FSTL1 aggravates OVA-induced inflammatory responses by activating the NLRP3/IL-1 beta signaling pathway in mice and macrophages
FSTL1 aggravates OVA-induced inflammatory responses by activating the NLRP3/IL-1 beta signaling pathway in mice and macrophages
复制标题
FSTL1通过激活小鼠和巨噬细胞中的NLRP3/IL-1β信号通路加重OVA诱导的炎症反应
DOI：
10.1007/s00011-021-01475-w
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发表时间：
2021
影响因子：
6.7
通讯作者：
Dong Liang
中科院分区：
文献类型：
--
作者：
Wang Yan;Zhang Dong;Liu Tian;Wang Jun-fei;Wu Jin-xiang;Zhao Ji-ping;Xu Jia-wei;Zhang Jin-tao;Dong Liang
ObjectiveAsthma, a well-known disease with high morbidity, is characterized by chronic airway inflammation. However, the allergic inflammation mechanisms of follistatin-like protein 1 (FSTL1) have not been elucidated. This study aims to investigate the effects of FSTL1 in ovalbumin (OVA)-induced mice and macrophages on nucleotide-binding domain and leucine-rich repeat protein 3 (NLRP3)/interleukin-1β (IL-1β) signaling pathway.MethodsMice were randomly divided into control-WT, OVA-WT, control-Fstl1±, OVA-Fstl1±. Histological changes were assessed by HE and PAS staining. The protein levels of Muc-5AC, FSTL1, NLRP3, and IL-1β in lung tissue were detected by immunohistochemistry and ELISA. The bronchoalveolar lavage fluid (BALF) in mice and human serum samples were detected by ELISA. Then, mice were grouped into control, FSTL1, MCC950 + FSTL1 to further investigate the relationship between FSTL1 and NLRP3/IL-1β. Alveolar macrophage cells (MH-S cells) were separated into control, OVA, FSTL1, OVA + FSTL1, OVA + siNC, OVA + siFSTL1, MCC950, and FSTL1 + MCC950 groups to explore the effect of FSTL1 on the NLRP3/IL-1β signaling. The protein expression of NLRP3 and IL-1β in MH-S cells was detected by Western blot analysis.ResultsThe present results uncovered thatFstl1±significantly ameliorated OVA-induced Muc-5AC production and mucus hypersecretion.Fstl1±was also found to decrease the production of inflammatory cytokines and inflammatory cell infiltration in OVA-induced asthmatic mice. Meanwhile, the serum concentrations of FSTL1 and IL-1β were higher in asthma subjects than the health subjects, andFstl1±ameliorated the production of NLRP3 and IL-1β in OVA-induced asthmatic mice. Furthermore, mice by injected FSTL1 substantially stimulated the expression of NLRP3 and IL-1β, while pretreatment with MCC950 in mice significantly weakened the production of NLRP3 and IL-1β induced by injection FSTL1. Pretreatment with siFSTL1 or MCC950 significantly reduced the production of NLRP3 and IL-1β induced by OVA or FSTL1 in MH-S cells.ConclusionsThe study results showed that FSTL1 played an important role in allergic airway inflammation by activating NLRP3/IL-1β. Hence, inhibition FSTL1 could be applied as a therapeutic agent against asthma.
