Repair of bone defects with prefabricated vascularized bone grafts and double-labeled bone marrow-derived mesenchymal stem cells in a rat model.

ABSTRACT: This study aims to investigate the repair of bone defects with prefabricated vascularized bone grafts and double-labeled bone marrow-derived mesenchymal stem cells (BMSCs) in a rat model. BMSCs were separated from rat bone marrow. LTR-CMVpro-RFP and LTR-CMVpro-GFP were transfected into the BMSCs for in vitro and in vivo tracking. BMSCs-RFP and BMSCs-GFP were induced into endothelial progenitor cells (EPCs) and osteoblasts (OBs). Rats were divided into five groups: Group A: in vitro prefabrication with EPCs-RFP?+?in vivo prefabrication with arteriovenous vascular bundle?+?secondary OBs-GFP implantation; Group B: in vitro prefabrication with EPCs-RFP?+?secondary OBs-GFP implantation; Group C: in vivo prefabrication with arteriovenous vascular bundle?+?secondary OBs-GFP implantation; Group D: implantation of EPCs-RFP?+?implantation of with arteriovenous vascular bundle?+?simultaneous OBs-GFP implantation; Group E: demineralized bone matrix (DBM) grafts (blank control). Among five groups, Group A had the fastest bone regeneration and repair, and the regenerated bone highly resembled normal bone tissues; Group D also had fast bone repair, but the repair was slightly slower than Group A. Therefore, in vitro prefabrication with EPCs-RFP plus in vivo prefabrication with arteriovenous vascular bundle and secondary OBs-GFP implantation could be the best treatment for bone defect.

SUBMITTER: Jiang XR 

PROVIDER: S-EPMC5288698 | biostudies-other | 2017 Feb

REPOSITORIES: biostudies-other