1
|
Huang S, Ghasem Ardabili N, Davidson TL, Riley AL. Western diet consumption does not impact the rewarding and aversive effects of morphine in male Sprague-Dawley rats. Physiol Behav 2023; 270:114317. [PMID: 37541607 DOI: 10.1016/j.physbeh.2023.114317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2023] [Revised: 07/31/2023] [Accepted: 08/02/2023] [Indexed: 08/06/2023]
Abstract
The impacts of high-fat and/or high-sugar diets on opioid-induced effects are well documented; however, little is known about the effect of such diet on the affective responses to opiates. To address this issue, in the present experiment male Sprague-Dawley rats were given ad libitum access to a western-style diet (high in saturated fat and sugar) or a standard laboratory chow diet beginning in adolescence and continuing into adulthood at which point they were trained in a combined conditioned taste avoidance (CTA)/conditioned place preference (CPP) procedure to assess the aversive and rewarding effects of morphine, respectively. On four conditioning cycles, animals were given access to a novel saccharin solution, injected with morphine (1 mg/kg or 5 mg/kg), and then placed on one side of a place preference chamber. Animals were then tested for place preference and saccharin preference. All subjects injected with morphine displayed significant avoidance of the morphine-associated solution (CTA) and preferred the side associated with the drug (CPP). Furthermore, there were no differences between the two diet groups, indicating that chronic exposure to the western diet had no impact on the affective properties of morphine (despite increasing caloric intake, body weight, body fat and lean body mass). Given previously reported increases in drug self-administration in animals with a history of western-diet consumption, this study suggests that western-diet exposure may increase drug intake via mechanisms other than changes in the rewarding or aversive effects of the drug.
Collapse
Affiliation(s)
- Shihui Huang
- Psychopharmacology Laboratory, Department of Neuroscience, Center for Neuroscience and Behavior, American University, 4400 Massachusetts Ave, NW., Washington, D.C. 20016, United States.
| | - Negar Ghasem Ardabili
- Psychopharmacology Laboratory, Department of Neuroscience, Center for Neuroscience and Behavior, American University, 4400 Massachusetts Ave, NW., Washington, D.C. 20016, United States
| | - Terry L Davidson
- Laboratory for Behavioral and Neural Homeostasis, Department of Neuroscience, Center for Neuroscience and Behavior, American University, Washington, D.C. 20016, United States
| | - Anthony L Riley
- Psychopharmacology Laboratory, Department of Neuroscience, Center for Neuroscience and Behavior, American University, 4400 Massachusetts Ave, NW., Washington, D.C. 20016, United States.
| |
Collapse
|
2
|
O'Connor RM, Kenny PJ. Utility of 'substance use disorder' as a heuristic for understanding overeating and obesity. Prog Neuropsychopharmacol Biol Psychiatry 2022; 118:110580. [PMID: 35636576 DOI: 10.1016/j.pnpbp.2022.110580] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 05/24/2022] [Accepted: 05/24/2022] [Indexed: 02/07/2023]
Abstract
Rates of obesity and obesity-associated diseases have increased dramatically in countries with developed economies. Substance use disorders (SUDs) are characterized by the persistent use of the substance despite negative consequences. It has been hypothesized that overconsumption of palatable energy dense food can elicit SUD-like maladaptive behaviors that contribute to persistent caloric intake beyond homeostatic need even in the face of negative consequences. Palatable food and drugs of abuse act on many of the same motivation-related circuits in the brain, and can induce, at least superficially, similar molecular, cellular, and physiological adaptations on these circuits. As such, applying knowledge about the neurobiological mechanisms of SUDs may serve as useful heuristic to better understand the persistent overconsumption of palatable food that contributes to obesity. However, many important differences exist between the actions of drugs of abuse and palatable food in the brain. This warrants caution when attributing weight gain and obesity to the manifestation of a putative SUD-related behavioral disorder. Here, we describe similarities and differences between compulsive drug use in SUDs and overconsumption in obesity and consider the merit of the concept of "food addiction".
Collapse
Affiliation(s)
- Richard M O'Connor
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, United States of America
| | - Paul J Kenny
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, United States of America.
| |
Collapse
|
3
|
Ródenas-González F, Blanco-Gandía MC, Miñarro J, Rodríguez-Arias M. Effects of ketosis on cocaine-induced reinstatement in male mice. Neurosci Lett 2022; 778:136619. [PMID: 35395325 DOI: 10.1016/j.neulet.2022.136619] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 03/31/2022] [Accepted: 04/03/2022] [Indexed: 10/18/2022]
Abstract
In recent years, the benefits of the ketogenic diet (KD) on different psychiatric disorders have been gaining attention, but the substance abuse field is still unexplored. Some studies have reported that palatable food can modulate the rewarding effects of cocaine, but the negative metabolic consequences rule out the recommendation of using it as a complementary treatment. Thus, the main aim of this study was to evaluate the effects of the KD on cocaine conditioned place preference (CPP) during acquisition, extinction, and reinstatement. 41 OF1 male mice were employed to assess the effects of the KD on a 10 mg/kg cocaine-induced CPP. Animals were divided into three groups: SD, KD, and KD after the Post-Conditioning test. The results revealed that, while access to the KD did not block CPP acquisition, it did significantly reduce the number of sessions required to extinguish the drug-associated memories and it blocked the priming-induced reinstatement.
Collapse
Affiliation(s)
- Francisco Ródenas-González
- Unidad de Investigación Psicobiología de las Drogodependencias, Departamento de Psicobiología, Facultad de Psicología, Universitat de Valencia, Valencia, Spain
| | - M Carmen Blanco-Gandía
- Departamento de Psicología y Sociología, Facultad de Ciencias Sociales y Humanas, Universidad de Zaragoza, Teruel, Spain
| | - José Miñarro
- Unidad de Investigación Psicobiología de las Drogodependencias, Departamento de Psicobiología, Facultad de Psicología, Universitat de Valencia, Valencia, Spain
| | - Marta Rodríguez-Arias
- Unidad de Investigación Psicobiología de las Drogodependencias, Departamento de Psicobiología, Facultad de Psicología, Universitat de Valencia, Valencia, Spain.
| |
Collapse
|
4
|
The Impact of Binge-Like Palatable Food Intake on the Endogenous Glucagon-Like Peptide-1 System in Female Rats. Behav Brain Res 2022; 428:113869. [PMID: 35378108 DOI: 10.1016/j.bbr.2022.113869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 03/08/2022] [Accepted: 03/29/2022] [Indexed: 11/21/2022]
Abstract
Binge eating involves consumption of large amounts of food and a loss of control over the amount consumed. The incidence of binge eating disorder is higher in females than males, hinting at important sex differences in binge eating behavior, but the neural underpinnings of binge eating still remain unresolved. Recent work in male rats has shown that a history of binge-like palatable food intake suppresses hindbrain expression of preproglucagon (PPG), the precursor for glucagon-like peptide-1 (GLP-1). Given the roles of GLP-1 in reducing feeding and food reward, this could be a mechanism underlying binge-like eating in rodents. However, whether similar effects occur in female rats is unknown. Here, we tested the hypothesis that a history of binge-like palatable food intake in female rats would reduce PPG expression in the nucleus tractus solitarius (NTS), a key central site of GLP-1 production. Female rats given access to vegetable shortening every fourth day (4D) engaged in binge-like feeding, demonstrated by consuming significantly more shortening during the first hour of fat access compared to counterparts with ad libitum (AL) fat access. After several weeks of fat access under these schedules, PPG and GLP-1 receptor (GLP-1R) expression were measured in the NTS and ileum. Surprisingly, and in contrast to previous findings in male rats, there were no significant differences in expression of PPG or GLP-1R in either site in 4D versus AL rats, nor were there effects on plasma GLP-1 levels. These findings highlight key differences in the effects of binge-like intake on the central GLP-1 system in female compared to male rats.
Collapse
|
5
|
Blanco-Gandia MC, Montagud-Romero S, Rodríguez-Arias M. Binge eating and psychostimulant addiction. World J Psychiatry 2021; 11:517-529. [PMID: 34631457 PMCID: PMC8475000 DOI: 10.5498/wjp.v11.i9.517] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 05/13/2021] [Accepted: 07/27/2021] [Indexed: 02/06/2023] Open
Abstract
Many of the various factors, characteristics, and variables involved in the addictive process can determine an individual’s vulnerability to develop drug addiction. Hedonic eating, based on pleasure rather than energy needs, modulates the same reward circuits, as do drugs of abuse. According to the last report of the World Health Organization, the worldwide obesity rate has more than doubled since 1980, reaching especially critical levels in children and young people, who are overexposed to high-fat, high-sugar, energy-dense foods. Over the past few decades, there has been an increase in the number of studies focused on how eating disorders can lead to the development of drug addiction and on the comorbidity that exists between the two disorders. Herein, we review the most recent research on the subject, focusing especially on animal models of binge eating disorders and drug addiction. The complex profile of patients with substance use and binge eating disorders requires an integrated response to dually diagnosed patients. Nutritional patterns should be considered an important variable in the treatment of substance use disorders, and future studies need to focus on specific treatments and interventions in individuals who show a special vulnerability to shift from one addiction to the other.
Collapse
Affiliation(s)
| | | | - Marta Rodríguez-Arias
- Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Valencia 46010, Spain
| |
Collapse
|
6
|
Ródenas-González F, Blanco-Gandía MDC, Pascual M, Molari I, Guerri C, López JM, Rodríguez-Arias M. A limited and intermittent access to a high-fat diet modulates the effects of cocaine-induced reinstatement in the conditioned place preference in male and female mice. Psychopharmacology (Berl) 2021; 238:2091-2103. [PMID: 33786639 DOI: 10.1007/s00213-021-05834-7] [Citation(s) in RCA: 3] [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: 06/18/2020] [Accepted: 03/22/2021] [Indexed: 12/01/2022]
Abstract
RATIONALE Palatable food and drugs of abuse activate common neurobiological pathways and numerous studies suggest that fat consumption increases vulnerability to drug abuse. In addition, preclinical reports show that palatable food may relieve craving for drugs, showing that an ad libitum access to a high-fat diet (HFD) can reduce cocaine-induced reinstatement. OBJECTIVE The main aim of the present study was to evaluate the effect of a limited and intermittent exposure to HFD administered during the extinction and reinstatement processes of a cocaine-induced conditioned place preference (CPP). METHODS Male and female mice underwent the 10 mg/kg cocaine CPP. From post-conditioning onwards, animals were divided into four groups: SD (standard diet); HFD-MWF with 2-h access to the HFD on Mondays, Wednesdays, and Fridays; HFD-24h, with 1-h access every day; and HFD-Ext with 1-h access to the HFD before each extinction session. RESULTS Our results showed that all HFD administrations blocked reinstatement in males, while only the HFD-MWF was able to inhibit reinstatement in females. In addition, HFD-Ext males needed fewer sessions to extinguish the preference, which suggests that administration of fat before being exposed to the environmental cues is effective to extinguish drug-related memories. HFD did not affect Oprμ gene expression but increased CB1r gene expression in the striatum in HFD-Ext males. CONCLUSIONS These results support that palatable food could act as an alternative reward to cocaine, accelerating extinction and blocking reinstatement, these effects being sex specific.
Collapse
Affiliation(s)
- Francisco Ródenas-González
- Unit of Research Psychobiology of Drug Dependence, Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Avda. Blasco Ibáñez, 21, 46010, Valencia, Spain
| | | | - María Pascual
- Unit of Research Psychobiology of Drug Dependence, Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Avda. Blasco Ibáñez, 21, 46010, Valencia, Spain
- Department of Molecular and Cellular Pathology of Alcohol, Principe Felipe Research Center, C/Eduardo Primo Yúfera 3, 46012, Valencia, Spain
- Department of Physiology, School of Medicine, Universitat de Valencia, Valencia, Spain
- Red Temática de Investigación Cooperativa en Salud (RETICS-Trastornos Adictivos), Instituto de Salud Carlos III, MICINN and FEDER, Madrid, Spain
| | - Irene Molari
- Unit of Research Psychobiology of Drug Dependence, Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Avda. Blasco Ibáñez, 21, 46010, Valencia, Spain
| | - Consuelo Guerri
- Department of Molecular and Cellular Pathology of Alcohol, Principe Felipe Research Center, C/Eduardo Primo Yúfera 3, 46012, Valencia, Spain
- Red Temática de Investigación Cooperativa en Salud (RETICS-Trastornos Adictivos), Instituto de Salud Carlos III, MICINN and FEDER, Madrid, Spain
| | - José Miñarro López
- Unit of Research Psychobiology of Drug Dependence, Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Avda. Blasco Ibáñez, 21, 46010, Valencia, Spain
- Red Temática de Investigación Cooperativa en Salud (RETICS-Trastornos Adictivos), Instituto de Salud Carlos III, MICINN and FEDER, Madrid, Spain
| | - Marta Rodríguez-Arias
- Unit of Research Psychobiology of Drug Dependence, Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Avda. Blasco Ibáñez, 21, 46010, Valencia, Spain.
