WOS: 000254637500003Objective. The aims of this study were to compare the effect of telmisartan and valsartan on the blood and insulin sensitivity and adiponectin levels in hypertensive patients with metabolic syndrome. Patients and Methods. One hundred twenty male patients who met the criteria for metabolic syndrome defined as in ATP III enrolled in the sudy. All patients were randomized to receive treatment with telmisartan 80 mg (n=70) or valsartan 160 mg (n=50) once daily for 6 months. Serum insulin concentration was measured by chemiluminescence, plasma levels of adiponectin and visfatin by Enzyme linked immunosorbent assay kit (ELISA). Insulin resistance (IR) was estimated using the homeostasis model assessment (HOMA). Results: Mean HOMA-IR and adiponectin and visfatin levels were measured 3.00 +/- 0.9 and 5.93 +/- 0.3 mgr/ml and 23.45 +/- 6.1 mgr/ml in patients before starting treatment of telmisartan, respectively. They were changed to 2.4 +/- 0.5 and 6.71 +/- 0.5 mg/ml and 21.40 +/- 5.0 mg/ml at a 6 months period. In valsartan group, mean HOMA-IR and adiponectin and visfatin levels were measured 2.9 +/- 0.5 and 5.50 +/- 0.9 mg/ml 19.05 +/- 3.9 mg/ml before treatment, respectively. After a 6 months period, mean HOMA-IR and adiponectin and visfatin levels were found 3.00 +/- 0.9 and 6.24 +/- 0.7 mg/ml and 20.76 +/- 4.5 mg/ml, respectively. Conclusion: Telmisartan produced significant reductions from baseline in HOMA-IR and insulin levels, whereas valsartan did not. Both telmisartan and valsartan did no changed serum visfatin levels but they increased serum adiponectin concentrations by RAS blockade
