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The metabolic syndrome (MS) is a common risk factor for cardiovascular disease and type-2 diabetes. Recently, telmisartan, an angiotensin II receptor antagonist that has an antihypertensive effect, has been reported to be a partial peroxisome proliferator-activated receptor gamma (PPARgamma) agonist. The anti-diabetic hormone adiponectin has been recognized as a marker of in vivo PPARgamma activation. Therefore, we studied telmisartan's effect on the metabolic profile and adiponectin levels in a fructose-induced hypertensive, hyperinsulinemic, hyperlipidemic rat model. Twenty-four male Sprague-Dawley rats were divided into three groups (eight in each). One group of control rats was fed standard chow for 5 weeks while a second was fed a fructose-enriched diet. A third group was fed a fructose-enriched diet for 5 weeks and treated with telmisartan 5 mg/kg/day during the last 2 weeks. Fructose feeding increased systolic blood pressure (mean+/-SEM), from 130+/-1 to 148+/-2 mmHg, insulin from 0.26+/-0.03 to 0.68+/-0.08 ng/mL, and triglycerides from 102+/-6 to 285+/-23 mg/dL (p&lt;0.05 for all variables). Telmisartan treatment reversed these effects and reduced blood pressure to 125+/-2 mmHg, insulin levels to 0.41+/-0.07 ng/mL, and triglycerides to 146+/-18 mg/dL (p&lt;0.05 for all variables), while attenuating the increase in body weight during weeks 3 to 5. In contrast, telmisartan did not affect plasma adiponectin levels. In conclusion, although telmisartan is considered a partial PPARgamma agonist, its beneficial effect in the fructose-induced hypertension, hypertriglyceridemia, and hyperinsulinemia rat model is apparently not mediated by adiponectin elevation but rather by direct inhibition of AT1 receptor.

hypertension research

Effect of Telmisartan, Angiotensin II Receptor Antagonist, on Metabolic Profile in Fructose-Induced Hypertensive, Hyperinsulinemic, Hyperlipidemic Rats