- Red Temática de Investigación Cooperativa en Salud (RETICS-Trastornos Adictivos), Instituto de Salud Carlos III, MICINN and FEDER, Madrid, Spain.
| |
Collapse
|
7
|
Blanco-Gandía MDC, Ródenas-González F, Pascual M, Reguilón MD, Guerri C, Miñarro J, Rodríguez-Arias M. Ketogenic Diet Decreases Alcohol Intake in Adult Male Mice. Nutrients 2021; 13:nu13072167. [PMID: 34202492 PMCID: PMC8308435 DOI: 10.3390/nu13072167] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 06/19/2021] [Accepted: 06/22/2021] [Indexed: 01/26/2023] Open
Abstract
The classic ketogenic diet is a diet high in fat, low in carbohydrates, and well-adjusted proteins. The reduction in glucose levels induces changes in the body’s metabolism, since the main energy source happens to be ketone bodies. Recent studies have suggested that nutritional interventions may modulate drug addiction. The present work aimed to study the potential effects of a classic ketogenic diet in modulating alcohol consumption and its rewarding effects. Two groups of adult male mice were employed in this study, one exposed to a standard diet (SD, n = 15) and the other to a ketogenic diet (KD, n = 16). When a ketotic state was stable for 7 days, animals were exposed to the oral self-administration paradigm to evaluate the reinforcing and motivating effects of ethanol. Rt-PCR analyses were performed evaluating dopamine, adenosine, CB1, and Oprm gene expression. Our results showed that animals in a ketotic state displayed an overall decrease in ethanol consumption without changes in their motivation to drink. Gene expression analyses point to several alterations in the dopamine, adenosine, and cannabinoid systems. Our results suggest that nutritional interventions may be a useful complementary tool in treating alcohol-use disorders.
Collapse
Affiliation(s)
| | - Francisco Ródenas-González
- Unit of Research Psychobiology of Drug Dependence, Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Avda. Blasco Ibáñez, 21, 46010 Valencia, Spain; (F.R.-G.); (M.P.); (M.D.R.); (J.M.)
| | - María Pascual
- Unit of Research Psychobiology of Drug Dependence, Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Avda. Blasco Ibáñez, 21, 46010 Valencia, Spain; (F.R.-G.); (M.P.); (M.D.R.); (J.M.)
- Department of Molecular and Cellular Pathology of Alcohol, Principe Felipe Research Center, C/Eduardo Primo Yúfera 3, 46012 Valencia, Spain;
- Department of Physiology, School of Medicine, Universitat de Valencia, Avda. Blasco Ibáñez, 15, 46010 Valencia, Spain
| | - Marina Daiana Reguilón
- Unit of Research Psychobiology of Drug Dependence, Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Avda. Blasco Ibáñez, 21, 46010 Valencia, Spain; (F.R.-G.); (M.P.); (M.D.R.); (J.M.)
| | - Consuelo Guerri
- Department of Molecular and Cellular Pathology of Alcohol, Principe Felipe Research Center, C/Eduardo Primo Yúfera 3, 46012 Valencia, Spain;
| | - José Miñarro
- Unit of Research Psychobiology of Drug Dependence, Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Avda. Blasco Ibáñez, 21, 46010 Valencia, Spain; (F.R.-G.); (M.P.); (M.D.R.); (J.M.)
| | - Marta Rodríguez-Arias
- Unit of Research Psychobiology of Drug Dependence, Department of Psychobiology, Facultad de Psicología, Universitat de Valencia, Avda. Blasco Ibáñez, 21, 46010 Valencia, Spain; (F.R.-G.); (M.P.); (M.D.R.); (J.M.)
- Correspondence: ; Tel.: +34-963864637
| |
Collapse
|
8
|
Pairing Binge Drinking and a High-Fat Diet in Adolescence Modulates the Inflammatory Effects of Subsequent Alcohol Consumption in Mice. Int J Mol Sci 2021; 22:ijms22105279. [PMID: 34067897 PMCID: PMC8157004 DOI: 10.3390/ijms22105279] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2021] [Revised: 05/08/2021] [Accepted: 05/15/2021] [Indexed: 12/12/2022] Open
Abstract
Alcohol binge drinking (BD) and poor nutritional habits are two frequent behaviors among many adolescents that alter gut microbiota in a pro-inflammatory direction. Dysbiotic changes in the gut microbiome are observed after alcohol and high-fat diet (HFD) consumption, even before obesity onset. In this study, we investigate the neuroinflammatory response of adolescent BD when combined with a continuous or intermittent HFD and its effects on adult ethanol consumption by using a self-administration (SA) paradigm in mice. The inflammatory biomarkers IL-6 and CX3CL1 were measured in the striatum 24 h after BD, 3 weeks later and after the ethanol (EtOH) SA. Adolescent BD increased alcohol consumption in the oral SA and caused a greater motivation to seek the substance. Likewise, mice with intermittent access to HFD exhibited higher EtOH consumption, while the opposite effect was found in mice with continuous HFD access. Biochemical analyses showed that after BD and three weeks later, striatal levels of IL-6 and CX3CL1 were increased. In addition, in saline-treated mice, CX3CL1 was increased after continuous access to HFD. After oral SA procedure, striatal IL-6 was increased only in animals exposed to BD and HFD. In addition, striatal CX3CL1 levels were increased in all BD- and HFD-exposed groups. Overall, our findings show that adolescent BD and intermittent HFD increase adult alcohol intake and point to neuroinflammation as an important mechanism modulating this interaction.
Collapse
|
9
|
Converging vulnerability factors for compulsive food and drug use. Neuropharmacology 2021; 196:108556. [PMID: 33862029 DOI: 10.1016/j.neuropharm.2021.108556] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 03/29/2021] [Accepted: 04/03/2021] [Indexed: 12/12/2022]
Abstract
Highly palatable foods and substance of abuse have intersecting neurobiological, metabolic and behavioral effects relevant for understanding vulnerability to conditions related to food (e.g., obesity, binge eating disorder) and drug (e.g., substance use disorder) misuse. Here, we review data from animal models, clinical populations and epidemiological evidence in behavioral, genetic, pathophysiologic and therapeutic domains. Results suggest that consumption of highly palatable food and drugs of abuse both impact and conversely are regulated by metabolic hormones and metabolic status. Palatable foods high in fat and/or sugar can elicit adaptation in brain reward and withdrawal circuitry akin to substances of abuse. Intake of or withdrawal from palatable food can impact behavioral sensitivity to drugs of abuse and vice versa. A robust literature suggests common substrates and roles for negative reinforcement, negative affect, negative urgency, and impulse control deficits, with both highly palatable foods and substances of abuse. Candidate genetic risk loci shared by obesity and alcohol use disorders have been identified in molecules classically associated with both metabolic and motivational functions. Finally, certain drugs may have overlapping therapeutic potential to treat obesity, diabetes, binge-related eating disorders and substance use disorders. Taken together, data are consistent with the hypotheses that compulsive food and substance use share overlapping, interacting substrates at neurobiological and metabolic levels and that motivated behavior associated with feeding or substance use might constitute vulnerability factors for one another. This article is part of the special issue on 'Vulnerabilities to Substance Abuse'.
Collapse
|
10
|
Jones SR, Fordahl SC. Bingeing on High-Fat Food Enhances Evoked Dopamine Release and Reduces Dopamine Uptake in the Nucleus Accumbens. Obesity (Silver Spring) 2021; 29:721-730. [PMID: 33660412 PMCID: PMC8048651 DOI: 10.1002/oby.23122] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 12/15/2020] [Accepted: 12/17/2020] [Indexed: 11/24/2022]
Abstract
OBJECTIVE Binge-eating disorder (BED) disrupts dopamine neuron function, in part by altering dopamine transporter (DAT) activity. This study characterized the effects of high-fat bingeing on presynaptic dopamine terminals and tested the hypothesis that acute low-dose amphetamine would restore DAT function. METHODS C57BL/6 mice were given limited access (LimA) to a high-fat diet (2 h/d, 3 d/wk) or standard chow (control). After 6 weeks, ex vivo fast-scan cyclic voltammetry was used to characterize dopamine-terminal adaptations in the nucleus accumbens. Prior to undergoing fast-scan cyclic voltammetry, some mice from each group were given amphetamine (0.5 mg/kg intraperitoneally). RESULTS Escalation of high fat intake, termed bingeing, occurred in the LimA group and coincided with increased phasic dopamine release, reduced dopamine uptake rates, and increased dopamine receptor 2 (D2 ) autoreceptor function. Acute amphetamine selectively reversed dopamine uptake changes in the LimA group and restored the potency of amphetamine to inhibit uptake. CONCLUSIONS High-fat bingeing enhanced dopaminergic signaling in the nucleus accumbens by promoting phasic dopamine release and reducing clearance. This study's data show that amphetamine was efficacious in restoring impaired DAT function caused by high-fat bingeing but did not reduce dopamine release to normal. These presynaptic changes should be considered if amphetamine-like dopamine releasers are used as treatments for BED.
Collapse
Affiliation(s)
- Sara R. Jones
- Department of Physiology and PharmacologySchool of MedicineWake Forest UniversityWinston‐SalemNorth CarolinaUSA
| | - Steve C. Fordahl
- Department of NutritionUNC GreensboroGreensboroNorth CarolinaUSA
| |
Collapse
|
11
|
Angoa-Pérez M, Kuhn DM. Evidence for Modulation of Substance Use Disorders by the Gut Microbiome: Hidden in Plain Sight. Pharmacol Rev 2021; 73:571-596. [PMID: 33597276 PMCID: PMC7896134 DOI: 10.1124/pharmrev.120.000144] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The gut microbiome modulates neurochemical function and behavior and has been implicated in numerous central nervous system (CNS) diseases, including developmental, neurodegenerative, and psychiatric disorders. Substance use disorders (SUDs) remain a serious threat to the public well-being, yet gut microbiome involvement in drug abuse has received very little attention. Studies of the mechanisms underlying SUDs have naturally focused on CNS reward circuits. However, a significant body of research has accumulated over the past decade that has unwittingly provided strong support for gut microbiome participation in drug reward. β-Lactam antibiotics have been employed to increase glutamate transporter expression to reverse relapse-induced release of glutamate. Sodium butyrate has been used as a histone deacetylase inhibitor to prevent drug-induced epigenetic alterations. High-fat diets have been used to alter drug reward because of the extensive overlap of the circuitry mediating them. This review article casts these approaches in a different light and makes a compelling case for gut microbiome modulation of SUDs. Few factors alter the structure and composition of the gut microbiome more than antibiotics and a high-fat diet, and butyrate is an endogenous product of bacterial fermentation. Drugs such as cocaine, alcohol, opiates, and psychostimulants also modify the gut microbiome. Therefore, their effects must be viewed on a complex background of cotreatment-induced dysbiosis. Consideration of the gut microbiome in SUDs should have the beneficial effects of expanding the understanding of SUDs and aiding in the design of new therapies based on opposing the effects of abused drugs on the host's commensal bacterial community. SIGNIFICANCE STATEMENT: Proposed mechanisms underlying substance use disorders fail to acknowledge the impact of drugs of abuse on the gut microbiome. β-Lactam antibiotics, sodium butyrate, and high-fat diets are used to modify drug seeking and reward, overlooking the notable capacity of these treatments to alter the gut microbiome. This review aims to stimulate research on substance abuse-gut microbiome interactions by illustrating how drugs of abuse share with antibiotics, sodium butyrate, and fat-laden diets the ability to modify the host microbial community.
Collapse
Affiliation(s)
- Mariana Angoa-Pérez
- Research and Development Service, John D. Dingell VA Medical Center, and Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan
| | - Donald M Kuhn
- Research and Development Service, John D. Dingell VA Medical Center, and Department of Psychiatry and Behavioral Neurosciences, Wayne State University School of Medicine, Detroit, Michigan
| |
Collapse
|
12
|
Garman TS, Setlow B, Orsini CA. Effects of a high-fat diet on impulsive choice in rats. Physiol Behav 2021; 229:113260. [PMID: 33227243 DOI: 10.1016/j.physbeh.2020.113260] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 11/18/2020] [Indexed: 12/21/2022]
Abstract
INTRODUCTION Obesity and binge eating disorder are associated with high levels of impulsivity, but the causal role of eating and palatable food in these associations is unclear. Studies in rodents show that a high-fat diet can increase one aspect of impulsivity (impulsive action); it is less clear, however, whether a dissociable aspect of impulsivity (impulsive choice) is similarly affected. Hence, the aim of this study was to ascertain whether chronic exposure to a high-fat diet would alter impulsive choice. METHODS Male rats were maintained on either a high-fat or control chow diet for two weeks ad libitum. They then underwent equi-caloric food restriction for the duration of the experiment, with each group maintained on their respective diet. To measure impulsive choice, rats were trained on a delay discounting task (DDT) in which they made discrete choices between a lever that delivered a small food reward immediately and a lever that delivered a large food reward accompanied by systematically increasing delays. Upon reaching stable performance on the DDT, rats were given acute systemic injections of amphetamine prior to testing in the DDT to determine whether increased monoamine transmission affected impulsive choice differently in the two diet groups. Lastly, subjects were tested on a progressive ratio schedule of reinforcement to assess motivation for a sucrose reward. RESULTS There was no significant effect of the high-fat diet on impulsive choice. Further, amphetamine decreased choice of the large, delayed reward (increased impulsive choice) to the same extent in both groups. Exposure to the high-fat diet did, however, increase motivation to obtain a sucrose reward. CONCLUSIONS These experiments reveal that, under conditions that do not promote weight gain, a chronic high-fat diet does not affect impulsive choice in a delay discounting task. The data are surprising in light of findings showing that this same diet alters impulsive action, and highlight the necessity of further research to elucidate relationships between palatable food consumption and impulsivity.
