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Subject: The Combination of Ionizing Radiation and Peripheral Vaccination Produces Long-term Survival of Mice Bearing Established Invasive GL261 Gliomas -- Newcomb et al. 12 (15): 4730 -- Clinical Cancer Research
Date: Fri, 22 Feb 2008 14:42:58 +0100
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</TD></TR></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE><FONT=20
size=3D-1>Clinical Cancer Research Vol. 12, 4730-4737, August 1, =
2006<BR>=A9 2006 <A=20
href=3D"http://clincancerres.aacrjournals.org/misc/terms.shtml">American =

Association for Cancer Research</A> </FONT><BR>
<TABLE cellSpacing=3D0 cellPadding=3D0>
  <TBODY>
  <TR>
    <TD>
      <HR noShade SIZE=3D1>

      <H3><I>Cancer Therapy: =
Preclinical</I></H3></TD></TR></TBODY></TABLE>
<H2>The Combination of Ionizing Radiation and Peripheral Vaccination =
Produces=20
Long-term Survival of Mice Bearing Established Invasive GL261=20
Gliomas</H2><STRONG></NOBR><NOBR>Elizabeth W.=20
Newcomb<SUP>1</SUP><SUP>,5</SUP></NOBR>, <NOBR>Sandra=20
Demaria<SUP>1</SUP><SUP>,5</SUP></NOBR>, <NOBR>Yevgeniy=20
Lukyanov<SUP>1</SUP></NOBR>, <NOBR>Yongzhao=20
Shao<SUP>2</SUP><SUP>,5</SUP></NOBR>, <NOBR>Tona =
Schnee<SUP>1</SUP></NOBR>,=20
<NOBR>Noriko Kawashima<SUP>1</SUP></NOBR>, <NOBR>Li =
Lan<SUP>1</SUP></NOBR>,=20
<NOBR>J. Keith Dewyngaert<SUP>3</SUP></NOBR>, <NOBR>David=20
Zagzag<SUP>1</SUP><SUP>,4</SUP><SUP>,5</SUP></NOBR>, <NOBR>William H.=20
McBride<SUP>6</SUP></NOBR> and <NOBR>Silvia C.=20
Formenti<SUP>3</SUP><SUP>,5</SUP></NOBR> </STRONG>
<P><FONT size=3D-1><B>Authors' Affiliations:</B> Departments of =
<SUP>1</SUP>=20
Pathology, <SUP>2</SUP> Environmental Medicine, and <SUP>3</SUP> =
Radiation=20
Oncology, <SUP>4</SUP> Division of Neuropathology and Neurosurgery, =
<SUP>5</SUP>=20
New York University Cancer Institute, New York University School of =
Medicine,=20
New York, New York; and <SUP>6</SUP> Department of Radiation Oncology,=20
Experimental Division, University of California at Los Angeles School of =

Medicine, Los Angeles, California </FONT>
<P><FONT size=3D-1><B>Requests for reprints:</B> Elizabeth W. Newcomb, =
Department=20
of Pathology, MSB-531, New York University School of Medicine, 550 First =
Avenue,=20
New York, NY 10016. Phone: 212-263-8758; Fax: 212-263-8211; E-mail: =
<SPAN=20
id=3Dem0>newcoe01{at}med.nyu.edu</SPAN>
<SCRIPT type=3Dtext/javascript><!--=0A=
 var u =3D "newcoe01", d =3D "med.nyu.edu"; =
document.getElementById("em0").innerHTML =3D '<a href=3D"mailto:' + u + =
'@' + d + '">' + u + '@' + d + '<\/a>'//--></SCRIPT>
.</FONT>
<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=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/rarrow.gif" =

    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://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#top"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.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://clincancerres.aacrjournals.org/icons/toc/dot.gif" =
width=3D11=20
      border=3D0><FONT color=3D#464c53>Abstract</FONT><BR><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#SEC1"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Materials and Methods<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#SEC2"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Results<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#SEC3"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Discussion<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#BIBL"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      =
border=3D0>References<BR></A></FONT></TH></TR></TBODY></TABLE>&nbsp;<BR><=
B>Purpose:</B>=20
High-grade glioma treatment includes ionizing radiation<SUP> =
</SUP>therapy. The=20
high invasiveness of glioma cells precludes their<SUP> </SUP>eradication =
and is=20
responsible for the dismal prognosis. Recently,<SUP> </SUP>we reported =
the=20
down-regulation of MHC class I (MHC-I) products<SUP> </SUP>in invading =
tumor=20
cells in human and mouse GL261 gliomas. Here,<SUP> </SUP>we tested the=20
hypothesis that whole-brain radiotherapy (WBRT)<SUP> </SUP>up-regulates =
MHC-I=20
expression on GL261 tumors and enhances the<SUP> </SUP>effectiveness of=20
immunotherapy.<SUP> </SUP>
<P><B>Experimental Design:</B> MHC-I molecule expression on GL261 =
cells<SUP>=20
</SUP>was analyzed <I>in vitro</I> and <I>in vivo</I> by flow cytometry =
and=20
immunohistochemistry,<SUP> </SUP>respectively. To test the response of=20
established GL261 gliomas<SUP> </SUP>to treatment, mice with measurable =
(at CT=20
imaging) brain tumors<SUP> </SUP>were randomly assigned to four groups =
receiving=20
(<I>a</I>) no treatment,<SUP> </SUP>(<I>b</I>) WBRT in two fractions of =
4 Gy,=20
(<I>c</I>) vaccination with irradiated<SUP> </SUP>GL261 cells secreting=20
granulocyte-macrophage colony-stimulating<SUP> </SUP>factor, or =
(<I>d</I>) WBRT=20
and vaccination. Endpoints were tumor response<SUP> </SUP>and =
survival.<SUP>=20
</SUP>
<P><B>Results:</B> An ionizing radiation dose of 4 Gy maximally=20
up-regulated<SUP> </SUP>MHC-I molecules on GL261 cells <I>in vitro. In =
vivo</I>,=20
WBRT induced<SUP> </SUP>the expression of the =DF2-microglobulin light =
chain<SUP>=20
</SUP>subunit of the MHC class I complex on glioma cells invading<SUP>=20
</SUP>normal brain and increased CD4+ and CD8+ T cell infiltration.<SUP> =

</SUP>However, the survival advantage obtained with WBRT or =
vaccination<SUP>=20
</SUP>alone was minimal. In contrast, WBRT in combination with =
vaccination<SUP>=20
</SUP>increased long-term survival to 40% to 80%, compared with 0%<SUP> =
</SUP>to=20
10% in the other groups (<I>P</I> &lt; 0.002). Surviving animals<SUP>=20
</SUP>showed antitumor immunity by rejecting challenge tumors.<SUP> =
</SUP>
<P><B>Conclusion:</B> Ionizing radiation can be successfully =
combined<SUP>=20
</SUP>with peripheral vaccination for the treatment of established<SUP>=20
</SUP>high-grade gliomas.<SUP> </SUP>
<P>
<HR align=3Dcenter width=3D"30%" noShade SIZE=3D1>
Radiation therapy remains the principal approach for the treatment<SUP> =
</SUP>of=20
adult patients with high-grade glioma and pediatric patients<SUP> =
</SUP>with=20
brainstem gliomas, generally involving fractionated radiotherapy<SUP> =
</SUP>with=20
total doses up to 60 Gy (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B1">1</A>=96<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B4">4</A>).=20
The addition of concurrent<SUP> </SUP>temozolomide to radiotherapy has =
been=20
shown to significantly<SUP> </SUP>prolong the life of patients with=20
glioblastoma, but long-term<SUP> </SUP>survivors of this disease remains =

extremely rare (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B5">5</A>).<SUP>=20
</SUP>
<P>Because of the pressing need for adjunctive therapies to enhance<SUP> =

</SUP>the effectiveness of radiation therapy for glioma, we have =
developed<SUP>=20
</SUP>an experimental murine GL261 model that mimics the aggressive<SUP> =

</SUP>and invasive growth observed in human brain tumors (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B6">6</A>=96<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B8">8</A>)<SUP>=20
</SUP>and whose growth can be monitored noninvasively by CT =
imaging.<SUP>=20
</SUP>Using this model, we showed significant down-regulation of =
MHC<SUP>=20
</SUP>genes <I>in vivo</I> in tumor cells invading normal brain tissue =
in<SUP>=20
</SUP>comparison with the glioma cells in the core of the tumor, =
similar<SUP>=20
</SUP>to what we had observed in human glioma (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B9">9</A>).=20
We hypothesized<SUP> </SUP>that one of the mechanisms for invading =
glioma cells=20
to defeat<SUP> </SUP>the host immune surveillance system is =
down-regulating=20
expression<SUP> </SUP>of MHC molecules at the growing edge of the tumor. =
The=20
general<SUP> </SUP>hypothesis of tumor immune surveillance was =
originally=20
formulated<SUP> </SUP>by Burnet in 1970 (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B10">10</A>).=20
It is now clear that there is a complex<SUP> </SUP>relationship between =
the=20
host's immunosurveillance system and<SUP> </SUP>the ability of =
transformed cells=20
to escape immune recognition<SUP> </SUP>and destruction (reviewed in =
refs. <A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B11">11</A>=96<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B14">14</A>).=20
The ability<SUP> </SUP>of tumor cells to modulate the host's immune =
response has=20
important<SUP> </SUP>implications for the development of =
immunotherapies,=20
including<SUP> </SUP>the design of effective cancer vaccines (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B15">15</A>,=20
<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B16">16</A>).<SUP>=20
</SUP>
<P>Recently, there has been growing interest in the interactions<SUP>=20
</SUP>between ionizing radiation (IR) and the immune system. =
Several<SUP>=20
</SUP>studies have shown that irradiation of human and murine tumor<SUP> =

</SUP>cell lines up-regulates the expression of numerous =
immunologically<SUP>=20
</SUP>relevant molecules, including Fas, ICAM-1, MHC class I, and<SUP> =
</SUP>the=20
human carcinoma-associated antigens, CEA and MUC-1 (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B17">17</A>=96<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B21">21</A>),<SUP>=20
</SUP>which may make them better targets for immune recognition. In<SUP> =

</SUP>the present study, we tested the hypothesis that a low dose<SUP> =
</SUP>of=20
whole-brain radiotherapy (WBRT) of GL261 intracranial (i.c.)<SUP> =
</SUP>tumors=20
may up-regulate MHC class I expression, as measured by<SUP> </SUP>the =
surrogate=20
marker, =DF2-microglobulin, thus providing<SUP> </SUP>a target for a T=20
cell=96mediated antitumor immune response<SUP> </SUP>elicited by =
vaccination. We=20
show significant increases in the<SUP> </SUP>long-term survival of mice =
with=20
well-established i.c. GL261<SUP> </SUP>gliomas treated with WBRT and=20
vaccination, concomitant with<SUP> </SUP>the development of antitumor =
immunity.=20
The growing awareness<SUP> </SUP>that IR can make tumors more amenable =
to immune=20
recognition<SUP> </SUP>has important implications for the development of =
novel=20
immunotherapies.<SUP> </SUP>Importantly, the more insidious invading =
tumor cells=20
that invariably<SUP> </SUP>lead to fatal relapse may be particularly =
targeted as=20
a result<SUP> </SUP>of this strategy.<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=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/rarrow.gif" =

