Ischemic preconditioning potentiates the protective effect of stem cells through secretion of exosomes by targeting Mecp2 via miR-22
Yuliang Feng, Wei Huang, Mashhood Wani, Xiyong Yu, Muhammad Ashraf, Yuliang Feng, Wei Huang, Mashhood Wani, Xiyong Yu, Muhammad Ashraf
Abstract
Mesenchymal stem cells (MSCs) have potential application for the treatment of ischemic heart diseases. Besides differentiation properties, MSCs protect ischemic cardiomyocytes by secretion of paracrine factors. In this study, we found exosomes enriched with miR-22 were secreted by MSCs following ischemic preconditioning (Exo(IPC)) and mobilized to cardiomyocytes where they reduced their apoptosis due to ischemia. Interestingly, by time-lapse imaging, we for the first time captured the dynamic shedding of miR-22 loaded exosomes from cytosol to extracellular space. Furthermore, the anti-apoptotic effect of miR-22 was mediated by direct targeting of methyl CpG binding protein 2 (Mecp2). In vivo data showed that delivery of Exo(IPC) significantly reduced cardiac fibrosis. Our data identified a significant benefit of Exo(IPC) for the treatment of cardiac diseases by targeting Mecp2 via miR-22.
Conflict of interest statement
Competing Interests: The authors have declared that no competing interests exist.
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References
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Source: PubMed