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La base molecular de la latencia en los virus humanos patógenos
M A Garcia-Blanco1, B R Cullen
1Section of Cell Growth, Regulation, and Oncogenesis, Duke University Medical Center, Durham, NC 27710.
Science (New York, N.Y.)
|November 8, 1991
Resumen
Los virus humanos como el virus del herpes simple establecen infecciones latentes debido a la falta de factores huésped para la expresión génica temprana. La reactivación ocurre cuando los factores de transcripción celular desencadenan la replicación viral.
Área de la Ciencia:
- Virología Virología.
- Biología Molecular Biología Molecular
- Inmunología Inmunología.
Sus antecedentes:
- Varios virus humanos establecen infecciones latentes en tipos específicos de células huésped.
- Comprender los mecanismos de latencia viral es crucial para el desarrollo de terapias antivirales.
Objetivo del estudio:
- Para investigar los mecanismos moleculares subyacentes a la latencia viral en los patógenos humanos.
- Para comparar la latencia en los virus eucariotas con la de los bacteriófagos.
Principales métodos:
- Análisis comparativo de los ciclos de replicación del virus del herpes simple, el virus de Epstein-Barr y el virus de la inmunodeficiencia humana.
- Examen de las interacciones huésped-patógeno durante las fases de infección latente.
Principales resultados:
- La latencia viral en los virus humanos se establece principalmente por la ausencia de factores huésped requeridos para la expresión genética viral temprana.
- La reactivación de la latencia es provocada por factores de transcripción celular que responden a estímulos externos, lo que lleva a la replicación lítica.
Conclusiones:
- La latencia viral humana difiere de la latencia de los bacteriófagos, que se basa en los represores codificados viralmente.
- La disponibilidad del factor huésped regula críticamente el cambio entre los ciclos de vida viral latente y lítico.
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