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Römer SS, Bliokas V, Teo JT, Thomas SJ. Food addiction, hormones and blood biomarkers in humans: A systematic literature review. Appetite 2023; 183:106475. [PMID: 36716820 DOI: 10.1016/j.appet.2023.106475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 01/15/2023] [Accepted: 01/23/2023] [Indexed: 01/29/2023]
Abstract
BACKGROUND Food addiction may play a role in rising obesity rates in connection with obesogenic environments and processed food availability, however the concept of food addiction remains controversial. While animal studies show evidence for addictive processes in relation to processed foods, most human studies are psychologically focussed and there is a need to better understand evidence for biological mechanisms of food addiction in humans. Several key hormones are implicated in models of food addiction, due to their key roles in feeding, energy metabolism, stress and addictive behaviours. This systematic literature review examines evidence for relationships between food addiction, hormones and other blood biomarkers. METHODS A series of literature searches was performed in Scopus, PsychInfo, MedLine, ProQuest, CINAHL and Web of Science. A total of 3111 articles were found, of which 1045 were duplicates. Articles were included if they contained a psychometric measurement of food addiction, such as the Yale Food Addiction Scale, as well as addressed the association between FA and hormones or blood biomarkers in humans. Articles were assessed for eligibility by two independent reviewers. RESULTS Sixteen studies were identified that examined relationships between food addiction and blood biomarkers, published between 2015 and 2021. Significant findings were reported for leptin, ghrelin, cortisol, insulin and glucose, oxytocin, cholesterol, plasma dopamine, thyroid stimulating hormone (TSH), haemoglobin A1c (HbA1c), triglyceride (TG), amylin, tumour necrosis factor alpha (TNF- α) and cholecystokinin (CCK). Methodological issues included small sample sizes and variation in obesity status, sex and mental health-related comorbidities. Due to methodological limitations, definite connections between FA, hormones and other blood biomarkers cannot yet be determined. CONCLUSION This systematic review identified preliminary evidence linking FA symptoms to hormones and other blood biomarkers related to feeding, addiction, and stress. However, due to the small number of studies and methodological limitations, further research is needed to evaluate biopsychosocial models of FA and to resolve controversies.
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Affiliation(s)
- Stephanie Sophie Römer
- School of Psychology, Faculty of the Arts, Social Sciences and Humanities, University of Wollongong, Australia.
| | - Vida Bliokas
- School of Psychology, Faculty of the Arts, Social Sciences and Humanities, University of Wollongong, Australia; Illawarra Health and Medical Research Institute, University of Wollongong, 2522, Australia.
| | - Jillian Terese Teo
- School of Psychology, Faculty of the Arts, Social Sciences and Humanities, University of Wollongong, Australia.
| | - Susan J Thomas
- Illawarra Health and Medical Research Institute, University of Wollongong, 2522, Australia; Graduate School of Medicine, Faculty of Science, Medicine and Health, University of Wollongong, Australia.
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2
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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: 14] [Impact Index Per Article: 7.0] [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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3
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A review of sex differences in the mechanisms and drivers of overeating. Front Neuroendocrinol 2021; 63:100941. [PMID: 34454955 DOI: 10.1016/j.yfrne.2021.100941] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Revised: 07/23/2021] [Accepted: 08/17/2021] [Indexed: 12/16/2022]
Abstract
Disordered eating is often associated with marked psychological and emotional distress, and severe adverse impact on quality of life. Several factors can influence eating behavior and drive food consumption in excess of energy requirements for homeostasis. It is well established that stress and negative affect contribute to the aetiology of eating disorders and weight gain, and there is substantial evidence suggesting sex differences in sub-clinical and clinical types of overeating. This review will examine how negative affect and stress shape eating behaviors, and how the relationship between the physiological, endocrine, and neural responses to stress and eating behaviors differs between men and women. We will examine several drivers of overeating and explore possible mechanisms underlying sex differences in eating behavior.
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Fat Addiction: Psychological and Physiological Trajectory. Nutrients 2019; 11:nu11112785. [PMID: 31731681 PMCID: PMC6893421 DOI: 10.3390/nu11112785] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2019] [Revised: 11/07/2019] [Accepted: 11/12/2019] [Indexed: 02/07/2023] Open
Abstract
Obesity has become a major public health concern worldwide due to its high social and economic burden, caused by its related comorbidities, impacting physical and mental health. Dietary fat is an important source of energy along with its rewarding and reinforcing properties. The nutritional recommendations for dietary fat vary from one country to another; however, the dietary reference intake (DRI) recommends not consuming more than 35% of total calories as fat. Food rich in fat is hyperpalatable, and is liable to be consumed in excess amounts. Food addiction as a concept has gained traction in recent years, as some aspects of addiction have been demonstrated for certain varieties of food. Fat addiction can be a diagnosable condition, which has similarities with the construct of addictive disorders, and is distinct from eating disorders or normal eating behaviors. Psychological vulnerabilities like attentional biases have been identified in individuals described to be having such addiction. Animal models have provided an opportunity to explore this concept in an experimental setting. This discussion sheds light on fat addiction, and explores its physiological and psychological implications. The discussion attempts to collate the emerging literature on addiction to fat rich diets as a prominent subset of food addiction. It aims at addressing the clinical relevance at the community level, the psychological correlates of such fat addiction, and the current physiological research directions.
