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Cox-2 Polymorphisms in Patients with Familial Adenomatous Polyposis
source: Oncology research
authors: Wilbert H. M. Peters, Rene H. M. te Morsche, Hennie M. J. Roelofs, Elisabeth M. H. Mathus-Vliegen, Fokko M. Nagengast, Marloes Berkhoutsummary/abstract:
Cyclooxygenase-2 (COX-2) is an enzyme involved in the synthesis of prostaglandins and thromboxanes, which are regulators of biologic processes such as inflammation, cell proliferation, and angiogenesis. COX-2 has been found overexpressed in (pre)malignant tissues and may be relevant to cancer development. We investigated whether functional genetic polymorphisms in COX-2 may have a risk-modifying effect on duodenal adenomatosis in patients with familial adenomatous polyposis (FAP). Blood from 85 patients with FAP and 218 age- and sex-matched healthy subjects was investigated for the presence of two functional promoter region polymorphisms (-1195G–>A and -765G–>C) in COX-2. Logistic regression analysis revealed an overrepresentation of the -1195GG genotype compared to the -1195AA genotype in patients with FAP (odds ratio = 2.81; 95% CI = 1.00-7.91, p = 0.042). No associations between single COX-2 polymorphisms or COX-2 haplotype were found when patients were evaluated according to their Spigelman stage. The predicted low COX-2 expression genotype -1195GG was found overrepresented in the patients with FAP. The COX-2 genotypes showed no association with the severity of duodenal adenomatosis.organization: Radboud University Nijmegen Medical Center
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