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Cheng S, Xu J, Wang W, Wang R, Li H, Jiang Z, Liu D, Pan F. Inhibition of mGluR5 alters BDNF/TrkB and GLT-1 expression in the prefrontal cortex and hippocampus and ameliorates PTSD-like behavior in rats. Psychopharmacology (Berl) 2023; 240:837-851. [PMID: 36725696 DOI: 10.1007/s00213-023-06325-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 01/23/2023] [Indexed: 02/03/2023]
Abstract
RATIONALE AND OBJECTIVE Post-traumatic stress disorder (PTSD) is a prevalent and debilitating psychiatric disorder. However, its specific etiological mechanism remains unclear. Previous studies have shown that traumatic stress changes metabotropic glutamate receptor 5 (mGluR5) expression in the hippocampus (HIP) and prefrontal cortex (PFC). More importantly, mGluR5 expression is often accompanied by alterations in brain-derived neurotrophic factor (BDNF). Furthermore, BDNF/tropomyosin-associated kinase B (TrkB) signaling plays multiple roles, including roles in neuroplasticity and antidepressant activity, by regulating glutamate transporter-1 (GLT-1) expression. This study aims to explore the effects of inhibiting mGluR5 on PTSD-like behaviors and BDNF, TrkB, and GLT-1 expression in the HIP and PFC of inevitable foot shock (IFS)-treated rats. METHODS Seven-day IFS was used to establish a PTSD rat model, and 2-methyl-6-(phenylethynyl)-pyridine (MPEP) (10 mg/kg, intraperitoneal injection) was used to inhibit the activity of mGluR5 during IFS in rats. After modeling, behavioral changes and mGluR5, BDNF, TrkB, and GLT-1 expression in the PFC and HIP were examined. RESULTS First, the IFS procedure induced PTSD-like behavior. Second, IFS increased the expression of mGluR5 and decreased BDNF, TrkB, and GLT-1 expression in the PFC and HIP. Third, the mGluR5 antagonist blocked the above behavioral and molecular alterations. CONCLUSIONS mGluR5 was involved in IFS-induced PTSD-like behavior by changing BDNF, TrkB, and GLT-1 expression.
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Affiliation(s)
- Shuyue Cheng
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong, 250012, People's Republic of China
| | - Jingjing Xu
- Department of Clinical Psychology, Qilu Hospital (Qingdao), Cheeloo College of Medicine, Shandong University, 758 Hefei Road, Qingdao, 266035, Shandong, China
| | - Wei Wang
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong, 250012, People's Republic of China
| | - Rui Wang
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong, 250012, People's Republic of China
| | - Haonan Li
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong, 250012, People's Republic of China
| | - Zhijun Jiang
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong, 250012, People's Republic of China
| | - Dexiang Liu
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong, 250012, People's Republic of China
| | - Fang Pan
- Department of Medical Psychology and Ethics, School of Basic Medical Medicine Sciences, Cheeloo College of Medicine, Shandong University, 44#, Wenhua Xi Road, Jinan, Shandong, 250012, People's Republic of China.
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2
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O'Brien B, Lee J, Kim S, Nandra GS, Pannu P, Swann AC, Murphy N, Tamman AJF, Amarneh D, Lijffijt M, Averill LA, Mathew SJ. Replication of distinct trajectories of antidepressant response to intravenous ketamine. J Affect Disord 2023; 321:140-146. [PMID: 36302492 DOI: 10.1016/j.jad.2022.10.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 10/08/2022] [Accepted: 10/18/2022] [Indexed: 11/06/2022]
Abstract
BACKGROUND The goal of this study was to replicate previous findings of three distinct treatment response pathways associated with repeated intravenous (IV) ketamine infusions among patients with major depressive disorder (MDD). METHODS We conducted growth mixture modeling to estimate latent classes of change in depression (Quick Inventory of Depressive Symptomatology-Self Report, QIDS-SR) across six treatment visits in 298 patients with MDD treated with IV ketamine in an outpatient community clinic. Mean age was 40.36 and patients were primarily male (58.4 %). The sample had relatively severe depression (QIDS-SR = 16.61) at pre-treatment and the majority had not responded to at least two prior medications. RESULTS Best-fit indices indicated three trajectory groups to optimally demonstrate non-linear, quadratic changes in depressive symptoms during ketamine treatment. Two groups had severe depression at baseline but diverged into a group of modest improvement over the treatment course (n = 78) and a group of patients with rapid improvement (n = 103). A third group had moderate depression at baseline with moderate improvement during the treatment course (n = 117). Additional planned trajectory comparisons showed that suicidality at entry was higher in the high depression groups and that change in suicidality severity followed that of depression. LIMITATIONS This was a retrospective analysis of a naturalistic sample. Patients were unblinded and more heterogenous than those included in most controlled clinical trial samples. CONCLUSIONS This replication study in an independent community-based ketamine clinic sample revealed similar response trajectories, with only about a third of depressed patients benefitting substantially from an acute induction course of ketamine infusions.
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Affiliation(s)
- Brittany O'Brien
- Baylor College of Medicine, Menninger Department of Psychiatry and Behavioral Sciences, 1977 Butler Boulevard, Houston, TX 77030, USA; Michael E. DeBakey VA Medical Center, 2002 Holcombe Boulevard, Houston, TX 77030, USA. Brittany.o'
| | - Jaehoon Lee
- Baylor College of Medicine, Menninger Department of Psychiatry and Behavioral Sciences, 1977 Butler Boulevard, Houston, TX 77030, USA; Texas Tech University, Department of Educational Psychology, Leadership, and Counseling, 2500 Broadway, Lubbock, TX, 79409, USA; The Menninger Clinic, 12301 S Main Street, Houston, TX, 77035, USA
| | - Seungman Kim
- Texas Tech University, Department of Educational Psychology, Leadership, and Counseling, 2500 Broadway, Lubbock, TX, 79409, USA
| | - Guriqbal S Nandra
- IV Solution and Ketamine Centers of Chicago and Kansas City, 712 North Dearborn Street, Chicago, IL 60654, USA
| | - Prabhneet Pannu
- IV Solution and Ketamine Centers of Chicago and Kansas City, 712 North Dearborn Street, Chicago, IL 60654, USA
| | - Alan C Swann
- Baylor College of Medicine, Menninger Department of Psychiatry and Behavioral Sciences, 1977 Butler Boulevard, Houston, TX 77030, USA; Michael E. DeBakey VA Medical Center, 2002 Holcombe Boulevard, Houston, TX 77030, USA
| | - Nicholas Murphy
- Baylor College of Medicine, Menninger Department of Psychiatry and Behavioral Sciences, 1977 Butler Boulevard, Houston, TX 77030, USA; The Menninger Clinic, 12301 S Main Street, Houston, TX, 77035, USA
| | - Amanda J F Tamman
- Baylor College of Medicine, Menninger Department of Psychiatry and Behavioral Sciences, 1977 Butler Boulevard, Houston, TX 77030, USA; Michael E. DeBakey VA Medical Center, 2002 Holcombe Boulevard, Houston, TX 77030, USA
| | - Dania Amarneh
- Baylor College of Medicine, Menninger Department of Psychiatry and Behavioral Sciences, 1977 Butler Boulevard, Houston, TX 77030, USA; Michael E. DeBakey VA Medical Center, 2002 Holcombe Boulevard, Houston, TX 77030, USA
| | - Marijn Lijffijt
- Baylor College of Medicine, Menninger Department of Psychiatry and Behavioral Sciences, 1977 Butler Boulevard, Houston, TX 77030, USA; Michael E. DeBakey VA Medical Center, 2002 Holcombe Boulevard, Houston, TX 77030, USA
| | - Lynnette A Averill
- Baylor College of Medicine, Menninger Department of Psychiatry and Behavioral Sciences, 1977 Butler Boulevard, Houston, TX 77030, USA; Michael E. DeBakey VA Medical Center, 2002 Holcombe Boulevard, Houston, TX 77030, USA
| | - Sanjay J Mathew
- Baylor College of Medicine, Menninger Department of Psychiatry and Behavioral Sciences, 1977 Butler Boulevard, Houston, TX 77030, USA; Michael E. DeBakey VA Medical Center, 2002 Holcombe Boulevard, Houston, TX 77030, USA; The Menninger Clinic, 12301 S Main Street, Houston, TX, 77035, USA
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3
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Carneiro de Oliveira PE, Carmona IM, Casarotto M, Silveira LM, Oliveira ACB, Canto-de-Souza A. Mice Cohabiting With Familiar Conspecific in Chronic Stress Condition Exhibit Methamphetamine-Induced Locomotor Sensitization and Augmented Consolation Behavior. Front Behav Neurosci 2022; 16:835717. [PMID: 35517576 PMCID: PMC9062221 DOI: 10.3389/fnbeh.2022.835717] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Accepted: 02/07/2022] [Indexed: 11/13/2022] Open
Abstract
Recognizing and sharing emotions are essential for species survival, but in some cases, living with a conspecific in distress condition may induce negative emotional states through empathy-like processes. Studies have reported that stressors promote psychiatric disorders in both, those who suffer directly and who witness these aversive episodes, principally whether social proximity is involved. However, the mechanisms underlying the harmful outcomes of emotional contagion need more studies, mainly in the drug addiction-related behaviors. Here, we investigated the relevance of familiarity and the effects of cohabitation with a partner submitted to chronic stress in the anxiety-like, locomotor sensitization, and consolation behaviors. Male Swiss mice were housed in pairs during different periods to test the establishment of familiarity and the stress-induced anxiety behavior in the elevated plus maze. Another cohort was housed with a conspecific subjected to repeated restraint stress (1 h/day) for 14 days. During chronic restraint the allogrooming was measured and after the stress period mice were tested in the open field for evaluation of anxiety and locomotor cross-sensitization induced by methamphetamine. We found that familiarity was established after 14 days of cohabitation and the anxiogenic behavior appeared after 14 days of stress. Repeated restraint stress also increased anxiety in the open field test and induced locomotor cross-sensitization in the stressed mice and their cagemates. Cagemates also exhibited an increase in the consolation behavior after stress sessions when compared to control mice. These results indicate that changes in drug abuse-related, consolation, and affective behaviors may be precipitated through emotional contagion in familiar conspecifics.
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Affiliation(s)
| | - Isabela Miranda Carmona
- Psychobiology Group/Department of Psychology/CECH - Federal University of São Carlos, São Carlos, Brazil.,Joint Graduate Program in Physiological Sciences UFSCar/UNESP, Federal University of São Carlos, São Carlos, Brazil
| | - Mariana Casarotto
- Psychobiology Group/Department of Psychology/CECH - Federal University of São Carlos, São Carlos, Brazil
| | - Lara Maria Silveira
- Psychobiology Group/Department of Psychology/CECH - Federal University of São Carlos, São Carlos, Brazil.,Graduate Program in Psychology, Federal University of São Carlos, São Carlos, Brazil
| | - Anna Cecília Bezerra Oliveira
- Psychobiology Group/Department of Psychology/CECH - Federal University of São Carlos, São Carlos, Brazil.,Joint Graduate Program in Physiological Sciences UFSCar/UNESP, Federal University of São Carlos, São Carlos, Brazil
| | - Azair Canto-de-Souza
- Psychobiology Group/Department of Psychology/CECH - Federal University of São Carlos, São Carlos, Brazil.,Joint Graduate Program in Physiological Sciences UFSCar/UNESP, Federal University of São Carlos, São Carlos, Brazil.,Graduate Program in Psychology, Federal University of São Carlos, São Carlos, Brazil.,Neuroscience and Behavioral Institute, Ribeirão Preto, Brazil
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4
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Ketamine attenuates the PTSD-like effect via regulation of glutamatergic signaling in the nucleus accumbens of mice. Mol Cell Neurosci 2022; 120:103723. [PMID: 35351607 DOI: 10.1016/j.mcn.2022.103723] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/28/2022] [Accepted: 03/23/2022] [Indexed: 01/29/2023] Open
Abstract
Post-traumatic stress disorder (PTSD) is a devastating mental illness with high morbidity and major social and economic burden. Currently, there is no promising therapy available for the treatment of PTSD. Some clinical studies showed that ketamine could effectively alleviate PTSD symptoms. However, it is still unclear which brain region ketamine targets and how it attenuates the PTSD-like effects. In this study, we examined the effect of ketamine on fear generalization (a core symptom of PTSD) by using a mice model of fear generalization induced by fear conditioning procedure. Before retrieval, ketamine was locally infused into the nucleus accumbens (a brain region closely associated with PTSD). Fear generalization mice were subjected to behavioral testing and biochemical assessments, following ketamine infusion. The results showed that the foot shock strength-dependently induced fear generalization in mice with increased c-fos activity, and a lower level of GluR1(S845), GluR1(S831) protein, and a higher level of P-GluN2B protein in the nucleus accumbens (NAc). Local infusion of ketamine into NAc decreased the fear generalization together with an increased level of GluR1(S845), GluR1(S831) protein, and decreased level of P-GluN2B protein. Altogether, these results conclude that ketamine might affect the glutamatergic signaling in the NAc to attenuate the fear generalization in mice.
