title: Influence of recombinant adenovirus on liver injury in endotoxicosis and its modulation by IL-10 expression.
abstract: Adenovirus-based gene therapy offers a unique opportunity to target gene expression to the liver by systemic delivery. However, systemic administration of a first generation adenoviral construct elicits an inflammatory response leading to TNF-alpha-dependent liver injury. The aim of this study was to evaluate whether the systemic administration of recombinant adenovirus exacerbates a subsequent TNF-alpha-dependent liver injury induced by D-galactosamine and lipopolysaccharide. Surprisingly, low-dose adenovirus administration (10(5) particles) protects, while high-dose adenovirus (10(10) particles) is associated with an exaggerated hepatic inflammatory response from a subsequent D-galactosamine and lipopolysaccharide challenge. This exacerbation is TNF-alpha dependent, since treatment with a TNF inhibitor fully protects against the liver injury. Moreover, intravenous administration of an adenoviral construct expressing the anti-inflammatory protein interleukin-10 reduces TNF-alpha appearance and attenuates the increased hepatocyte injury. Taken together, this report demonstrates potential additive effects of TNF-alpha responses induced by adenovirus and other inflammatory signals, and suggests that the response can be mitigated by relative adenovirus particle dose or by inhibitors, such as TNF-binding protein or interleukin 10.
authors.affiliation: Department of Surgery, University of Florida College of Medicine, Gainesville, Florida 32610-0286, USA.
authors.forename: Caroline
authors.initials: C
authors.lastname: Oberholzer
authors.forename: Andreas
authors.initials: A
authors.lastname: Oberholzer
authors.forename: Sven K
authors.initials: SK
authors.lastname: Tschoeke
authors.forename: Rebecca M
authors.initials: RM
authors.lastname: Minter
authors.forename: Frances R
authors.initials: FR
authors.lastname: Bahjat
authors.forename: Drake
authors.initials: D
authors.lastname: LaFace
authors.forename: Beth
authors.initials: B
authors.lastname: Hutchins
authors.forename: Lyle L
authors.initials: LL
authors.lastname: Moldawer
mesh_terms: D000256:Adenoviridae / Q000235:genetics* / Q000276:immunology; D000818:Animals; D017209:Apoptosis / Q000187:drug effects; D056486:Chemical and Drug Induced Liver Injury; D004306:Dose-Response Relationship, Immunologic; D005260:Female; D015316:Genetic Therapy; D005822:Genetic Vectors / Q000008:administration & dosage / Q000627:therapeutic use; D007274:Injections, Intraperitoneal; D016753:Interleukin-10 / Q000235:genetics / Q000378:metabolism; D008070:Lipopolysaccharides / Q000008:administration & dosage / Q000633:toxicity*; D008099:Liver / Q000187:drug effects / Q000473:pathology; D008107:Liver Diseases / Q000473:pathology / Q000628:therapy*; D051379:Mice; D008810:Mice, Inbred C57BL; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism
chemical_list: D008070:Lipopolysaccharides; D014409:Tumor Necrosis Factor-alpha; C482199:lipopolysaccharide, E coli O55-B5; D016753:Interleukin-10