Functional polymorphisms of cyclooxygenase-2 (COX-2) gene and risk for urinary bladder cancer in North India

Surgery
Ruchika GangwarRama D Mittal

Abstract

Cyclooxygenase-2 (COX-2) is an enzyme involved in the synthesis of prostaglandins and thromboxanes, which are regulators of processes that are relevant to cancer development. It is involved in carcinogenesis, immune response suppression, apoptosis inhibition, angiogenesis, and tumor cell invasion and metastasis. The gene for COX-2, designated as prostaglandin-endoperoxide synthase 2 (PTGS-2), carries polymorphisms, such as -765G>C, 1195G>A in the promoter region, and 8473T>C in the 3'-untranslated region (UTR), which have been associated with susceptibility to malignant disease. We undertook a case-control study of 212 urothelial bladder cancer (UBC) cases and 250 controls to investigate the association between COX-2 polymorphism and bladder cancer susceptibility, using the polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) method and also investigated gene-environment interactions. Cox-2 765G>C, a variant(C) allele carrier, was at an increased risk of UBC (odds ratio [OR] = 1.90; P = .004); however, -1195G>A; -1290A>G; and 3'UTR 8473T>C polymorphisms of COX-2 gene were not significantly associated with UBC. 765G>C also was associated with the invasive stage of a bladder tumor (OR = 2.73; P = .033). H...Continue Reading

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