title: Intracranial adeno-associated virus-mediated delivery of anti-pan amyloid beta, amyloid beta40, and amyloid beta42 single-chain variable fragments attenuates plaque pathology in amyloid precursor protein mice.
abstract: Accumulation of amyloid beta protein (Abeta) aggregates is hypothesized to trigger a pathological cascade that causes Alzheimer's disease (AD). Active or passive immunizations targeting Abeta are therefore of great interest as potential therapeutic strategies. We have evaluated the use of recombinant anti-Abeta single-chain variable fragments (scFvs) as a potentially safer form of anti-Abeta immunotherapy. We have generated and characterized three anti-Abeta scFvs that recognize Abeta 1-16, Abeta x-40, or Abeta x-42. To achieve widespread brain delivery, constructs expressing these anti-Abeta scFvs were packaged into adeno-associated virus (AAV) vectors and injected into the ventricles of postnatal day 0 (P0) amyloid precursor protein CRND8-transgenic mice. Intracranial delivery of AAV to neonatal mice resulted in widespread neuronal delivery. In situ expression of each of the anti-Abeta scFvs after intracerebroventricular AAV serotype 1 delivery to P0 pups decreased Abeta deposition by 25-50%. These data suggest that intracranial anti-Abeta scFv expression is an effective strategy to attenuate amyloid deposition. As opposed to transgenic approaches, these studies also establish a "somatic brain transgenic" paradigm to rapidly and cost-effectively evaluate potential modifiers of AD-like pathology in AD mouse models.
authors.affiliation: Department of Neuroscience, Mayo Clinic, Mayo Clinic College of Medicine, Jacksonville, Florida 32224, USA.
authors.forename: Yona
authors.initials: Y
authors.lastname: Levites
authors.forename: Karen
authors.initials: K
authors.lastname: Jansen
authors.forename: Lisa A
authors.initials: LA
authors.lastname: Smithson
authors.forename: Rachel
authors.initials: R
authors.lastname: Dakin
authors.forename: Vallie M
authors.initials: VM
authors.lastname: Holloway
authors.forename: Pritam
authors.initials: P
authors.lastname: Das
authors.forename: Todd E
authors.initials: TE
authors.lastname: Golde
mesh_terms: D000544:Alzheimer Disease / Q000276:immunology / Q000503:physiopathology / Q000628:therapy*; D016229:Amyloid beta-Peptides / Q000037:antagonists & inhibitors* / Q000276:immunology / Q000633:toxicity; D016564:Amyloid beta-Protein Precursor / Q000235:genetics / Q000378:metabolism; D000818:Animals; D000831:Animals, Newborn; D000906:Antibodies / Q000737:chemistry / Q000276:immunology*; D001921:Brain / Q000187:drug effects / Q000276:immunology / Q000503:physiopathology; D000229:Dependovirus / Q000276:immunology*; D004195:Disease Models, Animal; D005260:Female; D015316:Genetic Therapy / Q000379:methods*; D007135:Immunoglobulin Variable Region / Q000737:chemistry / Q000235:genetics / Q000276:immunology; D007276:Injections, Intraventricular; D008297:Male; D051379:Mice; D008817:Mice, Mutant Strains; D008822:Mice, Transgenic; D009474:Neurons / Q000187:drug effects / Q000276:immunology / Q000473:pathology; D010446:Peptide Fragments / Q000037:antagonists & inhibitors / Q000737:chemistry / Q000235:genetics / Q000276:immunology / Q000633:toxicity; D058225:Plaque, Amyloid / Q000276:immunology* / Q000473:pathology; D016896:Treatment Outcome
chemical_list: D016229:Amyloid beta-Peptides; D016564:Amyloid beta-Protein Precursor; D000906:Antibodies; D007135:Immunoglobulin Variable Region; D010446:Peptide Fragments; C078592:amyloid beta-protein (1-40); C075222:amyloid beta-protein (1-42)