Fig. 7From: Exosomes as potential alternatives to stem cell therapy for intervertebral disc degeneration: in-vitro study on exosomes in interaction of nucleus pulposus cells and bone marrow mesenchymal stem cellsNPC proliferation rate increased with the time for which NPCs were stimulated by BM-MSC exosomes. The group of day 12 has the greatest relative proliferation rate (49% compared with control). The day 6, day 9 and day 12 groups had significant difference from the control group (*P < 0.05, ***P < 0.001). The day 3 group had no significant statistical difference (P > 0.05). Results shown as the relative proliferation rate to the control groupBack to article page