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Jiang L, Liu N, Zhao F, Huang B, Kang D, Zhan P, Liu X. Discovery of GluN2A subtype-selective N-methyl-d-aspartate (NMDA) receptor ligands. Acta Pharm Sin B 2024; 14:1987-2005. [PMID: 38799621 PMCID: PMC11119548 DOI: 10.1016/j.apsb.2024.01.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2023] [Revised: 12/04/2023] [Accepted: 12/28/2023] [Indexed: 05/29/2024] Open
Abstract
The N-methyl-d-aspartate (NMDA) receptors, which belong to the ionotropic Glutamate receptors, constitute a family of ligand-gated ion channels. Within the various subtypes of NMDA receptors, the GluN1/2A subtype plays a significant role in central nervous system (CNS) disorders. The present article aims to provide a comprehensive review of ligands targeting GluN2A-containing NMDA receptors, encompassing negative allosteric modulators (NAMs), positive allosteric modulators (PAMs) and competitive antagonists. Moreover, the ligands' structure-activity relationships (SARs) and the binding models of representative ligands are also discussed, providing valuable insights for the clinical rational design of effective drugs targeting CNS diseases.
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Affiliation(s)
| | | | - Fabao Zhao
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Boshi Huang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Dongwei Kang
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Peng Zhan
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
| | - Xinyong Liu
- Department of Medicinal Chemistry, Key Laboratory of Chemical Biology (Ministry of Education), School of Pharmaceutical Sciences, Cheeloo College of Medicine, Shandong University, Jinan 250012, China
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Arzua T, Yan Y, Liu X, Dash RK, Liu QS, Bai X. Synaptic and mitochondrial mechanisms behind alcohol-induced imbalance of excitatory/inhibitory synaptic activity and associated cognitive and behavioral abnormalities. Transl Psychiatry 2024; 14:51. [PMID: 38253552 PMCID: PMC10803756 DOI: 10.1038/s41398-024-02748-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/10/2023] [Revised: 01/02/2024] [Accepted: 01/08/2024] [Indexed: 01/24/2024] Open
Abstract
Alcohol consumption during pregnancy can significantly impact the brain development of the fetus, leading to long-term cognitive and behavioral problems. However, the underlying mechanisms are not well understood. In this study, we investigated the acute and chronic effects of binge-like alcohol exposure during the third trimester equivalent in postnatal day 7 (P7) mice on brain cell viability, synapse activity, cognitive and behavioral performance, and gene expression profiles at P60. Our results showed that alcohol exposure caused neuroapoptosis in P7 mouse brains immediately after a 6-hour exposure. In addition, P60 mice exposed to alcohol during P7 displayed impaired learning and memory abilities and anxiety-like behaviors. Electrophysiological analysis of hippocampal neurons revealed an excitatory/inhibitory imbalance in alcohol-treated P60 mice compared to controls, with decreased excitation and increased inhibition. Furthermore, our bioinformatic analysis of 376 dysregulated genes in P60 mouse brains following alcohol exposure identified 50 synapse-related and 23 mitochondria-related genes. These genes encoded proteins located in various parts of the synapse, synaptic cleft, extra-synaptic space, synaptic membranes, or mitochondria, and were associated with different biological processes and functions, including the regulation of synaptic transmission, transport, synaptic vesicle cycle, metabolism, synaptogenesis, mitochondrial activity, cognition, and behavior. The dysregulated synapse and mitochondrial genes were predicted to interact in overlapping networks. Our findings suggest that altered synaptic activities and signaling networks may contribute to alcohol-induced long-term cognitive and behavioral impairments in mice, providing new insights into the underlying synaptic and mitochondrial molecular mechanisms and potential neuroprotective strategies.
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Affiliation(s)
- Thiago Arzua
- Department of Cell Biology, Neurobiology & Anatomy, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Yasheng Yan
- Department of Cell Biology, Neurobiology & Anatomy, Medical College of Wisconsin, Milwaukee, WI, 53226, USA
| | - Xiaojie Liu
- Department of Pharmacology, Medical College of Wisconsin, Milwaukee, 53226, WI, USA
| | - Ranjan K Dash
- Department of Biomedical Engineering, Medical College of Wisconsin, Milwaukee, 53226, WI, USA
| | - Qing-Song Liu
- Department of Pharmacology, Medical College of Wisconsin, Milwaukee, 53226, WI, USA
| | - Xiaowen Bai
- Department of Cell Biology, Neurobiology & Anatomy, Medical College of Wisconsin, Milwaukee, WI, 53226, USA.
