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Jones JD, Arout CA, Luba R, Murugesan D, Madera G, Gorsuch L, Schusterman R, Martinez S. The influence of drug class on reward in substance use disorders. Pharmacol Biochem Behav 2024; 240:173771. [PMID: 38670466 PMCID: PMC11162950 DOI: 10.1016/j.pbb.2024.173771] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2024] [Revised: 03/26/2024] [Accepted: 04/16/2024] [Indexed: 04/28/2024]
Abstract
In the United States, the societal costs associated with drug use surpass $500 billion annually. The rewarding and reinforcing properties that drive the use of these addictive substances are typically examined concerning the neurobiological effects responsible for their abuse potential. In this review, terms such as "abuse potential," "drug," and "addictive properties" are used due to their relevance to the methodological, theoretical, and conceptual framework for understanding the phenomenon of drug-taking behavior and the associated body of preclinical and clinical literature. The use of these terms is not intended to cast aspersions on individuals with substance use disorders (SUD). Understanding what motivates substance use has been a focus of SUD research for decades. Much of this corpus of work has focused on the shared effects of each drug class to increase dopaminergic transmission within the central reward pathways of the brain, or the "reward center." However, the precise influence of each drug class on dopamine signaling, and the extent thereof, differs considerably. Furthermore, the aforementioned substances have effects on several neurobiological targets that mediate and modulate their addictive properties. The current manuscript sought to review the influence of drug class on the rewarding effects of each of the major pharmacological classes of addictive drugs (i.e., psychostimulants, opioids, nicotine, alcohol, and cannabinoids). Our review suggests that even subtle differences in drug effects can result in significant variability in the subjective experience of the drug, altering rewarding and other reinforcing effects. Additionally, this review will argue that reward (i.e., the attractive and motivational property of a stimulus) alone is not sufficient to explain the abuse liability of these substances. Instead, abuse potential is best examined as a function of both positive and negative reinforcing drug effects (i.e., stimuli that the subject will work to attain and stimuli that the subject will work to end or avoid, respectively). Though reward is central to drug use, the factors that motivate and maintain drug taking are varied and complex, with much to be elucidated.
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Affiliation(s)
- Jermaine D Jones
- Division on Substance Use Disorders, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons, 1051 Riverside Drive, New York, NY 10032, USA.
| | - Caroline A Arout
- Division on Substance Use Disorders, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons, 1051 Riverside Drive, New York, NY 10032, USA
| | - Rachel Luba
- Division on Substance Use Disorders, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons, 1051 Riverside Drive, New York, NY 10032, USA
| | - Dillon Murugesan
- CUNY School of Medicine, 160 Convent Avenue, New York, NY 10031, USA
| | - Gabriela Madera
- Division on Substance Use Disorders, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons, 1051 Riverside Drive, New York, NY 10032, USA
| | - Liam Gorsuch
- Department of Psychiatry, The University of British Columbia, 430-5950 University Blvd., Vancouver V6T 1Z3, BC, Canada
| | - Rebecca Schusterman
- Division on Substance Use Disorders, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons, 1051 Riverside Drive, New York, NY 10032, USA
| | - Suky Martinez
- Division on Substance Use Disorders, Department of Psychiatry, Columbia University Vagelos College of Physicians and Surgeons, 1051 Riverside Drive, New York, NY 10032, USA
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Beaulieu M. Capturing wild animal welfare: a physiological perspective. Biol Rev Camb Philos Soc 2024; 99:1-22. [PMID: 37635128 DOI: 10.1111/brv.13009] [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: 03/07/2023] [Revised: 08/07/2023] [Accepted: 08/07/2023] [Indexed: 08/29/2023]
Abstract
Affective states, such as emotions, are presumably widespread across the animal kingdom because of the adaptive advantages they are supposed to confer. However, the study of the affective states of animals has thus far been largely restricted to enhancing the welfare of animals managed by humans in non-natural contexts. Given the diversity of wild animals and the variable conditions they can experience, extending studies on animal affective states to the natural conditions that most animals experience will allow us to broaden and deepen our general understanding of animal welfare. Yet, this same diversity makes examining animal welfare in the wild highly challenging. There is therefore a need for unifying theoretical frameworks and methodological approaches that can guide researchers keen to engage in this promising research area. The aim of this article is to help advance this important research area by highlighting the central relationship between physiology and animal welfare and rectify its apparent oversight, as revealed by the current scientific literature on wild animals. Moreover, this article emphasises the advantages of including physiological markers to assess animal welfare in the wild (e.g. objectivity, comparability, condition range, temporality), as well as their concomitant limitations (e.g. only access to peripheral physiological markers with complex relationships with affective states). Best-practice recommendations (e.g. replication and multifactorial approaches) are also provided to allow physiological markers to be used most effectively and appropriately when assessing the welfare of animals in their natural habitat. This review seeks to provide the foundation for a new and distinct research area with a vast theoretical and applied potential: wild animal welfare physiology.
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Affiliation(s)
- Michaël Beaulieu
- Wild Animal Initiative, 5123 W 98th St, 1204, Minneapolis, MN, 55437, USA
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Trimble EA, Kell PA, Avella MA, France CR, Rhudy JL. Opioid Receptor Mu 1 Gene (OPRM1) A118G Polymorphism and Emotional Modulation of Pain. J Pain Res 2024; 17:489-500. [PMID: 38328016 PMCID: PMC10849056 DOI: 10.2147/jpr.s442431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2023] [Accepted: 01/21/2024] [Indexed: 02/09/2024] Open
Abstract
Purpose The A118G polymorphism in the opioid receptor mu 1 gene (OPRM1) is associated with decreased opioid receptor availability, altered emotion, and increased pain. Given that emotions modulate pain (positive emotions inhibit pain, negative emotions enhance pain), we predicted that G allele carriers would experience impaired emotional modulation of pain compared to non-G allele carriers. Patients and Methods Emotional pictures (ie, erotica, neutral, attack) from the International Affective Picture System were used by permission from the authors to experimentally manipulate emotions in 64 adult participants while painful electrocutaneous stimulations were delivered in a cross-sectional study. Ratings of arousal and valence/pleasure were made in response to pictures, and pain ratings and a physiological measure of spinal nociception (ie, nociceptive flexion reflex, NFR) were collected in response to painful stimulations. Secondary analyses were conducted to examine the relationship between the A118G polymorphism and emotional modulation of pain/NFR. Results Exposure to emotional pictures elicited similar changes in valence, but G-carriers rated erotic pictures as more arousing. In non-carriers, pain was facilitated by attack pictures and pain and NFR were inhibited by erotic pictures relative to neutral pictures. Among G-carriers, pain was facilitated by negative emotional pictures but there was no pain or NFR inhibition by positive emotional pictures. Conclusion The altered response to pleasant stimuli further supports the role of opioids in appetitive behavior and describes how the A118G polymorphism may prevent carriers from inhibiting pain during pleasure.
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Affiliation(s)
- Edward A Trimble
- Department of Biochemistry, The University of Tulsa, Tulsa, OK, USA
- Department of Psychology, The University of Tulsa, Tulsa, OK, USA
| | - Parker A Kell
- Department of Psychology, The University of Tulsa, Tulsa, OK, USA
| | - Matteo A Avella
- Department of Biology, The University of Tulsa, Tulsa, OK, USA
- Division of Maternal and Child Health, Sidra Medicine, Education City, Ar-Rayyan, Doha, Qatar
| | | | - Jamie L Rhudy
- Department of Psychology, The University of Tulsa, Tulsa, OK, USA
- Department of Health Promotion Sciences, University of Oklahoma Health Sciences Center, Tulsa, OK, USA
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Schwerdtfeger J, Krause A, Kalbe C, Mazzuoli-Weber G, Eggert A, Puppe B, Kuhla B, Röttgen V. Endocannabinoid administration affects taste preference and the expression of cannabinoid and opioid receptors in the amygdala of early lactating cows. Sci Rep 2023; 13:4967. [PMID: 36973308 PMCID: PMC10042870 DOI: 10.1038/s41598-023-31724-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2022] [Accepted: 03/16/2023] [Indexed: 03/29/2023] Open
Abstract
The aim of the study was to investigate the influence of intraperitoneal N-arachidonoylethanolamide (AEA) on taste preference for feed and water, tongue taste receptor signalling (TAS1R2, GNAT3), and endocannabinoid (CNR1, CNR2, GPR55) and opioid (OPRD1, OPRK1, OPRM1, OPRL1) receptors in the amygdala and nucleus accumbens in periparturient cows. We conducted taste preference tests using unaltered, umami-tasting, and sweet-tasting water and feed, before and after calving. After calving, eight cows received AEA injections (3 µg/(kg bodyweight × day), 25 days), whereas eight control (CON) cows received saline injections. Tissue was sampled 30 days after calving. Before calving, both cow groups preferred sweet-tasting feed and umami-tasting water. After calving, only the AEA-treated group preferred sweet-tasting feed, whereas the CON group showed no clear taste preference. In the amygdala, the mRNA expression of CNR1, OPRD1 (left hemisphere) and OPRK1 (right hemisphere) was lower in AEA animals than in CON animals, whereas no differences were found in the nucleus accumbens and tongue taste receptor expression. In conclusion, AEA administration enhanced existing taste preferences and reduced the expression of specific endocannabinoid and opioid receptors in the amygdala. The results support endocannabinoid-opioid interactions in the control of taste-dependent feed preference in early lactating cows.
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Affiliation(s)
- Jessica Schwerdtfeger
- Institute of Nutritional Physiology 'Oskar Kellner', Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
| | - Annika Krause
- Institute of Behavioural Physiology, Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
| | - Claudia Kalbe
- Institute of Muscle Biology and Growth, Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
| | - Gemma Mazzuoli-Weber
- Institute for Physiology and Cell Biology, University of Veterinary Medicine, 30173, Hannover, Germany
| | - Anja Eggert
- Institute of Genetics and Biometry, Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
| | - Birger Puppe
- Institute of Behavioural Physiology, Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
- Behavioural Sciences, Faculty of Agricultural and Environmental Sciences, University of Rostock, Justus-Von-Liebig-Weg 6B, 18059, Rostock, Germany
| | - Björn Kuhla
- Institute of Nutritional Physiology 'Oskar Kellner', Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany
| | - Volker Röttgen
- Institute of Behavioural Physiology, Research Institute for Farm Animal Biology (FBN), Wilhelm-Stahl-Allee 2, 18196, Dummerstorf, Germany.
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A possible basis for personality in dogs: Individual differences in affective predispositions. Appl Anim Behav Sci 2022. [DOI: 10.1016/j.applanim.2022.105740] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Behavioral, Neural, and Molecular Mechanisms of Conditioned Mate Preference: The Role of Opioids and First Experiences of Sexual Reward. Int J Mol Sci 2022; 23:ijms23168928. [PMID: 36012194 PMCID: PMC9409009 DOI: 10.3390/ijms23168928] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 07/27/2022] [Accepted: 07/28/2022] [Indexed: 12/20/2022] Open
Abstract
Although mechanisms of mate preference are thought to be relatively hard-wired, experience with appetitive and consummatory sexual reward has been shown to condition preferences for partner related cues and even objects that predict sexual reward. Here, we reviewed evidence from laboratory species and humans on sexually conditioned place, partner, and ejaculatory preferences in males and females, as well as the neurochemical, molecular, and epigenetic mechanisms putatively responsible. From a comprehensive review of the available data, we concluded that opioid transmission at μ opioid receptors forms the basis of sexual pleasure and reward, which then sensitizes dopamine, oxytocin, and vasopressin systems responsible for attention, arousal, and bonding, leading to cortical activation that creates awareness of attraction and desire. First experiences with sexual reward states follow a pattern of sexual imprinting, during which partner- and/or object-related cues become crystallized by conditioning into idiosyncratic “types” that are found sexually attractive and arousing. These mechanisms tie reward and reproduction together, blending proximate and ultimate causality in the maintenance of variability within a species.
