胚の筋肉の祖先と衛星細胞の共通のソミト起源である
Jérôme Gros1, Marie Manceau, Virginie Thomé
1Laboratoire de Génétique et de Physiologie du Développement, Developmental Biology Institute of Marseille, CNRS UMR 6545, Université de la Méditerranée, Campus de Luminy, case 907, 13288 Marseille Cedex 09, France.
Nature
|April 22, 2005
まとめ
骨格筋の成長は,筋肉の祖先に依存しています. この研究は,胚の筋肉の祖先と成人の衛星細胞は,背面のソミット部である皮膚皮質から発生することを明らかにしています.
科学分野:
- 発達生物学 発達生物学とは
- 骨格筋の生物学について
- 細胞系統の追跡 細胞系統の追跡
背景:
- 胚および成人の骨格筋の成長は,筋肉の祖先細胞に依存しています.
- これらの重要な筋肉の祖先の正確な胚の起源は,ほとんど不明のままです.
- 祖先の起源を理解することは,筋肉の発達と再生の鍵です.
研究 の 目的:
- 骨格筋の祖先の胚の起源を特定するために.
- 大人の筋肉幹細胞 (衛星細胞) がこの胚の起源を共有しているかどうかを判断する.
- 筋肉の原始細胞の発達経路を解明する.
主な方法:
- チーク・ソミット・エレクトロポーレーションで,緑色光タンパク質 (GFP) を使って,系統を追跡する.
- ビデオコンフォカル顕微鏡で,発達中の細胞の動きを追跡します.
- 細胞の寄与と移動を評価するためのクイールチックの移植実験.
主要な成果:
- ソミットの背面部分である皮膚皮質は,筋肉の祖先の源泉として特定されました.
- これらの祖先は,胚および胎児の発達中に幹の筋肉の成長に貢献します.
- 長期的な系統分析は,衛星細胞が同じ皮膚皮質細胞集団から由来することを確認しました.
結論:
- 胚の筋肉の祖先と成人の衛星細胞は,共通の発達の起源を共有しています.
- この起源は,dermomyotomeまで遡ることができます.
- 生命の各段階における筋肉の祖先の統一された起源を確立する.
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