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Boerma T, Ter Haar S, Ganga R, Wijnen F, Blom E, Wierenga CJ. What risk factors for Developmental Language Disorder can tell us about the neurobiological mechanisms of language development. Neurosci Biobehav Rev 2023; 154:105398. [PMID: 37741516 DOI: 10.1016/j.neubiorev.2023.105398] [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: 04/21/2023] [Revised: 07/03/2023] [Accepted: 09/17/2023] [Indexed: 09/25/2023]
Abstract
Language is a complex multidimensional cognitive system that is connected to many neurocognitive capacities. The development of language is therefore strongly intertwined with the development of these capacities and their neurobiological substrates. Consequently, language problems, for example those of children with Developmental Language Disorder (DLD), are explained by a variety of etiological pathways and each of these pathways will be associated with specific risk factors. In this review, we attempt to link previously described factors that may interfere with language development to putative underlying neurobiological mechanisms of language development, hoping to uncover openings for future therapeutical approaches or interventions that can help children to optimally develop their language skills.
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Affiliation(s)
- Tessel Boerma
- Institute for Language Sciences, Department of Languages, Literature and Communication, Utrecht University, Utrecht, the Netherlands
| | - Sita Ter Haar
- Institute for Language Sciences, Department of Languages, Literature and Communication, Utrecht University, Utrecht, the Netherlands; Cognitive Neurobiology and Helmholtz Institute, Department of Psychology, Utrecht University/Translational Neuroscience, University Medical Center Utrecht, the Netherlands
| | - Rachida Ganga
- Institute for Language Sciences, Department of Languages, Literature and Communication, Utrecht University, Utrecht, the Netherlands
| | - Frank Wijnen
- Institute for Language Sciences, Department of Languages, Literature and Communication, Utrecht University, Utrecht, the Netherlands
| | - Elma Blom
- Department of Development and Education of youth in Diverse Societies (DEEDS), Utrecht University, Utrecht, the Netherlands; Department of Language and Culture, The Arctic University of Norway UiT, Tromsø, Norway.
| | - Corette J Wierenga
- Biology Department, Faculty of Science, Utrecht University, the Netherlands; Donders Institute for Brain, Cognition and Behaviour, Radboud University, Nijmegen, the Netherlands.
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4
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Deschamps C, Debris M, Vilpoux C, Naassila M, Pierrefiche O. [Binge drinking in the young population: Lost memory after initial ethanol exposure via neuroinflammation and epigenetic]. Med Sci (Paris) 2023; 39:31-37. [PMID: 36692315 DOI: 10.1051/medsci/2022191] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Binge drinking (BD) in young adults/adolescents can lead to cognitive deficits in the adult probably through neuroinflammation and epigenetic. However, the mode of action of alcohol during the initial exposure is less known while it may be the origin of the deficits seen in adults. Recent studies in adolescent rat hippocampus revealed that loss of memory occurred since the very first exposure to BD with similar mechanisms than those highlighted for longer alcohol exposure. Thus, initiation to BD in the young is responsible for cognitive deficits that will be probably entertained by repeated BD behavior. These kind of data may serve to reinforce the prevention campaigns towards the young population who practice BD.
