運動によって引き起こされるグルコース代謝の変化は,生理学的心臓の成長を促進する
Andrew A Gibb1,2,3, Paul N Epstein4, Shizuka Uchida5
1Institute of Molecular Cardiology (A.A.G., Y.Z., L.A.M., K.K., P.T., D.J.C., K.R.B., S.P.J., A.B., B.G.H.).
Circulation
|September 2, 2017
まとめ
運動による心臓の糖分分解の低下は,生理学的心臓の成長を促します. 代謝の柔軟性は心臓のミトコンドリアの健康と機能の維持に不可欠です.
科学分野:
- 心血管の生理学
- 代謝の調節
- 心臓の改造
背景:
- 心臓の生理学的成長と関連した 心臓の代謝の再構築を誘導します
- 身体活動が心臓の代謝と再構成に影響を与える正確なメカニズムはまだ不明です.
研究 の 目的:
- 心筋細胞のグルコース代謝の運動による変化が,生理学的心臓の成長に不可欠であるかどうかを調べる.
- 運動によって引き起こされる心臓の改造におけるグリコリチンの作用を明らかにする.
主な方法:
- トレードミルの運動を受けたマウスの放射学,免疫学,代謝学,および生化学的測定.
- 変異した6-フォスフォフルト-2-キナーゼ/フルークトーゼ-2,6-ビスフォスファターゼ (PFKFB) の心臓特異的発現の評価
- メタボロミクスとトランスクリプトミクス分析で,制御された経路と遺伝子セットを特定する.
主要な成果:
- 運動は糖分分解を急激に低下させましたが,適応時に増加し,リン酸フルークトキナーゼ (PFK) の活性を調節しました.
- 血糖分解の減少 (GlycoLoマウス) は心臓機能,筋細胞のサイズ,毛細血管と筋細胞の比率を高めました.
- 変化したPFKFBの活動は,ミトコンドリアの損傷を引き起こす不柔軟性で,グルコース-脂肪酸のサイクルに影響を与え,糖分解は心臓の改造遺伝子を調節する.
結論:
- 運動による心臓の糖分分解の減少は 心臓の生理的な再構成を刺激する.
- 心臓のミトコンドリアの健康維持には 代謝の柔軟性が不可欠です
- 糖分分解活動は心臓の代謝と遺伝子プログラムの再構築の重要なレギュラーです.
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