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VII.2. ACE gene polymorphism

A-I is converted to A-II by the ACE. A-II increases the BP and enhances aldosterone synthesis. It leads to a higher level of oxidative stress and the development of arteriosclerosis, and it facilitates the inflammatory pathways, coagulation (fibrosis) and apoptosis. It increases the myocardial contractility (positive inotropic effect) and heart frequency (positive chronotropic effect).

In ACE gene polymorphism, a 286 bp fragment can be found (variant I) or not (variant D) in individuals. Variant D results in an increased ACE and hence A-II level. ACE gene polymorphism may play a role in high BP, an endothelial dysfunction, heart failure and atherosclerosis too.