-like<SUP> </SUP>glioblastoma spheres can be induced =
for full=20
or partial differentiation<SUP> </SUP>into neuronal, oligodendrocytic, =
and=20
astrocytic differentiation<SUP> </SUP>as described by others (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB4">4</A>-=
<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB7">7</A>)=
,=20
suggesting that glioblastoma cells<SUP> </SUP>express stem-like =
properties and=20
plasticity.<SUP> </SUP>
<P><A name=3DSEC3><!-- null --></A><BR clear=3Dright>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"100%" bgColor=3D#e1e1e1>
  <TBODY>
  <TR>
    <TD vAlign=3Dcenter align=3Dleft width=3D"5%" bgColor=3D#ffffff><IMG =
height=3D21=20
      alt=3D" " hspace=3D5 =
src=3D"http://mcr.aacrjournals.org/icons/toc/rarrow.gif"=20
      width=3D10></TD>
    <TH vAlign=3Dcenter align=3Dleft width=3D"95%"><FONT =
size=3D+2>&nbsp;&nbsp;=20
      Discussion </FONT></TH></TR></TBODY></TABLE>
<TABLE cellPadding=3D5 align=3Dright border=3D1>
  <TBODY>
  <TR>
    <TH align=3Dleft><FONT size=3D-1><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#top"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Top<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FN"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Notes<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#ABS"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Abstract<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC1"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Introduction<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC2"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Results<BR></A><IMG height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/dot.gif" width=3D11=20
      border=3D0><FONT color=3D#464c53>Discussion</FONT><BR><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC4"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Materials and Methods<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#ACK"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Acknowledgements<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIBL"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      =
border=3D0>References<BR></A></FONT></TH></TR></TBODY></TABLE>&nbsp;<BR>P=
reviously,=20
we have used large-scale gene expression analysis<SUP> </SUP>to =
characterize=20
primary and secondary glioblastomas. By comparing<SUP> </SUP>with =
low-grade=20
astrocytoma, we have identified a series of glioblastoma-associated<SUP> =

</SUP>genes that could distinguish primary glioblastomas from the<SUP>=20
</SUP>secondary glioblastomas (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB14">14</A=
>). The=20
comparison with lower-grade<SUP> </SUP>astrocytomas was done to attempt=20
selecting for genes, which<SUP> </SUP>are specific to the end malignant=20
transformation into the highly<SUP> </SUP>invasive glioblastomas. =
Secondary=20
glioblastoma-associated genes<SUP> </SUP>primarily include mitotic cell =
cycle=20
components, suggesting<SUP> </SUP>loss of function in prominent cell =
cycle=20
regulators, whereas<SUP> </SUP>primary glioblastoma-associated genes =
highlight=20
genes expressed<SUP> </SUP>in mesenchyme-derived tissues and stromal =
response,=20
suggesting<SUP> </SUP>the augmentation of extracellular signaling =
operating the=20
malignancy.<SUP> </SUP>To identify genes potentially link to cellular =
properties=20
and<SUP> </SUP>tumorigenesis of primary glioblastoma, in this study, we=20
compared<SUP> </SUP>primary glioblastoma with normal brain tissue. We=20
identified<SUP> </SUP>a series of fundamental MSC-associated genes =
overexpressed=20
in<SUP> </SUP>glioblastoma biopsies, raising the question whether =
primary<SUP>=20
</SUP>glioblastoma fundamentally possess mesenchymal properties or<SUP>=20
</SUP>acquire these properties under environmental guidance during<SUP>=20
</SUP>the tumor progression.<SUP> </SUP>
<P>Evidently, that <I>YKL-40, TNC, osteonectin</I>, and <I>CD105</I>, =
four=20
genes<SUP> </SUP>that are ontogenically associated with mesenchymal =
tissues=20
but<SUP> </SUP>not to neural lineage, were overexpressed in primary=20
glioblastoma<SUP> </SUP>tumor cells suggest that primary glioblastoma =
possess=20
mesenchymal<SUP> </SUP>properties. The finding of glioblastoma cell =
lines=20
expressing<SUP> </SUP>cellular and molecular signatures of MSC and were =
able to=20
be<SUP> </SUP>induced and differentiated into mesenchymal lineage cell=20
types<SUP> </SUP>further supports the concept that a subset of primary=20
glioblastoma<SUP> </SUP>possesses MSC-like properties. Many=20
bone/cartilage-associated<SUP> </SUP>factors have been implicated in=20
angiogenesis/neovascularization,<SUP> </SUP>cell proliferation, =
antiapoptosis,=20
EMT, and cell migration;<SUP> </SUP>therefore, these =
mesenchymal-associated=20
factors may participate<SUP> </SUP>in promoting tumorigenesis and =
malignant=20
progression. If primary<SUP> </SUP>glioblastomas truly possess MSC-like=20
properties and constitutively<SUP> </SUP>express =
bone/cartilage-associated=20
factors, it may explain in<SUP> </SUP>part for its developmental =
aggressiveness=20
without an identifiable<SUP> </SUP>less malignant precursor lesion in =
contrast=20
to that secondary<SUP> </SUP>glioblastoma. Indeed, our previous study, =
which=20
includes 63<SUP> </SUP>glioblastoma tumors (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB13">13</A=
>),=20
showed that glioblastoma subtype (group<SUP> </SUP>HC2B) defined by=20
overexpression of ECM/mesenchymal components<SUP> </SUP>is associated =
with=20
shorter survival and is enriched in primary<SUP> </SUP>glioblastoma (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB14">14</A=
>).=20
Further, 52% (24 of 46) of primary glioblastoma<SUP> </SUP>overexpress=20
mesenchymal-associated genes, whereas 85% of recurrent<SUP> =
</SUP>primary=20
glioblastoma that had previous treatment express mesenchymal<SUP>=20
</SUP>phenotype (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB14">14</A=
>),=20
suggesting that mesenchymal properties confer<SUP> </SUP>the malignant =
and=20
antiapoptotic phenotype. Loss of chromosome<SUP> </SUP>10 and chromosome =
7/7p=20
amplification are the most frequently<SUP> </SUP>observed in primary=20
glioblastomas that are associated with poor<SUP> </SUP>prognosis (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB56">56</A=
>). A=20
gain of chromosome 7 has been suggested to<SUP> </SUP>confer radiation=20
resistance (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB58">58</A=
>). Many=20
mesenchymal-associated<SUP> </SUP>genes on chromosome 7, which are =
up-regulated=20
in primary glioblastoma,<SUP> </SUP>were reported to be associated with =
Akt=20
phosphorylation, antiapoptosis,<SUP> </SUP>hypoxia, angiogenesis, and =
EMT (ref.=20
<A =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB14">14</A=
>; <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#TBL1">Table =
1</A>).=20
Therefore,<SUP> </SUP>the overexpression of mesenchymal properties in=20
glioblastoma<SUP> </SUP>cells is likely to confer the resistance to =
treatment=20
and tumor<SUP> </SUP>recurrence. Similar observations have been reported =
by=20
Phillips<SUP> </SUP>et al. (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB55">55</A=
>), which=20
indicate that glioblastoma characterized<SUP> </SUP>by resemblance to =
tissue of=20
mesenchymal origin is associated<SUP> </SUP>with gain of chromosome 7=20
accompanied by a loss of chromosome<SUP> </SUP>10, robust angiogenesis,=20
up-regulation of Akt activation, and<SUP> </SUP>overexpression of =
YKL-40, CD44,=20
signal transducer and activator<SUP> </SUP>of transcription 3, and=20
vimentin.<SUP> </SUP>
<P>Using tissue microarrays, we have verified four MSC-associated<SUP>=20
</SUP>genes that are overexpressed in primary glioblastoma cells =
[i.e.,<SUP>=20
</SUP><I>YKL-40</I> (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB14">14</A=
>),=20
<I>TNC, osteonectin</I>, and <I>CD105</I>], indicative of =
mesenchymal<SUP>=20
</SUP>origin in a subset of primary glioblastoma. Glioblastoma =
cells<SUP>=20
</SUP>express four MSC-associated surface markers that can be =
induced<SUP>=20
</SUP>to differentiate into mesenchymal lineage-like cell types =
defined<SUP>=20
</SUP>by morphologic, histologic, immunologic, and molecular=20
characteristics<SUP> </SUP>that have been well documented in the =
literature.=20
Although up-regulation<SUP> </SUP>of tissue-specific genes =
postdifferentiation=20
treatment supported<SUP> </SUP>the induction of mesenchymal lineage cell =
type=20
differentiation,<SUP> </SUP>we, however, have observed differential=20
magnitude/degree of<SUP> </SUP>differentiation induction among the cells =
in=20
cultures and between<SUP> </SUP>the cell lines, suggesting that =
mesenchymal=20
glioblastoma cells<SUP> </SUP>are not normal MSC. Gene mutation may =
prevent=20
poorly differentiated<SUP> </SUP>glioblastoma cells from terminal=20
differentiation (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB47">47</A=
>) even=20
under<SUP> </SUP>the differentiation treatment. YKL-40 is a growth =
factor=20
for<SUP> </SUP>connective tissue cells and a potent migration factor for =

endothelial<SUP> </SUP>cells (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB59">59</A=
>).=20
Recently, overexpression of YKL-40 was reported<SUP> </SUP>to be =
associated with=20
poorer response to radiation and shorter<SUP> </SUP>overall survival in=20
glioblastomas (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB55">55</A=
>, <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB60">60</A=
>). TNC=20
is a secreted<SUP> </SUP>ECM protein highly up-regulated in many types =
of=20
cancers and<SUP> </SUP>has been shown to play a role in promoting =
angiogenesis=20
and<SUP> </SUP>invasion of human glioma cells (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB61">61</A=
>-<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB63">63</A=
>).=20
Osteonectin is a secreted<SUP> </SUP>glycoprotein that binds to ECM and =
promotes=20
tissue remodeling,<SUP> </SUP>angiogenesis, and embryonic development =
(<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB64">64</A=
>). A=20
study showed<SUP> </SUP>that osteonectin mediates cellular survival of =
gliomas=20
through<SUP> </SUP>Akt activation (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB65">65</A=
>).=20
CD105, the TGF-=DF3 receptor, plays<SUP> </SUP>a role in TGF-=DF =
signaling in the=20
control of chondrogenic<SUP> </SUP>and osteogenic differentiation (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB66">66</A=
>).=20
TGF-=DF-CD105 signaling<SUP> </SUP>pathway, therefore, may contribute to =
EMT=20
phenotype as well<SUP> </SUP>as the <I>in vivo</I> mesodermal =
differentiation in=20
primary glioblastoma<SUP> </SUP>(<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB12">12</A=
>). This=20
hypothesis is further supported by the detection<SUP> </SUP>of =
overexpression of=20
<I>TGFBI</I> gene in primary glioblastoma tumors,<SUP> </SUP>one of the =
most=20
highly represented genes in MSC (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB25">25</A=
>).=20
TGF-=DF<SUP> </SUP>signaling has been shown to stimulate tumor cell =
motility,=20
invasiveness,<SUP> </SUP>neovascularization, and EMT. Synergistically, =
CD44=20
(4-fold increase<SUP> </SUP>in glioblastoma tumors compared with normal =
brain=20
tissue) is<SUP> </SUP>a cell surface receptor for hyaluronate and =
osteopontin,=20
and<SUP> </SUP>their interactions can synergize tumor cell growth,=20
migration,<SUP> </SUP>and cellular chemotaxis (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB67">67</A=
>).=20
Integrin =DF<SUB>1</SUB> (CD29) is<SUP> </SUP>a predominant adhesion =
receptor used=20
by stromal precursor cells<SUP> </SUP>for adhesion, proliferation, and=20
development into osteoblast-like<SUP> </SUP>cells (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB68">68</A=
>). The=20
expression of Thy-1 (CD90) glycoprotein implicated<SUP> </SUP>a=20
myofibroblastic/EMT phenotype (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB69">69</A=
>).=20
Therefore, the link between<SUP> </SUP>mesenchymal glioblastoma and poor =

prognosis is likely triggered<SUP> </SUP>by the activation of=20
inflammatory/stromal/angiogenesis program<SUP> </SUP>driven by =
MSC-associated=20
markers through autocrine and paracrine<SUP> </SUP>fashion in tumor =
<I>in=20
situ</I>.<SUP> </SUP>
<P>The identification of genes that are associated with embryonic<SUP>=20
</SUP>neural epithelial stem cells (e.g., <I>SOX</I> genes and =
<I>NES</I>)=20
revealed<SUP> </SUP>the neural origin of primary glioblastoma as well as =
its=20
stem-like<SUP> </SUP>status. SOX transcripts were also detected in =
glioblastoma=20
cell<SUP> </SUP>lines (data not shown). NES and SOX proteins are often=20
regarded<SUP> </SUP>as markers for neural primordium and have been shown =
to=20
have<SUP> </SUP>regulatory link (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB70">70</A=
>). EMT=20
is the hallmark of embryo development<SUP> </SUP>and an essential =
process that=20
governs morphogenesis (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB71">71</A=
>-<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB73">73</A=
>).<SUP>=20
</SUP>Therefore, mesenchymal properties and highly invasive =
phenotype<SUP>=20
</SUP>of primary glioblastoma may simply reflect the reactivation<SUP> =
</SUP>of=20
the molecular properties of radial glial cells, which migrate<SUP> =
</SUP>out of=20
the subventricular zone during embryogenesis. Alternatively,<SUP> =
</SUP>gene=20
mutation, for instance, overexpression of <I>EGFR</I> gene or<SUP> =
</SUP>PTEN=20
deletion, may initiate a distinct program of gene expression<SUP> =
</SUP>and turn=20
on mesenchymal master genes. It has been shown that<SUP> </SUP>EGF but =
not=20
platelet-derived growth factor can stimulate the<SUP> =
</SUP>differentiation of=20
MSC into bone-forming cells (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB74">74</A=
>).=20
TGF-=DF,<SUP> </SUP>Ras, and phosphatidylinositol 3-kinase/Akt =
signaling,=20
components<SUP> </SUP>associated with EGFR and PTEN pathway, coordinated =

activation<SUP> </SUP>EMT (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB70">70</A=
>, <A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB75">75</A=
>-<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB79">79</A=
>), which=20
has been implicated in tumor recurrence<SUP> </SUP>and self-renewal (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB40">40</A=
>).<SUP>=20
</SUP>
<P>In summary, we have shown that primary glioblastoma tumors and<SUP>=20
</SUP>cell lines express the molecular signatures of MSC and NSC.<SUP>=20
</SUP>These molecular properties may therefore confer their =
capability<SUP>=20
</SUP>of differentiation into both neural and mesenchymal lineage<SUP>=20
</SUP>cell types. It is likely that these properties will greatly<SUP>=20
</SUP>affect the biological/pathologic behavior of the glioblastoma<SUP> =