    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://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#top"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Top<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#ABS"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.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://clincancerres.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://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#SEC2"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Results<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#SEC3"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Discussion<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#BIBL"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      =
border=3D0>References<BR></A></FONT></TH></TR></TBODY></TABLE>&nbsp;<BR><=
B><I>GL261=20
glioma tumor cell line and reagents.</I></B> The murine GL261<SUP> =
</SUP>glioma=20
cell line was obtained from the National Cancer Institute-Frederick<SUP> =

</SUP>Cancer Research Tumor Repository (Frederick, MD). The cells<SUP>=20
</SUP>were transfected with the plasmid encoding the gene for green<SUP> =

</SUP>fluorescent protein (GFP) according to the manufacturer's =
protocol<SUP>=20
</SUP>(Clontech, Palo Alto, CA) and cultured in 5% CO<SUB>2</SUB> and =
95%=20
humidified<SUP> </SUP>air atmosphere at 37=B0C in DMEM (Life =
Technologies,=20
Grand<SUP> </SUP>Island, NY) supplemented with 10% fetal bovine serum=20
(Atlanta<SUP> </SUP>Biologicals, Norcross, GA), 0.25% gentamicin (Life=20
Technologies)<SUP> </SUP>and 1% <FONT size=3D-2>L</FONT>-glutamine (Life =

Technologies) as described (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B7">7</A>).=20
The<SUP> </SUP>GL261 cell line retrovirally transduced to secrete=20
granulocyte-macrophage<SUP> </SUP>colony-stimulating factor (GM-CSF) was =
a kind=20
gift from Dr.<SUP> </SUP>X.O. Breakefield (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B22">22</A>)=20
and was cultured as described for the<SUP> </SUP>nontransduced GL261 =
cells. Both=20
GL261 glioma cell lines were<SUP> </SUP>split every 3 days to ensure =
logarithmic=20
growth.<SUP> </SUP>
<P><B><I>Flow cytometric analysis of the GL261 cell line.</I></B> GL261=20
cells<SUP> </SUP>were plated (5 <FONT face=3Darial,helvetica>x</FONT>=20
10<SUP>5</SUP>/75 cm<SUP>2</SUP> flask) and after 48 hours, the =
flasks<SUP>=20
</SUP>were either irradiated (0, 2, 4, and 6 Gy) using a <SUP>60</SUP>Co =

source<SUP> </SUP>(Theratron 780-C; AECL Medical, Canada) or treated =
with=20
IFN-<IMG alt=3D{gamma} =
src=3D"http://clincancerres.aacrjournals.org/math/gamma.gif"=20
border=3D0><SUP> </SUP>(150 pg/mL). Cells were harvested 72 hours after=20
irradiation<SUP> </SUP>in cold PBS containing 0.04% EDTA and processed =
in=20
parallel<SUP> </SUP>for MHC expression by fluorescence-activated cell =
sorting=20
(FACS)<SUP> </SUP>analysis or for mRNA gene expression by RT-PCR =
analysis as=20
described<SUP> </SUP>below. For FACS analysis, cells were washed and =
incubated=20
with<SUP> </SUP>phycoerythrin-conjugated anti-H2-K<SUP>b</SUP> (clone =
AF6-88.5),=20
phycoerythrin<SUP> </SUP>anti-H2-D<SUP>b</SUP> (clone KH95), and =
phycoerythrin=20
anti-Fas/CD95 or<SUP> </SUP>isotype controls (all antibodies from BD =
PharMingen,=20
San Jose,<SUP> </SUP>CA). Samples were analyzed using a FACSCalibur flow =

cytometer<SUP> </SUP>(Becton Dickinson, Bedford, MA) and FlowJo 4.5.2 =
software=20
(Ashland,<SUP> </SUP>OR).<SUP> </SUP>
<P><B><I>Flow cytometric analysis of tumor-infiltrating cells.</I></B> =
To=20
determine<SUP> </SUP>the nature and number of immune cells infiltrating =
GL261=20
tumors<SUP> </SUP>growing in the brain of mice, on day 23 =
postimplantation,=20
two<SUP> </SUP>brains were harvested from each treatment group and=20
single-cell<SUP> </SUP>homogenates were prepared for FACS analysis. Each =
brain=20
was<SUP> </SUP>removed and the tumor-bearing hemispheres were finely =
minced<SUP>=20
</SUP>with a razor blade and then homogenized in 5 mL of PBS in a<SUP>=20
</SUP>Dounce homogenizer (7 mL, Pyrex, no. 7727-07). The homogenate<SUP> =

</SUP>was drawn up into a 12 mL syringe fitted with a 21-gauge =
needle<SUP>=20
</SUP>and passaged 10 times through the needle. The final cell =
suspension<SUP>=20
</SUP>was filtered through a 40-=B5m nylon cell strainer (BD =
Falcon,<SUP>=20
</SUP>San Jose, CA) into a 50 mL tube. The single-cell suspension<SUP> =
</SUP>was=20
centrifuged at 400 <FONT face=3Darial,helvetica>x</FONT> <I>g</I> for 10 =
minutes=20
at room temperature.<SUP> </SUP>The pellet was resuspended in 4 mL of =
30%=20
isotonic Percoll and<SUP> </SUP>overlaid on a Percoll gradient and =
centrifuged=20
at 500 <FONT face=3Darial,helvetica>x</FONT> <I>g</I> for<SUP> </SUP>20 =
minutes as=20
described (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B23">23</A>).=20
Lymphocytes were collected from<SUP> </SUP>the 37% to 70% interface, =
washed once=20
in PBS and counted in<SUP> </SUP>a hemacytometer. Aliquots of cells (1 =
<FONT=20
face=3Darial,helvetica>x</FONT> 10<SUP>5</SUP>) were blocked in<SUP> =
</SUP>10%=20
normal mouse serum in PBS for 15 minutes at room temperature<SUP> =
</SUP>followed=20
by incubation with phycoerythrin-conjugated antimouse<SUP> =
</SUP>monoclonal=20
antibodies to CD4 T cells (clone GK1.5) and to natural<SUP> </SUP>killer =
cells=20
(clone 01295A), and Cychrome-conjugated antimouse<SUP> </SUP>monoclonal =
antibody=20
to CD8 T cells (clone 53-6.7) for 30 minutes<SUP> </SUP>on ice. All =
antibodies=20
were purchased from BD PharMingen. Cells<SUP> </SUP>were washed once in =
PBS,=20
resuspended in 1% paraformaldehyde,<SUP> </SUP>and stored at 4=B0C until =
analyzed=20
by FACS analysis using<SUP> </SUP>a FACSCalibur flow cytometer (Becton=20
Dickinson).<SUP> </SUP>
<P>To obtain the total number of lymphocytes, we took the total<SUP>=20
</SUP>number of viable cells isolated from the two pooled brains =
(control,<SUP>=20
</SUP>3.7 <FONT face=3Darial,helvetica>x</FONT> 10<SUP>5</SUP>; WBRT, =
8.0 <FONT=20
face=3Darial,helvetica>x</FONT> 10<SUP>5</SUP>) and multiplied by the=20
percentage<SUP> </SUP>of cells in the lymphocyte gate (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG3">Fig.=20
3A</A>; control, 44.5% gated<SUP> </SUP>represents 1.65 <FONT=20
face=3Darial,helvetica>x</FONT> 10<SUP>5</SUP>; WBRT, 60.3% gated =
represents 4.82=20
<FONT face=3Darial,helvetica>x</FONT> 10<SUP>5</SUP>).<SUP> </SUP>This =
number of=20
total lymphocytes was then multiplied by the<SUP> </SUP>percentage of =
cells in=20
the lymphocyte gate positive for CD4+,<SUP> </SUP>CD8+, or NK1.1 to =
obtain the=20
total number of lymphocytes in<SUP> </SUP>each subset depicted as a bar =
graph=20
(<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG3">Fig.=20
3B</A>).<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://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
/FIG3"><IMG=20
            height=3D200 alt=3D"Figure 3" hspace=3D10=20
            =
src=3D"http://clincancerres.aacrjournals.org/content/vol12/issue15/images=
/small/4730fig03g.gif"=20
            width=3D84 vspace=3D5 border=3D2></A><BR><STRONG>View larger =

            version</STRONG> (30K):<BR><NOBR><A=20
            =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
/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', 335, 640); =
this.href=3D'/cgi/content-nw/full/12/15/4730/FIG3'"=20
            =
href=3D"http://clincancerres.aacrjournals.org/cgi/content-nw/full/12/15/4=
730/FIG3"=20
            target=3DFIG3>[in a new window]</A><BR><BR>&nbsp;</NOBR> =
</TD>
          <TD vAlign=3Dtop align=3Dleft><B>Fig. 3.</B> IR increases=20
            tumor-infiltrating lymphocytes into GL261 tumors. GL261 =
cells were=20
            implanted i.c. on day 0, and mice were either left untreated =

            (<I>Control</I>) or given WBRT of 4 Gy on days 15 and 17=20
            (<I>WBRT</I>). On day 23, brains were harvested and the=20
            lymphocyte-enriched fractions were collected as described in =

            Materials and Methods and stained with phycoerythrin-Cy5 =
anti-CD8,=20
            and phycoerythrin anti-CD4 or anti-NK1.1 monoclonal =
antibodies,=20
            followed by flow cytometry analysis. <I>A,</I> the =
lymphocyte gate=20
            was set based on the scatter plots of spleen cells. =
Representative=20
            data from one of two groups of mice. <I>B,</I> the total =
number of=20
            CD4, CD8, and natural killer cells were calculated based on =
the=20
            total viable cells recovered from each group, and multiplied =
by the=20
            percentage of gated lymphocytes as described in Materials =
and=20
            Methods; columns, number of cells in each subset.
            =
<P></P></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></CENTER>&nbsp=
;<BR><B><I>RNA=20
isolation and reverse transcription-PCR.</I></B> Total RNA was =
isolated<SUP>=20
</SUP>from suspension cultures of GL261 cells (see above for FACS<SUP>=20
</SUP>analysis) using the RNeasy kit (Qiagen Inc., Valencia, CA) =
according<SUP>=20
</SUP>to the manufacturer's directions. RNA was quantitated by =
absorbance<SUP>=20
</SUP>at 260 nm. Two micrograms of total RNA was =
reverse-transcribed<SUP>=20
</SUP>using Super Script II RNase H reverse transcriptase =
(Invitrogen,<SUP>=20
</SUP>Carlsbad, CA) and random hexamer primers (Invitrogen) at =
25=B0C<SUP>=20
</SUP>for 10 minutes and 42=B0C for 1 hour for cDNA synthesis. Two<SUP>=20
</SUP>microliters of the reverse transcription product was used as<SUP> =
</SUP>a=20
template for PCR amplification. PCR was done under standard<SUP>=20
</SUP>conditions in a 50 =B5L reaction mix containing 1<FONT=20
face=3Darial,helvetica>x</FONT> PCR buffer,<SUP> </SUP>1 unit of =
Platinum Taq=20
polymerase (Invitrogen), 200 =B5mol/L<SUP> </SUP>of deoxynucleotide =
triphosphate=20
mix, 1.5 mmol/L of MgCl<SUB>2</SUB>, and<SUP> </SUP>150 nmol/L of=20
H-2K<SUP>b</SUP> primers (5-GGAAAAGGAGGGGACTATGC-3, sense;<SUP>=20
</SUP>5-TCCATAAGGCTCACAGGGAAC-3, antisense), or 25 nmol/L of =
=DF-actin<SUP>=20
</SUP>primers (5-CACAGGGGAGGTGATAGCAT-3, sense; =
5-TCAAGTTGGGGGACAAAAG-3,<SUP>=20
</SUP>antisense). The PCR conditions consisted of 3 minutes of an<SUP>=20
</SUP>initial denaturation step (95=B0C) followed by 25 cycles of<SUP>=20
</SUP>denaturation (95=B0C, 30 seconds), annealing (55=B0C, 30<SUP> =
</SUP>seconds),=20
and extension (72=B0C, 50 seconds) followed by a<SUP> </SUP>final =
elongation step=20
of 7 minutes at 72=B0C. Twenty microliters<SUP> </SUP>of PCR product was =
analyzed=20
on 3% agarose gels stained with<SUP> </SUP>ethidium bromide. =
Quantitation of=20
bands was done with the Bio-Rad<SUP> </SUP>Fluor-S apparatus (Bio-Rad, =
Hercules,=20
CA) with Quantity One<SUP> </SUP>(version 4.2.1) software.<SUP> </SUP>
<P><B><I>Immunohistochemistry.</I></B> Single and double label=20
immunohistochemistry<SUP> </SUP>was done using the NexES automated =
immunostainer=20
and detection<SUP> </SUP>systems (Ventana Medical Systems, Tucson, AZ).=20
Formalin-fixed,<SUP> </SUP>paraffin-embedded, 6 =B5m sections were =
deparaffinized=20
in<SUP> </SUP>xylene (three changes), rehydrated through a graded series =
of<SUP>=20
</SUP>alcohols, and rinsed in distilled water. All incubations were<SUP> =

