Fig. 4
Time-response study of protein expression of IL-1β, NLRP3, and TLR2 in MH-S cells exposed to PM2.5. The cells were treated with 50 μg/mL of PM2.5 for 3, 6, and 12 h. The cells treated with physiological saline were used as control. a is the Western blot result of a single experiment while b is the normalized results of Western blots. Data are shown as mean ± SEM (n = 3). * p < 0.05 vs. control