中国上海地区汉族人PGC-1α基因多态性与2型糖尿病相关性研究

目的 研究过氧化物酶增殖激活受体-γ共激活子-1α（peroxisome proliferators-activated reeeptor-γ coactivator-1α，PGC-1α）基因单核苷酸多态性（single nucleotide polymorphism，SNP）与2型糖尿病（type 2 diabetes mellitus，T2DM）的关联性。方法 应用聚合酶链反应-限制性内切酶片段长度多态性技术，选择PGC-1α基因4个常见SNPs位点：Thr394Thr（ACG→ACA）、Gly482Ser（GGT→AGT）、Thr612Met（ACG→ATG）和IVS2＋52C→A，对69个T2DM家系（310例）进行基因分型，并用传递不平衡检验（transmission-disequilibrium test，TDT）和同胞传递不平衡检验（sib transmission．disequilibrium，STDT）进行分析。用同样方法在无家族史的156例T2DM患者及111名糖耐量正常者中进行病例-对照关联分析，检验Gly482Ser多态性在散发人群中的分布。结果 （1）经TDT-STDT检验，未发现单个PGC-1α基因SNPs位点在T2DM患病子代中优势传递；（2）在病例-对照关联分析中，Gly482Ser位点多态性在两组人群的分布差异有统计学意义，携带者GA基因型罹患T2DM的危险性可增加1．85倍，且等位基因在两组人群的分布差异有统计学意义（P=0．046）；（3）在无家族史的糖耐量正常者中，Gly482Ser位点的GG基因型的高密度脂蛋白胆固醇、低密度脂蛋白胆固醇和甘油三酯水平与GA＋AA基因型比较，差异有统计学意义（分别为P=0．043，P=0．046，P=0．037）。结论 PGC-1α基因Gly482Ser多态性可能与T2DM的易感性相关。

Study on the relationship between polymorphisms of peroxisome proliferators-activated receptor-γ coactivator-1α gene and type 2 diabetes in Shanghai Hans in China

OBJECTIVE: To observe the association between single nucleotide polymorphism (SNP) of peroxisome proliferators-activated receptor-gamma coactivator-1alpha (PGC-1alpha ) gene and type 2 diabetes mellitus(T2DM). METHODS: Four common SNPs of PGC-1alpha gene were genotyped with polymerase chain reaction-restriction fragment length polymorphism(PCR-RFLP) and then analyzed with transmission-disequilibrium test (TDT) and sib transmission-disequilibrium test (STDT) in 69 T2DM pedigrees (310 individuals). Furthermore, the authors performed a case-control study to genotype Gly482Ser in 156 patients with T2DM and 111 normal glucose tolerance people without family history. RESULTS: (1)There were no positive results in four variances in TDT-STDT analysis(P> 0.05). (2)The Gly482Ser exhibited a significant difference between the two groups. GA genotype carriers were at increased risk for T2DM (OR=1.85), and there was statistically significant difference in the allele frequency between the case and control groups(P=0.046). (3) The subjects with GG genotype at position Gly482Ser had a higher HDL-C and lower LDL-C and TG levels when compared against those with GA+AA genotype in the control group without family history(P=0.043,lzP=0.046, P=0.037 respectively). CONCLUSION: This study suggested that the PGC-1alpha gene might be implicated in the pathogenesis of T2DM. But the studied SNPs in PGC-1alpha gene may not be major susceptibility ones of T2DM mellitus in Han people of Shanghai.