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Huang, Chen Yu; Peres Moreno Maia-Joca, Rebeca; Ong, Chin Siang; Wilson, Ijala; DiSilvestre, Deborah; Tomaselli, Gordon F.; Reich, Daniel H.
Journal of molecular and cellular cardiology, January 2020, 2020-01-00, 20200101, Volume: 138Journal Article
Recent advances in the understanding and use of pluripotent stem cells have produced major changes in approaches to the diagnosis and treatment of human disease. An obstacle to the use of human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) for regenerative medicine, disease modeling and drug discovery is their immature state relative to adult myocardium. We show the effects of a combination of biochemical factors, thyroid hormone, dexamethasone, and insulin-like growth factor-1 (TDI) on the maturation of hiPSC-CMs in 3D cardiac microtissues (CMTs) that recapitulate aspects of the native myocardium. Based on a comparison of the gene expression profiles and the structural, ultrastructural, and electrophysiological properties of hiPSC-CMs in monolayers and CMTs, and measurements of the mechanical and pharmacological properties of CMTs, we find that TDI treatment in a 3D tissue context yields a higher fidelity adult cardiac phenotype, including sarcoplasmic reticulum function and contractile properties consistent with promotion of the maturation of hiPSC derived cardiomyocytes. •3D microtissues used to probe biochemical maturation of hiPSC-cardiomyocytes (CMs).•Thyroid hormone, dexamethasone, and IGF-1 (TDI) improve CM maturation in 3D.•Gene expression and ultrastructure show improved adult cardiac phenotype.•Enhanced electrophysiological properties, contraction and ionotropic response
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