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Negishi K, Fredriksson I, Bossert JM, Zangen A, Shaham Y. Relapse after electric barrier-induced voluntary abstinence: A review. Curr Opin Neurobiol 2024; 86:102856. [PMID: 38508102 DOI: 10.1016/j.conb.2024.102856] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2024] [Revised: 02/23/2024] [Accepted: 02/25/2024] [Indexed: 03/22/2024]
Abstract
Relapse to drug use during abstinence is a defining feature of addiction. To date, however, results from studies using rat relapse/reinstatement models have yet to result in FDA-approved medications for relapse prevention. To address this translational gap, we and others have developed rat models of relapse after voluntary abstinence from drug self-administration. One of these models is the electric barrier conflict model. Here, we introduce the model, and then review studies on behavioral and neuropharmacological mechanisms of cue-induced relapse and incubation of drug seeking (time-dependent increase in drug seeking during abstinence) after electric barrier-induced abstinence. We also briefly discuss future directions and potential clinical implications. One major conclusion of our review is that the brain mechanisms controlling drug relapse after electrical barrier-induced voluntary abstinence are likely distinct from those controlling relapse after homecage forced abstinence.
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Affiliation(s)
| | - Ida Fredriksson
- Center for Social and Affective Neuroscience, Linköping University, Linköping, Sweden
| | | | - Abraham Zangen
- Department of Life Science and the Zelman Neuroscience Center, Ben-Gurion University, Beer Sheba, Israel
| | - Yavin Shaham
- Behavioral Neuroscience Branch, IRP/NIDA/NIH, Baltimore, MD, USA.
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2
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Gancarz AM, Hagarty DP, Cobb MM, Kausch MA, Krieg B, Alammari N, Gilbert K, Russo J, Dietz DM. Operant novelty seeking predicts cue-induced reinstatement following cocaine but not water reinforcement in male rats. Psychopharmacology (Berl) 2023; 240:2201-2215. [PMID: 37552291 PMCID: PMC10506955 DOI: 10.1007/s00213-023-06441-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2023] [Accepted: 07/25/2023] [Indexed: 08/09/2023]
Abstract
RATIONALE An important facet of cocaine addiction is a high propensity to relapse, with increasing research investigating factors that predispose individuals toward uncontrolled drug use and relapse. A personality trait linked to drug addiction is high sensation seeking, i.e., a preference for novel sensations/experiences. In an animal model of sensation seeking, operant novelty seeking predicts the acquisition of drug self-administration. OBJECTIVE The primary goal of this research was to evaluate the hypothesis that sensitivity to the reinforcing effects of novel sensory stimuli predicts more intensive aspects of drug-taking behaviors, such as relapse. METHODS Rats were first tested for Operant Novelty Seeking, during which responses resulted in complex visual/auditory stimuli. Next, rats were trained to respond to water/cocaine reinforcers signaled by a cue light. Finally, rats were exposed to extinction in the absence of discrete cues and subsequently tested in a single session of cue-induced reinstatement, during which active responses resulted in cues previously paired with water/cocaine delivery. RESULTS The present study showed operant responses to produce novel sensory stimuli positively correlate with responding for cocaine during self-administration and during discrete cue-induced reinstatement, but no association with performance during extinction. A different pattern of associations was observed for a natural reward, in this case, water reinforcement. Here, the degree of novelty seeking also correlated with responding to water reinforcement and extinction responding; however, operant novelty seeking did not correlate with responding to water cues during testing of cue-induced reinstatement. Taken together, the incongruence of relationships indicates an underlying difference between natural and drug reinforcers. CONCLUSION In summary, we found a reinforcer-dependent relationship between operant novelty seeking (i.e., sensation seeking) and responsivity to extinction and discrete cues signaling availability for cocaine (i.e., craving), demonstrating the validity of the operant novelty seeking model to investigate drug seeking and relapse.
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Affiliation(s)
- Amy M Gancarz
- Department of Psychology, California State University, Bakersfield, Dorothy Donahoe Hall (DDH) H106, 9001 Stockdale Highway, Bakersfield, CA, 93311, USA.
| | - Devin P Hagarty
- Department of Psychology, California State University, Bakersfield, Dorothy Donahoe Hall (DDH) H106, 9001 Stockdale Highway, Bakersfield, CA, 93311, USA
| | - Moriah M Cobb
- Department of Psychology, California State University, Bakersfield, Dorothy Donahoe Hall (DDH) H106, 9001 Stockdale Highway, Bakersfield, CA, 93311, USA
| | - Michael A Kausch
- Department of Psychology, California State University, Bakersfield, Dorothy Donahoe Hall (DDH) H106, 9001 Stockdale Highway, Bakersfield, CA, 93311, USA
| | - Brandon Krieg
- Department of Psychology, California State University, Bakersfield, Dorothy Donahoe Hall (DDH) H106, 9001 Stockdale Highway, Bakersfield, CA, 93311, USA
| | - Nora Alammari
- Department of Psychology, California State University, Bakersfield, Dorothy Donahoe Hall (DDH) H106, 9001 Stockdale Highway, Bakersfield, CA, 93311, USA
| | - Kameron Gilbert
- Department of Psychology, California State University, Bakersfield, Dorothy Donahoe Hall (DDH) H106, 9001 Stockdale Highway, Bakersfield, CA, 93311, USA
| | - Jacqueline Russo
- Department of Psychology, California State University, Bakersfield, Dorothy Donahoe Hall (DDH) H106, 9001 Stockdale Highway, Bakersfield, CA, 93311, USA
| | - David M Dietz
- Clinical and Research Institute On Addictions, University at Buffalo, Buffalo, NY, USA
- Department of Pharmacology and Toxicology, Jacobs School of Medicine and Biomedical Sciences, University at Buffalo, Buffalo, NY, USA
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3
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Lai CW, Chang CH. Pharmacological activation of the amygdala, but not single prolonged footshock-induced acute stress, interferes with cue-induced motivation toward food rewards in rats. Front Behav Neurosci 2023; 17:1252868. [PMID: 37781505 PMCID: PMC10538645 DOI: 10.3389/fnbeh.2023.1252868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 08/25/2023] [Indexed: 10/03/2023] Open
Abstract
In the face of threats, animals adapt their behaviors to cope with the situation. Under such circumstances, irrelevant behaviors are usually suppressed. In this study, we examined whether food-seeking motivation would decrease under activation of the amygdala, an important nucleus in the regulation of stress response in the central nervous system, or after a physical acute stress session. In Experiment 1, we pharmacologically activated the basolateral nucleus (BLA) or the central nucleus of the amygdala (CeA) before a cue-induced reinstatement test in rats. Our results showed that activation of the BLA or the CeA abolished cue-induced motivation toward food rewards, while locomotor activity and free food intake were not affected. In Experiments 2 and 3, we further assessed anxiety and despair levels, as well as cue-induced reinstatement, after a single prolonged footshock-induced acute stress in rats. Behaviorally, acute stress did not affect anxiety level, despair level, or cue-induced motivation toward food rewards. Physiologically, there was no difference in cellular activities of the amygdala immediately after acute stress. To conclude, our results suggested that pharmacological activation of the amygdala decreased cue-induced motivation toward food reward. However, physiological acute stress did not immediately interfere with the negative emotions, motivation, or amygdala activities of the animals.
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Affiliation(s)
- Chien-Wen Lai
- Institute of Molecular Medicine, National Tsing Hua University, Hsinchu, Taiwan
| | - Chun-hui Chang
- Institute of Molecular Medicine, National Tsing Hua University, Hsinchu, Taiwan
- Institute of Systems Neuroscience, National Tsing Hua University, Hsinchu, Taiwan
- Brain Research Center, National Tsing Hua University, Hsinchu, Taiwan
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4
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Brown RM, James MH. Binge eating, overeating and food addiction: Approaches for examining food overconsumption in laboratory rodents. Prog Neuropsychopharmacol Biol Psychiatry 2023; 123:110717. [PMID: 36623582 PMCID: PMC10162020 DOI: 10.1016/j.pnpbp.2023.110717] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 12/29/2022] [Accepted: 01/04/2023] [Indexed: 01/09/2023]
Abstract
Overeating ranges in severity from casual overindulgence to an overwhelming drive to consume certain foods. At its most extreme, overeating can manifest as clinical diagnoses such as binge eating disorder or bulimia nervosa, yet subclinical forms of overeating such as emotional eating or uncontrolled eating can still have a profoundly negative impact on health and wellbeing. Although rodent models cannot possibly capture the full spectrum of disordered overeating, studies in laboratory rodents have substantially progressed our understanding of the neurobiology of overconsumption. These experimental approaches range from simple food-exposure protocols that promote binge-like eating and the development of obesity, to more complex operant procedures designed to examine distinct 'addiction-like' endophenotypes for food. This review provides an overview of these experimental approaches, with the view to providing a comprehensive resource for preclinical investigators seeking to utilize behavioural models for studying the neural systems involved in food overconsumption.
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Affiliation(s)
- Robyn M Brown
- Department of Biochemistry and Pharmacology, University of Melbourne, Parkville, VIC, Australia; Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, VIC, Australia.
| | - Morgan H James
- Department of Psychiatry, Robert Wood Johnson Medical School, Rutgers University, NJ, USA; Brain Health Institute, Rutgers University, NJ, USA.
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Templeton TJ, Diarra S, Gilpin NW. Sex differences in cocaine self-administration by Wistar rats after predator odor exposure. ADVANCES IN DRUG AND ALCOHOL RESEARCH 2023; 3:11245. [PMID: 37842228 PMCID: PMC10571484 DOI: 10.3389/adar.2023.11245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/17/2023]
Abstract
Traumatic stress disorders are defined in part by persistent avoidance of trauma-related contexts. Our lab uses a preclinical model of traumatic stress using predator odor (i.e., bobcat urine) in which some but not all rats exhibit persistent avoidance of odor-paired stimuli, similar to what is seen in humans. Bobcat urine exposure increases alcohol consumption in male Avoider rats, but it has not been tested for its effects on intake of other drugs. Here, we tested the effect of bobcat urine exposure on cocaine self-administration in adult male and female Wistar rats. We did not observe any effect of bobcat urine exposure on cocaine self-administration in male or female rats. We observed that (1) female rats with long access (6 hours) to cocaine self-administer more cocaine than long-access males, (2) long-access males and females exhibit escalation of cocaine intake over time, (3) stressed rats gain less weight than unstressed rats following acute predator odor exposure, (4) baseline cocaine self-administration is predictive of subsequent cocaine self-administration. The results of this study may inform future work on predator odor effects on cocaine self-administration.
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Affiliation(s)
- Taylor J Templeton
- Department of Physiology, Louisiana State University Health Sciences Center, New Orleans, LA 70112
| | - Siga Diarra
- Department of Physiology, Louisiana State University Health Sciences Center, New Orleans, LA 70112
| | - Nicholas W Gilpin
- Department of Physiology, Louisiana State University Health Sciences Center, New Orleans, LA 70112
- Neuroscience Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, LA 70112
- Alcohol and Drug Abuse Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, LA 70112
- Southeast Louisiana VA Healthcare System, New Orleans, LA 70119
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6
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Armstrong A, Rosenthal H, Stout N, Richard JM. Reinstatement of Pavlovian responses to alcohol cues by stress. Psychopharmacology (Berl) 2023; 240:531-545. [PMID: 36227353 PMCID: PMC9931652 DOI: 10.1007/s00213-022-06255-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 10/02/2022] [Indexed: 11/29/2022]
Abstract
RATIONALE Stress may contribute to relapse to alcohol use in part by enhancing reactivity to cues previously paired with alcohol. Yet, standard models of stress-induced reinstatement generally use contingent presentations of alcohol-paired cues to reinforce instrumental behaviors, making it difficult to isolate the ability of cues to invigorate alcohol-seeking. OBJECTIVE Here we sought to test the impact of stress on behavioral responses to alcohol-paired cues, using a model of stress-induced reinstatement of Pavlovian conditioned approach, inspired by Nadia Chaudhri's work on context-induced reinstatement. METHODS Long Evans rats were trained to associate one auditory cue with delivery of alcohol or sucrose and an alternative auditory cue with no reward. Following extinction training, rats were exposed to a stressor prior to being re-exposed to the cues under extinction conditions. We assessed the effects of yohimbine, intermittent footshock and olfactory cues paired with social defeat on responses to alcohol-paired cues and the effects of yohimbine on responses to sucrose-paired cues. RESULTS The pharmacological stressor, yohimbine, enhanced alcohol seeking in a Pavlovian setting, but not in a cue-selective manner. Intermittent footshock and social defeat cues did not enhance alcohol seeking in this paradigm. CONCLUSIONS While yohimbine elicited reinstatement of reward-seeking in a Pavlovian setting, these effects may be unrelated to activation of stress systems or to interactions with specific cues.
