Th17/IL-17 production stimulated by rIL-23. A. Representative pictures of CD4+IL-17+ Th17 cells stimulated by rIL-23. The numbers in the upper right quadrants represents the mean percentage of Th17 in response to 5 d of culture with or without IL-23. B. The results of Th17 cells statistical analysis. *P < 0.05. C. Strong expression of IL-17 and STAT3 after rIL-23 stimulation. D. Densitometric quantitation of IL-17 and STAT3 mRNA in the cultured cells after rIL-23 stimulation. *P < 0.05. E. IL-17 protein levels in the culture supernatant were significantly increased after rIL-23 stimulation *P < 0.01.