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Mélo RMF, Barbosa RS, Ozório VL, Oliveira GM, Horita SIM, Henriques-Pons A, Araújo-Jorge TC, Fragoso VMS. Influence of leptin and its receptors on individuals under chronic social stress behavior. Front Endocrinol (Lausanne) 2024; 15:1281135. [PMID: 38362276 PMCID: PMC10867138 DOI: 10.3389/fendo.2024.1281135] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Accepted: 01/17/2024] [Indexed: 02/17/2024] Open
Abstract
Stress is the body's physiological reaction to a dangerous or threatening situation, leading to a state of alertness. This reaction is necessary for developing an effective adaptive response to stress and maintaining the body's homeostasis. Chronic stress, caused mainly by social stress, is what primarily affects the world's population. In the last decades, the emergence of psychological disorders in humans has become more frequent, and one of the symptoms that can be observed is aggressiveness. In the brain, stress can cause neuronal circuit alterations related to the action of hormones in the central nervous system. Leptin, for example, is a hormone capable of acting in brain regions and neuronal circuits important for behavioral and emotional regulation. This study investigated the correlation between chronic social stress, neuroendocrine disorders, and individual behavioral changes. Then, leptin and its receptors' anatomical distribution were evaluated in the brains of mice subjected to a protocol of chronic social stress. The model of spontaneous aggression (MSA) is based on grouping young mice and posterior regrouping of the same animals as adults. According to the regrouping social stress, we categorized the mice into i) harmonic, ii) attacked, and iii) aggressive animals. For leptin hormone evaluation, we quantified plasma and brain concentrations by ELISA and evaluated its receptor and isoform expression by western blotting. Moreover, we verified whether stress or changes in leptin levels interfered with the animal's body weight. Only attacked animals showed reduced plasma leptin concentration and weight gain, besides a higher expression of the high-molecular-weight leptin receptor in the amygdala and the low-molecular-weight receptor in the hippocampal region. Aggressive animals showed a reduction in the cerebral concentration of leptin in the hippocampus and a reduced high-and low-molecular-weight leptin receptor expression in the amygdala. The harmonic animals showed a reduction in the cerebral concentration of leptin in the pituitary and a reduced expression of the high-molecular-weight leptin receptor in the amygdala. We then suggest that leptin and its receptors' expression in plasma and specific brain areas are involved in how individuals react in stressful situations, such as regrouping stress in MSA.
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Affiliation(s)
- Renata M. F. Mélo
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Rafaela S. Barbosa
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Victória L. Ozório
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Gabriel M. Oliveira
- Laboratory of Cell Biology, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Samuel I. M. Horita
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
- Laboratory on Thymus Research, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Andrea Henriques-Pons
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Tânia C. Araújo-Jorge
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
| | - Viviane M. S. Fragoso
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, RJ, Brazil
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Antón-Galindo E, Cabana-Domínguez J, Torrico B, Corominas R, Cormand B, Fernàndez-Castillo N. The pleiotropic contribution of genes in dopaminergic and serotonergic pathways to addiction and related behavioral traits. Front Psychiatry 2023; 14:1293663. [PMID: 37937232 PMCID: PMC10627163 DOI: 10.3389/fpsyt.2023.1293663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/13/2023] [Accepted: 09/28/2023] [Indexed: 11/09/2023] Open
Abstract
Introduction Co-occurrence of substance use disorders (SUD) and other behavioral conditions, such as stress-related, aggressive or risk-taking behaviors, in the same individual has been frequently described. As dopamine (DA) and serotonin (5-HT) have been previously identified as key neurotransmitters for some of these phenotypes, we explored the genetic contribution of these pathways to SUD and these comorbid phenotypes in order to better understand the genetic relationship between them. Methods We tested the association of 275 dopaminergic genes and 176 serotonergic genes with these phenotypes by performing gene-based, gene-set and transcriptome-wide association studies in 11 genome-wide association studies (GWAS) datasets on SUD and related behaviors. Results At the gene-wide level, 68 DA and 27 5-HT genes were found to be associated with at least one GWAS on SUD or related behavior. Among them, six genes had a pleiotropic effect, being associated with at least three phenotypes: ADH1C, ARNTL, CHRNA3, HPRT1, HTR1B and DRD2. Additionally, we found nominal associations between the DA gene sets and SUD, opioid use disorder, antisocial behavior, irritability and neuroticism, and between the 5-HT-core gene set and neuroticism. Predicted gene expression correlates in brain were also found for 19 DA or 5-HT genes. Discussion Our study shows a pleiotropic contribution of dopaminergic and serotonergic genes to addiction and related behaviors such as anxiety, irritability, neuroticism and risk-taking behavior, highlighting a role for DA genes, which could explain, in part, the co-occurrence of these phenotypes.
