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Published in: The Journal of Headache and Pain 1/2018

Open Access 01-12-2018 | Research article

Increased thalamic glutamate/glutamine levels in migraineurs

Authors: Adina Bathel, Lauren Schweizer, Philipp Stude, Benjamin Glaubitz, Niklas Wulms, Sibel Delice, Tobias Schmidt-Wilcke

Published in: The Journal of Headache and Pain | Issue 1/2018

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Abstract

Background

Increased cortical excitability has been hypothesized to play a critical role in various neurological disorders, such as restless legs syndrome, epilepsy and migraine. Particularly for migraine, local hyperexcitability has been reported. Levels of regional excitatory and inhibitory neurotransmitters are related to cortical excitability and hence may play a role in the origin of the disease. Consequently, a mismatch of the excitatory-inhibitory neurotransmitter network might contribute to local hyperexcitability and the onset of migraine attacks. In this study we sought to assess local levels of glutamate / glutamine (GLX) and gamma-aminobutyric acid (GABA) in the occipital cortex and right thalamus of migraineurs and healthy subjects.

Methods

We measured interictally local biochemical concentrations in the occipital lobe and the right thalamus in patients with migraine (without aura) and healthy controls (HCs) using proton magnetic resonance spectroscopy at 3 T. GLX levels were acquired using PRESS and GABA levels using the GABA-sensitive editing sequence MEGA-PRESS. Regional GLX and GABA levels were compared between groups.

Results

Statistical analyses revealed significantly increased GLX levels in both the primary occipital cortex and thalamus. However, we found no group differences in GABA levels for these two regions. Correlation analyses within the migraine group revealed no significant correlations between pain intensity and levels of GLX or GABA in either of the two brain regions.

Conclusions

Further research is needed to investigate the role of GABA/GLX ratios in greater depth and to measure changes in neurotransmitter levels over time, i.e. during migraine attacks and interictally.
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Metadata
Title
Increased thalamic glutamate/glutamine levels in migraineurs
Authors
Adina Bathel
Lauren Schweizer
Philipp Stude
Benjamin Glaubitz
Niklas Wulms
Sibel Delice
Tobias Schmidt-Wilcke
Publication date
01-12-2018
Publisher
Springer Milan
Published in
The Journal of Headache and Pain / Issue 1/2018
Print ISSN: 1129-2369
Electronic ISSN: 1129-2377
DOI
https://doi.org/10.1186/s10194-018-0885-8

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