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Rapid Generation of Primary Murine Melanocyte and Fibroblast Cultures
Published on: June 26, 2019
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NFIBは,共有されたニッチでの上皮質-メラノサイト幹細胞の行動の支配者です
Chiung-Ying Chang1, H Amalia Pasolli, Eugenia G Giannopoulou
1Howard Hughes Medical Institute, Laboratory of Mammalian Cell Biology and Development, The Rockefeller University, New York, New York 10065, USA.
Nature
|February 8, 2013
まとめ
転写因子NFIBは,毛皮の幹細胞の同期を調整する. ネズミのNfib欠乏は,これを妨害し,髪のサイクルに影響を与えることなくメラノサイト幹細胞の分化を促進し,重要なニッチクロストラクのメカニズムを明らかにします.
科学分野:
- 幹細胞生物学 幹細胞生物学とは
- 皮膚科 皮膚科について
- 分子遺伝学 分子遺伝学
背景:
- 哺乳類の毛胞に含まれる成人の幹細胞は,ニッチ・シグナルを通して組織ホメオスタシスを維持する.
- 毛皮の幹細胞とメラノサイト幹細胞は,髪の再生と染色を調整する.
- 幹細胞のクロストラックの解剖は,系統特異的な突然変異のために困難です.
研究 の 目的:
- ヘアフォリキュルの幹細胞同期の新たなレギュレータを特定する.
- 幹細胞行動の調整における転写因子NFIBの役割を調査する.
- 毛胞のニッチにおける幹細胞間のコミュニケーションの基礎となるメカニズムを解明する.
主な方法:
- ネズミの毛皮幹細胞におけるNfibの条件付き遺伝子ターゲティング.
- 髪のサイクル,卵泡の構造,メラノサイト幹細胞の行動の分析.
- 高通量配列化 (ChIP-seq) と転写プロファイリングによるクロマチン免疫プレシピテーション.
- エンドセリンとKITのシグナル伝達経路の薬理学的抑制.
主要な成果:
- Nfibの欠乏は,毛の幹細胞で,髪のサイクルを変えることなく,幹細胞のシンクロニティを切り離します.
- Nfib欠乏したマウスは,早期のメラニン生成とともに,メラノサイト幹細胞の増殖と分化が強化されている.
- KIT-リガンドは,メラノサイト幹細胞の分化を促進する皮膚パピラ信号として識別されました.
- エンドセリン2 (Edn2) は,NFIB標的遺伝子として特定され,NFIB欠乏性幹細胞で異常な活性化がある.
- エクトピックEdn2はNFIB欠乏症のフェノタイプを誘発し,エンドセリン/KIT阻害はこれらのフェノタイプを救出する.
結論:
- NFIBは,毛皮とメラノサイト幹細胞の行動の重要な調整者です.
- NFIB欠乏性幹細胞における異常なEDN2発現は,早期のメラノサイト分化を促進する.
- KIT-リガンドやエンドセリンシグナル伝達などの要因によって媒介される幹細胞間クロストラックは,ニッチ機能にとって極めて重要です.
- これらのメカニズムを理解することで,髪が白くなること,ストレス,病気に関連した毛胞機能不全についての洞察が得られます.
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