Comparative Effects of Olmesartan and Azelnidipine on Atrial Structural Remodeling in Spontaneously Hypertensive Rats

被引：6
|
作者：
Okamura, Kazuki [1 ]
Ito, Masahiro [1 ]
Tanaka, Komei [1 ]
Chinushi, Masaomi [1 ]
Adachi, Takeshi [3 ]
Mitsuma, Wataru [1 ]
Hirono, Satoru [1 ]
Nakazawa, Mikio [2 ]
Kodama, Makoto [1 ]
Aizawa, Yoshifusa [1 ]
机构：
[1] Niigata Univ, Grad Sch Med & Dent Sci, Div Cardiol, Niigata 9518510, Japan
[2] Niigata Univ, Fac Med, Sch Hlth Sci, Dept Med Technol, Niigata 9518510, Japan
[3] Natl Def Med Coll, Dept Internal Med 1, Saitama, Japan
来源：
PHARMACOLOGY | 2009年 / 83卷 / 06期
关键词：
Atrial structural remodeling; Angiotensin 2 type 1 receptor blocker; Oxidative stress; CARDIAC MYOCYTE HYPERTROPHY; CONGESTIVE-HEART-FAILURE; OXIDATIVE STRESS; ANGIOTENSIN-II; FIBRILLATION SUBSTRATE; CARDIOVASCULAR INJURY; NITRIC-OXIDE; INHIBITION; NADPH; SUPEROXIDE;
D O I：
10.1159/000218103
中图分类号：
R9 [药学];
学科分类号：
1007 ;
摘要：
The differential effects between olmesartan (OM), an angiotensin 2 type 1 receptor blocker (ARB), and azelnidipine (AZ), a calcium channel blocker (CCB), on atrial structural remodeling were studied in spontaneously hypertensive rats (SHR). Eight weeks after treatment, both OM and AZ decreased systolic blood pressure to similar levels. Histological analysis revealed that both OM and AZ had decreased the size of the atrial myocytes and interstitial fibrosis in the atrium, and that the effects of OM were greater than those of AZ. These beneficial effects of OM were associated with less atrial oxidative stress, as assessed by 3-nitrotyrosine staining, and less activation of Rac1, a regulatory component in NADPH oxidase. These results suggest that the ARB was more effective than the CCB in ameliorating atrial structural remodeling due to the suppression of oxidative stress. Copyright (C) 2009 S. Karger AG, Basel
引用
收藏
页码：360 / 366
页数：7
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