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Affiliation(s)
- Chloé Deschamps
- Université de Picardie Jules Verne, Inserm UMR1247 GRAP, Amiens, France
| | - Margot Debris
- Université de Picardie Jules Verne, Inserm UMR1247 GRAP, Amiens, France
| | - Catherine Vilpoux
- Université de Picardie Jules Verne, Inserm UMR1247 GRAP, Amiens, France
| | - Mickael Naassila
- Université de Picardie Jules Verne, Inserm UMR1247 GRAP, Amiens, France
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Filarowska-Jurko J, Komsta L, Smaga I, Surowka P, Marszalek-Grabska M, Grochecki P, Nizio D, Filip M, Kotlinska JH. Maternal Separation Alters Ethanol Drinking and Reversal Learning Processes in Adolescent Rats: The Impact of Sex and Glycine Transporter Type 1 (GlyT1) Inhibitor. Int J Mol Sci 2022; 23:ijms23105350. [PMID: 35628160 PMCID: PMC9141364 DOI: 10.3390/ijms23105350] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2022] [Revised: 05/07/2022] [Accepted: 05/09/2022] [Indexed: 11/16/2022] Open
Abstract
Adverse early life experiences are associated with an enhanced risk for mental and physical health problems, including substance abuse. Despite clinical evidence, the mechanisms underlying these relationships are not fully understood. Maternal separation (MS) is a commonly used animal model of early neglect. The aim of the current study is to determine whether the N-methyl-D-aspartate receptor (NMDAR)/glycine sites are involved in vulnerability to alcohol consumption (two-bottle choice paradigm) and reversal learning deficits (Barnes maze task) in adolescent rats subjected to the MS procedure and whether these effects are sex dependent. By using ELISA, we evaluated MS-induced changes in the NMDAR subunits (GluN1, GluN2A, GluN2B) expression, especially in the glycine-binding subunit, GluN1, in the prefrontal cortex (PFC) and ventral striatum (vSTR) of male/female rats. Next, we investigated whether Org 24598, a glycine transporter 1 (GlyT1) inhibitor, was able to modify ethanol drinking in adolescent and adult male/female rats with prior MS experience and reversal learning in the Barnes maze task. Our findings revealed that adolescent MS female rats consumed more alcohol which may be associated with a substantial increase in GluN1 subunit of NMDAR in the PFC and vSTR. Org 24598 decreased ethanol intake in both sexes with a more pronounced decrease in ethanol consumption in adolescent female rats. Furthermore, MS showed deficits in reversal learning in both sexes. Org 24598 ameliorated reversal learning deficits, and this effect was reversed by the NMDAR/glycine site inhibitor, L-701,324. Collectively, our results suggest that NMDAR/glycine sites might be targeted in the treatment of alcohol abuse in adolescents with early MS, especially females.
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Affiliation(s)
- Joanna Filarowska-Jurko
- Department of Pharmacology and Pharmacodynamics, Medical University, Chodzki 4A, 20-093 Lublin, Poland; (J.F.-J.); (P.G.)
| | - Lukasz Komsta
- Department of Medicinal Chemistry, Medical University, Jaczewskiego 4, 20-090 Lublin, Poland;
| | - Irena Smaga
- Department of Drug Addiction Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, Smetna 12, 31-324 Krakow, Poland; (I.S.); (P.S.); (M.F.)
| | - Paulina Surowka
- Department of Drug Addiction Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, Smetna 12, 31-324 Krakow, Poland; (I.S.); (P.S.); (M.F.)
| | - Marta Marszalek-Grabska
- Department of Experimental and Clinical Pharmacology, Medical University, Jaczewskiego 8b, 20-090 Lublin, Poland;
| | - Pawel Grochecki
- Department of Pharmacology and Pharmacodynamics, Medical University, Chodzki 4A, 20-093 Lublin, Poland; (J.F.-J.); (P.G.)
| | - Dorota Nizio
- Experimental Medicine Center, Medical University, Jaczewskiego 8, 20-090 Lublin, Poland;
| | - Malgorzata Filip
- Department of Drug Addiction Pharmacology, Maj Institute of Pharmacology, Polish Academy of Sciences, Smetna 12, 31-324 Krakow, Poland; (I.S.); (P.S.); (M.F.)
| | - Jolanta H. Kotlinska
- Department of Pharmacology and Pharmacodynamics, Medical University, Chodzki 4A, 20-093 Lublin, Poland; (J.F.-J.); (P.G.)
