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La diversidad genética de los tumores con deficiencia de reparación de desajuste influye en la respuesta a la inmunoterapia anti-PD-1

  • 0Department of Otolaryngology-Head and Neck Surgery, Johns Hopkins University, Baltimore, MD 21287, USA.
Clinical Neuroscience (new York, N.y.) +

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4 de mayo de 2019

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4 de mayo de 2019

Ver abstracta en PubMed

Resumen

Este resumen es generado por máquina.

Los tumores con deficiencia de reparación por desajuste (MMR-d) muestran respuestas variables a los inhibidores de la PD-1. La inestabilidad de los microsatélites y la carga mutacional de inserción-eliminación tienen un impacto significativo en la eficacia del tratamiento en estos cánceres.

Área De La Ciencia

  • En el campo de la oncología
  • Inmunología
  • La genética

Sus Antecedentes

  • La deficiencia de reparación de desajuste (MMR-d) conduce a una alta carga mutacional tumoral, mejorando la inmunogenicidad.
  • A pesar de esto, los pacientes con tumores MMR-d presentan respuestas variables a los inhibidores del punto de control inmunológico PD-1, y muchos permanecen refractarios.

Objetivo Del Estudio

  • Investigar la relación entre los niveles de inestabilidad de los microsatélites (MSI) y la respuesta a la inmunoterapia de bloqueo PD-1 en los tumores MMR-d.
  • Identificar las características mutacionales específicas asociadas con resultados de tratamiento variables.

Principales Métodos

  • Análisis de datos experimentales y clínicos de modelos de tumores en humanos y ratones sometidos a RMM.
  • Evaluación de la intensidad de inestabilidad del microsatélite (MSI) y de la carga mutacional, incluidas las mutaciones de inserción-eliminación (indel).

Principales Resultados

  • El grado de inestabilidad del microsatélite (MSI) y la carga mutacional general se correlacionan con la variabilidad de la respuesta al bloqueo PD-1.
  • La acumulación de mutaciones de inserción-deleción (indel) es un factor clave asociado con el grado de respuesta.

Conclusiones

  • La intensidad de inestabilidad de los microsatélites y la carga mutacional son determinantes críticos de la respuesta a la inmunoterapia anti-PD-1 en los cánceres MMR-d.
  • La caracterización de todo el genoma de MSI y la carga mutacional puede mejorar el perfil del paciente para la terapia de bloqueo de PD-1.

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