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Leconstant C, Spitz E. Integrative Model of Human-Animal Interactions: A One Health-One Welfare Systemic Approach to Studying HAI. Front Vet Sci 2022; 9:656833. [PMID: 35968006 PMCID: PMC9372562 DOI: 10.3389/fvets.2022.656833] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Accepted: 06/14/2022] [Indexed: 11/30/2022] Open
Abstract
The Integrative Model of Human-Animal Interactions (IMHAI) described herewith provides a conceptual framework for the study of interspecies interactions and aims to model the primary emotional processes involved in human-animal interactions. This model was developed from theoretical inputs from three fundamental disciplines for understanding interspecies interactions: neuroscience, psychology and ethology, with the objective of providing a transdisciplinary approach on which field professionals and researchers can build and collaborate. Seminal works in affective neuroscience offer a common basis between humans and animals and, as such, can be applied to the study of interspecies interactions from a One Health-One Welfare perspective. On the one hand, Jaak Panksepp's research revealed that primary/basic emotions originate in the deep subcortical regions of the brain and are shared by all mammals, including humans. On the other hand, several works in the field of neuroscience show that the basic physiological state is largely determined by the perception of safety. Thus, emotional expression reflects the state of an individual's permanent adaptation to ever-changing environmental demands. Based on this evidence and over 5 years of action research using grounded theory, alternating between research and practice, the IMHAI proposes a systemic approach to the study of primary-process emotional affects during interspecies social interactions, through the processes of emotional transfer, embodied communication and interactive emotional regulation. IMHAI aims to generate new hypotheses and predictions on affective behavior and interspecies communication. Application of such a model should promote risk prevention and the establishment of positive links between humans and animals thereby contributing to their respective wellbeing.
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Abstract
The endogenous opioid peptide system, comprised of enkephalins, endorphins, dynorphins, and nociceptin, is a highly complex neurobiological system. Opioid peptides are derived from four precursor molecules and undergo several processing events yielding over 20 unique opioid peptides. This diversity together with low in vivo concentration and complex processing and release dynamics has challenged research into each peptide's unique function. Despite the subsequent challenges in detecting and quantifying opioid peptides in vivo, researchers have pioneered several techniques to directly or indirectly assay the roles of opioid peptides during behavioral manipulations. In this review, we describe the limitations of the traditional techniques used to study the role of endogenous opioid peptides in food and drug reward and bring focus to the wealth of new techniques to measure endogenous opioid peptides in reward processing.
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Sustkova-Fiserova M, Charalambous C, Khryakova A, Certilina A, Lapka M, Šlamberová R. The Role of Ghrelin/GHS-R1A Signaling in Nonalcohol Drug Addictions. Int J Mol Sci 2022; 23:761. [PMID: 35054944 PMCID: PMC8776007 DOI: 10.3390/ijms23020761] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/05/2022] [Accepted: 01/06/2022] [Indexed: 01/27/2023] Open
Abstract
Drug addiction causes constant serious health, social, and economic burden within the human society. The current drug dependence pharmacotherapies, particularly relapse prevention, remain limited, unsatisfactory, unreliable for opioids and tobacco, and even symptomatic for stimulants and cannabinoids, thus, new more effective treatment strategies are researched. The antagonism of the growth hormone secretagogue receptor type A (GHS-R1A) has been recently proposed as a novel alcohol addiction treatment strategy, and it has been intensively studied in experimental models of other addictive drugs, such as nicotine, stimulants, opioids and cannabinoids. The role of ghrelin signaling in these drugs effects has also been investigated. The present review aims to provide a comprehensive overview of preclinical and clinical studies focused on ghrelin's/GHS-R1A possible involvement in these nonalcohol addictive drugs reinforcing effects and addiction. Although the investigation is still in its early stage, majority of the existing reviewed experimental results from rodents with the addition of few human studies, that searched correlations between the genetic variations of the ghrelin signaling or the ghrelin blood content with the addictive drugs effects, have indicated the importance of the ghrelin's/GHS-R1As involvement in the nonalcohol abused drugs pro-addictive effects. Further research is necessary to elucidate the exact involved mechanisms and to verify the future potential utilization and safety of the GHS-R1A antagonism use for these drug addiction therapies, particularly for reducing the risk of relapse.
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Affiliation(s)
- Magdalena Sustkova-Fiserova
- Department of Pharmacology, Third Faculty of Medicine, Charles University, Ruska 87, 100 00 Prague, Czech Republic; (C.C.); (A.K.); (A.C.); (M.L.)
| | - Chrysostomos Charalambous
- Department of Pharmacology, Third Faculty of Medicine, Charles University, Ruska 87, 100 00 Prague, Czech Republic; (C.C.); (A.K.); (A.C.); (M.L.)
| | - Anna Khryakova
- Department of Pharmacology, Third Faculty of Medicine, Charles University, Ruska 87, 100 00 Prague, Czech Republic; (C.C.); (A.K.); (A.C.); (M.L.)
| | - Alina Certilina
- Department of Pharmacology, Third Faculty of Medicine, Charles University, Ruska 87, 100 00 Prague, Czech Republic; (C.C.); (A.K.); (A.C.); (M.L.)
| | - Marek Lapka
- Department of Pharmacology, Third Faculty of Medicine, Charles University, Ruska 87, 100 00 Prague, Czech Republic; (C.C.); (A.K.); (A.C.); (M.L.)
| | - Romana Šlamberová
- Department of Physiology, Third Faculty of Medicine, Charles University, Ke Karlovu 4, 120 00 Prague, Czech Republic;
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Roschina OV, Levchuk LA, Boiko AS, Michalitskaya EV, Epimakhova EV, Losenkov IS, Simutkin GG, Loonen AJM, Bokhan NA, Ivanova SA. Beta-Endorphin and Oxytocin in Patients with Alcohol Use Disorder and Comorbid Depression. J Clin Med 2021; 10:jcm10235696. [PMID: 34884397 PMCID: PMC8658665 DOI: 10.3390/jcm10235696] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 11/05/2021] [Accepted: 12/01/2021] [Indexed: 02/07/2023] Open
Abstract
Background: The neuropeptides β-endorphin and oxytocin are released into the bloodstream as hormones from the pituitary gland but also have an important function as neuroregulators in the forebrain. The blood levels of both polypeptides have been shown to reflect depressive symptoms. β-Endorphin, in particular, is also involved in abstinence from alcohol. Methods: The serum levels of β-endorphin and oxytocin were measured during the early withdrawal phase in patients with alcohol use disorder (AUD) with (N = 35) or without (N = 45) depressive comorbidity and compared with those in healthy volunteers (N = 23). In addition to comparing the groups, the study examined whether serum levels correlated with various psychometric measures of dependence, depression and aggression, as well as with clinical characteristics of dependence. Results: Both serum levels of beta-endorphin and oxytocin were significantly lower in patients than those in healthy controls (p = 0.011 for β-endorphin and p = 0.005 for oxytocin, Kruskal–Wallis test). In patients with depressive comorbidity, the significance was greatest (p = 0.005 for β-endorphin and p = 0.004 for oxytocin, U-test). There was no correlation with clinical or psychometric parameters (p > 0.05, Spearman test), but beta-endorphin levels did correlate significantly with physical aggression (p = 0.026, Spearman test). Conclusions: Serum levels of β-endorphin and oxytocin are lower in patients with AUD, particularly in those with depressive comorbidity. β-Endorphin levels correlated with physical aggression according to the Buss–Durkee (BDHI) estimates.
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Affiliation(s)
- Olga V. Roschina
- Mental Health Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences, 634014 Tomsk, Russia; (O.V.R.); (L.A.L.); (A.S.B.); (E.V.M.); (E.V.E.); (I.S.L.); (G.G.S.); (N.A.B.); (S.A.I.)
| | - Lyudmila A. Levchuk
- Mental Health Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences, 634014 Tomsk, Russia; (O.V.R.); (L.A.L.); (A.S.B.); (E.V.M.); (E.V.E.); (I.S.L.); (G.G.S.); (N.A.B.); (S.A.I.)
| | - Anastasiia S. Boiko
- Mental Health Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences, 634014 Tomsk, Russia; (O.V.R.); (L.A.L.); (A.S.B.); (E.V.M.); (E.V.E.); (I.S.L.); (G.G.S.); (N.A.B.); (S.A.I.)
| | - Ekaterina V. Michalitskaya
- Mental Health Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences, 634014 Tomsk, Russia; (O.V.R.); (L.A.L.); (A.S.B.); (E.V.M.); (E.V.E.); (I.S.L.); (G.G.S.); (N.A.B.); (S.A.I.)
| | - Elena V. Epimakhova
- Mental Health Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences, 634014 Tomsk, Russia; (O.V.R.); (L.A.L.); (A.S.B.); (E.V.M.); (E.V.E.); (I.S.L.); (G.G.S.); (N.A.B.); (S.A.I.)
| | - Innokentiy S. Losenkov
- Mental Health Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences, 634014 Tomsk, Russia; (O.V.R.); (L.A.L.); (A.S.B.); (E.V.M.); (E.V.E.); (I.S.L.); (G.G.S.); (N.A.B.); (S.A.I.)
| | - German G. Simutkin
- Mental Health Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences, 634014 Tomsk, Russia; (O.V.R.); (L.A.L.); (A.S.B.); (E.V.M.); (E.V.E.); (I.S.L.); (G.G.S.); (N.A.B.); (S.A.I.)
| | - Anton J. M. Loonen
- Groningen Research Institute of Pharmacy (GRIP), PharmacoTherapy, -Epidemiology & -Economics, University of Groningen, 9713AV Groningen, The Netherlands
- Correspondence:
| | - Nikolay A. Bokhan
- Mental Health Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences, 634014 Tomsk, Russia; (O.V.R.); (L.A.L.); (A.S.B.); (E.V.M.); (E.V.E.); (I.S.L.); (G.G.S.); (N.A.B.); (S.A.I.)
- Psychiatry, Addictology and Psychotherapy Department, Siberian State Medical University, 634050 Tomsk, Russia
| | - Svetlana A. Ivanova
- Mental Health Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences, 634014 Tomsk, Russia; (O.V.R.); (L.A.L.); (A.S.B.); (E.V.M.); (E.V.E.); (I.S.L.); (G.G.S.); (N.A.B.); (S.A.I.)
- Psychiatry, Addictology and Psychotherapy Department, Siberian State Medical University, 634050 Tomsk, Russia
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Salmanzadeh H, Ahmadi-Soleimani SM, Azadi M, Halliwell RF, Azizi H. Adolescent Substance Abuse, Transgenerational Consequences and Epigenetics. Curr Neuropharmacol 2021; 19:1560-1569. [PMID: 33655865 PMCID: PMC8762180 DOI: 10.2174/1570159x19666210303121519] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 01/13/2021] [Accepted: 02/12/2021] [Indexed: 11/22/2022] Open
Abstract
Adolescence is the transitional period between childhood and adulthood and a critical period in brain development. Adolescence in humans is also associated with increased expression of risk-taking behaviors. Epidemiological and clinical studies, for example, show a surge of drug abuse and raise the hypothesis that the adolescent brain undergoes critical changes resulting in diminished control. Determining how substance abuse during this critical period might cause longterm neurobiological changes in cognition and behavior is therefore critically important. The present work aims to provide an evaluation of the transgenerational and multi-generational phenotypes derived from parent animals exposed to drugs of abuse only during their adolescence. Specifically, we will consider changes found following the administration of cannabinoids, nicotine, alcohol and opiates. In addition, epigenetic modifications of the genome following drug exposure will be discussed as emerging evidence of the underlying adverse transgenerational effects. Notwithstanding, much of the new data discussed here is from animal models, indicating that future clinical studies are much needed to better understand the neurobiological consequences and mechanisms of drug actions on the human brains' development and maturation.
