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Moraes MA, Árabe LB, Resende BL, Codo BC, Reis ALDAL, Souza BR. Effects of L-Dopa, SKF-38393, and quinpirole on exploratory, anxiety- and depressive-like behaviors in pubertal female and male mice. Behav Brain Res 2024; 459:114805. [PMID: 38096922 DOI: 10.1016/j.bbr.2023.114805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 12/06/2023] [Accepted: 12/06/2023] [Indexed: 12/17/2023]
Abstract
Adolescence is a phase of substantial changes in the brain, characterized by maturational remodeling of many systems. This remodeling allows functional plasticity to adapt to a changing environment. The dopaminergic system is under morphological and physiological changes during this phase. In the present study, we investigated if changes in the dopaminergic tone alter mice behavior in a receptor and sex-specific manner, specifically at the beginning of the puberty period. We administered L-Dopa, SKF-38393 (D1 dopamine receptor agonist), and Quinpirole (D2 dopamine receptor agonist) and tested male and female mice's motor, anxiety- and depressive-like behavior. While females displayed an impaired exploratory drive, males presented an intense depressive-like response. Our results provide insights into the function of dopaminergic development in adolescent behavior and highlight the importance of studies in this time window with male and female subjects.
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Affiliation(s)
- Muiara Aparecida Moraes
- Laboratório de Neurodesenvolvimento e Evolução - Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Laila Blanc Árabe
- Laboratório de Neurodesenvolvimento e Evolução - Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Bruna Lopes Resende
- Laboratório de Neurodesenvolvimento e Evolução - Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Beatriz Campos Codo
- Laboratório de Neurodesenvolvimento e Evolução - Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Ana Luiza de Araújo Lima Reis
- Laboratório de Neurodesenvolvimento e Evolução - Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG 31270-901, Brazil
| | - Bruno Rezende Souza
- Laboratório de Neurodesenvolvimento e Evolução - Department of Physiology and Biophysics, Federal University of Minas Gerais, Belo Horizonte, MG 31270-901, Brazil.
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Nikolaus S, Chao OY, Beu M, Henke J, Antke C, Wang AL, Fazari B, Mamlins E, Huston JP, Giesel FL. The 5-HT 1A receptor agonist 8-OH-DPAT modulates motor/exploratory activity, recognition memory and dopamine transporter binding in the dorsal and ventral striatum. Neurobiol Learn Mem 2023; 205:107848. [PMID: 37865262 DOI: 10.1016/j.nlm.2023.107848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2023] [Revised: 10/09/2023] [Accepted: 10/18/2023] [Indexed: 10/23/2023]
Abstract
In the present studies, we assessed the effect of the 5-HT1A receptor (R) agonist 8-hydroxy-2-(di-n-propylamino)tetralin (8-OH-DPAT) on motor and exploratory behaviors, object and place recognition and dopamine transporter (DAT) and serotonin transporter (SERT) binding in the rat brain. In Experiment I, motor/exploratory behaviors were assessed in an open field after injection of either 8-OH-DPAT (0.1 and 3 mg/kg) or vehicle for 30 min without previous habituation to the open field. In Experiment II, rats underwent a 5-min exploration trial in an open field with two identical objects. After injection of either 8-OH-DPAT (0.1 and 3 mg/kg) or vehicle, rats underwent a 5-min test trial with one of the objects replaced by a novel one and the other object transferred to a novel place. Subsequently, N-o-fluoropropyl-2b-carbomethoxy-3b-(4-[123I]iodophenyl)-nortropane ([123I]FP-CIT; 11 ± 4 MBq) was injected into the tail vein. Regional radioactivity accumulations were determined post mortem with a well counter. In both experiments, 8-OH-DPAT dose-dependently increased ambulation and exploratory head-shoulder motility, whereas rearing was dose-dependently decreased. In the test rial of Experiment II, there were no effects of 8-OH-DPAT on overall activity, sitting and grooming. 8-OH-DPAT dose-dependently impaired recognition of object and place. 8-OH-DPAT (3 mg/kg) increased DAT binding in the dorsal striatum relative to both vehicle and 0.1 mg/kg 8-OH-DPAT. Furthermore, in the ventral striatum, DAT binding was decreased after 3 mg/kg 8-OH-DPAT relative to vehicle. Findings indicate that motor/exploratory behaviors, memory for object and place and regional dopamine function may be modulated by the 5-HT1AR. Since, after 8-OH-DPAT, rats exhibited more horizontal and less (exploratory) vertical motor activity, while overall activity was not different between groups, it may be inferred, that the observed impairment of object recognition was not related to a decrease of motor activity as such, but to a decrease of intrinsic motivation, attention and/or awareness, which are relevant accessories of learning. Furthermore, the present findings on 8-OH-DPAT action indicate associations not only between motor/exploratory behavior and the recognition of object and place but also between the respective parameters and the levels of available DA in dorsal and ventral striatum.
