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Xu H, Owens MM, MacKillop J. Neuroanatomical profile of BMI implicates impulsive delay discounting and general cognitive ability. Obesity (Silver Spring) 2023; 31:2799-2808. [PMID: 37853988 DOI: 10.1002/oby.23880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 06/21/2023] [Accepted: 06/30/2023] [Indexed: 10/20/2023]
Abstract
OBJECTIVE Obesity is a disorder of excessive adiposity, typically assessed via the anthropometric density measure of BMI. Numerous studies have implicated BMI with differences in brain structure, but with highly inconsistent findings. METHODS Machine learning elastic net regression models with cross-validation were conducted to characterize a neuroanatomical morphometry profile associated with BMI in 1100 participants (22% BMI > 30, n = 242) from the Human Connectome Project Young Adult project. RESULTS Using five-fold cross-validation, the multiregion neuroanatomical profile substantively predicted BMI (R2 = 10.05%), and this was robust in a held-out test set (R2 = 8.87%). In terms of specific regions, the neuroanatomical profile was enriched for nodes in the default mode, executive control, and salience networks. The relationship between the morphometry profile and BMI itself was partially mediated by impulsive delay discounting and general cognitive ability. CONCLUSIONS Taken together, these findings reveal a robust machine learning-derived neuroanatomical profile of BMI, one that comprises nodes in motivational brain networks and suggests the functional links to obesity are via self-regulatory capacity and cognitive function.
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Affiliation(s)
- Hui Xu
- Peter Boris Centre for Addictions Research, St. Joseph's Healthcare Hamilton/McMaster University, Hamilton, Ontario, Canada
| | - Max M Owens
- Peter Boris Centre for Addictions Research, St. Joseph's Healthcare Hamilton/McMaster University, Hamilton, Ontario, Canada
| | - James MacKillop
- Peter Boris Centre for Addictions Research, St. Joseph's Healthcare Hamilton/McMaster University, Hamilton, Ontario, Canada
- Michael G. DeGroote Centre for Medicinal Cannabis Research, St. Joseph's Healthcare Hamilton/McMaster University, Hamilton, Ontario, Canada
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2
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Dunn JP, Lamichhane B, Smith GI, Garner A, Wallendorf M, Hershey T, Klein S. Dorsal striatal response to taste is modified by obesity and insulin resistance. Obesity (Silver Spring) 2023; 31:2065-2075. [PMID: 37475685 PMCID: PMC10767984 DOI: 10.1002/oby.23799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2022] [Revised: 04/15/2023] [Accepted: 04/18/2023] [Indexed: 07/22/2023]
Abstract
OBJECTIVE In preclinical models, insulin resistance in the dorsal striatum (DS) contributes to overeating. Although human studies support the concept of central insulin resistance, they have not investigated its effect on consummatory reward-induced brain activity. METHODS Taste-induced activation was assessed in the caudate and putamen of the DS with blood oxygen level-dependent (BOLD) functional magnetic resonance imaging. Three phenotypically distinct groups were studied: metabolically healthy lean, metabolically healthy obesity, and metabolically unhealthy obesity (MUO; presumed to have central insulin resistance). Participants with MUO also completed a weight loss intervention followed by a second functional magnetic resonance imaging session. RESULTS The three groups were significantly different at baseline consistent with the design. The metabolically healthy lean group had a primarily positive BOLD response, the MUO group had a primarily negative BOLD response, and the metabolically healthy obesity group had a response in between the two other groups. Food craving was predicted by taste-induced activation. After weight loss in the MUO group, taste-induced activation increased in the DS. CONCLUSIONS These data support the hypothesis that insulin resistance and obesity contribute to aberrant responses to taste in the DS, which is only partially attenuated by weight loss. Aberrant responses to food exposure may be a barrier to weight loss.
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Affiliation(s)
- Julia P. Dunn
- VA St. Louis Health Care System, St. Louis, Missouri, USA
- Department of Medicine, Washington University School of Medicine in St. Louis, St. Louis, Missouri, USA
| | - Bidhan Lamichhane
- Department of Neurosurgery, Washington University School of Medicine in St. Louis, St. Louis, Missouri, USA
| | - Gordon I. Smith
- Department of Medicine, Washington University School of Medicine in St. Louis, St. Louis, Missouri, USA
| | - Amy Garner
- VA St. Louis Health Care System, St. Louis, Missouri, USA
| | - Michael Wallendorf
- Division of Biostatistics, Washington University School of Medicine in St. Louis, St. Louis, Missouri, USA
| | - Tamara Hershey
- Departments of Psychiatry and Radiology, Washington University School of Medicine in St. Louis, St. Louis, Missouri, USA
| | - Samuel Klein
- Department of Medicine, Washington University School of Medicine in St. Louis, St. Louis, Missouri, USA
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Carnell S, Steele KE, Thapaliya G, Kuwubara H, Aghababian A, Papantoni A, Nandi A, Brašić JR, Moran TH, Wong DF. Milkshake Acutely Stimulates Dopamine Release in Ventral and Dorsal Striatum in Healthy-Weight Individuals and Patients with Severe Obesity Undergoing Bariatric Surgery: A Pilot Study. Nutrients 2023; 15:2671. [PMID: 37375579 DOI: 10.3390/nu15122671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 05/31/2023] [Accepted: 06/06/2023] [Indexed: 06/29/2023] Open
Abstract
The overconsumption of palatable energy-dense foods drives obesity, but few human studies have investigated dopamine (DA) release in response to the consumption of a palatable meal, a putative mediator of excess intake in obesity. We imaged [11C]raclopride in the brain with positron emission tomography (PET) to assess striatal dopamine (DA) receptor binding pre- and post-consumption of a highly palatable milkshake (250 mL, 420 kcal) in 11 females, 6 of whom had severe obesity, and 5 of whom had healthy-weight. Those with severe obesity underwent assessments pre- and 3 months post-vertical sleeve gastrectomy (VSG). Our results demonstrated decreased post- vs. pre-meal DA receptor binding in the ventral striatum (p = 0.032), posterior putamen (p = 0.012), and anterior caudate (p = 0.018), consistent with meal-stimulated DA release. Analysis of each group separately suggested that results in the caudate and putamen were disproportionately driven by meal-associated changes in the healthy-weight group. Baseline (pre-meal) DA receptor binding was lower in severe obesity than in the healthy-weight group. Baseline DA receptor binding and DA release did not change from pre- to post-surgery. The results of this small pilot study suggest that milkshake acutely stimulates DA release in the ventral and dorsal striatum. This phenomenon likely contributes to the overconsumption of highly palatable foods in the modern environment.
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Affiliation(s)
- Susan Carnell
- Division of Child and Adolescent Psychiatry, Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Kimberley E Steele
- Johns Hopkins Center for Bariatric Surgery, Department of Surgery, Johns Hopkins University School of Medicine, Baltimore, MD 21224, USA
| | - Gita Thapaliya
- Division of Child and Adolescent Psychiatry, Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Hiroto Kuwubara
- Section of High Resolution Brain Positron Emission Tomography Imaging, Division of Nuclear Medicine and Molecular Imaging, The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Anahys Aghababian
- Division of Child and Adolescent Psychiatry, Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Afroditi Papantoni
- Division of Child and Adolescent Psychiatry, Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Ayon Nandi
- Section of High Resolution Brain Positron Emission Tomography Imaging, Division of Nuclear Medicine and Molecular Imaging, The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - James R Brašić
- Section of High Resolution Brain Positron Emission Tomography Imaging, Division of Nuclear Medicine and Molecular Imaging, The Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Timothy H Moran
- Department of Psychiatry and Behavioral Sciences, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Dean F Wong
- Mallinckrodt Institute of Radiology, Departments of Radiology, Psychiatry, Neurology, Neuroscience, Washington University in St. Louis School of Medicine, St. Louis, MO 63110, USA
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Yokum S, Stice E. Relation of Overweight/Obesity to Reward Region Response to Food Reward and the Moderating Effects of Parental History of Eating Pathology in Adolescent Females. Nutrients 2023; 15:nu15112558. [PMID: 37299520 DOI: 10.3390/nu15112558] [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: 03/20/2023] [Revised: 05/04/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023] Open
Abstract
OBJECTIVE To test whether overweight/obesity is associated with an elevated reward region response to milkshake cues and a low reward region response to milkshake receipt. To test whether the risk for eating pathology moderates the effects of weight status on the neural response to milkshake cues and milkshake receipt. METHOD The current study used functional magnetic resonance imaging (fMRI) to examine the neuronal responses of female adolescents (n = 80; M age = 14.6 ± 0.9; M BMI = 21.9 ± 3.6; 41% with a biological parental history of eating pathology) during a food receipt paradigm. RESULTS Females with overweight/obesity showed a greater ventromedial prefrontal cortex (vmPFC), and ventral anterior cingulate (ACC) response to milkshake cues and a greater ventral striatum, subgenual ACC, and dorsomedial prefrontal cortex response to milkshake receipt than those with a healthy weight. Females with overweight/obesity plus a parental history of eating pathology showed a greater vmPFC/medial orbitofrontal cortex response to milkshake cues than those without a parental history of eating pathology and those with a healthy weight. Females with overweight/obesity and without a parental history of eating pathology showed a greater thalamus and striatum response to milkshake receipt. CONCLUSIONS Overweight/obesity is associated with an elevated reward region response to palatable food cues and food receipt. A risk for eating pathology enhances the reward region response to food cues in those with excess weight.
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Affiliation(s)
- Sonja Yokum
- Oregon Research Institute, Springfield, OR 97477, USA
| | - Eric Stice
- Department of Psychiatry and Behavioral Sciences, Stanford University School of Medicine, Stanford, CA 94305, USA
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Gill H, McIntyre RS, Hawco C, Rodrigues NB, Gill B, DiVincenzo JD, Lieberman JM, Marks CA, Cha DS, Lipsitz O, Nazal H, Jasrai A, Rosenblat JD, Mansur RB. Evaluating the neural substrates of effort-expenditure for reward in adults with major depressive disorder and obesity. Psychiatry Res Neuroimaging 2023; 329:111592. [PMID: 36708594 DOI: 10.1016/j.pscychresns.2023.111592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 11/29/2022] [Accepted: 01/12/2023] [Indexed: 01/15/2023]
Abstract
Converging evidence has suggested that disturbances in monetary reward processing may subserve the shared biosignature between major depressive disorder (MDD) and obesity. However, there remains a paucity of studies that have evaluated the deficits in specific subcomponents of reward functioning in populations with MDD and obesity comorbidity. We evaluated the association between effort-expenditure for monetary reward and neural activation in regions associated with reward-based decision making (i.e., the caudate nucleus, anterior cingulate cortex (ACC) and hippocampus) in people with MDD and obesity comorbidity. We acquired structural and functional magnetic resonance imaging (fMRI) in 12 participants and performed a spherical region-of-interest analysis (ROI) using previously defined peak MNI coordinates. A one-sample t-test was employed to compare ROI-specific blood-oxygen-level-dependent (BOLD) signal change during the task choice selection window (i.e., high-effort vs. low-effort task) of the effort-expenditure for reward task (EEfRT). We observed no change in activation of the caudate nucleus, ACC or hippocampus in participants with increased BMI when contrasting the high effort > low effort reward magnitude condition for the EEfRT. The findings from our exploratory study evaluated the disturbances in fundamental reward processes, including cost-benefit decision making, in people MDD and obesity. Future studies should further investigate this relationship with a larger sample size.
