TICAM1 Knockout Cell Line (A549)

The choice depends on whether you are studying TLR3/TLR4 MyD88-independent signaling or TICAM1's role in antiviral and inflammatory responses. The Knockout line is appropriate for asking whether TICAM1 (TRIF) is required for type I IFN induction downstream of TLR3 (dsRNA sensing) and TLR4 (LPS sensing — endosomal arm). Overexpression is useful for testing whether elevated TICAM1 is sufficient to drive IFN responses. For antiviral immunity research, the EDITGENE TICAM1 Knockout in A-549 is highly relevant — A-549 is widely used in respiratory virus infection studies, and TICAM1 mediates IFN induction following dsRNA detection during many viral infections. Rescue with wild-type or TIR-domain-deleted TICAM1 separates adaptor function from other signaling roles.

Primary applications: • TLR3 signaling: poly(I:C)-induced type I IFN and ISG expression analysis in the absence of TICAM1. • Antiviral response: viral infection studies in A-549 (influenza, respiratory syncytial virus, others) to assess TICAM1's contribution to host antiviral defense. • TLR4 endosomal arm: LPS-induced TRAM/TRIF-dependent IFN responses, distinguishable from MyD88-dependent inflammatory signaling. • Apoptosis pathway studies: TICAM1-mediated apoptosis through the RIP1-FADD-caspase-8 axis following TLR3 stimulation. EDITGENE recommends this model for researchers investigating TLR3/TLR4 signaling, antiviral immunity in respiratory epithelium, and TRIF-dependent innate immune responses.

Yes. TICAM1 rescue experiments require attention to TIR domain function and adaptor recruitment: • Construct design: use a codon-modified TICAM1 sequence with a C-terminal tag (FLAG, HA). TICAM1 contains an N-terminal TIR domain critical for TLR3/TLR4 receptor binding. • TIR domain mutant rescue: TIR-domain point mutations (e.g., P434H) disrupt receptor binding and serve as specificity controls for adaptor function. • Functional readout: rescue should restore poly(I:C)-induced IFN-β reporter activation and ISG expression in A-549. • Combined assay design: rescue should be tested under TLR3 (poly(I:C)) and TLR4 (LPS) stimulation conditions to confirm both signaling pathways are restored. A-549 transduces efficiently with lentivirus and supports stable rescue line generation in the respiratory virus research context.