title: Host resistance to lung infection mediated by major vault protein in epithelial cells.
abstract: The airway epithelium plays an essential role in innate immunity to lung pathogens. Ribonucleoprotein particles primarily composed of major vault protein (MVP) are highly expressed in cells that encounter xenobiotics. However, a clear biologic function for MVP is not established. We report here that MVP is rapidly recruited to lipid rafts when human lung epithelial cells are infected with Pseudomonas aeruginosa, and maximal recruitment is dependent on bacterial binding to the cystic fibrosis transmembrane conductance regulator. MVP was also essential for optimal epithelial cell internalization and clearance of P. aeruginosa. These results suggest that MVP makes a substantial contribution to epithelial cell-mediated resistance to infection.
authors.affiliation: Channing Laboratory, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA.
authors.forename: Michael P
authors.initials: MP
authors.lastname: Kowalski
authors.forename: Anne
authors.initials: A
authors.lastname: Dubouix-Bourandy
authors.forename: Milan
authors.initials: M
authors.lastname: Bajmoczi
authors.forename: David E
authors.initials: DE
authors.lastname: Golan
authors.forename: Tanweer
authors.initials: T
authors.lastname: Zaidi
authors.forename: Yamara S
authors.initials: YS
authors.lastname: Coutinho-Sledge
authors.forename: Melanie P
authors.initials: MP
authors.lastname: Gygi
authors.forename: Steven P
authors.initials: SP
authors.lastname: Gygi
authors.forename: Erik A C
authors.initials: EA
authors.lastname: Wiemer
authors.forename: Gerald B
authors.initials: GB
authors.lastname: Pier
mesh_terms: D000818:Animals; D019005:Cystic Fibrosis Transmembrane Conductance Regulator / Q000235:genetics / Q000378:metabolism; D004847:Epithelial Cells / Q000378:metabolism / Q000382:microbiology; D006801:Humans; D007113:Immunity, Innate; D008168:Lung / Q000276:immunology / Q000382:microbiology; D008171:Lung Diseases / Q000276:immunology* / Q000378:metabolism / Q000382:microbiology; D021962:Membrane Microdomains / Q000378:metabolism; D051379:Mice; D011552:Pseudomonas Infections / Q000276:immunology* / Q000378:metabolism / Q000382:microbiology; D011550:Pseudomonas aeruginosa / Q000276:immunology* / Q000378:metabolism; D034741:RNA, Small Interfering / Q000235:genetics; D020545:Respiratory Mucosa / Q000276:immunology / Q000378:metabolism* / Q000382:microbiology*; D015398:Signal Transduction; D020394:Vault Ribonucleoprotein Particles / Q000502:physiology*; D000099187:Major Vault Protein
chemical_list: D019005:Cystic Fibrosis Transmembrane Conductance Regulator; D034741:RNA, Small Interfering; D020394:Vault Ribonucleoprotein Particles; D000099187:Major Vault Protein