Mibefradil prevents L‐NAME‐exacerbated nephrosclerosis in spontaneously hypertensive rats
作者:
Changbin Qiu,
Patrick Bruneval,
Andree Roeckel,
Didier Heudes,
Jean-Paul Van Huyen,
Sebastien Roux,
期刊:
Journal of Hypertension
(OVID Available online 1999)
卷期:
Volume 17,
issue 10
页码: 1489-1495
ISSN:0263-6352
年代: 1999
出版商: OVID
关键词: angiotensin-converting enzyme inhibition;calcium channel blocker;cilazapril;inbred rats;mibefradil;nephrosclerosis;N-nitro-L-arginine methylester;SHR
数据来源: OVID
摘要:
ObjectiveTo determine the potential renal protective effects of a novel calcium channel blocker mibefradil in chronic renal failure.MethodWe compared the long-term effects of mibefradil with an angiotensin-converting enzyme inhibitor cilazapril on blood pressure, proteinuria, renal function and histological alterations inN-nitro-L-arginine methylester (L-NAME)-treated spontaneously hypertensive rats (SHR). Three groups of SHR were studied for 45 days: group 1 (n= 14), treated with L-NAME only (50 mg/l in the drinking water); group 2 (n= 15) L-NAME plus co-treatment with mibefradil (30 mg/kg per day); group 3 (n= 15), L-NAME plus co-treatment with cilazapril (10 mg/kg per day).ResultsBoth mibefradil and cilazapril attenuated the increased systolic blood pressure, and prevented the development of proteinuria and the decreased creatinine clearance (Ccr) seen at day 42 in the group treated with L-NAME alone. Notably, mibefradil had similar effects to cilazapril on proteinuria and Ccr, despite a reduced anti-hypertensive effect. All animals receiving mibefradil cotreatment remained alive throughout the experiment, whereas the mortality rate was 43% in SHR treated with L-NAME alone. Both mibefradil and cilazapril completely prevented renal structural damage as assessed by scoring glomerular, tubulo-interstitial and vascular lesions.ConclusionsOur data show that mibefradil prevented the development of hypertension and proteinuria, renal functional impairment and nephrosclerosis, and also improved animal survival. The renal protective effects of mibefradil were at least equivalent to those of an ACE inhibitor in this animal model of chronic renal failure.
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