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Longitudinal changes in rich club organization and cognition in cerebral small vessel disease.

Abstract：

:Cerebral small vessel disease (SVD) is considered the most important vascular contributor to the development of cognitive impairment and dementia. There is increasing awareness that SVD exerts its clinical effects by disrupting white matter connections, predominantly disrupting connections between rich club nodes, a set of highly connected and interconnected regions. Here we examined the progression of disturbances in rich club organization in older adults with SVD and their associations with conventional SVD markers and cognitive decline. We additionally investigated associations of baseline network measures with dementia. In 270 participants of the RUN DMC study, we performed diffusion tensor imaging (DTI) and cognitive assessments longitudinally. Rich club organization was examined in structural networks derived from DTI followed by deterministic tractography. Global efficiency (p<0.05) and strength of rich club connections (p<0.001) declined during follow-up. Decline in strength of peripheral connections was associated with a decline in overall cognition (β=0.164; p<0.01), psychomotor speed (β=0.151; p<0.05) and executive function (β=0.117; p<0.05). Baseline network measures were reduced in participants with dementia, and the association between WMH and dementia was causally mediated by global efficiency (p = =0.037) and peripheral connection strength (p = =0.040). SVD-related disturbances in rich club organization progressed over time, predominantly in participants with severe SVD. In this study, we found no specific role of rich club connectivity disruption in causing cognitive decline or dementia. The effect of WMH on dementia was mediated by global network efficiency and the strength of peripheral connections, suggesting an important role for network disruption in causing cognitive decline and dementia in older adults with SVD.

journal_name

Neuroimage Clin

journal_title

NeuroImage. Clinical

authors

van Leijsen EMC,van Uden IWM,Bergkamp MI,van der Holst HM,Norris DG,Claassen JAHR,Kessels RPC,de Leeuw FE,Tuladhar AM

doi

10.1016/j.nicl.2019.102048

subject

Has Abstract

pub_date

2019-01-01 00:00:00

pages

102048

issn

2213-1582

pii

S2213-1582(19)30395-X

journal_volume

24

pub_type

杂志文章

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