Cerebral amyloid burden is associated with white matter hyperintensity location in specific posterior white matter regions

[摘要] White matter hyperintensities (WMHs) are a common manifestation of cerebral small vessel disease. WMHs are also frequently observed in patients with familial and sporadic Alzheimer's disease, often with a particular posterior predominance. Whether amyloid and tau pathologies are linked to WMH occurrence is still debated. We examined whether cerebral amyloid and tau burden, reflected in cerebrospinal fluid amyloid-beta 1-42 (A beta-42) and phosphorylated tau (p-tau), are related to WMH location in a cohort of 517 memory clinic patients. Two lesion mapping techniques were performed: voxel-based analyses and region of interest-based linear regression. Voxelwise associations were found between lower (A beta-42) and parieto-occipital periventricular WMHs. Regression analyses demonstrated that lower A beta-42 correlated with larger WMH volumes in the splenium of the corpus callosum and posterior thalamic radiation, also after controlling for markers of vascular disease. P-tau was not consistently related to WMH occurrence. Our findings indicate that cerebral amyloid burden is associated with WMHs located in specific posterior white matter regions, possibly reflecting region-specific effects of amyloid pathology on the white matter. (C) 2019 The Authors. Published by Elsevier Inc.

[发布日期] 2019-12-01

[关键词] Alzheimer's disease;Cerebrospinal fluid;Amyloid-beta;Tau;White matter hyperintensities;Magnetic resonance imaging;Lesion mapping