期刊
JOURNAL OF PROTEOME RESEARCH
卷 20, 期 8, 页码 4113-4130出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jproteome.1c00434
关键词
peste des petits ruminants virus; quantitative proteomics; FANCL; innate immune response; TBK1
资金
- National Key R&D Program of China [2018YFD0500103, 2017YFD0501100]
- Chinese Academy of Agricultural Science and Technology Innovation Project [CAAS-ASTIP-2021-LVRI, Y2017JC55]
PPRV infection causes immunosuppression in the host, but the mechanisms of how the host counteracts this immunosuppression remain largely unknown. High-throughput proteomic analysis revealed that inhibiting the innate immune response promoted PPRV replication in goat cells, while the host protein FANCL may inhibit PPRV infection by enhancing IFN expression.
Peste des petits ruminants virus (PPRV) infection causes considerable innate immunosuppression in its host, which promotes viral replication. However, how the host rescues the innate immune response to counteract this immunosuppression during viral replication remains largely unknown. To explore the mechanisms of how a host counteracts PPRV-mediated innate immunosuppression, a high-throughput quantitation proteomic approach (isobaric tags for relative and absolute quantitation in conjunction with LC-MS/MS) was used to investigate the proteome landscape of goat fetal fibroblasts (GFFs) in response to PPRV infection. Eventually, 497 upregulated proteins and 358 downregulated proteins were identified. Many of the differentially expressed proteins were enriched in immune-related pathways. Blocking the activation of the innate immune response with a specific inhibitor BX795 in GFFs remarkably promoted PPRV replication, suggesting the significant antiviral role of the enriched immune-related pathways. The GO enrichment analysis showed that the host protein FANCL revealed a similar expression pattern to these innate immune-related proteins. In addition, the analysis of protein-protein interaction networks reveals a potential relationship between FANCL and the innate immune pathway. We determined that FANCL inhibited PPRV infection by enhancing type I interferon (IFN) and IFN-stimulated gene expression. Further investigation determined that FANCL induced type I IFN production by promoting TBK1 phosphorylation, thus impairing PPRV-mediated immunosuppression.
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