Objective To analysis the correlation between three key genes of angiotensin II type 1 receptor (AT,R) gene Al 166C polymorphism, angiotensin I converting enzyme (ACE) gene insertion/deletion (I/D) polymorphism and angiotensinogen (AGT) gene M235T polymorphism in rennin-angiotensin system (RAS) and primary nephrotic syndrome in Zhuang population of West of Guangxi Zhuang Autonomous Region. Methods 112 cases of patients with primary nephrotic syndrome in Zhuang population of West of Guangxi Zhuang Autonomous Region (nephropathy group) and 150 cases of normal controls (control group) were selected for case-control study. Polymerase chain reaction-restriction fragment length polymorphism technique, direct polymerase chain reaction technique and DNA sequencing method were used to detect the RAS ACE gene I/D polymorphism, AT(R gene A1166C polymorphism and AGT gene M235T polymorphism. The distributions of 3 genes polymorphism in the two group were statistically compared. Results The ACE gene I/D polymorphism in the nephropathy group was different from the normal control group, D genotype and D allele in the nephropathy group were accounted for a significant advantage (P < 0.05). The distribution of AT,R A1166C gene and AGT gene M235T polymorphisms between the nephropathy group and the control group had no significant differences (P > 0.05). Conclusion D allele of ACE I/D polymorphism is one of the predisposing factors of primary nephrotic syndrome in Zhuang population of West of Guangxi Zhuang Autonomous Region. This study has not found the relevance between AT,R gene A1166C polymorphisms, AGT gene M235T polymorphisms and primary nephrotic syndrome.%目的 分析桂西地区壮族人肾素-血管紧张素系统中血管紧张素Ⅱ1型受体(AT1R)基因A1166C多态、血管紧张素Ⅰ转化酶(ACE)基因插入/缺失(I/D)多态及血管紧张素原(AGT)基因M235T多态与原发性肾病综合征的相关性.方法 选取112例桂西地区壮族原发性肾病综合征患者(肾病组)及150例正常对照者(对照组)进行病例对照研究,采用聚合酶链反应-限制性片段长度多态性技术、直接聚合酶链反应技术和DNA测序法检测肾素-血管紧张素系统3个主要基因的多态性,并对其在两组的分布情况进行比较.结果肾病组ACE基因I/D多态性与对照组比较差异有统计学意义,D基因型和D等位基因在肾病组中占显著优势(P < 0.05);而AT1R基因A1166C、AGT基因M235T多态在两组中分布差异无统计学意义(P > 0.05).结论 ACE I/D多态的D等位基因是桂西地区壮族人原发性肾病综合征的易感因素之一,但AT1R基因A1166C多态、AGT基因M235T多态可能与原发性肾病综合征的发生无明确关联.
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