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Novelle MG, Diéguez C. Food Addiction and Binge Eating: Lessons Learned from Animal Models. Nutrients 2018; 10:E71. [PMID: 29324652 PMCID: PMC5793299 DOI: 10.3390/nu10010071] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 12/26/2017] [Accepted: 01/09/2018] [Indexed: 01/10/2023] Open
Abstract
The feeding process is required for basic life, influenced by environment cues and tightly regulated according to demands of the internal milieu by regulatory brain circuits. Although eating behaviour cannot be considered "addictive" under normal circumstances, people can become "addicted" to this behaviour, similarly to how some people are addicted to drugs. The symptoms, cravings and causes of "eating addiction" are remarkably similar to those experienced by drug addicts, and both drug-seeking behaviour as eating addiction share the same neural pathways. However, while the drug addiction process has been highly characterised, eating addiction is a nascent field. In fact, there is still a great controversy over the concept of "food addiction". This review aims to summarize the most relevant animal models of "eating addictive behaviour", emphasising binge eating disorder, that could help us to understand the neurobiological mechanisms hidden under this behaviour, and to improve the psychotherapy and pharmacological treatment in patients suffering from these pathologies.
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Affiliation(s)
- Marta G Novelle
- Department of Physiology, Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de Compostela-Instituto de Investigación Sanitaria (IDIS), CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, 15786 Santiago de Compostela, Spain.
| | - Carlos Diéguez
- Department of Physiology, Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de Compostela-Instituto de Investigación Sanitaria (IDIS), CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, 15786 Santiago de Compostela, Spain.
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6
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Granero R, Jiménez-Murcia S, Gearhardt AN, Agüera Z, Aymamí N, Gómez-Peña M, Lozano-Madrid M, Mallorquí-Bagué N, Mestre-Bach G, Neto-Antao MI, Riesco N, Sánchez I, Steward T, Soriano-Mas C, Vintró-Alcaraz C, Menchón JM, Casanueva FF, Diéguez C, Fernández-Aranda F. Validation of the Spanish Version of the Yale Food Addiction Scale 2.0 (YFAS 2.0) and Clinical Correlates in a Sample of Eating Disorder, Gambling Disorder, and Healthy Control Participants. Front Psychiatry 2018; 9:208. [PMID: 29887808 PMCID: PMC5980980 DOI: 10.3389/fpsyt.2018.00208] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/24/2018] [Accepted: 05/03/2018] [Indexed: 12/12/2022] Open
Abstract
Aims: Due to the increasing evidence of shared vulnerabilities between addictive behaviors and excessive food intake, the concept of food addiction in specific clinical populations has become a topic of scientific interest. The aim of this study was to validate the Yale Food Addiction Scale (YFAS) 2.0 in a Spanish sample. We also sought to explore food addiction and its clinical correlates in eating disorder (ED) and gambling disorder (GD) patients. Methods: The sample included 301 clinical cases (135 ED and 166 GD), diagnosed according to DSM-5 criteria, and 152 healthy controls (HC) recruited from the general population. Results: Food addiction was more prevalent in patients with ED, than in patients with GD and HC (77.8, 7.8, and 3.3%, respectively). Food addiction severity was associated with higher BMI, psychopathology and specific personality traits, such as higher harm avoidance, and lower self-directedness. The psychometrical properties of the Spanish version of the YFAS 2.0 were excellent with good convergent validity. Moreover, it obtained good accuracy in discriminating between diagnostic subtypes. Conclusions: Our results provide empirical support for the use of the Spanish YFAS 2.0 as a reliable and valid tool to assess food addiction among several clinical populations (namely ED and GD). The prevalence of food addiction is heterogeneous between disorders. Common risk factors such as high levels of psychopathology and low self-directedness appear to be present in individuals with food addiction.
