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Springer Science and Business Media LLC Veterinary Research 56(1)
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    초록·키워드

    Transmissible gastroenteritis virus (TGEV) is a major enteric pathogen causing severe diarrhea in swine, with substantial implications for the biosecurity of intensive pig production worldwide. The E3 ubiquitin ligase TRIM7 has emerged as a key regulator of host antiviral immunity, yet its role in TGEV infection remains elusive. Here, we report that TRIM7 is abundantly expressed in porcine intestinal tissue and significantly upregulated upon TGEV challenge in IPEC-J2 cells. Functional studies demonstrated that TRIM7 restricts TGEV replication in IPEC-J2 cells through two distinct mechanisms. Firstly, molecular interaction and co-immunoprecipitation assays revealed that TRIM7 mediates ubiquitin-dependent degradation of the TGEV nucleocapsid (N) protein. Secondly, RNA-seq analysis combined with RIG-I signaling modulation experiments established that TRIM7 enhances RIG-I-mediated type I interferon (IFN) signaling to suppress viral propagation. These findings uncover a dual antiviral role for TRIM7 in countering TGEV infection, highlighting its potential as a therapeutic target for TGEV control.

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