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Vörös D, Kiss O, Taigiszer M, László BR, Ollmann T, Péczely L, Zagorácz O, Kertes E, Kállai V, Berta B, Kovács A, Karádi Z, Lénárd L, László K. The role of intraamygdaloid oxytocin in spatial learning and avoidance learning. Peptides 2024; 175:171169. [PMID: 38340898 DOI: 10.1016/j.peptides.2024.171169] [Citation(s) in RCA: 0] [Impact Index Per Article: 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: 11/08/2023] [Revised: 01/26/2024] [Accepted: 02/06/2024] [Indexed: 02/12/2024]
Abstract
The goal of the present study is to investigate the role of intraamygdaloid oxytocin in learning-related mechanisms. Oxytocin is a neuropeptide which is involved in social bonding, trust, emotional responses and various social behaviors. By conducting passive avoidance and Morris water maze tests on male Wistar rats, the role of intraamygdaloid oxytocin in memory performance and learning was investigated. Oxytocin doses of 10 ng and 100 ng were injected into the central nucleus of the amygdala. Our results showed that 10 ng oxytocin significantly reduced the time required to locate the platform during the Morris water maze test while significantly increasing the latency time in the passive avoidance test. However, the 100 ng oxytocin experiment failed to produce a significant effect in either of the tests. Wistar rats pretreated with 20 ng oxytocin receptor antagonist (L-2540) were administered 10 ng of oxytocin into the central nucleus of the amygdala and were also subjected to the aforementioned tests to highlight the role of oxytocin receptors in spatial- and avoidance learning. Results suggest that oxytocin supports memory processing during both the passive avoidance and the Morris water maze tests. Oxytocin antagonists can however block the effects of oxytocin in both tests. The results substantiate that oxytocin uses oxytocin receptors to enhance memory and learning performance.
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Affiliation(s)
- Dávid Vörös
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Orsolya Kiss
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Márton Taigiszer
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Bettina Réka László
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
| | - Tamás Ollmann
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - László Péczely
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Olga Zagorácz
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Erika Kertes
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Veronika Kállai
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Beáta Berta
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Anita Kovács
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
| | - Zoltán Karádi
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Cellular Bioimpedance Research Group, Szentágothai Research Center, University of Pécs, 7602 Pécs, Hungary; Molecular Endocrinology and Neurophysiology Research Group, Szentágothai Center, University of Pécs, 7602 Pécs, Hungary
| | - László Lénárd
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary; Molecular Endocrinology and Neurophysiology Research Group, Szentágothai Center, University of Pécs, 7602 Pécs, Hungary
| | - Kristóf László
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, P.O. Box 99, 7602 Pécs, Hungary; Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary; Neuroscience Center, University of Pécs, 7602 Pécs, Hungary.
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László K, Vörös D, Correia P, Fazekas CL, Török B, Plangár I, Zelena D. Vasopressin as Possible Treatment Option in Autism Spectrum Disorder. Biomedicines 2023; 11:2603. [PMID: 37892977 PMCID: PMC10603886 DOI: 10.3390/biomedicines11102603] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Revised: 09/13/2023] [Accepted: 09/21/2023] [Indexed: 10/29/2023] Open
Abstract
Autism spectrum disorder (ASD) is rather common, presenting with prevalent early problems in social communication and accompanied by repetitive behavior. As vasopressin was implicated not only in salt-water homeostasis and stress-axis regulation, but also in social behavior, its role in the development of ASD might be suggested. In this review, we summarized a wide range of problems associated with ASD to which vasopressin might contribute, from social skills to communication, motor function problems, autonomous nervous system alterations as well as sleep disturbances, and altered sensory information processing. Beside functional connections between vasopressin and ASD, we draw attention to the anatomical background, highlighting several brain areas, including the paraventricular nucleus of the hypothalamus, medial preoptic area, lateral septum, bed nucleus of stria terminalis, amygdala, hippocampus, olfactory bulb and even the cerebellum, either producing vasopressin or containing vasopressinergic receptors (presumably V1a). Sex differences in the vasopressinergic system might underline the male prevalence of ASD. Moreover, vasopressin might contribute to the effectiveness of available off-label therapies as well as serve as a possible target for intervention. In this sense, vasopressin, but paradoxically also V1a receptor antagonist, were found to be effective in some clinical trials. We concluded that although vasopressin might be an effective candidate for ASD treatment, we might assume that only a subgroup (e.g., with stress-axis disturbances), a certain sex (most probably males) and a certain brain area (targeting by means of virus vectors) would benefit from this therapy.
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Affiliation(s)
- Kristóf László
- Institute of Physiology, Medical School, University of Pécs, 7624 Pecs, Hungary; (K.L.); (D.V.); (P.C.); (C.L.F.); (B.T.); (I.P.)
- Center of Neuroscience, University of Pécs, 7624 Pecs, Hungary
- Szentágothai Research Center, University of Pécs, 7624 Pecs, Hungary
| | - Dávid Vörös
- Institute of Physiology, Medical School, University of Pécs, 7624 Pecs, Hungary; (K.L.); (D.V.); (P.C.); (C.L.F.); (B.T.); (I.P.)
- Center of Neuroscience, University of Pécs, 7624 Pecs, Hungary
- Szentágothai Research Center, University of Pécs, 7624 Pecs, Hungary
| | - Pedro Correia
- Institute of Physiology, Medical School, University of Pécs, 7624 Pecs, Hungary; (K.L.); (D.V.); (P.C.); (C.L.F.); (B.T.); (I.P.)
- Center of Neuroscience, University of Pécs, 7624 Pecs, Hungary
- Szentágothai Research Center, University of Pécs, 7624 Pecs, Hungary
- Hungarian Research Network, Institute of Experimental Medicine, 1083 Budapest, Hungary
| | - Csilla Lea Fazekas
- Institute of Physiology, Medical School, University of Pécs, 7624 Pecs, Hungary; (K.L.); (D.V.); (P.C.); (C.L.F.); (B.T.); (I.P.)
- Center of Neuroscience, University of Pécs, 7624 Pecs, Hungary
- Szentágothai Research Center, University of Pécs, 7624 Pecs, Hungary
- Hungarian Research Network, Institute of Experimental Medicine, 1083 Budapest, Hungary
| | - Bibiána Török
- Institute of Physiology, Medical School, University of Pécs, 7624 Pecs, Hungary; (K.L.); (D.V.); (P.C.); (C.L.F.); (B.T.); (I.P.)
- Center of Neuroscience, University of Pécs, 7624 Pecs, Hungary
- Szentágothai Research Center, University of Pécs, 7624 Pecs, Hungary
- Hungarian Research Network, Institute of Experimental Medicine, 1083 Budapest, Hungary
| | - Imola Plangár
- Institute of Physiology, Medical School, University of Pécs, 7624 Pecs, Hungary; (K.L.); (D.V.); (P.C.); (C.L.F.); (B.T.); (I.P.)
- Center of Neuroscience, University of Pécs, 7624 Pecs, Hungary
- Szentágothai Research Center, University of Pécs, 7624 Pecs, Hungary
| | - Dóra Zelena
- Institute of Physiology, Medical School, University of Pécs, 7624 Pecs, Hungary; (K.L.); (D.V.); (P.C.); (C.L.F.); (B.T.); (I.P.)
- Center of Neuroscience, University of Pécs, 7624 Pecs, Hungary
- Szentágothai Research Center, University of Pécs, 7624 Pecs, Hungary
- Hungarian Research Network, Institute of Experimental Medicine, 1083 Budapest, Hungary
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Vörös D, Kiss O, Ollmann T, Mintál K, Péczely L, Zagoracz O, Kertes E, Kállai V, László BR, Berta B, Toth A, Lénárd L, László K. Intraamygdaloid Oxytocin Increases Time Spent on Social Interaction in Valproate-Induced Autism Animal Model. Biomedicines 2023; 11:1802. [PMID: 37509444 PMCID: PMC10376246 DOI: 10.3390/biomedicines11071802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 06/16/2023] [Accepted: 06/17/2023] [Indexed: 07/30/2023] Open
Abstract
Autism spectrum disorder (ASD) is a pervasive neurodevelopmental disorder that affects about 1.5% of children worldwide. One of the core symptoms is impaired social interaction. Since proper treatment has not been found yet, an investigation of the exact pathophysiology of autism is essential. The valproate (VPA)-induced rat model can be an appropriate way to study autism. Oxytocin (OT) may amend some symptoms of ASD since it plays a key role in developing social relationships. In the present study, we investigated the effect of the intraamygdaloid OT on sham and intrauterine VPA-treated rats' social interaction using Crawley's social interaction test. Bilateral guide cannulae were implanted above the central nucleus of the amygdala (CeA), and intraamygdaloid microinjections were carried out before the test. Our results show that male Wistar rats prenatally exposed to VPA spent significantly less time on social interaction. Bilateral OT microinjection increased the time spent in the social zone; it also reached the level of sham-control animals. OT receptor antagonist blocked this effect of the OT but in itself did not significantly influence the behavior of the rats. Based on our results, we can establish that intraamygdaloid OT has significantly increased time spent on social interaction in the VPA-induced autism model, and its effect is receptor-specific.
