ブラジキニンの血管拡張効果は,心不全の犬において保存された
1Institut National de la Santé et de la Recherche Médicale (INSERM), Unité 400, Faculté de Médecine, Créteil, France. jbsu@im3.inserm.fr
Circulation
|December 22, 1998
まとめ
心不全では,ブラジキニンの血管拡張効果は,縮した内皮由来の血管拡張にもかかわらず保持されます. これは,ブラジキニンが心不全における血管収縮の管理に重要な役割を果たしていることを示唆しています.
科学分野:
- 心血管生理学 心血管の生理学
- 薬理学 薬理学とは
背景:
- 心不全 (HF) は,血管収縮器系が活性化され,内皮由来の血管拡張が鈍化することが特徴です.
- HFにおける強力な血管拡張剤であるブラジキニンの役割は十分に理解されていません.
研究 の 目的:
- ブラジキニンの血管拡張効果が心不全のモデルで変化しているかどうかを調査する.
主な方法:
- 慢性的に計測された犬をコントロール状態とペースで誘発されたHFで研究した.
- 血管拡張を評価するために,外因的なブラジキニンとアセチルコリンを投与.
- エナラプリラートとシプロキレンを使用して,Hoe 140 (ブラディキニンB2受容体対抗体) を含むまたは含まない,内生ブラディキニンの効果を評価した.
主要な成果:
- アセチルコリン誘発の血管拡張は,HFで鈍化した.
- 外因的なブラジキニンは,対照群と高周波群の両方で,平均大動脈圧 (MAP) と心電量 (CO) の増加に類似した用量依存的な低下を引き起こしました.
- エナラプリラットを用いて評価された内在的なブラジキニンの効果は,対照群と同様にHFで保存された.
結論:
- 外生性ブラジキニンと内生性ブラジキニンの血管拡張効果は,このHFモデルで保存されています.
- ブラディキニンはHFにおいて重要な補償的役割を果たし,静脈収縮と鈍化した内皮に依存する血管拡張を相殺する可能性があります.
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