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

David Wheeler, Veera Venkata Ratnam Bandaru, Peter Calabresi, Avindra Nath, Norman Haughey

Research output: Contribution to journalArticle

Abstract

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.

Original languageEnglish (US)
Pages (from-to)3092-3102
Number of pages11
JournalBrain
Volume131
Issue number11
DOIs
StatePublished - Nov 2008

Fingerprint

Sphingolipids
Multiple Sclerosis
Lipids
Myelin Sheath
Phospholipids
Electrospray Ionization Mass Spectrometry
Sterols
Tandem Mass Spectrometry
White Matter
Neurons
Membranes
Brain
Gray Matter

Keywords

  • Multiple sclerosis
  • Myelin
  • Phospholipid
  • Sphingolipid

ASJC Scopus subject areas

  • Clinical Neurology

Cite this

A defect of sphingolipid metabolism modifies the properties of normal appearing white matter in multiple sclerosis. / Wheeler, David; Bandaru, Veera Venkata Ratnam; Calabresi, Peter; Nath, Avindra; Haughey, Norman.

In: Brain, Vol. 131, No. 11, 11.2008, p. 3092-3102.

Research output: Contribution to journalArticle

Wheeler, David ; Bandaru, Veera Venkata Ratnam ; Calabresi, Peter ; Nath, Avindra ; Haughey, Norman. / A defect of sphingolipid metabolism modifies the properties of normal appearing white matter in multiple sclerosis. In: Brain. 2008 ; Vol. 131, No. 11. pp. 3092-3102.
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