Fig. 1From: Activation of the Nrf2/HO-1 pathway by curcumin inhibits oxidative stress in human nasal fibroblasts exposed to urban particulate mattera Cell viability as measured by MTT assays of human nasal fibroblasts treated with various concentrations of UPM for 24 h. b Cell viability as measured by MTT assays of nasal fibroblasts treated with various concentrations of curcumin for 24 h. c Cell viability as measured by MTT assays of nasal fibroblasts treated with various concentrations of curcumin and 25 μg/mL of UPM for 24 h. Each value in the graph represents the mean ± SEM of three independent experiments. *p < 0.05, **p < 0.01, and ***p < 0.001 vs. 0 μg/mL of UPM or 0 μM of curcumin; #p < 0.05 vs. 25 μg/mL of UPM. MTT: 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide; UPM: urban particulate matter; SEM: standard error of the meanBack to article page