Explotación de la infección viral/vacunación para enfocar las poblaciones de células T de alta afinidad en los tumores utilizando la inmunoterapia virológica oncolítica
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Ver abstracta en PubMed
Resumen
Este resumen es generado por máquina.La inmunoterapia contra el cáncer se puede mejorar redirigiendo las respuestas de las células T antivirales preexistentes. Este estudio demuestra el uso de antígenos SARS-CoV-2 con virus oncolíticos o células CAR-T para enfocar las células T en los tumores, lo que lleva a la curación de los tumores.
Área De La Ciencia
- Inmunología
- En el campo de la oncología
- Virología
Sus Antecedentes
- La tolerancia inmune limita las respuestas de las células T contra los antígenos autoasociados con el tumor (AAT), lo que dificulta la inmunoterapia contra el cáncer.
- Las infecciones virales priman las células T de alta afinidad, ofreciendo una estrategia potencial para superar esta limitación.
Objetivo Del Estudio
- Investigar el uso de la memoria de células T antivirales preexistentes contra los antígenos del SARS-CoV-2 para mejorar la inmunidad antitumoral.
- Para explorar el virus oncolítico (OV) y el receptor de antígeno quimérico (CAR) - entrega de células T de antígenos virales para la orientación tumoral.
Principales Métodos
- Estrategia primaria heteróloga y OV/boost mediante el uso de antígenos del SARS-CoV-2 (proteínas Mem o Spike).
- Terapia con células T del receptor de antígeno quimérico (CAR) que entregan vectores que expresan el antígeno SARS-CoV-2.
- In vivo aumento de las células CAR-T específicas de S con vacunas de proteína S.
Principales Resultados
- Las curas de tumores dependientes de las células T CD8+ se lograron utilizando antígenos SARS-CoV-2 para la concentración de células T, con evidencia de propagación de epítopos contra los AAT.
- Las células CAR-T entregaron con éxito vectores del antígeno SARS-CoV-2 a los tumores, incluso en ratones preinmunes.
- El aumento in vivo de las células CAR-T aumentó la actividad y la persistencia antitumorales.
Conclusiones
- Aprovechar las respuestas de células T antivirales preexistentes a través de la entrega de antígenos virales por células OV o CAR-T es una estrategia viable para generar células T de alta afinidad para la inmunoterapia contra el cáncer.
- Este enfoque ofrece una alternativa terapéutica cuando las células T antitumorales de alta afinidad no están disponibles.
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