冠心病患者胰岛素受体底物-1基因多态性的研究

目的　探讨胰岛素受体底物 - 1基因多态性是否与冠心病有关联。方法　应用多聚酶链反应 ( PCR)对成都地区汉族 113例冠心病患者及 194例正常对照者胰岛素受体底物 - 1基因酶切位点的限制性片段长度多态性( RFL P)进行研究。血脂用酶法测定。结果　冠心病组和正常对照组胰岛素受体底物 - 1基因均以 GG基因型为主 ,其频率分别为 0 .960和 0 .985。正常对照组和冠心病组胰岛素受体底物 - 1基因 R等位基因频率分别为 0 .0 15和0 .0 40 ,具有统计学意义 ( P=0 .0 5 )。冠心病组中具有 G/R基因型者血清 TC水平较具有 G/G基因型者显著升高( P<0 .0 5 ) ,具有 G/G基因型者血糖水平较具有 G/R基因型者显著升高 ( P<0 .0 5 )。结论　胰岛素受体底物 - 1基因多态性与中国人冠心病有一定关联。冠心病患者胰岛素受体底物 - 1基因 G/R基因型对血清胆固醇的升高有一定影响 ,而 G/G基因型对血糖的升高有一定影响

Polymorphism of Insulin Receptor Substrate-1 Gene in Patients with Coronary Heart Diseases

Objective To explore the relationship between the polymorphism of insulin receptor substrate-1 (IRS-1) gene and coronary heart diseases in Chinese population. Methods A total of 113 patients with coronary heart diseases and 194 healthy Chengdu residents with less than 82 mmol/L of TG and 6.2 mmol/L of TC in fasting serum testing were selected and compared. The genotype and allele frequency of IRS-1 gene polymorphism was assayed by polymerase chain reaction (PCR)-restriction fragment length polymorphism (RFLP). The serum lipids were measured by enzymatic kits. Results The GG genotype dominated in the IRS-1 gene with frequency of 0.960 and 0.985 for patients and healthy controls respectively. Difference appeared in R allele frequency (0.015 for healthy controls and 0.040 for patients, P=0.05). Patients with genotype G/R had significantly higher level of serum TC and lower level of plasma glucose than patients with genotype G/G (P<0.05). Conclusion IRS-1 gene polymorphism is associated with coronary heart disease in Chinese population. The G/R and G/G genotype of IRS-1 gene contributes to the increasing of serum cholesterol and plasma glucose respectively.