White matter hyperintensities are no major confounder for alzheimer's disease cerebrospinal fluid biomarkers

van Waalwijk van Doorn, Linda J C, Ghafoorian, Mohsen, van Leijsen, Esther M C, Claassen, Jurgen A H R, Arighi, Andrea, Bozzali, Marco, Cannas, Jorge, Cavedo, Enrica, Eusebi, Paolo, Farotti, Lucia, Fenoglio, Chiara, Fortea, Juan, Frisoni, Giovanni B, Galimberti, Daniela, Greco, Viviana and others, (2020) White matter hyperintensities are no major confounder for alzheimer's disease cerebrospinal fluid biomarkers. Journal of Alzheimer's Disease. pp. 1-13. ISSN 1387-2877

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The cerebrospinal fluid (CSF) biomarkers amyloid-β 1–42 (Aβ 42), total and phosphorylated tau (t-tau, p-tau) are increasingly used to assist in the clinical diagnosis of Alzheimer’s disease (AD). However, CSF biomarker levels can be affected by confounding factors.

To investigate the association of white matter hyperintensities (WMHs) present in the brain with AD CSF biomarker levels.

We included CSF biomarker and magnetic resonance imaging (MRI) data of 172 subjects (52 controls, 72 mild cognitive impairment (MCI), and 48 AD patients) from 9 European Memory Clinics. A computer aided detection system for standardized automated segmentation of WMHs was used on MRI scans to determine WMH volumes. Association of WMH volume with AD CSF biomarkers was determined using linear regression analysis.

A small, negative association of CSF Aβ 42, but not p-tau and t-tau, levels with WMH volume was observed in the AD (r 2 = 0.084, p = 0.046), but not the MCI and control groups, which was slightly increased when including the distance of WMHs to the ventricles in the analysis (r 2 = 0.105, p = 0.025). Three global patterns of WMH distribution, either with 1) a low, 2) a peak close to the ventricles, or 3) a high, broadly-distributed WMH volume could be observed in brains of subjects in each diagnostic group.

Despite an association of WMH volume with CSF Aβ 42 levels in AD patients, the occurrence of WMHs is not accompanied by excess release of cellular proteins in the CSF, suggesting that WMHs are no major confounder for AD CSF biomarker assessment.

Item Type: Article
Keywords: Alzheimer’s disease, amyloid, biomarkers, cerebrospinal fluid, magnetic resonance imaging, tau proteins, white matter hyperintensities, white matter lesions
Schools and Departments: Brighton and Sussex Medical School > Neuroscience
SWORD Depositor: Mx Elements Account
Depositing User: Mx Elements Account
Date Deposited: 15 Dec 2020 07:54
Last Modified: 15 Dec 2020 08:00
URI: http://sro.sussex.ac.uk/id/eprint/95713

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