| First Author | Broide DH | Year | 2005 |
| Journal | Proc Natl Acad Sci U S A | Volume | 102 |
| Issue | 49 | Pages | 17723-8 |
| PubMed ID | 16317067 | Mgi Jnum | J:104395 |
| Mgi Id | MGI:3611744 | Doi | 10.1073/pnas.0509235102 |
| Citation | Broide DH, et al. (2005) Allergen-induced peribronchial fibrosis and mucus production mediated by IkappaB kinase beta-dependent genes in airway epithelium. Proc Natl Acad Sci U S A 102(49):17723-8 |
| abstractText | In response to inflammation or injury, airway epithelial cells express inducible genes that may contribute to allergen-induced airway remodeling. To determine the contribution of epithelial cell NF-kappaB activation to the remodeling response, we generated CC10-Cre(tg)/Ikkbeta(delta/delta) mice in which NF-kappaB signaling through IkappaB kinase beta (IKKbeta) is selectively ablated in the airway epithelium by conditional Cre-recombinase expression from the Clara cell (CC10) promoter. Repetitive ovalbumin challenge of mice deficient in airway epithelial IKKbeta prevented nuclear translocation of the RelA NF-kappaB subunit only in airway epithelial cells, resulting in significantly lower peribronchial fibrosis in CC10-Cre(tg)/Ikkbeta(delta/delta) mice compared with littermate controls as assessed by peribronchial trichrome staining and total lung collagen content. Levels of airway mucus, airway eosinophils, and peribronchial CD4+ cells in ovalbumin-challenged mice were also reduced significantly upon airway epithelial Ikkbeta ablation. The diminished inflammatory response was associated with reduced expression of NF-kappaB-regulated chemokines, including eotaxin-1 and thymus- and activation-regulated chemokine, which attract eosinophils and Th2 cells, respectively, into the airway. The number of peribronchial cells expressing TGF-beta1, as well as TGF-beta1 amounts in bronchoalveolar lavage, were also significantly reduced in mice deficient in airway epithelium IKKbeta. Overall, these studies show an important role for NF-kappaB regulated genes in airway epithelium in allergen-induced airway remodeling, including peribronchial fibrosis and mucus production. |
