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Influence of recombinant adenovirus on liver injury in endotoxicosis and its modulation by IL-10 expression
Caroline Oberholzer
Department of Surgery, University of Florida College of Medicine, Gainesville, Florida, USA
Andreas Oberholzer
Department of Surgery, University of Florida College of Medicine, Gainesville, Florida, USA
Sven K. Tschoeke
Department of Surgery, University of Florida College of Medicine, Gainesville, Florida, USA
Rebecca M. Minter
Department of Surgery, University of Florida College of Medicine, Gainesville, Florida, USA
Frances R. Bahjat
Department of Surgery, University of Florida College of Medicine, Gainesville, Florida, USA
Drake LaFace
Canjii Inc., San Diego, California, USA
Beth Hutchins
Canjii Inc., San Diego, California, USA
Lyle L. Moldawer
Department of Surgery, University of Florida College of Medicine, Gainesville, Florida, USA, moldawer{at}surgery.ufl.edu
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- -dependent liver injury. The aim of this study was to evaluate whether the systemic administration of recombinant adenovirus exacerbates a subsequent TNF- -dependent liver injury induced by D-galactosamine and lipopolysaccharide. Surprisingly, low-dose adenovirus administration (105 particles) protects, while high-dose adenovirus (1010 particles) is associated with an exaggerated hepatic inflammatory response from a subsequent D-galactosamine and lipopolysaccharide challenge. This exacerbation is TNF- 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- appearance and attenuates the increased hepatocyte injury. Taken together, this report demonstrates potential additive effects of TNF- 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.
Key Words: Gene therapy inflammation apoptosis cytokine lipopolysaccharide
Journal of Endotoxin Research, Vol. 10, No. 6,
393-401 (2004)
DOI: 10.1177/09680519040100060301

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