Abstract:
:The endogenously activated rheumatoid arthritis (RA) synovial fibroblasts (RSFs) are likely to be the key to curing the disease. RSFs express Toll‑like receptors (TLRs) rendering them prone to activation by exogenous and endogenous TLR ligands, resulting in the production of chemokines and cytokines Germline deletion of tumor necrosis factor‑α‑induced protein‑8 like 2 (TIPE2, also known as TNFAIP8L2) results in fatal inflammation and hypersensitivity to TLR and T cell receptor stimulation. The present study demonstrates an inverse association between TIPE2 and cytokine gene expression in RSFs following lipopolysaccharide (LPS) stimulation. Enhanced TIPE2 expression decreased Ras‑related C3 botulinum toxin substrate (Rac) activation and interferon regulatory factor 3 phosphorylation, and phosphoinositide 3‑kinase and Rac inhibition significantly diminished LPS‑induced cytokine gene expression in RSFs. In conclusion, the findings of the present study demonstrate that TIPE2 serves a negative role in activating the Rac signaling pathway and in the initiation of the immune response by decreasing the activity of proinflammatory cytokines. These results may be useful in designing novel strategies for the prevention and treatment of RA.
journal_name
Mol Med Repjournal_title
Molecular medicine reportsauthors
Shi C,Wang Y,Zhuang G,Qi Z,Li Y,Yin Pdoi
10.3892/mmr.2017.7311subject
Has Abstractpub_date
2017-11-01 00:00:00pages
6346-6353issue
5eissn
1791-2997issn
1791-3004journal_volume
16pub_type
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