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Affiliation(s)
- Dávid Vörös
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, 7602 Pécs, Hungary
- Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Orsolya Kiss
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, 7602 Pécs, Hungary
- Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Tamás Ollmann
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, 7602 Pécs, Hungary
- Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
- Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Kitti Mintál
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, 7602 Pécs, Hungary
- Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
- Cellular Bioimpedance Research Group, Szentágothai Research Center, University of Pécs, 7602 Pécs, Hungary
| | - László Péczely
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
- Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Olga Zagoracz
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, 7602 Pécs, Hungary
- Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
- Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Erika Kertes
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, 7602 Pécs, Hungary
- Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
- Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Veronika Kállai
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, 7602 Pécs, Hungary
- Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
- Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Bettina Réka László
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
| | - Beáta Berta
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, 7602 Pécs, Hungary
- Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
- Learning in Biological and Artificial Systems Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
| | - Attila Toth
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, 7602 Pécs, Hungary
- Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
- Cellular Bioimpedance Research Group, Szentágothai Research Center, University of Pécs, 7602 Pécs, Hungary
| | - László Lénárd
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, 7602 Pécs, Hungary
- Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
- Molecular Endocrinology and Neurophysiology Research Group, Szentágothai Center, University of Pécs, 7602 Pécs, Hungary
| | - Kristóf László
- Medical School, Institute of Physiology, University of Pécs, Szigeti Str. 12, 7602 Pécs, Hungary
- Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Medical School, Institute of Physiology, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
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László BR, Kertes E, Ollmann T, Péczely L, Kovács A, Karádi Z, Lénárd L, László K. The Role of Intra-Amygdaloid Neurotensin and Dopamine Interaction in Spatial Learning and Memory. Biomedicines 2022; 10:biomedicines10123138. [PMID: 36551894 PMCID: PMC9775557 DOI: 10.3390/biomedicines10123138] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 11/25/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022] Open
Abstract
Neurotransmitter and neuromodulator neurotensin (NT) has been proved to facilitate spatial and passive avoidance learning after microinjected into the rat central nucleus of amygdala (CeA). These previous studies of our laboratory also revealed that neurotensin-1 receptor (NTS1) is involved in the mentioned actions of NT. Extensive literature confirms the interaction between neurotensinergic and dopaminergic systems, and our research group also suppose that the mesolimbic dopaminergic system (MLDS) is involved in the spatial learning and memory-facilitating effect of NT in the CeA. In the present work, NT and dopamine (DA) interaction has been examined in the Morris water maze and passive avoidance tests. Rats received 100 ng NT, 5 µg dopamine D2 receptor antagonist sulpiride in itself, sulpiride as a pretreatment before NT or vehicle solution into the CeA. NT microinjection significantly decreased target-finding latency in the Morris water maze test and significantly increased entrance latency in the passive avoidance test, as was expected based on our previous findings. The DA D2 receptor antagonist pretreatment was able to inhibit both effects of NT. The results confirm the facilitatory effect of NT on spatial learning and memory and let us conclude that these actions can be exerted via the DA D2 receptors.
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Affiliation(s)
- Bettina Réka László
- Institute of Physiology, Medical School, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
| | - Erika Kertes
- Institute of Physiology, Medical School, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
- Learning in Biological and Artificial Systems Research Group, Institute of Physiology, Medical School, University of Pécs, 7602 Pécs, Hungary
- Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Institute of Physiology, Medical School, University of Pécs, 7602 Pécs, Hungary
| | - Tamás Ollmann
- Institute of Physiology, Medical School, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
- Learning in Biological and Artificial Systems Research Group, Institute of Physiology, Medical School, University of Pécs, 7602 Pécs, Hungary
- Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Institute of Physiology, Medical School, University of Pécs, 7602 Pécs, Hungary
| | - László Péczely
- Institute of Physiology, Medical School, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
- Learning in Biological and Artificial Systems Research Group, Institute of Physiology, Medical School, University of Pécs, 7602 Pécs, Hungary
| | - Anita Kovács
- Institute of Physiology, Medical School, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
- Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Institute of Physiology, Medical School, University of Pécs, 7602 Pécs, Hungary
| | - Zoltán Karádi
- Institute of Physiology, Medical School, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
- Szentágothai Research Center, Cellular Bioimpedance Research Group, 7624 Pécs, Hungary
- Szentágothai Center, Molecular Endocrinology and Neurophysiology Research Group, University of Pécs, 7624 Pécs, Hungary
| | - László Lénárd
- Institute of Physiology, Medical School, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
- Szentágothai Research Center, Cellular Bioimpedance Research Group, 7624 Pécs, Hungary
- Szentágothai Center, Molecular Endocrinology and Neurophysiology Research Group, University of Pécs, 7624 Pécs, Hungary
| | - Kristóf László
- Institute of Physiology, Medical School, University of Pécs, 7602 Pécs, Hungary
- Neuroscience Center, University of Pécs, 7602 Pécs, Hungary
- Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Institute of Physiology, Medical School, University of Pécs, 7602 Pécs, Hungary
- Correspondence:
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Dusa D, Ollmann T, Kállai V, Lénárd L, Kertes E, Berta B, Szabó Á, László K, Gálosi R, Zagoracz O, Karádi Z, Péczely L. The antipsychotic drug sulpiride in the ventral pallidum paradoxically impairs learning and induces place preference. Sci Rep 2022; 12:19247. [PMID: 36357539 PMCID: PMC9649625 DOI: 10.1038/s41598-022-23450-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Accepted: 10/31/2022] [Indexed: 11/12/2022] Open
Abstract
Sulpiride, as a D2-like dopamine (DA) receptor (D2R) antagonist, is an important antipsychotic drug in the treatment of schizophrenia. Recently, we have shown that the activation of D2Rs in the ventral pallidum (VP) modulates the activity of the ventral tegmental area (VTA) DAergic neurons. According to our hypothesis, intra-VP sulpiride can influence the motivational and learning processes, pervasively modifying the behavior of examined animals. In the present study, sulpiride was microinjected into the VP of male Wistar rats in three different doses. Morris water maze (MWM) test was applied to investigate the effects of sulpiride on spatial learning, while conditioned place preference (CPP) test was used to examine the potential rewarding effect of the drug. In order to show, whether the animals can associate the rewarding effect with an area which can be recognized only on its spatial location, we introduced a modified version of the CPP paradigm, the spatial CPP test. Our results show that the intra-VP sulpiride dose-dependently impairs learning processes. However, the largest dose of sulpiride induces place preference. Results of the spatial CPP paradigm demonstrate that the animals cannot associate the rewarding effect of the drug with the conditioning area based on its spatial location. In the CPP paradigm, locomotor activity decrease could be observed in the sulpiride-treated rats, likely because of a faster habituation with the conditioning environment. In summary, we can conclude that intra-VP sulpiride has a dual effect: it diminishes the hippocampus-dependent spatial learning processes, in addition, it has a dose-dependent rewarding effect.
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Affiliation(s)
- Daniella Dusa
- grid.9679.10000 0001 0663 9479Learning in Biological and Artificial Systems Research Group, Institute of Physiology, Medical School, University of Pécs, Pécs, Hungary ,grid.9679.10000 0001 0663 9479Institute of Physiology, Medical School, University of Pécs, Szigeti Str. 12, P.O. Box: 99, Pécs, 7602 Hungary ,grid.9679.10000 0001 0663 9479Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Tamás Ollmann
- grid.9679.10000 0001 0663 9479Learning in Biological and Artificial Systems Research Group, Institute of Physiology, Medical School, University of Pécs, Pécs, Hungary ,grid.9679.10000 0001 0663 9479Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Institute of Physiology, Medical School, University of Pécs, Pécs, Hungary ,grid.9679.10000 0001 0663 9479Institute of Physiology, Medical School, University of Pécs, Szigeti Str. 12, P.O. Box: 99, Pécs, 7602 Hungary ,grid.9679.10000 0001 0663 9479Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Veronika Kállai
- grid.9679.10000 0001 0663 9479Learning in Biological and Artificial Systems Research Group, Institute of Physiology, Medical School, University of Pécs, Pécs, Hungary ,grid.9679.10000 0001 0663 9479Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Institute of Physiology, Medical School, University of Pécs, Pécs, Hungary ,grid.9679.10000 0001 0663 9479Institute of Physiology, Medical School, University of Pécs, Szigeti Str. 12, P.O. Box: 99, Pécs, 7602 Hungary ,grid.9679.10000 0001 0663 9479Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - László Lénárd
- grid.9679.10000 0001 0663 9479Institute of Physiology, Medical School, University of Pécs, Szigeti Str. 12, P.O. Box: 99, Pécs, 7602 Hungary ,grid.9679.10000 0001 0663 9479Molecular Neuroendocrinology and Neurophysiology Research Group, Szentágothai Research Centre, University of Pécs, Pécs, Hungary ,grid.9679.10000 0001 0663 9479Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Erika Kertes
