GO:0014841 skeletal muscle satellite cell proliferation: Regeneration, Genes, Functions and Research Methods
Research-grade guide for scientists and biopharma professionals
Key Takeaways
• GO:0014841 describes the multiplication of skeletal muscle satellite cells, the resident stem cells located between the basal lamina and plasmalemma of the muscle fiber.
• Satellite cell proliferation is the main contributor to postnatal muscle growth and is required for adult muscle regeneration after damage.
• Quiescent satellite cells become activated to divide and differentiate in response to muscle injury, a process controlled by niche signals and transcription factors.
• Key regulators include PAX7, MYOD1, MYF5, p27Kip1 (CDKN1B), and the mechanosensitive ion channel PIEZO1.
• Dysregulated satellite cell proliferation contributes to sarcopenia, muscular dystrophies, and impaired regeneration in ageing.
• CRISPR knockout, point mutation, knock-in, and overexpression models enable causal testing of candidate genes in satellite cell proliferation.
Description
Skeletal muscle satellite cell proliferation (GO:0014841) is the biological process by which satellite cells, the resident stem cells of skeletal muscle, multiply to expand their population. Satellite cells are quiescent cells located between the basal lamina and the plasmalemma of the muscle fiber, and they are the main contributors to postnatal muscle growth. In adult muscle, satellite cells become activated to divide and differentiate in response to muscle damage, making this process central to muscle regeneration. Understanding GO:0014841 is therefore essential for researchers studying muscle stem cell biology, regeneration, and diseases characterized by muscle wasting. The process is regulated by a complex interplay of niche-derived signals, transcription factors, and cell-cycle regulators, and its disruption is associated with impaired regeneration in ageing and muscular dystrophies. This article synthesizes authoritative QuickGO annotation and verified PubMed literature to provide a research-grade overview of the genes, mechanisms, and experimental models relevant to GO:0014841.
skeletal muscle satellite cell proliferation At A Glance
| GO ID | GO:0014841 |
|---|---|
| GO term | skeletal muscle satellite cell proliferation |
| Ontology | biological_process |
| Synonym | none |
| Major function | Multiplication of satellite cells leading to expansion of the cell population |
| Cell type | Satellite cells, located between the basal lamina and plasmalemma of the muscle fiber |
| Physiological role | Main contributor to postnatal muscle growth and adult muscle regeneration after damage |
| Regulatory context | Activated by muscle damage; controlled by niche signals and transcription factors |
| Disease relevance | Impaired in ageing, sarcopenia, and muscular dystrophies |
What Is GO:0014841?
GO:0014841 (skeletal muscle satellite cell proliferation) is defined as the multiplication or reproduction of satellite cells, resulting in the expansion of the cell population. Satellite cells are quiescent cells located between the basal lamina and the plasmalemma of the muscle fiber, and they are the main contributors to postnatal muscle growth. In adult muscle, satellite cells become activated to divide and differentiate in response to muscle damage.
Why Is skeletal muscle satellite cell proliferation Important in Cell Biology?
Skeletal muscle satellite cell proliferation is fundamental to postnatal muscle growth and adult muscle regeneration, as satellite cells are the primary source of new myonuclei during hypertrophy and repair. The process is tightly regulated by niche-derived signals and cell-cycle regulators, and its dysregulation contributes to impaired regeneration in ageing and disease. Researchers studying muscle stem cell biology, regenerative medicine, and muscle-wasting conditions therefore require a detailed understanding of GO:0014841 and the genes that control it.
• Satellite cells are the main contributors to postnatal muscle growth.
• Satellite cell proliferation is required for adult muscle regeneration after damage.
• The process supports muscle hypertrophy in response to loading.
• p27Kip1 (CDKN1B) is a key regulator of satellite cell proliferation.
• PIEZO1, a mechanosensitive ion channel, promotes satellite cell function in muscle regeneration.
• Ageing disrupts satellite cell function and regeneration.
• Dysregulation contributes to muscular dystrophies and sarcopenia.
• Single-cell RNA-seq has revealed interactions between satellite cells and fibro-adipogenic progenitors mediated by FGF7 signalling.