</SUP>cells <I>in vivo</I> not only in the developmental stage but also=20
during<SUP> </SUP>the malignant progression. This finding may affect the =

design<SUP> </SUP>of effective therapies currently not considered for=20
primary<SUP> </SUP>glioblastomas that are more commonly used for =
mesenchymal=20
origin<SUP> </SUP>tumors. Thus, MSC-like properties may play a role in =
the=20
tumorigenesis,<SUP> </SUP>invasive progression, and tumor =
recurrence.<SUP>=20
</SUP>
<P><A name=3DSEC4><!-- null --></A><BR clear=3Dright>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"100%" bgColor=3D#e1e1e1>
  <TBODY>
  <TR>
    <TD vAlign=3Dcenter align=3Dleft width=3D"5%" bgColor=3D#ffffff><IMG =
height=3D21=20
      alt=3D" " hspace=3D5 =
src=3D"http://mcr.aacrjournals.org/icons/toc/rarrow.gif"=20
      width=3D10></TD>
    <TH vAlign=3Dcenter align=3Dleft width=3D"95%"><FONT =
size=3D+2>&nbsp;&nbsp;=20
      Materials and Methods </FONT></TH></TR></TBODY></TABLE>
<TABLE cellPadding=3D5 align=3Dright border=3D1>
  <TBODY>
  <TR>
    <TH align=3Dleft><FONT size=3D-1><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#top"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Top<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FN"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Notes<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#ABS"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Abstract<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC1"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Introduction<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC2"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Results<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC3"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Discussion<BR></A><IMG height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/dot.gif" width=3D11=20
      border=3D0><FONT color=3D#464c53>Materials and =
Methods</FONT><BR><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#ACK"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Acknowledgements<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIBL"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      =
border=3D0>References<BR></A></FONT></TH></TR></TBODY></TABLE>&nbsp;<BR><=
EM>Tumor=20
Samples</EM><BR>Tumor samples presented here are derived from a =
published=20
microarray<SUP> </SUP>study (<A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIB14">14</A=
>). The=20
patient tumors and normal samples were collected<SUP> </SUP>either from=20
autopsies of glioblastoma patients within 24 hours<SUP> </SUP>of death =
or from=20
patients who underwent surgery at University<SUP> </SUP>of California at =
Los=20
Angeles Medical Center. All samples were<SUP> </SUP>collected under =
protocols=20
approved by the University of California<SUP> </SUP>at Los Angeles =
Institutional=20
Review Board. All histopathologic<SUP> </SUP>typing and tumor grading =
were done=20
by one neuropathologist (P.S.M.)<SUP> </SUP>according to the WHO =
criteria. The=20
subgrouping of glioblastomas<SUP> </SUP>was based on clinical =
presentation.=20
Secondary glioblastomas<SUP> </SUP>were called if there was previous =
pathologic=20
evidence of lower-grade<SUP> </SUP>glioblastoma. All tumors without =
prior=20
evidence of progression<SUP> </SUP>from a lower-grade tumor were =
clinically=20
classified as primary<SUP> </SUP>glioblastomas.<SUP> </SUP>
<P><EM>Microarray Procedures and Data Analysis</EM><BR>Total RNA was =
isolated=20
from tumor samples using a Trizol reagent<SUP> </SUP>(Invitrogen Life=20
Technologies, Carlsbad, CA). Complementary<SUP> </SUP>DNA was generated =
and=20
converted to cRNA probes using standard<SUP> </SUP>Affymetrix protocols =
and=20
hybridized to U133A oligonucleotide<SUP> </SUP>microarray (GeneChip =
Human Genome=20
U133A, Affymetrix, Santa Clara,<SUP> </SUP>CA), which represents <IMG =
alt=3D~=20
src=3D"http://mcr.aacrjournals.org/math/sim.gif" border=3D0>14,500 human =

transcripts. The chips were<SUP> </SUP>scanned using the GeneArray =
scanner=20
(Affymetrix). The CEL files<SUP> </SUP>generated by the Affymetrix =
Microarray=20
Suite version 5.0 were<SUP> </SUP>converted into DCP files using the =
DNA-Chip=20
Analyzer (dChip<SUP> </SUP>1.3; <A=20
href=3D"http://biosun1.harvard.edu/complab/dchip/">http://biosun1.harvard=
.edu/complab/dchip/</A>).=20
The DCP files<SUP> </SUP>were globally normalized, and gene expression =
values=20
were generated<SUP> </SUP>using the dChip implementation of =
perfect-match minus=20
mismatch<SUP> </SUP>model-based expression index. The group comparisons =
were=20
done<SUP> </SUP>in dChip. In addition, to avoid inclusion of low-level =
and=20
unreliable<SUP> </SUP>signals, the higher signal needed to exceed 100 =
and be=20
called<SUP> </SUP>present by Microarray Suite version 5.0 in &gt;20% of =
the=20
samples.<SUP> </SUP>Gene annotation and tissue distribution was obtained =
from=20
published<SUP> </SUP>literature (PubMed), the GeneReport of the Source =
database=20
(<A =
href=3D"http://source.stanford.edu/">http://source.stanford.edu/</A>),<SU=
P>=20
</SUP>human genome expression profile (<A=20
href=3D"http://telethon.bio.unipd.it/bioinfo/HGXP_170/index.html#">http:/=
/telethon.bio.unipd.it/bioinfo/HGXP_170/index.html#</A>),<SUP>=20
</SUP>and University of California at Los Angeles normal tissue=20
transcription<SUP> </SUP>database (<A=20
href=3D"http://www.dev.gmod.org/">http://www.dev.gmod.org/</A>).<SUP> =
</SUP>
<P><EM>Cell Lines</EM><BR>Four permanent glioblastoma cell lines, W-98, =
D-431,=20
F-502,<SUP> </SUP>and S-496, were established from clinical specimens. =
W-98,=20
D-431,<SUP> </SUP>and F-502 were derived from patients with primary=20
glioblastoma<SUP> </SUP>and the S-496 cell line was derived from a =
patient with=20
secondary<SUP> </SUP>glioblastoma. No evidence of histopathology showed=20
gliosarcoma<SUP> </SUP>biphasic pattern in tumors. Cell lines were =
maintained in=20
DMEM/Ham's<SUP> </SUP>F-12 (Mediatech, Inc., Herndon, VA) supplemented =
with 10%=20
fetal<SUP> </SUP>bovine serum, <FONT size=3D-2>L</FONT>-glutamine, and =
antibiotics=20
(100 units/mL penicillin<SUP> </SUP>and 100 =B5g/mL streptomycin). =
Glioblastoma=20
cell lines were<SUP> </SUP>further cloned at 0.5 cell per well in =
96-well plate=20
and the<SUP> </SUP>single-cell colonies were further expanded to =
permanent=20
cell<SUP> </SUP>lines. The glioblastoma cell line U87-MG and a newborn=20
foreskin<SUP> </SUP>fibroblast cell line, Hs. 27, were purchased from =
American=20
Type<SUP> </SUP>Culture Collection (Manassas, VA). Other types of human=20
tumor<SUP> </SUP>cell lines, rat chondrosarcoma cell line, and human =
bone=20
marrow<SUP> </SUP>stromal cells as indicted in the text were obtained =
from=20
multiple<SUP> </SUP>laboratories at University of California at Los =
Angeles=20
and<SUP> </SUP>were maintained in the same culture condition.<SUP> =
</SUP>
<P><EM>LOH Analysis</EM><BR>Genomic DNA (500 ng) from each cell line was =

amplified, labeled,<SUP> </SUP>and hybridized under manufacturer's =
recommended=20
conditions using<SUP> </SUP>the GeneChip Human Mapping 10K Array =
<I>Xba</I>I 131=20
(Affymetrix).<SUP> </SUP>Raw allele scores were processed using =
Affymetrix=20
GeneChip Chromosome<SUP> </SUP>Copy Number Tool 1.1 to estimate =
genome-wide=20
chromosomal gains<SUP> </SUP>and losses.<SUP> </SUP>
<P><EM>Immunohistochemistry and Immunocytochemical Analysis</EM><BR>A=20
high-density glioblastoma tissue array was constructed consisting<SUP> =
</SUP>of=20
three representative 0.6-mm cores from formalin-fixed, =
paraffin-embedded<SUP>=20
</SUP>tissue blocks from each of 60 primary glioblastomas, 16 =
secondary<SUP>=20
</SUP>glioblastomas, and 15 corresponding normal brain tissues. =
Microscope<SUP>=20
</SUP>slides were treated with 0.01 mol/L sodium citrate buffer (pH<SUP> =

</SUP>6.0). A 1-hour blocking step was done using 2% normal horse<SUP>=20
</SUP>serum followed by the application of primary antibody to TNC<SUP>=20
</SUP>(1:200; Chemicon, Temecula, CA), osteonectin (1:1,000; =
Chemicon),<SUP>=20
</SUP>CD105 (1:400; Invitrogen), or control antibody overnight at<SUP>=20
</SUP>4=B0C. Subsequent immunodetection was done using Vectastain<SUP> =
</SUP>ABC=20
Standard kit (Vector Laboratories, Burlingame, CA) and Vector<SUP> =
</SUP>NovaRED=20
(Vector Laboratories). Staining intensity in tissue<SUP> </SUP>array was =
scored=20
by a neuropathologist (K.Y.) based on a scale<SUP> </SUP>of 0 to 2, in =
which=20
negatively stained specimens were graded<SUP> </SUP>0, weakly positive =
samples=20
were graded 1, and strongly positive<SUP> </SUP>spots were graded 2. The =

significance of differences in the<SUP> </SUP>incidence of marker =
expression in=20
primary and secondary glioblastomas<SUP> </SUP>or normal brain tissue =
was=20
calculated using one-tailed, two-proportion<SUP> </SUP><I>Z</I>-test.=20
Immunocytochemical staining was done on cell culture,<SUP> </SUP>which =
was=20
seeded on an eight-chamber culture slide (Nunc, Rochester,<SUP> =
</SUP>NY)=20
overnight. Cells were fixed for 30 minutes with 4% formaldehyde<SUP>=20
</SUP>solution and permeablized with 0.3% Triton X-100/PBS for 10<SUP>=20
</SUP>minutes followed by incubation with 5% goat serum for 20 =
minutes.<SUP>=20
</SUP>After washing with PBS, cells were incubated for 2 hour with<SUP>=20
</SUP>anti-YKL-40, anti-NES, control antibody, or no first =
antibody.<SUP>=20
</SUP>After washing, cells were incubated with rhodamine red or =
Alexa<SUP>=20
</SUP>Fluor 488=96conjugated goat anti-mouse IgG (1:200). The<SUP> =
</SUP>cells=20
were counterstained with Hoechst 33342 to identify all<SUP> =
</SUP>nuclei.<SUP>=20
</SUP>
<P><EM>Fluorescence-Activated Cell Sorting=20
Analysis</EM><BR>Fluorescence-activated cell sorting analyses were done =
to=20
analyze<SUP> </SUP>MSC antigen markers in glioblastoma cell lines.=20
Glioblastoma<SUP> </SUP>cells (5 <FONT face=3Darial,helvetica>x</FONT>=20
10<SUP>5</SUP>) were stained with antibody cocktails for 30<SUP> =
</SUP>minutes=20
at 4=B0C and the free antibody was removed by two<SUP> </SUP>washes. The =
analyses=20
were done on a FACSCalibur flow cytometer<SUP> </SUP>(Becton Dickinson, =
San=20
Jose, CA) and <IMG alt=3D&#8805; =
src=3D"http://mcr.aacrjournals.org/math/ge.gif"=20
border=3D0>10,000 events were collected<SUP> </SUP>in each analysis with =
forward=20
scatter and side scatter as well<SUP> </SUP>as four fluorescent =
measurements:=20
FL1 (FITC), FL2 (PE), FL3<SUP> </SUP>(PE-Cy5), and FL4 (APC). Data were =
analyzed=20
by using CellQuest<SUP> </SUP>3.1 (De Novo Software, Thornhill, Ontario, =