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Affiliation(s)
- Ester Antón-Galindo
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain
- Institut de Biomedicina de la Universitat de Barcelona, Barcelona, Spain
- Institut de Recerca Sant Joan de Déu, Barcelona, Spain
| | - Judit Cabana-Domínguez
- Psychiatric Genetics Unit, Group of Psychiatry, Mental Health and Addiction, Vall d'Hebron Research Institute (VHIR), Universitat Autònoma de Barcelona, Barcelona, Spain
- Department of Mental Health, Hospital Universitari Vall d'Hebron, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Madrid, Spain
| | - Bàrbara Torrico
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
| | - Roser Corominas
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain
- Institut de Biomedicina de la Universitat de Barcelona, Barcelona, Spain
- Institut de Recerca Sant Joan de Déu, Barcelona, Spain
| | - Bru Cormand
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain
- Institut de Biomedicina de la Universitat de Barcelona, Barcelona, Spain
- Institut de Recerca Sant Joan de Déu, Barcelona, Spain
| | - Noèlia Fernàndez-Castillo
- Departament de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain
- Institut de Biomedicina de la Universitat de Barcelona, Barcelona, Spain
- Institut de Recerca Sant Joan de Déu, Barcelona, Spain
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Dwortz MF, Curley JP, Tye KM, Padilla-Coreano N. Neural systems that facilitate the representation of social rank. Philos Trans R Soc Lond B Biol Sci 2022; 377:20200444. [PMID: 35000438 PMCID: PMC8743891 DOI: 10.1098/rstb.2020.0444] [Citation(s) in RCA: 25] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2021] [Accepted: 11/10/2021] [Indexed: 12/15/2022] Open
Abstract
Across species, animals organize into social dominance hierarchies that serve to decrease aggression and facilitate survival of the group. Neuroscientists have adopted several model organisms to study dominance hierarchies in the laboratory setting, including fish, reptiles, rodents and primates. We review recent literature across species that sheds light onto how the brain represents social rank to guide socially appropriate behaviour within a dominance hierarchy. First, we discuss how the brain responds to social status signals. Then, we discuss social approach and avoidance learning mechanisms that we propose could drive rank-appropriate behaviour. Lastly, we discuss how the brain represents memories of individuals (social memory) and how this may support the maintenance of unique individual relationships within a social group. This article is part of the theme issue 'The centennial of the pecking order: current state and future prospects for the study of dominance hierarchies'.
