Effects of a Pure .ALPHA./.BETA.-Adrenergic Receptor Blocker on Monocrotaline-Induced Pulmonary Arterial Hypertension With Right Ventricular Hypertrophy in Rats
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- Ishikawa Masaya
- Department of Internal Medicine, Nippon Medical School
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- Sato Naoki
- Intensive and Cardiac Care Unit, Nippon Medical School
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- Asai Kuniya
- Department of Internal Medicine, Nippon Medical School
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- Takano Teruo
- Department of Internal Medicine, Nippon Medical School
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- Mizuno Kyoichi
- Department of Internal Medicine, Nippon Medical School
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Abstract
Background: It is unclear how much the sympathetic nervous system is involved in the development of pulmonary arterial hypertension (PAH). The present study examined whether or not a pure α/β-adrenergic receptor blocker (arotinolol) could prevent the development of PAH and right ventricular hypertrophy (RVH) in a rat model of monocrotaline (MCT)-induced PAH. Methods and Results: The heart rate, arterial blood pressure (BP), left ventricular pressure, pulmonary artery pressure (PAP), and right ventricular pressure (RVP) were measured after administration of arotinolol or saline for 2 weeks. Ventricular weight and myocyte size were also measured. Mean PAP was increased less in the arotinolol group (n=6), (53 ±9 vs 21 ±2 mmHg in the control (n=6); P<0.01). Systolic RVP was also less in the arotinolol group (41 ±3 vs 91 ±14 mmHg in the control, P<0.05) without differences in BP. It also significantly reduced the RV/body weight ratio (0.58 ±0.01 vs 0.77 ±0.04 mg/g; P<0.01). Furthermore, the myocyte width was significantly decreased in the arotinolol group. Conclusions: The pure α/β-blocker arotinolol prevented the progression of MCT-induced PAH and RVH in rats, suggesting that sympathetic nervous activation might play a role in the development of PAH. (Circ J 2009; 73: 2337-2341)<br>
Journal
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- Circulation Journal
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Circulation Journal 73 (12), 2337-2341, 2009
The Japanese Circulation Society
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Details 詳細情報について
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- CRID
- 1390001205102562688
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- NII Article ID
- 10025938662
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- NII Book ID
- AA11591968
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- ISSN
- 13474820
- 13469843
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- Text Lang
- en
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- Data Source
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- JaLC
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed