Fig. 6. Activation of regulatory T cells. (A) mRNA level of Foxp3 was analyzed by quantitative reverse transcription-polymerase chain reaction. Protein levels of IL-10 (B) and TGF-β (C) were significantly increased in OVA+TSA group, as measured by enzyme-linked immunosorbent assay. OVA, ovalbumin; TSA, trichostatin A; IL, interleukin; TGF-β, transforming growth factor-beta. *P<0.05 and **P<0.01 compared to controls.
