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- W3119542800 abstract "Epigenetic reprogramming and autophagy have critical roles in differentiation of stem cells. However, very little is known about how epigenetic modifications are mediated and how they contribute to autophagy and differentiation in human cardiac stem cells (hCSCs). Previously, we have reported that intracellular matrix metalloproteinase-9 (MMP9), a collagenase, mediates cell death in hCSCs. Here, we investigated whether intracellular MMP9 mediates epigenetic modifications and autophagy in hCSCs. We created MMP9KO hCSCs and treated them with 5-azacytidine, an inhibitor of DNA methylation, and bafilomycin A1, an inhibitor of autophagosome degradation, and evaluated epigenetic modifications, autophagic flux, and differentiation. Our results showed compromised epigenetic modifications, reduced autophagy, and impaired differentiation in MMP9KO hCSCs. Remarkably, paracrine MMP9 supplementation restored epigenetic modifications but further reduced autophagy in MMP9KO hCSCs. We conclude that intracellular MMP9 is a critical mediator of epigenetic modifications and autophagy in hCSCs. Furthermore, the endocrine and paracrine effects of MMP9 vary for regulating autophagy in hCSCs. These novel roles of MMP9 are valuable for stem cell therapy." @default.
- W3119542800 created "2021-01-18" @default.
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- W3119542800 date "2021-01-12" @default.
- W3119542800 modified "2023-10-12" @default.
- W3119542800 title "Intracellular matrix metalloproteinase-9 mediates epigenetic modifications and autophagy to regulate differentiation in human cardiac stem cells" @default.
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- W3119542800 doi "https://doi.org/10.1002/stem.3330" @default.
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