Abstract:The proximal and distal portions of the lungs may respond differently to antigen challenge and bronchodilator treatment. This difference may contribute to differences in actual and perceived efficacy of therapies. In this study we used the forced oscillation technique (FOT) to measure impedance in the pulmonary system and discern the effects of antigen challenge on proximal (large airway) and distal (small airway and lung parenchyma) portions of the lung. In addition we treated the animals with two i.m. inject… Show more
“…Similar findings describing a correlation between subepithelial fibrosis and progression of AHR have also been reported in mice after chronic HDM exposure (52). Notably, and in agreement with our observations, a recent study in allergic cynomolgus monkeys suggests that treatments aimed at improving smaller airways dysfunction might be more effective in asthma (53).…”
Rationale-IL-9 is a pleiotropic cytokine that has multiple effects on structural as well as numerous hematopoietic cells, which are central to the pathogenesis of asthma.Objectives-The contribution of IL-9 to asthma pathogenesis has thus far been unclear, due to conflicting reports in the literature. These earlier studies focused on the role of IL-9 in acute inflammatory models; here we have investigated the effects of IL-9 blockade during chronic allergic inflammation.Methods-Mice were exposed to either prolonged ovalbumin or house dust mite allergen challenge to induce chronic inflammation and airway remodeling.
“…Similar findings describing a correlation between subepithelial fibrosis and progression of AHR have also been reported in mice after chronic HDM exposure (52). Notably, and in agreement with our observations, a recent study in allergic cynomolgus monkeys suggests that treatments aimed at improving smaller airways dysfunction might be more effective in asthma (53).…”
Rationale-IL-9 is a pleiotropic cytokine that has multiple effects on structural as well as numerous hematopoietic cells, which are central to the pathogenesis of asthma.Objectives-The contribution of IL-9 to asthma pathogenesis has thus far been unclear, due to conflicting reports in the literature. These earlier studies focused on the role of IL-9 in acute inflammatory models; here we have investigated the effects of IL-9 blockade during chronic allergic inflammation.Methods-Mice were exposed to either prolonged ovalbumin or house dust mite allergen challenge to induce chronic inflammation and airway remodeling.
“…Respiratory rate and other measures of respiratory function (e.g., tidal volume or hemoglobin oxygen saturation) should be evaluated. Initial assessment can be performed in NHPs using head-out or whole-body plethysmography (Iizuka et al 2010;Lawler et al 2006;Nalca et al 2010), and follow-up evaluation, such as measurement of pulmonary resistance, can be done in anesthetized animals (Chapman et al 2005;Skeans et al 2005;Curran et al 2008). 7.3, ICH 7A 2000).…”
Section: Respiratory System Safety Pharmacologymentioning
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