airway wall remodelling

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airway wall remodelling

A series of structural changes seen in the airways of patients with severe asthma, including interstitial fibrosis and reduced responsiveness to therapy.
Components Hypertrophy and hyperplasia of airway smooth muscle, myofibroblast activation (increased subepithelial basement membrane collagen deposition), angiogenesis (increased submucosal blood vessels), and increased airway epithelial goblet cells. The increased smooth-muscle mass and thickened subepithelial basement membrane are controlled by a complex interaction between mesenchymal growth factors (TGF, EGF, IGF) and their receptors and the balance between degradative enzymes (e.g., the matrix metalloproteinase, MMP-9, and its inhibitor, TIMP-1); tissue remodelling, as demonstrated by collagen deposition and expansion of the smooth-muscle mass, may be driven by an imbalance in this delicately controlled system. Tissue remodelling may also involve increased neural innervation, and nerve growth factor has been implicated in upregulating neuropeptides (substance P and calcitonin gene-related peptide) in the primary sensory neurones innervating inflamed tissues.
Segen's Medical Dictionary. © 2012 Farlex, Inc. All rights reserved.
References in periodicals archive ?
Bronchial asthma is a chronic inflammatory airway disease characterized by airway inflammation, airway hyper-responsiveness (AHR) and airway wall remodeling (1).
To confirm the involvement of allergic pathophysiology in sleep apnea, we also determined the eosinophil count from the BAL samples; Th2-derived cytokines, together with eotaxin, play a critical role in the induction of airway hyperreactivity and the development of chronic airway wall remodeling [17].
Hence, HDM exposure contributes to inflammation and airway wall remodeling in a mechanism independent of the immune system by direct interaction with BSMC.
In COPD airway wall remodeling is known to be responsible for chronic airflow limitation, for the decline in lung function and for the relatively poor responses to available therapies (4).