Airway Epithelial KIF3A Regulates Th2 Responses to Aeroallergens

The Journal of Immunology : Official Journal of the American Association of Immunologists
Premkumar Vummidi GiridharJeffrey A Whitsett

Abstract

KIF3A, the gene encoding kinesin family member 3A, is a susceptibility gene locus associated with asthma; however, mechanisms by which KIF3A might influence the pathogenesis of the disorder are unknown. In this study, we deleted the mouse Kif3a gene in airway epithelial cells. Both homozygous and heterozygous Kif3a gene-deleted mice were highly susceptible to aeroallergens from Aspergillus fumigatus and the house dust mite, resulting in an asthma-like pathology characterized by increased goblet cell metaplasia, airway hyperresponsiveness, and Th2-mediated inflammation. Deletion of the Kif3a gene increased the severity of pulmonary eosinophilic inflammation and expression of cytokines (Il-4, Il-13, and Il-17a) and chemokine (Ccl11) RNAs following pulmonary exposure to Aspergillus extract. Inhibition of Kif3a disrupted the structure of motile cilia and impaired mucociliary clearance, barrier function, and epithelial repair, demonstrating additional mechanisms by which deficiency of KIF3A in respiratory epithelial cells contributes to pulmonary pathology. Airway epithelial KIF3A suppresses Th2 pulmonary inflammation and airway hyperresponsiveness following aeroallergen exposure, implicating epithelial microtubular functions in the...Continue Reading

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