Canada). The following<SUP> </SUP>antibodies were employed: CD44-FITC, =
CD105-PE,=20
CD90-APC, CD29-TC,<SUP> </SUP>CD34-FITC, CD14-FITC, CD31, and isotype =
control=20
antibodies (Becton<SUP> </SUP>Dickinson; Caltag Laboratories, =
Burlingame, CA;=20
and R&amp;D<SUP> </SUP>Systems, Inc., Minneapolis, MN). For four-color =
analyses,=20
cells<SUP> </SUP>were gated for double positive for CD90-APC and =
CD105-PE=20
and<SUP> </SUP>then analyzed for their coexpression of CD44-FITC and=20
CD29-TC.<SUP> </SUP>
<P><EM><I>In vitro</I> Induction of Multiple Cell Lineage=20
Differentiation</EM><BR>The mesenchymal lineage differentiation was =
assessed in=20
cloned<SUP> </SUP>and expanded glioblastoma cell lines. Adipogenic=20
differentiation<SUP> </SUP>was assessed by incubating cells with DMEM-LG =
plus=20
10% fetal<SUP> </SUP>bovine serum supplemented with 0.5 =B5mol/L=20
hydrocortisone,<SUP> </SUP>0.5 =B5mol/L isobutyl methylxanthine, and 60=20
=B5mol/L<SUP> </SUP>indomethacin (Sigma-Aldrich, St. Louis, MO) for 2 =
weeks.=20
Osteogenic<SUP> </SUP>inductions were carried out by incubating cells =
with=20
DMEM-LG<SUP> </SUP>supplemented with 10% fetal bovine serum, =
10<SUP>=968</SUP>=20
mol/L dexamethasone,<SUP> </SUP>0.2 mmol/L ascorbic acid, and 10 mmol/L=20
=DF-glycerophosphate<SUP> </SUP>(Sigma-Aldrich) for 3 weeks. =
Chondrogenic=20
inductions were carried<SUP> </SUP>out in suspension culture of =
micromass=20
pellets or adherent cultures<SUP> </SUP>with high cell density. Cells =
were=20
incubated with serum-free<SUP> </SUP>DMEM-LG supplemented with 10 ng/mL =
TGF-=DF3=20
(R&amp;D<SUP> </SUP>Systems), 100 nmol/L dexamethasone, 50 =B5g/mL =
ascorbic<SUP>=20
</SUP>acid, 100 =B5g/mL sodium pyruvate, 40 =B5g/mL proline<SUP>=20
</SUP>(Sigma-Aldrich), and ITS Premix (BD Biosciences, San Jose, =
CA)<SUP>=20
</SUP>for 3 weeks. The medium was changed every 3 days. Cells =
treated<SUP>=20
</SUP>postadipogenic induction was stained with oil red-O solution<SUP>=20
</SUP>(Sigma-Aldrich) to reveal adipogenic differentiation. To =
assess<SUP>=20
</SUP>osteogenic differentiation and mineralization, cells were =
stained<SUP>=20
</SUP>with alkaline phosphatase staining (Sigma-Aldrich) and von =
Kossa<SUP>=20
</SUP>staining (Newcomer Supply, Middleton, WI). =
Immunohistochemical<SUP>=20
</SUP>staining for collagen type II (Lab Vision Corp., Fremont, CA)<SUP> =

</SUP>was used to assess the chondrogenic differentiation.<SUP> </SUP>
<P><EM>Semiquantitative and Real-time Quantitative=20
RT-PCR</EM><BR>Semiquantitative and real-time quantitative RT-PCR was =
done<SUP>=20
</SUP>to verify transcripts of multiple cell lineages in tested =
samples.<SUP>=20
</SUP>The specific primers were designed from published sequence of<SUP> =

</SUP>mRNA (3'-untranslated region; National Center for =
Biotechnology<SUP>=20
</SUP>Information). The Primer 3 Input (primer3_www.cgi v 0.2) was<SUP>=20
</SUP>used to selected primers, and nonredundant specific primer =
sequences<SUP>=20
</SUP>were verified using BLAST Search Genome (<A=20
href=3D"http://genome.ucsc.edu/">http://genome.ucsc.edu/</A>)<SUP> =
</SUP>and=20
National Center for Biotechnology Information BLAST (<A=20
href=3D"http://www.ncbi.nlm.nih.gov/blast/Blast.cgi">http://www.ncbi.nlm.=
nih.gov/blast/Blast.cgi</A>).<SUP>=20
</SUP>The primer sequences and expected size of amplified PCR =
products<SUP>=20
</SUP>are listed in Supplementary Table S2. All RNA samples were =
digested<SUP>=20
</SUP>with DNase I (Ambion, Inc., Austin, TX) that free off RNase<SUP>=20
</SUP>before reverse transcription. Total RNA (2 =B5g) was used<SUP> =
</SUP>as a=20
template for RT-PCR. cDNA synthesis was done for 1 cycle<SUP> </SUP>at =
50=B0C for=20
30 minutes and 94=B0C for 2 minutes, and PCR<SUP> </SUP>amplification =
was carried=20
out for 30 cycles [50=B0C for 2<SUP> </SUP>minutes and 95=B0C for 10 =
minutes (94=B0C=20
for 15 seconds,<SUP> </SUP>58-61=B0C for 1 minute, and 72=B0C for 1 =
minute) <FONT=20
face=3Darial,helvetica>x</FONT> 30 cycles].<SUP> </SUP>After =
amplification, each=20
reaction product (5 =B5L) was<SUP> </SUP>analyzed by 2% agarose gel=20
electrophoresis, and the bands were<SUP> </SUP>then visualized by SYBR =
Green=20
staining. The specificity of the<SUP> </SUP>selected PCR products was =
confirmed=20
by sequencing. Real-time<SUP> </SUP>PCR was done to amplify =
tissue-specific=20
transcripts and was<SUP> </SUP>carried out with MJ Opticon PCR Analyzer =
(MJ=20
Research, Inc.,<SUP> </SUP>Waltham, MA) using SYBR Green PCR Core =
Reagents=20
(Applied Biosystems,<SUP> </SUP>Foster City, CA). The reactions were =
cycled 30=20
times [50=B0C<SUP> </SUP>for 2 minutes and 95=B0C for 10 minutes (94=B0C =
for 15=20
seconds,<SUP> </SUP>60=B0C for 1 minute, and 72=B0C for 1 minute) <FONT=20
face=3Darial,helvetica>x</FONT> 30 cycles]<SUP> </SUP>and the =
fluorescence was=20
measured at the end of each cycle to<SUP> </SUP>construct amplification =
curves.=20
A melting curve was done to<SUP> </SUP>verify the specificity of PCR =
products.=20
Quantitation of transcripts<SUP> </SUP>was calculated based on a =
titrated=20
standard curve co-run in<SUP> </SUP>the same experiment and calibrated =
with the=20
expression level<SUP> </SUP>of housekeeping gene. All determinations =
were done=20
in duplicate.<SUP> </SUP>The following tissue-specific oliogonucleotides =
were=20
used: fatty<SUP> </SUP>acid=96binding protein 4 (210 bp) sense=20
5'-AAGTCAAGAGCACCATAACCTTAGA-3'<SUP> </SUP>and antisense=20
5'-TGGCTTATGCTCTCTCATAAACTCT-3', alkaline phosphatase<SUP> </SUP>(236 =
bp) sense=20
5-GAGTACAGACTGCAGACATTCTCAA-3' and antisense<SUP>=20
</SUP>5'-GTCCTGAGGAGAA-AGACCTCAAC-3', and collagen type II, <IMG =
alt=3D{alpha}=20
src=3D"http://mcr.aacrjournals.org/math/alpha.gif" border=3D0>1 =
(224<SUP> </SUP>bp)=20
sense 5'-CTTTCCAATCTCAGTCACTCTAGGA-3' and antisense=20
5'-ATTTGACTCACACCAGTTAGTTTCC.<SUP> </SUP>
<P><EM>Accession Numbers</EM><BR>The expression microarray and single =
nucleotide=20
polymorphism<SUP> </SUP>array data have been submitted to the Gene =
Expression=20
Omnibus<SUP> </SUP>database at <A=20
href=3D"http://www.ncbi.nlm.nih.gov/projects/geo/">http://www.ncbi.nlm.ni=
h.gov/projects/geo/</A>.=20
The accession<SUP> </SUP>number for expression microarray is GSE5107<!-- =
HIGHWIRE EXLINK_ID=3D"4:9:607:1" VALUE=3D"GSE5107" TYPEGUESS=3D"NCBIGEO" =
--><!-- /HIGHWIRE -->=20
and the accession<SUP> </SUP>number for single nucleotide polymorphism=20
expression microarray<SUP> </SUP>is GSE5082<!-- HIGHWIRE =
EXLINK_ID=3D"4:9:607:2" VALUE=3D"GSE5082" TYPEGUESS=3D"NCBIGEO" --><!-- =
/HIGHWIRE -->.<SUP>=20
</SUP>
<P><A name=3DACK><!-- null --></A><BR clear=3Dright>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"100%" bgColor=3D#e1e1e1>
  <TBODY>
  <TR>
    <TD vAlign=3Dcenter align=3Dleft width=3D"5%" bgColor=3D#ffffff><IMG =
height=3D21=20
      alt=3D" " hspace=3D5 =
src=3D"http://mcr.aacrjournals.org/icons/toc/rarrow.gif"=20
      width=3D10></TD>
    <TH vAlign=3Dcenter align=3Dleft width=3D"95%"><FONT =
size=3D+2>&nbsp;&nbsp;=20
      Acknowledgements </FONT></TH></TR></TBODY></TABLE>
<TABLE cellPadding=3D5 align=3Dright border=3D1>
  <TBODY>
  <TR>
    <TH align=3Dleft><FONT size=3D-1><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#top"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Top<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FN"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Notes<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#ABS"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Abstract<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC1"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Introduction<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC2"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Results<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC3"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Discussion<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC4"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Materials and Methods<BR></A><IMG height=3D9 alt=3D" " =
hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/dot.gif" width=3D11=20
      border=3D0><FONT color=3D#464c53>Acknowledgements</FONT><BR><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIBL"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      =
border=3D0>References<BR></A></FONT></TH></TR></TBODY></TABLE>&nbsp;<BR>W=
e thank=20
Harley Kornblum and Daniel H. Geschwind for useful<SUP> </SUP>comments =
and the=20
patients who participated in this study.<SUP> </SUP>
<P><A name=3DFN><!-- null --></A><BR clear=3Dright>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"100%" bgColor=3D#e1e1e1>
  <TBODY>
  <TR>
    <TD vAlign=3Dcenter align=3Dleft width=3D"5%" bgColor=3D#ffffff><IMG =
height=3D21=20
      alt=3D" " hspace=3D5 =
src=3D"http://mcr.aacrjournals.org/icons/toc/rarrow.gif"=20
      width=3D10></TD>
    <TH vAlign=3Dcenter align=3Dleft width=3D"95%"><FONT =
size=3D+2>&nbsp;&nbsp; Notes=20
      </FONT></TH></TR></TBODY></TABLE>
<TABLE cellPadding=3D5 align=3Dright border=3D1>
  <TBODY>
  <TR>
    <TH align=3Dleft><FONT size=3D-1><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#top"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Top<BR></A><IMG height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/dot.gif" width=3D11=20
      border=3D0><FONT color=3D#464c53>Notes</FONT><BR><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#ABS"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Abstract<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC1"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Introduction<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC2"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Results<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC3"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Discussion<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC4"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Materials and Methods<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#ACK"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Acknowledgements<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#BIBL"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      =
border=3D0>References<BR></A></FONT></TH></TR></TBODY></TABLE>&nbsp;<BR><=
A=20
name=3D""><!-- null --></A><B>Grant support:</B> National Cancer =
Institute grant=20
U01CA88173, Accelerate<SUP> </SUP>Brain Cancer Cure, the Henry Singleton =
Brain=20
Tumor Program,<SUP> </SUP>and UCLA Jonsson Comprehensive Cancer Center =
seed=20
grant.<SUP> </SUP>
<P><A name=3D""><!-- null --></A>The costs of publication of this =
article were=20
defrayed in part<SUP> </SUP>by the payment of page charges. This article =
must=20
therefore<SUP> </SUP>be hereby marked advertisement in accordance with =
18=20
U.S.C.<SUP> </SUP>Section 1734 solely to indicate this fact.<SUP> </SUP>
<P><A name=3D""><!-- null --></A><B>Note:</B> Supplementary data for =
this article=20
are available at Molecular<SUP> </SUP>Cancer Research Online (<A=20
href=3D"http://mcr.aacrjournals.org/">http://mcr.aacrjournals.org/</A>).<=
SUP>=20
</SUP>
<P><A name=3DFN1><!-- null --></A><SUP>7</SUP> Unpublished data.<SUP> =
</SUP><A=20
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#RFN1"><IMG =
height=3D12=20
alt=3DBack src=3D"http://mcr.aacrjournals.org/icons/back.gif" width=3D12 =
border=3D0></A>
<P>Received 1/ 9/06; revised 6/21/06; accepted 6/26/06.
<P><A name=3DBIBL><!-- null --></A><BR clear=3Dright>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"100%" bgColor=3D#e1e1e1>
  <TBODY>
  <TR>
    <TD vAlign=3Dcenter align=3Dleft width=3D"5%" bgColor=3D#ffffff><IMG =
height=3D21=20
      alt=3D" " hspace=3D5 =
src=3D"http://mcr.aacrjournals.org/icons/toc/rarrow.gif"=20
      width=3D10></TD>
    <TH vAlign=3Dcenter align=3Dleft width=3D"95%"><FONT =
size=3D+2>&nbsp;&nbsp;=20
      References </FONT></TH></TR></TBODY></TABLE>
<TABLE cellPadding=3D5 align=3Dright border=3D1>
  <TBODY>
  <TR>
    <TH align=3Dleft><FONT size=3D-1><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#top"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Top<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#FN"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Notes<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#ABS"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Abstract<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC1"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Introduction<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC2"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Results<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC3"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Discussion<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#SEC4"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Materials and Methods<BR></A><A=20
      =
href=3D"http://mcr.aacrjournals.org/cgi/content/full/4/9/607#ACK"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Acknowledgements<BR></A><IMG height=3D9 alt=3D" " =
hspace=3D5=20
      src=3D"http://mcr.aacrjournals.org/icons/toc/dot.gif" width=3D11=20
      border=3D0><FONT=20
color=3D#464c53>References</FONT><BR></FONT></TH></TR></TBODY></TABLE>&nb=
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gQM4gAsOYAABLCCACkyAARvwQE8c2IRIACBwAnPZBQSCw81MQAmlwIAE+nEGGxUHTQy4AGS6sIAw
aIAjB6DONCSwlMCZRAMH2JsE5ZaodnHvArTIwBUGQZppC7CmAP9KFAYiIQAPGmoBIcngBnu4QASU
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nBnWAer2yVohIEGlTKUqV8nKVrqSciEAADs=