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Affiliation(s)
| | | | | | - Robert F. Halliwell
- Address correspondence to this author at the TJ Long School of Pharmacy, University of the Pacific, Stockton, California, USA; Tel: +1 (209) 946 2074; E-mail: and Department of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran; Tel: +98-21-82884587; Fax: +98-21-82884528; E-mail:
| | - Hossein Azizi
- Address correspondence to this author at the TJ Long School of Pharmacy, University of the Pacific, Stockton, California, USA; Tel: +1 (209) 946 2074; E-mail: and Department of Physiology, Faculty of Medical Sciences, Tarbiat Modares University, Tehran, Iran; Tel: +98-21-82884587; Fax: +98-21-82884528; E-mail:
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Gibula-Tarlowska E, Kotlinska JH. Crosstalk between Opioid and Anti-Opioid Systems: An Overview and Its Possible Therapeutic Significance. Biomolecules 2020; 10:E1376. [PMID: 32998249 PMCID: PMC7599993 DOI: 10.3390/biom10101376] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 09/20/2020] [Accepted: 09/23/2020] [Indexed: 12/23/2022] Open
Abstract
Opioid peptides and receptors are broadly expressed throughout peripheral and central nervous systems and have been the subject of intense long-term investigations. Such studies indicate that some endogenous neuropeptides, called anti-opioids, participate in a homeostatic system that tends to reduce the effects of endogenous and exogenous opioids. Anti-opioid properties have been attributed to various peptides, including melanocyte inhibiting factor (MIF)-related peptides, cholecystokinin (CCK), nociceptin/orphanin FQ (N/OFQ), and neuropeptide FF (NPFF). These peptides counteract some of the acute effects of opioids, and therefore, they are involved in the development of opioid tolerance and addiction. In this work, the anti-opioid profile of endogenous peptides was described, mainly taking into account their inhibitory influence on opioid-induced effects. However, the anti-opioid peptides demonstrated complex properties and could show opioid-like as well as anti-opioid effects. The aim of this review is to detail the phenomenon of crosstalk taking place between opioid and anti-opioid systems at the in vivo pharmacological level and to propose a cellular and molecular basis for these interactions. A better knowledge of these mechanisms has potential therapeutic interest for the control of opioid functions, notably for alleviating pain and/or for the treatment of opioid abuse.
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Affiliation(s)
- Ewa Gibula-Tarlowska
- Department of Pharmacology and Pharmacodynamics, Medical University, 20-059 Lublin, Poland;
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Rodríguez-Manzo G, González-Morales E. Endocannabinoids mediate long-lasting behavioural and physiological changes in male rats induced by the repeated activation of the mesolimbic system by copulation to satiety. Behav Brain Res 2020; 383:112510. [PMID: 31987931 DOI: 10.1016/j.bbr.2020.112510] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 01/20/2020] [Accepted: 01/24/2020] [Indexed: 12/21/2022]
Abstract
Sexually satiated male rats exhibit long-lasting physiological changes, suggestive of brain plasticity, the most conspicuous of which are a sexual behaviour inhibition and a generalised drug hypersensitivity. Copulation activates the mesolimbic circuit increasing dopamine (DA) release in the nucleus accumbens (NAcc) and, enhanced midbrain DA neuron activity promotes endocannabinoid (eCB) release in the ventral tegmental area (VTA). The objective of this work was to explore the possible participation of DA and/or eCB transmission in the induction of these two long-lasting phenomena. To this aim we analysed the effect of blocking DA or CB1 receptors during the process of copulation to exhaustion, on the expression 24 h later, of the sexual inhibitory state and the hypersensitivity to two different drugs: 8-OH-DPAT, a 5-HT1A receptor agonist, and yohimbine, an α2-adrenoceptor antagonist. Blockade of DA receptors failed to prevent these phenomena, while blockade of CB1 receptors interfered with the appearance of the sexual inhibition and the hypersensitivity to both drugs in the sexually satiated animals. Specific blockade of CB1 receptors in the VTA during copulation to satiety mimicked these results, suggesting that both eCB-mediated effects were exerted in this brain region. It is concluded that eCBs play a role in the induction of behavioural and physiological changes, triggered by copulation to satiety, by acting at the VTA, while increased NAcc DA levels appear not to contribute to the changes induced by intense copulation. Results pose sexual satiety as a useful model for the study of brain plasticity phenomena induced by natural rewards.
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Quintana GR, Birrel M, Marceau S, Kalantari N, Bowden J, Bachoura Y, Borduas E, Lemay V, Payne JW, Cionnaith CM, Pfaus JG. Differential disruption of conditioned ejaculatory preference in the male rat based on different sensory modalities by micro-infusions of naloxone to the medial preoptic area or ventral tegmental area. Psychopharmacology (Berl) 2019; 236:3613-3623. [PMID: 31359118 DOI: 10.1007/s00213-019-05334-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 07/14/2019] [Indexed: 01/19/2023]
Abstract
RATIONALE Male rats trained to associate a neutral odor or rodent jacket on a female with their post-ejaculatory reward state display a preference to ejaculate with females bearing the odor or jacket. This conditioned ejaculatory preference (CEP) can be shifted by systemic administration of the opioid antagonist naloxone (NAL) during training, such that NAL-trained males distribute their ejaculations to females without the cue, relative to saline (SAL)-trained males. OBJECTIVE The present study examined two brain sites, the medial preoptic area (mPOA) or ventral tegmental area (VTA), where the opioid reward state might be induced. METHODS Sexually naïve Long-Evans males were implanted with bilateral guide cannula aimed at either site before they underwent multi-ejaculatory conditioning trials at 4-day intervals with sexually receptive females that bore either an almond odor or rodent tethering jacket. Infusions of NAL (1 μl/side) or SAL (1 μl/side) were made prior to each conditioning trial. All males were infused with SAL prior to a final open-field choice test with two sexually receptive females, one scented and the other unscented, or one jacketed and the other unjacketed. RESULTS Males previously conditioned with SAL in either region showed significant CEP. In contrast, prior infusions of NAL to the mPOA shifted the preference towards the unfamiliar female, whereas prior infusions to the VTA abolished CEP for the odor. Subsequent detection of Fos protein induced by the cue showed that, relative to SAL-treated males, prior experience with NAL in the mPOA suppressed Fos in both the mPOA and VTA, whereas prior experience with NAL in to the VTA suppressed Fos in the VTA alone. CONCLUSIONS Opioid antagonism in the mPOA produces a state of non-reward whereas in the VTA, it produces a state in which the odor does not acquire incentive properties.
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Affiliation(s)
- Gonzalo R Quintana
- Centre for Studies in Behavioral Neurobiology, Department of Psychology, Concordia University, Montréal, QC, H4B 1R6, Canada
| | - Morgan Birrel
- Centre for Studies in Behavioral Neurobiology, Department of Psychology, Concordia University, Montréal, QC, H4B 1R6, Canada
| | - Sarah Marceau
- Centre for Studies in Behavioral Neurobiology, Department of Psychology, Concordia University, Montréal, QC, H4B 1R6, Canada
| | - Narges Kalantari
- Centre for Studies in Behavioral Neurobiology, Department of Psychology, Concordia University, Montréal, QC, H4B 1R6, Canada
| | - James Bowden
- Centre for Studies in Behavioral Neurobiology, Department of Psychology, Concordia University, Montréal, QC, H4B 1R6, Canada
| | - Yvonne Bachoura
- Centre for Studies in Behavioral Neurobiology, Department of Psychology, Concordia University, Montréal, QC, H4B 1R6, Canada
| | - Eric Borduas
- Centre for Studies in Behavioral Neurobiology, Department of Psychology, Concordia University, Montréal, QC, H4B 1R6, Canada
| | - Valerie Lemay
- Centre for Studies in Behavioral Neurobiology, Department of Psychology, Concordia University, Montréal, QC, H4B 1R6, Canada
| | - Jason W Payne
- Centre for Studies in Behavioral Neurobiology, Department of Psychology, Concordia University, Montréal, QC, H4B 1R6, Canada
| | - Conall Mac Cionnaith
- Centre for Studies in Behavioral Neurobiology, Department of Psychology, Concordia University, Montréal, QC, H4B 1R6, Canada
| | - James G Pfaus
- Centre for Studies in Behavioral Neurobiology, Department of Psychology, Concordia University, Montréal, QC, H4B 1R6, Canada. .,Centro de Investigaciones Cerebrales, Universidad Veracruzana, CP 91193, Xalapa, VER, Mexico.
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A touch-scaffolded model of human prosociality. Neurosci Biobehav Rev 2018; 92:453-463. [DOI: 10.1016/j.neubiorev.2018.07.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Revised: 05/21/2018] [Accepted: 07/11/2018] [Indexed: 01/10/2023]
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Krolick KN, Zhu Q, Shi H. Effects of Estrogens on Central Nervous System Neurotransmission: Implications for Sex Differences in Mental Disorders. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2018; 160:105-171. [PMID: 30470289 PMCID: PMC6737530 DOI: 10.1016/bs.pmbts.2018.07.008] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Nearly one of every five US individuals aged 12 years old or older lives with certain types of mental disorders. Men are more likely to use various types of substances, while women tend to be more susceptible to mood disorders, addiction, and eating disorders, all of which are risks associated with suicidal attempts. Fundamental sex differences exist in multiple aspects of the functions and activities of neurotransmitter-mediated neural circuits in the central nervous system (CNS). Dysregulation of these neural circuits leads to various types of mental disorders. The potential mechanisms of sex differences in the CNS neural circuitry regulating mood, reward, and motivation are only beginning to be understood, although they have been largely attributed to the effects of sex hormones on CNS neurotransmission pathways. Understanding this topic is important for developing prevention and treatment of mental disorders that should be tailored differently for men and women. Studies using animal models have provided important insights into pathogenesis, mechanisms, and new therapeutic approaches of human diseases, but some concerns remain to be addressed. The purpose of this chapter is to integrate human and animal studies involving the effects of the sex hormones, estrogens, on CNS neurotransmission, reward processing, and associated mental disorders. We provide an overview of existing evidence for the physiological, behavioral, cellular, and molecular actions of estrogens in the context of controlling neurotransmission in the CNS circuits regulating mood, reward, and motivation and discuss related pathology that leads to mental disorders.
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Affiliation(s)
- Kristen N Krolick
- Center for Physiology and Neuroscience, Department of Biology, Miami University, Oxford, OH, United States
| | - Qi Zhu
- Center for Physiology and Neuroscience, Department of Biology, Miami University, Oxford, OH, United States
| | - Haifei Shi
- Center for Physiology and Neuroscience, Department of Biology, Miami University, Oxford, OH, United States; Cellular, Molecular and Structural Biology, Miami University, Oxford, OH, United States.
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Thörnqvist PO, McCarrick S, Ericsson M, Roman E, Winberg S. Bold zebrafish (Danio rerio) express higher levels of delta opioid and dopamine D2 receptors in the brain compared to shy fish. Behav Brain Res 2018; 359:927-934. [PMID: 29935279 DOI: 10.1016/j.bbr.2018.06.017] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 05/28/2018] [Accepted: 06/19/2018] [Indexed: 11/26/2022]
Abstract
Individual variation in coping with environmental challenges is a well-known phenomenon across vertebrates, including teleost fish. Dopamine is the major transmitter in the brain reward networks, and important for motivational processes and stress coping. Functions of the endogenous opioid system are not well studied in teleosts. However, in mammals the activity in the brain reward networks is regulated by the endogenous opioid system. This study aimed at investigating if there was a correlation between risk-taking behavior and the expression of dopamine and opioid receptors in the zebrafish (Danio rerio) brain. Risk-taking behavior was assessed in a novel tank diving test, and the most extreme high risk taking, i.e. bold, and low risk taking, i.e. shy, fish were sampled for qPCR analysis of whole brain gene expression. The expression analysis showed a significantly higher expression of the dopamine D2 receptors (drd2a and drd2b) and the delta opioid receptor (DOR; oprd1b) in bold compared to shy fish. Besides reward and reinforcing properties, DORs are also involved in emotional responses. Dopamine D2 receptors are believed to be important for active stress coping in rodents, and taken together the results of the current study suggest similar functions in zebrafish. However, additional experiments are required to clarify how dopamine and opioid receptor activation affect behavior and stress coping in this species.
