Role of histamine H 1 receptor in caffeine induced locomotor sensitization

The present study elucidated the role of histamine H receptor in the caffeine induced locomotor sensitization. Intermittent administration of caffeine (15 mg/kg, i.p.) on alternate days (induction phase) i.e. 1 , 3 , 5 , 7 , 9 , 11 and 13 resulted in the development of locomotor sensitization. In ad...

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Veröffentlicht in:Neuroscience letters 2018-03, Vol.668, p.60
Hauptverfasser: Kumar, Shalu, Verma, Lokesh, Jain, Nishant S
Format: Artikel
Sprache:eng
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Zusammenfassung:The present study elucidated the role of histamine H receptor in the caffeine induced locomotor sensitization. Intermittent administration of caffeine (15 mg/kg, i.p.) on alternate days (induction phase) i.e. 1 , 3 , 5 , 7 , 9 , 11 and 13 resulted in the development of locomotor sensitization. In addition, challenge with sub-stimulant dose of caffeine (10 mg/kg, i.p.) directly on 17 day to induction group animals resulted in expression to locomotor sensitization to caffeine. I.c.v. injection of histaminergic agents concomitantly with caffeine during induction phase i.e. histamine H receptor agonist, FMPH (6.5 μg/mouse) significantly potentiated while H receptor antagonist, cetirizine (0.1 μg/mouse) attenuated the locomotor sensitization induced by caffeine (15 mg/kg, i.p.). In addition, challenge with caffeine (10 mg/kg, i.p.) on the expression day (17 ) to the induction group mice on FMPH + caffeine treatment showed enhanced, while those on cetirizine + caffeine treatment exhibited lesser expression to locomotor sensitization. Therefore, a possible contributory role of the central histaminergic system via H receptor stimulation or up-regulation in the caffeine-induced locomotor sensitizing effect is proposed.
ISSN:1872-7972
DOI:10.1016/j.neulet.2018.01.002