血管内皮生长因子及对氧磷酶1基因多态性与糖尿病视网膜病变的相关性

目的 探讨血管内皮生长因子(VEGF)、对氧磷酶1(PON1)基因多态性与糖尿病视网膜病变(DR)的相关性.方法 选取2013年1月至2015年12月西宁市第二人民医院收治的糖尿病(DM)患者168例,将其分为DM组(48例)、增殖性DR(PDR)组(66例)和非增殖性DR(NPDR)组(54例);另选取同期体检健康者104例作为对照组(NC组).通过聚合酶链反应-限制性片段长度多态性(PCR-RFLP)测定血管内皮生长因子(VEGF)和对氧磷酶1(PON1)基因多态性,采用紫外分光光度计检测所有受试者超氧化歧化酶(SOD)和丙二醛(MDA)水平.结果 与NC组比较,DM组、NPDR组及PDR组收缩压、糖化血红蛋白水平明显升高,差异均有统计学意义(P<0.05);而舒张压、胆固醇、三酰甘油、高密度脂蛋白水平比较,差异均无统计学意义(P>0.05).PDR组和NPDR组收缩压比较,差异有统计学意义(P<0.05),而舒张压、胆固醇、三酰甘油、高密度脂蛋白、糖化血红蛋白水平比较,差异均无统计学意义(P>0.05).CC、CT、TT基因型患者DR发生率分别为71.05%、56.27%、38.64%,CC基因型患者DR发生率明显高于CT和TT基因型患者,差异有统诗学意义(P<0.05).PON1192位点不同基因型健康体检者SOD、MDA水平比较,差异均无统计学意义(P>0.05),QQ基因型DR患者体内SOD水平低于QR、RR基因型患者,MDA水平高于QR、RR基因型患者,差异均有统计学意义(P<0.05).结论 VEGF、PON1基因的表达影响DR的发生和进展,PON1基因可能通过影响DR患者体内氧化应激酶的表达控制疾病的发展.

Correlation between vascular endothelial growth factor and paraoxonase 1 gene polymorphism with diabetic retinopathy

Objective To explore the correlations of vascular endothelial growth factor (VEGF) and paraoxonase 1 (PON1) gene polymorphism with diabetic retinopathy. Methods A total of 168 patients with diabetes mellitus(DM) in the Second People's Hospital of Xining City were selected from January 2013 to December 2015, and were divided into the DM group (48 cases), proliferative diabetic retinopathy (PDR) group (66 cases) and non-proliferative diabetic retinopathy (NPDR) group (54 cases). A total of 104 healthy subjects were selected as the control group (NC group). The VEGF and PON1 gene polymorphisms were detected by using polymerase chain reaction-restriction fragment length polymorphism (PCR-RFLP), and levels of superoxide dismutase (SOD) and malondialdehyde (MDA) of all subjects were detected by using UV spectrophotometer. Results Compared with the NC group, the systolic blood pressures and glycated hemoglobin levels in the DM group, NPDR group and PDR group were significantly increased,there were statistically significant differences (P<0.05). No statistically significant difference was found in diastolic blood pressure and levels of cholesterol,triglyceride, high density lipoprotein among these groups (P>0.05). There was statistically significant difference in systolic blood pressure between PDR group and NPDR group (P< 0. 05), while no statistically significant difference was found in diastolic blood pressure and levels of cholesterol, triglyceride,high density lipoprotein and glycated hemoglobin between the two groups (P>0.05). The incidence rate of DR in the patients with CC,CT and TT genotype was 71.05%, 56.27 % and 38.64 %, respectively. The incidence rate of DR in the patients with CCgenotype was significantly higher than that in the patients with CT or TT genotype (P< 0.05). No statistically significant difference was found in SOD and MDA levels of healthy subjects with different PON1 192 genotypes (P>0.05). The SOD level of DR patients with QQ genotype was lower than that of patients with QR or RR genotype,and the MDA level of DR patients with QQ genotype was higher than that of patients with QR or RR genotype,the difference was statistically significant (P<0.05). Conclusion The expression of VEGF and PON1 genes could affect the development and progression of DR. PON1 gene might control the progression of DR by affecting the expression of oxidative kinase in DR patients.