title: Experimental induction of beta-amyloid plaques and cerebral angiopathy in primates.
abstract: Moderate numbers of amyloid plaques with associated argyrophilic dystrophic neurites and cerebral amyloid angiopathy (CAA) but no neurofibrillary tangles (NFTs) were found in the brains of 3 middle-aged common marmosets (Callithrix jacchus) inoculated intracerebrally (i.c.) 6-7 years earlier with brain tissue from a patient with early onset Alzheimer's disease. The plaques and vascular amyloid stained positively with antibodies to beta (A4)-protein. The brains of 3 age-matched control marmosets from the same colony did not show these neuropathological features. beta-amyloid plaques and CAA (but no spongiform encephalopathy) were also found in the brain of a marmoset inoculated with brain tissue from a patient with prion disease with concomitant beta-amyloid plaques and CAA. An occasional beta-amyloid plaque was found in the brains of two marmosets inoculated with brain tissue from elderly patients. No beta-amyloid plaques nor CAA were found in 6 other marmosets who were older than the inoculated marmosets, 10 further marmosets who were slightly younger but who had been inoculated several years previously with brain tissue which did not contain beta-amyloid, and 10 younger marmosets who had been subjected to various neurosurgical procedures. These results suggest that beta-amyloidosis is a transmissible process.
authors.affiliation: Division of Psychiatry, Clinical Research Centre, Harrow, United Kingdom.
authors.forename: H F
authors.initials: HF
authors.lastname: Baker
authors.forename: R M
authors.initials: RM
authors.lastname: Ridley
authors.forename: L W
authors.initials: LW
authors.lastname: Duchen
authors.forename: T J
authors.initials: TJ
authors.lastname: Crow
authors.forename: C J
authors.initials: CJ
authors.lastname: Bruton
mesh_terms: D000544:Alzheimer Disease / Q000378:metabolism / Q000473:pathology*; D016229:Amyloid beta-Peptides / Q000096:biosynthesis*; D000818:Animals; D001921:Brain / Q000378:metabolism / Q000473:pathology*; D016380:Brain Tissue Transplantation; D002144:Callithrix; D016657:Cerebral Amyloid Angiopathy / Q000378:metabolism / Q000473:pathology*; D006801:Humans; D014183:Transplantation, Heterologous
chemical_list: D016229:Amyloid beta-Peptides