title: Microglial activation and beta -amyloid deposit reduction caused by a nitric oxide-releasing nonsteroidal anti-inflammatory drug in amyloid precursor protein plus presenilin-1 transgenic mice.
abstract: 3-4-(2-Fluoro-alpha-methyl-[1,1'-biphenyl]-4-acetyloxy)-3-methoxyphenyl]-2-propenoic acid 4-nitrooxy butyl ester (NCX-2216), a nitric oxide (NO)-releasing derivative of the cyclooxygenase-1-preferring nonsteroidal anti-inflammatory drug (NSAID) flurbiprofen, dramatically reduced both beta-amyloid (Abeta) loads and Congo red staining in doubly transgenic (Tg) amyloid precursor protein plus presenilin-1 mice when administered at 375 ppm in diet between 7 and 12 months of age. This reduction was associated with a dramatic increase in the number of microglia expressing major histocompatibility complex-II antigen, a marker for microglial activation. In contrast, ibuprofen at 375 ppm in diet caused modest reductions in Abeta load but not Congo red staining, suggesting that the effects of this nonselective NSAID were restricted primarily to nonfibrillar deposits. We detected no effects of the cyclooxygenase-2-selective NSAID celecoxib at 175 ppm on amyloid deposition. In short-term studies of 12-month-old Tg mice, we found that the microglia-activating properties of NCX-2216 (7.5 mg small middle dot kg(-1) small middle dot d(-1), s.c.) were present after 2 weeks of treatment. Microglia were not activated by NCX-2216 in non-Tg mice lacking Abeta deposits, nor were microglia activated in Tg animals by flurbiprofen (5 mg small middle dot kg(-1) small middle dot d(-1)) alone. These data are consistent with the argument that activated microglia can clear Abeta deposits. We conclude that the NO-generating component of NCX-2216 confers biological actions that go beyond those of typical NSAIDs. In conclusion, NCX-2216 is more efficacious than ibuprofen or celecoxib in clearing Abeta deposits from the brains of Tg mice, implying potential benefit in the treatment of Alzheimer's dementia.
authors.affiliation: Department of Pharmacology, Alzheimer's Research Laboratory, University of South Florida, Tampa, Florida 33612, USA.
authors.forename: Paul T
authors.initials: PT
authors.lastname: Jantzen
authors.forename: Karen E
authors.initials: KE
authors.lastname: Connor
authors.forename: Giovanni
authors.initials: G
authors.lastname: DiCarlo
authors.forename: Gary L
authors.initials: GL
authors.lastname: Wenk
authors.forename: John L
authors.initials: JL
authors.lastname: Wallace
authors.forename: Amyn M
authors.initials: AM
authors.lastname: Rojiani
authors.forename: Domenico
authors.initials: D
authors.lastname: Coppola
authors.forename: Dave
authors.initials: D
authors.lastname: Morgan
authors.forename: Marcia N
authors.initials: MN
authors.lastname: Gordon
mesh_terms: D000284:Administration, Oral; D000544:Alzheimer Disease / Q000188:drug therapy* / Q000378:metabolism / Q000473:pathology; D016229:Amyloid beta-Peptides / Q000378:metabolism*; D016564:Amyloid beta-Protein Precursor / Q000235:genetics*; D000818:Animals; D000894:Anti-Inflammatory Agents, Non-Steroidal / Q000008:administration & dosage*; D000943:Antigens, Differentiation / Q000096:biosynthesis; D000068579:Celecoxib; D002452:Cell Count; D004195:Disease Models, Animal; D004305:Dose-Response Relationship, Drug; D004334:Drug Administration Schedule; D004353:Drug Evaluation, Preclinical; D005480:Flurbiprofen / Q000008:administration & dosage / Q000031:analogs & derivatives; D005625:Frontal Lobe / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D006624:Hippocampus / Q000187:drug effects / Q000378:metabolism / Q000473:pathology; D000949:Histocompatibility Antigens Class II / Q000096:biosynthesis; D007052:Ibuprofen / Q000008:administration & dosage; D008565:Membrane Proteins / Q000235:genetics*; D051379:Mice; D008822:Mice, Transgenic; D017628:Microglia / Q000187:drug effects* / Q000378:metabolism / Q000473:pathology; D009569:Nitric Oxide / Q000378:metabolism; D053764:Presenilin-1; D011720:Pyrazoles; D013449:Sulfonamides / Q000008:administration & dosage; D016896:Treatment Outcome
chemical_list: C450321:(3-4-(2-fluoromethyl-(1,1'-biphenyl)-4-acetyloxy)-3-methoxyphenyl)-2-propenoic acid 4-nitrooxy butyl ester; D016229:Amyloid beta-Peptides; D016564:Amyloid beta-Protein Precursor; D000894:Anti-Inflammatory Agents, Non-Steroidal; D000943:Antigens, Differentiation; D000949:Histocompatibility Antigens Class II; D008565:Membrane Proteins; D053764:Presenilin-1; D011720:Pyrazoles; D013449:Sulfonamides; D009569:Nitric Oxide; D005480:Flurbiprofen; D000068579:Celecoxib; D007052:Ibuprofen