Background This study was designed to investigate the relationships between changes in the structure and function of carotid arteries and angiotensin converting enzyme (ACE) gene polymorphism in Chinese hypertensive...Background This study was designed to investigate the relationships between changes in the structure and function of carotid arteries and angiotensin converting enzyme (ACE) gene polymorphism in Chinese hypertensive subjects. Methods Multiplex polymerase chain reaction amplification was used to evaluate the ACE gene insertion/deletion (I/D) polymorphism. High-resolution B-mode ultrasound examinations were performed to detect parameters of carotid artery remodeling. Results Intima-media thickness (IMT) was significantly different among the DD, ID and II genotypes of ACE (DD>ID>II, P <0.05). Carotid internal diameter,distensibility and stiffness were similar among the DD,ID and II genotypes of ACE ( P >0.05) in hypertensive subjects. The frequency of the DD gene and D allele of ACE were higher in patients with thickening carotid than in patients with normal carotid (70.4% vs 24.1%,and 79.5% vs 40.5%,respectively, P <0.001). In multiple stepwise regression analysis,independent risk factors for increased carotid IMT in hypertensive subjects were ACE genotypes ( P <0.001),age ( P <0.001) and carotid internal diameter ( P =0.032). Moreover,triglycerides and total cholesterol were higher in patients with the DD genotype than in those with the II genotype ( P <0.05). Conclusions The I/D polymorphism of the ACE gene was related to IMT,but not to internal diameter,distensibility and stiffness of the carotid in Chinese hypertensive subjects. ACE gene polymorphism was a main risk factor for increased carotid IMT. These results may imply that there is a link between lipid metabolism and ACE genotype polymorphism in Chinese hypertensive subjects.展开更多
【目的】探讨中国南方部分汉族人群的冠心病患者中,肾素-血管紧张素系统中的关键成分即血管紧张素转换酶(ACE)及血管紧张素原(AGT)双基因多态性与冠心病合并慢性心力衰竭(CHF)发病的关系。【方法】应用聚合酶链反应及限制性片段长度多...【目的】探讨中国南方部分汉族人群的冠心病患者中,肾素-血管紧张素系统中的关键成分即血管紧张素转换酶(ACE)及血管紧张素原(AGT)双基因多态性与冠心病合并慢性心力衰竭(CHF)发病的关系。【方法】应用聚合酶链反应及限制性片段长度多态性技术,对215例冠心病患者的ACE基因插入/缺失(I/D)及AGTM235T多态性进行检测。将其中105例合并CHF者作为病例组,其余110例心功能正常者作为对照组。【结果】冠心病合并CHF组DD基因型及D等位基因的频率均高于对照组(前者为45.7%vs23.6%,后者为64.8% vs 43.6%,P<0.01);AGT基因M235T多态性在两组中的分布无统计学差异;联合分析ACE与AGT基因多态性显示,两组中同时具有DD型ACE基因及TT型AGT基因的频率分别为27.6%及14.5%,前者明显高于后者。与Ⅱ+MM组合相比,具有该联合基因型的冠心病患者发生CHF的OR为5.039,较单基因ACEDD型发生CHF的OR增高。【结论】ACE基因I/D多态性与中国南方部分汉族人群冠心病患者发生CHF有关,DD型ACE基因可能是该地区CHF发病的遗传危险因素。单独的AGT基因M235T多态性似与该地区冠心病患者发生CHF无关,但联合ACE基因分析则发现,ACE和AGT基因在CHF的发生中具有协同作用,DD型基因的冠心病患者若同时携带有TT基因,发生CHF的机率增高。展开更多
文摘Background This study was designed to investigate the relationships between changes in the structure and function of carotid arteries and angiotensin converting enzyme (ACE) gene polymorphism in Chinese hypertensive subjects. Methods Multiplex polymerase chain reaction amplification was used to evaluate the ACE gene insertion/deletion (I/D) polymorphism. High-resolution B-mode ultrasound examinations were performed to detect parameters of carotid artery remodeling. Results Intima-media thickness (IMT) was significantly different among the DD, ID and II genotypes of ACE (DD>ID>II, P <0.05). Carotid internal diameter,distensibility and stiffness were similar among the DD,ID and II genotypes of ACE ( P >0.05) in hypertensive subjects. The frequency of the DD gene and D allele of ACE were higher in patients with thickening carotid than in patients with normal carotid (70.4% vs 24.1%,and 79.5% vs 40.5%,respectively, P <0.001). In multiple stepwise regression analysis,independent risk factors for increased carotid IMT in hypertensive subjects were ACE genotypes ( P <0.001),age ( P <0.001) and carotid internal diameter ( P =0.032). Moreover,triglycerides and total cholesterol were higher in patients with the DD genotype than in those with the II genotype ( P <0.05). Conclusions The I/D polymorphism of the ACE gene was related to IMT,but not to internal diameter,distensibility and stiffness of the carotid in Chinese hypertensive subjects. ACE gene polymorphism was a main risk factor for increased carotid IMT. These results may imply that there is a link between lipid metabolism and ACE genotype polymorphism in Chinese hypertensive subjects.
文摘【目的】探讨中国南方部分汉族人群的冠心病患者中,肾素-血管紧张素系统中的关键成分即血管紧张素转换酶(ACE)及血管紧张素原(AGT)双基因多态性与冠心病合并慢性心力衰竭(CHF)发病的关系。【方法】应用聚合酶链反应及限制性片段长度多态性技术,对215例冠心病患者的ACE基因插入/缺失(I/D)及AGTM235T多态性进行检测。将其中105例合并CHF者作为病例组,其余110例心功能正常者作为对照组。【结果】冠心病合并CHF组DD基因型及D等位基因的频率均高于对照组(前者为45.7%vs23.6%,后者为64.8% vs 43.6%,P<0.01);AGT基因M235T多态性在两组中的分布无统计学差异;联合分析ACE与AGT基因多态性显示,两组中同时具有DD型ACE基因及TT型AGT基因的频率分别为27.6%及14.5%,前者明显高于后者。与Ⅱ+MM组合相比,具有该联合基因型的冠心病患者发生CHF的OR为5.039,较单基因ACEDD型发生CHF的OR增高。【结论】ACE基因I/D多态性与中国南方部分汉族人群冠心病患者发生CHF有关,DD型ACE基因可能是该地区CHF发病的遗传危险因素。单独的AGT基因M235T多态性似与该地区冠心病患者发生CHF无关,但联合ACE基因分析则发现,ACE和AGT基因在CHF的发生中具有协同作用,DD型基因的冠心病患者若同时携带有TT基因,发生CHF的机率增高。