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Affiliation(s)
- Hartej Gill
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, ON, Canada; Institute of Medical Science, University of Toronto, Toronto, ON, Canada; Canadian Rapid Treatment Center of Excellence, Mississauga, ON, Canada; Brain and Cognition Discovery Foundation, Toronto, ON, Canada.
| | - Roger S McIntyre
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, ON, Canada; Institute of Medical Science, University of Toronto, Toronto, ON, Canada; Canadian Rapid Treatment Center of Excellence, Mississauga, ON, Canada; Department of Pharmacology, University of Toronto, Toronto, ON, Canada; Department of Psychiatry, University of Toronto, Toronto, ON, Canada; Brain and Cognition Discovery Foundation, Toronto, ON, Canada
| | - Colin Hawco
- Campbell Family Mental Health Institute, Centre for Addiction and Mental Health, Toronto, ON, Canada; Department of Psychiatry & Behavioural Neurosciences, McMaster University, Hamilton, ON, Canada
| | - Nelson B Rodrigues
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, ON, Canada; Canadian Rapid Treatment Center of Excellence, Mississauga, ON, Canada
| | - Barjot Gill
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, ON, Canada
| | - Joshua D DiVincenzo
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, ON, Canada; Canadian Rapid Treatment Center of Excellence, Mississauga, ON, Canada; Department of Pharmacology, University of Toronto, Toronto, ON, Canada; Brain and Cognition Discovery Foundation, Toronto, ON, Canada
| | - Jonathan M Lieberman
- Royal Brisbane & Women's Hospital, Metro North Hospital and Health Service, Brisbane, QLD, Australia
| | - CéAnn A Marks
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, ON, Canada
| | - Danielle S Cha
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, ON, Canada; Canadian Rapid Treatment Center of Excellence, Mississauga, ON, Canada; Royal Brisbane & Women's Hospital, Metro North Hospital and Health Service, Brisbane, QLD, Australia
| | - Orly Lipsitz
- Canadian Rapid Treatment Center of Excellence, Mississauga, ON, Canada
| | - Hana Nazal
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, ON, Canada
| | - Ashitija Jasrai
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, ON, Canada
| | - Joshua D Rosenblat
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, ON, Canada; Institute of Medical Science, University of Toronto, Toronto, ON, Canada; Canadian Rapid Treatment Center of Excellence, Mississauga, ON, Canada; Department of Psychiatry, University of Toronto, Toronto, ON, Canada; Brain and Cognition Discovery Foundation, Toronto, ON, Canada
| | - Rodrigo B Mansur
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, ON, Canada; Department of Psychiatry, University of Toronto, Toronto, ON, Canada
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Lee M, Park MJ, Lee KH, Kim JH, Choi HJ, Kim YH. Obesity mechanism after hypothalamic damage: Cohort analysis of neuroimaging, psychological, cognitive, and clinical phenotyping data. Front Endocrinol (Lausanne) 2023; 14:1114409. [PMID: 37056667 PMCID: PMC10086156 DOI: 10.3389/fendo.2023.1114409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Accepted: 03/01/2023] [Indexed: 03/30/2023] Open
Abstract
OBJECTIVE The hypothalamus regulates energy homeostasis, and its damage results in severe obesity. We aimed to investigate the multifaceted characteristics of hypothalamic obesity. METHODS We performed multidimensional analyses of brain structure/function and psychological and behavioral phenotypes in 29 patients with hypothalamic damage (HD) (craniopharyngioma) and 31 controls (non-functional pituitary adenoma). Patients underwent structural and functional magnetic resonance imaging and completed self-reports and cognitive tasks. RESULTS Patients with HD showed significantly higher postoperative weight gain than controls. The HD group also showed significant hypothalamic damage and lower neural activation in the left caudate nucleus in response to food images. The HD group had significantly higher food inattention, lower satiety, and higher restrained eating behavior. Within the HD group, higher restrained eating behavior was significantly associated with lower activation in the bilateral fusiform gyrus. CONCLUSION These results suggest that hypothalamic damage contributes to weight gain by altering the brain response, attention, satiety, and eating behaviors. The present study proposes novel neuro-psycho-behavioral mechanisms targeted for patients with hypothalamic obesity.
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Affiliation(s)
- Miwoo Lee
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Min-Jung Park
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Kyung Hwa Lee
- Division of Child and Adolescent Psychiatry, Department of Psychiatry, Seoul National University Hospital, Seoul, Republic of Korea
| | - Jung Hee Kim
- Pituitary Center, Seoul National University College of Medicine, Seoul, Republic of Korea
- Department of Internal Medicine, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Hyung Jin Choi
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea
- *Correspondence: Yong Hwy Kim, ; Hyung Jin Choi,
| | - Yong Hwy Kim
- Department of Neurosurgery, Seoul National University College of Medicine, Seoul, Republic of Korea
- Pituitary Center, Seoul National University College of Medicine, Seoul, Republic of Korea
- *Correspondence: Yong Hwy Kim, ; Hyung Jin Choi,
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Adise S, Marshall AT, Kan E, Sowell ER. Access to quality health resources and environmental toxins affect the relationship between brain structure and BMI in a sample of pre and early adolescents. Front Public Health 2022; 10:1061049. [PMID: 36589997 PMCID: PMC9797683 DOI: 10.3389/fpubh.2022.1061049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 10/31/2022] [Indexed: 12/23/2022] Open
Abstract
Background Environmental resources are related to childhood obesity risk and altered brain development, but whether these relationships are stable or if they have sustained impact is unknown. Here, we utilized a multidimensional index of childhood neighborhood conditions to compare the influence of various social and environmental disparities (SED) on body mass index (BMI)-brain relationships over a 2-year period in early adolescence. Methods Data were gathered the Adolescent Brain Cognitive Development Study® (n = 2,970, 49.8% female, 69.1% White, no siblings). Structure magnetic resonance imaging (sMRI), anthropometrics, and demographic information were collected at baseline (9/10-years-old) and the 2-year-follow-up (11/12-years-old). Region of interest (ROIs; 68 cortical, 18 subcortical) estimates of cortical thickness and subcortical volume were extracted from sMRI T1w images using the Desikan atlas. Residential addresses at baseline were used to obtain geocoded estimates of SEDs from 3 domains of childhood opportunity index (COI): healthy environment (COIHE), social/economic (COISE), and education (COIED). Nested, random-effects mixed models were conducted to evaluate relationships of BMI with (1) ROI * COI[domain] and (2) ROI * COI[domain] * Time. Models controlled for sex, race, ethnicity, puberty, and the other two COI domains of non-interest, allowing us to estimate the unique variance explained by each domain and its interaction with ROI and time. Results Youth living in areas with lower COISE and COIED scores were heavier at the 2-year follow-up than baseline and exhibited greater thinning in the bilateral occipital cortex between visits. Lower COISE scores corresponded with larger volume of the bilateral caudate and greater BMI at the 2-year follow-up. COIHE scores showed the greatest associations (n = 20 ROIs) with brain-BMI relationships: youth living in areas with lower COIHE had thinner cortices in prefrontal regions and larger volumes of the left pallidum and Ventral DC. Time did not moderate the COIHE x ROI interaction for any brain region during the examined 2-year period. Findings were independent of family income (i.e., income-to-needs). Conclusion Collectively our findings demonstrate that neighborhood SEDs for health-promoting resources play a particularly important role in moderating relationships between brain and BMI in early adolescence regardless of family-level financial resources.
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Affiliation(s)
- Shana Adise
- Division of Pediatric Research Administration, Department of Pediatrics, Children's Hospital Los Angeles, Los Angeles, CA, United States
| | - Andrew T. Marshall
- Division of Neurology, Department of Pediatrics, Children's Hospital Los Angeles, Los Angeles, CA, United States
| | - Eric Kan
- Division of Pediatric Research Administration, Department of Pediatrics, Children's Hospital Los Angeles, Los Angeles, CA, United States
| | - Elizabeth R. Sowell
- Division of Neurology, Department of Pediatrics, Children's Hospital Los Angeles, Los Angeles, CA, United States
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An EEG study on the effect of being overweight on anticipatory and consummatory reward in response to pleasant taste stimuli. Physiol Behav 2022; 252:113819. [PMID: 35447129 DOI: 10.1016/j.physbeh.2022.113819] [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: 09/14/2021] [Revised: 03/31/2022] [Accepted: 04/16/2022] [Indexed: 11/22/2022]
Abstract
Two-thirds of adults in the United Kingdom currently suffer from overweight or obesity, making it one of the biggest contributors to health problems. Within the framework of the incentive sensitisation theory, it has been hypothesised that overweight people experience heightened reward anticipation when encountering cues that signal food, such as pictures and smells of food, but that they experience less reward from consuming food compared to normal-weight people. There is, however, little evidence for this prediction. Few studies test both anticipation and consumption in the same study, and even fewer with electroencephalography (EEG). This study sought to address this gap in the literature by measuring scalp activity when overweight and normal-weight people encountered cues signalling the imminent arrival of pleasant and neutral taste stimuli, and when they received these stimuli. The behavioural data showed that there was a smaller difference in valence ratings between the pleasant and neutral taste in the overweight than normal-weight group, in accordance with our hypothesis. However, contrary to our hypothesis, the groups did not differ in their electrophysiological response to taste stimuli. Instead, there was a reduction in N1 amplitude to both taste and picture cues in overweight relative to normal-weight participants. This suggests that reduced attention to cues may be a crucial factor in risk of overweight.
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Kung PH, Soriano-Mas C, Steward T. The influence of the subcortex and brain stem on overeating: How advances in functional neuroimaging can be applied to expand neurobiological models to beyond the cortex. Rev Endocr Metab Disord 2022; 23:719-731. [PMID: 35380355 PMCID: PMC9307542 DOI: 10.1007/s11154-022-09720-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/21/2022] [Indexed: 12/13/2022]
Abstract
Functional neuroimaging has become a widely used tool in obesity and eating disorder research to explore the alterations in neurobiology that underlie overeating and binge eating behaviors. Current and traditional neurobiological models underscore the importance of impairments in brain systems supporting reward, cognitive control, attention, and emotion regulation as primary drivers for overeating. Due to the technical limitations of standard field strength functional magnetic resonance imaging (fMRI) scanners, human neuroimaging research to date has focused largely on cortical and basal ganglia effects on appetitive behaviors. The present review draws on animal and human research to highlight how neural signaling encoding energy regulation, reward-learning, and habit formation converge on hypothalamic, brainstem, thalamic, and striatal regions to contribute to overeating in humans. We also consider the role of regions such as the mediodorsal thalamus, ventral striatum, lateral hypothalamus and locus coeruleus in supporting habit formation, inhibitory control of food craving, and attentional biases. Through these discussions, we present proposals on how the neurobiology underlying these processes could be examined using functional neuroimaging and highlight how ultra-high field 7-Tesla (7 T) fMRI may be leveraged to elucidate the potential functional alterations in subcortical networks. Focus is given to how interactions of these regions with peripheral endocannabinoids and neuropeptides, such as orexin, could be explored. Technical and methodological aspects regarding the use of ultra-high field 7 T fMRI to study eating behaviors are also reviewed.
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Affiliation(s)
- Po-Han Kung
- Melbourne School of Psychological Sciences, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Parkville, VIC, Australia
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne, Victoria, Australia
| | - Carles Soriano-Mas
- Psychiatry and Mental Health Group, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Neuroscience Program, L'Hospitalet de Llobregat, Spain
- CIBERSAM, Carlos III Health Institute, Madrid, Spain
- Department of Social Psychology and Quantitative Psychology, University of Barcelona, Barcelona, Spain
| | - Trevor Steward
- Melbourne School of Psychological Sciences, Faculty of Medicine, Dentistry and Health Sciences, University of Melbourne, Parkville, VIC, Australia.
- Melbourne Neuropsychiatry Centre, Department of Psychiatry, The University of Melbourne, Victoria, Australia.
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Fang X, Davis X, Flack KD, Duncan C, Li F, White M, Grilo C, Small DM. Dietary adaptation for weight loss maintenance at Yale (DAWLY): Protocol and predictions for a randomized controlled trial. Front Nutr 2022; 9:940064. [PMID: 35967820 PMCID: PMC9369668 DOI: 10.3389/fnut.2022.940064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 07/08/2022] [Indexed: 11/13/2022] Open
Abstract
Background Current therapies for obesity treatment are effective at producing short-term weight loss, but weight loss maintenance remains a significant challenge. Here we investigate the impact of pre-intervention dietary fat intake on the efficacy of a dietary supplement to support weight loss maintenance. Preclinical work demonstrates that a vagal afferent pathway critical for sensing dietary lipids is blunted by a high-fat diet (HFD), resulting in a reduced preference for a low-fat emulsion and severe blunting of the dopamine (DA) response to the gastric infusion of lipids. Infusion of the gut lipid messenger oleoylethanolamide (OEA), which is also depleted by HFD, immediately reverses this DA blunting and restores preference for the low-fat emulsion. Studies of OEA supplementation for weight loss in humans have had limited success. Given the strong effect of HFD on this pathway, we designed a study to test whether the efficacy of OEA as a weight loss treatment is related to pre-intervention habitual intake of dietary fat. Methods/Design We employed a randomized, double-blind, placebo-controlled trial in which 100 adults with overweight/obesity (OW/OB) were randomized to receive either OEA or placebo daily for 16 months. Following a baseline evaluation of diet, metabolic health, adiposity, and brain response to a palatable an energy dense food, participants in both groups underwent a 4-month behavioral weight loss intervention (LEARN®) followed by a 1-year maintenance period. The study aims are to (1) determine if pre-intervention dietary fat intake moderates the ability of OEA to improve weight loss and weight loss maintenance after a gold standard behavioral weight loss treatment; (2) identify biomarkers that predict outcome and optimize a stratification strategy; and (3) test a model underlying OEA's effectiveness. Discussion Focusing on interventions that target the gut-brain axis is supported by mounting evidence for the role of gut-brain signaling in food choice and the modulation of this circuit by diet. If successful, this work will provide support for targeting the gut-brain pathway for weight loss maintenance using a precision medicine approach that is easy and inexpensive to implement. Clinical Trial Registration [www.ClinicalTrials.gov], identifier [NCT04614233].
