【摘要】 目的 :探讨Fc受体γ链基因启动子区 - 2 9位点基因多态现象在中国南方人群中的分布及其与系统性红斑狼疮 (SLE)易感性和临床表现的关系。方法 :采用PCR -RFLP方法检测 180例SLE患者和 14 0例正常对照组Fc受体γ链基因启动子区 - 2 9位点基因型。结果 :SLE患者Fc受体γ链基因启动子区 - 2 9位点TT基因型频率(33 3% )及T等位基因频率 (5 4 4 % )明显高于正常对照组 (17 2 %及 4 2 9% ) (P <0 0 5 ) ,而GG基因型频率 (2 4 4 % )及G等位基因频率 (4 5 6 % )明显低于正常对照组 (31 4 %及 5 7 1% ) (P <0 0 5 )。T等位基因的比值比为 1 5 9。SLE患者各基因型频率及各等位基因频率与狼疮性肾炎 (LN)无相关关系 (P >0 0 5 )。结论 :SLE患者Fc受体γ链基因启动子区 - 2 9位点T等位基因与SLE发病相关但与LN的发生无关。更多还原

【Abstract】 AIM: To detect the association between the polymorphism of Fc receptor γ chain gene at position-29 in promoter and systemic lupus erythematosus(SLE). METHODS: The genotypes at position -29 in promoter of Fc receptor γ chain gene were determined by polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP) method in 180 patients with SLE and 140 ethnically matched controls in southern China. RESULTS: The frequencies of TT genotype(33.3%) and T allele (54 4%) at position -29 in patients with SLE were significantly higher than those in controls (17 9%, respectively), whereas, the frequencies of GG genotype (24 4%) and G allele (45 6%) in patients with SLE were remarkably lower than those in controls (31 4% and 57 1%, respectively) ( P< 0 05). The TT genotype and T allele at position -29 were not associated with lupus nephritis in SLE patients ( P> 0 05) . CONCLUSION: Our results indicate that the T allele at position -29 in promoter of Fc receptor gene probably contributes to the susceptibility to SLE, but does not play a role in the occurrence of lupus nephritis.更多还原