Fig. 6. The VEGF, IL-6, bFGF, MMP9, CCL5 and SDF-1αlevels in different treatment media by ELISA.

a The VEGF (n ≥ 3) levels were significantly higher in CD90^low CM compared to those in CD90^high CM and 0%DMEM. b The bFGF (n ≥ 3) levels were significantly higher in CD90^low CM compared to those in CD90^high CM and 0%DMEM. c The IL-6 (n ≥ 3) levels were significantly higher in CD90^low CM compared to those in CD90^high CM and 0%DMEM. * d The SDF-1α (n ≥ 3) levels were higher in CD90^high CM compared to those in CD90^low CM and 0%DMEM. e The CCL5 (n ≥ 3) levels were higher in CD90^high CM compared to those in CD90^low CM and 0%DMEM. f The MMP9 (n ≥ 3) levels were significantly higher in CD90^high CM compared to those in CD90^low CM and 0%DMEM. P < 0.05, **P < 0.01, ***P < 0.001 and ****P < 0.0001