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Las células madre de la vía aérea distal son esenciales para la regeneración pulmonar
Wei Zuo1, Ting Zhang1, Daniel Zheng'An Wu1
1Genome Institute of Singapore, A-STAR, 138672 Singapore.
Nature
|November 11, 2014
Resumen
Las células madre de las vías respiratorias distales (DASC) regeneran el tejido pulmonar después de la infección por influenza. Estas células son cruciales para la reparación pulmonar y tienen potencial para el tratamiento de enfermedades pulmonares.
Área de la Ciencia:
- Medicina Pulmonar La medicina pulmonar es el tratamiento de las enfermedades pulmonares.
- La Medicina Regenerativa es una Medicina Regenerativa.
- Biología de las células madre Biología de las células madre
Sus antecedentes:
- Las enfermedades pulmonares crónicas como la EPOC y la fibrosis pulmonar causan daño pulmonar progresivo.
- Las terapias actuales son limitadas, y la medicina regenerativa para los pulmones carece de apoyo empírico.
- Las observaciones clínicas sugieren la recuperación espontánea de la función pulmonar después de una lesión grave.
Objetivo del estudio:
- Investigar el papel de las células madre de las vías respiratorias distales (DASC) en la regeneración pulmonar después del daño inducido por la gripe.
- Determinar si los DASC son esenciales para la reparación pulmonar y pueden usarse con fines terapéuticos.
Principales métodos:
- Estudió la regeneración pulmonar en ratones después de la infección por influenza H1N1.
- Identificaron y rastrearon células madre de las vías respiratorias distales que expresan Trp63 (p63) y queratina 5 (DASC ((p63/Krt5)).
- Utilizó la ablación selectiva de DASCs in vivo y realizó experimentos de trasplante de DASC.
Principales resultados:
- Las células preexistentes de DASC ((p63/Krt5) proliferaron y formaron nuevos alvéolos en respuesta al daño de la influenza.
- La ablación de DASC ((p63/Krt5) deteriora la regeneración, lo que lleva a la fibrosis y a un intercambio de oxígeno reducido.
- Las células trasplantadas DASC ((p63/Krt5) se diferenciaron en varios tipos de células pulmonares y mitigaron el daño.
Conclusiones:
- Las células DASC ((p63/Krt5) son críticas para la regeneración pulmonar después de una lesión viral.
- Estas células tienen el potencial para terapias basadas en células en el tratamiento de enfermedades pulmonares agudas y crónicas.
- Propagación de DASC ((p63/Krt5) en cultivo mantiene su compromiso de linaje para aplicaciones terapéuticas.
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