- grid.9679.10000 0001 0663 9479Learning in Biological and Artificial Systems Research Group, Institute of Physiology, Medical School, University of Pécs, Pécs, Hungary ,grid.9679.10000 0001 0663 9479Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Institute of Physiology, Medical School, University of Pécs, Pécs, Hungary ,grid.9679.10000 0001 0663 9479Institute of Physiology, Medical School, University of Pécs, Szigeti Str. 12, P.O. Box: 99, Pécs, 7602 Hungary ,grid.9679.10000 0001 0663 9479Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Beáta Berta
- grid.9679.10000 0001 0663 9479Learning in Biological and Artificial Systems Research Group, Institute of Physiology, Medical School, University of Pécs, Pécs, Hungary ,grid.9679.10000 0001 0663 9479Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Institute of Physiology, Medical School, University of Pécs, Pécs, Hungary ,grid.9679.10000 0001 0663 9479Institute of Physiology, Medical School, University of Pécs, Szigeti Str. 12, P.O. Box: 99, Pécs, 7602 Hungary ,grid.9679.10000 0001 0663 9479Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Ádám Szabó
- grid.9679.10000 0001 0663 9479Learning in Biological and Artificial Systems Research Group, Institute of Physiology, Medical School, University of Pécs, Pécs, Hungary ,grid.9679.10000 0001 0663 9479Institute of Physiology, Medical School, University of Pécs, Szigeti Str. 12, P.O. Box: 99, Pécs, 7602 Hungary
| | - Kristóf László
- grid.9679.10000 0001 0663 9479Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Institute of Physiology, Medical School, University of Pécs, Pécs, Hungary ,grid.9679.10000 0001 0663 9479Institute of Physiology, Medical School, University of Pécs, Szigeti Str. 12, P.O. Box: 99, Pécs, 7602 Hungary ,grid.9679.10000 0001 0663 9479Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Rita Gálosi
- grid.9679.10000 0001 0663 9479Institute of Physiology, Medical School, University of Pécs, Szigeti Str. 12, P.O. Box: 99, Pécs, 7602 Hungary ,grid.9679.10000 0001 0663 9479Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Olga Zagoracz
- grid.9679.10000 0001 0663 9479Neuropeptides, Cognition, Animal Models of Neuropsychiatric Disorders Research Group, Institute of Physiology, Medical School, University of Pécs, Pécs, Hungary ,grid.9679.10000 0001 0663 9479Institute of Physiology, Medical School, University of Pécs, Szigeti Str. 12, P.O. Box: 99, Pécs, 7602 Hungary ,grid.9679.10000 0001 0663 9479Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Zoltán Karádi
- grid.9679.10000 0001 0663 9479Institute of Physiology, Medical School, University of Pécs, Szigeti Str. 12, P.O. Box: 99, Pécs, 7602 Hungary ,grid.9679.10000 0001 0663 9479Molecular Neuroendocrinology and Neurophysiology Research Group, Szentágothai Research Centre, University of Pécs, Pécs, Hungary ,grid.9679.10000 0001 0663 9479Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - László Péczely
- grid.9679.10000 0001 0663 9479Learning in Biological and Artificial Systems Research Group, Institute of Physiology, Medical School, University of Pécs, Pécs, Hungary ,grid.9679.10000 0001 0663 9479Institute of Physiology, Medical School, University of Pécs, Szigeti Str. 12, P.O. Box: 99, Pécs, 7602 Hungary ,grid.9679.10000 0001 0663 9479Centre for Neuroscience, University of Pécs, Pécs, Hungary
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Ollmann T, Lénárd L, Péczely L, Berta B, Kertes E, Zagorácz O, Hormay E, László K, Szabó Á, Gálosi R, Karádi Z, Kállai V. Effect of D1- and D2-like Dopamine Receptor Antagonists on the Rewarding and Anxiolytic Effects of Neurotensin in the Ventral Pallidum. Biomedicines 2022; 10:biomedicines10092104. [PMID: 36140205 PMCID: PMC9495457 DOI: 10.3390/biomedicines10092104] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2022] [Revised: 08/24/2022] [Accepted: 08/25/2022] [Indexed: 12/04/2022] Open
Abstract
Background: Neurotensin (NT) acts as a neurotransmitter and neuromodulator in the central nervous system. It was shown previously that NT in the ventral pallidum (VP) has rewarding and anxiolytic effects. NT exerts its effect in interaction with dopamine (DA) receptors in numerous brain areas; however, this has not yet been investigated in the VP. The aim of this study was to examine whether the inhibition of D1-like and D2-like DA receptors of the VP can modify the above mentioned effects of NT. Methods: Microinjection cannulas were implanted by means of stereotaxic operations into the VP of male Wistar rats. The rewarding effect of NT was examined by means of a conditioned place preference test. Anxiety was investigated with an elevated plus maze test. To investigate the possible interaction, D1-like DA receptor antagonist SCH23390 or D2-like DA receptor antagonist sulpiride were microinjected prior to NT. All of the drugs were also injected independently to analyze their effects alone. Results: In the present experiments, both the rewarding and anxiolytic effects of NT in the VP were prevented by both D1-like and D2-like DA receptor antagonists. Administered on their own, the antagonists did not influence reward and anxiety. Conclusion: Our present results show that the activity of the D1-like and D2-like DA receptors of the VP is a necessary requirement for both the rewarding and anxiolytic effects of NT.
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Affiliation(s)
- Tamás Ollmann
- Institute of Physiology, Medical School, University of Pécs, H-7624 Pécs, Hungary
- Centre for Neuroscience, University of Pécs, H-7624 Pécs, Hungary
- Correspondence: ; Tel.: +36-72-536000 (ext. 31095)
| | - László Lénárd
- Institute of Physiology, Medical School, University of Pécs, H-7624 Pécs, Hungary
- Centre for Neuroscience, University of Pécs, H-7624 Pécs, Hungary
- Molecular Neuroendocrinology and Neurophysiology Research Group, Szentágothai Center, University of Pécs, H-7624 Pécs, Hungary
| | - László Péczely
- Institute of Physiology, Medical School, University of Pécs, H-7624 Pécs, Hungary
- Centre for Neuroscience, University of Pécs, H-7624 Pécs, Hungary
| | - Beáta Berta
- Institute of Physiology, Medical School, University of Pécs, H-7624 Pécs, Hungary
- Centre for Neuroscience, University of Pécs, H-7624 Pécs, Hungary
| | - Erika Kertes
- Institute of Physiology, Medical School, University of Pécs, H-7624 Pécs, Hungary
- Centre for Neuroscience, University of Pécs, H-7624 Pécs, Hungary
| | - Olga Zagorácz
- Institute of Physiology, Medical School, University of Pécs, H-7624 Pécs, Hungary
- Centre for Neuroscience, University of Pécs, H-7624 Pécs, Hungary
| | - Edina Hormay
- Institute of Physiology, Medical School, University of Pécs, H-7624 Pécs, Hungary
- Centre for Neuroscience, University of Pécs, H-7624 Pécs, Hungary
| | - Kristóf László
- Institute of Physiology, Medical School, University of Pécs, H-7624 Pécs, Hungary
- Centre for Neuroscience, University of Pécs, H-7624 Pécs, Hungary
| | - Ádám Szabó
- Institute of Physiology, Medical School, University of Pécs, H-7624 Pécs, Hungary
- Centre for Neuroscience, University of Pécs, H-7624 Pécs, Hungary
| | - Rita Gálosi
- Institute of Physiology, Medical School, University of Pécs, H-7624 Pécs, Hungary
- Centre for Neuroscience, University of Pécs, H-7624 Pécs, Hungary
| | - Zoltán Karádi
- Institute of Physiology, Medical School, University of Pécs, H-7624 Pécs, Hungary
- Centre for Neuroscience, University of Pécs, H-7624 Pécs, Hungary
- Molecular Neuroendocrinology and Neurophysiology Research Group, Szentágothai Center, University of Pécs, H-7624 Pécs, Hungary
| | - Veronika Kállai
- Institute of Physiology, Medical School, University of Pécs, H-7624 Pécs, Hungary
- Centre for Neuroscience, University of Pécs, H-7624 Pécs, Hungary
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7
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László K, Kiss O, Vörös D, Mintál K, Ollmann T, Péczely L, Kovács A, Zagoracz O, Kertes E, Kállai V, László B, Hormay E, Berta B, Tóth A, Karádi Z, Lénárd L. Intraamygdaloid Oxytocin Reduces Anxiety in the Valproate-Induced Autism Rat Model. Biomedicines 2022; 10:biomedicines10020405. [PMID: 35203614 PMCID: PMC8962302 DOI: 10.3390/biomedicines10020405] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2022] [Revised: 01/26/2022] [Accepted: 01/31/2022] [Indexed: 12/10/2022] Open
Abstract
Background: Autism spectrum disorder (ASD) is a lifelong neurodevelopmental disorder affecting about 1.5% of children, and its prevalence is increasing. Anxiety is one of the most common comorbid signs of ASD. Despite the increasing prevalence, the pathophysiology of ASD is still poorly understood, and its proper treatment has not been defined yet. In order to develop new therapeutic approaches, the valproate- (VPA) induced rodent model of autism can be an appropriate tool. Oxytocin (OT), as a prosocial hormone, may ameliorate some symptoms of ASD. Methods: In the present study, we investigated the possible anxiolytic effect of intraamygdaloid OT on VPA-treated rats using the elevated plus maze test. Results: Our results show that male Wistar rats prenatally exposed to VPA spent significantly less time in the open arms of the elevated plus maze apparatus and performed significantly less head dips from the open arms. Bilateral OT microinjection into the central nucleus of the amygdala increased the time spent in the open arms and the number of head dips and reduced the anxiety to the healthy control level. An OT receptor antagonist blocked the anxiolytic effects of OT. The antagonist by itself did not influence the time rats spent in the open arms. Conclusions: Our results show that intraamygdaloid OT has anxiolytic effects in autistic rats.
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Affiliation(s)
- Kristóf László
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
- Correspondence: ; Tel.: +36-72-53624; Fax: +36-72-536244
| | - Orsolya Kiss
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
| | - Dávid Vörös
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
| | - Kitti Mintál
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
| | - Tamás Ollmann
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
| | - László Péczely
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
| | - Anita Kovács
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
| | - Olga Zagoracz
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
| | - Erika Kertes
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
| | - Veronika Kállai
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
| | - Bettina László
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
| | - Edina Hormay
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
| | - Beáta Berta
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
| | - Attila Tóth
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
| | - Zoltán Karádi
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
- Szentágothai Center, Molecular Endocrinology and Neurophysiology Research Group, University of Pécs, 7624 Pécs, Hungary
| | - László Lénárd
- Medical School, Institute of Physiology, University of Pécs, 7624 Pécs, Hungary; (O.K.); (D.V.); (K.M.); (T.O.); (L.P.); (A.K.); (O.Z.); (E.K.); (V.K.); (B.L.); (E.H.); (B.B.); (A.T.); (Z.K.); (L.L.)