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Affiliation(s)
- Susanne Nikolaus
- Department of Nuclear Medicine, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine University, Moorenstr. 5, D-40225 Düsseldorf, Germany.
| | - Owen Y Chao
- Department of Biomedical Sciences, University of Minnesota Medical School, Duluth, MN 55812, USA
| | - Markus Beu
- Department of Nuclear Medicine, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine University, Moorenstr. 5, D-40225 Düsseldorf, Germany
| | - Jan Henke
- Department of Nuclear Medicine, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine University, Moorenstr. 5, D-40225 Düsseldorf, Germany
| | - Christina Antke
- Department of Nuclear Medicine, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine University, Moorenstr. 5, D-40225 Düsseldorf, Germany
| | - An-Li Wang
- Department of Pharmacology and Toxicology, Jacob School of Medicine and Biomedical Sciences, University at Buffalo, 1021 Main Street, Buffalo, NY 14203, USA
| | - Benedetta Fazari
- Institute of Anatomy II, Medical Faculty and University Hospital Düsseldorf, Heinrich Heine University, Universitätsstr. 1, D-40225 Düsseldorf, Germany
| | - Eduards Mamlins
- Department of Nuclear Medicine, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine University, Moorenstr. 5, D-40225 Düsseldorf, Germany
| | - Joseph P Huston
- Center for Behavioural Neuroscience, Institute of Experimental Psychology, Heinrich-Heine University, Universitätsstr. 1, D-40225 Düsseldorf, Germany
| | - Frederik L Giesel
- Department of Nuclear Medicine, Medical Faculty and University Hospital Düsseldorf, Heinrich-Heine University, Moorenstr. 5, D-40225 Düsseldorf, Germany
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Nikolaus S, Wittsack HJ, Beu M, Hautzel H, Antke C, Mamlins E, Cardinale J, Decheva C, Huston JP, Antoch G, Giesel FL, Müller HW. The 5-HT1A receptor antagonist WAY-100635 decreases motor/exploratory behaviors and nigrostriatal and mesolimbocortical dopamine D2/3 receptor binding in adult rats. Pharmacol Biochem Behav 2022; 215:173363. [DOI: 10.1016/j.pbb.2022.173363] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Revised: 02/22/2022] [Accepted: 02/22/2022] [Indexed: 10/19/2022]
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Nikolaus S, Wittsack HJ, Antke C, Beu M, Hautzel H, Decheva C, Mamlins E, Mori Y, Huston JP, Antoch G, Müller HW. Serotonergic Modulation of Nigrostriatal and Mesolimbic Dopamine and Motor/Exploratory Behaviors in the Rat. Front Neurosci 2021; 15:682398. [PMID: 34456668 PMCID: PMC8387951 DOI: 10.3389/fnins.2021.682398] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 07/12/2021] [Indexed: 11/23/2022] Open
Abstract
Purpose: The 5-HT2A receptor (R) is known to modulate dopamine (DA) release in the mammalian brain. Altanserin (ALT) and 2,5-dimethoxy-4-iodoamphetamine (DOI) act as 5-HT2AR antagonist and agonist, respectively. In the present study, we assessed the effects of ALT and DOI on motor and exploratory behaviors and on D2/3R binding in the rat brain with in vivo imaging methods. Methods: D2/3R binding was determined after systemic application of ALT (10 mg/kg) or DOI (0.5 mg/kg) and the respective vehicles [dimethyl sulfoxide (DMSO) and 0.9% saline (SAL)] with [123I]IBZM as a single-photon emission computed tomography (SPECT) radioligand. Anatomical information for the delineation of the target regions was obtained with dedicated small animal MRI. Immediately after 5-HT2AR antagonistic or agonistic treatment, motor/exploratory behaviors were assessed for 45 (ALT) or 30 min (DOI) in an open field. Additional rats underwent behavioral measurements after injection of DMSO or SAL. Results: ALT increased D2/3R binding in the ventral hippocampus relative to vehicle, while DOI augmented D2/3R binding in caudate putamen, frontal cortex, motor cortex, and ventral hippocampus. The 5-HT2AR agonist as well as antagonist decreased parameters of motor activity and active exploration. However, ALT, in contrast to DOI, decreased explorative head–shoulder motility and increased sitting. Conclusions: The regional increases of D2/3R binding after ALT and DOI (90 and 75 min post-challenge) may be conceived to reflect decreases of synaptic DA. The reductions of motor/exploratory activities (min 1–45 and min 1–30 after challenge with ALT and DOI, respectively) contrast the regional reductions of D2/3R binding, as they indicate elevated DA levels at the time of behavioral measurements. It may be concluded that ALT and DOI modulate DA in the individual regions of the nigrostriatal and mesolimbocortical pathways differentially and in a time-dependent fashion.
