Anomalous White Matter Structure and the Effect of Age in Down Syndrome Patients

Raquel Fenoll, Jesus Pujol, Susanna Esteba-Castillo, Susana De Sola, Núria Ribas-Vidal, Javier García-Alba, Gonzalo Sánchez-Benavides, Gerard Martínez-Vilavella, Joan Deus, Mara Dierssen, Ramón Novell-Alsina, Rafael De La Torre

Research output: Contribution to journalArticleResearchpeer-review

12 Citations (Scopus)

Abstract

© 2017 - IOS Press and the authors. All rights reserved. Background: Neural tissue alterations in Down syndrome are fully expressed at relatively late developmental stages. In addition, there is an early presence of neurodegenerative changes in the late life stages. Objective: The aims of this study were both to characterize white matter abnormalities in the brain of adult Down syndrome patients using diffusion tensor imaging (DTI) and to investigate whether degenerative alterations in white matter structure are detectable before dementia is clinically evident. Methods: Forty-five adult non-demented Down syndrome patients showing a wide age range (18-52 years) and a matched 45-subject control group were assessed. DTI fractional anisotropy (FA) brain maps were generated and selected cognitive tests were administered. Results: Compared with healthy controls, non-demented Down syndrome patients showed lower DTI FA in white matter involving the major pathways, but with more severe alterations in the frontal-subcortical circuits. White matter FA decreased with age at a similar rate in both DS and control groups. Conclusions: Our results contribute to characterizing the expression of white matter structural alterations in adult Down syndrome. However, an accelerated aging effect was not demonstrated, which may suggest that the FA measurements used are not sufficiently sensitive or, alternatively, age-related white matter neurodegeneration is not obvious prior to overt clinical dementia.
Original languageEnglish
Pages (from-to)61-70
JournalJournal of Alzheimer's Disease
Volume57
Issue number1
DOIs
Publication statusPublished - 1 Jan 2017

Keywords

  • Accelerated aging
  • diffusion tensor imaging
  • magnetic resonance imaging
  • neurodegeneration

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