目的研究前列腺六次跨膜上皮抗原4(STEAP4)基因多态性与维吾尔族人胰岛素抵抗的关系。方法"研究对象来自新疆和田地区2127例维吾尔族人肥胖等代谢性疾病的横断面调查研究,胰岛素抵抗病例组669例[胰岛素抵抗指数(HOMA-IR)≥2.3 65%],正常对照组664例(HOMA-IR≤1.3 35%)。首先对50例胰岛素抵抗患者(HOMA-IR≥2.3)STEAP4基因的功能区进行测序,根据连锁不平衡(r2>0.8)和最小等位基因频率>5%的原则选择代表性变异在自然人群中行病例对照关联研究。结果"STEAP4基因测序共发现16个变异,其中新发现10个。在关联分析的3个变异中,rs8122(P/Pc=0.004/0.012)和rs1981529(P/Pc=0.015/0.045)与维吾尔族人的胰岛素抵抗表型关联。多元线性回归分析结果显示,rs8122 3种基因型间(GG>GA>AA)的腰围(P/Pc=0.032/0.256)、体重指数(BMI)(P/Pc=0.004/0.032)、HOMA-IR(P/Pc=0.010/0.08)、空腹胰岛素(P/Pc=0.023/0.184)及rs1981529 3种基因型间(AA>AG>GG)的腰围(P/Pc=0.005/0.040)、BMI(P/Pc=0.002/0.016)水平均有逐渐减小趋势。胰岛素抵抗病例组单倍型1(rs8122 G- rs1981529 A- rs34741656 G)的频率明显高于对照组(P=0.021)。结论"STEAP4基因多态性与新疆维吾尔族人的肥胖相关胰岛素抵抗关联。
Objective To explore the relationship between six-transmembrane epithelial antigen of prostate 4 (STEAP4) genetic polymorphisms and insulin resistance (IR) in Uygur Chinese general population. Methods In this cross-sectional study on the metabolic diseases (e.g. obesity) among Uygur Chinese in Hetian, Xinjiang, China,from January to February 2007, 2127 Uygur individuals were enrolled. The sample size for IR subjects [homeostasis model assessment for insulin resistance (HOMA-IR) ≥2.3 65%] was 669, whereas that for non-IR controls was 664 (HOMA-IR≤1.335%). STEAP4 gene was sequenced in 50 Uygur Chinese individuals with IR (HOMA-IR≥2.3). The representative variations were selected from the population based on a r2 cutoff of 0.8 and a minor allele frequency of >5% for case-control study. Results Totally 16 variations including 10 novel variations (no reported in dbSNP) were identified in 50 Uygur individuals with IR. 7414 G/A (rs8122)(P/Pc=0.004/0.012)and 224A/G (rs1981529, Gly75Asp)(P/Pc=0.015/0.045)variations were significantly correlated with IR phenotype in Uygur subjects. As shown by multiple linear regression analysis, the mean values of waist circumference (WC) (P/Pc=0.032/0.256), body mass index (BMI) (P/Pc=0.004/0.032), HOMA-IR (P/Pc=0.010/0.08), and fasting insulin (P/Pc=0.023/0.184) among A (protection) allele carriers of rs8122 and the mean values of WC (P/Pc=0.005/0.040) and BMI (P/Pc=0.002/0.016) among G (protection) allele carriers of rs1981529 gradually declined. Haplotype 1 (rs8122 G- rs1981529 A- rs34741656 G) was significantly associated with a higher prevalence of IR (Permutation P=0.021). Conclusion STEAP4 genetic variations are likely to be associated with obesity-related insulin resistance in Uygur Chinese general population.
参考文献
[1] |
- 下载量()
- 访问量()
- 您的评分:
-
10%
-
20%
-
30%
-
40%
-
50%