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Angiotensin Converting Enzyme Gene Polymorphism in Coronary Artery Disease: The Indian Scenario
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Ansamma Joseph
Published/Copyright:
June 1, 2005
Abstract
Angiotensin converting enzyme is a key component of the renin angiotensin system that plays an important role in cardiovascular regulation. It seems to modulate cardiovascular growth by virtue of its role in the conversion of angiotensin I to angiotensin II and degradation of kinins. A deletion polymorphism localized in intron 16 of the human angiotensin converting enzyme gene, corresponding to a 287 bp long Alu repetitive sequence, was found to be associated with increased risk of myocardial infarction in various subgroups, including European, French and Japanese coronary patients. This angiotensin converting enzyme gene I/D polymorphism was examined by the polymerase chain reaction in a cross-sectional study of 201 healthy Indian subjects and 150 patients (angiographically proven cases of coronary artery disease) whose serum angiotensin converting enzyme levels were concomitantly measured. The D/D, I/D and I/I genotypes were found in 20.66 %, 46.66 % and 32.66 % of the Indian coronary heart disease patients and in 23.38 %, 49.75% and 26.86 % of controls respectively. One of the reasons for not finding an association between the D allele and coronary artery disease in this study could be the ethnic heterogeneity and disease status heterogeneity among the patients and controls. However the phenotypic variance of serum angiotensin converting enzyme levels is strongly influenced by this polymorphism. In the Indian population, the angiotensin converting enzyme gene I/D polymorphism is not associated with risk for coronary artery disease although it is associated with plasma angiotensin converting enzyme activity. Hence the angiotensin converting enzyme gene I/D polymorphism does not seem to be a useful marker for coronary artery disease in the Indian population.
:
Published Online: 2005-06-01
Published in Print: 1998-08-01
Copyright © 1999 by Walter de Gruyter GmbH & Co. KG
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