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Functional promoter -765 G > C variant in COX-2 gene is associated with the susceptibility of breast cancer in Chinese Han women.

Abstract：

BACKGROUND:Cyclooxygenase (COX) is a rate-limiting enzyme in prostaglandins synthesis which exists in two isoforms, COX-1 and COX-2. Over-expression of COX-2 was considered to increase the proliferation and enhance the invasiveness of breast cancer cells. It was suggested that genetic variations in COX-2 could influence its expression. Herein, the present study was aimed to investigate the associations between two mostly studied functional polymorphisms (-765 G > C and 8473 C > T) in COX-2 and breast cancer risk in Chinese Han women. METHODS:In the hospital-based case-control study, 465 breast cancer patients and 799 cancer-free controls were genotyped for the COX-2 -765 G > C and 8473 C > T polymorphisms using TaqMan assay. We estimated odds ratios (ORs) and 95% confidence intervals (95% CIs) using the logistic regression. RESULTS:Compared with the wild genotype of -765 G > C, we found a statistically significant increased risk of breast cancer associated with the variant genotypes [GC/CC vs. GG: OR = 1.56, 95% CI = 1.11-2.21]. In the stratified analysis, the increased risk was more predominant among the subgroups of younger subjects (OR = 1.61, 95% CI = 1.00-2.61). Furthermore, the variant genotypes were associated with large tumor size (OR = 3.01, 95% CI = 1.47-6.12). No significant association was observed for the 8473 C > T polymorphism. CONCLUSIONS:Our results suggest that the functional -765 G > C polymorphism in the promoter of COX-2 may influence the susceptibility and progression of breast cancer in the Chinese Han population.

journal_name

Cancer Cell Int

journal_title

Cancer cell international

authors

Gao J,Kang HF,Ma XB,Tang W,Liu D,Zhao Y,Zhang SQ,Guan HT,Lin S,Ren HT,Wang XJ,Dai ZJ

doi

10.1186/1475-2867-14-38

subject

Has Abstract

pub_date

2014-05-06 00:00:00

pages

38

issn

1475-2867

pii

1475-2867-14-38

journal_volume

14

pub_type

杂志文章

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