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Affiliation(s)
- Madeleine F. Dwortz
- Department of Psychology, University of Texas at Austin, Austin, TX 78712, USA
- Institute for Neuroscience, University of Texas at Austin, Austin, TX 78712, USA
| | - James P. Curley
- Department of Psychology, University of Texas at Austin, Austin, TX 78712, USA
| | - Kay M. Tye
- Systems Neuroscience Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
| | - Nancy Padilla-Coreano
- Systems Neuroscience Laboratory, Salk Institute for Biological Studies, La Jolla, CA 92037, USA
- Department of Neuroscience, University of Florida, Gainesville, FN 32611, USA
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Felippe RM, Oliveira GM, Barbosa RS, Esteves BD, Gonzaga BMS, Horita SIM, Garzoni LR, Beghini DG, Araújo-Jorge TC, Fragoso VMS. Experimental Social Stress: Dopaminergic Receptors, Oxidative Stress, and c-Fos Protein Are Involved in Highly Aggressive Behavior. Front Cell Neurosci 2021; 15:696834. [PMID: 34489642 PMCID: PMC8418094 DOI: 10.3389/fncel.2021.696834] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Accepted: 07/27/2021] [Indexed: 11/18/2022] Open
Abstract
Aggression is defined as hostile behavior that results in psychological damage, injury and even death among individuals. When aggression presents itself in an exacerbated and constant way, it can be considered escalating or pathological. The association between social stress and the emergence of exacerbated aggressiveness is common and is suggested to be interconnected through very complex neurobiological factors. For example, alterations in the expression of the dopaminergic receptors D1 and D2, reactive oxygen species (ROS) and the c-Fos protein in the cortex have been observed. Our objective was to analyze which factors are involved at the neurobiological level in the highly aggressive response of Swiss Webster adult male mice in a vivarium. In this work, we investigated the relationship among dopaminergic receptors, the production of ROS and the expression of c-Fos. Mice with exacerbated aggression were identified by the model of spontaneous aggression (MSA) based on the grouping of young mice and the regrouping of the same animals in adulthood. During the regrouping, we observed different categories of behavior resulting from social stress, such as (i) highly aggressive animals, (ii) defeated animals, and (iii) harmonic groups. To evaluate the dopaminergic system and the c-Fos protein, we quantified the expression of D1 and D2 dopaminergic receptors by Western blotting and fluorescence immunohistochemistry and that of the c-Fos protein by fluorescence immunohistochemistry. The possible production of ROS was also evaluated through the dihydroethidium (DHE) assay. The results showed that aggressive and subordinate mice showed a reduction in the expression of the D1 receptor, and no significant difference in the expression of the D2 receptor was observed between the groups. In addition, aggressive mice exhibited increased production of ROS and c-Fos protein. Based on our results, we suggest that exacerbated aggression is associated with social stress, dysregulation of the dopaminergic system and exacerbated ROS production, which leads to a state of cellular oxidative stress. The overexpression of c-Fos due to social stress suggests an attempt by the cell to produce antioxidant agents to reduce the toxic cellular concentration of ROS.
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Affiliation(s)
- Renata M Felippe
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Gabriel M Oliveira
- Laboratory of Cell Biology, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Rafaela S Barbosa
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Betina D Esteves
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Beatriz M S Gonzaga
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Samuel I M Horita
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil.,Laboratory on Thymus Research, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Luciana R Garzoni
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Daniela G Beghini
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Tânia C Araújo-Jorge
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Viviane M S Fragoso
- Laboratory of Innovations in Therapies, Education and Bioproducts, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
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Coura CPDM, Fragoso VMDS, Valdez ECN, Paulino ET, Silva D, Cortez CM. Study on the interaction of three classical drugs used in psychiatry in albumin through spectrofluorimetric modeling. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 255:119638. [PMID: 33780894 DOI: 10.1016/j.saa.2021.119638] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/13/2020] [Revised: 12/16/2020] [Accepted: 02/19/2021] [Indexed: 06/12/2023]
Abstract
Comparative study of haloperidol (HPD), biperiden (BPD) and clonazepam (CNZ) interactions with human and bovine serum albumin was performed based on fluorescence quenching analysis. We used mathematical modeling comparing spectrofluorimetric data to obtain information on the possibility of competition among three drugs by sites binding. Results showed that the three drugs studied have high affinity for albumin and suggest the existence of two site classes in HSA for HPD and only one class for BPD and CNZ, in the range of concentrations tested for each drug. Among them, only HPD forms complex with HSA. Comparing normalized quenching plots suggested that the primary sites in HSA and BSA for HPD and CNZ are located at subdomain IB, whereas BPD would bind in the subdomain IIA. Considering the competition for binding sites in HSA, titrations of HPD-HSA complex by BPD and CNZ, as well as the titration of HSA solution containing CNZ titrated by BPD, show that although the three drugs do not compete with each other for binding sites, their interaction with HSA can cause conformational change in the protein, and to increase or decrease the accessibility to binding sites for other drug. This may mean alteration in the free plasma drug concentrations.
