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  • Title: Long-term amelioration of telmisartan on metabolic syndrome-related molecules in stroke-resistant spontaneously hypertensive rat after transient middle cerebral artery occlusion.
    Author: Deguchi K, Kurata T, Fukui Y, Liu W, Yun Z, Omote Y, Sato K, Kono S, Hishikawa N, Yamashita T, Abe K.
    Journal: J Stroke Cerebrovasc Dis; 2014; 23(10):2646-2653. PubMed ID: 25307428.
    Abstract:
    Telmisartan is expected to ameliorate not only hypertension, but also metabolic syndrome as a metabosartan. We examined the effects of telmisartan on metabolic syndrome-related molecules such as insulin receptor (IR), peroxisome proliferator-activated receptor gamma (PPAR-γ), and angiotensin 2 type 1 receptor (AT1R) in stroke-resistant spontaneously hypertensive rat (SHR-SR) after transient middle cerebral artery occlusion (tMCAO), by administering telmisartan at either 0 (vehicle), .3 mg/kg/day (low dose), or 3 mg/kg/day (high dose), postoperatively, from 3 months of age and performed immunohistologic analysis at 6, 12, and 18 months of age. Compared with the vehicle group, the 2 telmisartan groups dose dependently decreased the number of IR- and AT1R-positive neurons in the cerebral cortex in the ipsilateral cerebral cortex from 6 to 18 months after tMCAO. On the other hand, the number of PPAR-γ-positive neurons increased in a dose-dependent manner in the 2 telmisartan groups from 6 to 18 months. The present study suggests that telmisartan dose-dependently ameliorated metabolic syndrome-related changes in the poststroke brain of SHR-SR with a direct protective effect (low dose) and an additive benefit, an antihypertensive effect at a high dose, for long-term protection after tMCAO.
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