alexa Aliskiren enhances the protective effects of valsartan against cardiovascular and renal injury in endothelial nitric oxide synthase-deficient mice.
Materials Science

Materials Science

Journal of Nanomedicine & Nanotechnology

Author(s): Yamamoto E, Kataoka K, Dong YF, Nakamura T, Fukuda M,

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Abstract The protective effect of aliskiren, a direct renin inhibitor, against hypertensive cardiovascular and renal injury remains to be defined. This study was undertaken to examine the protective effects of the combination of aliskiren and valsartan, an angiotensin receptor blocker, against cardiovascular and renal injury. Endothelial NO synthase-deficient mice, subjected to cuff injury of femoral artery, were divided into 5 groups and were treated with the following: (1) vehicle; (2) aliskiren (25 mg/kg per day); (3) valsartan (8 mg/kg per day); (4) combined aliskiren (12.5 mg/kg per day) and valsartan (4 mg/kg per day); and (5) hydralazine (10 mg/kg per day) for 4 weeks. Aliskiren and valsartan alone markedly and similarly suppressed cardiac hypertrophy, inflammation and fibrosis, and coronary remodeling; prevented cuff injury-induced arterial intimal thickening; and reduced urinary albumin excretion, glomerular inflammation, and glomerulosclerosis in endothelial NO synthase-deficient mice. These beneficial effects of aliskiren and valsartan were associated with the significant attenuation of oxidative stress in these tissues. Hence, aliskiren and valsartan markedly exert the protective effects against cardiovascular and renal injury through the reduction of oxidative stress. Furthermore, compared with monotherapy with aliskiren or valsartan, the combination of a half dose of these drugs more greatly improved the above-mentioned cardiovascular and renal injuries of endothelial NO synthase-deficient mice, which were associated with greater attenuation of tissue oxidative stress by the combination therapy. Thus, the combination of aliskiren and valsartan exerts the synergistic organ-protective effects through synergistic attenuation of oxidative stress. The combination of aliskiren and valsartan seems to be a promising therapeutic strategy for hypertensive organ injury caused by endothelial NO synthase dysfunction. This article was published in Hypertension and referenced in Journal of Nanomedicine & Nanotechnology

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