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Isolation of Type I and Type II Pericytes from Mouse Skeletal Muscles
Published on: May 26, 2017
骨格筋の祖先細胞のPax3/Pax7依存の集団である
Frédéric Relaix1, Didier Rocancourt, Ahmed Mansouri
1C.N.R.S. URA 2578, Department of Developmental Biology, Pasteur Institute, 75724 Paris Cedex 15, France. frelaix@pasteur.fr
Nature
|April 22, 2005
まとめ
研究者らは,発達の過程で骨格筋の形成に不可欠な筋肉の祖先細胞の新しい集団を発見しました. これらのPax3 / Pax7依存細胞は,筋肉の成長に不可欠であり,筋肉疾患の細胞治療の可能性を持っています.
科学分野:
- 発達生物学 発達生物学とは
- 細胞生物学 細胞生物学
- 遺伝学 遺伝学とは
背景:
- 骨格筋の形成には,胚性および胎児性ミオゲネシスが含まれています.
- 後のミオゲネシス段階の分子調節は,あまり理解されていないままである.
- ペアリングボックスタンパク質3と7 (Pax3とPax7) は,発達における重要な転写因子である.
研究 の 目的:
- 脊椎動物の骨格筋発達の後期段階に関与する新しい細胞集団を特定し,特徴づけること.
- 定住する筋肉の原始細胞におけるPax3とPax7の役割を解明する.
- これらの細胞が筋肉疾患における治療的な応用の可能性を評価する.
主な方法:
- Pax3をターゲットとした緑色光タンパク質 (GFP) レポーターを使用して,細胞集団を追跡しました.
- 遺伝子発現プロフィールを分析し,特にPax3,Pax7,および骨格筋特異的なマーカーを探しました.
- Pax3とPax7の遺伝子ノックアウトが筋肉の発達に及ぼす影響を研究した. in vivo.
主要な成果:
- Pax3とPax7を発現する新しい原始細胞集団が特定されたが,骨格筋特異的なマーカーが欠けていた.
- これらの細胞が定着し,増殖する筋肉の先駆体であり,肌性となることを示した.
- Pax3とPax7の欠如は,筋肉の発達を停止し,細胞死亡または非ミオジェニックの運命につながることを観察しました.
結論:
- 定住するPax3/Pax7依存の原始細胞集団は,骨格筋形成に不可欠である.
- これらの細胞は,胚および胎児の発達を通して,ミオゲン細胞の重要な源である.
- この発見は,筋肉の発達と筋肉疾患に対する潜在的な細胞ベースの治療法を理解するための意味を持つ.
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