サイクリンD1-Cdk4は,細胞サイクル進行とは無関係にグルコース代謝を制御する
Yoonjin Lee1, John E Dominy2, Yoon Jong Choi3
11] Department of Cancer Biology, Dana-Farber Cancer Institute, Boston, Massachusetts 02115, USA [2] Department of Cell Biology, Harvard Medical School, Boston, Massachusetts 02115, USA [3] Department of Chemistry and Chemical Biology, Harvard University, Cambridge, Massachusetts 02138, USA.
Nature
|May 30, 2014
まとめ
インスリンは,サイクリンD1-Cdk4のような細胞サイクルタンパク質を使用して,PGC-1αアセチル化と肝臓のグルコース生成を調節することにより,グルコースレベルを制御し,糖尿病治療の新たな道を開きます.
科学分野:
- 代謝の調節 メタボリックの調節
- 細胞サイクルコントロール
- 糖尿病に関する研究
背景:
- インスリンは,グルコースの恒常性 (ホメオスタシス) の鍵であり,その不調は糖尿病を引き起こす.
- PGC-1αは,インスリンシグナル伝達と代謝性遺伝子発現を結びつける.
- GCN5とシルトゥイン1は,アセチル化を介してPGC-1αの活性を調節する.
研究 の 目的:
- インスリンの代謝作用における細胞循環機構の役割を調査する.
- インスリンシグナル伝達とグルコース代謝を結びつける分子機構を特定する.
- 糖尿病の治療目標を探求する.
主な方法:
- マウスモデル マウスモデル
- セルベースの高通量化学スクリーニング
- アセチル化とキナーゼ活性を測定するための生化学的測定法.
主要な成果:
- インスリンはサイクリンD1-Cdk4を活性化し,GCN5の活性を増やし,グルコースの産生を抑制します.
- Cdk4阻害剤は,PGC-1αアセチル化を減少させます.
- サイクリンD1の喪失は高血糖を引き起こし,その活性化は糖尿病モデルにおける血糖を正常化する.
結論:
- インスリンは細胞サイクル成分 (サイクリンD1-Cdk4) を利用して,ミトーシス後の細胞におけるグルコースホメオスタシスを調節する.
- この経路は,PGC-1αアセチル化と肝臓のグルコース生成を制御する.
- サイクリンD1-Cdk4をターゲットにすることで,糖尿病の管理に新たな戦略が提供されます.
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