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El inhibidor alostérico ABL001 permite la doble orientación de BCR-ABL1
Andrew A Wylie1, Joseph Schoepfer2, Wolfgang Jahnke2
1Novartis Institutes for BioMedical Research, Cambridge, Massachusetts 02139, USA.
Nature
|March 23, 2017
Resumen
ABL001 (asciminib) es un nuevo inhibidor alostérico para la leucemia mieloide crónica (LMC). La terapia combinada con ABL001 y nilotinib erradicó tumores de LMC en ratones, mostrando potencial para el control duradero de la enfermedad.
Área de la Ciencia:
- En el campo de la oncología
- Biología molecular
- Farmacología
Sus antecedentes:
- La leucemia mieloide crónica (LMC) está impulsada por la oncoproteína BCR-ABL1.
- Los inhibidores de la cinasa han mejorado los resultados de la LMC, pero la resistencia sigue siendo un desafío.
- La comprensión de los nuevos mecanismos farmacológicos es crucial para avanzar en el tratamiento de la LMC.
Objetivo del estudio:
- Para caracterizar ABL001 (asciminib), un nuevo inhibidor alostérico de ABL1.
- Investigar la eficacia de ABL001, solo y en combinación con nilotinib, en modelos preclínicos de LMC.
Principales métodos:
- Caracterización de la unión de ABL001 a la bolsa de miristoil de ABL1.
- Evaluación de la potencia celular y los perfiles de mutación de resistencia.
- Estudios preclínicos en ratones con tumores xenotransplantados de LMC utilizando terapias monoterápicas y combinadas.
Principales resultados:
- ABL001 se une a la bolsa de miristoil, induciendo una conformación ABL1 inactiva.
- ABL001 y nilotinib muestran patrones de mutación de resistencia distintos.
- La combinación de ABL001 y nilotinib logró el control completo de la enfermedad y la erradicación del tumor en ratones sin recurrencia.
Conclusiones:
- ABL001 representa un enfoque terapéutico distinto para la LMC dirigido al bolsillo de miristoil.
- La terapia combinada con ABL001 y nilotinib demuestra una potente eficacia preclínica contra la LMC.
- Esta combinación es prometedora para superar la resistencia y lograr respuestas duraderas en pacientes con LMC.
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