Figure 6

The effect of smoking cessation on smoke-induced changes in cytokine and chemokine levels in BALF. Levels of the pro-inflammatory cytokine IL-12 (A), the regulatory cytokine IL-10 (B) and the growth factor VEGF (C) in the BALF of air-exposed mice (white bars), smoke-exposed mice (black bars), smoke-exposed mice 8 weeks after smoking cessation (grey bars). n = 4-5 animals per group. Values are expressed as mean +/- S.E.M. *P ≤ 0.05, **P ≤ 0.01, ***P ≤ 0.001; significantly different from the control group. ^P ≤ 0.05, ^^P ≤ 0.01; significantly different from the smoke group.