Stress hormone corticosterone enhances susceptibility to cortical spreading depression in familial hemiplegic migraine type 1 mutant mice

Reinald Shyti, Katharina Eikermann-Haerter, Sandra H. van Heiningen, Onno C. Meijer, Cenk Ayata, Marian Joels, Michel D. Ferrari, Arn M. J. M. van den Maagdenberg, Else A. Tolner*

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

20 Citations (Scopus)

Abstract

Stress is a putative migraine trigger, but the pathogenic mechanisms involved are unknown. Stress and stress hormones increase neuronal excitability by enhancing glutamatergic neurotransmission, but inhibitory effects have also been reported. We hypothesise that an acute rise in stress hormones, such as corticosteroids which are released after stress, increase neuronal excitability and thereby may increase susceptibility to cortical spreading depression (CSD), the mechanism underlying the migraine aura. Here we investigated effects of acute restraint stress and of the stress hormone corticosterone on CSD susceptibility as surrogate migraine marker, in a transgenic mouse model of familial hemiplegic migraine type 1 (FHM1), which displays increased glutamatergic cortical neurotransmission and increased propensity for CSD. We found that 20-min and 3-h restraint stress did not influence CSD susceptibility in mutant or wild-type mice, despite elevated levels of plasma corticosterone. By contrast, subcutaneous administration of 20 mg/kg corticosterone increased CSD frequency exclusively in mutant mice, while corticosterone plasma levels were similarly elevated in mutants and wild types. The effect of corticosterone on CSD frequency was normalised by pre-administration of the glucocorticoid receptor (GR) antagonist mifepristone. These findings suggest that corticosteroid-induced GR activation can enhance susceptibility to CSD in genetically susceptible individuals, and may predispose to attacks of migraine. Although corticosterone levels rise also during acute stress, the latter likely triggers a spatiotemporally more complex biological response with multiple positive and negative modulators which may not be adequately modeled by exogenous administration of corticosterone alone. (C) 2014 Elsevier Inc. All rights reserved.

Original languageEnglish
Pages (from-to)214-220
Number of pages7
JournalExperimental Neurology
Volume263
DOIs
Publication statusPublished - Jan-2015
Externally publishedYes

Keywords

  • Migraine
  • Cortical spreading depression
  • Familial hemiplegic migraine
  • Ca(v)2.1 calcium channels
  • Corticosterone
  • Stress
  • Glutamate
  • Neuronal hyperexcitability
  • HIPPOCAMPAL-NEURONS
  • MOUSE HIPPOCAMPUS
  • CURRENT AMPLITUDE
  • A RECEPTOR
  • RAT-BRAIN
  • NEUROSTEROIDS
  • MODULATE
  • CORTICOTROPIN
  • TRANSMISSION
  • INHIBITION

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