長期培養は,大腸幹細胞の損傷修復サイクルを捕捉する
Yi Wang1, I-Ling Chiang1, Takahiro E Ohara1
1Department of Pathology and Immunology, Washington University School of Medicine, Saint Louis, MO 63110, USA.
Cell
|November 12, 2019
まとめ
研究者は,大腸炎に関連した再生性幹細胞 (CARSC) の新しい集団を特定し,大腸粘膜の修復に不可欠である. 新しい2Dモデルで in vivo 損傷と再生サイクルを模倣し,低酸素とERのストレスの役割を明らかにします.
科学分野:
- 胃腸内科
- 幹細胞生物学
- 再生医療
背景:
- 大腸の表皮は損傷を受け,修復され,しばしば炎症による.
- この生体再生を促す特定の幹細胞は完全に理解されていません.
- 現存する in vitro モデルは,修復中の in vivo 表皮の変化の重要な特徴を欠いている.
研究 の 目的:
- 腸内粘膜の修復を担当する幹細胞群を特定する.
- 大腸の損傷と再生を in vivo で再現する in vitro モデルを開発する
- 大腸炎における上皮再生の基礎にある分子メカニズムを調査する.
主な方法:
- マウスモデルにおけるHopx+大腸炎関連再生性幹細胞 (CARSCs) の検出
- 長期にわたる自己組織化2次元上皮単層システムの構築
- 2Dモデルにおける低酸素と内プラズマ網膜のストレスに対する細胞反応の分析.
主要な成果:
- 粘膜修復に寄与する独特のHopx+ CARSC群が特定されました.
- これらのCARSCは胎児のようなマーカーを示し,高縮性クリプトから生じる.
- 2Dモデルでは in vivo ホメオスタシス・損傷・再生サイクルを成功裏に再現した.
- 低酸素とERストレスが周期的な細胞状態の変化を媒介することが判明しました.
結論:
- Hopx+ CARSCsは,大腸粘膜修復の重要な媒介者である.
- 開発された2Dの上皮モデルは再生プロセスを研究するための貴重なプラットフォームを提供します.
- 炎症性疾患における腸内修復過程における幹細胞の行動に影響を与える環境的要因は,低酸素とERストレスである.
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