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Affiliation(s)
- Susanne Nikolaus
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Hans-Jörg Wittsack
- Department of Diagnostic and Interventional Radiology, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Christina Antke
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Markus Beu
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Hubertus Hautzel
- Clinic for Nuclear Medicine, University Hospital Essen, Essen, Germany
| | - Cvetana Decheva
- Center for Behavioural Neuroscience, Institute of Experimental Psychology, Heinrich-Heine University, Düsseldorf, Germany
| | - Eduards Mamlins
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Yuriko Mori
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Joseph P Huston
- Center for Behavioural Neuroscience, Institute of Experimental Psychology, Heinrich-Heine University, Düsseldorf, Germany
| | - Gerald Antoch
- Department of Diagnostic and Interventional Radiology, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Hans-Wilhelm Müller
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Düsseldorf, Germany
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Repeatability analysis improves the reliability of behavioral data. PLoS One 2020; 15:e0230900. [PMID: 32240211 PMCID: PMC7117744 DOI: 10.1371/journal.pone.0230900] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Accepted: 03/11/2020] [Indexed: 11/19/2022] Open
Abstract
Reliability of data has become a major concern in the course of the reproducibility crisis. Especially when studying animal behavior, confounding factors such as novelty of the test apparatus can lead to a wide variability of data which may mask treatment effects and consequently lead to misinterpretation. Habituation to the test situation is a common practice to circumvent novelty induced increases in variance and to improve the reliability of the respective measurements. However, there is a lack of published empirical knowledge regarding reasonable habituation procedures and a method validation seems to be overdue. This study aimed at setting up a simple strategy to increase reliability of behavioral data measured in a familiar test apparatus. Therefore, exemplary data from mice tested in an Open Field (OF) arena were used to elucidate the potential of habituation and how reliability of measures can be confirmed by means of a repeatability analysis using the software R. On seven consecutive days, male C57BL/6J, BALB/cJ and 129S1/SvImJ mice were tested in an OF arena once daily and individual mouse behavior was recorded. A repeatability analysis was conducted with regard to repeated trials of habituation. Our data analysis revealed that monitoring animal behavior during habituation is important to determine when individual differences of the measurements are stable. Repeatability values from distance travelled and average activity increased over the habituation period, revealing that around 60% of the variance of the data can be explained by individual differences between mice. The first day of habituation was significantly different from the following 6 days. A three-day habituation period appeared to be sufficient in this study. Overall, these results emphasize the importance of habituation and in depth analysis of habituation data to define the correct starting point of the experiment for improving the reliability and reproducibility of experimental data.
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Nikolaus S, Wittsack HJ, Wickrath F, Müller-Lutz A, Hautzel H, Beu M, Antke C, Mamlins E, De Souza Silva MA, Huston JP, Antoch G, Müller HW. Differential effects of D-cycloserine and amantadine on motor behavior and D 2/3 receptor binding in the nigrostriatal and mesolimbic system of the adult rat. Sci Rep 2019; 9:16128. [PMID: 31695055 PMCID: PMC6834679 DOI: 10.1038/s41598-019-52185-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 10/14/2019] [Indexed: 01/16/2023] Open
Abstract
D-cycloserine (DCS) and amantadine (AMA) act as partial NMDA receptor (R) agonist and antagonist, respectively. In the present study, we compared the effects of DCS and AMA on dopamine D2/3R binding in the brain of adult rats in relation to motor behavior. D2/3R binding was determined with small animal SPECT in baseline and after challenge with DCS (20 mg/kg) or AMA (40 mg/kg) with [123I]IBZM as radioligand. Immediately post-challenge, motor/exploratory behavior was assessed for 30 min in an open field. The regional binding potentials (ratios of the specifically bound compartments to the cerebellar reference region) were computed in baseline and post-challenge. DCS increased D2/3R binding in nucleus accumbens, substantia nigra/ventral tegmental area, thalamus, frontal, motor and parietal cortex as well as anterodorsal and posterior hippocampus, whereas AMA decreased D2/3R binding in nucleus accumbens, caudateputamen and thalamus. After DCS, ambulation and head-shoulder motility were decreased, while sitting was increased compared to vehicle and AMA. Moreover, DCS increased rearing relative to AMA. The regional elevations of D2/3R binding after DCS reflect a reduction of available dopamine throughout the mesolimbocortical system. In contrast, the reductions of D2/3R binding after AMA indicate increased dopamine in nucleus accumbens, caudateputamen and thalamus. Findings imply that, after DCS, nigrostriatal and mesolimbic dopamine levels are directly related to motor/exploratory activity, whereas an inverse relationship may be inferred for AMA.