</SUP>carried out at 37=B0C, unless noted otherwise.<SUP> </SUP>
<P>To detect MHC class I expression in mouse tissue, sections were<SUP>=20
</SUP>immunostained with rabbit anti-human/mouse =DF2-microglobulin<SUP> =

</SUP>antibody (Novocastra Laboratories, Newcastle upon Tyne, =
United<SUP>=20
</SUP>Kingdom). This antibody reacts with the light chain component<SUP> =

</SUP>of MHC class I molecules (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B9">9</A>).=20
Antigen retrieval was done by<SUP> </SUP>proteolytic enzyme digestion =
(alkaline=20
endopeptidase, 0.5 units/mL;<SUP> </SUP>Ventana Medical Systems) for 4 =
minutes.=20
Endogenous peroxidase<SUP> </SUP>was blocked by the application of =
hydrogen=20
peroxide for 4 minutes<SUP> </SUP>at 37=B0C. Anti-=DF2-microglobulin was =
diluted=20
1:1,000<SUP> </SUP>and =DF2-microglobulin antibody was detected by =
the<SUP>=20
</SUP>application of a secondary biotinylated goat anti-mouse =
(Ventana<SUP>=20
</SUP>Medical Systems) for 8 minutes, followed by the application<SUP> =
</SUP>of=20
streptavidin-horseradish peroxidase for 8 minutes. The chromogen,<SUP>=20
</SUP>3,3'-diaminobenzidine/hydrogen peroxide mix was applied for<SUP> =
</SUP>8=20
minutes and then enhanced with copper sulfate for 4 minutes.<SUP> =
</SUP>Slides=20
were then counterstained in hematoxylin, dehydrated,<SUP> </SUP>and =
mounted with=20
Permount.<SUP> </SUP>
<P>GL261 glioma cells expressing GFP were used to detect tumor<SUP> =
</SUP>cells=20
invading the brain adjacent to the tumor. Tissue sections<SUP> =
</SUP>were=20
immunostained with mouse anti-GFP (clone GFP01; Neomarkers,<SUP> =
</SUP>Fremont,=20
CA). Antigen retrieval was done by microwaving tissue<SUP> =
</SUP>sections in=20
0.01 mol/L (pH 6.0) citrate buffer for 20 minutes<SUP> </SUP>in a 1,200 =
W=20
microwave oven. Slides were allowed to cool to<SUP> </SUP>room =
temperature, then=20
washed in 0.05 mol/L Tris-HCl (pH 7.6)<SUP> </SUP>containing 0.3 mol/L =
NaCl.=20
Endogenous peroxidase was blocked<SUP> </SUP>by the application of =
hydrogen=20
peroxide for 4 minutes at 37=B0C.<SUP> </SUP>For double label=20
immunohistochemistry, tumor sections were first<SUP> </SUP>stained with=20
=DF2-microglobulin. Heat-induced antigen<SUP> </SUP>retrieval was done =
as=20
described above. Next, slides were incubated<SUP> </SUP>with anti-GFP =
antibody=20
diluted 1:300 and incubated overnight<SUP> </SUP>at room temperature. =
GFP=20
antibody was detected as described<SUP> </SUP>above using alkaline =
phosphatase=20
fast red as chromogen.<SUP> </SUP>
<P>To evaluate lymphocyte populations in brain tissue, tissue =
sections<SUP>=20
</SUP>were immunostained with mouse anti-human CD3 (clone PS2, =
Novocastra<SUP>=20
</SUP>Laboratories). Antigen retrieval was done by microwaving =
tissue<SUP>=20
</SUP>sections in 0.01 mol/L (pH 6.0) citrate buffer for 10 minutes<SUP> =

</SUP>as described above. Endogenous peroxidase was blocked by the<SUP>=20
</SUP>application of hydrogen peroxide for 4 minutes at 37=B0C.<SUP>=20
</SUP>Anti-CD3 was diluted 1:200, incubated for 30 minutes at room<SUP>=20
</SUP>temperature, and then anti-CD3 antibody was detected by the<SUP>=20
</SUP>application of a secondary biotinylated goat anti-mouse =
(Ventana<SUP>=20
</SUP>Medical Systems) for 8 minutes, followed by the application<SUP> =
</SUP>of=20
streptavidin-horseradish peroxidase for 8 minutes. The chromogen,<SUP>=20
</SUP>3,3'-diaminobenzidine/hydrogen peroxide mix was applied for<SUP> =
</SUP>3=20
minutes.<SUP> </SUP>
<P><B><I>Animals and i.c. tumor implantation.</I></B> Female C57BL/6 =
mice=20
were<SUP> </SUP>obtained from Taconic (Germantown, NY) and maintained =
under<SUP>=20
</SUP>aseptic conditions in microisolator cages in facilities =
approved<SUP>=20
</SUP>by the American Association for Accreditation of Laboratory<SUP>=20
</SUP>Animal Care in accordance with the current regulations and =
standards<SUP>=20
</SUP>of the U.S. Department of Agriculture, The Department of =
Health<SUP>=20
</SUP>and Human Services, and the NIH. Animal studies were done =
under<SUP>=20
</SUP>an approved protocol by the Institutional Animal Care and Use<SUP> =

</SUP>Committee. The animals were allowed food and water ad =
libitum.<SUP>=20
</SUP>GL261 cells were cultured to subconfluence, trypsinized, =
washed<SUP>=20
</SUP>twice in DMEM without serum, and resuspended in DMEM for =
inoculation<SUP>=20
</SUP>into animals.<SUP> </SUP>
<P>To establish i.c. tumors, GL261 glioma cells were implanted<SUP> =
</SUP>in the=20
brains of 10- to 12-week-old female C57BL/6 mice (20<SUP> </SUP>g) as =
described=20
(<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B24">24</A>).=20
Briefly, animals were anesthetized with<SUP> </SUP>an i.p. injection of =
xylazine=20
(80 mg/kg) and ketamine (10 mg/kg)<SUP> </SUP>and a burr hole was =
drilled in the=20
skull 0.1 mm posterior to<SUP> </SUP>the bregma and 2.3 mm lateral to =
the=20
midline. GL261 cells (5<SUP> </SUP><FONT face=3Darial,helvetica>x</FONT> =

10<SUP>7</SUP>/mL) in 2 =B5L of medium were inoculated =
stereotactically<SUP>=20
</SUP>using a head frame (David Kopf Instruments, Tujunga, CA) in<SUP> =
</SUP>the=20
defined location of the caudate/putamen (0.1 mm posterior<SUP> </SUP>to =
the=20
bregma, 2.3 mm lateral to the midline) using a 10 =B5L<SUP> =
</SUP>Hamilton syringe=20
(Reno, NV) with a 1-in. 30-gauge needle attached<SUP> </SUP>and inserted =
into a=20
Kopf microinjection unit (Model 5000 with<SUP> </SUP>Model 5001 Hamilton =
syringe=20
holder). The needle was advanced<SUP> </SUP>to a depth of 2.3 mm from =
the brain=20
surface and the cell suspension<SUP> </SUP>was delivered slowly over the =
course=20
of 3 to 4 minutes. Following<SUP> </SUP>injection, the needle was left =
in place=20
for 2 minutes, after<SUP> </SUP>which time, it was raised to a depth of =
1.5 mm=20
below the brain<SUP> </SUP>surface and left in place for an additional 1 =
minute.=20
Upon withdrawal<SUP> </SUP>of the needle, the burr hole was immediately =
sealed=20
with bone<SUP> </SUP>wax and the incision sutured. Animals were randomly =

assigned<SUP> </SUP>into control and treatment groups (<I>n</I> =3D =
5/group).=20
Animals were<SUP> </SUP>observed weekly and when they showed signs of =
neurologic=20
deficit<SUP> </SUP>(lethargy, failure to ambulate, or lack of feeding=20
resulting<SUP> </SUP>in loss of &gt;20% body weight) they were =
sacrificed.=20
Prior<SUP> </SUP>to sacrifice, the animals were anesthetized and then=20
perfused<SUP> </SUP>transcardially with PBS followed by 4% =
paraformaldehyde.=20
Brains<SUP> </SUP>were removed and placed in cold 4% paraformaldehyde=20
overnight,<SUP> </SUP>then sliced into 2 mm coronal sections prior to =
processing=20
and<SUP> </SUP>embedding in paraffin. Tumors were measured grossly in =
three<SUP>=20
</SUP>orthogonal axes to determine tumor volumes. H&amp;E-stained<SUP>=20
</SUP>coronal sections were used as a check of tumor volumes and =
for<SUP>=20
</SUP>overall tumor histopathology.<SUP> </SUP>
<P><B><I>CT imaging.</I></B> Animals were anesthetized with xylazine and =

ketamine,<SUP> </SUP>as described above, prior to imaging the brain =
using a CT=20
scanner<SUP> </SUP>(GE LightSpeed Qx/i). Animals received an =
intraorbital=20
injection<SUP> </SUP>of contrast agent (100 =B5L; Conray, Mallinckrodt, =
Inc.,<SUP>=20
</SUP>St. Louis, MO) and within 10 minutes of contrast injection,<SUP>=20
</SUP>axial images of the brain were acquired using the CT scanner<SUP> =
</SUP>to=20
detect the presence of brain tumors. Contrasted tumors appear<SUP> =
</SUP>as=20
regions of brighter intensity (similar to that of the bone<SUP> =
</SUP>tissue, in=20
the animal skull) in the CT scan compared with surrounding<SUP> =
</SUP>brain=20
tissue which appears dark due to lower intensity.<SUP> </SUP>
<P><B><I>Preparation of the GL261 vaccine.</I></B> To analyze the =
secretion=20
of<SUP> </SUP>GM-CSF into the medium, cells (5 <FONT=20
face=3Darial,helvetica>x</FONT> 10<SUP>5</SUP>) were plated in a 60<SUP> =
</SUP>mm=20
dish in 2.5 mL of medium. After 24 hours, the supernatant<SUP> </SUP>was =

