Figure 1

Pro-inflammatory cytokine levels. A. Levels of TNF-α in different regions of the rat brain after exposure to filtered air (Control) or DEE (Diesel-exposed). Values given as mean ± SE; n = 5; *p < 0.05 compared to control. OB+T = olfactory bulb and the tubercles. B. Levels of IL-1α in different regions of the rat brain after exposure to purified air (Control) or DEE (Diesel-exposed). Values given as mean ± SE; n = 5; *p < 0.05 compared to control. OB+T = olfactory bulb and the tubercles.