目的:探讨致癌物CYP1A1和NAT2基因多态性对肾癌易感性的影响。方法:利用限制性片段长度多态性-聚合酶链反应(RFLP—PCR)方法,检测病例和对照组细胞色素P450酶基因CYP1A1MspI位点和N-乙酰基转移酶2(NAT2)基因的多态性情况。结果:与对照组相比,病例组CYP1A1(w/M)及NAT2(intermediate)基因型分布差异均存在统计学意义(P〈0.05)。携带CYP1A1(W/M)或NAT2(intermediate)基因型的个体患肾癌的危险度升高,比值比(OR)分别达到2.487(1.493~4.142)和1.970(1.128~3.442)。多因素分析结果显示携带CYP1A1(W/M)及NAT2(intermediate)基因型的吸烟个体具有肾癌易感性。结论:CYP1A1(W/M)和NAT2(intermediate)基因型均是肾癌的危险因素,两者存在交互作用,且均与吸烟有协同作用。
Objective: To study the effect of genetic polymorphisms of cytochrome P4501A1 (CYP1A1), N- aeetyltransferase 2 (NAT2) on the susceptibility to renal cancer. Methods: The genetic polymorphisms of CYPIA1 and NAT2 were examined in the renal cancer patients and controls using restriction fragment length polymorphism-polymerase chain reaction (RFLP-PCR) methods. Results: The distribution of CYP1A1 (W/M) and NAT2 (intermediate) genotypes was significantly different between the renal cancer patients ancl controls (P〈0.05). Individuals carrying CYP1A1 (W/M) or NAT2 (intermediate) genotypes had an increased risk for renal cancer(OR=2. 487, 95% CI.. 1. 493-4. 142; OR: l. 970, 95% CI.. 1. 128-3. 442,respectively). Multivariate analysis showed increased risk for renal cancer patients carrying CYP1A1 (W/M) or NAT2 (intermediate) genotypes and those who smoke. Conclusion: The genotypes CYP1A1 (W/M) and NAT2 (intermediate) are the risk factors of renal cancer, and the 2 genotypes have a interactive effect and both have a joint effect with smoking.