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La PDCD5 contribuye al daño de las células epiteliales de las vías respiratorias a través de la vía mitocondrial y

Hu Shan¹, Rui Zhang¹, Yu-Er Li¹

¹Department of Respiratory and Critical Care Medicine, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi, China.

The Kaohsiung journal of medical sciences

|December 25, 2025

Resumen

La proteína 5 asociada a la muerte celular programada (PDCD5) exacerba el daño de las células epiteliales de las vías respiratorias en la enfermedad pulmonar obstructiva crónica (EPOC) al alterar la función mitocondrial. La PDCD5 puede servir como biomarcador diagnóstico y objetivo terapéutico para la EPOC.

Área de la Ciencia:

Medicina Pulmonar
Biología Celular
Biología Mitocondrial

Sus antecedentes:

La lesión de las células epiteliales de las vías respiratorias es central en la patogénesis de la enfermedad pulmonar obstructiva crónica (EPOC).
La disfunción mitocondrial contribuye a esta lesión, pero los mecanismos subyacentes no están claros.
El extracto de humo de cigarrillo (CSE) es un inductor clave de la lesión de las células epiteliales de las vías respiratorias en la EPOC.

Objetivo del estudio:

Identificar genes implicados en la disfunción mitocondrial durante la lesión de las células epiteliales de las vías respiratorias inducida por CSE.
Investigar el papel de la proteína 5 asociada a la muerte celular programada (PDCD5) en este proceso.
Evaluar la PDCD5 como biomarcador potencial y objetivo terapéutico para la EPOC.

Principales métodos:

Secuenciación de ARN para identificar genes diferencialmente expresados (DEGs) en células epiteliales de las vías respiratorias tratadas con CSE.
Análisis de redes de interacción proteína-proteína para identificar genes centrales.
Análisis de la expresión de PDCD5 en pacientes con EPOC, ratones y células tratadas con CSE.
Estudios funcionales que implican el silenciamiento de PDCD5 (siRNA) para evaluar su impacto en la función mitocondrial, los niveles de ROS, la apoptosis y la viabilidad celular.

Principales resultados:

La secuenciación de ARN identificó numerosos genes diferencialmente expresados (DEGs), destacando la PDCD5 como un posible gen central relacionado con la disfunción mitocondrial.
La expresión de PDCD5 se elevó significativamente en las vías respiratorias de pacientes con EPOC y aumentó en las células tratadas con extracto de humo de cigarrillo (CSE).
El silenciamiento de PDCD5 atenuó el daño mitocondrial inducido por CSE, la acumulación de especies reactivas de oxígeno (ROS), la depleción de ATP, la apoptosis y la pérdida de viabilidad celular.

Conclusiones:

La PDCD5 desempeña un papel crítico en el daño de las células epiteliales de las vías respiratorias a través de la vía mitocondrial en respuesta al CSE.
La PDCD5 está implicada en la patogénesis de la EPOC.
La PDCD5 representa un biomarcador diagnóstico y un objetivo terapéutico potencial para la EPOC.

Palabras clave:

PDCD5 célula epitelial de las vías respiratorias enfermedad pulmonar obstructiva crónica humo de cigarrillo mitocondria

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