------=_NextPart_000_00DF_01C8F646.47BE8130
Content-Type: application/octet-stream
Content-Transfer-Encoding: quoted-printable
Content-Location: http://mcr.aacrjournals.org/javascript/ajax/xmlhttprequest.js

/*=0A=
=0A=
Cross-Browser XMLHttpRequest v1.2=0A=
=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=3D=
=3D=3D=3D=3D=3D=3D=3D=3D=0A=
=0A=
Emulate Gecko 'XMLHttpRequest()' functionality in IE and Opera. Opera =
requires=0A=
the Sun Java Runtime Environment <http://www.java.com/>.=0A=
=0A=
by Andrew Gregory=0A=
http://www.scss.com.au/family/andrew/webdesign/xmlhttprequest/=0A=
=0A=
This work is licensed under the Creative Commons Attribution License. To =
view a=0A=
copy of this license, visit =
http://creativecommons.org/licenses/by-sa/2.5/ or=0A=
send a letter to Creative Commons, 559 Nathan Abbott Way, Stanford, =
California=0A=
94305, USA.=0A=
=0A=
Attribution: Leave my name and web address in this script intact.=0A=
=0A=
Not Supported in Opera=0A=
----------------------=0A=
* user/password authentication=0A=
* responseXML data member=0A=
=0A=
Not Fully Supported in Opera=0A=
----------------------------=0A=
* async requests=0A=
* abort()=0A=
* getAllResponseHeaders(), getAllResponseHeader(header)=0A=
=0A=
*/=0A=
// IE support=0A=
if (window.ActiveXObject && !window.XMLHttpRequest) {=0A=
  window.XMLHttpRequest =3D function() {=0A=
    var msxmls =3D new Array(=0A=
      'Msxml2.XMLHTTP.5.0',=0A=
      'Msxml2.XMLHTTP.4.0',=0A=
      'Msxml2.XMLHTTP.3.0',=0A=
      'Msxml2.XMLHTTP',=0A=
      'Microsoft.XMLHTTP');=0A=
    for (var i =3D 0; i < msxmls.length; i++) {=0A=
      try {=0A=
        return new ActiveXObject(msxmls[i]);=0A=
      } catch (e) {=0A=
      }=0A=
    }=0A=
    return null;=0A=
  };=0A=
}=0A=
// Gecko support=0A=
/* ;-) */=0A=
// Opera support=0A=
if (window.opera && !window.XMLHttpRequest) {=0A=
  window.XMLHttpRequest =3D function() {=0A=
    this.readyState =3D 0; // =
0=3Duninitialized,1=3Dloading,2=3Dloaded,3=3Dinteractive,4=3Dcomplete=0A=
    this.status =3D 0; // HTTP status codes=0A=
    this.statusText =3D '';=0A=
    this._headers =3D [];=0A=
    this._aborted =3D false;=0A=
    this._async =3D true;=0A=
    this._defaultCharset =3D 'ISO-8859-1';=0A=
    this._getCharset =3D function() {=0A=
      var charset =3D _defaultCharset;=0A=
      var contentType =3D =
this.getResponseHeader('Content-type').toUpperCase();=0A=
      val =3D contentType.indexOf('CHARSET=3D');=0A=
      if (val !=3D -1) {=0A=
        charset =3D contentType.substring(val);=0A=
      }=0A=
      val =3D charset.indexOf(';');=0A=
      if (val !=3D -1) {=0A=
        charset =3D charset.substring(0, val);=0A=
      }=0A=
      val =3D charset.indexOf(',');=0A=
      if (val !=3D -1) {=0A=
        charset =3D charset.substring(0, val);=0A=
      }=0A=
      return charset;=0A=
    };=0A=
    this.abort =3D function() {=0A=
      this._aborted =3D true;=0A=
    };=0A=
    this.getAllResponseHeaders =3D function() {=0A=
      return this.getAllResponseHeader('*');=0A=
    };=0A=
    this.getAllResponseHeader =3D function(header) {=0A=
      var ret =3D '';=0A=
      for (var i =3D 0; i < this._headers.length; i++) {=0A=
        if (header =3D=3D '*' || this._headers[i].h =3D=3D header) {=0A=
          ret +=3D this._headers[i].h + ': ' + this._headers[i].v + '\n';=0A=
        }=0A=
      }=0A=
      return ret;=0A=
    };=0A=
    this.getResponseHeader =3D function(header) {=0A=
      var ret =3D getAllResponseHeader(header);=0A=
      var i =3D ret.indexOf('\n');=0A=
      if (i !=3D -1) {=0A=
        ret =3D ret.substring(0, i);=0A=
      }=0A=
      return ret;=0A=
    };=0A=
    this.setRequestHeader =3D function(header, value) {=0A=
      this._headers[this._headers.length] =3D {h:header, v:value};=0A=
    };=0A=
    this.open =3D function(method, url, async, user, password) {=0A=
      this.method =3D method;=0A=
      this.url =3D url;=0A=
      this._async =3D true;=0A=
      this._aborted =3D false;=0A=
      this._headers =3D [];=0A=
      if (arguments.length >=3D 3) {=0A=
        this._async =3D async;=0A=
      }=0A=
      if (arguments.length > 3) {=0A=
        opera.postError('XMLHttpRequest.open() - user/password not =
supported');=0A=
      }=0A=
      this.readyState =3D 1;=0A=
      if (this.onreadystatechange) {=0A=
        this.onreadystatechange();=0A=
      }=0A=
    };=0A=
    this.send =3D function(data) {=0A=
      if (!navigator.javaEnabled()) {=0A=
        alert("XMLHttpRequest.send() - Java must be installed and =
enabled.");=0A=
        return;=0A=
      }=0A=
      if (this._async) {=0A=
        setTimeout(this._sendasync, 0, this, data);=0A=
        // this is not really asynchronous and won't execute until the =
current=0A=
        // execution context ends=0A=
      } else {=0A=
        this._sendsync(data);=0A=
      }=0A=
    }=0A=
    this._sendasync =3D function(req, data) {=0A=
      if (!req._aborted) {=0A=
        req._sendsync(data);=0A=
      }=0A=
    };=0A=
    this._sendsync =3D function(data) {=0A=
      this.readyState =3D 2;=0A=
      if (this.onreadystatechange) {=0A=
        this.onreadystatechange();=0A=
      }=0A=
      // open connection=0A=
      var url =3D new java.net.URL(new =
java.net.URL(window.location.href), this.url);=0A=
      var conn =3D url.openConnection();=0A=
      for (var i =3D 0; i < this._headers.length; i++) {=0A=
        conn.setRequestProperty(this._headers[i].h, this._headers[i].v);=0A=
      }=0A=
      this._headers =3D [];=0A=
      if (this.method =3D=3D 'POST') {=0A=
        // POST data=0A=
        conn.setDoOutput(true);=0A=
        var wr =3D new =
java.io.OutputStreamWriter(conn.getOutputStream(), this._getCharset());=0A=
        wr.write(data);=0A=
        wr.flush();=0A=
        wr.close();=0A=
      }=0A=
      // read response headers=0A=
      // NOTE: the getHeaderField() methods always return nulls for me :(=0A=
      var gotContentEncoding =3D false;=0A=
      var gotContentLength =3D false;=0A=
      var gotContentType =3D false;=0A=
      var gotDate =3D false;=0A=
      var gotExpiration =3D false;=0A=
      var gotLastModified =3D false;=0A=
      for (var i =3D 0; ; i++) {=0A=
        var hdrName =3D conn.getHeaderFieldKey(i);=0A=
        var hdrValue =3D conn.getHeaderField(i);=0A=
        if (hdrName =3D=3D null && hdrValue =3D=3D null) {=0A=
          break;=0A=
        }=0A=
        if (hdrName !=3D null) {=0A=
          this._headers[this._headers.length] =3D {h:hdrName, =
v:hdrValue};=0A=
          switch (hdrName.toLowerCase()) {=0A=
            case 'content-encoding': gotContentEncoding =3D true; break;=0A=
            case 'content-length'  : gotContentLength   =3D true; break;=0A=
            case 'content-type'    : gotContentType     =3D true; break;=0A=
            case 'date'            : gotDate            =3D true; break;=0A=
            case 'expires'         : gotExpiration      =3D true; break;=0A=
            case 'last-modified'   : gotLastModified    =3D true; break;=0A=
          }=0A=
        }=0A=
      }=0A=
      // try to fill in any missing header information=0A=
      var val;=0A=
      val =3D conn.getContentEncoding();=0A=
      if (val !=3D null && !gotContentEncoding) =
this._headers[this._headers.length] =3D {h:'Content-encoding', v:val};=0A=
      val =3D conn.getContentLength();=0A=
      if (val !=3D -1 && !gotContentLength) =
this._headers[this._headers.length] =3D {h:'Content-length', v:val};=0A=
      val =3D conn.getContentType();=0A=
      if (val !=3D null && !gotContentType) =
this._headers[this._headers.length] =3D {h:'Content-type', v:val};=0A=
      val =3D conn.getDate();=0A=
      if (val !=3D 0 && !gotDate) this._headers[this._headers.length] =
=3D {h:'Date', v:(new Date(val)).toUTCString()};=0A=
      val =3D conn.getExpiration();=0A=
      if (val !=3D 0 && !gotExpiration) =
this._headers[this._headers.length] =3D {h:'Expires', v:(new =
Date(val)).toUTCString()};=0A=
      val =3D conn.getLastModified();=0A=
      if (val !=3D 0 && !gotLastModified) =
this._headers[this._headers.length] =3D {h:'Last-modified', v:(new =
Date(val)).toUTCString()};=0A=
      // read response data=0A=
      var reqdata =3D '';=0A=
      var stream =3D conn.getInputStream();=0A=
      if (stream) {=0A=
        var reader =3D new java.io.BufferedReader(new =
java.io.InputStreamReader(stream, this._getCharset()));=0A=
        var line;=0A=
        while ((line =3D reader.readLine()) !=3D null) {=0A=
          if (this.readyState =3D=3D 2) {=0A=
            this.readyState =3D 3;=0A=
            if (this.onreadystatechange) {=0A=
              this.onreadystatechange();=0A=
            }=0A=
          }=0A=
          reqdata +=3D line + '\n';=0A=
        }=0A=
        reader.close();=0A=
        this.status =3D 200;=0A=
        this.statusText =3D 'OK';=0A=
        this.responseText =3D reqdata;=0A=
        this.readyState =3D 4;=0A=
        if (this.onreadystatechange) {=0A=
          this.onreadystatechange();=0A=
        }=0A=
        if (this.onload) {=0A=
          this.onload();=0A=
        }=0A=
      } else {=0A=
        // error=0A=
        this.status =3D 404;=0A=
        this.statusText =3D 'Not Found';=0A=
        this.responseText =3D '';=0A=
        this.readyState =3D 4;=0A=
        if (this.onreadystatechange) {=0A=
          this.onreadystatechange();=0A=
        }=0A=
        if (this.onerror) {=0A=
          this.onerror();=0A=
        }=0A=
      }=0A=
    };=0A=
  };=0A=
}=0A=
// ActiveXObject emulation=0A=
if (!window.ActiveXObject && window.XMLHttpRequest) {=0A=
  window.ActiveXObject =3D function(type) {=0A=
    switch (type.toLowerCase()) {=0A=
      case 'microsoft.xmlhttp':=0A=
      case 'msxml2.xmlhttp':=0A=
      case 'msxml2.xmlhttp.3.0':=0A=
      case 'msxml2.xmlhttp.4.0':=0A=
      case 'msxml2.xmlhttp.5.0':=0A=
        return new XMLHttpRequest();=0A=
    }=0A=
    return null;=0A=
  };=0A=
}=0A=

