Genetic Characterization of the Influenza A Pandemic (H1N1) 2009 Virus Isolates from India
Identifieur interne : 000E80 ( Main/Exploration ); précédent : 000E79; suivant : 000E81Genetic Characterization of the Influenza A Pandemic (H1N1) 2009 Virus Isolates from India
Auteurs : Varsha A. Potdar ; Mandeep S. Chadha ; Santosh M. Jadhav ; Jayati Mullick ; Sarah S. Cherian ; Akhilesh C. MishraSource :
- PLoS ONE [ 1932-6203 ] ; 2010.
Abstract
The Influenza A pandemic H1N1 2009 (H1N1pdm) virus appeared in India in May 2009 and thereafter outbreaks with considerable morbidity and mortality have been reported from many parts of the country. Continuous monitoring of the genetic makeup of the virus is essential to understand its evolution within the country in relation to global diversification and to track the mutations that may affect the behavior of the virus.
H1N1pdm viruses were isolated from both recovered and fatal cases representing major cities and sequenced. Phylogenetic analyses of six concatenated whole genomes and the hemagglutinin (HA) gene of seven more isolates from May-September 2009 was performed with reference to 685 whole genomes of global isolates available as of November 24, 2009. Molecular characterization of all the 8 segments was carried out for known pathogenic markers.
The first isolate of May 2009 belonged to clade 5. Although clade 7 was the dominant H1N1pdm lineage in India, both clades 6 and 7 were found to be co-circulating. The neuraminidase of all the Indian isolates possessed H275, the marker for sensitivity to the neuraminidase inhibitor Oseltamivir. Some of the mutations in HA are at or in the vicinity of antigenic sites and may therefore be of possible antigenic significance. Among these a D222G mutation in the HA receptor binding domain was found in two of the eight Indian isolates obtained from fatal cases.
The majority of the 13 Indian isolates grouped in the globally most widely circulating H1N1pdm clade 7. Further, correlations of the mutations specific to clade 7 Indian isolates to viral fitness and adaptability in the country remains to be understood. The D222G mutation in HA from isolates of fatal cases needs to be studied for pathogenicity.
Url:
DOI: 10.1371/journal.pone.0009693
PubMed: 20300625
PubMed Central: 2837743
Affiliations:
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Jadhav</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Mullick, Jayati" sort="Mullick, Jayati" uniqKey="Mullick J" first="Jayati" last="Mullick">Jayati Mullick</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Cherian, Sarah S" sort="Cherian, Sarah S" uniqKey="Cherian S" first="Sarah S." last="Cherian">Sarah S. Cherian</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Mishra, Akhilesh C" sort="Mishra, Akhilesh C" uniqKey="Mishra A" first="Akhilesh C." last="Mishra">Akhilesh C. 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Potdar</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Chadha, Mandeep S" sort="Chadha, Mandeep S" uniqKey="Chadha M" first="Mandeep S." last="Chadha">Mandeep S. Chadha</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Jadhav, Santosh M" sort="Jadhav, Santosh M" uniqKey="Jadhav S" first="Santosh M." last="Jadhav">Santosh M. Jadhav</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Mullick, Jayati" sort="Mullick, Jayati" uniqKey="Mullick J" first="Jayati" last="Mullick">Jayati Mullick</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Cherian, Sarah S" sort="Cherian, Sarah S" uniqKey="Cherian S" first="Sarah S." last="Cherian">Sarah S. Cherian</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author><author><name sortKey="Mishra, Akhilesh C" sort="Mishra, Akhilesh C" uniqKey="Mishra A" first="Akhilesh C." last="Mishra">Akhilesh C. Mishra</name><affiliation><nlm:aff id="aff1"></nlm:aff></affiliation></author></analytic><series><title level="j">PLoS ONE</title><idno type="eISSN">1932-6203</idno><imprint><date when="2010">2010</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en"><sec><title>Background</title><p>The Influenza A pandemic H1N1 2009 (H1N1pdm) virus appeared in India in May 2009 and thereafter outbreaks with considerable morbidity and mortality have been reported from many parts of the country. Continuous monitoring of the genetic makeup of the virus is essential to understand its evolution within the country in relation to global diversification and to track the mutations that may affect the behavior of the virus.</p></sec><sec><title>Methods</title><p>H1N1pdm viruses were isolated from both recovered and fatal cases representing major cities and sequenced. Phylogenetic analyses of six concatenated whole genomes and the hemagglutinin (HA) gene of seven more isolates from May-September 2009 was performed with reference to 685 whole genomes of global isolates available as of November 24, 2009. Molecular characterization of all the 8 segments was carried out for known pathogenic markers.</p></sec><sec><title>Results</title><p>The first isolate of May 2009 belonged to clade 5. Although clade 7 was the dominant H1N1pdm lineage in India, both clades 6 and 7 were found to be co-circulating. The neuraminidase of all the Indian isolates possessed H275, the marker for sensitivity to the neuraminidase inhibitor Oseltamivir. Some of the mutations in HA are at or in the vicinity of antigenic sites and may therefore be of possible antigenic significance. Among these a D222G mutation in the HA receptor binding domain was found in two of the eight Indian isolates obtained from fatal cases.</p></sec><sec><title>Conclusions</title><p>The majority of the 13 Indian isolates grouped in the globally most widely circulating H1N1pdm clade 7. Further, correlations of the mutations specific to clade 7 Indian isolates to viral fitness and adaptability in the country remains to be understood. The D222G mutation in HA from isolates of fatal cases needs to be studied for pathogenicity.</p></sec></div></front><back><div1 type="bibliography"><listBibl><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct></biblStruct><biblStruct><analytic><author><name sortKey="Reid, Eh" uniqKey="Reid E">EH Reid</name></author><author><name sortKey="Fanning, Tg" uniqKey="Fanning T">TG Fanning</name></author><author><name sortKey="Hultin, Jv" uniqKey="Hultin J">JV Hultin</name></author><author><name sortKey="Taubenberger, Jk" uniqKey="Taubenberger J">JK Taubenberger</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Kibourne, Ed" uniqKey="Kibourne E">ED Kibourne</name></author></analytic></biblStruct><biblStruct><analytic><author><name sortKey="Garten, Rj" uniqKey="Garten R">RJ Garten</name></author><author><name sortKey="Davis, Ct" uniqKey="Davis C">CT Davis</name></author><author><name sortKey="Russell, Ca" uniqKey="Russell 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Chadha</name><name sortKey="Cherian, Sarah S" sort="Cherian, Sarah S" uniqKey="Cherian S" first="Sarah S." last="Cherian">Sarah S. Cherian</name><name sortKey="Jadhav, Santosh M" sort="Jadhav, Santosh M" uniqKey="Jadhav S" first="Santosh M." last="Jadhav">Santosh M. Jadhav</name><name sortKey="Mishra, Akhilesh C" sort="Mishra, Akhilesh C" uniqKey="Mishra A" first="Akhilesh C." last="Mishra">Akhilesh C. Mishra</name><name sortKey="Mullick, Jayati" sort="Mullick, Jayati" uniqKey="Mullick J" first="Jayati" last="Mullick">Jayati Mullick</name><name sortKey="Potdar, Varsha A" sort="Potdar, Varsha A" uniqKey="Potdar V" first="Varsha A." last="Potdar">Varsha A. Potdar</name></noCountry></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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