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Affiliation(s)
- Roser Granero
- Ciber Fisiopatología Obesidad y Nutrición, Instituto Salud Carlos III, Barcelona, Spain.,Departament de Psicobiologia i Metodologia, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Susana Jiménez-Murcia
- Ciber Fisiopatología Obesidad y Nutrición, Instituto Salud Carlos III, Barcelona, Spain.,Department of Psychiatry, University Hospital of Bellvitge-IDIBELL, Barcelona, Spain.,Department of Clinical Sciences, School of Medicine and Health Sciences, University of Barcelona, Barcelona, Spain
| | - Ashley N Gearhardt
- Department of Psychology, University of Michigan, Ann Arbor, MI, United States
| | - Zaida Agüera
- Ciber Fisiopatología Obesidad y Nutrición, Instituto Salud Carlos III, Barcelona, Spain.,Department of Psychiatry, University Hospital of Bellvitge-IDIBELL, Barcelona, Spain
| | - Neus Aymamí
- Department of Psychiatry, University Hospital of Bellvitge-IDIBELL, Barcelona, Spain
| | - Mónica Gómez-Peña
- Department of Psychiatry, University Hospital of Bellvitge-IDIBELL, Barcelona, Spain
| | - María Lozano-Madrid
- Ciber Fisiopatología Obesidad y Nutrición, Instituto Salud Carlos III, Barcelona, Spain.,Department of Psychiatry, University Hospital of Bellvitge-IDIBELL, Barcelona, Spain
| | - Núria Mallorquí-Bagué
- Ciber Fisiopatología Obesidad y Nutrición, Instituto Salud Carlos III, Barcelona, Spain.,Department of Psychiatry, University Hospital of Bellvitge-IDIBELL, Barcelona, Spain
| | - Gemma Mestre-Bach
- Ciber Fisiopatología Obesidad y Nutrición, Instituto Salud Carlos III, Barcelona, Spain.,Department of Psychiatry, University Hospital of Bellvitge-IDIBELL, Barcelona, Spain
| | - Maria I Neto-Antao
- Department of Psychiatry, University Hospital of Bellvitge-IDIBELL, Barcelona, Spain
| | - Nadine Riesco
- Department of Psychiatry, University Hospital of Bellvitge-IDIBELL, Barcelona, Spain
| | - Isabel Sánchez
- Department of Psychiatry, University Hospital of Bellvitge-IDIBELL, Barcelona, Spain
| | - Trevor Steward
- Ciber Fisiopatología Obesidad y Nutrición, Instituto Salud Carlos III, Barcelona, Spain.,Department of Psychiatry, University Hospital of Bellvitge-IDIBELL, Barcelona, Spain
| | - Carles Soriano-Mas
- Department of Psychiatry, University Hospital of Bellvitge-IDIBELL, Barcelona, Spain.,CIBER Salud Mental Instituto Salud Carlos III, Barcelona, Spain
| | | | - José M Menchón
- Department of Psychiatry, University Hospital of Bellvitge-IDIBELL, Barcelona, Spain.,Department of Clinical Sciences, School of Medicine and Health Sciences, University of Barcelona, Barcelona, Spain.,CIBER Salud Mental Instituto Salud Carlos III, Barcelona, Spain
| | - Felipe F Casanueva
- Ciber Fisiopatología Obesidad y Nutrición, Instituto Salud Carlos III, Barcelona, Spain.,Laboratory of Molecular and Cellular Endocrinology, Research Area Complejo Hospitalario Universitario de Santiago de Compostela, A Coruña, Spain
| | - Carlos Diéguez
- Ciber Fisiopatología Obesidad y Nutrición, Instituto Salud Carlos III, Barcelona, Spain.,Department of Physiology, CIMUS University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela, Spain
| | - Fernando Fernández-Aranda
- Ciber Fisiopatología Obesidad y Nutrición, Instituto Salud Carlos III, Barcelona, Spain.,Department of Psychiatry, University Hospital of Bellvitge-IDIBELL, Barcelona, Spain.,Department of Clinical Sciences, School of Medicine and Health Sciences, University of Barcelona, Barcelona, Spain
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7
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Jiménez-Murcia S, Granero R, Wolz I, Baño M, Mestre-Bach G, Steward T, Agüera Z, Hinney A, Diéguez C, Casanueva FF, Gearhardt AN, Hakansson A, Menchón JM, Fernández-Aranda F. Food Addiction in Gambling Disorder: Frequency and Clinical Outcomes. Front Psychol 2017; 8:473. [PMID: 28421009 PMCID: PMC5378803 DOI: 10.3389/fpsyg.2017.00473] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Accepted: 03/14/2017] [Indexed: 01/08/2023] Open
Abstract
Background: The food addiction (FA) model is receiving increasing interest from the scientific community. Available empirical evidence suggests that this condition may play an important role in the development and course of physical and mental health conditions such as obesity, eating disorders, and other addictive behaviors. However, no epidemiological data exist on the comorbidity of FA and gambling disorder (GD), or on the phenotype for the co-occurrence of GD+FA. Objectives: To determine the frequency of the comorbid condition GD+FA, to assess whether this comorbidity features a unique clinical profile compared to GD without FA, and to generate predictive models for the presence of FA in a GD sample. Method: Data correspond to N = 458 treatment-seeking patients who met criteria for GD in a hospital unit specialized in behavioral addictions. Results: Point prevalence for FA diagnosis was 9.2%. A higher ratio of FA was found in women (30.5%) compared to men (6.0%). Lower FA prevalence was associated with older age. Patients with high FA scores were characterized by worse psychological state, and the risk of a FA diagnosis was increased in patients with high scores in the personality traits harm avoidance and self-transcendence, and low scores in cooperativeness (R2 = 0.18). Conclusion: The co-occurrence of FA in treatment-seeking GD patients is related to poorer emotional and psychological states. GD treatment interventions and related behavioral addictions should consider potential associations with problematic eating behavior and aim to include techniques that aid patients in better managing this behavior.
