1
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Reinhardt PR, Theis CDC, Juckel G, Freund N. Rodent models for mood disorders - understanding molecular changes by investigating social behavior. Biol Chem 2023; 404:939-950. [PMID: 37632729 DOI: 10.1515/hsz-2023-0190] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Accepted: 08/14/2023] [Indexed: 08/28/2023]
Abstract
Mood disorders, including depressive and bipolar disorders, are the group of psychiatric disorders with the highest prevalence and disease burden. However, their pathophysiology remains poorly understood. Animal models are an extremely useful tool for the investigation of molecular mechanisms underlying these disorders. For psychiatric symptom assessment in animals, a meaningful behavioral phenotype is needed. Social behaviors constitute naturally occurring complex behaviors in rodents and can therefore serve as such a phenotype, contributing to insights into disorder related molecular changes. In this narrative review, we give a fundamental overview of social behaviors in laboratory rodents, as well as their underlying neuronal mechanisms and their assessment. Relevant behavioral and molecular changes in models for mood disorders are presented and an outlook on promising future directions is given.
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Affiliation(s)
- Patrick R Reinhardt
- Division of Experimental and Molecular Psychiatry, Department of Psychiatry, Psychotherapy and Preventive Medicine, LWL-University Hospital, Ruhr-University Bochum, D-44791 Bochum, Germany
- International Graduate School of Neuroscience, Ruhr-University Bochum, D-44801 Bochum, Germany
| | - Candy D C Theis
- Division of Experimental and Molecular Psychiatry, Department of Psychiatry, Psychotherapy and Preventive Medicine, LWL-University Hospital, Ruhr-University Bochum, D-44791 Bochum, Germany
| | - Georg Juckel
- Division of Experimental and Molecular Psychiatry, Department of Psychiatry, Psychotherapy and Preventive Medicine, LWL-University Hospital, Ruhr-University Bochum, D-44791 Bochum, Germany
| | - Nadja Freund
- Division of Experimental and Molecular Psychiatry, Department of Psychiatry, Psychotherapy and Preventive Medicine, LWL-University Hospital, Ruhr-University Bochum, D-44791 Bochum, Germany
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2
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Bailey AM, Barrett A, Havens L, Leyder E, Merchant T, Starnes H, Thompson SM. Changes in social, sexual, and hedonic behaviors in rats in response to stress and restoration by a negative allosteric modulator of α5-subunit containing GABA receptor. Behav Brain Res 2023; 452:114554. [PMID: 37356670 PMCID: PMC10528636 DOI: 10.1016/j.bbr.2023.114554] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2022] [Revised: 06/07/2023] [Accepted: 06/21/2023] [Indexed: 06/27/2023]
Abstract
Major depressive disorder (MDD) is a debilitating and costly human condition. Treatment for MDD relies heavily on the use of antidepressants that are slow to produce mood-related changes and are not effective in all patients, such as selective serotonin reuptake inhibitors (SSRIs). Several novel compounds, including negative allosteric modulators of GABA-A receptors containing the α5-subunit (GABA-NAMs), are under investigation for potential fast acting therapeutic use in MDD. Preclinical evidence that these compounds produce a rapid antidepressant-like response comes primarily from simple tests of escape behavior and preference for rewarding stimuli after chronic stress. To increase the ethological relevance of these compounds, we tested the hypothesis that the GABA-NAM, L-655,708, would produce an antidepressant-like response in more complex stress-sensitive social and sex behaviors, which are of relevance to the symptoms of human depression. In male rats subjected to chronic restraint stress, injection of L-655,708 increased reward in a sexual conditioned place preference task, increased male sexual activity with a receptive female, and re-established male social dominance hierarchies within 24 h. We also report increased sucrose preference in the social defeat stress (SDS) model of depression following GABA-NAM administration, demonstrating that its antidepressant-like actions are independent of the type of chronic stress administered. This work extends the impact of GABA-NAMs beyond traditional tests of anhedonia and further supports the development of alpha5 subunit-selective GABA-NAMs as a potential fast-acting therapeutic approach for treating human MDD.
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Affiliation(s)
- Aileen M Bailey
- Department of Psychology, St. Mary's College of Maryland, St. Mary's City, MD, United States.
| | - Allison Barrett
- Department of Psychology, St. Mary's College of Maryland, St. Mary's City, MD, United States
| | - Lane Havens
- Department of Psychology, St. Mary's College of Maryland, St. Mary's City, MD, United States
| | - Erica Leyder
- Department of Psychology, St. Mary's College of Maryland, St. Mary's City, MD, United States
| | - Taylor Merchant
- Department of Psychology, St. Mary's College of Maryland, St. Mary's City, MD, United States
| | - Hannah Starnes
- Department of Psychology, St. Mary's College of Maryland, St. Mary's City, MD, United States
| | - Scott M Thompson
- Department of Physiology, University of Maryland School of Medicine, Baltimore, MD, United States; Department of Psychiatry, University of Colorado School of Medicine, Aurora, CO, United States
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Kogan NM, Begmatova D, Vinnikova L, Malitsky S, Itkin M, Sharon E, Klinov A, Gorelick J, Koman I, Vogel Z, Mechoulam R, Pinhasov A. Endocannabinoid basis of personality-Insights from animal model of social behavior. Front Pharmacol 2023; 14:1234332. [PMID: 37663250 PMCID: PMC10468576 DOI: 10.3389/fphar.2023.1234332] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Accepted: 07/31/2023] [Indexed: 09/05/2023] Open
Abstract
Rationale: The endocannabinoid system is known to be involved in learning, memory, emotional processing and regulation of personality patterns. Here we assessed the endocannabinoid profile in the brains of mice with strong characteristics of social dominance and submissiveness. Methods: A lipidomics approach was employed to assess the endocannabinoidome in the brains of Dominant (Dom) and Submissive (Sub) mice. The endocannabinoid showing the greatest difference in concentration in the brain between the groups, docosatetraenoyl ethanolamine (DEA), was synthesized, and its effects on the physiological and behavioral responses of Dom and Sub mice were evaluated. mRNA expression of the endocannabinoid receptors and enzymes involved in PUFA biosynthesis was assessed using qRT-PCR. Results: Targeted LC/MS analysis revealed that long-chain polyunsaturated ethanolamides including arachidonoyl ethanolamide (AEA), DEA, docosatrienoyl ethanolamide (DTEA), eicosatrienoyl ethanolamide (ETEA), eicosapentaenoyl ethanolamide (EPEA) and docosahexaenoyl ethanolamide (DHEA) were higher in the Sub compared with the Dom mice. Untargeted LC/MS analysis showed that the parent fatty acids, docosatetraenoic (DA) and eicosapentaenoic (EPA), were higher in Sub vs. Dom. Gene expression analysis revealed increased mRNA expression of genes encoding the desaturase FADS2 and the elongase ELOVL5 in Sub mice compared with Dom mice. Acute DEA administration at the dose of 15 mg/kg produced antinociceptive and locomotion-inducing effects in Sub mice, but not in Dom mice. Subchronic treatment with DEA at the dose of 5 mg/kg augmented dominant behavior in wild-type ICR and Dom mice but not in Sub mice. Conclusion: This study suggests that the endocannabinoid system may play a role in the regulation of dominance and submissiveness, functional elements of social behavior and personality. While currently we have only scratched the surface, understanding the role of the endocannabinoid system in personality may help in revealing the mechanisms underlying the etiopathology of psychiatric disorders.
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Affiliation(s)
- Natalya M. Kogan
- Department of Molecular Biology, Ariel University, Ariel, Israel
- The Institute of Personalized and Translational Medicine, Ariel University, Ariel, Israel
- Institute of Drug Research, Hebrew University, Jerusalem, Israel
| | | | | | - Sergey Malitsky
- Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Maxim Itkin
- Life Sciences Core Facilities, Weizmann Institute of Science, Rehovot, Israel
| | - Eyal Sharon
- The Institute of Personalized and Translational Medicine, Ariel University, Ariel, Israel
| | - Artem Klinov
- Department of Molecular Biology, Ariel University, Ariel, Israel
| | | | - Igor Koman
- Department of Molecular Biology, Ariel University, Ariel, Israel
- The Institute of Personalized and Translational Medicine, Ariel University, Ariel, Israel
| | - Zvi Vogel
- Department of Neurbiology, Weizmann Institute of Science, Rehovot, Israel
| | | | - Albert Pinhasov
- Department of Molecular Biology, Ariel University, Ariel, Israel
- Adelson School of Medicine, Ariel University, Ariel, Israel
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King'uyu DN, Edgar EL, Figueroa C, Kirkland JM, Kopec AM. Morphine exposure during adolescence induces enduring social changes dependent on adolescent stage of exposure, sex, and social test. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.04.21.537856. [PMID: 37131669 PMCID: PMC10153224 DOI: 10.1101/2023.04.21.537856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Abstract
Drug exposure during adolescence, when the 'reward' circuitry of the brain is developing, can permanently impact reward-related behavior. Epidemiological studies show that opioid treatment during adolescence, such as pain management for a dental procedure or surgery, increases the incidence of psychiatric illness including substance use disorders. Moreover, the opioid epidemic currently in the United States is affecting younger individuals raising the impetus to understand the pathogenesis of the negative effects of opioids. One reward-related behavior that develops during adolescence is social behavior. We previously demonstrated that social development occurs in rats during sex-specific adolescent periods: early to mid-adolescence in males (postnatal day (P)30-40) and pre-early adolescence in females (P20-30). We thus hypothesized that morphine exposure during the female critical period would result in adult sociability deficits in females, but not males, and morphine administered during the male critical period would result in adult sociability deficits in males, but not females. We found that morphine exposure during the female critical period primarily resulted in deficits in sociability in females, while morphine exposure during the male critical period primarily resulted in deficits in sociability primarily in males. However, depending on the test performed and the social parameter measured, social alterations could be found in both sexes that received morphine exposure at either adolescent stage. These data indicate that when drug exposure occurs during adolescence, and how the endpoint data are measured, will play a large role in determining the effects of drug exposures on social development.
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Affiliation(s)
- David N King'uyu
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College
| | - Erin L Edgar
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College
| | - Christopher Figueroa
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College
| | - J M Kirkland
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College
| | - Ashley M Kopec
- Department of Neuroscience and Experimental Therapeutics, Albany Medical College
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Larosa A, Wong TP. The hippocampus in stress susceptibility and resilience: Reviewing molecular and functional markers. Prog Neuropsychopharmacol Biol Psychiatry 2022; 119:110601. [PMID: 35842073 DOI: 10.1016/j.pnpbp.2022.110601] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 06/22/2022] [Accepted: 07/10/2022] [Indexed: 10/17/2022]
Abstract
Understanding the individual variability that comes with the likelihood of developing stress-related psychopathologies is of paramount importance when addressing mechanisms of their neurobiology. This article focuses on the hippocampus as a region that is highly influenced by chronic stress exposure and that has strong ties to the development of related disorders, such as depression and post-traumatic stress disorder. We first outline three commonly used animal models that have been used to separate animals into susceptible and resilient cohorts. Next, we review molecular and functional hippocampal markers of susceptibility and resilience. We propose that the hippocampus plays a crucial role in the differences in the processing and storage of stress-related information in animals with different stress susceptibilities. These hippocampal markers not only help us attain a more comprehensive understanding of the various facets of stress-related pathophysiology, but also could be targeted for the development of new treatments.
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Affiliation(s)
- Amanda Larosa
- Neuroscience Division, Douglas Research Centre, Montreal, QC, Canada; Integrated Program in Neuroscience, McGill University, Montreal, QC, Canada
| | - Tak Pan Wong
- Neuroscience Division, Douglas Research Centre, Montreal, QC, Canada; Dept. of Psychiatry, McGill University, Montreal, QC, Canada.
