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心臓におけるミトコンドリアアデニン核酸の病後回復
G K Asimakis1, J B Zwischenberger, K Inners-McBride
1Department of Surgery, University of Texas Medical Branch, Galveston 77550.
Circulation
|June 1, 1992
まとめ
ミトコンドリアアデニンヌクレオチド (AdN) は,心不全中に枯渇した 1-7 日以内に回復します. この回復は,呼吸器およびトランスロカゼ機能の改善に先立ち,ADN補充が心臓の回復の鍵であることを示唆しています.
科学分野:
- 心臓病学 心臓病学
- ミトコンドリア生物学
- バイオケミストリー バイオケミストリー
背景:
- ミトコンドリアのアデニン核酸 (AdN) は,心臓のエネルギー代謝に不可欠です.
- 発血不全は心臓ミトコンドリアからのADN喪失につながるが,再注射後の回復はよくわかっていない.
研究 の 目的:
- 犬の心臓におけるミトコンドリアのADNプールの回復を,イシュケミアと再注射の期間を経て調査する.
主な方法:
- 犬の心臓は30分間のLAD閉塞を経て,その後に異なる再注射時間 (0,30分,1日,7日) が続いた.
- ミトコンドリアと組織のADNレベル (ATP,ADP,AMP) を定量化しました.
- ミトコンドリア機能 (呼吸,アデニンヌクレオチドトランスロカゼ活性) を評価した.
主要な成果:
- ミトコンドリアのADNレベルは,再注射後1日から7日間で有意に回復した.
- 組織のADNレベルも回復を示し,ミトコンドリアのADN含有量と良好な相関関係を示した.
- ミトコンドリアの呼吸機能は,リフローなしのグループにおいてのみ低下したが,トランスロカゼの活性には影響はなかった.
結論:
- ミトコンドリアのADNの発血後の回復は,再注入後1日から7日間で起こります.
- ミトコンドリアの呼吸器およびアデニンヌクレオチドトランスロカゼ機能の回復は,完全なAdNプール回復に先行する.
- 早期再注射中の低ミトコンドリアのADNレベルは,発血後の収縮機能不全を完全に説明することはできません.
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