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Affiliation(s)
- Susana Jiménez-Murcia
- Pathological Gambling Unit, Department of Psychiatry, Bellvitge University Hospital-IDIBELLBarcelona, Spain.,Ciber Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto de Salud Carlos IIIBarcelona, Spain.,Department of Clinical Sciences, Faculty of Medicine, University of BarcelonaBarcelona, Spain
| | - Roser Granero
- Ciber Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto de Salud Carlos IIIBarcelona, Spain.,Departament de Psicobiologia i Metodologia de les Ciències de la Salut, Universitat Autònoma de BarcelonaBarcelona, Spain
| | - Ines Wolz
- Pathological Gambling Unit, Department of Psychiatry, Bellvitge University Hospital-IDIBELLBarcelona, Spain.,Ciber Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto de Salud Carlos IIIBarcelona, Spain
| | - Marta Baño
- Pathological Gambling Unit, Department of Psychiatry, Bellvitge University Hospital-IDIBELLBarcelona, Spain
| | - Gemma Mestre-Bach
- Pathological Gambling Unit, Department of Psychiatry, Bellvitge University Hospital-IDIBELLBarcelona, Spain.,Ciber Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto de Salud Carlos IIIBarcelona, Spain
| | - Trevor Steward
- Pathological Gambling Unit, Department of Psychiatry, Bellvitge University Hospital-IDIBELLBarcelona, Spain.,Ciber Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto de Salud Carlos IIIBarcelona, Spain
| | - Zaida Agüera
- Pathological Gambling Unit, Department of Psychiatry, Bellvitge University Hospital-IDIBELLBarcelona, Spain.,Ciber Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto de Salud Carlos IIIBarcelona, Spain
| | - Anke Hinney
- Department of Child and Adolescent Psychiatry, University Hospital Essen, University of Duisburg-EssenEssen, Germany
| | - Carlos Diéguez
- Ciber Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto de Salud Carlos IIIBarcelona, Spain.,Department of Physiology, Centro Singular de Investigación en Medicina Molecular y Enfermedades Crónicas, University of Santiago de Compostela-Instituto de Investigación SanitariaSantiago de Compostela, Spain
| | - Felipe F Casanueva
- Ciber Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto de Salud Carlos IIIBarcelona, Spain.,Laboratory of Molecular and Cellular Endocrinology, Research Area, Complejo Hospitalario Universitario de Santiago de CompostelaSantiago de Compostela, Spain
| | | | - Anders Hakansson
- Lund University, Faculty of Medicine, Department of Clinical Sciences Lund, PsychiatryLund, Sweden
| | - José M Menchón
- Pathological Gambling Unit, Department of Psychiatry, Bellvitge University Hospital-IDIBELLBarcelona, Spain.,Department of Clinical Sciences, Faculty of Medicine, University of BarcelonaBarcelona, Spain.,Ciber Salud Mental (CIBERSAM), Instituto Carlos IIIBarcelona, Spain
| | - Fernando Fernández-Aranda
- Pathological Gambling Unit, Department of Psychiatry, Bellvitge University Hospital-IDIBELLBarcelona, Spain.,Ciber Fisiopatología Obesidad y Nutrición (CIBERObn), Instituto de Salud Carlos IIIBarcelona, Spain.,Department of Clinical Sciences, Faculty of Medicine, University of BarcelonaBarcelona, Spain
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8
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Li Y, Zheng X, Xu N, Zhang Y, Liu Z, Bai Y. The consummatory and motivational behaviors for natural rewards following long-term withdrawal from morphine: no anhedonia but persistent maladaptive behaviors for high-value rewards. Psychopharmacology (Berl) 2017; 234:1277-1292. [PMID: 28229178 DOI: 10.1007/s00213-017-4565-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2016] [Accepted: 02/06/2017] [Indexed: 11/30/2022]
Abstract
RATIONALE The negative affective state, e.g., anhedonia, emerges after abstinence from abused drugs may be linked to the motivational processes of drug craving and relapse. Although anhedonia diminishes over time with drug abstinence, it is not yet rather explicit whether anhedonia exists or not following protracted withdrawal. OBJECTIVES The behavioral responses to natural rewards were examined after 2 to 3 weeks withdrawal from morphine. Male rats were pretreated with either a binge-like morphine paradigm or daily saline injection for 5 days. The consummatory and motivational behaviors for three natural rewards (sucrose solutions 4, 15, and 60%, social stimulus: male rat, and sexual stimulus: estrous female rat) were examined under varied testing conditions. RESULTS The morphine-withdrawn rats significantly increased their intake of 15% sucrose solution during the 1-h consumption test and their operant responding for 15% sucrose solution under a progressive ratio (PR) schedule of reinforcement. When obtaining a reinforcer was associated with a 0.5 mA foot shock under a PR-punishment schedule, the morphine-withdrawn rats showed a higher performance for 60% sucrose solution. Meanwhile, the morphine-withdrawn rats displayed a higher motivation to sexual stimulus during the free-approach test and more approaching behaviors towards sexual stimulus in a conflict-based approach test (concurrent presence of reward and aversive stimulus). CONCLUSIONS No anhedonia-like behavior but sensitized behaviors for natural rewards were found after long-term morphine withdrawal. Notably, the morphine-withdrawn rats displayed persistent motivated behaviors for high-value rewards (60% sucrose and sexual stimulus) in the conflict tests suggesting impairments in inhibitory control in morphine-treated rats.
