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The Role of Nitric Oxide–Cgmp Pathway in Selegiline Antidepressant-Like Effect in the Mice Forced Swim Test Publisher Pubmed



Ostadhadi S1, 2, 4 ; Shakiba S1, 2, 4 ; Norouzijavidan A1 ; Nikoui V3 ; Zolfaghari S5 ; Chamanara M2 ; Dehpour AR1, 2, 4
Authors
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Authors Affiliations
  1. 1. Brain and Spinal Cord Injury Research Center, Neuroscience Institute, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Department of Pharmacology, School of Medicine, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Razi Drug Research Center, Iran University of Medical Sciences, Tehran, Iran
  4. 4. Experimental Medicine Research Center, Tehran University of Medical Sciences, Tehran, Iran
  5. 5. Department of Tissue Engineering and Applied Cell Sciences, School of Advanced Technologies in Medicine, Iran University of Medical Sciences, Tehran, Iran

Source: Pharmacological Reports Published:2018


Abstract

Background: Considering the pivotal role of nitric oxide (NO) pathway in depressive disorders, the aim of the present study was to investigate the antidepressant-like effect of selegiline in mice forced swimming test (FST), and possible involvement of NO-cyclic guanosine monophosphate (cGMP) pathway in this action. Methods: After assessment of locomotor activity in open-field test, mice were forced to swim individually and the immobility time of the last 4 min was evaluated. All drugs were given intraperitoneally (ip). Results: Selegiline (10 mg/kg) decreased the immobility time in the FST similar to fluoxetine (20 mg/kg). Pretreatment with L-arginine (NO precursor, 750 mg/kg) or sildenafil (a phosphodiesterase 5 inhibitor, 5 mg/kg) significantly reversed the selegiline anti-immobility effect. Sub-effective dose of selegiline (1 mg/kg) showed a synergistic antidepressant effect with NG-nitro-L-arginine methyl ester (L-NAME, inhibitor of NO synthase, 10 mg/kg) or 7-nitroindazole (specific neuronal NO synthase inhibitor, 30 mg/kg), but not with aminoguanidine (specific inducible NO synthase inhibitor, 50 mg/kg). Pretreatment of mice with methylene blue (an inhibitor of NO synthase and soluble guanylyl cyclase, 10 mg/kg) significantly produced a synergistic response with the sub-effective dose of selegiline. Neither of the drugs changed the locomotor activity. Also, hippocampal and prefrontal cortex (PFC) nitrite content was significantly lower in selegiline-injected mice compared to saline-administrated mice. Also, co-injection of 7-nitroindazole with selegiline produced a significant reduction in hippocampal or PFC nitrite contents. Conclusions: It is concluded that selegiline possesses antidepressant-like effect in mice FST through inhibition of L-arginine-NO-cyclic guanosine monophosphate pathway. © 2018 Institute of Pharmacology, Polish Academy of Sciences
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