Transcriptomics

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Comparative study of gene expression in human colorectal cancer tissues and normal mucosa


ABSTRACT: The purpose of our study was to better understand the genetic mechanism of oncogenesis for human colorectal cancer and to identify potential new tumour markers of use in clinical practice. Results: Comparing cancerous tissues with normal colonic mucosa we identified 584 known genes (3%) differentially expressed to a significant degree (p<0.001). Many of the transcripts that were more abundant in tumours than in non-neoplastic tissues appear to reflect important events for colon carcinogenesis. For example, a significant number of these genes serve as apoptotic inhibitors (e.g. BFAR, BIRC1, BIRC6). Furthermore, we observed the simultaneous upregulation of HLA-E and the downregulation of b2-microglobulin; these genes strongly support a potential tumour escape strategy from immune surveillance in colon cancer tissues. Conclusions: Our study provides new gene candidates in the pathogenesis of human CRC disease. From our results we hypothesise that CRC cells escape immune surveillance through a specific gene expression alteration; moreover, overexpression of several survival genes seems to confer a more anti-apoptotic phenotype. These genes are involved in pathways not previously implicated in CRC pathogenesis and they may provide new targets for therapy. Keywords: disease state analysis

ORGANISM(S): Homo sapiens

PROVIDER: GSE3294 | GEO | 2006/03/01

SECONDARY ACCESSION(S): PRJNA92801

REPOSITORIES: GEO

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