Abstract

The extent to which individual vs combination treatments that specifically targeted epithelial damage (trefoil factor-2, TFF2), fibrosis (serelaxin, RLX) or inflammation (AI; dexamethasone, DEX) reversed the pathogenesis of chronic allergic airways disease (AAD) was assessed. Following induction of a 9-week ovalbumin (OVA)-induced model of chronic AAD in 6-8week old female Balb/c mice, animals were i.p-administered with naphthalene (NA); then received daily i.n-administration of saline (vehicle); RLX (0.8mg/ml); TFF2 (0.5mg/ml); DEX (0.5mg/ml); RLX+TFF2; or RLX+TFF2+DEX from d67-74. On d75, lung function was assessed by plethysmography, beforelung tissue was taken for analysis. A control group treated with saline+corn oil (Saline/CO; vehicle for NA) was included. A significant increase in AI, epithelial damage/thickness; myofibroblast differentiation; subepithelial/total collagen and fibronectin deposition; and a significant reduction in airway dynamic compliance (cDyn) was observed in OVA+NA injured mice (all p

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