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Amorim L, Dá Mesquita S, Jacinto L, Castelhano-Carlos MJ, Santos NC, Leite-Almeida H, Sousa N. Shaping social behavior in an enriched environment. Front Behav Neurosci 2022; 16:999325. [PMID: 36311866 PMCID: PMC9606827 DOI: 10.3389/fnbeh.2022.999325] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Accepted: 09/26/2022] [Indexed: 11/25/2022] Open
Abstract
Access to vital needs shapes social orders. In rats, social systems tend to maintain a certain stability, but alterations in the physical environment can change inter-individual relations, which consequently can alter social orders. Principles governing social systems are, however, difficult to study and most analyses have been restricted to dyads of animals over short periods of time, hardly capturing the complexity and temporal dynamics of social interactions. Herein, we studied social interactions in a colony of six rats living in a customized enriched environment (PhenoWorld, PhW), under variable conditions of access/availability to limited resources. Reductions in food accessibility and availability resulted in a marked heterogeneity in sniffing, chasing and fighting/struggling behaviors, and, in the latter condition, an overall increase of these displays. The introduction of the possibility of interaction with a female rat also increased the amount of sniffing and fighting/struggling in a homogeneous manner. Results also showed that individual food retrieval success had no association with fighting/struggling when food pellets are delivered to the animals. However, there was a statistically significant correlation between fighting/struggling and impulsivity as measured by the amount of premature responses in the Variable-to-Signal-Test outside of the PhW providing external validation to our measures. To sum up, through continuous monitoring of a group of rats in the PhW, we demonstrated how variations in access to reinforcers modulate social behavior.
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Affiliation(s)
- Liliana Amorim
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Guimarães, Portugal
| | - Sandro Dá Mesquita
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Guimarães, Portugal
| | - Luís Jacinto
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Guimarães, Portugal
| | - Magda J. Castelhano-Carlos
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Guimarães, Portugal
| | - Nadine Correia Santos
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Guimarães, Portugal
| | - Hugo Leite-Almeida
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Guimarães, Portugal
| | - Nuno Sousa
- Life and Health Sciences Research Institute (ICVS), School of Medicine, University of Minho, Braga, Portugal
- ICVS/3B’s – PT Government Associate Laboratory, Guimarães, Portugal
- *Correspondence: Nuno Sousa,
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7
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Nirogi R, Abraham R, Jayarajan P, Goura V, Kallepalli R, Medapati RB, Tadiparthi J, Goyal VK, Pandey SK, Subramanian R, Petlu S, Thentu JB, Palacharla VRC, Gagginapally SR, Mohammed AR, Jasti V. Ropanicant (SUVN-911), an α4β2 nicotinic acetylcholine receptor antagonist intended for the treatment of depressive disorders: pharmacological, behavioral, and neurochemical characterization. Psychopharmacology (Berl) 2022; 239:2215-2232. [PMID: 35298691 DOI: 10.1007/s00213-022-06108-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2021] [Accepted: 01/16/2022] [Indexed: 11/26/2022]
Abstract
RATIONALE Ropanicant (SUVN-911) (3-(6-Chloropyridine-3-yloxymethyl)-2-azabicyclo (3.1.0) hexane hydrochloride) is a novel α4β2 nicotinic acetylcholine receptor (nAChR) antagonist being developed for the treatment of depressive disorders. OBJECTIVES Pharmacological and neurochemical characterization of Ropanicant to support a potential molecule for the treatment of depressive disorders. METHODS Ropanicant was assessed for antidepressant-like activity using the rat forced swimming test (FST) and differential reinforcement of low rate -72 s (DRL-72 s). Alleviation of anhedonia was assessed in chronic mild stress model using sucrose preference test. To understand the mechanism of action, serotonin levels, ionized calcium-binding adaptor molecule 1 (Iba1), and brain-derived neurotrophic factor (BDNF) were determined. The onset of antidepressant-like activity was determined using the reduction in submissive behavior assay. The effects on cognition and sexual functions were assessed using the object recognition task and sexual dysfunction assay respectively. Interaction of Ropanicant, TC-5214, and methyllycaconitine (MLA) with citalopram was investigated individually in mice FST. RESULTS Ropanicant exhibited antidepressant like properties in the FST and DRL-72 s. A significant reduction in anhedonia was observed in the sucrose preference test. Oral administration of Ropanicant produced a significant increase in serotonin and BDNF levels, with a reduction in the Iba1 activity. The onset of antidepressant like effect with Ropanicant was within a week of treatment, and was devoid of cognitive dulling and sexual dysfunction. While Ropanicant potentiated the effect of citalopram in FST, such an effect was not observed with MLA or TC-5214. CONCLUSIONS Preclinical studies with Ropanicant support the likelihood of its therapeutic utility in the treatment of depressive disorders.
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Affiliation(s)
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | - Venkat Jasti
- Suven Life Sciences Ltd, Hyderabad, 500034, India
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Boyko M, Gruenbaum BF, Shelef I, Zvenigorodsky V, Severynovska O, Binyamin Y, Knyazer B, Frenkel A, Frank D, Zlotnik A. Traumatic brain injury-induced submissive behavior in rats: link to depression and anxiety. Transl Psychiatry 2022; 12:239. [PMID: 35672289 PMCID: PMC9174479 DOI: 10.1038/s41398-022-01991-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Revised: 05/19/2022] [Accepted: 05/25/2022] [Indexed: 11/29/2022] Open
Abstract
Traumatic brain injury (TBI) affects millions of people worldwide, many of whom are affected with post-TBI mood disorders or behavioral changes, including aggression or social withdrawal. Diminished functionality can persist for decades after TBI and delay rehabilitation and resumption of employment. It has been established that there is a relationship between these mental disorders and brain injury. However, the etiology and causal relationships behind these conditions are poorly understood. Rodent models provide a helpful tool for researching mood disorders and social impairment due to their natural tendencies to form social hierarchies. Here, we present a rat model of mental complications after TBI using a suite of behavioral tests to examine the causal relationships between changes in social behavior, including aggressive, hierarchical, depressive, and anxious behavior. For this purpose, we used multivariate analysis to identify causal relationships between the above post-TBI psychiatric sequelae. We performed statistical analysis using principal component analysis, discriminant analysis, and correlation analysis, and built a model to predict dominant-submissive behavior based on the behavioral tests. This model displayed a predictive accuracy of 93.3% for determining dominant-submissive behavior in experimental groups. Machine learning algorithms determined that in rats, aggression is not a principal prognostic factor for dominant-submissive behavior. Alternatively, dominant-submissive behavior is determined solely by the rats' depressive-anxious state and exploratory activity. We expect the causal approach used in this study will guide future studies into mood conditions and behavioral changes following TBI.
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Affiliation(s)
- Matthew Boyko
- Department of Anesthesiology and Critical Care, Soroka University Medical Center and the Faculty of Health Sciences, Ben-Gurion University of the Negev, Beersheba, Israel.
| | - Benjamin F Gruenbaum
- Department of Anesthesiology and Perioperative Medicine, Mayo Clinic, Jacksonville, FL, USA
| | - Ilan Shelef
- Department of Radiology, Soroka University Medical Center and the Faculty of Health Sciences, Ben-Gurion University of the Negev, Beersheba, Israel
| | - Vladislav Zvenigorodsky
- Department of Radiology, Soroka University Medical Center and the Faculty of Health Sciences, Ben-Gurion University of the Negev, Beersheba, Israel
| | - Olena Severynovska
- Department of Biochemistry and Physiology of the Faculty of Biology and Ecology Oles Gonchar of the Dnipro National University, Dnipro, Ukraine
| | - Yair Binyamin
- Department of Anesthesiology and Critical Care, Soroka University Medical Center and the Faculty of Health Sciences, Ben-Gurion University of the Negev, Beersheba, Israel
| | - Boris Knyazer
- Department of Ophthalmology, Soroka University Medical Center and the Faculty of Health Sciences, Ben-Gurion University of the Negev, Beersheba, Israel
| | - Amit Frenkel
- Department of Anesthesiology and Critical Care, Soroka University Medical Center and the Faculty of Health Sciences, Ben-Gurion University of the Negev, Beersheba, Israel
| | - Dmitry Frank
- Department of Anesthesiology and Critical Care, Soroka University Medical Center and the Faculty of Health Sciences, Ben-Gurion University of the Negev, Beersheba, Israel
| | - Alexander Zlotnik
- Department of Anesthesiology and Critical Care, Soroka University Medical Center and the Faculty of Health Sciences, Ben-Gurion University of the Negev, Beersheba, Israel
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Hussain H, Rashan L, Hassan U, Abbas M, Hakkim FL, Green IR. Frankincense diterpenes as a bio-source for drug discovery. Expert Opin Drug Discov 2022; 17:513-529. [PMID: 35243948 DOI: 10.1080/17460441.2022.2044782] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
INTRODUCTION Frankincense (Boswellia sp.) gum resins have been employed as an incense in cultural and religious ceremonies for many years. Frankincense resin has over the years been employed to treat depression, inflammation, and cancer in traditional medicines. AREAS COVERED This inclusive review focuses on the significance of frankincense diterpenoids, and in particular, incensole derivatives for establishment future treatments of depression, neurological disorders, and cancer. The authors survey the available literature and furnish an overview of future perspectives of these intriguing molecules. EXPERT OPINION Numerous diterpenoids including cembrane, prenylaromadendrane, and the verticillane-type have been isolated from various Boswellia resins. Cembrane-type diterpenoids occupy a crucial position in pharmaceutical chemistry and related industries because of their intriguing biological and encouraging pharmacological potentials. Several cembranes have been reported to possess anti-Alzheimer, anti-inflammatory, hepatoprotective, and antimalarial effects along with a good possibility to treat anxiety and depression. Although some slight drawbacks of these compounds have been noted, including the selectivity of these diterpenoids, there is a great need to address these in future research endeavors. Moreover, it is vitally important for medicinal chemists to prepare libraries of incensole-heterocyclic analogs as well as hybrid compounds between incensole or its acetate and anti-depressant or anti-inflammatory drugs.
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Affiliation(s)
- Hidayat Hussain
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Halle, Germany
| | - Luay Rashan
- Medicinal Plants Division, Research Center, Dhofar University, Salalah, Oman
| | - Uzma Hassan
- Institute of Chemical Sciences, University of Peshawar, Peshawar, Pakistan
| | - Muzaffar Abbas
- Faculty of Pharmacy, Capital University of Science & Technology, Islamabad, Pakistan
| | | | - Ivan R Green
- Department of Chemistry and Polymer Science, University of Stellenbosch, Stellenbosch, South Africa
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Multidimensional nature of dominant behavior: Insights from behavioral neuroscience. Neurosci Biobehav Rev 2021; 132:603-620. [PMID: 34902440 DOI: 10.1016/j.neubiorev.2021.12.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 10/29/2021] [Accepted: 12/09/2021] [Indexed: 12/17/2022]
Abstract
Social interactions for many species of animals are critical for survival, wellbeing, and reproduction. Optimal navigation of a social system increases chances for survival and reproduction, therefore there is strong incentive to fit into social structures. Social animals rely heavily on dominant-submissive behaviors in establishment of stable social hierarchies. There is a link between extreme manifestation of dominance/submissiveness and behavioral deviations. To understand neural substrates affiliated with a specific hierarchical rank, there is a real need for reliable animal behavioral models. Different paradigms have been consolidated over time to study the neurobiology of social rank behavior in a standardized manner using rodent models to unravel the neural pathways and substrates involved in normal and abnormal intraspecific social interactions. This review summarizes and discusses the commonly used behavioral tests and new directions for the assessment of dominance in rodents. We discuss the hierarchy inheritable nature and other critical issues regarding hierarchical rank manifestation which may help in designing social-rank-related studies that serve as promising pre-clinical tools in behavioral psychiatry.