- Correspondence: ; Tel.: +48-81-448-7255; Fax: +48-81-448-7250
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Thompson SL, Gianessi CA, O'Malley SS, Cavallo DA, Shi JM, Tetrault JM, DeMartini KS, Gueorguieva R, Pittman B, Krystal JH, Taylor JR, Krishnan-Sarin S. Saracatinib Fails to Reduce Alcohol-Seeking and Consumption in Mice and Human Participants. Front Psychiatry 2021; 12:709559. [PMID: 34531767 PMCID: PMC8438169 DOI: 10.3389/fpsyt.2021.709559] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2021] [Accepted: 08/03/2021] [Indexed: 11/13/2022] Open
Abstract
More effective treatments to reduce pathological alcohol drinking are needed. The glutamatergic system and the NMDA receptor (NMDAR), in particular, are implicated in behavioral and molecular consequences of chronic alcohol use, making the NMDAR a promising target for novel pharmacotherapeutics. Ethanol exposure upregulates Fyn, a protein tyrosine kinase that indirectly modulates NMDAR signaling by phosphorylating the NR2B subunit. The Src/Fyn kinase inhibitor saracatinib (AZD0530) reduces ethanol self-administration and enhances extinction of goal-directed ethanol-seeking in mice. However, less is known regarding how saracatinib affects habitual ethanol-seeking. Moreover, no prior studies have assessed the effects of Src/Fyn kinase inhibitors on alcohol-seeking or consumption in human participants. Here, we tested the effects of saracatinib on alcohol consumption and craving/seeking in two species, including the first trial of an Src/Fyn kinase inhibitor to reduce drinking in humans. Eighteen male C57BL/6NCrl mice underwent operant conditioning on a variable interval schedule to induce habitual responding for 10% ethanol/0.1% saccharin. Next, mice received 5 mg/kg saracatinib or vehicle 2 h or 30 min prior to contingency degradation to measure habitual responding. In the human study, 50 non-treatment seeking human participants who drank heavily and met DSM-IV criteria for alcohol abuse or dependence were randomized to receive 125 mg/day saracatinib (n = 33) or placebo (n = 17). Alcohol Drinking Paradigms (ADP) were completed in a controlled research setting: before and after 7-8 days of treatment. Each ADP involved consumption of a priming drink of alcohol (0.03 mg%) followed by ad libitum access (3 h) to 12 additional drinks (0.015 g%); the number of drinks consumed and craving (Alcohol Urge Questionnaire) were recorded. In mice, saracatinib did not affect habitual ethanol seeking or consumption at either time point. In human participants, no significant effects of saracatinib on alcohol craving or consumption were identified. These results in mice and humans suggest that Fyn kinase inhibition using saracatinib, at the doses tested here, may not reduce alcohol consumption or craving/seeking among those habitually consuming alcohol, in contrast to reports of positive effects of saracatinib in individuals that seek ethanol in a goal-directed manner. Nevertheless, future studies should confirm these negative findings using additional doses and schedules of saracatinib administration.
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Affiliation(s)
- Summer L Thompson
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States
| | - Carol A Gianessi
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States.,Interdepartmental Neuroscience Program, Yale University Graduate School of Arts and Sciences, New Haven, CT, United States
| | - Stephanie S O'Malley
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States
| | - Dana A Cavallo
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States
| | - Julia M Shi
- Program in Addiction Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, United States
| | - Jeanette M Tetrault
- Program in Addiction Medicine, Department of Internal Medicine, Yale University School of Medicine, New Haven, CT, United States
| | - Kelly S DeMartini
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States
| | - Ralitza Gueorguieva
- Department of Biostatistics, Yale University School of Public Health, New Haven, CT, United States
| | - Brian Pittman
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States
| | - John H Krystal
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States.,Department of Neuroscience, Yale University School of Medicine, New Haven, CT, United States
| | - Jane R Taylor
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States.,Department of Neuroscience, Yale University School of Medicine, New Haven, CT, United States.,Department of Psychology, Yale University, New Haven, CT, United States
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7
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Sautreuil C, Laquerrière A, Lecuyer M, Brasse-Lagnel C, Jégou S, Bekri S, Marcorelles P, Gil S, Marret S, Gonzalez BJ. [Fetal alcohol exposure: when placenta would help to the early diagnosis of child brain impairments]. Med Sci (Paris) 2019; 35:859-865. [PMID: 31845877 DOI: 10.1051/medsci/2019167] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Alcohol consumption during pregnancy constitutes a major cause of neurodevelopmental and behavioral disabilities. Whereas it is possible for clinicians to establish a perinatal diagnosis of fetal alcohol syndrome, the more severe expression of fetal alcohol spectrum disorder (FASD), most FASD children are late or mis-diagnosed due to a lack of clear morphological and neurodevelopmental abnormalities. Several precious years of care are consequently lost. Recent data revealed a functional placenta-brain axis involved in the control of the fetal brain angiogenesis which is impaired by in utero alcohol exposure. Because in the developing fetal brain a correct angiogenesis is required for a correct neurodevelopment, these preclinical and clinical advances pave the way for a new generation of placental biomarkers for early diagnosis of FASD.
