Fig. 1.
PM2.5 reversibly elevates heart rate and systolic blood pressure of mice. (a, c) Heart rate and (b, d) systolic blood pressure of mice exposed to PM2.5 (3 mg/kg b.w.).The data are expressed as the mean ± SE (n = 7). *, P < 0.05 vs. age-matched control; &, P < 0.05 vs. 4-week-old PM2.5 group; #, P < 0.05 vs. 4-month-old PM2.5 group; a, P < 0.05 vs. pre-exposure; b, P < 0.05 vs. 2-week-exposure; c, P < 0.05 vs. 3-week-exposure; d, P < 0.05 vs. 4-week-exposure; e, P < 0.05 vs. 1-week-restored group by two-way ANOVA and Turkey’s post hoc tests