Fig. 2

Curcumin increased HO-1 protein expression. a Cells were incubated with 5–15 μM of curcumin for 12 h as indicated. b Cells were incubated with 15 μM of curcumin for the indicated amounts of time. HO-1 protein expression was determined by western blot analysis. Data were presented as mean ± SD (n = 3). *p < 0.05 vs. Cont