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Affiliation(s)
- Xi Fang
- Modern Diet and Physiology Research Center, New Haven, CT, United States,Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States
| | - Xue Davis
- Modern Diet and Physiology Research Center, New Haven, CT, United States,Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States
| | - Kyle D. Flack
- Department of Dietetics and Human Nutrition, College of Agriculture, Foods, and Environment, University of Kentucky, Lexington, KY, United States
| | - Chavonn Duncan
- Modern Diet and Physiology Research Center, New Haven, CT, United States,Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States
| | - Fangyong Li
- Yale Center for Analytical Sciences, Yale School of Public Health, New Haven, CT, United States
| | - Marney White
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States,Department of Social and Behavioral Sciences, Yale School of Public Health, New Haven, CT, United States
| | - Carlos Grilo
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States
| | - Dana M. Small
- Modern Diet and Physiology Research Center, New Haven, CT, United States,Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States,*Correspondence: Dana M. Small,
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Gautier Y, Bergeat D, Serrand Y, Réthoré N, Mahérault M, Malbert CH, Meurice P, Coquery N, Moirand R, Val-Laillet D. [Western diet, obesity and bariatric surgery modulate anxiety, eating habits and the brain responses to sweet taste]. Med Sci (Paris) 2022; 38:125-129. [PMID: 35179462 DOI: 10.1051/medsci/2021252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- Yentl Gautier
- INRAE, Inserm, Univ Rennes, CHU de Rennes, NuMeCan (Nutrition Métabolismes Cancer), 35590 St Gilles, France
| | - Damien Bergeat
- INRAE, Inserm, Univ Rennes, CHU de Rennes, NuMeCan (Nutrition Métabolismes Cancer), 35590 St Gilles, France - CHU Rennes, Service de chirurgie hépatobiliaire et digestive, Rennes, France
| | - Yann Serrand
- INRAE, Inserm, Univ Rennes, CHU de Rennes, NuMeCan (Nutrition Métabolismes Cancer), 35590 St Gilles, France
| | - Noémie Réthoré
- INRAE, Inserm, Univ Rennes, CHU de Rennes, NuMeCan (Nutrition Métabolismes Cancer), 35590 St Gilles, France
| | - Mathilde Mahérault
- INRAE, Inserm, Univ Rennes, CHU de Rennes, NuMeCan (Nutrition Métabolismes Cancer), 35590 St Gilles, France
| | | | - Paul Meurice
- INRAE, Inserm, Univ Rennes, CHU de Rennes, NuMeCan (Nutrition Métabolismes Cancer), 35590 St Gilles, France
| | - Nicolas Coquery
- INRAE, Inserm, Univ Rennes, CHU de Rennes, NuMeCan (Nutrition Métabolismes Cancer), 35590 St Gilles, France
| | - Romain Moirand
- INRAE, Inserm, Univ Rennes, CHU de Rennes, NuMeCan (Nutrition Métabolismes Cancer), 35590 St Gilles, France - CHU de Rennes, Service des maladies du foie et addictologie, 35033 Rennes, France
| | - David Val-Laillet
- INRAE, Inserm, Univ Rennes, CHU de Rennes, NuMeCan (Nutrition Métabolismes Cancer), 35590 St Gilles, France
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12
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Koenis MMG, Papasavas PK, Janssen RJ, Tishler DS, Pearlson GD. Brain responses to anticipatory cues and milkshake taste in obesity, and their relationship to bariatric surgery outcome. Neuroimage 2021; 245:118623. [PMID: 34627978 PMCID: PMC10947342 DOI: 10.1016/j.neuroimage.2021.118623] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Revised: 09/24/2021] [Accepted: 09/27/2021] [Indexed: 12/15/2022] Open
Abstract
There is substantial variability in percent total weight loss (%TWL) following bariatric surgery. Functional brain imaging may explain more variance in post-surgical weight loss than psychological or metabolic information. Here we examined the neuronal responses during anticipatory cues and receipt of drops of milkshake in 52 pre-bariatric surgery men and women with severe obesity (OW, BMI = 35-60 kg/m2) (23 sleeve gastrectomy (SG), 24 Roux-en-Y gastric bypass (RYGB), 3 laparoscopic adjustable gastric banding (LAGB), 2 did not undergo surgery) and 21 healthy-weight (HW) controls (BMI = 19-27 kg/m2). One-year post-surgery weight loss ranged from 3.1 to 44.0 TWL%. Compared to HW, OW had a stronger response to milkshake cues (compared to water) in frontal and motor, somatosensory, occipital, and cerebellar regions. Responses to milkshake taste receipt (compared to water) differed from HW in frontal, motor, and supramarginal regions where OW showed more similar response to water. One year post-surgery, responses to high-fat milkshake cues normalized in frontal, motor, and somatosensory regions. This change in brain response was related to scores on a composite health index. We found no correlation between baseline response to milkshake cues or tastes and%TWL at 1-yr post-surgery. In RYGB participants only, a stronger response to low-fat milkshake and water cues (compared to high-fat) in supramarginal and cuneal regions respectively was associated with more weight loss. A stronger cerebellar response to high-fat vs low-fat milkshake receipt was also associated with more weight loss. We confirm differential responses to anticipatory milkshake cues in participants with severe obesity and HW in the largest adult cohort to date. Our brain wide results emphasizes the need to look beyond reward and cognitive control regions. Despite the lack of a correlation with post-surgical weight loss in the entire surgical group, participants who underwent RYGB showed predictive power in several regions and contrasts. Our findings may help in understanding the neuronal mechanisms associated with obesity.
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Affiliation(s)
- Marinka M G Koenis
- Olin Neuropsychiatry Research Center, Institute of Living at Hartford Hospital, 200 Retreat Avenue, Hartford, CT 06102, United States.
| | - Pavlos K Papasavas
- Division of Metabolic and Bariatric Surgery, Hartford Hospital, 80 Seymour Street, Hartford, CT 06102, United States
| | - Ronald J Janssen
- Olin Neuropsychiatry Research Center, Institute of Living at Hartford Hospital, 200 Retreat Avenue, Hartford, CT 06102, United States
| | - Darren S Tishler
- Division of Metabolic and Bariatric Surgery, Hartford Hospital, 80 Seymour Street, Hartford, CT 06102, United States
| | - Godfrey D Pearlson
- Olin Neuropsychiatry Research Center, Institute of Living at Hartford Hospital, 200 Retreat Avenue, Hartford, CT 06102, United States; Department of Psychiatry, Yale University School of Medicine, 333 Cedar Street, New Haven, CT 06510, United States; Department of Neuroscience, Yale University School of Medicine, 333 Cedar Street, New Haven, CT 06510, United States
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13
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Ciria LF, Watson P, Vadillo MA, Luque D. Is the habit system altered in individuals with obesity? A systematic review. Neurosci Biobehav Rev 2021; 128:621-632. [PMID: 34252472 DOI: 10.1016/j.neubiorev.2021.07.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 05/27/2021] [Accepted: 07/06/2021] [Indexed: 12/15/2022]
Abstract
Habit-like eating behavior is repeatedly pointed to as a key cognitive mechanism contributing to the emergence and maintenance of obesity. Here, we conducted a systematic review of the literature to assess the existent behavioral evidence for the Habit Hypothesis for Overeating (HHO) which states that obesity is the consequence of an imbalance between the habit and goal-directed reward learning systems, leading to overconsumption of food. We found a total of 19 studies implementing a variety of experimental protocols (i.e., free operant paradigm, slips-of-action test, two-step task, Pavlovian-to-Instrumental paradigm, probabilistic learning task) and manipulations. Taken together, the studies on clinical (binge eating disorder) and non-clinical individuals with overweight or obesity do not support the HHO conclusively. While the scientific literature on HHO is still in its infancy, the heterogeneity of the extant studies makes it difficult to evaluate the degree of convergence of these findings. Uncovering the role of reward learning systems in eating behaviors might have a transformative impact on public health.
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Affiliation(s)
- Luis F Ciria
- Departamento de Psicología Básica, Universidad Autónoma de Madrid, Spain; Departamento de Psicología Básica, Universidad de Málaga, Spain.
| | - Poppy Watson
- School of Psychology, University of New South Wales, Sydney, Australia
| | - Miguel A Vadillo
- Departamento de Psicología Básica, Universidad Autónoma de Madrid, Spain
| | - David Luque
- Departamento de Psicología Básica, Universidad Autónoma de Madrid, Spain; Departamento de Psicología Básica, Universidad de Málaga, Spain.
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14
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The insulo-opercular cortex encodes food-specific content under controlled and naturalistic conditions. Nat Commun 2021; 12:3609. [PMID: 34127675 PMCID: PMC8203663 DOI: 10.1038/s41467-021-23885-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 05/13/2021] [Indexed: 12/02/2022] Open
Abstract
The insulo-opercular network functions critically not only in encoding taste, but also in guiding behavior based on anticipated food availability. However, there remains no direct measurement of insulo-opercular activity when humans anticipate taste. Here, we collect direct, intracranial recordings during a food task that elicits anticipatory and consummatory taste responses, and during ad libitum consumption of meals. While cue-specific high-frequency broadband (70–170 Hz) activity predominant in the left posterior insula is selective for taste-neutral cues, sparse cue-specific regions in the anterior insula are selective for palatable cues. Latency analysis reveals this insular activity is preceded by non-discriminatory activity in the frontal operculum. During ad libitum meal consumption, time-locked high-frequency broadband activity at the time of food intake discriminates food types and is associated with cue-specific activity during the task. These findings reveal spatiotemporally-specific activity in the human insulo-opercular cortex that underlies anticipatory evaluation of food across both controlled and naturalistic settings. Animal studies have shown that insulo-opercular network function is critical in gustation and in behaviour based on anticipated food availability. The authors describe activities within the human insulo-opercular cortex which underlie anticipatory food evaluation in both controlled and naturalistic settings.
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15
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Abstract
PURPOSE OF REVIEW From single cells to entire organisms, biological entities are in constant communication with their surroundings, deciding what to 'allow' in, and what to reject. In very different ways, the immune and taste systems both fulfill this function, with growing evidence suggesting a relationship between the two, through shared signaling pathways, receptors, and feedback loops. The purpose of this review was to explore recent reports on taste and immunity in model animals and in humans to explore our understanding of the interplay between these systems. RECENT FINDINGS Acute infections in the upper airway, as with SARS-CoV-2, are associated with a proinflammatory state, and blunted taste perception. Further, recent findings highlight taste receptors working as immune sentinels throughout the body. Work in humans and mice also points to inflammation from obesity impacting taste, altering taste bud abundance and composition. There is accumulating evidence that taste cells, and particularly their receptors, play a role in airway and gut immunity, responsive to invading organisms. Inflammation itself may further act on taste buds and other taste receptor expressing cells throughout the body as a form of homeostatic control.
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Affiliation(s)
- Jason R Goodman
- Department of Food Science, Cornell University, Ithaca, NY, 14853, USA
| | - Robin Dando
- Department of Food Science, Cornell University, Ithaca, NY, 14853, USA.
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16
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Nakamura Y, Koike S. Association of Disinhibited Eating and Trait of Impulsivity With Insula and Amygdala Responses to Palatable Liquid Consumption. Front Syst Neurosci 2021; 15:647143. [PMID: 34012386 PMCID: PMC8128107 DOI: 10.3389/fnsys.2021.647143] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 04/09/2021] [Indexed: 12/31/2022] Open
Abstract
Eating behavior is not only influenced by the current energy balance, but also by the behavioral characteristics of eating. One of the recognized eating behavior constructs is ‘disinhibited eating,’ which refers to the tendency to overeat in response to negative emotional states or the presence of highly palatable foods. Food-related disinhibition is involved in binge eating, weight gain, and obesity and is also associated with the trait of impulsivity, which in turn, is linked to weight gain or maladaptive eating. However, the relationships among food-related disinhibition, the trait of impulsivity, and the neural substrates of eating behaviors in adolescence remain unclear. Therefore, we designed a functional magnetic resonance imaging (fMRI) study to examine the associations between brain responses to palatable liquid consumption and disinhibited eating behavior or impulsivity in healthy adolescents. Thirty-four adolescents (mean age ± standard deviation = 17.12 ± 1.91 years, age range = 14–19 years, boys = 15, girls = 19) participated in this study. Disinhibited eating was assessed with the disinhibition subscale of the Three-Factor Eating Questionnaire, while impulsivity was assessed using the Barratt impulsiveness scale. Participants received two fMRI sessions−a palatable liquid consumption fMRI and a resting-state fMRI. The fMRI experiment showed that increased disinhibited eating was positively associated with a greater insular response to palatable liquid consumption, while increased impulsivity was positively correlated with a greater amygdala response. The resting-state fMRI experiment showed that increased disinhibited eating was positively correlated with strengthened intrinsic functional connectivity between the insula and the amygdala, adjusting for sex (estimates of the beta coefficients = 0.146, standard error = 0.068, p = 0.040). Given that the amygdala and insular cortex are structurally and functionally connected and involved in trait impulsivity and ingestive behavior, our findings suggest that increased disinhibited eating would be associated with impulsivity via strengthened intrinsic functional connectivity between the insula and amygdala and linked to maladaptive eating.
