<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>0120-548X</journal-id>
<journal-title><![CDATA[Acta Biológica Colombiana]]></journal-title>
<abbrev-journal-title><![CDATA[Acta biol.Colomb.]]></abbrev-journal-title>
<issn>0120-548X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional de Colombia, Facultad de Ciencias, Departamento de Biología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0120-548X2019000300503</article-id>
<article-id pub-id-type="doi">10.15446/abc.v24n3.79351</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[CELL CULTURE ISOLATION OF HEPATITIS E VIRUS GENOTYPE 3 STRAIN OBTAINED FROM HUMAN FECES]]></article-title>
<article-title xml:lang="es"><![CDATA[Aislamiento de una cepa genotipo 3 del virus de la hepatitis E obtenida de heces humanas]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[QUINTERO-GIL]]></surname>
<given-names><![CDATA[Carolina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MIRAZO]]></surname>
<given-names><![CDATA[Santiago]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[PARRA-SUESCÚN]]></surname>
<given-names><![CDATA[Jaime]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[LÓPEZ-HERRERA]]></surname>
<given-names><![CDATA[Albeiro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[MAINARDI]]></surname>
<given-names><![CDATA[Victoria]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[ARBIZA]]></surname>
<given-names><![CDATA[Juan]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[ORDÚZ]]></surname>
<given-names><![CDATA[Sergio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional de Colombia Sede Medellín  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad de la República  ]]></institution>
<addr-line><![CDATA[Montevideo ]]></addr-line>
<country>Uruguay</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Universidad Nacional de Colombia Sede Medellín  ]]></institution>
<addr-line><![CDATA[Medellín ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Hospital Central de las Fuerzas Armadas  ]]></institution>
<addr-line><![CDATA[Montevideo ]]></addr-line>
<country>Uruguay</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2019</year>
</pub-date>
<volume>24</volume>
<numero>3</numero>
<fpage>503</fpage>
<lpage>508</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-548X2019000300503&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-548X2019000300503&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-548X2019000300503&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Hepatitis E virus (HEV) is considered one of the leading causes of acute viral hepatitis worldwide, and about 20 million infections and approximately 57 000 deaths occurred every year. However, little is known about the replicative virus cycle due to the absence of a consensus cell culture model. A549 cell line is considered susceptible to HEV genotype 3, however, both viral strain and cell culture conditions could affect the viral isolation in vitro. The objective of this work was to isolate in vitro an HEV-3 strain obtained from human feces. To this, a genotype 3 HEV strain previously identified by genetic characterization was inoculated in A549 monolayers, and incubated for two hours at 37 °C. Five days post-infection, cells were passaged (subcultured) for the first time, and serial passages were done on average every four days during 41 days. HEV replication was evaluated through RT-qPCR in each passage, and reinfection of the cell line with the viral progeny derived from A549 infected monolayers was assessed through immunofluorescence and RT-qPCR. Viral RNA was detected in each passage from infected monolayers, and the highest amount was found after 26 days (2 x 106 copies/µL). In reinfection assay, capsid antigen was detected perinuclearly and forming foci, and 1x104 copies/µL of viral RNA was detected after 96 hours post infection. This shows that HEV recovered from the cell lysate monolayers was infectious. This viral isolate offers a critical tool to study the unknown aspect of HEV infection.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN El virus de la hepatitis E (HEV) se considera como una de las principales causas de hepatitis viral aguda en el mundo; cada año ocurren aproximadamente 20 millones de infecciones y 57 000 muertes. Debido a la ausencia de un modelo de cultivo celular consenso, se sabe poco sobre el ciclo replicativo del virus. La línea celular A549 se considera susceptible al genotipo 3 de HEV, pero tanto la cepa viral como las condiciones del cultivo celular podrían afectar el aislamiento viral in vitro. Por tanto nos propusimos aislar in vitro una cepa genotipo 3 del HEV. Para ello, se inocularon células A549 con una cepa HEV-3 identificada previamente por caracterización genética, y se incubó durante dos horas a 37 °C. Cinco días después de la infección, las células se pasaron (subcultivaron) por primera vez, y se realizaron pases seriados cada cuatro días en promedio, durante 41 días. En cada pase se evalúo la replicación del HEV mediante RT-qPCR. La reinfección de la línea celular con progenie viral derivada de monocapas de A549 infectadas se evaluó mediante inmunofluorescencia y RT-qPCR. Se detectó ARN viral en cada pase a partir de monocapas, y el pico máximo se alcanzó a los 26 días post infección (2 x 106 copias/µL). En el ensayo de reinfección, se detectó antígeno de cápside perinuclearmente y formando focos, y se detectaron 1 x 104 copias/µL de RNA viral a las 96 horas post infección. El HEV recuperado de lisado de monocapas fue infeccioso. Este aislado viral ofrece una herramienta importante para estudiar aspectos desconocidos de la infección por HEV.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[A549 cells]]></kwd>
<kwd lng="en"><![CDATA[hepevirus]]></kwd>
<kwd lng="en"><![CDATA[isolation]]></kwd>
<kwd lng="en"><![CDATA[RNA virus]]></kwd>
<kwd lng="es"><![CDATA[Aislamiento]]></kwd>
<kwd lng="es"><![CDATA[células A549]]></kwd>
<kwd lng="es"><![CDATA[hepevirus]]></kwd>
<kwd lng="es"><![CDATA[virus ARN]]></kwd>
</kwd-group>
</article-meta>
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