------=_NextPart_000_00DF_01C8F646.47BE8130
Content-Type: application/octet-stream
Content-Transfer-Encoding: quoted-printable
Content-Location: http://mcr.aacrjournals.org/javascript/ajax/utility.js

/************************************************************************=
*****=0A=
 * javascript/ajax/utility.js=0A=
 *=0A=
 * Utility functions for working with XMLHttpRequest data.=0A=
 *=0A=
 * Copyright 2006 Board of Trustees of the Leland Stanford Junior =
University.=0A=
 =
*************************************************************************=
***/=0A=
=0A=
/*=0A=
 * Copy XML nodes into an HTMLElement. This effectively=0A=
 * clones XML markup which uses XHTML naming conventions=0A=
 * into an HTML DOM.=0A=
 */=0A=
function copy_xml_to_html(src, dst) {=0A=
  if (src.nodeType =3D=3D 1) { /* Node.ELEMENT_NODE */=0A=
    var e =3D document.createElement(src.nodeName);=0A=
    for (var i =3D 0; i < src.childNodes.length; i++) {=0A=
	  copy_xml_to_html(src.childNodes[i], e);=0A=
    }=0A=
    for (var i =3D 0; i < src.attributes.length; i++) {=0A=
      var n =3D src.attributes[i].name;=0A=
      var v =3D unescape_xml_string(src.attributes[i].value);      =0A=
      e.setAttribute(n, v);=0A=
      if (n =3D=3D "class") {=0A=
        e.className =3D v;=0A=
      }=0A=
      else if (n =3D=3D "style") {=0A=
        set_css_style(v, e, "");=0A=
      }=0A=
    }=0A=
    dst.appendChild(e);=0A=
  }=0A=
  else if (src.nodeType =3D=3D 3) { /* Node.TEXT_NODE */=0A=
    dst.appendChild(document.createTextNode(src.nodeValue));=0A=
  }=0A=
}=0A=
=0A=
/* =0A=
 * It is unclear that this is the right thing to be calling=0A=
 * from copy_xml_to_html, but it appears that Safari decides=0A=
 * to convert &amp; to the NCR &#35;, and then encodes that=0A=
 * NCR to &%26%2338;.  So, I'm going to treat the DOM Attr=0A=
 * value as a plain string, and run our XML string input=0A=
 * through the decoding routine below.=0A=
 */=0A=
function unescape_xml_string(s) {=0A=
  return s.replace(/&apos;/g, "'")=0A=
          .replace(/&#39;/g,  "'")=0A=
          .replace(/&quot;/g, "\"")=0A=
          .replace(/&#34;/g,  "\"")=0A=
          .replace(/&gt;/g,   ">")=0A=
          .replace(/&#62;/g,  ">")=0A=
          .replace(/&lt;/g,   "<")=0A=
          .replace(/&#60;/g,  "<")=0A=
          .replace(/&amp;/g,  "&")=0A=
          .replace(/&#38;/g,  "&");=0A=
}=0A=
=0A=
/*=0A=
 * Parse set of CSS rules and apply them to an element.=0A=
 * This is quite horrifying, but I'm unable to determine=0A=
 * how else to handle this with IE 6.  FireFox and other=0A=
 * sane browsers let you simply set the style attribute=0A=
 * or use e.style.setProperty(rule, value, priority),=0A=
 * IE 6 appears to have neither of these capabilities..=0A=
 */=0A=
function set_css_style(css, e, priority) {=0A=
  var rules =3D css.split(";");=0A=
  for (var i =3D 0; i < rules.length; i++) {=0A=
    var nvpair =3D rules[i].split(":");=0A=
    if (nvpair.length =3D=3D 2) {=0A=
      try {=0A=
        var name  =3D nvpair[0]; /* style attribute */=0A=
        var value =3D nvpair[1]; /* attribute value */=0A=
  =0A=
        /*=0A=
         * For each possible style attribute, set the=0A=
         * appropriate style property in the element.=0A=
         */=0A=
        if (name =3D=3D "background") {=0A=
           e.style.background =3D value;=0A=
        }=0A=
        else if (name =3D=3D "background-attachment") {=0A=
          e.style.backgroundAttachment =3D value;=0A=
        }=0A=
        else if (name =3D=3D "background-color") {=0A=
          e.style.backgroundColor =3D value;=0A=
        }=0A=
        else if (name =3D=3D "background-image") {=0A=
          e.style.backgroundImage =3D value;=0A=
        }=0A=
        else if (name =3D=3D "background-position") {=0A=
          e.style.backgroundPosition =3D value;=0A=
        }=0A=
        else if (name =3D=3D "background-position-x") {=0A=
          e.style.backgroundPositionX =3D value;=0A=
        }=0A=
        else if (name =3D=3D "background-position-y") {=0A=
          e.style.backgroundPositionY =3D value;=0A=
        }=0A=
        else if (name =3D=3D "background-repeat") {=0A=
          e.style.backgroundRepeat =3D value;=0A=
        }=0A=
        else if (name =3D=3D "behavior") {=0A=
          e.style.behavior =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border") {=0A=
          e.style.border =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-bottom") {=0A=
          e.style.borderBottom =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-bottom-color") {=0A=
          e.style.borderBottomColor =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-bottom-style") {=0A=
          e.style.borderBottomStyle =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-bottom-width") {=0A=
          e.style.borderBottomWidth =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-collapse") {=0A=
          e.style.borderCollapse =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-color") {=0A=
          e.style.borderColor =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-left") {=0A=
          e.style.borderLeft =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-left-color") {=0A=
          e.style.borderLeftColor =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-left-style") {=0A=
          e.style.borderLeftStyle =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-left-width") {=0A=
          e.style.borderLeftWidth =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-right") {=0A=
          e.style.borderRight =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-right-color") {=0A=
          e.style.borderRightColor =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-right-style") {=0A=
          e.style.borderRightStyle =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-right-width") {=0A=
          e.style.borderRightWidth =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-style") {=0A=
          e.style.borderStyle =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-top") {=0A=
          e.style.borderTop =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-top-color") {=0A=
          e.style.borderTopColor =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-top-style") {=0A=
          e.style.borderTopStyle =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-top-width") {=0A=
          e.style.borderTopWidth =3D value;=0A=
        }=0A=
        else if (name =3D=3D "border-width") {=0A=
          e.style.borderWidth =3D value;=0A=
        }=0A=
        else if (name =3D=3D "bottom") {=0A=
          e.style.bottom =3D value;=0A=
        }=0A=
        else if (name =3D=3D "clear") {=0A=
          e.style.clear =3D value;=0A=
        }=0A=
        else if (name =3D=3D "clip") {=0A=
          e.style.clip =3D value;=0A=
        }=0A=
        else if (name =3D=3D "color") {=0A=
          e.style.color =3D value;=0A=
        }=0A=
        else if (name =3D=3D "cssText") {=0A=
          e.style.Sets =3D value;=0A=
        }=0A=
        else if (name =3D=3D "cursor") {=0A=
          e.style.cursor =3D value;=0A=
        }=0A=
        else if (name =3D=3D "direction") {=0A=
          e.style.direction =3D value;=0A=
        }=0A=
        else if (name =3D=3D "display") {=0A=
          e.style.display =3D value;=0A=
        }=0A=
        else if (name =3D=3D "font") {=0A=
          e.style.font =3D value;=0A=
        }=0A=
        else if (name =3D=3D "font-family") {=0A=
          e.style.fontFamily =3D value;=0A=
        }=0A=
        else if (name =3D=3D "font-size") {=0A=
          e.style.fontSize =3D value;=0A=
        }=0A=
        else if (name =3D=3D "font-style") {=0A=
          e.style.fontStyle =3D value;=0A=
        }=0A=
        else if (name =3D=3D "font-variant") {=0A=
          e.style.fontVariant =3D value;=0A=
        }=0A=
        else if (name =3D=3D "font-weight") {=0A=
          e.style.fontWeight =3D value;=0A=
        }=0A=
        else if (name =3D=3D "height") {=0A=
          e.style.height =3D value;=0A=
        }=0A=
        else if (name =3D=3D "ime-mode") {=0A=
          e.style.imeMode =3D value;=0A=
        }=0A=
        else if (name =3D=3D "layout-flow") {=0A=
          e.style.layoutFlow =3D value;=0A=
        }=0A=
        else if (name =3D=3D "layout-grid") {=0A=
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------=_NextPart_000_00DF_01C8F646.47BE8130
Content-Type: application/octet-stream
Content-Transfer-Encoding: quoted-printable
Content-Location: http://mcr.aacrjournals.org/javascript/entrez/callback.js

/************************************************************************=
*****=0A=
 * javascript/entrez/callback.js=0A=
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 * Entrez Linking callback to populate content box.=0A=
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 * Copyright 2006 Board of Trustees of the Leland Stanford Junior =
University.=0A=
 =
*************************************************************************=
***/=0A=
=0A=
/*=0A=
 * Execute callback to fill content box with Entrez Linking information.=0A=
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function entrez_callback(pmid, callback_url) {=0A=
  /*=0A=
   * MSIE 5.5 and below have issues with the JavaScript=0A=
   * used for Entrez Linking. For now we have to disable=0A=
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   * Acquire table row element to update, initiate callback=0A=
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------=_NextPart_000_00DF_01C8F646.47BE8130
Content-Type: application/octet-stream
Content-Transfer-Encoding: quoted-printable
Content-Location: http://www.google-analytics.com/urchin.js

