Curcumin regulated the cytokine expression in the colon mucosa of DSS-induced colitis. (a) Quantitative reverse transcription polymerase chain reaction analysis of the mRNA expression of TNF-α, IL-6, IL-10, and IL-17A in each group. Data are presented as mean±SEM. **p<0.01. n=8 for each group. (b) Western blot analysis of the protein levels of TNF-α, IL-6, IL-10, and IL-17A in each group. β-Actin was used as the control