Collapse
Affiliation(s)
| | - Barry Setlow
- Department of Neuroscience; Department of Psychiatry; McKnight Brain Institute; Center for Addiction Research and Education, University of Florida, Gainesville, FL 32610
| | - Caitlin A Orsini
- Department of Psychiatry; McKnight Brain Institute; Department of Psychology, Waggoner Center for Alcoholism and Addiction Research, The University of Texas at Austin, Austin, TX 78712.
| |
Collapse
|
13
|
Clasen MM, Riley AL, Davidson TL. Hippocampal-Dependent Inhibitory Learning and Memory Processes in the Control of Eating and Drug Taking. Curr Pharm Des 2020; 26:2334-2352. [PMID: 32026771 DOI: 10.2174/1381612826666200206091447] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Accepted: 12/11/2019] [Indexed: 12/11/2022]
Abstract
As manifestations of excessive and uncontrolled intake, obesity and drug addiction have generated much research aimed at identifying common neuroadaptations that could underlie both disorders. Much work has focused on changes in brain reward and motivational circuitry that can overexcite eating and drug-taking behaviors. We suggest that the regulation of both behaviors depends on balancing excitation produced by stimuli associated with food and drug rewards with the behavioral inhibition produced by physiological "satiety" and other stimuli that signal when those rewards are unavailable. Our main hypothesis is that dysregulated eating and drug use are consequences of diet- and drug-induced degradations in this inhibitory power. We first outline a learning and memory mechanism that could underlie the inhibition of both food and drug-intake, and we describe data that identifies the hippocampus as a brain substrate for this mechanism. We then present evidence that obesitypromoting western diets (WD) impair the operation of this process and generate pathophysiologies that disrupt hippocampal functioning. Next, we present parallel evidence that drugs of abuse also impair this same learning and memory process and generate similar hippocampal pathophysiologies. We also describe recent findings that prior WD intake elevates drug self-administration, and the implications of using drugs (i.e., glucagon-like peptide- 1 agonists) that enhance hippocampal functioning to treat both obesity and addiction are also considered. We conclude with a description of how both WD and drugs of abuse could initiate a "vicious-cycle" of hippocampal pathophysiology and impaired hippocampal-dependent behavioral inhibition.
Collapse
Affiliation(s)
- Matthew M Clasen
- Department of Psychology, Program in Neuroscience, Williams College, Williamstown, MA 01267, United States
| | - Anthony L Riley
- Department of Neuroscience, Center for Behavioral Neuroscience, American University, Washington, DC 20016, United States
| | - Terry L Davidson
- Department of Neuroscience, Center for Behavioral Neuroscience, American University, Washington, DC 20016, United States
| |
Collapse
|
14
|
López-Taboada I, González-Pardo H, Conejo NM. Western Diet: Implications for Brain Function and Behavior. Front Psychol 2020; 11:564413. [PMID: 33329193 PMCID: PMC7719696 DOI: 10.3389/fpsyg.2020.564413] [Citation(s) in RCA: 63] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 10/02/2020] [Indexed: 12/12/2022] Open
Abstract
The Western diet (WD) pattern characterized by high daily intake of saturated fats and refined carbohydrates often leads to obesity and overweight, and it has been linked to cognitive impairment and emotional disorders in both animal models and humans. This dietary pattern alters the composition of gut microbiota, influencing brain function by different mechanisms involving the gut-brain axis. In addition, long-term exposure to highly palatable foods typical of WD could induce addictive-like eating behaviors and hypothalamic-pituitary-adrenal (HPA) axis dysregulation associated with chronic stress, anxiety, and depression. In turn, chronic stress modulates eating behavior, and it could have detrimental effects on different brain regions such as the hippocampus, hypothalamus, amygdala, and several cortical regions. Moreover, obesity and overweight induce neuroinflammation, causing neuronal dysfunction. In this review, we summarize the current scientific evidence about the mechanisms and factors relating WD consumption with altered brain function and behavior. Possible therapeutic interventions and limitations are also discussed, aiming to tackle and prevent this current pandemic.
Collapse
Affiliation(s)
| | | | - Nélida María Conejo
- Laboratory of Neuroscience, Department of Psychology, Instituto de Neurociencias del Principado de Asturias (INEUROPA), University of Oviedo, Oviedo, Spain
| |
Collapse
|
15
|
Darcey VL, Serafine KM. Omega-3 Fatty Acids and Vulnerability to Addiction: Reviewing Preclinical and Clinical Evidence. Curr Pharm Des 2020; 26:2385-2401. [DOI: 10.2174/1381612826666200429094158] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2019] [Accepted: 04/06/2020] [Indexed: 01/05/2023]
Abstract
Omega-3 (N3) fatty acids are dietary nutrients that are essential for human health. Arguably, one of their most critical contributions to health is their involvement in the structure and function of the nervous system. N3 fatty acids accumulate in neuronal membranes through young adulthood, becoming particularly enriched in a brain region known to be the locus of cognitive control of behavior-the prefrontal cortex (PFC). The PFC undergoes a surge in development during adolescence, coinciding with a life stage when dietary quality and intake of N3 fatty acids tend to be suboptimal. Such low intake may impact neurodevelopment and normative development of cognitive functions suggested to be protective for the risk of subsequent substance and alcohol use disorders (UD). While multiple genetic and environmental factors contribute to risk for and resilience to substance and alcohol use disorders, mounting evidence suggests that dietary patterns early in life may also modulate cognitive and behavioral factors thought to elevate UD risk (e.g., impulsivity and reward sensitivity). This review aims to summarize the literature on dietary N3 fatty acids during childhood and adolescence and risk of executive/ cognitive or behavioral dysfunction, which may contribute to the risk of subsequent UD. We begin with a review of the effects of N3 fatty acids in the brain at the molecular to cellular levels–providing the biochemical mechanisms ostensibly supporting observed beneficial effects. We continue with a review of cognitive, behavioral and neurodevelopmental features thought to predict early substance and alcohol use in humans. This is followed by a review of the preclinical literature, largely demonstrating that dietary manipulation of N3 fatty acids contributes to behavioral changes that impact drug sensitivity. Finally, a review of the available evidence in human literature, suggesting an association between dietary N3 fatty and neurodevelopmental profiles associated with risk of adverse outcomes including UD. We conclude with a brief summary and call to action for additional research to extend the current understanding of the impact of dietary N3 fatty acids and the risk of drug and alcohol UD.
Collapse
Affiliation(s)
- Valerie L. Darcey
- Georgetown University, Interdisciplinary Program in Neuroscience, Washington DC, United States
| | - Katherine M. Serafine
- Department of Psychology, The University of Texas at El Paso, El Paso, TX 79968, United States
| |
Collapse
|
16
|
Blanco-Gandía MC, Miñarro J, Rodríguez-Arias M. Common Neural Mechanisms of Palatable Food Intake and Drug Abuse: Knowledge Obtained with Animal Models. Curr Pharm Des 2020; 26:2372-2384. [DOI: 10.2174/1381612826666200213123608] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 01/23/2020] [Indexed: 02/07/2023]
Abstract
Eating is necessary for survival, but it is also one of the great pleasures enjoyed by human beings.
Research to date shows that palatable food can be rewarding in a similar way to drugs of abuse, indicating
considerable comorbidity between eating disorders and substance-use disorders. Analysis of the common characteristics
of both types of disorder has led to a new wave of studies proposing a Gateway Theory of food as a vulnerability
factor that modulates the development of drug addiction. The homeostatic and hedonic mechanisms of
feeding overlap with some of the mechanisms implicated in drug abuse and their interaction plays a crucial role in
the development of drug addiction. Studies in animal models have shown how palatable food sensitizes the reward
circuit and makes individuals more sensitive to other substances of abuse, such as cocaine or alcohol. However,
when palatable food is administered continuously as a model of obesity, the consequences are different, and
studies provide controversial data. In the present review, we will cover the main homeostatic and hedonic mechanisms
that regulate palatable food intake behavior and will explain, using animal models, how different types of
diet and their intake patterns have direct consequences on the rewarding effects of psychostimulants and ethanol.
Collapse
Affiliation(s)
- Maria C. Blanco-Gandía
- Department of Psychology and Sociology, University of Zaragoza, C/ Ciudad Escolar s/n, 44003, Teruel, Spain
| | - José Miñarro
- Unit of Research Psychobiology of Drug Dependence, Department of Psychobiology, Facultad de Psicologia, Universitat de Valencia, Avda. Blasco Ibanez, 21, 46010 Valencia, Spain
| | - Marta Rodríguez-Arias
- Unit of Research Psychobiology of Drug Dependence, Department of Psychobiology, Facultad de Psicologia, Universitat de Valencia, Avda. Blasco Ibanez, 21, 46010 Valencia, Spain
| |
Collapse
|
17
|
Mukherjee A, Hum A, Gustafson TJ, Mietlicki-Baase EG. Binge-like palatable food intake in rats reduces preproglucagon in the nucleus tractus solitarius. Physiol Behav 2020; 219:112830. [PMID: 32061682 DOI: 10.1016/j.physbeh.2020.112830] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 02/01/2020] [Accepted: 02/05/2020] [Indexed: 01/08/2023]
Abstract
Binge eating involves eating larger than normal quantities of food within a discrete period of time. The neurohormonal controls governing binge-like palatable food intake are not well understood. Glucagon-like peptide-1 (GLP-1), a hormone produced peripherally in the intestine and centrally in the nucleus tractus solitarius (NTS), reduces food intake. Given that the NTS plays a critical role in integrating peripheral and central signals relevant for food intake, as well as the role of GLP-1 in motivated feeding, we tested the hypothesis that expression of the GLP-1 precursor preproglucagon (PPG) would be reduced in the NTS of rats with a history of binge-like palatable food intake. Adult male rats received access to fat for 1 h shortly before lights off, either every day (Daily, D) or only 3d/week (Intermittent, INT). INT rats ate significantly more fat than did D rats in sessions where all rats had fat access. After ~8.5 weeks of diet maintenance, we measured plasma GLP-1 as well as NTS PPG and GLP-1 receptor expression. INT rats had significantly lower NTS PPG mRNA expression compared to D rats. However, plasma GLP-1 was significantly increased in the INT group versus D rats. No significant differences were observed in NTS GLP-1 receptor expression. We also measured plasma insulin levels, fasted blood glucose, and plasma corticosterone but no differences were detected between groups. These results support the hypothesis that binge-like eating reduces NTS GLP-1 expression, and furthermore, demonstrate divergent impacts of binge-like eating on peripheral (plasma) versus central GLP-1.
Collapse
Affiliation(s)
- Ashmita Mukherjee
- Psychology, University at Buffalo, State University of New York, Buffalo, NY 14260, USA
| | - Avery Hum
- Biological Sciences, University at Buffalo, State University of New York, Buffalo, NY 14260, USA
| | - Tyler J Gustafson
- Exercise and Nutrition Sciences, University at Buffalo, State University of New York, G10G Farber Hall, Buffalo, NY 14214, USA
| | - Elizabeth G Mietlicki-Baase
- Exercise and Nutrition Sciences, University at Buffalo, State University of New York, G10G Farber Hall, Buffalo, NY 14214, USA; Center for Ingestive Behavior Research, University at Buffalo, State University of New York, Buffalo, NY 14260, USA.
| |
Collapse
|
18
|
Smail-Crevier RL, Maracle AC, Wash SI, Olmstead MC. Binge-like intake of sucrose reduces the rewarding value of sucrose in adult rats. Physiol Behav 2018; 194:420-429. [DOI: 10.1016/j.physbeh.2018.06.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Revised: 06/18/2018] [Accepted: 06/18/2018] [Indexed: 12/16/2022]
|
19
|
Increased ethanol consumption after interruption of fat bingeing. PLoS One 2018; 13:e0194431. [PMID: 29590149 PMCID: PMC5874030 DOI: 10.1371/journal.pone.0194431] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Accepted: 03/03/2018] [Indexed: 12/21/2022] Open
Abstract
There is a marked comorbidity between alcohol abuse and eating disorders, especially in the young population. We have previously reported that bingeing on fat during adolescence increases the rewarding effects of ethanol (EtOH). The aim of the present work was to study if vulnerability to EtOH persists after cessation of binge eating. OF1 mice binged on fat (HFB: high-fat binge) during adolescence (PND 25-43) and were tested for 15 days after the last access to HFB (on PND 59) using the self-administration paradigm, the conditioned place preference (CPP) and locomotor sensitization to ethanol. Our results showed that after 15 days of cessation of fat ingestion, mice increased their consumption of ethanol and showed greater motivation to obtain ethanol. On the other hand, no effects were observed in the CPP, while an increased locomotor response to ethanol was detected. The present results confirm and extend our previous study demonstrating that the compulsive intake of fat induces long-lasting effects on the reward system that lead to an increased consumption of EtOH.
