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マウスの胚性幹細胞の多軸自己組織化特性
Leonardo Beccari1, Naomi Moris2, Mehmet Girgin3
1Department of Genetics and Evolution, University of Geneva, Geneva, Switzerland.
Nature
|October 5, 2018
まとめ
マウスの胚性幹細胞 (ESC) は自発的にガストルロイドを形成し,3つの体軸を確立します. この突破は哺乳類の早期発育と遺伝子調節を 研究するための新しいモデルを提供します
科学分野:
- 発達生物学
- 幹細胞生物学
- 遺伝学
背景:
- 哺乳類の体平面形成は,胚の植え付け直後に複数の軸を確立することを含む.
- 遺伝子の規制ネットワークは 初期の発達期に空間的および時間的転写を調整します
- 植入後の初期段階の研究は,実験の限界のために困難です.
研究 の 目的:
- マウスの胚性幹細胞 (ESC) の自己組織化能力を in vitro で調査する.
- 哺乳類の早期発達の現象を研究するためのモデルシステムを開発する.
- ボディの軸を確立するメカニズムを探求する.
主な方法:
- ネズミのESCを刺激し,ガストリュレーションのようなイベントと延長を in vitro で行います.
- 神経系,内皮系,内皮系を観察する.
- 前後軸に沿ったコリネアホックス遺伝子発現を含む遺伝子発現パターンの分析
主要な成果:
- 胚の空間的および時間的遺伝子発現を模倣する"ガストロロイド"に自発的に組織されるESC.
- ガストロロイドは3つの主要な体軸を確立し,相互依存のメカニズムを示しています.
- このシステムはホックス遺伝子の共線性を含む 軸性遺伝子制御システムの特徴を示した.
結論:
- 集積されたESCは,体軸形成の固有の自己組織化能力を有しています.
- ガストロロイドは早期哺乳類の胚形成を研究するための貴重な補足システムです.
- このモデルは,哺乳類の発達を制御する遺伝子規制ネットワークの研究を容易にする.
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