Fig. 7

PRP treatment can affect the levels of cytokines secreted by macrophages. The expression levels of TNF-α (A), IL-1β (B), IL-10 (C) and NGF (D) were determined via ELISA. The data are presented as the means ± SEMs from three independent experiments. **p < 0.01, ***p < 0.001, ****p < 0.0001.