Influenza A H1N1pdm 2009 Virus in Paraguay: Nucleotide Point Mutations in Hemagglutinin and Neuraminidase Genes are not Associated with Drug Resistance
Identifieur interne : 000A93 ( Ncbi/Merge ); précédent : 000A92; suivant : 000A94Influenza A H1N1pdm 2009 Virus in Paraguay: Nucleotide Point Mutations in Hemagglutinin and Neuraminidase Genes are not Associated with Drug Resistance
Auteurs : Emilio E. Espínola [Paraguay] ; Alberto A. Amarilla [Paraguay, Brésil] ; Magaly Martínez [Paraguay] ; Víctor H. Aquino [Brésil] ; Graciela Russomando [Paraguay]Source :
- The Open Virology Journal [ 1874-3579 ] ; 2014.
Abstract
Influenza virus is associated with upper respiratory tract infections. The fourth influenza pandemic was declared in 2009. The aim of this study was to determine the genetic variability of the 2009 H1N1 pandemic virus circulating in Paraguay. Nasal swabs were collected from 181 patients with flu symptoms managed at the Hospital of the Medical School in Asunción, Paraguay, between August and October 2009. Virus detection was carried out by real-time reverse transcription-polymerase chain reaction, followed by sequencing of the hemagglutinin and neuraminidase genes, and phylogenetic analysis. H1N1pdm09 was detected in 14.9% (27/181) of the suspected cases. Analysis of 13 samples showed that these viruses the clustered in a single genetic group. Neither the mutation related to exacerbation of disease (D239G in hemagglutinin) nor that related to antiviral resistance (H275Y in neuraminidase), both detected in neighboring countries, were found. This genetic analysis of H1N1pdm09 will help to understand the spread of the disease.
Url:
DOI: 10.2174/1874357901408010009
PubMed: 25328558
PubMed Central: 4200701
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PMC:4200701Le document en format XML
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<front><div type="abstract" xml:lang="en"><p>Influenza virus is associated with upper respiratory tract infections. The fourth influenza pandemic was declared in 2009. The aim of this study was to determine the genetic variability of the 2009 H1N1 pandemic virus circulating in Paraguay. Nasal swabs were collected from 181 patients with flu symptoms managed at the Hospital of the Medical School in Asunción, Paraguay, between August and October 2009. Virus detection was carried out by real-time reverse transcription-polymerase chain reaction, followed by sequencing of the hemagglutinin and neuraminidase genes, and phylogenetic analysis. H1N1pdm09 was detected in 14.9% (27/181) of the suspected cases. Analysis of 13 samples showed that these viruses the clustered in a single genetic group. Neither the mutation related to exacerbation of disease (D239G in hemagglutinin) nor that related to antiviral resistance (H275Y in neuraminidase), both detected in neighboring countries, were found. This genetic analysis of H1N1pdm09 will help to understand the spread of the disease.</p>
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<front><journal-meta><journal-id journal-id-type="nlm-ta">Open Virol J</journal-id>
<journal-id journal-id-type="iso-abbrev">Open Virol J</journal-id>
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<title-group><article-title>Influenza A H1N1pdm 2009 Virus in Paraguay: Nucleotide Point Mutations in Hemagglutinin and Neuraminidase Genes are not Associated with Drug Resistance</article-title>
</title-group>
<contrib-group><contrib contrib-type="author"><name><surname>Espínola</surname>
<given-names>Emilio E</given-names>
</name>
<xref ref-type="corresp" rid="cor1">*</xref>
<xref ref-type="aff" rid="aff1">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Amarilla</surname>
<given-names>Alberto A</given-names>
</name>
<xref ref-type="aff" rid="aff1">1</xref>
<xref ref-type="aff" rid="aff2">2</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Martínez</surname>
<given-names>Magaly</given-names>
</name>
<xref ref-type="aff" rid="aff1">1</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Aquino</surname>
<given-names>Víctor H</given-names>
</name>
<xref ref-type="aff" rid="aff2">2</xref>
</contrib>
<contrib contrib-type="author"><name><surname>Russomando</surname>