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11
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Rijnders RJP, Dykstra AH, Terburg D, Kempes MM, van Honk J. Sniffing submissiveness? Oxytocin administration in severe psychopathy. Psychoneuroendocrinology 2021; 131:105330. [PMID: 34182248 DOI: 10.1016/j.psyneuen.2021.105330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 04/28/2021] [Accepted: 06/14/2021] [Indexed: 01/10/2023]
Abstract
Psychopathy is a personality disorder associated with criminal behavior and violent recidivism, and therefore a burden to society. Social dominance is one of the characteristics of psychopathy that might contribute to these problems. Nevertheless, only few studies have objectively measured the relationship between socially dominant behavior and psychopathy. Therefore, the current study assessed performance of 21 forensic PCL-R confirmed psychopathic patients and 24 normal controls on a gaze aversion task, in which slower gaze aversion from masked angry faces compared to masked happy faces is a measure of reactive dominance. Moreover, the current study assessed the potential beneficial effects of the neuropeptide oxytocin. The results showed that psychopaths were not more dominant on the gaze aversion task compared to normal controls. However, the severity of psychopathy was positively correlated with reactive dominance. Crucially, a single nasal spray administration of oxytocin abolished the connection between psychopathy and reactive dominance. This implies that socially dominant psychopaths might benefit from oxytocin administration.
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Affiliation(s)
- Ronald J P Rijnders
- Netherlands Institute of Forensic Psychiatry and Psychology, Forensic Observation Clinic "Pieter Baan Centrum", Carl Barksweg 3, 1336 ZL Almere, the Netherlands; Utrecht University, Faculty of Social Sciences, Department of Psychology, Heidelberglaan 8, 3584 CS Utrecht, the Netherlands.
| | - Anouk H Dykstra
- Radboud University Medical Center, Donders Institute for Brain Cognition and Behaviour, Department of Cognitive Neuroscience, Postbox: 9101, 6500 HB Nijmegen, the Netherlands.
| | - David Terburg
- Utrecht University, Faculty of Social Sciences, Department of Psychology, Heidelberglaan 8, 3584 CS Utrecht, the Netherlands; University of Cape Town, Department of Psychiatry and Mental Health, J-Block, Groote Schuur Hospital, Observatory, 7925 Cape Town, South Africa.
| | - Maaike M Kempes
- Leiden University, Faculty of Social Sciences, Institute of Child and Education Studies, Wassenaarseweg 52, 2333 AK Leiden, the Netherlands; Netherlands Institute of Forensic Psychiatry and Psychology, Department of Science and Education, Herman Gorterstraat 5, 3511 EW Utrecht, the Netherlands.
| | - Jack van Honk
- Utrecht University, Faculty of Social Sciences, Department of Psychology, Heidelberglaan 8, 3584 CS Utrecht, the Netherlands; University of Cape Town, Department of Psychiatry and Mental Health, J-Block, Groote Schuur Hospital, Observatory, 7925 Cape Town, South Africa; University of Cape Town, Institute of Infectious Diseases and Molecular Medicine, Anzio Rd, Observatory, 7925 Cape Town, South Africa.
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12
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Robinson DL, Amodeo LR, Chandler LJ, Crews FT, Ehlers CL, Gómez-A A, Healey KL, Kuhn CM, Macht VA, Marshall SA, Swartzwelder HS, Varlinskaya EI, Werner DF. The role of sex in the persistent effects of adolescent alcohol exposure on behavior and neurobiology in rodents. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2021; 160:305-340. [PMID: 34696877 DOI: 10.1016/bs.irn.2021.07.007] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Alcohol drinking is often initiated during adolescence, and this frequently escalates to binge drinking. As adolescence is also a period of dynamic neurodevelopment, preclinical evidence has highlighted that some of the consequences of binge drinking can be long lasting with deficits persisting into adulthood in a variety of cognitive-behavioral tasks. However, while the majority of preclinical work to date has been performed in male rodents, the rapid increase in binge drinking in adolescent female humans has re-emphasized the importance of addressing alcohol effects in the context of sex as a biological variable. Here we review several of the consequences of adolescent ethanol exposure in light of sex as a critical biological variable. While some alcohol-induced outcomes, such as non-social approach/avoidance behavior and sleep disruption, are generally consistent across sex, others are variable across sex, such as alcohol drinking, sensitivity to ethanol, social anxiety-like behavior, and induction of proinflammatory markers.
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Affiliation(s)
- Donita L Robinson
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States.
| | - Leslie R Amodeo
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Department of Psychology, California State University, San Bernardino, CA, United States
| | - L Judson Chandler
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Department of Neuroscience, Medical University of South Carolina, Charleston, SC, United States
| | - Fulton T Crews
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Cindy L Ehlers
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Department of Neuroscience, Scripps Research, La Jolla, CA, United States
| | - Alexander Gómez-A
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Kati L Healey
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Department of Psychiatry and Behavioral Sciences, School of Medicine, Duke University, Durham, NC, United States
| | - Cynthia M Kuhn
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Department of Pharmacology and Cancer Biology, School of Medicine, Duke University, Durham, NC, United States
| | - Victoria A Macht
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Bowles Center for Alcohol Studies, School of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - S Alexander Marshall
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Biological and Biomedical Sciences Department, North Carolina Central University, Durham, NC, United States
| | - H Scott Swartzwelder
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Department of Psychiatry and Behavioral Sciences, School of Medicine, Duke University, Durham, NC, United States
| | - Elena I Varlinskaya
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Center for Development and Behavioral Neuroscience, Department of Psychology, Binghamton University, Binghamton, NY, United States
| | - David F Werner
- Neurobiology of Adolescent Drinking in Adulthood Consortium (NADIA), United States; Center for Development and Behavioral Neuroscience, Department of Psychology, Binghamton University, Binghamton, NY, United States
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Social dominance and multiple dimensions of psychopathology: An experimental test of reactivity to leadership and subordinate roles. PLoS One 2021; 16:e0250099. [PMID: 33909641 PMCID: PMC8081185 DOI: 10.1371/journal.pone.0250099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Accepted: 03/30/2021] [Indexed: 12/01/2022] Open
Abstract
Background Theory and research suggest that social dominance is important for multiple forms of psychopathology, and yet few studies have considered multiple dimensions of psychopathology simultaneously, and relatively few have used well-validated behavioral indices. Method Among 81 undergraduates, we used a well-validated experimental approach of assigning participants to a leadership or subordinate position, and we examined how self-rated severity of depression, social anxiety, manic tendencies, and psychopathy relate to psychophysiological and affective reactivity to this role. Results Consistent with hypotheses, manic symptoms related to more discomfort in the subordinate role compared to the leadership role, as evidenced by more decline in positive affect, more discomfort, and a larger RSA decline, while depression symptoms related to a more positive response to the subordinate role than the leadership role, including more positive affect and more comfort in the assigned role. Social anxiety was related to discomfort regardless of the assigned role, and those with higher psychopathy symptoms did not show differential response to assigned roles. Limitations Findings are limited by the mild symptom levels and absence of hormonal data. Conclusions Findings provide novel transdiagnostic evidence for the importance of social dominance to differentiate diverse forms of psychopathology.
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Tharp JA, Johnson SL, Dev A. Transdiagnostic Approach to the Dominance Behavioral System. PERSONALITY AND INDIVIDUAL DIFFERENCES 2021; 176. [PMID: 33746322 DOI: 10.1016/j.paid.2021.110778] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Affiliation(s)
- Jordan A Tharp
- Department of Psychology, University of California, Berkeley
| | - Sheri L Johnson
- Department of Psychology, University of California, Berkeley
| | - Amelia Dev
- Department of Psychology, University of California, Berkeley
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15
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Agranyoni O, Meninger-Mordechay S, Uzan A, Ziv O, Salmon-Divon M, Rodin D, Raz O, Koman I, Koren O, Pinhasov A, Navon-Venezia S. Gut microbiota determines the social behavior of mice and induces metabolic and inflammatory changes in their adipose tissue. NPJ Biofilms Microbiomes 2021; 7:28. [PMID: 33741982 PMCID: PMC7979825 DOI: 10.1038/s41522-021-00193-9] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 01/27/2021] [Indexed: 12/12/2022] Open
Abstract
The link between the gut microbiota and social behavior has been demonstrated, however the translational impact of a certain microbiota composition on stable behavioral patterns is yet to be elucidated. Here we employed an established social behavior mouse model of dominance (Dom) or submissiveness (Sub). A comprehensive 16S rRNA gene sequence analysis of Dom and Sub mice revealed a significantly different gut microbiota composition that clearly distinguishes between the two behavioral modes. Sub mice gut microbiota is significantly less diverse than that of Dom mice, and their taxa composition uniquely comprised the genera Mycoplasma and Anaeroplasma of the Tenericutes phylum, in addition to the Rikenellaceae and Clostridiaceae families. Conversely, the gut microbiota of Dom mice includes the genus Prevotella of the Bacteriodetes phylum, significantly less abundant in Sub mice. In addition, Sub mice show lower body weight from the age of 2 weeks and throughout their life span, accompanied with lower epididymis white adipose tissue (eWAT) mass and smaller adipocytes together with substantially elevated expression of inflammation and metabolic-related eWAT adipokines. Finally, fecal microbiota transplantation into germ-free mice show that Sub-transplanted mice acquired Sub microbiota and adopted their behavioral and physiological features, including depressive-like and anti-social behaviors alongside reduced eWAT mass, smaller adipocytes, and a Sub-like eWAT adipokine profile. Our findings demonstrate the critical role of the gut microbiome in determining dominance vs. submissiveness and suggest an association between gut microbiota, the eWAT metabolic and inflammatory profile, and the social behavior mode.
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Affiliation(s)
- Oryan Agranyoni
- Department of Molecular Biology, Faculty of Natural Sciences, Ariel University, Ariel, Israel
| | | | - Atara Uzan
- Azrieli Faculty of Medicine, Bar-Ilan University, Safed, Israel
| | - Oren Ziv
- Azrieli Faculty of Medicine, Bar-Ilan University, Safed, Israel
| | - Mali Salmon-Divon
- Department of Molecular Biology, Faculty of Natural Sciences, Ariel University, Ariel, Israel
- The Dr. Miriam and Sheldon G. Adelson School of Medicine, Ariel University, Ariel, Israel
| | - Dmitry Rodin
- Department of Molecular Biology, Faculty of Natural Sciences, Ariel University, Ariel, Israel
| | - Olga Raz
- Department of Molecular Biology, Faculty of Natural Sciences, Ariel University, Ariel, Israel
| | - Igor Koman
- Department of Molecular Biology, Faculty of Natural Sciences, Ariel University, Ariel, Israel
| | - Omry Koren
- Azrieli Faculty of Medicine, Bar-Ilan University, Safed, Israel
| | - Albert Pinhasov
- Department of Molecular Biology, Faculty of Natural Sciences, Ariel University, Ariel, Israel.
- The Dr. Miriam and Sheldon G. Adelson School of Medicine, Ariel University, Ariel, Israel.
| | - Shiri Navon-Venezia
- Department of Molecular Biology, Faculty of Natural Sciences, Ariel University, Ariel, Israel.
- The Dr. Miriam and Sheldon G. Adelson School of Medicine, Ariel University, Ariel, Israel.
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16
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Murlanova K, Michaelevski I, Kreinin A, Terrillion C, Pletnikov M, Pinhasov A. Link between temperament traits, brain neurochemistry and response to SSRI: insights from animal model of social behavior. J Affect Disord 2021; 282:1055-1066. [PMID: 33601678 DOI: 10.1016/j.jad.2020.11.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 09/14/2020] [Accepted: 11/01/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND Dominant-submissive relationships depend upon functionality of the neural circuits involving monoaminergic neurotransmission. Behavioral profiles of selectively bred dominant (Dom) and submissive (Sub) mice have been proposed to mimic hyperthymic- or depressive-like temperaments observed in patients with affective disorders. These mice differentially respond to psychotropic agents and stressful stimuli, however, the mechanisms underlying these differences remain unclear. To address these mechanisms, we analyzed the brain monoamine content and responses to paroxetine (PXT) in Dom and Sub mice. METHODS The behavioral effects of PXT (3 mg/kg, single injection) were assessed with the Elevated Plus Maze (EPM) and Forced Swim Test (FST). Monoamine tissue content was analyzed by HPLC-ECD. RESULTS Compared to Dom, Sub mice had decreased levels of serotonin (5-HT) in the brainstem (BS), reduced levels of norepinephrine (NE) in the prefrontal cortex (PFC), hippocampus (HPC), and striatum (STR) and elevated levels of dopamine (DA) in PFC, HPC, STR and BS. In EPM, PXT administration increased locomotion and exploration in Dom mice, with no effect in Sub mice. In FST, PXT disrupted immobility in Dom mice only. The PXT-produced differences in regional monoamine content were strain-dependent and consistent with the behavioral alterations. LIMITATIONS Chronic PXT treatment, in vivo monoamine assays and sex-dependent analysis were out of the scope of this study and will be performed in the future in order to provide an in-depth evaluation of the neurochemical mechanisms underlying temperament-dependent responses to SSRIs. CONCLUSIONS Our findings suggest neurochemical mechanisms that underlie temperament-based response to antidepressant treatment.
