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László K, Péczely L, Géczi F, Kovács A, Zagoracz O, Ollmann T, Kertes E, Kállai V, László B, Berta B, Karádi Z, Lénárd L. The role of D2 dopamine receptors in oxytocin induced place preference and anxiolytic effect. Horm Behav 2020; 124:104777. [PMID: 32439347 DOI: 10.1016/j.yhbeh.2020.104777] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 04/24/2020] [Accepted: 05/15/2020] [Indexed: 12/01/2022]
Abstract
Neuropeptide oxytocin (OT) is involved in the regulation of social and non-social behaviour. The central nucleus of amygdala (CeA), part of the limbic system, plays an important role in learning, memory, anxiety and reinforcing mechanisms. CeA has been shown to be rich in OT receptors in rodents. Our previous findings indicated that OT in the rat CeA has a dose dependent rewarding and anxiolytic effect. The aim of our present study was to examine in the CeA the possible interaction of OT and D2 dopamine (DA) receptor antagonist Sulpiride on reinforcement in place preference test and on anxiety in elevated plus maze test. Wistar rats were microinjected bilaterally with 10 ng OT. In different group of animals 4 μg D2 DA receptor antagonist was applied. Other animals received D2 DA receptor antagonist 15 min before 10 ng OT treatment or vehicle solution into the CeA. Rats receiving 10 ng OT spent significantly longer time in the treatment quadrant during the test session in conditioned place preference test. Prior treatment with D2 DA receptor antagonist blocked the rewarding effects of OT. Antagonist in itself did not influence the time rats spent in the treatment quadrant. In elevated plus maze test, rats receiving 10 ng OT spent significantly longer time on the open arms. Prior treatment with D2 DA receptor antagonist blocked the effects of OT. Our results show that DA system plays a role in positive reinforcing and anxiolytic effects of OT because D2 DA receptor antagonist can block these actions.
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MESH Headings
- Amygdala/drug effects
- Amygdala/metabolism
- Animals
- Anti-Anxiety Agents/pharmacology
- Anxiety/drug therapy
- Behavior, Animal/drug effects
- Conditioning, Classical/drug effects
- Dopamine D2 Receptor Antagonists/pharmacology
- Fear/drug effects
- Freezing Reaction, Cataleptic/drug effects
- Male
- Maze Learning/drug effects
- Oxytocin/pharmacology
- Rats
- Rats, Wistar
- Receptors, Dopamine D1/metabolism
- Receptors, Dopamine D2/metabolism
- Receptors, Dopamine D2/physiology
- Receptors, Oxytocin/metabolism
- Receptors, Oxytocin/physiology
- Reinforcement, Psychology
- Reward
- Spatial Behavior/drug effects
- Sulpiride/pharmacology
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Affiliation(s)
- K László
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Neuroscience Center, University of Pécs, Pécs, Hungary.
| | - L Péczely
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Neuroscience Center, University of Pécs, Pécs, Hungary
| | - F Géczi
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Neuroscience Center, University of Pécs, Pécs, Hungary
| | - A Kovács
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Neuroscience Center, University of Pécs, Pécs, Hungary
| | - O Zagoracz
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Neuroscience Center, University of Pécs, Pécs, Hungary
| | - T Ollmann
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Neuroscience Center, University of Pécs, Pécs, Hungary
| | - E Kertes
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Neuroscience Center, University of Pécs, Pécs, Hungary
| | - V Kállai
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Neuroscience Center, University of Pécs, Pécs, Hungary
| | - B László
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Neuroscience Center, University of Pécs, Pécs, Hungary
| | - B Berta
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Neuroscience Center, University of Pécs, Pécs, Hungary
| | - Z Karádi
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Neuroscience Center, University of Pécs, Pécs, Hungary; Molecular Endocrinology and Neurophysiology Research Group, University of Pécs, Szentágothai Center, Pécs, Hungary
| | - L Lénárd
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Neuroscience Center, University of Pécs, Pécs, Hungary; Molecular Endocrinology and Neurophysiology Research Group, University of Pécs, Szentágothai Center, Pécs, Hungary
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Lénárd L, László K, Kertes E, Ollmann T, Péczely L, Kovács A, Kállai V, Zagorácz O, Gálosi R, Karádi Z. Substance P and neurotensin in the limbic system: Their roles in reinforcement and memory consolidation. Neurosci Biobehav Rev 2018; 85:1-20. [DOI: 10.1016/j.neubiorev.2017.09.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2017] [Revised: 08/24/2017] [Accepted: 09/02/2017] [Indexed: 12/18/2022]
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