中文摘要：

目的探讨GSTP1和RASSF1A基因多态性及环境因素和前列腺癌易感性之间的关系。方法采用TaqMan/MGB探针基因分型方法对103例前列腺癌患者和103例正常对照的中国汉族人群基因组DNA进行GSTP1和RASSF1A基因多态性检测,并结合环境因素应用多因素Logistic回归分析吸烟、饮酒、饮茶、猪肉和牛肉每周实际摄入量及各位点基因型与前列腺癌易感性之间的关系。结果GSTP1基因型AA、AG、GG在前列腺癌和对照人群中的比例分别为66.02%、22.33%、11.65%和67.96%、29.13%、2.91%,有统计学差异（χ2=6.35,P=0.04）;RASSF1A基因型CC、CA、AA在前列腺癌和对照人群中的比例分别为88.34%,5.83%,5.83%和85.44%,12.62%,1.94%,无统计学差异（χ2=4.63,P=0.10）。多因素Logistic回归分析显示,饮茶者患前列腺癌的危险性是不饮茶者的0.40倍（95%CI,0.19～0.82）,吸烟者患前列腺癌的危险性是不吸烟者的3.02倍（95%CI,1.44～6.32）。结论GSTP1和RASSF1A的基因多态性和中国汉族人群前列腺癌的发生无相关性;吸烟是前列腺癌的危险因素,饮茶是保护因素。

英文摘要：

Objective To investigate relationship of GSTP1,RASSF1A polymorphisms and environmental agent with susceptibility to prostate cancer （ Pca）. Methods The GSTP1 and RASSF1A genotypes were determined by TaqMan/MGB Probe Technology in 103 patients with Pca and 103 normal controls. Multivariate logistic regression model was used to assess the association of smoking,alcohol drinking,tea drinking,weekly pork and beef consumption,and the genetic polymorphisms with the susceptibility to Pca,while taking into consideration of the environmental agent. Results The frequencies of the GSTP1 AA,AG and GG genotypes were 66. 02% ,22. 33% ,and 11. 65% in patients with Pca and 67. 96% ,29. 13% and 2. 91% in controls,respectively,with significant difference found between the two groups （ χ2 = 6. 35,P = 0. 04）. The frequencies of RASSF1A CC,CA and AA genotypes were 88. 34% ,5. 83% ,and 5. 83% in patients with Pca,and 85. 44% ,12. 62% ,and 1. 94% in the controls,respectively,with no significant difference found between the two groups （ χ2 = 4. 63,P = 0. 10）. Multivariate analysis showed a decreased risk in those who had a tea drinking history （ OR = 0. 40,95% CI,0. 19 -0. 82） and an increased risk in those who had a smoking history （ OR = 3. 02,95% CI,1. 44 -6. 32）. Conclusion Our results indicate that GSTP1,RASSF1A polymorphisms are not associated with Pca susceptibility in Chinese Han nationality. Smoking is the risk factor of Pca,and tea drinking is a protective factor against Pca.