• Understanding GO:0014841 informs regenerative medicine and therapeutic strategies.
• CRISPR models enable causal testing of candidate genes in satellite cell proliferation.
What Happens During skeletal muscle satellite cell proliferation?
Quiescence and activation
In simple terms: Satellite cells normally rest quietly, but when muscle is damaged they wake up and start dividing.
In uninjured adult muscle, satellite cells are quiescent and reside between the basal lamina and plasmalemma of the muscle fiber. Upon muscle damage, they become activated to divide and differentiate. This activation is a prerequisite for the expansion of the satellite cell population that characterizes GO:0014841.
Proliferation and expansion
In simple terms: Activated satellite cells multiply to make more copies of themselves.
Activated satellite cells undergo proliferation, resulting in the expansion of the cell population. This proliferative expansion is the defining event of GO:0014841 and is required for postnatal muscle growth and adult regeneration. The process is regulated by cell-cycle regulators such as p27Kip1, which acts as a key regulator of satellite cell proliferation.
Differentiation and fusion
In simple terms: Some of the new cells specialize and fuse to repair muscle fibers.
Following proliferation, satellite cells differentiate and fuse to form new myofibers or repair damaged ones. This step is coupled to the proliferative expansion and is essential for functional muscle regeneration. The balance between proliferation and differentiation is controlled by transcription factors and niche signals.
Niche interactions
In simple terms: Satellite cells talk to neighboring cells to coordinate their behavior.
Satellite cells interact with their niche, including fibro-adipogenic progenitors, through signalling pathways such as FGF7. Single-cell RNA-seq has revealed novel interactions between muscle satellite cells and fibro-adipogenic progenitors mediated by FGF7 signalling. These interactions modulate satellite cell proliferation and regeneration.
Mechanotransduction
In simple terms: Physical forces are sensed by satellite cells to control their activity.
The mechanosensitive ion channel PIEZO1 promotes satellite cell function in muscle regeneration. Mechanotransduction thus contributes to the regulation of satellite cell proliferation and the regenerative response. This highlights the integration of mechanical cues with biochemical signals in GO:0014841.
Key Genes Involved in GO:0014841 skeletal muscle satellite cell proliferation
The following genes and proteins are experimentally implicated in the regulation of skeletal muscle satellite cell proliferation (GO:0014841).
| Gene | Major Role | Research Relevance |
|---|---|---|
| PAX7 | Satellite cell marker and regulator of quiescence and activation | Essential for satellite cell identity and proliferation |
| MYOD1 | Transcription factor driving myogenic differentiation | Regulates the transition from proliferation to differentiation |
| MYF5 | Myogenic regulatory factor | Involved in satellite cell activation and proliferation |
| CDKN1B (p27Kip1) | Cell-cycle inhibitor | Key regulator of satellite cell proliferation |
| PIEZO1 | Mechanosensitive ion channel | Promotes satellite cell function in muscle regeneration |
| FGF7 | Signalling ligand | Mediates satellite cell-fibro-adipogenic progenitor interactions |
| FGFR1 | Receptor for FGF signalling | Transduces FGF7 signals in satellite cells |
| MSTN | Negative regulator of muscle growth | Modulates satellite cell proliferation |
| IGF1 | Growth factor | Promotes satellite cell proliferation and hypertrophy |
| mTOR | Kinase regulating protein synthesis | Supports satellite cell proliferation and growth |
| NOTCH1 | Signalling receptor | Regulates satellite cell activation and proliferation |
| WNT7A | Signalling ligand | Promotes satellite cell proliferation |
| HGF | Growth factor | Activates satellite cells |
| IL6 | Cytokine | Modulates satellite cell proliferation |
| SPRY1 | Inhibitor of RTK signalling | Regulates satellite cell quiescence and activation |
| CD34 | Surface marker | Enriches for satellite cells |
| VCAM1 | Surface marker | Enriches for satellite cells |
How Is skeletal muscle satellite cell proliferation Regulated?
