Article (Scientific journals)
Nitroglycerin sensitises in healthy subjects CNS structures involved in migraine pathophysiology: evidence from a study of nociceptive blink reflexes and visual evoked potentials.
Di Clemente, Laura; Coppola, Gianluca; Magis, Delphine et al.
2009In Pain, 144 (1-2), p. 156-61
Peer Reviewed verified by ORBi
 

Files


Full Text
Nitroglycerin sensitises Di Clemente et al 09.pdf
Publisher postprint (342.72 kB)
Request a copy

All documents in ORBi are protected by a user license.

Send to



Details



Keywords :
Adult; Analysis of Variance; Blinking/drug effects; Dose-Response Relationship, Drug; Drug Administration Routes; Electric Stimulation/adverse effects; Electroencephalography/methods; Evoked Potentials, Visual/drug effects; Female; Habituation, Psychophysiologic/drug effects; Humans; Male; Migraine Disorders/chemically induced/physiopathology; Nitric Oxide Donors/adverse effects/pharmacology; Nitroglycerin/adverse effects/pharmacology; Pain/etiology/physiopathology; Pain Threshold/drug effects; Young Adult
Abstract :
[en] Nitroglycerin (NTG), a NO donor, induces an attack in migraine patients approximately 4-6 h after administration. The causative mechanisms are not known, but the long delay leaves room for a central effect, such as a change in neuronal excitability and synaptic transmission of various CNS areas involved in pain and behaviour including trigeminal nucleus caudalis and monoaminergic brain stem nuclei. To explore the central action of NTG, we have studied its effects on amplitude and habituation of the nociceptive blink reflex (nBR) and the visual evoked potential (VEP) before, 1 h and 4 h after administration of NTG (1.2 mg sublingual) or placebo (vehicle sublingual) in two groups of 10 healthy volunteers. We found a significant decrease in nBR pain and reflex thresholds both 1 and 4 h post-NTG. At the 4 h time point R2 latency was shorter (p=0.04) and R2 response area increased (p<0.01) after NTG but not after placebo. Habituation tended to become more pronounced after both NTG and placebo administration. There was a significant amplitude increase in the 5th VEP block (p=0.03) at 1h after NTG and in the 1st block (p=0.04) at 4 h. VEP habituation was replaced by potentiation at both delays after NTG; the change in habituation slope was significant at 1h (p=0.02). There were no significant VEP changes in subjects who received sublingual placebo. In conclusion, we found that in healthy subjects sublingual NTG, but not its vehicle, induces changes in a trigeminal nociceptive reflex and an evoked cortical response which are comparable to those found immediately before and during an attack of migraine. These changes could be relevant for the attack-triggering effect of NTG in migraineurs.
Disciplines :
Neurology
Author, co-author :
Di Clemente, Laura
Coppola, Gianluca
Magis, Delphine ;  Centre Hospitalier Universitaire de Liège - CHU > Neurologie Sart Tilman
Gérardy, Pierre-Yves ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Neuro-anatomie
Fumal, Arnaud ;  Centre Hospitalier Universitaire de Liège - CHU > Neurologie CHR
De Pasqua, Victor ;  Centre Hospitalier Universitaire de Liège - CHU > Neurologie CHR
Di Piero, Vittorio
Schoenen, Jean  ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Neuro-anatomie
Language :
English
Title :
Nitroglycerin sensitises in healthy subjects CNS structures involved in migraine pathophysiology: evidence from a study of nociceptive blink reflexes and visual evoked potentials.
Publication date :
2009
Journal title :
Pain
ISSN :
0304-3959
eISSN :
1872-6623
Publisher :
Elsevier Science, Amsterdam, Netherlands
Volume :
144
Issue :
1-2
Pages :
156-61
Peer reviewed :
Peer Reviewed verified by ORBi
Available on ORBi :
since 23 September 2009

Statistics


Number of views
107 (1 by ULiège)
Number of downloads
1 (1 by ULiège)

Scopus citations®
 
37
Scopus citations®
without self-citations
30
OpenCitations
 
35

Bibliography


Similar publications



Contact ORBi