Abstract
Elevated plasma homocysteine has been implicated as a risk factor for hypertension. C677T polymorphism in methylenetetrahydrofolate reductase gene (MTHFR) is a major determinant of hyperhomocysteinemia, which results in endothelial dysfunction. Angiotensin-converting enzyme (ACE) inhibitors appear to remedy the endothelial dysfunction and restore endothelium-dependent vasodilatation. The co-existence of genetic polymorphisms in drug metabolizing enzymes, targets, receptors, and transporters may influence the drug efficacy. The purpose of this study was to investigate whether short-term blood pressure control by benazepril, an ACE inhibitor, was modulated by C677T MTHFR gene polymorphism. A total of 444 hypertensive patients, aged 27 to 65 years, without any anti hypertensive therapy within 2 weeks were included. All of them were treated orally with benazepril at a single daily fixed dosage of 10 mg for 15 consecutive days. Blood pressures were measured at baseline and on the 16th day of treatment. Among them, the frequency of MTHFR C677T genotype CC, CT and TT was 24.3%, 51.8%, and 23.9%, respectively. In a recessive model (CC+CT versus TT genotype), both baseline diastolic blood pressure (DBP) and diastolic blood pressure resp...Continue Reading
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