Fig. 7

P-PRP induces less inflammatory responses than L-PRP. P-PRP and L-PRP both decreased the inflammatory gene expression of IL-1β and TNF-α (a-d). The inflammatory gene expression was significantly lower in P-PRP group. Moreover, the level of inflammatory cytokines (IL-1β, TNF-α) in the cell supernatants was consistent with the above gene expression data (e-f). Asterisks represent significant differences when compared with the respective control, and the pound symbols indicate significant differences between L-PRP and P-PRP (P < 0.05). IL interleukin, L-PRP leukocyte-platelet-rich plasma, P-PRP pure platelet-rich plasma, TNF tumor necrosis factor