harvested and either stored at =9680=B0C or tested<SUP> </SUP>directly =
by ELISA for=20
GM-CSF using a commercial ELISA kit (R&amp;D<SUP> </SUP>System, =
Minneapolis, MN)=20
according to the manufacturer's instructions.<SUP> </SUP>The GM-CSF =
transduced=20
cells that we obtained secreted 100 ng/10<SUP>6</SUP><SUP> =
</SUP>cells/24 hours=20
GM-CSF, similar to the original report (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B22">22</A>).<SUP>=20
</SUP>For vaccine preparation, GL261 cells were irradiated with 25<SUP> =
</SUP>Gy=20
in 75 cm<SUP>2</SUP> flasks, using a <SUP>60</SUP>Co source (Theratron =
780-C,=20
AECL<SUP> </SUP>Medical), trypsinized, washed, and inoculated s.c. into =
the<SUP>=20
</SUP>left and right flanks of mice (2.5 <FONT =
face=3Darial,helvetica>x</FONT>=20
10<SUP>6</SUP>/100 =B5L/injection<SUP> </SUP>in the inguinal =
regions).<SUP> </SUP>
<P><B><I>WBRT combined with GL261 peripheral vaccine treatment.</I></B> =
In=20
the<SUP> </SUP>first experiment, on day 12 post-i.c. implantation, =
animals<SUP>=20
</SUP>were randomly assigned to four treatment groups (<I>n</I> =3D =
5/group):<SUP>=20
</SUP>(<I>a</I>) control with sham radiation, (<I>b</I>) WBRT given in =
two=20
fractions<SUP> </SUP>of 4 Gy, 48 hours apart on days 12 and 14, =
(<I>c</I>)=20
vaccination treatment<SUP> </SUP>given on both flanks with irradiated =
(25 Gy)=20
GL261 tumor cells<SUP> </SUP>secreting GM-CSF on day 14 after i.c. tumor =
cell=20
implantation,<SUP> </SUP>(<I>d</I>) WBRT + vaccination treatment, where=20
peripheral vaccination<SUP> </SUP>was given a few hours after the =
animals had=20
received their second<SUP> </SUP>fraction of WBRT on day 14. WBRT was =
delivered=20
to the head of<SUP> </SUP>the mouse centered in a 5 cm radiation field =
using a=20
<SUP>60</SUP>Co radiation<SUP> </SUP>source (Theratron 780-C, AECL =
Medical) on=20
days 12 and 14 postimplantation.<SUP> </SUP>
<P>In the second experiment, CT on day 15 post-i.c. implantation,<SUP>=20
</SUP>when tumors were large enough to be reliably measured, was =
used<SUP>=20
</SUP>to compute tumor volumes. Images were digitally transferred<SUP> =
</SUP>to=20
a Varian Eclipse radiation planning system workstation and<SUP> =
</SUP>tumor=20
volumes were calculated using the formula for ellipsoid<SUP> =
</SUP>volume. Two=20
dimensions (in frontal plane) were measured directly<SUP> </SUP>and the =
third=20
dimension was measured using three-dimensional<SUP> </SUP>reconstructing =
feature=20
of the planning system. Animals were<SUP> </SUP>assigned to four =
treatment=20
groups (<I>n</I> =3D 5/group) so that the<SUP> </SUP>mean tumor volumes =
were 3.5=20
mm<SUP>3</SUP> (range, 2.1-4.8) in all groups.<SUP> </SUP>The groups =
consisted=20
of (<I>a</I>) control with sham irradiation, (<I>b</I>)<SUP> </SUP>WBRT, =
given=20
in two fractions of 4 Gy, 48 hours apart on days<SUP> </SUP>15 and 17,=20
(<I>c</I>) vaccination as described above on day 17, and<SUP> =
</SUP>(<I>d</I>)=20
WBRT + vaccination, where peripheral vaccination was given<SUP> </SUP>a =
few=20
hours after the animals had received their second fraction<SUP> </SUP>of =
WBRT on=20
day 17. On day 28, tumor volume was assessed by CT.<SUP> </SUP>On day =
60,=20
control "na=EFve" 6- to 8-week-old female C57BL/6<SUP> </SUP>mice or =
surviving=20
animals were challenged by s.c. injection<SUP> </SUP>in the hind limb of =
2 <FONT=20
face=3Darial,helvetica>x</FONT> 10<SUP>6</SUP> cells in 0.05 mL of =
serum-free=20
media.<SUP> </SUP>We chose to evaluate antitumor immunity in the =
long-term=20
survivors<SUP> </SUP>using s.c. rather than i.c. tumor rechallenge in =
order to=20
assess<SUP> </SUP>their systemic state of immunity. Tumor growth was=20
measured<SUP> </SUP>twice weekly using calipers and tumor volumes were=20
calculated<SUP> </SUP>using the formula (length <FONT=20
face=3Darial,helvetica>x</FONT> width<SUP>2</SUP>) / 2, where the length =

represents<SUP> </SUP>the longest axis and the width was measured at =
right=20
angles<SUP> </SUP>to the length. Animals were observed for an additional =
60=20
days<SUP> </SUP>and/or sacrificed when tumor volumes reached 900 to =
1,200=20
mm<SUP>3</SUP>.<SUP> </SUP>Brains from "cured" animals were removed and=20
processed for histopathology.<SUP> </SUP>
<P><B><I>Statistics.</I></B> Kaplan-Meier survival curves with a =
log-rank=20
test<SUP> </SUP>were used to compare the survival proportions of the =
four=20
treatment<SUP> </SUP>groups (control, WBRT, vaccination, and WBRT +=20
vaccination).<SUP> </SUP>Differences were considered significant at =
<I>P</I>=20
&lt; 0.05.<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=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/rarrow.gif" =

    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://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#top"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Top<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#ABS"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Abstract<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#SEC1"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.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://clincancerres.aacrjournals.org/icons/toc/dot.gif" =
width=3D11=20
      border=3D0><FONT color=3D#464c53>Results</FONT><BR><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#SEC3"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      border=3D0>Discussion<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#BIBL"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      =
border=3D0>References<BR></A></FONT></TH></TR></TBODY></TABLE>&nbsp;<BR><=
B><I>IR=20
up-regulates MHC class I expression on GL261 glioma cells</I><SUP> =
</SUP>in=20
vitro.</B> We recently reported that invading GL261 glioma tumor<SUP>=20
</SUP>cells in the brain down-regulate MHC class I expression, a =
molecule<SUP>=20
</SUP>required for recognition by CTLs (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B9">9</A>).=20
We investigated whether<SUP> </SUP>irradiation could reverse this low=20
expression, as has been reported<SUP> </SUP>for other cell lines <I>in =
vitro</I>=20
(<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B17">17</A>),=20
GL261 cells were irradiated<SUP> </SUP>with different doses of IR (0, 2, =
4, or 6=20
Gy) or treated with<SUP> </SUP>IFN-<IMG alt=3D{gamma}=20
src=3D"http://clincancerres.aacrjournals.org/math/gamma.gif" border=3D0> =
(150 pg/mL)=20
as a positive control (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B25">25</A>,=20
<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B26">26</A>).<SUP>=20
</SUP>
<P>Irradiation of GL261 cells increased surface MHC class I=20
H-2K<SUP>b</SUP><SUP> </SUP>expression 72 hours after irradiation (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG1">Fig.=20
1A</A> ). Treatment<SUP> </SUP>with 4 or 6 Gy induced similar increases =
in=20
H-2K<SUP>b</SUP> expression,<SUP> </SUP>whereas 2 Gy was less effective =
(data=20
not shown). Expression<SUP> </SUP>of H-2D<SUP>b</SUP> on GL261 was =
undetectable=20
on untreated cells and was<SUP> </SUP>not induced by radiation. =
Similarly, there=20
was no induction<SUP> </SUP>of Fas/CD95 molecules after irradiation =
(data not=20
shown). As<SUP> </SUP>expected, IFN-<IMG alt=3D{gamma}=20
src=3D"http://clincancerres.aacrjournals.org/math/gamma.gif" border=3D0> =
markedly=20
increased the surface expression of<SUP> </SUP>both H-2K<SUP>b</SUP> and =

H-2D<SUP>b</SUP> MHC class I molecules. Up-regulation of<SUP> </SUP>the=20
H-2K<SUP>b</SUP> MHC protein complex at the cell surface by IR or =
IFN-<IMG=20
alt=3D{gamma} =
src=3D"http://clincancerres.aacrjournals.org/math/gamma.gif"=20
border=3D0><SUP> </SUP>treatment was accompanied by increased levels of=20
H-2K<SUP>b</SUP> mRNA<SUP> </SUP>gene expression as assessed by RT-PCR =
(<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG1">Fig.=20
1B</A>).<SUP> </SUP>
<P><A name=3DFIG1><!-- 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://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
/FIG1"><IMG=20
            height=3D179 alt=3D"Figure 1" hspace=3D10=20
            =
src=3D"http://clincancerres.aacrjournals.org/content/vol12/issue15/images=
/small/4730fig01g.gif"=20
            width=3D200 vspace=3D5 border=3D2></A><BR><STRONG>View =
larger=20
            version</STRONG> (28K):<BR><NOBR><A=20
            =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
/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, 594); =
this.href=3D'/cgi/content-nw/full/12/15/4730/FIG1'"=20
            =
href=3D"http://clincancerres.aacrjournals.org/cgi/content-nw/full/12/15/4=
730/FIG1"=20
            target=3DFIG1>[in a new window]</A><BR><BR>&nbsp;</NOBR> =
</TD>
          <TD vAlign=3Dtop align=3Dleft><B>Fig. 1.</B> IR induces =
up-regulation of=20
            MHC expression in GL261 glioma cells <I>in vitro</I> as =
shown by=20
            (<I>A</I>) FACS analysis and (<I>B</I>) RT-PCR. Using FACS =
analysis,=20
            GL261 cells treated with 4 Gy or IFN-<IMG alt=3D{gamma}=20
            src=3D"http://clincancerres.aacrjournals.org/math/gamma.gif" =
border=3D0>=20
            show up-regulation of MHC expression (<I>black =
histogram</I>)=20
            compared with untreated cells (<I>gray histogram</I>). The=20
            up-regulation of cell surface antigen expression for MHC was =