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Affiliation(s)
| | - Viviane Muniz da Silva Fragoso
- Laboratory of Innovations in Therapies, Education and Bioproducts, Oswaldo Cruz Institute/FIOCRUZ, Av. Brasil 4365, Rio de Janeiro 21045-900, Brazil.
| | | | - Erica Tex Paulino
- Laboratory of Innovations in Therapies, Education and Bioproducts, Oswaldo Cruz Institute/FIOCRUZ, Av. Brasil 4365, Rio de Janeiro 21045-900, Brazil.
| | - Dilson Silva
- Rio de Janeiro State University, Av. Manoel de Abreu, 444, Rio de Janeiro 20550-171, Brazil; Department of Applied Mathematics, Rio de Janeiro State University, Rua São Francisco Xavier, 524, Rio de Janeiro 20559-900, Brazil.
| | - Célia Martins Cortez
- Rio de Janeiro State University, Av. Manoel de Abreu, 444, Rio de Janeiro 20550-171, Brazil; Department of Applied Mathematics, Rio de Janeiro State University, Rua São Francisco Xavier, 524, Rio de Janeiro 20559-900, Brazil.
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Ibrahim TM, Eissa RG, El-Megrab NA, El-Nahas HM. Morphological characterization of optimized risperidone-loaded in-situ gel forming implants with pharmacokinetic and behavioral assessments in rats. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2020.102195] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Miranda Mendonça AP, Hoppe LY, Gaviraghi A, Araújo-Jorge TCD, de Oliveira GM, Felippe RM, Oliveira MF, da Silva Fragoso VM. Highly aggressive behavior induced by social stress is associated to reduced cytochrome c oxidase activity in mice brain cortex. Neurochem Int 2019; 126:210-217. [PMID: 30922923 DOI: 10.1016/j.neuint.2019.03.017] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 02/28/2019] [Accepted: 03/21/2019] [Indexed: 12/25/2022]
Abstract
Violence and aggression represent severe social problems, with profound impacts on public health. Despite the development of experimental models to study aggressive behavior is highly appreciated, the underlying mechanisms remain poorly understood. Given the key contribution of mitochondria to central nervous system bioenergetics, we hypothesized that mitochondrial function in brain would be altered by social stress. Using a model of spontaneous aggression, we investigated here the effects of social stress on brain mitochondrial function in prefrontal cortex of Swiss mice. Animals were categorized as highly aggressive, subordinate and non-aggressive (harmonic) after stress induced by regrouping and compared them with non-regrouped animals. Despite social stress did not affect brain cortex oxygen consumption rates and NADH:cytochrome c oxidoreductase activity, cytochrome c oxidase expression and activity were significantly lower in highly aggressive animals compared to non-regrouped ones. These changes were not observed in ATP synthase and adenine nucleotide translocator content suggesting a selective effect of social stress on cytochrome c oxidase. Therefore, aggressive behavior generated upon social stress associates to selective reduction in cytochrome c oxidase activity, with potential detrimental effects on brain bioenergetics and function.
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Affiliation(s)
- Ana Paula Miranda Mendonça
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Av. Bauhínia 400, 21941-590, Ilha do Fundão, Cidade Universitária, Rio de Janeiro, Brazil
| | - Luanda Yanaan Hoppe
- Laboratory of Innovations in Therapies, Education and Bioproducts, Instituto Oswaldo Cruz/FIOCRUZ, Av. Brasil 4365, 21045-900, Manguinhos, Rio de Janeiro, Brazil
| | - Alessandro Gaviraghi
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Av. Bauhínia 400, 21941-590, Ilha do Fundão, Cidade Universitária, Rio de Janeiro, Brazil
| | - Tânia Cremonini de Araújo-Jorge
- Laboratory of Innovations in Therapies, Education and Bioproducts, Instituto Oswaldo Cruz/FIOCRUZ, Av. Brasil 4365, 21045-900, Manguinhos, Rio de Janeiro, Brazil
| | - Gabriel Melo de Oliveira
- Laboratory of Cell Biology, Instituto Oswaldo Cruz/FIOCRUZ, Av. Brasil 4365, 21045-900, Manguinhos, Rio de Janeiro, Brazil
| | - Renata Machado Felippe
- Laboratory of Innovations in Therapies, Education and Bioproducts, Instituto Oswaldo Cruz/FIOCRUZ, Av. Brasil 4365, 21045-900, Manguinhos, Rio de Janeiro, Brazil
| | - Marcus F Oliveira
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Av. Bauhínia 400, 21941-590, Ilha do Fundão, Cidade Universitária, Rio de Janeiro, Brazil.
