Journal: Virologica Sinica
Article Title: SNX10 enhances HCoV-OC43 infection by facilitating viral entry and inhibiting virus-triggered autophagy
doi: 10.1016/j.virs.2025.07.005
Figure Lengend Snippet: SNX10 deletion inhibits AP2M1 phosphorylation and suppresses viral entry into cells. A Western blot analysis of AP2M1 and p-AP2M1 protein expression in HCT-8 cells with HCoV-OC43 virus infection (MOI = 1) at 24 hours post-infection (hpi). B Western blot analysis of clathrin, AP2M1, p-AP2M1 and SNX10 protein expression in SNX10 -knockout (KO) and control HCT-8 cells (WT) with HCoV-OC43 virus infection (MOI = 1) at 24 hpi. C Co-immunoprecipitation (Co-IP) for the interaction between clathrin, AP2M1 and SNX10 in 293T cells. D Western blot analysis of clathrin, AP2M1, p-AP2M1 and SNX10 protein expression of cell membrane, cytoplasm and whole cell lysate in SNX10-HA overexpressing (OE) and control HCT-8 cells (WT). E Western blot detection of viral protein NP expression after HCT-8 cell treatment with DC-SX029 (10 μM, 50 μM and 100 μM) and AAK1 (10 μM) and infected by HCoV-OC43 virus (MOI= 1) at 24 hpi. F Western blot analysis of clathrin, AP2M1, p-AP2M1 and SNX10 protein expression in HCT-8 cells treated with DC-SX029 or AAK1 and infected by HCoV-OC43 virus (MOI = 1) at 24 hpi. G Representative immunofluorescence (IF) images of clathrin expression of HCT-8 cells treated with DC-SX029 or AAK1 and infected by HCoV-OC43 virus (MOI = 10) at 2 hpi (Scale bar = 5 μm). H Luciferase activity assay of infection efficiency of pseudoviruses in SNX10 -knockout (KO) and control HCT-8 (NC) cells. I–J RT-qPCR of viral NP mRNA level in SNX10 -KO and control HCT-8 cells after HCoV-OC43 virus infection (MOI = 10) at binding stage ( I ), internalization stage ( J ) and acid bypass stage ( K ). L Representative IF images of DIO (green)/DIL (red) staining in HCT-8 cells at 2 hpi (Scale bar = 5 μm). Experiments were repeated 3 times. The data are presented as the mean ± SEM, and P values were calculated using two-tailed Student's t -test. ∗∗ P < 0.01.
Article Snippet: Antibodies were used for immunoblotting and immunofluorescence assay as follows: rabbit monoclonal antibody (mAb) β-actin (Cell Signaling Technology, 4970S); mouse β-actin mAb (Cell Signaling Technology, 97166); mouse polyclonal antibody (pAb) SNX10 (Santa Cruz Biotechnology, sc-293380); mouse SNX10 mAb (Novus, NBP2-45894); rabbit OC43 nucleocapsid protein (NP) mAb (Sino Biological, 40643-T62); rabbit AP2M1 mAb (ABclonal, A11070); rabbit p-AP2M1 pAb (ABclonal, AP0823); rabbit CLATHRIN mAb (Abcam, ab172958); rabbit EEA1 mAb (Abcam, ab109110); rabbit RAB7 mAb (ABclonal, A12308); mouse RAB7 mAb (Santa Cruz Biotechnology, SC-376362); rabbit LAMP1 mAb (ABclonal, A23947); rabbit P62 mAb (Proteintech, 18420-1-AP); rabbit LC3 mAb (Cell Signaling Technology, 3868); rabbit TBK1 mAb (Cell Signaling Technology, 3504); rabbit p-TBK1 mAb (Cell Signaling Technology, 5483); rabbit IRF3 mAb (Cell Signaling Technology, 4302); rabbit p-IRF3 mAb (Cell Signaling Technology, 29047); anti-HA-Tag (Cell Signaling Technology, 3724); Anti-MYC-Tag (Abmart, M20002 ); donkey anti-rabbit IgG (FITC) (GeneTex, GTX26798); goat anti-mouse IgG H&L (FITC) (Abcam, ab6785); HRP-conjugated goat anti-rabbit IgG (Cell Signaling Technology, 7074S); HRP-conjugated goat anti-mouse IgG (Cell Signaling Technology, 7076S); HRP-conjugated rabbit anti-goat IgG (Fdbio, FDG007).
Techniques: Phospho-proteomics, Western Blot, Expressing, Virus, Infection, Knock-Out, Control, Immunoprecipitation, Co-Immunoprecipitation Assay, Membrane, Immunofluorescence, Luciferase, Activity Assay, Quantitative RT-PCR, Binding Assay, Staining, Two Tailed Test