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Affiliation(s)
- Anne Armstrong
- Department of Psychological and Brain Sciences, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Hailey Rosenthal
- Department of Psychological and Brain Sciences, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Nakura Stout
- Department of Psychological and Brain Sciences, Krieger School of Arts and Sciences, Johns Hopkins University, Baltimore, MD, 21218, USA
| | - Jocelyn M Richard
- Department of Neuroscience, University of Minnesota, Minneapolis, MN, 55415, USA.
- Medical Discovery Team On Addiction, University of Minnesota, Minneapolis, MN, 55415, USA.
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Templeton TJ, Diarra S, Gilpin NW. Sex differences in cocaine self-administration by Wistar rats after predator odor exposure. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.26.530127. [PMID: 36909634 PMCID: PMC10002624 DOI: 10.1101/2023.02.26.530127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/03/2023]
Abstract
Traumatic stress disorders are defined in part by persistent avoidance of trauma-related contexts. Our lab uses a preclinical model of traumatic stress using predator odor (i.e., bobcat urine) in which some but not all rats exhibit persistent avoidance of odor-paired stimuli, similar to what is seen in humans. Bobcat urine exposure increases alcohol consumption in male Avoider rats, but it has not been tested for its effects on intake of other drugs. Here, we tested the effect of bobcat urine exposure on cocaine self-administration in adult male and female Wistar rats. We did not observe any effect of bobcat urine exposure on cocaine self-administration in male or female rats. We observed that (1) female rats with long access (6 hours) to cocaine self-administer more cocaine than long-access males, (2) long-access males and females exhibit escalation of cocaine intake over time, (3) stressed rats gain less weight than unstressed rats following acute predator odor exposure, (4) baseline cocaine self-administration is predictive of subsequent cocaine self-administration. The results of this study may inform future work on predator odor effects on cocaine self-administration.
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8
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Zhang K, Guo YC, Wang XD, Zhu YJ, Pan BX, Deng C, Yuan TF. Lateral septum inputs to nucleus accumbens mediates stress induced suppression of natural reward seeking. Pharmacol Res 2022; 184:106463. [PMID: 36162602 DOI: 10.1016/j.phrs.2022.106463] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2022] [Revised: 08/31/2022] [Accepted: 09/20/2022] [Indexed: 11/27/2022]
Abstract
Stress alters the level of reward evaluation and seeking. However, the neural circuitry mechanisms underlying stress induced effects on natural reward seeking remain unclear. Here we report a septal-accumbens pathway that mediates the effects of acute stress on reward seeking suppression. We first established the sucrose oral self-administration paradigm and measured the effects of acute stress on reward seeking behavior after 21 days of abstinence. Both forced swimming stress and foot shock stress significantly suppressed the natural reward seeking. Among a variety of brain regions, intermediolateral septum (LSi) appear as a strong stress-responsive area containing abundant c-Fos positive cells; chemogenetic inactivation of LSi reinstated the reward seeking behavior. To elucidate the downstream targets receiving LSi projections, we combined pathway-specific retro-labeling and chemogenetic manipulation to confirm the involvement of LSi-nucleus accumbens (NAc) rather than the Ventral tegmental area (VTA) in mediating the observed behavioral responses. In conclusion, the septal-accumbal projection constitute a discrete circuit dictating the stress evoked alterations on reward seeking and may implicate in treatment of stress induced anhedonia.
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Affiliation(s)
- Ke Zhang
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, China; Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Yan-Chen Guo
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Xiao-Dong Wang
- Department of Neurobiology and Department of Psychiatry of Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Ying-Jie Zhu
- Shenzhen Key Lab of Drug Addiction, The Brain Cognition and Brain Disease Institute, Shenzhen Institutes of Advanced Technology, Chinese Academy of Sciences, Shenzhen, China
| | - Bing-Xing Pan
- Institute of Life Sciences, Nanchang University, Nanchang, Jiangxi, China
| | - Cheng Deng
- Jiangsu Key Laboratory for Biodiversity and Biotechnology, College of Life Sciences, Nanjing Normal University, Nanjing, 210023, China; Institutes for Systems Genetics, Frontiers Science Centre for Disease-Related Molecular Network, National Clinical Research Centre for Geriatrics, West China Hospital, Sichuan University, Chengdu, 610212, Sichuan, China.
| | - Ti-Fei Yuan
- Shanghai Key Laboratory of Psychotic Disorders, Shanghai Mental Health Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China; Co-innovation Center of Neuroregeneration, Nantong University, Nantong, Jiangsu, China; Shanghai Key Laboratory of Anesthesiology and Brain Functional Modulation, Translational Research Institute of Brain and Brain-Like Intelligence, Shanghai Fourth People's Hospital Affiliated to Tongji University School of Medicine, Shanghai, China.
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9
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Flores-Ramirez FJ, Matzeu A, Sánchez-Marín L, Martin-Fardon R. Blockade of corticotropin-releasing factor-1 receptors in the infralimbic cortex prevents stress-induced reinstatement of alcohol seeking in male Wistar rats: Evidence of interaction between CRF 1 and orexin receptor signaling. Neuropharmacology 2022; 210:109046. [PMID: 35341789 PMCID: PMC9176217 DOI: 10.1016/j.neuropharm.2022.109046] [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: 10/06/2021] [Revised: 03/11/2022] [Accepted: 03/21/2022] [Indexed: 10/18/2022]
Abstract
Alcohol use dysregulates responsivity to stress, which is mediated by corticotropin-releasing factor (CRF). With repeated cycles of alcohol use, the hypothalamic-pituitary-adrenal axis becomes hyporesponsive, rendering individuals vulnerable to the reinstatement of alcohol-seeking behavior during stressful episodes. Orexin (Orx; also called hypocretin) plays a well-established role in regulating diverse physiological processes, including stress, and interacts with CRF. The infralimbic cortex (IL) is a CRF-rich region. Anatomical evidence suggests that CRF and Orx interact in this area. To test the behavioral implication of CRF and Orx transmission in the IL during the stress-induced reinstatement of alcohol-seeking behavior, male Wistar rats were trained to self-administer 10% alcohol for 3 weeks. The rats then underwent two weeks of extinction training (identical to the alcohol self-administration sessions, but alcohol was withheld). The day after the last extinction session, the rats received a bilateral intra-IL injection of the CRF1 receptor antagonist CP154,526 (0.6 μg/0.5 μl/side), the dual Orx receptor antagonist TCS1102 (15 μg/0.5 μl/side), or their combination and then were tested for the footshock stress-induced reinstatement of alcohol-seeking behavior. CP154,526 significantly prevented reinstatement, but TCS1102 did not produce such an effect. Interestingly, the co-administration of TCS1102 and CP154,526 reversed the effect of CP154,526 alone, and footshock stress induced a significant increase in Crhr1 and Hcrtr2 mRNA expression in the IL. These results demonstrate a functional interaction between Orx receptor and CRF1 receptor signaling and suggest that CRF1 receptor antagonism may ameliorate stress-induced alcohol-seeking behavior.
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Affiliation(s)
| | - Alessandra Matzeu
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - Laura Sánchez-Marín
- Unidad Gestión Clínica de Salud Mental, Instituto de Investigación Biomédica de Málaga, Hospital Regional Universitario de Málaga/Universidad de Málaga, Málaga, Spain
| | - Rémi Martin-Fardon
- Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, USA
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Brown RM, Dayas C, James M, Smith RJ. New directions in modelling dysregulated reward seeking for food and drugs. Neurosci Biobehav Rev 2022; 132:1037-1048. [PMID: 34736883 PMCID: PMC8816817 DOI: 10.1016/j.neubiorev.2021.10.043] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2021] [Revised: 10/08/2021] [Accepted: 10/19/2021] [Indexed: 01/03/2023]
Abstract
Behavioral models are central to behavioral neuroscience. To study the neural mechanisms of maladaptive behaviors (including binge eating and drug addiction), it is essential to develop and utilize appropriate animal models that specifically focus on dysregulated reward seeking. Both food and cocaine are typically consumed in a regulated manner by rodents, motivated by reward and homeostatic mechanisms. However, both food and cocaine seeking can become dysregulated, resulting in binge-like consumption and compulsive patterns of intake. The speakers in this symposium for the 2021 International Behavioral Neuroscience Meeting utilize behavioral models of dysregulated reward-seeking to investigate the neural mechanisms of binge-like consumption, enhanced cue-driven reward seeking, excessive motivation, and continued use despite negative consequences. In this review, we outline examples of maladaptive patterns of intake and explore recent animal models that drive behavior to become dysregulated, including stress exposure and intermittent access to rewards. Lastly, we explore select behavioral and neural mechanisms underlying dysregulated reward-seeking for both food and drugs.
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Affiliation(s)
- Robyn M Brown
- Department of Biochemistry and Pharmacology, University of Melbourne, Parkville, Vic, 3052, Australia.,Florey Institute of Neuroscience and Mental Health, University of Melbourne, Parkville, Vic, 3052, Australia.,Correspondence: Morgan James, Department of Psychiatry, 683 Hoes Ln West, Office 164, Rutgers University, Piscataway, NJ, 08854 USA, Ph: +1 732 235 4767, , Robyn M Brown, Department of Biochemistry and Pharmacology, Medical Building (B181), Level 8, The University of Melbourne, Parkville VIC 3010 Australia, Ph: +61401007008,
| | - Christopher Dayas
- School of Biomedical Sciences & Pharmacy, Faculty of Health, University of Newcastle, Callaghan, NSW, Australia,Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
| | - Morgan James
- Department of Psychiatry, Robert Wood Johnson Medical School, Rutgers University, Piscataway, NJ, 08854, USA,Brain Health Institute, Rutgers University, Piscataway, NJ, 08854, USA,Correspondence: Morgan James, Department of Psychiatry, 683 Hoes Ln West, Office 164, Rutgers University, Piscataway, NJ, 08854 USA, Ph: +1 732 235 4767, , Robyn M Brown, Department of Biochemistry and Pharmacology, Medical Building (B181), Level 8, The University of Melbourne, Parkville VIC 3010 Australia, Ph: +61401007008,
| | - Rachel J Smith
- Department of Psychological & Brain Sciences, Institute for Neuroscience, Texas A&M University, College Station, TX, 77843, USA
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11
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Fredriksson I, Tsai PJ, Shekara A, Duan Y, Applebey SV, Lu H, Bossert JM, Shaham Y, Yang Y. Orbitofrontal cortex and dorsal striatum functional connectivity predicts incubation of opioid craving after voluntary abstinence. Proc Natl Acad Sci U S A 2021; 118:e2106624118. [PMID: 34675078 PMCID: PMC8639358 DOI: 10.1073/pnas.2106624118] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/30/2021] [Indexed: 12/14/2022] Open
Abstract
We recently introduced a rat model of incubation of opioid craving after voluntary abstinence induced by negative consequences of drug seeking. Here, we used resting-state functional MRI to determine whether longitudinal functional connectivity changes in orbitofrontal cortex (OFC) circuits predict incubation of opioid craving after voluntary abstinence. We trained rats to self-administer for 14 d either intravenous oxycodone or palatable food. After 3 d, we introduced an electric barrier for 12 d that caused cessation of reward self-administration. We tested the rats for oxycodone or food seeking under extinction conditions immediately after self-administration training (early abstinence) and after electric barrier exposure (late abstinence). We imaged their brains before self-administration and during early and late abstinence. We analyzed changes in OFC functional connectivity induced by reward self-administration and electric barrier-induced abstinence. Oxycodone seeking was greater during late than early abstinence (incubation of oxycodone craving). Oxycodone self-administration experience increased OFC functional connectivity with dorsal striatum and related circuits that was positively correlated with incubated oxycodone seeking. In contrast, electric barrier-induced abstinence decreased OFC functional connectivity with dorsal striatum and related circuits that was negatively correlated with incubated oxycodone seeking. Food seeking was greater during early than late abstinence (abatement of food craving). Food self-administration experience and electric barrier-induced abstinence decreased or maintained functional connectivity in these circuits that were not correlated with abated food seeking. Opposing functional connectivity changes in OFC with dorsal striatum and related circuits induced by opioid self-administration versus voluntary abstinence predicted individual differences in incubation of opioid craving.
