単一のLgr5幹細胞は,メゼンキマのニッチなしに,クリプト・ヴィルス構造をインビトロで構築する
Toshiro Sato1, Robert G Vries, Hugo J Snippert
1Hubrecht Institute and University Medical Center Utrecht, Uppsalalaan 8, 3584CT Utrecht, The Netherlands.
Nature
|March 31, 2009
まとめ
単一の腸の幹細胞は,培養中に自己組織化して複雑な有機体になることができます. これらのLgr5(+) 幹細胞は,新しいクリプトとビリを形成し,他の細胞タイプなしで腸内皮質の構造を模倣します.
科学分野:
- 胃腸内科 胃腸内科
- 幹細胞生物学 幹細胞生物学
- 発達生物学 発達生物学とは
背景:
- 腸内皮質は,成人哺乳類の高度に再生可能な組織である.
- Lgr5(+) 幹細胞は腸の再生に不可欠であり,暗号の底部に位置しています.
研究 の 目的:
- 腸内クリプトと幹細胞の長期培養条件を確立する.
- 腸内幹細胞の自己組織化能力を in vitroで調査する.
- crypt-villusユニット形成に非上皮のニッチが必要かどうかを判断する.
主な方法:
- 単一マウスの小腸クリプトの長期培養条件を確立する.
- 単一のLgr5(+) 幹細胞を分離し,培養する.
- クリプト分裂と状の上皮細胞領域生成アッセイを用いて.
- 幹細胞の階層を追跡するために追跡実験を行う.
主要な成果:
- 単一の暗号を長期に培養し,複数の暗号分裂イベントを経験しました.
- すべての微分化された細胞タイプを含むビルス状の上皮領域が,培養で生成されました.
- 単一の分類された Lgr5(+) 幹細胞が自己組織化を開始した cryptvillus organoids.
- Lgr5(+) 幹細胞の階層は,オルガノイド内で維持されました.
結論:
- 腸内クリプトヴィルスの単位は,自己組織化構造である.
- 一つの腸の幹細胞は,機能的なクリプト・ヴィルス・ユニットを作ることができます.
- この自己組織化には,非上皮細胞ニッチの存在は必要ありません.
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