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Affiliation(s)
- Susanne Nikolaus
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Heinrich Heine University, Moorenstr. 5, D-40225, Düsseldorf, Germany.
| | - Hans-Jörg Wittsack
- Department of Diagnostic and Interventional Radiology, University Hospital Düsseldorf, Heinrich Heine University, Moorenstr. 5, D-40225, Düsseldorf, Germany
| | - Frithjof Wickrath
- Institute for Clinical Diabetology, German Diabetes Center (DDZ), Heinrich-Heine University, Auf´m Hennekamp 65, 40225, Düsseldorf, Germany
| | - Anja Müller-Lutz
- Department of Diagnostic and Interventional Radiology, University Hospital Düsseldorf, Heinrich Heine University, Moorenstr. 5, D-40225, Düsseldorf, Germany
| | - Hubertus Hautzel
- Clinic for Nuclear Medicine, University Hospital Essen, Hufelandstraße 55, D-45122, Essen, Germany
| | - Markus Beu
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Heinrich Heine University, Moorenstr. 5, D-40225, Düsseldorf, Germany
| | - Christina Antke
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Heinrich Heine University, Moorenstr. 5, D-40225, Düsseldorf, Germany
| | - Eduards Mamlins
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Heinrich Heine University, Moorenstr. 5, D-40225, Düsseldorf, Germany
| | - Maria Angelica De Souza Silva
- Center for Behavioural Neuroscience, Institute of Experimental Psychology, Heinrich-Heine University, Universitätsstr. 1, D-40225, Düsseldorf, Germany
| | - Joseph P Huston
- Center for Behavioural Neuroscience, Institute of Experimental Psychology, Heinrich-Heine University, Universitätsstr. 1, D-40225, Düsseldorf, Germany
| | - Gerald Antoch
- Department of Diagnostic and Interventional Radiology, University Hospital Düsseldorf, Heinrich Heine University, Moorenstr. 5, D-40225, Düsseldorf, Germany
| | - Hans-Wilhelm Müller
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Heinrich Heine University, Moorenstr. 5, D-40225, Düsseldorf, Germany
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Amantadine enhances nigrostriatal and mesolimbic dopamine function in the rat brain in relation to motor and exploratory activity. Pharmacol Biochem Behav 2019; 179:156-170. [DOI: 10.1016/j.pbb.2018.12.010] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 12/11/2018] [Accepted: 12/27/2018] [Indexed: 01/01/2023]
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Cannizzaro C, Talani G, Brancato A, Mulas G, Spiga S, De Luca MA, Sanna A, Marino RAM, Biggio G, Sanna E, Diana M. Dopamine Restores Limbic Memory Loss, Dendritic Spine Structure, and NMDAR-Dependent LTD in the Nucleus Accumbens of Alcohol-Withdrawn Rats. J Neurosci 2019; 39:929-943. [PMID: 30446531 PMCID: PMC6382989 DOI: 10.1523/jneurosci.1377-18.2018] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 09/28/2018] [Accepted: 10/15/2018] [Indexed: 02/06/2023] Open
Abstract
Alcohol abuse leads to aberrant forms of emotionally salient memory, i.e., limbic memory, that promote escalated alcohol consumption and relapse. Accordingly, activity-dependent structural abnormalities are likely to contribute to synaptic dysfunctions that occur from suddenly ceasing chronic alcohol consumption. Here we show that alcohol-dependent male rats fail to perform an emotional-learning task during abstinence but recover their functioning by l-3,4-dihydroxyphenylalanin (l-DOPA) administration during early withdrawal. l-DOPA also reverses the selective loss of dendritic "long thin" spines observed in medium spiny neurons of the nucleus accumbens (NAc) shell of alcohol-dependent rats during abstinence, as well as the reduction in tyrosine hydroxylase immunostaining and postsynaptic density-95-positive elements. Patch-clamp experiments in NAc slices reveal that both in vivo systemic l-DOPA administration and in vitro exposure to dopamine can restore the loss of long-term depression (LTD) formation, counteract the reduction in NMDAR-mediated synaptic currents and rectify the altered NMDAR/AMPAR ratio observed in alcohol-withdrawn rats. Further, in vivo microdialysis experiments show that blunted dopaminergic signaling is revived after l-DOPA treatment during early withdrawal. These results suggest a key role of an efficient dopamine signaling for maintaining, and restore, neural trophism, NMDA-dependent LTD, and ultimately optimal learning.SIGNIFICANCE STATEMENT Blunted dopamine signaling and altered glutamate connectivity in the nucleus accumbens represent the neuroanatomical basis for the impairment in aversive limbic memory observed during withdrawal in alcohol dependence. Supplying l-DOPA during withdrawal re-establishes synaptic morphology and functional neuroadaptations, suggesting a complete recovery of nucleus accumbens glutamatergic synaptic plasticity when dopamine is revived. Importantly, restoring dopamine transmission allows those synapses to encode emotionally relevant information and rescue flexibility in the neuronal circuits that process limbic memory formation. Under these conditions, drugs capable of selectively boosting the dopaminergic function during the "fluid" and still responsive state of the early withdrawn maladaptive synapses may help in the treatment of alcohol addiction.