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Affiliation(s)
- Ida Fredriksson
- Behavioral Neuroscience Branch, Intramural Research Program/National Institute on Drug Abuse/NIH, Baltimore, MD 21224
- Center for Social and Affective Neuroscience, Linköping University, Linköping 581 83, Sweden
| | - Pei-Jung Tsai
- Neuroimaging Research Branch, Intramural Research Program/National Institute on Drug Abuse/NIH, Baltimore, MD 21224
| | - Aniruddha Shekara
- Behavioral Neuroscience Branch, Intramural Research Program/National Institute on Drug Abuse/NIH, Baltimore, MD 21224
| | - Ying Duan
- Neuroimaging Research Branch, Intramural Research Program/National Institute on Drug Abuse/NIH, Baltimore, MD 21224
| | - Sarah V Applebey
- Behavioral Neuroscience Branch, Intramural Research Program/National Institute on Drug Abuse/NIH, Baltimore, MD 21224
| | - Hanbing Lu
- Neuroimaging Research Branch, Intramural Research Program/National Institute on Drug Abuse/NIH, Baltimore, MD 21224
| | - Jennifer M Bossert
- Behavioral Neuroscience Branch, Intramural Research Program/National Institute on Drug Abuse/NIH, Baltimore, MD 21224
| | - Yavin Shaham
- Behavioral Neuroscience Branch, Intramural Research Program/National Institute on Drug Abuse/NIH, Baltimore, MD 21224;
| | - Yihong Yang
- Neuroimaging Research Branch, Intramural Research Program/National Institute on Drug Abuse/NIH, Baltimore, MD 21224
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12
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Guzman AS, Avalos MP, De Giovanni LN, Euliarte PV, Sanchez MA, Mongi-Bragato B, Rigoni D, Bollati FA, Virgolini MB, Cancela LM. CB1R activation in nucleus accumbens core promotes stress-induced reinstatement of cocaine seeking by elevating extracellular glutamate in a drug-paired context. Sci Rep 2021; 11:12964. [PMID: 34155271 PMCID: PMC8217548 DOI: 10.1038/s41598-021-92389-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2021] [Accepted: 05/31/2021] [Indexed: 02/08/2023] Open
Abstract
Preclinical models of stress-induced relapse to drug use have shown that the dysregulation of glutamatergic transmission within the nucleus accumbens (NA) contributes notably to the reinstatement of cocaine-seeking behavior in rodents. In this sense, there has been increasing interest in the cannabinoid type-1 receptor (CB1R), due to its crucial role in modulating glutamatergic neurotransmission within brain areas involved in drug-related behaviors. This study explored the involvement of CB1R within the NA subregions in the restraint stress-induced reinstatement of cocaine-conditioned place preference (CPP), as well as in the regulation of glutamatergic transmission, by using a pharmacological approach and the in vivo microdialysis sampling technique in freely moving rats. CB1R blockade by the antagonist/inverse agonist AM251 (5 nmol/0.5 μl/side) or CB1R activation by the agonist ACEA (0.01 fmol/0.5 μl/side), prevented or potentiated restraint stress-induced reinstatement of cocaine-CPP, respectively, after local administration into NAcore, but not NAshell. In addition, microdialysis experiments demonstrated that restraint stress elicited a significant increase in extracellular glutamate in NAcore under reinstatement conditions, with the local administration of AM251 or ACEA inhibiting or potentiating this, respectively. Interestingly, this rise specifically corresponded to the cocaine-associated CPP compartment. We also showed that this context-dependent change in glutamate paralleled the expression of cocaine-CPP, and disappeared after the extinction of this response. Taken together, these findings demonstrated the key role played by CB1R in mediating reinstatement of cocaine-CPP after restraint stress, through modulation of the context-specific glutamate release within NAcore. Additionally, CB1R regulation of basal extracellular glutamate was demonstrated and proposed as the underlying mechanism.
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Affiliation(s)
- Andrea S Guzman
- Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA, Córdoba, Argentina.,Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), X5000HUA, Córdoba, Argentina
| | - Maria P Avalos
- Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA, Córdoba, Argentina.,Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), X5000HUA, Córdoba, Argentina
| | - Laura N De Giovanni
- Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), X5000HUA, Córdoba, Argentina
| | - Pia V Euliarte
- Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), X5000HUA, Córdoba, Argentina
| | - Marianela A Sanchez
- Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA, Córdoba, Argentina.,Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), X5000HUA, Córdoba, Argentina
| | - Bethania Mongi-Bragato
- Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA, Córdoba, Argentina.,Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), X5000HUA, Córdoba, Argentina
| | - Daiana Rigoni
- Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA, Córdoba, Argentina.,Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), X5000HUA, Córdoba, Argentina
| | - Flavia A Bollati
- Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA, Córdoba, Argentina.,Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), X5000HUA, Córdoba, Argentina
| | - Miriam B Virgolini
- Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA, Córdoba, Argentina.,Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), X5000HUA, Córdoba, Argentina
| | - Liliana M Cancela
- Departamento de Farmacología, Facultad de Ciencias Químicas, Universidad Nacional de Córdoba, X5000HUA, Córdoba, Argentina. .,Instituto de Farmacología Experimental de Córdoba (IFEC-CONICET), X5000HUA, Córdoba, Argentina.
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13
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Bouton ME, Maren S, McNally GP. BEHAVIORAL AND NEUROBIOLOGICAL MECHANISMS OF PAVLOVIAN AND INSTRUMENTAL EXTINCTION LEARNING. Physiol Rev 2021; 101:611-681. [PMID: 32970967 PMCID: PMC8428921 DOI: 10.1152/physrev.00016.2020] [Citation(s) in RCA: 133] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
This article reviews the behavioral neuroscience of extinction, the phenomenon in which a behavior that has been acquired through Pavlovian or instrumental (operant) learning decreases in strength when the outcome that reinforced it is removed. Behavioral research indicates that neither Pavlovian nor operant extinction depends substantially on erasure of the original learning but instead depends on new inhibitory learning that is primarily expressed in the context in which it is learned, as exemplified by the renewal effect. Although the nature of the inhibition may differ in Pavlovian and operant extinction, in either case the decline in responding may depend on both generalization decrement and the correction of prediction error. At the neural level, Pavlovian extinction requires a tripartite neural circuit involving the amygdala, prefrontal cortex, and hippocampus. Synaptic plasticity in the amygdala is essential for extinction learning, and prefrontal cortical inhibition of amygdala neurons encoding fear memories is involved in extinction retrieval. Hippocampal-prefrontal circuits mediate fear relapse phenomena, including renewal. Instrumental extinction involves distinct ensembles in corticostriatal, striatopallidal, and striatohypothalamic circuits as well as their thalamic returns for inhibitory (extinction) and excitatory (renewal and other relapse phenomena) control over operant responding. The field has made significant progress in recent decades, although a fully integrated biobehavioral understanding still awaits.
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Affiliation(s)
- Mark E Bouton
- Department of Psychological Science, University of Vermont, Burlington, Vermont
| | - Stephen Maren
- Department of Psychological and Brain Sciences and Institute for Neuroscience, Texas A&M University, College Station, Texas
| | - Gavan P McNally
- School of Psychology, University of New South Wales, Sydney, Australia
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14
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Caccamise A, Van Newenhizen E, Mantsch JR. Neurochemical mechanisms and neurocircuitry underlying the contribution of stress to cocaine seeking. J Neurochem 2021; 157:1697-1713. [PMID: 33660857 DOI: 10.1111/jnc.15340] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2021] [Revised: 02/26/2021] [Accepted: 02/28/2021] [Indexed: 12/12/2022]
Abstract
In individuals with substance use disorders, stress is a critical determinant of relapse susceptibility. In some cases, stressors directly trigger cocaine use. In others, stressors interact with other stimuli to promote drug seeking, thereby setting the stage for relapse. Here, we review the mechanisms and neurocircuitry that mediate stress-triggered and stress-potentiated cocaine seeking. Stressors trigger cocaine seeking by activating noradrenergic projections originating in the lateral tegmentum that innervate the bed nucleus of the stria terminalis to produce beta adrenergic receptor-dependent regulation of neurons that release corticotropin releasing factor (CRF) into the ventral tegmental area (VTA). CRF promotes the activation of VTA dopamine neurons that innervate the prelimbic prefrontal cortex resulting in D1 receptor-dependent excitation of a pathway to the nucleus accumbens core that mediates cocaine seeking. The stage-setting effects of stress require glucocorticoids, which exert rapid non-canonical effects at several sites within the mesocorticolimbic system. In the nucleus accumbens, corticosterone attenuates dopamine clearance via the organic cation transporter 3 to promote dopamine signaling. In the prelimbic cortex, corticosterone mobilizes the endocannabinoid, 2-arachidonoylglycerol (2-AG), which produces CB1 receptor-dependent reductions in inhibitory transmission, thereby increasing excitability of neurons which comprise output pathways responsible for cocaine seeking. Factors that influence the role of stress in cocaine seeking, including prior history of drug use, biological sex, chronic stress/co-morbid stress-related disorders, adolescence, social variables, and genetics are discussed. Better understanding when and how stress contributes to drug seeking should guide the development of more effective interventions, particularly for those whose drug use is stress related.
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Affiliation(s)
- Aaron Caccamise
- Graduate Program in Neuroscience, Marquette University, Milwaukee, WI, USA
| | - Erik Van Newenhizen
- Department of Pharmacology & Toxicology, Medical College of Wisconsin, Milwaukee, WI, USA
| | - John R Mantsch
- Department of Pharmacology & Toxicology, Medical College of Wisconsin, Milwaukee, WI, USA
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15
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Fischer KD, Knackstedt LA, Rosenberg PA. Glutamate homeostasis and dopamine signaling: Implications for psychostimulant addiction behavior. Neurochem Int 2021; 144:104896. [PMID: 33159978 PMCID: PMC8489281 DOI: 10.1016/j.neuint.2020.104896] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2020] [Revised: 10/30/2020] [Accepted: 10/31/2020] [Indexed: 02/06/2023]
Abstract
Cocaine, amphetamine, and methamphetamine abuse disorders are serious worldwide health problems. To date, there are no FDA-approved medications for the treatment of these disorders. Elucidation of the biochemical underpinnings contributing to psychostimulant addiction is critical for the development of effective therapies. Excitatory signaling and glutamate homeostasis are well known pathophysiological substrates underlying addiction-related behaviors spanning multiple types of psychostimulants. To alleviate relapse behavior to psychostimulants, considerable interest has focused on GLT-1, the major glutamate transporter in the brain. While many brain regions are implicated in addiction behavior, this review focuses on two regions well known for their role in mediating the effects of cocaine and amphetamines, namely the nucleus accumbens (NAc) and the ventral tegmental area (VTA). In addition, because many investigators have utilized Cre-driver lines to selectively control gene expression in defined cell populations relevant for psychostimulant addiction, we discuss potential off-target effects of Cre-recombinase that should be considered in the design and interpretation of such experiments.
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Affiliation(s)
- Kathryn D Fischer
- Department of Pharmacology and Toxicology, Indiana University School of Medicine, Indianapolis, IN, 46202, USA.
| | - Lori A Knackstedt
- Psychology Department, University of Florida, Gainesville, FL, 32611, USA
| | - Paul A Rosenberg
- Department of Neurology, F.M. Kirby Neurobiology Center, Boston Children's Hospital, Boston, MA, 02115, USA; Program in Neuroscience, Harvard Medical School, Boston, MA, 02115, USA.
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16
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Liu Y, McNally GP. Dopamine and relapse to drug seeking. J Neurochem 2021; 157:1572-1584. [PMID: 33486769 DOI: 10.1111/jnc.15309] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2020] [Revised: 01/04/2021] [Accepted: 01/13/2021] [Indexed: 12/29/2022]
Abstract
The actions of dopamine are essential to relapse to drug seeking but we still lack a precise understanding of how dopamine achieves these effects. Here we review recent advances from animal models in understanding how dopamine controls relapse to drug seeking. These advances have been enabled by important developments in understanding the basic neurochemical, molecular, anatomical, physiological and functional properties of the major dopamine pathways in the mammalian brain. The literature shows that although different forms of relapse to seeking different drugs of abuse each depend on dopamine, there are distinct dopamine mechanisms for relapse. Different circuit-level mechanisms, different populations of dopamine neurons and different activity profiles within these dopamine neurons, are important for driving different forms of relapse. This diversity highlights the need to better understand when, where and how dopamine contributes to relapse behaviours.