Collapse
|
20
|
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.
Collapse
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.
| |
Collapse
|
21
|
Blanco-Gandía MC, Montagud-Romero S, Aguilar MA, Miñarro J, Rodríguez-Arias M. Housing conditions modulate the reinforcing properties of cocaine in adolescent mice that binge on fat. Physiol Behav 2018; 183:18-26. [DOI: 10.1016/j.physbeh.2017.10.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2017] [Revised: 10/11/2017] [Accepted: 10/12/2017] [Indexed: 12/22/2022]
|
22
|
Kosheleff AR, Araki J, Tsan L, Chen G, Murphy NP, Maidment NT, Ostlund SB. Junk Food Exposure Disrupts Selection of Food-Seeking Actions in Rats. Front Psychiatry 2018; 9:350. [PMID: 30166974 PMCID: PMC6106797 DOI: 10.3389/fpsyt.2018.00350] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2018] [Accepted: 07/11/2018] [Indexed: 01/10/2023] Open
Abstract
There is growing evidence that repeated consumption of highly palatable, nutritionally poor "junk food" diets can produce deficits in cognition and behavioral control. We explored whether long-term junk-food diet exposure disrupts rats' ability to make adaptive choices about which foods to pursue based on (1) expected reward value (outcome devaluation test) and (2) cue-evoked reward expectations (Pavlovian-to-instrumental test). Rats were initially food restricted and trained on two distinct response-outcome contingencies (e.g., left press chocolate pellets, and right press sweetened condensed milk) and stimulus-outcome contingencies (e.g., white noise chocolate pellets, and clicker sweetened condensed milk). They were then given 6 weeks of unrestricted access to regular chow alone (controls) or chow and either 1 or 24 h access to junk food per day. Subsequent tests of decision making revealed that rats in both junk-food diet groups were impaired in selecting actions based on either expected food value or the presence of food-paired cues. These data demonstrate that chronic junk food consumption can disrupt the processes underlying adaptive control over food-seeking behavior. We suggest that the resulting dysregulation of food seeking may contribute to overeating and obesity.
Collapse
Affiliation(s)
- Alisa R Kosheleff
- Department of Psychiatry and Biobehavioral Sciences, Hatos Center for Neuropharmacology, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, CA, United States
| | - Jingwen Araki
- Department of Psychiatry and Biobehavioral Sciences, Hatos Center for Neuropharmacology, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, CA, United States
| | - Linda Tsan
- Department of Psychiatry and Biobehavioral Sciences, Hatos Center for Neuropharmacology, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, CA, United States
| | - Grace Chen
- Department of Psychiatry and Biobehavioral Sciences, Hatos Center for Neuropharmacology, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, CA, United States
| | - Niall P Murphy
- Department of Psychiatry and Biobehavioral Sciences, Hatos Center for Neuropharmacology, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, CA, United States
| | - Nigel T Maidment
- Department of Psychiatry and Biobehavioral Sciences, Hatos Center for Neuropharmacology, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, CA, United States
| | - Sean B Ostlund
- Department of Psychiatry and Biobehavioral Sciences, Hatos Center for Neuropharmacology, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, Los Angeles, CA, United States.,Department of Anesthesiology and Perioperative Care, University of California, Irvine, Irvine, CA, United States
| |
Collapse
|
23
|
Preston KE, Corwin RL, Bader JO, Crimmins SL. Relatively enriched housing conditions delay binge onset but do not attenuate binge size. Physiol Behav 2017; 184:196-204. [PMID: 29155246 DOI: 10.1016/j.physbeh.2017.11.018] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2017] [Revised: 10/11/2017] [Accepted: 11/14/2017] [Indexed: 12/16/2022]
Abstract
Housing and enrichment conditions are essential factors to consider when using animal models of behavior, as they can alter the behavior that is under investigation. The goal of this study was to determine the impact of the relatively enriched environment recommended by current animal care guidelines on development and maintenance of binge-type behavior in rats, using the limited access (LA) binge model. Non-food-deprived rats were divided into two groups, enriched and nonenriched, with all rats housed in shoebox cages. Bedding, nesting material, toys, and a solid floor were provided only to the enriched group to create a state of relative enrichment, or RE, compared to the nonenriched conditions historically used in the LA model. Enriched and nonenriched groups were further divided into control and experimental groups. Control rats received access to an optional source of fat (vegetable shortening) for 30min each day (daily access) while experimental rats received 30-min optional fat access on Monday, Wednesday, and Friday only (intermittent access). The four groups were designated C-E (Control-Enriched), C-NE (Control-Nonenriched), I-E (Intermittent-Enriched), and I-NE (Intermittent-Nonenriched). Bingeing in the LA model is established when a group with intermittent access (i.e., the I-E or I-NE group) consumes significantly more vegetable shortening during the limited access period than a group with daily access (i.e., the C-E or C-NE group). Access sessions continued for 8weeks under these conditions, at which time the housing conditions of the I-E and I-NE groups were reversed for an additional 8weeks of access sessions. Intakes of the C-E and C-NE groups were similar and data from these two groups were combined. Relative to this Combined Control Group (CCG), the I-NE group began bingeing in week 3 while the I-E group binged during weeks 6 and 8. Following the reversal at the beginning of week 9, the newly enriched I-NE group ceased bingeing in week 9 but resumed bingeing in weeks 10-16. The newly nonenriched I-E group continued bingeing through the remainder of the study. Intakes of the I-E and I-NE groups were not significantly different at any time during the study. These results indicate that RE delays binge onset; that is, RE increases the time between the first fat access session and the first occurrence of bingeing. However, RE does not significantly alter the amount of fat consumed during binge sessions. Furthermore, addition of RE to a nonenriched group of animals (I-NE) does not reverse established binge behavior. Thus it appears that regardless of enrichment condition, intermittent access to vegetable shortening induces greater consumption of fat than does daily access. However, it is clear that a certain level of austerity in housing conditions is required for rapid development of lasting binge-type eating to occur. In addition, results suggest that it is unlikely that enrichment, to the degree provided in this study, can prevent or reverse binge-type eating in rats.
Collapse
Affiliation(s)
- Kerry E Preston
- William Beaumont Army Medical Center, Dept of Clinical Investigation, 5005 N Piedras St, El Paso, TX 79920, United States.
| | - Rebecca L Corwin
- The Pennsylvania State University, Nutritional Sciences Dept, 110 Chandlee Laboratory, University Park, PA 16802, United States
| | - Julia O Bader
- William Beaumont Army Medical Center, Dept of Clinical Investigation, 5005 N Piedras St, El Paso, TX 79920, United States
| | - Stephen L Crimmins
- William Beaumont Army Medical Center, Dept of Clinical Investigation, 5005 N Piedras St, El Paso, TX 79920, United States
| |
Collapse
|
24
|
Rupprecht LE, Smith TT, Donny EC, Sved AF. Self-administered nicotine differentially impacts body weight gain in obesity-prone and obesity-resistant rats. Physiol Behav 2017; 176:71-75. [PMID: 28189503 DOI: 10.1016/j.physbeh.2017.02.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 01/17/2017] [Accepted: 02/06/2017] [Indexed: 11/28/2022]
Abstract
Obesity and tobacco smoking represent the largest challenges to public health, but the causal relationship between nicotine and obesity is poorly understood. Nicotine suppresses body weight gain, a factor impacting smoking initiation and the failure to quit, particularly among obese smokers. The impact of nicotine on body weight regulation in obesity-prone and obesity-resistant populations consuming densely caloric diets is unknown. In the current experiment, body weight gain of adult male rats maintained on a high energy diet (31.8% kcal from fat) distributed into obesity-prone (OP), obesity-resistant (OR) and an intermediate group, which was placed on standard rodent chow (Chow). These rats were surgically implanted with intravenous catheters and allowed to self-administer nicotine (0 or 60μg/kg/infusion, a standard self-administration dose) in 1-h sessions for 20 consecutive days. Self-administered nicotine significantly suppressed body weight gain but not food intake in OP and Chow rats. Self-administered nicotine had no effect on body weight gain in OR rats. These data suggest that: 1) OR rats are also resistant to nicotine-induced suppression of body weight gain; and 2) nicotine may reduce levels of obesity in a subset of smokers prone to obesity.
Collapse
Affiliation(s)
- Laura E Rupprecht
- Center for Neuroscience at the University of Pittsburgh, A210A Langley Hall, Fifth and Ruskin Avenues, Pittsburgh, PA 15260, United States
| | - Tracy T Smith
- University of Pittsburgh, Department of Psychology, 4119 Sennott Square, 210 South Bouquet Street, Pittsburgh, PA 15260, United States
| | - Eric C Donny
- University of Pittsburgh, Department of Psychology, 4119 Sennott Square, 210 South Bouquet Street, Pittsburgh, PA 15260, United States
| | - Alan F Sved
- Center for Neuroscience at the University of Pittsburgh, A210A Langley Hall, Fifth and Ruskin Avenues, Pittsburgh, PA 15260, United States; University of Pittsburgh, Department of Psychology, 4119 Sennott Square, 210 South Bouquet Street, Pittsburgh, PA 15260, United States; University of Pittsburgh, Department of Neuroscience, A210A Langley Hall, Fifth and Ruskin Avenues, Pittsburgh, PA 15260, United States.
| |
Collapse
|
25
|
Blanco-Gandía MC, Cantacorps L, Aracil-Fernández A, Montagud-Romero S, Aguilar MA, Manzanares J, Valverde O, Miñarro J, Rodríguez-Arias M. Effects of bingeing on fat during adolescence on the reinforcing effects of cocaine in adult male mice. Neuropharmacology 2017; 113:31-44. [DOI: 10.1016/j.neuropharm.2016.09.020] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 09/12/2016] [Accepted: 09/21/2016] [Indexed: 01/27/2023]
|
26
|
Barnea R, Bekker L, Zifman N, Marco A, Yadid G, Weller A. Trait and state binge eating predispose towards cocaine craving. Addict Biol 2017; 22:163-171. [PMID: 26419743 DOI: 10.1111/adb.12315] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Revised: 08/27/2015] [Accepted: 08/28/2015] [Indexed: 12/28/2022]
Abstract
Binge eating (BE) and drug seeking share similar behavioral features, including loss of control over consumption and compulsive seeking of the craved substance. Previous studies in animal models have demonstrated a complex interaction between 'state' BE, produced by intermittent access to a palatable diet, and 'trait' BE, a phenotypical proneness towards overeating. In the present study, we examined the relationship between state and trait BE and cocaine seeking. We used Otsuka Long Evans Tokushima Fatty rats, a genetic model for obesity that demonstrates BE-like behavior, and Long Evans Tokushima Otsuka controls. They received a schedule of limited access to a palatable diet (3 days/week or 5 days/week access to Ensure for a month). Next, they underwent cocaine self-administration training (1 mg/kg, 1 hour/day for 10 days) followed by extinction sessions (7 days). We found that the degree of BE-like behavior and the state and trait BE combination predicted cocaine craving patterns. Lower levels of dopamine D2 receptors in the prefrontal cortex were correlated with increased drug craving. Moreover, restricted access to an attractive diet was found to be a risk factor for heightened cocaine craving, particularly in trait binge eaters, as rats on the 3 days/week access schedule persistently failed to cease cocaine seeking throughout extinction. Hence, we postulate a joint role of state and trait BE as risk factors for heightened cocaine craving.
