Cyclin D1 G870A polymorphism and breast cancer risk: a meta-analysis comprising 9,911 cases and 11,171 controls |
| |
Authors: | Theodoros N Sergentanis Konstantinos P Economopoulos |
| |
Institution: | (1) School of Medicine, National University of Athens, Athens, Greece;(2) Society of Junior Doctors, 5 Menalou, Marousi, Athens, Greece |
| |
Abstract: | Cyclin D1 represents a key molecule in the regulation of cell cycle. CCND1 G870A (rs603965) polymorphism has drawn considerable
attention as the A allele may generate a variant splice product with possible oncogenic actions. A meta-analysis examining
the association between CCND1 G870A polymorphism and breast cancer risk was performed. Separate analyses on Caucasian and
Chinese populations were also implemented. Eligible articles were identified for the period up to July 2010. Pooled odds ratios
(OR) were appropriately derived from fixed-effects or random-effects models. Sensitivity analysis excluding studies whose
genotype frequencies in controls significantly deviated from Hardy–Weinberg Equilibrium (HWE) was performed. Nine case–control
studies on Caucasians (7,304 cases and 8,149 controls) and four case–control studies on Chinese (2,607 cases and 3,022 controls)
were eligible. At the overall analysis the A allele seemed to be associated with elevated breast cancer risk; the effect seemed
to be confined to homozygous carriers (pooled OR = 1.091, 95% CI: 1.008–1.179, P = 0.030, fixed effects) as heterozygous carriers did not exhibit significantly elevated breast cancer risk. No statistically
significant associations were demonstrated in Caucasians. On the other hand, Chinese AA carriers exhibited marginally elevated
breast cancer risk (pooled OR = 1.144, 95% CI: 0.984–1.329, P = 0.080, fixed effects). Nevertheless, the controls in two out of the four Chinese studies deviated from HWE. In conclusion,
this meta-analysis suggests that the A allele of the CCND1 G870A polymorphism may confer additional breast cancer risk when
it comes to homozygosity and Chinese populations. The need for additional, methodologically sound studies on Chinese populations
seems warranted. |
| |
Keywords: | |
本文献已被 PubMed SpringerLink 等数据库收录! |
|