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- W4313405825 abstract "Abstract Mutations in the autophagy gene EPG5 are responsible for Vici syndrome, a multisystem human genetic disease with a combined immunodeficiency component. However, the mechanism(s) by which EPG5 regulates immune signaling are incompletely understood. Previously, we found that Epg5−/− mice are resistant to influenza and exhibit hyperinflammation in the lungs including elevated IL1B/IL-1β and TNF/TNFa. Here, we show that the disruption of Epg5 results in protection against multiple enteric viruses including norovirus and rotavirus. RNA sequencing revealed that IFN-λ responses are highly upregulated in the intestines of Epg5−/− mice. Further, mice lacking Epg5 exhibit substantial alterations of the intestinal microbiota. Surprisingly, germ-free Epg5−/− mice showed persistent inflammation of both the intestine and lung, suggesting a microbiota independent mechanism. Epg5−/−Ifnlr1−/− mice, which lack the receptor for IFN-λ, regained susceptibility to viral infection but maintained microbial dysbiosis, indicating that IFN-λ signaling is the primary mediator of resistance to enteric viruses but is dispensable for microbial dysbiosis in Epg5−/− mice. Intriguingly, epg-5-mutant Caenorhabditis elegans animals are also resistant to Orsay virus, which is an intestinal cell-tropic virus and the only known virus that naturally infects C. elegans. This study unveils an important role for autophagy gene Epg5 in protection of mammalian hosts by modulating intestinal IFN-λ responses, which is unexpectedly independent of the microbiota, and raises the possibility of a conserved viral resistance mechanism that is shared between C. elegans and mammals." @default.
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- W4313405825 date "2022-05-01" @default.
- W4313405825 modified "2023-10-14" @default.
- W4313405825 title "The autophagy gene <i>Epg5</i> promotes susceptibility to enteric viral infection" @default.
- W4313405825 doi "https://doi.org/10.4049/jimmunol.208.supp.114.13" @default.
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