Collapse
Affiliation(s)
- Royi Barnea
- Gonda (Goldschmied) Brain Research Center; Bar Ilan University; Ramat Gan Israel
- Faculty of Life Sciences; Bar Ilan University; Ramat Gan Israel
| | - Liza Bekker
- Gonda (Goldschmied) Brain Research Center; Bar Ilan University; Ramat Gan Israel
- Psychology Department; Bar Ilan University; Ramat Gan Israel
| | - Noa Zifman
- Gonda (Goldschmied) Brain Research Center; Bar Ilan University; Ramat Gan Israel
- Faculty of Life Sciences; Bar Ilan University; Ramat Gan Israel
| | - Asaf Marco
- Gonda (Goldschmied) Brain Research Center; Bar Ilan University; Ramat Gan Israel
- Faculty of Life Sciences; Bar Ilan University; Ramat Gan Israel
| | - Gal Yadid
- Gonda (Goldschmied) Brain Research Center; Bar Ilan University; Ramat Gan Israel
- Faculty of Life Sciences; Bar Ilan University; Ramat Gan Israel
| | - Aron Weller
- Gonda (Goldschmied) Brain Research Center; Bar Ilan University; Ramat Gan Israel
- Psychology Department; Bar Ilan University; Ramat Gan Israel
| |
Collapse
|
27
|
Jenney CB, Alexander DN, Jones BC, Unger EL, Grigson PS. Preweaning iron deficiency increases non-contingent responding during cocaine self-administration in rats. Physiol Behav 2016; 167:282-288. [PMID: 27640134 PMCID: PMC5663288 DOI: 10.1016/j.physbeh.2016.09.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2016] [Revised: 08/12/2016] [Accepted: 09/12/2016] [Indexed: 11/27/2022]
Abstract
Iron deficiency (ID) is the most prevalent single-nutrient deficiency worldwide. There is evidence that ID early in development (preweaning in rat) causes irreversible neurologic, behavioral, and motor development deficits. Many of these effects have been attributed to damage to dopamine systems, including ID-induced changes in transporter and receptor numbers in the striatum and nucleus accumbens. These mesolimbic dopaminergic neurons are, in part, responsible for mediating reward and thus play a key role in addiction. However, there has been relatively little investigation into the behavioral effects of ID on drug addiction. In 2002, we found that rats made ID from weaning (postnatal day 21) and throughout the experiment acquired cocaine self-administration significantly more slowly than controls and failed to increase responding when the dose of the drug was decreased. In the present study, we assessed addiction for self-administered cocaine in rats with a history of preweaning ID only during postnatal days 4 through 21, and iron replete thereafter. The results showed that while ID did not affect the number of cocaine infusions or the overall addiction-like behavior score, ID rats scored higher on a measure of continued responding for drug than did iron replete controls. This increase in responding, however, was less goal-directed as ID rats also responded more quickly to the non-rewarded manipulandum than did control rats. Thus, while ID early in infancy did not significantly increase addiction-like behaviors for cocaine in this small study, the pattern of data suggests a possible underlying learning or performance impairment. Future studies will be needed to elucidate the exact neuro-behavioral deficits that lead to the increase in indiscriminate responding for drug in rats with a history of perinatal ID.
Collapse
Affiliation(s)
- Christopher B Jenney
- Neural and Behavioral Sciences, Penn State Hershey College of Medicine, The Pennsylvania State University, United States
| | - Danielle N Alexander
- Neural and Behavioral Sciences, Penn State Hershey College of Medicine, The Pennsylvania State University, United States
| | - Byron C Jones
- Department of Biobehavioral Health, The Pennsylvania State University, United States
| | - Erica L Unger
- Department of Biobehavioral Health, The Pennsylvania State University, United States
| | - Patricia S Grigson
- Neural and Behavioral Sciences, Penn State Hershey College of Medicine, The Pennsylvania State University, United States.
| |
Collapse
|
28
|
Weissenberger S, Klicperova-Baker M, Zimbardo P, Schonova K, Akotia D, Kostal J, Goetz M, Raboch J, Ptacek R. ADHD and Present Hedonism: time perspective as a potential diagnostic and therapeutic tool. Neuropsychiatr Dis Treat 2016; 12:2963-2971. [PMID: 27895485 PMCID: PMC5118029 DOI: 10.2147/ndt.s116721] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
The article draws primarily from the behavioral findings (mainly psychiatric and psychological observations) and points out the important relationships between attention-deficit/hyperactivity disorder (ADHD) symptoms and time orientation. Specifically, the authors argue that there is a significant overlap between the symptoms of ADHD and Present Hedonism. Present Hedonism is defined by Zimbardo's time perspective theory and assessed by Zimbardo Time Perspective Inventory. Developmental data on Present Hedonism of males and females in the Czech population sample (N=2201) are also presented. The hypothesis of relationship between ADHD and Present Hedonism is mainly derived from the prevalence of addictive behavior (mainly excessive Internet use, alcohol abuse, craving for sweets, fatty foods, and fast foods), deficits in social learning, and increased aggressiveness both in ADHD and in the population scoring high on Present Hedonism in the Zimbardo Time Perspective Inventory. We conclude that Zimbardo's time perspective offers both: 1) a potential diagnostic tool - the Zimbardo Time Perspective Inventory, particularly its Present Hedonism scale, and 2) a promising preventive and/or therapeutic approach by the Time Perspective Therapy. Time Perspective Therapy has so far been used mainly to treat past negative trauma (most notably, posttraumatic stress disorder); however, it also has value as a potential therapeutic tool for possible behavioral compensation of ADHD.
Collapse
Affiliation(s)
| | - M Klicperova-Baker
- Institute of Psychology, Academy of Sciences of the Czech Republic, Praha, Czech Republic
| | - P Zimbardo
- Department of Psychology, Stanford University, Stanford, CA, USA
| | - K Schonova
- First Medical Faculty, Charles University
| | - D Akotia
- First Medical Faculty, Charles University
| | - J Kostal
- Institute of Psychology, Academy of Sciences of the Czech Republic, Praha, Czech Republic
| | - M Goetz
- Second Faculty of Medicine, Department of Child Psychiatry, Charles University, Motol University Hospital, Praha, Czech Republic
| | - J Raboch
- First Medical Faculty, Charles University
| | - R Ptacek
- First Medical Faculty, Charles University
| |
Collapse
|
29
|
Jung C, Rabinowitsch A, Lee WT, Zheng D, de Vaca SC, Carr KD. Effects of food restriction on expression of place conditioning and biochemical correlates in rat nucleus accumbens. Psychopharmacology (Berl) 2016; 233:3161-72. [PMID: 27376947 PMCID: PMC4982816 DOI: 10.1007/s00213-016-4360-4] [Citation(s) in RCA: 8] [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: 12/18/2015] [Accepted: 06/09/2016] [Indexed: 12/17/2022]
Abstract
RATIONALE When ad libitum-fed rats undergo cocaine place preference conditioning (CPP) but are switched to food restriction for testing, CPP becomes resistant to extinction and correlates with phosphorylation of α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid (AMPA) receptor GluA1 at Ser845 in nucleus accumbens (NAc) core. OBJECTIVES This study tested whether food restriction increases persistence of morphine CPP and conditioned place aversions (CPA) induced by LiCl and naloxone-precipitated morphine withdrawal. MATERIALS AND METHODS Ad libitum-fed rats were conditioned with morphine (6.0 mg/kg, i.p.), LiCl (50.0/75.0 mg/kg, i.p.), or naloxone (1.0 mg/kg, s.c.) 22 h post-morphine (20.0 mg/kg, s.c.). Half of the subjects were then switched to food restriction. Daily testing resumed 3 weeks later, and brains were harvested when one diet group met extinction criterion. Western analyses probed for pSer845-GluA1, pERK1, and pERK2 in NAc. RESULTS Food restriction increased persistence of morphine CPP and preference scores correlated with pSer845-GluA1 in NAc core and shell. LiCl CPA was curtailed by food restriction, yet pSer845-GluA1 and pERK2 were elevated in NAc core of food-restricted rats. Food restriction increased persistence of naloxone CPA and elevated pSer845-GluA1 in NAc core and shell, and aversion scores were negatively correlated with pERK1 and pERK2 in NAc core. CONCLUSIONS These results suggest that food restriction prolongs responsiveness to environmental contexts paired with subjective effects of both morphine and morphine withdrawal. A mechanistic scheme, attributing these effects to upregulation of pSer845-GluA1, but subject to override by CPA-specific, pERK2-mediated extinction learning, is explored to accommodate opposite effects of food restriction on LiCl and naloxone CPA.
Collapse
Affiliation(s)
- Caroline Jung
- Department of Psychiatry, New York University School of Medicine, Alexandria Center for Life Sciences, 450 East 29th Street, New York, NY, 10016, USA
| | - Ariana Rabinowitsch
- Department of Psychiatry, New York University School of Medicine, Alexandria Center for Life Sciences, 450 East 29th Street, New York, NY, 10016, USA
| | - Wei Ting Lee
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, Alexandria Center for Life Sciences, 450 East 29th Street, New York, NY, 10016, USA
| | - Danielle Zheng
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, Alexandria Center for Life Sciences, 450 East 29th Street, New York, NY, 10016, USA
| | - Soledad Cabeza de Vaca
- Department of Psychiatry, New York University School of Medicine, Alexandria Center for Life Sciences, 450 East 29th Street, New York, NY, 10016, USA
| | - Kenneth D Carr
- Department of Psychiatry, New York University School of Medicine, Alexandria Center for Life Sciences, 450 East 29th Street, New York, NY, 10016, USA.
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, Alexandria Center for Life Sciences, 450 East 29th Street, New York, NY, 10016, USA.
| |
Collapse
|
30
|
Eating high fat chow, but not drinking sucrose or saccharin, enhances the development of sensitization to the locomotor effects of cocaine in adolescent female rats. Behav Pharmacol 2015; 26:321-5. [PMID: 25485647 DOI: 10.1097/fbp.0000000000000114] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Eating high fat chow accelerates the development of sensitization to cocaine-induced locomotion in female rats. It is not known whether consumption of sucrose or saccharin also increases sensitivity to the behavioral effects of cocaine or whether continuous (or intermittent) access to these feeding conditions is necessary to change sensitivity. Adolescent female Sprague-Dawley rats were assigned to one of seven feeding conditions from postnatal day 25 through to postnatal day 60. The rats either ate high fat (60% kcal from fat) chow and drank water or ate standard (17% kcal from fat) chow and drank either water, a 10% sucrose solution, or a 0.1% saccharin solution. The rats either had continuous access to high fat chow, sucrose, or saccharin, or had intermittent access (i.e. 2 days/week) to these substances, with access to water and standard chow on other days. As compared with standard chow, continuous (but not intermittent) access to high fat chow enhanced the development of sensitization to cocaine-induced (1-17.8 mg/kg) locomotion; drinking sucrose or saccharin (continuous or intermittent access) did not alter the development of sensitization to cocaine-induced locomotion. The impact of feeding condition on the behavioral effects of cocaine varies between sexes and across dietary composition.
Collapse
|
31
|
Wojnicki FHE, Johnson DS, Charny G, Corwin RLW. Development of bingeing in rats altered by a small operant requirement. Physiol Behav 2015; 152:112-8. [PMID: 26375821 PMCID: PMC4633377 DOI: 10.1016/j.physbeh.2015.09.009] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 08/25/2015] [Accepted: 09/09/2015] [Indexed: 12/28/2022]
Abstract
Previous studies have shown that providing an optional food for a brief period of time to non-food deprived rats on an intermittent basis in the home cage engenders significantly more intake (binge-type behavior) than when the optional food is provided for a brief period on a daily basis. Experiment 1 examined the effects of placing a small operant response requirement on access to an optional food (vegetable shortening) on the establishment of binge-type behavior. Experiment 2 examined the effects of different schedules of reinforcement, a period of abstinence from shortening, and 24h of food deprivation on established binge-type behavior. In Experiment 1 the group of rats with 30-min access to shortening on an intermittent basis in their home cages (IC) consumed significantly more shortening than the group with 30-min daily access in the home cage (DC). The group with 30-min intermittent access in an operant chamber (IO group) earned significantly more reinforcers than the group with 30-min daily access in an operant chamber (DO). In Experiment 2, the IO group earned significantly more reinforcers than the DO group regardless of the response cost, the period of shortening abstinence, and overnight food deprivation. These results demonstrate that while intermittent access generates binge-type eating, the size of the binge (intake) can be altered by different contingency arrangements.