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5
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Zhao T, Gao X, Huang GB. Effects of Chronic Social Defeat Stress on Behavior and Dopamine Receptors in Adolescent Mice With 6-Hydroxydopamine Lesions of the Medial Prefrontal Cortex. Front Behav Neurosci 2021; 15:731373. [PMID: 34912197 PMCID: PMC8667729 DOI: 10.3389/fnbeh.2021.731373] [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: 07/27/2021] [Accepted: 10/20/2021] [Indexed: 11/26/2022] Open
Abstract
Background: Social stress factors in schizophrenia have long-term effects, but will only induce symptoms in a portion of individuals, even if exposed to identical stress. Methods: In the current experiment, we examined mice with 6-hydroxydopamine (6-OHDA)-induced medial prefrontal cortical (mPFC) injury to select for members of a “stress-susceptible group,” and observed the changes in their behavior and the expression of D1 and D2 dopamine receptors in the amygdala and hippocampus. Results: We observed that after chronic social defeat stress, 72.6% of the 6-OHDA lesioned mice exhibited stress response to aggressors, compared to 52.3% of the blank control group. Both the 6-OHDA lesion + social defeat and social defeat groups exhibited anxiety and depression-like behavior. However, social cognitive impairment in the mice from the 6-OHDA lesion + social defeat group was more significant and the D1 expression levels in the amygdala were significantly decreased. Conclusion: These results suggest that the reason that adolescent mice with cortical injury were highly sensitive to defeat stress and had more prominent social cognitive impairment may be the decreased selectivity of D1 in the amygdala.
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Affiliation(s)
- Tong Zhao
- Department of Psychiatry, The Second Affiliated Hospital of Xinxiang Medical University, Xinxiang, China
| | - XiaoLei Gao
- School of Nursing, Xinxiang Medical University, Xinxiang, China
| | - Guang-Biao Huang
- Department of Psychiatry, Huzhou Third Municipal Hospital, The Affiliated Hospital of Huzhou University, Huzhou, China
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6
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Tan SZK, Kim JH. mGlu5: A double-edged sword for aversive learning related therapeutics. NEUROANATOMY AND BEHAVIOUR 2021. [DOI: 10.35430/nab.2021.e16] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Aversive memories underlie many types of anxiety disorders. One area of research to more effectively treat anxiety disorders has therefore been identifying pharmacological targets to affect memory processes. Among these targets, the metabotropic glutamate 5 receptor (mGlu5) has received attention due to the availability of drugs to utilize its role in learning and memory. In this review, we highlight preclinical studies examining the role of mGlu5 at various stages of aversive learning and its inhibition via extinction in order to gain a better understanding of its therapeutic potential. We suggest that mGlu5 has distinct roles at different stages of memory that not only makes it a tricky target, but a double-edged sword as a therapeutic. However, the selective involvement of mGlu5 in different memory stages allows for certain precision that could be harnessed clinically. We therefore suggest potential applications, limitations, and pitfalls when considering use of mGlu5 modulators as therapeutics. In addition, we recommend future studies to address important gaps in this literature, such as sex and age factors in light of anxiety disorders being more prevalent in those demographics.
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Affiliation(s)
- Shawn Zheng Kai Tan
- School of Biomedical Science, Li Ka Shing Faculty of Medicine, The University of Hong Kong
- European Bioinformatics Institute (EMBL-EBI), Wellcome Trust Genome Campus, Cambridgeshire, United Kingdom
| | - Jee Hyun Kim
- IMPACT – the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Deakin University, Geelong, VIC, Australia
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7
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Rudolph ML, Neve RL, Hammer RP, Nikulina EM. Enhanced psychostimulant response, but not social avoidance, depends on GluA1 AMPA receptors in VTA dopamine neurons following intermittent social defeat stress in rats. Eur J Neurosci 2020; 55:2154-2169. [PMID: 32594591 PMCID: PMC9292348 DOI: 10.1111/ejn.14884] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 06/18/2020] [Accepted: 06/19/2020] [Indexed: 12/01/2022]
Abstract
Evidence from both human and animal studies demonstrates the importance of social stress in the development of addiction‐related behaviour. In rats, intermittent social defeat stress causes long‐lasting psychostimulant cross‐sensitization. Our recent data reveal heightened expression of AMPA receptor (AMPAR) GluA1 subunit in rat ventral tegmental area (VTA), which occurs concurrently with social stress‐induced amphetamine (AMPH) cross‐sensitization. In addition, social stress in rats induced social avoidance behaviour. The present study evaluated the effects of intermittent social defeat stress on GluA1 expression in VTA dopamine (DA) neurons, then utilized Cre‐dependent virus‐mediated gene transfer to determine the functional role of homomeric GluA1‐AMPARs in these neurons. Social defeat stress exposure induced GluA1 expression in VTA DA neurons, as demonstrated by a greater density of GluA1/tyrosine hydroxylase (TH) double‐labelling in VTA neurons in stressed rats. Additionally, functional inactivation of VTA GluA1 AMPARs in DA neurons prevented stress‐induced cross‐sensitization, or augmented locomotor response to low dose AMPH challenge (1.0 mg/kg, i.p.), but had no effect on social stress‐induced social avoidance behaviour. Furthermore, wild‐type overexpression of GluA1 in VTA DA neurons had the opposite effect; locomotor‐activating effects of AMPH were significantly augmented, even in the absence of stress. Taken together, these results suggest that stress‐induced GluA1 expression in VTA DA neurons is necessary for psychostimulant cross‐sensitization, but not for social avoidance. This differential effect suggests that different neural pathways are implicated in these behaviours. These findings could lead to novel pharmacotherapies to help prevent stress‐induced susceptibility to substance abuse.
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Affiliation(s)
- Megan L Rudolph
- Department of Basic Medical Sciences, University of Arizona College of Medicine, Phoenix, AZ, USA.,Interdisciplinary Neuroscience Program, Arizona State University, Tempe, AZ, USA
| | - Racheal L Neve
- Gene Delivery Technology Core, Massachusetts General Hospital, Boston, MA, USA
| | - Ronald P Hammer
- Department of Basic Medical Sciences, University of Arizona College of Medicine, Phoenix, AZ, USA.,Interdisciplinary Neuroscience Program, Arizona State University, Tempe, AZ, USA.,Department of Psychiatry, University of Arizona College of Medicine, Phoenix, AZ, USA.,Department of Pharmacology, University of Arizona College of Medicine, Tucson, AZ, USA
| | - Ella M Nikulina
- Department of Basic Medical Sciences, University of Arizona College of Medicine, Phoenix, AZ, USA
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8
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Lijffijt M, Green CE, Balderston N, Iqbal T, Atkinson M, Vo-Le B, Vo-Le B, O’Brien B, Grillon C, Swann AC, Mathew SJ. A Proof-of-Mechanism Study to Test Effects of the NMDA Receptor Antagonist Lanicemine on Behavioral Sensitization in Individuals With Symptoms of PTSD. Front Psychiatry 2019; 10:846. [PMID: 31920733 PMCID: PMC6923195 DOI: 10.3389/fpsyt.2019.00846] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2019] [Accepted: 10/24/2019] [Indexed: 12/21/2022] Open
Abstract
Background: Individuals with post-traumatic stress disorder (PTSD) have a heightened sensitivity to subsequent stressors, addictive drugs, and symptom recurrence, a form of behavioral sensitization. N-methyl-D-aspartate receptors (NMDARs) are involved in the establishment and activation of sensitized behavior. Objective: We describe a protocol of a randomized placebo-controlled Phase 1b proof-of-mechanism trial to examine target engagement, safety, tolerability, and possible efficacy of the NMDAR antagonist lanicemine in individuals with symptoms of PTSD (Clinician Administered PTSD Scale [CAPS-5] score ≥ 25) and evidence of behavioral sensitization measured as enhanced anxiety-potentiated startle (APS; T-score ≥ 2.8). Methods: Subjects (n = 24; age range 21-65) receive three 60-min intravenous infusions of placebo or 100 mg lanicemine over 5 non-consecutive days. Primary endpoint is change in APS from pre-treatment baseline to after the third infusion. NMDAR engagement is probed with resting state EEG gamma band power, 40 Hz auditory steady state response, the mismatch negativity amplitude, and P50 sensory gating. Change in CAPS-5 scores is an exploratory clinical endpoint. Bayesian statistical methods will evaluate endpoints to determine suitability of this agent for further study. Conclusion: In contrast to traditional early-phase trials that use symptom severity to track treatment efficacy, this study tracks engagement of the study drug on expression of behavioral sensitization, a functional mechanism likely to cut across disorders. This experimental therapeutics design is consistent with recent NIMH-industry collaborative studies, and could serve as a template for testing novel pharmacological agents in psychiatry. Clinical Trial Registration: www.ClinicalTrials.gov, identifier NCT03166501.
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Affiliation(s)
- Marijn Lijffijt
- Research Service Line, Michael E. DeBakey VA Medical Center, Houston, TX, United States
- Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Houston, TX, United States
| | - Charles E. Green
- Department of Psychiatry and Behavioral Sciences, UTHealth McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, United States
- Department of Pediatrics - Center for Evidence Based Medicine, UTHealth McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Nicholas Balderston
- Section on Neurobiology of Fear and Anxiety, National Institute of Mental Health, National Institutes of Health, Bethesda, MD, United States
| | - Tabish Iqbal
- Research Service Line, Michael E. DeBakey VA Medical Center, Houston, TX, United States
- Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Houston, TX, United States
| | - Megan Atkinson
- Department of Anesthesiology, Michael E. DeBakey VA Medical Center, Houston, TX, United States
- Department of Anesthesiology, Baylor College of Medicine, Houston, TX, United States
| | - Brittany Vo-Le
- Research Service Line, Michael E. DeBakey VA Medical Center, Houston, TX, United States
- Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Houston, TX, United States
| | - Bylinda Vo-Le
- Research Service Line, Michael E. DeBakey VA Medical Center, Houston, TX, United States
- Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Houston, TX, United States
| | - Brittany O’Brien
- Research Service Line, Michael E. DeBakey VA Medical Center, Houston, TX, United States
- Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Houston, TX, United States
| | - Christian Grillon
- Department of Pediatrics - Center for Evidence Based Medicine, UTHealth McGovern Medical School, University of Texas Health Science Center at Houston, Houston, TX, United States
| | - Alan C. Swann
- Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Houston, TX, United States
- Mental Health Care Line, Michael E. DeBakey VA Medical Center, Houston, TX, United States
| | - Sanjay J. Mathew
- Menninger Department of Psychiatry and Behavioral Sciences, Baylor College of Medicine, Houston, TX, United States
- Mental Health Care Line, Michael E. DeBakey VA Medical Center, Houston, TX, United States
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9
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Bentz AB, Rusch DB, Buechlein A, Rosvall KA. The neurogenomic transition from territory establishment to parenting in a territorial female songbird. BMC Genomics 2019; 20:819. [PMID: 31699031 PMCID: PMC6836416 DOI: 10.1186/s12864-019-6202-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2019] [Accepted: 10/21/2019] [Indexed: 12/15/2022] Open
Abstract
Background The brain plays a critical role in upstream regulation of processes central to mating effort, parental effort, and self-maintenance. For seasonally breeding animals, the brain is likely mediating trade-offs among these processes within a short breeding season, yet research thus far has only explored neurogenomic changes from non-breeding to breeding states or select pathways (e.g., steroids) in male and/or lab-reared animals. Here, we use RNA-seq to explore neural plasticity in three behaviorally relevant neural tissues (ventromedial telencephalon [VmT], hypothalamus [HYPO], and hindbrain [HB]), comparing free-living female tree swallows (Tachycineta bicolor) as they shift from territory establishment to incubation. We additionally highlight changes in aggression-related genes to explore the potential for a neurogenomic shift in the mechanisms regulating aggression, a critical behavior both in establishing and maintaining a territory and in defense of offspring. Results HB had few differentially expressed genes, but VmT and HYPO had hundreds. In particular, VmT had higher expression of genes related to neuroplasticity and processes beneficial for competition during territory establishment, but down-regulated immune processes. HYPO showed signs of high neuroplasticity during incubation, and a decreased potential for glucocorticoid signaling. Expression of aggression-related genes also shifted from steroidal to non-steroidal pathways across the breeding season. Conclusions These patterns suggest trade-offs between enhanced activity and immunity in the VmT and between stress responsiveness and parental care in the HYPO, along with a potential shift in the mechanisms regulating aggression. Collectively, these data highlight important gene regulatory pathways that may underlie behavioral plasticity in females.
