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Updated: Aug 16, 2025

Author Spotlight: Investigating Cellular and Molecular Dynamics During Muscle Regeneration Using Cutting-Edge Single-Cell Technologies
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Muscle injury causes long-term changes in stem-cell DNA methylation.

Tal Falick Michaeli1,2, Ofra Sabag1, Rimma Fok1

  • 1Department of Developmental Biology and Cancer Research, Institute for Medical Research Israel-Canada, Hebrew University Medical School, Jerusalem 91120, Israel.

Proceedings of the National Academy of Sciences of the United States of America
|December 19, 2022
PubMed
Summary
This summary is machine-generated.

Muscle stem cell activation during injury involves epigenetic changes, specifically DNA methylation, essential for muscle regeneration. This molecular memory adapts stem cells for future physiological events.

Keywords:
developmentepigeneticspriming

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Area of Science:

  • Muscle stem cell biology
  • Epigenetics
  • Regenerative medicine

Background:

  • Muscle injury triggers stem cell activation for tissue repair.
  • Stem cell differentiation into myocytes is crucial for muscle regeneration.

Purpose of the Study:

  • To investigate the epigenetic modifications in muscle stem cells during regeneration.
  • To understand the role of methylation patterns in myogenesis and adaptation.

Main Methods:

  • Analysis of DNA methylation patterns in muscle stem cells.
  • Investigating gene regulatory elements associated with myogenesis.
  • Studying the effects of injury and pregnancy on muscle stem cells.

Main Results:

  • Muscle injury induces significant DNA methylation changes in stem cells.
  • These epigenetic alterations are necessary for stem cell activation and myocyte differentiation.
  • Circulating factors mediate the spread of these epigenetic changes to satellite cells in other muscles.
  • Pregnancy also induces similar stable methylation states in muscle stem cells.

Conclusions:

  • Epigenetic reprogramming via methylation is a key mechanism for muscle stem cell activation and regeneration.
  • Muscle stem cells possess a stable molecular memory of past physiological events, enabling long-term adaptation.