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Updated: Jun 2, 2026

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Planarian Immobilization, Partial Irradiation, and Tissue Transplantation
Published on: August 6, 2012
クロノジェニック・ネボブラストは,平面再生の基礎となる多能性成人幹細胞である
Daniel E Wagner1, Irving E Wang, Peter W Reddien
1Howard Hughes Medical Institute, Department of Biology, Massachusetts Institute of Technology (MIT), Whitehead Institute for Biomedical Research, 9 Cambridge Center, Cambridge, MA 02142, USA.
まとめ
プラナリア再生は,クローノジェニックネオブラスト (cNeoblasts) と呼ばれる成人の多能幹細胞に依存しています. これらの広く分布する細胞は,すべての種類の細胞を生成することができ,小さな断片から再生を可能にします.
科学分野:
- 発達生物学 発達生物学について
- 幹細胞生物学 幹細胞生物学
- 再生医学は,再生医療である.
背景:
- 多能細胞は,胚の発達中にすべての細胞タイプを生成します.
- 成人の組織補充は,典型的には,系統限定幹細胞に起因する.
- プラナリアンは驚くべき再生を展し,増殖するネボブラストを必要としますが,その性質 (多能対系統制限) は議論されています.
研究 の 目的:
- 平面再生の細胞基礎を調査する.
- 平面的再生が多能幹細胞または複数の系統制限細胞によって媒介されているかどうかを判断する.
主な方法:
- プラナリアンの放射線照射により,既存のネボブラストを除去する.
- ネボブラストの単細胞移植を放射線を受けた宿主に.
- ネボブラストの可能性を評価するために,In vivoコロニー形成測定法.
主要な成果:
- 大規模な子孫コロニーを in vivo で形成できるクローノジェニックネオブラスト (cNeoblasts) を特定した.
- 移植された単一のcネオブラストは,致死的に放射線を浴びた平面生物の再生を回復させた.
- 新芽細胞は,神経細胞や腸内細胞を含む分化細胞を産生し,体全体に分布していた.
結論:
- プラナリア人は,広く分布する成人の多能幹細胞 (cネオブラスト) を有している.
- これらのcネオブラストは,平面生物の驚くべき再生能力に責任があります.
- この発見は,再生における成体幹細胞の機能に関する伝統的な見解に異議を唱えている.
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