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Affiliation(s)
- Yingying Li
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Xigeng Zheng
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Na Xu
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yue Zhang
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Zhengkui Liu
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China.,University of Chinese Academy of Sciences, Beijing, China
| | - Yunjing Bai
- CAS Key Laboratory of Mental Health, Institute of Psychology, Beijing, China. .,University of Chinese Academy of Sciences, Beijing, China.
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9
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Reichelt AC, Abbott KN, Westbrook RF, Morris MJ. Differential motivational profiles following adolescent sucrose access in male and female rats. Physiol Behav 2016; 157:13-9. [PMID: 26826605 DOI: 10.1016/j.physbeh.2016.01.038] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2015] [Revised: 01/24/2016] [Accepted: 01/26/2016] [Indexed: 01/22/2023]
Abstract
Adolescents are the highest consumers of sugar sweetened drinks. Excessive consumption of such drinks is a likely contributor to the development of obesity and may be associated with enduring changes in the systems involved in reward and motivation. We examined the impact of daily sucrose consumption in young male and female rats (N=12 per group) across the adolescent period on the motivation to perform instrumental responses to gain food rewards as adults. Rats were or were not exposed to a sucrose solution for 2 h each day for 28 days across adolescence [postnatal days (P) 28-56]. They were then trained as adults (P70 onward) to lever press for a palatable 15% cherry flavored sucrose reward and tested on a progressive ratio (PR) schedule to assess motivation to respond for reinforcement. Female rats exposed to sucrose had higher breakpoints on the PR schedule than controls, whereas male rats exposed to sucrose had lower breakpoints than controls. These results show that consumption of sucrose during adolescence produced sex-specific behavioral changes in responding for sucrose as adults.
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10
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Developmental emergence of an obsessive-compulsive phenotype and binge behavior in rats. Psychopharmacology (Berl) 2015; 232:3173-81. [PMID: 26018530 PMCID: PMC4536183 DOI: 10.1007/s00213-015-3967-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2015] [Accepted: 05/11/2015] [Indexed: 12/22/2022]
Abstract
RATIONALE Obsessive-compulsive disorder (OCD) gradually emerges and reaches clinical significance during early adulthood. Whether a predisposition for OCD manifests as binge eating disorder earlier during adolescence is proposed. OBJECTIVES To further characterize how OCD-like behaviors increase across maturation and to determine whether an OCD-like predisposition increases the likelihood of binge eating during adolescence. METHODS Male and female Sprague-Dawley rats were injected with the tricyclic antidepressant clomipramine (CMI, 15 mg/kg) or saline vehicle twice daily between postnatal days 9-15. Both groups were tested for perseverative (spontaneous alternation) and anxiety-like (elevated plus maze; marble burying) behaviors during juvenility (day 28), adolescence (day 60), and adulthood (day 90). Both motivations to eat sucrose pellets and binge eating on fat were investigated. RESULTS Sex- and age-dependent increases in anxiety-like and perseverative behavior were observed in CMI subjects. Differences in consummatory behaviors emerged during late adolescence, while no significant differences in alternation or anxiety-like behaviors were detected between CMI and vehicle animals until adulthood. Adolescent CMI females consumed more sucrose pellets in 30 min relative to vehicle females, whereas adolescent CMI males consumed approximately half as much as vehicle males. Sucrose consumption did not differ between groups in adulthood. Adolescent CMI rats demonstrated more fat bingeing than vehicles, independent of sex. CONCLUSIONS OCD-like behaviors are emerging during adolescence, but sucrose consumption and fat bingeing in CMI-treated animals significantly precedes the appearance of anxiety and perseveration. This OCD-like phenotype emerges fully during adulthood, suggesting that eating may likely serve as a coping strategy in these animals.
