鳥のニューラル・クライストの軸性同一性と細胞運命を再プログラムする
Marcos Simoes-Costa1, Marianne E Bronner2
1Division of Biology and Biological Engineering, California Institute of Technology, Pasadena, CA 91125, USA. Department of Molecular Biology and Genetics, Cornell University, Ithaca, NY 14853-2703, USA.
まとめ
頭蓋のニューラル・クライスト細胞は顔を形成しますが,幹細胞は形成しません. 研究者達は 神経頂部の幹細胞が 頭蓋骨のような能力を得て 骨の形成を可能にする 重要な遺伝子回路を特定しました
科学分野:
- 発達生物学
- 遺伝学
- 進化生物学
背景:
- 脊椎動物のニューラル・クライスト細胞は 発達の可能性と運命において 地域的な違いを示す.
- 頭蓋骨の神経細胞だけが in vivoで頭蓋骨の骨格の発達に寄与する.
- 脳のニューラル・クライストの 専門化の背後にある 規制メカニズムを理解することは 極めて重要です
研究 の 目的:
- 頭蓋骨の神経頂部細胞に特異的な特徴を与える 制御プログラムを調査する.
- 頭蓋骨特異的な転写因子の間の規制関係を特定し,特徴づけること.
- 制御回路が神経幹細胞を再プログラムできるかどうか
主な方法:
- 胚における頭蓋骨と幹神経の全ゲノムプロファイリングのために,軸レベルの特定の強化剤を使用した.
- 頭蓋骨特異的な転写因子の間の規制関係を特定し,特徴づけました.
- 特定された遺伝子調節回路の構成要素を幹神経頂細胞に実験的に導入した.
主要な成果:
- 頭蓋骨特異の転写因子とその規制的関係を特定した.
- これらの因子を幹ニューラル・クライスト細胞に導入すると そのアイデンティティが変化することを示した.
- ニューラル・クライストの細胞が 細胞内でコンドロブラストを 形成する能力を得ていることを示しました
結論:
- 遺伝子調節回路は 神経頂部の細胞の運命を決定する鍵です
- 特定の転写因子ネットワークは,頭蓋骨の神経頂上を頭蓋骨面の発達能力で満たしています.
- これらの発見は,治療的な応用のためにニューラル・クライスト由来の細胞タイプを再プログラムするための潜在的な戦略を示唆しています.
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