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Affiliation(s)
- Camille Sautreuil
- Inserm U1245, Équipe 4, Rouen Université, Normandie Université, Rouen, France
| | - Annie Laquerrière
- Inserm U1245, Équipe 4, Rouen Université, Normandie Université, Rouen, France - Service de Pathologie, Hôpital Charles-Nicolle, CHU de Rouen, France
| | - Matthieu Lecuyer
- Inserm U1245, Équipe 4, Rouen Université, Normandie Université, Rouen, France
| | | | - Sylvie Jégou
- Inserm U1245, Équipe 4, Rouen Université, Normandie Université, Rouen, France
| | - Soumeya Bekri
- Inserm U1245, Équipe 4, Rouen Université, Normandie Université, Rouen, France - Service de Biochimie métabolique, Hôpital Charles-Nicolle, CHU de Rouen, France
| | | | - Sophie Gil
- Inserm UMR-S1139, Université Paris Descartes, Sorbonne Paris Cité, Fondation PremUp, Paris, France
| | - Stéphane Marret
- Inserm U1245, Équipe 4, Rouen Université, Normandie Université, Rouen, France - Service de Pédiatrie Néonatale et Réanimation, Neuropédiatrie, Camsp, Hôpital Charles-Nicolle, CHU de Rouen, 37 boulevard Gambetta, 76000 Rouen, France
| | - Bruno J Gonzalez
- Inserm U1245, Équipe 4, Rouen Université, Normandie Université, Rouen, France
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Projection-Specific Potentiation of Ventral Pallidal Glutamatergic Outputs after Abstinence from Cocaine. J Neurosci 2019; 40:1276-1285. [PMID: 31836662 DOI: 10.1523/jneurosci.0929-19.2019] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 12/05/2019] [Accepted: 12/10/2019] [Indexed: 12/18/2022] Open
Abstract
The ventral pallidum (VP) is a central node in the reward system that is strongly implicated in reward and addiction. Although the majority of VP neurons are GABAergic and encode reward, recent studies revealed a novel glutamatergic neuronal population in the VP [VP neurons expressing the vesicular glutamate transporter 2 (VPVGluT2)], whose activation generates aversion. Withdrawal from drugs has been shown to induce drastic synaptic changes in neuronal populations associated with reward, such as the ventral tegmental area (VTA) or nucleus accumbens neurons, but less is known about cocaine-induced synaptic changes in neurons classically linked with aversion. Here, we demonstrate that VPVGluT2 neurons contact different targets with different intensities, and that cocaine conditioned place preference (CPP) training followed by abstinence selectively potentiates their synapses on targets that encode aversion. Using whole-cell patch-clamp recordings combined with optogenetics in male and female transgenic mice, we show that VPVGluT2 neurons preferentially contact aversion-related neurons, such as lateral habenula neurons and VTA GABAergic neurons, with minor input to reward-related neurons, such as VTA dopamine and VP GABA neurons. Moreover, after cocaine CPP and abstinence, the VPVGluT2 input to the aversion-related structures is potentiated, whereas the input to the reward-related structures is depressed. Thus, cocaine CPP followed by abstinence may allow VPVGluT2 neurons to recruit aversion-related targets more readily and therefore be part of the mechanism underlying the aversive symptoms seen after withdrawal.SIGNIFICANCE STATEMENT The biggest problem in drug addiction is the high propensity to relapse. One central driver for relapse events is the negative aversive symptoms experienced by addicts during withdrawal. In this work, we propose a possible mechanism for the intensification of aversive feelings after withdrawal that involves the glutamatergic neurons of the ventral pallidum. We show not only that these neurons are most strongly connected to aversive targets, such as the lateral habenula, but also that, after abstinence, their synapses on aversive targets are strengthened, whereas the synapses on other rewarding targets are weakened. These data illustrate how after abstinence from cocaine, aversive pathways change in a manner that may contribute to relapse.
