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Abstract：
Purpose: To explore the pathogenesis that TIMP-1 mediated in adult orbital xanthogranulomatous disease (AOXGD), a rare type of non-Langerhans histiocytosis that damages the appearance and quality of life of patientsMethods: We reviewed 22 patients diagnosed with AOXGD based on clinical manifestations and histological analysis, and then investigated the expression of TIMP-1 and IL-6 with q-PCR and IHC in AOXGD tissues and the possible mechanism involved in the induction of TIMP-1 by IL-6.Results: IL-6 and TIMP-1 were significantly increased in AOXGD tissues. IL-6 promoted TIMP-1 production by M1 macrophages by stimulating the phosphorylation of JAK2 and STAT3. Moreover, IL-17 and IFN-γ, the classical markers of Th1 and Th17 cells, were increased in AOXGD.Conclusion: These data implied that the IL6~JAK2/STAT3-TIMP-1 signalling pathway is activated in AOXGD and that adaptive Th1 and Th17 responses are involved in the development of AOXGD.
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