Phylogenetic analyses of influenza A (H1N1)pdm09 hemagglutinin gene during and after the pandemic event in Brazil
Identifieur interne : 000348 ( France/Analysis ); précédent : 000347; suivant : 000349Phylogenetic analyses of influenza A (H1N1)pdm09 hemagglutinin gene during and after the pandemic event in Brazil
Auteurs : Paola Cristina Resende [Brésil] ; Fernando Couto Motta [Brésil] ; Priscila Silva Born [Brésil] ; Daniela Machado [France] ; Braulia Costa Caetano [Brésil] ; David Brown [Brésil] ; Marilda Mendonça Siqueira [Brésil]Source :
- Infection, Genetics and Evolution [ 1567-1348 ] ; 2015-12.
English descriptors
Abstract
Pandemic influenza A H1N1 [A(H1N1)pdm09] was first detected in Brazil in May 2009, and spread extensively throughout the country causing a peak of infection during June to August 2009. Since then, it has continued to circulate with a seasonal pattern, causing high rates of morbidity and mortality. Over this period, the virus has continually evolved with the accumulation of new mutations. In this study we analyze the phylogenetic relationship in a collection of 220 A(H1N1)pdm09 hemagglutinin (HA) gene sequences collected during and after the pandemic period (2009 to 2014) in Brazil. In addition, we have looked for evidence of viral polymorphisms associated with severe disease and compared the range of viral variants with the vaccine strain (A/California/7/2009) used throughout this period. The phylogenetic analyses in this study revealed the circulation of at least eight genetic groups in Brazil. Two (G6-pdm and G7-pdm) co-circulated during the pandemic period, showing an early pattern of viral diversification with a low genetic distance from vaccine strain. Other phylogenetic groups, G5, G6 (including 6B, 6C and 6D subgroups), and G7 were found in the subsequent epidemic seasons from 2011 to 2014. These viruses exhibited more amino acid differences from the vaccine strain with several substitutions at the antigenic sites. This is associated with a theoretical decrease in the vaccine efficacy. Furthermore, we observed that the presence of any polymorphism at residue 222 of the HA gene was significantly associated with severe/fatal cases, reinforcing previous reports that described this residue as a potential virulence marker. This study provides new information about the circulation of some viral variants in Brazil, follows up potential genetic markers associated with virulence and allows infer if the efficacy of the current vaccine against more recent A(H1N1)pdm09 strains may be reduced.
Url:
DOI: 10.1016/j.meegid.2015.09.007
Affiliations:
- Brésil, France
- Auvergne-Rhône-Alpes, Rhône-Alpes
- Lyon
- Université Claude Bernard Lyon 1, Université de Lyon
Links toward previous steps (curation, corpus...)
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Hal:hal-01974418Le document en format XML
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<author><name sortKey="Born, Priscila Silva" sort="Born, Priscila Silva" uniqKey="Born P" first="Priscila Silva" last="Born">Priscila Silva Born</name>
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<author><name sortKey="Machado, Daniela" sort="Machado, Daniela" uniqKey="Machado D" first="Daniela" last="Machado">Daniela Machado</name>
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<orgName>École normale supérieure - Lyon</orgName>
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<ref type="url">http://www.ens-lyon.eu/</ref>
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<orgName>Université Claude Bernard Lyon 1</orgName>
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<orgName>Institut National de la Santé et de la Recherche Médicale</orgName>
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<desc> <address> <addrLine>101, rue de Tolbiac, 75013 Paris </addrLine>
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<orgName>Centre National de la Recherche Scientifique</orgName>
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<country>France</country>
<placeName><settlement type="city">Lyon</settlement>
<region type="region" nuts="2">Auvergne-Rhône-Alpes</region>
<region type="old region" nuts="2">Rhône-Alpes</region>
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<author><name sortKey="Caetano, Braulia Costa" sort="Caetano, Braulia Costa" uniqKey="Caetano B" first="Braulia Costa" last="Caetano">Braulia Costa Caetano</name>
<affiliation wicri:level="1"><hal:affiliation type="regrouplaboratory" xml:id="struct-338399" status="VALID"> <orgName>Fiocruz Minas - René Rachou Research Center / Instituto René Rachou</orgName>
<desc> <address> <addrLine>Augusto de Lima Avenue, 1715 Belo Horizonte, Minas Gerais - Brazil</addrLine>
<country key="BR"></country>
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<country>Brésil</country>
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<author><name sortKey="Brown, David" sort="Brown, David" uniqKey="Brown D" first="David" last="Brown">David Brown</name>
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<desc> <address> <addrLine>Augusto de Lima Avenue, 1715 Belo Horizonte, Minas Gerais - Brazil</addrLine>
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</address>
