title: Familial Alzheimer disease: decreases in CSF Abeta42 levels precede cognitive decline.
abstract: CSF amyloid beta-peptide 42 (Abeta42) levels in presymptomatic subjects with pathogenic mutations in the PS1 gene are significantly lower than in an age-matched control group. Consequently, in these subjects, there is a window of opportunity estimated as at least 4 to 12 years to evaluate the ability of any putative prophylactic therapy to decrease, arrest, or reverse abnormalities in Abeta42 metabolism many years before clinical symptoms of Alzheimer disease are otherwise likely to occur.
authors.affiliation: Department of Neurology, University of Massachusetts Medical School, 55 Lake Ave. N., Worcester, MA 01655, USA.
authors.forename: M
authors.initials: M
authors.lastname: Moonis
authors.forename: J M
authors.initials: JM
authors.lastname: Swearer
authors.forename: M P E
authors.initials: MP
authors.lastname: Dayaw
authors.forename: P
authors.initials: P
authors.lastname: St George-Hyslop
authors.forename: E
authors.initials: E
authors.lastname: Rogaeva
authors.forename: T
authors.initials: T
authors.lastname: Kawarai
authors.forename: D A
authors.initials: DA
authors.lastname: Pollen
mesh_terms: D000328:Adult; D000544:Alzheimer Disease / Q000134:cerebrospinal fluid* / Q000175:diagnosis / Q000235:genetics*; D016229:Amyloid beta-Peptides / Q000134:cerebrospinal fluid*; D001921:Brain / Q000378:metabolism* / Q000473:pathology / Q000503:physiopathology; D003072:Cognition Disorders / Q000134:cerebrospinal fluid* / Q000175:diagnosis / Q000235:genetics*; D004252:DNA Mutational Analysis; D018450:Disease Progression; D015536:Down-Regulation / Q000502:physiology; D005192:Family Health; D005260:Female; D020022:Genetic Predisposition to Disease / Q000235:genetics; D005820:Genetic Testing; D006579:Heterozygote; D006801:Humans; D008297:Male; D008565:Membrane Proteins / Q000235:genetics; D008875:Middle Aged; D009154:Mutation / Q000235:genetics; D010446:Peptide Fragments / Q000134:cerebrospinal fluid*; D011237:Predictive Value of Tests; D053764:Presenilin-1; D016875:tau Proteins / Q000134:cerebrospinal fluid
chemical_list: D016229:Amyloid beta-Peptides; D008565:Membrane Proteins; C508853:PSEN1 protein, human; D010446:Peptide Fragments; D053764:Presenilin-1; C075222:amyloid beta-protein (1-42); D016875:tau Proteins