PRDM16安定化によるベージュ脂肪生物生成の翻訳後の制御
Qiang Wang1, Huixia Li2, Kazuki Tajima3
1Division of Endocrinology, Diabetes and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.
Nature
|August 17, 2022
まとめ
研究者は,CUL2-APPBP2をPRDM16タンパク質の安定性の重要なレギュラーとして特定しました. このE3リガスを阻害すると ベージュ色脂肪細胞の形成が促進され,代謝疾患に対する新しい戦略が提供されます.
科学分野:
- 代謝疾患の研究
- 脂肪組織生物学
- タンパク質の調節
背景:
- 茶色とベージュの脂肪組織は 代謝疾患から身を守ります
- PRドメインを含む16 (PRDM16) はベージュアディポサイト生殖を活性化し,治療対象となる.
- PRDM16タンパク質の安定性の調節は十分に理解されていません.
研究 の 目的:
- PRDM16タンパク質の分解に 責任を負うユビキチンE3リガスを特定する.
- 代謝の健康と老化におけるこのE3リガースの役割を調査する.
- この経路をターゲットにすることで,代謝機能障害に対抗できるかどうかを判断する.
主な方法:
- PRDM16のユビキチンE3リガゼとしてCUL2-APPBP2を特定した.
- PRDM16の安定性とベージュアディポサイト生殖に対するCUL2-APPBP2抑制の効果を調べた.
- 老いた脂肪組織におけるCUL2-APPBP2発現を分析した.
- ダイエット誘発の肥満マウスモデルにおけるアディポサイト特有のCUL2-APPBP2消去の影響を研究した.
主要な成果:
- CUL2-APPBP2はPRDM16のポリウビキチネーションを触媒化し,分解を標的とする.
- CUL2-APPBP2の抑制はPRDM16の半減期を延長し,ベージュ色脂肪細胞の形成を促進する.
- 老いた脂肪組織はCUL2-APPBP2が上昇し,PRDM16を分解することで熱生成を抑制する.
- マウスにおけるCUL2- APPBP2の特異的消去により,肥満,グルコース不耐性,インスリン抵抗性,および脂質低下が改善された.
結論:
- CUL2-APPBP2はPRDM16タンパク質の安定性を決定的に抑制する.
- CUL2-APPBP2をターゲットにすることで,脂肪組織におけるPRDM16経路を活性化するための細胞自律的な戦略が提供されます.
- このアプローチは,脂肪細胞の機能障害に関連した代謝疾患の治療に潜在しています.
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