A strong regenerative ability of cardiac stem cells derived from neonatal hearts

David L. Simpson, Rachana Mishra, Sudhish Sharma, Saik Kia Goh, Savitha Deshmukh, Sunjay Kaushal

Research output: Contribution to journalArticle

95 Scopus citations

Abstract

Background-Human cardiac stem cells (CSCs) promote myocardial regeneration in adult ischemic myocardium. The regenerative capacity of CSCs in very young patients with nonischemic congenital heart defects has not been explored. We hypothesized that isolated neonatal-derived CSCs may have a higher regenerative ability than adult-derived CSCs and might address the structural deficiencies of congenital heart disease. Methods and Results-Human specimens were obtained during routine cardiac surgical procedures from right atrial appendage tissue discarded from 2 age groups: neonates and adults patients. We developed a reproducible isolation method that generated cardiosphere-derived cells (CDCs), regardless of starting tissue weight or age. Neonatal-derived CDCs demonstrated increased number of cardiac progenitor cells expressing c-kit+, flk-1, and Islet-1 by flow cytometry and immunofluorescence. When transplanted into infarcted myocardium, neonatal-derived CDCs had a significantly higher ability to preserve myocardial function, prevent adverse remodeling, and enhance blood vessel preservation and/or formation when compared with adult-derived CDCs. Last, neonatal-derived CDCs were more cardiomyogenic than adult-derived CDCs when cocultured with neonatal cardiomyocytes and displayed enhanced angiogenic function compared with adult-derived CDCs. Conclusions-Neonatal- derived CDCs have a strong regenerative ability when compared with adult-derived CDCs that may depend on angiogenic cytokines and an increase prevalence of stem cells. This has important implications in the potential use of CDCs in future clinical trials.

Original languageEnglish (US)
JournalCirculation
Volume126
Issue number11 SUPPL.1
DOIs
StatePublished - Sep 11 2012
Externally publishedYes

Keywords

  • cardiac stem cells
  • cell therapy
  • myocardial infarction
  • neovascularization
  • paracrine effect
  • stem cell differentiation

ASJC Scopus subject areas

  • Physiology (medical)
  • Cardiology and Cardiovascular Medicine

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