Benidipine, a dihydropyridine L-type/T-type calcium channel blocker, affords additive benefits for prevention of cardiorenal injury in hypertensive rats

被引:37
作者
Yamamoto, Eiichiro [1 ]
Kataoka, Keiichiro [1 ]
Dong, Yi-Fei [1 ]
Nakamura, Taishi [1 ]
Fukuda, Masaya [1 ]
Nako, Hisato [1 ]
Ogawa, Hisao [2 ]
Kim-Mitsuyama, Shokei [1 ]
机构
[1] Kumamoto Univ, Grad Sch Med Sci, Dept Pharmacol & Mol Therapeut, Kumamoto 8608556, Japan
[2] Kumamoto Univ, Grad Sch Med Sci, Dept Cardiovasc Med, Kumamoto 8608556, Japan
关键词
aldosterone; cardiac remodeling; L-type calcium channel; oxidative stress; renal injury; T-type calcium channel; T-TYPE; OXIDATIVE STRESS; CA2+ CHANNELS; CARDIAC-HYPERTROPHY; VASOSPASTIC ANGINA; HEART-FAILURE; NITRIC-OXIDE; ALDOSTERONE; EXPRESSION; SALT;
D O I
10.1097/HJH.0b013e3283388045
中图分类号
R6 [外科学];
学科分类号
1002 ; 100210 ;
摘要
Objectives Benidipine is a dihydropyridine calcium channel blocker inhibiting not only L-type but also T-type calcium channels. To elucidate potential additive benefit of benidipine for prevention of cardiorenal injury, we compared the cardiac and renal protective effects of equihypotensive doses of benidipine and cilnidipine in stroke-prone spontaneously hypertensive rats (SHRSP). Methods SHRSP were divided into five groups, and were given vehicle, benidipine at 1 or 3 mg/kg per day, or cilnidipine at 1 or 3 mg/kg per day for 7 weeks, and the protective effects against cardiorenal injury were compared among each group. Results Benidipine and cilnidipine at the same doses exerted comparable hypotensive effects on SHRSP throughout the treatment. Despite equihypotensive effects between both drugs, benidipine prevented cardiac hypertrophy, fibrosis, and inflammation to a greater extent than cilnidipine. Moreover, benidipine prevented glomerulosclerosis, tubulointerstitial injury, and renal inflammation more than cilnidipine. To elucidate the underlying mechanism of more beneficial effects of benidipine than cilnidipine, we compared the effects of these drugs on cardiac and renal oxidative stress, and aldosterone in SHRSP. Benidipine reduced both cardiac and renal NADPH oxidase activities in SHRSP more than cilnidipine, being associated with more attenuation of cardiac and renal superoxide by benidipine. Furthermore, serum aldosterone was significantly reduced by benidipine but not by cilnidipine. Conclusion Benidipine exerted more protective effects against cardiorenal injury of hypertensive rats than cilnidipine, through more attenuation of oxidative stress than cilnidipine, and the reduction of aldosterone. Benidipine, via blockade of T-type calcium channels, seems to elicit additive benefits for prevention of hypertensive cardiorenal injury. J Hypertens 28: 1321-1329 (C) 2010 Wolters Kluwer Health | Lippincott Williams & Wilkins.
引用
收藏
页码:1321 / 1329
页数:9
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