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The temporal relationships between white matter hyperintensities, neurodegeneration, amyloid beta, and cognition.


ABSTRACT: Introduction:Cognitive decline in Alzheimer's disease is associated with amyloid beta (A?) accumulation, neurodegeneration, and cerebral small vessel disease, but the temporal relationships among these factors is not well established. Methods:Data included white matter hyperintensity (WMH) load, gray matter (GM) atrophy and Alzheimer's Disease Assessment Scale-Cognitive-Plus (ADAS13) scores for 720 participants and cerebrospinal fluid amyloid (A?1-42) for 461 participants from the Alzheimer's Disease Neuroimaging Initiative. Linear regressions were used to assess the relationships among baseline WMH, GM, and A?1-42 to changes in WMH, GM, A?1-42, and cognition at 1-year follow-up. Results:Baseline WMHs and A?1-42 predicted WMH increase and GM atrophy. Baseline WMHs and A?1-42 predicted worsening cognition. Only baseline A?1-42 predicted change in A?1-42. Discussion:Baseline WMHs lead to greater future GM atrophy and cognitive decline, suggesting that WM damage precedes neurodegeneration and cognitive decline. Baseline A?1-42 predicted WMH increase, suggesting a potential role of amyloid in WM damage.

SUBMITTER: Dadar M 

PROVIDER: S-EPMC7552231 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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The temporal relationships between white matter hyperintensities, neurodegeneration, amyloid beta, and cognition.

Dadar Mahsa M   Camicioli Richard R   Duchesne Simon S   Collins D Louis DL  

Alzheimer's & dementia (Amsterdam, Netherlands) 20201013 1


<h4>Introduction</h4>Cognitive decline in Alzheimer's disease is associated with amyloid beta (Aβ) accumulation, neurodegeneration, and cerebral small vessel disease, but the temporal relationships among these factors is not well established.<h4>Methods</h4>Data included white matter hyperintensity (WMH) load, gray matter (GM) atrophy and Alzheimer's Disease Assessment Scale-Cognitive-Plus (ADAS13) scores for 720 participants and cerebrospinal fluid amyloid (Aβ1-42) for 461 participants from the  ...[more]

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