in vivoでの再プログラムにより,トーティポテンシー特性を有するテラトーマとiPS細胞が生成されます
María Abad1, Lluc Mosteiro, Cristina Pantoja
1Tumour Suppression Group, Spanish National Cancer Research Centre (CNIO), Madrid E-28029, Spain.
Nature
|September 13, 2013
まとめ
誘導性多能幹細胞 (iPS細胞) は,生物体内で生成される (in vivo再プログラム). これらの細胞はトーティポテンシー特性を発揮し,再生医療に新たな道を開く.
科学分野:
- 幹細胞生物学 幹細胞生物学
- 再生医学は,再生医療である.
- エピジェネティクス エピジェネティクス
背景:
- 誘導性多能幹細胞 (iPS細胞) は,治療の可能性を秘めている.
- 組織内でのin vivo再プログラミングの実現可能性は,依然としてほとんど未探究のままである.
研究 の 目的:
- マウスの体内再プログラムの可能性と特徴を調査する.
- 再プログラミング因子が,生体組織内で多能性を誘発できるかどうかを判断する.
主な方法:
- マウスにおけるOct4,Sox2,Klf4,c-Mycの一時的誘導
- 様々な臓器におけるテロトーム形成と細胞マーカー (NANOG) の分析.
- 血液形成細胞の再プログラミングを評価するための骨髄移植.
- 生体内で生成されたiPS細胞のトランスクリプトーム分析と,体外でのiPS細胞と胚性幹細胞 (ES細胞) の比較.
主要な成果:
- フェクター誘導後,複数の臓器で形成されたテラトーマは,in vivo再プログラムが成功したことを示しています.
- NANOGを発現する分化細胞は,胃,腸,臓,腎臓で発見されました.
- 血液形成細胞は体内で再プログラムされ,血液中の循環中のiPS細胞が検出されました.
- In vivo iPS細胞は,ES細胞とより大きな類似性を示し, trofhectoderm 系統への貢献を強化し,より原始的な状態を示唆しました.
結論:
- In vivo再プログラミングは可能であり,トーティポテンシー特性を有する細胞を生成することができる.
- In vivoで生成されたiPS細胞は,標準のiPSまたはES細胞と比較してユニークな性質を持っています.
- これらの発見は,将来の再生医療の応用に重大な意味を持ちます.
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