Effectiveness of memantine on depression-like behavior, memory deficits and brain mRNA levels of BDNF and TrkB in rats subjected to repeated unpredictable stress

Meysam Amidfar, Yong Ku Kim, Ove Wiborg

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Background: Previous clinical and preclinical studies have indicated that the N-methyl-D-aspartate (NMDA) receptor antagonist, memantine, has neuroprotective properties as well as antidepressant effects. The present study was designed to examine behavioral and molecular effects of memantine administration in rats subjected to the repeated unpredictable stress (RUS) paradigm. Methods: Rats were split into four groups at random including control + saline, control + memantine, stressed + saline and stressed + memantine. After 10 days of exposure to the RUS paradigm, rats were administered memantine (20 mg/kg) intraperitoneally (ip) for 14 days. Depression-like behavior and memory performance were assessed by measuring immobility time in the forced swim test and passive avoidance test, respectively. The mRNA levels of BDNF and TrkB in the prefrontal cortex and hippocampus were measured by real-time quantitative PCR. Results: Our results demonstrated that the RUS paradigm caused depression-like behavior and impairment of memory retrieval in rats. We did not find significant changes in BDNF or TrkB mRNA levels in hippocampus, but mRNA levels of TrkB in the prefrontal cortex showed a significant downregulation. Administration of memantine reversed depression-like behavior and memory impairment and significantly increased BDNF and TrkB mRNA levels in both prefrontal cortex and hippocampus of stress exposed rats. Conclusions: Our study supports the hypothesis that drugs with antagonistic properties on the NMDA receptor, such as memantine, might be efficient in treatment of major depression. Our results also suggest that upregulated mRNA levels of BDNF and TrkB in the brain might be essential for antidepressant-like activity of memantine in stress exposed rats.

Original languageEnglish
Pages (from-to)600-606
Number of pages7
JournalPharmacological Reports
Volume70
Issue number3
DOIs
Publication statusPublished - 2018 Jun

Keywords

  • BDNF
  • Depression
  • Memantine
  • Rat brain
  • TrkB

ASJC Scopus subject areas

  • Pharmacology

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