USP28 Promueve la resistencia al Osimertinib en las células NSCLC H1975 mediante la desubiquitinación y la estabilización de SIRT1
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Ver abstracta en PubMed
Resumen
Este resumen es generado por máquina.El estudio revela que USP28 promueve la resistencia a osimertinib (OSI) en el cáncer de pulmón de células no pequeñas (CPNPC) mediante la estabilización de SIRT1. Dirigirse a la vía USP28/SIRT1 ofrece una nueva estrategia para superar la resistencia OSI en el NSCLC mutante EGFR.
Área De La Ciencia
- En el campo de la oncología
- Biología molecular
- Investigación del cáncer
Sus Antecedentes
- La resistencia al Osimertinib (OSI) es un obstáculo importante en el tratamiento del cáncer de pulmón de células no pequeñas (CPNPC).
- La comprensión de los mecanismos moleculares que impulsan la resistencia OSI es crucial para el desarrollo de terapias efectivas.
Objetivo Del Estudio
- Investigar el papel de la USP28 en la resistencia a la OSI en el NSCLC.
- Identificar los efectores aguas abajo de la USP28 implicados en la resistencia de la OSI.
Principales Métodos
- Se han establecido células H1975 resistentes a la OSI (H1975/OSI) y se ha analizado la expresión de USP28 y SIRT1.
- Se han realizado ensayos funcionales que incluyen la viabilidad celular, la proliferación, la apoptosis y la glucólisis.
- Se confirmó la interacción USP28-SIRT1 y la estabilidad de la proteína SIRT1 a través de la co-inmunoprecipitación.
- Resultados validados en los modelos de xenotransplante H1975/OSI.
Principales Resultados
- USP28 y SIRT1 fueron regulados al alza en las células resistentes a la OSI y en los tejidos de NSCLC.
- La sobreexpresión de USP28 aumentó la proliferación y la glucólisis, redujo la apoptosis y confirió resistencia a la OSI.
- USP28 estabilizó SIRT1 a través de la deubiquitinación, y esta interacción fue crítica para los efectos observados.
- La depleción USP28 sensibilizó a las células resistentes y a los xenografts al tratamiento de la OSI.
Conclusiones
- USP28 promueve la resistencia a la OSI en el NSCLC al desbiquitar y estabilizar la SIRT1.
- El eje USP28/SIRT1 es un objetivo terapéutico potencial para superar la resistencia OSI en el NSCLC mutante en EGFR.
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