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Affiliation(s)
- Per-Ove Thörnqvist
- Department of Neuroscience, Physiology Unit, Biomedical Centre (BMC), Uppsala University, Box 593, SE-75124 Uppsala, Sweden.
| | - Sarah McCarrick
- Unit of Biochemical Toxicology, Institute of Environmental Medicine, Karolinska Institutet, Box 210, SE-171 77 Stockholm, Sweden
| | - Maja Ericsson
- Department of Neuroscience, Physiology Unit, Biomedical Centre (BMC), Uppsala University, Box 593, SE-75124 Uppsala, Sweden
| | - Erika Roman
- Department of Pharmaceutical Biosciences, Neuropharmacology, Addiction and Behavior Unit, Biomedical Centre (BMC), Uppsala University, Box 591, SE-75124 Uppsala, Sweden
| | - Svante Winberg
- Department of Neuroscience, Physiology Unit, Biomedical Centre (BMC), Uppsala University, Box 593, SE-75124 Uppsala, Sweden
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Pecina M, Zubieta JK. Expectancy Modulation of Opioid Neurotransmission. INTERNATIONAL REVIEW OF NEUROBIOLOGY 2018; 138:17-37. [PMID: 29681324 PMCID: PMC6314670 DOI: 10.1016/bs.irn.2018.02.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Expectancies are powerful modulators of cognitive and emotional experiences, as well as the neurobiological responses linked to these processes. In medicine, placebo effects are a clear example of how expectancies activate opioid neurotransmission in a treatment context, leading to the experience of analgesia and the improvement of emotional states, among other symptoms. Molecular neuroimaging techniques using positron emission tomography (PET) and the selective μ-opioid receptor tracer [11C]carfentanil have significantly contributed to our understanding of the neurobiological systems involved in the formation of placebo effects. This line of research has described neural and neurotransmitter networks implicated in placebo effects and provided the technical tools to examine inter-individual differences in the function of placebo responsive mechanisms. As a consequence, the capacity to activate endogenous opioid networks during the administration of placebos has been linked to the concept of resiliency mechanisms, partially determined by genetic factors, and uncovered by the cognitive emotional integration of the expectations created by the therapeutic environment and its maintenance through learning mechanisms. This evidence has contributed to the understanding of the biological bases of the cognitive and psychological mechanisms implicated in the response to treatments, and opened up new opportunities for drug development and the enhancement of treatment responses. Further, delineation of these processes within and across diseases is critical to understand neural systems that could be enhanced to promote symptomatic improvement and modify disease progression.
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MESH Headings
- Analgesia/psychology
- Brain/diagnostic imaging
- Brain/metabolism
- Brain/physiology
- Depressive Disorder, Major/diagnostic imaging
- Depressive Disorder, Major/metabolism
- Depressive Disorder, Major/physiopathology
- Health Knowledge, Attitudes, Practice
- Humans
- Nociception/physiology
- Personality/physiology
- Placebo Effect
- Receptors, Opioid, mu/genetics
- Receptors, Opioid, mu/metabolism
- Receptors, Opioid, mu/physiology
- Synaptic Transmission/physiology
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Affiliation(s)
- Marta Pecina
- University of Pittsburgh, Pittsburgh, PA, United States.
| | - Jon-Kar Zubieta
- University Neuropsychiatric Institute, University of Utah Health Sciences Center, Salt Lake City, UT, United States
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Mongi-Bragato B, Avalos MP, Guzmán AS, Bollati FA, Cancela LM. Enkephalin as a Pivotal Player in Neuroadaptations Related to Psychostimulant Addiction. Front Psychiatry 2018; 9:222. [PMID: 29892236 PMCID: PMC5985699 DOI: 10.3389/fpsyt.2018.00222] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/29/2017] [Accepted: 05/08/2018] [Indexed: 12/21/2022] Open
Abstract
Enkephalin expression is high in mesocorticolimbic areas associated with psychostimulant-induced behavioral and neurobiological effects, and may also modulate local neurotransmission in this circuit network. Psychostimulant drugs, like amphetamine and cocaine, significantly increase the content of enkephalin in these brain structures, but we do not yet understand the specific significance of this drug-induced adaptation. In this review, we summarize the neurochemical and molecular mechanism of psychostimulant-induced enkephalin activation in mesocorticolimbic brain areas, and the contribution of this opioid peptide in the pivotal neuroadaptations and long-term behavioral changes underlying psychostimulant addiction. There is evidence suggesting that adaptive changes in enkephalin content in the mesocorticolimbic circuit, induced by acute and chronic psychostimulant administration, may represent a key initial step in the long-term behavioral and neuronal plasticity induced by these drugs.
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Affiliation(s)
- Bethania Mongi-Bragato
- Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - María P Avalos
- Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Andrea S Guzmán
- Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Flavia A Bollati
- Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
| | - Liliana M Cancela
- Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, Córdoba, Argentina
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Kalafateli AL, Vallöf D, Jörnulf JW, Heilig M, Jerlhag E. A cannabinoid receptor antagonist attenuates ghrelin-induced activation of the mesolimbic dopamine system in mice. Physiol Behav 2017; 184:211-219. [PMID: 29221808 DOI: 10.1016/j.physbeh.2017.12.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 12/04/2017] [Accepted: 12/05/2017] [Indexed: 01/26/2023]
Abstract
Ghrelin has been attributed various physiological processes including food intake and reward regulation, through activation of the mesolimbic dopamine system. Reward modulation involves the mesolimbic dopamine system, consisting of the ventral tegmental area (VTA) dopamine neurons targeting nucleus accumbens (NAc), a system that ghrelin activates through VTA-dependent mechanisms. In the first study, we found that systemic intraperitoneal (ip) administration of rimonabant attenuated intracerebroventricular (icv) ghrelin's ability to cause locomotor stimulation and NAc dopamine release in mice. Ghrelin-induced (icv) chow intake was not altered by rimonabant administration (ip). Finally, we showed that bilateral VTA administration of rimonabant blocks the ability of intra-VTA administered ghrelin to increase locomotor activity, but does not affect food intake in mice. Collectively, these data indicate clear dissociation between regulation of food intake and activation of the mesolimbic dopamine system.
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Affiliation(s)
- Aimilia Lydia Kalafateli
- Institute of Neuroscience and Physiology, Department of Pharmacology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Daniel Vallöf
- Institute of Neuroscience and Physiology, Department of Pharmacology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Julia Winsa Jörnulf
- Institute of Neuroscience and Physiology, Department of Pharmacology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Markus Heilig
- Center for Social and Affective Neuroscience, Division of Neuro and Inflammation Sciences, Linköping University, Linköping, Sweden
| | - Elisabet Jerlhag
- Institute of Neuroscience and Physiology, Department of Pharmacology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden.
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Hloch K, Mladěnka P, Doseděl M, Adriani W, Zoratto F. The current clinical knowledge on the treatment of gambling disorder: A summary. Synapse 2017; 71. [DOI: 10.1002/syn.21976] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Revised: 03/14/2017] [Accepted: 03/14/2017] [Indexed: 02/04/2023]
Affiliation(s)
- Karel Hloch
- Department of Social and Clinical Pharmacy; Faculty of Pharmacy, Charles University; Heyrovskeho 1203 Hradec Kralove 500 05 Czech Republic
| | - Přemysl Mladěnka
- Department of Pharmacology and Toxicology; Faculty of Pharmacy, Charles University; Heyrovskeho 1203 Hradec Kralove 500 05 Czech Republic
| | - Martin Doseděl
- Department of Social and Clinical Pharmacy; Faculty of Pharmacy, Charles University; Heyrovskeho 1203 Hradec Kralove 500 05 Czech Republic
| | - Walter Adriani
- Centre for Behavioural Sciences and Mental Health; Istituto Superiore di Sanità; Viale Regina Elena 299 Rome I-00161 Italy
| | - Francesca Zoratto
- Unit of Cognitive Primatology and Primate Centre; Institute of Cognitive Sciences and Technologies of the National Research Council of Italy; Via Ulisse Aldrovandi 16/B Rome I-00197 Italy
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Riters LV, Cordes MA, Stevenson SA. Prodynorphin and kappa opioid receptor mRNA expression in the brain relates to social status and behavior in male European starlings. Behav Brain Res 2016; 320:37-47. [PMID: 27913257 DOI: 10.1016/j.bbr.2016.11.050] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 11/21/2016] [Accepted: 11/28/2016] [Indexed: 12/18/2022]
Abstract
Numerous animal species display behavioral changes in response to changes in social status or territory possession. For example, in male European starlings only males that acquire nesting sites display high rates of sexual and agonistic behavior. Past studies show that mu and delta opioid receptors regulate behaviors associated with social ascension or defeat. Opioids also act at kappa receptors, with dynorphin binding with the highest affinity; however, the role of these opioids in social behavior has not been well studied. We observed flocks of male starlings during the breeding season and ran quantitative real-time polymerase chain reaction (qPCR) to measure expression of kappa opioid receptors (OPRK1) and prodynorphin (PDYN) in brain regions involved in social behavior and motivation (ventral tegmental area [VTA], medial preoptic nucleus [mPOA]) and vocal behavior (Area X). Males with nesting territories displayed more sexual/agonistic behavior than males without nesting territories. They also had lower OPRK1 expression in VTA and mPOA. OPRK1 expression in VTA correlated negatively with sexual/agonistic behaviors, consistent with past studies showing kappa receptors in VTA to inhibit sociosexual behaviors. PDYN in mPOA correlated negatively with a measure of nesting behavior that may also reflect sexual motivation. PDYN in Area X related positively to song. Distinct patterns of OPRK1 and PDYN expression in VTA, mPOA, and Area X related to gonad volume, suggesting that breeding condition may modify (or be modified by) OPRK1 and PDYN expression. Studies are now needed to further characterize the role of OPRK1 and PDYN in status-appropriate social behaviors.
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Affiliation(s)
- Lauren V Riters
- Department of Zoology, 428 Birge Hall, 430 Lincoln Drive, University of Wisconsin, Madison, WI 53706, USA.
| | - Melissa A Cordes
- Department of Zoology, 428 Birge Hall, 430 Lincoln Drive, University of Wisconsin, Madison, WI 53706, USA
| | - Sharon A Stevenson
- Department of Zoology, 428 Birge Hall, 430 Lincoln Drive, University of Wisconsin, Madison, WI 53706, USA
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Manduca A, Lassalle O, Sepers M, Campolongo P, Cuomo V, Marsicano G, Kieffer B, Vanderschuren LJMJ, Trezza V, Manzoni OJJ. Interacting Cannabinoid and Opioid Receptors in the Nucleus Accumbens Core Control Adolescent Social Play. Front Behav Neurosci 2016; 10:211. [PMID: 27899885 PMCID: PMC5110529 DOI: 10.3389/fnbeh.2016.00211] [Citation(s) in RCA: 47] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2016] [Accepted: 10/18/2016] [Indexed: 12/31/2022] Open
Abstract
Social play behavior is a highly rewarding, developmentally important form of social interaction in young mammals. However, its neurobiological underpinnings remain incompletely understood. Previous work has suggested that opioid and endocannabinoid neurotransmission interact in the modulation of social play. Therefore, we combined behavioral, pharmacological, electrophysiological, and genetic approaches to elucidate the role of the endocannabinoid 2-arachidonoylglycerol (2-AG) in social play, and how cannabinoid and opioid neurotransmission interact to control social behavior in adolescent rodents. Systemic administration of the 2-AG hydrolysis inhibitor JZL184 or the opioid receptor agonist morphine increased social play behavior in adolescent rats. These effects were blocked by systemic pretreatment with either CB1 cannabinoid receptor (CB1R) or mu-opioid receptor (MOR) antagonists. The social play-enhancing effects of systemic morphine or JZL184 treatment were also prevented by direct infusion of the CB1R antagonist SR141716 and the MOR antagonist naloxone into the nucleus accumbens core (NAcC). Searching for synaptic correlates of these effects in adolescent NAcC excitatory synapses, we observed that CB1R antagonism blocked the effect of the MOR agonist DAMGO and, conversely, that naloxone reduced the effect of a cannabinoid agonist. These results were recapitulated in mice, and completely abolished in CB1R and MOR knockout mice, suggesting that the functional interaction between CB1R and MOR in the NAcC in the modulation of social behavior is widespread in rodents. The data shed new light on the mechanism by which endocannabinoid lipids and opioid peptides interact to orchestrate rodent socioemotional behaviors.
