Fig. 1.
PM2.5 aspiration increases IL-1β and TNF-α levels in the (a) lung, (b) blood and (c) hippocampus. The data are expressed as the means ± SE (n = 6 mice/group). *P < 0.05 and **P < 0.01. Low = 1 mg/kg PM2.5; High = 5 mg/kg PM2.5
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