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var _uacct=3D"";			// set up the Urchin Account=0A=
var _userv=3D1;			// service mode (0=3Dlocal,1=3Dremote,2=3Dboth)=0A=
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var _ufsc=3D1;			// set client info flag (1=3Don|0=3Doff)=0A=
var _udn=3D"auto";		// (auto|none|domain) set the domain name for cookies=0A=
var _uhash=3D"on";		// (on|off) unique domain hash for cookies=0A=
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var _uflash=3D1;			// set flash version detect option (1=3Don|0=3Doff)=0A=
var _utitle=3D1;			// set the document title detect option =
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var _ulink=3D0;			// enable linker functionality (1=3Don|0=3Doff)=0A=
var _uanchor=3D0;			// enable use of anchors for campaign =
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var _utcp=3D"/";			// the cookie path for tracking=0A=
var _usample=3D100;		// The sampling % of visitors to track (1-100).=0A=
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var _uctr=3D"utm_term";		// term/keyword=0A=
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_uOsr[1]=3D"yahoo";	_uOkw[1]=3D"p";=0A=
_uOsr[2]=3D"msn";		_uOkw[2]=3D"q";=0A=
_uOsr[3]=3D"aol";		_uOkw[3]=3D"query";=0A=
_uOsr[4]=3D"aol";		_uOkw[4]=3D"encquery";=0A=
_uOsr[5]=3D"lycos";	_uOkw[5]=3D"query";=0A=
_uOsr[6]=3D"ask";		_uOkw[6]=3D"q";=0A=
_uOsr[7]=3D"altavista";	_uOkw[7]=3D"q";=0A=
_uOsr[8]=3D"netscape";	_uOkw[8]=3D"query";=0A=
_uOsr[9]=3D"cnn";	_uOkw[9]=3D"query";=0A=
_uOsr[10]=3D"looksmart";	_uOkw[10]=3D"qt";=0A=
_uOsr[11]=3D"about";	_uOkw[11]=3D"terms";=0A=
_uOsr[12]=3D"mamma";	_uOkw[12]=3D"query";=0A=
_uOsr[13]=3D"alltheweb";	_uOkw[13]=3D"q";=0A=
_uOsr[14]=3D"gigablast";	_uOkw[14]=3D"q";=0A=
_uOsr[15]=3D"voila";	_uOkw[15]=3D"rdata";=0A=
_uOsr[16]=3D"virgilio";	_uOkw[16]=3D"qs";=0A=
_uOsr[17]=3D"live";	_uOkw[17]=3D"q";=0A=
_uOsr[18]=3D"baidu";	_uOkw[18]=3D"wd";=0A=
_uOsr[19]=3D"alice";	_uOkw[19]=3D"qs";=0A=
_uOsr[20]=3D"yandex";	_uOkw[20]=3D"text";=0A=
_uOsr[21]=3D"najdi";	_uOkw[21]=3D"q";=0A=
_uOsr[22]=3D"aol";	_uOkw[22]=3D"q";=0A=
_uOsr[23]=3D"club-internet"; _uOkw[23]=3D"query";=0A=
_uOsr[24]=3D"mama";	_uOkw[24]=3D"query";=0A=
_uOsr[25]=3D"seznam";	_uOkw[25]=3D"q";=0A=
_uOsr[26]=3D"search";	_uOkw[26]=3D"q";=0A=
_uOsr[27]=3D"wp";	_uOkw[27]=3D"szukaj";=0A=
_uOsr[28]=3D"onet";	_uOkw[28]=3D"qt";=0A=
_uOsr[29]=3D"netsprint";	_uOkw[29]=3D"q";=0A=
_uOsr[30]=3D"google.interia";	_uOkw[30]=3D"q";=0A=
_uOsr[31]=3D"szukacz";	_uOkw[31]=3D"q";=0A=
_uOsr[32]=3D"yam";	_uOkw[32]=3D"k";=0A=
_uOsr[33]=3D"pchome";	_uOkw[33]=3D"q";=0A=
_uOsr[34]=3D"kvasir";	_uOkw[34]=3D"searchExpr";=0A=
_uOsr[35]=3D"sesam";	_uOkw[35]=3D"q";=0A=
_uOsr[36]=3D"ozu"; _uOkw[36]=3D"q";=0A=
_uOsr[37]=3D"terra"; _uOkw[37]=3D"query";=0A=
_uOsr[38]=3D"nostrum"; _uOkw[38]=3D"query";=0A=
_uOsr[39]=3D"mynet"; _uOkw[39]=3D"q";=0A=
_uOsr[40]=3D"ekolay"; _uOkw[40]=3D"q";=0A=
_uOsr[41]=3D"search.ilse"; _uOkw[41]=3D"search_for";=0A=
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var _ugifpath2=3D"http://www.google-analytics.com/__utm.gif";=0A=
if (_udl.hash) _udlh=3D_udl.href.substring(_udl.href.indexOf('#'));=0A=
if (_udl.protocol=3D=3D"https:") =
_ugifpath2=3D"https://ssl.google-analytics.com/__utm.gif";=0A=
if (!_utcp || _utcp=3D=3D"") _utcp=3D"/";=0A=
function urchinTracker(page) {=0A=
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 if (_ulink) {=0A=
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   z=3D_uGC(s,"__utmz=3D","&");=0A=
   k=3D_uGC(s,"__utmk=3D","&");=0A=
   xx=3D_uGC(s,"__utmx=3D","&");=0A=
   if ((k*1) !=3D ((_uHash(a+b+c+xx+z+v)*1)+(_udh*1))) =
{_ubl=3D1;a=3D"-";b=3D"-";c=3D"-";xx=3D"-";z=3D"-";v=3D"-";}=0A=
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  _ubd.cookie=3D"__utmb=3D"+b+"; path=3D"+_utcp+";"+x+_udo;=0A=
  _ubd.cookie=3D"__utmc=3D"+c+"; path=3D"+_utcp+";"+_udo;=0A=
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  a=3D_uFixA(s,"&",_ust);=0A=
  _ubd.cookie=3D"__utma=3D"+a+"; path=3D"+_utcp+";"+nx+_udo;=0A=
  _ubd.cookie=3D"__utmb=3D"+_udh+"; path=3D"+_utcp+";"+x+_udo;=0A=
  _ubd.cookie=3D"__utmc=3D"+_udh+"; path=3D"+_utcp+";"+_udo;=0A=
  _ufns=3D1;=0A=
 } else if (a>=3D0 && b>=3D0 && c>=3D0) {=0A=
   b =3D _uGC(dc,"__utmb=3D"+_udh,";");=0A=
   b =3D ("-" =3D=3D b) ? _udh : b;  =0A=
  _ubd.cookie=3D"__utmb=3D"+b+"; path=3D"+_utcp+";"+x+_udo;=0A=
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  if (a>=3D0) a=3D_uFixA(_ubd.cookie,";",_ust);=0A=
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   a=3D_udh+"."+_uu+"."+_ust+"."+_ust+"."+_ust+".1";=0A=
   nv=3D1;=0A=
  }=0A=
  _ubd.cookie=3D"__utma=3D"+a+"; path=3D"+_utcp+";"+nx+_udo;=0A=
  _ubd.cookie=3D"__utmb=3D"+_udh+"; path=3D"+_utcp+";"+x+_udo;=0A=
  _ubd.cookie=3D"__utmc=3D"+_udh+"; path=3D"+_utcp+";"+_udo;=0A=
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 if (_ulink && xx && xx!=3D"" && xx!=3D"-") {=0A=
   xx=3D_uUES(xx);=0A=
   if (xx.indexOf(";")=3D=3D-1) _ubd.cookie=3D"__utmx=3D"+xx+"; =
path=3D"+_utcp+";"+nx+_udo;=0A=
 }=0A=
 if (_ulink && v && v!=3D"" && v!=3D"-") {=0A=
  v=3D_uUES(v);=0A=
  if (v.indexOf(";")=3D=3D-1) _ubd.cookie=3D"__utmv=3D"+v+"; =
path=3D"+_utcp+";"+nx+_udo;=0A=
 }=0A=
 var wc=3Dwindow;=0A=
 var c=3D_ubd.cookie;=0A=
 if(wc && wc.gaGlobal && wc.gaGlobal.dh=3D=3D_udh){=0A=
  var g=3Dwc.gaGlobal;=0A=
  var ua=3Dc.split("__utma=3D"+_udh+".")[1].split(";")[0].split(".");=0A=
  if(g.sid)ua[3]=3Dg.sid;=0A=
  if(nv>0){=0A=
   ua[2]=3Dua[3];=0A=
   if(g.vid){=0A=
    var v=3Dg.vid.split(".");=0A=
    ua[0]=3Dv[0];=0A=
    ua[1]=3Dv[1];=0A=
   }=0A=
  }=0A=
  _ubd.cookie=3D"__utma=3D"+_udh+"."+ua.join(".")+"; =
path=3D"+_utcp+";"+nx+_udo;=0A=
 }=0A=
 _uInfo(page);=0A=
 _ufns=3D0;=0A=
 _ufno=3D0;=0A=
 if (!page || page=3D=3D"") _uff=3D1;=0A=
}=0A=
function _uGH() {=0A=
 var hid;=0A=
 var wc=3Dwindow;=0A=
 if (wc && wc.gaGlobal && wc.gaGlobal.hid) {=0A=
  hid=3Dwc.gaGlobal.hid;=0A=
 } else {=0A=
  hid=3DMath.round(Math.random()*0x7fffffff);=0A=
  if (!wc.gaGlobal) wc.gaGlobal=3D{};=0A=
  wc.gaGlobal.hid=3Dhid;=0A=
 }=0A=
 return hid;=0A=
}=0A=
function _uInfo(page) {=0A=
 var p,s=3D"",dm=3D"",pg=3D_udl.pathname+_udl.search;=0A=
 if (page && page!=3D"") pg=3D_uES(page,1);=0A=
 _ur=3D_ubd.referrer;=0A=
 if (!_ur || _ur=3D=3D"") { _ur=3D"-"; }=0A=
 else {=0A=
  dm=3D_ubd.domain;=0A=
  if(_utcp && _utcp!=3D"/") dm+=3D_utcp;=0A=
  p=3D_ur.indexOf(dm);=0A=
  if ((p>=3D0) && (p<=3D8)) { _ur=3D"0"; }=0A=
  if (_ur.indexOf("[")=3D=3D0 && =
_ur.lastIndexOf("]")=3D=3D(_ur.length-1)) { _ur=3D"-"; }=0A=
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 if (_ufsc) s+=3D_uBInfo();=0A=
 if (_uctm) s+=3D_uCInfo();=0A=
 if (_utitle && _ubd.title && _ubd.title!=3D"") =
s+=3D"&utmdt=3D"+_uES(_ubd.title);=0A=
 if (_udl.hostname && _udl.hostname!=3D"") =
s+=3D"&utmhn=3D"+_uES(_udl.hostname);=0A=
 if (_usample && _usample !=3D 100) s+=3D"&utmsp=3D"+_uES(_usample);=0A=
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 s+=3D"&utmr=3D"+_ur;=0A=
 s+=3D"&utmp=3D"+pg;=0A=
 if ((_userv=3D=3D0 || _userv=3D=3D2) && _uSP()) {=0A=
  var i=3Dnew Image(1,1);=0A=
  i.src=3D_ugifpath+"?"+"utmwv=3D"+_uwv+s;=0A=
  i.onload=3Dfunction() { _uVoid(); }=0A=
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 if ((_userv=3D=3D1 || _userv=3D=3D2) && _uSP()) {=0A=
  var i2=3Dnew Image(1,1);=0A=
  =
i2.src=3D_ugifpath2+"?"+"utmwv=3D"+_uwv+s+"&utmac=3D"+_uacct+"&utmcc=3D"+=
_uGCS();=0A=
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 return;=0A=
}=0A=
function _uVoid() { return; }=0A=
function _uCInfo() {=0A=
 if (!_ucto || _ucto=3D=3D"") { _ucto=3D"15768000"; }=0A=
 if (!_uVG()) return;=0A=
 var =
c=3D"",t=3D"-",t2=3D"-",t3=3D"-",o=3D0,cs=3D0,cn=3D0,i=3D0,z=3D"-",s=3D""=
;=0A=
 if (_uanchor && _udlh && _udlh!=3D"") s=3D_udlh+"&";=0A=
 s+=3D_udl.search;=0A=
 var x=3Dnew Date(_udt.getTime()+(_ucto*1000));=0A=
 var dc=3D_ubd.cookie;=0A=
 x=3D" expires=3D"+x.toGMTString()+";";=0A=
 if (_ulink && !_ubl) {=0A=
  z=3D_uUES(_uGC(s,"__utmz=3D","&"));=0A=
  if (z!=3D"-" && z.indexOf(";")=3D=3D-1) { =
_ubd.cookie=3D"__utmz=3D"+z+"; path=3D"+_utcp+";"+x+_udo; return ""; }=0A=
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 z=3Ddc.indexOf("__utmz=3D"+_udh+".");=0A=
 if (z>-1) { z=3D_uGC(dc,"__utmz=3D"+_udh+".",";"); }=0A=
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 if ((t!=3D"-" && t!=3D"") || (t2!=3D"-" && t2!=3D"") || (t3!=3D"-" && =
t3!=3D"")) {=0A=
  if (t!=3D"-" && t!=3D"") c+=3D"utmcid=3D"+_uEC(t);=0A=
  if (t2!=3D"-" && t2!=3D"") { if (c !=3D "") c+=3D"|"; =
c+=3D"utmcsr=3D"+_uEC(t2); }=0A=
  if (t3!=3D"-" && t3!=3D"") { if (c !=3D "") c+=3D"|"; =
