冠心病合并糖尿病患者乙醛脱氢酶2基因多态性与高血压的关系

目的探讨皖北地区冠心病合并糖尿病患者乙醛脱氢酶2（ALDH2）基因多态性与高血压的相关性。方法筛选出皖北地
区167例冠心病合并糖尿病患者为研究对象，应用聚合酶链式反应-限制性片段长度多态性方法（PCR-RFLP）分析ALDH2基因
G487A多态性。按照ALDH2基因型分为2组：野生型组（n=105）和突变型组（n=62），比较两组间高血压的患病率、高血压的危
险因素以及收缩压、舒张压、脉压等指标的差异。结果冠心病合并糖尿病患者ALDH2基因突变型组高血压发生率高于野生型
组（P<0.05）；两组之间收缩压、脉压差明显大于野生型组，舒张压无明显差异。Logistic回归分析显示，ALDH2基因突变型增加
了高血压的发生机率，与高胰岛素水平、胰岛素抵抗发挥协同作用。结论ALDH2基因的突变与高血压存在相关性；携带A等
位基因可能使冠心病合并糖尿病患者高血压发生的危险性增加。

Correlation of aldehyde dehydrogenase-2 gene polymorphism with hypertension in patients with coronary heart disease complicated by diabetes mellitus

Objective To investigate the correlation of G487A polymorphism of aldehyde dehydrogenase-2 (ALDH2) gene with
hypertension in patients with coronary heart disease complicated by type 2 diabetes. Methods This study was conducted
among 167 patients with coronary heart disease complicated by diabetes mellitus. The polymorphisms of gene G487A ALDH2
were determined using polymerase chain reaction-restricted fragments length polymorphism technique (PCR-RFLP).
According to the genotypes, the patients were divided into GG group (n=105) and GA/AA group (n=62), and the incidence of
hypertension, risk factors of hypertension, systolic and diastolic pressures, and pulse pressure indexes were compared
between the two groups. Multivariate logistic regression analysis was performed to adjust the effects of the confounding
factors. Results The incidence of hypertension in GA/AA group was significantly higher than that in GG group (P<0.05), and
the former group showed a significantly greater differences between systolic and pulse pressure; the diastolic pressure was
comparable between the two groups. Multivariate logistic regression analysis showed that GA/AA was associated with an
increased risk of hypertension in synergy with high insulin level and insulin resistance. Conclusion ALDH2 gene G487A
polymorphism may be associated with hypertension in patients with coronary heart disease complicated by type 2 diabetes,
and the patients with an Aallele have a greater risk of developing hypertension.