Citation: Haobin Li, Huiyi Guo, Binhao Rong, Haowei Li, Wenjiao Wu, Chan Yang, Shuwen Liu. SNX10 enhances HCoV-OC43 infection by facilitating viral entry and inhibiting virus-triggered autophagy .VIROLOGICA SINICA, 2025, 40(5) : 755-768.  http://dx.doi.org/10.1016/j.virs.2025.07.005

SNX10 enhances HCoV-OC43 infection by facilitating viral entry and inhibiting virus-triggered autophagy

  • Corresponding author: Shuwen Liu, liusw@smu.edu.cn
  • Received Date: 22 March 2025
    Accepted Date: 07 July 2025
    Available online: 09 July 2025
  • The ongoing coronavirus epidemic, including the novel coronavirus (SARS-CoV-2), continues to pose a significant threat to global public health. Host targets address multiple stages of the viral life cycle and provide diverse opportunities for therapeutic interventions. This study identified sorting nexin 10 (SNX10) as a facilitator of replication of human coronavirus OC43 (HCoV-OC43), underscoring its potential as a novel antiviral target. The knockout of SNX10 significantly suppressed HCoV-OC43 replication both in vivo and in vitro. Immunoprecipitation-mass spectrometry (‌IP-MS) analysis identified the adaptor protein complex 2 subunit μ1 (AP2M1) as a direct interactor of SNX10. Specifically, SNX10 facilitates phosphorylation of the AP2M1, thereby enhancing clathrin-mediated viral endocytosis. Furthermore, subsequent binding and internalization assays revealed that SNX10 knockout significantly inhibits viral entry into host cells. Conversely, the reconstitution of SNX10 fully restored viral entry, thereby confirming the critical and indispensable role of SNX10 in pathogen internalization. Simultaneously, SNX10 was identified as a key factor that promotes endosomal acidification by modulating pH levels, which in turn facilitated the release of the viral genome. Notably, the ablation of SNX10 was found to trigger autophagy activation during infection, thereby maintaining intracellular homeostasis. Additionally, it exerted autonomous antiviral effects through lysosomal degradation pathways. Collectively, these findings demonstrate SNX10 serves as a pivotal regulator of the viral life cycle and underscore its therapeutic potential as a multi-faceted antiviral candidate target capable of simultaneously inhibiting viral internalization, viral genomic release, and host-pathogen equilibrium.

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    SNX10 enhances HCoV-OC43 infection by facilitating viral entry and inhibiting virus-triggered autophagy

      Corresponding author: Shuwen Liu, liusw@smu.edu.cn
    • a. Guangdong-Hongkong-Macao Joint Laboratory for New Drug Screening, Guangdong Provincial Key Laboratory of New Drug Screening, School of Pharmaceutical Sciences, Southern Medical University, Guangzhou, 510515, China;
    • b. Department of Pharmacy, Jinan University Affiliated Guangdong Second Provincial General Hospital, Guangzhou, 510317, China;
    • c. MOE Key Laboratory of Infectious Diseases Research in South China, MOE Innovation Center for Medical Basic Research on Inflammation and Immune Related Diseases, Southern Medical University, Guangzhou, 510515, China;
    • d. NMPA Key Laboratory for Research and Evaluation of Drug Metabolism, Department of Pharmacy, Pingshan Hospital, Southern Medical University, Shenzhen, 518100, China;
    • e. State Key Laboratory of Organ Failure Research, Guangdong Provincial Institute of Nephrology, Southern Medical University, Guangzhou, 510515, China

    Abstract: The ongoing coronavirus epidemic, including the novel coronavirus (SARS-CoV-2), continues to pose a significant threat to global public health. Host targets address multiple stages of the viral life cycle and provide diverse opportunities for therapeutic interventions. This study identified sorting nexin 10 (SNX10) as a facilitator of replication of human coronavirus OC43 (HCoV-OC43), underscoring its potential as a novel antiviral target. The knockout of SNX10 significantly suppressed HCoV-OC43 replication both in vivo and in vitro. Immunoprecipitation-mass spectrometry (‌IP-MS) analysis identified the adaptor protein complex 2 subunit μ1 (AP2M1) as a direct interactor of SNX10. Specifically, SNX10 facilitates phosphorylation of the AP2M1, thereby enhancing clathrin-mediated viral endocytosis. Furthermore, subsequent binding and internalization assays revealed that SNX10 knockout significantly inhibits viral entry into host cells. Conversely, the reconstitution of SNX10 fully restored viral entry, thereby confirming the critical and indispensable role of SNX10 in pathogen internalization. Simultaneously, SNX10 was identified as a key factor that promotes endosomal acidification by modulating pH levels, which in turn facilitated the release of the viral genome. Notably, the ablation of SNX10 was found to trigger autophagy activation during infection, thereby maintaining intracellular homeostasis. Additionally, it exerted autonomous antiviral effects through lysosomal degradation pathways. Collectively, these findings demonstrate SNX10 serves as a pivotal regulator of the viral life cycle and underscore its therapeutic potential as a multi-faceted antiviral candidate target capable of simultaneously inhibiting viral internalization, viral genomic release, and host-pathogen equilibrium.

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