- Neuroscience Center, University of Pécs, 7624 Pécs, Hungary
- Szentágothai Center, Molecular Endocrinology and Neurophysiology Research Group, University of Pécs, 7624 Pécs, Hungary
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8
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Péczely L, Kékesi G, Kállai V, Ollmann T, László K, Büki A, Lénárd L, Horváth G. Effects of D 2 dopamine receptor activation in the ventral pallidum on sensory gating and food-motivated learning in control and schizophrenia model (Wisket) rats. Behav Brain Res 2020; 400:113047. [PMID: 33279633 DOI: 10.1016/j.bbr.2020.113047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2020] [Revised: 11/24/2020] [Accepted: 11/25/2020] [Indexed: 11/28/2022]
Abstract
Dopamine D2 receptors (D2Rs) of the ventral pallidum (VP) play important role in motivational and learning processes, however, their potential role in triggering schizophrenic symptoms has not been investigated, yet. In the present experiments the effects of locally administered D2R agonist quinpirole were investigated on behavioral parameters related to sensorimotor gating, motor activity and food-motivated labyrinth learning. Two weeks after bilateral implantation of microcannulae into the VP, the acute (30 min) and delayed (3, 21 and 24 h) effects of quinpirole microinjection (1 μg/0.4 μL at both sides) were investigated in Wistar and schizophrenia model (Wisket substrain) rats in prepulse inhibition (PPI) and the reward-based Ambitus tests. Quinpirole administration did not modify the impaired sensorimotor gating in Wisket rats, but it led to significant deficit in Wistar animals. Regarding the locomotor activity in the Ambitus test, no effects of quinpirole were detected in either groups at the investigated time points. In contrast, quinpirole resulted in decreased exploratory and food-collecting activities in Wistar rats with 21 and 24 h delay. Though, impaired food-related motivation could be observed in Wisket rats, but quinpirole treatment did not result in further deterioration. In summary, our results showed that the VP D2R activation in Wistar rats induces symptoms similar to those observed in schizophrenia model Wisket rats. These data suggest that Wisket rats might have significant alterations in the functional activity of VP, which might be due to its enhanced dopaminergic activity.
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Affiliation(s)
- László Péczely
- Institute of Physiology, Faculty of Medicine, University of Pécs, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary.
| | - Gabriella Kékesi
- Department of Physiology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - Veronika Kállai
- Institute of Physiology, Faculty of Medicine, University of Pécs, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
| | - Tamás Ollmann
- Institute of Physiology, Faculty of Medicine, University of Pécs, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
| | - Kristóf László
- Institute of Physiology, Faculty of Medicine, University of Pécs, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
| | - Alexandra Büki
- Department of Physiology, Faculty of Medicine, University of Szeged, Szeged, Hungary
| | - László Lénárd
- Institute of Physiology, Faculty of Medicine, University of Pécs, Pécs, Hungary; Molecular Neuroendocrinology and Neurophysiology Research Group, Szentágothai Research Centre, Pécs University, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
| | - Gyöngyi Horváth
- Department of Physiology, Faculty of Medicine, University of Szeged, Szeged, Hungary
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9
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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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10
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László BR, Hormay E, Szabó I, Mintál K, Nagy B, László K, Péczely L, Ollmann T, Lénárd L, Karádi Z. Disturbance of taste reactivity and other behavioral alterations after bilateral interleukin-1β microinjection into the cingulate cortex of the rat. Behav Brain Res 2020; 383:112537. [PMID: 32032742 DOI: 10.1016/j.bbr.2020.112537] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Revised: 02/03/2020] [Accepted: 02/03/2020] [Indexed: 11/26/2022]
Abstract
The anterior cingulate cortex (ACC), is known to be intimately involved in food-related motivational processes and their behavioral organization, primarily by evaluating hedonic properties of the relevant stimuli. In the present study, the involvement of cingulate cortical interleukin-1β (IL-1β) mediated mechanisms in a) gustation associated facial and somato-motor behavioral patterns of Wistar rats were examined in taste reactivity test (TR). In addition, b) conditioned taste aversion (CTA) paradigm was performed to investigate the role of these cytokine mechanisms in taste sensation associated learning processes, c) the general locomotor activity of the animals was observed in open field test (OPF), and d) the potentially negative reinforcing effect of IL-1β was examined in conditioned place preference test (CPP). During the TR test, species specific behavioral patterns in response to the five basic tastes were analyzed. Response rates of ingestive and aversive patterns of the cytokine treated and the control groups differed significantly in case of the weaker bitter (QHCl, 0.03 mM), and the stronger umami (MSG, 0.5 M) tastes. IL-1β itself did not elicit CTA, it did not interfere with the acquisition of LiCl induced CTA, and it also failed to cause place preference or aversion in the CPP test. In the OPF paradigm, however, significant differences were found between the cytokine treated and the control groups in the rearing and grooming, the number of crossings, and in the distance moved. Our results indicate the involvement of cingulate cortical IL-1β mechanisms in the control of taste perception and other relevant behavioral processes.
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Affiliation(s)
- Bettina Réka László
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, Pécs, Hungary.
| | - Edina Hormay
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - István Szabó
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Kitti Mintál
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Bernadett Nagy
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Kristóf László
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - László Péczely
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Tamás Ollmann
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - László Lénárd
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, Pécs, Hungary; Molecular Neuroendocrinology and Neurophysiology Research Group, Szentágothai Research Centre, University of Pécs, Pécs, Hungary
| | - Zoltán Karádi
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, Szentágothai Research Centre, University of Pécs, Pécs, Hungary; Molecular Neuroendocrinology and Neurophysiology Research Group, Szentágothai Research Centre, University of Pécs, Pécs, Hungary
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11
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Kállai V, Lénárd L, Péczely L, Gálosi R, Dusa D, Tóth A, László K, Kertes E, Kovács A, Zagoracz O, Berta B, Karádi Z, Ollmann T. Cognitive performance of the MAM-E17 schizophrenia model rats in different age-periods. Behav Brain Res 2020; 379:112345. [PMID: 31704232 DOI: 10.1016/j.bbr.2019.112345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 10/03/2019] [Accepted: 11/04/2019] [Indexed: 11/17/2022]
Abstract
Cognitive disturbances are among the most important features of schizophrenia, and have a significant role in the outcome of the disease. However, the treatment of cognitive symptoms is poorly effective. In order to develop new therapeutic opportunities, the MAM-E17 rat model of schizophrenia can be an appropriate implement. In the present study we investigated several cognitive capabilities of MAM-treated rats using radial arm maze (RAM) task, which corresponds to the recent research directives. Because of the diachronic appearance of schizophrenia symptoms and the early appearance of cognitive deficiencies, we carried out our experiments in three different age-periods of rats, i.e. in prepuberty, late puberty and adulthood. The performance of MAM-E17 rats was similar to control rats in the acquisition phase of RAM task, except for puberty. However, after rearrangement of reward positions (in the reverse paradigm) the number of errors of MAM-treated rats was higher in each age-period. In the reverse paradigm MAM-treated groups visited more frequently those non-rewarding arms, which were previously rewarding. Our results suggest that working memory of MAM-E17 rats is impaired. This deficit depends on the difficulty of the task and on the age-period. MAM-E17 rats seem to be more sensitive in puberty in comparison to controls. Diminished behavioral flexibility was shown as well. These behavioral results observed in MAM-E17 rats were similar to those of cognitive deficiencies in schizophrenia patients. Therefore, MAM-E17 model can be a useful implement for further research aiming to improve cognition in schizophrenia.
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Affiliation(s)
- Veronika Kállai
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
| | - László Lénárd
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Molecular Neuroendocrinology and Neurophysiology Research Group, Szentágothai Research Centre, Pécs University, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary.
| | - László Péczely
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
| | - Rita Gálosi
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
| | - Daniella Dusa
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
| | - Attila Tóth
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
| | - Kristóf László
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
| | - Erika Kertes
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
| | - Anita Kovács
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
| | - Olga Zagoracz
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
| | - Beáta Berta
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
| | - Zoltán Karádi
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Molecular Neuroendocrinology and Neurophysiology Research Group, Szentágothai Research Centre, Pécs University, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
| | - Tamás Ollmann
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Centre for Neuroscience, Pécs University, Pécs, Hungary
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12
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Zagorácz O, Ollmann T, Péczely L, László K, Kovács A, Berta B, Kállai V, Kertes E, Lénárd L. QRFP administration into the medial hypothalamic nuclei improves memory in rats. Brain Res 2019; 1727:146563. [PMID: 31765630 DOI: 10.1016/j.brainres.2019.146563] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 10/31/2019] [Accepted: 11/19/2019] [Indexed: 10/25/2022]
Abstract
Even though several of RFamide peptides have been shown to modify memory and learning processes in different species, almost nothing is known regarding cognitive effects of recently discovered neuropeptide QRFP. Considering multiple physiological functions of QRFP, localization of QRFP-synthesizing neurons in the hypothalamus and its' widely spread binding sites within the CNS, the present study was designed to investigate the possible role of QRFP in the consolidation of spatial memory. As target area for microinjection, the medial hypothalamic area, including dorsomedial (DMN) and ventromedial (VMN) nuclei, has been chosen. At first, the effects of two doses (200 ng and 400 ng) of QRFP were investigated in Morris water maze. After that receptor antagonist BIBP3226 (equimolar amount to the effective dose of neuropeptide) was applied to elucidate whether it can prevent effects of QRFP. To reveal possible changes in anxiety level, animals were tested in Elevated plus maze. The higher dose of QRFP (400 ng) improved short-term memory consolidation in Morris water maze. Pretreatment with antagonist BIBP3226 abolished cognitive effects of QRFP. The neuropeptide did not affect anxiety level of rats. This study provides unique evidence regarding the role of QRFP in the consolidation of memory and gives the basis for further investigations of neuropeptide's cognitive effects.
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Affiliation(s)
- Olga Zagorácz
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
| | - Tamás Ollmann
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
| | - László Péczely
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
| | - Kristóf László
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
| | - Anita Kovács
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
| | - Beáta Berta
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
| | - Veronika Kállai
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
| | - Erika Kertes
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
| | - László Lénárd
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary; Molecular Neurophysiology Research Group, Pécs University, Szentágothai Research Center, Pécs, Hungary.
