Abstract
The aim of the present study was to investigate whether and by which mechanism; histamine can induce state-dependent retrieval of passive avoidance task. The pre-training or pre-test intracerebroventricular (i.c.v.) injection of histamine (20µg/mouse) impaired retrieval, when it was tested 24 h later. In the animals, which retrieval was impaired due to histamine pre-training administration, pre-test administration of histamine, with the same dose, restored retrieval. The H1 blocker, pyrilamine (20 µg/mouse, i.c.v.), but not the H2 blocker; ranitidine prevented the restoration of retrieval by pre-test histamine. A pre-test administration of histamine H3 receptor antagonist, clobenprobit, also reversed hitamine-induced impairment of memory retention. In conclusion, histamine can induce state-dependent retrieval through the H1 receptor H1 mechanism.
Keywords
Mouse State-dependent retrieval Memory Histamine receptor antagonist Histamine
Copyright
© 2022, Author(s). This open-access article is available under the Creative Commons Attribution 4.0 (CC BY 4.0) International License (https://creativecommons.org/licenses/by/4.0/), which allows for unrestricted use, distribution, and reproduction in any medium, provided that the original work is properly cited.