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Affiliation(s)
- Yu Liu
- School of Psychology, UNSW Sydney, Sydney, NSW, Australia
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17
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Relapse to cocaine use persists following extinction of drug-primed craving. Neuropharmacology 2019; 155:185-193. [DOI: 10.1016/j.neuropharm.2019.05.036] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Revised: 05/06/2019] [Accepted: 05/30/2019] [Indexed: 11/17/2022]
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18
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Der-Ghazarian TS, Charmchi D, Noudali SN, Scott SN, Holter MC, Newbern JM, Neisewander JL. Neural Circuits Associated with 5-HT 1B Receptor Agonist Inhibition of Methamphetamine Seeking in the Conditioned Place Preference Model. ACS Chem Neurosci 2019; 10:3271-3283. [PMID: 31042352 DOI: 10.1021/acschemneuro.8b00709] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
5-HT1B receptors (5-HT1BRs) modulate psychostimulant reward and incentive motivation in rodents. Here we investigated the effects of the 5-HT1BR agonist CP94253 (10 mg/kg, IP) on the acquisition and expression of methamphetamine (Meth) conditioned place preference (CPP) in C57BL/6 male mice. We subsequently examined the potential brain regions involved in CP94253 effects using FOS as a marker of neural activity. In the acquisition experiment, mice received the agonist 30 min before each of the Meth injections given during conditioning. In the expression experiment, mice that had acquired Meth-CPP were given either saline or CP94253 and were tested for CPP 30 min later. We found that CP94253 attenuated the expression of Meth-CPP, but had no effect on acquisition. Mice expressing Meth-CPP had elevated numbers of FOS+ cells in the ventral tegmental area (VTA) and basolateral amygdala (BlA) and reduced FOS+ cells in the central amygdala (CeA) compared to saline controls. CP94253 given before the expression test, but not acutely in drug-naive mice, enhanced FOS+ cells in the VTA, the nucleus accumbens (NAc) shell and core, and the dorsomedial striatum and reversed the Meth-conditioned changes in FOS in the BlA and CeA. Approximately 50-70% of FOS+ cells in the NAc and VTA were GABAergic regardless of group. By contrast, we did not observe FOS-labeling in dopamine neurons in the VTA. The findings suggest that CP94253 attenuates the motivational effects of the Meth-associated environment and highlight the amygdala, VTA, NAc, and dorsomedial striatum as potential regions involved in this effect.
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Affiliation(s)
| | - Delaram Charmchi
- School of Life Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Sean N. Noudali
- School of Life Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Samantha N. Scott
- School of Life Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Michael C. Holter
- School of Life Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Jason M. Newbern
- School of Life Sciences, Arizona State University, Tempe, Arizona 85287, United States
| | - Janet L. Neisewander
- School of Life Sciences, Arizona State University, Tempe, Arizona 85287, United States
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19
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Early life stress and the propensity to develop addictive behaviors. Int J Dev Neurosci 2019; 78:156-169. [PMID: 31255718 DOI: 10.1016/j.ijdevneu.2019.06.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 06/03/2019] [Accepted: 06/13/2019] [Indexed: 12/14/2022] Open
Abstract
There is a vast literature on effects of early life manipulations in rodents much of which is aimed at investigating the long-term consequences related to emotion and cognition in adulthood. Less is known about how these manipulations affect responses reflective of alcohol (AUD) and substance (SUD) use disorders. The purpose of this paper is to review the literature of studies that employed early life manipulations and assessed behavioral responses to psychoactive substances, specifically alcohol, opiates, and stimulants, in rodents. While the findings with alcohol are more limited and mixed, studies with opiates and stimulants show strong support for the ability of these manipulations to enhance behavioral responsivity to these substances in line with epidemiological data. Some outcomes show sex differences. The mechanisms that influence these enduring changes may reflect epigenetic alterations. Several studies support a role for altered DNA methylation (and other epigenetic mechanisms) as biological responses to early environmental insults. The chemical changes induced by DNA methylation affect transcriptional activity of DNA and thus can have a long-term impact on the individual's phenotype. Such effects are particularly robust when they occur during sensitive periods of brain development (e.g., first postnatal weeks in rodents). We review this emerging literature as it relates to the known neurobiology of AUDs and SUDs and suggest new avenues of research. Such findings will have implications for the treatment and prevention of AUDs and SUDs and could provide insight into factors that support resiliency.
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20
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Bouton ME. Extinction of instrumental (operant) learning: interference, varieties of context, and mechanisms of contextual control. Psychopharmacology (Berl) 2019; 236:7-19. [PMID: 30350221 PMCID: PMC6374202 DOI: 10.1007/s00213-018-5076-4] [Citation(s) in RCA: 68] [Impact Index Per Article: 13.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 10/10/2018] [Indexed: 12/16/2022]
Abstract
This article reviews recent research on the extinction of instrumental (or operant) conditioning from the perspective that it is an example of a general retroactive interference process. Previous discussions of interference have focused primarily on findings from Pavlovian conditioning. The present review shows that extinction in instrumental learning has much in common with other examples of retroactive interference in instrumental learning (e.g., omission learning, punishment, second-outcome learning, discrimination reversal learning, and differential reinforcement of alternative behavior). In each, the original learning can be largely retained after conflicting information is learned, and behavior is cued or controlled by the current context. The review also suggests that a variety of stimuli can play the role of context, including room and apparatus cues, temporal cues, drug state, deprivation state, stress state, and recent reinforcers, discrete cues, or behaviors. In instrumental learning situations, the context can control behavior through its direct association with the reinforcer or punisher, through its hierarchical relation with response-outcome associations, or its direct association (inhibitory or excitatory) with the response. In simple instrumental extinction and habit learning, the latter mechanism may play an especially important role.
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21
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Greenwald MK. Anti-stress neuropharmacological mechanisms and targets for addiction treatment: A translational framework. Neurobiol Stress 2018; 9:84-104. [PMID: 30238023 PMCID: PMC6138948 DOI: 10.1016/j.ynstr.2018.08.003] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 07/30/2018] [Accepted: 08/10/2018] [Indexed: 12/18/2022] Open
Abstract
Stress-related substance use is a major challenge for treating substance use disorders. This selective review focuses on emerging pharmacotherapies with potential for reducing stress-potentiated seeking and consumption of nicotine, alcohol, marijuana, cocaine, and opioids (i.e., key phenotypes for the most commonly abused substances). I evaluate neuropharmacological mechanisms in experimental models of drug-maintenance and relapse, which translate more readily to individuals presenting for treatment (who have initiated and progressed). An affective/motivational systems model (three dimensions: valence, arousal, control) is mapped onto a systems biology of addiction approach for addressing this problem. Based on quality of evidence to date, promising first-tier neurochemical receptor targets include: noradrenergic (α1 and β antagonist, α2 agonist), kappa-opioid antagonist, nociceptin antagonist, orexin-1 antagonist, and endocannabinoid modulation (e.g., cannabidiol, FAAH inhibition); second-tier candidates may include corticotropin releasing factor-1 antagonists, serotonergic agents (e.g., 5-HT reuptake inhibitors, 5-HT3 antagonists), glutamatergic agents (e.g., mGluR2/3 agonist/positive allosteric modulator, mGluR5 antagonist/negative allosteric modulator), GABA-promoters (e.g., pregabalin, tiagabine), vasopressin 1b antagonist, NK-1 antagonist, and PPAR-γ agonist (e.g., pioglitazone). To address affective/motivational mechanisms of stress-related substance use, it may be advisable to combine agents with actions at complementary targets for greater efficacy but systematic studies are lacking except for interactions with the noradrenergic system. I note clinically-relevant factors that could mediate/moderate the efficacy of anti-stress therapeutics and identify research gaps that should be pursued. Finally, progress in developing anti-stress medications will depend on use of reliable CNS biomarkers to validate exposure-response relationships.
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Affiliation(s)
- Mark K. Greenwald
- Department of Psychiatry and Behavioral Neurosciences, School of Medicine, Department of Pharmacy Practice, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, MI, 48201, USA
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22
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Schepers ST, Bouton ME. Stress as a context: Stress causes relapse of inhibited food seeking if it has been associated with prior food seeking. Appetite 2018; 132:131-138. [PMID: 30316872 DOI: 10.1016/j.appet.2018.10.016] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 08/27/2018] [Accepted: 10/10/2018] [Indexed: 12/12/2022]
Abstract
Three experiments with rats explored the hypothesis that inhibited food-seeking can be reinstated by stress if stress has been part of the context of earlier food-seeking. In all experiments, rats first learned to lever press for sucrose pellets and then had the response inhibited through extinction (where responding no longer yielded sucrose pellets). In a final test, inhibited responding was tested after exposure to a stressor or not. Previous research indicates that stress during testing does not normally reinstate extinguished food-seeking, although it reliably does so when animals are responding for drugs. In Experiment 1, stress caused a reinstatement of food seeking if and only if the rats had been exposed to stressors prior to sessions of lever press training. In Experiment 2, a new stressor that had not been associated with response acquisition also caused reinstatement if other stressors had been associated with response acquisition. Experiment 3 then established that stressors must be associated with the acquisition of lever pressing, rather than extinction, in order to allow a stressor to cause relapse of extinguished food seeking. The results support the view that stress can cause relapse of inhibited food seeking if it has been part of the context of original food seeking. The effect is therefore an example of the ABA renewal effect in which inhibited responding recovers after extinction when the response is returned to its training context. Implications for understanding relapse to overeating and other "addictive" behaviors are discussed.
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23
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Montagud-Romero S, Blanco-Gandía MC, Reguilón MD, Ferrer-Pérez C, Ballestín R, Miñarro J, Rodríguez-Arias M. Social defeat stress: Mechanisms underlying the increase in rewarding effects of drugs of abuse. Eur J Neurosci 2018; 48:2948-2970. [PMID: 30144331 DOI: 10.1111/ejn.14127] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 06/11/2018] [Accepted: 08/14/2018] [Indexed: 12/27/2022]
Abstract
Social interaction is known to be the main source of stress in human beings, which explains the translational importance of this research in animals. Evidence reported over the last decade has revealed that, when exposed to social defeat experiences (brief episodes of social confrontations during adolescence and adulthood), the rodent brain undergoes remodeling and functional modifications, which in turn lead to an increase in the rewarding and reinstating effects of different drugs of abuse. The mechanisms by which social stress cause changes in the brain and behavior are unknown, and so the objective of this review is to contemplate how social defeat stress induces long-lasting consequences that modify the reward system. First of all, we will describe the most characteristic results of the short- and long-term consequences of social defeat stress on the rewarding effects of drugs of abuse such as psychostimulants and alcohol. Secondly, and throughout the review, we will carefully assess the neurobiological mechanisms underlying these effects, including changes in the dopaminergic system, corticotrophin releasing factor signaling, epigenetic modifications and the neuroinflammatory response. To conclude, we will consider the advantages and disadvantages and the translational value of the social defeat stress model, and will discuss challenges and future directions.
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Affiliation(s)
- Sandra Montagud-Romero
- Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Valencia, Spain
| | | | - Marina D Reguilón
- Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Valencia, Spain
| | - Carmen Ferrer-Pérez
- Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Valencia, Spain
| | - Raul Ballestín
- Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Valencia, Spain
| | - Jose Miñarro
- Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Valencia, Spain
| | - Marta Rodríguez-Arias
- Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Valencia, Spain
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24
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Leonard MZ, DeBold JF, Miczek KA. Escalated cocaine "binges" in rats: enduring effects of social defeat stress or intra-VTA CRF. Psychopharmacology (Berl) 2017; 234:2823-2836. [PMID: 28725939 PMCID: PMC5709163 DOI: 10.1007/s00213-017-4677-7] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Accepted: 06/16/2017] [Indexed: 12/16/2022]
Abstract
RATIONALE Exposure to intermittent social defeat stress elicits corticotropin releasing factor (CRF) release into the VTA and induces long-term modulation of mesocorticolimbic dopamine activity in rats. These adaptations are associated with an intense cocaine-taking phenotype, which is prevented by CRF receptor antagonists. OBJECTIVE The present studies examine whether infusion of CRF into the VTA is sufficient to escalate cocaine-taking behavior, in the absence of social defeat experience. Additionally, we aimed to characterize changes in cocaine valuation that may promote binge-like cocaine intake. METHODS Male Long-Evans rats were microinjected into the VTA with CRF (50 or 500 ng/side), vehicle, or subjected to social defeat stress, intermittently over 10 days. Animals were then trained to self-administer IV cocaine (FR5). Economic demand for cocaine was evaluated using a within-session behavioral-economics threshold procedure, which was followed by a 24-h extended access "binge." RESULTS Rats that experienced social defeat or received intra-VTA CRF microinfusions (50 ng) both took significantly more cocaine than controls over the 24-h binge but showed distinct patterns of intake. Behavioral economic analysis revealed that individual demand for cocaine strongly predicts binge-like consumption, and demand elasticity (i.e. α) is augmented by intra-VTA CRF, but not by social defeat. The effects of CRF on cocaine-taking were also prevented by intra-VTA pretreatment with CP376395, but not Astressin-2B. CONCLUSIONS Repeated infusion of CRF into the VTA persistently alters cocaine valuation and intensifies binge-like drug intake in a CRF-R1-dependent manner. Conversely, the persistent pattern of cocaine bingeing induced by social defeat stress may suggest impaired inhibitory control, independent of reward valuation.