| | - Viviane Muniz da Silva Fragoso
- Laboratory of Innovations in Therapies, Education and Bioproducts, Instituto Oswaldo Cruz/FIOCRUZ, Av. Brasil 4365, 21045-900, Manguinhos, Rio de Janeiro, Brazil.
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Animal Models of (or for) Aggression Reward, Addiction, and Relapse: Behavior and Circuits. J Neurosci 2019; 39:3996-4008. [PMID: 30833504 DOI: 10.1523/jneurosci.0151-19.2019] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Revised: 02/18/2019] [Accepted: 02/25/2019] [Indexed: 02/06/2023] Open
Abstract
Inappropriate and pathological aggression plays a leading role in the suffering and death of millions of people, and further places an untenable strain on the caregivers and families of those afflicted. In some cases, such as addictive drugs, aggression can be highly rewarding (appetitive) and continually pursued despite short- and long-term negative consequences. Similarly, recidivism (relapse) rates for repeat violent offenders are as high as relapse rates for drug addicts. Appetitive aggression and relapse to aggression seeking can be modeled in mice studies using conditioned place preference and self-administration procedures followed by a period of abstinence and subsequent tests for relapse to aggression preference and aggression seeking. These procedures allow for the study of the mechanisms that control the appetitive versus the consummatory (attack) phases of aggressive behavior. In this review, we first discuss the behavioral procedures developed to probe appetitive aggression in mouse models, spanning from Pavlovian to operant tasks, and we also describe the recently proposed phenomenon of "aggression addiction." Next, we discuss the pharmacological and circuit mechanisms of aggression conditioned place preference and aggression self-administration, seeking, and relapse, highlighting mechanistic congruence and divergence between appetitive and consummatory phases of aggression. We conclude by discussing clinical implications of the studies reviewed.
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Nucleus Accumbens Drd1-Expressing Neurons Control Aggression Self-Administration and Aggression Seeking in Mice. J Neurosci 2019; 39:2482-2496. [PMID: 30655356 DOI: 10.1523/jneurosci.2409-18.2019] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2018] [Revised: 12/21/2018] [Accepted: 01/07/2019] [Indexed: 01/01/2023] Open
Abstract
We recently developed a mouse model of appetitive operant aggression and reported that adult male outbred CD-1 mice lever-press for the opportunity to attack subordinate male mice and relapse to aggression seeking during abstinence. Here we studied the role of nucleus accumbens (NAc) dopamine receptor (Drd)1- and Drd2-expressing neurons in aggression self-administration and aggression seeking. We trained CD-1 mice to self-administer intruders (9 d, 12 trials/d) and tested them for aggression self-administration and aggression seeking on abstinence Day 1. We used immunohistochemistry and in situ hybridization to measure the neuronal activity marker Fos in the NAc, and cell-type-specific colocalization of Fos with Drd1- and Drd2-expressing neurons. To test the causal role of Drd1- and Drd2-expressing neurons, we validated a transgenic hybrid breeding strategy crossing inbred Drd1-Cre and Drd2-Cre transgenic mice with outbred CD-1 mice and used cell-type-specific Cre-DREADD (hM4Di) to inhibit NAc Drd1- and Drd2-expressing neuron activity. We found that aggression self-administration and aggression seeking induced higher Fos expression in NAc shell than in core, that Fos colocalized with Drd1 and Drd2 in both subregions, and that chemogenetic inhibition of Drd1-, but not Drd2-, expressing neurons decreased aggression self-administration and aggression seeking. Results indicate a cell-type-specific role of Drd1-expressing neurons that is critical for both aggression self-administration and aggression seeking. Our study also validates a simple breeding strategy between outbred CD-1 mice and inbred C57-based Cre lines that can be used to study cell-type and circuit mechanisms of aggression reward and relapse.SIGNIFICANCE STATEMENT Aggression is often comorbid with neuropsychiatric