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Affiliation(s)
- Kateryna Murlanova
- Department of Molecular Biology, Ariel University, Ariel 4070000, Israel; Department of Psychiatry and Behavioral Sciences and Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA; Department of Physiology and Biophysics, The Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, New York 14203, USA
| | - Izhak Michaelevski
- Department of Molecular Biology, Ariel University, Ariel 4070000, Israel; Adelson School of Medicine, Ariel University, Ariel 4070000, Israel
| | - Anatoly Kreinin
- Department of Molecular Biology, Ariel University, Ariel 4070000, Israel
| | - Chantelle Terrillion
- Department of Psychiatry and Behavioral Sciences and Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - Mikhail Pletnikov
- Department of Psychiatry and Behavioral Sciences and Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA; Department of Physiology and Biophysics, The Jacobs School of Medicine and Biomedical Sciences, State University of New York at Buffalo, Buffalo, New York 14203, USA
| | - Albert Pinhasov
- Department of Molecular Biology, Ariel University, Ariel 4070000, Israel; Adelson School of Medicine, Ariel University, Ariel 4070000, Israel.
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Giacolini T, Conversi D, Alcaro A. The Brain Emotional Systems in Addictions: From Attachment to Dominance/Submission Systems. Front Hum Neurosci 2021; 14:609467. [PMID: 33519403 PMCID: PMC7843379 DOI: 10.3389/fnhum.2020.609467] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2020] [Accepted: 12/22/2020] [Indexed: 12/03/2022] Open
Abstract
Human development has become particularly complex during the evolution. In this complexity, adolescence is an extremely important developmental stage. Adolescence is characterized by biological and social changes that create the prerequisites to psychopathological problems, including both substance and non-substance addictive behaviors. Central to the dynamics of the biological changes during adolescence are the synergy between sexual and neurophysiological development, which activates the motivational/emotional systems of Dominance/Submission. The latter are characterized by the interaction between the sexual hormones, the dopaminergic system and the stress axis (HPA). The maturation of these motivational/emotional systems requires the integration with the phylogenetically more recent Attachment/CARE Systems, which primarily have governed the subject's relationships until puberty. The integration of these systems is particularly complex in the human species, due to the evolution of the process of competition related to sexual selection: from a simple fight between two individuals (of the same genus and species) to a struggle for the acquisition of a position in rank and the competition between groups. The latter is an important evolutionary acquisition and believed to be the variable that has most contributed to enhancing the capacity for cooperation in the human species. The interaction between competition and cooperation, and between competition and attachment, characterizes the entire human relational and emotional structure and the unending work of integration to which the BrainMind is involved. The beginning of the integration of the aforementioned motivational/emotional systems is currently identified in the prepubertal period, during the juvenile stage, with the development of the Adrenarche-the so-called Adrenal Puberty. This latter stage is characterized by a low rate of release of androgens, the hormones released by the adrenal cortex, which activate the same behaviors as those observed in the PLAY system. The Adrenarche and the PLAY system are biological and functional prerequisites of adolescence, a period devoted to learning the difficult task of integrating the phylogenetically ancient Dominance/Submission Systems with the newer Attachment/CARE Systems. These systems accompany very different adaptive goals which can easily give rise to mutual conflict and can in turn make the balance of the BrainMind precarious and vulnerable to mental suffering.
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Affiliation(s)
- Teodosio Giacolini
- Department of Human Neuroscience, Sapienza University of Rome, Rome, Italy
| | - David Conversi
- Department of Psychology, Sapienza University of Rome, Rome, Italy
| | - Antonio Alcaro
- Department of Psychology, Sapienza University of Rome, Rome, Italy
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Stress in groups: Lessons from non-traditional rodent species and housing models. Neurosci Biobehav Rev 2020; 113:354-372. [PMID: 32278793 DOI: 10.1016/j.neubiorev.2020.03.033] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2019] [Revised: 03/06/2020] [Accepted: 03/31/2020] [Indexed: 02/06/2023]
Abstract
A major feature of life in groups is that individuals experience social stressors of varying intensity and type. Social stress can have profound effects on health, social behavior, and ongoing relationships. Relationships can also buffer the experience of exogenous stressors. Social stress has most commonly been investigated in dyadic contexts in mice and rats that produce intense stress. Here we review findings from studies of diverse rodents and non-traditional group housing paradigms, focusing on laboratory studies of mice and rats housed in visible burrow systems, prairie and meadow voles, and mole-rats. We argue that the use of methods informed by the natural ecology of rodent species provides novel insights into the relationship between social stress, behavior and physiology. In particular, we describe how this ethologically inspired approach reveals how individuals vary in their experience of and response to social stress, and how ecological and social contexts impact the effects of stress. Social stress induces adaptive changes, as well as long-term disruptive effects on behavior and physiology.
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19
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Link between personality and response to THC exposure. Behav Brain Res 2019; 379:112361. [PMID: 31734264 DOI: 10.1016/j.bbr.2019.112361] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Revised: 10/29/2019] [Accepted: 11/14/2019] [Indexed: 12/15/2022]
Abstract
The effects of cannabis reported by users range from experiences of euphoria and anxiolytic effects to paranoia, anxiety, and increased risk of depression. Attempts to reconcile the apparent contradictions in user response have not been conclusive. Here, we utilized selectively-bred stress-resilient socially dominant (Dom) and stress-sensitive socially submissive (Sub) mice to elucidate this contradiction. Following short-term, repeated treatment with delta-9-tetrahydrocannabinol (THC) at two different doses (1.5 mg/kg and 15 mg/kg), Sub mice presented significant place-aversion in a Conditioned Place Preference paradigm at a high dose, whereas Dom mice displayed no place preference or aversion. Forced Swim test conducted after 6-week of washout period, revealed differential impact of the two THC doses depending upon behavioral pattern. Specifically, the low dose alleviated depressive-like behavior in Sub mice, while the high dose produced the opposite effect in Dom mice. Interestingly, corticosterone concentration in serum was elevated at the high dose regardless of the mice-population tested. We conclude here that differences in dominance behavior and stress vulnerability are involved in the regulation of cannabis response among users and should be considered when prescribing THC-containing medications to patients.
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20
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Early life stress induces submissive behavior in adult rats. Behav Brain Res 2019; 372:112025. [DOI: 10.1016/j.bbr.2019.112025] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 04/18/2019] [Accepted: 06/08/2019] [Indexed: 12/16/2022]
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Shin KE, Newman MG. Self- and other-perceptions of interpersonal problems: Effects of generalized anxiety, social anxiety, and depression. J Anxiety Disord 2019; 65:1-10. [PMID: 31054457 PMCID: PMC6658327 DOI: 10.1016/j.janxdis.2019.04.005] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2018] [Revised: 04/09/2019] [Accepted: 04/21/2019] [Indexed: 11/28/2022]
Abstract
Despite attention on overlap and distinction between generalized anxiety disorder (GAD), social anxiety disorder (SAD), and major depressive disorder (MDD), interpersonal specificity (distinct, prototypical interpersonal features) between the disorders has been understudied. There is emerging evidence for such specificity (e.g., Erickson et al., 2016), but most studies relied on self-report, and not all studies controlled for shared variance between the disorders, complicating interpretation of findings. The present study extended the literature by examining unique interpersonal correlates of GAD, SAD, and MDD symptoms on self- and informant-report, and how self-informant agreement (both mean-level and correlation) in perception of interpersonal affiliation, dominance, and distress varied as a function of the symptoms. 369 college-aged participants (43% with clinical-level symptoms for at least one of the disorders (GAD, SAD, MDD), 57% non-disordered) and up to three of their significant others rated participants' interpersonal problems (interpersonal behaviors that were difficult to engage in or engaged in excessively). We found evidence for exploitable tendencies in GAD, socially avoidant and nonassertive tendencies in SAD, and coldness in MDD based on self-report, but not on informant-report. Although self-other correlation was positive across outcomes, participants endorsed higher affiliation and interpersonal distress and lower dominance relative to informants. GAD, SAD, and MDD symptoms showed distinct moderating effects on these self-informant discrepancies. GAD symptoms predicted over-endorsing affiliation, SAD predicted under-endorsing dominance and affiliation, and MDD predicted no discrepancies in affiliation and dominance. The results speak to potential differentiation of the disorders based on distinct patterns of self-other discrepancy in interpersonal perceptions.
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Affiliation(s)
- Ki Eun Shin
- Department of Psychology, Pennsylvania State University, Moore Building, University Park, PA, 16802, United States.
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22
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Giacolini T, Sabatello U. Psychoanalysis and Affective Neuroscience. The Motivational/Emotional System of Aggression in Human Relations. Front Psychol 2019; 9:2475. [PMID: 30692947 PMCID: PMC6340068 DOI: 10.3389/fpsyg.2018.02475] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Accepted: 11/21/2018] [Indexed: 01/13/2023] Open
Abstract
This article highlights the evolutionary biological epistemology in Freud psychoanalytic theory. The concepts of aggressive and sexual drives are cornerstones of the psychoanalytic epistemological system, concerning the motivational/emotional roots of mental functioning. These biological roots of mental functioning, especially with regard to aggressive drive, have gradually faded away from psychoanalytic epistemology, as we show in this article. Currently, however, Neurosciences, and in particular Affective Neuroscience (Panksepp, 1998), can help us to have a better understanding of the biological roots of human mental functioning. The motivational/emotional systems studied by Affective Neuroscience can give a new epistemological foundation to the aggressive drive concept in psychoanalytic theory. Over the course of human evolution, motivational/emotional systems have played a role in social relationships and also in mental functioning. In this regard, among the various types of aggression (ANGER in Panksepp taxonomy 1998) that we consider in our article, inter-male aggression, also named Dominance motivational/emotional system, is that which regulates social interactions between sexually matured adults. This type of aggression acts in complementary connection with FEAR motivational/emotional system that regulate submissive behavior and social defeat, and the latter one is of the more important stressors. The interaction between aggression and FEAR motivational/emotional systems gives rise to agonistic behavior or dominance/submission motivational/emotional system, as we propose in our article. There is now a large literature that identifies in the dynamic of Competitive behavior, which is one of the main factors of mental illness. When social interactions activate the competitive behavior, the subject can perceive himself as "destined to victory" or "destined to defeat," activating either behaviors or emotions connected to the Involuntary Defeat Strategy or Involuntary Dominant Strategy (Sloman, 2002), which we can find in many types of mental disorders, for example, mood disorders or anxiety disorders.
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Affiliation(s)
- Teodosio Giacolini
- Department of Human Neuroscience, Sapienza University of Rome, Rome, Italy
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23
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Individual responses of rodents in modelling of affective disorders and in their treatment: prospective review. Acta Neuropsychiatr 2018; 30:323-333. [PMID: 29909818 DOI: 10.1017/neu.2018.14] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
IntroductionLack of good animal models for affective disorders, including major depression and bipolar disorder, is noted as a major bottleneck in attempts to study these disorders and develop better treatments. We suggest that an important approach that can help in the development and use of better models is attention to variability between model animals. RESULTS: Differences between mice strains were studied for some decades now, and sex differences get more attention than in the past. It is suggested that one factor that is mostly neglected, individual variability within groups, should get much more attention. The importance of individual differences in behavioral biology and ecology was repeatedly mentioned but its application to models of affective illness or to the study of drug response was not heavily studied. The standard approach is to overcome variability by standardization and by increasing the number of animals per group. CONCLUSIONS: Possibly, the individuality of specific animals and their unique responses to a variety of stimuli and drugs, can be helpful in deciphering the underlying biology of affective behaviors as well as offer better prediction of drug responses in patients.
