Abstract:
BACKGROUND:The association between cigarette smoke exposure and allergic airway disease is a matter for debate. We sought to investigate in an in vitro system whether active smoking reduces the integrity and barrier function of the respiratory epithelium and thus facilitates allergen penetration. METHODS:We cultured the human bronchial epithelial cell line 16HBE14o- in a transwell culture system as a surrogate for the intact respiratory epithelium. The cell monolayer was exposed to standardized cigarette smoke extract (CSE). The extent and effects of trans-epithelial allergen penetration were measured using 125I-labelled purified major respiratory allergens (rBet v 1, rPhl p 5 and rDer p 2) and histamine release experiments. RESULTS:Exposure of cells to concentrations of CSE similar to those found in smokers induced the development of para-cellular gaps and a decrease in trans-epithelial resistance. CSE exposure induced a more than threefold increase in allergen penetration. Increased subepithelial allergen concentrations provoked a substantial augmentation of histamine release from sensitized basophils. CONCLUSIONS:Our results indicate that cigarette smoke is a potent factor capable of reducing the barrier function of the respiratory epithelium for allergens and may contribute to increased allergic inflammation, exacerbation of allergic disease and boosting of IgE memory.
journal_name
Allergyjournal_title
Allergyauthors
Gangl K,Reininger R,Bernhard D,Campana R,Pree I,Reisinger J,Kneidinger M,Kundi M,Dolznig H,Thurnher D,Valent P,Chen KW,Vrtala S,Spitzauer S,Valenta R,Niederberger Vdoi
10.1111/j.1398-9995.2008.01861.xsubject
Has Abstractpub_date
2009-03-01 00:00:00pages
398-405issue
3eissn
0105-4538issn
1398-9995pii
ALL1861journal_volume
64pub_type
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