c-JunとJunBは,皮膚におけるサイトカイン調節メゼンキマ・エピダーマ相互作用を敵対的に制御する
A Szabowski1, N Maas-Szabowski, S Andrecht
1Division of Signal Transduction and Growth Control Deutsches Krebsforschungszentrum Im Neuenheimer Feld 280 69120, Heidelberg, Germany.
Cell
|December 15, 2000
まとめ
研究者らは,線維芽細胞のAP-1サブユニットが,皮膚細胞の成長と分化を敵対的に制御することを発見しました. IL-1によって調節されるこの相互作用は,表皮再生と組織バランスに影響を与えます.
科学分野:
- 発達生物学 発達生物学について
- セルラー・シグナリング
- 皮膚科 皮膚科について
背景:
- メゼンキマ細胞と上皮細胞の相互作用は,臓器の発達と組織の維持に不可欠です.
- この細胞のクロストークは,細胞表面タンパク質と溶解性因子に依存し,しばしば遺伝子転写によって制御されます.
- 転写因子のAP-1ファミリーは,これらの細胞プロセスに役割を果たします.
研究 の 目的:
- 皮膚生物学におけるAP-1転写因子ダイマーの特定の機能を調査する.
- 繊維芽細胞によって媒介されるケラチノサイトの行動を制御するパラクリンのシグナル伝達機構を理解する.
主な方法:
- 原始的なヒトケラチノサイトと遺伝子組み換えマウスの線維芽細胞 (ワイルドタイプ,c-jun(-/-),junB(-/-) を使用して皮膚組織を再構成する.
- ケラチノシートの増殖と分化に影響を与える,線維芽細胞媒介のパラクリン信号の分析.
- 重要な成長因子を調節するインタールイキン-1 (IL-1) の役割の調査.
主要な成果:
- 線維芽細胞内のc-JunとJunBのAP-1サブユニット間の敵対的な機能が特定されました.
- この対立が,繊維芽細胞媒介によるケラチノ細胞増殖と分化制御に影響することを実証した.
- このメカニズムは,ケラチノ細胞成長因子 (KGF) と花粉細胞マクロファージコロニー刺激因子 (GM-CSF) のIL-1依存の調節にたどり着きました.
結論:
- 線維芽細胞におけるAP-1サブユニットの相対的な活性化は,表皮再生を指揮する.
- AP-1サブユニットによる非細胞自律的調節は,皮膚組織ホメオスタシスの維持に不可欠である.
- 特定のAP-1ダイマーの活動は,上皮細胞の行動を制御するパラクリン因子の生成に影響します.
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