Persistent Host Markers in Pandemic and H5N1 Influenza Viruses▿
Identifieur interne : 001365 ( Main/Exploration ); précédent : 001364; suivant : 001366Persistent Host Markers in Pandemic and H5N1 Influenza Viruses▿
Auteurs : David B. Finkelstein ; Suraj Mukatira ; Perdeep K. Mehta ; John C. Obenauer ; Xiaoping Su ; Robert G. Webster ; Clayton W. NaeveSource :
- Journal of Virology [ 0022-538X ] ; 2007.
Abstract
Avian influenza viruses have adapted to human hosts, causing pandemics in humans. The key host-specific amino acid mutations required for an avian influenza virus to function in humans are unknown. Through multiple-sequence alignment and statistical testing of each aligned amino acid, we identified markers that discriminate human influenza viruses from avian influenza viruses. We applied strict thresholds to select only markers which are highly preserved in human influenza virus isolates over time. We found that a subset of these persistent host markers exist in all human pandemic influenza virus sequences from 1918, 1957, and 1968, while others are acquired as the virus becomes a seasonal influenza virus. We also show that human H5N1 influenza viruses are significantly more likely to contain the amino acid predominant in human strains for a few persistent host markers than avian H5N1 influenza viruses. This sporadic enrichment of amino acids present in human-hosted viruses may indicate that some H5N1 viruses have made modest adaptations to their new hosts in the recent past. The markers reported here should be useful in monitoring potential pandemic influenza viruses.
Url:
DOI: 10.1128/JVI.00921-07
PubMed: 17652405
PubMed Central: 2045501
Affiliations:
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Naeve</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author></analytic><series><title level="j">Journal of Virology</title><idno type="ISSN">0022-538X</idno><idno type="eISSN">1098-5514</idno><imprint><date when="2007">2007</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><p>Avian influenza viruses have adapted to human hosts, causing pandemics in humans. The key host-specific amino acid mutations required for an avian influenza virus to function in humans are unknown. Through multiple-sequence alignment and statistical testing of each aligned amino acid, we identified markers that discriminate human influenza viruses from avian influenza viruses. We applied strict thresholds to select only markers which are highly preserved in human influenza virus isolates over time. We found that a subset of these persistent host markers exist in all human pandemic influenza virus sequences from 1918, 1957, and 1968, while others are acquired as the virus becomes a seasonal influenza virus. We also show that human H5N1 influenza viruses are significantly more likely to contain the amino acid predominant in human strains for a few persistent host markers than avian H5N1 influenza viruses. This sporadic enrichment of amino acids present in human-hosted viruses may indicate that some H5N1 viruses have made modest adaptations to their new hosts in the recent past. The markers reported here should be useful in monitoring potential pandemic influenza viruses.</p></div></front></TEI><affiliations><list></list><tree><noCountry><name sortKey="Finkelstein, David B" sort="Finkelstein, David B" uniqKey="Finkelstein D" first="David B." last="Finkelstein">David B. 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