            correlated with increased gene transcription.
            =
<P></P></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></CENTER>&nbsp=
;<BR><B><I>IR=20
up-regulates =DF2-microglobulin expression on GL261<SUP> </SUP>glioma =
cells</I> in=20
vivo.</B> GL261-GFP tumor cells were used to identify<SUP> </SUP>glioma =
cells in=20
the brain and to test whether irradiation would<SUP> </SUP>increase the=20
expression of MHC <I>in vivo</I>. WBRT was delivered to<SUP> </SUP>the =
brains of=20
mice on days 12 and 14 after implantation, when<SUP> </SUP>tumors were =
<IMG=20
alt=3D~ src=3D"http://clincancerres.aacrjournals.org/math/sim.gif" =
border=3D0>4 =B1 1=20
mm<SUP>3</SUP> in volume (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B24">24</A>).=20
On the basis of<SUP> </SUP>our <I>in vitro</I> MHC expression data, we =
selected=20
two 4-Gy doses<SUP> </SUP>48 hours apart for the <I>in vivo</I> =
treatments.=20
Brains were harvested<SUP> </SUP>48 hours following the second fraction =
of WBRT=20
and processed<SUP> </SUP>for immunohistochemistry as described =
previously (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B9">9</A>).=20
We used<SUP> </SUP>double-labeled immunohistochemistry to visualize=20
GFP-positive<SUP> </SUP>tumor cells invading the brain adjacent to tumor =
(<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG2">Fig.=20
2A</A> )<SUP> </SUP>and expression of the light chain of the=20
=DF2-microglobulin<SUP> </SUP>complex to assess MHC class I expression. =
Brains=20
from one representative<SUP> </SUP>control and one WBRT animal of a =
group of=20
four animals are shown<SUP> </SUP>(<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG2">Fig.=20
2</A>). In untreated mice, there was no detectable expression<SUP> =
</SUP>of=20
=DF2-microglobulin by the invading tumor cells (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG2">Fig.=20
2B</A>).<SUP> </SUP>In contrast, following WBRT, there was strong =
surface=20
staining<SUP> </SUP>of the invading tumor cells, consistent with =
up-regulation=20
of<SUP> </SUP>MHC class I complexes (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG2">Fig.=20
2C</A>).<SUP> </SUP>
<P><A name=3DFIG2><!-- null --></A><BR clear=3Dall>
<CENTER>
<TABLE cellSpacing=3D0 cellPadding=3D0 width=3D"95%">
  <TBODY>
  <TR bgColor=3D#e1e1e1>
    <TD>
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          <TD vAlign=3Dtop align=3Dmiddle bgColor=3D#ffffff><A=20
            =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
/FIG2"><IMG=20
            height=3D200 alt=3D"Figure 2" hspace=3D10=20
            =
src=3D"http://clincancerres.aacrjournals.org/content/vol12/issue15/images=
/small/4730fig02c.gif"=20
            width=3D198 vspace=3D5 border=3D2></A><BR><STRONG>View =
larger=20
            version</STRONG> (120K):<BR><NOBR><A=20
            =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
/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', 585, 640); =
this.href=3D'/cgi/content-nw/full/12/15/4730/FIG2'"=20
            =
href=3D"http://clincancerres.aacrjournals.org/cgi/content-nw/full/12/15/4=
730/FIG2"=20
            target=3DFIG2>[in a new window]</A><BR><BR>&nbsp;</NOBR> =
</TD>
          <TD vAlign=3Dtop align=3Dleft><B>Fig. 2.</B> IR induces =
up-regulation of=20
            =DF2-microglobulin expression in GL261 glioma cells <I>in =
vivo. A,</I>=20
            invasive growth pattern of GL261 tumors. Tissue sections =
were=20
            stained for GFP to reveal GL261 tumor cells (<I>red =
label</I>;=20
            magnification, <FONT face=3Darial,helvetica>x</FONT>100). =
<I>C,</I>=20
            double label immunohistochemistry analysis of MHC expression =

            (<I>brown label</I>) on GFP-positive GL261 tumor cells =
(<I>red=20
            label</I>). <I>B,</I> representative brains from a control =
animal or=20
            48 hours after WBRT treatment with two fractions of 4 Gy are =
shown=20
            (magnification, <FONT face=3Darial,helvetica>x</FONT>100). =
Insets, one=20
            representative GFP-positive GL261 tumor cell invading the =
brain=20
            adjacent to tumor (<I>BAT</I>) in control (<I>red label =
only</I>)=20
            compared with one representative GFP-positive GL261 tumor =
cell=20
            invading the BAT from a WBRT animal showing coexpression of =
GFP and=20
            =DF2-microglobulin (<I>double red</I> and <I>brown =
label</I>;=20
            magnification, <FONT face=3Darial,helvetica>x</FONT>400).
            =
<P></P></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></CENTER>&nbsp=
;<BR><B><I>IR=20
increases lymphocytes infiltrating GL261 tumors.</I></B> A possible<SUP> =

</SUP>consequence of the administration of IR is the induction of<SUP> =
</SUP>an=20
inflammatory response (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B27">27</A>=96<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B30">30</A>).=20
To test this, mice were<SUP> </SUP>randomly assigned to receive mock =
treatment=20
or WBRT given in<SUP> </SUP>two doses of 4 Gy on days 15 and 17 =
post-i.c. tumor=20
implantation.<SUP> </SUP>Brains were harvested 7 days later and =
single-cell=20
suspensions<SUP> </SUP>were prepared and partially purified on Percoll =
gradients=20
for<SUP> </SUP>the analysis of lymphocyte subsets by flow cytometry (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG3">Fig.=20
3</A> ).<SUP> </SUP>Representative data from one of two groups of =
control or=20
WBRT<SUP> </SUP>animals are shown. The contamination with GFP-positive=20
tumor<SUP> </SUP>cells in the lymphocyte gate was &lt;1% in all samples=20
(data<SUP> </SUP>not shown). The numbers of CD4+, CD8+, and natural =
killer=20
cells<SUP> </SUP>recovered from brain tumors of control and irradiated =
mice=20
are<SUP> </SUP>shown in the bar graph (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG3">Fig.=20
3B</A>). There was a 4-fold increase<SUP> </SUP>in the number of CD4+ =
and a=20
4.5-fold increase in CD8+ T cells<SUP> </SUP>in the brain tumors of =
irradiated=20
mice, whereas natural killer<SUP> </SUP>cells showed a small increase =
compared=20
with brain tumors of<SUP> </SUP>control mice.<SUP> </SUP>
<P><B><I>Increased tumor-free survival of animals bearing i.c. =
GL261<SUP>=20
</SUP>tumors treated with WBRT combined with peripheral=20
vaccination.</I></B><SUP> </SUP>Vaccination with irradiated autologous =
tumor=20
cells transduced<SUP> </SUP>to secrete GM-CSF has been shown to induce a =
T=20
cell=96mediated<SUP> </SUP>antitumor response against GL261 glioma (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B31">31</A>).=20
The elicited immune<SUP> </SUP>response, which is mediated, at least in =
part, by=20
CD8+ T cells<SUP> </SUP>can inhibit the growth of early brain tumors (<A =

href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B31">31</A>).=20
To test whether<SUP> </SUP>WBRT can increase the susceptibility of =
established=20
invasive<SUP> </SUP>GL261 glioma to the antitumor immune response =
elicited by=20
vaccination,<SUP> </SUP>we used the treatment protocol shown in the =
schema (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG4">Fig.=20
4A</A> ).<SUP> </SUP>At day 12 after i.c. implantation, animals were =
randomly=20
assigned<SUP> </SUP>to four treatment groups: (<I>a</I>) control, =
(<I>b</I>)=20
WBRT given in two<SUP> </SUP>fractions of 4 Gy, (<I>c</I>) vaccination =
with=20
irradiated GL261 cells<SUP> </SUP>transduced to secrete the cytokine =
GM-CSF, and=20
(<I>d</I>) WBRT + vaccination.<SUP> </SUP>The mean survival time was 33 =
=B1 7 days=20
for control animals,<SUP> </SUP>55 =B1 24 days for animals treated with=20
fractionated WBRT<SUP> </SUP>alone, and 45 =B1 21 days for animals =
treated with=20
vaccination<SUP> </SUP>only (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG4">Fig.=20
4B</A>). In the group treated with WBRT + vaccination,<SUP> </SUP>80% of =
the=20
animals had long-term survival times of &gt;75 days<SUP> </SUP>compared =
with=20
only 10% in the other treatment groups. This difference<SUP> </SUP>in =
overall=20
survival was statistically significant (<I>P</I> &lt; 0.002).<SUP> =
</SUP>
<P><A name=3DFIG4><!-- null --></A><BR clear=3Dall>
<CENTER>
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          <TD vAlign=3Dtop align=3Dmiddle bgColor=3D#ffffff><A=20
            =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
/FIG4"><IMG=20
            height=3D200 alt=3D"Figure 4" hspace=3D10=20
            =
src=3D"http://clincancerres.aacrjournals.org/content/vol12/issue15/images=
/small/4730fig04g.gif"=20
            width=3D106 vspace=3D5 border=3D2></A><BR><STRONG>View =
larger=20
            version</STRONG> (20K):<BR><NOBR><A=20
            =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
/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', 383, 640); =
this.href=3D'/cgi/content-nw/full/12/15/4730/FIG4'"=20
            =
href=3D"http://clincancerres.aacrjournals.org/cgi/content-nw/full/12/15/4=
730/FIG4"=20
            target=3DFIG4>[in a new window]</A><BR><BR>&nbsp;</NOBR> =
</TD>
          <TD vAlign=3Dtop align=3Dleft><B>Fig. 4.</B> Increased =
tumor-free=20
            survival of animals bearing i.c. GL261 tumors treated with =
whole=20
            brain fractionated radiation combined with peripheral =
vaccination.=20
            <I>A,</I> schema outlining the treatments used in the =
experiments.=20
            <I>B,</I> Kaplan-Meier survival curves of animals in the =
different=20
            treatment groups. <I>C,</I> animals "cured" by the different =

            treatments were rechallenged on day 75 of i.c. implantation =
with=20
            s.c. injection of 2 <FONT face=3Darial,helvetica>x</FONT>=20
            10<SUP>6</SUP> GL261 cells in the hind limb. Normal growth =
of GL261=20
            tumors was monitored by injection of cells into na=EFve =
mice. The=20
            overall survival of na=EFve and rechallenged animals was =
followed for=20
            8 weeks.
            =
<P></P></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></CENTER>&nbsp=
;<BR>To=20
test whether the long-term survivors had developed effective<SUP> =
</SUP>systemic=20
antitumor immunity, all surviving animals were rechallenged<SUP> =
</SUP>with=20
viable GL261 cells in the hind limb and observed for tumor<SUP>=20
</SUP>development for an additional 8 weeks (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG4">Fig.=20
4C</A>). All five of<SUP> </SUP>the na=EFve animals developed tumors by =
day 28. In=20
contrast,<SUP> </SUP>none of the long-term survivors from the different=20
treatment<SUP> </SUP>groups developed tumors, indicating that these =
animals had=20
developed<SUP> </SUP>immunologic memory capable of rejecting GL261 =
tumor.<SUP>=20
</SUP>
<P><B><I>Radioresponse of established i.c. GL261 tumors treated =
with<SUP>=20
</SUP>WBRT combined with peripheral vaccination.</I></B> In a subsequent =

experiment,<SUP> </SUP>CT scanning was used to image the i.c. tumors and =
follow=20
the<SUP> </SUP>kinetics of tumor response to treatment. CT scanning was=20
first<SUP> </SUP>done on day 15 after implantation, at which time, =
tumors=20
were<SUP> </SUP>usually large enough to be reliably visualized. Animals=20
were<SUP> </SUP>then assigned to four treatment groups (control, WBRT,=20
vaccination,<SUP> </SUP>or WBRT + vaccination), such that the tumor =
volumes were=20
comparable<SUP> </SUP>between groups. Treatment was administered as =
described=20
above<SUP> </SUP>(<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG4">Fig.=20
4A</A>) except that WBRT was given on days 15 and 17, and<SUP> =
</SUP>vaccination=20
on day 17. Representative CT scans from animals<SUP> </SUP>prior to =
treatment on=20
day 15 and after treatment on day 28 are<SUP> </SUP>shown (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG5">Fig.=20
5A</A> , arrows indicate tumors) together with the<SUP> =
</SUP>Kaplan-Meier=20
survival curves (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG5">Fig.=20
5B</A>). The mean survival was<SUP> </SUP>33 =B1 3 days for control =
animals, 37 =B1=20
7 days for<SUP> </SUP>animals treated with fractionated WBRT alone, and =
34=20
=B1<SUP> </SUP>6 days for animals treated with vaccination only. The =
survival<SUP>=20
</SUP>advantage observed following WBRT or vaccination alone was =
less<SUP>=20
</SUP>than in the previous experiment (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG4">Fig.=20
4B</A>), suggesting that a<SUP> </SUP>delay of only a few days in =
treatment and=20
correspondingly larger<SUP> </SUP>tumors dramatically reduces the =
effectiveness=20
of vaccination<SUP> </SUP>and radiation as single modalities. =
Importantly,=20
although the<SUP> </SUP>group treated with WBRT + vaccination had an =
overall=20
reduced<SUP> </SUP>survival advantage as compared with the previous=20
experiment<SUP> </SUP>(<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG4">Fig.=20
4B</A>), 40% of the animals experienced long-term survival<SUP> </SUP>as =

