{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,4]],"date-time":"2026-09-04T17:49:22Z","timestamp":1788544162596,"version":"build-2803163510"},"reference-count":65,"publisher":"MDPI AG","issue":"4","license":[{"start":{"date-parts":[[2023,2,16]],"date-time":"2023-02-16T00:00:00Z","timestamp":1676505600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"the National Key Research and Development Program","award":["2021YFD1801205"],"award-info":[{"award-number":["2021YFD1801205"]}]},{"name":"the National Key Research and Development Program","award":["221114116439068"],"award-info":[{"award-number":["221114116439068"]}]},{"name":"the Yunfu Science and Technology Program","award":["2021YFD1801205"],"award-info":[{"award-number":["2021YFD1801205"]}]},{"name":"the Yunfu Science and Technology Program","award":["221114116439068"],"award-info":[{"award-number":["221114116439068"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["IJMS"],"abstract":"<jats:p>Porcine epidemic diarrhea (PED) is an acute and severe atrophic enteritis caused by porcine epidemic diarrhea virus (PEDV) that infects pigs and makes huge economic losses to the global swine industry. Previously, researchers have believed that porcine aminopeptidase-N (pAPN) was the primary receptor for PEDV, but it has been found that PEDV can infect pAPN knockout pigs. Currently, the functional receptor for PEDV remains unspecified. In the present study, we performed virus overlay protein binding assay (VOPBA), found that ATP1A1 was the highest scoring protein in the mass spectrometry results, and confirmed that the CT structural domain of ATP1A1 interacts with PEDV S1. First, we investigated the effect of ATP1A1 on PEDV replication. Inhibition of hosts ATP1A1 protein expression using small interfering RNA (siRNAs) significantly reduced the cells susceptibility to PEDV. The ATP1A1-specific inhibitors Ouabain (a cardiac steroid) and PST2238 (a digitalis toxin derivative), which specifically bind ATP1A1, could block the ATP1A1 protein internalization and degradation, and consequently reduce the infection rate of host cells by PEDV significantly. Additionally, as expected, overexpression of ATP1A1 notably enhanced PEDV infection. Next, we observed that PEDV infection of target cells resulted in upregulation of ATP1A1 at the mRNA and protein levels. Furthermore, we found that the host protein ATP1A1 was involved in PEDV attachment and co-localized with PEDV S1 protein in the early stage of infection. In addition, pretreatment of IPEC-J2 and Vero-E6 cells with ATP1A1 mAb significantly reduced PEDV attachment. Our observations provided a perspective on identifying key factors in PEDV infection, and may provide valuable targets for PEDV infection, PEDV functional receptor, related pathogenesis, and the development of new antiviral drugs.<\/jats:p>","DOI":"10.3390\/ijms24044000","type":"journal-article","created":{"date-parts":[[2023,2,16]],"date-time":"2023-02-16T05:11:29Z","timestamp":1676524289000},"page":"4000","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":12,"title":["The Alpha-1 Subunit of the Na+\/K+-ATPase (ATP1A1) Is a Host Factor Involved in the Attachment of Porcine Epidemic Diarrhea Virus"],"prefix":"10.3390","volume":"24","author":[{"given":"Moukang","family":"Xiong","sequence":"first","affiliation":[{"name":"College of Animal Science & National Engineering Center for Swine Breeding Industry, South China Agriculture University, Guangzhou 510642, China"},{"name":"Lingnan Modern Agricultural Science and Technology Guangdong Laboratory, Guangzhou 510000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3550-428X","authenticated-orcid":false,"given":"Xianhui","family":"Liu","sequence":"additional","affiliation":[{"name":"College of Animal Science & National Engineering Center for Swine Breeding Industry, South China Agriculture University, Guangzhou 510642, China"},{"name":"Lingnan Modern Agricultural Science and Technology Guangdong Laboratory, Guangzhou 510000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tairun","family":"Liang","sequence":"additional","affiliation":[{"name":"College of Animal Science & National Engineering Center for Swine Breeding Industry, South China Agriculture University, Guangzhou 510642, China"},{"name":"Lingnan Modern Agricultural Science and Technology Guangdong Laboratory, Guangzhou 510000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanfang","family":"Ban","sequence":"additional","affiliation":[{"name":"College of Animal Science & National Engineering Center for Swine Breeding Industry, South China Agriculture University, Guangzhou 510642, China"},{"name":"Lingnan Modern Agricultural Science and Technology Guangdong Laboratory, Guangzhou 510000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yanling","family":"Liu","sequence":"additional","affiliation":[{"name":"College of Animal Science & National Engineering Center for Swine Breeding Industry, South China Agriculture University, Guangzhou 510642, China"},{"name":"Lingnan Modern Agricultural Science and Technology Guangdong Laboratory, Guangzhou 510000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Leyi","family":"Zhang","sequence":"additional","affiliation":[{"name":"College of Animal Science & National Engineering Center for Swine Breeding Industry, South China Agriculture University, Guangzhou 510642, China"},{"name":"Lingnan Modern Agricultural Science and Technology Guangdong Laboratory, Guangzhou 510000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zheng","family":"Xu","sequence":"additional","affiliation":[{"name":"College of Animal Science & National Engineering Center for Swine Breeding Industry, South China Agriculture University, Guangzhou 510642, China"},{"name":"Lingnan Modern Agricultural Science and Technology Guangdong Laboratory, Guangzhou 510000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5311-0439","authenticated-orcid":false,"given":"Changxu","family":"Song","sequence":"additional","affiliation":[{"name":"College of Animal Science & National Engineering Center for Swine Breeding Industry, South China Agriculture University, Guangzhou 510642, China"},{"name":"Lingnan Modern Agricultural Science and Technology Guangdong Laboratory, Guangzhou 510000, China"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2023,2,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"17250","DOI":"10.1074\/jbc.M313239200","article-title":"Ouabain Assembles Signaling Cascades through the Caveolar Na+\/K+-ATPase","volume":"279","author":"Wang","year":"2004","journal-title":"J. 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