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Isolation of Perivascular Multipotent Precursor Cell Populations from Human Cardiac Tissue
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Cardiac commitment driven by MyoD expression in pericardial stem cells.

Jianfeng Zhao1, Limei Rui1, Weili Ouyang1

  • 1Department of Cardiology, The People's Hospital of Danyang Affiliated to Nantong University, Danyang, China.

Frontiers in Cell and Developmental Biology
|April 11, 2024
PubMed
Summary
This summary is machine-generated.

Pericardial stem cells (pSCs) from infarcted rat hearts commit to cardiac cells, expressing cardiac markers and contracting rhythmically. These cells successfully engraft in damaged rat hearts, offering a promising source for cardiac repair therapies.

Keywords:
MyoDmyocardial infarctionmyogenic commitmentmyogenic progenitorspericardiumstem cell therapy

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Area of Science:

  • Regenerative Medicine
  • Stem Cell Biology
  • Cardiovascular Research

Background:

  • Cellular therapy for myocardial repair faces challenges due to limited sources of suitable cardiac cells.
  • Stable engraftment of transplanted cells in the recipient heart remains a significant hurdle.

Purpose of the Study:

  • To identify and characterize novel stem cell populations for cardiac regeneration.
  • To investigate the potential of pericardial stem cells (pSCs) for myocardial repair after infarction.

Main Methods:

  • Isolation and activation of pSCs from infarcted rat hearts (MI-pSCs).
  • Assessment of cardiac commitment using gene expression (Tnnt2) and functional assays (rhythmic contraction).
  • Bulk RNA-sequencing to analyze gene expression profiles of activated pSCs.
  • Investigating the role of MyoD in cardiac commitment via siRNA-mediated gene silencing.
  • Evaluating the in vivo engraftment and survival of cardiac-committed pSCs in infarcted rat hearts.

Main Results:

  • MI-pSCs exhibited robust in vitro and in vivo cardiac commitment.
  • Activated pSCs showed upregulated genes involved in cardiac differentiation, paracrine signaling, and extracellular matrix remodeling.
  • MyoD was identified as a critical regulator of pSC cardiac commitment.
  • Transplanted cardiac-committed pSCs demonstrated long-term survival and stable engraftment in the infarcted myocardium.

Conclusions:

  • Pericardial tissue harbors myogenic stem cells (pSCs) that can be activated and committed to a cardiac lineage following myocardial infarction.
  • MyoD plays a crucial role in mediating the cardiac differentiation of pSCs.
  • Cardiac-committed pSCs represent a promising and accessible cell source for myocardial regeneration and cardiac cell-based therapies.