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11
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Harb MR, Almeida OFX. Pavlovian conditioning and cross-sensitization studies raise challenges to the hypothesis that overeating is an addictive behavior. Transl Psychiatry 2014; 4:e387. [PMID: 24780921 PMCID: PMC4012290 DOI: 10.1038/tp.2014.28] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2013] [Revised: 03/11/2014] [Accepted: 03/18/2014] [Indexed: 12/31/2022] Open
Abstract
Elevated glucocorticoid levels and sign tracking (ST) in Pavlovian conditioning are potential biomarkers of compulsive behaviors such as addiction. As overeating is sometimes viewed as a form of addictive behavior, we hypothesized that murine Pavlovian sign trackers would have a greater propensity to overeat and develop obesity. Using a food reward in the classical conditioning paradigm, we show that ST behavior is a robust conditioned response but not a predictor of eating and growth trajectories in mice, thus challenging the view that the development of obesity and drug addiction depend on identical mechanisms. This interpretation was supported by experiments which showed that overweight mice do not display cross-sensitization to an addictive drug (morphine), and conversely, that overweight morphine-sensitized animals do not overconsume a highly rewarding food. Although the rewarding/motivational effects of both food and drugs of abuse are mediated by similar neurochemical mechanisms, obesity and drug addiction represent a summation of other dysfunctional input and output pathways that lead to the emergence of two distinct disorders, each of which would deserve a specific pharmacotherapeutic approach.
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Affiliation(s)
- M R Harb
- NeuroAdaptations Group, Max Planck Institute of Psychiatry, Munich, Germany,Institute of Life & Health Sciences (ICVS), University of Minho, Braga, Portugal
| | - O F X Almeida
- NeuroAdaptations Group, Max Planck Institute of Psychiatry, Munich, Germany,Max Planck Institute of Psychiatry, Kraepelinstrasse 2–10, 80804 Munich, Germany. E-mail:
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12
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Eisenstein SA, Antenor-Dorsey JAV, Gredysa DM, Koller JM, Bihun EC, Ranck SA, Arbeláez AM, Klein S, Perlmutter JS, Moerlein SM, Black KJ, Hershey T. A comparison of D2 receptor specific binding in obese and normal-weight individuals using PET with (N-[(11)C]methyl)benperidol. Synapse 2013; 67:748-56. [PMID: 23650017 PMCID: PMC3778147 DOI: 10.1002/syn.21680] [Citation(s) in RCA: 74] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2013] [Revised: 04/20/2013] [Accepted: 04/27/2013] [Indexed: 01/11/2023]
Abstract
Previous PET imaging studies have demonstrated mixed findings regarding dopamine D2/D3 receptor availability in obese relative to nonobese humans. Nonspecific D2/D3 radioligands do not allow for separate estimation of D2 receptor (D2R) and D3 receptor (D3R) subtypes of the D2 receptor family, which may play different roles in behavior and are distributed differently throughout the brain. These radioligands are also displaceable by endogenous dopamine, confounding interpretation of differences in receptor availability with differing levels of dopamine release. The present study used PET imaging with the D2R-selective radioligand (N-[(11)C] methyl)benperidol ([(11)C]NMB), which is nondisplaceable by endogenous dopamine, to estimate D2R specific binding (BPND) and its relationship to body mass index (BMI) and age in 15 normal-weight (mean BMI = 22.6 kg/m(2)) and 15 obese (mean BMI = 40.3 kg/m(2)) men and women. Subjects with illnesses or taking medications that interfere with dopamine signaling were excluded. Striatal D2R BPND was calculated using the Logan graphical method with cerebellum as a reference region. D2R BPND estimates were higher in putamen and caudate relative to nucleus accumbens, but did not differ between normal-weight and obese groups. BMI values did not correlate with D2R BPND . Age was negatively correlated with putamen D2R BPND in both groups. These results suggest that altered D2R specific binding is not involved in the pathogenesis of obesity per se and underscore the need for additional studies evaluating the relationship between D3R, dopamine reuptake, or endogenous dopamine release and human obesity.
