A functional polymorphism C-1310G in the promoter region of Ku70/XRCC6 is associated with risk of renal cell carcinoma.

Abstract:

:The DNA repair gene Ku70 plays a key role in the DNA double strand break (DSB) repair system. Defects in DSB repair capacity can lead to genomic instability. We hypothesized that the Ku70 C-1310G polymorphism (rs2267437) was associated with risk of renal cell carcinoma (RCC). We genotyped the Ku70 C-1310G polymorphism in a case-control study of 620 patients and 623 controls in a Chinese population and assessed the effects of C-1310G polymorphism on RCC susceptibility and survival. We then examined the functionality of this polymorphism. Compared with the Ku70-1310CC genotype, the CG and CG/GG genotypes had a significantly increased risk of RCC [adjusted odds ratio (OR) = 1.47, 95% confidence interval (CI) = 1.16-1.87 for CG and OR = 1.47, 95% CI = 1.16-1.86 for CG/GG]. However, the C-1310G polymorphism did not influence the survival of RCC. The in vivo experiments with normal renal tissues revealed statistically significantly lower Ku70 mRNA expression in samples with CG/GG genotypes relative to those with the CC genotype (P < 0.05). In vitro luciferase assays in various cell lines showed lower luciferase activity for the -1310G allele than for the -1310C allele. These results suggest that the Ku70 C-1310G polymorphism is involved in the etiology of RCC and thus may be a marker for genetic susceptibility to RCC in Chinese populations. Larger studies are warranted to validate our findings.

journal_name

Mol Carcinog

journal_title

Molecular carcinogenesis

authors

Wang W,Pan X,Huo X,Yan F,Wang M,Wang D,Gao Y,Cao Q,Luo D,Qin C,Yin C,Zhang Z

doi

10.1002/mc.21914

subject

Has Abstract

pub_date

2012-10-01 00:00:00

pages

E183-90

eissn

0899-1987

issn

1098-2744

journal_volume

51 Suppl 1

pub_type

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