<given-names>Graciela</given-names>
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<xref ref-type="aff" rid="aff1">1</xref>
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<aff id="aff1"><label>1</label>
Departamento de Biología Molecular y Genética, Instituto de Investigaciones en Ciencias de la Salud, Universidad Nacional de Asunción, Paraguay</aff>
<aff id="aff2"><label>2</label>
Departamento de Análises Clínicas, Toxicológicas e Bromatológicas, Faculdade de Ciências Farmacêuticas, Universidade de São Paulo, Ribeirão Preto, SP, Brazil</aff>
<author-notes><corresp id="cor1"><label>*</label>
Address correspondence to this author at the Rio de la Plata y Lagerenza, CP1120, Asunción, Paraguay; Tel: +595 21 424 520; Fax: +595 21 480 185;
E-mail: <email xlink:href="emilioespinola@hotmail.com">emilioespinola@hotmail.com</email>
</corresp>
</author-notes>
<pub-date pub-type="epub"><day>29
</day>
<month>9</month>
<year>2014</year>
</pub-date>
<pub-date pub-type="collection"><year>2014</year>
</pub-date>
<volume>8</volume>
<fpage>9</fpage>
<lpage>13</lpage>
<history><date date-type="received"><day>13</day>
<month>6</month>
<year>2014</year>
</date>
<date date-type="rev-recd"><day>15</day>
<month>7</month>
<year>2014</year>
</date>
<date date-type="accepted"><day>18</day>
<month>7</month>
<year>2014</year>
</date>
</history>
<permissions><copyright-statement>© Bobardt <italic>et al.</italic>
; Licensee <italic>Bentham Open.</italic>
</copyright-statement>
<copyright-year>2014</copyright-year>
<copyright-holder>Bobardt</copyright-holder>
<license license-type="open-access" xlink:href="http://creativecommons.org/licenses/by-nc/3.0/"><license-p>This is an open access article licensed under the terms of the Creative Commons Attribution Non-Commercial License (<uri xlink:type="simple" xlink:href="http://creativecommons.org/licenses/by-nc/3.0/">http://creativecommons.org/licenses/by-nc/3.0/</uri>
) which permits unrestricted, non-commercial use, distribution and reproduction in any medium, provided the work is properly cited.</license-p>
</license>
</permissions>
<abstract><p>Influenza virus is associated with upper respiratory tract infections. The fourth influenza pandemic was declared in 2009. The aim of this study was to determine the genetic variability of the 2009 H1N1 pandemic virus circulating in Paraguay. Nasal swabs were collected from 181 patients with flu symptoms managed at the Hospital of the Medical School in Asunción, Paraguay, between August and October 2009. Virus detection was carried out by real-time reverse transcription-polymerase chain reaction, followed by sequencing of the hemagglutinin and neuraminidase genes, and phylogenetic analysis. H1N1pdm09 was detected in 14.9% (27/181) of the suspected cases. Analysis of 13 samples showed that these viruses the clustered in a single genetic group. Neither the mutation related to exacerbation of disease (D239G in hemagglutinin) nor that related to antiviral resistance (H275Y in neuraminidase), both detected in neighboring countries, were found. This genetic analysis of H1N1pdm09 will help to understand the spread of the disease.</p>
</abstract>
<kwd-group><title>Keywords</title>
<kwd>Hemagglutinin</kwd>
<kwd>pandemic influenza H1N1 2009</kwd>
<kwd>neuraminidase</kwd>
<kwd>respiratory disease</kwd>
<kwd>swine flu.</kwd>
</kwd-group>
</article-meta>
</front>
<floats-group><fig id="F1" position="float"><label>Fig. (1)</label>
<caption><p>Phylogenetic trees corresponding to complete coding nucleotide sequences for the
(<bold>A</bold>
) HA and (<bold>B</bold>
) NA genes, respectively, each comparing all known
subtypes, four worldwide H1N1pdm09 strains (randomly selected), 13 Paraguayan
isolates, and the vaccine strain A/California/07/2009. Each sequence is
indicated with its GenBank accession number, host of origin (omitted for human
strains), geographical origin, name of isolate, and year of isolation. Bootstrap
values greater than 70%are shown at branch nodes. Paraguayan isolates are shown
with a filled circle. Branch distances are indicated by a scale bar (0.02 nt
substitution per site) at the bottom of each tree.
