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La desregulación epigenética de IRF9 conduce a una excesiva señalización de interferón en la EPOC
Maria Llamazares-Prada1,2,3, Uwe Schwartz3,4, Darius F Pease5
1Division of Cancer Epigenomics, German Cancer Research Center (DKFZ), Heidelberg, Germany.
EMBO molecular medicine
|February 23, 2026
Resumen
La enfermedad pulmonar obstructiva crónica (EPOC) afecta la regeneración pulmonar debido a la metilación alterada del ADN en las células alveolares. Este cambio epigenético interrumpe la señalización del interferón, lo que dificulta los mecanismos de reparación pulmonar.
Área de la Ciencia:
- Medicina Pulmonar La medicina pulmonar es el tratamiento de las enfermedades pulmonares.
- La epigenética es la epigenética.
- Biología celular Biología celular.
Sus antecedentes:
- La enfermedad pulmonar obstructiva crónica (EPOC) se caracteriza por una función de barrera respiratoria comprometida y una regeneración pulmonar deficiente.
- Las células progenitoras epiteliales alveolares (AT2) juegan un papel crucial en la reparación pulmonar, pero su capacidad regenerativa disminuye en la EPOC.
Objetivo del estudio:
- Aclarar los mecanismos moleculares subyacentes a la regeneración de las células AT2 alteradas en la EPOC.
- Investigar el papel de la metilación del ADN y la expresión génica en los defectos de regeneración pulmonar relacionados con la EPOC.
Principales métodos:
- La metilación del ADN de todo el genoma y el perfilamiento del transcriptoma de células AT2 primarias humanas ordenadas en diferentes etapas de EPOC.
- Análisis bioinformático para identificar correlaciones entre los patrones de metilación del ADN y la expresión génica.
- Análisis de la ruta para identificar las redes reguladoras clave, incluidos los factores de transcripción.
Principales resultados:
- Se identificaron patrones de metilación de ADN aberrantes en células AT2 de pacientes con EPOC, que se correlacionan con la expresión génica alterada.
- La señalización del interferón surgió como una vía significativamente regulada en las células AT2 de la EPOC, vinculada a la reducción de la metilación del ADN promotor-próximo.
- El factor de transcripción IRF9 fue identificado como un regulador maestro de la vía del interferón en la EPOC.
Conclusiones:
- La EPOC se asocia con alteraciones epigenéticas específicas, particularmente la metilación aberrante del ADN en las células AT2.
- La desregulación de la señalización del interferón, impulsada por IRF9, contribuye a la regeneración pulmonar deteriorada en la EPOC.
- Estos hallazgos destacan posibles objetivos terapéuticos para mejorar la reparación pulmonar en la EPOC al abordar las modificaciones epigenéticas.
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