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13
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Berta B, Kertes E, Péczely L, Ollmann T, László K, Gálosi R, Kállai V, Petykó Z, Zagorácz O, Kovács A, Karádi Z, Lénárd L. Ventromedial prefrontal cortex is involved in preference and hedonic evaluation of tastes. Behav Brain Res 2019; 367:149-157. [PMID: 30940513 DOI: 10.1016/j.bbr.2019.03.051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Revised: 03/29/2019] [Accepted: 03/29/2019] [Indexed: 01/01/2023]
Abstract
The ventromedial prefrontal cortex (vmPFC) of rats has reciprocal connections with the gustatory and the hedonic impact coding structures. The main goal of the present study was to investigate the involvement of local neurons of vmPFC and their catecholaminergic innervations in taste preference and taste reactivity test. Therefore, kainate or 6-hydroxydopamine (6-OHDA) lesions were performed in the vmPFC by iontophoretic method. In the first experiment, taste preference was tested to 250 mM and 500 mM glucose solutions over water in two-bottle choice test. In the second experiment, taste reactivity was examined to 4 concentrations of glucose solutions (250 mM, 500 mM, 750 mM and 1000 mM) and 4 concentrations of quinine solutions (0.125 mM, 0.25 mM, 1.25 mM and 2.5 mM). Our results showed, that kainate microlesion of vmPFC did not modify the preference of 250 mM and 500 mM glucose solutions in two-bottle choice test. In contrast, 6-OHDA microlesion of vmPFC resulted in increased preference to the higher concentration of glucose (500 mM) solution over water. Results of taste reactivity test showed that kainate lesion resulted in more ingestive and less rejective responses to 750 mM glucose solution and elevated rejectivity to the higher concentrations (1.25 mM and 2.5 mM) of quinine solutions. 6-OHDA lesion of vmPFC increased the number of ingestive responses to highly concentrated (500 mM, 750 mM and 1000 mM) glucose solutions and decreased the number of ingestive responses to the lower concentration (0.125 mM) of quinine solution. The present data provide evidence for the important role of vmPFC neurons and catecholaminergic innervation of the vmPFC in the regulation of hedonic evaluation of tastes and in the hedonic consummatory behavior.
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Affiliation(s)
- Beáta Berta
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Erika Kertes
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - László Péczely
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Tamás Ollmann
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Kristóf László
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Rita Gálosi
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Veronika Kállai
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Zoltán Petykó
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Neuroscience Center, Pécs University, Pécs, Hungary; Molecular Neuroendocrinology Research Group, Szentágothai Research Center, Pécs University, Pécs, Hungary
| | - Olga Zagorácz
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Anita Kovács
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Zoltán Karádi
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Neuroscience Center, Pécs University, Pécs, Hungary; Molecular Neuroendocrinology Research Group, Szentágothai Research Center, Pécs University, Pécs, Hungary
| | - László Lénárd
- Institute of Physiology, Medical School, Pécs University, Pécs, Hungary; Neuroscience Center, Pécs University, Pécs, Hungary; Molecular Neuroendocrinology Research Group, Szentágothai Research Center, Pécs University, Pécs, Hungary.
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14
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Berta B, Péczely L, Kertes E, Petykó Z, Ollmann T, László K, Kállai V, Kovács A, Zagorácz O, Gálosi R, Karádi Z, Lénárd L. Iontophoretic microlesions with kainate or 6-hydroxidopamine in ventromedial prefrontal cortex result in deficit in conditioned taste avoidance to palatable tastants. Brain Res Bull 2018; 143:106-115. [PMID: 30347263 DOI: 10.1016/j.brainresbull.2018.10.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 09/12/2018] [Accepted: 10/04/2018] [Indexed: 02/08/2023]
Abstract
Effects of kainate or 6-hydroxidopamine (6-OHDA) lesions in the ventromedial prefrontal cortex (vmPFC) on taste-related learning and memory processes were examined. Neurotoxins were applied by iontophoretic method to minimize the extent of lesion and the side effects. Acquisition and retention of conditioned taste avoidance (CTA) was tested to different taste stimuli (0.05 M NaCl, 0.01 M saccharin, 0.01 M citrate and 0.00025 M quinine). In the first experiment, palatability index of taste solutions with these concentrations has been determined as strongly palatable (NaCl, saccharin), weakly palatable (citrate) and weakly unpalatable (quinine) taste stimuli. In two other experiments vmPFC lesions were performed before CTA (acquisition) or after CTA (retrieval). Our results showed that both kainate and 6-OHDA microlesions of vmPFC resulted in deficit of CTA acquisition (to NaCl, saccharin and citrate) and retrieval (to NaCl and saccharin). Deficits were specific to palatable tastants, particularly those that are strongly palatable, and did not occur for unpalatable stimulus. The present data provide evidence for the important role of vmPFC neurons and catecholaminergic innervation of the vmPFC in taste related learning and memory processes.
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Affiliation(s)
- Beáta Berta
- Institute of Physiology, Medical School, Pécs University, Pécs Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - László Péczely
- Institute of Physiology, Medical School, Pécs University, Pécs Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Erika Kertes
- Institute of Physiology, Medical School, Pécs University, Pécs Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Zoltán Petykó
- Institute of Physiology, Medical School, Pécs University, Pécs Hungary; Neuroscience Center, Pécs University, Pécs, Hungary; Molecular Neuroendocrinology Research Group, Szentágothai Research Center, Pécs University, Pécs, Hungary
| | - Tamás Ollmann
- Institute of Physiology, Medical School, Pécs University, Pécs Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Kristóf László
- Institute of Physiology, Medical School, Pécs University, Pécs Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Veronika Kállai
- Institute of Physiology, Medical School, Pécs University, Pécs Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Anita Kovács
- Institute of Physiology, Medical School, Pécs University, Pécs Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Olga Zagorácz
- Institute of Physiology, Medical School, Pécs University, Pécs Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Rita Gálosi
- Institute of Physiology, Medical School, Pécs University, Pécs Hungary; Neuroscience Center, Pécs University, Pécs, Hungary
| | - Zoltán Karádi
- Institute of Physiology, Medical School, Pécs University, Pécs Hungary; Neuroscience Center, Pécs University, Pécs, Hungary; Molecular Neuroendocrinology Research Group, Szentágothai Research Center, Pécs University, Pécs, Hungary
| | - László Lénárd
- Institute of Physiology, Medical School, Pécs University, Pécs Hungary; Neuroscience Center, Pécs University, Pécs, Hungary; Molecular Neuroendocrinology Research Group, Szentágothai Research Center, Pécs University, Pécs, Hungary.
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15
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Affiliation(s)
- M. Mohai
- Institute for Materials and Environmental Chemistry, Research Centre for Natural Sciences; Hungarian Academy of Sciences; PO Box 286 Budapest H-1519 Hungary
| | - K. László
- Department of Physical Chemistry and Materials Science; Budapest University of Technology and Economics; Budapest Hungary
| | - I. Bertóti
- Institute for Materials and Environmental Chemistry, Research Centre for Natural Sciences; Hungarian Academy of Sciences; PO Box 286 Budapest H-1519 Hungary
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16
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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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17
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Kállai V, Tóth A, Gálosi R, Péczely L, Ollmann T, Petykó Z, László K, Kállai J, Szabó I, Karádi Z, Lénárd L. The MAM-E17 schizophrenia rat model: Comprehensive behavioral analysis of pre-pubertal, pubertal and adult rats. Behav Brain Res 2017; 332:75-83. [DOI: 10.1016/j.bbr.2017.05.065] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 05/26/2017] [Accepted: 05/28/2017] [Indexed: 01/17/2023]
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18
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Csetényi B, Hormay E, Szabó I, Takács G, Nagy B, László K, Karádi Z. Food and water intake, body temperature and metabolic consequences of interleukin-1β microinjection into the cingulate cortex of the rat. Behav Brain Res 2017; 331:115-122. [PMID: 28527691 DOI: 10.1016/j.bbr.2017.05.041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2017] [Revised: 05/04/2017] [Accepted: 05/16/2017] [Indexed: 12/30/2022]
Abstract
In order to elucidate whether cytokine mechanisms of the cingulate cortex (cctx) are important in the central regulation of homeostasis, in the present study, feeding-metabolic effects of direct bilateral microinjection of interleukin-1β (IL-1β) into the cctx of the rat have been investigated. Short- (2h), medium (12h) and long-term (24h) food and water intakes and body temperature were measured after the intracerebral administration of this primary cytokine or vehicle solution, with or without paracetamol pretreatment. The effect of IL-1β on the blood glucose level of animals was examined in glucose tolerance test (GTT), and concentrations of relevant plasma metabolites (total cholesterol, HDL, LDH, triglycerides, uric acid) were additionally also determined following the above microinjections. In contrast to causing no major alteration in the food and water intakes, the cytokine treatment evoked significant increase in the body temperature of the rats. Prostaglandin-mediated mechanisms were shown to have important role in the mode of this action of IL-1β, since paracetamol pretreatment partially prevented the development of the above mentioned hyperthermia. In the GTT, no considerable difference was observed between the blood glucose levels of the cytokine treated and control animals. Following IL-1β microinjection, however, significant decrease of HDL and total cholesterol was found. Our present findings indicate that elucidating the IL-1β mediated homeostatic control mechanisms in the cingulate cortex may lead to the better understanding not only the regulatory entities of the healthy organism but also those found in obesity, diabetes mellitus and other worldwide rapidly spreading feeding-metabolic disorders.