</p>
</caption>
<graphic xlink:href="TOVJ-8-9_F1"></graphic>
</fig>
<table-wrap id="T1" position="float"><label>Table 1.</label>
<caption><p>Primers used for complete amplification of the HA and NA coding sequences.</p>
</caption>
<table frame="border" rules="all" width="100%"><thead><tr><th align="center" rowspan="1" colspan="1"><bold>Primer</bold>
</th>
<th align="center" rowspan="1" colspan="1"><bold>Gene</bold>
</th>
<th align="center" rowspan="1" colspan="1"><bold>Position*</bold>
</th>
<th align="center" rowspan="1" colspan="1"><bold>Sense</bold>
</th>
<th align="center" rowspan="1" colspan="1"><bold>Sequence (5' → 3')</bold>
</th>
</tr>
</thead>
<tbody><tr><td align="center" rowspan="1" colspan="1">ha 635</td>
<td align="center" rowspan="1" colspan="1">HA</td>
<td align="center" rowspan="1" colspan="1">-40 to -22</td>
<td align="center" rowspan="1" colspan="1">Forward</td>
<td align="center" rowspan="1" colspan="1">ATACGACTAGCAAAAGCAGGGG </td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">ha 635'</td>
<td align="center" rowspan="1" colspan="1">HA</td>
<td align="center" rowspan="1" colspan="1">574 to 595</td>
<td align="center" rowspan="1" colspan="1">Reverse</td>
<td align="center" rowspan="1" colspan="1">GATGGTGAATGCCCCATAGCAC</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">ha 864</td>
<td align="center" rowspan="1" colspan="1">HA</td>
<td align="center" rowspan="1" colspan="1">514 to 532</td>
<td align="center" rowspan="1" colspan="1">Forward</td>
<td align="center" rowspan="1" colspan="1">GGAAATTCATACCCAAAGC</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">ha 864'</td>
<td align="center" rowspan="1" colspan="1">HA</td>
<td align="center" rowspan="1" colspan="1">1,356 to 1,377</td>
<td align="center" rowspan="1" colspan="1">Reverse</td>
<td align="center" rowspan="1" colspan="1">CACATTTGAATCGTGGTAGTCC</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">ha 813</td>
<td align="center" rowspan="1" colspan="1">HA</td>
<td align="center" rowspan="1" colspan="1">938 to 962</td>
<td align="center" rowspan="1" colspan="1">Forward</td>
<td align="center" rowspan="1" colspan="1">ATCCGATCACAATTGGAAAATGTCC </td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">ha 813'</td>
<td align="center" rowspan="1" colspan="1">HA</td>
<td align="center" rowspan="1" colspan="1">1,727 to 1,750</td>
<td align="center" rowspan="1" colspan="1">Reverse</td>
<td align="center" rowspan="1" colspan="1">GTGTCAGTAGAAACAAGGGTGTTT</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">na 584</td>
<td align="center" rowspan="1" colspan="1">NA</td>
<td align="center" rowspan="1" colspan="1">-20 to -6</td>
<td align="center" rowspan="1" colspan="1">Forward</td>
<td align="center" rowspan="1" colspan="1">AGCAAAAGCAGGAGT </td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">na 584'</td>
<td align="center" rowspan="1" colspan="1">NA</td>
<td align="center" rowspan="1" colspan="1">545 to 564</td>
<td align="center" rowspan="1" colspan="1">Reverse</td>
<td align="center" rowspan="1" colspan="1">GATGCCATCATGACAAGCAC</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">na 681</td>
<td align="center" rowspan="1" colspan="1">NA</td>
<td align="center" rowspan="1" colspan="1">466 to 485</td>
<td align="center" rowspan="1" colspan="1">Forward</td>
<td align="center" rowspan="1" colspan="1">CGAACCCTAATGAGCTGTCC</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">na 681'</td>
<td align="center" rowspan="1" colspan="1">NA</td>
<td align="center" rowspan="1" colspan="1">1,126 to 1,146</td>
<td align="center" rowspan="1" colspan="1">Reverse</td>
<td align="center" rowspan="1" colspan="1">CCCAGTCCATCCGTTCGGATC</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">na 473</td>
<td align="center" rowspan="1" colspan="1">NA</td>
<td align="center" rowspan="1" colspan="1">966 to 988</td>
<td align="center" rowspan="1" colspan="1">Forward</td>
<td align="center" rowspan="1" colspan="1">CGGAGACAATCCACGCCCTAATG</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">na 473'</td>
<td align="center" rowspan="1" colspan="1">NA</td>
<td align="center" rowspan="1" colspan="1">1,424 to 1,438</td>
<td align="center" rowspan="1" colspan="1">Reverse</td>
<td align="center" rowspan="1" colspan="1">AGTAGAAACAAGGAG</td>
</tr>
</tbody>
</table>
<table-wrap-foot><fn id="T1F1"><label>*</label>
<p>Nucleotide positions are based on the H1N1pdm 09 vaccine strain A/California/07/2009.</p>
</fn>
</table-wrap-foot>
</table-wrap>
<table-wrap id="T2" position="float"><label>Table 2.</label>
<caption><p>Expected and observed amino acid mutations for the
HA and NA genes found in this study.
