Age-dependent inverse correlations in CSF and plasma amyloid-?(1-42) concentrations prior to amyloid plaque deposition in the brain of 3xTg-AD mice.

ABSTRACT: Amyloid-? (A?) plays a critical role as a biomarker in Alzheimer's disease (AD) diagnosis. In addition to its diagnostic potential in the brain, recent studies have suggested that changes of A? level in the plasma can possibly indicate AD onset. In this study, we found that plasma A?(1-42) concentration increases with age, while the concentration of A?(1-42) in the cerebrospinal fluid (CSF) decreases in APPswe, PS1M146V and TauP301L transgenic (3xTg-AD) mice, if measurements were made before formation of ThS-positive plaques in the brain. Our data suggests that there is an inverse correlations between the plasma and CSF A?(1-42) levels until plaques form in transgenic mice's brains and that the plasma A? concentration possesses the diagnostic potential as a biomarker for diagnosis of early AD stages.

SUBMITTER: Cho SM 

PROVIDER: S-EPMC4735736 | biostudies-literature | 2016 Feb

REPOSITORIES: biostudies-literature