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. 2017 Oct 23;7:13821. doi: 10.1038/s41598-017-14198-y

Figure 1.

Figure 1

Characterization of cardiomyocytes differentiated from H9 hESCs. (a) Bright field images of H9 cells at day 0 (left panel) and differentiating cells at day 30 (right panel). Scale bar = 100 μm (b) Differentiated cardiomyocytes (hESC-CMs) at day 30 were subjected to immunofluorescent staining with antibodies against α-SA (red), cTnT (green), or MLC2a (yellow). Nuclei were stained with DAPI, and the merged images are shown. Scale bar = 20 μm. (c) Protein expression in undifferentiated H9 cells, hESC-CMs, and adult human left ventricular tissue (adult hLV) was assessed by Western blot analysis with antibodies against pluripotency markers (OCT4 and NANOG) and cardiomyocyte markers (α-SA, cTnT, MLC2a, MLC2v, SERCA2a and Cx43). (d) The mRNA levels of α-MHC and β-MHC in hESC-CMs and adult hLV were accessed by quantitative RT-PCR and the ratio of β-MHC/α-MHC mRNA levels was determined (n = 3). *P < 0.05. (e) Gene expression in hESC-CMs at day 30 and hESCs was accessed by quantitative RT-PCR with cardiomyocyte markers (GATA4, GATA6, and cTnT) and pluripotency markers (OCT4 and NANOG) n = 3. *P < 0.05. (f) Flow cytometry analysis of hESC-CMs at day 30 with antibodies against cardiomyocyte markers (cTnT, MLC2a, and α-SA) and pluripotency markers (TRA-1-60 and SSEA3) is shown.