PPARのガンマ2刺激によるアディポゲネシスには,トランスクリプションコアクティベーターTRAP220が必要です
Kai Ge1, Mohamed Guermah, Chao-Xing Yuan
1Laboratory of Biochemistry and Molecular Biology, The Rockefeller University, 1230 York Avenue, New York, New York 10021, USA.
Nature
|May 31, 2002
まとめ
TRAP220タンパク質は,TRAP複合体内のPPARガンマ(2) -選択的共活性化剤として作用し,アディポゲネシスに不可欠です. 欠乏すると脂肪細胞の分化が妨げられるが,筋肉細胞の発達は妨げられない.
科学分野:
- 分子生物学は分子生物学である.
- 細胞生物学 細胞生物学
- バイオケミストリー バイオケミストリー
背景:
- TRAP (甲状腺ホルモン受容体関連タンパク質) 複合体は,メディエーターとも呼ばれ,転写共同活性化剤です.
- TRAP220は,核受容体と相互作用するTRAP複合体のサブユニットです.
- ペロキシソーム増殖器活性化受容体ガンマ (((2) (PPARガンマ (((2)) は,アディポゲネシスに不可欠である.
研究 の 目的:
- PPARガンマ (((2) 媒介のアディポゲネシスにおけるTRAP220の役割を調査する.
- TRAP220の機能が特定の分化経路に特異的であるかどうかを判断する.
主な方法:
- トラップ220ノックアウトマウスからの繊維芽細胞培養.
- アディポゲネシスとミオゲネシスの刺激.
- 遺伝子発現とタンパク質対タンパク質の相互作用の分析.
- インビトロコアクティベーターアッセイ.
主要な成果:
- トラップ220 (((-/-) 線維芽細胞は,PPARガンマ (((2) 刺激によるアディポゲネシスを受けることができなかった.
- Trap220 (((-/-) 線維芽細胞では,真髄形成は影響を受けませんでした.
- TRAP220は,PPARガンマ(2) トランスクリプションを in vitro で直接共活性化します.
- TRAP220-PPARガンマ(2) 相互作用はリガンドに依存しています.
結論:
- TRAP220は,TRAP複合体を通してPPARガンマ(2) 選択的共活性化剤として作用する.
- TRAP220はアディポゲネシスには不可欠ですが,線維芽細胞のミオゲネシスには欠かせません.
- これは,特異な細胞分化経路の調節におけるTRAP220の特殊な役割を強調しています.
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