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セプティックショックにおける酸化窒素合成の阻害:どのくらい有益ですか?
E Nava1, R M Palmer, S Moncada
1Wellcome Research Laboratories, Beckenham, Kent, UK.
Lancet (London, England)
|December 21, 1991
まとめ
NG-モノメチル-L-アルギニン (L-NMMA),酸化窒素 (NO) 合成阻害剤は,ラットにおけるエンドトキシン誘発性低血圧を逆転させた. しかし,L-NMMAの高用量は低血圧を悪化させ,セプティックショックの治療に注意深く投与することが不可欠であることを示唆しています.
科学分野:
- 薬理学 薬理学とは
- 生理学 生理学とは
- 免疫学 免疫学とは
背景:
- セプティックショックはしばしば静脈圧縮剤に耐性のある低血圧を引き起こす.
- 酸化窒素 (NO) の生成は,この低血圧を媒介することに関与しています.
研究 の 目的:
- ネズミのエンドトキシン誘発性低血圧に対する窒素酸化物合成酵素阻害剤であるNG-モノメチル-L-アルギニン (L-NMMA) の効果を調査する.
- セプティックショック時の血圧に対するL-NMMAの用量依存的効果を決定する.
主な方法:
- エンドトキシン誘発性低血圧のラットに,L-NMMAを様々な用量 (3 mg/kg,30 mg/kg,300 mg/kg) で静脈内投与した.
- L-NMMA治療に対する血圧変化のモニタリング.
主要な成果:
- 30 mg/kgのL-NMMAの投与量は,低血圧を効果的に逆転させました.
- 低用量 (3 mg/kg) は効果がなかった.
- より高い用量 (300 mg/kg) は,血圧の低下を悪化させた.
結論:
- L-NMMAのような酸化窒素合成酵素の阻害剤は,セプシスの低血圧の治療の可能性を示しています.
- L-NMMAの有効性は用量に依存しており,NO合成の完全な阻害は有害である可能性があります.
- NO合成酵素阻害剤の慎重な定位は,セプティックショックとサイトカイン誘発性低血圧の管理に必要である.
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