SummaryAim: Various methods are used to augment the efficacy of cell therapy in myocardial infarction (MI). In this study, we used the "activated platelet supernatant (APS)" to prime autologous "granulocyte colony-stimulating factor-mobilized peripheral blood mononuclear cells ( mob PBMCs)" and investigated the efficacy of cell-based therapy in MI.
Method:Rat mob PBMCs were isolated after daily subcutaneous injections of G-CSF at 100 μg/kg for 3 days. APS was isolated separately after activating rat platelets with thrombin 0.5 U/mL for 2 hours. Priming was performed with APS for 6 hours.To check the paracrine effect of primed mob PBMCs, we used the 36-hour culture supernatant of the primed cells. A rat MI model was used for an in vivo model. PBMCs showed a 1.6-fold augmented proliferation and capillary network formation.
ResultIn vivo transplantation of APS-primed mob PBMCs into rat MI models showed a significant trend of reduction in fibrosis area (P=.001) and wall thinning (P=.030), which lead to improvement in cardiac function measured by echocardiography.
Conclusion:Our data reveal that APS priming can enhance the wound-healing potential of mob PBMCs. APS priming may be a promising method for cell-based therapy of MI.
K E Y W O R D SActivated platelet supernatant, Cell priming, Cell Therapy, Granulocyte colony-stimulating factor-mobilized peripheral blood mononuclear cells, M2 polarization, Myocardial infarction