Abstract：
:Recognition of pathogen-associated molecular patterns (PAMPs) by pattern-recognition receptors (PRRs) is important in innate immune signaling. Toll-like receptors (TLRs) are well-characterized PRRs and are pivotal in antiviral and antitumor host defense. TIR domain-containing adaptor molecule 1 (TICAM-1, also called TRIF) is an adapter molecule in TLR3- and TLR4-mediated IRF3 activation, late-phase NF-κB activation and MAPK-mediated AP-1 activation. When a TLR3 ligand is added to TLR3-positive cells, TICAM-1 transiently interacts with TLR3 and forms multimers in the cytosol. However, the precise mechanism of TICAM-1 multimer formation remains unknown. In this study, we identified 14-3-3-zeta as a molecule that functions in TLR3-mediated signaling. Knockdown of 14-3-3-zeta reduced production of type I interferon and inflammatory cytokines, nuclear translocation of IRF3 and phosphorylation of IκB via the TLR3-TICAM-1 pathway. Furthermore, TICAM-1 multimerization by ligand stimulation was prohibited by 14-3-3-zeta knockdown. These results suggest that 14-3-3-zeta is involved in the TLR3-TICAM-1 pathway in promoting multimerization of TICAM-1 for the formation of a TICAM-1 signalosome.
journal_name
Mol Immunoljournal_title
Molecular immunologyauthors
Funami K,Matsumoto M,Obuse C,Seya Tdoi
10.1016/j.molimm.2016.03.010subject
Has Abstractpub_date
2016-05-01 00:00:00pages
60-8eissn
0161-5890issn
1872-9142pii
S0161-5890(16)30038-4journal_volume
73pub_type
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