{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,1,8]],"date-time":"2026-01-08T21:41:29Z","timestamp":1767908489373,"version":"3.49.0"},"reference-count":50,"publisher":"Frontiers Media SA","license":[{"start":{"date-parts":[[2023,8,1]],"date-time":"2023-08-01T00:00:00Z","timestamp":1690848000000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100013058","name":"Jiangsu Provincial Key Research and Development Program","doi-asserted-by":"publisher","award":["BE2019344"],"award-info":[{"award-number":["BE2019344"]}],"id":[{"id":"10.13039\/501100013058","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["31972535, 31972531"],"award-info":[{"award-number":["31972535, 31972531"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100002858","name":"China Postdoctoral Science Foundation","doi-asserted-by":"publisher","award":["2018T110564"],"award-info":[{"award-number":["2018T110564"]}],"id":[{"id":"10.13039\/501100002858","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100012246","name":"Priority Academic Program Development of Jiangsu Higher Education Institutions","doi-asserted-by":"publisher","id":[{"id":"10.13039\/501100012246","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["frontiersin.org"],"crossmark-restriction":true},"short-container-title":["Front. Immunol."],"abstract":"<jats:p>Interferon regulatory factor 8 (<jats:italic>IRF8<\/jats:italic>) is a key regulator of innate immune receptor signaling that resists pathogen invasion by regulating cell growth and differentiation. Porcine epidemic diarrhea virus (PEDV) targets the intestine and damages the mucosal barrier. However, whether <jats:italic>IRF8<\/jats:italic> regulates PEDV replication remains unclear. We revealed that PEDV infection activated <jats:italic>IRF8<\/jats:italic> expression. Moreover, <jats:italic>IRF8<\/jats:italic> deletion drastically promoted PEDV replication and invasion, increasing the virus copies and titers. Hypomethylation enrichment of activating protein (AP)-2\u03b1 was significantly negatively correlated with high <jats:italic>IRF8<\/jats:italic> expression, and AP-2\u03b1 directly targeted the <jats:italic>IRF8<\/jats:italic> promoter to regulate PEDV replication. Furthermore, <jats:italic>IRF8<\/jats:italic> overexpression decreased the cellular reactive oxygen species levels and mitochondrial membrane potential and increased the antioxidant enzyme activities to alleviate PEDV-induced oxidative damage. <jats:italic>IRF8<\/jats:italic> overexpression suppressed apoptotic gene expression, thereby inhibiting apoptosis in response to PEDV stimulation. Taken together, this study demonstrates that AP-2\u03b1 is involved in PEDV-induced epigenetic modification of <jats:italic>IRF8<\/jats:italic> to reduce cell apoptosis and oxidative stress and facilitate host resistance to PEDV in the intestinal epithelium.<\/jats:p>","DOI":"10.3389\/fimmu.2023.1187144","type":"journal-article","created":{"date-parts":[[2023,8,1]],"date-time":"2023-08-01T14:26:15Z","timestamp":1690899975000},"update-policy":"https:\/\/doi.org\/10.3389\/crossmark-policy","source":"Crossref","is-referenced-by-count":3,"title":["Hypomethylated interferon regulatory factor 8 recruits activating protein-2\u03b1 to attenuate porcine epidemic diarrhea virus infection in porcine 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