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Affiliation(s)
- Alexandra B Bentz
- Department of Biology, Indiana University, Bloomington, IN, 47405, USA. .,Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, IN, 47405, USA.
| | - Douglas B Rusch
- Department of Biology, Indiana University, Bloomington, IN, 47405, USA.,Center for Genomics and Bioinformatics, Indiana University, Bloomington, Indiana, USA
| | - Aaron Buechlein
- Center for Genomics and Bioinformatics, Indiana University, Bloomington, Indiana, USA
| | - Kimberly A Rosvall
- Department of Biology, Indiana University, Bloomington, IN, 47405, USA.,Center for the Integrative Study of Animal Behavior, Indiana University, Bloomington, IN, 47405, USA
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10
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The Impact of Childhood Maltreatment on Intravenous Ketamine Outcomes for Adult Patients with Treatment-Resistant Depression. Pharmaceuticals (Basel) 2019; 12:ph12030133. [PMID: 31514448 PMCID: PMC6789614 DOI: 10.3390/ph12030133] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 09/02/2019] [Accepted: 09/06/2019] [Indexed: 01/04/2023] Open
Abstract
Childhood maltreatment is associated with a poor treatment response to conventional antidepressants and increased risk for treatment-resistant depression (TRD). The N-methyl-D-aspartate receptor (NDMAR) antagonist ketamine has been shown to rapidly improve symptoms of depression in patients with TRD. It is unknown if childhood maltreatment could influence ketamine’s treatment response. We examined the relationship between childhood maltreatment using the Childhood Trauma Questionnaire (CTQ) and treatment response using the Quick Inventory of Depressive Symptoms–Self Report (QIDS-SR) in TRD patients receiving intravenous ketamine at a community outpatient clinic. We evaluated treatment response after a single infusion (n = 115) and a course of repeated infusions (n = 63). Repeated measures general linear models and Bayes factor (BF) showed significant decreases in QIDS-SR after the first and second infusions, which plateaued after the third infusion. Clinically significant childhood sexual abuse, physical abuse, and cumulative clinically significant maltreatment on multiple domains (maltreatment load) were associated with better treatment response to a single and repeated infusions. After repeated infusions, higher load was also associated with a higher remission rate. In contrast to conventional antidepressants, ketamine could be more effective in TRD patients with more childhood trauma burden, perhaps due to ketamine’s proposed ability to block trauma-associated behavioral sensitization.
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Role of N-methyl-D-aspartate receptors in the long-term effects of repeated social defeat stress on the rewarding and psychomotor properties of cocaine in mice. Behav Brain Res 2019; 361:95-103. [DOI: 10.1016/j.bbr.2018.12.025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Revised: 12/09/2018] [Accepted: 12/11/2018] [Indexed: 02/07/2023]
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García‐Pardo MP, Miñarro J, Llansola M, Felipo V, Aguilar MA. Role ofNMDAandAMPAglutamatergic receptors in the effects of social defeat on the rewarding properties ofMDMAin mice. Eur J Neurosci 2018; 50:2623-2634. [DOI: 10.1111/ejn.14190] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Revised: 09/14/2018] [Accepted: 09/20/2018] [Indexed: 12/12/2022]
Affiliation(s)
- M. P. García‐Pardo
- Unidad de Investigación Psicobiología de las Drogodependencias Departamento de Psicobiología Facultad de Psicología Universidad de Valencia Avda. Blasco Ibáñez, 21 46010 Valencia Spain
- Unitat Predepartamental de Medicina Facultat de Ciències de la Salut Universitat Jaume I. Castelló de la Plana Castelló Spain
| | - J. Miñarro
- Unidad de Investigación Psicobiología de las Drogodependencias Departamento de Psicobiología Facultad de Psicología Universidad de Valencia Avda. Blasco Ibáñez, 21 46010 Valencia Spain
| | - M. Llansola
- Laboratory of Neurobiology Centro Investigación Príncipe Felipe Valencia Spain
| | - V. Felipo
- Laboratory of Neurobiology Centro Investigación Príncipe Felipe Valencia Spain
| | - M. A. Aguilar
- Unidad de Investigación Psicobiología de las Drogodependencias Departamento de Psicobiología Facultad de Psicología Universidad de Valencia Avda. Blasco Ibáñez, 21 46010 Valencia Spain
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Newman EL, Leonard MZ, Arena DT, de Almeida RMM, Miczek KA. Social defeat stress and escalation of cocaine and alcohol consumption: Focus on CRF. Neurobiol Stress 2018; 9:151-165. [PMID: 30450381 PMCID: PMC6236516 DOI: 10.1016/j.ynstr.2018.09.007] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 09/10/2018] [Accepted: 09/17/2018] [Indexed: 12/15/2022] Open
Abstract
Both the ostensibly aversive effects of unpredictable episodes of social stress and the intensely rewarding effects of drugs of abuse activate the mesocorticolimbic dopamine systems. Significant neuroadaptations in interacting stress and reward neurocircuitry may underlie the striking connection between stress and substance use disorders. In rodent models, recurring intermittent exposure to social defeat stress appears to produce a distinct profile of neuroadaptations that translates most readily to the repercussions of social stress in humans. In the present review, preclinical rodent models of social defeat stress and subsequent alcohol, cocaine or opioid consumption are discussed with regard to: (1) the temporal pattern of social defeat stress, (2) male and female protocols of social stress-escalated drug consumption, and (3) the neuroplastic effects of social stress, which may contribute to escalated drug-taking. Neuroadaptations in corticotropin-releasing factor (CRF) and CRF modulation of monoamines in the ventral tegmental area and the bed nucleus of the stria terminalis are highlighted as potential mechanisms underlying stress-escalated drug consumption. However, the specific mechanisms that drive CRF-mediated increases in dopamine require additional investigation as do the stress-induced neuroadaptations that may contribute to the development of compulsive patterns of drug-taking.
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Affiliation(s)
- Emily L Newman
- Psychology Dept., Tufts University, Medford, MA, 02155, USA
| | | | | | - Rosa M M de Almeida
- Institute of Psychology, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Klaus A Miczek
- Psychology Dept., Tufts University, Medford, MA, 02155, USA.,Dept. of Neuroscience, Sackler School of Graduate Biomedical Sciences, Boston, MA, 02111, USA
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Shimamoto A. Social Defeat Stress, Sex, and Addiction-Like Behaviors. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2018; 140:271-313. [PMID: 30193707 DOI: 10.1016/bs.irn.2018.07.009] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Social confrontation is a form of social interaction in animals where two conspecific individuals confront each other in dispute over territory, during the formation of hierarchies, and during breeding seasons. Typically, a social confrontation involves a prevailing individual and a yielding individual. The prevailing individual often exhibits aggressive postures and launches attacks, whereas the yielding individual often adopts postures of defeat. The yielding or defeated animals experience a phenomenon known as social defeat stress, in which they show exaggerated stress as well as autonomic and endocrine responses that cause impairment of both the brain and body. In laboratory settings, one can reliably generate social defeat stress by allowing a naïve (or already defeated) animal to intrude into a home cage in which its resident has already established a territory or is nursing. This resident-intruder paradigm has been widely used in both males and females to study mechanisms in the brain that underlie the stress responses. Stress has profound effects on drug reward for cocaine, methamphetamine, alcohol, and opioids. Particularly, previous experiences with social defeat can exaggerate subsequent addiction-like behaviors. The extent of these addiction-like behaviors depends on the intensity, duration, frequency, and intermittency of the confrontation episodes. This chapter describes four types of social defeat stress: acute, repeated, intermittent, and chronic. Specifically, it focuses on social defeat stress models used in laboratories to study individual, sex, and animal strain differences in addiction-like behaviors.
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Affiliation(s)
- Akiko Shimamoto
- Department of Biochemistry, Cancer Biology, Neuroscience, and Pharmacology, Meharry Medical College, Nashville, TN, United States.
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15
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Newman EL, Albrechet-Souza L, Andrew PM, Auld JG, Burk KC, Hwa LS, Zhang EY, DeBold JF, Miczek KA. Persistent escalation of alcohol consumption by mice exposed to brief episodes of social defeat stress: suppression by CRF-R1 antagonism. Psychopharmacology (Berl) 2018; 235:1807-1820. [PMID: 29696309 PMCID: PMC6168197 DOI: 10.1007/s00213-018-4905-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2018] [Accepted: 04/10/2018] [Indexed: 02/07/2023]
Abstract
RATIONALE Episodic bouts of social stress can precede the initiation, escalation, or relapse to disordered alcohol intake. Social stress may engender neuroadaptations in the hypothalamic-pituitary-adrenal (HPA) axis and in extrahypothalamic stress circuitry to promote the escalation of alcohol intake. OBJECTIVES We aimed to (1) confirm a pattern of escalated drinking in socially defeated mice and to (2) test drugs that target distinct aspects of the HPA axis and extrahypothalamic neural substrates for their effectiveness in reducing murine, stress-escalated drinking. METHODS Male C57BL/6J (B6) mice were socially defeated by resident Swiss-derived males for ten consecutive days receiving 30 bites/day. Ten days after the final defeat, cohorts of B6 mice received continuous or intermittent access to 20% EtOH (w/v) and water. After 4 weeks of drinking, mice were injected with weekly, systemic doses of the CRF-R1 antagonist, CP376395; the glucocorticoid receptor antagonist, mifepristone; the 11-beta-hydroxylase inhibitor, metyrapone; or the 5-alpha-reductase inhibitor, finasteride. RESULTS Prior to drug treatments, defeated mice reliably consumed more EtOH than non-defeated controls, and mice given alcohol intermittently consumed more EtOH than those with continuous access. CP376395 (17-30 mg/kg) reduced continuous, but not intermittent EtOH intake (g/kg) in socially defeated mice. Mifepristone (100 mg/kg), however, increased drinking by defeated mice with intermittent access to alcohol while reducing drinking during continuous access. When administered finasteride (100 mg/kg) or metyrapone (50 mg/kg), all mice reduced their EtOH intake while increasing their water consumption. CONCLUSIONS Mice with a history of episodic social defeat stress were selectively sensitive to the effects of CRF-R1 antagonism, suggesting that CRF-R1 may be a potential target for treating alcohol use disorders in individuals who escalate their drinking after exposure to repeated bouts of psychosocial stress. Future studies will clarify how social defeat stress may alter the expression of extrahypothalamic CRF-R1 and glucocorticoid receptors.
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Affiliation(s)
- Emily L Newman
- Psychology Department, Tufts University, Bacon Hall, 530 Boston Avenue, Medford, MA, 02155, USA
| | - Lucas Albrechet-Souza
- Psychology Department, Tufts University, Bacon Hall, 530 Boston Avenue, Medford, MA, 02155, USA
| | - Peter M Andrew
- Psychology Department, Tufts University, Bacon Hall, 530 Boston Avenue, Medford, MA, 02155, USA
| | - John G Auld
- Psychology Department, Tufts University, Bacon Hall, 530 Boston Avenue, Medford, MA, 02155, USA
| | - Kelly C Burk
- Psychology Department, Tufts University, Bacon Hall, 530 Boston Avenue, Medford, MA, 02155, USA
| | - Lara S Hwa
- Psychology Department, Tufts University, Bacon Hall, 530 Boston Avenue, Medford, MA, 02155, USA
| | - Eric Y Zhang
- Psychology Department, Tufts University, Bacon Hall, 530 Boston Avenue, Medford, MA, 02155, USA
| | - Joseph F DeBold
- Psychology Department, Tufts University, Bacon Hall, 530 Boston Avenue, Medford, MA, 02155, USA
| | - Klaus A Miczek
- Psychology Department, Tufts University, Bacon Hall, 530 Boston Avenue, Medford, MA, 02155, USA.
- Department of Neuroscience, Sackler School of Graduate Biomedical Sciences, Boston, MA, 02111, USA.
