Publication details

Forced aggregation and defined factors allow highly uniform-sized embryoid bodies and functional cardiomyocytes from human embryonic and induced pluripotent stem cells

Authors

PEŠL Martin AĆIMOVIĆ Ivana PŘIBYL Jan HÉŽOVÁ Renata VILOTIĆ Aleksandra FAUCONNIER Jeremy VRBSKÝ Jan KRUZLIAK Peter SKLÁDAL Petr KÁRA Tomáš ROTREKL Vladimír LACAMPAGNE Alain DVOŘÁK Petr MELI Albano

Year of publication 2014
Type Article in Periodical
Magazine / Source Heart Vessels
MU Faculty or unit

Faculty of Medicine

Citation
Web http://link.springer.com/article/10.1007/s00380-013-0436-9#
Doi http://dx.doi.org/10.1007/s00380-013-0436-9
Field Genetics and molecular biology
Keywords human pluripotent stem cell embryoid body differentiation cardiomyocyte calcium
Attached files
Description In vitro human embryonic stem cells (hESCs) and human induced pluripotent stem cells (hiPSCs) can differentiate into functional cardiomyocytes (CMs). Protocols for cardiac differentiation of hESCs and hiPSCs include formation of the three-dimensional cell aggregates called embryoid bodies (EBs). The traditional suspension method for EB formation from clumps of cells results in an EB population heterogeneous in size and shape. In this study we show that forced aggregation of a defined number of single cells on AggreWell plates gives a high number of homogeneous EBs that can be efficiently differentiated into functional CMs by application of defined growth factors in the media. For cardiac differentiation, we used three hESC lines and one hiPSC line. Our contracting EBs and the resulting CMs express cardiac markers, namely myosin heavy chain alpha and beta, cardiac ryanodine receptor/calcium release channel, and cardiac troponin T, shown by real-time polymerase chain reaction and immunocytochemistry. Using Ca2+ imaging and atomic force microscopy, we demonstrate the functionality of RyR2 to release Ca2+ from the sarcoplasmic reticulum as well as reliability in contractile and beating properties of hESC-EBs and hiPSC-EBs upon the stimulation or inhibition of the beta-adrenergic pathway.
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