Journal Article

A defect of sphingolipid metabolism modifies the properties of normal appearing white matter in multiple sclerosis

David Wheeler, Veera Venkata Ratnam Bandaru, Peter A. Calabresi, Avindra Nath and Norman J. Haughey

in Brain

Published on behalf of The Guarantors of Brain

Volume 131, issue 11, pages 3092-3102
Published in print November 2008 | ISSN: 0006-8950
Published online September 2008 | e-ISSN: 1460-2156 | DOI: http://dx.doi.org/10.1093/brain/awn190

Show Summary Details

Preview

Maintaining the appropriate complement and content of lipids in cellular membranes is critical for normal neural function. Accumulating evidence suggests that even subtle perturbations in the lipid content of neurons and myelin can disrupt their function and may contribute to myelin and axonal degradation. In this study, we determined the composition and quantified the content of lipids and sterols in normal appearing white matter (NAWM) and normal appearing grey matter (NAGM) from control and multiple sclerosis brain tissues by electrospray ionization tandem mass spectrometry. Our results suggest that in active-multiple sclerosis, there is a shift in the lipid composition of NAWM and NAGM to a higher phospholipid and lower sphingolipid content. We found that this disturbance in lipid composition was reduced in NAGM but not in NAWM of inactive-multiple sclerosis. The pattern of disturbance in lipid composition suggests a metabolic defect that causes sphingolipids to be shuttled to phospholipid production. Modelling the biophysical consequence of this change in lipid composition of NAWM indicated an increase in the repulsive force between opposing bilayers that could explain decompaction and disruption of myelin structure.

Keywords: multiple sclerosis; sphingolipid; phospholipid; myelin

Journal Article.  5038 words.  Illustrated.

Subjects: Neurology ; Neuroscience

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.