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  • Title: [The role of 5-HT3, 5-HT(1A) receptors and its coaction in the regulation behavior in mice].
    Author: Kondaurova EM, Naumenko VS, Bazovkina DB.
    Journal: Zh Vyssh Nerv Deiat Im I P Pavlova; 2014; 64(5):510-20. PubMed ID: 25710072.
    Abstract:
    Here we investigated whether the 5-HT3 receptor and the 5-HT3/5-HT(1A) receptors coaction play essential role in the regulation of locomotion, depressive-like and social behavior. It was found that central administration of selective agonist of 5-HT3 receptor m-CPBG (2.5, 5.0, 10.0 nmol) produced significant decrease of horizontal and vertical locomotor activity in the open field (OF) test. Selective antagonist of 5-HT(1A) receptor WAY-100635 (2.0 mg/kg (3.7 μmol/kg), i.p.) attenuated the effect of m-CPBG on behavior in the OF test. Selective 5-HT(1A) receptor agonist 8-OH-DPAT (0.25, 0.5, 1.0 mg/kg (0.76, 1.5 and 3.0 μmol/kg correspondingly), i.p.) significantly decreased horizontal and vertical locomotor activity in the OF test as well. The activation of 5-HT3 receptors failed to affect immobility time in the tail suspension test, whereas the activation 5-HT(1A) receptors significantly decreased the immobility time. Administration of m-CPBG also did not produced considerable effect on social behavior. At the same time, 8-OH-DPAT significantly decreased time and number of social contacts. Thus it was shown for the first time that 5-HT3 receptor-induced behavioral response observed in the OF realized mainly via 5-MHT(1A) receptor. Obtained results provide new evidence on the role of 5-HT3 receptors and 5-HT3/5-HT(1A) receptors coaction in the regulation of locomotor activity but not in the depressive-like and social behavior.
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