Abstract
Recently, FGF21 was reported to play an important role in anti-inflammation. The aim of the study is to explore the mechanism for FGF21 alleviating inflammation of CIA. CIA mice were injected with FGF21 once a day for 28 days after first booster immunization. The results showed that FGF21 alleviates arthritis severity and decreases serum anti-CII antibodies levels in CIA mice. Compared with CIA model, the number of the splenic TH17 cells was significantly decreased in FGF21-treated mice. FGF21 treatment reduced the mRNA expression of IL-17, TNF-α, IL-1β, IL-6, IL-8, and MMP3 and increased level of IL-10 in the spleen tissue. The expression of STAT3 and phosphorylated STAT3 was suppressed in FGF21-treated group. The mRNA expression of RORγt and IL-23 also decreased. In conclusion, these findings suggest that the beneficial effects of FGF21 on CIA mice were achieved by down-regulating Th17-IL-17 axis through STAT3/RORγt pathway. Modulating of Th17-mediated inflammatory response may be one of the mechanisms for FGF21 attenuating inflammation in CIA.
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This study was supported by The Scientific Research Foundation of Harbin University of Commerce for PhD (NO.92508177) and The National Natural Science Fund biologic science base improve program of research training and capacity (NO. J1210069/J0131)
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Li, Sm., Yu, Yh., Li, L. et al. Treatment of CIA Mice with FGF21 Down-regulates TH17-IL-17 Axis. Inflammation 39, 309–319 (2016). https://doi.org/10.1007/s10753-015-0251-9
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DOI: https://doi.org/10.1007/s10753-015-0251-9