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Affiliation(s)
- B Csetényi
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, University of Pécs, Pécs, Hungary.
| | - E Hormay
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - I Szabó
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - G Takács
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - B Nagy
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - K László
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, University of Pécs, Pécs, Hungary
| | - Z Karádi
- Institute of Physiology, University of Pécs, Medical School, Pécs, Hungary; Centre for Neuroscience, University of Pécs, Pécs, Hungary; Molecular Neuroendocrinology and Neurophysiology Research Group, Szentágothai Research Center, University of Pécs, Pécs, Hungary
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19
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Kovács A, László K, Zagoracz O, Ollmann T, Péczely L, Gálosi R, Lénárd L. Effects of RFamide-related peptide-1 (RFRP-1) microinjections into the central nucleus of amygdala on passive avoidance learning in rats. Neuropeptides 2017; 62:81-86. [PMID: 27993374 DOI: 10.1016/j.npep.2016.12.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2016] [Revised: 10/31/2016] [Accepted: 12/11/2016] [Indexed: 11/16/2022]
Abstract
The amygdaloid body (AMY) plays an important role in memory, learning and reward-related processes. RFRP-1 immunoreactive fibers and NPFF receptors were identified in the AMY, and previously we verified that RFRP-1 infused into the central nucleus of AMY (CeA) induced place preference. The aim of the present study was to examine the possible effects of RFRP-1 in the CeA on passive avoidance learning. Male Wistar rats were examined in two-compartment passive avoidance paradigm. Animals were shocked with 0.5mA current and subsequently were microinjected bilaterally with 50ng or 100ng RFRP-1 in volume of 0.4μl, or 20ng NPFF receptor antagonist RF9 (ANT) alone, or antagonist 15min before 50ng RFRP-1 treatments into the CeA. Fifty nanogram dose of RFRP-1 significantly increased the step-through latency time, the 100ng RFRP-1 and the ANT alone were ineffective. The effect of 50ng RFRP-1 was eliminated by the ANT pretreatment. Our results suggest that intraamygdaloid RFRP-1 enhances learning processes and memory in aversive situations and this effect can specifically be prevented by ANT pretreatment.
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Affiliation(s)
- Anita Kovács
- Institute of Physiology, Pécs University Medical School, Hungary
| | - Kristóf László
- Institute of Physiology, Pécs University Medical School, Hungary
| | - Olga Zagoracz
- Institute of Physiology, Pécs University Medical School, Hungary
| | - Tamás Ollmann
- Institute of Physiology, Pécs University Medical School, Hungary
| | - László Péczely
- Institute of Physiology, Pécs University Medical School, Hungary
| | - Rita Gálosi
- Institute of Physiology, Pécs University Medical School, Hungary
| | - László Lénárd
- Institute of Physiology, Pécs University Medical School, Hungary; Molecular Neurophysiology Research Group, Pécs University, Szentágothai Research Center, Pécs, Hungary.
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Merkel A, Satayeva A, Cannon F, Howell C, Meikle S, László K, Inglezakis V, Jandosov J, Ray S, Mansurov Z, Mikhalovsky S. Characterisation of Activated Carbons Obtained from Rice Husk. Eurasian Chem Tech J 2017. [DOI: 10.18321/ectj472] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Rice husk derived activated carbons doped with nitrogen have been studied using low temperature nitrogen adsorption, scanning electron microscopy, mercury porosimetry, thermogravimetric analysis combined with mass-spectrometry, differential scanning calorimetry and X-ray photoelectron spectroscopy. It has been shown that N-doped activated carbon produced by high temperature treatment of the starting material soaked with urea, has a significantly higher anion exchange capacity than the other samples studied, which correlates with its higher adsorption capacity towards nitrate ion removal from aqueous solutions with the initial concentration of 5 and 15 ppm.
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Borbély É, Hajna Z, Nabi L, Scheich B, Tékus V, László K, Ollmann T, Kormos V, Gaszner B, Karádi Z, Lénárd L, Paige CJ, Quinn JP, Szolcsányi J, Pintér E, Keeble J, Berger A, Helyes Z. Hemokinin-1 mediates anxiolytic and anti-depressant-like actions in mice. Brain Behav Immun 2017; 59:219-232. [PMID: 27621226 DOI: 10.1016/j.bbi.2016.09.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2016] [Revised: 08/25/2016] [Accepted: 09/07/2016] [Indexed: 01/23/2023] Open
Abstract
The tachykinin NK1 receptor was suggested to be involved in psychiatric disorders, but its antagonists have failed to be effective as antidepressants in clinical trials. Hemokinin-1 (HK-1), the newest tachykinin, is present in several brain regions and activates the NK1 receptor similarly to substance P (SP), but acts also through other mechanisms. Therefore, we investigated the roles of the Tac4 gene-derived HK-1 in comparison with SP and neurokinin A (NKA) encoded by the Tac1 gene, as well as the NK1 receptor in anxiety and depression-like behaviors in mice. Mice lacking SP/NKA, HK-1 or the NK1 receptor (Tac1-/-, Tac4-/-, Tacr1-/-, respectively) compared to C57Bl/6 wildtypes (WT), and treatment with the NK1 antagonist CP99994 were used in the experiments. Anxiety was evaluated in the light-dark box (LDB) and the elevated plus maze (EPM), locomotor activity in the open field (OFT) tests. Hedonic behavior was assessed in the sucrose preference test (SPT), depression-like behavior in the tail suspension (TST) and forced swim (FST) tests. FST-induced neuronal responsiveness was evaluated with Fos immunohistochemistry in several stress-related brain regions. In the LDB, Tac4-/- mice spent significantly less, while Tacr1-/- and CP99994-treated mice spent significantly more time in the lit compartment. In the EPM only Tac4-/- showed reduced time in the open arms, but no difference was observed in any other groups. In the OFT Tac4-/- mice showed significantly reduced, while Tac1-/- and Tacr1-/- animals increased motility than the WTs, but CP99994 had no effect. NK1-/- consumed markedly more, while Tac4-/- less sucrose solution compared to WTs. In the TST and FST, Tac4-/- mice showed significantly increased immobility. However, depression-like behavior was decreased both in cases of genetic deletion and pharmacological blockade of the NK1 receptor. FST-induced neuronal activation in different nuclei involved in behavioral and neuroendocrine stress responses was significantly reduced in the brain of Tac4 -/- mice. Our results provide the first evidence for an anxiolytic and anti-depressant-like actions of HK-1 through a presently unknown target-mediated mechanism. Identification of its receptor and/or signaling pathways might open new perspectives for anxiolytic and anti-depressant therapies.
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Affiliation(s)
- Éva Borbély
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Hungary; János Szentágothai Research Centre, Centre for Neuroscience, University of Pécs, Hungary
| | - Zsófia Hajna
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Hungary; János Szentágothai Research Centre, Centre for Neuroscience, University of Pécs, Hungary
| | - Liza Nabi
- King's College London, Institute of Pharmaceutical Science, London, UK
| | - Bálint Scheich
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Hungary; János Szentágothai Research Centre, Centre for Neuroscience, University of Pécs, Hungary
| | - Valéria Tékus
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Hungary; János Szentágothai Research Centre, Centre for Neuroscience, University of Pécs, Hungary
| | - Kristóf László
- Department of Physiology, Medical School, University of Pécs, Hungary
| | - Tamás Ollmann
- Department of Physiology, Medical School, University of Pécs, Hungary
| | - Viktória Kormos
- Department of Anatomy, Medical School, University of Pécs, Hungary
| | - Balázs Gaszner
- Department of Anatomy, Medical School, University of Pécs, Hungary
| | - Zoltán Karádi
- Department of Physiology, Medical School, University of Pécs, Hungary
| | - László Lénárd
- Department of Physiology, Medical School, University of Pécs, Hungary
| | | | - John P Quinn
- Department of Molecular and Clinical Pharmacology, Institute of Translational Medicine Liverpool University, Liverpool, UK
| | - János Szolcsányi
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Hungary; János Szentágothai Research Centre, Centre for Neuroscience, University of Pécs, Hungary
| | - Erika Pintér
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Hungary; János Szentágothai Research Centre, Centre for Neuroscience, University of Pécs, Hungary
| | - Julie Keeble
- King's College London, Institute of Pharmaceutical Science, London, UK
| | - Alexandra Berger
- Princess Margaret Cancer Centre, University Health Network, Toronto, Canada
| | - Zsuzsanna Helyes
- Department of Pharmacology and Pharmacotherapy, Medical School, University of Pécs, Hungary; János Szentágothai Research Centre, Centre for Neuroscience, University of Pécs, Hungary; MTA-PTE NAP B Chronic Pain Research Group, Hungary.
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Berke B, Czakkel O, Porcar L, Geissler E, László K. Static and dynamic behaviour of responsive graphene oxide-poly(N-isopropyl acrylamide) composite gels. Soft Matter 2016; 12:7166-7173. [PMID: 27494097 DOI: 10.1039/c6sm00666c] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Thermoresponsive hydrogels have enormous potential e.g., as sensors, actuators, and pollution control remedies or in drug delivery systems. Nevertheless, their application is often restricted by physical limitations (poor mechanical strength and uncontrolled thermal response). Composite systems may offer a means of overcoming these limitations. This paper presents a systematic study of the structure and dynamics of graphene oxide-poly-(N-isopropylacrylamide) composite systems, and investigates the effect of the nanoparticle filler content on the mechanical and swelling properties of the systems. A combination of macroscopic (swelling and elastic modulus) and microscopic (differential scanning microcalorimetry, small angle neutron scattering and neutron spin-echo spectroscopy) investigations reveals that the architecture of the polymer network is modified by chain nucleation at the surface of the GO platelets, and these form a percolating network inside the gel. Our results show that the elastic modulus of the gels is reinforced by the filler, but the mobility of the polymer chains in the swollen state is practically unaffected. The macroscopic deswelling of the composites, however, is slowed by the kinetics of ordering in the GO network.
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Affiliation(s)
- B Berke
- Institut Laue Langevin, CS 20156, F - 38042 Grenoble Cedex 9, France.
