RESUMO
Objective To investigate the effect of erythropoietin(EPO)on the proliferation of neural stem cells(NSCs)derived from central canal of adult rat spinal cord in vitro ,so as to provide a theoretical basis for clinical treatment of spinal cord injury by autotransplanting or allograft transplanting of adult spinal cord NSCs. Method NSCs were isolated from the central canal of the adult rats spinal cord by microsurgical method,and Nestin(nestin)and Sox2 immunofluorescence stain were used to identify the cells. After cells were treated with different dose of EPO,5,10,20 and 40 U/mL,respectively,the optical treatment concentration and time were determined by CCK8 assay. The effect of EPO on the cell count and the expression of Cyclin D1 in NSCs were detected at the treatment time 96 h. Result The NSCs derived from the central canal of adult SD rats spinal cord could stably express protein Nestin and transcription factor Sox2. As the results of CCK8 test,cell counts and real-time quantitative PCR showed the optimal treatment of concentration and time maybe 20 U/mL and 96 h. Conclusions This study shows that EPO can promote the proliferation of NSCs derived from central canal of adult rat spinal cord,and the optimal treatment of concentration and time for proliferation might be 20 U/mL and 96 h.