Effects of interleukin-17 on murine pulmonary fibroblast proliferation, transformation and collagen synthesis.
- Author:
Zhaoxing DONG
1
;
Qingxin KANG
;
Wen LEI
;
Hong ZHONG
;
Wenlin TAI
;
Dianhua WANG
Author Information
- Publication Type:Journal Article
- MeSH: Animals; Bleomycin; Cell Proliferation; Cells, Cultured; Collagen Type I; biosynthesis; Collagen Type III; biosynthesis; Epithelial-Mesenchymal Transition; Fibroblasts; metabolism; pathology; Interleukin-17; genetics; metabolism; Lung; pathology; Male; Mice; Mice, Inbred C57BL; Pulmonary Fibrosis; chemically induced; metabolism; pathology; RNA, Messenger; genetics; metabolism; Receptors, Interleukin-17; genetics; metabolism
- From: Journal of Southern Medical University 2012;32(1):75-79
- CountryChina
- Language:Chinese
-
Abstract:
OBJECTIVETo investigate the effects of interleukin-17 (IL-17) on the proliferation, transformation and collagen synthesis of the lung fibroblasts in mice with bleomycin-induced pulmonary fibrosis.
METHODSIn a mouse model of pulmonary fibrosis established by intratracheal administration of 5 mg/kg bleomycin, the dynamic expressions of IL-17/IL-17 receptor (IL-17R) mRNAs were detected by RT-PCR. At 14 days following bleomycin administration, the pulmonary fibroblasts were isolated, cultured and identified. MTT assay was used to assess the proliferation of the pulmonary fibroblasts in response to IL-17 treatment at different concentrations, and RT-PCR and Western blotting were employed to examine the mRNA and protein expressions of α-smooth muscle actin (α-SMA) and types I and III collagen.
RESULTSIL-17/IL-17R mRNA levels were increased obviously in the pulmonary fibroblasts of rats with pulmonary fibrosis, and the highest expressions occurred at 14 days following bleomycin administration. Exogenous IL-17, at the optimal concentration of 50 ng/ml, significantly promoted the proliferation of the pulmonary fibroblasts in primary culture and obviously increased α-SMA expression and types I and III collagen synthesis in the fibroblasts.
CONCLUSIONIL-17 can promote the proliferation, transformation, and collagen synthesis of the pulmonary fibroblasts from rats with bleomycin-induced pulmonary fibrosis.