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Barnes SA, Sheffler DJ, Semenova S, Cosford NDP, Bespalov A. Metabotropic Glutamate Receptor 5 as a Target for the Treatment of Depression and Smoking: Robust Preclinical Data but Inconclusive Clinical Efficacy. Biol Psychiatry 2018; 83:955-962. [PMID: 29628194 PMCID: PMC5953810 DOI: 10.1016/j.biopsych.2018.03.001] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 03/02/2018] [Accepted: 03/05/2018] [Indexed: 12/11/2022]
Abstract
The ability of novel pharmacological compounds to improve outcomes in preclinical models is often not translated into clinical efficacy. Psychiatric disorders do not have biological boundaries, and identifying mechanisms to improve the translational bottleneck between preclinical and clinical research domains is an important and challenging task. Glutamate transmission is disrupted in several neuropsychiatric disorders. Metabotropic glutamate (mGlu) receptors represent a diverse class of receptors that contribute to excitatory neurotransmission. Given the wide, yet region-specific manner of expression, developing pharmacological compounds to modulate mGlu receptor activity provides an opportunity to subtly and selectively modulate excitatory neurotransmission. This review focuses on the potential involvement of mGlu5 receptor disruption in major depressive disorder and substance and/or alcohol use disorders. We provide an overview of the justification of targeting mGlu5 receptors in the treatment of these disorders, summarize the preclinical evidence for negatively modulating mGlu5 receptors as a therapeutic target for major depressive disorders and nicotine dependence, and highlight the outcomes of recent clinical trials. While the evidence of mGlu5 receptor negative allosteric modulation has been promising in preclinical investigations, these beneficial effects have not translated into clinical efficacy. In this review, we identify key challenges that may contribute to poor clinical translation and provide suggested approaches moving forward to potentially improve the translation from preclinical to clinical domains. Such approaches may increase the success of clinical trials and may reduce the translational bottleneck that exists in drug discovery for psychiatric disorders.
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Affiliation(s)
- Samuel A. Barnes
- Department of Psychiatry, University of California San Diego, 9500 Gilman Drive MC 0603, La Jolla, CA 92093, USA
| | - Douglas J. Sheffler
- NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Svetlana Semenova
- Department of Psychiatry, University of California San Diego, 9500 Gilman Drive MC 0603, La Jolla, CA 92093, USA,PAREXEL International, 1560 E Chevy Chase Dr, suite 140, Glendale, CA 91206, USA
| | - Nicholas D. P. Cosford
- NCI-Designated Cancer Center, Sanford Burnham Prebys Medical Discovery Institute, 10901 North Torrey Pines Road, La Jolla, CA, 92037, USA
| | - Anton Bespalov
- EXCIVA, Heidelberg, Germany; Valdman Institute of Pharmacology, Pavlov Medical University, St. Petersburg, Russia.
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Demontis F, Serra F, Serra G. Antidepressant-induced Dopamine Receptor Dysregulation: A Valid Animal Model of Manic-Depressive Illness. Curr Neuropharmacol 2018; 15:417-423. [PMID: 28503114 PMCID: PMC5405612 DOI: 10.2174/1570159x14666160715165648] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2016] [Revised: 03/05/2016] [Accepted: 05/24/2016] [Indexed: 11/22/2022] Open
Abstract
Background: Mania seems to be associated with an increased dopamine (DA) transmission. Antidepressant treatments can induce mania in humans and potentiated DA transmission in animals, by sensitizing DA D2 receptors in the mesolimbic system. We have suggested that the sensitization of D2 receptors may be responsible of antidepressant-induced mania. This review aims to report the experimental evidence that led to the hypothesis that antidepressant-induced DA receptors dysregulation can be considered an animal model of bipolar disorder. Methods: We reviewed papers reporting preclinical and clinical studies on the role of DA in the mechanism of action of antidepressant treatments and in the patho-physiology of mood disorders. Results: A number of preclinical and clinical evidence suggests that mania could be associated with an increased DA activity, while a reduced function of this neurotransmission might underlie depression. Chronic treatment with imipramine induces a sensitization of DA D2 receptors in the mesolimbic system, followed, after drug discontinuation, by a reduced sensitivity associated with an increased immobility time in forced swimming test of depression (FST). Blockade of glutamate NMDA receptors by memantine administration prevents the imipramine effect on DA receptors sensitivity and on the FST. Conclusion: We suggest that chronic treatment with antidepressants induces a behavioural syndrome that mimics mania (the sensitization of DA receptors), followed by depression (desensitization of DA receptors and increased immobility time in the FST), i.e. an animal model of bipolar disorder. Moreover the observation that memantine prevents the “bipolar-like” behavior, suggests that the drug may have an antimanic and mood stabilizing effect. Preliminary clinical observations support this hypothesis.
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Affiliation(s)
- Francesca Demontis
- Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy
| | - Francesca Serra
- Department of General Psychology, University of Padua, Italy
| | - Gino Serra
- Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy
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18
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Macedo GC, Morita GM, Domingues LP, Favoretto CA, Suchecki D, Quadros IMH. Consequences of continuous social defeat stress on anxiety- and depressive-like behaviors and ethanol reward in mice. Horm Behav 2018; 97:154-161. [PMID: 29056427 DOI: 10.1016/j.yhbeh.2017.10.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Revised: 09/14/2017] [Accepted: 10/16/2017] [Indexed: 12/30/2022]
Abstract
This study employed the intruder-resident paradigm to evaluate the effects of continuous social defeat on depressive- and anxiety-like behaviors and the reinforcing and motivational actions of ethanol in male Swiss mice. Male Swiss mice were exposed to a 10-day social defeat protocol, while control mice cohabitated with a non-aggressive animal. Continuous defeat stress consisted of episodes of defeat, followed by 24h or 48h cohabitation with the aggressor until the following defeat. Mice were assessed for sucrose drinking (anhedonia), social investigation test, elevated plus-maze, conditioned place preference to ethanol, and locomotor response to ethanol. Plasma corticosterone was measured prior to, after the first and the final defeat, and 10days after the end of defeat. Defeated mice exhibited a depressive-like phenotype as indicated by social inhibition and reduced sucrose preference, relative to non-defeated controls. Defeated mice also displayed anxiety-like behavior when tested in the elevated plus-maze. Stressed animals failed to present ethanol-induced locomotor stimulation, but showed increased sensitivity for ethanol-induced conditioned place preference. Corticosterone response to defeat was the highest after the first defeat, but was still elevated after the last defeat (day 10) when compared to non-stressed controls. Baseline corticosterone levels were unchanged 10days after the final defeat. These data suggest that social defeat stress increased depressive- and anxiety-like behavior as well increased vulnerability to ethanol reward in mice.
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Affiliation(s)
- Giovana Camila Macedo
- Departamento de Psicobiologia, Universidade Federal de São Paulo, UNIFESP, São Paulo, Brazil
| | - Gleice Midori Morita
- Departamento de Psicobiologia, Universidade Federal de São Paulo, UNIFESP, São Paulo, Brazil
| | - Liz Paola Domingues
- Departamento de Psicobiologia, Universidade Federal de São Paulo, UNIFESP, São Paulo, Brazil
| | | | - Deborah Suchecki
- Departamento de Psicobiologia, Universidade Federal de São Paulo, UNIFESP, São Paulo, Brazil
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Sun H, Su R, Zhang X, Wen J, Yao D, Gao X, Zhu Z, Li H. Hippocampal GR- and CB1-mediated mGluR5 differentially produces susceptibility and resilience to acute and chronic mild stress in rats. Neuroscience 2017. [PMID: 28629846 DOI: 10.1016/j.neuroscience.2017.06.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The molecular mechanism of individual response of susceptibility and resilience under psychological stress remains controversial and unclear. The present study aimed to explore the relationship of metabotropic glutamate receptor 5 (mGluR5) with glucocorticoid receptor (GR) or cannabinoid receptor (CB1) and further indicate the molecular mechanism of susceptibility and resilience to acute stress (AS) and chronic mild stress (CMS). Sucrose preference test and open field test were used to evaluate the response of susceptibility and resilience under stress in rats. The mRNA levels and protein expressions of mGluR5, GR, and CB1 were detected. AS induced a 35% reduction in the sucrose intake of rats, and these rats were considered as susceptible to stress; 21% of the rats showed resilience to the stress. Thirty-three percent of rats in the CMS group showed reduced sucrose water intake and were considered susceptible, while 20% of rats were considered resilient. Hippocampal mGluR5 mRNA and protein levels were increased in the susceptible rats. Pharmacological testing showed that GR was positively associated with mGluR5 in susceptible rats in the CMS group, while CB1 was negatively related to mGluR5 in susceptible rats in the AS group. The results suggested that GR and CB1 in the hippocampus might regulate mGluR5 protein and mRNA levels, which might be related to individual responses of susceptibility and resilience under AS and CMS.
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Affiliation(s)
- Hongli Sun
- Department of Neonatology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 86-710061, PR China; Shaanxi Institute of Pediatric Diseases, Affiliated Children's Hospital of Xi'an Jiaotong University, Xi'an 86-710003, PR China
| | - Rujuan Su
- Department of Oncology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 86-710061, PR China
| | - Xiaoxiao Zhang
- College of Life Sciences, Shaanxi Province Biomedicine Key Laboratory, Northwest University, Shaanxi 86-710069, PR China
| | - Jun Wen
- Department of Neonatology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 86-710061, PR China
| | - Dan Yao
- Department of Neonatology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 86-710061, PR China
| | - Xinru Gao
- Department of Neonatology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 86-710061, PR China
| | - Zhongliang Zhu
- College of Life Sciences, Shaanxi Province Biomedicine Key Laboratory, Northwest University, Shaanxi 86-710069, PR China
| | - Hui Li
- Department of Neonatology, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 86-710061, PR China; Department of Neonatology, Affiliated Children's Hospital of Xi'an Jiaotong University, Xi'an 86-710061, PR China.
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20
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Li MH, Underhill SM, Reed C, Phillips TJ, Amara SG, Ingram SL. Amphetamine and Methamphetamine Increase NMDAR-GluN2B Synaptic Currents in Midbrain Dopamine Neurons. Neuropsychopharmacology 2017; 42:1539-1547. [PMID: 27976681 PMCID: PMC5436114 DOI: 10.1038/npp.2016.278] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2016] [Revised: 11/29/2016] [Accepted: 12/11/2016] [Indexed: 02/07/2023]
Abstract
The psychostimulants amphetamine (AMPH) and methamphetamine (MA) are widely abused illicit drugs. Here we show that both psychostimulants acutely increase NMDA receptor (NMDAR)-mediated synaptic currents and decrease AMPA receptor (AMPAR)/NMDAR ratios in midbrain dopamine neurons. The potentiation depends on the transport of AMPH into the cell by the dopamine transporter. NMDAR-GluN2B receptor inhibitors, ifenprodil, RO 25-6981, and RO 04-5595, inhibit the potentiation without affecting basal-evoked NMDA currents, indicating that NMDAR-GluN2B receptors are activated by AMPH. A selective peptide inhibitor of AMPH-dependent trafficking of the neuronal excitatory amino acid transporter 3 (EAAT3) blocks potentiation, suggesting that EAAT3 internalization increases extracellular glutamate concentrations and activates GluN2B-containing NMDARs. Experiments with the use-dependent NMDAR blocker, MK-801, indicate that potentiated NMDARs reside on the plasma membrane and are not inserted de novo. In behavioral studies, GluN2B inhibitors reduce MA-mediated locomotor activity, without affecting basal activity. These results reveal an important interaction between dopamine and glutamatergic signaling in midbrain dopamine neurons in response to acute administration of psychostimulants.
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Affiliation(s)
- Ming-Hua Li
- Department of Neurological Surgery, Oregon Health & Science University, Portland, OR, USA
| | - Suzanne M Underhill
- National Institute of Mental Health, National Institutes of Health, Laboratory of Molecular and Cellular Neurobiology, Bethesda, MD, USA
| | - Cheryl Reed
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR, USA
| | - Tamara J Phillips
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR, USA,VA Portland Health Care System, Portland, OR, USA
| | - Susan G Amara
- National Institute of Mental Health, National Institutes of Health, Laboratory of Molecular and Cellular Neurobiology, Bethesda, MD, USA
| | - Susan L Ingram
- Department of Neurological Surgery, Oregon Health & Science University, Portland, OR, USA,Department of Neurological Surgery, Oregon Health & Science University (OHSU), 3181 SW Sam Jackson Park Road, Portland, OR 97239, USA, Tel: 503 494 1220, Fax: 503 494 2664, E-mail:
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21
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García-Pardo M, Roger-Sánchez C, Rodríguez-Arias M, Miñarro J, Aguilar M. Cognitive and behavioural effects induced by social stress plus MDMA administration in mice. Behav Brain Res 2017; 319:63-72. [DOI: 10.1016/j.bbr.2016.11.012] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Revised: 10/25/2016] [Accepted: 11/07/2016] [Indexed: 12/22/2022]
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22
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Favoretto CA, Macedo GC, Quadros IMH. Effects of ethanol on social avoidance induced by chronic social defeat stress in mice. Stress 2017; 20:68-74. [PMID: 28068856 DOI: 10.1080/10253890.2017.1280667] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
In rodents, chronic social defeat stress promotes deficits in social interest and social interaction. We further explored these antisocial effects by comparing the consequences of two different defeat stress protocols (episodic vs. continuous stress) in a social investigation test. We expected that continuous, but not episodic, stress would induce social deficits in this model. Furthermore, we tested whether a potentially anxiolytic dose of ethanol reverses social deficits induced by defeat stress. Male Swiss mice were exposed to a 10-day social defeat protocol, using daily confrontations with an aggressive resident mouse. Episodic stress consisted of brief defeat episodes, after which the defeated mouse was returned to its home cage, until the next defeat 24 h later (n = 7-11/group). For continuous stress, similar defeat episodes were followed by cohabitation with the aggressive resident for 24 h, separated by a perforated divider, until the following defeat (n = 8-14/group). Eight days after stress termination, defeated and control mice were assessed in a social investigation test, after treatment with ethanol (1.0 g/kg, i.p.) or 0.9% saline. Considering the time spent investigating a social target, mice exposed to episodic or continuous social stress showed less social investigation than controls (p < .05). Deficits in social interest were not reversed by acute ethanol treatment. However, ethanol reduced time spent in social interaction in one control group (p < .05). Locomotor activity was not affected by social stress or ethanol. Thus, a history of social defeat stress, whether episodic or continuous, promotes deficits in social investigation that were not reversed by acute treatment with ethanol.
