期刊
ANNALS OF MEDICINE
卷 41, 期 5, 页码 360-U17出版社
TAYLOR & FRANCIS LTD
DOI: 10.1080/07853890802609542
关键词
Cardiac; differentiation; gene expression; human embryonic stem cells
资金
- Academy of Finland
- Finnish Heart Research Foundation
- Finnish Cultural Foundation
- Competitive Research Funding of Pirkanmaa Hospital District
- Kalle Kaihari Foundation
- Ida Montin Foundation
- BioneXt Tampere
Aim. The differentiation efficiencies of human embryonic stem cell (hESC) lines differ from each other. To assess this in more detail we studied the cardiac differentiation of eight hESC lines derived in the same laboratory. Results. Substantial variation in growth and in the ability to form beating areas was seen between the different hESC lines; line HS346 gave the best efficiency (9.4%), while HS293 did not differentiate into beating colonies at all. Nine germ layer and differentiation markers were quantified during early differentiation in four hESC lines. The expression levels of Brachyury T, MESP1 and NKX2.5 were highest in the most efficient cardiac line (HS346). A systematic characterization of the beating cells revealed proper cardiac marker expression, electrophysiological activity, and pharmacological response. Conclusions. The hESC lines derived in the same laboratory varied considerably in their potential to differentiate into beating cardiomyocytes. None of the expression markers could clearly predict cardiac differentiation potential, although the expression of early cardiomyogenic genes was upregulated in the best cardiac line. The proper cardiomyocyte characteristics and pharmacological response indicate that these cells could be used as a model for human cardiomyocytes in pharmacological and toxicological analyses when investigating new heart medications or cardiac side-effects.
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