Interaction between polymorphisms of DNA repair genes significantly modulated bladder cancer risk.

Interaction between polymorphisms of DNA repair genes significantly modulated bladder cancer risk.
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DNA 修复基因多态性之间的相互作用显着调节膀胱癌风险

DOI:
10.7150/ijms.4799
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发表时间:
2012
影响因子:
3.6
通讯作者:
Yang J
Yang J
中科院分区:
医学4区
文献类型:
--
作者:
Zhi Y;Yu J;Liu Y;Wei Q;Yuan F;Zhou X;Song B;Chen Z;Yang J

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DNA修复是抵抗外源性和内源性损伤的主要防御机制。我们在302例膀胱癌发病病例和311例医院对照中检测了膀胱癌与5个基因的7个多态性之间的关系,这些基因涉及维持遗传稳定性(MMR:MLH 1 - 93 G>A; BER:XRCC 1 - 77 T>C和Arg 399 Gln; NER:XPC Lys 939 Gln和PAT +/-; DSBR:ATM G5557 A和XRCC 7 G6721 T)。采用聚合酶链反应-限制性片段长度多态性(PCR-RFLP)技术进行基因分型。XRCC 7 G6721 T的纯合变体(比值比[OR]:2.36; 95%置信区间[CI]:1.13-4.92)与膀胱癌风险增加相关。在联合基因型分析中,XRCC 1Arg 399 Gln(Gln等位基因)与XRCC 1 -77 T/T联合导致风险增加(OR:1.61; 95%CI:1.10-2.36)。此外,当XPCLys 939 Gln(Gln等位基因)(核苷酸切除修复[NER])与XRCC 7(T等位基因)(双链断裂修复[DSBR])一起存在时,膀胱癌风险显著增加(OR:4.42; 95%CI:1.23-15.87)。我们的研究结果表明,尽管存在种族差异,但膀胱癌易感性中涉及的DNA修复途径存在多基因变异。
DNA repair is a primary defense mechanism against damage caused by exogenous and endogenous sources. We examined the associations between bladder cancer and 7 polymorphisms from 5 genes involved in the maintenance of genetic stability (MMR: MLH1-93G>A; BER: XRCC1--77T>C and Arg399Gln; NER:XPC Lys939Gln and PAT +/-; DSBR:ATM G5557A and XRCC7 G6721T) in 302 incident bladder cancer cases and 311 hospital controls. Genotyping was done using a polymerase chain reaction restriction fragment length polymorphism (PCR-RFLP) technique. The homozygous variant of XRCC7 G6721T (Odds Ratio [OR]: 2.36; 95% Confidence Interval [CI]: 1.13-4.92) was associated with increased bladder cancer risk. In an analysis of combined genotypes, the combination of XRCC1Arg399Gln (Gln allele) with XRCC1-77 T/T led to an increase in risk (OR: 1.61; 95% CI: 1.10-2.36). Moreover, when the XPCLys939Gln (Gln allele) (nucleotide excision repair [NER]) was present together with XRCC7 (T allele) (double strand break repair [DSBR]), the bladder cancer risk dramatically increased (OR: 4.42; 95% CI: 1.23-15.87). Our results suggest that there are multigenic variations in the DNA repair pathway involved in bladder cancer susceptibility, despite the existence of ethnic group differences.
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