Journal
STEM CELL RESEARCH
Volume 1, Issue 2, Pages 138-149Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.scr.2008.02.003
Keywords
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Funding
- Netherlands Organization for Scientific Research [016.056.319, 916.36.012]
- Netherlands Heart Foundation [2003B07304]
- European Union [LSHB-CT-2004-502988]
- Van Ruyven Foundation
- BSIK program Dutch Program for Tissue Engineering, [MKG5942, UGT.6746]
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The adult mammalian heart has limited regenerative capacity and was generally considered to contain no dividing cells. Recently, however, a resident population of progenitor cells has been identified, which could represent a new source of cardiomyocytes. Here, we describe the efficient isolation and propagation of human cardiomyocyte progenitor cells (hCMPCs) from fetal heart and patient biopsies. Establishment of hCMPC cultures was remarkably reproducible, with over 70% of adult atrial biopsies resulting in robustly expanding cell populations. Following the addition of transforming growth factor beta, almost all cells differentiated into spontaneously beating myocytes with characteristic cross striations. hCMPC-derived cardiomyocytes showed gap-junctional communication and action potentials of maturing cardiomyocytes. These are the first cells isolated from human heart that proliferate and form functional cardiomyocytes without requiring coculture with neonatal myocytes. Their scalability and homogeneity are unique and provide an excellent basis for developing physiological, pharmacological, and toxicological assays on human heart cells in vitro. (C) 2008 Elsevier B.V. All rights reserved.
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