The effect of CA1 dopaminergic system on amnesia induced by harmane in mice

  • Mohammad Nasehi
  • Sedigheh Hasanvand
  • Fatemeh Khakpai
  • Mohammad-Reza Zarrindast
Original Article


In the present study, the effects of bilateral injections of dopaminergic drugs into the hippocampal CA1 regions (intra-CA1) on harmane-induced amnesia were examined in mice. We used a single-trial step-down inhibitory avoidance task for the assessment of memory acquisition in adult male mice. Our data indicated that pre-training intra-peritoneal (i.p.) administration of harmane (12 mg/kg) impaired memory acquisition. Moreover, intra-CA1 administration of dopamine D1 receptor agonist, SKF38393 (0.25 µg/mouse), dopamine D1 receptor antagonist, SCH23390 (0.25 µg/mouse), dopamine D2 receptor agonist, quinpirole (0.125 and 0.25 µg/mouse) and dopamine D2 receptor antagonist, sulpiride (0.2 and 0.4 µg/mouse) decreased the learning of a single-trial inhibitory avoidance task. Furthermore, pre-training intra-CA1 injection of sub-threshold doses of SKF38393 (0.0625 µg/mouse) or sulpiride (0.1 µg/mouse) increased pre-training harmane (4 and 8 mg/kg, i.p.)-induced amnesia. On the other hand, pre-training intra-CA1 injection of a sub-threshold dose of SCH23390 (0.0625 µg/mouse) reversed amnesia induced by an effective dose of harmane (12 mg/kg; i.p.). In addition, Pre-training intra-CA1 injection of quinpirole (0.0625 µg/mouse) had no effect on memory impairment induced by harmane. These findings indicate the involvement of CA1 dopaminergic system on harmane-induced impairment of memory acquisition.


Memory Dopaminergic system Harmane Inhibitory avoidance Mice 



The authors thank the Iran National Science Foundation (INSF) for providing the financial support for the project.

Compliance with ethical standards

Conflict of interest

There is no conflict of interest in this manuscript.

Ethical approval

All procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards.

Informed consent

For this type of study formal consent is not required.


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Copyright information

© Belgian Neurological Society 2018
corrected publication June 2018

Authors and Affiliations

  • Mohammad Nasehi
    • 1
  • Sedigheh Hasanvand
    • 2
  • Fatemeh Khakpai
    • 1
  • Mohammad-Reza Zarrindast
    • 3
    • 4
    • 5
  1. 1.Cognitive and Neuroscience Research Center (CNRC), Tehran Medical Sciences BranchIslamic Azad UniversityTehranIran
  2. 2.Department of Biology, Faculty of Basic Sciences, Northern branchIslamic Azad UniversityTehranIran
  3. 3.Department of Pharmacology, School of MedicineTehran University of Medical SciencesTehranIran
  4. 4.Iranian National Center for Addiction StudiesTehran University of Medical SciencesTehranIran
  5. 5.Endocrinology and Metabolism Research Center, Endocrinology and Metabolism Clinical Sciences InstituteTehran University of Medical SciencesTehranIran

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