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- W2010043668 abstract "Embryonic stem cell-derived cardiomyocytes (ESC-CMs) have applications in understanding cardiac disease pathophysiology, pharmacology, and toxicology. Comprehensive characterization of their basic physiological and pharmacological properties is critical in determining the suitability of ESC-CMs as models of cardiac activity. In this study we use video microscopy and quantitative PCR to investigate the responses of mouse ESC-CMs to adrenoceptor, muscarinic, angiotensin II (Ang II), and endothelin-1 (ET-1) receptor activation. Isoprenaline (10 nM–10 μM) increased beating rate and contraction amplitude in all beating bodies (BBs), whereas carbachol (up to 1 μM) and the If channel blocker ZD-7288 (10 μM) decreased contraction frequency. ET-1 (0.01–100 nM) reduced contraction amplitude in all BBs and increased contraction frequency in 50% of BBs; these effects were blocked by the ETA receptor antagonist BQ123 (250 nM). Ang II (0.01 nM–1 μM) increased both contraction amplitude (all BBs) and frequency (in 50% of BBs), effects blocked, respectively, by losartan (100 nM) and PD123,319 (200 nM). These results indicate the presence of functional ETA and both AT1 and AT2 receptors in murine ESC-CMs, but their expression and or activity appears to be evident only in a limited set of BBs." @default.
- W2010043668 created "2016-06-24" @default.
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- W2010043668 date "2011-01-01" @default.
- W2010043668 modified "2023-09-30" @default.
- W2010043668 title "Endothelin-1 and angiotensin II modulate rate and contraction amplitude in a subpopulation of mouse embryonic stem cell-derived cardiomyocyte-containing bodies" @default.
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- W2010043668 doi "https://doi.org/10.1016/j.scr.2010.09.001" @default.
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