Aaron Gingerich1, Lan Pang1, Jarod Hanson1, Daniel Dlugolenski1, Rebecca Streich1, Eric R Lafontaine1, Tamás Nagy2, Ralph A Tripp1, Balázs Rada3. 1. Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, 501 D.W. Brooks Drive, Athens, GA, 30602, USA. 2. Department of Pathology, College of Veterinary Medicine, University of Georgia, 501 D.W. Brooks Drive, Athens, GA, 30602, USA. 3. Department of Infectious Diseases, College of Veterinary Medicine, University of Georgia, 501 D.W. Brooks Drive, Athens, GA, 30602, USA. radab@uga.edu.
Abstract
OBJECTIVE AND DESIGN: Our aim was to study whether an extracellular, oxidative antimicrobial mechanism inherent to tracheal epithelial cells is capable of inactivating influenza H1N2 virus. MATERIAL OR SUBJECTS: Epithelial cells were isolated from tracheas of male Sprague-Dawley rats. Both primary human and rat tracheobronchial epithelial cells were differentiated in air-liquid interface cultures. TREATMENT: A/swine/Illinois/02860/09 (swH1N2) influenza A virions were added to the apical side of airway cells for 1 h in the presence or absence of lactoperoxidase or thiocyanate. METHODS: Characterization of rat epithelial cells (morphology, Duox expression) occurred via western blotting, PCR, hydrogen peroxide production measurement and histology. The number of viable virions was determined by plaque assays. Statistical difference of the results was analyzed by ANOVA and Tukey's test. RESULTS: Our data show that rat tracheobronchial epithelial cells develop a differentiated, polarized monolayer with high transepithelial electrical resistance, mucin production and expression of dual oxidases. Influenza A virions are inactivated by human and rat epithelial cells via a dual oxidase-, lactoperoxidase- and thiocyanate-dependent mechanism. CONCLUSIONS: Differentiated air-liquid interface cultures of rat tracheal epithelial cells provide a novel model to study airway epithelium-influenza interactions. The dual oxidase/lactoperoxidase/thiocyanate extracellular oxidative system producing hypothiocyanite is a fast and potent anti-influenza mechanism inactivating H1N2 viruses prior to infection of the epithelium.
OBJECTIVE AND DESIGN: Our aim was to study whether an extracellular, oxidative antimicrobial mechanism inherent to tracheal epithelial cells is capable of inactivating influenzaH1N2 virus. MATERIAL OR SUBJECTS: Epithelial cells were isolated from tracheas of male Sprague-Dawley rats. Both primary human and rat tracheobronchial epithelial cells were differentiated in air-liquid interface cultures. TREATMENT: A/swine/Illinois/02860/09 (swH1N2) influenza A virions were added to the apical side of airway cells for 1 h in the presence or absence of lactoperoxidase or thiocyanate. METHODS: Characterization of rat epithelial cells (morphology, Duox expression) occurred via western blotting, PCR, hydrogen peroxide production measurement and histology. The number of viable virions was determined by plaque assays. Statistical difference of the results was analyzed by ANOVA and Tukey's test. RESULTS: Our data show that rat tracheobronchial epithelial cells develop a differentiated, polarized monolayer with high transepithelial electrical resistance, mucin production and expression of dual oxidases. Influenza A virions are inactivated by human and rat epithelial cells via a dual oxidase-, lactoperoxidase- and thiocyanate-dependent mechanism. CONCLUSIONS: Differentiated air-liquid interface cultures of rat tracheal epithelial cells provide a novel model to study airway epithelium-influenza interactions. The dual oxidase/lactoperoxidase/thiocyanate extracellular oxidative system producing hypothiocyanite is a fast and potent anti-influenza mechanism inactivating H1N2 viruses prior to infection of the epithelium.
Authors: Nuha Milad Ashtiwi; Demba Sarr; Tamás Nagy; Z Beau Reneer; Ralph A Tripp; Balázs Rada Journal: Front Immunol Date: 2022-05-18 Impact factor: 8.786
Authors: Demba Sarr; Aaron D Gingerich; Nuha Milad Asthiwi; Faris Almutairi; Giuseppe A Sautto; Jeffrey Ecker; Tamás Nagy; Matthew B Kilgore; Joshua D Chandler; Ted M Ross; Ralph A Tripp; Balázs Rada Journal: Proc Natl Acad Sci U S A Date: 2021-06-29 Impact factor: 11.205
Authors: Aaron D Gingerich; Fayhaa Doja; Rachel Thomason; Eszter Tóth; Jessica L Bradshaw; Martin V Douglass; Larry S McDaniel; Balázs Rada Journal: PLoS One Date: 2020-07-30 Impact factor: 3.240