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Affiliation(s)
- Antonia Manduca
- Institut National De La Santé Et De La Recherche Médicale U901Marseille, France; Université de la Méditerranée UMR S901 Aix-Marseille 2Marseille, France; INMEDMarseille, France
| | - Olivier Lassalle
- Institut National De La Santé Et De La Recherche Médicale U901Marseille, France; Université de la Méditerranée UMR S901 Aix-Marseille 2Marseille, France; INMEDMarseille, France
| | - Marja Sepers
- Institut National De La Santé Et De La Recherche Médicale U901Marseille, France; Université de la Méditerranée UMR S901 Aix-Marseille 2Marseille, France; INMEDMarseille, France
| | - Patrizia Campolongo
- Department of Physiology and Pharmacology, Sapienza University of Rome Rome, Italy
| | - Vincenzo Cuomo
- Department of Physiology and Pharmacology, Sapienza University of Rome Rome, Italy
| | - Giovanni Marsicano
- NeuroCentre Magendie, Endocannabinoids and Neuroadaptation, Institut National De La Santé Et De La Recherche Médicale U862Bordeaux, France; NeuroCentre Magendie U862, University of BordeauxBordeaux, France
| | - Brigitte Kieffer
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique/Institut National de la Santé et de la Recherche Médicale/Université de Strasbourg Illkirch, France
| | - Louk J M J Vanderschuren
- Division of Behavioural Neuroscience, Department of Animals in Science and Society, Faculty of Veterinary Medicine, Utrecht University Utrecht, Netherlands
| | - Viviana Trezza
- Section of Biomedical Sciences and Technologies, Department of Science, University Roma Tre Rome, Italy
| | - Olivier J J Manzoni
- Institut National De La Santé Et De La Recherche Médicale U901Marseille, France; Université de la Méditerranée UMR S901 Aix-Marseille 2Marseille, France; INMEDMarseille, France
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Is there heightened sensitivity to social reward in adolescence? Curr Opin Neurobiol 2016; 40:81-85. [DOI: 10.1016/j.conb.2016.06.016] [Citation(s) in RCA: 93] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 06/14/2016] [Accepted: 06/22/2016] [Indexed: 01/06/2023]
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25
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Launay J, Tarr B, Dunbar RIM. Synchrony as an Adaptive Mechanism for Large-Scale Human Social Bonding. Ethology 2016. [DOI: 10.1111/eth.12528] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Jacques Launay
- Department of Experimental Psychology; University of Oxford; Oxford UK
- Division of Psychology; Brunel University London; Uxbridge UK
| | - Bronwyn Tarr
- Department of Experimental Psychology; University of Oxford; Oxford UK
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Karjalainen T, Tuominen L, Manninen S, Kalliokoski KK, Nuutila P, Jääskeläinen IP, Hari R, Sams M, Nummenmaa L. Behavioural activation system sensitivity is associated with cerebral μ-opioid receptor availability. Soc Cogn Affect Neurosci 2016; 11:1310-6. [PMID: 27053768 DOI: 10.1093/scan/nsw044] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2015] [Accepted: 03/24/2016] [Indexed: 12/18/2022] Open
Abstract
The reinforcement-sensitivity theory proposes that behavioural activation and inhibition systems (BAS and BIS, respectively) guide approach and avoidance behaviour in potentially rewarding and punishing situations. Their baseline activity presumably explains individual differences in behavioural dispositions when a person encounters signals of reward and harm. Yet, neurochemical bases of BAS and BIS have remained poorly understood. Here we used in vivo positron emission tomography with a µ-opioid receptor (MOR) specific ligand [(11)C]carfentanil to test whether individual differences in MOR availability would be associated with BAS or BIS. We scanned 49 healthy subjects and measured their BAS and BIS sensitivities using the BIS/BAS scales. BAS but not BIS sensitivity was positively associated with MOR availability in frontal cortex, amygdala, ventral striatum, brainstem, cingulate cortex and insula. Strongest associations were observed for the BAS subscale 'Fun Seeking'. Our results suggest that endogenous opioid system underlies BAS, and that differences in MOR availability could explain inter-individual differences in reward seeking behaviour.
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Affiliation(s)
- Tomi Karjalainen
- Turku PET Centre, University of Turku, Turku, Finland Department of Neuroscience and Biomedical Engineering, School of Science, Aalto University, 00076 AALTO, Espoo, Finland
| | - Lauri Tuominen
- Turku PET Centre, University of Turku, Turku, Finland Department of Neuroscience and Biomedical Engineering, School of Science, Aalto University, 00076 AALTO, Espoo, Finland
| | | | | | - Pirjo Nuutila
- Turku PET Centre, University of Turku, Turku, Finland Department of Endocrinology, Turku University Hospital, Turku 20521, Finland
| | - Iiro P Jääskeläinen
- Department of Neuroscience and Biomedical Engineering, School of Science, Aalto University, 00076 AALTO, Espoo, Finland
| | - Riitta Hari
- Department of Neuroscience and Biomedical Engineering, School of Science, Aalto University, 00076 AALTO, Espoo, Finland Department of Art, School of Arts, Design and Architecture, 00076 AALTO, Helsinki, Finland
| | - Mikko Sams
- Department of Neuroscience and Biomedical Engineering, School of Science, Aalto University, 00076 AALTO, Espoo, Finland
| | - Lauri Nummenmaa
- Turku PET Centre, University of Turku, Turku, Finland Department of Neuroscience and Biomedical Engineering, School of Science, Aalto University, 00076 AALTO, Espoo, Finland Department of Psychology, University of Turku, Turku 20014, Finland
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Mongi-Bragato B, Zamponi E, García-Keller C, Assis MA, Virgolini MB, Mascó DH, Zimmer A, Cancela LM. Enkephalin is essential for the molecular and behavioral expression of cocaine sensitization. Addict Biol 2016; 21:326-38. [PMID: 25431310 DOI: 10.1111/adb.12200] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Behavioral sensitization to cocaine is associated to neuroadaptations that contribute to addiction. Enkephalin is highly expressed in mesocorticolimbic areas associated with cocaine-induced sensitization; however, their influence on cocaine-dependent behavioral and neuronal plasticity has not been explained. In this study, we employed a knockout (KO) model to investigate the contribution of enkephalin in cocaine-induced behavioral sensitization. Wild-type (WT) and proenkephalin KO mice were treated with cocaine once daily for 9 days to induce sensitization. Additionally, to clarify the observations in KO mice, the same procedure was applied in C57BL/6 mice, except that naloxone was administered before each cocaine injection. All animals received a cocaine challenge on days 15 and 21 of the treatment to evaluate the expression of locomotor sensitization. On day 21, microdialysis measures of accumbal extracellular dopamine, Western blotting for GluR1 AMPA receptor (AMPAR), phosphorylated ERK2 (pERK2), CREB (pCREB), TrKB (pTrkB) were performed in brain areas relevant for sensitization from KO and WT and/or naloxone- and vehicle pre-treated animals. We found that KO mice do not develop sensitization to the stimulating properties of cocaine on locomotor activity and on dopamine release in the nucleus accumbens (NAc). Furthermore, pivotal neuroadaptations such as the increase in pTrkB receptor, pERK/CREB and AMPAR related to sensitized responses were absent in the NAc from KO mice. Consistently, full abrogation of cocaine-induced behavioral and neuronal plasticity after naloxone pre-treatment was observed. We show for first time that the proenkephalin system is essential in regulating long-lasting pivotal neuroadaptations in the NAc underlying behavioral sensitization to cocaine.
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Affiliation(s)
- Bethania Mongi-Bragato
- Departamento de Farmacología; Facultad de Ciencias Químicas; Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET); Universidad Nacional de Córdoba; Argentina
| | - Emiliano Zamponi
- Centro de Biología Celular y Molecular-Instituto de Investigaciones Biológicas y Tecnológicas (CEBICEM-IIByT); Facultad de Ciencias Exactas, Físicas y Naturales; Universidad Nacional de Córdoba; Argentina
| | - Constanza García-Keller
- Departamento de Farmacología; Facultad de Ciencias Químicas; Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET); Universidad Nacional de Córdoba; Argentina
| | - María Amparo Assis
- Departamento de Farmacología; Facultad de Ciencias Químicas; Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET); Universidad Nacional de Córdoba; Argentina
| | - Miriam B. Virgolini
- Departamento de Farmacología; Facultad de Ciencias Químicas; Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET); Universidad Nacional de Córdoba; Argentina
| | - Daniel H. Mascó
- Centro de Biología Celular y Molecular-Instituto de Investigaciones Biológicas y Tecnológicas (CEBICEM-IIByT); Facultad de Ciencias Exactas, Físicas y Naturales; Universidad Nacional de Córdoba; Argentina
| | - Andreas Zimmer
- Institute of Molecular Psychiatry; University of Bonn; Germany
| | - Liliana M. Cancela
- Departamento de Farmacología; Facultad de Ciencias Químicas; Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET); Universidad Nacional de Córdoba; Argentina
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Engel JA, Nylander I, Jerlhag E. A ghrelin receptor (GHS-R1A) antagonist attenuates the rewarding properties of morphine and increases opioid peptide levels in reward areas in mice. Eur Neuropsychopharmacol 2015; 25:2364-71. [PMID: 26508707 DOI: 10.1016/j.euroneuro.2015.10.004] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Revised: 09/17/2015] [Accepted: 10/05/2015] [Indexed: 11/28/2022]
Abstract
Gut-brain hormones such as ghrelin have recently been suggested to have a role in reward regulation. Ghrelin was traditionally known to regulate food intake and body weight homoeostasis. In addition, recent work has pin-pointed that this peptide has a novel role in drug-induced reward, including morphine-induced increase in the extracellular levels of accumbal dopamine in rats. Herein the effect of the ghrelin receptor (GHS-R1A) antagonist, JMV2959, on morphine-induced activation of the mesolimbic dopamine system was investigated in mice. In addition, the effects of JMV2959 administration on opioid peptide levels in reward related areas were investigated. In the present series of experiment we showed that peripheral JMV2959 administration, at a dose with no effect per se, attenuates the ability of morphine to cause locomotor stimulation, increase the extracellular levels of accumbal dopamine and to condition a place preference in mice. JMV2959 administration significantly increased tissue levels of Met-enkephalin-Arg(6)Phe(7) in the ventral tegmental area, dynorphin B in hippocampus and Leu-enkephalin-Arg(6) in striatum. We therefore hypothesise that JMV2959 prevents morphine-induced reward via stimulation of delta receptor active peptides in striatum and ventral tegmental areas. In addition, hippocampal peptides that activate kappa receptor may be involved in JMV2959׳s ability to regulate memory formation of reward. Given that development of drug addiction depends, at least in part, of the effects of addictive drugs on the mesolimbic dopamine system the present data suggest that GHS-R1A antagonists deserve to be elucidated as novel treatment strategies of opioid addiction.
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Affiliation(s)
- Jörgen A Engel
- Institute of Neuroscience and Physiology, Department of Pharmacology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden
| | - Ingrid Nylander
- Neuropharmacology, Addiction and Behaviour, Department of Pharmaceutical Biosciences, Uppsala University, Uppsala, Sweden
| | - Elisabet Jerlhag
- Institute of Neuroscience and Physiology, Department of Pharmacology, The Sahlgrenska Academy at the University of Gothenburg, Gothenburg, Sweden.
