RESUMO
<p><b>OBJECTIVE</b>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.</p><p><b>METHODS</b>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.</p><p><b>RESULTS</b>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.</p><p><b>CONCLUSION</b>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 A allele have a greater risk of developing hypertension.</p>