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Lai CC, Hsu JW, Cheng YS, Lin HH. Involvement of metabotropic glutamate receptor 5 in ethanol regulation of NMDA receptor activity in rat substantia gelatinosa neurons. Life Sci 2019; 233:116729. [PMID: 31386876 DOI: 10.1016/j.lfs.2019.116729] [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: 05/07/2019] [Revised: 06/28/2019] [Accepted: 08/02/2019] [Indexed: 11/17/2022]
Abstract
AIMS Glutamatergic receptors are important targets of ethanol. Intake of ethanol may produce analgesic effects. The present study examined the effects of ethanol on the activity of ionotropic glutamate receptors in spinal cord substantia gelatinosa (SG) neurons, critical neurons involved in nociceptive transmission. MAIN METHODS Whole-cell recordings were made from SG neurons of the lumbar spinal cord slices from 15 to 20-day-old rats. Ethanol and glutamate receptor agonists or antagonists were applied by superfusion. KEY FINDING Ethanol (50 and 100 mM) applied by superfusion for 5 min dose-dependently decreased the amplitude of evoked excitatory postsynaptic potential in SG neurons. Superfusion of ethanol (100 mM) for 15 min consistently inhibited NMDA- or AMPA-induced depolarizations in SG neurons. Ethanol (100 mM) also inhibited the depolarizations induced by glutamate. However, ethanol inhibition of glutamate-induced responses significantly decreased at 10-15 min following continuous superfusion, suggesting the development of acute tolerance to the inhibition during prolonged exposure. Application of MPEP hydrochloride (an antagonist of metabotropic glutamate receptor [mGluR] 5) or GF109203X (a protein kinase C [PKC] inhibitor), together with ethanol significantly blocked the tolerance. The inhibition by ethanol of the NMDA-induced, but not AMPA-induced, depolarizations significantly decreased at 15 min during continuous superfusion while ACPD (a mGluR agonist) was co-applied with ethanol. SIGNIFICANCE The results suggest that (1) ethanol exposure may inhibit ionotropic glutamate receptor-mediated neurotransmission; (2) regulation of NMDA receptor function by mGluR5/PKC pathways may be involved in the development of the tolerance to ethanol inhibition of glutamate-induced responses during prolonged exposure in SG neurons.
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Affiliation(s)
- Chih-Chia Lai
- Department of Pharmacology, School of Medicine, Tzu Chi University, Hualien, Taiwan 970; Master and Ph.D. Programs in Pharmacology and Toxicology, School of Medicine, Tzu Chi University, Hualien, Taiwan 970
| | - Jhih-Wei Hsu
- Master Program in Medical Physiology, School of Medicine, Tzu Chi University, Hualien, Taiwan 970
| | - Yi-Shan Cheng
- Master and Ph.D. Programs in Pharmacology and Toxicology, School of Medicine, Tzu Chi University, Hualien, Taiwan 970
| | - Hsun-Hsun Lin
- Master Program in Medical Physiology, School of Medicine, Tzu Chi University, Hualien, Taiwan 970; Department of Physiology, School of Medicine, Tzu Chi University, Hualien, Taiwan 970.
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Dow-Edwards D, MacMaster FP, Peterson BS, Niesink R, Andersen S, Braams BR. Experience during adolescence shapes brain development: From synapses and networks to normal and pathological behavior. Neurotoxicol Teratol 2019; 76:106834. [PMID: 31505230 DOI: 10.1016/j.ntt.2019.106834] [Citation(s) in RCA: 45] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Revised: 07/27/2019] [Accepted: 09/06/2019] [Indexed: 12/20/2022]
Abstract
Adolescence is a period of dramatic neural reorganization creating a period of vulnerability and the possibility for the development of psychopathology. The maturation of various neural circuits during adolescence depends, to a large degree, on one's experiences both physical and psychosocial. This occurs through a process of plasticity which is the structural and functional adaptation of the nervous system in response to environmental demands, physiological changes and experiences. During adolescence, this adaptation proceeds upon a backdrop of structural and functional alterations imparted by genetic and epigenetic factors and experiences both prior to birth and during the postnatal period. Plasticity entails an altering of connections between neurons through long-term potentiation (LTP) (which alters synaptic efficiency), synaptogenesis, axonal sprouting, dendritic remodeling, neurogenesis and recruitment (Skaper et al., 2017). Although most empirical evidence for plasticity derives from studies of the sensory systems, recent studies have suggested that during adolescence, social, emotional, and cognitive experiences alter the structure and function of the networks subserving these domains of behavior. Each of these neural networks exhibits heightened vulnerability to experience-dependent plasticity during the sensitive periods which occur in different circuits and different brain regions at specific periods of development. This report will summarize some examples of adaptation which occur during adolescence and some evidence that the adolescent brain responds differently to stimuli compared to adults and children. This symposium, "Experience during adolescence shapes brain development: from synapses and networks to normal and pathological behavior" occurred during the Developmental Neurotoxicology Society/Teratology Society Annual Meeting in Clearwater Florida, June 2018. The sections will describe the maturation of the brain during adolescence as studied using imaging technologies, illustrate how plasticity shapes the structure of the brain using examples of pathological conditions such as Tourette's' syndrome and attention deficit hyperactivity disorder, and a review of the key molecular systems involved in this plasticity and how some commonly abused substances alter brain development. The role of stimulants used in the treatment of attention deficit hyperactivity disorder (ADHD) in the plasticity of the reward circuit is then described. Lastly, clinical data promoting an understanding of peer-influences on risky behavior in adolescents provides evidence for the complexity of the roles that peers play in decision making, a phenomenon different from that in the adult. Imaging studies have revealed that activation of the social network by the presence of peers at times of decision making is unique in the adolescent. Since normal brain development relies on experiences which alter the functional and structural connections between cells within circuits and networks to ultimately alter behavior, readers can be made aware of the myriad of ways normal developmental processes can be hijacked. The vulnerability of developing adolescent brain places the adolescent at risk for the development of a life time of abnormal behaviors and mental disorders.
