Analysis of peritoneal fluid concentrations of cytokines and tPA. The concentrations of IL-1β (A), IL-6 (B), TNF-α (C), TGF-β1 (D), IFN-γ (E), and tPA (F) for all groups were measured by enzyme-linked immunosorbent assays. The data are shown as mean ± standard deviation (SD). *P < .05 and **P < .01 compared with saline-treated vehicle at each time point. NS, nonsignificant.