Chemokine release from human rhinovirus-infected airway epithelial cells promotes fibroblast migration

The Journal of Allergy and Clinical Immunology
Christopher ShelfoonDavid Proud

Abstract

Thickening of the lamina reticularis, a feature of remodeling in the asthmatic airways, is now known to be present in young children who wheeze. Human rhinovirus (HRV) infection is a common trigger for childhood wheezing, which is a risk factor for subsequent asthma development. We hypothesized that HRV-infected epithelial cells release chemoattractants to recruit fibroblasts that could potentially contribute to thickening of the lamina reticularis. We sought to investigate whether conditioned medium from HRV-infected epithelial cells can trigger directed migration of fibroblasts. Human bronchial epithelial cells were exposed to medium alone or infected with HRV-16. Conditioned medium from both conditions were tested as chemoattractants for human bronchial fibroblasts in the xCELLigence cell migration apparatus. HRV-conditioned medium was chemotactic for fibroblasts. Treatment of fibroblasts with pertussis toxin, an inhibitor of Gαi-coupled receptors, prevented their migration. Production of epithelial chemoattractants required HRV replication. Multiplex analysis of epithelial supernatants identified CXCL10, CXCL8, and CCL5 as Gαi-coupled receptor agonists of potential interest. Subsequent analysis confirmed that fibroblasts ex...Continue Reading

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Dec 29, 2016·Current Opinion in Allergy and Clinical Immunology·Halie M Anderson, Daniel J Jackson
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