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Zagorácz O, Kovács A, László K, Ollmann T, Péczely L, Lénárd L. Effects of direct QRFP-26 administration into the medial hypothalamic area on food intake in rats. Brain Res Bull 2015; 118:58-64. [PMID: 26385088 DOI: 10.1016/j.brainresbull.2015.09.004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 09/08/2015] [Accepted: 09/14/2015] [Indexed: 10/23/2022]
Abstract
The RFamide peptide family comprises a number of biologically active peptides sharing RF motif at their C-terminal end. These peptides are involved in the control of multiple physiological functions including regulation of metabolism and feeding behavior. QRFP-43 as well as its 26-aminoacid residue QRFP-26 are able to cause orexigenic effect when administered to the rodents' cerebral ventricles. QRFPs have been suggested as the endogenous ligands of the previously orphan GPR103 receptors. GPR103 receptors share amino acid identity with other receptors of neuropeptides involved in feeding (NPY, NPFF, galanin). QRFP-26 expressing neurons and binding sites are densely present in the rat medial hypothalamus (MHA), an area directly responsible for the regulation of feeding. QRFP-26 was delivered to the target area by direct intrahypothalamic microinjection, and the consumption of liquid food was measured over a 60 min period. Both doses (100 and 200 ng) significantly increased food intake. Non-specific receptor antagonist BIBP3226 eliminated the orexigenic effect caused by QRFP-26 administration. Effective doses of QRFP-26 did not modify general locomotor activity and behavioral patterns examined in the open-field test. This study is the first reporting feeding modulating effects following direct intrahypothalamic QRFP-26 administration.
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Affiliation(s)
- Olga Zagorácz
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
| | - Anita Kovács
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
| | - Kristóf László
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
| | - Tamás Ollmann
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
| | - László Péczely
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
| | - László Lénárd
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary; Molecular Neurophysiology Research Group, Pécs University, Szentágothai Research Center, Pécs, Hungary.
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24
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Ollmann T, Péczely L, László K, Kovács A, Gálosi R, Kertes E, Kállai V, Zagorácz O, Karádi Z, Lénárd L. Anxiolytic effect of neurotensin microinjection into the ventral pallidum. Behav Brain Res 2015; 294:208-14. [PMID: 26296669 DOI: 10.1016/j.bbr.2015.08.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2015] [Revised: 08/10/2015] [Accepted: 08/13/2015] [Indexed: 01/31/2023]
Abstract
Neurotensin (NT) acts as a neurotransmitter and neuromodulator in the central nervous system. NT is involved in reward and memory processes, drug addiction and also in the regulation of anxiety. The ventral pallidum (VP) receives neurotensinergic innervation from the ventral striatopallidal pathway originating from the nucleus accumbens. Positive reinforcing effects of NT in the VP had been shown recently, however the possible effects of NT on anxiety have not been examined yet. In our present experiments, the effects of NT on anxiety were investigated in the VP. In male Wistar rats bilateral microinjections of 100 ng or 250 ng NT were delivered in the volume of 0.4 μl into the VP, and elevated plus maze (EPM) test was performed. In another groups of animals, 35 ng NT-receptor 1 (NTR1) antagonist SR 48,692 was applied by itself, or microinjected 15 min before 100 ng NT treatment. Open field test (OPF) was also conducted. The 100 ng dose of NT had anxiolytic effect, but the 250 ng NT did not influence anxiety. The antagonist pretreatment inhibited the effect of NT, while the antagonist itself had no effect. In the OPF test there was no difference among the groups. Our present results show that microinjection of NT into the VP induces anxiolytic effect, which is specific to the NTR1 receptors because it can be eliminated by a specific NTR1 antagonist. It is also substantiated that neither the NT, nor the NTR1 antagonist in the VP influences locomotor activity.
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Affiliation(s)
- Tamás Ollmann
- Institute of Physiology, Pécs University, Medical School, Pécs, Hungary
| | - László Péczely
- Institute of Physiology, Pécs University, Medical School, Pécs, Hungary
| | - Kristóf László
- Institute of Physiology, Pécs University, Medical School, Pécs, Hungary
| | - Anita Kovács
- Institute of Physiology, Pécs University, Medical School, Pécs, Hungary
| | - Rita Gálosi
- Institute of Physiology, Pécs University, Medical School, Pécs, Hungary
| | - Erika Kertes
- Institute of Physiology, Pécs University, Medical School, Pécs, Hungary
| | - Veronika Kállai
- Institute of Physiology, Pécs University, Medical School, Pécs, Hungary
| | - Olga Zagorácz
- Institute of Physiology, Pécs University, Medical School, Pécs, Hungary
| | - Zoltán Karádi
- Institute of Physiology, Pécs University, Medical School, Pécs, Hungary; Molecular Neuroendocrinology and Neurophysiology Research Group, Pécs University, Szentágothai Center, Pécs, Hungary
| | - László Lénárd
- Institute of Physiology, Pécs University, Medical School, Pécs, Hungary; Molecular Neuroendocrinology and Neurophysiology Research Group, Pécs University, Szentágothai Center, Pécs, Hungary.
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Lénárd L, Kovács A, Ollmann T, Péczely L, Zagoracz O, Gálosi R, László K. Positive reinforcing effects of RFamide-related peptide-1 in the rat central nucleus of amygdala. Behav Brain Res 2014; 275:101-6. [DOI: 10.1016/j.bbr.2014.08.051] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2014] [Revised: 08/24/2014] [Accepted: 08/26/2014] [Indexed: 12/28/2022]
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26
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Péczely L, Ollmann T, László K, Kovács A, Gálosi R, Szabó Á, Karádi Z, Lénárd L. Effects of ventral pallidal D1 dopamine receptor activation on memory consolidation in morris water maze test. Behav Brain Res 2014; 274:211-8. [DOI: 10.1016/j.bbr.2014.07.031] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Revised: 07/11/2014] [Accepted: 07/21/2014] [Indexed: 10/24/2022]
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27
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Péczely L, Ollmann T, László K, Kovács A, Gálosi R, Szabó Á, Karádi Z, Lénárd L. Role of D1 dopamine receptors of the ventral pallidum in inhibitory avoidance learning. Behav Brain Res 2014; 270:131-6. [DOI: 10.1016/j.bbr.2014.04.054] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2014] [Revised: 04/28/2014] [Accepted: 04/30/2014] [Indexed: 10/25/2022]
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28
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Kovács A, László K, Gálosi R, Tóth K, Ollmann T, Péczely L, Lénárd L. Microinjection of RFRP-1 in the central nucleus of amygdala decreases food intake in the rat. Brain Res Bull 2012; 88:589-95. [PMID: 22691952 DOI: 10.1016/j.brainresbull.2012.06.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Revised: 05/31/2012] [Accepted: 06/01/2012] [Indexed: 10/28/2022]
Abstract
Several members of the RFamide peptide family are known to have role in the regulation of feeding. For example, neuropeptide FF and prolactin-releasing peptide cause anorexigenic, while 26RFa and QRFP result in orexigenic effects in rodents. I.c.v. microinjection of neuropeptide RFRP-1 significantly reduced food and water intake in chicks. However, feeding related effects of RFRP-1 have not been studied in mammals yet. The central part of amygdala (CeA) is essentially involved in the regulation of feeding and body weight. RFRP-1 positive nerve cells were detected in the rat hypothalamus and RFRP-1 immunoreactive fibers were identified in the CeA. RFRP analogs bind with relatively high affinity to the NPFF1 and NPFF2 receptors (NPFF-R). RFRP-1 has potent activity for NPFF1. Significant expression of NPFF1 was detected in the CeA. To evaluate the role of RFRP-1 in feeding regulation rats were microinjected with different doses of RFRP-1 and their food intake were quantified over a 60min period. Liquid food intake of male Wistar rats was measured after bilateral intraamygdaloid administration of RFRP-1 (25, 50 or 100ng/side, RFRP-1 dissolved in 0.15M sterile NaCl/0.4μl, respectively). The 50ng dose of RFRP-1 microinjections resulted in significant decrease of food intake. The 25 and 100ng had no effect. Action of 50ng (37.8pmol) RFRP-1 was eliminated by 20ng (41.4pmol) RF9 NPFF-R antagonist pretreatment. In open-field test 50ng RFRP-1 did not modify spontaneous locomotor activity and general behavior of animals did not change. Our results are the first reporting that RFRP-1 injected to the CeA result in a decrease of liquid food consumption. This is a receptor-linked effect because it was eliminated by a NPFF-R selective antagonist.
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Affiliation(s)
- Anita Kovács
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
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29
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László K, Tóth K, Kertes E, Péczely L, Ollmann T, Madarassy-Szücs A, Lénárd L. The role of neurotensin in passive avoidance learning in the rat central nucleus of amygdala. Behav Brain Res 2011; 226:597-600. [PMID: 21946307 DOI: 10.1016/j.bbr.2011.08.041] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 08/23/2011] [Accepted: 08/27/2011] [Indexed: 11/30/2022]
Abstract
Tridecapeptide neurotensin (NT) acts as a neurotransmitter and/or neuromodulator and plays a role in learning and reinforcement. The central nucleus of amygdala (CeA), which is relatively rich in NT and neurotensin-1 receptors (NTS1), participates in the regulation of memory and learning mechanisms. The aim of this study was to examine the possible effect of NT and NTS1 antagonist (ANT) on passive avoidance learning after their microinjection into the CeA of male wistar rats. NT significantly increased the latency time. Effect of NT was blocked by ANT pretreatment. ANT in itself had no effect. Our results show that in the rat CeA NT facilitates passive avoidance learning via NTS1.