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Affiliation(s)
- Cristiane A Favoretto
- a Department of Psychobiology , Universidade Federal de São Paulo, UNIFESP , São Paulo , Brazil
| | - Giovana C Macedo
- a Department of Psychobiology , Universidade Federal de São Paulo, UNIFESP , São Paulo , Brazil
| | - Isabel M H Quadros
- a Department of Psychobiology , Universidade Federal de São Paulo, UNIFESP , São Paulo , Brazil
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Role of dopamine neurotransmission in the long-term effects of repeated social defeat on the conditioned rewarding effects of cocaine. Prog Neuropsychopharmacol Biol Psychiatry 2016; 71:144-54. [PMID: 27476156 DOI: 10.1016/j.pnpbp.2016.07.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Revised: 06/27/2016] [Accepted: 07/23/2016] [Indexed: 02/06/2023]
Abstract
Numerous studies report that social defeat stress alters dopamine (DA) neurotransmission in several areas of the brain. Alterations of the mesolimbic dopaminergic pathway are believed to be responsible for the increased vulnerability to drug use observed as a result of social stress. In the present study, we evaluated the influence of DA receptors on the long-term effect of repeated social defeat (RSD) on the conditioned rewarding and reinstating effects of cocaine. For this purpose, the D1R antagonist SCH 23390 and the D1R antagonist raclopride were administered 30min before each social defeat and a cocaine-induced CPP procedure was initiated three weeks later. The expression of the D1R and D2R was also measured in the cortex and hippocampus throughout the entire procedure. Mice exposed to RSD showed an increase in the conditioned rewarding effects of cocaine that was blocked by both DA receptors antagonists when a subthreshold dose of cocaine was employed. However, while the vulnerability to reinstatement of the preference induced by 25mg/kg cocaine-induced CPP was abolished by the D1R antagonist, it was practically unaffected by raclopride. Increases in D2R receptor levels were observed in the cortex of defeated animals after the first and fourth social defeats and in the hippocampus 3weeks later. Nevertheless, D1R receptor levels in the hippocampus decreased only after the last social defeat. Our results confirm that RSD enhances the conditioned rewarding effects of cocaine and that both DA receptors are involved in this enduring effect of social stress.
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Ferland CL, Reichel CM, McGinty JF. Effects of oxytocin on methamphetamine-seeking exacerbated by predator odor pre-exposure in rats. Psychopharmacology (Berl) 2016; 233:1015-24. [PMID: 26700240 PMCID: PMC5003622 DOI: 10.1007/s00213-015-4184-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2015] [Accepted: 12/03/2015] [Indexed: 01/13/2023]
Abstract
RATIONALE The endogenous oxytocin system has emerged as an inhibitor of drug-seeking and stress in preclinical models. OBJECTIVES The goal of this study was to examine whether systemic oxytocin administration attenuated methamphetamine (METH)-seeking in rats pre-exposed to a predator odor threat. METHODS In Experiment 1, rats were exposed for 5 days to the predator odor, 2,5-dihydro-2,4,5-trimethylthiazoline (TMT), or saline before METH self-administration began. After extinction training, rats were injected with 1 mg/kg, ip oxytocin (OXT) or saline 30 min before a cue-induced reinstatement test followed by re-extinction and a TMT-induced reinstatement test. In Experiment 2, TMT pre-exposure was followed by 10 days of 1 mg/kg OXT or saline injections before METH self-administration, extinction, and a TMT-induced reinstatement test. RESULTS In Experiment 1, TMT pre-exposed rats that were injected with saline 30 min before reinstatement exhibited greater drug-seeking induced by conditioned cues or TMT than that exhibited by saline pre-exposed rats. A single injection of OXT 30 min before reinstatement suppressed METH-seeking in both saline- and TMT pre-exposed rats. In Experiment 2, TMT pre-exposed rats that received saline injections for 10 days prior to METH self-administration exhibited enhanced drug-seeking induced by TMT during stress-induced reinstatement. OXT injections for 10 days prior to METH self-administration blocked only the stress-induced exacerbation of drug-seeking in TMT pre-exposed rats. CONCLUSIONS These results support further research on the development of oxytocin as a novel therapeutic drug that has enduring effects on drug-seeking exacerbated by stress.
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Affiliation(s)
| | | | - Jacqueline F. McGinty
- Correspondence: Jacqueline McGinty, Dept. of Neuroscience, Medical University of South Carolina, 173 Ashley Ave MSC 510, Charleston, SC 29425 USA, Tel: 843-792-9036, Fax: 843-792-4423,
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Korpi ER, den Hollander B, Farooq U, Vashchinkina E, Rajkumar R, Nutt DJ, Hyytiä P, Dawe GS. Mechanisms of Action and Persistent Neuroplasticity by Drugs of Abuse. Pharmacol Rev 2015; 67:872-1004. [DOI: 10.1124/pr.115.010967] [Citation(s) in RCA: 101] [Impact Index Per Article: 11.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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Mesic I, Guzman YF, Guedea AL, Jovasevic V, Corcoran KA, Leaderbrand K, Nishimori K, Contractor A, Radulovic J. Double Dissociation of the Roles of Metabotropic Glutamate Receptor 5 and Oxytocin Receptor in Discrete Social Behaviors. Neuropsychopharmacology 2015; 40:2337-46. [PMID: 25824423 PMCID: PMC4538348 DOI: 10.1038/npp.2015.81] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Revised: 02/23/2015] [Accepted: 03/15/2015] [Indexed: 11/09/2022]
Abstract
Social interactions in vertebrates are complex phenomena based on affective and cognitive processes. Multiple brain regions and neurotransmitter systems are involved in the expression of social behaviors, but their individual roles in specific aspects of social interactions are not well understood. Here we investigated how Gq-protein-coupled metabotropic glutamate receptor 5 (mGluR5) and oxytocin receptor (Oxtr) affect social affiliation and social memory. We used conditional genetic approaches in which the genes coding for these receptors were knocked out in the lateral septum by infusion of recombinant adeno-associated viral vectors containing Cre recombinase (AAV-Cre). Social behavior was assessed 2 weeks later using a three-chamber paradigm for sociability and preference for social novelty. Septal deletion of mGluR5 abolished sociability while leaving preference for social novelty intact. In contrast, deletion of Oxtr did not affect sociability but significantly impaired preference for social novelty. Nonsocial behaviors or memories, including novel object recognition or fear conditioning, were not affected by these genetic manipulations. Immunohistochemical analyses of the distribution of mGluR5 and Oxtr revealed non-overlapping localization of these receptors within the lateral septum, suggesting that not only different neurotransmitters but also different neuronal types contribute to sociability versus preference for social novelty. Our findings identify highly specialized roles of lateral septal mGluR5 and Oxtr in the the regulation of discrete social behaviors, and suggest that deficits in social interactions, which accompany many mental illnesses, would benefit from comprehensive treatments targeting different components of social functioning.
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Affiliation(s)
- Ivana Mesic
- Department of Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA
| | - Yomayra F Guzman
- Department of Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA
| | - Anita L Guedea
- Department of Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA
| | - Vladimir Jovasevic
- Department of Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA
| | - Kevin A Corcoran
- Department of Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA
| | - Katherine Leaderbrand
- Department of Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA
| | - Katsuhiko Nishimori
- Department of Molecular and Cell Biology, Graduate School of Agricultural Science, Tohoku University, Miyagi, Japan
| | - Anis Contractor
- Department of Physiology and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA
| | - Jelena Radulovic
- Department of Psychiatry and Behavioral Sciences, Northwestern University, Feinberg School of Medicine, Chicago, IL, USA,Department of Psychiatry and Behavioral Sciences, Feinberg School of Medicine, Northwestern University, 303 East Chicago Avenue, Ward 13-130, Chicago, IL 60611, USA, Tel: +1 312 503 4627, Fax: +1 312 503 0466, E-mail:
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Yap JJ, Chartoff EH, Holly EN, Potter DN, Carlezon WA, Miczek KA. Social defeat stress-induced sensitization and escalated cocaine self-administration: the role of ERK signaling in the rat ventral tegmental area. Psychopharmacology (Berl) 2015; 232:1555-69. [PMID: 25373870 PMCID: PMC4397167 DOI: 10.1007/s00213-014-3796-7] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 10/21/2014] [Indexed: 01/20/2023]
Abstract
RATIONALE Intermittent social defeat stress can induce neuroadaptations that promote compulsive drug taking. Within the mesocorticolimbic circuit, repeated cocaine administration activates extracellular signal-regulated kinase (ERK). OBJECTIVE The present experiments examine whether changes in ERK phosphorylation are necessary for the behavioral and neural adaptations that occur as a consequence of intermittent defeat stress. MATERIALS AND METHODS Rats were exposed to four brief intermittent defeats over the course of 10 days. Ten days after the last defeat, rats were challenged with cocaine (10 mg/kg, i.p.) or saline, and ERK activity was examined in mesocorticolimbic regions. To determine the role of ERK in defeat stress-induced behavioral sensitization, we bilaterally microinjected the MAPK/ERK kinase inhibitor U0126 (1 μg/side) or vehicle (20 % DMSO) into the ventral tegmental area (VTA) prior to each of four defeats. Ten days following the last defeat, locomotor activity was assessed for the expression of behavioral cross-sensitization to cocaine (10 mg/kg, i.p.). Thereafter, rats self-administered cocaine under fixed and progressive ratio schedules of reinforcement, including a 24-h continuous access "binge" (0.3 mg/kg/infusion). RESULTS We found that repeated defeat stress increased ERK phosphorylation in the VTA. Inhibition of VTA ERK prior to each social defeat attenuated the development of stress-induced sensitization and prevented stress-induced enhancement of cocaine self-administration during a continuous access binge. CONCLUSIONS These results suggest that enhanced activation of ERK in the VTA due to brief defeats is critical in the induction of sensitization and escalated cocaine taking.
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Affiliation(s)
- Jasmine J Yap
- Department of Psychology, Tufts University, Medford, MA, 02155, USA,
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Social stress and escalated drug self-administration in mice I. Alcohol and corticosterone. Psychopharmacology (Berl) 2015; 232:991-1001. [PMID: 25242256 PMCID: PMC4339510 DOI: 10.1007/s00213-014-3733-9] [Citation(s) in RCA: 65] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Accepted: 08/26/2014] [Indexed: 12/20/2022]
Abstract
RATIONALE Stress experiences have been shown to be a risk factor for alcohol abuse in humans; however, a reliable mouse model using episodic social stress has yet to be developed. OBJECTIVES The current studies investigated the effects of mild and moderate social defeat protocols on plasma corticosterone, voluntary alcohol drinking, and motivation to drink alcohol. METHODS Outbred Carworth Farms Webster (CFW) mice were socially defeated for 10 days during which the intruder mouse underwent mild (15 bites: mean = 1.5 min) or moderate (30 bites: mean = 3.8 min) stress. Plasma corticosterone was measured on days 1 and 10 of the defeat. Ethanol drinking during continuous access to alcohol was measured 10 days following the defeat or 10 days prior to, during, and 20 days after the defeat. Motivation to drink was determined using a progressive ratio (PR) operant conditioning schedule during intermittent access to alcohol. RESULTS Plasma corticosterone was elevated in both stress groups on days 1 and 10. Ethanol consumption and preference following moderate stress were higher (13.3 g/kg/day intake) than both the mild stress group (8.0 g/kg/day) and controls (7.4 g/kg/day). Mice with previously acquired ethanol drinking showed decreased alcohol consumption during the moderate stress followed by an increase 20 days post-defeat. Moderately stressed mice also showed escalated ethanol intake and self-administration during a schedule of intermittent access to alcohol. CONCLUSION Social defeat experiences of moderate intensity and duration led to increased ethanol drinking and preference in CFW mice. Ongoing work investigates the interaction between glucocorticoids and dopaminergic systems as neural mechanisms for stress-escalated alcohol consumption.
