PPARγ-FGF1軸は,適応性脂肪の再構築と代謝性ホメオスタシスのために必要です
Johan W Jonker1, Jae Myoung Suh, Annette R Atkins
1Gene Expression Laboratory, Salk Institute for Biological Studies, 10010 North Torrey Pines Road, La Jolla, California 92037, USA.
Nature
|April 24, 2012
まとめ
フィブロブラスト成長因子1 (FGF1) は,脂肪組織の改造と代謝的恒常性において極めて重要です. PPARγによるレギュレーションは,高脂肪食による糖尿病と脂肪組織機能障害の予防に不可欠です.
科学分野:
- メタボリックホメオスタシス
- アディポス組織生物学
- エンドクリノロジー エンドクリノロジー
背景:
- 栄養素の変動中に代謝性ホメオスタシスには,脂肪組織の再構築が不可欠です.
- 脂肪組織の適応を調節するメカニズムは,まだ十分に理解されていない.
- フィブロブラスト成長因子1 (FGF1) は,様々な生理学的プロセスに関与しています.
研究 の 目的:
- 栄養素の利用可能性に応じて脂肪組織の再構築の重要なレギュレータを特定する.
- メタボリックホメオスタシスとインスリン感受性におけるFGF1の役割を調査する.
- 脂肪組織におけるFGF1とPPARγの調節関係を解明する.
主な方法:
- FGF1ノックアウトマウスと高脂肪ダイエットチャレンジを利用した.
- 脂肪組織のヒストポトロジー,血管系,炎症,脂肪細胞の特徴を分析した.
- PPARγによるFGF1の転写調節を,PPAR応答要素を用いて調査した.
主要な成果:
- FGF1ノックアウトマウスは,高脂肪食で攻撃的な糖尿病フェノタイプと異常な脂肪膨張を示しています.
- FGF1の欠乏は,脂肪組織の血管病理,炎症,脂肪死につながる.
- PPARγは,PPAR応答要素を介して脂肪組織におけるFGF1誘導を直接調節する.
結論:
- PPARγFGF1軸は,代謝ホメオスタシスとインスリン感受性の維持に不可欠です.
- FGF1は,脂肪組織が食事の課題に適応する上で重要な役割を果たします.
- PPARγFGF1経路の調節障害は,食事による代謝疾患に寄与する.
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