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Affiliation(s)
| | - Joseph F DeBold
- Department of Psychology, Tufts University, Medford, MA, USA
| | - Klaus A Miczek
- Department of Psychology, Tufts University, Medford, MA, USA.
- Department of Neuroscience, Tufts University, Boston, MA, USA.
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25
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Garcia R, Cotter AR, Leslie K, Olive MF, Neisewander JL. Preclinical Evidence That 5-HT1B Receptor Agonists Show Promise as Medications for Psychostimulant Use Disorders. Int J Neuropsychopharmacol 2017; 20:644-653. [PMID: 28444326 PMCID: PMC5570061 DOI: 10.1093/ijnp/pyx025] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2016] [Accepted: 04/18/2017] [Indexed: 11/30/2022] Open
Abstract
BACKGROUND 5-HT1B receptor agonists enhance cocaine intake during daily self-administration sessions but decrease cocaine intake when tested after prolonged abstinence. We examined if 5-HT1B receptor agonists produce similar abstinence-dependent effects on methamphetamine intake. METHODS Male rats were trained to self-administer methamphetamine (0.1 mg/kg, i.v.) on low (fixed ratio 5 and variable ratio 5) and high (progressive ratio) effort schedules of reinforcement until intake was stable. Rats were then tested for the effects of the selective 5-HT1B receptor agonist, CP 94,253 (5.6 or 10 mg/kg), or the less selective but clinically available 5-HT1B/1D receptor agonist, zolmitriptan (10 mg/kg), on methamphetamine self-administration both before and after a 21-day forced abstinence period during which the rats remained in their home cages. RESULTS The inverted U-shaped, methamphetamine dose-response function for intake on the fixed ratio 5 schedule was shifted downward by CP 94,253 both before and after abstinence. The CP 94,253-induced decrease in methamphetamine intake was replicated in rats tested on a variable ratio 5 schedule, and the 5-HT1B receptor antagonist SB 224,289 (10 mg/kg) reversed this effect. CP 94,253 also attenuated methamphetamine intake on a progressive ratio schedule both pre- and postabstinence. Similarly, zolmitriptan attenuated methamphetamine intake on a variable ratio 5 schedule both pre- and postabstinence, and the latter effect was sustained after each of 2 more treatments given every 2 to 3 days prior to daily sessions. CONCLUSIONS Unlike the abstinence-dependent effect of 5-HT1B receptor agonists on cocaine intake reported previously, both CP 94,253 and zolmitriptan decreased methamphetamine intake regardless of abstinence. These findings suggest that 5-HT1B receptor agonists may have clinical efficacy for psychostimulant use disorders.
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Affiliation(s)
- Raul Garcia
- School of Life Sciences (Mr Garcia, Mr Cotter, Mr Leslie, and Dr Neisewander), and Psychology Department (Dr Olive), Arizona State University, Tempe, Arizona
| | - Austin R Cotter
- School of Life Sciences (Mr Garcia, Mr Cotter, Mr Leslie, and Dr Neisewander), and Psychology Department (Dr Olive), Arizona State University, Tempe, Arizona
| | - Kenneth Leslie
- School of Life Sciences (Mr Garcia, Mr Cotter, Mr Leslie, and Dr Neisewander), and Psychology Department (Dr Olive), Arizona State University, Tempe, Arizona
| | - M Foster Olive
- School of Life Sciences (Mr Garcia, Mr Cotter, Mr Leslie, and Dr Neisewander), and Psychology Department (Dr Olive), Arizona State University, Tempe, Arizona
| | - Janet L Neisewander
- School of Life Sciences (Mr Garcia, Mr Cotter, Mr Leslie, and Dr Neisewander), and Psychology Department (Dr Olive), Arizona State University, Tempe, Arizona
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Markus CR, Rogers PJ, Brouns F, Schepers R. Eating dependence and weight gain; no human evidence for a 'sugar-addiction' model of overweight. Appetite 2017; 114:64-72. [PMID: 28330706 DOI: 10.1016/j.appet.2017.03.024] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2016] [Revised: 01/05/2017] [Accepted: 03/15/2017] [Indexed: 01/05/2023]
Abstract
BACKGROUND AND AIMS There is an increasing societal concern that consumption of specific foods such as sugar might become 'addictive' and, hence, promote weight gain. Claims about the addictiveness of sugar however are based largely on findings from few animal studies, whereas there is a lack of direct human evidence for symptoms of sugar-related substance dependence. The current study examined in a large sample of human participants whether foods mainly containing sugar in particular might cause 'addiction-like' problems that meet clinical DSM criteria for substance dependence, and, also whether in turn this relates to body weight and negative affectivity (depressed mood). METHODS In a cross-sectional study, n = 1495 university students from a variety of faculties were assessed for DSM-related signs of food addiction for particular food categories (YFAS), and, also BMI and negative affectivity. RESULTS Results revealed that from the total sample, 95% experienced at least one symptom of food dependence and 12.6% met the YFAS classification for 'food addiction' as related to DSM-IV criteria. The majority of respondents experienced these problems for combined high-fat savoury (30%) and high-fat sweet (25%) foods, whereas only a minority experienced such problems for low-fat/savoury (2%) and mainly sugar-containing foods (5%). Overweight correlated only with addictive-like problems for high-fat savoury and high-fat sweet foods (P < 0.0001), while this was not found for foods mainly containing sugar. CONCLUSION The current findings indicate that sugary foods contribute minimally to 'food dependence' and increased risk of weight gain. Instead, they are consistent with the current scientific notion that food energy density, and the unique individual experience of eating, plays an important role in determining the reward value of food and promoting excessive energy intake.
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Affiliation(s)
- C Rob Markus
- Faculty of Psychology and Neuroscience; Dept of Neuropsychology & Psychopharmacology; Maastricht University, Maastricht, The Netherlands.
| | - Peter J Rogers
- Nutrition and Behaviour Unit, School of Experimental Psychology, University of Bristol, Bristol, UK
| | - Fred Brouns
- Human Biology, Faculty of Health Medicine and Life Sciences, University Maastricht; Maastricht, The Netherlands
| | - Robbie Schepers
- Faculty of Psychology and Neuroscience; Dept of Neuropsychology & Psychopharmacology; Maastricht University, Maastricht, The Netherlands
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Reward loss and addiction: Opportunities for cross-pollination. Pharmacol Biochem Behav 2017; 154:39-52. [DOI: 10.1016/j.pbb.2017.02.001] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2016] [Revised: 02/01/2017] [Accepted: 02/03/2017] [Indexed: 12/20/2022]
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Packard AEB, Egan AE, Ulrich-Lai YM. HPA Axis Interactions with Behavioral Systems. Compr Physiol 2016; 6:1897-1934. [PMID: 27783863 DOI: 10.1002/cphy.c150042] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Perhaps the most salient behaviors that individuals engage in involve the avoidance of aversive experiences and the pursuit of pleasurable experiences. Engagement in these behaviors is regulated to a significant extent by an individual's hormonal milieu. For example, glucocorticoid hormones are produced by the hypothalamic-pituitary-adrenocortical (HPA) axis, and influence most aspects of behavior. In turn, many behaviors can influence HPA axis activity. These bidirectional interactions not only coordinate an individual's physiological and behavioral states to each other, but can also tune them to environmental conditions thereby optimizing survival. The present review details the influence of the HPA axis on many types of behavior, including appetitively-motivated behaviors (e.g., food intake and drug use), aversively-motivated behaviors (e.g., anxiety-related and depressive-like) and cognitive behaviors (e.g., learning and memory). Conversely, the manuscript also describes how engaging in various behaviors influences HPA axis activity. Our current understanding of the neuronal and/or hormonal mechanisms that underlie these interactions is also summarized. © 2016 American Physiological Society. Compr Physiol 6:1897-1934, 2016.
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Affiliation(s)
- Amy E B Packard
- Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, Cincinnati, Ohio, USA
| | - Ann E Egan
- Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, Cincinnati, Ohio, USA
| | - Yvonne M Ulrich-Lai
- Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, Cincinnati, Ohio, USA
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NMDA antagonist MK 801 in nucleus accumbens core but not shell disrupts the restraint stress-induced reinstatement of extinguished cocaine-conditioned place preference in rats. Behav Brain Res 2016; 315:150-9. [PMID: 27506656 DOI: 10.1016/j.bbr.2016.08.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2015] [Revised: 08/04/2016] [Accepted: 08/05/2016] [Indexed: 12/27/2022]
Abstract
Relapse is a common feature of cocaine addiction. In rodents, it can be elicited by cues, stress or the drug. Restraint stress-induced reinstatement of cocaine-conditioned place preference (CPP) is a useful model to study the mechanisms involved in stress-induced relapse of drug-seeking behavior. There is evidence that the glutamate NMDA receptors are critically involved in drug- and cue-induced reinstatement of seeking behavior and drug-CPP responses. The aim of this study was to investigate the contribution of NMDA receptors within core vs. shell nucleus accumbens (NAc) subregions to restraint stress-induced reinstatement of extinguished cocaine-CPP. After extinction of cocaine-conditioned preference, animals were administered MK 801 systemically or directly into intra-core or intra-shell, and restrained for 30min or left undisturbed in their home-cages. First, we demonstrated that restraint stress-induced reinstatement of extinguished cocaine-CPP depends on the duration of restraint as well as on the context in which it is applied. Second, this effect was blocked by systemic MK 801 administration either before or after restraint. Third, intra-core but not intra-shell administration abrogated the restraint stress-induced reinstatement. These findings show that NMDA receptors within NAc core, but not shell, play a critical role in restraint stress-induced reinstatement of cocaine-CPP.
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Barker DJ, Simmons SJ, West MO. Ultrasonic Vocalizations as a Measure of Affect in Preclinical Models of Drug Abuse: A Review of Current Findings. Curr Neuropharmacol 2016; 13:193-210. [PMID: 26411762 PMCID: PMC4598431 DOI: 10.2174/1570159x13999150318113642] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
The present review describes ways in which ultrasonic vocalizations (USVs) have been used in studies of substance abuse. Accordingly, studies are reviewed which demonstrate roles for affective processing in response to the presentation of drug-related cues, experimenter- and self-administered drug, drug withdrawal, and during tests of relapse/reinstatement. The review focuses on data collected from studies using cocaine and amphetamine, where a large body of evidence has been collected. Data suggest that USVs capture animals’ initial positive reactions to psychostimulant administration and are capable of identifying individual differences in affective responding. Moreover, USVs have been used to demonstrate that positive affect becomes sensitized to psychostimulants over acute exposure before eventually exhibiting signs of tolerance. In the drug-dependent animal, a mixture of USVs suggesting positive and negative affect is observed, illustrating mixed responses to psychostimulants. This mixture is predominantly characterized by an initial bout of positive affect followed by an opponent negative emotional state, mirroring affective responses observed in human addicts. During drug withdrawal, USVs demonstrate the presence of negative affective withdrawal symptoms. Finally, it has been shown that drug-paired cues produce a learned, positive anticipatory response during training, and that presentation of drug-paired cues following abstinence produces both positive affect and reinstatement behavior. Thus, USVs are a useful tool for obtaining an objective measurement of affective states in animal models of substance abuse and can increase the information extracted from drug administration studies. USVs enable detection of subtle differences in a behavioral response that might otherwise be missed using traditional measures.
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Affiliation(s)
- David J Barker
- National Institute on Drug Abuse, Neuronal Networks Section, 251 Bayview Boulevard, Baltimore, MD 21224.
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Manvich DF, Stowe TA, Godfrey JR, Weinshenker D. A Method for Psychosocial Stress-Induced Reinstatement of Cocaine Seeking in Rats. Biol Psychiatry 2016; 79:940-6. [PMID: 26257242 PMCID: PMC4706515 DOI: 10.1016/j.biopsych.2015.07.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Revised: 06/30/2015] [Accepted: 07/01/2015] [Indexed: 12/15/2022]
Abstract
We describe a novel preclinical model of stress-induced relapse to cocaine use in rats using social defeat stress, an ethologically valid psychosocial stressor in rodents that closely resembles stressors that promote craving and relapse in humans. Rats self-administered cocaine for 20 days. On days 11, 14, 17, and 20, animals were subjected to social defeat stress or a nonstressful control condition following the session, with discrete environmental stimuli signaling the impending event. After extinction training, reinstatement was assessed following re-exposure to these discrete cues. Animals re-exposed to psychosocial stress-predictive cues exhibited increased serum corticosterone and significantly greater reinstatement of cocaine seeking than the control group, and active coping behaviors during social defeat episodes were associated with subsequent reinstatement magnitude. These studies are the first to describe an operant model of psychosocial stress-induced relapse in rodents and lay the foundation for future work investigating its neurobiological underpinnings.
