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Article Abstract
Aim: Accumulating evidence showed that transient receptor potential channels play an important role in the regulation of cardiomyocyte differentiation. The vanilloid receptor 1 (VR1) is a member of the transient receptor channel super family and is expressed in cardiomyocytes. However, its function in cardiomyocytes remains unclear.
Methods: Herein, the aim of this study was to investigate the functional role of VR1 in the cardiomyocyte differentiation of bone marrow-derived mesenchymal stem cells (BMSCs) and to elucidate the potential molecular mechanisms.
Results: Immunofluorescence assay showed that cardiomyocyte marker cardiac troponin T (cTnT) was found significantly elevated in differentiated BMSCs induced by 5-azacytidine compared with control. Similarly, VR1 expression was also found significantly increased in induced BMSCs differentiation. Additionally, we examined the role of VR1 in BMSC differentiation processes through VR1 siRNAs. We found that the expression of cardiomyocyte marker genes, such as alpha-myosin heavy chain (α-MHC), α-cardiac actin, and Nkx2.5 (cardiac-specific transcription factor), was significantly decreased when VR1 was silenced. Furthermore, we found that inhibition of VR1 expression is associated with downregulation of Wnt/β-catenin signaling.
Conclusions: To summarize, our data demonstrate important role of VR1 in BMSCs differentiation into cardiomyocytes in conjunction of Wnt/β-catenin signaling.
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| http://dx.doi.org/10.1111/1755-5922.12228 | DOI Listing |
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