title: Adenovirus-mediated erythropoietin production by airway epithelia is enhanced by apical localization of the coxsackie-adenovirus receptor in vivo.
abstract: In well-differentiated human airway epithelia, the coxsackie B and adenovirus types 2 and 5 receptor (CAR) resides on the basolateral membrane. Replacing the transmembrane and cytoplasmic tail of CAR with a glycosyl-phosphatidylinositol anchor (GPI-CAR) allows apical localization of GPI-CAR, where it can bind adenovirus and enhance gene transfer in vitro. To test this hypothesis further and to investigate requirements and barriers we developed an in vivo model that quantitatively assesses gene transfer of erythropoietin (EPO) to mouse airway epithelia. Our data suggest that erythropoietin is secreted basolaterally, allowing possible access to the bloodstream. The data also suggest that basolateral adenovirus-mediated airway epithelia EPO secretion persists for long periods and could be used to study persistence in vivo. Additionally, the increase in hematocrit in response to the increased serum EPO could be used for therapeutic purposes. Finally, we tested the ability of apically localized CAR to enhance the infection of AdEPO in mouse airway epithelia in vivo. The data suggest that apical receptors in airway epithelia may be sufficient to improve adenovirus infection of airway epithelia in vivo.
authors.affiliation: Department of Internal Medicine, Roy J. and Lucille A. Carver College of Medicine, University of Iowa, 440 EMRB, Iowa City, IA 52242, USA.
authors.forename: Benjamin
authors.initials: B
authors.lastname: Davis
authors.forename: Jenny
authors.initials: J
authors.lastname: Nguyen
authors.forename: David
authors.initials: D
authors.lastname: Stoltz
authors.forename: Dayna
authors.initials: D
authors.lastname: Depping
authors.forename: Katherine J D
authors.initials: KJ
authors.lastname: Excoffon
authors.forename: Joseph
authors.initials: J
authors.lastname: Zabner
mesh_terms: D000256:Adenoviridae / Q000235:genetics*; D000818:Animals; D016764:Cell Polarity; D002478:Cells, Cultured; D062727:Coxsackie and Adenovirus Receptor-Like Membrane Protein; D004847:Epithelial Cells / Q000378:metabolism*; D004921:Erythropoietin / Q000096:biosynthesis* / Q000235:genetics; D018014:Gene Transfer Techniques; D017930:Genes, Reporter; D006400:Hematocrit; D006801:Humans; D008168:Lung / Q000378:metabolism; D008253:Macaca mulatta; D051379:Mice; D008810:Mice, Inbred C57BL; D011991:Receptors, Virus / Q000378:metabolism*; D020545:Respiratory Mucosa / Q000378:metabolism*
chemical_list: C568771:CLMP protein, human; C568772:CLMP protein, mouse; D062727:Coxsackie and Adenovirus Receptor-Like Membrane Protein; D011991:Receptors, Virus; D004921:Erythropoietin