</p>
</caption>
<table frame="border" rules="all" width="100%"><thead><tr><th align="center" rowspan="1" colspan="1"><bold>Mutation*</bold>
</th>
<th align="center" rowspan="1" colspan="1"><bold>Gene</bold>
</th>
<th align="center" rowspan="1" colspan="1"><bold>Percentage (Expected)**</bold>
</th>
<th align="center" rowspan="1" colspan="1"><bold>Percentage (Observed)</bold>
</th>
</tr>
</thead>
<tbody><tr><td align="center" rowspan="1" colspan="1">S101N</td>
<td align="center" rowspan="1" colspan="1">HA</td>
<td align="center" rowspan="1" colspan="1">0.2%</td>
<td align="center" rowspan="1" colspan="1">0.0%</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">S220T</td>
<td align="center" rowspan="1" colspan="1">HA</td>
<td align="center" rowspan="1" colspan="1">76.7%</td>
<td align="center" rowspan="1" colspan="1">100%</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">D239E</td>
<td align="center" rowspan="1" colspan="1">HA</td>
<td align="center" rowspan="1" colspan="1">5.5%</td>
<td align="center" rowspan="1" colspan="1">0.0%</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">D239G</td>
<td align="center" rowspan="1" colspan="1">HA</td>
<td align="center" rowspan="1" colspan="1">2.6%</td>
<td align="center" rowspan="1" colspan="1">0.0%</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">N387H</td>
<td align="center" rowspan="1" colspan="1">HA</td>
<td align="center" rowspan="1" colspan="1">1.7%</td>
<td align="center" rowspan="1" colspan="1">0.0%</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">E391K</td>
<td align="center" rowspan="1" colspan="1">HA</td>
<td align="center" rowspan="1" colspan="1">15.6%</td>
<td align="center" rowspan="1" colspan="1">30.8%</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">V106I</td>
<td align="center" rowspan="1" colspan="1">NA</td>
<td align="center" rowspan="1" colspan="1">85.1%</td>
<td align="center" rowspan="1" colspan="1">100%</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">D199N</td>
<td align="center" rowspan="1" colspan="1">NA</td>
<td align="center" rowspan="1" colspan="1">0.3%</td>
<td align="center" rowspan="1" colspan="1">0.0%</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">I223R</td>
<td align="center" rowspan="1" colspan="1">NA</td>
<td align="center" rowspan="1" colspan="1">0.2%</td>
<td align="center" rowspan="1" colspan="1">0.0%</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">N248D</td>
<td align="center" rowspan="1" colspan="1">NA</td>
<td align="center" rowspan="1" colspan="1">85.9%</td>
<td align="center" rowspan="1" colspan="1">100%</td>
</tr>
<tr><td align="center" rowspan="1" colspan="1">H275Y</td>
<td align="center" rowspan="1" colspan="1">NA</td>
<td align="center" rowspan="1" colspan="1">2.0%</td>
<td align="center" rowspan="1" colspan="1">0.0%</td>
</tr>
</tbody>
</table>
<table-wrap-foot><fn id="T2F1"><label>*</label>
<p>Amino acid positions are based on the H1N1pdm 09 vaccine strain A/California/07/2009.</p>
</fn>
<fn id="T2F2"><label>**</label>
<p>Expected percentage of mutations for the HA and NA genes, based on published worldwide data [14].</p>
</fn>
</table-wrap-foot>
</table-wrap>
</floats-group>
</pmc>
<affiliations><list><country><li>Brésil</li>
<li>Paraguay</li>
</country>
<region><li>État de São Paulo</li>
</region>
<settlement><li>São Paulo</li>
</settlement>
<orgName><li>Université de São Paulo</li>
</orgName>
</list>
<tree><country name="Paraguay"><noRegion><name sortKey="Espinola, Emilio E" sort="Espinola, Emilio E" uniqKey="Espinola E" first="Emilio E" last="Espínola">Emilio E. Espínola</name>
</noRegion>
<name sortKey="Amarilla, Alberto A" sort="Amarilla, Alberto A" uniqKey="Amarilla A" first="Alberto A" last="Amarilla">Alberto A. Amarilla</name>
<name sortKey="Martinez, Magaly" sort="Martinez, Magaly" uniqKey="Martinez M" first="Magaly" last="Martínez">Magaly Martínez</name>
<name sortKey="Russomando, Graciela" sort="Russomando, Graciela" uniqKey="Russomando G" first="Graciela" last="Russomando">Graciela Russomando</name>
</country>
<country name="Brésil"><region name="État de São Paulo"><name sortKey="Amarilla, Alberto A" sort="Amarilla, Alberto A" uniqKey="Amarilla A" first="Alberto A" last="Amarilla">Alberto A. Amarilla</name>
</region>
<name sortKey="Aquino, Victor H" sort="Aquino, Victor H" uniqKey="Aquino V" first="Víctor H" last="Aquino">Víctor H. Aquino</name>
</country>
</tree>
</affiliations>
</record>
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