心臓のS100A1タンパク質濃度は,心筋梗塞後の収縮性能と心不全への傾向を決定する
Patrick Most1, Hanna Seifert, Erhe Gao
1Center for Translational Medicine, Department of Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA. patrick.most@jefferson.edu
Circulation
|September 6, 2006
まとめ
心臓内のS100A1タンパク質の減少は,心筋梗塞後の心不全を悪化させる. S100A1濃度の上昇は,心臓機能を保護し,心不全モデルでの生存率を改善します.
科学分野:
- 心臓病学 心臓病学
- 分子生物学は分子生物学である.
- バイオケミストリー バイオケミストリー
背景:
- S100A1タンパク質の減少は,ヒトの心筋疾患において観察される.
- S100A1は,心臓におけるカルシウム依存性イノトロピック因子である.
研究 の 目的:
- 発血後心不全 (HF) の発症および進行におけるS100A1タンパク質濃度の役割を調査する.
主な方法:
- S100A1-トランスジェニック (STG) とS100A1-ノックアウト (SKO) のマウスは心筋梗塞 (MI) を受けました.
- 心臓の機能,再構成,アポトーシス,生存率は,MI後の4週間までの間,STG,SKO,非変異性子宮内細菌対照群 (NLC),および野生型 (WT) のマウスを比較した.
主要な成果:
- S100A1欠乏症の心臓 (SKO-MI) は急性収縮性不補償,加速したHF進行,増加したアポトーシス,およびより高い死亡率を示しました.
- S100A1過剰発現する心臓 (STG-MI) は,心臓機能の保全,アポトーシスの減少,高縮とHFの予防,生存率が優れていることを実証しました.
- 信号伝達経路 (Gq,Gs,PKC) は,心臓のS100A1レベルに影響を与え,サルコプラズマ網膜のCa2+サイクルとβ-アドレナージ信号伝達に影響を与えました.
結論:
- S100A1タンパク質のダウンレギュレーションは,心不全における心収縮機能不全に重大な影響を及ぼします.
- S100A1レベルは,心不全の患者の臨床経過の重要な決定因子です.
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