c+=3D"utmgclid=3D"+_uEC(t3); }=0A=
  t=3D_uGC(s,_uccn+"=3D","&");=0A=
  if (t!=3D"-" && t!=3D"") c+=3D"|utmccn=3D"+_uEC(t);=0A=
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  t=3D_uGC(s,_ucmd+"=3D","&");=0A=
  if (t!=3D"-" && t!=3D"") c+=3D"|utmcmd=3D"+_uEC(t);=0A=
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  t=3D_uGC(s,_uctr+"=3D","&");=0A=
  if (t!=3D"-" && t!=3D"") c+=3D"|utmctr=3D"+_uEC(t);=0A=
  else { t=3D_uOrg(1); if (t!=3D"-" && t!=3D"") =
c+=3D"|utmctr=3D"+_uEC(t); }=0A=
  t=3D_uGC(s,_ucct+"=3D","&");=0A=
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  t=3D_uGC(s,_ucno+"=3D","&");=0A=
  if (t=3D=3D"1") o=3D1;=0A=
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 if (c=3D=3D"-" || c=3D=3D"") { c=3D_uOrg(); if (z!=3D"-" && =
_ufno=3D=3D1)  return ""; }=0A=
 if (c=3D=3D"-" || c=3D=3D"") { if (_ufns=3D=3D1)  c=3D_uRef(); if =
(z!=3D"-" && _ufno=3D=3D1)  return ""; }=0A=
 if (c=3D=3D"-" || c=3D=3D"") {=0A=
  if (z=3D=3D"-" && _ufns=3D=3D1) { =
c=3D"utmccn=3D(direct)|utmcsr=3D(direct)|utmcmd=3D(none)"; }=0A=
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 }=0A=
 if (z!=3D"-") {=0A=
  i=3Dz.indexOf(".");=0A=
  if (i>-1) i=3Dz.indexOf(".",i+1);=0A=
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  t=3Dz.substring(i+1,z.length);=0A=
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  t=3Dz.substring(0,i);=0A=
  if ((i=3Dt.lastIndexOf(".")) > -1) {=0A=
   t=3Dt.substring(i+1,t.length);=0A=
   cn=3D(t*1);=0A=
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 }=0A=
 if (cs=3D=3D0 || _ufns=3D=3D1) {=0A=
  t=3D_uGC(dc,"__utma=3D"+_udh+".",";");=0A=
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   _uns=3Dt.substring(i+1,t.length);=0A=
   _uns=3D(_uns*1);=0A=
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  cn++;=0A=
  if (_uns=3D=3D0) _uns=3D1;=0A=
  _ubd.cookie=3D"__utmz=3D"+_udh+"."+_ust+"."+_uns+"."+cn+"."+c+"; =
path=3D"+_utcp+"; "+x+_udo;=0A=
 }=0A=
 if (cs=3D=3D0 || _ufns=3D=3D1) return "&utmcn=3D1";=0A=
 else return "&utmcr=3D1";=0A=
}=0A=
function _uRef() {=0A=
 if (_ur=3D=3D"0" || _ur=3D=3D"" || _ur=3D=3D"-") return "";=0A=
 var i=3D0,h,k,n;=0A=
 if ((i=3D_ur.indexOf("://"))<0 || _uGCse()) return "";=0A=
 h=3D_ur.substring(i+3,_ur.length);=0A=
 if (h.indexOf("/") > -1) {=0A=
  k=3Dh.substring(h.indexOf("/"),h.length);=0A=
  if (k.indexOf("?") > -1) k=3Dk.substring(0,k.indexOf("?"));=0A=
  h=3Dh.substring(0,h.indexOf("/"));=0A=
 }=0A=
 h=3Dh.toLowerCase();=0A=
 n=3Dh;=0A=
 if ((i=3Dn.indexOf(":")) > -1) n=3Dn.substring(0,i);=0A=
 for (var ii=3D0;ii<_uRno.length;ii++) {=0A=
  if ((i=3Dn.indexOf(_uRno[ii].toLowerCase())) > -1 && =
n.length=3D=3D(i+_uRno[ii].length)) { _ufno=3D1; break; }=0A=
 }=0A=
 if (h.indexOf("www.")=3D=3D0) h=3Dh.substring(4,h.length);=0A=
 return =
"utmccn=3D(referral)|utmcsr=3D"+_uEC(h)+"|"+"utmcct=3D"+_uEC(k)+"|utmcmd=3D=
referral";=0A=
}=0A=
function _uOrg(t) {=0A=
 if (_ur=3D=3D"0" || _ur=3D=3D"" || _ur=3D=3D"-") return "";=0A=
 var i=3D0,h,k;=0A=
 if ((i=3D_ur.indexOf("://"))<0 || _uGCse()) return "";=0A=
 h=3D_ur.substring(i+3,_ur.length);=0A=
 if (h.indexOf("/") > -1) {=0A=
  h=3Dh.substring(0,h.indexOf("/"));=0A=
 }=0A=
 for (var ii=3D0;ii<_uOsr.length;ii++) {=0A=
  if (h.toLowerCase().indexOf(_uOsr[ii].toLowerCase()) > -1) {=0A=
   if ((i=3D_ur.indexOf("?"+_uOkw[ii]+"=3D")) > -1 || =
(i=3D_ur.indexOf("&"+_uOkw[ii]+"=3D")) > -1) {=0A=
    k=3D_ur.substring(i+_uOkw[ii].length+2,_ur.length);=0A=
    if ((i=3Dk.indexOf("&")) > -1) k=3Dk.substring(0,i);=0A=
    for (var yy=3D0;yy<_uOno.length;yy++) {=0A=
     if (_uOno[yy].toLowerCase()=3D=3Dk.toLowerCase()) { _ufno=3D1; =
break; }=0A=
    }=0A=
    if (t) return _uEC(k);=0A=
    else return =
"utmccn=3D(organic)|utmcsr=3D"+_uEC(_uOsr[ii])+"|"+"utmctr=3D"+_uEC(k)+"|=
utmcmd=3Dorganic";=0A=
   }=0A=
  }=0A=
 }=0A=
 return "";=0A=
}=0A=
function _uGCse() {=0A=
 var h,p;=0A=
 h=3Dp=3D_ur.split("://")[1];=0A=
 if(h.indexOf("/")>-1) {=0A=
  h=3Dh.split("/")[0];=0A=
  p=3Dp.substring(p.indexOf("/")+1,p.length);=0A=
 }=0A=
 if(p.indexOf("?")>-1) {=0A=
  p=3Dp.split("?")[0];=0A=
 }=0A=
 if(h.toLowerCase().indexOf("google")>-1) {=0A=
  if(_ur.indexOf("?q=3D")>-1 || _ur.indexOf("&q=3D")>-1) {=0A=
   if (p.toLowerCase().indexOf("cse")>-1) {=0A=
    return true;=0A=
   }=0A=
  }=0A=
 }=0A=
}=0A=
function _uBInfo() {=0A=
 var sr=3D"-",sc=3D"-",ul=3D"-",fl=3D"-",cs=3D"-",je=3D1;=0A=
 var n=3Dnavigator;=0A=
 if (self.screen) {=0A=
  sr=3Dscreen.width+"x"+screen.height;=0A=
  sc=3Dscreen.colorDepth+"-bit";=0A=
 } else if (self.java) {=0A=
  var j=3Djava.awt.Toolkit.getDefaultToolkit();=0A=
  var s=3Dj.getScreenSize();=0A=
  sr=3Ds.width+"x"+s.height;=0A=
 }=0A=
 if (n.language) { ul=3Dn.language.toLowerCase(); }=0A=
 else if (n.browserLanguage) { ul=3Dn.browserLanguage.toLowerCase(); }=0A=
 je=3Dn.javaEnabled()?1:0;=0A=
 if (_uflash) fl=3D_uFlash();=0A=
 if (_ubd.characterSet) cs=3D_uES(_ubd.characterSet);=0A=
 else if (_ubd.charset) cs=3D_uES(_ubd.charset);=0A=
 return =
"&utmcs=3D"+cs+"&utmsr=3D"+sr+"&utmsc=3D"+sc+"&utmul=3D"+ul+"&utmje=3D"+j=
e+"&utmfl=3D"+fl;=0A=
}=0A=
function __utmSetTrans() {=0A=
 var e;=0A=
 if (_ubd.getElementById) e=3D_ubd.getElementById("utmtrans");=0A=
 else if (_ubd.utmform && _ubd.utmform.utmtrans) =
e=3D_ubd.utmform.utmtrans;=0A=
 if (!e) return;=0A=
 var l=3De.value.split("UTM:");=0A=
 var i,i2,c;=0A=
 if (_userv=3D=3D0 || _userv=3D=3D2) i=3Dnew Array();=0A=
 if (_userv=3D=3D1 || _userv=3D=3D2) { i2=3Dnew Array(); c=3D_uGCS(); }=0A=
=0A=
 for (var ii=3D0;ii<l.length;ii++) {=0A=
  l[ii]=3D_uTrim(l[ii]);=0A=
  if (l[ii].charAt(0)!=3D'T' && l[ii].charAt(0)!=3D'I') continue;=0A=
  var r=3DMath.round(Math.random()*2147483647);=0A=
  if (!_utsp || _utsp=3D=3D"") _utsp=3D"|";=0A=
  var f=3Dl[ii].split(_utsp),s=3D"";=0A=
  if (f[0].charAt(0)=3D=3D'T') {=0A=
   s=3D"&utmt=3Dtran"+"&utmn=3D"+r;=0A=
   f[1]=3D_uTrim(f[1]); if(f[1]&&f[1]!=3D"") =
s+=3D"&utmtid=3D"+_uES(f[1]);=0A=
   f[2]=3D_uTrim(f[2]); if(f[2]&&f[2]!=3D"") =
s+=3D"&utmtst=3D"+_uES(f[2]);=0A=
   f[3]=3D_uTrim(f[3]); if(f[3]&&f[3]!=3D"") =
s+=3D"&utmtto=3D"+_uES(f[3]);=0A=
   f[4]=3D_uTrim(f[4]); if(f[4]&&f[4]!=3D"") =
s+=3D"&utmttx=3D"+_uES(f[4]);=0A=
   f[5]=3D_uTrim(f[5]); if(f[5]&&f[5]!=3D"") =
s+=3D"&utmtsp=3D"+_uES(f[5]);=0A=
   f[6]=3D_uTrim(f[6]); if(f[6]&&f[6]!=3D"") =
s+=3D"&utmtci=3D"+_uES(f[6]);=0A=
   f[7]=3D_uTrim(f[7]); if(f[7]&&f[7]!=3D"") =
s+=3D"&utmtrg=3D"+_uES(f[7]);=0A=
   f[8]=3D_uTrim(f[8]); if(f[8]&&f[8]!=3D"") =
s+=3D"&utmtco=3D"+_uES(f[8]);=0A=
  } else {=0A=
   s=3D"&utmt=3Ditem"+"&utmn=3D"+r;=0A=
   f[1]=3D_uTrim(f[1]); if(f[1]&&f[1]!=3D"") =
s+=3D"&utmtid=3D"+_uES(f[1]);=0A=
   f[2]=3D_uTrim(f[2]); if(f[2]&&f[2]!=3D"") =
s+=3D"&utmipc=3D"+_uES(f[2]);=0A=
   f[3]=3D_uTrim(f[3]); if(f[3]&&f[3]!=3D"") =
s+=3D"&utmipn=3D"+_uES(f[3]);=0A=
   f[4]=3D_uTrim(f[4]); if(f[4]&&f[4]!=3D"") =
s+=3D"&utmiva=3D"+_uES(f[4]);=0A=
   f[5]=3D_uTrim(f[5]); if(f[5]&&f[5]!=3D"") =
s+=3D"&utmipr=3D"+_uES(f[5]);=0A=
   f[6]=3D_uTrim(f[6]); if(f[6]&&f[6]!=3D"") =
s+=3D"&utmiqt=3D"+_uES(f[6]);=0A=
  }=0A=
  if (_udl.hostname && _udl.hostname!=3D"") =
s+=3D"&utmhn=3D"+_uES(_udl.hostname);=0A=
  if (_usample && _usample !=3D 100) s+=3D"&utmsp=3D"+_uES(_usample);=0A=
=0A=
  if ((_userv=3D=3D0 || _userv=3D=3D2) && _uSP()) {=0A=
   i[ii]=3Dnew Image(1,1);=0A=
   i[ii].src=3D_ugifpath+"?"+"utmwv=3D"+_uwv+s;=0A=
   i[ii].onload=3Dfunction() { _uVoid(); }=0A=
  }=0A=
  if ((_userv=3D=3D1 || _userv=3D=3D2) && _uSP()) {=0A=
   i2[ii]=3Dnew Image(1,1);=0A=
   =
i2[ii].src=3D_ugifpath2+"?"+"utmwv=3D"+_uwv+s+"&utmac=3D"+_uacct+"&utmcc=3D=
"+c;=0A=
   i2[ii].onload=3Dfunction() { _uVoid(); }=0A=
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 }=0A=
 return;=0A=
}=0A=
function _uFlash() {=0A=
 var f=3D"-",n=3Dnavigator;=0A=
 if (n.plugins && n.plugins.length) {=0A=
  for (var ii=3D0;ii<n.plugins.length;ii++) {=0A=
   if (n.plugins[ii].name.indexOf('Shockwave Flash')!=3D-1) {=0A=
    f=3Dn.plugins[ii].description.split('Shockwave Flash ')[1];=0A=
    break;=0A=
   }=0A=
  }=0A=
 } else {=0A=
  var fl;=0A=
  try {=0A=
   fl =3D new ActiveXObject("ShockwaveFlash.ShockwaveFlash.7");=0A=
   f =3D fl.GetVariable("$version");=0A=
  } catch(e) {}=0A=
  if (f =3D=3D "-") {=0A=
   try {=0A=
    fl =3D new ActiveXObject("ShockwaveFlash.ShockwaveFlash.6");=0A=
    f =3D "WIN 6,0,21,0";=0A=
    fl.AllowScriptAccess =3D "always";=0A=
    f =3D fl.GetVariable("$version");=0A=
   } catch(e) {}=0A=
  }=0A=
  if (f =3D=3D "-") {=0A=
   try {=0A=
    fl =3D new ActiveXObject("ShockwaveFlash.ShockwaveFlash");=0A=
    f =3D fl.GetVariable("$version");=0A=
   } catch(e) {}=0A=
  }=0A=
