title: An adenovirus vector with a chimeric fiber derived from canine adenovirus type 2 displays novel tropism.
abstract: Many clinically relevant tissues are refractory to Ad5 transduction because of negligible levels of the primary Ad5 receptor, the coxsackie and adenovirus receptor (CAR). Thus, development of Ad vectors that display CAR-independent tropism could lead directly to therapeutic gain. The Toronto strain of canine adenovirus type 2 (CAV2) exhibits native tropism that is augmented by, but not fully dependent upon, CAR for cellular transduction. We hypothesized that an Ad5 vector containing the nonhuman CAV2 knob would provide expanded tropism and constructed Ad5Luc1-CK, an E1-deleted Ad5 vector encoding the fiber knob domain from CAV2. Ad5Luc1-CK gene delivery to CAR-deficient cells was augmented up to 30-fold versus the Ad5 control vector, and correlated with increased cell surface binding. Further, we confirmed the importance of cellular integrins to Ad5Luc1-CK transduction. Herein, we present the rationale, design, purification, and characterization of a novel tropism modified, infectivity-enhanced Ad vector.
authors.affiliation: Division of Human Gene Therapy, Department of Medicine, University of Alabama at Birmingham Birmingham, AL 35294-2172, USA.
authors.forename: Joel N
authors.initials: JN
authors.lastname: Glasgow
authors.forename: Eric J
authors.initials: EJ
authors.lastname: Kremer
authors.forename: Akseli
authors.initials: A
authors.lastname: Hemminki
authors.forename: Gene P
authors.initials: GP
authors.lastname: Siegal
authors.forename: Joanne T
authors.initials: JT
authors.lastname: Douglas
authors.forename: David T
authors.initials: DT
authors.lastname: Curiel
mesh_terms: D006516:Adenoviruses, Canine / Q000502:physiology*; D000260:Adenoviruses, Human / Q000235:genetics*; D000818:Animals; D016466:CHO Cells; D002460:Cell Line; D062727:Coxsackie and Adenovirus Receptor-Like Membrane Protein; D006224:Cricetinae; D022761:Gene Transfer, Horizontal; D015316:Genetic Therapy; D005822:Genetic Vectors; D006801:Humans; D016023:Integrins / Q000502:physiology; D008156:Luciferases / Q000235:genetics; D011991:Receptors, Virus / Q000502:physiology; D011993:Recombinant Fusion Proteins / Q000235:genetics; D014161:Transduction, Genetic; D018523:Tropism
chemical_list: C568771:CLMP protein, human; D062727:Coxsackie and Adenovirus Receptor-Like Membrane Protein; D016023:Integrins; D011991:Receptors, Virus; D011993:Recombinant Fusion Proteins; D008156:Luciferases