Alteration of gene expression in normal-appearing colon mucosa of APC(min) mice and human cancer patients

The expression of many genes is altered in colon cancer, but the roles of these genes in carcinogenesis are unclear. Using real-time quantitative PCR, we demonstrated that several genes previously implicated in human colon cancer undergo altered expression in the APC(min) mouse adenomatous polyp, a...

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Bibliographic Details
Published in:Cancer research (Chicago, Ill.) Ill.), 2004-05, Vol.64 (10), p.3694
Main Authors: Chen, Ling-Chun, Hao, Chun-Yi, Chiu, Yanek S Y, Wong, Patrick, Melnick, Jane S, Brotman, Martin, Moretto, John, Mendes, Fredrick, Smith, Andrew P, Bennington, James L, Moore, Dan, Lee, Nancy M
Format: Article
Language:English
Subjects:
Adenomatous Polyposis Coli - genetics
Adenomatous Polyposis Coli - metabolism
Adenomatous Polyposis Coli - pathology
Aged
Animals
Colonic Neoplasms - genetics
Colonic Neoplasms - metabolism
Colonic Neoplasms - pathology
Cyclooxygenase 2
Female
Gene Expression Regulation, Neoplastic
Genes, APC
Humans
Intestinal Mucosa - metabolism
Intestinal Mucosa - pathology
Intestinal Mucosa - physiology
Isoenzymes - biosynthesis
Isoenzymes - genetics
Male
Membrane Proteins
Mice
Mice, Inbred C57BL
Middle Aged
Prostaglandin-Endoperoxide Synthases - biosynthesis
Prostaglandin-Endoperoxide Synthases - genetics
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Summary:The expression of many genes is altered in colon cancer, but the roles of these genes in carcinogenesis are unclear. Using real-time quantitative PCR, we demonstrated that several genes previously implicated in human colon cancer undergo altered expression in the APC(min) mouse adenomatous polyp, a precursor of cancer, as well as in normal-appearing surrounding mucosa. The five genes that were most highly up-regulated in mouse polyp were also significantly up-regulated in polyp-free colon mucosa. Similar changes occurred in morphologically normal mucosa of surgical sections taken from human cancer patients, frequently extending to the margins. Thus, morphologically normal colon mucosa in APC(min) mice and in human cancer patients is not metabolically normal. Altered gene expression in this tissue does not appear to result from a field effect because there was no correlation between extent of altered regulation and distance from polyp or tumor. Our data suggest that alterations of expression levels of these genes may be an early event in carcinogenesis and a marker of risk for the development of colon cancer.
ISSN:0008-5472
DOI:10.1158/0008-5472.CAN-03-3264