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Affiliation(s)
- Yuko Nakamura
- UTokyo Center for Integrative Science of Human Behavior, The University of Tokyo, Tokyo, Japan
| | - Shinsuke Koike
- UTokyo Center for Integrative Science of Human Behavior, The University of Tokyo, Tokyo, Japan.,International Research Center for Neurointelligence, The University of Tokyo Institutes for Advanced Study, Tokyo, Japan.,UTokyo Institute for Diversity and Adaptation of Human Mind, The University of Tokyo, Tokyo, Japan.,Center for Evolutionary Cognitive Sciences, Graduate School of Arts and Sciences, The University of Tokyo, Tokyo, Japan
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17
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Saruco E, Pleger B. A Systematic Review of Obesity and Binge Eating Associated Impairment of the Cognitive Inhibition System. Front Nutr 2021; 8:609012. [PMID: 33996871 PMCID: PMC8116510 DOI: 10.3389/fnut.2021.609012] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 03/09/2021] [Indexed: 02/04/2023] Open
Abstract
Altered functioning of the inhibition system and the resulting higher impulsivity are known to play a major role in overeating. Considering the great impact of disinhibited eating behavior on obesity onset and maintenance, this systematic review of the literature aims at identifying to what extent the brain inhibitory networks are impaired in individuals with obesity. It also aims at examining whether the presence of binge eating disorder leads to similar although steeper neural deterioration. We identified 12 studies that specifically assessed impulsivity during neuroimaging. We found a significant alteration of neural circuits primarily involving the frontal and limbic regions. Functional activity results show BMI-dependent hypoactivity of frontal regions during cognitive inhibition and either increased or decreased patterns of activity in several other brain regions, according to their respective role in inhibition processes. The presence of binge eating disorder results in further aggravation of those neural alterations. Connectivity results mainly report strengthened connectivity patterns across frontal, parietal, and limbic networks. Neuroimaging studies suggest significant impairment of various neural circuits involved in inhibition processes in individuals with obesity. The elaboration of accurate therapeutic neurocognitive interventions, however, requires further investigations, for a deeper identification and understanding of obesity-related alterations of the inhibition brain system.
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Affiliation(s)
- Elodie Saruco
- Department of Neurology, BG University Clinic Bergmannsheil, Ruhr-University Bochum, Bochum, Germany
| | - Burkhard Pleger
- Department of Neurology, BG University Clinic Bergmannsheil, Ruhr-University Bochum, Bochum, Germany
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18
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Yokum S, Bohon C, Berkman E, Stice E. Test-retest reliability of functional MRI food receipt, anticipated receipt, and picture tasks. Am J Clin Nutr 2021; 114:764-779. [PMID: 33851199 PMCID: PMC8326039 DOI: 10.1093/ajcn/nqab096] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Accepted: 03/05/2021] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Functional MRI (fMRI) tasks are increasingly being used to advance knowledge of the etiology and maintenance of obesity and eating disorders. Thus, understanding the test-retest reliability of BOLD signal contrasts from these tasks is important. OBJECTIVES To evaluate test-retest reliability of responses in reward-related brain regions to food receipt paradigms (palatable tastes, anticipated palatable tastes), food picture paradigms (high-calorie food pictures), a monetary reward paradigm (winning money and anticipating winning money), and a thin female model picture paradigm (thin female model pictures). METHOD We conducted secondary univariate contrast-based analyses in data drawn from 4 repeated-measures fMRI studies. Participants (Study 1: N = 60, mean [M] age = 15.2 ± 1.1 y; Study 2: N = 109, M age = 15.1 ± 0.9 y; Study 3: N = 39, M age = 21.2 ± 3.7 y; Study 4: N = 62, M age = 29.7 ± 6.2 y) completed the same tasks over 3-wk to 3-y test-retest intervals. Studies 3 and 4 included participants with eating disorders and obesity, respectively. RESULTS Test-retest reliability of the food receipt and food picture paradigms was poor, with average ICC values ranging from 0.07 to 0.20. The monetary reward paradigm and the thin female model picture paradigm also showed poor test-retest reliability: average ICC values 0.21 and 0.12, respectively. Although several regions demonstrated moderate to good test-retest reliability, these results did not replicate across studies using similar paradigms. In Studies 3 and 4, but not Study 1, test-retest reliability in visual processing regions was moderate to good when contrasting single conditions with a low-level baseline. CONCLUSIONS Results underscore the importance of examining the temporal reliability of fMRI tasks and call for the development and use of well-validated standardized fMRI tasks in eating- and obesity-related studies that can provide more reliable measures of neural activation. The trials were registered at clinicaltrials.gov as NCT02084836, NCT01949636, NCT03261050, and NCT03375853.
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Affiliation(s)
| | - Cara Bohon
- Department of Psychiatry, Stanford University, Stanford, CA, USA
| | - Elliot Berkman
- Department of Psychology, Center for Translational Neuroscience, University of Oregon, Eugene, OR, USA
| | - Eric Stice
- Department of Psychiatry, Stanford University, Stanford, CA, USA
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19
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Agarwal K, Manza P, Leggio L, Livinski AA, Volkow ND, Joseph PV. Sensory cue reactivity: Sensitization in alcohol use disorder and obesity. Neurosci Biobehav Rev 2021; 124:326-357. [PMID: 33587959 DOI: 10.1016/j.neubiorev.2021.02.014] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2020] [Revised: 02/03/2021] [Accepted: 02/07/2021] [Indexed: 12/21/2022]
Abstract
Neuroimaging techniques to measure the function of the human brain such as electroencephalography (EEG), positron emission tomography (PET), and functional magnetic resonance imaging (fMRI), are powerful tools for understanding the underlying neural circuitry associated with alcohol use disorder (AUD) and obesity. The sensory (visual, taste and smell) paradigms used in neuroimaging studies represent an ideal platform to investigate the connection between the different neural circuits subserving the reward/executive control systems in these disorders, which may offer a translational mechanism for novel intervention predictions. Thus, the current review provides an integrated summary of the recent neuroimaging studies that have applied cue-reactivity paradigms and neuromodulation strategies to explore underlying alterations in neural circuitry as well in treatment strategies in AUD and obesity. Finally, we discuss literature on mechanisms associated with increased alcohol sensitivity post-bariatric surgery (BS) which offers guidance for future research to use sensory percepts in elucidating the relation of reward signaling in AUD development post-BS.
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Affiliation(s)
- Khushbu Agarwal
- National Institute on Alcohol Abuse and Alcoholism, Bethesda, MD, USA; National Institute of Nursing Research, Bethesda, MD, USA
| | - Peter Manza
- National Institute on Alcohol Abuse and Alcoholism, Bethesda, MD, USA
| | - Lorenzo Leggio
- National Institute on Alcohol Abuse and Alcoholism, Bethesda, MD, USA; National Institute on Drug Abuse, Bethesda and Baltimore, MD, USA
| | | | - Nora D Volkow
- National Institute on Alcohol Abuse and Alcoholism, Bethesda, MD, USA; National Institute on Drug Abuse, Bethesda and Baltimore, MD, USA
| | - Paule Valery Joseph
- National Institute on Alcohol Abuse and Alcoholism, Bethesda, MD, USA; National Institute of Nursing Research, Bethesda, MD, USA.
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20
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Western diet, obesity and bariatric surgery sequentially modulated anxiety, eating patterns and brain responses to sucrose in adult Yucatan minipigs. Sci Rep 2020; 10:20130. [PMID: 33208772 PMCID: PMC7676239 DOI: 10.1038/s41598-020-76910-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2020] [Accepted: 11/02/2020] [Indexed: 01/03/2023] Open
Abstract
Palatable sweet/fatty foods overconsumption is a major risk factor for obesity and eating disorders, also having an impact on neuro-behavioural hedonic and cognitive components comparable to what is described for substance abuse. We hypothesized that Yucatan minipigs would show hedonic, cognitive, and affective neuro-behavioral shifts when subjected to western diet (WD) exposure without weight gain, after the onset of obesity, and finally after weight loss induced by caloric restriction with (RYGB) or without (Sham) gastric bypass. Eating behavior, cognitive and affective abilities were assessed with a spatial discrimination task (holeboard test) and two-choice feed tests. Brain responses to oral sucrose were mapped using 18F-FDG positron emission tomography. WD exposure impaired working memory and led to an “addiction-type” neuronal pattern involving hippocampal and cortical brain areas. Obesity induced anxiety-like behavior, loss of motivation, and snacking-type eating behavior. Weight loss interventions normalized the motivational and affective states but not eating behavior patterns. Brain glucose metabolism increased in gustatory (insula) and executive control (aPFC) areas after weight loss, but RYGB showed higher responses in inhibition-related areas (dorsal striatum). These results showed that diet quality, weight loss, and the type of weight loss intervention differently impacted brain responses to sucrose in the Yucatan minipig model.
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21
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Nakamura Y, Ozawa S, Koike S. Caudate Functional Connectivity Associated With Weight Change in Adolescents. Front Hum Neurosci 2020; 14:587763. [PMID: 33304257 PMCID: PMC7701280 DOI: 10.3389/fnhum.2020.587763] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Accepted: 10/27/2020] [Indexed: 01/22/2023] Open
Abstract
Background Childhood obesity has become a global epidemic and the etiology of maladaptive ingestive behavior in children warrants further research. Mounting evidence suggests that the caudate is associated with body weight gain and obesity in adults. In adolescents, however, how caudate-related neural networks are associated with body weight gain is unclear because their central nervous systems are still developing. Objectives The current longitudinal resting-state functional magnetic resonance imaging (rs-fMRI) study was conducted to investigate the hypothesis that caudate-related neural networks have a role in weight gain in adolescents. Methods The study included 20 healthy adolescents with a mean age of 17.5 ± 2.0 years and a mean body mass index of 20.6 ± 2.1 who underwent baseline rs-fMRI then follow-up rs-fMRI approximately 1 year later. Body mass index (BMI) was measured at both timepoints. Seed-based functional connectivity analysis was utilized to analyze caudate-related functional connectivity (FC) using the caudate as a seed. Associations between caudate-related FC and BMI at baseline were assessed, as were associations between change in BMI and caudate-related FC between baseline and follow-up. Results At baseline, greater caudate-lateral prefrontal cortex FC was correlated with lower BMI (family wise error-corrected p < 0.05). Compared to the baseline, increased FC in the caudate-lateral prefrontal cortex at follow up were negatively associated with increased BMI (p < 0.05). Conclusion Given that the lateral prefrontal cortex and caudate are associated with inhibitory control, the caudate-lateral prefrontal cortex FC may have a preventive effect on weight gain in adolescents. The results of the current study suggest that developing inhibitory control would lead to the prevention of childhood obesity.
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Affiliation(s)
- Yuko Nakamura
- UTokyo Center for Integrative Science of Human Behavior, The University of Tokyo, Tokyo, Japan
| | - Sachiyo Ozawa
- UTokyo Center for Integrative Science of Human Behavior, The University of Tokyo, Tokyo, Japan
| | - Shinsuke Koike
- UTokyo Center for Integrative Science of Human Behavior, The University of Tokyo, Tokyo, Japan.,International Research Center for Neurointelligence, Tokyo, Japan.,University of Tokyo Institute for Diversity and Adaptation of Human Mind, Tokyo, Japan.,Center for Evolutionary Cognitive Sciences, Graduate School of Arts and Sciences, University of Tokyo, Tokyo, Japan
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22
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Qian Z, Liu S, Zhu X, Kong L, Liu N, Wang D, Jiang C, Zhan Z, Yuan F. Higher Trait Impulsivity and Altered Frontostriatal Connectivity in Betel-Quid Dependent Individuals. Front Hum Neurosci 2020; 14:578913. [PMID: 33192412 PMCID: PMC7658367 DOI: 10.3389/fnhum.2020.578913] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2020] [Accepted: 09/22/2020] [Indexed: 12/17/2022] Open
Abstract
Objective: Betel quid dependency (BQD) is characterized by functional and structural brain alterations. Trait impulsivity may influence substance dependence by impacting its neurobiological underpinnings in the frontostriatal circuit. However, little is known about the trait impulsivity and its neural correlates in individuals with BQD. Methods: Forty-eight participants with BQD and 22 normal controls (NCs) were recruited and scanned on a 3T MRI scanner. Barratt impulsiveness scale (BIS) was used to measure trait impulsivity: motor, attention, and no plan impulsivity. We used voxel-based morphometry (VBM) to assess the relationship between trait impulsivity and gray matter volumes. The relevant clusters identified were served as regions of interest (ROI) seeds. The whole-volume psycho-physiological interactions (PPI) analysis was used to investigate the changes of functional connectivity related to ROI seeds in the cue-reactivity task condition (BQ and control images). Results: Behaviorally, the BQD group showed significantly higher trait impulsivity including motor and no plan impulsivity than the NCs group. VBM analyses showed that motor impulsivity was negatively associated with gray matter volume of right caudate in the whole sample. No difference in gray matter volume between the two groups was observed. PPI analyses showed that there was a significantly decreased functional connectivity between the right caudate and right dorsolateral prefrontal cortex (DLPFC) when watching BQ related images than control images in individuals with BQD. Furthermore, functional connectivity between the right caudate and right DLPFC was negatively correlated with BQ dependency scores. Conclusions: Our study demonstrated the structural basis of trait impulsivity in the caudate and provided evidence for abnormal interactions within frontostriatal circuitsin individuals with BQD, which may provide insight into the selection of potential novel therapeutic targets for the treatment of BQ dependency.