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Gross M, Romi H, Gilimovich Y, Drori E, Pinhasov A. Placental glucocorticoid receptor and 11β-hydroxysteroid dehydrogenase-2 recruitment indicates impact of prenatal adversity upon postnatal development in mice. Stress 2018; 21:474-483. [PMID: 29648494 DOI: 10.1080/10253890.2018.1460660] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Prenatal stress may increase concentrations of maternal glucocorticoids, which restrict fetal growth, with variable impact upon postnatal development. Among key regulators of stress hormone effects are the glucocorticoid receptor (GR) and 11β-hydroxysteroid dehydrogenase-2 (11βHSD2), the enzyme that inactivates glucocorticoid. This study utilized mice selectively bred for social dominance (Dom) or submissiveness (Sub), respectively exhibiting resilience or sensitivity to stress, to test whether stress-induced alterations in placental GR and 11βHSD2 protein expression may mediate divergent effects of prenatal adversity upon postnatal development. Pregnant Dom and Sub dams underwent prenatal restraint stress (PRS) for 45 min on gestational days (GD) 15-17. PRS induced a similar spike in serum corticosterone concentrations of dams from each strain on GD15 (p < .001, n = 8), and impaired fetal growth (p < .01, n = 5 litters), although Dom placentae were larger than Sub placentae (p < .01). Among placentae from Dom dams, PRS elevated protein contents of both GR (p < .05, n = 5 litters) and 11βHSD2 (p < .01) on GD19. In contrast, GR contents were reduced among placentae from PRS-exposed Sub mice (p < .01), without changes in 11βHSD2 content. Correspondingly, Dom PRS pup growth recovered by PND14, yet Sub PRS pups remained underweight into adolescence (p < .0001, n = 40 pups). Thus, prenatal stress more strongly increased placental GR and 11βHSD2 levels among Dom mice than in Subs. Increased GR may improve placental function and up-regulate 11βHSD2 expression, protecting fetuses from effects of prenatal stress upon postnatal development. Placental recruitment of GR and 11βHSD2 are potential markers of stress-induced developmental disorders, in accordance with maternal resilience or sensitivity to stress.
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Affiliation(s)
- Moshe Gross
- Department of Molecular Biology, Ariel University, Ariel, Israel
| | - Hava Romi
- Department of Molecular Biology, Ariel University, Ariel, Israel
| | | | - Elyashiv Drori
- Department of Chemical Engineering and Biotechnology, Ariel University, Ariel, Israel
- Agriculture and Oenology Research Department, Eastern R&D center, Ariel, Israel
| | - Albert Pinhasov
- Department of Molecular Biology, Ariel University, Ariel, Israel
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Burman OH, Mendl MT. A novel task to assess mood congruent memory bias in non-human animals. J Neurosci Methods 2018; 308:269-275. [DOI: 10.1016/j.jneumeth.2018.07.003] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Revised: 06/27/2018] [Accepted: 07/02/2018] [Indexed: 11/15/2022]
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Social dominance predicts hippocampal glucocorticoid receptor recruitment and resilience to prenatal adversity. Sci Rep 2018; 8:9595. [PMID: 29941995 PMCID: PMC6018627 DOI: 10.1038/s41598-018-27988-9] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 06/12/2018] [Indexed: 12/19/2022] Open
Abstract
The developing fetus is highly sensitive to prenatal stress, which may alter Hypothalamic-Pituitary-Adrenal (HPA) axis programming and increase the risk of behavioral disorders. There is high variability among the human population, wherein many offspring of stressed pregnancies display resilience to adversity, while the remainder displays vulnerability. In order to identify biological substrates mediating between resilience or vulnerability to prenatal adversity, we exposed stress-resistant Dominant (Dom) and stress-sensitive Submissive (Sub) mice to mild prenatal restraint stress (PRS, 45 min on gestational days (GD) 15, 16 and 17). We hypothesized that PRS would differentially alter prenatal programming of limbic regions regulating the HPA axis and affect among Dom and Sub offspring. Indeed, PRS increased Sub offspring’s serum corticosterone, and exaggerated their anxiety- and depressive-like behavior, while Dom offspring remained resilient to the hormonal and behavioral consequences of PRS. Moreover, PRS exposure markedly facilitated glucocorticoid receptor (GR) recruitment to the hippocampus among Dom mice in response to restraint stress, which may be responsible for their resilience to stressful challenge. These findings suggest proclivity to adaptive or maladaptive prenatal programming of hippocampal GR recruitment to be inheritable and predictable by social dominance or submissiveness.
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The immunomodulatory tellurium compound ammonium trichloro (dioxoethylene-O,O') tellurate reduces anxiety-like behavior and corticosterone levels of submissive mice. Behav Pharmacol 2018; 28:458-465. [PMID: 28590303 DOI: 10.1097/fbp.0000000000000319] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Ammonium trichloro (dioxoethylene-O,O') tellurate (AS101) is a synthetic organotellurium compound with potent immunomodulatory and neuroprotective properties shown to inhibit the function of integrin αvβ3, a presynaptic cell-surface-adhesion receptor. As partial deletion of αvβ3 downregulated reuptake of serotonin by the serotonin transporter, we hypothesized that AS101 may influence pathways regulating anxiety. AS101 was tested in the modulation of anxiety-like behavior using the selectively bred Submissive (Sub) mouse strain that develop anxiety-like behavior in response to an i.p. injection. Mice were treated daily with AS101 (i.p., 125 or 200 μg/kg) or vehicle for 3 weeks, after which their anxiety-like behavior was measured in the elevated plus maze. Animals were then culled for the measurement of serum corticosterone levels by ELISA and hippocampal expression of brain-derived neurotrophic factor (BDNF) by RT-PCR. Chronic administration of AS101 significantly reduced anxiety-like behavior of Sub mice in the elevated plus maze, according to both time spent and entries to open arms, relative to vehicle-treated controls. AS101 also markedly reduced serum corticosterone levels of the treated mice and increased their hippocampal BDNF expression. Anxiolytic-like effects of AS101 may be attributed to the modulation of the regulatory influence integrin of αvβ3 upon the serotonin transporter, suggesting a multifaceted mechanism by which AS101 buffers the hypothalamic-pituitary-adrenal axis response to injection stress, enabling recovery of hippocampal BDNF expression and anxiety-like behavior in Sub mice. Further studies should advance the potential of AS101 in the context of anxiety-related disorders.
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Modèles animaux de troubles bipolaires : vers de nouvelles perspectives. ANNALES MEDICO-PSYCHOLOGIQUES 2018. [DOI: 10.1016/j.amp.2017.12.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Volk N, Pape JC, Engel M, Zannas AS, Cattane N, Cattaneo A, Binder EB, Chen A. Amygdalar MicroRNA-15a Is Essential for Coping with Chronic Stress. Cell Rep 2017; 17:1882-1891. [PMID: 27829158 PMCID: PMC5120368 DOI: 10.1016/j.celrep.2016.10.038] [Citation(s) in RCA: 51] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Revised: 04/29/2016] [Accepted: 10/13/2016] [Indexed: 01/08/2023] Open
Abstract
MicroRNAs are important regulators of gene expression and associated with stress-related psychiatric disorders. Here, we report that exposing mice to chronic stress led to a specific increase in microRNA-15a levels in the amygdala-Ago2 complex and a concomitant reduction in the levels of its predicted target, FKBP51, which is implicated in stress-related psychiatric disorders. Reciprocally, mice expressing reduced levels of amygdalar microRNA-15a following exposure to chronic stress exhibited increased anxiety-like behaviors. In humans, pharmacological activation of the glucocorticoid receptor, as well as exposure to childhood trauma, was associated with increased microRNA-15a levels in peripheral blood. Taken together, our results support an important role for microRNA-15a in stress adaptation and the pathogenesis of stress-related psychopathologies. miR-15a levels are elevated in the amygdala-Ago2 complex following chronic stress miR-15a targets FKBP51 and affects behavioral responses to stressful challenges miR-15a is elevated in peripheral human blood following dexamethasone exposure miR-15a is elevated in peripheral human blood of patients exposed to childhood trauma
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Affiliation(s)
- Naama Volk
- Department of Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel; Department of Stress Neurobiology and Neurogenetics, Max Planck Institute of Psychiatry, Munich, Bavaria 80804, Germany
| | - Julius C Pape
- Department of Translational Research in Psychiatry, Max Planck Institute of Psychiatry, Munich, Bavaria 80804, Germany
| | - Mareen Engel
- Department of Stress Neurobiology and Neurogenetics, Max Planck Institute of Psychiatry, Munich, Bavaria 80804, Germany
| | - Anthony S Zannas
- Department of Translational Research in Psychiatry, Max Planck Institute of Psychiatry, Munich, Bavaria 80804, Germany; Department of Psychiatry and Behavioral Sciences, Duke University Medical Center, Durham, NC 27710, USA
| | - Nadia Cattane
- Biological Psychiatry Unit, IRCCS Fatebenefratelli, University of Brescia, 25121 Brescia, Italy
| | - Annamaria Cattaneo
- Biological Psychiatry Unit, IRCCS Fatebenefratelli, University of Brescia, 25121 Brescia, Italy; Department of Psychological Medicine, Institute of Psychiatry, Psychology & Neuroscience, King's College London, London WC2R 2LS, UK
| | - Elisabeth B Binder
- Department of Translational Research in Psychiatry, Max Planck Institute of Psychiatry, Munich, Bavaria 80804, Germany; Department of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, GA 30322, USA
| | - Alon Chen
- Department of Neurobiology, Weizmann Institute of Science, Rehovot 76100, Israel; Department of Stress Neurobiology and Neurogenetics, Max Planck Institute of Psychiatry, Munich, Bavaria 80804, Germany.
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Borovok N, Nesher E, Reichenstein M, Tikhonova T, Levin Y, Pinhasov A, Michaelevski I. Effect of social interactions on hippocampal protein expression in animal dominant and submissive model of behavioral disorders. Proteomics Clin Appl 2017; 11. [DOI: 10.1002/prca.201700089] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2017] [Revised: 06/07/2017] [Accepted: 06/26/2017] [Indexed: 02/02/2023]
Affiliation(s)
- Natalia Borovok
- Department of Biochemistry and Molecular Biology; Tel Aviv University; Tel-Aviv Israel
| | | | - Michal Reichenstein
- Department of Biochemistry and Molecular Biology; Tel Aviv University; Tel-Aviv Israel
| | | | - Yishai Levin
- de Botton Institute for Protein Profiling; The Nancy & Stephen Grand Israel National Center for Personalized Medicine; Weizmann Institute of Science; Rehovot Israel
| | - Albert Pinhasov
- Department of Molecular Biology; Ariel University; Ariel Israel
| | - Izhak Michaelevski
- Department of Molecular Biology; Ariel University; Ariel Israel
- Department of Biochemistry and Molecular Biology; Tel Aviv University; Tel-Aviv Israel
- Sagol School of Neuroscience; Tel Aviv University; Tel Aviv Israel
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Steinman MQ, Trainor BC. Sex differences in the effects of social defeat on brain and behavior in the California mouse: Insights from a monogamous rodent. Semin Cell Dev Biol 2016; 61:92-98. [PMID: 27375045 DOI: 10.1016/j.semcdb.2016.06.021] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Revised: 06/28/2016] [Accepted: 06/29/2016] [Indexed: 11/20/2022]
Abstract
Women are nearly twice as likely as men to be diagnosed with major depressive disorder, yet the use of female animal models in studying the biological basis of depression lags behind that of males. The social defeat model uses social stress to generate depression-like symptoms in order to study the neurobiological mechanisms. In general, social defeat is difficult to apply in female rodents. However, male and female California mice (Peromyscus californicus) are territorial. This allows defeat to be studied in both sexes. Males exposed to defeat tend to exhibit proactive coping mechanisms and demonstrate aggression and reduced cognitive flexibility. Females exposed to defeat engage more in reactive coping mechanisms which is highlighted by social avoidance and low aggression. Importantly, effects of defeat on social interaction behavior in females is independent of adult gonadal steroids. These behavioral phenotypes are associated with sex-specific changes in arginine vasopressin (AVP) and oxytocin (OT), closely related peptides that regulate social behavior and stress reactivity. In brain regions associated with stress responses and social behavior, defeat induced long term decreases in AVP activity and increases in OT activity in males and females respectively. Intranasal OT administration was shown to mimic the effects of defeat-induced increases in endogenous OT activity, causing social withdrawal in undefeated females. This suggests that inhibition of OT activity could reduce the impact of stress on behavior in females. These results highlight the value of maintaining diverse rodent models in the search for sex-specific pharmacological approaches to treating mood disorders.
