alexa Effects of telmisartan and losartan on insulin resistance in hypertensive patients with metabolic syndrome.
Pharmaceutical Sciences

Pharmaceutical Sciences

Clinical Pharmacology & Biopharmaceutics

Author(s): Bahadir O, Uzunlulu M, Oguz A, Bahadir MA

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Abstract Partial peroxisome proliferator-activated receptor-gamma (PPAR-gamma) agonists are known to decrease insulin resistance. Experimental studies have shown that the angiotensin type 1 receptor blocker (ARB) telmisartan has a PPAR-gamma-activating property, but there does not appear to be a class effect. To test telmisartan's clinical importance, we here investigated its effect on insulin resistance in hypertensive patients with metabolic syndrome (MetS) in comparison with another ARB, losartan. A total of 42 hypertensive MetS patients (29 female, 13 male) were included (mean age: 50+/-9, range: 20-70 years). NCEP-ATP III criteria were used for the diagnosis of MetS. Patients were randomized to receive either telmisartan 80 mg/day (n=21) or losartan 50 mg/day (n=21) for 8 weeks. Biochemical assessments were made at baseline and at the end of the 8 weeks. Insulin resistance was evaluated by using homeostasis model assessment of insulin resistance (HOMA-IR). Both groups had similar reductions in systolic and diastolic pressures (p>0.05). HOMA-IR did not change significantly in either group throughout the study. In the telmisartan group, the mean HOMA-IR at baseline and at the end of the study were 1.9+/-07 and 1.9+/-0.5, respectively. The figures for the losartan group were 1.8+/-0.6 and 1.8+/-0.6, corresponding. In conclusion, in contrast with the reports that telmisartan may decrease insulin resistance by an effect associated with its molecular structure, 8 weeks of telmisartan treatment in the present study had a neutral effect on insulin resistance in hypertensive MetS patients, and similar results were obtained for losartan. This article was published in Hypertens Res and referenced in Clinical Pharmacology & Biopharmaceutics

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