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Affiliation(s)
- Sarah A. Eisenstein
- Department of Psychiatry, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
| | - Jo Ann V. Antenor-Dorsey
- Department of Psychiatry, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
| | - Danuta M. Gredysa
- Department of Psychiatry, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
| | - Jonathan M. Koller
- Department of Psychiatry, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
| | - Emily C. Bihun
- Department of Psychiatry, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
| | - Samantha A. Ranck
- Department of Psychiatry, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
| | - Ana Maria Arbeláez
- Department of Pediatrics, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
| | - Samuel Klein
- Department of Internal Medicine, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
| | - Joel S. Perlmutter
- Department of Neurology, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
- Department of Radiology, Washington University School of Medicine in St. Louis, Mallinckrodt Institute of Radiology, 660 S. Euclid Ave., St. Louis, MO 63110
- Department of Anatomy and Neurobiology, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
- Program in Physical Therapy, Washington University School of Medicine in St. Louis, 4444 Forest Park Blvd., St. Louis, MO 63108
- Program in Occupational Therapy, Washington University School of Medicine in St. Louis, 4444 Forest Park Blvd., St. Louis, MO 63108
| | - Stephen M. Moerlein
- Department of Radiology, Washington University School of Medicine in St. Louis, Mallinckrodt Institute of Radiology, 660 S. Euclid Ave., St. Louis, MO 63110
- Department of Biochemistry and Molecular Biophysics, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
| | - Kevin J. Black
- Department of Psychiatry, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
- Department of Neurology, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
- Department of Radiology, Washington University School of Medicine in St. Louis, Mallinckrodt Institute of Radiology, 660 S. Euclid Ave., St. Louis, MO 63110
- Department of Anatomy and Neurobiology, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
| | - Tamara Hershey
- Department of Psychiatry, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
- Department of Neurology, Washington University School of Medicine in St. Louis, 660 S. Euclid Ave., St. Louis, MO 63110
- Department of Radiology, Washington University School of Medicine in St. Louis, Mallinckrodt Institute of Radiology, 660 S. Euclid Ave., St. Louis, MO 63110
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de Jong JW, Meijboom KE, Vanderschuren LJMJ, Adan RAH. Low control over palatable food intake in rats is associated with habitual behavior and relapse vulnerability: individual differences. PLoS One 2013; 8:e74645. [PMID: 24058616 PMCID: PMC3769238 DOI: 10.1371/journal.pone.0074645] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2013] [Accepted: 08/02/2013] [Indexed: 01/06/2023] Open
Abstract
The worldwide obesity epidemic poses an enormous and growing threat to public health. However, the neurobehavioral mechanisms of overeating and obesity are incompletely understood. It has been proposed that addiction-like processes may underlie certain forms of obesity, in particular those associated with binge eating disorder. To investigate the role of addiction-like processes in obesity, we adapted a model of cocaine addiction-like behavior in rats responding for highly palatable food. Here, we tested whether rats responding for highly palatable chocolate Ensure would come to show three criteria of addiction-like behavior, i.e., high motivation, continued seeking despite signaled non-availability and persistence of seeking despite aversive consequences. We also investigated whether exposure to a binge model (a diet consisting of alternating periods of limited food access and access to highly palatable food), promotes the appearance of food addiction-like behavior. Our data show substantial individual differences in control over palatable food seeking and taking, but no distinct subgroup of animals showing addiction-like behavior could be identified. Instead, we observed a wide range extending from low to very high control over palatable food intake. Exposure to the binge model did not affect control over palatable food seeking and taking, however. Animals that showed low control over palatable food intake (i.e., scored high on the three criteria for addiction-like behavior) were less sensitive to devaluation of the food reward and more prone to food-induced reinstatement of extinguished responding, indicating that control over palatable food intake is associated with habitual food intake and vulnerability to relapse. In conclusion, we present an animal model to assess control over food seeking and taking. Since diminished control over food intake is a major factor in the development of obesity, understanding its behavioral and neural underpinnings may facilitate improved management of the obesity epidemic.
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Affiliation(s)
- Johannes W. de Jong
- Rudolf Magnus Institute of Neuroscience, Department of Neuroscience and Pharmacology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Karin E. Meijboom
- Rudolf Magnus Institute of Neuroscience, Department of Neuroscience and Pharmacology, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Louk J. M. J. Vanderschuren
- Rudolf Magnus Institute of Neuroscience, Department of Neuroscience and Pharmacology, University Medical Center Utrecht, Utrecht, The Netherlands
- Department of Animals in Science and Society, Division of Behavioural Neuroscience, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - Roger A. H. Adan
- Rudolf Magnus Institute of Neuroscience, Department of Neuroscience and Pharmacology, University Medical Center Utrecht, Utrecht, The Netherlands
- * E-mail:
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14
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Davis C. From passive overeating to "food addiction": a spectrum of compulsion and severity. ISRN OBESITY 2013; 2013:435027. [PMID: 24555143 PMCID: PMC3901973 DOI: 10.1155/2013/435027] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/20/2013] [Accepted: 04/16/2013] [Indexed: 01/17/2023]
Abstract
A psychobiological dimension of eating behaviour is proposed, which is anchored at the low end by energy intake that is relatively well matched to energy output and is reflected by a stable body mass index (BMI) in the healthy range. Further along the continuum are increasing degrees of overeating (and BMI) characterized by more severe and more compulsive ingestive behaviours. In light of the many similarities between chronic binge eating and drug abuse, several authorities have adopted the perspective that an apparent dependence on highly palatable food-accompanied by emotional and social distress-can be best conceptualized as an addiction disorder. Therefore, this review also considers the overlapping symptoms and characteristics of binge eating disorder (BED) and models of food addiction, both in preclinical animal studies and in human research. It also presents this work in the context of the modern and "toxic" food environment and therein the ubiquitous triggers for over-consumption. We complete the review by providing evidence that what we have come to call "food addiction" may simply be a more acute and pathologically dense form of BED.
