title: Reduction of arthritis following intra-articular administration of an adeno-associated virus serotype 5 expressing a disease-inducible TNF-blocking agent.
abstract: BACKGROUND
  In the context of preclinical development, we studied the potential of intra-articular gene delivery using a recombinant adeno-associated virus 5 (rAAV5) encoding a chimeric human tumour necrosis factoralpha (TNFalpha) soluble receptor I linked to a mouse immunoglobulin heavy chain Fc portion (TNF receptor I; TNFRI-Ig).
  
  
  METHODS
  Expression was under control of a nuclear factor kappa B (NFkappaB)-responsive promoter and compared with a cytomegalovirus (CMV) promoter (rAAV5.NFkappaB-TNFRI-Ig and rAAV5.CMV-TNFRI-Ig, respectively).
  
  
  RESULTS
  Fibroblast-like synoviocytes transduced in vitro with rAAV5.NFkappaB-TNFRI-Ig were able to produce TNFRI-Ig protein in response to several stimuli, and this was inhibited upon treatment with a specific NFkappaB blocking agent. A bioassay revealed that the synthesised TNFRI-Ig was bioactive, showing a higher affinity for human than for rat TNFalpha. Transcription of the transgene and protein production were detectable in joints injected with both constructs. No dissemination of the vector was observed outside the joints. A significant reduction in paw swelling was seen in rats treated with rAAV5.NFkappaB-TNFRI-Ig. This clinical effect was accompanied by a decrease in pro-inflammatory cytokine levels and an increase in IL10 expression in the synovium.
  
  
  CONCLUSIONS
  These results provide evidence that intra-articular gene therapy using rAAV5 encoding TNFRI-Ig may be a safe and feasible approach for the treatment of rheumatoid arthritis. The higher affinity for human TNFalpha suggests that in patients with rheumatoid arthritis the therapeutic effect might be even more pronounced than in rat adjuvant arthritis.
authors.affiliation: Division of Clinical Immunology and Rheumatology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands.
authors.forename: J
authors.initials: J
authors.lastname: Adriaansen
authors.forename: M
authors.initials: M
authors.lastname: Khoury
authors.forename: C J
authors.initials: CJ
authors.lastname: de Cortie
authors.forename: F J
authors.initials: FJ
authors.lastname: Fallaux
authors.forename: P
authors.initials: P
authors.lastname: Bigey
authors.forename: D
authors.initials: D
authors.lastname: Scherman
authors.forename: D J
authors.initials: DJ
authors.lastname: Gould
authors.forename: Y
authors.initials: Y
authors.lastname: Chernajovsky
authors.forename: F
authors.initials: F
authors.lastname: Apparailly
authors.forename: C
authors.initials: C
authors.lastname: Jorgensen
authors.forename: M J B M
authors.initials: MJ
authors.lastname: Vervoordeldonk
authors.forename: P P
authors.initials: PP
authors.lastname: Tak
mesh_terms: D000818:Animals; D001169:Arthritis, Experimental / Q000276:immunology / Q000628:therapy*; D016207:Cytokines / Q000276:immunology; D000229:Dependovirus / Q000235:genetics* / Q000276:immunology; D004797:Enzyme-Linked Immunosorbent Assay; D015870:Gene Expression; D005818:Genetic Engineering; D015316:Genetic Therapy / Q000379:methods*; D005822:Genetic Vectors / Q000008:administration & dosage* / Q000235:genetics; D006801:Humans; D007142:Immunoglobulin gamma-Chains / Q000032:analysis / Q000235:genetics*; D007150:Immunohistochemistry; D007270:Injections, Intra-Articular; D007596:Joints / Q000276:immunology; D008297:Male; D012333:RNA, Messenger / Q000032:analysis; D051381:Rats; D011917:Rats, Inbred Lew; D018124:Receptors, Tumor Necrosis Factor / Q000032:analysis / Q000235:genetics*; D011993:Recombinant Fusion Proteins / Q000032:analysis / Q000235:genetics; D020133:Reverse Transcriptase Polymerase Chain Reaction; D014161:Transduction, Genetic / Q000379:methods*; D019076:Transgenes
chemical_list: D016207:Cytokines; D007142:Immunoglobulin gamma-Chains; D012333:RNA, Messenger; D018124:Receptors, Tumor Necrosis Factor; D011993:Recombinant Fusion Proteins; C099374:Ro 45-2081