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Demontis F, Falconi M, Canu D, Serra G. Memantine prevents "bipolar-like" behavior induced by chronic treatment with imipramine in rats. Eur J Pharmacol 2015; 752:49-54. [PMID: 25661848 DOI: 10.1016/j.ejphar.2015.01.041] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 01/11/2015] [Accepted: 01/22/2015] [Indexed: 12/15/2022]
Abstract
A great deal of evidence suggests that virtually all antidepressant treatments induce a dopaminergic behavioral supersensitivity. We have suggested that this effect may play a key role not only in the antidepressant effect of these treatments, but also in their ability to induce a switch from depression to mania. In 2003-4 we found that the sensitization of dopamine receptors induced by imipramine is followed, after imipramine withdrawal, by a desensitization of these receptors associated with a depressive-like behavior assessed in the forced swimming test. The dopamine receptor sensitization can be prevented by MK-801, an NMDA receptor antagonist, but not by currently used mood stabilizers (lithium, carbamazepine, valproate). These observations led us to suggest - and later confirm - with preliminary clinical observations that memantine may have an acute antimanic and a long-lasting mood-stabilizing effect in treatment-resistant bipolar disorder patients. Here we present data showing that memantine prevents not only the dopamine receptor sensitization induced by imipramine, as observed with MK-801, but also the ensuing desensitization and the associated depressive-like behaviorq observed after antidepressant withdrawal.
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Affiliation(s)
| | - Marcella Falconi
- Dipartimento di Scienze Biomediche, Università di Sassari, Italy
| | - Desirèe Canu
- Dipartimento di Scienze Biomediche, Università di Sassari, Italy
| | - Gino Serra
- Dipartimento di Scienze Biomediche, Università di Sassari, Italy.
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Bouwknecht JA. Behavioral studies on anxiety and depression in a drug discovery environment: keys to a successful future. Eur J Pharmacol 2014; 753:158-76. [PMID: 25460021 DOI: 10.1016/j.ejphar.2014.09.051] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2014] [Revised: 08/25/2014] [Accepted: 09/11/2014] [Indexed: 11/18/2022]
Abstract
The review describes a personal journey through 25 years of animal research with a focus on the contribution of rodent models for anxiety and depression to the development of new medicines in a drug discovery environment. Several classic acute models for mood disorders are briefly described as well as chronic stress and disease-induction models. The paper highlights a variety of factors that influence the quality and consistency of behavioral data in a laboratory setting. The importance of meta-analysis techniques for study validation (tolerance interval) and assay sensitivity (Monte Carlo modeling) are demonstrated by examples that use historic data. It is essential for successful discovery of new potential drugs to maintain a high level of control in animal research and to bridge knowledge across in silico modeling, and in vitro and in vivo assays. Today, drug discovery is a highly dynamic environment in search of new types of treatments and new animal models which should be guided by enhanced two-way translation between bench and bed. Although productivity has been disappointing in the search of new and better medicines in psychiatry over the past decades, there has been and will always be an important role for in vivo models in-between preclinical discovery and clinical development. The right balance between good science and proper judgment versus a decent level of innovation, assay development and two-way translation will open the doors to a very bright future.
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Haleem DJ, Ikram H, Haider S, Parveen T, Haleem MA. Enhancement and inhibition of apomorphine-induced sensitization in rats exposed to immobilization stress: Relationship with adaptation to stress. Pharmacol Biochem Behav 2013; 112:22-8. [DOI: 10.1016/j.pbb.2013.09.011] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Revised: 09/06/2013] [Accepted: 09/22/2013] [Indexed: 10/26/2022]
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Burke AR, Forster GL, Novick AM, Roberts CL, Watt MJ. Effects of adolescent social defeat on adult amphetamine-induced locomotion and corticoaccumbal dopamine release in male rats. Neuropharmacology 2013; 67:359-69. [PMID: 23220295 PMCID: PMC3562400 DOI: 10.1016/j.neuropharm.2012.11.013] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2012] [Revised: 11/14/2012] [Accepted: 11/20/2012] [Indexed: 11/22/2022]
Abstract
Maturation of mesocorticolimbic dopamine systems occurs during adolescence, and exposure to social stress during this period results in behavioral dysfunction including substance abuse disorders. Adult male rats exposed to repeated social defeat in adolescence exhibit reduced basal dopamine tissue content in the medial prefrontal cortex, altered dopamine tissue content in corticoaccumbal dopamine regions following acute amphetamine, and increased amphetamine conditioned place preference following repeated amphetamine treatment. Such changes may reflect altered amphetamine-induced extracellular dopamine release in the corticoaccumbal regions. Therefore, we used in vivo microdialysis to measure extracellular dopamine simultaneously within the medial prefrontal cortex and nucleus accumbens core of previously defeated rats and controls, in response to either acute or repeated (7 daily injections) of amphetamine (1.0 mg/kg). Locomotion responses to acute/repeated amphetamine were also assessed the day prior to taking dopamine measurements. Adolescent defeat potentiated adult locomotion responses to acute amphetamine, which was negatively correlated with attenuated amphetamine-induced dopamine release in the medial prefrontal cortex, but there was no difference in amphetamine-induced accumbal dopamine release. However, both locomotion and corticoaccumbal dopamine responses to repeated amphetamine were equivalent between previously defeated rats and controls. These data suggest adolescent defeat enhances behavioral responses to initial amphetamine exposure as a function of diminished prefrontal cortex dopamine activity, which may be sufficient to promote subsequently enhanced seeking of drug-associated cues. Interestingly, repeated amphetamine treatment appears to normalize amphetamine-elicited locomotion and cortical dopamine responses observed in adult rats exposed to adolescent social defeat, providing implications for treating stress-induced dopamine dysfunction.
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Affiliation(s)
- Andrew R. Burke
- Neuroscience Group, Division of Basic Biomedical Sciences, Sanford School of Medicine University of South Dakota, 414 East Clark St., Vermillion, SD, USA 57069
- Department of Psychology, Tufts University, 530 Boston Avenue, Medford, MA, USA 02155
| | - Gina L. Forster
- Neuroscience Group, Division of Basic Biomedical Sciences, Sanford School of Medicine University of South Dakota, 414 East Clark St., Vermillion, SD, USA 57069
| | - Andrew M. Novick
- Neuroscience Group, Division of Basic Biomedical Sciences, Sanford School of Medicine University of South Dakota, 414 East Clark St., Vermillion, SD, USA 57069
| | - Christina L. Roberts
- Neuroscience Group, Division of Basic Biomedical Sciences, Sanford School of Medicine University of South Dakota, 414 East Clark St., Vermillion, SD, USA 57069
| | - Michael J. Watt
- Neuroscience Group, Division of Basic Biomedical Sciences, Sanford School of Medicine University of South Dakota, 414 East Clark St., Vermillion, SD, USA 57069
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Managò F, Lopez S, Oliverio A, Amalric M, Mele A, De Leonibus E. Interaction between the mGlu receptors 5 antagonist, MPEP, and amphetamine on memory and motor functions in mice. Psychopharmacology (Berl) 2013. [PMID: 23192313 DOI: 10.1007/s00213-012-2925-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
RATIONALE Metabotropic glutamate mGlu receptors 5 (mGluR5) receptors are abundant in corticolimbic circuitry where they modulate glutamate and dopamine signal transduction. OBJECTIVES In this study, we explored the hypothesis that mGluR5 antagonist, (2-methyl-6-(phenylethynyl)pyridine hydrochloride) (MPEP), facilitates dopamine-dependent effects on memory and motor functions. METHODS To this aim, we examined the effects of different doses (from 0 to 24 mg/kg) of the mGluR5 antagonist, MPEP, on the modulation of amphetamine-dependent behaviors, namely passive avoidance, locomotor activity, and rotation behavior in intact and dopamine-depleted CD1 male mice. RESULTS We demonstrated that a low dose (3 mg/kg) of MPEP, which is void of behavioral effects on its own, facilitates amphetamine-induced effects independently on the behavior measured both in naïve and in dopamine-lesioned mice; this synergistic effect is lost when higher doses of MPEP are used. CONCLUSION The results are discussed in terms of possible balance between dopamine and glutamate activity in regulating the proper fine tuning of information processing.
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Affiliation(s)
- Francesca Managò
- Dipartimento di Biologia e Biotecnologie "C. Darwin", Università degli Studi di Roma "La Sapienza", Rome, Italy
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Bardo MT, Neisewander JL, Kelly TH. Individual differences and social influences on the neurobehavioral pharmacology of abused drugs. Pharmacol Rev 2013; 65:255-90. [PMID: 23343975 PMCID: PMC3565917 DOI: 10.1124/pr.111.005124] [Citation(s) in RCA: 124] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
The interaction of drugs with biologic targets is a critical area of research, particularly for the development of medications to treat substance use disorders. In addition to understanding these drug-target interactions, however, there is a need to understand more fully the psychosocial influences that moderate these interactions. The first section of this review introduces some examples from human behavioral pharmacology that illustrate the clinical importance of this research. The second section covers preclinical evidence to characterize some of the key individual differences that alter drug sensitivity and abuse vulnerability, related primarily to differences in response to novelty and impulsivity. Evidence is presented to indicate that critical neuropharmacological mechanisms associated with these individual differences involve integrated neurocircuits underlying stress, reward, and behavioral inhibitory processes. The third section covers social influences on drug abuse vulnerability, including effects experienced during infancy, adolescence, and young adulthood, such as maternal separation, housing conditions, and social interactions (defeat, play, and social rank). Some of the same neurocircuits involved in individual differences also are altered by social influences, although the precise neurochemical and cellular mechanisms involved remain to be elucidated fully. Finally, some speculation is offered about the implications of this research for the prevention and treatment of substance abuse.
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Affiliation(s)
- M T Bardo
- Department of Psychology, University of Kentucky, BBSRB Room 447, 741 S. Limestone, Lexington, KY 40536-0509, USA.
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Julio-Pieper M, O'Connor RM, Dinan TG, Cryan JF. Regulation of the brain-gut axis by group III metabotropic glutamate receptors. Eur J Pharmacol 2012; 698:19-30. [PMID: 23123053 DOI: 10.1016/j.ejphar.2012.10.027] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Revised: 10/11/2012] [Accepted: 10/22/2012] [Indexed: 01/14/2023]
Abstract
L-glutamate is produced by a great variety of peripheral tissues in both health and disease. Like other components of the glutamatergic system, metabotropic glutamate (mGlu) receptors also have a widespread distribution outside the central nervous system (CNS). In particular, group III mGlu receptors have been recently found in human stomach and colon revealing an extraordinary potential for these receptors in the treatment of peripheral disorders, including gastrointestinal dysfunction. The significance of these findings is that pharmacological tools originally designed for mGlu receptors in the CNS may also be directed towards new disease targets in the periphery. Targeting mGlu receptors can also be beneficial in the treatment of disorders involving central components together with gastrointestinal dysfunction, such as irritable bowel syndrome, which can be co-morbid with anxiety and depression. Conversely, the development of more specific therapeutic approaches for mGlu ligands both centrally as in the gut will depend on the elucidation of tissue-specific elements in mGlu receptor signalling.
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Affiliation(s)
- Marcela Julio-Pieper
- Instituto de Química, Facultad de Ciencias, Pontificia Universidad Católica de Valparaíso, Av Universidad 330, Curauma, Valparaíso, Chile.
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Boyson CO, Miguel TT, Quadros IM, Debold JF, Miczek KA. Prevention of social stress-escalated cocaine self-administration by CRF-R1 antagonist in the rat VTA. Psychopharmacology (Berl) 2011; 218:257-69. [PMID: 21468623 PMCID: PMC3166547 DOI: 10.1007/s00213-011-2266-8] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2011] [Accepted: 03/11/2011] [Indexed: 01/22/2023]
Abstract
RATIONALE Intermittent exposure to social defeat stress can induce long-term neural plasticity that may influence escalated cocaine-taking behavior. Stressful encounters can lead to activation of dopamine neurons in the ventral tegmental area (VTA), which are modulated by corticotropin releasing factor (CRF) neurons. OBJECTIVE The study aims to prevent the effects of intermittently scheduled, brief social defeat stress on subsequent intravenous (IV) cocaine self-administration by pretreatment with a CRF receptor subtype 1 (CRF-R1) antagonist. MATERIALS AND METHODS Long-Evans rats were submitted to four intermittent social defeat experiences separated by 72 h over 10 days. Two experiments examined systemic or intra-VTA antagonism of CRF-R1 subtype during stress on the later expression of locomotor sensitization and cocaine self-administration during fixed (0.75 mg/kg/infusion) and progressive ratio schedules of reinforcement (0.3 mg/kg/infusion), including a continuous 24-h "binge" (0.3 mg/kg/infusion). RESULTS Pretreatment with a CRF-R1 antagonist, CP 154,526, (20 mg/kg i.p.) prior to each social defeat episode prevented the development of stress-induced locomotor sensitization to a cocaine challenge and prevented escalated cocaine self-administration during a 24-h "binge". In addition, pretreatment with a CRF-R1 antagonist (0.3 μg/0.5 μl/side) into the VTA prior to each social defeat episode prevented stress-induced locomotor sensitization to a cocaine challenge and prevented escalated cocaine self-administration during a 24-h "binge". CONCLUSIONS The current results suggest that CRF-R1 subtype in the VTA is critically involved in the development of stress-induced locomotor sensitization which may contribute to escalated cocaine self-administration during continuous access in a 24-h "binge".