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Suvilehto JT, Glerean E, Dunbar RIM, Hari R, Nummenmaa L. Topography of social touching depends on emotional bonds between humans. Proc Natl Acad Sci U S A 2015; 112:13811-6. [PMID: 26504228 PMCID: PMC4653180 DOI: 10.1073/pnas.1519231112] [Citation(s) in RCA: 145] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Nonhuman primates use social touch for maintenance and reinforcement of social structures, yet the role of social touch in human bonding in different reproductive, affiliative, and kinship-based relationships remains unresolved. Here we reveal quantified, relationship-specific maps of bodily regions where social touch is allowed in a large cross-cultural dataset (N = 1,368 from Finland, France, Italy, Russia, and the United Kingdom). Participants were shown front and back silhouettes of human bodies with a word denoting one member of their social network. They were asked to color, on separate trials, the bodily regions where each individual in their social network would be allowed to touch them. Across all tested cultures, the total bodily area where touching was allowed was linearly dependent (mean r(2) = 0.54) on the emotional bond with the toucher, but independent of when that person was last encountered. Close acquaintances and family members were touched for more reasons than less familiar individuals. The bodily area others are allowed to touch thus represented, in a parametric fashion, the strength of the relationship-specific emotional bond. We propose that the spatial patterns of human social touch reflect an important mechanism supporting the maintenance of social bonds.
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Affiliation(s)
- Juulia T Suvilehto
- Department of Neuroscience and Biomedical Engineering, School of Science, Aalto University, 00076 Espoo, Finland;
| | - Enrico Glerean
- Department of Neuroscience and Biomedical Engineering, School of Science, Aalto University, 00076 Espoo, Finland
| | - Robin I M Dunbar
- Department of Experimental Psychology, University of Oxford, Ox1 3UD Oxford, United Kingdom; Department of Computer Science, Aalto University, 00076 Espoo, Finland
| | - Riitta Hari
- Department of Neuroscience and Biomedical Engineering, School of Science, Aalto University, 00076 Espoo, Finland;
| | - Lauri Nummenmaa
- Department of Neuroscience and Biomedical Engineering, School of Science, Aalto University, 00076 Espoo, Finland; Turku PET Centre and Department of Psychology, University of Turku, 20014 Turku, Finland
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Pitman KA, Borgland SL. Changes in mu-opioid receptor expression and function in the mesolimbic system after long-term access to a palatable diet. Pharmacol Ther 2015. [DOI: 10.1016/j.pharmthera.2015.07.005] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
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31
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Nummenmaa L, Manninen S, Tuominen L, Hirvonen J, Kalliokoski KK, Nuutila P, Jääskeläinen IP, Hari R, Dunbar RIM, Sams M. Adult attachment style is associated with cerebral μ-opioid receptor availability in humans. Hum Brain Mapp 2015; 36:3621-8. [PMID: 26046928 DOI: 10.1002/hbm.22866] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2015] [Revised: 05/21/2015] [Accepted: 05/21/2015] [Indexed: 12/12/2022] Open
Abstract
Human attachment behavior mediates establishment and maintenance of social relationships. Adult attachment characteristically varies on anxiety and avoidance dimensions, reflecting the tendencies to worry about the partner breaking the social bond (anxiety) and feeling uncomfortable about depending on others (avoidance). In primates and other mammals, the endogenous μ-opioid system is linked to long-term social bonding, but evidence of its role in human adult attachment remains more limited. We used in vivo positron emission tomography to reveal how variability in μ-opioid receptor (MOR) availability is associated with adult attachment in humans. We scanned 49 healthy subjects using a MOR-specific ligand [(11) C]carfentanil and measured their attachment avoidance and anxiety with the Experiences in Close Relationships-Revised scale. The avoidance dimension of attachment correlated negatively with MOR availability in the thalamus and anterior cingulate cortex, as well as the frontal cortex, amygdala, and insula. No associations were observed between MOR availability and the anxiety dimension of attachment. Our results suggest that the endogenous opioid system may underlie interindividual differences in avoidant attachment style in human adults, and that differences in MOR availability are associated with the individuals' social relationships and psychosocial well-being.
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Affiliation(s)
- Lauri Nummenmaa
- Turku PET Centre, University of Turku, Turku, 20520, Finland.,Department of Neuroscience and Biomedical Engineering, Aalto University School of Science, 00076, AALTO, Espoo, Finland.,Department of Psychology, University of Turku, 20014, Turku, Finland
| | - Sandra Manninen
- Turku PET Centre, University of Turku, Turku, 20520, Finland
| | - Lauri Tuominen
- Turku PET Centre, University of Turku, Turku, 20520, Finland.,Department of Neuroscience and Biomedical Engineering, Aalto University School of Science, 00076, AALTO, Espoo, Finland
| | - Jussi Hirvonen
- Turku PET Centre, University of Turku, Turku, 20520, Finland
| | | | - Pirjo Nuutila
- Turku PET Centre, University of Turku, Turku, 20520, Finland.,Department of Endocrinology, Turku University Hospital, 20521, Turku, Finland
| | - Iiro P Jääskeläinen
- Department of Neuroscience and Biomedical Engineering, Aalto University School of Science, 00076, AALTO, Espoo, Finland
| | - Riitta Hari
- Department of Neuroscience and Biomedical Engineering, Aalto University School of Science, 00076, AALTO, Espoo, Finland
| | - Robin I M Dunbar
- Department of Neuroscience and Biomedical Engineering, Aalto University School of Science, 00076, AALTO, Espoo, Finland.,Department of Experimental Psychology, University of Oxford, Oxford, Ox1 3UD, UK
| | - Mikko Sams
- Department of Neuroscience and Biomedical Engineering, Aalto University School of Science, 00076, AALTO, Espoo, Finland
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Hamza CA, Willoughby T. Nonsuicidal Self-Injury and Affect Regulation: Recent Findings From Experimental and Ecological Momentary Assessment Studies and Future Directions. J Clin Psychol 2015; 71:561-74. [DOI: 10.1002/jclp.22174] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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34
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Johnston CE, Herschel DJ, Lasek AW, Hammer RP, Nikulina EM. Knockdown of ventral tegmental area mu-opioid receptors in rats prevents effects of social defeat stress: implications for amphetamine cross-sensitization, social avoidance, weight regulation and expression of brain-derived neurotrophic factor. Neuropharmacology 2015; 89:325-34. [PMID: 25446676 PMCID: PMC4293250 DOI: 10.1016/j.neuropharm.2014.10.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 09/14/2014] [Accepted: 10/08/2014] [Indexed: 10/24/2022]
Abstract
Social defeat stress causes social avoidance and long-lasting cross-sensitization to psychostimulants, both of which are associated with increased brain-derived neurotrophic factor (BDNF) expression in the ventral tegmental area (VTA). Moreover, social stress upregulates VTA mu-opioid receptor (MOR) mRNA. In the VTA, MOR activation inhibits GABA neurons to disinhibit VTA dopamine neurons, thus providing a role for VTA MORs in the regulation of psychostimulant sensitization. The present study determined the effect of lentivirus-mediated MOR knockdown in the VTA on the consequences of intermittent social defeat stress, a salient and profound stressor in humans and rodents. Social stress exposure induced social avoidance and attenuated weight gain in animals with non-manipulated VTA MORs, but both these effects were prevented by VTA MOR knockdown. Rats with non-manipulated VTA MOR expression exhibited cross-sensitization to amphetamine challenge (1.0 mg/kg, i.p.), evidenced by a significant augmentation of locomotion. By contrast, knockdown of VTA MORs prevented stress-induced cross-sensitization without blunting the locomotor-activating effects of amphetamine. At the time point corresponding to amphetamine challenge, immunohistochemical analysis was performed to examine the effect of stress on VTA BDNF expression. Prior stress exposure increased VTA BDNF expression in rats with non-manipulated VTA MOR expression, while VTA MOR knockdown prevented stress-induced expression of VTA BDNF. Taken together, these results suggest that upregulation of VTA MOR is necessary for the behavioral and biochemical changes induced by social defeat stress. Elucidating VTA MOR regulation of stress effects on the mesolimbic system may provide new therapeutic targets for treating stress-induced vulnerability to substance abuse.
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MESH Headings
- Amphetamine/pharmacology
- Analgesics, Opioid/pharmacokinetics
- Animals
- Body Weight/drug effects
- Brain-Derived Neurotrophic Factor/metabolism
- Cell Count
- Central Nervous System Stimulants/pharmacology
- Disease Models, Animal
- Escape Reaction/drug effects
- Escape Reaction/physiology
- Handling, Psychological
- Male
- Motor Activity/drug effects
- Protein Binding/drug effects
- Rats
- Rats, Long-Evans
- Rats, Sprague-Dawley
- Receptors, Opioid, mu/deficiency
- Receptors, Opioid, mu/genetics
- Stress, Psychological/metabolism
- Stress, Psychological/pathology
- Stress, Psychological/prevention & control
- Transduction, Genetic
- Ventral Tegmental Area/metabolism
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Affiliation(s)
- Caitlin E Johnston
- Department of Basic Medical Sciences, University of Arizona College of Medicine, Phoenix, AZ, USA
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35
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Investigating anhedonia in a non-conventional species: Do some riding horses Equus caballus display symptoms of depression? Appl Anim Behav Sci 2015. [DOI: 10.1016/j.applanim.2014.11.007] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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36
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Bialy M, Strefnel M, Nikolaev-Diak A, Socha A, Nikolaev E, Boguszewski PM. Sexual performance and precontact 50-kHz ultrasonic vocalizations in WAG/Rij rats: effects of opioid receptor treatment. Epilepsy Behav 2014; 39:66-72. [PMID: 25216068 DOI: 10.1016/j.yebeh.2014.08.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Revised: 07/07/2014] [Accepted: 08/02/2014] [Indexed: 12/21/2022]
Abstract
WAG/Rij rats are genetically selected animals that model absence epilepsy in rats. Ultrasonic vocalizations and sexual behavior - both ethologically relevant markers of reward system functioning - are poorly described in this strain. The aim of our experiment was to investigate reward-dependent precontact 50-kHz vocalizations (PVs) and copulatory behavior as well as the effects of opioid receptor treatment on such behaviors in sexually experienced WAG/Rij males and rats from two control strains: Sprague-Dawley and Crl: Han Wistar. We analyzed the effects of the opioid receptor antagonist naltrexone (3 mg/kg) and the agonist morphine (1 mg/kg) administration. Additionally, we analyzed the initiation of copulation in sexually naïve males before drug treatment. A significantly lower number of sexually naïve WAG/Rij rats initiated copulation. Sexually experienced WAG/Rij males differed at the control session (after physiological saline treatment) compared with Sprague-Dawley rats: WAG/Rij rats displayed more 50-kHz precontact vocalizations and had longer mount and intromission latencies, longer ejaculation latency, longer postejaculatory latency to exploration, longer 22-kHz vocalization duration after ejaculation, and longer postejaculatory intromission latency. Compared with Crl: Han Wistar rats, WAG/Rij males displayed longer mount latency and shorter 22-kHz vocalization duration. Neither naltrexone nor morphine affected PVs in all groups. On the other hand, opioid receptor treatment differently influenced the number of intromissions required to achieve ejaculation and 22-kHz postejaculatory vocalization duration in WAG/Rij rats than in both control groups. This suggests functional differences in the opioid system in this strain. As a result of the number of males that initiated copulation as well as the number of intromissions to ejaculation and 22-kHz postejaculatory vocalizations which all depend on D1 receptor activation, we suggest that the proportion of opioid receptor to D1 receptors in WAG/Rij rats is different when compared with the control strains. The reward system of Wag/Rij rats with absence epilepsy is sensitive to social rewards (high level of precontact 50-kHz ultrasounds) although this strain displays a lower level of sexual motivation (longer mount latency) compared with other control strains. A lower number of sexually naïve rats initiating copulation and longer mount latency in sexually experienced males could suggest a moderate depressive-like syndrome in this strain of rats.
