Related Experiment Video
Updated: Jun 8, 2026
07:18
Identification of Skeletal Muscle Satellite Cells by Immunofluorescence with Pax7 and Laminin Antibodies
Published on: April 19, 2018
Transcriptional networks that regulate muscle stem cell function.
Vincent G Punch1,2, Andrew E Jones1,2, Michael A Rudnicki1,2
1Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Canada.
Wiley Interdisciplinary Reviews. Systems Biology and Medicine
|September 14, 2010
Summary
Muscle stem cells, including embryonic progenitor cells and adult satellite cells, are crucial for muscle growth and repair. Signaling and transcriptional networks precisely control their behavior, fate, and regenerative potential.
Area of Science:
- Muscle biology
- Stem cell research
- Developmental biology
Background:
- Muscle stem cells are essential for muscle development, postnatal growth, and regeneration.
- These cells exist as distinct populations in embryonic and adult tissues.
- Their behavior is regulated by complex signaling and transcriptional networks.
Purpose of the Study:
- To review the signaling and transcriptional networks governing muscle stem cell behavior.
- To explore mechanisms regulating muscle progenitor cell specification, survival, and behavior.
- To discuss parallels between embryonic muscle progenitor cells and adult satellite cells.
Main Methods:
- Review of existing literature on muscle stem cell biology.
- Analysis of signaling pathways involved in muscle stem cell regulation.
- Examination of transcriptional networks controlling stem cell fate and function.
Main Results:
- Identified key signaling and transcriptional networks essential for muscle stem cell specification, survival, and behavior.
- Detailed the processes of muscle stem cell activation, self-renewal, proliferation, differentiation, and fusion.
- Highlighted conserved regulatory mechanisms between embryonic and adult muscle stem cells.
Conclusions:
- Precise control of muscle stem cell activity is achieved through intricate extrinsic signaling and active transcriptional networks.
- Understanding these networks is vital for comprehending muscle growth and regeneration.
- Parallels exist in regulatory mechanisms across different muscle stem cell populations, offering insights into conserved biological principles.
Related Concept Videos
02:23Master Transcription Regulators
Master transcription regulators are regulatory proteins that are predominantly responsible for regulating the expression of multiple genes. Often these genes work in concert to drive a complex process. Activation of a master transcription regulator can lead to a cascade of transcriptional activation necessary for that outcome. These regulators can directly bind to the regulatory sequences of the various genes involved, or they can indirectly regulate transcription by binding to regulatory...
01:21Satellite Stem Cells and Muscular Dystrophy
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...
01:13Formation of Muscle Fibers from Myoblasts
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 factors...
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 factors...
01:30General Transcription Factors
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...
01:29Somatic to iPS Cell Reprogramming
Reprogramming alters the gene expression in somatic cells, transforming them into induced pluripotent stem (iPS) cells over several generations. Scientists can reprogram cells by introducing genes for four transcription factors—Oct4, Sox2, Klf4, and c-Myc (OSKM) by viral or non-viral methods. These factors are also known as Yamanaka factors after Shinya Yamanaka, who first generated iPS cells using mouse skin cells. Yamanaka was awarded the Nobel Prize in Physiology or Medicine in 2012 for this...
02:16Transcription Factors
Tissue-specific transcription factors contribute to diverse cellular functions in mammals. For example, the gene for beta globin, a major component of hemoglobin, is present in all cells of the body. However, it is only expressed in red blood cells because the transcription factors that can bind to the promoter sequences of the beta globin gene are only expressed in these cells. Tissue-specific transcription factors also ensure that mutations in these factors may impair only the function of...