Transplantation of marrow-derived cardiac stem cells carried in designer self-assembling peptide nanofibers improves cardiac function after myocardial infarction

Biochemical and Biophysical Research Communications
Hai-dong GuoYu-zhen Tan

Abstract

Progress in stem cell transplantation for the treatment of myocardial infarction is hampered by the poor retention and survival of the implanted cells. To enhance cell survival and differentiation and thereby improve the efficiency of stem cell therapy, we constructed a novel self-assembling peptide by attaching an RGDSP cell-adhesion motif to the self-assembling peptide RADA16. c-kit(pos)/Nkx2.5(low)/GATA4(low) marrow-derived cardiac stem cells (MCSCs), which have a specific potential to differentiate into cardiomyocytes, were isolated from rat bone marrow. The cytoprotective effects of RGDSP scaffolds were assessed by exposure of MCSCs to anoxia in vitro. The efficacy of transplanting MCSCs in RGDSP scaffolds was evaluated in a female rat MI model. The designer self-assembling peptide self-assembled into RGDSP nanofiber scaffolds under physiological conditions. RGDSP scaffolds were beneficial for the growth of MCSCs and protected them from apoptosis and necrosis caused by anoxia. In a rat MI model, cardiac function was improved and collagen deposition was markedly reduced in the group receiving MCSCs in RGDSP scaffolds compared with groups receiving MCSCs alone, RGDSP scaffolds alone or MCSCs in RADA16 scaffolds. There were m...Continue Reading

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