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Affiliation(s)
- Michael Q Steinman
- Committee on the Neurobiology of Addictive Disorders, The Scripps Research Institute, La Jolla, CA 92037, U.S.A
| | - Brian C Trainor
- Department of Psychology and Center for Neuroscience, University of California, Davis, CA 95616, U.S.A..
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Bouchatta O, Ouhaz Z, Ba-Mhamed S, Kerekes N, Bennis M. Acute and chronic glue sniffing effects and consequences of withdrawal on aggressive behavior. Life Sci 2016; 152:14-20. [DOI: 10.1016/j.lfs.2016.03.013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 02/23/2016] [Accepted: 03/07/2016] [Indexed: 01/23/2023]
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Abstract
Much of the current understanding about the pathogenesis of altered mood, impaired concentration and neurovegetative symptoms in major depression has come from animal models. However, because of the unique and complex features of human depression, the generation of valid and insightful depression models has been less straightforward than modeling other disabling diseases like cancer or autoimmune conditions. Today's popular depression models creatively merge ethologically valid behavioral assays with the latest technological advances in molecular biology and automated video-tracking. This chapter reviews depression assays involving acute stress (e.g., forced swim test), models consisting of prolonged physical or social stress (e.g., social defeat), models of secondary depression, genetic models, and experiments designed to elucidate the mechanisms of antidepressant action. These paradigms are critically evaluated in relation to their ease, validity and replicability, the molecular insights that they have provided, and their capacity to offer the next generation of therapeutics for depression.
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Sharma AN, Fries GR, Galvez JF, Valvassori SS, Soares JC, Carvalho AF, Quevedo J. Modeling mania in preclinical settings: A comprehensive review. Prog Neuropsychopharmacol Biol Psychiatry 2016; 66:22-34. [PMID: 26545487 PMCID: PMC4728043 DOI: 10.1016/j.pnpbp.2015.11.001] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Revised: 09/29/2015] [Accepted: 11/03/2015] [Indexed: 12/17/2022]
Abstract
The current pathophysiological understanding of mechanisms leading to onset and progression of bipolar manic episodes remains limited. At the same time, available animal models for mania have limited face, construct, and predictive validities. Additionally, these models fail to encompass recent pathophysiological frameworks of bipolar disorder (BD), e.g. neuroprogression. Therefore, there is a need to search for novel preclinical models for mania that could comprehensively address these limitations. Herein we review the history, validity, and caveats of currently available animal models for mania. We also review new genetic models for mania, namely knockout mice for genes involved in neurotransmission, synapse formation, and intracellular signaling pathways. Furthermore, we review recent trends in preclinical models for mania that may aid in the comprehension of mechanisms underlying the neuroprogressive and recurring nature of BD. In conclusion, the validity of animal models for mania remains limited. Nevertheless, novel (e.g. genetic) animal models as well as adaptation of existing paradigms hold promise.
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Affiliation(s)
- Ajaykumar N. Sharma
- Center for Translational Psychiatry, Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA,Center of Excellence on Mood Disorders, Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA
| | - Gabriel R. Fries
- Center for Translational Psychiatry, Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA
| | - Juan F. Galvez
- Department of Psychiatry, Pontificia Universidad Javeriana School of Medicine, Bogotá, Colombia
| | - Samira S. Valvassori
- Laboratory of Neurosciences, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina, Criciúma, SC, Brazil
| | - Jair C. Soares
- Center of Excellence on Mood Disorders, Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA
| | - André F. Carvalho
- Department of Clinical Medicine and Translational Psychiatry Research Group, Faculty of Medicine, Federal University of Ceará, Fortaleza, CE, Brazil
| | - Joao Quevedo
- Center for Translational Psychiatry, Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA; Center of Excellence on Mood Disorders, Department of Psychiatry and Behavioral Sciences, The University of Texas Health Science Center at Houston, Houston, TX 77054, USA; Laboratory of Neurosciences, Graduate Program in Health Sciences, Health Sciences Unit, University of Southern Santa Catarina, Criciúma, SC, Brazil.
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Gross M, Pinhasov A. Chronic mild stress in submissive mice: Marked polydipsia and social avoidance without hedonic deficit in the sucrose preference test. Behav Brain Res 2016; 298:25-34. [DOI: 10.1016/j.bbr.2015.10.049] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2015] [Revised: 10/20/2015] [Accepted: 10/25/2015] [Indexed: 12/15/2022]
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Logan RW, McClung CA. Animal models of bipolar mania: The past, present and future. Neuroscience 2015; 321:163-188. [PMID: 26314632 DOI: 10.1016/j.neuroscience.2015.08.041] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Revised: 08/17/2015] [Accepted: 08/18/2015] [Indexed: 12/19/2022]
Abstract
Bipolar disorder (BD) is the sixth leading cause of disability in the world according to the World Health Organization and affects nearly six million (∼2.5% of the population) adults in the United State alone each year. BD is primarily characterized by mood cycling of depressive (e.g., helplessness, reduced energy and activity, and anhedonia) and manic (e.g., increased energy and hyperactivity, reduced need for sleep, impulsivity, reduced anxiety and depression), episodes. The following review describes several animal models of bipolar mania with a focus on more recent findings using genetically modified mice, including several with the potential of investigating the mechanisms underlying 'mood' cycling (or behavioral switching in rodents). We discuss whether each of these models satisfy criteria of validity (i.e., face, predictive, and construct), while highlighting their strengths and limitations. Animal models are helping to address critical questions related to pathophysiology of bipolar mania, in an effort to more clearly define necessary targets of first-line medications, lithium and valproic acid, and to discover novel mechanisms with the hope of developing more effective therapeutics. Future studies will leverage new technologies and strategies for integrating animal and human data to reveal important insights into the etiology, pathophysiology, and treatment of BD.
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Affiliation(s)
- R W Logan
- University of Pittsburgh School of Medicine, Department of Psychiatry, 450 Technology Drive, Suite 223, Pittsburgh, PA 15219, United States
| | - C A McClung
- University of Pittsburgh School of Medicine, Department of Psychiatry, 450 Technology Drive, Suite 223, Pittsburgh, PA 15219, United States.
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Dulka BN, Lynch JF, Latsko MS, Mulvany JL, Jasnow AM. Phenotypic responses to social defeat are associated with differences in cued and contextual fear discrimination. Behav Processes 2015; 118:115-22. [PMID: 26102254 DOI: 10.1016/j.beproc.2015.06.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Revised: 06/05/2015] [Accepted: 06/10/2015] [Indexed: 12/20/2022]
Abstract
Conflict among individuals is one of the most common forms of stressors experienced across a variety of species, including humans. Social defeat models in mice produce two phenotypic behavioral responses characterized by prolonged social avoidance (susceptibility) or continued social interaction (resistance). The resistant phenotype has been proposed as a model of resilience to chronic stress-induced depression in humans. Previously, we have found that mice that are resistant to social defeat stress display significant impairments in extinction learning and retention, suggesting that continued social interaction following the experience of social defeat may be associated with maladaptive fear responses. Here, we examined how individual differences in response to social defeat may be related to differences in cued and context fear discrimination. Following defeat, resistant mice showed increased fear to a neutral cued stimulus (CS-) compared to control and susceptible mice, but were still able to significantly discriminate between the CS+ and CS-. Likewise, both phenotypes were generally able to discriminate between the training context and neutral context at all retention intervals tested (1, 5, 14 days). However, susceptible mice displayed significantly better discrimination compared to resistant and non-defeated control mice when assessing the discrimination ratio. Thus, at a time when most animals begin exhibiting generalization to contextual cues, susceptible mice retain the ability to discriminate between fearful and neutral contexts. These data suggest that the differences observed in context and cued discrimination between susceptible and resistant mice may be related to differences in their coping strategies in response to social defeat. In particular, resistance or resilience to social defeat as traditionally characterized may be associated with altered inhibitory learning. Understanding why individual differences arise in response to stress, including social confrontation is important in understanding the development and treatment of stress related pathologies such as PTSD.
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Affiliation(s)
- Brooke N Dulka
- Department of Psychological Sciences, Kent State University, Kent, OH 44242, United States
| | - Joseph F Lynch
- Department of Psychological Sciences, Kent State University, Kent, OH 44242, United States
| | - Maeson S Latsko
- Department of Psychological Sciences, Kent State University, Kent, OH 44242, United States
| | - Jessica L Mulvany
- Department of Psychological Sciences, Kent State University, Kent, OH 44242, United States
| | - Aaron M Jasnow
- Department of Psychological Sciences, Kent State University, Kent, OH 44242, United States.
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Nesher E, Koman I, Gross M, Tikhonov T, Bairachnaya M, Salmon-Divon M, Levin Y, Gerlitz G, Michaelevski I, Yadid G, Pinhasov A. Synapsin IIb as a functional marker of submissive behavior. Sci Rep 2015; 5:10287. [PMID: 25998951 PMCID: PMC4441117 DOI: 10.1038/srep10287] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2014] [Accepted: 04/09/2015] [Indexed: 12/22/2022] Open
Abstract
Dominance and submissiveness are important functional elements of the social hierarchy. By employing selective breeding based on a social interaction test, we developed mice with strong and stable, inheritable features of dominance and submissiveness. In order to identify candidate genes responsible for dominant and submissive behavior, we applied transcriptomic and proteomic studies supported by molecular, behavioral and pharmacological approaches. We clearly show here that the expression of Synapsin II isoform b (Syn IIb) is constitutively upregulated in the hippocampus and striatum of submissive mice in comparison to their dominant and wild type counterparts. Moreover, the reduction of submissive behavior achieved after mating and delivery was accompanied by a marked reduction of Syn IIb expression. Since submissiveness has been shown to be associated with depressive-like behavior, we applied acute SSRI (Paroxetine) treatment to reduce submissiveness in studied mice. We found that reduction of submissive behavior evoked by Paroxetine was paired with significantly decreased Syn IIb expression. In conclusion, our findings indicate that submissiveness, known to be an important element of depressive-like behavioral abnormalities, is strongly linked with changes in Syn IIb expression.