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Affiliation(s)
- Carla Cannizzaro
- Laboratory of Neuropsychopharmacology, Department ProSaMI G. D'Alessandro, University of Palermo, Via del Vespro 129 90127, Palermo, Italy
| | - Giuseppe Talani
- Institute of Neuroscience, National Research Council, 09042 Monserrato, Cagliari, Italy
| | - Anna Brancato
- Laboratory of Neuropsychopharmacology, Department ProSaMI G. D'Alessandro, University of Palermo, Via del Vespro 129 90127, Palermo, Italy
| | - Giovanna Mulas
- Department of Life and Environmental Sciences, Section of Neuroscience and Anthropology, University of Cagliari, 09042 Monserrato, Cagliari, Italy
| | - Saturnino Spiga
- Department of Life and Environmental Sciences, Section of Neuroscience and Anthropology, University of Cagliari, 09042 Monserrato, Cagliari, Italy
| | - Maria Antonietta De Luca
- Department of Biomedical Sciences, Section of Neuropsychopharmacology, University of Cagliari, Cittadella Universitaria-S.P., 09042 Monserrato, Cagliari, Italy
| | - Angela Sanna
- Department of Medical Science and Public Health, University of Cagliari, Cittadella Universitaria-S.P., 09042 Monserrato, Cagliari, Italy
| | - Rosa Anna Maria Marino
- Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Baltimore, Maryland 21224, and
| | - Giovanni Biggio
- Institute of Neuroscience, National Research Council, 09042 Monserrato, Cagliari, Italy
- Department of Life and Environmental Sciences, Section of Neuroscience and Anthropology, University of Cagliari, 09042 Monserrato, Cagliari, Italy
| | - Enrico Sanna
- Institute of Neuroscience, National Research Council, 09042 Monserrato, Cagliari, Italy
- Department of Life and Environmental Sciences, Section of Neuroscience and Anthropology, University of Cagliari, 09042 Monserrato, Cagliari, Italy
| | - Marco Diana
- University of Sassari, G.Minardi Laboratory of Cognitive Neuroscience, Department of Chemistry and Pharmacy Via Muroni, 23 07100 Sassari, Italy
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Nikolaus S, Wittsack HJ, Beu M, Antke C, De Souza Silva MA, Wickrath F, Müller-Lutz A, Huston JP, Antoch G, Müller HW, Hautzel H. GABAergic Control of Nigrostriatal and Mesolimbic Dopamine in the Rat Brain. Front Behav Neurosci 2018; 12:38. [PMID: 29593508 PMCID: PMC5862131 DOI: 10.3389/fnbeh.2018.00038] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2017] [Accepted: 02/20/2018] [Indexed: 12/21/2022] Open
Abstract
Purpose: The present study assessed the effects of the GABAA receptor (R) agonist muscimol (MUS), and the GABAAR antagonist bicuculline (BIC) on neocortical and subcortical radioligand binding to dopamine D2/3Rs in relation to motor and exploratory behaviors in the rat. Methods: D2/3R binding was measured with small animal SPECT in baseline and after challenge with either 1 mg/kg MUS or 1 mg/kg BIC, using [123I]IBZM as radioligand. Motor/exploratory behaviors were assessed for 30 min in an open field prior to radioligand administration. Anatomical information was gained with a dedicated small animal MRI tomograph. Based on the Paxinos rat brain atlas, regions of interest were defined on SPECT-MRI overlays. Estimations of the binding potentials in baseline and after challenges were obtained by computing ratios of the specifically bound compartments to the cerebellar reference region. Results: After MUS, D2/3R binding was significantly reduced in caudateputamen, nucleus accumbens, thalamus, substania nigra/ventral tegmental area, and posterior hippocampus relative to baseline (0.005 ≤ p ≤ 0.012). In all these areas, except for the thalamus, D2/3R binding was negatively correlated with grooming in the first half and positively correlated with various motor/exploratory behaviors in the second half of the testing session. After BIC, D2/3R binding was significantly elevated in caudateputamen (p = 0.022) and thalamus (p = 0.047) relative to baseline. D2/3R binding in caudateputamen and thalamus was correlated negatively with sitting duration and sitting frequency and positively with motor/exploratory behaviors in the first half of the testing time. Conclusions: Findings indicate direct GABAergic control over nigrostriatal and mesolimbic dopamine levels in relation to behavioral action. This may be of relevance for neuropsychiatric conditions such as anxiety disorder and schizophrenia, which are characterized by both dopaminergic and GABAergic dysfunction.
