| Literature DB >> 19969511 |
Kristin Snipstad1, Christopher G Fenton, Jørn Kjaeve, Guanglin Cui, Endre Anderssen, Ruth H Paulssen.
Abstract
Patients with locally advanced rectal cancer often receive preoperative radio-chemotherapy (RCT). The mechanisms of tumour response to radiotherapy are not understood. The aim of this study was to identify the effects of RCT on gene expression in rectal tumour and normal rectal tissue. For that purpose tissue samples from 21 patients with resectable adenocarcinomas were collected for use in whole genome-microarray based gene expression analysis. A factorial experimental design allowed us to determine the effect of RCT on tumour tissue alone by removing the effect of radiation on normal tissue. This resulted in 1327 differentially expressed genes in tumour tissue with p<0.05. In addition to known markers for radio-chemotherapy, a Gene Set Enrichment Analysis (GSEA) showed a significant enrichment in gene sets associated with cell adhesion and leukocyte transendothelial migration. The profound change of cell adhesion molecule expression in rectal tumour tissue could either increase the risk of metastasis, or decrease the tumour's invasive potential.Entities:
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Year: 2009 PMID： 19969511 PMCID： PMC5527962 DOI： 10.1016/j.molonc.2009.11.002
Source DB: PubMed Journal: Mol Oncol ISSN： 1574-7891 Impact factor: 6.603