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Identifying Dysregulated Genes Induced by Kaposi's Sarcoma-associated Herpesvirus (KSHV)
Published on: September 14, 2010
Mímico molecular de citoquinas humanas y genes de la vía de respuesta de citoquinas por KSHVV
P S Moore1, C Boshoff, R A Weiss
1School of Public Health, Columbia University, New York, NY 10032, USA.
Science (New York, N.Y.)
|December 6, 1996
Resumen
El herpesvirus asociado al sarcoma de Kaposi (KSHV) codifica las proteínas virales que imitan las proteínas inflamatorias de los macrófagos humanos (MIP) y la interleucina-6 (IL-6). Estos genes virales, incluido el vMIP-I, inhiben la replicación del VIH-1 y pueden contribuir a la neoplasia inducida por el virus.
Área de la Ciencia:
- Virología Virología.
- Inmunología Inmunología.
- Oncología Oncología.
Sus antecedentes:
- El genoma del herpesvirus asociado al sarcoma (KSHV) de Kaposi codifica proteínas análogas a las citocinas y quimiocinas humanas.
- Se han identificado homólogos virales de la proteína inflamatoria de los macrófagos (MIP), la interleucina-6 (IL-6) y el factor regulador del interferón (IRF) en KSHV.
Objetivo del estudio:
- Para investigar la función y la expresión de las proteínas virales codificadas por KSHV (vIL-6, vMIP-I).
- Evaluar el papel de estas proteínas virales en la evasión de la defensa del huésped y la posible contribución a las enfermedades asociadas con KSHV.
- Explorar la interacción entre KSHV y el VIH-1 a través de quimiocinas virales.
Principales métodos:
- Se utilizaron ensayos funcionales para evaluar la actividad de vIL-6 en la proliferación de B9.
- Se analizaron los patrones de expresión de vIL-6 en las células infectadas por KSHV y las lesiones del sarcoma de Kaposi (KS).
- Se realizaron estudios de transmisión del VIH-1 para evaluar los efectos inhibidores del vMIP-I en la replicación del VIH-1 dependiente del CCR5.
Principales resultados:
- La IL-6 viral (vIL-6) demostró funcionalidad en ensayos de proliferación celular B9.
- vIL-6 se expresó predominantemente en las células hematopoyéticas infectadas por KSHV, no típicamente en las lesiones de KS.
- El MIP-I viral (vMIP-I) exhibió una inhibición significativa de la replicación del VIH-1 dependiente del CCR5, similar a las quimiocinas del MIP humano.
Conclusiones:
- Las proteínas virales codificadas por KSHV, incluidas vIL-6 y vMIP-I, poseen funciones biológicas relevantes para las interacciones huésped-patógeno.
- La capacidad de vMIP-I para inhibir la replicación del VIH-1 sugiere un papel potencial en la modulación de la patogénesis viral y la coinfección.
- Estos genes virales pueden representar un mecanismo por el cual el KSHV elude las respuestas inmunes del huésped, contribuyendo a la neoplasia e influyendo en las interacciones KSHV-HIV-1.
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