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Affiliation(s)
- Michal Bialy
- Department of Experimental and Clinical Physiology, Banacha 1B, The Medical University of Warsaw, 02-097 Warsaw, Poland.
| | - Michal Strefnel
- Department of Experimental and Clinical Physiology, Banacha 1B, The Medical University of Warsaw, 02-097 Warsaw, Poland
| | - Anna Nikolaev-Diak
- Teaching Department of Gynaecology and Assisted Birth, The Medical University of Warsaw, Żwirki i Wigury 81, 02-091 Warsaw, Poland
| | - Anna Socha
- Department of Experimental and Clinical Physiology, Banacha 1B, The Medical University of Warsaw, 02-097 Warsaw, Poland
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Tarr B, Launay J, Dunbar RIM. Music and social bonding: "self-other" merging and neurohormonal mechanisms. Front Psychol 2014; 5:1096. [PMID: 25324805 PMCID: PMC4179700 DOI: 10.3389/fpsyg.2014.01096] [Citation(s) in RCA: 178] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Accepted: 09/10/2014] [Indexed: 01/13/2023] Open
Abstract
It has been suggested that a key function of music during its development and spread amongst human populations was its capacity to create and strengthen social bonds amongst interacting group members. However, the mechanisms by which this occurs have not been fully discussed. In this paper we review evidence supporting two thus far independently investigated mechanisms for this social bonding effect: self-other merging as a consequence of inter-personal synchrony, and the release of endorphins during exertive rhythmic activities including musical interaction. In general, self-other merging has been experimentally investigated using dyads, which provide limited insight into large-scale musical activities. Given that music can provide an external rhythmic framework that facilitates synchrony, explanations of social bonding during group musical activities should include reference to endorphins, which are released during synchronized exertive movements. Endorphins (and the endogenous opioid system (EOS) in general) are involved in social bonding across primate species, and are associated with a number of human social behaviors (e.g., laughter, synchronized sports), as well as musical activities (e.g., singing and dancing). Furthermore, passively listening to music engages the EOS, so here we suggest that both self-other merging and the EOS are important in the social bonding effects of music. In order to investigate possible interactions between these two mechanisms, future experiments should recreate ecologically valid examples of musical activities.
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Affiliation(s)
- Bronwyn Tarr
- Social and Evolutionary Neuroscience Research Group, Department of Experimental Psychology, University of OxfordOxford, UK
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Łabuzek K, Beil S, Beil-Gawełczyk J, Gabryel B, Franik G, Okopień B. The latest achievements in the pharmacotherapy of gambling disorder. Pharmacol Rep 2014; 66:811-20. [PMID: 25149985 DOI: 10.1016/j.pharep.2014.05.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2014] [Revised: 04/28/2014] [Accepted: 05/06/2014] [Indexed: 12/16/2022]
Abstract
Gambling disorder (GD) is becoming increasingly prevalent both among adults and adolescents. Unfortunately, this disorder is largely underestimated, while it can still lead to serious social and personal consequences, including criminal behavior or suicide attempts. In the past, the only means of treating gambling were psychobehavioral therapies. Nowadays, this disorder could also respond to many drugs from different classes such as opioid antagonists, serotonin selective reuptake inhibitors, mood stabilizers, atypical antipsychotics or glutamatergic agents. This review presents current pharmacological strategies and the results of clinical trials evaluating the efficacy of pharmacotherapy for GD. It also discusses the importance of distinguishing different pathological gambler subtypes such as impulsive, obsessive-compulsive and addictive subtypes as this may have serious pharmacological implications.
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Affiliation(s)
- Krzysztof Łabuzek
- Department of Internal Medicine and Clinical Pharmacology, Medical University of Silesia, Katowice, Poland.
| | - Sonia Beil
- Department of Internal Medicine and Clinical Pharmacology, Medical University of Silesia, Katowice, Poland
| | | | - Bożena Gabryel
- Department of Pharmacology, Medical University of Silesia, Katowice, Poland
| | - Grzegorz Franik
- Department of Gynecological Endocrinology, Medical University of Silesia, Katowice, Poland
| | - Bogusław Okopień
- Department of Internal Medicine and Clinical Pharmacology, Medical University of Silesia, Katowice, Poland
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Hasvik E, Iordanova Schistad E, Grøvle L, Julsrud Haugen A, Røe C, Gjerstad J. Subjective health complaints in patients with lumbar radicular pain and disc herniation are associated with a sex - OPRM1 A118G polymorphism interaction: a prospective 1-year observational study. BMC Musculoskelet Disord 2014; 15:161. [PMID: 24884878 PMCID: PMC4038376 DOI: 10.1186/1471-2474-15-161] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2013] [Accepted: 05/09/2014] [Indexed: 01/25/2023] Open
Abstract
Background Earlier observations show that development of persistent pain may be associated with the genetic variability in the gene encoding for the μ-opioid receptor 1, the OPRM1 A118G (rs1799971). The aim of this study was to investigate the association between OPRM1 genotype and subjective health complaints in patients with radicular pain and disc herniation. Methods A prospective, 1-year observational study was conducted at a hospital back clinic, including 118 Caucasian patients with lumbar radicular pain and MRI confirmed disc herniation. Single nucleotide polymorphism genotyping regarding the OPRM1 A118G was performed. The data of individuals with AA versus AG or GG were analysed separately by linear mixed models. The Subjective Health Complaints Inventory (0-81) including 27 common complaints experienced the previous month on a scale from not at all (0) to severe (3) was used as outcome. Pain, prior duration of leg pain, age, smoking status, and lumbar disc surgery were considered as covariates. Results In total 23 of 118 patients were carriers of the OPRM1 G-allele. All patients except female carriers of the G-allele reported a decrease in pain from baseline to 1 year. Female carriers of the G-allele reported significantly higher subjective health complaints score during the study time span than male carriers of the G-allele when controlling for pain and pain duration. Conclusion The present data indicate that, when controlling for pain intensity and duration, subjective health complaints are associated with a sex - OPRM1 A118G polymorphism interaction in patients with radicular pain.
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Affiliation(s)
- Eivind Hasvik
- National Institute of Occupational Health, Oslo, Norway.
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Bakker JM, Lieverse R, Menne-Lothmann C, Viechtbauer W, Pishva E, Kenis G, Geschwind N, Peeters F, van Os J, Wichers M. Therapygenetics in mindfulness-based cognitive therapy: do genes have an impact on therapy-induced change in real-life positive affective experiences? Transl Psychiatry 2014; 4:e384. [PMID: 24755993 PMCID: PMC4012287 DOI: 10.1038/tp.2014.23] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2013] [Revised: 03/05/2014] [Accepted: 03/08/2014] [Indexed: 01/27/2023] Open
Abstract
Positive affect (PA) has an important role in resilience against depression and has been shown to increase with mindfulness-based cognitive therapy (MBCT). To elucidate the underlying mechanisms of change in PA as well as develop insights that may benefit personalized medicine, the current study examined the contribution of genetic variation to individual differences in change in PA in response to MBCT. Individuals (n=126) with residual depressive symptoms were randomized to either an MBCT group or treatment as usual. PA was assessed using experience sampling methodology (ESM). Single-nucleotide polymorphisms (SNPs) in genes known to be involved in reward functioning were selected. SNPs in the genes for brain-derived neurotrophic factor (BDNF), the muscarinic acetylcholine receptor M2 (CHRM2), the dopamine receptor D4 (DRD4) and the μ1 opioid receptor (OPRM1) significantly moderated the impact of treatment condition over time on PA. Genetic variation in the genes for CHRM2 and OPRM1 specifically had an impact on the level of PA following MBCT. The current study shows that variation in response to MBCT may be contingent on genetic factors associated with the regulation of PA. These findings contribute to our understanding of the processes moderating response to treatment and prediction of treatment outcome.
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Affiliation(s)
- J M Bakker
- Department of Psychiatry and Psychology, School of Mental Health and Neuroscience, Maastricht University Medical Centre, Maastricht, The Netherlands,Department of Psychiatry and Psychology, School of Mental Health and Neuroscience, Maastricht University Medical Centre, PO Box 616, 6200 MD, Maastricht, The Netherlands. E-mail:
| | - R Lieverse
- Department of Psychiatry and Psychology, School of Mental Health and Neuroscience, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - C Menne-Lothmann
- Department of Psychiatry and Psychology, School of Mental Health and Neuroscience, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - W Viechtbauer
- Department of Psychiatry and Psychology, School of Mental Health and Neuroscience, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - E Pishva
- Department of Psychiatry and Psychology, School of Mental Health and Neuroscience, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - G Kenis
- Department of Psychiatry and Psychology, School of Mental Health and Neuroscience, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - N Geschwind
- Department of Clinical Psychological Science, Faculty of Psychology and Neuroscience, Maastricht University, Maastricht, The Netherlands
| | - F Peeters
- Department of Psychiatry and Psychology, School of Mental Health and Neuroscience, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - J van Os
- Department of Psychiatry and Psychology, School of Mental Health and Neuroscience, Maastricht University Medical Centre, Maastricht, The Netherlands,Department of Psychosis Studies, Institute of Psychiatry, King's College, King's Health Partners, London, UK
| | - M Wichers
- Department of Psychiatry and Psychology, School of Mental Health and Neuroscience, Maastricht University Medical Centre, Maastricht, The Netherlands
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Brom M, Both S, Laan E, Everaerd W, Spinhoven P. The role of conditioning, learning and dopamine in sexual behavior: a narrative review of animal and human studies. Neurosci Biobehav Rev 2013; 38:38-59. [PMID: 24211372 DOI: 10.1016/j.neubiorev.2013.10.014] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2013] [Revised: 10/22/2013] [Accepted: 10/29/2013] [Indexed: 12/24/2022]
Abstract
Many theories of human sexual behavior assume that sexual stimuli obtain arousing properties through associative learning processes. It is widely accepted that classical conditioning contributes to the etiology of both normal and maladaptive human behaviors. Despite the hypothesized importance of basic learning processes in sexual behavior, research on classical conditioning of the sexual response in humans is scarce. In the present paper, animal studies and studies in humans on the role of pavlovian conditioning on sexual responses are reviewed. Animal research shows robust, direct effects of conditioning processes on partner- and place preference. On the contrast, the empirical research with humans in this area is limited and earlier studies within this field are plagued by methodological confounds. Although recent experimental demonstrations of human sexual conditioning are neither numerous nor robust, sexual arousal showed to be conditionable in both men and women. The present paper serves to highlight the major empirical findings and to renew the insight in how stimuli can acquire sexually arousing value. Hereby also related neurobiological processes in reward learning are discussed. Finally, the connections between animal and human research on the conditionability of sexual responses are discussed, and suggestions for future directions in human research are given.