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Affiliation(s)
- Elimelech Nesher
- 1] Department of Molecular Biology. Ariel University, Ariel. Israel [2] Faculty of Life Sciences. Bar-Ilan University, Ramat Gan. Israel
| | - Igor Koman
- Department of Molecular Biology. Ariel University, Ariel. Israel
| | - Moshe Gross
- Department of Molecular Biology. Ariel University, Ariel. Israel
| | - Tatiana Tikhonov
- Department of Molecular Biology. Ariel University, Ariel. Israel
| | | | | | - Yishai Levin
- de Botton Institute for Protein Profiling, The Nancy and Stephen Grand Israel National Center for Personalized Medicine. Weizmann Institute of Science, Rehovot. Israel
| | - Gabi Gerlitz
- Department of Molecular Biology. Ariel University, Ariel. Israel
| | - Izhak Michaelevski
- 1] Department of Biochemistry and Molecular Biology. Tel-Aviv University, Tel-Aviv. Israel [2] Sagol School of Neuroscience, Tel-Aviv University, Tel-Aviv. Israel
| | - Gal Yadid
- Faculty of Life Sciences. Bar-Ilan University, Ramat Gan. Israel
| | - Albert Pinhasov
- Department of Molecular Biology. Ariel University, Ariel. Israel
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Yamamoto Y, Ueyama T, Ito T, Tsuruo Y. Downregulation of growth hormone 1 gene in the cerebellum and prefrontal cortex of rats with depressive-like behavior. Physiol Genomics 2015; 47:170-6. [DOI: 10.1152/physiolgenomics.00119.2014] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2014] [Accepted: 02/19/2015] [Indexed: 11/22/2022] Open
Abstract
Depressive-like behaviors in animals are usually assessed by standardized behavioral tests such as the forced swimming test (FST). However, individual variation in test performance may obscure group differences and thereby hinder the discovery of genes responsible for depression. Few reports have shown the influence of individual variability in identifying the genes associated with depressive-like behaviors. In this study, we conducted microarray analysis to identify genes differentially expressed in the prefrontal cortex (PFC) and cerebellum of rats stratified by FST immobility ratio (% immobility in 5 min) into a control group [immobility ratio: −1 to +1 standard deviation (SD) from the mean] and a depressive group (immobility ratio: +1 to +2 SDs above the mean). Genes differentially expressed in both the cerebellum and PFC of the depressive group were Alas2, Gh1, Hba-a2, Hbb, Hbb-b1, Hbe2, LOC689064, Mrps10, Mybpc, Olf6415, and Pfkb1. Ingenuity Pathway Analysis identified Gh1 as a hub gene in the networks of differentially expressed genes in both brain regions. This study indicates that the depressive-like behavior may be related to the decrease of Gh1 expression in the cerebellum and PFC.
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Affiliation(s)
- Yuta Yamamoto
- Department of Anatomy and Cell Biology, Wakayama Medical University School of Medicine, Wakayama, Japan
| | - Takashi Ueyama
- Department of Anatomy and Cell Biology, Wakayama Medical University School of Medicine, Wakayama, Japan
| | - Takao Ito
- Department of Anatomy and Cell Biology, Wakayama Medical University School of Medicine, Wakayama, Japan
| | - Yoshihiro Tsuruo
- Department of Anatomy and Cell Biology, Wakayama Medical University School of Medicine, Wakayama, Japan
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Benner S, Endo T, Kakeyama M, Tohyama C. Environmental insults in early life and submissiveness later in life in mouse models. Front Neurosci 2015; 9:91. [PMID: 25873851 PMCID: PMC4379894 DOI: 10.3389/fnins.2015.00091] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2014] [Accepted: 03/04/2015] [Indexed: 01/12/2023] Open
Abstract
Dominant and subordinate dispositions are not only determined genetically but also nurtured by environmental stimuli during neuroendocrine development. However, the relationship between early life environment and dominance behavior remains elusive. Using the IntelliCage-based competition task for group-housed mice, we have previously described two cases in which environmental insults during the developmental period altered the outcome of dominance behavior later in life. First, mice that were repeatedly isolated from their mother and their littermates (early deprivation; ED), and second, mice perinatally exposed to an environmental pollutant, dioxin, both exhibited subordinate phenotypes, defined by decreased occupancy of limited resource sites under highly competitive circumstances. Similar alterations found in the cortex and limbic area of these two models are suggestive of the presence of neural systems shared across generalized dominance behavior.
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Affiliation(s)
- Seico Benner
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo Tokyo, Japan
| | - Toshihiro Endo
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo Tokyo, Japan ; Department of Neurochemistry, Graduate School of Medicine, The University of Tokyo Tokyo, Japan
| | - Masaki Kakeyama
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo Tokyo, Japan ; Department of Neurobiology and Behavior, Nagasaki University Nagasaki, Japan
| | - Chiharu Tohyama
- Laboratory of Environmental Health Sciences, Center for Disease Biology and Integrative Medicine, Graduate School of Medicine, The University of Tokyo Tokyo, Japan
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Investigating the mechanism(s) underlying switching between states in bipolar disorder. Eur J Pharmacol 2015; 759:151-62. [PMID: 25814263 DOI: 10.1016/j.ejphar.2015.03.019] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 03/03/2015] [Accepted: 03/12/2015] [Indexed: 12/12/2022]
Abstract
Bipolar disorder (BD) is a unique disorder that transcends domains of function since the same patient can exhibit depression or mania, states with polar opposite mood symptoms. During depression, people feel helplessness, reduced energy, and risk aversion, while with mania behaviors include grandiosity, increased energy, less sleep, and risk preference. The neural mechanism(s) underlying each state are gaining clarity, with catecholaminergic disruption seen during mania, and cholinergic dysfunction during depression. The fact that the same patient cycles/switches between these states is the defining characteristic of BD however. Of greater importance therefore, is the mechanism(s) underlying cycling from one state - and its associated neural changes - to another, considered the 'holy grail' of BD research. Herein, we review studies investigating triggers that induce switching to these states. By identifying such triggers, researchers can study neural mechanisms underlying each state and importantly how such mechanistic changes can occur in the same subject. Current animal models of this switch are also discussed, from submissive- and dominant-behaviors to kindling effects. Focus however, is placed on how seasonal changes can induce manic and depressive states in BD sufferers. Importantly, changing photoperiod lengths can induce local switches in neurotransmitter expression in normal animals, from increased catecholaminergic expression during periods of high activity, to increased somatostatin and corticotrophin releasing factor during periods of low activity. Identifying susceptibilities to this switch would enable the development of targeted animal models. From animal models, targeted treatments could be developed and tested that would minimize the likelihood of switching.
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Freudenberg F, Celikel T, Reif A. The role of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors in depression: central mediators of pathophysiology and antidepressant activity? Neurosci Biobehav Rev 2015; 52:193-206. [PMID: 25783220 DOI: 10.1016/j.neubiorev.2015.03.005] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Revised: 02/23/2015] [Accepted: 03/06/2015] [Indexed: 12/27/2022]
Abstract
Depression is a major psychiatric disorder affecting more than 120 million people worldwide every year. Changes in monoaminergic transmitter release are suggested to take part in the pathophysiology of depression. However, more recent experimental evidence suggests that glutamatergic mechanisms might play a more central role in the development of this disorder. The importance of the glutamatergic system in depression was particularly highlighted by the discovery that N-methyl-D-aspartate (NMDA) receptor antagonists (particularly ketamine) exert relatively long-lasting antidepressant like effects with rapid onset. Importantly, the antidepressant-like effects of NMDA receptor antagonists, but also other antidepressants (both classical and novel), require activation of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptors. Additionally, expression of AMPA receptors is altered in patients with depression. Moreover, preclinical evidence supports an important involvement of AMPA receptor-dependent signaling and plasticity in the pathophysiology and treatment of depression. Here we summarize work published on the involvement of AMPA receptors in depression and discuss a possible central role for AMPA receptors in the pathophysiology, course and treatment of depression.
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Affiliation(s)
- Florian Freudenberg
- Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Frankfurt, Heinrich-Hoffmann-Straße 10, 60528 Frankfurt am Main, Germany.
| | - Tansu Celikel
- Department of Neurophysiology, Donders Center for Neuroscience, Radboud University Nijmegen, 6500 AA Nijmegen, The Netherlands
| | - Andreas Reif
- Department of Psychiatry, Psychosomatics and Psychotherapy, University Hospital of Frankfurt, Heinrich-Hoffmann-Straße 10, 60528 Frankfurt am Main, Germany
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Gross M, Sheinin A, Nesher E, Tikhonov T, Baranes D, Pinhasov A, Michaelevski I. Early onset of cognitive impairment is associated with altered synaptic plasticity and enhanced hippocampal GluA1 expression in a mouse model of depression. Neurobiol Aging 2015; 36:1938-52. [PMID: 25796132 DOI: 10.1016/j.neurobiolaging.2015.02.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2014] [Revised: 02/09/2015] [Accepted: 02/13/2015] [Indexed: 10/24/2022]
Abstract
Memory deficit is a common manifestation of age-related cognitive impairment, of which depression is a frequently occurring comorbidity. Previously, we developed a submissive (Sub) mouse line, validated as a model of depressive-like behavior. Using learning paradigms testing hippocampus-dependent spatial and nonspatial memory, we demonstrate here that Sub mice developed cognitive impairments at earlier age (3 months), compared with wild-type mice. Furthermore, acute hippocampal slices from Sub animals failed to display paired-pulse facilitation, whereas primed burst stimulation elicited significantly enhanced long-term potentiation in region CA1, relative to control mice. Changes in synaptic plasticity were accompanied by markedly reduced hippocampal messenger RNA expression of insulin-like growth factor and brain-derived neurotrophic factor. Finally, we identified markedly elevated protein levels of the α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor subunit GluA1 in the hippocampi of Sub mice, which was exacerbated with age. Taken together, the results point to a linkage between depressive-like behavior and the susceptibility to develop age-related cognitive impairment, potentially by hippocampal α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor-mediated glutamatergic signaling.
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Affiliation(s)
- Moshe Gross
- Department of Biochemistry and Molecular Biology, Tel Aviv University, Tel Aviv, Israel
| | - Anton Sheinin
- Department of Biochemistry and Molecular Biology, Tel Aviv University, Tel Aviv, Israel; Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
| | - Elimelech Nesher
- Department of Molecular Biology, Ariel University, Ariel, Israel
| | - Tatiana Tikhonov
- Department of Molecular Biology, Ariel University, Ariel, Israel
| | - Danny Baranes
- Department of Molecular Biology, Ariel University, Ariel, Israel
| | - Albert Pinhasov
- Department of Molecular Biology, Ariel University, Ariel, Israel
| | - Izhak Michaelevski
- Department of Biochemistry and Molecular Biology, Tel Aviv University, Tel Aviv, Israel; Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel.
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Lukas M, de Jong TR. Conspecific Interactions in Adult Laboratory Rodents: Friends or Foes? Curr Top Behav Neurosci 2015; 30:3-24. [PMID: 27240675 DOI: 10.1007/7854_2015_428] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Interactions between adult conspecifics, including sexual behaviors, affiliation, and aggression are crucial for the well-being, survival, and reproduction of mammals. This holds true for any mammalian species, but certainly for humans: An inability to optimally navigate the social system can have a strong negative impact on physical and mental health. Translational rodent models have been used for decades to unravel the neural pathways and substrates involved in normal and abnormal conspecific interactions. Researchers in the field of translational social neuroscience face a double challenge: Not only do they need to pay considerable attention to the behavioral ecology of their model species or their ancestors, they also have to expect a relatively large variability in behavior and adjust their experimental design accordingly. In this chapter, we will lay out traditional and novel rodent models and paradigms to study sexual, affiliative, and aggressive interactions among adult conspecifics. We will discuss the merits and main findings and briefly consider the most promising novel directions. Finally, we review the modulatory involvement of two major players in mammal social interaction: the central oxytocin and vasopressin system.
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Affiliation(s)
- Michael Lukas
- Molecular and Behavioral Neurobiology, University of Regensburg, Regensburg, Germany.
| | - Trynke R de Jong
- Molecular and Behavioral Neurobiology, University of Regensburg, Regensburg, Germany
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Cumming MJ, Thompson MA, McCormick CM. Adolescent social instability stress increases aggression in a food competition task in adult male Long-Evans rats. Dev Psychobiol 2014; 56:1575-88. [PMID: 25176514 DOI: 10.1002/dev.21252] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Accepted: 08/05/2014] [Indexed: 12/19/2022]
Abstract
Adolescent social instability stress (SS; daily 1 hr isolation + new cage partners postnatal days 30-45; thereafter with original cage partner, also in the SS condition) and control (CTL) rats competed for access to a preferred food in five sessions against their cage partner. In the first session, SS pairs displayed more aggression (face whacks, p = .02; rear attacks, p = .03), were less likely to relinquish access to the food voluntarily (p = .03), spent more time at the feeder than CTL pairs (p = .06), but did not differ in latency to access the feeder (p = .41). Pairs were considered in dominant-submissive relationships (DSR) if one rat spent significantly more time at the feeder than the other; 8 of 12 SS and 8 of 12 CTL pairs displayed DSRs (remaining: no-DSR). Aggression increased from the 1st to 5th session (p < .001), was greater in no-DSR than DSR pairs (p = .04; consistent with the proposed function of DSRs to be the reduction of aggression in groups), and was higher in SS than CTL pairs (p = .05). Because the increased aggression of SS compared with CTL pairs did not result in a significant increase in their time at the feeder, the increased aggression may be considered maladaptive, and may reflect an increased motivation for food reward. These results add to evidence that SS in adolescence modifies the adult social repertoire of rats and highlight the importance of adolescent social experiences for adult behavior.