Satellite cell proliferation is regulated by a network of niche-derived signals, transcription factors, and cell-cycle regulators. p27Kip1 (CDKN1B) acts as a key regulator of skeletal muscle satellite cell proliferation. The mechanosensitive ion channel PIEZO1 promotes satellite cell function in muscle regeneration. FGF7 signalling mediates interactions between satellite cells and fibro-adipogenic progenitors. Ageing disrupts satellite cell function and regeneration. Growth factors such as IGF1 and mTOR signalling support proliferation and hypertrophy.
skeletal muscle satellite cell proliferation and Human Disease
| Gene | Disease / Biology | Potential Experimental Model |
|---|---|---|
| CDKN1B (p27Kip1) | Impaired satellite cell proliferation | Knockout mouse or CRISPR KO in satellite cells |
| PIEZO1 | Defective muscle regeneration | Point mutation or KO in satellite cells |
| PAX7 | Satellite cell depletion | Knock-in reporter or KO |
| FGF7 | Impaired satellite cell-FAP interaction | Overexpression or KO |
| MSTN | Muscle hypertrophy | Knockout |
Ageing and sarcopenia
Ageing disrupts satellite cell function and regeneration, contributing to sarcopenia and impaired muscle repair. The decline in satellite cell proliferation is a hallmark of aged muscle.
Muscular dystrophies
Dysregulated satellite cell proliferation contributes to the pathology of muscular dystrophies, where repeated cycles of degeneration and regeneration exhaust the satellite cell pool.
Muscle wasting and cachexia
Impaired satellite cell proliferation is associated with muscle wasting conditions, including cachexia, where regenerative capacity is compromised.
From skeletal muscle satellite cell proliferation-Related Genes to Experimental Models
| Research Question | Suitable Model |
|---|---|
| Is gene X required for satellite cell proliferation? | CRISPR knockout in satellite cells |
| Does a point mutation in gene X affect proliferation? | Point mutation knock-in |
| Does gene X overexpression enhance proliferation? | Overexpression |
| Does gene X interact with FGF7 signalling? | Knock-in tagged allele |
| Does gene X regulate mechanotransduction? | PIEZO1 point mutation |
| Does gene X affect regeneration in vivo? | Knockout mouse with injury model |
How to Study the skeletal muscle satellite cell proliferation Process
| Method | What It Measures | Typical Application |
|---|---|---|
| scRNA-seq | Transcriptomic heterogeneity | Satellite cell-FAP interactions |
| Immunofluorescence | Protein expression and localization | PAX7/MYOD1 detection |
| EdU/BrdU | DNA synthesis | Proliferation quantification |
| CRISPR screen | Gene function | Regulator discovery |
| Western blot | Protein levels | p27Kip1 expression |
| qPCR | mRNA levels | Gene expression |
| Flow cytometry | Cell surface markers | Satellite cell isolation |
| In vivo injury model | Regeneration capacity | Muscle damage repair |
Single-cell RNA-seq
Single-cell RNA-seq reveals interactions between muscle satellite cells and fibro-adipogenic progenitors mediated by FGF7 signalling. This method enables the dissection of heterogeneity in satellite cell populations during proliferation.
Immunofluorescence and lineage tracing
Immunofluorescence for PAX7 and MYOD1 allows visualization of satellite cell activation and proliferation in situ. Lineage tracing confirms the contribution of satellite cells to regenerated muscle.
EdU/BrdU incorporation
EdU or BrdU incorporation measures DNA synthesis and thus proliferation of satellite cells. This is a standard assay for quantifying satellite cell proliferation.
CRISPR screening
CRISPR library screening can identify genes that regulate satellite cell proliferation. This approach enables unbiased discovery of regulators of GO:0014841.
How CRISPR Can Be Used to Study GO:0014841 skeletal muscle satellite cell proliferation
Knockout
CRISPR knockout of candidate genes such as CDKN1B or PIEZO1 in satellite cells can test their requirement for proliferation. Knockout models enable causal inference in GO:0014841.
Point Mutation
Point mutation knock-in can model specific amino acid changes in genes like PIEZO1 to dissect mechanotransduction in satellite cell proliferation.
Knock-in
Knock-in of reporters or tags (e.g., PAX7-GFP) allows lineage tracing and purification of satellite cells. Tagged knock-in of FGF7 can reveal interaction dynamics.
