Cardiac myocyte force development during differentiation and maturation

Jeffrey G. Jacot, Hiroko Kita-Matsuo, Karen A. Wei, H. S. Vincent Chen, Jeffrey H. Omens, Mark Mercola, Andrew D. McCulloch

Research output: Chapter in Book/Report/Conference proceedingConference contribution

91 Citations (Scopus)


The maturation of cardiac myocytes during the immediate prenatal period coincides with changes in the mechanical properties of the extracellular matrix. We investigated the effects of extracellular stiffness on cardiomyocyte maturation in neonatal rat ventricular myocytes grown on collagen-coated gels. Cells on 10-kPa substrates developed aligned sarcomeres, while cells on stiffer substrates had unaligned sarcomeres and stress fibers. Cells generated greater mechanical force on gels with stiffness similar to that of the native myocardium than on stiffer or softer substrates. To investigate the differentiation of myocyte progenitors, we used clonal expansion of engineered human embryonic stem cells. Puromycin-selected cardiomyocytes exhibited a gene expression profile similar to that of adult human cardiomyocytes and generated force and action potentials consistent with normal fetal cardiomyocytes. These results suggest that extracellular stiffness significantly affects maturation and differentiation of immature ventricular myocytes.

Original languageEnglish
Title of host publicationAnalysis of Cardiac Development
Subtitle of host publicationFrom Embryo to Old Age
PublisherBlackwell Publishing Inc.
Number of pages7
ISBN (Print)9781573317474
Publication statusPublished - Feb 2010
Externally publishedYes

Publication series

NameAnnals of the New York Academy of Sciences
ISSN (Print)0077-8923
ISSN (Electronic)1749-6632

All Science Journal Classification (ASJC) codes

  • General Neuroscience
  • General Biochemistry,Genetics and Molecular Biology
  • History and Philosophy of Science


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