Title | Pellino-1 Regulates the Responses of the Airway to Viral Infection. | ||
Author | Marsh, Elizabeth K; Prestwich, Elizabeth C; Williams, Lynne; Hart, Amber R; Muir, Clare F; Parker, Lisa C; Jonker, Marnix R; Heijink, Irene H; Timens, Wim; Fife, Mark; Hussell, Tracy; Hershenson, Marc B; Bentley, J Kelley; Sun, Shao-Cong; Barksby, Ben S; Borthwick, Lee A; Stewart, James P; Sabroe, Ian; Dockrell, David H; Marriott, Helen M | ||
Journal | Front Cell Infect Microbiol | Publication Year/Month | 2020 |
PMID | 32984077 | PMCID | PMC7488214 |
Affiliation + expend | 1.Department of Infection, Immunity and Cardiovascular Disease, Faculty of Medicine, Dentistry and Health, University of Sheffield, Sheffield, United Kingdom. |
Exposure to respiratory pathogens is a leading cause of exacerbations of airway diseases such as asthma and chronic obstructive pulmonary disease (COPD). Pellino-1 is an E3 ubiquitin ligase known to regulate virally-induced inflammation. We wished to determine the role of Pellino-1 in the host response to respiratory viruses in health and disease. Pellino-1 expression was examined in bronchial sections from patients with GOLD stage two COPD and healthy controls. Primary bronchial epithelial cells (PBECs) in which Pellino-1 expression had been knocked down were extracellularly challenged with the TLR3 agonist poly(I:C). C57BL/6 Peli1 (-/-) mice and wild type littermates were subjected to intranasal infection with clinically-relevant respiratory viruses: rhinovirus (RV1B) and influenza A. We found that Pellino-1 is expressed in the airways of normal subjects and those with COPD, and that Pellino-1 regulates TLR3 signaling and responses to airways viruses. In particular we observed that knockout of Pellino-1 in the murine lung resulted in increased production of proinflammatory cytokines IL-6 and TNFalpha upon viral infection, accompanied by enhanced recruitment of immune cells to the airways, without any change in viral replication. Pellino-1 therefore regulates inflammatory airway responses without altering replication of respiratory viruses.