diseases, including drug addiction. One form, appetitive aggression, exhibits symptomatology that mimics that of drug addiction and is hypothesized to be due to dysregulation of addiction-related reward circuits. However, our mechanistic understanding of the circuitry modulating appetitive operant aggression is limited. Here we used a novel mouse model of aggression self-administration and relapse, in combination with immunohistochemistry, in situ hybridization, and chemogenetic manipulations to examine how cell types in the nucleus accumbens are recruited for, and control, operant aggression self-administration and aggression seeking on abstinence Day 1. We found that one population, dopamine receptor 1-expressing neurons, act as a critical modulator of operant aggression reward and aggression seeking.
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Functions of medial hypothalamic and mesolimbic dopamine circuitries in aggression. Curr Opin Behav Sci 2018; 24:104-112. [PMID: 30746430 DOI: 10.1016/j.cobeha.2018.06.011] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Aggression is a crucial survival behavior: it is employed to defend territory, compete for food and mating opportunities, protect kin, and resolve disputes. Although widely differing in its behavioral expression, aggression is observed across many species. The neural substrates of aggression have been investigated for nearly a century and two highly conserved circuitries emerge as critical substrates for generating and modulating aggression. One circuitry centers on the medial hypothalamus. Activity of the medial hypothalamic cells closely correlates with attacks and can bi-directionally modulate aggressive behaviors. The other aggression-related circuit involves the mesolimbic dopamine cells. Dopaminergic antagonists are the most commonly used treatment for suppressing human aggression in psychotic patients. Animal studies support essential roles of dopaminergic signaling in the nucleus accumbens in assessing the reward value of aggression and reinforcing the aggressive behaviors. In this review, we will provide an overview regarding the functions of medial hypothalamus and dopaminergic system in mediating aggressive behaviors and the potential interactions between these two circuitries.
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Tanaka A, Furubayashi T, Arai M, Inoue D, Kimura S, Kiriyama A, Kusamori K, Katsumi H, Yutani R, Sakane T, Yamamoto A. Delivery of Oxytocin to the Brain for the Treatment of Autism Spectrum Disorder by Nasal Application. Mol Pharm 2018; 15:1105-1111. [PMID: 29338251 DOI: 10.1021/acs.molpharmaceut.7b00991] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Oxytocin (OXT) is a cyclic nonapeptide, two amino acids of which are cysteine, forming an intramolecular disulfide bond. OXT is produced in the hypothalamus and is secreted into the bloodstream from the posterior pituitary. As recent studies have suggested that OXT is a neurotransmitter exhibiting central effects important for social deficits, it has drawn much attention as a drug candidate for the treatment of autism. Although human-stage clinical trials of the nasal spray of OXT for the treatment of autism have already begun, few studies have examined the pharmacokinetics and brain distribution of OXT after nasal application. The aim of this study is to evaluate the disposition, nasal absorption, and therapeutic potential of OXT after nasal administration. The pharmacokinetics of OXT after intravenous bolus injection to rats followed a two-compartment model, with a rapid initial half-life of 3 min. The nasal bioavailability of OXT was approximately 2%. The brain concentration of OXT after nasal application was much higher than that after intravenous application, despite much lower concentrations in the plasma. More than 95% of OXT in the brain was directly transported from the nasal cavity. The in vivo stress-relief effect by OXT was observed only after intranasal administration. These results indicate that pharmacologically active OXT was effectively delivered to the brain after intranasal administration. In conclusion, the nasal cavity is a promising route for the efficient delivery of OXT to the brain.
