中国维吾尔族男性CYP17基因多态性与前列腺癌发生的关系

目的:探讨维吾尔族男性CYP17基因多态性与前列腺癌发生危险性的关系。方法:收集31例前列腺癌患者和104例对照组的血液标本并提取DNA,设计引物,通过PCR扩增包括基因多态位点的片段,用限制性内切酶M spA1 I进行酶切,产物在2%琼脂糖凝胶上电泳,确定CYP17基因的3种基因型,即A1/A1、A1/A2、A2/A2,并经测序证实,同时测定血清标本中前列腺特异性抗原(PSA)含量。结果:基因型A1/A2、A2/A2频数与A1/A1比较,A1/A2和A2/A2在前列腺癌中的频数与对照组相比,其OR值分别为1.49和2.87,P值分别为0.321和0.052,肿瘤组3种基因型间的PSA值差异无显著性。而对照组中A1/A2组的PSA值高于A1/A1组,但差异无显著性(P=0.062),而A2/A2组显著高于A1/A1组(P=0.018)。结论:A2/A2基因型在前列腺癌中的频数有显著高于对照组的趋势,提示A2/A2基因型可能与维吾尔族男性前列腺癌发生危险性之间有密切关系,而对照组中A2/A2基因型组的PSA值的显著增高也支持了这一观点。

Association between the Polymorphism of CYP17 Gene and Risk of Prostate Cancer in Chinese Vigurs Men

OBJECTIVE: To investigate the association between the polymorphism of CYP17 gene and risk of prostate cancer in Chinese Vigurs men. METHODS: A case-control study including 31 patients with prostate cancer and 104 aged-matched controls was conducted. The polymorphism was investigated by PCR using DNA from peripheral blood lymphocytes. The transition (T-->C) in the risk allele (A2) produced a new recognition site for the restriction enzyme MSPAI I. Three genotypes of CYP17 gene (A1/A1, A1/A2, A2/A2) were determined and confirmed by sequencing. RESULTS: Compared with male A1/A1 genotype, the odds ratios were 1.49 and 2.87 for the A1/A2 and A2/A2 genotypes (P =0.321, 0. 052, respectively). Comparison among 3 subgroups (division by genetypes) of prostate cancer patients, the PSA levels were not significantly different. But in the controls, PSA levels in A1/A2 group were higher but not significant than those in A1/A1 group (P = 0.062). Then, PSA levels in A2/A2 group were significantly higher than those A1/ A1 group (P = 0.018). CONCLUSION: More frequency of A2/A2 genotype in prostate cancer than in the control may be associated with the morbidity of prostate cancer in Vigurs male population. Meanwhile, the significant high PSA levels in A2/A2 group also support the view.