<?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>S0120-548X2018000100080</article-id>
<article-id pub-id-type="doi">10.15446/abc.v23n1.63487</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[INTEGRACIÓN, CARGA VIRAL Y NIVELES DE ARN MENSAJERO DE E2 DE VPH 16 EN LA PROGRESIÓN DE LESIONES INTRAEPITELIALES CERVICALES]]></article-title>
<article-title xml:lang="en"><![CDATA[Integration, Viral Charge and E2 mRNA Levels in the Progresion of Intraepitelial Cervical Lesions]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[TRUJILLO]]></surname>
<given-names><![CDATA[Esperanza]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[SÁNCHEZ]]></surname>
<given-names><![CDATA[Ricardo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[BRAVO]]></surname>
<given-names><![CDATA[María Mercedes]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Nacional de Cancerología Grupo de Investigación en Biología del Cáncer ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Nacional de Cancerología Grupo de Investigación Clínica ]]></institution>
<addr-line><![CDATA[Bogotá ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>04</month>
<year>2018</year>
</pub-date>
<volume>23</volume>
<numero>1</numero>
<fpage>80</fpage>
<lpage>87</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0120-548X2018000100080&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0120-548X2018000100080&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0120-548X2018000100080&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Entre las lesiones intraepiteliales escamosas cervicales (LIE) es importante distinguir aquellas asociadas con mayor riesgo de cáncer de cuello uterino. El objetivo de este trabajo fue evaluar si los niveles de expresión de E2 del VPH16 en mujeres con LIE y con evidencia de integración viral se asocian con el grado de la lesión. Se analizaron 109 cepillados cervicales positivos para VPH 16 provenientes de 19 mujeres sin LIE, 45 mujeres con LIE de bajo grado (LIEBG) y 45 mujeres con LIE de alto grado (LIEAG). Se cuantificó el número de copias de ARNm de E2 y de los genes E2 y E6 mediante PCR en tiempo real para determinar la carga viral (E6) y la proporción E2/E6 para evaluar la integración viral. Se encontraron frecuencias similares de expresión de E2 en LEIBG y LEIAG 15/45 (33 %), la frecuencia en mujeres sin lesión fue menor 3/19 (15,8 %), todos los casos en los que se observó expresión del gen E2 tenían mezcla de ADN viral episomal e integrado. La carga viral aumentó significativamente a mayor grado de la lesión (&#961; =0,049), mientras que la proporción E2/E6 disminuyó (&#961;=0,049). El análisis ROC mostró una baja capacidad de los tres parámetros virales para distinguir entre lesiones de bajo y alto grado. En conclusión, aunque las lesiones con presencia de ADN viral mixto e integrado y expresión de E2 podrían estar en menor riesgo de progresión, y la carga viral y la integración se relacionaron con mayor gravedad de la lesión, su valor clínico como biomarcadores de LEIAG es limitado.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT It is important to distinguish among squamous intraepithelial lesions (SIL) those associated with increased risk cervical cancer. Our aim was to evaluate if the expression level of gen E2 in women with SIL and evidence of viral integration is associated to the grade of lesion. Cervical scrapes HPV16 positive from 19 women with normal histology, 45 women with low-grade SIL (LSIL) and 45 women with high-grade SIL (HSIL) were analyzed. Real-time PCR was used to quantify the mRNA of E2 and E2 and E6 genes to calculate viral load (E6) and the ratio E2/E6 to assess viral integration. Similar frequencies of E2 expression were found in LSIL and HSIL15/45 (33 %), the frequency in women without SIL was lower 3/19 (15.8 %), and all cases with E2 gene expression had mixed episomal and integrated viral DNA. The viral load increased significantly with the grade of SIL (&#961;= 0.049), while E2/E6 ratio decreased (&#961;=0.049). The ROC analysis showed low capacity of the three viral parameters analyzed to distinguish between low and high grade SIL. In conclusion although SIL with mixed and integrated viral DNA with E2 expression could be at lower risk of progression, and viral load and integration were associated with higher severity of the lesion, its clinical value as biomarkers of HSIL is limited.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[carga viral]]></kwd>
<kwd lng="es"><![CDATA[integración viral]]></kwd>
<kwd lng="es"><![CDATA[lesión intraepitelial escamosa de alto grado]]></kwd>
<kwd lng="es"><![CDATA[lesión intraepitelial escamosa de bajo grado]]></kwd>
<kwd lng="es"><![CDATA[reacción en cadena de la polimerasa en tiempo real]]></kwd>
<kwd lng="es"><![CDATA[virus del Papiloma Humano tipo 16]]></kwd>
<kwd lng="en"><![CDATA[human Papillomavirus 16]]></kwd>
<kwd lng="en"><![CDATA[HSIL]]></kwd>
<kwd lng="en"><![CDATA[LSIL]]></kwd>
<kwd lng="en"><![CDATA[real time polymerase chain reaction]]></kwd>
<kwd lng="en"><![CDATA[virus integration]]></kwd>
<kwd lng="en"><![CDATA[viral load]]></kwd>
</kwd-group>
</article-meta>
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