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Affiliation(s)
- Daniel F Manvich
- Department of Human Genetics, Emory University School of Medicine, Atlanta, GA 30322
| | - Taylor A Stowe
- Neuroscience and Behavioral Biology Program, Emory University, Atlanta, GA 30322
| | - Jodi R Godfrey
- Division of Neuropharmacology and Neurologic Diseases and Yerkes Imaging Center, Yerkes National Primate Research Center, Emory University, Atlanta, GA 30322
| | - David Weinshenker
- Department of Human Genetics, Emory University School of Medicine, Emory University, Atlanta, Georgia.
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Wong WC, Marinelli M. Adolescent-onset of cocaine use is associated with heightened stress-induced reinstatement of cocaine seeking. Addict Biol 2016. [PMID: 26202521 DOI: 10.1111/adb.12284] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Adolescent rats take cocaine more readily than adults, are more sensitive to lower doses of the drug and work harder for it. It remains unknown if adolescent-onset of cocaine use has long-term consequences on adult relapse liability. Therefore, we tested if self-administering cocaine during adolescence impacts subsequent stress-induced reinstatement to cocaine seeking and taking, after a prolonged drug-free period. Adolescent (~P42) or adult (P88) rats self-administered cocaine (0.6 or 1.2 mg/kg/infusion) for 7 or 10 days. Then, they underwent a prolonged drug-free period (21-40 days), after which they were tested for reinstatement of cocaine-seeking (i.e. responding in the absence of cocaine) induced by the stress hormone corticosterone, the pharmacological stressor yohimbine or electric footshock. Studies employed either single extinction session (within-session extinction/reinstatement) or repeated extinction prior to reinstatement (between-session extinction/reinstatement). Finally, in a separate set of experiments, rats underwent a prolonged drug-free period (~40 days) and were then allowed to self-administer cocaine again, using progressive-ratio procedures that appraise the reinforcing efficacy of cocaine. Rats with adolescent-onset of cocaine use showed greater stress-induced reinstatement of cocaine seeking than rats with adult-onset of cocaine use. This was observed across conditions, providing external validity to these results. Groups did not differ on drug taking in progressive-ratio tests. Our studies indicate that experiencing cocaine during adolescence renders subjects particularly responsive to the subsequent effects of stress on drug seeking. This heightened propensity for reinstatement puts adolescent-onset drug users at heightened risk for relapse.
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Affiliation(s)
- Wai Chong Wong
- Department of Cellular and Molecular Pharmacology; Chicago Medical School, Rosalind Franklin University of Medicine and Science; North Chicago IL USA
- Department of Dermatology; Brown University; Providence RI USA
| | - Michela Marinelli
- Department of Cellular and Molecular Pharmacology; Chicago Medical School, Rosalind Franklin University of Medicine and Science; North Chicago IL USA
- Division of Pharmacology and Toxicology, College of Pharmacy; The University of Texas at Austin; Austin TX USA
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Mantsch JR, Baker DA, Funk D, Lê AD, Shaham Y. Stress-Induced Reinstatement of Drug Seeking: 20 Years of Progress. Neuropsychopharmacology 2016; 41:335-56. [PMID: 25976297 PMCID: PMC4677117 DOI: 10.1038/npp.2015.142] [Citation(s) in RCA: 306] [Impact Index Per Article: 38.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 05/01/2015] [Accepted: 05/08/2015] [Indexed: 12/24/2022]
Abstract
In human addicts, drug relapse and craving are often provoked by stress. Since 1995, this clinical scenario has been studied using a rat model of stress-induced reinstatement of drug seeking. Here, we first discuss the generality of stress-induced reinstatement to different drugs of abuse, different stressors, and different behavioral procedures. We also discuss neuropharmacological mechanisms, and brain areas and circuits controlling stress-induced reinstatement of drug seeking. We conclude by discussing results from translational human laboratory studies and clinical trials that were inspired by results from rat studies on stress-induced reinstatement. Our main conclusions are (1) The phenomenon of stress-induced reinstatement, first shown with an intermittent footshock stressor in rats trained to self-administer heroin, generalizes to other abused drugs, including cocaine, methamphetamine, nicotine, and alcohol, and is also observed in the conditioned place preference model in rats and mice. This phenomenon, however, is stressor specific and not all stressors induce reinstatement of drug seeking. (2) Neuropharmacological studies indicate the involvement of corticotropin-releasing factor (CRF), noradrenaline, dopamine, glutamate, kappa/dynorphin, and several other peptide and neurotransmitter systems in stress-induced reinstatement. Neuropharmacology and circuitry studies indicate the involvement of CRF and noradrenaline transmission in bed nucleus of stria terminalis and central amygdala, and dopamine, CRF, kappa/dynorphin, and glutamate transmission in other components of the mesocorticolimbic dopamine system (ventral tegmental area, medial prefrontal cortex, orbitofrontal cortex, and nucleus accumbens). (3) Translational human laboratory studies and a recent clinical trial study show the efficacy of alpha-2 adrenoceptor agonists in decreasing stress-induced drug craving and stress-induced initial heroin lapse.
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Affiliation(s)
- John R Mantsch
- Department of Biomedical Sciences, Marquette University, Milwaukee, Wisconsin, USA
| | - David A Baker
- Department of Biomedical Sciences, Marquette University, Milwaukee, Wisconsin, USA
| | - Douglas Funk
- Center for Addiction and Mental Health, Campbell Family Mental Health Research Institute, University of Toronto, Toronto, ON, Canada
| | - Anh D Lê
- Center for Addiction and Mental Health, Campbell Family Mental Health Research Institute, University of Toronto, Toronto, ON, Canada
| | - Yavin Shaham
- Intramural Research Program, NIDA-NIH, Baltimore, MD, USA
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Venniro M, Caprioli D, Shaham Y. Animal models of drug relapse and craving: From drug priming-induced reinstatement to incubation of craving after voluntary abstinence. PROGRESS IN BRAIN RESEARCH 2015; 224:25-52. [PMID: 26822352 DOI: 10.1016/bs.pbr.2015.08.004] [Citation(s) in RCA: 202] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
High rates of relapse to drug use during abstinence is a defining feature of drug addiction. In abstinent drug users, drug relapse is often precipitated by acute exposure to the self-administered drug, drug-associated cues, stress, as well as by short-term and protracted withdrawal symptoms. In this review, we discuss different animal models that have been used to study behavioral and neuropharmacological mechanisms of these relapse-related phenomena. In the first part, we discuss relapse models in which abstinence is achieved through extinction training, including the established reinstatement model, as well as the reacquisition and resurgence models. In the second part, we discuss recent animal models in which drug relapse is assessed after either forced abstinence (e.g., the incubation of drug craving model) or voluntary (self-imposed) abstinence achieved either by introducing adverse consequences to ongoing drug self-administration (e.g., punishment) or by an alternative nondrug reward using a discrete choice (drug vs. palatable food) procedure. We conclude by briefly discussing the potential implications of the recent developments of animal models of drug relapse after voluntary abstinence to the development of medications for relapse prevention.
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Affiliation(s)
- Marco Venniro
- Behavioral Neuroscience Research Branch, Intramural Research Program, NIDA, NIH, Baltimore, MD, USA; Department of Public Health and Community Medicine, Neuropsychopharmacology Laboratory, Section of Pharmacology, University of Verona, Verona, Italy.
| | - Daniele Caprioli
- Behavioral Neuroscience Research Branch, Intramural Research Program, NIDA, NIH, Baltimore, MD, USA
| | - Yavin Shaham
- Behavioral Neuroscience Research Branch, Intramural Research Program, NIDA, NIH, Baltimore, MD, USA.
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Some of the people, some of the time: field evidence for associations and dissociations between stress and drug use. Psychopharmacology (Berl) 2015; 232:3529-37. [PMID: 26153066 DOI: 10.1007/s00213-015-3998-7] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 06/22/2015] [Indexed: 01/21/2023]
Abstract
RATIONALE Stress's role in drug use is supported by retrospective interview and laboratory studies, but prospective data confirming the association in daily life are sparse. OBJECTIVES This study aims to assess the relationship between drug use and stress in real time with ambulatory monitoring. METHODS For up to 16 weeks, 133 outpatients on opiate agonist treatment used smartphones to report each time they used drugs or felt more stressed than usual. They rated stress-event severity on a 10-point scale and as a hassle, day spoiler, or more than a day spoiler. For analysis, stress reports made within 72 h before a reported use of cocaine or opioid were binned into 24-h periods. RESULTS Of 52 participants who reported stress events in the 72-h timeframe, 41 reported stress before cocaine use and 26 before opioid use. For cocaine use, the severity of stressors, rated numerically (r effect = 0.42, CL95 0.17-0.62, p = 0.00061) and percent rated as "more than a day spoiler" (r effect = 0.34, CL95 0.07-0.56, p = 0.0292)], increased linearly across the three days preceding use. The number of stressors did not predict cocaine use, and no measure of stress predicted opioid use. In ecological momentary assessment (EMA) from the whole sample of 133, stress and drug use occurred independently and there was no overall relationship. CONCLUSIONS EMA did not support the idea that stress is a necessary or sufficient trigger for cocaine or heroin use after accounting for the base rates of stress and use. But EMA did show that stressful events can increase in severity in the days preceding cocaine use.
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Chen YW, Fiscella KA, Bacharach SZ, Tanda G, Shaham Y, Calu DJ. Effect of yohimbine on reinstatement of operant responding in rats is dependent on cue contingency but not food reward history. Addict Biol 2015; 20:690-700. [PMID: 25065697 DOI: 10.1111/adb.12164] [Citation(s) in RCA: 55] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Yohimbine is an alpha-2 adrenoceptor antagonist that has been used in numerous studies as a pharmacological stressor in rodents, monkeys and humans. Recently, yohimbine has become the most common stress manipulation in studies on reinstatement of drug and food seeking. However, the wide range of conditions under which yohimbine promotes reward seeking is significantly greater than that of stressors like intermittent footshock. Here, we addressed two fundamental questions regarding yohimbine's effect on reinstatement of reward seeking: (1) whether the drug's effect on operant responding is dependent on previous reward history or cue contingency, and (2) whether yohimbine is aversive or rewarding under conditions typically used in reinstatement studies. We also used in vivo microdialysis to determine yohimbine's effect on dopamine levels in nucleus accumbens (NAc) and medial prefrontal cortex (mPFC). We found that the magnitude of yohimbine-induced (0.5, 1.0, 2.0 mg/kg) operant responding during the reinstatement tests was critically dependent on the contingency between lever pressing and discrete tone-light cue delivery but not the previous history with food reward during training. We also found that yohimbine (2 mg/kg) did not cause conditioned place aversion. Finally, we found that yohimbine modestly increased dopamine levels in mPFC but not NAc. Results suggest that yohimbine's effects on operant responding in reinstatement studies are likely independent of the history of contingent self-administration of food or drug rewards and may not be related to the commonly assumed stress-like effects of yohimbine.
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Affiliation(s)
- Yu-Wei Chen
- Behavioral Neuroscience Research Branch; NIDA, NIH, DHHS; Baltimore MD USA
| | | | | | - Gianluigi Tanda
- Medication Development Program; Intramural Research Program; NIDA, NIH, DHHS; Baltimore MD USA
| | - Yavin Shaham
- Behavioral Neuroscience Research Branch; NIDA, NIH, DHHS; Baltimore MD USA
| | - Donna J. Calu
- Behavioral Neuroscience Research Branch; NIDA, NIH, DHHS; Baltimore MD USA
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Stress, sex, and addiction: potential roles of corticotropin-releasing factor, oxytocin, and arginine-vasopressin. Behav Pharmacol 2015; 25:445-57. [PMID: 24949572 DOI: 10.1097/fbp.0000000000000049] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Stress sensitivity and sex are predictive factors for the development of neuropsychiatric disorders. Life stresses are not only risk factors for the development of addiction but also are triggers for relapse to drug use. Therefore, it is imperative to elucidate the molecular mechanisms underlying the interactions between stress and drug abuse, as an understanding of this may help in the development of novel and more effective therapeutic approaches to block the clinical manifestations of drug addiction. The development and clinical course of addiction-related disorders do appear to involve neuroadaptations within neurocircuitries that modulate stress responses and are influenced by several neuropeptides. These include corticotropin-releasing factor, the prototypic member of this class, as well as oxytocin and arginine-vasopressin that play important roles in affiliative behaviors. Interestingly, these peptides function to balance emotional behavior, with sexual dimorphism in the oxytocin/arginine-vasopressin systems, a fact that might play an important role in the differential responses of women and men to stressful stimuli and the specific sex-based prevalence of certain addictive disorders. Thus, this review aims to summarize (i) the contribution of sex differences to the function of dopamine systems, and (ii) the behavioral, neurochemical, and anatomical changes in brain stress systems.
