Journal
CLINICAL AND EXPERIMENTAL HYPERTENSION
Volume 32, Issue 2, Pages 98-104Publisher
TAYLOR & FRANCIS INC
DOI: 10.3109/10641960902993129
Keywords
losartan; perivascular adipose tissue; vascular function; hypertension; fructose
Funding
- Hospital Infantil de Mexico Federico Gomez [HIM/2006/040]
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Recent studies have shown the effect of perivascular adipose tissue (PVAT) on the regulation of vascular function; however, its role in the model of metabolic syndrome remains unclear. The aim of this study was to examine the effect of losartan on PVAT-derived vascular dysfunction in fructose-induced hypertensive rats. Rats were fed with either water, 10% fructose, or 10% fructose with 10mg/kg losartan for 8 weeks. In the isolated aorta with PVAT and endothelium, contraction induced by norepinephrine (NE) was more potent in fructose-fed rats compared to control rats. Losartan normalized blood pressure, insulin resistance, and NE-induced vasoconstriction in fructose-fed rats. In the aortic rings with/without endothelium and with/without PVAT, losartan could not improve the acetylcholine-induced relaxation in fructose-fed rats. The observation suggested that losartan partly improved the PVAT-associated vascular regulation in fructose-induced hypertensive rats.
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