Article (Scientific journals)
Nitroglycerin-induced nNOS increase in rat trigeminal nucleus caudalis is inhibited by systemic administration of lysine acetylsalicylate but not of sumatriptan
Pardutz, A.; Szatmari, E.; Vecsei, L. et al.
2004In Cephalalgia, 24 (6), p. 439-445
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Keywords :
nitroglycerin; nitric oxide synthase; caudal spinal trigeminal nucleus; sumatriptan; lysine acetylsalicylate
Abstract :
[en] Systemic administration of nitroglycerin (NTG), a nitric oxide (NO) donor, in migraineurs triggers after several hours an attack of which the precise mechanisms are unknown. We found previously in rats that nitroglycerin (10 mg/kg s.c.) is able to increase significantly after 4 h the number of neuronal nitric oxide synthase (nNOS)-immunoreactive neurones in the cervical part of trigeminal nucleus caudalis. In the present experiments, we demonstrate that the 5-HT1(B/D) agonist sumatriptan (0.6 mg/kg s.c.) does not alter this phenomenon when given before NTG. By contrast, pretreatment with lysine acetylsalicylate (50 mg/kg i.m.) attenuates the NTG-induced nNOS expression in the superficial laminae of trigeminal nucleus caudalis. These findings suggest that effect of NTG on nNOS at a high dosage may involve the cycloxygenase pathway and that activation of the peripheral 5-HT1(B/D) receptors is not able to modify this effect. These data could help to better understand the role of NO in the pathogenesis of headaches and the action of antimigraine drugs.
Disciplines :
Neurosciences & behavior
Neurology
Author, co-author :
Pardutz, A.
Szatmari, E.
Vecsei, L.
Schoenen, Jean  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Neuro-anatomie
Language :
English
Title :
Nitroglycerin-induced nNOS increase in rat trigeminal nucleus caudalis is inhibited by systemic administration of lysine acetylsalicylate but not of sumatriptan
Publication date :
June 2004
Journal title :
Cephalalgia
ISSN :
0333-1024
eISSN :
1468-2982
Publisher :
Blackwell Science
Volume :
24
Issue :
6
Pages :
439-445
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 28 September 2009

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