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Affiliation(s)
- Susanne Nikolaus
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Hans-Jörg Wittsack
- Department of Diagnostic and Interventional Radiology, Medical Faculty, University Düsseldorf, Düsseldorf, Germany
| | - Markus Beu
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Christina Antke
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Maria A De Souza Silva
- Center for Behavioural Neuroscience, Institute of Experimental Psychology, Heinrich-Heine University, Düsseldorf, Germany
| | - Frijthof Wickrath
- Department of Diagnostic and Interventional Radiology, Medical Faculty, University Düsseldorf, Düsseldorf, Germany
| | - Anja Müller-Lutz
- Department of Diagnostic and Interventional Radiology, Medical Faculty, University Düsseldorf, Düsseldorf, Germany
| | - Joseph P Huston
- Center for Behavioural Neuroscience, Institute of Experimental Psychology, Heinrich-Heine University, Düsseldorf, Germany
| | - Gerald Antoch
- Department of Diagnostic and Interventional Radiology, Medical Faculty, University Düsseldorf, Düsseldorf, Germany
| | - Hans-Wilhelm Müller
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Düsseldorf, Germany
| | - Hubertus Hautzel
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Düsseldorf, Germany
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Lai Y, Cheng Y, Hsieh K, Nguyen D, Chew K, Ramanathan L, Siegel JM. Motor hyperactivity of the iron-deficient rat - an animal model of restless legs syndrome. Mov Disord 2017; 32:1687-1693. [PMID: 28843017 PMCID: PMC5759344 DOI: 10.1002/mds.27133] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2017] [Revised: 07/13/2017] [Accepted: 07/16/2017] [Indexed: 02/06/2023] Open
Abstract
Background Abnormal striatal dopamine transmission has been hypothesized to cause restless legs syndrome. Dopaminergic drugs are commonly used to treat restless legs syndrome. However, they cause adverse effects with long‐term use. An animal model would allow the systematic testing of potential therapeutic drugs. A high prevalence of restless legs syndrome has been reported in iron‐deficient anemic patients. We hypothesized that the iron‐deficient animal would exhibit signs similar to those in restless legs syndrome patients. Methods After baseline polysomnographic recordings, iron‐deficient rats received pramipexole injection. Then, iron‐deficient rats were fed a standard rodent diet, and polysomnographic recording were performed for 2 days each week for 4 weeks. Results Iron‐deficient rats have low hematocrit levels and show signs of restless legs syndrome: sleep fragmentation and periodic leg movements in wake and in slow‐wave sleep. Iron‐deficient rats had a positive response to pramipexole treatment. After the iron‐deficient rats were fed the standard rodent diet, hematocrit returned to normal levels, and sleep quality improved, with increased average duration of wake and slow‐wave sleep episodes. Periodic leg movements decreased during both waking and sleep. Hematocrit levels positively correlated with the average duration of episodes in wake and in slow‐wave sleep and negatively correlated with periodic leg movements in wake and in sleep. Western blot analysis showed that striatal dopamine transporter levels were higher in iron‐deficient rats. Conclusions The iron‐deficient rat is a useful animal model of iron‐deficient anemic restless legs syndrome. © 2017 The Authors. Movement Disorders published by Wiley Periodicals, Inc. on behalf of International Parkinson and Movement Disorder Society
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Affiliation(s)
- Yuan‐Yang Lai
- Department of Psychiatry and Biobehavioral SciencesUniversity of California, Los AngelesLos AngelesCaliforniaUSA
| | - Yu‐Hsuan Cheng
- Department of Psychiatry and Biobehavioral SciencesUniversity of California, Los AngelesLos AngelesCaliforniaUSA
| | - Kung‐Chiao Hsieh
- Department of Psychiatry and Biobehavioral SciencesUniversity of California, Los AngelesLos AngelesCaliforniaUSA
| | - Darian Nguyen
- Department of Psychiatry and Biobehavioral SciencesUniversity of California, Los AngelesLos AngelesCaliforniaUSA
| | - Keng‐Tee Chew
- Department of Psychiatry and Biobehavioral SciencesUniversity of California, Los AngelesLos AngelesCaliforniaUSA
