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INF-γ基因+874位点SNP对肺结核易感性及蛋白分泌的影响

, PP. 69-72

Keywords: 干扰素-γ,单核苷酸多态性,肺结核,易感性

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Abstract:

目的探讨干扰素-γ(IFN-γ)基因+874位点单核苷酸多态性(SNP)与肺结核易感性的关系,以及对IFN-γ分泌水平的影响。方法应用TaqMan探针基因分型技术,采用病例-对照研究方法,对142例肺结核患者和166例健康对照人群IFN-γ基因+874位点进行分型,比较两组人群等位基因频率差异,并测定不同基因型人群外周血浆以及PBMC分泌IFN-γ水平的差异,明确基因型与IFN-γ分泌水平的关系。结果IFN-γ基因+874位点具有T和A两种等位基因,其中结核组A、T等位基因频率分别为88.0%、12.0%,对照组A、T等位基因频率分别为81.0%、19.0%,两组差异具有统计学意义(P0.05)。PBMC经过结核菌裂解物刺激后,TT基因型细胞上清IFN-γ为(754.8±102.9)pg/mL,显著高于AA基因型(648.9±80.83)pg/mL,差异有统计学意义(P结论IFN-γ基因+874多态性位点与结核病易感性相关,A等位基因是肺结核易感基因;IFN-γ基因+874多态性影响宿主IFN-γ表达水平,在调节肺结核保护性免疫过程中起重要作用。

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