Association of plasma neurofilament light chain with microstructural white matter changes in Down syndrome

Association of plasma neurofilament light chain with microstructural white matter changes in Down syndrome

Abstract INTRODUCTION Both micro‐ and macrostructural white matter (WM) abnormalities, particularly those related to axonal degeneration, are associated with cognitive decline in adults with Down syndrome (DS) prior to a diagnosis of Alzheimer disease. Neurofilament light chain (NfL) is a support pr...

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Main Authors: Herminia Diana Rosas, Nathaniel David Mercaldo, Yasemin Hasimoglu, Melissa Petersen, Lydia R. Lewis, Florence Lai, David Powell, Asim Dhungana, Ali Demir, David Keater, Michael Yassa, Adam M. Brickman, Sid O'Bryant
Format: Article
Language:English
Published: Wiley 2024-10-01
Series:Alzheimer’s & Dementia: Diagnosis, Assessment & Disease Monitoring
Subjects:
Alzheimer's disease
diffusion weighted imaging
Down syndrome
white matter microstructural integrity
Online Access:https://doi.org/10.1002/dad2.70023
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Summary:Abstract INTRODUCTION Both micro‐ and macrostructural white matter (WM) abnormalities, particularly those related to axonal degeneration, are associated with cognitive decline in adults with Down syndrome (DS) prior to a diagnosis of Alzheimer disease. Neurofilament light chain (NfL) is a support protein within myelinated axons released into blood following axonal damage. In this study we investigated cross‐sectional relationships between WM microstructural changes as measured by diffusion tensor imaging (DTI) and plasma NfL concentration in adults with DS without dementia. METHODS Thirty cognitively stable (CS) adults with DS underwent diffusion‐weighted MRI scanning and plasma NfL measurement. DTI measures of select WM tracts were derived using automatic fiber tracking, and associations with plasma NfL were assessed using Spearman correlation coefficients. RESULTS Higher Plasma NfL was associated with greater altered diffusion measures of select tracts. DISCUSSION Early increases in plasma NfL may reflect early white matter microstructural changes prior to dementia in DS. Highlights The onset of such WM changes in DS has not yet been widely studied. WM microstructural properties correlated with plasma neurofilament light chain (NfL). NfL may reflect early, selective WM changes in adults with DS at high risk of developing AD.
ISSN:2352-8729

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