scholarly journals Roles of epidermal growth factor receptor activation in epithelial cell repair and mucin production in airway epithelium

Thorax ◽  
2004 ◽  
Vol 59 (11) ◽  
pp. 992-996 ◽  
Author(s):  
P-R Burgel
Keyword(s):  
Epidermal Growth Factor Receptor ◽  
Growth Factor ◽  
Epithelial Cell ◽  
Epidermal Growth Factor ◽  
Airway Epithelium ◽  
Growth Factor Receptor ◽  
Receptor Activation ◽  
Cell Repair ◽  
Mucin Production ◽  
Epidermal Growth

Neutrophil elastase induces mucin production by ligand-dependent epidermal growth factor receptor activation

2002 ◽  
Vol 283 (3) ◽  
pp. L531-L540 ◽  
Author(s):  
Kazuhiro Kohri ◽  
Iris F. Ueki ◽  
Jay A. Nadel
Keyword(s):  
Epidermal Growth Factor Receptor ◽  
Growth Factor ◽  
Epidermal Growth Factor ◽  
Neutrophil Elastase ◽  
Growth Factor Receptor ◽  
Receptor Activation ◽  
Cell Culture Supernatant ◽  
Mucin Production ◽  
Egfr Activation ◽  
Epidermal Growth

Neutrophil products are implicated in hypersecretory airway diseases. To determine the mechanisms linking a proteolytic effect of human neutrophil elastase (HNE) and mucin overproduction, we examined the effects of HNE on MUC5AC mucin production in human airway epithelial (NCI-H292) cells. Stimulation with HNE for 5–30 min induced MUC5AC production 24 h later, which was prevented by HNE serine active site inhibitors, implicating a proteolytic effect of HNE. MUC5AC induction was preceded by epidermal growth factor receptor (EGFR) tyrosine phosphorylation and was prevented by selective EGFR tyrosine kinase inhibitors, implicating EGFR activation. HNE-induced MUC5AC production was inhibited by a neutralizing transforming growth factor-α (TGF-α, an EGFR ligand) antibody and by a neutralizing EGFR antibody but not by oxygen free radical scavengers, further implicating TGF-α and ligand-dependent EGFR activation in the response. HNE decreased pro-TGF-α in NCI-H292 cells and increased TGF-α in cell culture supernatant. From these results, we conclude that HNE-induced MUC5AC mucin production occurs via its proteolytic activation of an EGFR signaling cascade involving TGF-α.

Sign in / Sign up

Export Citation Format

Share Document