Collapse
Affiliation(s)
- F H E Wojnicki
- Pennsylvania State University, Nutritional Sciences, 110 Chandlee Laboratory, University Park, PA 16802, United States
| | - D S Johnson
- University of Pennsylvania, School of Medicine, Department of Pathology and Laboratory Medicine, Virology, Philadelphia, PA 19104, United States
| | - G Charny
- Womack Army Medical Center, Department of Emergency Medicine, 2817 Reilly Street, Fort Bragg, NC 28310, United States
| | - R L W Corwin
- Pennsylvania State University, Nutritional Sciences, 110 Chandlee Laboratory, University Park, PA 16802, United States.
| |
Collapse
|
32
|
Tacelosky DM, Alexander DN, Morse M, Hajnal A, Berg A, Levenson R, Grigson PS. Low expression of D2R and Wntless correlates with high motivation for heroin. Behav Neurosci 2015; 129:744-55. [PMID: 26501177 DOI: 10.1037/bne0000104] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Drug overdose now exceeds car accidents as the leading cause of accidental death in the United States. Of those drug overdoses, a large percentage of the deaths are due to heroin and/or pharmaceutical overdose, specifically misuse of prescription opioid analgesics. It is imperative, then, that we understand the mechanisms that lead to opioid abuse and addiction. The rewarding actions of opioids are mediated largely by the mu-opioid receptor (MOR), and signaling by this receptor is modulated by various interacting proteins. The neurotransmitter dopamine also contributes to opioid reward, and opioid addiction has been linked to reduced expression of dopamine D2 receptors (D2R) in the brain. That said, it is not known if alterations in the expression of these proteins relate to drug exposure and/or to the "addiction-like" behavior exhibited for the drug. Here, we held total drug self-administration constant across acquisition and showed that reduced expression of the D2R and the MOR interacting protein, Wntless, in the medial prefrontal cortex was associated with greater addiction-like behavior for heroin in general and with a greater willingness to work for the drug in particular. In contrast, reduced expression of the D2R in the nucleus accumbens and hippocampus was correlated with greater seeking during signaled nonavailability of the drug. Taken together, these data link reduced expression of both the D2R and Wntless to the explicit motivation for the drug rather than to differences in total drug intake per se.
Collapse
Affiliation(s)
- Diana M Tacelosky
- Department of Pharmacology, College of Medicine, Pennsylvania State University
| | - Danielle N Alexander
- Department of Neural and Behavioral Sciences, College of Medicine, Pennsylvania State University
| | - Megan Morse
- Department of Pharmacology, College of Medicine, Pennsylvania State University
| | - Andras Hajnal
- Department of Neural and Behavioral Sciences, College of Medicine, Pennsylvania State University
| | - Arthur Berg
- Division of Biostatistics and Bioinformatics, Department of Public Health Sciences, College of Medicine, Pennsylvania State University
| | - Robert Levenson
- Department of Pharmacology, College of Medicine, Pennsylvania State University
| | - Patricia S Grigson
- Department of Neural and Behavioral Sciences, College of Medicine, Pennsylvania State University
| |
Collapse
|
33
|
Jenney CB, Petko J, Ebersole B, Njatcha CVN, Uzamere TO, Alexander DN, Grigson PS, Levenson R. Early avoidance of a heroin-paired taste-cue and subsequent addiction-like behavior in rats. Brain Res Bull 2015; 123:61-70. [PMID: 26494018 DOI: 10.1016/j.brainresbull.2015.10.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2015] [Revised: 10/13/2015] [Accepted: 10/14/2015] [Indexed: 11/26/2022]
Abstract
The ability to predict individual vulnerability to substance abuse would allow for a better understanding of the progression of the disease and development of better methods for prevention and/or early intervention. Here we use drug-induced devaluation of a saccharin cue in an effort to predict later addiction-like behavior in a model akin to that used by Deroche-Gamonet et al. (2004) and seek to link such vulnerability to changes in expression of various mu opioid receptor and D2 receptor-interacting proteins in brain. The results show that the greatest heroin-induced suppression of intake of a saccharin cue is associated with the greatest vulnerability to later addiction-like behavior and to differences in the expression of WLS, β-catenin, and NCS-1 in brain compared to rats that exhibited the least suppression of intake of the heroin-paired cue and/or saline controls. Finally, because the self-administration model employed produced no significant differences in drug intake between groups, overall, the resultant changes in protein expression can be more closely linked to individual differences in motivation for drug.
Collapse
Affiliation(s)
- Christopher B Jenney
- Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, PA 17033, United States.
| | - Jessica Petko
- Department of Pharmacology, Penn State College of Medicine, Hershey, PA 17033, United States.
| | - Brittany Ebersole
- Department of Pharmacology, Penn State College of Medicine, Hershey, PA 17033, United States.
| | - Christian V Nzinkeu Njatcha
- Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, PA 17033, United States.
| | - Teddy O Uzamere
- Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, PA 17033, United States.
| | - Danielle N Alexander
- Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, PA 17033, United States.
| | - Patricia S Grigson
- Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, PA 17033, United States.
| | - Robert Levenson
- Department of Pharmacology, Penn State College of Medicine, Hershey, PA 17033, United States.
| |
Collapse
|
34
|
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.
Collapse
|
35
|
Collins GT, Chen Y, Tschumi C, Rush EL, Mensah A, Koek W, France CP. Effects of consuming a diet high in fat and/or sugar on the locomotor effects of acute and repeated cocaine in male and female C57BL/6J mice. Exp Clin Psychopharmacol 2015; 23:228-37. [PMID: 26237320 PMCID: PMC4523901 DOI: 10.1037/pha0000019] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Drug abuse and obesity are serious public health problems. Dopamine plays a central role in mediating the reinforcing effects of drugs and food. Prolonged use of drugs is known to alter the function and/or sensitivity of many neurotransmitter systems, including dopamine; however, the impact of consuming foods high in fat and/or sugar is less clear. These studies characterized the locomotor effects of acute and repeated cocaine in male and female C57BL/6J mice consuming 1 of 4 diets: (a) standard chow + water; (b) standard chow + 10% sucrose solution; (c) high-fat chow + water; or (d) high-fat chow + 10% sucrose solution. The acute locomotor effects of cocaine (3.2-32.0 mg/kg) were evaluated 4 weeks after initiating dietary conditions; the effects of repeated cocaine administration were evaluated after 5, 6, 7, and 12 weeks. During acute tests, mice consuming a diet high in fat and/or sucrose exhibited greater locomotor responses to cocaine than mice consuming standard chow and water, regardless of sex. Although diet-induced enhancements persisted across repeated cocaine testing, locomotor sensitization developed more rapidly in females drinking sucrose (and consuming either standard or high-fat chow) than in females consuming standard chow and water. In addition to providing evidence that consuming a diet high in fat and/or sugar enhances abuse-related effects of cocaine in ways that might increase vulnerability to abuse cocaine, these studies identified a potentially important sex-related difference in the interaction between nutrition and cocaine effects, with the impacts of sucrose consumption being greater in females than in males.
Collapse
Affiliation(s)
- Gregory T Collins
- Department of Pharmacology, University of Texas Health Science Center at San Antonio
| | - Yu Chen
- Department of Pharmacology, University of Texas Health Science Center at San Antonio
| | - Chris Tschumi
- Department of Pharmacology, University of Texas Health Science Center at San Antonio
| | - Elise L Rush
- Department of Pharmacology, University of Texas Health Science Center at San Antonio
| | - Ayele Mensah
- Department of Pharmacology, University of Texas Health Science Center at San Antonio
| | - Wouter Koek
- Department of Pharmacology, University of Texas Health Science Center at San Antonio
| | - Charles P France
- Department of Pharmacology, University of Texas Health Science Center at San Antonio
| |
Collapse
|
36
|
Serafine KM, Bentley TA, Kilborn DJ, Koek W, France CP. Drinking sucrose or saccharin enhances sensitivity of rats to quinpirole-induced yawning. Eur J Pharmacol 2015; 764:529-536. [PMID: 26189020 DOI: 10.1016/j.ejphar.2015.07.036] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Revised: 07/14/2015] [Accepted: 07/15/2015] [Indexed: 12/31/2022]
Abstract
Diet can impact sensitivity of rats to some of the behavioral effects of drugs acting on dopamine systems. The current study tested whether continuous access to sucrose is necessary to increase yawning induced by the dopamine receptor agonist quinpirole, or if intermittent access is sufficient. These studies also tested whether sensitivity to quinpirole-induced yawning increases in rats drinking the non-caloric sweetener saccharin. Dose-response curves (0.0032-0.32 mg/kg) for quinpirole-induced yawning were determined once weekly in rats with free access to standard chow and either continuous access to water, 10% sucrose solution, or 0.1% saccharin solution, or intermittent access to sucrose or saccharin (i.e., 2 days per week with access to water on other days). Cumulative doses of quinpirole increased then decreased yawning, resulting in an inverted U-shaped dose-response curve. Continuous or intermittent access to sucrose enhanced sensitivity to quinpirole-induced yawning. Continuous, but not intermittent, access to saccharin also enhanced sensitivity to quinpirole-induced yawning. In all groups, pretreatment with the selective D3 receptor antagonist PG01037 shifted the ascending limb of the quinpirole dose-response curve to the right, while pretreatment with the selective D2 receptor antagonist L-741,626 shifted the descending limb to the right. These results suggest that even intermittent consumption of diets containing highly palatable substances (e.g. sucrose) alters sensitivity to drugs acting on dopamine systems in a manner that could be important in vulnerability to abuse drugs.
Collapse
Affiliation(s)
- Katherine M Serafine
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, Mail Code 7764, San Antonio, TX 78229, USA
| | - Todd A Bentley
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, Mail Code 7764, San Antonio, TX 78229, USA
| | - Dylan J Kilborn
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, Mail Code 7764, San Antonio, TX 78229, USA
| | - Wouter Koek
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, Mail Code 7764, San Antonio, TX 78229, USA; Department of Psychiatry, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, Mail Code 7764, San Antonio, TX 78229, USA
| | - Charles P France
- Department of Pharmacology, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, Mail Code 7764, San Antonio, TX 78229, USA; Department of Psychiatry, University of Texas Health Science Center at San Antonio, 7703 Floyd Curl Drive, Mail Code 7764, San Antonio, TX 78229, USA.
| |
Collapse
|
37
|
Alonso-Alonso M, Woods SC, Pelchat M, Grigson PS, Stice E, Farooqi S, Khoo CS, Mattes RD, Beauchamp GK. Food reward system: current perspectives and future research needs. Nutr Rev 2015; 73:296-307. [PMID: 26011903 PMCID: PMC4477694 DOI: 10.1093/nutrit/nuv002] [Citation(s) in RCA: 125] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
This article reviews current research and cross-disciplinary perspectives on the neuroscience of food reward in animals and humans, examines the scientific hypothesis of food addiction, discusses methodological and terminology challenges, and identifies knowledge gaps and future research needs. Topics addressed herein include the role of reward and hedonic aspects in the regulation of food intake, neuroanatomy and neurobiology of the reward system in animals and humans, responsivity of the brain reward system to palatable foods and drugs, translation of craving versus addiction, and cognitive control of food reward. The content is based on a workshop held in 2013 by the North American Branch of the International Life Sciences Institute.
Collapse
Affiliation(s)
- Miguel Alonso-Alonso
- M. Alonso-Alonso is with the Center for the Study of Nutrition Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA. S.C. Woods is with the Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, Cincinnati, Ohio, USA. M. Pelchat and G.K. Beauchamp are with the Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA. P.S. Grigson is with the Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, Pennsylvania, USA. E. Stice is with the Department of Psychology, University of Texas at Austin, Austin, Texas, USA. S. Farooqi is with the Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, United Kingdom. C.S. Khoo is with the North American Branch of the International Life Sciences Institute, Washington, DC, USA. R.D. Mattes is with the Department of Nutrition Science, Purdue University, West Lafayette, Indiana, USA.