| | - Lalini Ramanathan
- Department of Psychiatry and Biobehavioral SciencesUniversity of California, Los AngelesLos AngelesCaliforniaUSA
| | - Jerome M. Siegel
- Department of Psychiatry and Biobehavioral SciencesUniversity of California, Los AngelesLos AngelesCaliforniaUSA
- Veterans Administration Greater Los Angeles HealthCare SystemSepulveda, Los AngelesLos AngelesCaliforniaUSA
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de Oliveira PA, Ben J, Matheus FC, Schwarzbold ML, Moreira ELG, Rial D, Walz R, Prediger RD. Moderate traumatic brain injury increases the vulnerability to neurotoxicity induced by systemic administration of 6-hydroxydopamine in mice. Brain Res 2017; 1663:78-86. [PMID: 28288867 DOI: 10.1016/j.brainres.2017.03.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2016] [Revised: 02/06/2017] [Accepted: 03/02/2017] [Indexed: 11/30/2022]
Abstract
Moderate traumatic brain injury (TBI) might increase the vulnerability to neuronal neurodegeneration, but the basis of such selective neuronal susceptibility has remained elusive. In keeping with the disruption of the blood-brain barrier (BBB) caused by TBI, changes in BBB permeability following brain injury could facilitate the access of xenobiotics into the brain. To test this hypothesis, here we evaluated whether TBI would increase the susceptibility of nigrostriatal dopaminergic fibers to the systemic administration of 6-hydroxydopamine (6-OHDA), a classic neurotoxin used to trigger a PD-like phenotype in mice, but that in normal conditions is unable to cross the BBB. Adult Swiss mice were submitted to a moderate TBI using a free weight-drop device and, 5h later, they were injected intraperitoneally with a single dose of 6-OHDA (100mg/kg). Afterwards, during a period of 4weeks, the mice were submitted to a battery of behavioral tests, including the neurological severity score (NSS), the open field and the rotarod. Animals from the TBI plus 6-OHDA group displayed significant motor and neurological impairments that were improved by acute l-DOPA administration (25mg/kg, i.p.). Moreover, the observation of the motor deficits correlates with (i) a significant decrease in the tyrosine hydroxylase levels mainly in the rostral striatum and (ii) a significant increase in the levels of striatal glial fibrillary acidic protein (GFAP) levels. On the whole, the present findings demonstrate that a previous moderate TBI event increases the susceptibility to motor, neurological and neurochemical alterations induced by systemic administration of the dopaminergic neurotoxin 6-OHDA in mice.
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Affiliation(s)
| | - Juliana Ben
- Departamento de Farmacologia, Universidade Federal de Santa Catarina, Florianópolis 88049-900, Brazil; Programa de Pós-Graduação em Neurociências, Universidade Federal de Santa Catarina, Florianópolis 88049-900, Brazil
| | - Filipe Carvalho Matheus
- Departamento de Farmacologia, Universidade Federal de Santa Catarina, Florianópolis 88049-900, Brazil
| | - Marcelo Liborio Schwarzbold
- Programa de Pós-Graduação em Neurociências, Universidade Federal de Santa Catarina, Florianópolis 88049-900, Brazil; Centro de Neurociências Aplicadas (CeNAp), Departamento de Clínica Médica, Universidade Federal de Santa Catarina, Florianópolis 88049-900, Brazil
| | - Eduardo Luiz Gasnhar Moreira
- Programa de Pós-Graduação em Neurociências, Universidade Federal de Santa Catarina, Florianópolis 88049-900, Brazil; Departamento de Ciências Fisiológicas, Universidade Federal de Santa Catarina, Florianópolis 88049-900, Brazil
| | - Daniel Rial
- Departamento de Farmacologia, Universidade Federal de Santa Catarina, Florianópolis 88049-900, Brazil
| | - Roger Walz
- Programa de Pós-Graduação em Neurociências, Universidade Federal de Santa Catarina, Florianópolis 88049-900, Brazil; Centro de Neurociências Aplicadas (CeNAp), Departamento de Clínica Médica, Universidade Federal de Santa Catarina, Florianópolis 88049-900, Brazil
| | - Rui Daniel Prediger
- Departamento de Farmacologia, Universidade Federal de Santa Catarina, Florianópolis 88049-900, Brazil; Programa de Pós-Graduação em Neurociências, Universidade Federal de Santa Catarina, Florianópolis 88049-900, Brazil.
