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After cellular or tissue damage, the resident stem cells present in the human body can locally repair and regenerate the damaged tissue or organ. However, even though some tissues do not have stem cells, they can repair and regenerate with the help of pre-existing cells. For example, beta cells of the pancreas and hepatocytes of the liver can divide to renew and regenerate the tissue. Here, both cell division and cell death are well regulated by homeostasis.
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Updated: Sep 16, 2025

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Unraveling the Complex Cellular Repair Mechanisms Following Myocardial Infarction.

Ruiling Chen1,2, Yalin Fu2, Ling Hu2

  • 1The Key Laboratory of Medical Electrophysiology of Ministry of Education, Medical Electrophysiological Key Laboratory of Sichuan Province, Collaborative Innovation Center for Prevention and Treatment of Cardiovascular Disease of Sichuan Province, Institute of Cardiovascular Research, Southwest Medical University, Luzhou 646000, China.

International Journal of Molecular Sciences
|July 12, 2025
PubMed
Summary
This summary is machine-generated.

Cell-based therapies show promise for repairing heart damage after myocardial infarction (MI). This review explores how different cells aid heart repair, offering insights for future clinical trials in cardiac regenerative medicine.

Keywords:
cardiac explantscellular repairmechanismmyocardial infarctionnon-cardiac stem cells

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Area of Science:

  • Cardiovascular Biology
  • Regenerative Medicine
  • Cell Biology

Background:

  • Myocardial infarction (MI) remains a leading cause of mortality and morbidity worldwide.
  • Current treatments for MI are limited in preventing adverse ventricular remodeling and heart failure.
  • Understanding cellular repair mechanisms post-MI is crucial for developing effective therapies.

Purpose of the Study:

  • To elucidate the regenerative mechanisms by which diverse cell types contribute to myocardial repair post-MI.
  • To systematically evaluate the translational potential and clinical efficacy of cell-based therapeutic strategies for MI.
  • To provide a scientific basis for advancing cardiac regenerative medicine.

Main Methods:

  • Comprehensive review of recent research on cell-based repair following myocardial infarction.
  • Analysis of the roles of both in situ-resident and non-resident cardiac cells.
  • Assessment of studies focusing on non-cardiac stem cells and explant-derived cardiac cells.

Main Results:

  • Identified multiple repair mechanisms including cell proliferation, differentiation, angiogenesis, paracrine signaling, immune modulation, and fibrosis regulation.
  • Highlighted the contribution of both endogenous and exogenous cell populations to cardiac repair.
  • Revealed the necessity for age-specific therapeutic strategies in cell-based treatments.

Conclusions:

  • Cell-based approaches offer significant potential for treating myocardial infarction.
  • Further research into specific cell types and their mechanisms is warranted.
  • This review lays the groundwork for future clinical trials in cardiac regenerative medicine.