The respiratory epithelium produces a variety of inflammatory mediators which may be influencing the bronchial hyperreactivity observed in patients with asthma. Animal studies have demonstrated that removal of the epithelium from tracheal and bronchial smooth muscle causes enhanced responses to chol
The effect of passive sensitisation of human bronchial smooth muscle on in vitro sensitivity to histamine
โ Scribed by J.A. Roberts; N.C. Thomson
- Publisher
- Elsevier
- Year
- 1989
- Tongue
- English
- Weight
- 262 KB
- Volume
- 2
- Category
- Article
- ISSN
- 0952-0600
No coin nor oath required. For personal study only.
โฆ Synopsis
Allergen exposure may precipitate acute bronchoconstriction and increase bronchial reactivity. We have investigated whether passive sensitisation of human airway per se or short-term exposure to mediators released by specific antigen exposure produces an alteration in in vitro smooth muscle sensitivity to histamine. Exposure to allergen produced smooth muscle contraction in sensitised tissue, but subsequent smooth muscle sensitivity to histamine was not altered. We conclude that neither passive sensitisation nor short-term exposure to mast cell mediators alters in vitro smooth muscle sensitivity to histamine.
๐ SIMILAR VOLUMES
After cardiovascular intervention, smooth muscle cells (SMC) are directly exposed to blood flow and thus their behavior might be affected by fluid hemodynamic forces. The aim of this study was to determine the effect of fluid shear stress on the growth rate of SMC. Human aortic smooth muscle cells (
Studies investigating mechanisms of mucociliary clearance have suggested that beta 2-adrenergic agents may significantly influence ciliary activity of epithelial cells and therefore play a vital role in the maintenance of functional integrity of the airways. We have cultured human bronchial epitheli
Inhaled frusemide has been shown to inhibit bronchoconstriction induced by immunological and nonimmunological stimuli in asthmatic patients. The mechanisms by which this compound exerts its effect in asthmatic airways are unknown, but an inhibitory action on the activation of inflammatory cells or o
The effect of hydrogen peroxide (H2O2) was examined on baseline and on methacholine- and phenylephrine-stimulated smooth muscle tone, mucus volume and lysozyme outputs, and epithelial albumin transport of the ferret whole trachea in vitro. H2O2 (10 microM-10 mM) had no significant effect on tracheal