compared with none of the animals in the other treatment<SUP> =
</SUP>groups. This=20
difference in overall survival was statistically<SUP> </SUP>significant=20
(<I>P</I> &lt; 0.002). Again, the long-term survivors failed<SUP> =
</SUP>to=20
develop tumors upon rechallenge with GL261 glioma cells in<SUP> =
</SUP>the hind=20
leg after 60 days compared with the controls.<SUP> </SUP>
<P><A name=3DFIG5><!-- 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://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
/FIG5"><IMG=20
            height=3D200 alt=3D"Figure 5" hspace=3D10=20
            =
src=3D"http://clincancerres.aacrjournals.org/content/vol12/issue15/images=
/small/4730fig05g.gif"=20
            width=3D183 vspace=3D5 border=3D2></A><BR><STRONG>View =
larger=20
            version</STRONG> (41K):<BR><NOBR><A=20
            =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
/FIG5">[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('FIG5', 553, 640); =
this.href=3D'/cgi/content-nw/full/12/15/4730/FIG5'"=20
            =
href=3D"http://clincancerres.aacrjournals.org/cgi/content-nw/full/12/15/4=
730/FIG5"=20
            target=3DFIG5>[in a new window]</A><BR><BR>&nbsp;</NOBR> =
</TD>
          <TD vAlign=3Dtop align=3Dleft><B>Fig. 5.</B> Radioresponse of=20
            established i.c. GL261 tumors treated with whole brain =
fractionated=20
            radiation combined with peripheral vaccination. <I>A,</I> CT =
scans=20
            of representative animals at day 15 prior to initiation of=20
            treatments and again on day 28 of the same animals showing =
their=20
            response to a given treatment. Arrows, contrasted tumors. =
<I>B,</I>=20
            Kaplan-Meier survival curves of animals in the different =
treatment=20
            groups.
            =
<P></P></TD></TR></TBODY></TABLE></TD></TR></TBODY></TABLE></CENTER>&nbsp=
;<BR><A=20
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=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/rarrow.gif" =

    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://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#top"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Top<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#ABS"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Abstract<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#SEC1"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Materials and Methods<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#SEC2"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.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://clincancerres.aacrjournals.org/icons/toc/dot.gif" =
width=3D11=20
      border=3D0><FONT color=3D#464c53>Discussion</FONT><BR><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#BIBL"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/darrow.gif" =
width=3D11=20
      =
border=3D0>References<BR></A></FONT></TH></TR></TBODY></TABLE>&nbsp;<BR>O=
ur=20
previous work has shown that the murine GL261 cell line<SUP> </SUP>can =
be used=20
to develop a valid transplantable orthotopic model<SUP> </SUP>of human =
glioma.=20
Traditionally, mouse models of glioma have<SUP> </SUP>primarily used =
xenografts=20
of human glioma cell lines implanted<SUP> </SUP>i.c. into =
immunoincompetent mice=20
(<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B32">32</A>).=20
As a result, they have<SUP> </SUP>been unable to test immunotherapeutic=20
strategies (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B33">33</A>).=20
Furthermore,<SUP> </SUP>such tumors do not show the invasive phenotype=20
characteristic<SUP> </SUP>of human gliomas that is often associated with =

treatment failure<SUP> </SUP>(<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B33">33</A>).=20
In contrast to the xenograft models, GL261 tumors show<SUP> =
</SUP>extensive=20
invasion into the brain parenchyma adjacent to the<SUP> </SUP>tumor with =
visible=20
single or multiple tumor cells advancing<SUP> </SUP>into the brain along =

vascular channels (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B7">7</A>,=20
<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B9">9</A>).=20
The derivative<SUP> </SUP>of GL261 expressing GFP was used to readily =
identify=20
invading<SUP> </SUP>tumor cells (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B7">7</A>).=20
Although GFP can be immunogenic, our data show<SUP> </SUP>that it does =
not=20
change the tumorigenicity of this poorly immunogenic<SUP> </SUP>glioma =
(<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B7">7</A>).=20
Moreover, using neuroimaging techniques, including<SUP> </SUP>perfusion =
MRI, we=20
have documented a correlation between tumor<SUP> </SUP>growth, relative =
cerebral=20
blood volume, microvascular density,<SUP> </SUP>and histologic features=20
associated with the highly angiogenic<SUP> </SUP>nature of the GL261 =
tumors (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B34">34</A>).<SUP>=20
</SUP>
<P>Contrary to the earlier belief that the brain was refractory<SUP> =
</SUP>to=20
infiltration with immune cells, there is now ample evidence<SUP> =
</SUP>that=20
immune cells can traffic to the brain and affect the growth<SUP> =
</SUP>of=20
experimental gliomas (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B35">35</A>=96<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B37">37</A>).=20
More than a decade ago,<SUP> </SUP>it was shown that peripheral =
vaccination with=20
cytokine-secreting<SUP> </SUP>autologous tumor cells could induce an =
immune=20
response against<SUP> </SUP>the intracerebral tumor in experimental =
animals (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B38">38</A>).<SUP>=20
</SUP>
<P>In the current study, we used GL261 glioma cells transduced<SUP> =
</SUP>to=20
secrete the cytokine GM-CSF as a vaccine. Vaccination with<SUP> =
</SUP>tumor=20
cells modified to secrete GM-CSF has been shown to be<SUP> =
</SUP>effective in=20
several preclinical cancer models, as well as in<SUP> </SUP>clinical =
trials in=20
generating a systemic and durable antitumor<SUP> </SUP>immune response =
(reviewed=20
in ref. <A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B39">39</A>).=20
In an experimental setting<SUP> </SUP>of well-established, =
radiologically=20
detectable i.c. tumors,<SUP> </SUP>the combination of the vaccine with =
WBRT was=20
superior to either<SUP> </SUP>treatment alone. Similar data were =
obtained by=20
Lumniczky et<SUP> </SUP>al. (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B31">31</A>).=20
However, in their study, treatment was given 3 days<SUP> </SUP>following =
i.c.=20
implantation of GL261, at a time when the tumor<SUP> </SUP>was unlikely =
to be=20
well established. To better mimic the clinical<SUP> </SUP>setting, we =
elected to=20
study GL261 glioma tumors when they were<SUP> </SUP>firmly established, =
as=20
documented by CT imaging.<SUP> </SUP>
<P>Time after implantation and tumor size are critical factors<SUP>=20
</SUP>affecting the therapeutic response to vaccination, as shown<SUP> =
</SUP>by=20
the fact that 40%, 10%, and 0% of mice treated with vaccination<SUP> =
</SUP>alone=20
achieve long-term survival when vaccine is given on days<SUP> </SUP>3, =
14, and=20
17, respectively (ref. <A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B31">31</A>;=20
<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG4">Figs.=20
4</A> and <A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG5">5</A>).=20
Although<SUP> </SUP>we do not know whether delayed vaccination elicits =
an=20
antitumor<SUP> </SUP>immune response of the same magnitude as =
vaccination given=20
earlier<SUP> </SUP>in the course of tumor growth, the response is =
sufficient=20
to<SUP> </SUP>obtain a therapeutic effect when combined with WBRT. GL261 =

gliomas<SUP> </SUP>are relatively radioresistant tumors =
(TCD<SUB>50</SUB> =3D 65=20
Gy; ref. <A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B8">8</A>).<SUP>=20
</SUP>Consequently, the modest dose of radiation used in our =
experiments<SUP>=20
</SUP>is unlikely to have resulted in sufficient cell death to =
explain<SUP>=20
</SUP>the clinical response observed (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG5">Fig.=20
5B</A>), suggesting that its<SUP> </SUP>major effect may indeed have =
been to=20
facilitate infiltration<SUP> </SUP>and/or recognition of tumor cells by=20
antitumor T cells. Our<SUP> </SUP>studies identify one possible =
mechanism=20
whereby this could occur<SUP> </SUP>in that radiation treatment =
up-regulated the=20
expression of MHC<SUP> </SUP>class I H2-K<SUP>b</SUP> and =
=DF2-microglobulin=20
molecules on GL261<SUP> </SUP>glioma cells <I>in vitro</I> and <I>in =
vivo</I>,=20
respectively. <I>In vitro</I>, treatment<SUP> </SUP>with 4 Gy was =
sufficient to=20
up-regulate the expression of H2-K<SUP>b</SUP><SUP> </SUP>but not=20
H2-D<SUP>b</SUP> molecules on GL261 cells. Differential regulation<SUP> =
</SUP>of=20
H2-K and H2-D locus products by radiation has been previously<SUP>=20
</SUP>reported in the B16 melanoma model (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B40">40</A>).=20
Other studies using<SUP> </SUP>sublethal doses of radiation on a wide =
variety of=20
human cancer<SUP> </SUP>cell lines also showed up-regulation of one or =
more=20
surface<SUP> </SUP>molecules involved in T cell=96mediated immune =
responses,<SUP>=20
</SUP>including MHC class I, Fas, ICAM-1, CEA, and MUC-1 (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B17">17</A>=96<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B21">21</A>).<SUP>=20
</SUP>Increase of MHC class I expression on GL261 cells has been =
shown<SUP>=20
</SUP>to confer greater sensitivity to tumor-specific CTLs <I>in =
vitro</I>,<SUP>=20
</SUP>as shown by using T cells specific for the =
melanoma-associated<SUP>=20
</SUP>antigen gp100 expressed by GL261 cells (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B41">41</A>).<SUP>=20
</SUP>
<P>Significantly, irradiation induced the expression of =
=DF2-microglobulin<SUP>=20
</SUP>on invading GL261 glioma cells <I>in vivo</I> (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG2">Fig.=20
2C</A>), a surrogate<SUP> </SUP>marker used in this study for MHC class =
I=20
expression. The finding<SUP> </SUP>of very low MHC class I expression on =
glioma=20
cells invading<SUP> </SUP>the normal brain tissue (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B9">9</A>)=20
of nonirradiated mice could, at<SUP> </SUP>least in part, be responsible =
for the=20
resistance of established<SUP> </SUP>tumors to antitumor T cells =
elicited by=20
vaccination (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG5">Fig.=20
5B</A>).<SUP> </SUP>Therefore, it is possible that the significant tumor =