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Affiliation(s)
- Kristóf László
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
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30
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Kertes E, László K, Berta B, Lénárd L. Positive reinforcing effects of substance P in the rat globus pallidus revealed by conditioned place preference. Behav Brain Res 2010; 215:152-5. [DOI: 10.1016/j.bbr.2010.06.027] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2010] [Accepted: 06/21/2010] [Indexed: 11/26/2022]
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31
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László K, Tóth K, Kertes E, Péczely L, Lénárd L. The role of neurotensin in positive reinforcement in the rat central nucleus of amygdala. Behav Brain Res 2009; 208:430-5. [PMID: 20035801 DOI: 10.1016/j.bbr.2009.12.022] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2009] [Revised: 12/10/2009] [Accepted: 12/12/2009] [Indexed: 10/20/2022]
Abstract
In the central nervous system neurotensin (NT) acts as a neurotransmitter and neuromodulator. It was shown that NT has positive reinforcing effects after its direct microinjection into the ventral tegmental area. The central nucleus of amygdala (CeA), part of the limbic system, plays an important role in learning, memory, regulation of feeding, anxiety and emotional behavior. By means of immunohistochemical and radioimmune methods it was shown that the amygdaloid body is relatively rich in NT immunoreactive elements and NT receptors. The aim of our study was to examine the possible effects of NT on reinforcement and anxiety in the CeA. In conditioned place preference test male Wistar rats were microinjected bilaterally with 100 or 250 ng NT in volume of 0.4 microl or 35 ng neurotensin receptor 1 (NTS1) antagonist SR 48692 alone, or NTS1 antagonist 15 min before 100 ng NT treatment. Hundred or 250 ng NT significantly increased the time rats spent in the treatment quadrant. Prior treatment with the non-peptide NTS1 antagonist blocked the effects of NT. Antagonist itself did not influence the reinforcing effect. In elevated plus maze test we did not find differences among the groups as far as the anxiety index (time spent on the open arms) was concerned. Our results suggest that in the rat ACE NT has positive reinforcing effects. We clarified that NTS1s are involved in this action. It was also shown that NT does not influence anxiety behavior.
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Affiliation(s)
- Kristóf László
- Institute of Physiology, Pécs University Medical School, Pécs, Hungary
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32
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Kertes E, László K, Berta B, Lénárd L. Positive reinforcing effects of substance P in the rat central nucleus of amygdala. Behav Brain Res 2009; 205:307-10. [DOI: 10.1016/j.bbr.2009.06.028] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2009] [Revised: 06/15/2009] [Accepted: 06/17/2009] [Indexed: 10/20/2022]
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33
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Tóth K, László K, Lukács E, Lénárd L. Intraamygdaloid microinjection of acylated-ghrelin influences passive avoidance learning. Behav Brain Res 2009; 202:308-11. [DOI: 10.1016/j.bbr.2009.03.031] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2009] [Revised: 03/17/2009] [Accepted: 03/20/2009] [Indexed: 10/21/2022]
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34
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Tóth B, László K, Horvai G. Chromatographic behavior of silica–polymer composite molecularly imprinted materials. J Chromatogr A 2005; 1100:60-7. [PMID: 16188268 DOI: 10.1016/j.chroma.2005.09.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2005] [Revised: 09/06/2005] [Accepted: 09/09/2005] [Indexed: 11/29/2022]
Abstract
Molecularly imprinted polymers (MIP) have recently been prepared inside the pores of silica based HPLC packing materials. Detailed physical and chromatographic characterization of such a silica-MIP composite material is presented. The chromatographic peak shape obtained with the uniformly sized spherical silica-MIP composite is mainly determined by the nonlinear adsorption isotherm. Comparison of the composite with the conventional sieved and grinded bulk MIP is therefore based on the nonlinear isotherm and not on retention factors and plate numbers.
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Affiliation(s)
- B Tóth
- Department of Chemical Information Technology, Budapest University of Technology and Economics, Szt. Gellért tér 4, Hungary
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35
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Simon L, Kotormán M, Maráczi K, László K. N-acetyl-l-arginine ethyl ester synthesis catalysed by bovine trypsin in organic media. ACTA ACUST UNITED AC 2000. [DOI: 10.1016/s1381-1177(00)00098-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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36
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Simon LM, László K, Kotormán M, Vértesi A, Bagi K, Nemcsók J. Effects of synthetic pyrethroids and methidation on activities of some digestive enzymes in carp (Cyprinus carpio L.). J Environ Sci Health B 1999; 34:819-828. [PMID: 10466103 DOI: 10.1080/03601239909373228] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/23/2023]
Abstract
The effects of pyrethroid pesticides (deltamethrin, permethrin and cypermethrin) and an organophosphate ester (methidation) on the activities of carp trypsin, alpha-chymotrypsin, carboxypeptidase A and lipase were studied. The enzymes were isolated from the gastrointestinal tract and the effects of the pesticides were investigated during incubation for 5 min. The activity of trypsin was influenced only slightly by the presence of deltamethrin and methidation, whereas permethrin and cypermethrin caused significant inhibition. The pyrethroid pesticides at lower concentrations resulted in a slight activation of alpha-chymotrypsin. Methidation inhibited the alpha-chymotrypsin activity by about 20%. These pesticides modified the lipase activity to a lesser extent; the highest inhibition was measured with cypermethrin. The carboxypeptidase A activity was inhibited by both pyrethroid pesticides and methidation. The results suggest that these pesticides might interact with the active conformation of the studied hydrolytic enzymes, resulting in changes in their activities.
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Affiliation(s)
- L M Simon
- Department of Biochemistry, József Attila University, Szeged, Hungary
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37
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László K, Bóta A, Nagy L, Subklew G, Schwuger M. Fractal approach of activated carbons from solid waste materials. Colloids Surf A Physicochem Eng Asp 1998. [DOI: 10.1016/s0927-7757(98)00227-1] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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László K. [The first heart suturing was performed in 1896, not 1897]. Orv Hetil 1996; 137:1669-70. [PMID: 9019708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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40
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Nagy L, László K, Fóti G, Schay G. Investigation of high-performance liquid chromatographic packings by liquid mixture adsorption. J Chromatogr A 1987. [DOI: 10.1016/s0021-9673(00)94038-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Abstract
In the anesthetized dog renal blood flow (RBF) and its intrarenal distribution were investigated by the radioactive microsphere technique 24 hr after bilateral (BUL) and unilateral (UUL) ureteral ligation. In the control series indomethacin (IM) led to a decrease in RBF with outward shifting of zonal perfusions; imidazole (IA) did not cause significant changes in renal hemodynamics. In the BUL series there was a sharp drop in RBF with a proportional decrease in outer (OC) and inner (IC) cortical perfusion; IM treatment resulted in a further decrease in overall and zonal perfusions. IA, a selective inhibitor of thromboxane synthetase, relieved IC vasoconstriction. In the ligated kidney of the UUL preparations decrease in RBF was due to OC vasoconstriction, while IC perfusion equalled controls. IM led to an overall vasoconstriction in all cortical layers; IA did not influence either total RBF or its distribution. It was concluded that BUL "unmasked" TXA2 production in the IC layers, while IM treatment, by inhibiting the production of PGE2, PGI2, and TXA2, resulted in an overall vasoconstriction both in controls and the BUL and UUL preparations.
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László K, Juszkó J, Bálint P. Reliability of the measurement of intrarenal haemodynamics in the dog, as determined by the radioactive microsphere technique. Int Urol Nephrol 1981; 13:207-20. [PMID: 7327896 DOI: 10.1007/bf02082418] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
In the anaesthetized dog total renal blood flow (RBF) and its intrarenal distribution were investigated by the radioactive microsphere technique under control conditions and after various experimental interventions. (i) In five control series performed within the last four years, there was a small but significant scatter in total RBF, due entirely to changes in inner cortical (IC) perfusion, while outer cortical (OC) perfusion proved to be constant. (ii) Repeated measurements in the same dog, performed after 1 h interval revealed constancy of total RBF with some inward shifting in cortical perfusion. (iii) Surgical intervention or manipulation of the kidney did not alter total RBF but led to an increase in IC, compensated by a decrease in OC perfusion (iv) The possible role of local intrarenal hormones (angiotensin and prostaglandin) in the above changes is discussed.
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László K. [Clinical significance of cyclic nucleotid systems]. Orv Hetil 1977; 118:1835-7. [PMID: 196241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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44
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Agnes S, László K, Gyula E. [Clinical control of crowns and bridges cast of silver-palladium alloy]. Fogorv Sz 1977; 70:129-33. [PMID: 324826] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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45
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András J, László K, Károly L. [Drug combinations and the basic principles of their composition in cancer chemotherapy]. Orv Hetil 1977; 118:259-62. [PMID: 319400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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46
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Gyula J, János S, László K, József B. [Axillo-femoral bypass surgery in the correction of severe arterial circulatory disorder of the lower extremities]. Orv Hetil 1976; 117:3108-11. [PMID: 1004878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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47
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Elemér K, László K, Erzsébet P, Ibolya N, Kálmán M. [IgD myeloma]. Orv Hetil 1976; 117:2675-7. [PMID: 980490] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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48
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Tamás K, Gabriella K, Ildikó P, László K. [In vitro activity of HL-A antigens and lymphocytes in choriocarcinoma and hydatidiform mole pregnancy]. Orv Hetil 1976; 117:2478-80. [PMID: 135239] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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49
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Gyula S, László K, Erzsébet N. [Neonatal histidinemia, detected by screening test]. Orv Hetil 1976; 117:1943-5. [PMID: 958698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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50
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Bálint P, László K, Taraba I, Szalay S. Renal function following branch-artery ligation in the canine kidney. Res Exp Med (Berl) 1975; 166:53-66. [PMID: 1202589 DOI: 10.1007/bf01851346] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Viable kidney mass has been reduced in dogs by branch-artery ligation combined with uninephrectomy. 1. When viable kidney remnants amount to about 1/4 of the original kidney mass dogs survive in apparent good health with moderate azotaemia; with 1/8 to 1/10 kidney remnants azotaemia is progressive and uraemic death supervenes within some days. 2. Reduction of renal blood flow and of glomerular filtration rate to about one-fourth of their respective control values seems to be compatible with survival; with further reduction death ensues. An inverse and linear relationship between NPN and GFR on a log-log basis has been found. 3. Mean nephron blood flow is equally enhanced in both the more and the less severely infarcted kidneys. On the other hand, mean nephron glomerular filtration is increased when about one half of the kidney is viable, but decreased with more extensive infarction. 4. Mean nephron vascular resistance is diminished; considering the pronounced decrease in Ein, i.e. filtration fraction, predominance of postglomerular vasodilatation is assumed. The formation of non-filtering, actively perfused nephrons is taken into consideration.
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