| | - Stephen C Woods
- M. Alonso-Alonso is with the Center for the Study of Nutrition Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA. S.C. Woods is with the Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, Cincinnati, Ohio, USA. M. Pelchat and G.K. Beauchamp are with the Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA. P.S. Grigson is with the Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, Pennsylvania, USA. E. Stice is with the Department of Psychology, University of Texas at Austin, Austin, Texas, USA. S. Farooqi is with the Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, United Kingdom. C.S. Khoo is with the North American Branch of the International Life Sciences Institute, Washington, DC, USA. R.D. Mattes is with the Department of Nutrition Science, Purdue University, West Lafayette, Indiana, USA
| | - Marcia Pelchat
- M. Alonso-Alonso is with the Center for the Study of Nutrition Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA. S.C. Woods is with the Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, Cincinnati, Ohio, USA. M. Pelchat and G.K. Beauchamp are with the Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA. P.S. Grigson is with the Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, Pennsylvania, USA. E. Stice is with the Department of Psychology, University of Texas at Austin, Austin, Texas, USA. S. Farooqi is with the Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, United Kingdom. C.S. Khoo is with the North American Branch of the International Life Sciences Institute, Washington, DC, USA. R.D. Mattes is with the Department of Nutrition Science, Purdue University, West Lafayette, Indiana, USA
| | - Patricia Sue Grigson
- M. Alonso-Alonso is with the Center for the Study of Nutrition Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA. S.C. Woods is with the Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, Cincinnati, Ohio, USA. M. Pelchat and G.K. Beauchamp are with the Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA. P.S. Grigson is with the Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, Pennsylvania, USA. E. Stice is with the Department of Psychology, University of Texas at Austin, Austin, Texas, USA. S. Farooqi is with the Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, United Kingdom. C.S. Khoo is with the North American Branch of the International Life Sciences Institute, Washington, DC, USA. R.D. Mattes is with the Department of Nutrition Science, Purdue University, West Lafayette, Indiana, USA
| | - Eric Stice
- M. Alonso-Alonso is with the Center for the Study of Nutrition Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA. S.C. Woods is with the Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, Cincinnati, Ohio, USA. M. Pelchat and G.K. Beauchamp are with the Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA. P.S. Grigson is with the Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, Pennsylvania, USA. E. Stice is with the Department of Psychology, University of Texas at Austin, Austin, Texas, USA. S. Farooqi is with the Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, United Kingdom. C.S. Khoo is with the North American Branch of the International Life Sciences Institute, Washington, DC, USA. R.D. Mattes is with the Department of Nutrition Science, Purdue University, West Lafayette, Indiana, USA
| | - Sadaf Farooqi
- M. Alonso-Alonso is with the Center for the Study of Nutrition Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA. S.C. Woods is with the Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, Cincinnati, Ohio, USA. M. Pelchat and G.K. Beauchamp are with the Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA. P.S. Grigson is with the Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, Pennsylvania, USA. E. Stice is with the Department of Psychology, University of Texas at Austin, Austin, Texas, USA. S. Farooqi is with the Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, United Kingdom. C.S. Khoo is with the North American Branch of the International Life Sciences Institute, Washington, DC, USA. R.D. Mattes is with the Department of Nutrition Science, Purdue University, West Lafayette, Indiana, USA
| | - Chor San Khoo
- M. Alonso-Alonso is with the Center for the Study of Nutrition Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA. S.C. Woods is with the Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, Cincinnati, Ohio, USA. M. Pelchat and G.K. Beauchamp are with the Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA. P.S. Grigson is with the Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, Pennsylvania, USA. E. Stice is with the Department of Psychology, University of Texas at Austin, Austin, Texas, USA. S. Farooqi is with the Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, United Kingdom. C.S. Khoo is with the North American Branch of the International Life Sciences Institute, Washington, DC, USA. R.D. Mattes is with the Department of Nutrition Science, Purdue University, West Lafayette, Indiana, USA
| | - Richard D Mattes
- M. Alonso-Alonso is with the Center for the Study of Nutrition Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA. S.C. Woods is with the Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, Cincinnati, Ohio, USA. M. Pelchat and G.K. Beauchamp are with the Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA. P.S. Grigson is with the Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, Pennsylvania, USA. E. Stice is with the Department of Psychology, University of Texas at Austin, Austin, Texas, USA. S. Farooqi is with the Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, United Kingdom. C.S. Khoo is with the North American Branch of the International Life Sciences Institute, Washington, DC, USA. R.D. Mattes is with the Department of Nutrition Science, Purdue University, West Lafayette, Indiana, USA
| | - Gary K Beauchamp
- M. Alonso-Alonso is with the Center for the Study of Nutrition Medicine, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts, USA. S.C. Woods is with the Department of Psychiatry and Behavioral Neuroscience, University of Cincinnati, Cincinnati, Ohio, USA. M. Pelchat and G.K. Beauchamp are with the Monell Chemical Senses Center, Philadelphia, Pennsylvania, USA. P.S. Grigson is with the Department of Neural and Behavioral Sciences, Penn State College of Medicine, Hershey, Pennsylvania, USA. E. Stice is with the Department of Psychology, University of Texas at Austin, Austin, Texas, USA. S. Farooqi is with the Wellcome Trust-MRC Institute of Metabolic Science, University of Cambridge, Cambridge, United Kingdom. C.S. Khoo is with the North American Branch of the International Life Sciences Institute, Washington, DC, USA. R.D. Mattes is with the Department of Nutrition Science, Purdue University, West Lafayette, Indiana, USA
| |
Collapse
|
38
|
High versus low fat/sugar food affects the behavioral, but not the cortisol response of marmoset monkeys in a conditioned-place-preference task. Physiol Behav 2015; 139:442-8. [DOI: 10.1016/j.physbeh.2014.11.065] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2014] [Revised: 11/20/2014] [Accepted: 11/21/2014] [Indexed: 11/15/2022]
|
39
|
Colechio EM, Imperio CG, Grigson PS. Once is too much: conditioned aversion develops immediately and predicts future cocaine self-administration behavior in rats. Behav Neurosci 2014; 128:207-16. [PMID: 24773440 DOI: 10.1037/a0036264] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Rats emit aversive taste reactivity (TR) behavior (i.e., gapes) following intraoral delivery of a cocaine-paired taste cue and greater conditioned aversive TR at the end of training predicts greater drug-seeking and taking. Here, we examined the development of this conditioned aversive TR behavior on a trial-by-trial basis in an effort to determine when the change in behavior occurs and whether early changes in this behavior can be used to predict later drug taking. The results show that conditioned aversive TR to a cocaine-paired cue occurs very early in training (i.e., following as few as 1-2 taste-drug pairings) and, importantly, that it can be used to predict later drug seeking and drug taking in rats.
Collapse
Affiliation(s)
- Elizabeth M Colechio
- Department of Neural and Behavioral Sciences, The Pennsylvania State University College of Medicine
| | - Caesar G Imperio
- Department of Neural and Behavioral Sciences, The Pennsylvania State University College of Medicine
| | - Patricia S Grigson
- Department of Neural and Behavioral Sciences, The Pennsylvania State University College of Medicine
| |
Collapse
|
40
|
Rodent models for compulsive alcohol intake. Alcohol 2014; 48:253-64. [PMID: 24731992 DOI: 10.1016/j.alcohol.2014.03.001] [Citation(s) in RCA: 118] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 03/07/2014] [Accepted: 03/12/2014] [Indexed: 11/22/2022]
Abstract
Continued seeking and drinking of alcohol despite adverse legal, health, economic, and societal consequences is a central hallmark of human alcohol use disorders. This compulsive drive for alcohol, defined by resistance to adverse and deleterious consequences, represents a major challenge when attempting to treat alcoholism clinically. Thus, there has long been interest in developing pre-clinical rodent models for the compulsive drug use that characterizes drug addiction. Here, we review recent studies that have attempted to model compulsive aspects of alcohol and cocaine intake in rodents, and consider technical and conceptual issues that need to be addressed when trying to recapitulate compulsive aspects of human addiction. Aversion-resistant alcohol intake has been examined by pairing intake or seeking with the bitter tastant quinine or with footshock, and exciting recent work has used these models to identify neuroadaptations in the amygdala, cortex, and striatal regions that promote compulsive intake. Thus, rodent models do seem to reflect important aspects of compulsive drives that sustain human addiction, and will likely provide critical insights into the molecular and circuit underpinnings of aversion-resistant intake as well as novel therapeutic interventions for compulsive aspects of addiction.
Collapse
|
41
|
Viral over-expression of D1 dopamine receptors in the prefrontal cortex increase high-risk behaviors in adults: comparison with adolescents. Psychopharmacology (Berl) 2014; 231:1615-26. [PMID: 24408208 PMCID: PMC3969417 DOI: 10.1007/s00213-013-3399-8] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 12/06/2013] [Indexed: 02/06/2023]
Abstract
RATIONALE Adolescents are often described as "lacking brakes" resulting in an increase in several behaviors associated with risk for addiction. Prefrontal cortex dopamine and cortico-limbic interaction play an important role in addiction, and we have previously shown that the dopamine D1 receptor is elevated on prelimbic prefrontal output neurons in adolescent rats. We hypothesized that a constellation of risk-related behaviors is mediated by prefrontal output neuron expression of D1. OBJECTIVES We aimed to determine the role of the dopamine D1 receptor in behavioral and neural correlates of risk for addiction that are often observed in adolescents. Therefore, high-risk behaviors as well as subcortical D2 receptor expression were investigated in adult animals with experimentally elevated D1 on prefrontal glutamatergic neurons. METHODS A lentiviral vector that selectively expressed the D1 receptor within glutamate neurons was injected in the prelimbic prefrontal cortex of adult male rats. Place conditioning to cocaine, alcohol, and nicotine, as well as delay discounting, novelty preferences, anxiety, cocaine self-administration, and sucrose preferences were assessed. RESULTS Virally mediated D1 over-expression in adults leads to stronger drug-cue associations and greater consumption of sweet solutions, elevates bias towards immediate satisfaction rather than delaying gratification, decreases anxiety, and causes rats to work harder for and take more cocaine. Furthermore, elevated cortical D1 reduces D2 receptors in the accumbens (a putative risk marker). CONCLUSIONS Together, these data suggest a common mechanism for increased motivational drive to seek and consume substances with hedonic value, consistent with adolescent addictive processes.
Collapse
|
42
|
Davis JF, Tracy AL, Schurdak JD, Magrisso IJ, Grayson BE, Seeley RJ, Benoit SC. Roux en Y gastric bypass increases ethanol intake in the rat. Obes Surg 2014; 23:920-30. [PMID: 23440511 DOI: 10.1007/s11695-013-0884-4] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Roux en Y gastric bypass (RYGB) surgery is currently the most effective therapy employed to treat obesity and its associated complications. In addition to weight loss and resolution of metabolic syndromes, such as diabetes, the RYGB procedure has been reported to increase alcohol consumption in humans. Using an outbred rodent model, we demonstrate that RYGB increases postsurgical ethanol consumption, that this effect cannot be explained solely by postsurgical weight loss and that it is independent of presurgical body weight or dietary composition. Altered ethanol metabolism and postsurgical shifts in release of ghrelin were also unable to account for changes in alcohol intake. Further investigation of the potential physiological factors underlying this behavioral effect identified altered patterns of gene expression in brain regions associated with reward following RYGB surgery. These findings have important clinical implications as they demonstrate that RYGB surgery leads directly to increased alcohol intake in otherwise alcohol nonpreferring rat and induces neurobiological changes in brain circuits that mediate a variety of appetitive behaviors.
Collapse
Affiliation(s)
- Jon F Davis
- Department of Psychiatry and Behavioral Neuroscience, Metabolic Diseases Institute, University of Cincinnati, Cincinnati, OH, USA.
| | | | | | | | | | | | | |
Collapse
|
43
|
Ersche KD, Stochl J, Woodward JM, Fletcher PC. The skinny on cocaine: insights into eating behavior and body weight in cocaine-dependent men. Appetite 2013; 71:75-80. [PMID: 23920064 PMCID: PMC3863945 DOI: 10.1016/j.appet.2013.07.011] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2013] [Revised: 07/25/2013] [Accepted: 07/26/2013] [Indexed: 12/20/2022]
Abstract
There is a general assumption that weight loss associated with cocaine use reflects its appetite suppressing properties. We sought to determine whether this was justified by characterizing, in detail, alterations in dietary food intake and body composition in actively using cocaine-dependent individuals. We conducted a cross-sectional case-control comparison of 65 male volunteers from the local community, half of whom satisfied the DSM-IV-TR criteria for cocaine dependence (n=35) while the other half had no personal or family history of a psychiatric disorder, including substance abuse (n=30). Assessments were made of eating behavior and dietary food intake, estimation of body composition, and measurement of plasma leptin. Although cocaine users reported significantly higher levels of dietary fat and carbohydrates as well as patterns of uncontrolled eating, their fat mass was significantly reduced compared with their non-drug using peers. Levels of leptin were associated with fat mass, and with the duration of stimulant use. Tobacco smoking status or concomitant use of medication did not affect the significance of the results. Weight changes in cocaine users reflect fundamental perturbations in fat regulation. These are likely to be overlooked in clinical practice but may produce significant health problems when cocaine use is discontinued during recovery.
Collapse
Affiliation(s)
- Karen D Ersche
- University of Cambridge, Department of Psychiatry, Cambridge CB2 0SZ, UK; University of Cambridge, Behavioural and Clinical Neuroscience Institute, Cambridge CB2 0SZ, UK.
| | | | | | | |
Collapse
|
44
|
Morganstern I, Lukatskaya O, Moon SH, Guo WR, Shaji J, Karatayev O, Leibowitz SF. Stimulation of nicotine reward and central cholinergic activity in Sprague-Dawley rats exposed perinatally to a fat-rich diet. Psychopharmacology (Berl) 2013; 230:509-24. [PMID: 23836027 PMCID: PMC4006699 DOI: 10.1007/s00213-013-3178-6] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2012] [Accepted: 06/04/2013] [Indexed: 10/26/2022]
Abstract
RATIONALE While clinical studies show maternal consumption of palatable fat-rich diets during pregnancy to negatively impact the children's behaviors and increase their vulnerability to drug abuse, the precise behavioral and neurochemical mechanisms mediating these phenomena have yet to be examined. OBJECTIVE The study examined in rats whether gestational exposure to a high-fat diet (HFD) can increase the offspring's propensity to use nicotine and whether disturbances in central nicotinic cholinergic signaling accompany this behavioral effect. METHODS Rat offspring exposed perinatally to a HFD or chow diet were characterized in terms of their nicotine self-administration behavior in a series of operant response experiments and the activity of acetylcholinesterase (AChE) and density of nicotinic ACh receptors (nAChRs) in different brain areas. RESULT Perinatal HFD compared to chow exposure increased nicotine-self administration behavior during fixed ratio and dose-response testing and caused an increase in breakpoint using progressive ratio testing, while nicotine seeking in response to nicotine prime-induced reinstatement was reduced. This behavioral change induced by the HFD was associated with a significant reduction in activity of AChE in the midbrain, hypothalamus, and striatum and increased density of β2-nAChRs in the ventral tegmental area and substantia nigra and of α7-nAChRs in the lateral and ventromedial hypothalamus. CONCLUSIONS Perinatal exposure to a HFD increases the vulnerability of the offspring to excessive nicotine use by enhancing its reward potential, and these behavioral changes are accompanied by a stimulation of nicotinic cholinergic signaling in mesostriatal and hypothalamic brain areas important for reinforcement and consummatory behavior.
