Effect of the histamine H3-antagonist clobenpropit on spatial memory deficits induced by MK-801 as evaluated by radial maze in Sprague-Dawley rats

Yu Wen Huang, Wei Wei Hu, Zhong Chen, Li San Zhang, Hai Qing Shen, Henk Timmerman, Rob Leurs, Kazuhiko Yanai

Research output: Contribution to journalArticlepeer-review

47 Citations (Scopus)

Abstract

This study was performed to investigate whether or not the histamine H 3-antagonist clobenpropit can ameliorate spatial memory deficits induced by MK-801 (0.3μg per site) as evaluated by an eight-arm radial maze task of rats. A bilateral intrahippocampal (i.h.) injection of clobenpropit (5, 10μg per site, dose-dependent) markedly improved the working and reference memory deficits induced by MK-801. Its ameliorating effect was potentiated by histidine, but completely antagonized by immepip (2.5μg per site), a selective H3-agonist. α-Fluoromethylhistidine (FMH, 25μg per site), a selective histidine decarboxylase inhibitor prevented the ameliorating effect of clobenpropit on the working memory deficits induced by MK-801. In addition, the H1-antagonist pyrilamine, but not the H 2-antagonist cimetidine, also inhibited the procognitive effects of clobenpropit. Both FMH and pyrilamine did not significantly modulate the effect of clobenpropit on reference memory. Therefore, the results of this study suggest that the procognitive effects of clobenpropit in MK-801-induced working memory deficits is mediated by increasing endogenous histamine release. In addition, the ameliorating effect of clobenpropit on reference memory might be due to the increased release of neurotransmitters other than histamine.

Original languageEnglish
Pages (from-to)287-293
Number of pages7
JournalBehavioural Brain Research
Volume151
Issue number1-2
DOIs
Publication statusPublished - 2004 May 5

Keywords

  • Clobenpropit
  • Endogenous histamine
  • Learning
  • MK-801
  • Maze
  • Reference memory
  • Working memory

ASJC Scopus subject areas

  • Behavioral Neuroscience

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