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- W2467359543 abstract "Junctophilin2 (JP2) is a critical protein associated with cardiogenesis. Icariin (ICA) facilitated the directional differentiation of murine embryonic stem (ES) cells into cardiomyocytes. However, little is known about the effects of ICA on JP2 during cardiac differentiation. Here, we explored whether ICA has effects on the expression and Ca2+ related function of JP2 during cardiomyocyte differentiation of ES cells in vitro. Embryonid bodies (EBs) formed by hanging drop were treated with 10(-7) mol/L ICA from day 5 to promote the cardiac differentiation. Percentage of beating EBs and number of beating area within EBs were monitored. Cardiomyocytes were purified by discontinuous percoll gradient centrifugation from EBs. The expression of JP2, α-actinin and troponin-T within EBs or isolated cardiomyocytes were analyzed by immunocytochemistry, western blot and flow cytometry. The transient Ca2+ release was characterized in cardiomyocytes treated with/without 10 mmol/L caffeine and 8 mmol/L Ca2+. Our results showed that ES cell-derived cardiomyocytes were well characterized with JP2 proteins. ICA promoted cardiomyocyte differentiation as indicated by an increased percentage of beating EBs and number of beating area within EBs. The expression of JP2, α-actinin and troponin-T were up-regulated both in EBs and isolated cardiomyocytes from EBs. Furthermore, ICA-induced JP2 expression was accompanied by a remarkable increase of the amplitude of Ca2+ transients in cardiomyocytes before/after caffeine and Ca2+ stimulating. In conclusion, ICA promotes in cardiac differentiation partly through regulating JP2 and improved the Ca2+ modulatory function of cardiomyocytes." @default.
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- W2467359543 date "2015-12-01" @default.
- W2467359543 modified "2023-09-23" @default.
- W2467359543 title "Icariin promotes expression of junctophilin 2 and Ca2+ related function during cardiomyocyte differentiation of murine embryonic stem cells." @default.
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