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Affiliation(s)
- Caroline Davis
- Kinesiology & Health Sciences, Faculty of Health, York University, 343 Bethune College, 4700 Keele Street, Toronto, ON, Canada M3J 1P3
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Salamone JD, Correa M. Dopamine and food addiction: lexicon badly needed. Biol Psychiatry 2013; 73:e15-24. [PMID: 23177385 PMCID: PMC4450088 DOI: 10.1016/j.biopsych.2012.09.027] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2012] [Revised: 09/25/2012] [Accepted: 09/27/2012] [Indexed: 01/26/2023]
Abstract
Over the last few years, the concept of food addiction has become a common feature in the scientific literature, as well as the popular press. Nevertheless, the use of the term addiction to describe pathological aspects of food intake in humans remains controversial, and even among those who affirm the validity of the concept, there is considerable disagreement about its utility for explaining the increasing prevalence of obesity throughout much of the world. An examination of the literature on food addiction indicates that mesolimbic and nigrostriatal dopamine systems often are cited as mechanisms that contribute to the establishment of food addiction. However, in reviewing this literature, it is important to have a detailed consideration of the complex nature of dopaminergic involvement in motivational processes. For example, although it is often stated that mesolimbic dopamine mediates reward, there is no standard or consistent technical meaning of this term. Moreover, there is a persistent tendency to link dopamine transmission with pleasure or hedonia, as opposed to other aspects of motivation or learning. The present article provides a critical discussion of some aspects of the food addiction literature, viewed through the lens of recent findings and current theoretical views of dopaminergic involvement in food motivation. Furthermore, compulsive food intake and binge eating will be considered from an evolutionary perspective, in terms of the motivational subsystems that are involved in adaptive patterns of food consumption and seeking behaviors and a consideration of how these could be altered in pathological conditions.
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Affiliation(s)
- John D Salamone
- Department of Psychology, University of Connecticut, Storrs, Connecticut 06269-1020, USA.
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d-Cycloserine administered directly to infralimbic medial prefrontal cortex enhances extinction memory in sucrose-seeking animals. Neuroscience 2013; 230:24-30. [DOI: 10.1016/j.neuroscience.2012.11.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2012] [Revised: 11/01/2012] [Accepted: 11/03/2012] [Indexed: 01/13/2023]
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Bird SP, Murphy M, Bake T, Albayrak Ö, Mercer JG. Getting science to the citizen--'food addiction' at the British Science Festival as a case study of interactive public engagement with high profile scientific controversy. Obes Facts 2013; 6:103-8. [PMID: 23493065 PMCID: PMC5644754 DOI: 10.1159/000349916] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2012] [Accepted: 01/08/2013] [Indexed: 01/01/2023] Open
Affiliation(s)
- Sue P. Bird
- Rowett Institute of Nutrition and Health, University of Aberdeen, Aberdeen, UK
| | - Michelle Murphy
- Rowett Institute of Nutrition and Health, University of Aberdeen, Aberdeen, UK
| | - Tina Bake
- Rowett Institute of Nutrition and Health, University of Aberdeen, Aberdeen, UK
| | - Özgür Albayrak
- Department of Child and Adolescent Psychiatry, Psychotherapy and Psychosomatics, University of Duisburg-Essen, Essen, Germany
| | - Julian G. Mercer
- Rowett Institute of Nutrition and Health, University of Aberdeen, Aberdeen, UK
- *Prof. Dr. Julian G. Mercer, Rowett Institute of Nutrition and Health, University of Aberdeen, Greenburn Road, Bucksburn, Aberdeen, AB21 9SB (UK),
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Mercer JG, Bird SP. NeuroFAST - the integrated neurobiology of food intake, addiction and stress. Obes Facts 2012; 5:293-7. [PMID: 22647310 DOI: 10.1159/000338824] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Accepted: 03/25/2012] [Indexed: 11/19/2022] Open
Affiliation(s)
- Julian G Mercer
- Rowett Institute of Nutrition and Health, University of Aberdeen, Aberdeen, UK
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