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Crofton EJ, Zhang Y, Green TA. Inoculation stress hypothesis of environmental enrichment. Neurosci Biobehav Rev 2015; 49:19-31. [PMID: 25449533 PMCID: PMC4305384 DOI: 10.1016/j.neubiorev.2014.11.017] [Citation(s) in RCA: 133] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2014] [Revised: 10/28/2014] [Accepted: 11/21/2014] [Indexed: 01/28/2023]
Abstract
One hallmark of psychiatric conditions is the vast continuum of individual differences in susceptibility vs. resilience resulting from the interaction of genetic and environmental factors. The environmental enrichment paradigm is an animal model that is useful for studying a range of psychiatric conditions, including protective phenotypes in addiction and depression models. The major question is how environmental enrichment, a non-drug and non-surgical manipulation, can produce such robust individual differences in such a wide range of behaviors. This paper draws from a variety of published sources to outline a coherent hypothesis of inoculation stress as a factor producing the protective enrichment phenotypes. The basic tenet suggests that chronic mild stress from living in a complex environment and interacting non-aggressively with conspecifics can inoculate enriched rats against subsequent stressors and/or drugs of abuse. This paper reviews the enrichment phenotypes, mulls the fundamental nature of environmental enrichment vs. isolation, discusses the most appropriate control for environmental enrichment, and challenges the idea that cortisol/corticosterone equals stress. The intent of the inoculation stress hypothesis of environmental enrichment is to provide a scaffold with which to build testable hypotheses for the elucidation of the molecular mechanisms underlying these protective phenotypes and thus provide new therapeutic targets to treat psychiatric/neurological conditions.
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Affiliation(s)
- Elizabeth J Crofton
- Center for Addiction Research, Mitchell Center for Neurodegenerative Diseases, Department of Pharmacology and Toxicology, University of Texas Medical Branch, 301 University Blvd., Galveston, TX 77555, United States
| | - Yafang Zhang
- Center for Addiction Research, Mitchell Center for Neurodegenerative Diseases, Department of Pharmacology and Toxicology, University of Texas Medical Branch, 301 University Blvd., Galveston, TX 77555, United States
| | - Thomas A Green
- Center for Addiction Research, Mitchell Center for Neurodegenerative Diseases, Department of Pharmacology and Toxicology, University of Texas Medical Branch, 301 University Blvd., Galveston, TX 77555, United States.
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Barker DJ, Bercovicz D, Servilio LC, Simmons SJ, Ma S, Root DH, Pawlak AP, West MO. Rat ultrasonic vocalizations demonstrate that the motivation to contextually reinstate cocaine-seeking behavior does not necessarily involve a hedonic response. Addict Biol 2014; 19:781-90. [PMID: 23506088 DOI: 10.1111/adb.12044] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Human self-reports often indicate that changes in mood are a major contributor to drug relapse. Still, arguments have been made that instances of drug-seeking following abstinence in animal models (i.e. relapse/reinstatement) may be outside of hedonic control. Therefore, the present study utilized ultrasonic vocalizations in the rat in order to evaluate affect during cocaine self-administration and contextual reinstatement of cocaine-seeking in a pre-clinical model of drug relapse (abstinence-reinstatement model). Results show that while subjects effectively reinstated drug-seeking (lever pressing) following 30 days of abstinence, and spontaneously recovered/reinstated drug-seeking following 60 days of abstinence, ultrasonic vocalizations did not increase over baseline levels during either reinstatement session. These results are consistent with previous results from our laboratory and current theories of addiction suggesting that cues that are weakly associated with drug consumption can motivate drug-seeking behavior that is outside of hedonic processing.
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Affiliation(s)
- David J. Barker
- Department of Psychology; Rutgers University; New Brunswick NJ USA
| | | | - Lisa C. Servilio
- Department of Psychology; Rutgers University; New Brunswick NJ USA
- Division of Biological Sciences; University of California; San Diego CA USA
| | - Steven J. Simmons
- Department of Psychology; Rutgers University; New Brunswick NJ USA
- Department of Psychology; Temple University; Philadelphia PA USA
| | - Sisi Ma
- Department of Psychology; Rutgers University; New Brunswick NJ USA
| | - David H. Root
- Neuronal Networks Section: Integrative Neuroscience Research Branch; National Institute on Drug Abuse; Baltimore MD USA
| | | | - Mark O. West
- Department of Psychology; Rutgers University; New Brunswick NJ USA
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40
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Tunstall BJ, Kearns DN. Reinstatement in a cocaine versus food choice situation: reversal of preference between drug and non-drug rewards. Addict Biol 2014; 19:838-48. [PMID: 23551949 DOI: 10.1111/adb.12054] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Recent studies show that when given a mutually exclusive choice between cocaine and food, rats almost exclusively choose food. The present experiment investigated potential shifts in preference between levers associated with either food or cocaine that might occur during extinction (food and cocaine no longer available) and during footshock-induced, cocaine-primed and food-primed reinstatement. During self-administration sessions where food and cocaine were simultaneously available, rats demonstrated a stable food preference, choosing food over cocaine on 83% of trials. During extinction when neither reinforcer was available, no preference between levers was evident and responding decreased until rats responded on the previously food- and cocaine-associated levers at equally low rates. Footshock resulted in a non-specific reinstatement of responding upon both levers, while cocaine priming resulted in a significant preference for cocaine seeking over food seeking. This suggests that the mechanism underlying footshock-induced reinstatement is distinct from that of cocaine-primed reinstatement. Food priming engendered a mild, non-specific increase in responding on both levers. Although rats generally prefer food over cocaine when presented with a choice between these primary reinforcers, the present results suggest that in certain situations, cocaine-seeking behavior prevails over food-seeking behavior.
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Affiliation(s)
| | - David N. Kearns
- Psychology Department; American University; Washington, DC USA
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41
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Chen YW, Fiscella KA, Bacharach SZ, Calu DJ. Effect of cafeteria diet history on cue-, pellet-priming-, and stress-induced reinstatement of food seeking in female rats. PLoS One 2014; 9:e102213. [PMID: 25025329 PMCID: PMC4099011 DOI: 10.1371/journal.pone.0102213] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Accepted: 06/17/2014] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND Relapse to unhealthy eating habits is a major problem in human dietary treatment. The individuals most commonly seeking dietary treatment are overweight or obese women, yet the commonly used rat reinstatement model to study relapse to palatable food seeking during dieting primarily uses normal-weight male rats. To increase the clinical relevance of the relapse to palatable food seeking model, here we pre-expose female rats to a calorically-dense cafeteria diet in the home-cage to make them overweight prior to examining the effect of this diet history on cue-, pellet-priming- and footshock-induced reinstatement of food seeking. METHODS Post-natal day 32 female Long-Evans rats had seven weeks of home-cage access to either chow only or daily or intermittent cafeteria diet alongside chow. Next, they were trained to self-administer normally preferred 45 mg food pellets accompanied by a tone-light cue. After extinction, all rats were tested for reinstatement induced by discrete cue, pellet-priming, and intermittent footshock under extinction conditions. RESULTS Access to daily cafeteria diet and to a lesser degree access to intermittent cafeteria diet decreased food pellet self-administration compared to chow-only. Prior history of these cafeteria diets also reduced extinction responding, cue- and pellet-priming-induced reinstatement. In contrast, modest stress-induced reinstatement was only observed in rats with a history of daily cafeteria diet. CONCLUSION A history of cafeteria diet does not increase the propensity for cue- and pellet-priming-induced relapse in the rat reinstatement model but does appear to make rats more susceptible to footshock stress-induced reinstatement.
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Affiliation(s)
- Yu-Wei Chen
- Intramural Research Program, NIDA/NIH, Baltimore, Maryland, United States of America
| | - Kimberly A. Fiscella
- Intramural Research Program, NIDA/NIH, Baltimore, Maryland, United States of America
| | - Samuel Z. Bacharach
- Intramural Research Program, NIDA/NIH, Baltimore, Maryland, United States of America
| | - Donna J. Calu
- Intramural Research Program, NIDA/NIH, Baltimore, Maryland, United States of America
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42
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Zilkha N, Feigin E, Barnea-Ygael N, Zangen A. Induction of depressive-like effects by subchronic exposure to cocaine or heroin in laboratory rats. J Neurochem 2014; 130:575-82. [PMID: 24798661 DOI: 10.1111/jnc.12753] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2014] [Revised: 04/01/2014] [Accepted: 04/28/2014] [Indexed: 02/01/2023]
Abstract
The effect of psychoactive drugs on depression has usually been studied in cases of prolonged drug addiction and/or withdrawal, without much emphasis on the effects of subchronic or recreational drug use. To address this issue, we exposed laboratory rats to subchronic regimens of heroin or cocaine and tested long-term effects on (i) depressive-like behaviors, (ii) brain-derived neurotrophic factor (BDNF) levels in reward-related brain regions, and (iii) depressive-like behavior following an additional chronic mild stress procedure. The long-term effect of subchronic cocaine exposure was a general reduction in locomotor activity whereas heroin exposure induced a more specific increase in immobility during the forced swim test. Both cocaine and heroin exposure induced alterations in BDNF levels that are similar to those observed in several animal models of depression. Finally, both cocaine and heroin exposure significantly enhanced the anhedonic effect of chronic mild stress. These results suggest that subchronic drug exposure induces depressive-like behavior which is accompanied by modifications in BDNF expression and increases the vulnerability to develop depressive-like behavior following chronic stress. Implications for recreational and small-scale drug users are discussed. In the present study, we examined the long-term effects of limited subchronic drug exposure on depressive-like symptoms. Our results demonstrate that short-term, subchronic administration of either cocaine or heroin promotes some depressive-like behaviors, while inducing alterations in BDNF protein levels similar to alterations observed in several animal models of depression. In addition, subchronic cocaine or heroin enhanced the anhedonic effect of chronic stress.
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Affiliation(s)
- Noga Zilkha
- Department of Neurobiology, Weizmann institute of Science, Rehovot, Israel; Department of Life Sciences, Ben-Gurion University, Beer-Sheva, Israel
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43
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McReynolds JR, Peña DF, Blacktop JM, Mantsch JR. Neurobiological mechanisms underlying relapse to cocaine use: contributions of CRF and noradrenergic systems and regulation by glucocorticoids. Stress 2014; 17:22-38. [PMID: 24328808 DOI: 10.3109/10253890.2013.872617] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Considering its pervasive and uncontrollable influence in drug addicts, understanding the neurobiological processes through which stress contributes to drug use is a critical goal for addiction researchers and will likely be important for the development of effective medications aimed at relapse prevention. In this paper, we review work from our laboratory and others focused on determining the neurobiological mechanisms that underlie and contribute to stress-induced relapse of cocaine use with an emphasis on the actions of corticotropin-releasing factor in the ventral tegmental area (VTA) and a key pathway from the bed nucleus of the stria terminalis to the VTA that is regulated by norepinephrine and beta adrenergic receptors. Additionally, we discuss work suggesting that the influence of stress in cocaine addiction changes and intensifies with repeated cocaine use in an intake-dependent manner and examine the potential role of glucocorticoid hormones in the underlying drug-induced neuroadaptations. It is our hope that research in this area will inform clinical practice and medication development aimed at minimizing the contribution of stress to the addiction cycle, thereby improving treatment outcomes and reducing the societal costs of addiction.
