不对称的自我更新和卫星干细胞在肌肉中的参与
Shihuan Kuang1, Kazuki Kuroda, Fabien Le Grand
1The Sprott Center for Stem Cell Research, Ottawa Health Research Institute, Molecular Medicine Program, 501 Smyth Road, Ottawa, ON K1H 8L6, Canada.
骨肌的卫星细胞是干细胞和祖细胞的混合体. Pax7(+) /Myf5(-) 细胞补充卫星细胞池,而Pax7(+) /Myf5(+) 细胞分化,澄清肌肉再生.
科学领域:
- 肌肉生物学 肌肉生物学
- 干细胞研究的研究.
- 再生医学是一种再生医学.
背景情况:
- 卫星细胞对于骨肌肉的生长和修复至关重要.
- 卫星细胞的确切身份 (干细胞,祖细胞或非分化的肌细胞) 仍在争论中.
研究的目的:
- 为了研究卫星细胞的异质性.
- 确定不同卫星细胞群体在肌肉再生中的不同作用.
主要方法:
- 使用了Myf5-Cre和ROSA26-YFPCre-reporter鼠标模型. 使用了Myf5-Cre和ROSA26-YFPCre-reporter鼠标模型.
- 用于Pax7表达卫星细胞的体内追踪.
- 对已识别的卫星细胞种群进行了前性隔离和移植.
主要成果:
- 确定了一组 Pax7(+) 卫星细胞 (10%) 的子集,这些卫星细胞从未表达过 Myf5 (Pax7(+) /Myf5(-)).
- 观察到不对称的细胞分裂产生了Pax7(+) / Myf5(-) 和Pax7(+) / Myf5(+) 后代.
- 证明Pax7(+) / Myf5(-) 细胞自我更新并扩大卫星细胞池,而Pax7(+) / Myf5(+) 细胞经历分化.
结论:
- 卫星细胞包括一个异质的干细胞和承诺的祖先细胞群.
- 这种异质性是维持卫星细胞储备和推动肌肉再生的关键.
- 研究结果为针对神经肌肉疾病的治疗策略提供了见解.
更多相关视频
07:18Identification of Skeletal Muscle Satellite Cells by Immunofluorescence with Pax7 and Laminin Antibodies
Published on: April 19, 2018
06:37Analyzing Satellite Cell Function During Skeletal Muscle Regeneration by Cardiotoxin Injury and Injection of Self-delivering siRNA In Vivo
Published on: September 18, 2019
相关概念视频
The Role of Actin and Myosin in Non-muscle Cells
Cell Motility through Blebbing
Blebbing Through the Matrix
In multicellular...
Formation of Muscle Fibers from Myoblasts
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...
Satellite Stem Cells and Muscular Dystrophy
Renewal of Skin Epidermal Stem Cells
Tissue Renewal without Stem Cells
However, failure of such a system...
