アンジオテンシン変換酵素2は,重度の急性肺不全から保護します
Yumiko Imai1, Keiji Kuba, Shuan Rao
1IMBA, Institute of Molecular Biotechnology of the Austrian Academy of Sciences, Vienna A-1030, Austria.
Nature
|July 8, 2005
まとめ
アンジオテンシン変換酵素2 (ACE2) は,急性肺損傷 (ALI) と急性呼吸器障害症候群 (ARDS) に対して保護します. ACE2を標的にすることは,高い死亡率と限られた治療選択肢を持つ状態であるARDSのための新しい治療法を提供することができる.
科学分野:
- 肺内医学 肺内医学 肺内医学
- 分子生物学は分子生物学である.
- 病理生理学 病理生理学とは
背景:
- 急性呼吸器障害症候群 (ARDS) は,高い死亡率を有する重度の肺損傷です.
- 現在,ARDSの治療法は限られている.
- レニン-アニオテンシン系 (RAS) は肺損傷に作用し,主要な酵素ACEとACE2は対極的な機能を持つ.
研究 の 目的:
- 急性肺損傷 (ALI) におけるACE2およびその他のRAS成分の役割を調査する.
- ARDSに対するACE2を標的とした治療の可能性を調査する.
- 肺損傷モデルにおけるACE2の保護メカニズムを理解する.
主な方法:
- マウスモデルで,酸吸入による急性肺損傷とセプシスを用いた.
- アンジオテンシン変換酵素 (ACE) が不足しているマウスを生成した.
- 保護効果を評価するために,再結合ACE2を投与した.
主要な成果:
- ACE2とアンジオテンシンII型2受容体 (AT2) は,マウスにおけるALIに対する保護効果を示した.
- ACE,アンジオテンシンII,アンジオテンシンII型1a受容体 (AT1a) が肺損傷を促進することが判明しました.
- ACE欠乏したマウスは,ALIモデルで改善された結果を示した.
- 再結合ACE2投与は,マウスを重度のALIから保護しました.
結論:
- ACE2は,急性肺損傷を軽減する上で重要な保護的役割を果たします.
- ACE2をターゲットにすることは,ARDSの有望な治療戦略です.
- レニン-アニオテンシン系を調節し,特にACE2活性を増強することは,ARDS患者にとって有益である可能性があります.
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