TY - JOUR T1 - The Role of <em>XRCC6</em> T-991C Functional Polymorphism in Renal Cell Carcinoma JF - Anticancer Research JO - Anticancer Res SP - 3855 LP - 3860 VL - 32 IS - 9 AU - WEN-SHIN CHANG AU - HUNG-LUNG KE AU - CHIA-WEN TSAI AU - CHI-SHUN LIEN AU - WEN-LING LIAO AU - HUI-HUI LIN AU - MENG-HSUAN LEE AU - HSI-CHIN WU AU - CHAO-HSIANG CHANG AU - CHI-CHENG CHEN AU - HONG-ZIN LEE AU - DA-TIAN BAU Y1 - 2012/09/01 UR - http://ar.iiarjournals.org/content/32/9/3855.abstract N2 - Background: The DNA non-homologous end-joining repair gene XRCC6 (Ku70) plays a key role in both the DNA double-strand break (DSB) repair and cell cycle arrest. Defects in DSB repair capacity can lead to genomic instability. We hypothesized that a variant in the XRCC6 gene was associated with susceptibility to renal cell carcinoma (RCC). Materials and Methods: In a hospital-based case–control study of 92 patients with RCC and 580 cancer-free controls, the frequency matched by age and sex, the associations of XRCC6 promoter T-991C (rs5751129), promoter G-57C (rs2267437), promoter A-31G (rs132770), and intron 3 (rs132774) polymorphisms with RCC risk were investigated in a Taiwanese population. At the same time, 30 adjacent renal tissue samples were tested to estimate the XRCC6 mRNA expression by real-time quantitative reverse transcription. Results: Compared with the TT genotype, the TC genotype had a significantly increased risk of RCC [adjusted odds ratio=2.24, 95% confidence interval=1.25-4.08, p=0.0175]. The in vivo mRNA expression in renal tissues revealed a statistically significant lower XRCC6 mRNA expression in samples with TC/CC genotypes compared to those with the TT genotype (p=0.0039). Conclusion: These evidence suggests that the XRCC6 T-991C genotype together with its mRNA expression are involved in the etiology of RCC and may be a marker for susceptibility to RCC in the population of Taiwan. ER -