title: Decreased levels of soluble amyloid beta-protein precursor are associated with Alzheimer's disease in concordant and discordant monozygous twin pairs.
abstract: We conducted immunochemical measurements of soluble amyloid beta-protein precursor (beta PP) in cerebrospinal fluid (CSF) from three monozygous twin pairs. Two of the twin pairs are discordant for Alzheimer's disease and one pair showed concordance for Alzheimer's disease, which was confirmed neuropathologically. All affected individuals displayed substantially lower levels of soluble beta PP in CSF compared with the unaffected individuals. There were no differences in total protein levels in CSF samples from the affected twins compared with those of the unaffected twins. These studies suggest that decreased soluble beta PP in CSF may reflect neuropathological processes in Alzheimer's disease involving beta PP.
authors.affiliation: Salk Institute Biotechnology/Industrial Associates, Inc SIBIA, La Jolla, CA 92037.
authors.forename: S L
authors.initials: SL
authors.lastname: Wagner
authors.forename: E R
authors.initials: ER
authors.lastname: Peskind
authors.forename: D
authors.initials: D
authors.lastname: Nochlin
authors.forename: S
authors.initials: S
authors.lastname: Provow
authors.forename: J S
authors.initials: JS
authors.lastname: Farrow
authors.forename: M R
authors.initials: MR
authors.lastname: Pandian
authors.forename: M
authors.initials: M
authors.lastname: Cleveland
authors.forename: R K
authors.initials: RK
authors.lastname: Ito
authors.forename: M R
authors.initials: MR
authors.lastname: Farlow
mesh_terms: D000368:Aged; D000544:Alzheimer Disease / Q000134:cerebrospinal fluid* / Q000235:genetics*; D016564:Amyloid beta-Protein Precursor / Q000134:cerebrospinal fluid*; D004200:Diseases in Twins; D005260:Female; D006801:Humans; D014430:Twins, Monozygotic
chemical_list: D016564:Amyloid beta-Protein Precursor