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Plasma amyloid beta-peptide 1-42 and incipient Alzheimer's disease.

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By Mayeux R, Tang MX, Jacobs DM, Manly J, Bell K, Mer • www.ProHealth.com • September 1, 1999


Mutations in the amyloid precursor protein and presenilin 1 and 2 genes result in elevated plasma levels of the amyloid beta-peptide species terminating at amino acid residue 42 (A beta1-42). In a longitudinal study of unrelated elderly individuals, those who subsequently developed Alzheimer's disease had higher plasma levels of A beta1-42 at entry than did those who remained free of dementia. The results indicate that elevated plasma levels of the released A beta peptide A beta1-42 may be detected several years before the onset of symptoms, supporting that extracellular A beta1-42 plays an important role in the pathogenesis of late-onset Alzheimer's disease.

Source: Ann Neurol 1999 Sep;46(3):412-6
PMID: 10482274, UI: 99410000

(Taub Alzheimer's Disease Research Center, Staten Island, NY, USA. )




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