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Affiliation(s)
- Zhaoxin Qian
- Department of Emergency, Xiangya Hospital, Central South University, Changsha, China
| | - Shaohui Liu
- Health Management Center, Xiangya Hospital, Central South University, Changsha, China
| | - Xueling Zhu
- Department of Radiology, Xiangya Hospital, Central South University, Changsha, China
| | - Lingyu Kong
- Department of Radiology, Xiangya Hospital, Central South University, Changsha, China
| | - Neng Liu
- Department of Nursing, Xiangya Hospital, Central South University, Changsha, China
| | - Dongcui Wang
- Department of Radiology, Xiangya Hospital, Central South University, Changsha, China
| | - Canhua Jiang
- Department of Oral and Maxillofacial Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Zhongyuan Zhan
- Department of Oral and Maxillofacial Surgery, Xiangya Hospital, Central South University, Changsha, China
| | - Fulai Yuan
- Health Management Center, Xiangya Hospital, Central South University, Changsha, China
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23
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Appetitive traits as targets for weight loss: The role of food cue responsiveness and satiety responsiveness. Physiol Behav 2020; 224:113018. [PMID: 32562711 DOI: 10.1016/j.physbeh.2020.113018] [Citation(s) in RCA: 29] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2020] [Revised: 06/05/2020] [Accepted: 06/15/2020] [Indexed: 01/12/2023]
Abstract
Individuals with overweight or obesity (OW/OB) are at increased risk for significant physical and psychological comorbidities. The current treatment for OW/OB is behavioral weight loss, which provides psychoeducation on nutrition and physical activity, as well as behavior therapy skills. However, behavioral weight loss is not effective for the majority of the individuals who participate. Research suggests that overeating, or eating past nutritional needs, is one of the leading causes of weight gain. Accumulating evidence suggests that appetitive traits, such as food cue responsiveness and satiety responsiveness, are associated with overeating and weight in youth and adults. The following review presents the current literature on the relationship between food cue responsiveness, satiety responsiveness, overeating, and OW/OB. Research suggests that higher food cue responsiveness and lower satiety responsiveness are associated with overeating and OW/OB cross-sectionally and longitudinally. Emerging data suggest that food cue responsiveness and satiety responsiveness may exist along the same continuum and can be targeted to manage overeating and reduce weight. We have developed a treatment model targeting food cue responsiveness and satiety responsiveness to reduce overeating and weight and have preliminary feasibility, acceptability, and efficacy data, with testing currently being conducted in larger trials. Through programs targeting appetitive traits we hope to develop an alternative weight loss model to assist individuals with a propensity to overeat.
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Berland C, Montalban E, Perrin E, Di Miceli M, Nakamura Y, Martinat M, Sullivan M, Davis XS, Shenasa MA, Martin C, Tolu S, Marti F, Caille S, Castel J, Perez S, Salinas CG, Morel C, Hecksher-Sørensen J, Cador M, Fioramonti X, Tschöp MH, Layé S, Venance L, Faure P, Hnasko TS, Small DM, Gangarossa G, Luquet SH. Circulating Triglycerides Gate Dopamine-Associated Behaviors through DRD2-Expressing Neurons. Cell Metab 2020; 31:773-790.e11. [PMID: 32142669 PMCID: PMC7250662 DOI: 10.1016/j.cmet.2020.02.010] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 12/16/2019] [Accepted: 02/13/2020] [Indexed: 12/31/2022]
Abstract
Energy-dense food alters dopaminergic (DA) transmission in the mesocorticolimbic (MCL) system and can promote reward dysfunctions, compulsive feeding, and weight gain. Yet the mechanisms by which nutrients influence the MCL circuitry remain elusive. Here, we show that nutritional triglycerides (TGs), a conserved post-prandial metabolic signature among mammals, can be metabolized within the MCL system and modulate DA-associated behaviors by gating the activity of dopamine receptor subtype 2 (DRD2)-expressing neurons through a mechanism that involves the action of the lipoprotein lipase (LPL). Further, we show that in humans, post-prandial TG excursions modulate brain responses to food cues in individuals carrying a genetic risk for reduced DRD2 signaling. Collectively, these findings unveil a novel mechanism by which dietary TGs directly alter signaling in the reward circuit to regulate behavior, thereby providing a new mechanistic basis by which energy-rich diets may lead to (mal)adaptations in DA signaling that underlie reward deficit and compulsive behavior.
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Affiliation(s)
- Chloé Berland
- Université de Paris, BFA, UMR 8251, CNRS, F-75014 Paris, France; Helmholtz Diabetes Center, Helmholtz Zentrum München, German Research Center for Environmental Health, München, Neuherberg, Germany
| | | | - Elodie Perrin
- Center for Interdisciplinary Research in Biology, College de France, INSERM U1050, CNRS UMR 7241, Labex Memolife, 75005 Paris, France
| | - Mathieu Di Miceli
- Université Bordeaux, INRA, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | - Yuko Nakamura
- The Modern Diet and Physiology Research Center, New Haven, CT, USA; Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
| | - Maud Martinat
- Université Bordeaux, INRA, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | - Mary Sullivan
- The Modern Diet and Physiology Research Center, New Haven, CT, USA; Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
| | - Xue S Davis
- The Modern Diet and Physiology Research Center, New Haven, CT, USA; Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
| | - Mohammad Ali Shenasa
- Department of Neurosciences, University of California, San Diego, La Jolla, CA, USA
| | - Claire Martin
- Université de Paris, BFA, UMR 8251, CNRS, F-75014 Paris, France
| | - Stefania Tolu
- Sorbonne Université, CNRS UMR 8246, INSERM, Neurosciences Paris Seine, Institut de Biologie Paris-Seine, Paris, France
| | - Fabio Marti
- Sorbonne Université, CNRS UMR 8246, INSERM, Neurosciences Paris Seine, Institut de Biologie Paris-Seine, Paris, France
| | - Stephanie Caille
- Université Bordeaux, Institut de Neurosciences Cognitives et Intégratives d'Aquitaine, CNRS, UMR5287, 33076 Bordeaux, France
| | - Julien Castel
- Université de Paris, BFA, UMR 8251, CNRS, F-75014 Paris, France
| | - Sylvie Perez
- Center for Interdisciplinary Research in Biology, College de France, INSERM U1050, CNRS UMR 7241, Labex Memolife, 75005 Paris, France
| | | | - Chloé Morel
- Université de Paris, BFA, UMR 8251, CNRS, F-75014 Paris, France
| | - Jacob Hecksher-Sørensen
- Global Research, Novo Nordisk A/S, Måløv, Denmark; Gubra ApS, Hørsholm Kongevej 11B, 2970 Hørsholm, Denmark
| | - Martine Cador
- Université Bordeaux, Institut de Neurosciences Cognitives et Intégratives d'Aquitaine, CNRS, UMR5287, 33076 Bordeaux, France
| | - Xavier Fioramonti
- Université Bordeaux, INRA, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | - Matthias H Tschöp
- Helmholtz Diabetes Center, Helmholtz Zentrum München, German Research Center for Environmental Health, München, Neuherberg, Germany; Division of Metabolic Diseases, TUM, Munich, Germany; Institute for Advanced Study, TUM, Munich, Germany
| | - Sophie Layé
- Université Bordeaux, INRA, Bordeaux INP, NutriNeuro, UMR 1286, F-33000 Bordeaux, France
| | - Laurent Venance
- Center for Interdisciplinary Research in Biology, College de France, INSERM U1050, CNRS UMR 7241, Labex Memolife, 75005 Paris, France
| | - Philippe Faure
- Sorbonne Université, CNRS UMR 8246, INSERM, Neurosciences Paris Seine, Institut de Biologie Paris-Seine, Paris, France
| | - Thomas S Hnasko
- Department of Neurosciences, University of California, San Diego, La Jolla, CA, USA; Research Service VA San Diego Healthcare System, San Diego, CA 92161, USA
| | - Dana M Small
- The Modern Diet and Physiology Research Center, New Haven, CT, USA; Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA
| | | | - Serge H Luquet
- Université de Paris, BFA, UMR 8251, CNRS, F-75014 Paris, France; The Modern Diet and Physiology Research Center, New Haven, CT, USA.
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Steward T, Miranda-Olivos R, Soriano-Mas C, Fernández-Aranda F. Neuroendocrinological mechanisms underlying impulsive and compulsive behaviors in obesity: a narrative review of fMRI studies. Rev Endocr Metab Disord 2019; 20:263-272. [PMID: 31654260 DOI: 10.1007/s11154-019-09515-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Impulsivity and compulsivity are multidimensional constructs that are increasingly considered determinants of obesity. Studies using functional magnetic resonance imaging (fMRI) have provided insight on how differences in brain response during tasks exploring facets of impulsivity and compulsivity relate to the ingestive behaviors that support the etiology and maintenance of obesity. In this narrative review, we provide an overview of neuroimaging studies exploring impulsivity and compulsivity factors as they relate to weight status. Special focus will be placed on studies examining the impulsivity-related dimensions of attentional bias, delayed gratification and emotion regulation. Discussions of compulsivity within the context of obesity will be restricted to fMRI studies investigating habit formation and response flexibility under shifting contingencies. Further, we will highlight neuroimaging research demonstrating how alterations in neuroendocrine functioning are linked to excessive food intake and may serve as a driver of the impulsive and compulsive behaviors observed in obesity. Research on the associations between brain response with neuroendocrine factors, such as insulin, peptide YY (PYY), leptin, ghrelin and glucagon-like peptide 1 (GLP-1), will be reviewed.
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Affiliation(s)
- Trevor Steward
- Department of Psychiatry, Bellvitge University Hospital-IDIBELL, c/ Feixa Llarga s/n, 08907 L'Hospitalet de Llobregat, Barcelona, Spain
- Ciber Fisiopatologia Obesidad y Nutrición (CIBEROBN), Instituto Salud Carlos III, Barcelona, Spain
- Melbourne School of Psychological Sciences, University of Melbourne, Parkville, Victoria, Australia
| | - Romina Miranda-Olivos
- Department of Psychiatry, Bellvitge University Hospital-IDIBELL, c/ Feixa Llarga s/n, 08907 L'Hospitalet de Llobregat, Barcelona, Spain
- Ciber Fisiopatologia Obesidad y Nutrición (CIBEROBN), Instituto Salud Carlos III, Barcelona, Spain
| | - Carles Soriano-Mas
- Department of Psychiatry, Bellvitge University Hospital-IDIBELL, c/ Feixa Llarga s/n, 08907 L'Hospitalet de Llobregat, Barcelona, Spain.
- Department of Psychobiology and Methodology in Health Sciences, Universitat Autònoma de Barcelona, Bellaterra, Spain.
- Ciber de Salud Mental (CIBERSAM), Instituto Salud Carlos III, Barcelona, Spain.
| | - Fernando Fernández-Aranda
- Department of Psychiatry, Bellvitge University Hospital-IDIBELL, c/ Feixa Llarga s/n, 08907 L'Hospitalet de Llobregat, Barcelona, Spain.
- Ciber Fisiopatologia Obesidad y Nutrición (CIBEROBN), Instituto Salud Carlos III, Barcelona, Spain.
- Department of Clinical Sciences, School of Medicine and Health Sciences, University of Barcelona, Barcelona, Spain.
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Kure Liu C, Joseph PV, Feldman DE, Kroll DS, Burns JA, Manza P, Volkow ND, Wang GJ. Brain Imaging of Taste Perception in Obesity: a Review. Curr Nutr Rep 2019; 8:108-119. [PMID: 30945140 PMCID: PMC6486899 DOI: 10.1007/s13668-019-0269-y] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
PURPOSE OF REVIEW We summarize neuroimaging findings related to processing of taste (fat, salt, umami, bitter, and sour) in the brain and how they influence hedonic responses and eating behaviors and their role in obesity. RECENT FINDINGS Neuroimaging studies in obese individuals have revealed alterations in reward/motivation, executive control/self-regulation, and limbic/affective circuits that are implicated in food and drug addiction. Psychophysical studies show that sensory properties of food ingredients may be associated with anthropometric and neurocognitive outcomes in obesity. However, few studies have examined the neural correlates of taste and processing of calories and nutrient content in obesity. The literature of neural correlated of bitter, sour, and salty tastes remains sparse in obesity. Most published studies have focused on sweet, followed by fat and umami taste. Studies on calorie processing and its conditioning by preceding taste sensations have started to delineate a dynamic pattern of brain activation associated with appetition. Our expanded understanding of taste processing in the brain from neuroimaging studies is poised to reveal novel prevention and treatment targets to help address overeating and obesity.
