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Updated: Feb 21, 2026
10:03
Transplantation of Induced Pluripotent Stem Cell-derived Mesoangioblast-like Myogenic Progenitors in Mouse Models of Muscle Regeneration
Published on: January 20, 2014
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Hb-EGF directs systemic muscle repair.
Haley C Dean1, Vishnu M Saraswathy1, Amulya Saini1
1Department of Developmental Biology, Washington University in St. Louis, St Louis, MO 63108, USA.
Development (Cambridge, England)
|February 20, 2026
Summary
Large and small muscle injuries trigger different repair processes. Systemic injuries activate Heparin binding epidermal-like growth factor (Hb-EGF) for repair, unlike local injuries.
Area of Science:
- Regenerative Medicine
- Developmental Biology
- Molecular Biology
Background:
- Regenerative capacity varies significantly based on injury scale, tissue type, and species.
- While small skeletal muscle injuries regenerate fully in vertebrates, large-scale damage often results in incomplete repair and functional deficits.
Purpose of the Study:
- To investigate whether distinct regenerative programs are activated by small- versus large-scale muscle injuries.
- To elucidate the molecular mechanisms underlying differential muscle repair in response to injury magnitude.
Main Methods:
- Development of a systemic muscle injury model in zebrafish.
- Transcriptomic analysis of muscle and non-muscle tissues following injury.
- Functional assessment of Heparin binding epidermal-like growth factor (Hb-EGF) in muscle repair.
Main Results:
- Systemic and local muscle injuries elicit quantitatively and qualitatively distinct molecular responses.
- Systemic muscle injury induces Heparin binding epidermal-like growth factor (Hb-EGF) expression in the epidermis.
- Hb-EGF is essential for systemic muscle repair but not for local muscle repair.
Conclusions:
- Large-scale (systemic) and small-scale (local) muscle injuries activate different regenerative programs.
- Heparin binding epidermal-like growth factor (Hb-EGF) plays a crucial role in systemic muscle regeneration.
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