{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,23]],"date-time":"2026-10-23T23:34:55Z","timestamp":1792798495360,"version":"4.5.0"},"reference-count":62,"publisher":"American Society for Microbiology","issue":"19","license":[{"start":{"date-parts":[[2018,10,1]],"date-time":"2018-10-01T00:00:00Z","timestamp":1538352000000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/journals.asm.org\/non-commercial-tdm-license"}],"funder":[{"name":"University of Rochester Research Award","id":[{"id":"https:\/\/ror.org\/022kthw22","id-type":"ROR","asserted-by":"crossref"}]},{"DOI":"10.13039\/100012818","name":"Comunidad de Madrid","doi-asserted-by":"crossref","id":[{"id":"10.13039\/100012818","id-type":"DOI","asserted-by":"crossref"}]},{"DOI":"10.13039\/100000060","name":"HHS | NIH | National Institute of Allergy and Infectious Diseases","doi-asserted-by":"publisher","award":["HHSN272201400005C"],"award-info":[{"award-number":["HHSN272201400005C"]}],"id":[{"id":"10.13039\/100000060","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["journals.asm.org"],"crossmark-restriction":true},"short-container-title":["J Virol"],"published-print":{"date-parts":[[2018,10]]},"abstract":"<jats:p>\n                    IAVs emerge in humans from animal reservoirs, causing unpredictable pandemics. One of these pandemics was caused by an H1N1 virus in 2009, and this virus is still circulating seasonally. To analyze host-virus adaptations likely affecting influenza virus pathogenesis, protein amino acid sequences from viruses circulating at the beginning of the pandemic and those circulating currently were compared. Currently circulating viruses have incorporated amino acid changes in two viral proteins (NS1 and PA-X), affecting innate immune responses, and in the PA gene. These amino acid differences led to increased NS1-mediated and decreased PA-X-mediated inhibition of host gene expression. A recombinant pH1N1 virus containing PA, PA-X, and NS1 genes from recently circulating viruses is fitter in replication in tissue culture cells and in mice, and the virus is more pathogenic\n                    <jats:italic>in vivo<\/jats:italic>\n                    . Importantly, these results suggest that a balance in the abilities of NS1 and PA-X to induce host shutoff is beneficial for IAVs.\n                  <\/jats:p>","DOI":"10.1128\/jvi.01206-18","type":"journal-article","created":{"date-parts":[[2018,7,17]],"date-time":"2018-07-17T07:53:11Z","timestamp":1531813991000},"update-policy":"https:\/\/doi.org\/10.1128\/asmj-crossmark-policy-page","source":"Crossref","is-referenced-by-count":60,"title":["Functional Evolution of the 2009 Pandemic H1N1 Influenza Virus NS1 and PA in Humans"],"prefix":"10.1128","volume":"92","author":[{"given":"Aitor","family":"Nogales","sequence":"first","affiliation":[{"name":"Department of Microbiology and Immunology, University of Rochester, Rochester, New York, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Luis","family":"Martinez-Sobrido","sequence":"additional","affiliation":[{"name":"Department of Microbiology and Immunology, University of Rochester, Rochester, New York, USA"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Kevin","family":"Chiem","sequence":"additional","affiliation":[{"name":"Department of Microbiology and Immunology, University of Rochester, Rochester, New York, USA"},{"name":"David H. 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