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Affiliation(s)
- Christopher Kure Liu
- Laboratory of Neuroimaging, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, 10 Center Dr, Rm B2L124, Bethesda, MD 20892-1013 USA
| | - Paule Valery Joseph
- Sensory Science and Metabolism Unit, Biobehavioral Branch, National Institute of Nursing Research, National Institutes of Health, 31 Center Drive, Rm 5B03, Bethesda, MD 20892-2178 USA
| | - Dana E. Feldman
- Laboratory of Neuroimaging, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, 10 Center Dr, Rm B2L124, Bethesda, MD 20892-1013 USA
| | - Danielle S. Kroll
- Laboratory of Neuroimaging, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, 10 Center Dr, Rm B2L124, Bethesda, MD 20892-1013 USA
| | - Jamie A. Burns
- Laboratory of Neuroimaging, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, 10 Center Dr, Rm B2L124, Bethesda, MD 20892-1013 USA
| | - Peter Manza
- Laboratory of Neuroimaging, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, 10 Center Dr, Rm B2L124, Bethesda, MD 20892-1013 USA
| | - Nora D. Volkow
- Laboratory of Neuroimaging, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, 10 Center Dr, Rm B2L124, Bethesda, MD 20892-1013 USA
- National Institute on Drug Abuse, National Institutes of Health, 6001 Executive Blvd., Suite 5274, Bethesda, MD 20892-9581 USA
| | - Gene-Jack Wang
- Laboratory of Neuroimaging, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, 10 Center Dr, Rm B2L124, Bethesda, MD 20892-1013 USA
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Jacobson A, Green E, Haase L, Szajer J, Murphy C. Differential Effects of BMI on Brain Response to Odor in Olfactory, Reward and Memory Regions: Evidence from fMRI. Nutrients 2019; 11:E926. [PMID: 31022978 PMCID: PMC6520683 DOI: 10.3390/nu11040926] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Revised: 04/18/2019] [Accepted: 04/18/2019] [Indexed: 01/10/2023] Open
Abstract
:Obesity has reached epidemic proportions, motivating research into the underlying mechanisms. Olfaction is a powerful mediator of food consumption, and obesity has been associated with altered olfactory sensitivity. The current study used an event-related functional magnetic resonance imaging (fMRI) to examine the central processing of odor in humans to gain insight into the effect of the body mass index (BMI) on the neural processes involved in rating the pleasantness of a food odor during a hunger state and in a satiety state. We hypothesized that, during the hedonic evaluation of food odor, BMI would be associated with differences in brain activation within olfactory and higher order processing areas important for perception, reward, and memory. We report novel findings of a dissociation between the relationship between BMI and activation in reward areas and in olfactory and odor memory areas, i.e., activation in reward areas decreased as BMI increased, whereas activation in primary olfactory and memory regions increased as BMI increased. A greater BMI is associated with decreased activation in the reward and frontal regions, supporting a blunted reward response in obesity. These findings have important potential implications for decision making, response inhibition, and reward-based behaviors that may play key roles as causal and maintenance factors in obesity. In contrast, a greater BMI is associated with an increased activation in the primary olfactory and memory areas, which was observed during a hunger state. These results raise the speculative hypothesis that high BMI may be associated with hyperactivation in the olfactory and memory areas, and that over time, the resulting excitotoxic effects may contribute to neurodegenerative changes in these areas.
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Affiliation(s)
- Aaron Jacobson
- Department of Psychology, San Diego State University, San Diego, CA 92182, USA.
| | - Erin Green
- San Diego State University/University of California San Diego Joint Doctoral Program in Clinical Psychology, San Diego, CA 92120, USA.
| | - Lori Haase
- San Diego State University/University of California San Diego Joint Doctoral Program in Clinical Psychology, San Diego, CA 92120, USA.
- Department of Psychiatry, University of California School of Medicine, San Diego, CA 92093, USA.
| | - Jacquelyn Szajer
- San Diego State University/University of California San Diego Joint Doctoral Program in Clinical Psychology, San Diego, CA 92120, USA.
| | - Claire Murphy
- Department of Psychology, San Diego State University, San Diego, CA 92182, USA.
- San Diego State University/University of California San Diego Joint Doctoral Program in Clinical Psychology, San Diego, CA 92120, USA.
- Department of Psychiatry, University of California School of Medicine, San Diego, CA 92093, USA.
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Thanarajah SE, Backes H, DiFeliceantonio AG, Albus K, Cremer AL, Hanssen R, Lippert RN, Cornely OA, Small DM, Brüning JC, Tittgemeyer M. Food Intake Recruits Orosensory and Post-ingestive Dopaminergic Circuits to Affect Eating Desire in Humans. Cell Metab 2019; 29:695-706.e4. [PMID: 30595479 DOI: 10.1016/j.cmet.2018.12.006] [Citation(s) in RCA: 59] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2018] [Revised: 05/18/2018] [Accepted: 12/04/2018] [Indexed: 01/07/2023]
Abstract
Pleasant taste and nutritional value guide food selection behavior. Here, orosensory features of food may be secondary to its nutritional value in underlying reinforcement, but it is unclear how the brain encodes the reward value of food. Orosensory and peripheral physiological signals may act together on dopaminergic circuits to drive food intake. We combined fMRI and a novel [11C]raclopride PET method to assess systems-level activation and dopamine release in response to palatable food intake in humans. We identified immediate orosensory and delayed post-ingestive dopamine release. Both responses recruit segregated brain regions: specialized integrative pathways and higher cognitive centers. Furthermore, we identified brain areas where dopamine release reflected the subjective desire to eat. Immediate dopamine release in these wanting-related regions was inversely correlated with, and presumably inhibited, post-ingestive release in the dorsal striatum. Our results highlight the role of brain and periphery in interacting to reinforce food intake in humans.
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Affiliation(s)
- Sharmili Edwin Thanarajah
- Max Planck Institute for Metabolism Research, Cologne, Germany; Department of Neurology, University Hospital of Cologne, Cologne, Germany
| | - Heiko Backes
- Max Planck Institute for Metabolism Research, Cologne, Germany.
| | - Alexandra G DiFeliceantonio
- Max Planck Institute for Metabolism Research, Cologne, Germany; Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA; Modern Diet and Physiology Research Center, New Haven, CT, USA; Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, USA
| | - Kerstin Albus
- Cologne Cluster of Excellence in Cellular Stress and Aging-Associated Disease (CECAD), Cologne, Germany
| | | | - Ruth Hanssen
- Max Planck Institute for Metabolism Research, Cologne, Germany; Center for Endocrinology, Diabetes and Preventive Medicine (CEPD), University Hospital of Cologne, Cologne, Germany
| | | | - Oliver A Cornely
- Cologne Cluster of Excellence in Cellular Stress and Aging-Associated Disease (CECAD), Cologne, Germany; Department I of Internal Medicine, University Hospital of Cologne, Cologne, Germany; Clinical Trials Centre Cologne (ZKS Köln), University of Cologne, Cologne, Germany
| | - Dana M Small
- Department of Psychiatry, Yale University School of Medicine, New Haven, CT, USA; Department of Psychology, Yale University, New Haven, CT, USA; Modern Diet and Physiology Research Center, New Haven, CT, USA
| | - Jens C Brüning
- Max Planck Institute for Metabolism Research, Cologne, Germany; Cologne Cluster of Excellence in Cellular Stress and Aging-Associated Disease (CECAD), Cologne, Germany; Center for Endocrinology, Diabetes and Preventive Medicine (CEPD), University Hospital of Cologne, Cologne, Germany
| | - Marc Tittgemeyer
- Max Planck Institute for Metabolism Research, Cologne, Germany; Cologne Cluster of Excellence in Cellular Stress and Aging-Associated Disease (CECAD), Cologne, Germany; Modern Diet and Physiology Research Center, New Haven, CT, USA
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Stice E, Burger K. Neural vulnerability factors for obesity. Clin Psychol Rev 2019; 68:38-53. [PMID: 30587407 PMCID: PMC6397091 DOI: 10.1016/j.cpr.2018.12.002] [Citation(s) in RCA: 97] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 10/05/2018] [Accepted: 12/17/2018] [Indexed: 01/09/2023]
Abstract
Multiple theories identify neural vulnerability factors that may increase risk for overeating and weight gain. Early cross-sectional neuroimaging studies were unable to determine whether aberrant neural responsivity was a risk factor for or a consequence of overeating. More recent obesity risk, prospective, repeated-measures, and experimental neuroimaging studies with humans have advanced knowledge of etiologic processes and neural plasticity resulting from overeating. Herein, we review evidence from these more rigorous human neuroimaging studies, in conjunction with behavioral measures reflecting neural function, as well as experiments with animals that investigated neural vulnerability theories for overeating. Findings provide support for the reward surfeit theory that posits that individuals at risk for obesity initially show hyper-responsivity of reward circuitry to high-calorie food tastes, which theoretically drives elevated intake of such foods. However, findings provide little support for the reward deficit theory that postulates that individuals at risk for obesity show an initial hypo-responsivity of reward circuitry that motives overeating. Further, results provide support for the incentive sensitization and dynamic vulnerability theories that propose that overconsumption of high-calorie foods results in increased reward and attention region responsivity to cues that are associated with hedonic reward from intake of these high-calorie foods via conditioning, as well as a simultaneous decrease in reward region responsivity to high-calorie food tastes. However, there is little evidence that this induced reduction in reward region response to high-calorie food tastes drives an escalation in overeating. Finally, results provide support for the theory that an initial deficit in inhibitory control and a bias for immediate reward contribute to overconsumption of high-calorie foods. Findings imply that interventions that reduce reward and attention region responsivity to food cues and increase inhibitory control should reduce overeating and excessive weight gain, an intervention theory that is receiving support in randomized trials.
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Affiliation(s)
- Eric Stice
- Oregon Research Institute, Eugene, OR, USA.
| | - Kyle Burger
- University of North Carolina, Chapel Hill, NC, USA
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Kakoschke N, Lorenzetti V, Caeyenberghs K, Verdejo-García A. Impulsivity and body fat accumulation are linked to cortical and subcortical brain volumes among adolescents and adults. Sci Rep 2019; 9:2580. [PMID: 30796265 PMCID: PMC6385240 DOI: 10.1038/s41598-019-38846-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2018] [Accepted: 01/10/2019] [Indexed: 12/31/2022] Open
Abstract
Obesity is associated not only with metabolic and physical health conditions, but with individual variations in cognition and brain health. This study examined the association between body fat (an index of excess weight severity), impulsivity (a vulnerability factor for obesity), and brain structure among adolescents and adults across the body mass index (BMI) spectrum. We used 3D T1 weighted anatomic magnetic resonance imaging scans to map the association between body fat and volumes in regions associated with obesity and impulsivity. Participants were 127 individuals (BMI: 18-40 kg/m2; M = 25.69 ± 5.15), aged 14 to 45 years (M = 24.79 ± 9.60; female = 64). Body fat was measured with bioelectric impendence technology, while impulsivity was measured with the UPPS-P Impulsive Behaviour Scale. Results showed that higher body fat was associated with larger cerebellar white matter, medial orbitofrontal cortex (OFC), and nucleus accumbens volume, although the latter finding was specific to adolescents. The relationship between body fat and medial OFC volume was moderated by impulsivity. Elevated impulsivity was also associated with smaller amygdala and larger frontal pole volumes. Our findings link vulnerability and severity markers of obesity with neuroanatomical measures of frontal, limbic and cerebellar structures, and unravel specific links between body fat and striatal volume in adolescence.
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Affiliation(s)
- Naomi Kakoschke
- School of Psychological Sciences & Monash Institute of Cognitive and Clinical Neurosciences, Monash University, Melbourne, Victoria, Australia
| | - Valentina Lorenzetti
- School of Psychology, Faculty of Health Sciences, Australian Catholic University, Melbourne, Victoria, Australia
| | - Karen Caeyenberghs
- Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Victoria, Australia
| | - Antonio Verdejo-García
- School of Psychological Sciences & Monash Institute of Cognitive and Clinical Neurosciences, Monash University, Melbourne, Victoria, Australia.
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31
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Adise S, Geier CF, Roberts NJ, White CN, Keller KL. Food or money? Children's brains respond differently to rewards regardless of weight status. Pediatr Obes 2019; 14:e12469. [PMID: 30239165 DOI: 10.1111/ijpo.12469] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2017] [Revised: 07/12/2018] [Accepted: 07/17/2018] [Indexed: 01/23/2023]
Abstract
BACKGROUND Brain responses to both food and monetary rewards have been linked to weight gain and obesity in adults, suggesting that general sensitivity to reward contributes to overeating. However, the relationship between brain reward response and body weight in children is unclear. OBJECTIVE The objective of this study was to assess the brain's response to multiple rewards and the relationship to body weight in children. METHODS We tested this by performing functional magnetic resonance imaging while children (7- to 11-years-old; healthy weight [n = 31], overweight/obese [n = 30]) played a modified card-guessing task to assess blood-oxygen-level-dependent (BOLD) response to anticipating and winning food and money rewards. Functional magnetic resonance imaging data were analysed using a region of interest and exploratory whole-brain approach. RESULTS Region of interest results demonstrated increased BOLD response in the striatum to anticipating food vs. neutral (control) and winning money vs. neutral. Whole-brain data showed that winning money vs. food was associated with increased activation in the striatum, as well as regions associated with cognitive control and emotion. Notably, for both approaches, these effects were independent of child weight status. Additionally, children's reported food responsiveness and emotional overeating were negatively correlated with the BOLD response in the left cingulate gyrus for winning food vs. money. CONCLUSION Overall, findings from this study show that regions associated with reward, cognitive control and emotion may play a role in the brain's response to food and money rewards, independently of how much the child weighs. These findings provide insight into reward sensitivity in children, which may have implications for understanding overeating and the development of obesity.
