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• W2966722532 abstract "The main cause of cervical cancer is an infection of keratinocytes in the basal layer of the stratified epithelium of the cervix by human papillomavirus (HPV). Other than in cervical samples, HPV DNA has been found in serum and other fluids but its origin is unclear. Extracellular vesicles (EV) could be a conveyance of viral DNA given their emerging role in cellular communication. The content of EV derived from cervical cells has not been properly explored and it is not known whether or not they contain HPV DNA. We evaluated the DNA content of exosomes purified from cultures of HeLa cells by Next Generation Sequencing (NGS) and confirmed its presence by PCR. The presence of HPV DNA was also evaluated by PCR and NGS in EV from HPV-positive cervical samples without apparent lesion or with LSIL. We detected the integrated form of viral-DNA in exosomes from HeLa cells by NGS and confirmed its presence by PCR. The search for HPV sequences in EV obtained from cervical exudate samples without apparent lesion or with LSIL, where we expected to find the viral genome as an episome, indicated that HPV DNA, including the E6 and E7 oncogenes, is present in these EV. HPV DNA, including the viral oncogenes E6/E7, is found in exosomes regardless of the integration status of the virus in the infected cell. La principal causa del cáncer de cérvix es la infección de los queratinocitos de la capa basal del epitelio estratificado del cuello uterino por el virus del papiloma humano (VPH). El ADN del VPH se ha encontrado en muestras cervicales, pero también en suero y otros fluidos, aunque su origen en estos últimos no está claro. Las vesículas extracelulares (VE) podrían ser el medio de transporte del ADN viral considerando su papel emergente en la comunicación celular. El contenido de las VE derivadas de células cervicales ha sido poco explorado y la presencia en ellas de ADN de VPH sigue siendo desconocida. Evaluamos el ADN de exosomas purificados a partir de cultivos de células HeLa mediante secuenciación de nueva generación (NGS) y confirmamos su presencia a través de PCR. La presencia de ADN de VPH también se evaluó mediante PCR y NGS en VE de muestras cervicales positivas a VPH, sin lesión aparente o con LSIL. Detectamos la forma integrada del ADN viral en exosomas de células HeLa mediante NGS, y confirmamos su presencia a través de PCR. La búsqueda de secuencias de VPH en VE obtenidas a partir de muestras de exudado cervical sin lesión aparente o con LSIL, donde esperamos encontrar el genoma viral en forma episomal, indicó que el DNA de VPH incluyendo los oncogenes E6 y E7, está presente en estas VE. El ADN del VPH incluyendo el correspondiente con los oncogenes virales E6/E7 se encuentra en exosomas independientemente del estado de integración del virus en la célula infectada." @default.
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• W2966722532 date "2020-04-01" @default.
• W2966722532 modified "2023-10-18" @default.
• W2966722532 title "Presence of HPV DNA in extracellular vesicles from HeLa cells and cervical samples" @default.
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• W2966722532 doi "https://doi.org/10.1016/j.eimc.2019.06.011" @default.
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