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Los complejos de polvo de carbón albergan hierro celular para impactar la homeostasis del metal y la neumoconiosis
Andy J Ghio1, Joleen M Soukup1, Lisa A Dailey1
1US Environmental Protection Agency, Chapel Hill, NC.
American journal of physiology. Lung cellular and molecular physiology
|February 21, 2026
Resumen
El polvo de carbón y las sustancias húmicas agotan el hierro celular, causando estrés oxidativo e inflamación. Esta interrupción del hierro está relacionada con la progresión de la neumonoconiosis de los trabajadores del carbón en los mineros.
Área de la Ciencia:
- Salud Ambiental Salud del medio ambiente.
- Toxicología Toxicología.
- Medicina Pulmonar La medicina pulmonar es el tratamiento de las enfermedades pulmonares.
Sus antecedentes:
- La exposición al polvo de la mina de carbón está relacionada con la enfermedad pulmonar.
- Las sustancias húmicas (HS) son componentes del carbón que pueden afectar el hierro celular.
Objetivo del estudio:
- Investigar si el polvo de carbón y el HS causan deficiencia funcional de hierro.
- Para determinar si la deficiencia de hierro conduce al estrés oxidativo y la inflamación.
- Para explorar la asociación entre la alteración de la homeostasis del hierro y la neumoconiosis.
Principales métodos:
- Las células cultivadas expuestas al polvo de carbón y al HS.
- Se midió la expresión del importador de hierro celular (transportador de metales divalentes-1) y el hierro no hemo.
- Se evaluó la generación de superóxido y la liberación de mediadores inflamatorios (IL-6, IL-8).
- Analizó los niveles de ferritina en sangre y la progresión de la neumonoconiosis en mineros jubilados.
Principales resultados:
- El polvo de carbón y el HS indujeron deficiencia funcional de hierro, aumentando la absorción de metales.
- La exposición aumentó la generación de superóxido y la liberación de citoquinas inflamatorias.
- La co-exposición al hierro mitigó el estrés oxidativo y la inflamación.
- El aumento de la ferritina en sangre se correlacionó con el diagnóstico y la progresión de la neumonoconiosis de los trabajadores del carbón.
Conclusiones:
- El polvo de carbón y el HS interrumpen la homeostasis del hierro, lo que lleva al estrés oxidativo y la inflamación.
- Esta alteración está asociada con el desarrollo y la progresión de la neumonoconiosis.
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