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de Bartolomeis A, Szumlinski KK. Group 1 metabotropic glutamate receptors and schizophrenia. ACTA ACUST UNITED AC 2011. [DOI: 10.1002/wmts.15] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Liu YP, Tung CS, Lin PJ, Wan FJ. N-methyl d-aspartate receptors are involved in the induction, but not expression stage of amphetamine sensitization in schedule-induced polydipsia in rats. Clin Exp Pharmacol Physiol 2010; 37:945-52. [PMID: 20557320 DOI: 10.1111/j.1440-1681.2010.05416.x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
1. The aim of the present study was to examine the role of dopaminergic and glutamatergic receptors on different stages of the amphetamine (AMPH) sensitized effect in schedule-induced polydipsia (SIP) in rats. 2. Three experiments were designed to evaluate the roles of DAD2 receptor antagonist haloperidol (HAL) and glutamatergic N-methyl d-aspartate receptor antagonist MK-801 on both the induction and the expression stage of AMPH sensitization in SIP rats. First, the induction of AMPH sensitization in the SIP model was tested again to confirm previous findings. Second, HAL or MK-801 was co-administered with AMPH on five consecutive days and their effect on induction was examined 14 days after withdrawal. Finally, HAL or MK-801 was co-administered with AMPH on the final day of testing in SIP rats in which AMPH sensitization had been established previously. 3. The present results showed that HAL and MK-801 affected the effect of AMPH differently during the process of sensitization. Whereas HAL influenced the sensitization during both the induction and the expression phases, MK-801 affected only the induction phase; thus, once the sensitization had been established, MK-801 had no further influence. 4. These results suggest that the SIP model could be considered useful for the study of sensitization. In addition, the induction and expression of AMPH sensitization is influenced differently by the dopaminergic and glutamatergic systems.
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Affiliation(s)
- Yia-Ping Liu
- Department of Physiology and Biophysics, National Defense Medical Center, Taipei, Taiwan, China.
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Pitchers KK, Balfour ME, Lehman MN, Richtand NM, Yu L, Coolen LM. Neuroplasticity in the mesolimbic system induced by natural reward and subsequent reward abstinence. Biol Psychiatry 2010; 67:872-9. [PMID: 20015481 PMCID: PMC2854191 DOI: 10.1016/j.biopsych.2009.09.036] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2009] [Revised: 09/23/2009] [Accepted: 09/26/2009] [Indexed: 12/27/2022]
Abstract
BACKGROUND Natural reward and drugs of abuse converge on the mesolimbic system, where drugs of abuse induce neuronal alterations. Here, we tested plasticity in this system after natural reward and the subsequent impact on drug responses. METHODS Effects of sexual experience in male rats on behavioral sensitization and conditioned place preference associated with d-amphetamine (AMPH) and Golgi-impregnated dendrites and spines of nucleus accumbens (NAc) cells were determined. Moreover, the impact of abstinence from sexual behavior in experienced males on these parameters was tested. RESULTS First, repeated sexual behavior induced a sensitized locomotor response to AMPH compared with sexually naive control subjects observed 1, 7, and 28 days after last mating session. Second, sexually experienced animals formed a conditioned place preference for lower doses of AMPH than sexually naive males, indicative of enhanced reward value of AMPH. Finally, Golgi-Cox analysis demonstrated increased numbers of dendrites and spines in the NAc core and shell with sexual experience. The latter two alterations were dependent on a period of abstinence of 7-10 days. CONCLUSIONS Sexual experience induces functional and morphological alterations in the mesolimbic system similar to repeated exposure to psychostimulants. Moreover, abstinence from sexual behavior after repeated mating was essential for increased reward for drugs and dendritic arbors of NAc neurons, suggesting that the loss of sexual reward might also contribute to neuroplasticity of the mesolimbic system. These results suggest that some alterations in the mesolimbic system are common for natural and drug reward and might play a role in general reinforcement.
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Affiliation(s)
- Kyle K. Pitchers
- Department of Anatomy & Cell Biology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada, N6A 5C1
| | | | - Michael N. Lehman
- Department of Anatomy & Cell Biology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada, N6A 5C1
| | - Neil M. Richtand
- Neuroscience Graduate Program, University of Cincinnati, Cincinnati, Ohio
- Department of Psychiatry, University of Cincinnati, Cincinnati, Ohio
- Psychiatry Service, Cincinnati Veterans Affairs Medical Center
| | - Lei Yu
- Neuroscience Graduate Program, University of Cincinnati, Cincinnati, Ohio
| | - Lique M. Coolen
- Department of Anatomy & Cell Biology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada, N6A 5C1
- Department of Physiology & Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada, N6A 5C1
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Cocaine-mediated synaptic potentiation is absent in VTA neurons from mGlu5-deficient mice. Int J Neuropsychopharmacol 2010; 13:133-41. [PMID: 19545477 DOI: 10.1017/s1461145709990162] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Drugs of abuse have the ability to instantiate plastic adaptations within the central nervous system, and this property may relate to the development and persistence of addiction. In this context, a single exposure to cocaine in rodents may induce synaptic plasticity by increasing the AMPA/NMDA receptor excitatory post-synaptic current (EPSC) amplitude ratio in dopaminergic cells of the ventral tegmental area (VTA). Here, we examine the role of the metabotropic glutamate 5 (mGlu5) receptor in this regard using a genetic mouse model. The control AMPA/NMDA EPSC ratio is reduced in mGlu5-deficient mice compared to wild-types. Moreover, cocaine-induced enhancement of this EPSC ratio is also absent in mutant mice, which suggests that mGlu5 receptors are required for single-dose cocaine-induced plasticity onto VTA cells. While the temporal profile of hyperactivity to acute cocaine is altered in mGlu5-deficient mice; these mice still develop and express sensitized psychomotor responses to cocaine. These data suggest that the mGlu5 receptor is required for cocaine-induced plasticity in VTA dopaminergic cells. In contrast, the mGlu5 receptor may not be essential for psychostimulant behavioural sensitization; although it probably impacts other aspects drug addiction, such as motivation to self-administer.
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41
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Miczek KA, Yap JJ, Covington HE. Social stress, therapeutics and drug abuse: preclinical models of escalated and depressed intake. Pharmacol Ther 2008; 120:102-28. [PMID: 18789966 PMCID: PMC2713609 DOI: 10.1016/j.pharmthera.2008.07.006] [Citation(s) in RCA: 263] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2008] [Accepted: 07/21/2008] [Indexed: 12/16/2022]
Abstract
The impact of ostensibly aversive social stresses on triggering, amplifying and prolonging intensely rewarding drug taking is an apparent contradiction in need of resolution. Social stress encompasses various types of significant life events ranging from maternal separation stress, brief episodes of social confrontations in adolescence and adulthood, to continuous subordination stress, each with its own behavioral and physiological profile. The neural circuit comprising the VTA-accumbens-PFC-amygdala is activated by brief episodes of social stress, which is critical for the DA-mediated behavioral sensitization and increased stimulant consumption. A second neural circuit comprising the raphe-PFC-hippocampus is activated by continuous subordination stress and other types of uncontrollable stress. In terms of the development of therapeutics, brief maternal separation stress has proven useful in characterizing compounds acting on subtypes of GABA, glutamate, serotonin and opioid receptors with anxiolytic potential. While large increases in alcohol and cocaine intake during adulthood have been seen after prolonged maternal separation experiences during the first two weeks of rodent life, these effects may be modulated by additional yet to be identified factors. Brief episodes of defeat stress can engender behavioral sensitization that is relevant to escalated and prolonged self-administration of stimulants and possibly opioids, whereas continuous subordination stress leads to anhedonia-like effects. Understanding the intracellular cascade of events for the transition from episodic to continuous social stress in infancy and adulthood may provide insight into the modulation of basic reward processes that are critical for addictive and affective disorders.
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Affiliation(s)
- Klaus A Miczek
- Departments of Psychology, Psychiatry, Pharmacology and Neuroscience, Tufts University, Medford and Boston, MA 02155, United States.
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42
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Platt DM, Rowlett JK, Spealman RD. Attenuation of cocaine self-administration in squirrel monkeys following repeated administration of the mGluR5 antagonist MPEP: comparison with dizocilpine. Psychopharmacology (Berl) 2008; 200:167-76. [PMID: 18509621 PMCID: PMC2536745 DOI: 10.1007/s00213-008-1191-y] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/28/2007] [Accepted: 04/26/2008] [Indexed: 10/22/2022]
Abstract
RATIONALE The mGluR5 antagonist MPEP has effects that suggest potential as a pharmacotherapy for cocaine addiction. MPEP can attenuate self-administration of cocaine in animals; however, studies usually involved only acute treatment with MPEP and a single dose of self-administered cocaine. Cocaine addicts use varied amounts of cocaine over long periods of time, and an effective pharmacotherapy would almost certainly require more chronic treatment. OBJECTIVES The present study (1) compared the effects of repeated treatment with MPEP or the NMDA receptor antagonist dizocilpine on the reinforcing effects of a range of doses of cocaine and (2) determined the pharmacological specificity of the effects of the drugs in attenuating cocaine self-administration compared to food-reinforced behavior. An effective pharmacotherapy should selectively reduce cocaine self-administration. MATERIALS AND METHODS Groups of monkeys responded under a fixed-ratio schedule of i.v. cocaine self-administration or food-pellet delivery. The effects of daily treatment with MPEP and dizocilpine were determined under both the schedule of i.v. cocaine injection and food delivery. RESULTS Treatment with MPEP and dizocilpine significantly reduced cocaine self-administration, producing rightward and downward shifts in the ascending limb of the cocaine dose-response function. MPEP and dizocilpine selectively and significantly attenuated self-administration of a low reinforcing dose of cocaine compared to food without evidence of tolerance. CONCLUSIONS Both MPEP and dizocilpine functioned as partially surmountable antagonists of the reinforcing effects of cocaine. The similar effects of the two drugs raises the possibility that MPEP attenuated the reinforcing effects of cocaine, at least in part, via mGluR5-mediated inhibition of NMDA receptor activity.
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Affiliation(s)
- Donna M Platt
- New England Primate Research Center, Harvard Medical School, One Pine Hill Drive, P.O. Box 9102, Southborough, MA 01772-9102, USA.
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43
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Mathews IZ, Mills RG, McCormick CM. Chronic social stress in adolescence influenced both amphetamine conditioned place preference and locomotor sensitization. Dev Psychobiol 2008; 50:451-9. [PMID: 18551462 DOI: 10.1002/dev.20299] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
We previously reported that chronic social stress (SS) in adolescence, but not in adulthood, increased the locomotor-activating effects of nicotine in females, and not males, when tested in adulthood. However, SS rats had decreased locomotor response to nicotine when tested in adolescence. Here, we investigated age-related changes in the effects of SS on both conditioned place preference (CPP) and locomotor sensitization to amphetamine. In the CPP experiment, SS females tested in adolescence had increased preference for the 1.0 mg/kg dose of amphetamine, whereas SS rats of both sexes showed a decrease in CPP for the 0.5 mg/kg dose when tested as adults. Irrespective of time of testing, SS males and females had enhanced locomotor sensitization compared to controls. Thus, adolescent SS produced both immediate and enduring effects on behavioral responses to amphetamine, likely by altering the development of the mesocorticolimbic dopamine system, which holds implications for vulnerability to addiction.
