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目的探讨肿瘤坏死因子TNFα-308G/A和TNFβG252A基因多态性与阿茨海默病(AD)的关系。方法用酶免法测定TNF水平,运用多聚酶链反应技术检测66例阿茨海默病及143例正常人肿瘤坏死因子TNFα-308G/A和TNFβG252A基因多态性。结果AD组肿瘤坏死因子TNFα-308G/A1/1和TNFα-308G/A1/2,TNFα-308G/A2/2表型频率分别为:0.8636,0.1212,0.0152,对照组分别为:0.8881,0.1049,0.070:AD和TNFα-308G/A1,TNF