TGFß mediates collagen production in human CRSsNP nasal mucosa-derived fibroblasts through Smad2/3-dependent pathway and CTGF induction and secretion.
J Cell Physiol
; 234(7): 10489-10499, 2019 07.
Article
en En
| MEDLINE
| ID: mdl-30426494
ABSTRACT
Chronic rhinosinusitis without nasal polyp (CRSsNP) is characterized by tissue remodeling and fibrosis. Transforming growth factor-ß (TGF-ß) is considered a master switch in the induction of the profibrotic program which can induce fibroblasts to synthesize and contract extracellular matrix (ECM) proteins. A previous study has shown TGF-ß1 signaling and collagen overproduction in the CRSsNP, but the responsible cells and mechanism of action remain unclear. Therefore, this study was aimed to investigate the relationship between TGF-ß1 stimulation and collagen expression and to explore the role of connective tissue growth factor (CTGF) during the remodeling process using human CRSsNP nasal mucosa tissues and mucosa-derived fibroblasts as main materials. We found that TGF-ß1 and its isoforms could promote collagen protein expression. Concomitantly, TGF-ß1 caused CTGF expression and secretion. An addition of exogenous CTGF to fibroblasts also caused collagen expression. In accordance with these observations, TGF-ß1, CTGF, and collagen were highly expressed in the subepithelial stroma region of CRSsNP nasal mucosa, as determined by immunohistochemistry. The TGF-ß1-mediated collagen expression could be blocked by actinomycin D and SIS3, suggesting that the induction was through transcriptional regulation and Smad2/3-dependent pathway. Finally, we demonstrated that CTGF small interfering RNA knockdown led to a substantial decrease in TGF-ß1-mediated collagen expression. Collectively, our results provide first and further evidence that TGF-ß1 mediates collagen expression-production through a canonical Smad2/3-dependent pathway and CTGF induction and secretion in human nasal fibroblasts. Moreover, TGF-ß1, CTGF, and collagen are highly expressed in human CRSsNP nasal mucosa specimens, suggesting their roles in tissue remodeling during CRSsNP progression.
Palabras clave
Texto completo:
1
Banco de datos:
MEDLINE
Asunto principal:
Sinusitis
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Colágeno
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Proteína Smad2
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Proteína smad3
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Factor de Crecimiento del Tejido Conjuntivo
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Fibroblastos
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Mucosa Nasal
Límite:
Humans
Idioma:
En
Revista:
J Cell Physiol
Año:
2019
Tipo del documento:
Article
País de afiliación:
Taiwán