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Affiliation(s)
- Mark J Cumming
- Centre for Neuroscience, Brock University, 500 Glenridge Avenue, St. Catharines, Ontario, Canada, L2S 3A1
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Wei S, Ji XW, Wu CL, Li ZF, Sun P, Wang JQ, Zhao QT, Gao J, Guo YH, Sun SG, Qiao MQ. Resident intruder paradigm-induced aggression relieves depressive-like behaviors in male rats subjected to chronic mild stress. Med Sci Monit 2014; 20:945-52. [PMID: 24911067 PMCID: PMC4067422 DOI: 10.12659/msm.890200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Background Accumulating epidemiological evidence shows that life event stressors are major vulnerability factors for psychiatric diseases such as major depression. It is also well known that the resident intruder paradigm (RIP) results in aggressive behavior in male rats. However, it is not known how resident intruder paradigm-induced aggression affects depressive-like behavior in isolated male rats subjected to chronic mild stress (CMS), which is an animal model of depression. Material/Methods Male Wistar rats were divided into 3 groups: non-stressed controls, isolated rats subjected to the CMS protocol, and resident intruder paradigm-exposed rats subjected to the CMS protocol. Results In the sucrose intake test, ingestion of a 1% sucrose solution by rats in the CMS group was significantly lower than in control and CMS+RIP rats after 3 weeks of stress. In the open-field test, CMS rats had significantly lower open-field scores compared to control rats. Furthermore, the total scores given the CMS group were significantly lower than in the CMS+RIP rats. In the forced swimming test (FST), the immobility times of CMS rats were significantly longer than those of the control or CMS+RIP rats. However, no differences were observed between controls and CMS+RIP rats. Conclusions Our data show that aggressive behavior evoked by the resident intruder paradigm could relieve broad-spectrum depressive-like behaviors in isolated adult male rats subjected to CMS.
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Affiliation(s)
- Sheng Wei
- Laboratory of Traditional Chinese Medicine Classical Theory, Ministry of Education, Shandong University of Traditional Chinese Medicine, Jinan, China (mainland)
| | - Xiao-wei Ji
- Second Affiliated Hospita, Shandong University of Traditional Chinese Medicine/Shandong Provincial Hospital of Integrated Medicine, Jinan, China (mainland)
| | | | - Zi-fa Li
- Laboratory of Behavioral Brain Analysis, Shandong University of Traditional Chinese Medicine, Jinan, China (mainland)
| | - Peng Sun
- Laboratory of Traditional Chinese Medicine Classical Theory, Ministry of Education, Shandong University of Traditional Chinese Medicine, Jinan, China (mainland)
| | - Jie-qiong Wang
- Laboratory of Traditional Chinese Medicine Classical Theory, Ministry of Education, Shandong University of Traditional Chinese Medicine, Jinan, China (mainland)
| | - Qi-tao Zhao
- Laboratory of Traditional Chinese Medicine Classical Theory, Ministry of Education, Shandong University of Traditional Chinese Medicine, Jinan, China (mainland)
| | - Jie Gao
- Laboratory of Traditional Chinese Medicine Classical Theory, Ministry of Education, Shandong University of Traditional Chinese Medicine, Jinan, China (mainland)
| | - Ying-hui Guo
- Laboratory of Traditional Chinese Medicine Classical Theory, Ministry of Education, Shandong University of Traditional Chinese Medicine, Jinan, China (mainland)
| | - Shi-guang Sun
- Laboratory of Behavioral Brain Analysis, Shandong University of Traditional Chinese Medicine, Jinan, China (mainland)
| | - Ming-qi Qiao
- Laboratory of Traditional Chinese Medicine Classical Theory, Ministry of Education, Shandong University of Traditional Chinese Medicine, Jinan, China (mainland)
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Singhal G, Jaehne EJ, Corrigan F, Baune BT. Cellular and molecular mechanisms of immunomodulation in the brain through environmental enrichment. Front Cell Neurosci 2014; 8:97. [PMID: 24772064 PMCID: PMC3982075 DOI: 10.3389/fncel.2014.00097] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Accepted: 03/14/2014] [Indexed: 11/17/2022] Open
Abstract
Recent studies on environmental enrichment (EE) have shown cytokines, cellular immune components [e.g., T lymphocytes, natural killer (NK) cells], and glial cells in causal relationship to EE in bringing out changes to neurobiology and behavior. The purpose of this review is to evaluate these neuroimmune mechanisms associated with neurobiological and behavioral changes in response to different EE methods. We systematically reviewed common research databases. After applying all inclusion and exclusion criteria, 328 articles remained for this review. Physical exercise (PE), a form of EE, elicits anti-inflammatory and neuromodulatory effects through interaction with several immune pathways including interleukin (IL)-6 secretion from muscle fibers, reduced expression of Toll-like receptors on monocytes and macrophages, reduced secretion of adipokines, modulation of hippocampal T cells, priming of microglia, and upregulation of mitogen-activated protein kinase phosphatase-1 in central nervous system. In contrast, immunomodulatory roles of other enrichment methods are not studied extensively. Nonetheless, studies showing reduction in the expression of IL-1β and tumor necrosis factor-α in response to enrichment with novel objects and accessories suggest anti-inflammatory effects of novel environment. Likewise, social enrichment, though considered a necessity for healthy behavior, results in immunosuppression in socially defeated animals. This has been attributed to reduction in T lymphocytes, NK cells and IL-10 in subordinate animals. EE through sensory stimuli has been investigated to a lesser extent and the effect on immune factors has not been evaluated yet. Discovery of this multidimensional relationship between immune system, brain functioning, and EE has paved a way toward formulating environ-immuno therapies for treating psychiatric illnesses with minimal use of pharmacotherapy. While the immunomodulatory role of PE has been evaluated extensively, more research is required to investigate neuroimmune changes associated with other enrichment methods.
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Affiliation(s)
- Gaurav Singhal
- Psychiatric Neuroscience Lab, Discipline of Psychiatry, School of Medicine, University of AdelaideAdelaide, SA, Australia
| | - Emily J. Jaehne
- Psychiatric Neuroscience Lab, Discipline of Psychiatry, School of Medicine, University of AdelaideAdelaide, SA, Australia
| | - Frances Corrigan
- Discipline of Anatomy and Physiology, School of Medical Sciences, University of AdelaideAdelaide, SA, Australia
| | - Bernhard T. Baune
- Psychiatric Neuroscience Lab, Discipline of Psychiatry, School of Medicine, University of AdelaideAdelaide, SA, Australia
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Nonverbal dominance behavior among individuals at risk for mania. J Affect Disord 2014; 159:133-8. [PMID: 24679401 DOI: 10.1016/j.jad.2014.02.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2014] [Accepted: 02/03/2014] [Indexed: 11/23/2022]
Abstract
BACKGROUND Research suggests that people with bipolar disorder may be highly motivated to attain dominance and may over-estimate their social power (Johnson and Carver, 2012). This manic temperament may provide an adaptive advantage in the pursuit of dominance and leadership (Akiskal and Akiskal, 1992). It was hypothesized that people at high risk for bipolar disorder, as defined by the Hypomanic Personality Scale (HPS), would fail to assume a submissive role when it was appropriate to do so. METHOD Participants (81 undergraduates) completed an image description task with a confederate. Participants were randomly assigned to interact with a confederate who assumed one of three nonverbal postures: dominant (expanded), neutral, or submissive (constricted). Nonverbal dominance behavior was defined as the rate at which participants expanded their body span during the task. RESULTS Consistent with hypotheses, an ANOVA indicated an interaction of Mania risk x Dominance condition on body expansion. Whereas participants with low mania risk (HPS scores) adapted complementary behavior in response to the confederate, participants with high mania risk demonstrated a consistently dominant (expanded) nonverbal posture. LIMITATIONS A major limitation of this study is the use of an analog measure of mania risk in place of clinical diagnoses. CONCLUSIONS In this experiment, participants at high risk for mania maintained a dominant posture even when submissiveness would have been more appropriate. It is argued that persistent dominance behavior may play an important role in the interpersonal interactions of individuals at risk for bipolar disorder.
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Meduri JD, Farnbauch LA, Jasnow AM. Paradoxical enhancement of fear expression and extinction deficits in mice resilient to social defeat. Behav Brain Res 2013; 256:580-90. [PMID: 24029700 DOI: 10.1016/j.bbr.2013.09.009] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 08/07/2013] [Accepted: 09/02/2013] [Indexed: 01/19/2023]
Abstract
The exposure to stress has been associated with increased depressive and anxiety symptoms, yet not all individuals respond negatively to the experience of stress. Recent rodent social defeat models demonstrate similar individual differences in response to social stress. In particular, mice subjected to chronic social defeat have been characterized as being either "susceptible" or "resilient" by the level of social interaction following social defeat. Susceptibility is associated with lasting social avoidance as well as increased anxiety-like behavior, and depressive-like symptoms. Resilient animals, however, do not show social avoidance or increased depressive-like symptoms, but retain increased anxiety-like behavior. Thus, it is unclear what "resilience" as measured by social interaction represents in terms of an overall behavioral and physiological phenotype. Here, we use an acute social defeat procedure, which produces distinct behavioral phenotypes in social interaction with no apparent changes in anxiety-like behavior. Susceptible mice display lasting social avoidance, whereas resilient mice display normal social interaction. Susceptible mice also displayed deficits in fear extinction retention but had normal within-session extinction. Paradoxically, resilience was associated with enhanced fear expression, and severe deficits in fear extinction and extinction retention beyond that observed in susceptible mice. These effects in resilient mice were only apparent after the experience of social stress and were not due to impaired behavioral flexibility. These data suggest that mechanisms controlling resilience to acute social defeat as characterized by social interaction leave animals vulnerable to maladaptive fear behavior.
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Affiliation(s)
- Jeremy D Meduri
- Department of Psychology, Kent State University, 230 Kent Hall, Kent, OH 44242, USA.
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Effects of chronic social defeat stress on behaviour, endoplasmic reticulum proteins and choline acetyltransferase in adolescent mice. Int J Neuropsychopharmacol 2013; 16:1635-47. [PMID: 23442729 DOI: 10.1017/s1461145713000060] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023] Open
Abstract
The present study investigated the effects of social defeat stress on the behaviours and expressions of 78-kDa glucose-regulated protein (Grp78), CCAAT/enhancer-binding protein (C/EBP) homologous protein (CHOP) and choline acetyltransferase (Chat) in the brains of adolescent mice. Adolescent male C57BL/6J mice were divided into two groups (susceptible and unsusceptible) after 10 d social defeat stress. In expt 1, behavioural tests were conducted and brains were processed for Western blotting on day 21 after stress. In expt 2, social avoidance tests were conducted and brains were subsequently processed for Western blotting on day 12 after stress. Chronic social defeat stress produced more pronounced depression-like behaviours such as decreased locomotion and social interaction, increased anxiety-like behaviours and immobility, and impaired memory performance in susceptible mice. Moreover, susceptible mice showed greater expression of Grp78 and CHOP in the amygdala (Amyg) on days 12 and 21 compared with the other groups. Susceptible and unsusceptible groups showed significant increases in Grp78 and CHOP expression in the prefrontal cortex (PFC) and hippocampus (Hipp) on day 12 compared with the control group; this persisted until day 21. The levels of Chat measured on days 12 and 21 were significantly lower in the PFC, Amyg and Hipp of all defeated mice compared with controls. The findings of the behavioural tests indicate that chronic social defeat in adolescents produces anxiety-like behaviours, social withdrawal, despair-like behaviours and cognitive impairment. The Grp78, CHOP and Chat results suggest that the selective response of endoplasmic reticulum stress proteins in the Amyg plays an important role in the vulnerability-stress model of depression.
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