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Affiliation(s)
- Mirte Brom
- Institute of Psychology, Clinical, Health and Neuropsychology Unit, Leiden University, The Netherlands; Department of Psychosomatic Gynaecology and Sexology, Leiden University Medical Center, Leiden, The Netherlands.
| | - Stephanie Both
- Department of Psychosomatic Gynaecology and Sexology, Leiden University Medical Center, Leiden, The Netherlands
| | - Ellen Laan
- Department of Sexology and Psychosomatic Obstetrics and Gynaecology, Academic Medical Center, University of Amsterdam, Amsterdam, The Netherlands
| | - Walter Everaerd
- Department Clinical Psychology, University of Amsterdam, Amsterdam, The Netherlands
| | - Philip Spinhoven
- Institute of Psychology, Clinical, Health and Neuropsychology Unit, Leiden University, The Netherlands; Department of Psychiatry, Leiden University Medical Center, The Netherlands
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Peciña S, Berridge KC. Dopamine or opioid stimulation of nucleus accumbens similarly amplify cue-triggered 'wanting' for reward: entire core and medial shell mapped as substrates for PIT enhancement. Eur J Neurosci 2013; 37:1529-40. [PMID: 23495790 PMCID: PMC4028374 DOI: 10.1111/ejn.12174] [Citation(s) in RCA: 125] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2012] [Revised: 01/27/2013] [Accepted: 01/30/2013] [Indexed: 12/18/2022]
Abstract
Pavlovian cues [conditioned stimulus (CS+)] often trigger intense motivation to pursue and consume related reward [unconditioned stimulus (UCS)]. But cues do not always trigger the same intensity of motivation. Encountering a reward cue can be more tempting on some occasions than on others. What makes the same cue trigger more intense motivation to pursue reward on a particular encounter? The answer may be the level of incentive salience ('wanting') that is dynamically generated by mesocorticolimbic brain systems, influenced especially by dopamine and opioid neurotransmission in the nucleus accumbens (NAc) at that moment. We tested the ability of dopamine stimulation (by amphetamine microinjection) vs. mu opioid stimulation [by d-Ala, nMe-Phe, Glyol-enkephalin (DAMGO) microinjection] of either the core or shell of the NAc to amplify cue-triggered levels of motivation to pursue sucrose reward, measured with a Pavlovian-Instrumental Transfer (PIT) procedure, a relatively pure assay of incentive salience. Cue-triggered 'wanting' in PIT was enhanced by amphetamine or DAMGO microinjections equally, and also equally at nearly all sites throughout the entire core and medial shell (except for a small far-rostral strip of shell). NAc dopamine/opioid stimulations specifically enhanced CS+ ability to trigger phasic peaks of 'wanting' to obtain UCS, without altering baseline efforts when CS+ was absent. We conclude that dopamine/opioid stimulation throughout nearly the entire NAc can causally amplify the reactivity of mesocorticolimbic circuits, and so magnify incentive salience or phasic UCS 'wanting' peaks triggered by a CS+. Mesolimbic amplification of incentive salience may explain why a particular cue encounter can become irresistibly tempting, even when previous encounters were successfully resisted before.
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Affiliation(s)
- Susana Peciña
- Department of Behavioral Sciences, University of Michigan-Dearborn, Dearborn, MI, USA.
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Abstract
OBJECTIVE Although previous research provides evidence for the role of rewarding activities in reducing hypothalamic-pituitary-adrenal axis responses to stress, no studies have tested whether rewards can buffer cortisol responses in humans undergoing social stressors. METHOD This study experimentally investigated whether viewing appetitive rewarding pictures reduces cortisol responses to an acute stress challenge. Fifty-four heterosexual men were randomly assigned to view either mildly erotic (reward) or neutral images (control) of mixed-sex couples before completing the Trier Social Stress Test (TSST). RESULTS Participants in the reward condition had significantly lower area-under-the-curve cortisol reactivity to the TSST (mean [M] = 363.46) in comparison with participants in the control group (M = 807.06; F(1,46) = 4.84, p = .033, η(2) = 0.095). Reward participants also had improved cognitive performance on the math portion of the TSST (M = 20.74) in comparison with control participants (M = 13.82; F(44) = 5.44, p = .024, η(2) = 0.11). The stress-buffering effects of reward were specific to hypothalamic-pituitary-adrenal axis reactivity: the reward and control groups did not differ on psychological perceptions of anticipatory or poststress perceptions, heart rate, or blood pressure responses. CONCLUSIONS This research provides the first evidence linking the experience of reward with reduced stress reactivity in humans and suggests a potential novel reward pathway for coping under stress.
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Price R, Asenjo J, Christou N, Backman S, Schweinhardt P. The role of excess subcutaneous fat in pain and sensory sensitivity in obesity. Eur J Pain 2013; 17:1316-26. [DOI: 10.1002/j.1532-2149.2013.00315.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/09/2013] [Indexed: 12/26/2022]
Affiliation(s)
| | | | - N.V. Christou
- McGill University Department of Surgery; Royal Victoria Hospital; Montreal; Canada
| | - S.B. Backman
- McGill University Department of Anesthesia; Royal Victoria Hospital; Montreal; Canada
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Kelm-Nelson CA, Stevenson SA, Cordes MA, Riters LV. Modulation of male song by naloxone in the medial preoptic nucleus. Behav Neurosci 2013; 127:451-7. [PMID: 23544595 DOI: 10.1037/a0032329] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Studies in songbirds implicate opioid neuropeptides in singing behavior; however, past results are contradictory. In starlings, the effect of opioid manipulations on sexually motivated courtship song differed in birds naturally singing at low compared to high rates, and mu-opioid receptors were denser in several regions, including the medial preoptic nucleus (POM) in low singing males. In the present study, we found that low singing male starlings also had significantly higher enkephalin (ENK) immunolabeling densities in the POM than high singers. We blocked opioid receptor activity in the POM with naloxone injections and found that this increased both song rate and song bout length in low singers, suggesting that high densities of mu receptors and ENK in the POM actively suppress song in these males. In contrast to its effects on low singers, naloxone in the POM of high singers dose dependently decreased song rate and tended to reduce song bout length. This suggests that at least some level of opioid activity in POM is necessary for song production. Our results are the first to demonstrate that direct administration of naloxone into the POM influences sexually motivated song, and that effects differ depending on an individual's initial rate of song and associated density of ENK. We suggest that differential effects seen in past studies of opioids and song may in part be explained by differences in the natural song rate of subjects and accompanying differences in ENK activity and neural substrate sensitivity to opioids in POM.
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Lev-Ran S, Balchand K. New Onset Non-Suicidal Self-Injury in a 57-Year-Old Woman with Co-morbid Depression and Alcohol Dependence. Am J Addict 2013; 22:178-9. [DOI: 10.1111/j.1521-0391.2013.00337.x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2012] [Revised: 04/10/2012] [Accepted: 05/04/2012] [Indexed: 11/28/2022] Open
Affiliation(s)
- Shaul Lev-Ran
- Addictions Program, Centre for Addiction and Mental Health; University of Toronto; Toronto, Ontario; Canada
| | - Kam Balchand
- Addictions Program, Centre for Addiction and Mental Health; University of Toronto; Toronto, Ontario; Canada
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Toronchuk JA, Ellis GFR. Affective neuronal selection: the nature of the primordial emotion systems. Front Psychol 2013; 3:589. [PMID: 23316177 PMCID: PMC3540967 DOI: 10.3389/fpsyg.2012.00589] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2012] [Accepted: 12/12/2012] [Indexed: 11/13/2022] Open
Abstract
Based on studies in affective neuroscience and evolutionary psychiatry, a tentative new proposal is made here as to the nature and identification of primordial emotional systems. Our model stresses phylogenetic origins of emotional systems, which we believe is necessary for a full understanding of the functions of emotions and additionally suggests that emotional organizing systems play a role in sculpting the brain during ontogeny. Nascent emotional systems thus affect cognitive development. A second proposal concerns two additions to the affective systems identified by Panksepp. We suggest there is substantial evidence for a primary emotional organizing program dealing with power, rank, dominance, and subordination which instantiates competitive and territorial behavior and is an evolutionary contributor to self-esteem in humans. A program underlying disgust reactions which originally functioned in ancient vertebrates to protect against infection and toxins is also suggested.
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Affiliation(s)
- Judith A Toronchuk
- Department of Psychology, Trinity Western University Langley, BC, Canada ; Department of Biology, Trinity Western University Langley, BC, Canada
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Gugusheff JR, Ong ZY, Muhlhausler BS. A maternal “junk‐food” diet reduces sensitivity to the opioid antagonist naloxone in offspring postweaning. FASEB J 2012; 27:1275-84. [DOI: 10.1096/fj.12-217653] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Jessica R. Gugusheff
- FOODplus Research CentreSchool of Agriculture, Food, and WineThe University of AdelaideAdelaideSouth AustraliaAustralia
| | - Zhi Yi Ong
- FOODplus Research CentreSchool of Agriculture, Food, and WineThe University of AdelaideAdelaideSouth AustraliaAustralia
- Sansom Institute for Health ResearchSchool of Pharmacy and Medical ScienceUniversity of South AustraliaAdelaideSouth AustraliaAustralia
| | - Beverly S. Muhlhausler
- FOODplus Research CentreSchool of Agriculture, Food, and WineThe University of AdelaideAdelaideSouth AustraliaAustralia
- Sansom Institute for Health ResearchSchool of Pharmacy and Medical ScienceUniversity of South AustraliaAdelaideSouth AustraliaAustralia
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Yoo JH, Kitchen I, Bailey A. The endogenous opioid system in cocaine addiction: what lessons have opioid peptide and receptor knockout mice taught us? Br J Pharmacol 2012; 166:1993-2014. [PMID: 22428846 DOI: 10.1111/j.1476-5381.2012.01952.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
Abstract
Cocaine addiction has become a major concern in the UK as Britain tops the European 'league table' for cocaine abuse. Despite its devastating health and socio-economic consequences, no effective pharmacotherapy for treating cocaine addiction is available. Identifying neurochemical changes induced by repeated drug exposure is critical not only for understanding the transition from recreational drug use towards compulsive drug abuse but also for the development of novel targets for the treatment of the disease and especially for relapse prevention. This article focuses on the effects of chronic cocaine exposure and withdrawal on each of the endogenous opioid peptides and receptors in rodent models. In addition, we review the studies that utilized opioid peptide or receptor knockout mice in order to identify and/or clarify the role of different components of the opioid system in cocaine-addictive behaviours and in cocaine-induced alterations of brain neurochemistry. The review of these studies indicates a region-specific activation of the µ-opioid receptor system following chronic cocaine exposure, which may contribute towards the rewarding effect of the drug and possibly towards cocaine craving during withdrawal followed by relapse. Cocaine also causes a region-specific activation of the κ-opioid receptor/dynorphin system, which may antagonize the rewarding effect of the drug, and at the same time, contribute to the stress-inducing properties of the drug and the triggering of relapse. These conclusions have important implications for the development of effective pharmacotherapy for the treatment of cocaine addiction and the prevention of relapse.
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Affiliation(s)
- Ji Hoon Yoo
- Division of Biochemistry, Faculty of Health & Medical Sciences, University of Surrey, Guildford, Surrey, UK
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D'Amato FR, Pavone F. Modulation of nociception by social factors in rodents: contribution of the opioid system. Psychopharmacology (Berl) 2012; 224:189-200. [PMID: 22993049 DOI: 10.1007/s00213-012-2863-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2012] [Accepted: 09/01/2012] [Indexed: 12/30/2022]
Abstract
RATIONALE The opioid system is involved in the regulation of several behavioral and physiological responses, controlling pain, reward, and addictive behaviors. Opioid administration, depending on drugs and doses, usually affects sociability reducing interactions between conspecifics, whereas some affiliative behaviors such as sexual activity, social grooming, and play behavior increase the endogenous opioid activity. OBJECTIVES The possible interaction between endogenous opioids released during socio/sexual behavior and their analgesic effect on pain response is reviewed in the rodent literature. RESULTS Direct evidence for socially mediated opioid changes resulting in increase in nociceptive threshold derives from studies exploring the effects of defeat experiences, social isolation, maternal, sexual behavior, and social reunion among kin or familiar animals in laboratory rodents. Indirect evidence for endogenous activation of the opioid system, possibly affecting pain sensitivity, derives from studies investigating the relevance of natural social reward using the conditioned place preference protocols or analyzing ultrasonic vocalizations associated to positive affective contexts. Finally, genetic and epigenetic factors that affect the opioid system during development are reported to be involved in modulating the response to social stimuli as well as nociception. CONCLUSIONS All studies highlight the relevance of affiliative contact behavior between conspecifics that is responsible for the activation of the endogenous mu-opioid system, inducing nociceptive threshold increase.
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Affiliation(s)
- Francesca R D'Amato
- Cell Biology and Neurobiology Institute, National Research Council, Via del Fosso di Fiorano 64, 00143 Rome, Italy.
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