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Affiliation(s)
- I Z Mathews
- Department of Psychology, Brock University, 500 Glenridge Ave, St. Catharines, ON, Canada
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Covington HE, Tropea TF, Rajadhyaksha AM, Kosofsky BE, Miczek KA. NMDA receptors in the rat VTA: a critical site for social stress to intensify cocaine taking. Psychopharmacology (Berl) 2008; 197:203-16. [PMID: 18097654 PMCID: PMC2664317 DOI: 10.1007/s00213-007-1024-4] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2007] [Accepted: 11/13/2007] [Indexed: 01/11/2023]
Abstract
RATIONALE Cocaine strengthens behaviors associated with its administration. The stress response by individuals that are defeated in a brief aggressive confrontation can also promote enduring behavioral consequences similar to those of stimulants. OBJECTIVES The study intends to find whether intermittent episodes of defeat promote cocaine's reinforcing effects by triggering N-methyl-D: -aspartic acid (NMDA)-receptor-mediated plasticity in the ventral tegmental area (VTA). MATERIALS AND METHODS Long-Evans rats were investigated after four social defeats in three experiments. Two experiments examined systemic or intra-VTA antagonism of NMDA receptors during stress on the later expression of behavioral sensitization and cocaine self-administration during fixed and progressive ratio (PR) schedules of reinforcement (0.3 mg/kg/infusion), including a novel 24-h variable-dose continuous access binge (0.2, 0.4, and 0.8 mg/kg/infusion, delivered in an irregular sequence). Third, the expression of receptor proteins NR1 (NMDA) and GluR1 [alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid (AMPA)] were examined in VTA and nucleus accumbens. RESULTS Intermittent defeats augment locomotor responses to cocaine and increase cocaine taking. Rates of responding during binges are increased after defeat stress. These effects are prevented when NMDA or AMPA receptor antagonists are administered before defeats. VTA infusions of the NMDA antagonist AP-5 (5 nmol/side) before stress prevents locomotor sensitization to cocaine and intensified responding for cocaine during a PR schedule or binge. Episodic defeats increase GluR1 AMPA subunit protein expression in the VTA. CONCLUSIONS Social stress stimulates NMDA receptors in the VTA, and this neural action of defeat may be essential for prompting a later increase in cocaine intake during binges.
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Yap JJ, Miczek KA. Stress and Rodent Models of Drug Addiction: Role of VTA-Accumbens-PFC-Amygdala Circuit. DRUG DISCOVERY TODAY. DISEASE MODELS 2008; 5:259-270. [PMID: 20016773 PMCID: PMC2794209 DOI: 10.1016/j.ddmod.2009.03.010] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Stress can trigger, intensify, and prolong drug consumption, as well as reinstate previously extinguished drug-taking behavior by directly impacting a neural circuit often referred to as a reward pathways. Animal models of drug abuse have been used to understand these neural circuits mediating stress-induced drug intake and relapse through examination of cellular and subcellular molecular mechanisms. Several types of intermittent stressors have been shown to induce cross-sensitization to psychomotor stimulants, enhance conditioned place preference under most conditions, increase self-administration of cocaine and amphetamine and induce reinstatement of heroin and cocaine seeking via activation of the mesocorticolimbic dopamine system.
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Affiliation(s)
- Jasmine J Yap
- Department of Psychology, Tufts University, 530 Boston Ave., Medford, MA 02155
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46
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Fee JR, Sparta DR, Picker MJ, Thiele TE. Corticotropin releasing factor-1 receptor antagonist, CP-154,526, blocks the expression of ethanol-induced behavioral sensitization in DBA/2J mice. Neuroscience 2007; 150:14-21. [PMID: 17919825 DOI: 10.1016/j.neuroscience.2007.08.027] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2007] [Revised: 08/01/2007] [Accepted: 09/02/2007] [Indexed: 10/22/2022]
Abstract
RATIONALE Manipulation of glucocorticoid receptor signaling has been shown to alter the acquisition and expression of ethanol-induced locomotor sensitization in mice. It is unknown if other components of the hypothalamic-pituitary-adrenal (HPA)-axis modulate locomotor sensitization resulting from repeated ethanol administration. In the present investigation, we determined if pretreatment with an i.p. injection of CP-154,526, a selective corticotropin releasing factor (CRF) type-1 receptor antagonist, would block the acquisition and/or expression of ethanol-induced locomotor sensitization in male DBA/2J mice. METHODS To assess the role of the CRF1 receptor in the acquisition of behavioral sensitization, mice were pretreated with an i.p. injection of CP-154,526 30 min before each of 10 sensitizing i.p. injections of ethanol. To determine the role of the CRF1 receptor in modulating the expression of ethanol-induced sensitization, mice that had previously been sensitized to the locomotor stimulant effects of ethanol were pretreated with CP-154,526 30 min before an i.p. injection of ethanol on the test day. In a third study, ethanol-naïve mice were pretreated with CP-154,526 30 min before an initial i.p. injection of ethanol to determine the combined effects of the CRF1 receptor antagonist and ethanol on locomotor activity. Blood ethanol concentrations were assessed at the termination of sensitization studies. RESULTS Pretreatment with CP-154,526 blocked the expression of ethanol-induced locomotor sensitization in DBA/2J mice but did not prevent the acquisition of sensitization. The ability of CP-154,526 to block the expression of ethanol-induced locomotor sensitization was not attributable to alterations in blood ethanol levels or possible sedative effects produced by the combined administration of CP-154,526 and ethanol. CONCLUSIONS These data provide novel evidence that CRF1 receptor signaling modulates the expression of ethanol-induced locomotor sensitization, and add to a growing literature suggesting a role for neurochemicals and hormones associated with the HPA-axis in behavioral sensitization resulting from repeated exposure to drugs of abuse.
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Affiliation(s)
- J R Fee
- Department of Psychology, University of North Carolina, Davie Hall, CB# 3270, Chapel Hill, NC 27599-3270, USA
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Yap JJ, Miczek KA. Social defeat stress, sensitization, and intravenous cocaine self-administration in mice. Psychopharmacology (Berl) 2007; 192:261-73. [PMID: 17297635 DOI: 10.1007/s00213-007-0712-4] [Citation(s) in RCA: 49] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2006] [Accepted: 01/13/2007] [Indexed: 11/25/2022]
Abstract
RATIONALE Behavioral sensitization has been proposed as a process that is important in compulsive drug use and in psychotic disorders. OBJECTIVE The present experiments examine the relationship between behavioral sensitization, induced by either social defeat or amphetamine, and intravenous cocaine self-administration in mice. MATERIALS AND METHODS Male CFW mice were exposed either to defeat experiences, amphetamine (2.5 mg/kg, i.p.) or saline (i.p.) every day for 10 days. Ten days after the last defeat or injection, mice were challenged with varying doses of amphetamine (1.0-2.5 mg/kg i.p). Mice were then trained to nose poke for intravenous cocaine (1.0 mg/kg/inf) during daily 3-h sessions. Following this acquisition phase, the animals self-administered varying doses of cocaine (0.3-1.8 mg/kg/inf) or were allowed to self-administer cocaine (0.3 mg/kg/inf) according to a progressive ratio schedule of reinforcement. RESULTS Repeated social defeat produced a sensitized motor response to a single challenge of 1.5 mg/kg amphetamine and to a cumulative dosing of amphetamine. Amphetamine-pretreated mice exhibited increased cocaine self-administration during acquisition and elevated break points during performance on a progressive ratio schedule of reinforcement relative to stress-sensitized and control animals. CONCLUSIONS These data extend the evidence from rats to mice for the process of sensitization leading to more cocaine taking. Contrary to what is seen in rats, increased levels of cocaine self-administration were seen only in the amphetamine-pretreated mice and not after repeated defeat stress, suggesting that the sensitized response to defeat stress may not be as robust as it is in rats in this particular strain of mice.
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Affiliation(s)
- Jasmine J Yap
- Department of Psychology, Tufts University, Medford, MA 02155, USA.
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Maldonado C, Rodríguez-Arias M, Castillo A, Aguilar MA, Miñarro J. Effect of memantine and CNQX in the acquisition, expression and reinstatement of cocaine-induced conditioned place preference. Prog Neuropsychopharmacol Biol Psychiatry 2007; 31:932-9. [PMID: 17395352 DOI: 10.1016/j.pnpbp.2007.02.012] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/27/2006] [Revised: 02/05/2007] [Accepted: 02/22/2007] [Indexed: 10/23/2022]
Abstract
The present study evaluates the effect of memantine, a non-competitive N-methyl-d-aspartate (NMDA) glutamate receptor antagonist and CNQX, an alpha-amino-3-hydroxy-5-methylisoxazole-4-propionic acid (AMPA)/kainate receptor antagonist on the rewarding effects of cocaine in mice, using the conditioned place preference (CPP) paradigm. Cocaine-induced CPP was studied pairing this drug with different memantine or CNQX doses during either the acquisition or the expression phase of the procedure. Once CPP was established, and the preference extinguished, reinstatement was induced by a priming dose of cocaine. Both antagonists, which in themselves do not present motivational actions on the preference shown by the animals, abolished the acquisition and expression of the cocaine-induced CPP. Neither of the antagonists precipitated reinstatement of the preference induced by cocaine but memantine blocked the cocaine-primed reinstatement. Our results suggest that cocaine-induced CPP and reinstatement is largely dependent on glutamate neurotransmission, and confer a putative role for memantine among the tools useful for cocaine management and treatment.
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Affiliation(s)
- C Maldonado
- Unidad de Investigación Psicobiología de las Drogodependencias, Departamento de Psicobiología, Facultad de Psicología, Universitat de Valencia, Avda. Blasco Ibáñez 21, 46010 Valencia, Spain
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Cantor C, Price J. Traumatic entrapment, appeasement and complex post-traumatic stress disorder: evolutionary perspectives of hostage reactions, domestic abuse and the Stockholm syndrome. Aust N Z J Psychiatry 2007; 41:377-84. [PMID: 17464728 DOI: 10.1080/00048670701261178] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Evolutionary theory and cross-species comparisons are explored to shed new insights into behavioural responses to traumatic entrapment, examining their relationships to the Stockholm syndrome (a specific response to traumatic entrapment) and complex post-traumatic stress disorder (PTSD). A selective literature review is undertaken examining responses to traumatic entrapment (including hostage, domestic abuse and similar situations) and the Stockholm syndrome, before examining mammalian, reptilian and other defensive responses to relevant threats. Chimpanzees, the closest relatives of humans, are closely examined from this perspective and commonalities in behavioural responses are highlighted. The neurobiological basis of defensive behaviours underlying PTSD is explored with reference to the triune brain model. Victims of protracted traumatic entrapment under certain circumstances may display the Stockholm syndrome, which involves paradoxically positive relationships with their oppressors that may persist beyond release. Similar responses are observed in many mammalian species, especially primates. Ethological concepts including dominance hierarchies, reverted escape, de-escalation and conditional reconciliation appear relevant and are illustrated. These phenomena are commonly encountered in victims of severe abuse and understanding these concepts may assist clinical management. Appeasement is the mammalian defence most relevant to the survival challenge presented by traumatic entrapment and appears to be the foundation of complex PTSD. Evolutionary perspectives have considerable potential to bridge and integrate neurobiology and the social sciences with respect to traumatic stress responses.
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Affiliation(s)
- Chris Cantor
- Department of Psychiatry, University of Queensland, PO Box 1216, Noosa Heads, Qld 4567, Australia.
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Pacchioni AM, Cador M, Bregonzio C, Cancela LM. A glutamate-dopamine interaction in the persistent enhanced response to amphetamine in nucleus accumbens core but not shell following a single restraint stress. Neuropsychopharmacology 2007; 32:682-92. [PMID: 16641941 DOI: 10.1038/sj.npp.1301080] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The administration of psychostimulant drugs or stress can elicit a sensitized response to the stimulating and reinforcing properties of the drug. We previously demonstrated that a single restraint stress session enhanced d-amphetamine (d-AMPH)-induced locomotion the day after the stress session, which lasted up to 8 days. The present experiments were designed to identify the contribution of major dopamine (DA) brain areas in the short- and long-lasting enhancement of d-AMPH-induced locomotion following a single stress, and to test the involvement of N-methyl-D-aspartate (NMDA) receptors in that phenomena. To achieve our goal, 24 h and 8 days after a 2-h restraint stress session either with or without a NMDA receptor blockade, we measured locomotor activity and DA overflow in nucleus accumbens (NAcc) core and shell and caudate putamen (CPu) following a d-AMPH injection (0.5 mg/kg i.p.). The stimulant effect of d-AMPH on DA overflow was enhanced in all nuclei at 24 h after a single stress, while at 8 days the enhanced responsiveness was maintained only in the NAcc core. When the rats were administered with MK-801 (0.1 mg/kg i.p.) 30 min before restraint stress, the d-AMPH-induced enhancement on locomotor activity and DA neurotransmission was prevented in all studied brain areas at both times. These findings show that a glutamate-dopamine link is underlying the short- and long- term d-AMPH-induced enhancement on DA and locomotor activity following stress. The persistent glutamate-dependent DA enhancement in NAcc core highlights the relevance of this region in the long-term proactive effects of stress on vulnerability to drug abuse.
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Affiliation(s)
- Alejandra M Pacchioni
- Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
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