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Epithelial coxsackievirus adenovirus receptor promotes house dust mite-induced lung inflammation

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Item Type:Article
Title:Epithelial coxsackievirus adenovirus receptor promotes house dust mite-induced lung inflammation
Creators Name:Ortiz-Zapater, E. and Bagley, D.C. and Hernandez, V.L. and Roberts, L.B. and Maguire, T.J.A. and Voss, F. and Mertins, P. and Kirchner, M. and Peset-Martin, I. and Woszczek, G. and Rosenblatt, J. and Gotthardt, M. and Santis, G. and Parsons, M.
Abstract:Airway inflammation and remodelling are important pathophysiologic features in asthma and other respiratory conditions. An intact epithelial cell layer is crucial to maintain lung homoeostasis, and this depends on intercellular adhesion, whilst damaged respiratory epithelium is the primary instigator of airway inflammation. The Coxsackievirus Adenovirus Receptor (CAR) is highly expressed in the epithelium where it modulates cell-cell adhesion stability and facilitates immune cell transepithelial migration. However, the contribution of CAR to lung inflammation remains unclear. Here we investigate the mechanistic contribution of CAR in mediating responses to the common aeroallergen, House Dust Mite (HDM). We demonstrate that administration of HDM in mice lacking CAR in the respiratory epithelium leads to loss of peri-bronchial inflammatory cell infiltration, fewer goblet-cells and decreased pro-inflammatory cytokine release. In vitro analysis in human lung epithelial cells confirms that loss of CAR leads to reduced HDM-dependent inflammatory cytokine release and neutrophil migration. Epithelial CAR depletion also promoted smooth muscle cell proliferation mediated by GSK3β and TGF-β, basal matrix production and airway hyperresponsiveness. Our data demonstrate that CAR coordinates lung inflammation through a dual function in leucocyte recruitment and tissue remodelling and may represent an important target for future therapeutic development in inflammatory lung diseases.
Keywords:Acute Inflammation, Adherens Junctions, Extracellular Signalling Molecules, Inflammatory Diseases, Mechanisms of Disease, Animals, Mice
Source:Nature Communications
Publisher:Nature Publishing Group
Page Range:6407
Date:27 October 2022
Official Publication:https://doi.org/10.1038/s41467-022-33882-w
PubMed:View item in PubMed

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