Edinburgh Research Explorer

Age independently affects myelin integrity as detected by magnetization transfer magnetic resonance imaging in multiple sclerosis

Research output: Contribution to journalArticle

  • R D Newbould
  • R Nicholas
  • C L Thomas
  • R Quest
  • J S Z Lee
  • L Honeyfield
  • A Colasanti
  • O Malik
  • M Mattoscio
  • P M Matthews
  • M P Sormani
  • A D Waldman
  • P A Muraro

Related Edinburgh Organisations

Original languageEnglish
Pages (from-to)641-8
Number of pages8
JournalNeuroImage: Clinical
Volume4
Early online date31 Mar 2014
DOIs
Publication statusPublished - 2014

Abstract

BACKGROUND: Multiple sclerosis (MS) is a heterogeneous disorder with a progressive course that is difficult to predict on a case-by-case basis. Natural history studies of MS have demonstrated that age influences clinical progression independent of disease duration.

OBJECTIVE: To determine whether age would be associated with greater CNS injury as detected by magnetization transfer MRI.

MATERIALS AND METHODS: Forty MS patients were recruited from out-patient clinics into two groups stratified by age but with similar clinical disease duration as well as thirteen controls age-matched to the older MS group. Images were segmented by automated programs and blinded readers into normal appearing white matter (NAWM), normal appearing gray matter (NAGM), and white matter lesions (WMLs) and gray matter lesions (GMLs) in the MS groups. WML and GML were delineated on T2-weighted 3D fluid-attenuated inversion recovery (FLAIR) and T1 weighted MRI volumes. Mean magnetization transfer ratio (MTR), region volume, as well as MTR histogram skew and kurtosis were calculated for each region.

RESULTS: All MTR measures in NAGM and MTR histogram metrics in NAWM differed between MS subjects and controls, as expected and previously reported by several studies, but not between MS groups. However, MTR measures in the WML did significantly differ between the MS groups, in spite of no significant differences in lesion counts and volumes.

CONCLUSIONS: Despite matching for clinical disease duration and recording no significant WML volume difference, we demonstrated strong MTR differences in WMLs between younger and older MS patients. These data suggest that aging-related processes modify the tissue response to inflammatory injury and its clinical outcome correlates in MS.

    Research areas

  • Adult, Age Factors, Aging, Brain, Disability Evaluation, Female, Humans, Imaging, Three-Dimensional, Magnetic Resonance Imaging, Male, Middle Aged, Multiple Sclerosis, Myelin Sheath, ROC Curve, Journal Article, Research Support, Non-U.S. Gov't

ID: 45403615