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La acumulación de grasa dependiente de leptina desencadena autofagia en un modelo de esteatohepatitis asociada a
Sophia C H Polte1, Tomomitsu Matono2, Kinya Okamoto2
1Psychiatry and Psychotherapy, Ernst von Bergmann Clinic Potsdam, Potsdam, Germany.
Translational gastroenterology and hepatology
|February 12, 2026
Resumen
La pérdida de leptina en ratones obesos promueve la autofagia. El oleato de etilo desencadena la autofagia en las células hepáticas y las células estrelladas hepáticas, ofreciendo posibles vías terapéuticas para la enfermedad del hígado graso asociada a disfunción metabólica (MASLD).
Área de la Ciencia:
- Hepatología
- Biología Celular
- Enfermedades Metabólicas
Sus antecedentes:
- La enfermedad del hígado graso asociada a disfunción metabólica (MASLD) implica la acumulación de grasa hepática.
- La autofagia desempeña un papel dual: protectora en hepatocitos y pro-fibrótica en células estrelladas hepáticas (HSC).
- La investigación de la modulación de la autofagia ofrece una estrategia terapéutica potencial para MASLD.
Objetivo del estudio:
- Investigar el papel de la leptina y el oleato de etilo en la modulación de la autofagia en MASLD.
- Explorar el impacto de la modulación de la autofagia en la acumulación de grasa hepática y los marcadores de fibrosis.
- Evaluar el potencial terapéutico de la modulación de la autofagia en MASLD.
Principales métodos:
- Análisis de tejido hepático murino y células hepáticas humanas mediante RT-qPCR y Western blot.
- Monitorización de la maduración de la autofagia mediante fluorescencia en tiempo real.
- Cuantificación de la acumulación de grasa (Oil Red O) y fibras de colágeno (tinción picrosirius).
Principales resultados:
- La pérdida de leptina en ratones obesos con MASH aumentó la expresión de genes y proteínas relacionados con la autofagia.
- El oleato de etilo indujo acumulación de grasa y alteró los marcadores de autofagia en las células hepáticas, con efectos variables en la activación de AMPK.
- El oleato de etilo aumentó la grasa y la transcripción de COL1A1 en las HSC, aumentando BECN1/MAP1LC3B pero disminuyendo otras proteínas de autofagia.
Conclusiones:
- La deficiencia de leptina influye en la autofagia en ratones obesos con MASH.
- La administración de oleato de etilo puede inducir autofagia tanto en células similares a hepatocitos como en HSC humanas, lo que sugiere un objetivo terapéutico potencial para MASLD.
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