Journal: Cell Insight
Article Title: IRF1 amplifies HSV-1-triggered antiviral innate immunity in a feed-forward manner
doi: 10.1016/j.cellin.2025.100255
Figure Lengend Snippet: IRF1 promotes antiviral innate immunity through its DNA-binding activity . (A) HEK293T cells were transfected with the indicated plasmids, and WCLs were collected for immunoprecipitation with anti-FLAG affinity agarose. The input and immunoprecipitated samples were analyzed by immunoblotting. (B–E) THP-1 cells stably expressing vector control, IRF1-WT, or IRF1-R82A were mock-infected or infected with HSV-1 (MOI = 5). The indicated genes were quantified by RT-qPCR (B–D), and WCLs were analyzed by immunoblotting at 8 h post-infection (E). (F) THP-1 cells stably expressing vector control, IRF1-WT, or IRF1-R82A were mock-infected or infected with HSV-1 (MOI = 10) for 8 h. Cell lysates were collected and pulldown assays were performed using a biotin-labeled ISG54 ISRE probe. The input and probe-bound proteins were analyzed by immunoblotting using an anti-IRF3 polyclonal antibody, and the input samples were also analyzed using an anti-IRF1 monoclonal antibody. (G–K) HT1080 cells stably expressing vector control, IRF1-WT, or IRF1-R82A were mock-infected or infected with VSV (MOI = 5) for 8 h. The expression levels of the indicated genes were quantified by RT-qPCR.
Article Snippet: The following antibodies and reagents were used for immunoblotting and immunoprecipitation: Mouse anti-FLAG monoclonal antibody (1:10,000, Dia-An Biotechnology, catalog no. 2064); Mouse anti-HA monoclonal antibody (1:5000, Dia-An Biotechnology, catalog no. 2063); Mouse anti-β-actin monoclonal antibody (1:5000, Dia-An Biotechnology, catalog no. 2060); Mouse anti-GAPDH monoclonal antibody (1:1000, Santa Cruz, sc-47724); Histone H3 antibody (1:1000, Santa Cruz, sc-517576); Rabbit anti-MITA/STING polyclonal antibody (1:5000, Proteintech, catalog no. 19851-1-AP); Rabbit anti-IRF3 polyclonal antibody (1:1000, Proteintech, catalog no. 11312-1-AP); Rabbit anti-TBK1 monoclonal antibody (1:1000, Cell Signaling Technology, catalog no. 3504); Rabbit anti-phospho-IRF3 (S386) monoclonal antibody (1:1000, Abcam, AB76493); Rabbit anti-phospho-TBK1 (S172) monoclonal antibody (1:1000, Cell Signaling Technology, catalog no. 5483); Rabbit anti-IRF1 monoclonal antibody (1:1000, Cell Signaling Technology, catalog no. 8478); Rabbit IgG (Proteintech, catalog no. 20010049); Mouse anti-ICP0 monoclonal antibody (1:1000, Santa Cruz, sc-53070); Mouse anti-ICP8 monoclonal antibody (1:1000, Santa Cruz, sc-53329); Mouse anti-ICP27 monoclonal antibody (1:1000, Santa Cruz, sc-69806); Mouse anti-ICP5 monoclonal antibody (1:1000, Santa Cruz, sc-56989); IRDye 800CW Goat anti-Rabbit and Goat anti-Mouse secondary antibodies (1:10,000, LI-COR); Anti-FLAG beads (Dia-An Biotechnology); Protein A/G agarose (GE healthcare).
Techniques: Binding Assay, Activity Assay, Transfection, Immunoprecipitation, Western Blot, Stable Transfection, Expressing, Plasmid Preparation, Control, Infection, Quantitative RT-PCR, Labeling