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La complejidad de la oncogénesis por el virus de la leucemia bovina
Florine Doucet1,2, Alexis Fontaine1,2, Malik Hamaidia1,2
1Molecular and Cellular Epigenetics (GIGA), University of Liège, B4000 Liège, Belgium.
Viruses
|December 31, 2025
Resumen
El virus de la leucemia bovina (VLB) causa infecciones de por vida en el ganado, atacando principalmente a los linfocitos B. Si bien el sistema inmunitario controla la replicación viral, no logra detener la proliferación de las células infectadas, lo que conduce al cáncer.
Área de la Ciencia:
- Virología Veterinaria
- Oncología
- Inmunología
Sus antecedentes:
- El virus de la leucemia bovina (VLB) es un retrovirus que infecta al ganado (Bos taurus), causando infecciones persistentes.
- El VLB ataca a los linfocitos B, lo que conduce a infecciones asintomáticas, linfocitosis o linfoma.
- La transmisión ocurre a través de la sangre, la leche o transplacentariamente.
Objetivo del estudio:
- Elucidar los mecanismos de persistencia y leucogénesis del VLB en el ganado.
- Comprender la interacción entre la replicación viral, la inmunidad del huésped y el desarrollo del cáncer.
Principales métodos:
- Análisis de las estrategias de replicación del VLB (ciclo infeccioso frente a expansión clonal).
- Investigación de las respuestas inmunitarias del huésped al VLB, incluida la activación y supresión inmune.
- Examen de las alteraciones genéticas/epigenéticas virales y del huésped que contribuyen a la leucogénesis.
Principales resultados:
- El VLB establece infecciones de por vida al evadir el control inmunitario de la proliferación de células infectadas (expansión clonal).
- El virus modifica los transcriptomas de las células huésped a través de factores oncogénicos y ARN no codificantes.
- La leucogénesis resulta de alteraciones virales acumulativas (deleciones provirales, modificaciones LTR) y del huésped (mutaciones genómicas, integración de cromatina).
Conclusiones:
- El VLB emplea una estrategia de persistencia única que implica infección crónica, evasión inmune y oncogénesis lenta.
- La comprensión de estos mecanismos es crucial para el manejo de las enfermedades asociadas al VLB en el ganado.
- Este modelo destaca la compleja relación entre las infecciones virales persistentes y el desarrollo del cáncer.
Palabras clave:
virus de la leucemia bovina (VLB)leucosis bovina enzoótica (LBE)virus T-leucémico humano tipo 1 (HTLV-1)Más Videos Relacionados
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