Fig. 2

Podocytes viability following PM2.5 or triptolide treatment were assessed by CCK-8 assay. a Podocytes were treated with PM2.5 at 0, 25, 50, 100, 200 or 400 mg/L for 24 h. b Podocytes were treated with 200 mg/L PM2.5 for 0, 3, 6, 12, 24 or 48 h. c Podocytes were treated with triptolide at 0, 0.5, 1, 2, 4, 8 mg/L for 24 h. d Podocytes were pre-treated with triptolide at 0, 1, 2, 4 mg/L for 1 h and followed by the addition of 200 mg/L PM2.5 for 24 h. Data are expressed as mean ± SEM. n = 3. ^*P < 0.05, ^**P < 0.01 versus untreated cells; ^#P < 0.05, ^##P < 0.01 versus 200 mg/L PM2.5 group