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  • Title: Testosterone promotes anxiolytic-like behavior in gonadectomized male rats via blockade of the 5-HT1A receptors.
    Author: Fedotova J, Hritcu L.
    Journal: Gen Comp Endocrinol; 2017 Dec 01; 254():14-21. PubMed ID: 28919453.
    Abstract:
    This study was designed to examine an anxiety-like behavior in the adult gonadectomized (GDX) male rats subjected to testosterone propionate (TP) treatment alone or in combination with 8-OH-DPAT, a 5-HT1A receptor agonist, or with NAN-190, 5-HT1A receptor antagonist. Two weeks after gonadectomy, GDX rats were subjected by treatments with the solvent, TP (0.5mg/kg, s.c.), 8-OH-DPAT (0.05mg/kg, s.c.), NAN-190 (0.1mg/kg, i.p.), TP in combination with 8-OH-DPAT or NAN-190 during 14days. Anxiety behavior was assessed in the elevated plus maze (EPM) and the open field test (OFT). 8-OH-DPAT treatment failed to modify the anxiety-like behavior of GDX rats in the EPM as compared to the GDX rats given with oil solvent. NAN-190 injected alone or in combination with TP to GDX rats resulted in a significant anxiolytic-like effect as compared to the GDX given with oil solvent or TP application. Our data indicate that the combination of NAN-190 and TP is more effective than TP alone in GDX rats inducing a more profound anxiolytic-like effect in the EPM. Thus, the results of this study suggest that effects of 5-HT1A receptor agonist/antagonist can modify anxiety level in opposite direction in male rats after gonadectomy.
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