title: Targeting the urokinase plasminogen activator receptor enhances gene transfer to human airway epithelia.
abstract: Developing gene therapy for cystic fibrosis has been hindered by limited binding and endocytosis of vectors by human airway epithelia. Here we show that the apical membrane of airway epithelia express the urokinase plasminogen activator receptor (uPAR). Urokinase plasminogen activator (uPA), or a 7-residue peptide derived from this protein (u7-peptide), bound the receptor and stimulated apical endocytosis. Both ligands enhanced gene transfer by nonspecifically bound adenovirus and adeno-associated virus vectors and by a modified adenovirus vector that had been coupled to the u7-peptide. These data provide the first evidence that targeting an apical receptor can circumvent the two most important barriers to gene transfer in airway epithelia. Thus, the uPA/uPAR system may offer significant advantages for delivering genes and other pharmaceuticals to airway epithelia.
authors.affiliation: Program in Gene Therapy, Howard Hughes Medical Institute, University of Iowa College of Medicine, Iowa City, Iowa 52242, USA.
authors.forename: P T
authors.initials: PT
authors.lastname: Drapkin
authors.forename: C R
authors.initials: CR
authors.lastname: O'Riordan
authors.forename: S M
authors.initials: SM
authors.lastname: Yi
authors.forename: J A
authors.initials: JA
authors.lastname: Chiorini
authors.forename: J
authors.initials: J
authors.lastname: Cardella
authors.forename: J
authors.initials: J
authors.lastname: Zabner
authors.forename: M J
authors.initials: MJ
authors.lastname: Welsh
mesh_terms: D000256:Adenoviridae / Q000235:genetics / Q000378:metabolism; D000818:Animals; D002478:Cells, Cultured; D003550:Cystic Fibrosis / Q000628:therapy; D004705:Endocytosis; D005434:Flow Cytometry; D005455:Fluorescent Antibody Technique; D018014:Gene Transfer Techniques; D015316:Genetic Therapy / Q000379:methods; D000882:Haplorhini; D006801:Humans; D008168:Lung / Q000378:metabolism*; D010446:Peptide Fragments / Q000494:pharmacology; D011485:Protein Binding; D011956:Receptors, Cell Surface / Q000187:drug effects*; D055293:Receptors, Urokinase Plasminogen Activator; D014568:Urokinase-Type Plasminogen Activator / Q000494:pharmacology
chemical_list: C524898:PLAUR protein, human; D010446:Peptide Fragments; D011956:Receptors, Cell Surface; D055293:Receptors, Urokinase Plasminogen Activator; D014568:Urokinase-Type Plasminogen Activator