An angiotensin II type-I receptor blocker, olmesartan medoxomil, attenuates lipid peroxidation in renal injury induced by subtotal nephrectomy.

An angiotensin II type-I receptor blocker, olmesartan medoxomil, attenuates lipid peroxidation in renal injury induced by subtotal nephrectomy. Research Abstract Details 

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An angiotensin II type-I receptor blocker, olmesartan medoxomil, attenuates lipid peroxidation in renal injury induced by subtotal nephrectomy. Abstract Text:

Toshiyuki Takahashi,Tsuneo Konta,Satoshi Takasaki,Kazunobu Ichikawa,Yasuchika Takeishi,Isao Kubota,Toshiyuki Takahashi,Tsuneo Konta,Satoshi Takasaki,Kazunobu Ichikawa,Yasuchika Takeishi,Isao Kubota,

BACKGROUND: Lipid-related oxidative stress, such as that caused by malondialdehyde (MDA), acrolein, and 4-hydroxynonenal (4-HNE), is involved in vascular injury in diabetes and hypertension. Olmesartan medoxomil, a blocker of angiotensin II type-I receptor, is an antihypertensive drug with antioxidant properties. In this study, we examined the involvement of oxidative lipids and the effect of olmesartan on lipid peroxidation in the progressive renal injury induced by renal mass reduction in rats. METHODS: Rats were treated with vehicle or olmesartan (0.5 mg/kg or 10 mg/kg) for up to 8 weeks after subtotal nephrectomy. The expression of oxidative lipids and the effect of olmesartan on lipid peroxidation were evaluated by Western blotting and immunostaining of renal tissue. RESULTS: Immunohistochemical examination revealed that MDA, acrolein, and 4-HNE were scarcely detected in renal cortex in sham-operated rats. On the contrary, these oxidative lipids were observed in injured glomeruli and dilated renal tubules in the ablated kidneys. Western blotting of renal cortical tissue revealed that MDA- or acrolein-bound proteins were mainly detected in the range of 30-90 kDa. Treatment with olmesartan attenuated lipid peroxidation and glomerulosclerosis. The renoprotective and antioxidative effect was higher in rats that received a high dose of olmesartan than in rats in the low-dose group. CONCLUSIONS: These results indicate that oxidative lipids reflect the progression of renal injury induced by subtotal nephrectomy in rats. Olmesartan may have a renoprotective effect, with attenuation of lipid peroxidation.

An angiotensin II type-I receptor blocker, olmesartan medoxomil, attenuates lipid peroxidation in renal injury induced by subtotal nephrectomy. Publishing Authors By Initials

T Takahashi,T Konta,S Takasaki,K Ichikawa,Y Takeishi,I Kubota,T Takahashi,T Konta,S Takasaki,K Ichikawa,Y Takeishi,I Kubota,

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An angiotensin II type-I receptor blocker, olmesartan medoxomil, attenuates lipid peroxidation in renal injury induced by subtotal nephrectomy. Journal Published:

PUBLICATION TYPE: Research Support, Non-U.S. Gov

Journal: Clinical and experimental nephrology

VOLUME: 11

Page Numbers: 202-8

Journal Abbreviation: Clin. Exp. Nephrol.

ISSN: 1342-1751

DAY: 28

MONTH: 09

YEAR: 2007

An angiotensin II type-I receptor blocker, olmesartan medoxomil, attenuates lipid peroxidation in renal injury induced by subtotal nephrectomy. Information

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LANGUAGE: eng

NlmUniqueID: 9709923

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AFFILIATION: Department of Cardiology, Pulmonology, and Nephrology, Yamagata University School of Medicine, 2-2-2 Iida-Nishi, Yamagata, 990-9585, Japan.

Country: Japan

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MEDLINETA: Clin Exp Nephrol

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