Transforming growth factor ß3 attenuates the development of radiation-induced pulmonary fibrosis in mice by decreasing fibrocyte recruitment and regulating IFN-γ/IL-4 balance.
Immunol Lett
; 162(1 Pt A): 27-33, 2014 Nov.
Article
en En
| MEDLINE
| ID: mdl-24996042
ABSTRACT
Radiation-induced pulmonary fibrosis is a frequently occurred complication from radiotherapy of thoracic tumors. The transforming growth factor-ß (TGF-ß) superfamily plays a key regulatory role in pulmonary fibrosis. As TGF-ß3 showed the potential anti-fibrotic properties especially in scar-less wound healing as opposed to the fibrotic function of TGF-ß1, we sought to explore the role of TGF-ß3 in radiation-induced pulmonary fibrosis. A single thoracic irradiation of 20 Gy was applied in mice to establish the model of radiation-induced pulmonary fibrosis and the mice were treated by intraperitoneal injections of recombinant TGF-ß3 weekly after irradiation. We found that TGF-ß3 decelerated the progress of radiation-induced pulmonary fibrosis and hindered the recruitment of fibrocytes to lung. In addition, Th1 response was suppressed as shown by diminished IFN-γ in bronchoalveolar lavage fluid (BALF) after irradiation, and enhancement of Th2 response was marked by increased IL-4 in BALF. TGF-ß3 administration significantly attenuated these effects and increased the percentage of Tregs in lung during the progression of pulmonary fibrosis. Taken together, these data suggest that TGF-ß3 might be involved in the regulatory mechanism for attenuation of radiation-induced pulmonary fibrosis.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Fibrosis Pulmonar
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Traumatismos Experimentales por Radiación
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Interleucina-4
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Interferón gamma
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Factor de Crecimiento Transformador beta3
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Immunol Lett
Año:
2014
Tipo del documento:
Article