  if (f !=3D "-") {=0A=
   f =3D f.split(" ")[1].split(",");=0A=
   f =3D f[0] + "." + f[1] + " r" + f[2];=0A=
  }=0A=
 }=0A=
 return f;=0A=
}=0A=
function __utmLinkerUrl(l,h) {=0A=
 var p,k,a=3D"-",b=3D"-",c=3D"-",x=3D"-",z=3D"-",v=3D"-";=0A=
 var dc=3D_ubd.cookie;=0A=
 var iq =3D l.indexOf("?");=0A=
 var ih =3D l.indexOf("#");=0A=
 var url=3Dl;=0A=
 if (dc) {=0A=
  a=3D_uES(_uGC(dc,"__utma=3D"+_udh+".",";"));=0A=
  b=3D_uES(_uGC(dc,"__utmb=3D"+_udh,";"));=0A=
  c=3D_uES(_uGC(dc,"__utmc=3D"+_udh,";"));=0A=
  x=3D_uES(_uGC(dc,"__utmx=3D"+_udh,";"));=0A=
  z=3D_uES(_uGC(dc,"__utmz=3D"+_udh+".",";"));=0A=
  v=3D_uES(_uGC(dc,"__utmv=3D"+_udh+".",";"));=0A=
  k=3D(_uHash(a+b+c+x+z+v)*1)+(_udh*1);=0A=
  =
p=3D"__utma=3D"+a+"&__utmb=3D"+b+"&__utmc=3D"+c+"&__utmx=3D"+x+"&__utmz=3D=
"+z+"&__utmv=3D"+v+"&__utmk=3D"+k;=0A=
 }=0A=
 if (p) {=0A=
  if (h && ih>-1) return;=0A=
  if (h) { url=3Dl+"#"+p; }=0A=
  else {=0A=
   if (iq=3D=3D-1 && ih=3D=3D-1) url=3Dl+"?"+p;=0A=
   else if (ih=3D=3D-1) url=3Dl+"&"+p;=0A=
   else if (iq=3D=3D-1) url=3Dl.substring(0,ih-1)+"?"+p+l.substring(ih);=0A=
   else url=3Dl.substring(0,ih-1)+"&"+p+l.substring(ih);=0A=
  }=0A=
 }=0A=
 return url;=0A=
}=0A=
function __utmLinker(l,h) {=0A=
 if (!_ulink || !l || l=3D=3D"") return;=0A=
 _udl.href=3D__utmLinkerUrl(l,h);=0A=
}=0A=
function __utmLinkPost(f,h) {=0A=
 if (!_ulink || !f || !f.action) return;=0A=
 f.action=3D__utmLinkerUrl(f.action, h);=0A=
 return;=0A=
}=0A=
function __utmSetVar(v) {=0A=
 if (!v || v=3D=3D"") return;=0A=
 if (!_udo || _udo =3D=3D "") {=0A=
  _udh=3D_uDomain();=0A=
  if (_udn && _udn!=3D"") { _udo=3D" domain=3D"+_udn+";"; }=0A=
 }=0A=
 if (!_uVG()) return;=0A=
 var r=3DMath.round(Math.random() * 2147483647);=0A=
 _ubd.cookie=3D"__utmv=3D"+_udh+"."+_uES(v)+"; path=3D"+_utcp+"; =
expires=3D"+_uNx()+";"+_udo;=0A=
 var s=3D"&utmt=3Dvar&utmn=3D"+r;=0A=
 if (_usample && _usample !=3D 100) s+=3D"&utmsp=3D"+_uES(_usample);=0A=
 if ((_userv=3D=3D0 || _userv=3D=3D2) && _uSP()) {=0A=
  var i=3Dnew Image(1,1);=0A=
  i.src=3D_ugifpath+"?"+"utmwv=3D"+_uwv+s;=0A=
  i.onload=3Dfunction() { _uVoid(); }=0A=
 }=0A=
 if ((_userv=3D=3D1 || _userv=3D=3D2) && _uSP()) {=0A=
  var i2=3Dnew Image(1,1);=0A=
  =
i2.src=3D_ugifpath2+"?"+"utmwv=3D"+_uwv+s+"&utmac=3D"+_uacct+"&utmcc=3D"+=
_uGCS();=0A=
  i2.onload=3Dfunction() { _uVoid(); }=0A=
 }=0A=
}=0A=
function _uGCS() {=0A=
 var t,c=3D"",dc=3D_ubd.cookie;=0A=
 if ((t=3D_uGC(dc,"__utma=3D"+_udh+".",";"))!=3D"-") =
c+=3D_uES("__utma=3D"+t+";+");=0A=
 if ((t=3D_uGC(dc,"__utmx=3D"+_udh,";"))!=3D"-") =
c+=3D_uES("__utmx=3D"+t+";+");=0A=
 if ((t=3D_uGC(dc,"__utmz=3D"+_udh+".",";"))!=3D"-") =
c+=3D_uES("__utmz=3D"+t+";+");=0A=
 if ((t=3D_uGC(dc,"__utmv=3D"+_udh+".",";"))!=3D"-") =
c+=3D_uES("__utmv=3D"+t+";");=0A=
 if (c.charAt(c.length-1)=3D=3D"+") c=3Dc.substring(0,c.length-1);=0A=
 return c;=0A=
}=0A=
function _uGC(l,n,s) {=0A=
 if (!l || l=3D=3D"" || !n || n=3D=3D"" || !s || s=3D=3D"") return "-";=0A=
 var i,i2,i3,c=3D"-";=0A=
 i=3Dl.indexOf(n);=0A=
 i3=3Dn.indexOf("=3D")+1;=0A=
 if (i > -1) {=0A=
  i2=3Dl.indexOf(s,i); if (i2 < 0) { i2=3Dl.length; }=0A=
  c=3Dl.substring((i+i3),i2);=0A=
 }=0A=
 return c;=0A=
}=0A=
function _uDomain() {=0A=
 if (!_udn || _udn=3D=3D"" || _udn=3D=3D"none") { _udn=3D""; return 1; }=0A=
 if (_udn=3D=3D"auto") {=0A=
  var d=3D_ubd.domain;=0A=
  if (d.substring(0,4)=3D=3D"www.") {=0A=
   d=3Dd.substring(4,d.length);=0A=
  }=0A=
  _udn=3Dd;=0A=
 }=0A=
 _udn =3D _udn.toLowerCase(); =0A=
 if (_uhash=3D=3D"off") return 1;=0A=
 return _uHash(_udn);=0A=
}=0A=
function _uHash(d) {=0A=
 if (!d || d=3D=3D"") return 1;=0A=
 var h=3D0,g=3D0;=0A=
 for (var i=3Dd.length-1;i>=3D0;i--) {=0A=
  var c=3DparseInt(d.charCodeAt(i));=0A=
  h=3D((h << 6) & 0xfffffff) + c + (c << 14);=0A=
  if ((g=3Dh & 0xfe00000)!=3D0) h=3D(h ^ (g >> 21));=0A=
 }=0A=
 return h;=0A=
}=0A=
function _uFixA(c,s,t) {=0A=
 if (!c || c=3D=3D"" || !s || s=3D=3D"" || !t || t=3D=3D"") return "-";=0A=
 var a=3D_uGC(c,"__utma=3D"+_udh+".",s);=0A=
 var lt=3D0,i=3D0;=0A=
 if ((i=3Da.lastIndexOf(".")) > 9) {=0A=
  _uns=3Da.substring(i+1,a.length);=0A=
  _uns=3D(_uns*1)+1;=0A=
  a=3Da.substring(0,i);=0A=
  if ((i=3Da.lastIndexOf(".")) > 7) {=0A=
   lt=3Da.substring(i+1,a.length);=0A=
   a=3Da.substring(0,i);=0A=
  }=0A=
  if ((i=3Da.lastIndexOf(".")) > 5) {=0A=
   a=3Da.substring(0,i);=0A=
  }=0A=
  a+=3D"."+lt+"."+t+"."+_uns;=0A=
 }=0A=
 return a;=0A=
}=0A=
function _uTrim(s) {=0A=
  if (!s || s=3D=3D"") return "";=0A=
  while ((s.charAt(0)=3D=3D' ') || (s.charAt(0)=3D=3D'\n') || =
(s.charAt(0,1)=3D=3D'\r')) s=3Ds.substring(1,s.length);=0A=
  while ((s.charAt(s.length-1)=3D=3D' ') || =
(s.charAt(s.length-1)=3D=3D'\n') || (s.charAt(s.length-1)=3D=3D'\r')) =
s=3Ds.substring(0,s.length-1);=0A=
  return s;=0A=
}=0A=
function _uEC(s) {=0A=
  var n=3D"";=0A=
  if (!s || s=3D=3D"") return "";=0A=
  for (var i=3D0;i<s.length;i++) {if (s.charAt(i)=3D=3D" ") n+=3D"+"; =
else n+=3Ds.charAt(i);}=0A=
  return n;=0A=
}=0A=
function __utmVisitorCode(f) {=0A=
 var r=3D0,t=3D0,i=3D0,i2=3D0,m=3D31;=0A=
 var a=3D_uGC(_ubd.cookie,"__utma=3D"+_udh+".",";");=0A=
 if ((i=3Da.indexOf(".",0))<0) return;=0A=
 if ((i2=3Da.indexOf(".",i+1))>0) r=3Da.substring(i+1,i2); else return =
"";  =0A=
 if ((i=3Da.indexOf(".",i2+1))>0) t=3Da.substring(i2+1,i); else return =
"";  =0A=
 if (f) {=0A=
  return r;=0A=
 } else {=0A=
  var c=3Dnew =
Array('A','B','C','D','E','F','G','H','J','K','L','M','N','P','R','S','T'=
,'U','V','W','X','Y','Z','1','2','3','4','5','6','7','8','9');=0A=
  return =
c[r>>28&m]+c[r>>23&m]+c[r>>18&m]+c[r>>13&m]+"-"+c[r>>8&m]+c[r>>3&m]+c[((r=
&7)<<2)+(t>>30&3)]+c[t>>25&m]+c[t>>20&m]+"-"+c[t>>15&m]+c[t>>10&m]+c[t>>5=
&m]+c[t&m];=0A=
 }=0A=
}=0A=
function _uIN(n) {=0A=
 if (!n) return false;=0A=
 for (var i=3D0;i<n.length;i++) {=0A=
  var c=3Dn.charAt(i);=0A=
  if ((c<"0" || c>"9") && (c!=3D".")) return false;=0A=
 }=0A=
 return true;=0A=
}=0A=
function _uES(s,u) {=0A=
 if (typeof(encodeURIComponent) =3D=3D 'function') {=0A=
  if (u) return encodeURI(s);=0A=
  else return encodeURIComponent(s);=0A=
 } else {=0A=
  return escape(s);=0A=
 }=0A=
}=0A=
function _uUES(s) {=0A=
 if (typeof(decodeURIComponent) =3D=3D 'function') {=0A=
  return decodeURIComponent(s);=0A=
 } else {=0A=
  return unescape(s);=0A=
 }=0A=
}=0A=
function _uVG() {=0A=
 if((_udn.indexOf("www.google.") =3D=3D 0 || _udn.indexOf(".google.") =
=3D=3D 0 || _udn.indexOf("google.") =3D=3D 0) && _utcp=3D=3D'/' && =
_udn.indexOf("google.org")=3D=3D-1) {=0A=
  return false;=0A=
 }=0A=
 return true;=0A=
}=0A=
function _uSP() {=0A=
 var s=3D100;=0A=
 if (_usample) s=3D_usample;=0A=
 if(s>=3D100 || s<=3D0) return true;=0A=
 return ((__utmVisitorCode(1)%10000)<(s*100));=0A=
}=0A=
function urchinPathCopy(p){=0A=
 var d=3Ddocument,nx,tx,sx,i,c,cs,t,h,o;=0A=
 cs=3Dnew Array("a","b","c","v","x","z");=0A=
 h=3D_uDomain(); if (_udn && _udn!=3D"") o=3D" domain=3D"+_udn+";";=0A=
 nx=3D_uNx()+";";=0A=
 tx=3Dnew Date(); tx.setTime(tx.getTime()+(_utimeout*1000));=0A=
 tx=3Dtx.toGMTString()+";";=0A=
 sx=3Dnew Date(); sx.setTime(sx.getTime()+(_ucto*1000));=0A=
 sx=3Dsx.toGMTString()+";";=0A=
 for (i=3D0;i<6;i++){=0A=
  t=3D" expires=3D";=0A=
  if (i=3D=3D1) t+=3Dtx; else if (i=3D=3D2) t=3D""; else if (i=3D=3D5) =
t+=3Dsx; else t+=3Dnx;=0A=
  c=3D_uGC(d.cookie,"__utm"+cs[i]+"=3D"+h,";");=0A=
  if (c!=3D"-") d.cookie=3D"__utm"+cs[i]+"=3D"+c+"; path=3D"+p+";"+t+o;=0A=
 }=0A=
}=0A=
function _uCO() {=0A=
 if (!_utk || _utk=3D=3D"" || _utk.length<10) return;=0A=
 var d=3D'www.google.com';=0A=
 if (_utk.charAt(0)=3D=3D'!') d=3D'analytics.corp.google.com';=0A=
 _ubd.cookie=3D"GASO=3D"+_utk+"; path=3D"+_utcp+";"+_udo;=0A=
 var sc=3Ddocument.createElement('script');=0A=
 sc.type=3D'text/javascript';=0A=
 sc.id=3D"_gasojs";=0A=
 =
sc.src=3D'https://'+d+'/analytics/reporting/overlay_js?gaso=3D'+_utk+'&'+=
Math.random();=0A=
 document.getElementsByTagName('head')[0].appendChild(sc);  =0A=
}=0A=
function _uGT() {=0A=
 var h=3Dlocation.hash, a;=0A=
 if (h && h!=3D"" && h.indexOf("#gaso=3D")=3D=3D0) {=0A=
  a=3D_uGC(h,"gaso=3D","&");=0A=
 } else {=0A=
  a=3D_uGC(_ubd.cookie,"GASO=3D",";");=0A=
 }=0A=
 return a;=0A=
}=0A=
var _utk=3D_uGT();=0A=
if (_utk && _utk!=3D"" && _utk.length>10 && _utk.indexOf("=3D")=3D=3D-1) =
{=0A=
 if (window.addEventListener) {=0A=
  window.addEventListener('load', _uCO, false); =0A=
 } else if (window.attachEvent) { =0A=
  window.attachEvent('onload', _uCO);=0A=
 }=0A=
}=0A=
=0A=
function _uNx() {=0A=
  return (new Date((new Date()).getTime()+63072000000)).toGMTString();=0A=
}=0A=

------=_NextPart_000_00DF_01C8F646.47BE8130--