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</org>
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</hal:affiliation>
<country>Brésil</country>
</affiliation>
</author>
<author><name sortKey="Siqueira, Marilda Mendonca" sort="Siqueira, Marilda Mendonca" uniqKey="Siqueira M" first="Marilda Mendonça" last="Siqueira">Marilda Mendonça Siqueira</name>
<affiliation wicri:level="1"><hal:affiliation type="regrouplaboratory" xml:id="struct-338399" status="VALID"> <orgName>Fiocruz Minas - René Rachou Research Center / Instituto René Rachou</orgName>
<desc> <address> <addrLine>Augusto de Lima Avenue, 1715 Belo Horizonte, Minas Gerais - Brazil</addrLine>
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<desc> <address> <addrLine>Av. Brasil, 4365 - Manguinhos, Rio de Janeiro</addrLine>
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<desc> <address> <addrLine>25, rue du Dr Roux 75724 Paris Cedex 15</addrLine>
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<country>Brésil</country>
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</analytic>
<idno type="DOI">10.1016/j.meegid.2015.09.007</idno>
<series><title level="j">Infection, Genetics and Evolution</title>
<idno type="ISSN">1567-1348</idno>
<imprint><date type="datePub">2015-12</date>
</imprint>
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<profileDesc><textClass><keywords scheme="mix" xml:lang="en"><term>A(H1N1)pdm09</term>
<term>Hemagglutinin</term>
<term>Influenza</term>
<term>Phylogenetic analyses</term>
<term>Quasispecies</term>
<term>Sequencing</term>
</keywords>
</textClass>
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</teiHeader>
<front><div type="abstract" xml:lang="en"> <p>Pandemic influenza A H1N1 [A(H1N1)pdm09] was first detected in Brazil in May 2009, and spread extensively throughout the country causing a peak of infection during June to August 2009. Since then, it has continued to circulate with a seasonal pattern, causing high rates of morbidity and mortality. Over this period, the virus has continually evolved with the accumulation of new mutations. In this study we analyze the phylogenetic relationship in a collection of 220 A(H1N1)pdm09 hemagglutinin (HA) gene sequences collected during and after the pandemic period (2009 to 2014) in Brazil. In addition, we have looked for evidence of viral polymorphisms associated with severe disease and compared the range of viral variants with the vaccine strain (A/California/7/2009) used throughout this period. The phylogenetic analyses in this study revealed the circulation of at least eight genetic groups in Brazil. Two (G6-pdm and G7-pdm) co-circulated during the pandemic period, showing an early pattern of viral diversification with a low genetic distance from vaccine strain. Other phylogenetic groups, G5, G6 (including 6B, 6C and 6D subgroups), and G7 were found in the subsequent epidemic seasons from 2011 to 2014. These viruses exhibited more amino acid differences from the vaccine strain with several substitutions at the antigenic sites. This is associated with a theoretical decrease in the vaccine efficacy. Furthermore, we observed that the presence of any polymorphism at residue 222 of the HA gene was significantly associated with severe/fatal cases, reinforcing previous reports that described this residue as a potential virulence marker. This study provides new information about the circulation of some viral variants in Brazil, follows up potential genetic markers associated with virulence and allows infer if the efficacy of the current vaccine against more recent A(H1N1)pdm09 strains may be reduced.</p>
</div>
</front>
</TEI>
<affiliations><list><country><li>Brésil</li>
<li>France</li>
</country>
<region><li>Auvergne-Rhône-Alpes</li>
<li>Rhône-Alpes</li>
</region>
<settlement><li>Lyon</li>
</settlement>
<orgName><li>Université Claude Bernard Lyon 1</li>
<li>Université de Lyon</li>
</orgName>
</list>
<tree><country name="Brésil"><noRegion><name sortKey="Resende, Paola Cristina" sort="Resende, Paola Cristina" uniqKey="Resende P" first="Paola Cristina" last="Resende">Paola Cristina Resende</name>
</noRegion>
<name sortKey="Born, Priscila Silva" sort="Born, Priscila Silva" uniqKey="Born P" first="Priscila Silva" last="Born">Priscila Silva Born</name>
<name sortKey="Brown, David" sort="Brown, David" uniqKey="Brown D" first="David" last="Brown">David Brown</name>
<name sortKey="Caetano, Braulia Costa" sort="Caetano, Braulia Costa" uniqKey="Caetano B" first="Braulia Costa" last="Caetano">Braulia Costa Caetano</name>
<name sortKey="Motta, Fernando Couto" sort="Motta, Fernando Couto" uniqKey="Motta F" first="Fernando Couto" last="Motta">Fernando Couto Motta</name>
<name sortKey="Siqueira, Marilda Mendonca" sort="Siqueira, Marilda Mendonca" uniqKey="Siqueira M" first="Marilda Mendonça" last="Siqueira">Marilda Mendonça Siqueira</name>
</country>
<country name="France"><region name="Auvergne-Rhône-Alpes"><name sortKey="Machado, Daniela" sort="Machado, Daniela" uniqKey="Machado D" first="Daniela" last="Machado">Daniela Machado</name>
</region>
</country>
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</record>
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