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La lactilación de NBS1 es necesaria para la reparación eficiente del ADN y la resistencia a la quimioterapia
Hengxing Chen1, Yun Li2,3, Huafu Li4
1Guangdong Provincial Key Laboratory of Digestive Cancer Research, The Seventh Affiliated Hospital of Sun Yat-sen University, Shenzhen, Guangdong, China.
Nature
|July 3, 2024
Resumen
Las células cancerosas
Área de la Ciencia:
- Biología del cáncer
- Oncología molecular
- La reprogramación metabólica
Sus antecedentes:
- El efecto Warburg describe la preferencia de las células cancerosas por la glucólisis anaeróbica, produciendo lactato.
- No se comprende completamente el impacto del metabolismo del cáncer en la reparación del ADN y la respuesta a la quimioterapia.
Objetivo del estudio:
- Investigar el papel del lactato en la reparación del ADN y la respuesta a la quimioterapia.
- Aclarar el mecanismo por el cual el lactato influye en la reparación de la recombinación homóloga (RH).
Principales métodos:
- Se ha investigado la lactilación impulsada por el lactato de la proteína NBS1.
- Identificó TIP60 como la lactiltransferasa y HDAC3 como la deslactilase para NBS1 K388.
- Se evaluó el efecto de la reducción de lactato en la reparación del ADN y la resistencia a la quimioterapia.
Principales resultados:
- La lactilación de NBS1 en K388 es crucial para la formación de complejos de MRN y el reclutamiento de proteínas de reparación de HR.
- La lactilación alta de NBS1 K388 se correlaciona con malos resultados en la quimioterapia neoadyuvante.
- La inhibición de la producción de lactato (a través de la depleción de LDHA o el estiripentol) redujo la lactilación de NBS1, deterioró la reparación del ADN y superó la resistencia a la quimioterapia.
Conclusiones:
- La lactilación de NBS1 es un mecanismo clave que vincula el metabolismo del cáncer con la estabilidad del genoma y la resistencia a la quimioterapia.
- La orientación de la producción de lactato presenta una estrategia terapéutica prometedora para mejorar la eficacia del tratamiento del cáncer.
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