Article (Scientific journals)
Cortical spreading depression decreases Fos expression in rat periaqueductal gray matter.
Borysovych Bogdanov, V.; Bogdanova, O. V.; LOMBARD, Arnaud et al.
2015In Neuroscience Letters, 585, p. 138-143
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Keywords :
Cortical spreading depression; Edinger–Westphal nucleus; Fos expression; Migraine; Periaqueductal gray matter
Abstract :
[en] The migraine headache involves activation and central sensitization of the trigeminovascular pain path- way. The migraine aura is likely due to cortical spreading depression (CSD), a propagating wave of brief neuronal depolarization followed by prolonged inhibition. The precise link between CSD and headache remains controversial. Our objectives were to study the effect of CSD on neuronal activation in the peri- aqueductal grey matter (PAG), an area known to control pain and autonomic functions, and to be involved in migraine pathogenesis. Fos-immunoreactive nuclei were counted in rostral PAG and Edinger–Westphal nuclei (PAG–EWn bregma −6.5 mm), and caudal PAG (bregma −8 mm) of 17 adult male Sprague–Dawley rats after KCl-induced CSD under chloral hydrate anesthesia. Being part of a pharmacological study, six animals had received, for the preceding 4 weeks daily, intraperitoneal injections of lamotrigine (15 mg/kg), six others had been treated with saline, while five sham-operated animals served as controls. We found that the number of Fos-immunoreactive nuclei in the PAG decreased after CSD provocation. There was no difference between lamotrigine- and saline-treated animals. The number of CSDs correlated negatively with Fos-immunoreactive counts. CSD-linked inhibition of neuronal activity in the PAG might play a role in central sensitization during migraine attacks and contribute to a better understanding of the link between the aura and the headache.
Research center :
Giga-Neurosciences - ULiège
Disciplines :
Neurology
Author, co-author :
Borysovych Bogdanov, V.;  Giga-Neurosciences, Headache Research Unit, University of Liege, Liege, Belgium, Taras Shevchenko National University of Kyiv, Volodymyrska Str. 64, Kyiv, Ukraine, INRA, Nutrition et Neurobiologie Intégrée and University Bordeaux, Nutrition et Neurobiologie Intégrée, UMR 1286, 146 Rue Léo-Saignat, Bordeaux Cedex, France
Bogdanova, O. V.;  Taras Shevchenko National University of Kyiv, Volodymyrska Str. 64, Kyiv, Ukraine
LOMBARD, Arnaud  ;  Centre Hospitalier Universitaire de Liège - CHU > Neurologie Sart Tilman
Chauvel, V.;  Giga-Neurosciences, Headache Research Unit, University of Liege, Liege, Belgium
Multon, Sylvie ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Histologie
Kot, L. I.;  Taras Shevchenko National University of Kyiv, Volodymyrska Str. 64, Kyiv, Ukraine
Makarchuk, MY
Schoenen, Jean  ;  Université de Liège > Département des sciences biomédicales et précliniques > Département des sciences biomédicales et précliniques
Language :
English
Title :
Cortical spreading depression decreases Fos expression in rat periaqueductal gray matter.
Publication date :
2015
Journal title :
Neuroscience Letters
ISSN :
0304-3940
eISSN :
1872-7972
Publisher :
Elsevier, Limerick, Ireland
Volume :
585
Pages :
138-143
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
Fonds de la Recherche Scientifique (Communauté française de Belgique) - F.R.S.-FNRS, Fond Léon Fredericq
Available on ORBi :
since 04 June 2015

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