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Affiliation(s)
- S Adise
- Department of Nutritional Sciences, The Pennsylvania State University, University Park, PA, USA
| | - C F Geier
- Department of Human Development and Family Studies, The Pennsylvania State University, University Park, PA, USA
| | - N J Roberts
- Department of Human Development and Family Studies, The Pennsylvania State University, University Park, PA, USA
| | - C N White
- Department of Psychology, Missouri Western State University, St. Joseph, MO, USA
| | - K L Keller
- Department of Nutritional Sciences, The Pennsylvania State University, University Park, PA, USA.,Department of Food Science, The Pennsylvania State University, University Park, PA, USA
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Canna A, Prinster A, Fratello M, Puglia L, Magliulo M, Cantone E, Pirozzi MA, Di Salle F, Esposito F. A low-cost open-architecture taste delivery system for gustatory fMRI and BCI experiments. J Neurosci Methods 2019; 311:1-12. [PMID: 30308211 DOI: 10.1016/j.jneumeth.2018.10.003] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2018] [Revised: 09/29/2018] [Accepted: 10/05/2018] [Indexed: 12/24/2022]
Abstract
BACKGROUND Tasting is a complex process involving chemosensory perception and cognitive evaluation. Different experimental designs and solution delivery approaches may in part explain the variability reported in literature. These technical aspects certainly limit the development of taste-related brain computer interface devices. NEW METHOD We propose a novel modular, scalable and low-cost device for rapid injection of small volumes of taste solutions during fMRI experiments that gathers the possibility to flexibly increase the number of channels, allowing complex multi-dimensional taste experiments. We provide the full description of the hardware and software architecture and illustrate the application of the working prototype in single-subject event-related fMRI experiments by showing the BOLD responses to basic taste qualities and to five intensities of tastes during the course of perception. RESULTS The device is shown to be effective in activating multiple clusters within the gustatory pathway and a precise time-resolved event-related analysis is shown to be possible by the impulsive nature of the induced perception. COMPARISON WITH EXISTING METHOD(S) This gustometer represents the first implementation of a low-cost, easily replicable and portable device that is suitable for all kinds of fMRI taste experiments. Its scalability will boost the experimental design of more complex multi-dimensional fMRI studies of the human taste pathway. CONCLUSIONS The gustometer represents a valid open-architecture alternative to other available devices and its spread and development may contribute to an increased standardization of experimental designs in human fMRI studies of taste perception and pave the way to the development of novel taste-related BCIs.
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Affiliation(s)
- Antonietta Canna
- Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Baronissi, Salerno, Italy.
| | - Anna Prinster
- Biostructure and Bioimaging Institute, National Research Council, Naples, Italy
| | | | - Luca Puglia
- Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Baronissi, Salerno, Italy
| | - Mario Magliulo
- Biostructure and Bioimaging Institute, National Research Council, Naples, Italy
| | - Elena Cantone
- Section of ENT, Department of Neuroscience, "Federico II" University, Naples, Italy
| | | | - Francesco Di Salle
- Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Baronissi, Salerno, Italy; Department of Diagnostic Imaging, University Hospital "San Giovanni di Dio e Ruggi D'Aragona", Salerno, Italy
| | - Fabrizio Esposito
- Department of Medicine, Surgery and Dentistry, "Scuola Medica Salernitana", University of Salerno, Baronissi, Salerno, Italy; Department of Diagnostic Imaging, University Hospital "San Giovanni di Dio e Ruggi D'Aragona", Salerno, Italy
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Zhang Z, Coppin G. To What Extent Memory Could Contribute to Impaired Food Valuation and Choices in Obesity? Front Psychol 2018; 9:2523. [PMID: 30618948 PMCID: PMC6297373 DOI: 10.3389/fpsyg.2018.02523] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 11/27/2018] [Indexed: 12/17/2022] Open
Abstract
Obesity is associated with a diverse array of cognitive and affective deficits, among which impairments in food valuation and choices have received increasing attention. The neural underpinnings of such impairments, however, remain poorly understood, partly because a complete understanding of these processes under normal conditions has yet to be achieved. A rapidly growing literature on the interaction between memory and decision-making has begun to highlight the integral role of memory in decision making especially in the real world, as well as the role of the hippocampus in supporting flexible decision making. Perhaps not coincidentally, altered memory performances in obesity have been well documented, and the underlying neurobiological bases of these memory alterations have also started to be better described, involving pathologies at the biochemical, cellular, and circuit levels. Despite such correspondence, the link between memory impairments and food valuation/choice deficits in obesity has received little attention. In this article, we first summarize the growing empirical support for the relevance of memory for decision making, focusing on flexible value-based decisions. We then describe converging evidence on different forms of memory impairments accompanying obesity. Building on these findings, we formulate a general neuropsychological framework and discuss how dysfunctions in the formation and retrieval of memory may interfere with adaptive decision making for food. Finally, we stress the important practical implications of this framework, arguing that memory deficits are likely a significant contributor to suboptimal food purchase and eating behavior exhibited by obese individuals.
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Affiliation(s)
- Zhihao Zhang
- Haas School of Business, University of California, Berkeley, Berkeley, CA, United States.,Department of Neurology, University of California, San Francisco, San Francisco, CA, United States
| | - Géraldine Coppin
- Swiss Center for Affective Sciences, University of Geneva, Geneva, Switzerland.,Laboratory for the Study of Emotion Elicitation and Expression, Department of Psychology, University of Geneva, Geneva, Switzerland.,Department of Psychology, Distance Learning University Switzerland (Unidistance), Brig, Switzerland
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Decreased resting-state BOLD regional homogeneity and the intrinsic functional connectivity within dorsal striatum is associated with greater impulsivity in food-related decision-making and BMI change at 6-month follow up. Appetite 2018; 127:69-78. [DOI: 10.1016/j.appet.2018.04.024] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 04/02/2018] [Accepted: 04/26/2018] [Indexed: 01/26/2023]
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Stice E, Yokum S. Effects of gymnemic acids lozenge on reward region response to receipt and anticipated receipt of high-sugar food. Physiol Behav 2018; 194:568-576. [PMID: 30031752 DOI: 10.1016/j.physbeh.2018.07.012] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 07/11/2018] [Accepted: 07/16/2018] [Indexed: 10/28/2022]
Abstract
A gymnemic acids lozenge that blocks sweet taste receptors reduced the decision to consume candy in humans even before the candy was tasted after the gymnemic acids dose, suggesting that blocking sweet taste receptors reduces valuation of sweet foods. The present study used functional magnetic resonance imaging (fMRI) to test whether the gymnemic acids lozenge reduces reward region response to both intake and anticipated intake of high-sugar food, as well as ad lib candy intake relative to a placebo lozenge. Here we show for the first time that a gymnemic acids lozenge versus placebo lozenge significantly reduced activation in the striatum and orbitofrontal cortex in response to anticipated tastes of high-sugar milkshake, and significantly reduced dorsolateral prefrontal cortex response to tastes of milkshake. We also replicated evidence that a gymnemic acids lozenge versus placebo lozenge significantly reduced ad lib candy intake. Results also provide novel evidence that an initial taste of a high-sugar food increases reward region (i.e., caudate) response to anticipated intake of more of the high-sugar food. Results suggest that blocking sweet taste receptors not only reduces reward region response to intake of high-sugar foods, but also reduces anticipated reward from high-sugar foods, potentially via a feedback loop regarding the availability of sweet taste receptors to convey perceptual input regarding sweet tastes. Collectively, results imply that the gymnemic acids lozenge might prove useful in decreasing high-sugar food intake.
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Affiliation(s)
- Eric Stice
- Oregon Research Institute, 1776 Millrace Drive, Eugene, OR 97403, United States.
| | - Sonja Yokum
- Oregon Research Institute, 1776 Millrace Drive, Eugene, OR 97403, United States
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Adise S, Geier CF, Roberts NJ, White CN, Keller KL. Is brain response to food rewards related to overeating? A test of the reward surfeit model of overeating in children. Appetite 2018; 128:167-179. [PMID: 29890186 DOI: 10.1016/j.appet.2018.06.014] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2018] [Revised: 05/15/2018] [Accepted: 06/07/2018] [Indexed: 01/18/2023]
Abstract
The reward surfeit model of overeating suggests that heightened brain response to rewards contributes to overeating and subsequent weight gain. However, previous studies have not tested whether brain response to reward is associated with food intake, particularly during childhood, a period of dynamic development in reward and inhibitory control neurocircuitry. We conducted functional magnetic resonance imaging (fMRI) with 7-11-year-old children (n = 59; healthy weight, n = 31; overweight, n = 28; 54% female) while they played a modified card-guessing paradigm to examine blood-oxygen-level-dependent (BOLD) response to anticipating and winning rewards (food, money, neutral). Food intake was assessed at three separate meals that measured different facets of eating behavior: 1) typical consumption (baseline), 2) overindulgence (palatable buffet), and 3) eating in the absence of hunger (EAH). A priori regions of interest included regions implicated in both reward processing and inhibitory control. Multiple stepwise regressions were conducted to examine the relationship between intake and BOLD response to rewards. Corrected results showed that a greater BOLD response in the medial prefrontal cortex for anticipating food compared to money positively correlated with how much children ate at the baseline and palatable buffet meals. BOLD response in the dorsolateral prefrontal cortex for winning food compared to money was positively correlated with intake at the palatable buffet meal and EAH. All aforementioned relationships were independent of child weight status. Findings support the reward surfeit model by showing that increased brain response to food compared to money rewards positively correlates with laboratory measures of food intake in children.
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Affiliation(s)
- Shana Adise
- Department of Nutritional Sciences, The Pennsylvania State University, 110 Chandlee Laboratory, University Park, PA, 16802, USA
| | - Charles F Geier
- Department of Human Development and Family Studies, The Pennsylvania State University, 119 Health and Human Development Bldg, University Park, PA, 16802, USA
| | - Nicole J Roberts
- Department of Human Development and Family Studies, The Pennsylvania State University, 119 Health and Human Development Bldg, University Park, PA, 16802, USA
| | - Corey N White
- Department of Psychology, Missouri Western State University, Murphy Hall 217, St. Joseph, MO, 64507, USA
| | - Kathleen L Keller
- Department of Nutritional Sciences, The Pennsylvania State University, 110 Chandlee Laboratory, University Park, PA, 16802, USA; Department of Food Science, The Pennsylvania State University, 202 Rodney A. Erickson Food Science Building, University Park, PA, 16802, USA.
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Gilbert JR, Stice E, Burger KS. Elevated Thalamic Response to High-Sugar Milkshake in Ethnic and Racial Minorities. J Racial Ethn Health Disparities 2018; 5:580-587. [PMID: 28779478 PMCID: PMC5797505 DOI: 10.1007/s40615-017-0403-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2017] [Revised: 06/07/2017] [Accepted: 06/23/2017] [Indexed: 10/19/2022]
Abstract
In the USA, Hispanics and African-Americans show elevated obesity, yet little is known about possible ethnic/racial differences in brain response during intake of palatable foods. To examine potential differences between non-Hispanic white (nHW) and racial/ethnic minority individuals, we used functional magnetic resonance imaging (fMRI) to assess brain response to intake of eucaloric milkshakes that were either high-sugar or high-fat and a calorie-free, tasteless control solution. Our sample included healthy-weight adolescents who identified as African-American and/or Hispanic (minority, n = 27) and non-Hispanic white (nHW, n = 106). Minority participants showed elevated response in the pre-/postcentral gyrus, precuneus, and left thalamus in response to the high-sugar milkshake compared to high-fat milkshake. To confirm these effects were not driven by differences in body mass or a function of unequal cell sizes, we performed the same analyses in minority participants and a randomly selected subsample of nHW participants (n = 27) that were matched on BMI percentile. Similar to the full sample, we observed an elevated ventral posterior thalamic response to high-sugar milkshake in minority participants. This effect held after controlling for self-reported sugar and fat intake. These results suggest that African-American and Hispanic groups may have elevated response to specifically high-sugar foods in regions of the brain associated with sensory processing, providing novel information regarding the possible neural underpinnings of the disproportional risk for obesity seen in African-American and Hispanic populations.
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Affiliation(s)
- Jennifer R Gilbert
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, 135 Dauer Drive, Chapel Hill, NC, 27599, USA
| | - Eric Stice
- Oregon Research Institute, 1776 Millrace Dr, Eugene, OR, 97403, USA
| | - Kyle S Burger
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, 135 Dauer Drive, Chapel Hill, NC, 27599, USA.