response,<SUP> </SUP>as determined by CT imaging and increased survival, =
among=20
the<SUP> </SUP>mice treated with WBRT and vaccination is due to the=20
increased<SUP> </SUP>susceptibility of irradiated GL261 to antitumor T =
cells (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG5">Fig.=20
5B</A>).<SUP> </SUP>Nevertheless, other radiation-induced changes in =
brain=20
tumor<SUP> </SUP>microenvironment are likely to contribute to the=20
therapeutic<SUP> </SUP>benefit of the combination treatment. For =
instance, the=20
observed<SUP> </SUP>influx of inflammatory cells, including CD4+ and =
CD8+ T=20
cells<SUP> </SUP>in response to local radiation (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#FIG3">Fig.=20
3</A>) may be triggered by<SUP> </SUP>local production of cytokines and =
other=20
inflammatory signals<SUP> </SUP>in addition to the up-regulation of =
vascular=20
adhesion molecules<SUP> </SUP>(reviewed in ref. <A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B30">30</A>).=20
Moreover, we cannot exclude the possibility<SUP> </SUP>that the effects =
of=20
radiation not only on the tumor but also<SUP> </SUP>on normal brain =
tissue,=20
which was included in the radiation<SUP> </SUP>field, contribute to the =
observed=20
results. MHC class I antigens<SUP> </SUP>are usually not expressed in =
the=20
central nervous system, but<SUP> </SUP>they might be induced by =
radiation.=20
However, by immunohistochemistry,<SUP> </SUP>we did not detect the =
expression of=20
=DF2-microglobulin<SUP> </SUP>in the normal brain adjacent to the =
irradiated=20
tumor, suggesting<SUP> </SUP>that an autoimmune response is unlikely to =
be=20
generated and<SUP> </SUP>a true therapeutic benefit might result from =
the=20
combination<SUP> </SUP>of radiation treatment with a vaccination =
strategy.<SUP>=20
</SUP>
<P>Immunotherapy of brain tumors is rapidly emerging as a viable<SUP>=20
</SUP>clinical option (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B42">42</A>),=20
but its use as a first-line approach remains<SUP> </SUP>controversial =
(<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B43">43</A>).=20
At least two "proof of principle" studies<SUP> </SUP>have been reported =
using=20
vaccines prepared from the patients'<SUP> </SUP>autologous irradiated =
glioma=20
tumor cells admixed with GM-CSF<SUP> </SUP>or IL-4-secreting fibroblasts =
(<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B44">44</A>,=20
<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B45">45</A>).=20
In a phase I clinical<SUP> </SUP>trial using tumor vaccination plus =
adoptive T=20
cell immunotherapy<SUP> </SUP>for patients with newly diagnosed =
malignant=20
gliomas, several<SUP> </SUP>objective clinical responses were observed =
without=20
any long-term<SUP> </SUP>toxicities (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B44">44</A>).=20
More recently, several groups have developed<SUP> </SUP>dendritic cell =
vaccines,=20
using either acid-eluted peptides from<SUP> </SUP>glioblastoma =
multiforme cell=20
cultures developed from the surgical<SUP> </SUP>specimen or from crude =
tumor=20
lysates (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B45">45</A>=96<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B48">48</A>).=20
In several<SUP> </SUP>patients, a systemic CTL response was detected, =
and in=20
some<SUP> </SUP>cases, tumor-infiltrating lymphocytes were also observed =
in<SUP>=20
</SUP>the resection specimen obtained at relapse. Despite the =
occurrence<SUP>=20
</SUP>of sporadic objective responses and some modest increase in<SUP> =
</SUP>the=20
patient's survival, no long-term survivors have emerged<SUP> </SUP>from =
these=20
approaches (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B45">45</A>=96<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B48">48</A>).<SUP>=20
</SUP>
<P>Presumably, established invasive gliomas escape immune =
recognition<SUP>=20
</SUP>through multiple mechanisms. One of them is low expression of<SUP> =

</SUP>MHC class I molecules, as we have previously reported in all<SUP>=20
</SUP>grade 4 human gliomas (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B9">9</A>).=20
Findings from studies in other tumor<SUP> </SUP>types also emphasize the =

importance of MHC class I expression<SUP> </SUP>by the tumor cells in =
eliciting=20
an effective immune response.<SUP> </SUP>A recent study of 124 stage IV =
melanoma=20
patients shows that<SUP> </SUP>infiltration of tumors by CD4+ and CD8+ T =
cells=20
correlated with<SUP> </SUP>the expression of MHC class I by the tumor =
cells and=20
was associated<SUP> </SUP>with a better prognosis (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B49">49</A>).=20
Similar findings were reported<SUP> </SUP>in another study of head and =
neck=20
tumor patients, in which a<SUP> </SUP>positive correlation was found =
between MHC=20
class I expression,<SUP> </SUP>the presence of tumor-infiltrating =
lymphocytes,=20
and a better<SUP> </SUP>prognosis (<A=20
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#B50">50</A>).=20
These data support the hypothesis that a strategy<SUP> </SUP>to enhance =
the=20
expression of MHC class I molecules on tumor<SUP> </SUP>cells may =
increase the=20
efficacy of cancer vaccines.<SUP> </SUP>
<P>In summary, our results show that IR increases the expression<SUP> =
</SUP>of=20
MHC class I on GL261 glioma cells <I>in vitro</I> and increases<SUP> =
</SUP>the=20
expression of =DF2-microglobulin <I>in vivo</I>. When radiotherapy<SUP> =
</SUP>is=20
combined with peripheral vaccination, it achieves significant<SUP>=20
</SUP>long-term survival rates in animals bearing established, =
measurable<SUP>=20
</SUP>i.c. tumors with an invasive phenotype. These results also =
show<SUP>=20
</SUP>that the GL261 glioma model is a relevant preclinical model<SUP> =
</SUP>for=20
further exploring the mechanisms associated with radiation-induced<SUP>=20
</SUP>antitumor immunity. The preclinical evidence presented offers<SUP> =

</SUP>promise to a clinical translation. The fact that modest doses<SUP> =

</SUP>of radiation were required to recover MHC class I expression<SUP>=20
</SUP>supports the safety of combining radiotherapy in trials of=20
immunotherapy<SUP> </SUP>for patients with recurrent high-grade gliomas =
who are=20
likely<SUP> </SUP>to have already received first-line radiotherapy.<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=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/rarrow.gif" =

    width=3D10></TD>
    <TH vAlign=3Dcenter align=3Dleft width=3D"95%"><FONT =
size=3D+2>&nbsp;&nbsp;=20
      Footnotes </FONT></TH></TR></TBODY></TABLE>&nbsp;<BR><A=20
name=3D""><!-- null --></A><B>Grant support:</B> NIH Research grants =
NS-57829=20
(E.W. Newcomb),<SUP> </SUP>CA-100426 (D. Zagzag), KO8 CA-89336 and =
American=20
Cancer Society<SUP> </SUP>grant RSG-05-145-01-LIB (S. Demaria); =
Department of=20
Defense<SUP> </SUP>grant W8IXWH-04-1-0905 and American Cancer Society =
grant=20
TURSG<SUP> </SUP>CCE 103174 (S.C. Formenti).<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 <I>advertisement</I> 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> E.W. Newcomb and S. =
Demaria=20
contributed equally to this<SUP> </SUP>work.<SUP> </SUP>
<P>Received 3/10/06; revised 4/21/06; accepted 5/ 4/06.
<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=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/rarrow.gif" =

    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://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#top"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Top<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#ABS"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Abstract<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#SEC1"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Materials and Methods<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#SEC2"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.aacrjournals.org/icons/toc/uarrow.gif" =
width=3D11=20
      border=3D0>Results<BR></A><A=20
      =
href=3D"http://clincancerres.aacrjournals.org/cgi/content/full/12/15/4730=
#SEC3"><IMG=20
      height=3D9 alt=3D" " hspace=3D5=20
      src=3D"http://clincancerres.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://clincancerres.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=
sp;<BR>
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------=_NextPart_000_0000_01C87561.37926E40
Content-Type: application/octet-stream
Content-Transfer-Encoding: quoted-printable
Content-Location: http://clincancerres.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_0000_01C87561.37926E40
Content-Type: application/octet-stream
Content-Transfer-Encoding: quoted-printable
Content-Location: http://clincancerres.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=
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}=0A=

------=_NextPart_000_0000_01C87561.37926E40
Content-Type: application/octet-stream
Content-Transfer-Encoding: quoted-printable
Content-Location: http://clincancerres.aacrjournals.org/javascript/entrez/callback.js

/************************************************************************=
*****=0A=
 * javascript/entrez/callback.js=0A=
 *=0A=
 * Entrez Linking callback to populate content box.=0A=
 *=0A=
 * 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=
 */=0A=
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=
   * the callback until we can track down a proper fix=0A=
   * (or everybody sanely upgrades to version 6 or 7!).=0A=
   */=0A=
  if (navigator) {=0A=
    var appname =3D navigator.appName;=0A=
    if (appname =3D=3D "Microsoft Internet Explorer") {=0A=
      var userAgent =3D navigator["userAgent"];=0A=
      var s =3D "MSIE ";=0A=
      var n =3D -1;      =0A=
      if ((n =3D userAgent.indexOf(s)) !=3D -1) {=0A=
        var v =3D parseFloat(userAgent.substring(n+s.length));=0A=
        if (v < 6) {=0A=
          return;=0A=
        }=0A=
      }=0A=
    }=0A=
  }=0A=
=0A=
  /*=0A=
   * Acquire table row element to update, initiate callback=0A=
   * to update table with Entrez Links.=0A=
   */=0A=
  var tr =3D document.getElementById('entrez_callback_'+pmid);=0A=
  if (!tr) {=0A=
    return;=0A=
  }=0A=
  var req =3D new XMLHttpRequest();=0A=
  if (!req) {=0A=
    return;=0A=
  }=0A=
  req.onreadystatechange =3D function() {=0A=
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=3D=3D 304)) {=0A=
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      	copy_xml_to_html(src.childNodes[i], dst);=0A=
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      var tbl =3D tr.parentNode;=0A=
      tbl.replaceChild(dst, tr);=0A=
    }=0A=
  }=0A=
  req.open('GET', callback_url, true);=0A=
  req.send(null);=0A=
}=0A=

------=_NextPart_000_0000_01C87561.37926E40
Content-Type: application/octet-stream
Content-Transfer-Encoding: quoted-printable
Content-Location: http://www.google-analytics.com/urchin.js

