Figure 4

Cytokine expression. Levels of IL-1β and IL-2 in the serum of C57BL/6 or Tlr4^-/- mice at 3 and 6 h after intraperitoneal injection of 500 μg LPS in the absence or presence of LY294002 injection 1 h prior. CTL: control. Bars represent mean ± SEM values of 6 experiments; *P < 0.05, **P < 0.01 vs. control.