フィブロブラスト成長因子2が,マウスの肢体および外眼筋からの筋肉前駆細胞に及ぼす影響
bioRxiv : the preprint server for biology
|September 2, 2025
まとめ
フィブロブラスト成長因子2 (FGF2) は骨格筋の前駆細胞の増殖と分化を促進する. しかし,FGF2はミオチューブ融合を低下させ,アパート症候群のような状態でミオファイバーの発達に潜在的に影響を及ぼします.
科学分野:
- 筋肉生物学
- 細胞・分子生物学
- 発達生物学
背景:
- 繊維細胞成長因子2 (FGF2) は,骨格筋の発達と成長における役割として認識されています.
- 筋肉の形成と再生に不可欠である.
研究 の 目的:
- 眼外筋と四肢骨格筋の2つの異なった筋細胞前駆体集団にFGF2のインビトロ効果を調査する.
- これらの細胞の増殖,分化,融合に対するFGF2の影響を決定する.
主な方法:
- 光活性化細胞分類 (FACS) を用いてEECD34とPAX7陽性菌原細胞を分離する.
- 増殖または分化媒体のFGF2で細胞をインビトロ培養および処理する.
- 細胞増殖,分化,融合速度の評価,および繊維細胞成長因子受容体 (FGFR) の発現.
主要な成果:
- EECD34とPAX7陽性の細胞は,FGF2への反応として,有意に増殖を示した.
- FGF2治療により,両方の細胞群の分化が増加しました.
- FGF2の存在で細胞が多核ミオチューブに融合する際の顕著な減少が観察された.
結論:
- FGF2は骨格筋細胞にプレイオトロピー効果を発揮し,ミオチューブ融合をインビトロで抑制しながら増殖と分化を促進します.
- これらの発見は,FGFR2変異に関連した,アパート症候群に関連する外眼筋の縮小と数の潜在的な説明を提供します.
さらに関連する動画
10:28Direct Reprogramming of Human Fibroblasts into Myoblasts to Investigate Therapies for Neuromuscular Disorders
Published on: April 3, 2021
6.5K
11:25FACS-Isolation and Culture of Fibro-Adipogenic Progenitors and Muscle Stem Cells from Unperturbed and Injured Mouse Skeletal Muscle
Published on: June 8, 2022
6.4K
関連する概念動画
Introduction to Fibroblasts
3.2K
Rudolph Virchow discovered spindle-shaped cells called fibroblasts in 1858. Inactive fibroblasts, called fibrocytes, become activated by various stimuli, such as growth factors and inflammatory cytokines. Activated fibroblasts play a crucial role in wound healing, inflammation, formation of new blood vessels, and cancer progression. Uncontrolled activation of fibroblasts results in fibrosis, the excess deposition of fibrous tissue, which can lead to scarring and affect normal organs. This...
3.2K
Satellite Stem Cells and Muscular Dystrophy
2.0K
Satellite stem cells or myosatellite cells are quiescent stem cells that Alexander Mauro first identified in 1961. These cells are located between the sarcolemma, the plasma membrane of muscle fibers, and the basal lamina, the connective tissue sheath covering it. These mononucleated cells are activated in response to muscle injury, can transform into myoblasts, and may form or repair muscle fibers. Myosatellite cells can provide additional myonuclei for muscle regeneration or return to a...
2.0K
Formation of Muscle Fibers from Myoblasts
5.1K
De novo myogenesis, or the formation of muscle fibers, begins during the early embryonic stages. The skeletal muscle is formed from somites– blocks of embryonic cell layers. The somites are further divided into dermatomes, myotomes, sclerotomes, and syndetomes. Among these, the myotomes give rise to muscle fibers.
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...
Muscle progenitor cells (MPCs) are formed from the myotomes. MPCs express genes that encode the transcription factors Pax3 and Pax7. Along with Pax 3/7, other transcription...
5.1K