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Nikolaus S, Beu M, de Souza Silva MA, Huston JP, Antke C, Müller HW, Hautzel H. GABAergic control of neostriatal dopamine D 2 receptor binding and behaviors in the rat. Pharmacol Biochem Behav 2016; 153:76-87. [PMID: 28012732 DOI: 10.1016/j.pbb.2016.12.012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 12/15/2016] [Accepted: 12/19/2016] [Indexed: 02/04/2023]
Abstract
PURPOSE The present study assessed the influence of the GABAA receptor agonist muscimol and the GABAA receptor antagonist bicuculline on neostriatal dopamine D2 receptor binding in relation to motor and exploratory behaviors in the rat. METHODS D2 receptor binding was measured in baseline and after challenge with either 1mg/kg muscimol or 1mg/kg bicuculline. In additional rats, D2 receptor binding was measured after injection of saline. After treatment with muscimol, bicuculline and saline, motor and exploratory behaviors were assessed for 30min in an open field prior to administration of [123I]S-3-iodo-N-(1-ethyl-2-pyrrolidinyl)methyl-2-hydroxy-6-methoxybenzamide ([123I]IBZM). For baseline and challenges, striatal equilibrium ratios (V3″) were computed as estimation of the binding potential. RESULTS Muscimol but not bicuculline reduced D2 receptor binding relative to baseline and to saline. Travelled distance, duration of rearing and frequency of rearing and of head-shoulder motility were lower after muscimol compared to saline. In contrast, duration of rearing and grooming and frequency of rearing, head-shoulder motility and grooming were elevated after bicuculline relative to saline. Moreover, bicuculline decreased duration of sitting and head-shoulder motility. CONCLUSIONS The muscimol-induced decrease of motor/exploratory behaviors can be related to an elevation of striatal dopamine levels. In contrast, bicuculline is likely to elicit a decline of synaptic dopamine, which, however, is compensated by the time of D2 receptor imaging studies. The results indicate direct GABAergic control over D2 receptor binding in the neostriatum in relation to behavioral action, and, thus, complement earlier pharmacological studies.
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Affiliation(s)
- Susanne Nikolaus
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Moorenstr. 5, D-40225 Düsseldorf, Germany.
| | - Markus Beu
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Moorenstr. 5, D-40225 Düsseldorf, Germany
| | - Maria Angelica de Souza Silva
- Center for Behavioral Neuroscience, Institute of Experimental Psychology, Heinrich-Heine University, Universitätsstr. 1, D-40225 Düsseldorf, Germany
| | - Joseph P Huston
- Center for Behavioral Neuroscience, Institute of Experimental Psychology, Heinrich-Heine University, Universitätsstr. 1, D-40225 Düsseldorf, Germany
| | - Christina Antke
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Moorenstr. 5, D-40225 Düsseldorf, Germany
| | - Hans-Wilhelm Müller
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Moorenstr. 5, D-40225 Düsseldorf, Germany
| | - Hubertus Hautzel
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, Moorenstr. 5, D-40225 Düsseldorf, Germany
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13
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Nikolaus S, Beu M, Angelica De Souza Silva M, Huston JP, Hautzel H, Antke C, Müller HW. DAT versus D2 receptor binding in the rat striatum: l-DOPA-induced motor activity is better predicted by reuptake than release of dopamine. Synapse 2016; 70:369-77. [PMID: 27164322 DOI: 10.1002/syn.21911] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 05/06/2016] [Accepted: 05/06/2016] [Indexed: 11/07/2022]
Abstract
The reuptake and release of dopamine (DA) can be estimated using in vivo imaging methods by assessing the competition between endogenous DA and an administered exogenous DA transporter (DAT) and D2 receptor (D2 R) radioligand, respectively. The aim of this study was to investigate the comparative roles of DA release vs DA reuptake in the rat striatum with small animal SPECT in relation to l-DOPA-induced behaviors. DAT and D2 R binding, together with behavioral measures, were obtained in 99 rats in response to treatment with either 5 or 10 mg/kg l-DOPA or vehicle. The behavioral parameters included the distance travelled, and durations and frequencies of ambulation, sitting, rearing, head-shoulder motility, and grooming. Data were subjected to a cluster analysis and to a multivariate principal component analysis. The highest DAT binding (i.e., the lowest DA reuptake) was associated with the highest, and the lowest DAT binding (i.e., the highest DA reuptake) was associated with the lowest motor/exploratory activity. The highest and the lowest D2 R binding (i.e., the lowest and the highest DA release, respectively) were merely associated with the second highest and second lowest levels of motor/exploratory activity. These findings indicate that changes in DA reuptake in response to fluctuating DA levels offer a better prediction of motor activity than the release of DA into the synaptic cleft. This dissociation, as reflected by in vivo DAT and D2 R binding data, may be accounted for by the regulatory sensitization meachnisms that occur at D2 R binding sites in response to altered levels of DA. Synapse 70:369-377, 2016. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Susanne Nikolaus
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, D-40225, Germany
| | - Markus Beu
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, D-40225, Germany
| | | | - Joseph P Huston
- Center for Behavioural Neuroscience, Heinrich-Heine University, Düsseldorf, D-40225, Germany
| | - Hubertus Hautzel
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, D-40225, Germany
| | - Christina Antke
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, D-40225, Germany
| | - Hans-Wilhelm Müller
- Clinic of Nuclear Medicine, University Hospital Düsseldorf, D-40225, Germany
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