Abstract
Acute myocardial infarction (MI) is a common cardiovascular disease with high mortality. In this study, an injectable thermosensitive hydrogel of chitosan (CS)/dextran (DEX)/β–glycerophosphate (β-GP) loaded with umbilical cord mesenchymal stem cells (UCMSCs) was prepared for MI treatment. The good biocompatibility of hydrogels was confirmed by 3T3 cells and HUVECs culture study in vitro. HUVECs encapsulated in the hydrogels showed a cell delivery ability. Furthermore, the results indicated that hydrogel could encapsulate most of UCMSCs and the cells exhibited good viability in CS/ 1.0DEX/β-GP hydrogels. The expression of cardiac markers of cTnI and Cx43 and signaling pathways of p-Akt and p-ERK1/2 were studied, and it showed that UCMSCs differentiate towards myocardium and has a great potential for therapeutic use of cardiac repair. In conclusion, the thermosensitive hydrogel of CS/1.0 DEX/β-GP loaded UCMSCs was a promising candidate as cell delivery vehicle for cardiac repair to reconstitute damaged myocardium.
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