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Affiliation(s)
- Jayme R McReynolds
- Department of Biomedical Sciences, Marquette University , Milwaukee, WI , USA
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44
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Cunningham KA, Anastasio NC. Serotonin at the nexus of impulsivity and cue reactivity in cocaine addiction. Neuropharmacology 2014; 76 Pt B:460-78. [PMID: 23850573 PMCID: PMC4090081 DOI: 10.1016/j.neuropharm.2013.06.030] [Citation(s) in RCA: 97] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 06/24/2013] [Accepted: 06/28/2013] [Indexed: 01/07/2023]
Abstract
Cocaine abuse and addiction remain great challenges on the public health agendas in the U.S. and the world. Increasingly sophisticated perspectives on addiction to cocaine and other drugs of abuse have evolved with concerted research efforts over the last 30 years. Relapse remains a particularly powerful clinical problem as, even upon termination of drug use and initiation of abstinence, the recidivism rates can be very high. The cycling course of cocaine intake, abstinence and relapse is tied to a multitude of behavioral and cognitive processes including impulsivity (a predisposition toward rapid unplanned reactions to stimuli without regard to the negative consequences), and cocaine cue reactivity (responsivity to cocaine-associated stimuli) cited as two key phenotypes that contribute to relapse vulnerability even years into recovery. Preclinical studies suggest that serotonin (5-hydroxytryptamine; 5-HT) neurotransmission in key neural circuits may contribute to these interlocked phenotypes well as the altered neurobiological states evoked by cocaine that precipitate relapse events. As such, 5-HT is an important target in the quest to understand the neurobiology of relapse-predictive phenotypes, to successfully treat this complex disorder and improve diagnostic and prognostic capabilities. This review emphasizes the role of 5-HT and its receptor proteins in key addiction phenotypes and the implications of current findings to the future of therapeutics in addiction. This article is part of a Special Issue entitled 'NIDA 40th Anniversary Issue'.
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Affiliation(s)
- Kathryn A Cunningham
- Center for Addiction Research, Department of Pharmacology and Toxicology, University of Texas Medical Branch, Galveston, TX 77555, USA.
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45
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Dixon CI, Halbout B, King SL, Stephens DN. Deletion of the GABAA α2-subunit does not alter self administration of cocaine or reinstatement of cocaine seeking. Psychopharmacology (Berl) 2014; 231:2695-703. [PMID: 24481569 PMCID: PMC4057633 DOI: 10.1007/s00213-014-3443-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/08/2013] [Accepted: 12/31/2013] [Indexed: 12/04/2022]
Abstract
RATIONALE GABAA receptors containing α2-subunits are highly represented in brain areas that are involved in motivation and reward, and have been associated with addiction to several drugs, including cocaine. We have shown previously that a deletion of the α2-subunit results in an absence of sensitisation to cocaine. OBJECTIVE We investigated the reinforcing properties of cocaine in GABAA α2-subunit knockout (KO) mice using an intravenous self-administration procedure. METHODS α2-subunit wildtype (WT), heterozygous (HT) and KO mice were trained to lever press for a 30 % condensed milk solution. After implantation with a jugular catheter, mice were trained to lever press for cocaine (0.5 mg/kg/infusion) during ten daily sessions. Responding was extinguished and the mice tested for cue- and cocaine-primed reinstatement. Separate groups of mice were trained to respond for decreasing doses of cocaine (0.25, 0.125, 0.06 and 0.03 mg/kg). RESULTS No differences were found in acquisition of lever pressing for milk. All genotypes acquired self-administration of cocaine and did not differ in rates of self-administration, dose dependency or reinstatement. However, whilst WT and HT mice showed a dose-dependent increase in lever pressing during the cue presentation, KO mice did not. CONCLUSIONS Despite a reported absence of sensitisation, motivation to obtain cocaine remains unchanged in KO and HT mice. Reinstatement of cocaine seeking by cocaine and cocaine-paired cues is also unaffected. We postulate that whilst not directly involved in reward perception, the α2-subunit may be involved in modulating the "energising" aspect of cocaine's effects on reward-seeking.
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Affiliation(s)
- C. I. Dixon
- School of Psychology, University of Sussex, Falmer, Brighton, BN1 9QG UK
| | - B. Halbout
- School of Psychology, University of Sussex, Falmer, Brighton, BN1 9QG UK
- Present Address: Department of Microbiology and Molecular Genetics, University of California, Irvine, CA 92697 USA
| | - S. L. King
- School of Psychology, University of Sussex, Falmer, Brighton, BN1 9QG UK
| | - D. N. Stephens
- School of Psychology, University of Sussex, Falmer, Brighton, BN1 9QG UK
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46
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Le Foll B, Di Ciano P, Panlilio LV, Goldberg SR, Ciccocioppo R. Peroxisome proliferator-activated receptor (PPAR) agonists as promising new medications for drug addiction: preclinical evidence. Curr Drug Targets 2013; 14:768-76. [PMID: 23614675 DOI: 10.2174/1389450111314070006] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 04/18/2013] [Accepted: 04/18/2013] [Indexed: 01/11/2023]
Abstract
This review examines the growing literature on the role of peroxisome proliferator-activated receptors (PPARs) in addiction. There are two subtypes of PPAR receptors that have been studied in addiction: PPAR-α and PPAR-γ. The role of each PPAR subtype in common models of addictive behavior, mainly pre-clinical models, is summarized. In particular, studies are reviewed that investigated the effects of PPAR-α agonists on relapse, sensitization, conditioned place preference, withdrawal and drug intake, and effects of PPAR-γ agonists on relapse, withdrawal and drug intake. Finally, studies that investigated the effects of PPAR agonists on neural pathways of addiction are reviewed. Taken together these preclinical data indicate that PPAR agonists are promising new medications for drug addiction treatment.
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Affiliation(s)
- Bernard Le Foll
- Translational Addiction Research Laboratory, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, Toronto, Ontario, Canada.
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47
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Yuan WX, Heng LJ, Ma J, Wang XQ, Qu LJ, Duan L, Kang JJ, Chen LW, Gao GD. Increased expression of cannabinoid receptor 1 in the nucleus accumbens core in a rat model with morphine withdrawal. Brain Res 2013; 1531:102-12. [DOI: 10.1016/j.brainres.2013.07.047] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2013] [Revised: 07/25/2013] [Accepted: 07/27/2013] [Indexed: 01/28/2023]
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48
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Neurobiological mechanisms that contribute to stress-related cocaine use. Neuropharmacology 2013; 76 Pt B:383-94. [PMID: 23916481 DOI: 10.1016/j.neuropharm.2013.07.021] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2013] [Revised: 07/09/2013] [Accepted: 07/12/2013] [Indexed: 12/16/2022]
Abstract
The ability of stressful life events to trigger drug use is particularly problematic for the management of cocaine addiction due to the unpredictable and often uncontrollable nature of stress. For this reason, understanding the neurobiological processes that contribute to stress-related drug use is important for the development of new and more effective treatment strategies aimed at minimizing the role of stress in the addiction cycle. In this review we discuss the neurocircuitry that has been implicated in stress-induced drug use with an emphasis on corticotropin releasing factor actions in the ventral tegmental area (VTA) and an important pathway from the bed nucleus of the stria terminalis to the VTA that is regulated by norepinephrine via actions at beta adrenergic receptors. In addition to the neurobiological mechanisms that underlie stress-induced cocaine seeking, we review findings suggesting that the ability of stressful stimuli to trigger cocaine use emerges and intensifies in an intake-dependent manner with repeated cocaine self-administration. Further, we discuss evidence that the drug-induced neuroadaptations that are necessary for heightened susceptibility to stress-induced drug use are reliant on elevated levels of glucocorticoid hormones at the time of cocaine use. Finally, the potential ability of stress to function as a "stage setter" for drug use - increasing sensitivity to cocaine and drug-associated cues - under conditions where it does not directly trigger cocaine seeking is discussed. As our understanding of the mechanisms through which stress promotes drug use advances, the hope is that so too will the available tools for effectively managing addiction, particularly in cocaine addicts whose drug use is stress-driven. This article is part of a Special Issue entitled 'NIDA 40th Anniversary Issue'.
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49
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Wang B, You ZB, Oleson EB, Cheer JF, Myal S, Wise RA. Conditioned contribution of peripheral cocaine actions to cocaine reward and cocaine-seeking. Neuropsychopharmacology 2013; 38:1763-9. [PMID: 23535778 PMCID: PMC3717534 DOI: 10.1038/npp.2013.75] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Revised: 03/13/2013] [Accepted: 03/13/2013] [Indexed: 11/09/2022]
Abstract
Cocaine has actions in the peripheral nervous system that reliably precede--and thus predict--its soon-to-follow central rewarding effects. In cocaine-experienced animals, the peripheral cocaine signal is relayed to the central nervous system, triggering excitatory input to the ventral tegmental origin of the mesocorticolimbic dopamine system, the system that mediates the rewarding effects of the drug. We used cocaine methiodide, a cocaine analog that does not cross the blood-brain barrier, to isolate the peripheral actions of cocaine and determine their central and behavioral effects in animals first trained to lever-press for cocaine hydrochloride (the centrally acting and abused form of the drug). We first confirmed with fast-scan cyclic voltammetry that cocaine methiodide causes rapid dopamine release from dopamine terminals in cocaine hydrochloride-trained rats. We then compared the ability of cocaine hydrochloride and cocaine methiodide to establish conditioned place preferences in rats with self-administration experience. While cocaine hydrochloride established stronger place preferences, cocaine methiodide was also effective and its effectiveness increased (incubated) over weeks of cocaine abstinence. Cocaine self-administration was extinguished when cocaine methiodide or saline was substituted for cocaine hydrochloride in the intravenous self-administration paradigm, but cocaine hydrochloride and cocaine methiodide each reinstated non-rewarded lever-pressing after extinction. Rats extinguished by cocaine methiodide substitution showed weaker cocaine-induced reinstatement than rats extinguished by saline substitution. These findings suggest that the conditioned peripheral effects of cocaine can contribute significantly to cocaine-induced (but not stress-induced) cocaine craving, and also suggest the cocaine cue as an important target for cue-exposure therapies for cocaine addiction.
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Affiliation(s)
- Bin Wang
- Behavioral Neuroscience Branch, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Department of Health and Human Services, Baltimore, MD, USA
| | - Zhi-Bing You
- Behavioral Neuroscience Branch, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Department of Health and Human Services, Baltimore, MD, USA
| | - Erik B Oleson
- University of Maryland School of Medicine Department of Anatomy and Neurobiology Baltimore, MD, USA
| | - Joseph F Cheer
- University of Maryland School of Medicine Department of Anatomy and Neurobiology Baltimore, MD, USA
| | - Stephanie Myal
- Behavioral Neuroscience Branch, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Department of Health and Human Services, Baltimore, MD, USA
| | - Roy A Wise
- Behavioral Neuroscience Branch, Intramural Research Program, National Institute on Drug Abuse, National Institutes of Health, Department of Health and Human Services, Baltimore, MD, USA,Behavioral Neuroscience Branch, Intramural Research Program, National Institute on Drug Abuse, National Institute on Drug Abuse, National Institutes of Health, Department of Health and Human Services, 5500 Nathan Shock Drive, 251 Bayview Boulevard, Baltimore, MD 21224, USA, Tel: +1 443 740 2460, Fax: +1 443 740 2827, E-mail:
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50
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The use of the reinstatement model to study relapse to palatable food seeking during dieting. Neuropharmacology 2013; 76 Pt B:395-406. [PMID: 23660229 DOI: 10.1016/j.neuropharm.2013.04.030] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2013] [Revised: 03/29/2013] [Accepted: 04/16/2013] [Indexed: 12/14/2022]
Abstract
Excessive consumption of unhealthy foods is a major public health problem. While many people attempt to control their food intake through dieting, many relapse to unhealthy eating habits within a few months. We have begun to study this clinical condition in rats by adapting the reinstatement model, which has been used extensively to study relapse to drug seeking. In our adaptation of the relapse model, reinstatement of palatable food seeking by exposure to food-pellet priming, food-associated cues, or stress is assessed in food-restricted (to mimic dieting) rats after operant food-pellet self-administration training and subsequent extinction of the food-reinforced responding. In this review, we first outline the clinical problem and discuss a recent study in which we assessed the predictive validity of the reinstatement model for studying relapse to food seeking during dieting by using the anorexigenic drug fenfluramine. Next, we summarize results from our initial studies on the role of several stress- and feeding-related peptides (corticotropin-releasing factor, hypocretin, melanin-concentrating hormone, peptide YY3-36) in reinstatement of palatable food seeking. We then present results from our studies on the role of dopamine and medial prefrontal cortex in stress-induced reinstatement of food seeking. We conclude by discussing potential clinical implications. We offer two main conclusions: (1) the food reinstatement model is a simple, reliable, and valid model to study mechanisms of relapse to palatable food seeking during dieting, and to identify medications to prevent this relapse; (2) mechanisms of relapse to food seeking are often dissociable from mechanisms of ongoing food intake. This article is part of a Special Issue entitled 'NIDA 40th Anniversary Issue'.
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