人間の肺循環は,エンドセリン-1のクリアランスと生産の両方にとって重要な場所です
J Dupuis1, D J Stewart, P Cernacek
1Department of Medicine, Montreal Heart Institute, St. Michael's Hospital, Toronto, Canada.
Circulation
|October 1, 1996
まとめ
人間の肺は,エンドセリン-1 (ET-1) を積極的に浄化し,生産し,重要な肺抽出にもかかわらずプラズマ濃度の一貫性を説明するバランスを維持します. この発見は,ET-1を明確にします.
科学分野:
- 心血管生理学 心血管の生理学
- 肺循環 肺循環について
- エンドクリノロジー エンドクリノロジー
背景:
- 動物の研究は,肺循環がエンドセリン-1 (ET-1) をクリアする上で重要な役割を果たしていることを示しています.
- 血ET-1クリアランスに対するヒト肺循環の貢献は,定量化されていないままである.
- 以前の研究では,血ET-1における動脈静脈 (AV) グラデントの欠如を,循環中のET-1の肺調節に対する証拠として解釈した.
研究 の 目的:
- ヒトにおける肺ET-1クリアランスを定量化するために.
- 肺ET-1クリアランスと生産を区別する.
- 循環中のET-1レベルを調節する人間の肺の役割を調査する.
主な方法:
- マルチプル・インジケーター・デリュケーション・テクニックを使用した.
- 測定された免疫反応性ET-1 (irET-1) レベル.
- 正常な左心室射出分数とベースラインの血液動力学を持つ13人の被験者を研究した.
主要な成果:
- 肺内ET-1抽出の平均値は47 +/- 7%でした.
- 抽出したET-1は速度定数Kseq = 0.048 +/- 0.019 s-1.で隔離された.
- 肺動脈と大動脈 (P = .22) の間でのIRET-1濃度の有意な違いは観察されなかった.
結論:
- 人間の肺は,ET-1のクリアランスと生産の両方の重要な場所として機能します.
- ET-1のクリアランスと生産の間の生理学的バランスは,肺循環に存在する.
- このバランスは,実質的な肺クリアランスにもかかわらず,心血管疾患への影響のあるAV ET-1差の欠如を説明します.
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