Increased cell proliferation was found in IL-6-treated TDSCs. (A) CCK8 assay was done to detect cell viability in TDSCs treated with various concentrations (0, 0.1, 1, 10, and 100 ng/mL) of IL-6 for 1, 3, and 5 days, respectively. (B) Manual cell count was performed to detect cell viability in TDSCs treated with various concentrations (0, 0.1, 1, 10, and 100 ng/mL) of IL-6 for 1, 3, and 5 days, respectively. (C, D) Cell cycle was detected in TDSCs with or without 10 ng/mL IL-6 treatment for 3 days. Values are average and SD for 3 samples. * P<0.05; ** P<0.01.