Cellular heterogeneity of pluripotent stem cell-derived cardiomyocyte grafts is mechanistically linked to treatable arrhythmias

Nat Cardiovasc Res. 2024 Feb;3(2):145-165. doi: 10.1038/s44161-023-00419-3. Epub 2024 Feb 6.

Abstract

Preclinical data have confirmed that human pluripotent stem cell-derived cardiomyocytes (PSC-CMs) can remuscularize the injured or diseased heart, with several clinical trials now in planning or recruitment stages. However, because ventricular arrhythmias represent a complication following engraftment of intramyocardially injected PSC-CMs, it is necessary to provide treatment strategies to control or prevent engraftment arrhythmias (EAs). Here, we show in a porcine model of myocardial infarction and PSC-CM transplantation that EAs are mechanistically linked to cellular heterogeneity in the input PSC-CM and resultant graft. Specifically, we identify atrial and pacemaker-like cardiomyocytes as culprit arrhythmogenic subpopulations. Two unique surface marker signatures, signal regulatory protein α (SIRPA)+CD90-CD200+ and SIRPA+CD90-CD200-, identify arrhythmogenic and non-arrhythmogenic cardiomyocytes, respectively. Our data suggest that modifications to current PSC-CM-production and/or PSC-CM-selection protocols could potentially prevent EAs. We further show that pharmacologic and interventional anti-arrhythmic strategies can control and potentially abolish these arrhythmias.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Action Potentials / drug effects
  • Action Potentials / physiology
  • Animals
  • Anti-Arrhythmia Agents / pharmacology
  • Anti-Arrhythmia Agents / therapeutic use
  • Arrhythmias, Cardiac* / therapy
  • Biomarkers / metabolism
  • Cell Differentiation
  • Cells, Cultured
  • Disease Models, Animal
  • Heart Rate / physiology
  • Humans
  • Induced Pluripotent Stem Cells / transplantation
  • Myocardial Infarction / therapy
  • Myocytes, Cardiac* / metabolism
  • Myocytes, Cardiac* / transplantation
  • Phenotype
  • Pluripotent Stem Cells / transplantation
  • Stem Cell Transplantation / methods
  • Swine

Substances

  • Biomarkers
  • Anti-Arrhythmia Agents