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Single Cell Micro-aspiration as an Alternative Strategy to Fluorescence-activated Cell Sorting for Giant Virus Mixture Separation
Published on: October 27, 2019
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Integración del genoma del huésped y reactivación inducida por el virus gigante del virófago mavirus
Matthias G Fischer1, Thomas Hackl1
1Department of Biomolecular Mechanisms, Max Planck Institute for Medical Research, 69120 Heidelberg, Germany.
Nature
|December 9, 2016
Resumen
Un protozoario marino
Área de la Ciencia:
- Virología
- La genómica
- Microbiología marina
Sus antecedentes:
- Los genomas eucariotas contienen elementos virales endógenos con orígenes y funciones desconocidas.
- Los virófagos son virus que infectan a otros virus, específicamente a los virus gigantes.
- El protozoario marino Cafeteria roenbergensis alberga el virus gigante CroV.
Objetivo del estudio:
- Investigar la integración y la función del virus virófago dentro del genoma de Cafeteria roenbergensis.
- Comprender la dinámica de las interacciones entre mavirus y CroV y su impacto en la defensa del huésped.
Principales métodos:
- Análisis genómico para identificar los sitios de integración de mavirus.
- Estudios de expresión génica para determinar la activación de los provirófagos.
- Experimentos de infección para evaluar los mecanismos de defensa antivirales.
Principales resultados:
- Mavirus se integra fácilmente en el genoma nuclear de Cafeteria roenbergensis, parecido a los transposones de ADN.
- Los genes provirófagos son inducidos por la superinfección de CroV, produciendo mavirus infecciosos.
- Las células portadoras de provirófagos no están directamente protegidas, pero liberan el mavirus durante la lisis, suprimiendo el CroV y mejorando la supervivencia del huésped en infecciones posteriores.
Conclusiones:
- El mavirus endógeno actúa como un sistema de defensa antiviral inducible en el Cafeteria roenbergensis.
- Esta interacción huésped-parásito implica un comportamiento altruista, con una relevancia ecológica potencial en las poblaciones de protistas.
- La activación de los provirófagos inducida por el virus gigante puede representar una estrategia antiviral significativa en las comunidades microbianas marinas.
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