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Affiliation(s)
- Akiko Tanaka
- Department of Biopharmaceutics , Kyoto Pharmaceutical University , Yamashina, Kyoto 607-8414 , Japan
| | | | - Mari Arai
- Department of Biopharmaceutics , Kyoto Pharmaceutical University , Yamashina, Kyoto 607-8414 , Japan
| | - Daisuke Inoue
- School of Pharmacy , Shujitsu University , Kita, Okayama 703-8516 , Japan
| | - Shunsuke Kimura
- Faculty of Pharmaceutical Sciences , Doshisha Women's College of Liberal Arts , Kodo, Kyotanabe, Kyoto 610-0395 , Japan
| | - Akiko Kiriyama
- Faculty of Pharmaceutical Sciences , Doshisha Women's College of Liberal Arts , Kodo, Kyotanabe, Kyoto 610-0395 , Japan
| | - Kosuke Kusamori
- Department of Biopharmaceutics , Kyoto Pharmaceutical University , Yamashina, Kyoto 607-8414 , Japan
| | - Hidemasa Katsumi
- Department of Biopharmaceutics , Kyoto Pharmaceutical University , Yamashina, Kyoto 607-8414 , Japan
| | - Reiko Yutani
- Department of Pharmaceutical Technology , Kobe Pharmaceutical University , Motoyamakita-machi 4-19-1 , Higashinada, Kobe 658-8558 , Japan
| | - Toshiyasu Sakane
- Department of Pharmaceutical Technology , Kobe Pharmaceutical University , Motoyamakita-machi 4-19-1 , Higashinada, Kobe 658-8558 , Japan
| | - Akira Yamamoto
- Department of Biopharmaceutics , Kyoto Pharmaceutical University , Yamashina, Kyoto 607-8414 , Japan
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van Schalkwyk GI, Lewis AS, Beyer C, Johnson J, van Rensburg S, Bloch MH. Efficacy of antipsychotics for irritability and aggression in children: a meta-analysis. Expert Rev Neurother 2017; 17:1045-1053. [PMID: 28847182 DOI: 10.1080/14737175.2017.1371012] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
BACKGROUND Aggression and irritability in children occur across a range of diagnoses, and are associated with both economic cost and negative psychosocial outcomes. Antipsychotics are frequently prescribed in these cases. METHODS A random effects meta-analysis of 14 random controlled trials was conducted. Overall effect sizes for antipsychotics for irritability and aggression were extracted. Subgroup analyses were conducted according to diagnostic indication, specific medication and degree of sedation. Meta-regression examined effects of antipsychotic dose. RESULTS Overall, antipsychotics were effective in reducing aggression and irritability (SMD = 0.74, 95% confidence interval [CI] 0.57-0.92, z = 8.4, p < 0.0001). In stratified subgroup analysis, individual antipsychotic agents did not differ in efficacy (χ2 = 1.1, df = 3, p = 0.78). However, aripiprazole and risperidone demonstrated significant benefit over placebo. Antipsychotic efficacy did not differ significantly based on diagnostic indication (χ2 = 4.2, df = 4, p = 0.39). Meta-regression showed no overall dose effect. CONCLUSIONS Clinical data supports the efficacy of risperidone and aripiprazole for aggression and irritability across diagnoses, with insufficient data available for other agents. Available data does not support a difference in efficacy based on underlying diagnosis, choice of agent, or its degree of sedation.
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Affiliation(s)
| | - Alan S Lewis
- b Department of Psychiatry , Yale University , New Haven , CT , USA
| | - Chad Beyer
- a Child Study Center , Yale University , New Haven , CT , USA
| | - Jessica Johnson
- a Child Study Center , Yale University , New Haven , CT , USA
| | - Samuel van Rensburg
- c School of Nursing , Fairfield University School of Nursing , Fairfield , CT , USA
| | - Michael H Bloch
- a Child Study Center , Yale University , New Haven , CT , USA.,b Department of Psychiatry , Yale University , New Haven , CT , USA
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