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Affiliation(s)
- Diana Dow-Edwards
- Department of Physiology & Pharmacology, State University of New York, Downstate Medical Center, Brooklyn, NY, United States of America.
| | - Frank P MacMaster
- Departments of Psychiatry & Pediatrics, University of Calgary, Addiction and Mental Health Strategic Clinical Network, Calgary, Alberta, Canada
| | - Bradley S Peterson
- Children's Hospital Los Angeles, The Keck School of Medicine at the University of Southern California, Los Angeles, CA, United States of America
| | - Raymond Niesink
- Trimbos Institute, Netherlands Institute of Mental Health and Addiction, Utrecht, the Netherlands; Faculty of Management, Science and Technology, School of Science, Open University of the Netherlands, Heerlen, the Netherlands
| | - Susan Andersen
- McLean Hospital, Department of Psychiatry, Harvard Medical School, Boston, MA, United States of America
| | - B R Braams
- Department of Psychology, Center for Brain Science, Harvard University, Cambridge, MA, United States of America
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Contreras A, Polín E, Miguéns M, Pérez-García C, Pérez V, Ruiz-Gayo M, Morales L, Del Olmo N. Intermittent-Excessive and Chronic-Moderate Ethanol Intake during Adolescence Impair Spatial Learning, Memory and Cognitive Flexibility in the Adulthood. Neuroscience 2019; 418:205-217. [PMID: 31491502 DOI: 10.1016/j.neuroscience.2019.08.051] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Revised: 08/28/2019] [Accepted: 08/29/2019] [Indexed: 02/06/2023]
Abstract
Intermittent and excessive ethanol consumption over very short periods of time, known as binge drinking, is common in the adolescence, considered a vulnerable period to the effects of alcohol in terms of cognitive performance. One of the brain functions most drastically affected by ethanol in adolescent individuals seems to be spatial learning and memory dependent on the hippocampus. In the current study we have focused on the long-lasting effects on spatial learning and memory of intermittent and excessive alcohol consumption compared to chronic and moderate alcohol exposure during adolescence. Five-week old male Wistar rats consumed ethanol for 24 days following two different self-administration protocols that differed in the intake pattern. Spatial learning and memory were evaluated in the radial arm maze. Hippocampal synaptic plasticity was assessed by measuring field excitatory postsynaptic potentials. Hippocampal expression of AMPA and NMDA receptor subunits as well as levels of phosphorylated Ser9-GSK3β (the inactive form of GSK3β) were also quantified. Our results show that both patterns of ethanol intake during adolescence impair spatial learning, memory and cognitive flexibility in the adulthood in a dose-dependent way. Nevertheless, changes in synaptic plasticity, gene expression and levels of inactive GSK3β depended on the pattern of ethanol intake.
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Affiliation(s)
- Ana Contreras
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU-San Pablo, Madrid, Spain
| | - Eduardo Polín
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU-San Pablo, Madrid, Spain
| | - Miguel Miguéns
- Departamento de Psicología Básica I, Facultad de Psicología, UNED, Spain
| | - Carmen Pérez-García
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU-San Pablo, Madrid, Spain
| | - Vicente Pérez
- Departamento de Psicología Básica I, Facultad de Psicología, UNED, Spain
| | - Mariano Ruiz-Gayo
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU-San Pablo, Madrid, Spain
| | - Lidia Morales
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU-San Pablo, Madrid, Spain
| | - Nuria Del Olmo
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU-San Pablo, Madrid, Spain.