Overexpression
Overexpression of growth factors such as IGF1 or FGF7 can enhance satellite cell proliferation and test sufficiency.
How EDITGENE Supports skeletal muscle satellite cell proliferation Research
Researchers studying skeletal muscle satellite cell proliferation-related genes often need to determine whether a candidate gene is causally involved in the expansion of satellite cells. EDITGENE provides CRISPR-based cell models and screening services to accelerate this discovery.
Contact EDITGENE today to design your custom CRISPR model for skeletal muscle satellite cell proliferation research.
Frequently Asked Questions About skeletal muscle satellite cell proliferation
What is GO:0014841?
GO:0014841 is the biological process of skeletal muscle satellite cell proliferation, defined as the multiplication of satellite cells leading to expansion of the cell population.
What are satellite cells?
Satellite cells are quiescent cells located between the basal lamina and plasmalemma of the muscle fiber, and they are the main contributors to postnatal muscle growth.
What genes are involved in skeletal muscle satellite cell proliferation?
Key genes include PAX7, MYOD1, MYF5, CDKN1B (p27Kip1), PIEZO1, and FGF7.
How is satellite cell proliferation regulated?
It is regulated by niche signals, transcription factors, and cell-cycle regulators such as p27Kip1 and PIEZO1.
Why is satellite cell proliferation important for muscle regeneration?
Satellite cell proliferation is required for adult muscle regeneration after damage and for postnatal muscle growth.
What diseases are linked to defective satellite cell proliferation?
Ageing, sarcopenia, and muscular dystrophies are associated with impaired satellite cell proliferation.
How can I study satellite cell proliferation in the lab?
Methods include scRNA-seq, immunofluorescence, EdU/BrdU incorporation, and CRISPR screening.
What is the role of p27Kip1 in satellite cell proliferation?
p27Kip1 (CDKN1B) is a key regulator of skeletal muscle satellite cell proliferation.
What is the role of PIEZO1 in satellite cells?
PIEZO1 is a mechanosensitive ion channel that promotes satellite cell function in muscle regeneration.
How does FGF7 signalling affect satellite cells?
FGF7 signalling mediates interactions between satellite cells and fibro-adipogenic progenitors.
Conclusion
GO:0014841 (skeletal muscle satellite cell proliferation) is a central biological process for muscle growth and regeneration, governed by a network of transcription factors, cell-cycle regulators, and niche signals. Key genes such as PAX7, CDKN1B, PIEZO1, and FGF7 have been experimentally linked to this process. Understanding these mechanisms is essential for developing therapeutic strategies for muscle-wasting diseases and ageing-related regeneration decline. CRISPR-based models and screening services from EDITGENE can accelerate the functional dissection of candidate genes in this pathway.
References
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- 2. Ma L et al.. 2024. Single-cell RNA-seq reveals novel interaction between muscle satellite cells and fibro-adipogenic progenitors mediated with FGF7 signalling.. J Cachexia Sarcopenia Muscle 15(4):1388-1403 PMID: 38751367
- 3. Dumont NA et al.. 2015. Satellite Cells and Skeletal Muscle Regeneration.. Compr Physiol 5(3):1027-59 PMID: 26140708
- 4. Sousa-Victor P et al.. 2022. Control of satellite cell function in muscle regeneration and its disruption in ageing.. Nat Rev Mol Cell Biol 23(3):204-226 PMID: 34663964
- 5. Chargé SB et al.. 2004. Cellular and molecular regulation of muscle regeneration.. Physiol Rev 84(1):209-38 PMID: 14715915
- 6. Adams GR. 2006. Satellite cell proliferation and skeletal muscle hypertrophy.. Appl Physiol Nutr Metab 31(6):782-90 PMID: 17213900
- 7. Spangenburg EE et al.. 2002. p27Kip1: a key regulator of skeletal muscle satellite cell proliferation.. Clin Orthop Relat Res PMID: 12394472
- 8. Hirano K et al.. 2023. The mechanosensitive ion channel PIEZO1 promotes satellite cell function in muscle regeneration.. Life Sci Alliance 6(2) PMID: 36446523
