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Updated: Sep 9, 2025
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Isolation of Primary Mouse Hepatocytes for Nascent Protein Synthesis Analysis by Non-radioactive L-azidohomoalanine Labeling Method
Published on: October 23, 2018
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La AMPK mantiene la activación de las células estelares hepáticas a través de la reprogramación metabólica inducida
Hanmin Wang1,2,3, Guanzhen Wang1,3, Tao Yin1,4,3
1State Key Laboratory of Chemical Biology, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
Journal of molecular cell biology
|September 4, 2025
Resumen
La proteína quinasa activada por AMP (AMPK) conduce a la fibrosis hepática al promover la activación de las células esteladas hepáticas (HSC) y la función mitocondrial. La inhibición de la AMPK en los HSC reduce la fibrosis hepática, destacando la señalización de la AMPK- mitofagia como objetivo terapéutico.
Área de la Ciencia:
- Biología celular
- Enfermedad metabólica
- Enfermedad del hígado
Sus antecedentes:
- La activación de las células esteladas hepáticas (HSC) es fundamental para la fibrosis hepática.
- Los combustibles de reprogramación metabólica activan las HSC para funciones como la síntesis de matriz.
- El papel de la proteína quinasa activada por AMP (AMPK) en la activación de la HSC y la fibrosis no se comprende completamente.
Objetivo del estudio:
- Investigar el papel de la AMPK en la activación del HSC y la progresión de la fibrosis hepática.
- Esclarecer los mecanismos por los que AMPK influye en el metabolismo y la función de los HSC.
Principales métodos:
- Se examinó la fosforilación de AMPK en tejidos hepáticos de humanos y ratones.
- Se utilizaron modelos de ratón con knockout AMPK específico de HSC (inducido por CCl4 y BDL).
- Estudios in vitro realizados en HSC con actividad variable de AMPK y modulación de la mitofagia.
Principales resultados:
- La fosforilación de AMPK fue elevada en las afecciones hepáticas fibróticas.
- La deleción de AMPK específica de HSC redujo significativamente la fibrosis hepática.
- AMPK promovió la activación de HSC, dependiente de la fosforilación oxidativa mitocondrial y la mitofagia a través de las vías AMPK-ULK1/ Raptor.
Conclusiones:
- La AMPK juega un papel crítico en la activación del HSC y la fibrosis hepática.
- La mitofagia mediada por AMPK es esencial para mantener la calidad mitocondrial y el suministro de energía en los HSC activados.
- Dirigirse a la señalización de la mitofagia AMPK ofrece una nueva estrategia terapéutica para la fibrosis hepática.
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