title: Local gene delivery of heme oxygenase-1 by adeno-associated virus into osteoarthritic mouse joints exhibiting synovial oxidative stress.
abstract: OBJECTIVE
  To evaluate the role of synovial oxidative stress on joint pathology in a spontaneous mouse model of osteoarthritis (OA) by intra-articular (IA) delivery of recombinant adeno-associated virus (rAAV) expressing anti-oxidant protein heme oxygenase-1 (HO-1).
  
  
  METHODS
  Joint transduction by rAAV vectors was evaluated with serotype 1, 2, 5 and 8 capsids carrying LacZ gene administered by IA injections into STR/ort mice. Transduced cell types were identified by β-galactosidase staining in sectioned joints. Effect of oxidative stress on AAV transduction of primary synoviocytes in vitro was quantitated by fluorescence-activated cell sorting (FACS) analysis. In vivo, the efficacy of rAAV1/HO-1 was tested by IA administration into STR/ort mice followed by histopathological scoring of cartilage. Levels of 3-nitrotyrosine (3-NT) and HO-1 were assessed by immunohistochemistry (IHC) of joint sections.
  
  
  RESULTS
  Administration of a rAAV1 based vector into OA mouse joints resulted in transduction of the synovium, joint capsule, adipocytes and skeletal muscle while none of the serotypes showed significant cartilage transduction. All OA joints exhibited significantly elevated levels of oxidative stress marker, 3-NT, in the synovium compared to OA-resistant CBA-strain of mice. In vitro studies demonstrated that AAV transgene expression in primary synoviocytes was augmented by oxidative stress induced by H(2)O(2) and that a rAAV expressing HO-1 reduced the levels of oxidative stress. In vivo, HO-1 was increased in the synovium of STR/ort mice. However, delivery of rAAV1/HO-1 into OA joints did not reduce cartilage degradation.
  
  
  CONCLUSIONS
  AAV-mediated HO-1 delivery into OA joints during active disease was not sufficient to improve cartilage pathology in this model.
authors.affiliation: Molecular Biology, Genzyme, A Sanofi Company, Framingham, MA 01701, USA. sirkka.kyostio-moore@genzyme.com
authors.forename: S
authors.initials: S
authors.lastname: Kyostio-Moore
authors.forename: D S
authors.initials: DS
authors.lastname: Bangari
authors.forename: P
authors.initials: P
authors.lastname: Ewing
authors.forename: B
authors.initials: B
authors.lastname: Nambiar
authors.forename: P
authors.initials: P
authors.lastname: Berthelette
authors.forename: C
authors.initials: C
authors.lastname: Sookdeo
authors.forename: E
authors.initials: E
authors.lastname: Hutto
authors.forename: N
authors.initials: N
authors.lastname: Moran
authors.forename: J
authors.initials: J
authors.lastname: Sullivan
authors.forename: G L
authors.initials: GL
authors.lastname: Matthews
authors.forename: A
authors.initials: A
authors.lastname: Scaria
authors.forename: D
authors.initials: D
authors.lastname: Armentano
mesh_terms: D000818:Animals; D016723:Bone Remodeling / Q000187:drug effects / Q000502:physiology; D000229:Dependovirus / Q000235:genetics*; D004195:Disease Models, Animal; D018014:Gene Transfer Techniques; D051547:Heme Oxygenase-1 / Q000235:genetics* / Q000378:metabolism; D006861:Hydrogen Peroxide / Q000009:adverse effects / Q000494:pharmacology; D066298:In Vitro Techniques; D007270:Injections, Intra-Articular; D007596:Joints / Q000378:metabolism* / Q000473:pathology; D008297:Male; D008565:Membrane Proteins / Q000235:genetics* / Q000378:metabolism; D051379:Mice; D008808:Mice, Inbred CBA; D008815:Mice, Inbred Strains; D008817:Mice, Mutant Strains; D010003:Osteoarthritis / Q000378:metabolism* / Q000473:pathology; D018384:Oxidative Stress / Q000187:drug effects / Q000502:physiology*; D013583:Synovial Membrane / Q000378:metabolism* / Q000473:pathology; D014161:Transduction, Genetic; D014443:Tyrosine / Q000031:analogs & derivatives / Q000378:metabolism
chemical_list: D008565:Membrane Proteins; C002744:3-nitrotyrosine; D014443:Tyrosine; D006861:Hydrogen Peroxide; D051547:Heme Oxygenase-1; C496542:Hmox1 protein, mouse