La normalización de los niveles de oxígeno induce una reprogramación metabólica en el hígado expuesto a hipoxia intermitente que imita la apnea obstructiva del sueño
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Updated: Sep 10, 2025
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A Model to Simulate Clinically Relevant Hypoxia in Humans
Published on: December 22, 2016
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Miguel Á Hernández-García1, Beatriz Aldave-Orzáiz2, Carlos Ernesto Fernández-García1
1Research Unit, Hospital Universitario Santa Cristina, Instituto de Investigación Sanitaria Hospital Universitario de La Princesa, 28006 Madrid, Spain.
Antioxidants (Basel, Switzerland)
|August 28, 2025
Resumen
El tratamiento de la apnea obstructiva del sueño (AOS) con CPAP mejora la salud del hígado mediante la normalización de los niveles de oxígeno. Esto reduce la enfermedad hepática grasa (MASLD) y mejora la disfunción metabólica mediante la restauración de la oxidación de los ácidos grasos.
Área de la Ciencia:
- Hepatología
- Medicina del sueño
- Trastornos del metabolismo
Sus antecedentes:
- La apnea obstructiva del sueño (AOS) está relacionada con el síndrome metabólico y la enfermedad hepática estatotica asociada a la disfunción metabólica (MASLD).
- La hipoxia intermitente (IH) en la AOS empeora el MASLD a través del estrés oxidativo, la inflamación y la acumulación de lípidos.
Objetivo del estudio:
- Investigar cómo la normalización de los niveles de oxígeno afecta la disfunción metabólica en pacientes con AOS y ratones.
- Evaluar los efectos de la terapia de presión positiva continua en las vías respiratorias (CPAP, por sus siglas en inglés) sobre el MASLD en pacientes con AOS.
Principales métodos:
- Estudio clínico: 76 participantes (44 OSA, 32 controles) analizados para marcadores metabólicos y hepáticos antes y después de 18 meses de CPAP.
- Estudio experimental: ratones expuestos a IH seguidos de reoxigenación para evaluar los cambios hepáticos y la expresión génica.
Principales resultados:
- Los pacientes con AOS presentaron mayor resistencia a la insulina, triglicéridos, VLDL, enzimas hepáticas y esteatosis. El tratamiento con CPAP mejoró significativamente estos marcadores y las puntuaciones de la esteatosis hepática.
- La IH en ratones causó acumulación de lípidos en el hígado, estrés oxidativo e inflamación; la reoxigenación invirtió estos efectos.
- La IH alteró la expresión génica de la oxidación de ácidos grasos (FAO); la reoxigenación restauró la actividad de la FAO, mejorando el aclaramiento lipídico a pesar de la lipogénesis.
Conclusiones:
- El tratamiento con CPAP mejora los perfiles lipídicos, la función hepática y el MASLD en pacientes con AOS.
- La normalización del oxígeno, al restaurar la vía de la FAO, ofrece un potencial terapéutico para revertir el daño hepático inducido por la IH y la reprogramación metabólica.
Palabras clave:
El CPAPEn el caso de loshipoxia intermitentemetabolismo de los lípidosSteatosis del hígadoApnea obstructiva del sueñoEsteatosisMás Videos Relacionados
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