Journal
INFLAMMATION
Volume 39, Issue 1, Pages 309-319Publisher
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10753-015-0251-9
Keywords
fibroblast growth factor 21(FGF21); TH17 cell; IL-17; CIA mice
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Funding
- Scientific Research Foundation of Harbin University of Commerce for PhD [92508177]
- National Natural Science Fund biologic science base improve program of research training and capacity [J1210069/J0131]
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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-alpha, IL-1 beta, 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 ROR gamma t 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/ROR gamma t pathway. Modulating of Th17-mediated inflammatory response may be one of the mechanisms for FGF21 attenuating inflammation in CIA.
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