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Contreras A, Morales L, Del Olmo N. The intermittent administration of ethanol during the juvenile period produces changes in the expression of hippocampal genes and proteins and deterioration of spatial memory. Behav Brain Res 2019; 372:112033. [PMID: 31201872 DOI: 10.1016/j.bbr.2019.112033] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 06/10/2019] [Accepted: 06/11/2019] [Indexed: 12/14/2022]
Abstract
BACKGROUND Binge drinking is a pattern of alcohol intake characterized by excessive and intermittent alcohol consumption over a very short period of time that is more used during adolescence. We aim to compare the lasting effects of a chronic-moderate vs. this intermittent-excessive way of alcohol intake during adolescence in spatial memory and in the expression of glutamatergic receptors and GSK3β activity. METHODS Adolescent male Wistar rats were given ethanol/saline i.p. injections in four different groups: High-I (4 g/kg of a 25% (vol/vol) every 3 days), Low-I (1 g/kg of a 5% (vol/vol) every 3 days), M (0.3 g/kg of a 2.5% (vol/vol) daily) and Control (C, sterile isotonic saline daily). Rats received ethanol for up to five 3-day cycles. Spatial memory was measured by spontaneous alternation in the Y-Maze. Gene and protein expression of hippocampal proteins were also analysed. RESULTS Both high- and low-intermittent ethanol administration produced spatial memory impairment and changes in glutamatergic receptors gene expression were observed regardless of the pattern of exposure. High doses of intermittent alcohol administration produced an increase of phosphorylation of GSK3β Ser9. Moreover, moderate alcohol administration produced a down-regulation of the AMPAR 2/3 ratio despite lack of spatial memory deficits. CONCLUSIONS Excessive and intermittent ethanol exposure during adolescence impaired the spatial memory processes during adulthood regardless of the amount of alcohol administered. Moreover, chronic-moderate and intermittent pattern induced changes in the expression of glutamatergic receptors. In addition, high-intermittent ethanol exposure during adolescence inactivated GSK3β by increasing its phosphorylation in Ser9.
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Affiliation(s)
- Ana Contreras
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU-San Pablo, Spain
| | - Lidia Morales
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU-San Pablo, Spain
| | - Nuria Del Olmo
- Departamento de Ciencias Farmacéuticas y de la Salud, Facultad de Farmacia, Universidad CEU-San Pablo, Spain.
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Lavanco G, Castelli V, Brancato A, Tringali G, Plescia F, Cannizzaro C. The endocannabinoid-alcohol crosstalk: Recent advances on a bi-faceted target. Clin Exp Pharmacol Physiol 2018; 45:889-896. [PMID: 29770478 DOI: 10.1111/1440-1681.12967] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2018] [Revised: 05/04/2018] [Accepted: 05/07/2018] [Indexed: 12/22/2022]
Abstract
Increasing evidence has focusesed on the endocannabinoid system as a relevant player in the induction of aberrant synaptic plasticity and related addictive phenotype following chronic excessive alcohol drinking. In addition, the endocannabinoid system is implicated in the pathogenesis of alcoholic liver disease. Interestingly, whereas the involvement of CB1 receptors in alcohol rewarding properties is established, the central and peripheral action of CB2 signalling is still to be elucidated. This review aims at giving the input to deepen knowledge on the role of the endocannabinoid system, highlighting the advancing evidence that suggests that CB1 and CB2 receptors may play opposite roles in the regulation of both the reinforcing properties of alcohol in the brain and the mechanisms responsible for cell injury and inflammation in the hepatic tissue. The manipulation of the endocannabinoid system could represent a bi-faceted strategy to counteract alcohol-related dysfunction in central transmission and liver structural and functional disarrangement.
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Affiliation(s)
- Gianluca Lavanco
- Department of Biomedical and Biotechnological Sciences, School of Medicine, University of Catania, Catania, Italy
| | - Valentina Castelli
- Department of Sciences for Health Promotion and Mother and Child Care "Giuseppe D'Alessandro", University of Palermo, Palermo, Italy
| | - Anna Brancato
- Department of Sciences for Health Promotion and Mother and Child Care "Giuseppe D'Alessandro", University of Palermo, Palermo, Italy
| | - Giuseppe Tringali
- Institute of Pharmacology, Catholic University School of Medicine, Rome, Italy
| | - Fulvio Plescia
- Department of Sciences for Health Promotion and Mother and Child Care "Giuseppe D'Alessandro", University of Palermo, Palermo, Italy
| | - Carla Cannizzaro
- Department of Sciences for Health Promotion and Mother and Child Care "Giuseppe D'Alessandro", University of Palermo, Palermo, Italy
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