| Abstract |
Nω-Nitro-l-arginine methyl ester (l-NAME)-induced hypertension and cardiovascular remodeling are
associated with oxidative stress and inflammation. Garcinia mangostana Linn., has been reported to have antioxidant and anti-inflammatory properties. This study investigated whether G. mangostana pericarp extract (GME) could prevent l-NAME-induced hemodynamic alterations, cardiovascular remodeling, oxidative stress and inflammation in rats. Male Sprague-Dawley rats were given 40 mg/kg/day of L-NAME in drinking water to induce hypertension, and were simultaneously treated with GME at a dose of 200 mg/kg/day. Rats that received l-NAME for five weeks had high blood pressure, left ventricular hypertrophy and thickening of aortic wall. Vascular superoxide production, plasma malondialdehyde (MDA),
and plasma tumor necrosis factor alpha (TNF-) were significantly increased in l-NAME-hypertensive rats (p < 0.05). This was consistent with up-regulation of the p47phox NADPH oxidase subunit and iNOS protein expression in aortic tissues (p < 0.05). Low levels of plasma nitric oxide metabolites were observed in L-NAME hypertension. GME prevented the development of hypertension and cardiovascular remodeling
induced by L-NAME with reduced oxidative stress and inflammation. These data suggest that GME had a protective effect against L-NAME-induced hypertension and cardiovascular remodeling via suppressing p47phox NADPH oxidase subunit and iNOS protein expression resulting in enhancing NO bioavailability. |
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Journal Publication
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