Article (Scientific journals)
Effects of the H-3-receptor inverse agonist thioperamide on the psychornotor effects induced by acutely and repeatedly given cocaine in C57BL/6J mice
Brabant, Christian; Quertemont, Etienne; Tirelli, Ezio
2006In Pharmacology, Biochemistry and Behavior, 83 (4), p. 561-569
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Keywords :
Cocaine; C57BL/6J mice; H-3 receptors; Gnawing; Locomotion; Psychomotor sensitization; Stereotypy; Thioperamide
Abstract :
[en] Previous studies have shown that histamine H(3) blockers potentiate the psychomotor and rewarding effects of cocaine. The present study examined the influence of thioperamide, an inverse H(3) receptor agonist, on the development of psychomotor sensitization and stereotyped activity induced by acute or intermittent cocaine in C57BL/6J mice. In the first experiment, mice were injected i.p. with saline, 10 or 20mg/kg thioperamide and saline or 8mg/kg cocaine, 10min apart, before being tested for their locomotor activity (providing data on the acute effects of thioperamide on cocaine-induced activity). Subsequently, mice were treated in the same manner every other day over six additional sessions. Sensitization was assessed by the responsiveness to a cocaine challenge (8mg/kg, i.p.) given 2 and 14days following the intermittent treatment. In experiments 2 and 3, we tested the effects of thioperamide (10 or 20mg/kg, i.p.) on gnawing and sniffing induced or affected by relatively high doses of cocaine (24 or 32mg/kg, s.c.), the drugs being given 10min apart. In the first experiment, both doses of thioperamide amplified cocaine-induced psychomotor hyperactivity almost on all experimental sessions. However, the histamine inverse agonist did not affect the induction of a psychomotor sensitization. All cocaine-treated mice showed similar levels of sensitized activity 2 and 14days after the intermittent treatments, whether they received thioperamide or not. The second and the third experiments showed that thioperamide did not affect gnawing and sniffing induced by cocaine. Taken together, these results indicate that H(3) receptors clearly contribute to the neurobiological mechanisms of the locomotor component of cocaine-induced psychomotor activation, but less likely to those underlying the development of cocaine behavioral sensitization or the expression of cocaine-induced oro-facial stereotypies.
Research center :
Centre de Neurosciences Cognitives et Comportementales - ULiège
Disciplines :
Neurosciences & behavior
Pharmacy, pharmacology & toxicology
Psychiatry
Author, co-author :
Brabant, Christian ;  Université de Liège - ULiège > Département des sciences biomédicales et précliniques > Biochimie et physiologie humaine et pathologique
Quertemont, Etienne  ;  Université de Liège - ULiège > Département des sciences cognitives > Psychologie quantitative
Tirelli, Ezio ;  Université de Liège - ULiège > Département des sciences cognitives > Neuroscience comportementale et psychopharmacologie expér.
Language :
English
Title :
Effects of the H-3-receptor inverse agonist thioperamide on the psychornotor effects induced by acutely and repeatedly given cocaine in C57BL/6J mice
Publication date :
2006
Journal title :
Pharmacology, Biochemistry and Behavior
ISSN :
0091-3057
Publisher :
Pergamon-Elsevier Science, Oxford, United Kingdom
Volume :
83
Issue :
4
Pages :
561-569
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
FRFC - Fonds de la Recherche Fondamentale Collective [BE]
Available on ORBi :
since 28 January 2009

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