Genome-wide expression patterns of invasion front, inner tumor mass and surrounding normal epithelium of colorectal tumors
<p>Abstract</p> <p>Colorectal tumors have characteristic genome-wide expression patterns that allow their distinction from normal colon epithelia and facilitate clinical prognosis. The expression heterogeneity within a primary colorectal tumor has not been studied on a genome scale...
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2007-12-01
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Series: | Molecular Cancer |
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doaj-ca435cccb20e4d30ae35c9193fb890e02020-11-24T21:46:03ZengBMCMolecular Cancer1476-45982007-12-01617910.1186/1476-4598-6-79Genome-wide expression patterns of invasion front, inner tumor mass and surrounding normal epithelium of colorectal tumorsPilarsky ChristianCastanos-Velez EsmeraldaHinzmann BerndKlaman IrinaRoepcke StefanMennerich DetlevHeinze MayaGroene JoernStaub EikeMann BennoBrümmendorf ThomasWeber BirgitBuhr Heinz-JohannesRosenthal André<p>Abstract</p> <p>Colorectal tumors have characteristic genome-wide expression patterns that allow their distinction from normal colon epithelia and facilitate clinical prognosis. The expression heterogeneity within a primary colorectal tumor has not been studied on a genome scale yet. Here we investigated three compartments of colorectal tumors, the invasion front, the inner tumor mass, and surrounding normal epithelial tissue by microdissection and microarray-based expression profiling. In both tumor compartments many genes were differentially expressed when compared to normal epithelium. The sets of significantly deregulated genes in both compartments overlapped to a large extent and revealed various interesting known and novel pathways that could have contributed to tumorigenesis. Cells from the invasion front and inner tumor mass, however, did not show significant differences in their expression profile, neither on the single gene level nor on the pathway level. Instead, gene expression differences between individuals are more pronounced as all patient-matched tumor samples clustered in close proximity to each other. With respect to invasion front and inner tumor mass we conclude that the specific tumor cell micro-environment does not have a strong influence on expression patterns: largely similar genome-wide expression programs operate in the invasion front and interior compartment of a colorectal tumor.</p> http://www.molecular-cancer.com/content/6/1/79 |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Pilarsky Christian Castanos-Velez Esmeralda Hinzmann Bernd Klaman Irina Roepcke Stefan Mennerich Detlev Heinze Maya Groene Joern Staub Eike Mann Benno Brümmendorf Thomas Weber Birgit Buhr Heinz-Johannes Rosenthal André |
spellingShingle |
Pilarsky Christian Castanos-Velez Esmeralda Hinzmann Bernd Klaman Irina Roepcke Stefan Mennerich Detlev Heinze Maya Groene Joern Staub Eike Mann Benno Brümmendorf Thomas Weber Birgit Buhr Heinz-Johannes Rosenthal André Genome-wide expression patterns of invasion front, inner tumor mass and surrounding normal epithelium of colorectal tumors Molecular Cancer |
author_facet |
Pilarsky Christian Castanos-Velez Esmeralda Hinzmann Bernd Klaman Irina Roepcke Stefan Mennerich Detlev Heinze Maya Groene Joern Staub Eike Mann Benno Brümmendorf Thomas Weber Birgit Buhr Heinz-Johannes Rosenthal André |
author_sort |
Pilarsky Christian |
title |
Genome-wide expression patterns of invasion front, inner tumor mass and surrounding normal epithelium of colorectal tumors |
title_short |
Genome-wide expression patterns of invasion front, inner tumor mass and surrounding normal epithelium of colorectal tumors |
title_full |
Genome-wide expression patterns of invasion front, inner tumor mass and surrounding normal epithelium of colorectal tumors |
title_fullStr |
Genome-wide expression patterns of invasion front, inner tumor mass and surrounding normal epithelium of colorectal tumors |
title_full_unstemmed |
Genome-wide expression patterns of invasion front, inner tumor mass and surrounding normal epithelium of colorectal tumors |
title_sort |
genome-wide expression patterns of invasion front, inner tumor mass and surrounding normal epithelium of colorectal tumors |
publisher |
BMC |
series |
Molecular Cancer |
issn |
1476-4598 |
publishDate |
2007-12-01 |
description |
<p>Abstract</p> <p>Colorectal tumors have characteristic genome-wide expression patterns that allow their distinction from normal colon epithelia and facilitate clinical prognosis. The expression heterogeneity within a primary colorectal tumor has not been studied on a genome scale yet. Here we investigated three compartments of colorectal tumors, the invasion front, the inner tumor mass, and surrounding normal epithelial tissue by microdissection and microarray-based expression profiling. In both tumor compartments many genes were differentially expressed when compared to normal epithelium. The sets of significantly deregulated genes in both compartments overlapped to a large extent and revealed various interesting known and novel pathways that could have contributed to tumorigenesis. Cells from the invasion front and inner tumor mass, however, did not show significant differences in their expression profile, neither on the single gene level nor on the pathway level. Instead, gene expression differences between individuals are more pronounced as all patient-matched tumor samples clustered in close proximity to each other. With respect to invasion front and inner tumor mass we conclude that the specific tumor cell micro-environment does not have a strong influence on expression patterns: largely similar genome-wide expression programs operate in the invasion front and interior compartment of a colorectal tumor.</p> |
url |
http://www.molecular-cancer.com/content/6/1/79 |
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