Collapse
Affiliation(s)
- Irene Morganstern
- Laboratory of Behavioral Neurobiology, Rockefeller University, New York, New York 10065, USA
| | - Olga Lukatskaya
- Laboratory of Behavioral Neurobiology, Rockefeller University, New York, New York 10065, USA
| | - Sang-Ho Moon
- Laboratory of Behavioral Neurobiology, Rockefeller University, New York, New York 10065, USA
| | - Wei-Ran Guo
- Laboratory of Behavioral Neurobiology, Rockefeller University, New York, New York 10065, USA
| | - Jane Shaji
- Laboratory of Behavioral Neurobiology, Rockefeller University, New York, New York 10065, USA
| | - Olga Karatayev
- Laboratory of Behavioral Neurobiology, Rockefeller University, New York, New York 10065, USA
| | - Sarah F. Leibowitz
- Laboratory of Behavioral Neurobiology, Rockefeller University, New York, New York 10065, USA
| |
Collapse
|
45
|
Levy A, Salamon A, Tucci M, Limebeer CL, Parker LA, Leri F. Co-sensitivity to the incentive properties of palatable food and cocaine in rats; implications for co-morbid addictions. Addict Biol 2013; 18:763-73. [PMID: 22340075 DOI: 10.1111/j.1369-1600.2011.00433.x] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Several lines of evidence suggest that there may be a shared vulnerability to acquire behaviors motivated by strong incentive stimuli. Non-food restricted male Sprague-Dawley rats (n = 78) underwent place conditioning with Oreos, and were subsequently tested on cocaine self-administration (SA) on fixed and progressive ratios, as well as extinction and reinstatement by cocaine primes and by consumption of Oreos. Although there was a group preference for the Oreo-paired compartment, at the individual level some rats (69%) displayed a preference and others did not. In cocaine SA, 'preference' rats achieved higher break points on a progressive ratio, and displayed greater responding during extinction and cocaine-induced reinstatement. Within the context of this study, Oreo-cocaine cross-reinstatement was not observed. In a control study, rats (n = 29) conditioned with a less palatable food (rice cakes) also displayed individual differences in place preference, but not on subsequent cocaine tests. These findings indicate that there is a relationship between incentive learning promoted by palatable foods and by cocaine. This supports the hypothesis that co-morbid food-drug addictions may result from a shared vulnerability to acquire behaviors motivated by strong incentives.
Collapse
Affiliation(s)
- AnneMarie Levy
- Department of Psychology, University of Guelph, Ontario, Canada
| | | | | | | | | | | |
Collapse
|
46
|
Tellez LA, Ferreira JG, Medina S, Land BB, DiLeone RJ, de Araujo IE. Flavor-independent maintenance, extinction, and reinstatement of fat self-administration in mice. Biol Psychiatry 2013; 73:851-9. [PMID: 23587200 PMCID: PMC3646714 DOI: 10.1016/j.biopsych.2013.02.028] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Revised: 02/12/2013] [Accepted: 02/13/2013] [Indexed: 11/29/2022]
Abstract
BACKGROUND Mounting evidence suggests that overeating may be conceptualized within the same behavioral and neurobiological framework as drug addiction. One potentially important difference between overeating versus drug abuse refers to the sensory stimulation of oral receptors by palatable foods, a feature that may be required for reinforcement during intake. Likewise, postingestive effects and caloric content of food also contribute to reinforcing behavior and might influence the development of compulsive eating behavior. The purpose of the current study was to establish whether intragastric self-administration of fat emulsions, that is, bypassing the oral cavity, recapitulates some of the behavioral and neurobiological hallmarks of psychostimulant self-administration. METHODS We used behavioral assays in mice to assess acquisition, maintenance, extinction, and reinstatement of intragastric self-administration of lipid emulsions to determine the extent to which postoral fat self-administration recapitulates psychostimulant self-administration. Striatal dopamine efflux during behavioral tasks was determined by brain microdialysis coupled to chromatographic-electrochemical analyses. RESULTS We show that in direct analogy to drug self-administration, 1) decreases in fat dose concentration were met with compensatory increases in response rates aimed at maintaining constant hourly caloric intake; 2) rates of responding markedly increased during both extinction and progressive ratio schedules of reinforcement; and 3) elevations in striatal dopamine levels observed during maintenance were markedly attenuated during extinction sessions, only to be restored on reinstatement. CONCLUSIONS Our data thus support the contention that stimulation of oral receptors by caloric foods may not be required for the expression of certain addiction-related neurobehavioral markers.
Collapse
Affiliation(s)
- Luis A. Tellez
- The John B Pierce Laboratory, New Haven CT, USA,Department of Psychiatry, Yale University School of Medicine, New Haven CT, USA
| | - Jozelia G. Ferreira
- The John B Pierce Laboratory, New Haven CT, USA,Department of Psychiatry, Yale University School of Medicine, New Haven CT, USA
| | - Sara Medina
- The John B Pierce Laboratory, New Haven CT, USA
| | - Benjamin B. Land
- Department of Psychiatry, Yale University School of Medicine, New Haven CT, USA
| | - Ralph J. DiLeone
- Department of Psychiatry, Yale University School of Medicine, New Haven CT, USA,Department of Neurobiology, Yale University School of Medicine, New Haven CT, USA
| | - Ivan E. de Araujo
- The John B Pierce Laboratory, New Haven CT, USA,Department of Psychiatry, Yale University School of Medicine, New Haven CT, USA,Corresponding Author: Ivan E de Araujo, DPhil, The John B. Pierce Laboratory & Yale University School of Medicine, 290 Congress Avenue, New Haven CT 06519, USA, Phone: +1 (203) 5629901 x204, Fax: +1 (203) 6244950,
| |
Collapse
|
47
|
A novel model of chronic sleep restriction reveals an increase in the perceived incentive reward value of cocaine in high drug-taking rats. Pharmacol Biochem Behav 2013; 109:8-15. [PMID: 23603033 DOI: 10.1016/j.pbb.2013.04.010] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Revised: 03/28/2013] [Accepted: 04/12/2013] [Indexed: 01/27/2023]
Abstract
Substance abuse and sleep deprivation are major problems in our society. Clinical studies suggest that measures of poor sleep quality effectively predict relapse to substance abuse. Previously, our laboratory has shown that acute sleep deprivation increases the rate and efficiency (i.e., the goal-directed nature of responding) of cocaine self-administration using a progressive ratio (PR) schedule of reinforcement. However, the problem of sleep deprivation in our nation is largely one of chronicity. Therefore, the current study used a rodent model of chronic sleep restriction more akin to that experienced by humans (approximately 25% reduction in baseline sleep over the course of 8 days) to assess the impact of chronic sleep deprivation on cocaine-seeking and cocaine-taking behaviors in rats early during acquisition of self-administration. While low drug-taking rats were unaffected by chronic sleep restriction, high drug-takers in the chronic sleep restriction (CSR) group exhibited enhanced fixed ratio (FR) responding by the fourth day of FR training and significantly higher PR breakpoints than their non-sleep restriction (NSR) counterparts. This study is the first to directly assess the impact of chronic sleep deprivation on drug self-administration. These results show that chronic sleep deprivation early during acquisition of self-administration has a significant effect on the perceived incentive reward value of cocaine in high drug-takers, as indicated by both increased FR responding and an increased willingness to work for drug. Thus, it is important to be mindful of such factors in clinical settings designed for treatment of addiction and relapse prevention.
Collapse
|
48
|
Wojnicki FHE, Babbs RK, Corwin RLW. Environments predicting intermittent shortening access reduce operant performance but not home cage binge size in rats. Physiol Behav 2013; 116-117:35-43. [PMID: 23535243 DOI: 10.1016/j.physbeh.2013.03.015] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2012] [Revised: 01/17/2013] [Accepted: 03/14/2013] [Indexed: 01/01/2023]
Abstract
When non-food-deprived rats are given brief access to vegetable shortening (a semi-solid fat used in baked products) on an intermittent basis (Monday, Wednesday, Friday), they consume significantly more and emit more operant responses for shortening than a separate group of rats given brief access to shortening every day. Since both groups are traditionally housed in the same room, it is possible that the environmental cues associated with placing shortening in the cages (e.g., investigator in room, cages opening and closing, etc.) provide predictable cues to the daily group, but unpredictable cues to the intermittent group. The present study examined the effects of providing predictable environmental cues to an isolated intermittent group in order to examine the independent contributions of intermittency and predictability on intake and operant performance. Two groups of rats were housed in the same room, with one group provided 30-min intermittent (INT) access and the second group provided 30-min daily access (D) to shortening. A third group (ISO) of rats was housed in a room by themselves in which all environmental cues associated with intermittent shortening availability were highly predictable. After five weeks of home cage shortening access, all rats were then exposed to several different operant schedules of reinforcement. The INT and ISO groups consumed significantly more shortening in the home cage than the D group. In contrast, the INT group earned significantly more reinforcers than both the ISO and D groups under all but one of the reinforcement schedules, while ISO and D did not differ. These data indicate that intermittent access will generate binge-type eating in the home cage independent of cue predictability. However, predictable cues in the home cage reduce operant responding independent of intermittent access.
Collapse
Affiliation(s)
- F H E Wojnicki
- The Pennsylvania State University, Nutritional Sciences, 110 Chandlee Laboratory, University Park, PA 16802, United States.
| | | | | |
Collapse
|
49
|
Corwin RLW, Wojnicki FHE. Binge-Type Eating Induced by Limited Access to Optional Foods. ACTA ACUST UNITED AC 2012. [DOI: 10.1007/978-1-62703-104-2_4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/28/2023]
|
50
|
Morganstern I, Ye Z, Liang S, Fagan S, Leibowitz SF. Involvement of cholinergic mechanisms in the behavioral effects of dietary fat consumption. Brain Res 2012; 1470:24-34. [PMID: 22765913 DOI: 10.1016/j.brainres.2012.06.004] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Revised: 05/25/2012] [Accepted: 06/02/2012] [Indexed: 02/06/2023]
Abstract
Clinical reports suggest a positive association between fat consumption and the incidence of hyperactivity, impulsivity and cognitive abnormalities. To investigate possible mechanisms underlying these disturbances under short-term conditions, we examined in Sprague-Dawley rats the influence of 7-day consumption of a high-fat diet (HFD) compared to chow on anxiety, novelty-seeking and exploratory behaviors and also on acetylcholine (ACh) neurotransmission that may mediate these behaviors. The HFD consumption, which elevated circulating fatty acids but produced no change in caloric intake or body weight, stimulated novelty-seeking and exploration in an open field, while reducing anxiety in an elevated plus maze. Using the Ellman assay to measure ACh esterase (AChE) activity that breaks down ACh, the second experiment showed HFD consumption to significantly reduce AChE activity in the frontal cortex, hypothalamus and midbrain. With measurements of [¹²⁵I]-epibatidine or [¹²⁵I]-bungarotoxin binding to nicotinic ACh receptors (nAChRs) containing β2 or α7 subunits, respectively, the results also showed HFD consumption to increase both β2-nAChR binding in the medial prefrontal cortex and substantia nigra and α7-nAChR binding in the lateral and ventromedial hypothalamus. When treated with an acute dose of the nicotinic antagonist, mecamylamine (0.5 mg/kg, sc), the HFD animals responded with significantly reduced exploratory and novelty-seeking behaviors, whereas the chow-consuming rats exhibited no response. These findings suggest that the exploratory and novelty-seeking behaviors induced by dietary fat may be mediated by enhanced nicotinic cholinergic activity, which is accompanied by increased density of β2-nAChRs in cortical and midbrain regions associated with impulsivity and locomotor activity and of α7-nAChRs in hypothalamic regions associated with arousal and energy balance.
Collapse
Affiliation(s)
- Irene Morganstern
- The Rockefeller University, 1230 York Avenue, New York, NY 10065, USA
| | | | | | | | | |
Collapse
|