//-- Google Analytics Urchin Module=0A=
//-- Copyright 2007 Google, All Rights Reserved.=0A=
=0A=
//-- Urchin On Demand Settings ONLY=0A=
var _uacct=3D"";			// set up the Urchin Account=0A=
var _userv=3D1;			// service mode (0=3Dlocal,1=3Dremote,2=3Dboth)=0A=
=0A=
//-- UTM User Settings=0A=
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=
var _utimeout=3D"1800";   	// set the inactive session timeout in seconds=0A=
var _ugifpath=3D"/__utm.gif";	// set the web path to the __utm.gif file=0A=
var _utsp=3D"|";			// transaction field separator=0A=
var _uflash=3D1;			// set flash version detect option (1=3Don|0=3Doff)=0A=
var _utitle=3D1;			// set the document title detect option =
(1=3Don|0=3Doff)=0A=
var _ulink=3D0;			// enable linker functionality (1=3Don|0=3Doff)=0A=
var _uanchor=3D0;			// enable use of anchors for campaign =
(1=3Don|0=3Doff)=0A=
var _utcp=3D"/";			// the cookie path for tracking=0A=
var _usample=3D100;		// The sampling % of visitors to track (1-100).=0A=
=0A=
//-- UTM Campaign Tracking Settings=0A=
var _uctm=3D1;			// set campaign tracking module (1=3Don|0=3Doff)=0A=
var _ucto=3D"15768000";		// set timeout in seconds (6 month default)=0A=
var _uccn=3D"utm_campaign";	// name=0A=
var _ucmd=3D"utm_medium";		// medium (cpc|cpm|link|email|organic)=0A=
var _ucsr=3D"utm_source";		// source=0A=
var _uctr=3D"utm_term";		// term/keyword=0A=
var _ucct=3D"utm_content";	// content=0A=
var _ucid=3D"utm_id";		// id number=0A=
var _ucno=3D"utm_nooverride";	// don't override=0A=
=0A=
//-- Auto/Organic Sources and Keywords=0A=
var _uOsr=3Dnew Array();=0A=
var _uOkw=3Dnew Array();=0A=
_uOsr[0]=3D"google";	_uOkw[0]=3D"q";=0A=
_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"q";=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"szukaj";	_uOkw[27]=3D"szukaj";=0A=
_uOsr[28]=3D"szukaj";	_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=
=0A=
=0A=
//-- Auto/Organic Keywords to Ignore=0A=
var _uOno=3Dnew Array();=0A=
//_uOno[0]=3D"urchin";=0A=
//_uOno[1]=3D"urchin.com";=0A=
//_uOno[2]=3D"www.urchin.com";=0A=
=0A=
//-- Referral domains to Ignore=0A=
var _uRno=3Dnew Array();=0A=
//_uRno[0]=3D".urchin.com";=0A=
=0A=
//-- **** Don't modify below this point ***=0A=
var =
_uff,_udh,_udt,_ubl=3D0,_udo=3D"",_uu,_ufns=3D0,_uns=3D0,_ur=3D"-",_ufno=3D=
0,_ust=3D0,_ubd=3Ddocument,_udl=3D_ubd.location,_udlh=3D"",_uwv=3D"1";=0A=
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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 var nx=3D" expires=3D"+_uNx()+";";=0A=
 var dc=3D_ubd.cookie;=0A=
 _udh=3D_uDomain();=0A=
 if (!_uVG()) return;=0A=
 _uu=3DMath.round(Math.random()*2147483647);=0A=
 _udt=3Dnew Date();=0A=
 _ust=3DMath.round(_udt.getTime()/1000);=0A=
 a=3Ddc.indexOf("__utma=3D"+_udh);=0A=
 b=3Ddc.indexOf("__utmb=3D"+_udh);=0A=
 c=3Ddc.indexOf("__utmc=3D"+_udh);=0A=
 if (_udn && _udn!=3D"") { _udo=3D" domain=3D"+_udn+";"; }=0A=
 if (_utimeout && _utimeout!=3D"") {=0A=
  x=3Dnew Date(_udt.getTime()+(_utimeout*1000));=0A=
  x=3D" expires=3D"+x.toGMTString()+";";=0A=
 }=0A=
 if (_ulink) {=0A=
  if (_uanchor && _udlh && _udlh!=3D"") s=3D_udlh+"&";=0A=
  s+=3D_udl.search;=0A=
  if(s && s!=3D"" && s.indexOf("__utma=3D")>=3D0) {=0A=
   if (!(_uIN(a=3D_uGC(s,"__utma=3D","&")))) a=3D"-";=0A=
   if (!(_uIN(b=3D_uGC(s,"__utmb=3D","&")))) b=3D"-";=0A=
   if (!(_uIN(c=3D_uGC(s,"__utmc=3D","&")))) c=3D"-";=0A=
   v=3D_uGC(s,"__utmv=3D","&");=0A=
   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=
   if (a!=3D"-" && b!=3D"-" && c!=3D"-") f=3D1;=0A=
   else if(a!=3D"-") f=3D2;=0A=
  }=0A=
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 if(f=3D=3D1) {=0A=
  _ubd.cookie=3D"__utma=3D"+a+"; path=3D"+_utcp+";"+nx+_udo;=0A=
  _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=
  _ubd.cookie=3D"__utmb=3D"+_udh+"; path=3D"+_utcp+";"+x+_udo;=0A=
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  if (a>=3D0) a=3D_uFixA(_ubd.cookie,";",_ust);=0A=
  else a=3D_udh+"."+_uu+"."+_ust+"."+_ust+"."+_ust+".1";=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=
 }=0A=
 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=
 _uInfo(page);=0A=
 _ufns=3D0;=0A=
 _ufno=3D0;=0A=
 if (!page || page=3D=3D"") _uff=3D1;=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=
 }=0A=
 s+=3D"&utmn=3D"+_uu;=0A=
 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=
 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=
 }=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=
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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=
 }=0A=
 z=3Ddc.indexOf("__utmz=3D"+_udh);=0A=
 if (z>-1) { z=3D_uGC(dc,"__utmz=3D"+_udh,";"); }=0A=
 else { z=3D"-"; }=0A=
 t=3D_uGC(s,_ucid+"=3D","&");=0A=
 t2=3D_uGC(s,_ucsr+"=3D","&");=0A=
 t3=3D_uGC(s,"gclid=3D","&");=0A=
 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=
  else c+=3D"|utmccn=3D(not+set)";=0A=
  t=3D_uGC(s,_ucmd+"=3D","&");=0A=
  if (t!=3D"-" && t!=3D"") c+=3D"|utmcmd=3D"+_uEC(t);=0A=
  else  c+=3D"|utmcmd=3D(not+set)";=0A=
  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=
  if (t!=3D"-" && t!=3D"") c+=3D"|utmcct=3D"+_uEC(t);=0A=
  t=3D_uGC(s,_ucno+"=3D","&");=0A=
  if (t=3D=3D"1") o=3D1;=0A=
  if (z!=3D"-" && o=3D=3D1) return "";=0A=
 }=0A=
 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=
  if (c=3D=3D"-" || c=3D=3D"") return "";=0A=
 }=0A=
 if (z!=3D"-") {=0A=
  i=3Dz.indexOf(".");=0A=
  if (i>-1) i=3Dz.indexOf(".",i+1);=0A=
  if (i>-1) i=3Dz.indexOf(".",i+1);=0A=
  if (i>-1) i=3Dz.indexOf(".",i+1);=0A=
  t=3Dz.substring(i+1,z.length);=0A=
  if (t.toLowerCase()=3D=3Dc.toLowerCase()) cs=3D1;=0A=
  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=
  }=0A=
 }=0A=
 if (cs=3D=3D0 || _ufns=3D=3D1) {=0A=
  t=3D_uGC(dc,"__utma=3D"+_udh,";");=0A=
  if ((i=3Dt.lastIndexOf(".")) > 9) {=0A=
   _uns=3Dt.substring(i+1,t.length);=0A=
   _uns=3D(_uns*1);=0A=
  }=0A=
  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) 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) 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 _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 ((_userv=3D=3D0 || _userv=3D=3D2) && _uSP()) {=0A=
   i[ii]=3Dnew Image(1,1);=0A=
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  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=
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}=0A=
function _uFlash() {=0A=
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   try {=0A=
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 return f;=0A=
}=0A=
function __utmLinker(l,h) {=0A=
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 var p,k,a=3D"-",b=3D"-",c=3D"-",x=3D"-",z=3D"-",v=3D"-";=0A=
 var dc=3D_ubd.cookie;=0A=
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 var iq =3D l.indexOf("?"); =0A=
 var ih =3D l.indexOf("#"); =0A=
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  x=3D_uES(_uGC(dc,"__utmx=3D"+_udh,";"));=0A=
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  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=
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  if (h) { _udl.href=3Dl+"#"+p; }=0A=
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   else if (iq=3D=3D-1) =
_udl.href=3Dl.substring(0,ih-1)+"?"+p+l.substring(ih);=0A=
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}=0A=
function __utmLinkPost(f,h) {=0A=
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 var ih =3D f.action.indexOf("#"); =0A=
 if (dc) {=0A=
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  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=
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  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=
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 if (p) {=0A=
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  if (h) { f.action+=3D"#"+p; }=0A=
  else {=0A=
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   else if (iq=3D=3D-1) =
f.action=3Df.action.substring(0,ih-1)+"?"+p+f.action.substring(ih);=0A=
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f.action=3Df.action.substring(0,ih-1)+"&"+p+f.action.substring(ih);=0A=
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 return;=0A=
}=0A=
function __utmSetVar(v) {=0A=
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  if (_udn && _udn!=3D"") { _udo=3D" domain=3D"+_udn+";"; }=0A=
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 if (!_uVG()) return;=0A=
 var r=3DMath.round(Math.random() * 2147483647);=0A=
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expires=3D"+_uNx()+";"+_udo;=0A=
 var s=3D"&utmt=3Dvar&utmn=3D"+r;=0A=
 if ((_userv=3D=3D0 || _userv=3D=3D2) && _uSP()) {=0A=
  var i=3Dnew Image(1,1);=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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}=0A=
function _uGCS() {=0A=
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c+=3D_uES("__utma=3D"+t+";+");=0A=
 if ((t=3D_uGC(dc,"__utmb=3D"+_udh,";"))!=3D"-") =
c+=3D_uES("__utmb=3D"+t+";+");=0A=
 if ((t=3D_uGC(dc,"__utmc=3D"+_udh,";"))!=3D"-") =
c+=3D_uES("__utmc=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=
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}=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=
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 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=
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 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=
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 }=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=
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  _uns=3D(_uns*1)+1;=0A=
  a=3Da.substring(0,i);=0A=
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   lt=3Da.substring(i+1,a.length);=0A=
   a=3Da.substring(0,i);=0A=
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  if ((i=3Da.lastIndexOf(".")) > 5) {=0A=
   a=3Da.substring(0,i);=0A=
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  a+=3D"."+lt+"."+t+"."+_uns;=0A=
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 return a;=0A=
}=0A=
function _uTrim(s) {=0A=
  if (!s || s=3D=3D"") return "";=0A=
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(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=
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}=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 =
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 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=
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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=
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 }=0A=
 return true;=0A=
}=0A=
function _uES(s,u) {=0A=
 if (typeof(encodeURIComponent) =3D=3D 'function') {=0A=
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 } else {=0A=
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}=0A=
function _uUES(s) {=0A=
 if (typeof(decodeURIComponent) =3D=3D 'function') {=0A=
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 } else {=0A=
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}=0A=
function _uVG() {=0A=
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=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=
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function urchinPathCopy(p){=0A=
 var d=3Ddocument,nx,tx,sx,i,c,cs,t,h,o;=0A=
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 for (i=3D0;i<6;i++){=0A=
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t+=3Dsx; else t+=3Dnx;=0A=
  c=3D_uGC(d.cookie,"__utm"+cs[i]+"=3D"+h,";");=0A=
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}=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=
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 var sc=3Ddocument.createElement('script');=0A=
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sc.src=3D'https://'+d+'/analytics/reporting/overlay_js?gaso=3D'+_utk+'&'+=
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function _uGT() {=0A=
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  a=3D_uGC(_ubd.cookie,"GASO=3D",";");=0A=
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 return a;=0A=
}=0A=
var _utk=3D_uGT();=0A=
if (_utk && _utk!=3D"" && _utk.length>10) {=0A=
 if (window.addEventListener) {=0A=
  window.addEventListener('load', _uCO, false); =0A=
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}=0A=
=0A=
function _uNx() {=0A=
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}=0A=

------=_NextPart_000_0000_01C87561.37926E40--