- Biomedical Imaging Research Center, UNC School of Medicine, 125 Mason Farm Road, Chapel Hill, NC, 27599, USA.
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Novelle MG, Diéguez C. Food Addiction and Binge Eating: Lessons Learned from Animal Models. Nutrients 2018; 10:E71. [PMID: 29324652 PMCID: PMC5793299 DOI: 10.3390/nu10010071] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2017] [Revised: 12/26/2017] [Accepted: 01/09/2018] [Indexed: 01/10/2023] Open
Abstract
The feeding process is required for basic life, influenced by environment cues and tightly regulated according to demands of the internal milieu by regulatory brain circuits. Although eating behaviour cannot be considered "addictive" under normal circumstances, people can become "addicted" to this behaviour, similarly to how some people are addicted to drugs. The symptoms, cravings and causes of "eating addiction" are remarkably similar to those experienced by drug addicts, and both drug-seeking behaviour as eating addiction share the same neural pathways. However, while the drug addiction process has been highly characterised, eating addiction is a nascent field. In fact, there is still a great controversy over the concept of "food addiction". This review aims to summarize the most relevant animal models of "eating addictive behaviour", emphasising binge eating disorder, that could help us to understand the neurobiological mechanisms hidden under this behaviour, and to improve the psychotherapy and pharmacological treatment in patients suffering from these pathologies.
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Affiliation(s)
- Marta G Novelle
- Department of Physiology, Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de Compostela-Instituto de Investigación Sanitaria (IDIS), CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, 15786 Santiago de Compostela, Spain.
| | - Carlos Diéguez
- Department of Physiology, Center for Research in Molecular Medicine and Chronic Diseases (CIMUS), University of Santiago de Compostela-Instituto de Investigación Sanitaria (IDIS), CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Instituto de Salud Carlos III, 15786 Santiago de Compostela, Spain.
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A High-fat, High-sugar 'Western' Diet Alters Dorsal Striatal Glutamate, Opioid, and Dopamine Transmission in Mice. Neuroscience 2017; 372:1-15. [PMID: 29289718 DOI: 10.1016/j.neuroscience.2017.12.036] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Revised: 11/28/2017] [Accepted: 12/20/2017] [Indexed: 12/13/2022]
Abstract
Understanding neuroadaptations involved in obesity is critical for developing new approaches to treatment. Diet-induced neuroadaptations within the dorsal striatum have the capacity to drive excessive food seeking and consumption. Five-week-old C57BL/6J mice consumed a high-fat, high-sugar 'western diet' (WD) or a control 'standard diet' (SD) for 16 weeks. Weight gain, glucose tolerance, and insulin tolerance were measured to confirm an obese-like state. Following these 16 weeks, electrophysiological recordings were made from medium spiny neurons (MSNs) in the medial (DMS) and lateral (DLS) portions of dorsal striatum to evaluate diet effects on neuronal excitability and synaptic plasticity. In addition, fast-scan cyclic voltammetry evaluated dopamine transmission in these areas. WD mice gained significantly more weight and consumed more calories than SD mice and demonstrated impaired glucose tolerance. Electrophysiology data revealed that MSNs from WD mice demonstrated increased AMPA-to-NMDA receptor current ratio and prolonged spontaneous glutamate-mediated currents, specifically in the DLS. Evoked dopamine release was also significantly greater and reuptake slower in both subregions of WD striatum. Finally, dorsal striatal MSNs from WD mice were significantly less likely to demonstrate mu-opioid receptor-mediated synaptic plasticity. Neuronal excitability and GABAergic transmission were unaffected by diet in either striatal subregion. Our results demonstrate that a high-fat, high-sugar diet alters facets of glutamate, dopamine, and opioid signaling within the dorsal striatum, with some subregion specificity. These alterations within a brain area known to play a role in food motivation/consumption and habitual behavior are highly relevant for the clinical condition of obesity and its treatment.
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Eckstrand KL, Mummareddy N, Kang H, Cowan R, Zhou M, Zald D, Silver HJ, Niswender KD, Avison MJ. An insulin resistance associated neural correlate of impulsivity in type 2 diabetes mellitus. PLoS One 2017; 12:e0189113. [PMID: 29228027 PMCID: PMC5724830 DOI: 10.1371/journal.pone.0189113] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2017] [Accepted: 11/20/2017] [Indexed: 02/06/2023] Open
Abstract
Central insulin resistance (IR) influences striatal dopamine (DA) tone, an important determinant of behavioral self-regulation. We hypothesized that an association exists between the degree of peripheral IR and impulse control, mediated by the impact of IR on brain circuits controlling the speed of executing “go” and/or “stop” responses. We measured brain activation and associated performance on a stop signal task (SST) in obese adults with type 2 diabetes (age, 48.1 ± 6.9 yrs (mean ± SD); BMI, 36.5 ± 4.0 kg/m2; HOMA-IR, 7.2 ± 4.1; 12 male, 18 female). Increasing IR, but not BMI, was a predictor of shorter critical stop signal delay (cSSD), a measure of the time window during which a go response can be successfully countermanded (R2 = 0.12). This decline was explained by an IR-associated increase in go speed (R2 = 0.13) with little impact of IR or BMI on stop speed. Greater striatal fMRI activation contrast in stop error (SE) compared with stop success (SS) trials (CONSE>SS) was a significant predictor of faster go speeds (R2 = 0.33, p = 0.002), and was itself predicted by greater IR (CONSE>SS vs HOMA-IR: R2 = 0.10, p = 0.04). Furthermore, this impact of IR on striatal activation was a significant mediator of the faster go speeds and greater impulsivity observed with greater IR. These findings suggest a neural mechanism by which IR may increase impulsivity and degrade behavioral self-regulation.
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Affiliation(s)
- Kristen L. Eckstrand
- Department of Radiology, Vanderbilt University Medical Center, Nashville, TN, United States of America
| | - Nishit Mummareddy
- Department of Radiology, Vanderbilt University Medical Center, Nashville, TN, United States of America
| | - Hakmook Kang
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN, United States of America
| | - Ronald Cowan
- Department of Psychiatry, Vanderbilt University Medical Center, Nashville, TN, United States of America
| | - Minchun Zhou
- Department of Biostatistics, Vanderbilt University Medical Center, Nashville, TN, United States of America
| | - David Zald
- Department of Psychology, Vanderbilt University Medical Center, Nashville, TN, United States of America
| | - Heidi J. Silver
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, United States of America
| | - Kevin D. Niswender
- Department of Medicine, Vanderbilt University Medical Center, Nashville, TN, United States of America
| | - Malcolm J. Avison
- Department of Radiology, Vanderbilt University Medical Center, Nashville, TN, United States of America
- * E-mail:
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Dunn JP, Abumrad NN, Kessler RM, Patterson BW, Li R, Marks-Shulman P, Tamboli RA. Caloric Restriction-Induced Decreases in Dopamine Receptor Availability are Associated with Leptin Concentration. Obesity (Silver Spring) 2017; 25:1910-1915. [PMID: 28944597 PMCID: PMC5718041 DOI: 10.1002/oby.22023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2017] [Revised: 08/16/2017] [Accepted: 08/21/2017] [Indexed: 11/08/2022]
Abstract
OBJECTIVE It has been previously reported that early after Roux-en-Y-gastric bypass, dopamine (DA) type 2 and 3 receptor (D2/3R) binding potential (BPND ) was decreased from preoperative levels. The current study aimed to determine whether calorie restriction without weight loss modifies D2/3R BPND and whether such changes are explained by neuroendocrine regulation. METHODS Fifteen females with obesity (BMI = 39 ± 6 kg/m2 ) were studied before and after ∼10 days of a very-low-calorie-diet (VLCD). Outcome measures included fasting insulin, leptin, acyl ghrelin, and glucose, and insulin sensitivity and disposition index were estimated using the oral-minimal model (OMM) method. Participants underwent positron emission tomography scanning with the displaceable radioligand [18 F]fallypride to estimate available regional D2/3R levels. Regions of interest included the caudate, putamen, ventral striatum, hypothalamus, and substantia nigra (SN). RESULTS With the VLCD, weight decreased slightly (-3 kg). Insulin, glucose, and leptin decreased significantly, but there was no change in acyl ghrelin or measures from OMM. SN D2/3R BPND decreased significantly, with trends toward decreased levels in the remaining regions. The decrease in leptin concentration strongly predicted the change in D2/3R BPND in all regions (all P ≤ 0.004). CONCLUSIONS In obesity, reductions in regional D2/3R availability after VLCD are suggestive of increased endogenous DA competing with the radioligand. Changes in regional D2/3R availability were associated with decreases in leptin concentrations that occurred before clinically significant weight loss.
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Affiliation(s)
- Julia P. Dunn
- Department of Medicine, Vanderbilt University School of Medicine, Nashville, Tennessee, U.S.A
- Veterans Administration St. Louis Health Care System, St. Louis, Missouri, U.S.A
| | - Naji N. Abumrad
- Department of Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee, U.S.A
| | - Robert M. Kessler
- Department of Radiology, Vanderbilt University School of Medicine, Nashville, Tennessee, U.S.A
| | - Bruce W. Patterson
- Department of Medicine, Washington University School of Medicine, St. Louis, Missouri, U.S.A
| | - Rui Li
- Department of Radiology, Vanderbilt University School of Medicine, Nashville, Tennessee, U.S.A
| | - Pamela Marks-Shulman
- Department of Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee, U.S.A
| | - Robyn A. Tamboli
- Department of Surgery, Vanderbilt University School of Medicine, Nashville, Tennessee, U.S.A
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Food-Related Impulsivity in Obesity and Binge Eating Disorder-A Systematic Update of the Evidence. Nutrients 2017; 9:nu9111170. [PMID: 29077027 PMCID: PMC5707642 DOI: 10.3390/nu9111170] [Citation(s) in RCA: 134] [Impact Index Per Article: 19.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Revised: 10/24/2017] [Accepted: 10/24/2017] [Indexed: 12/19/2022] Open
Abstract
The specific eating pattern of Binge Eating Disorder (BED) patients has provoked the assumption that BED might represent a phenotype within the obesity spectrum that is characterized by increased impulsivity. Following the guidelines of the PRISMA statement (preferred reporting items for systematic reviews and meta-analyses), we here provide a systematic update on the evidence on food-related impulsivity in obese individuals, with and without BED, as well as normal-weight individuals. We separately analyzed potential group differences in the impulsivity components of reward sensitivity and rash-spontaneous behavior. Our search resulted in twenty experimental studies with high methodological quality. The synthesis of the latest evidence consolidates conclusions drawn in our initial systematic review that BED represents a distinct phenotype within the obesity spectrum that is characterized by increased impulsivity. Rash-spontaneous behavior in general, and specifically towards food, is increased in BED, while food-specific reward sensitivity is also increased in obese individuals without BED, but potentially to a lesser degree. A major next step for research entails the investigation of sub-domains and temporal components of inhibitory control in BED and obesity. Based on the evidence of impaired inhibitory control in BED, affected patients might profit from interventions that address impulsive behavior.
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Gardiner CK, YorkWilliams SL, Bryan AD, Hutchison KE. Body mass is positively associated with neural response to sweet taste, but not alcohol, among drinkers. Behav Brain Res 2017; 331:131-134. [PMID: 28549645 DOI: 10.1016/j.bbr.2017.05.046] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Revised: 05/09/2017] [Accepted: 05/17/2017] [Indexed: 11/19/2022]
Abstract
Obesity is a large and growing public health concern, presenting enormous economic and health costs to individuals and society. A burgeoning literature demonstrates that overweight and obese individuals display different neural processing of rewarding stimuli, including caloric substances, as compared to healthy weight individuals. However, much extant research on the neurobiology of obesity has focused on addiction models, without highlighting potentially separable neural underpinnings of caloric intake versus substance use. The present research explores these differences by examining neural response to alcoholic beverages and a sweet non-alcoholic beverage, among a sample of individuals with varying weight status and patterns of alcohol use and misuse. Participants received tastes of a sweet beverage (litchi juice) and alcoholic beverages during fMRI scanning. When controlling for alcohol use, elevated weight status was associated with increased activation in response to sweet taste in regions including the cingulate cortex, hippocampus, precuneus, and fusiform gyrus. However, weight status was not associated with neural response to alcoholic beverages.
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Affiliation(s)
- Casey K Gardiner
- Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, CO, 80309, USA.
| | - Sophie L YorkWilliams
- Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, CO, 80309, USA.
| | - Angela D Bryan
- Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, CO, 80309, USA.
| | - Kent E Hutchison
- Department of Psychology and Neuroscience, University of Colorado Boulder, Boulder, CO, 80309, USA.
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Tiedemann LJ, Schmid SM, Hettel J, Giesen K, Francke P, Büchel C, Brassen S. Central insulin modulates food valuation via mesolimbic pathways. Nat Commun 2017; 8:16052. [PMID: 28719580 PMCID: PMC5520049 DOI: 10.1038/ncomms16052] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 05/18/2017] [Indexed: 01/21/2023] Open
Abstract
Central insulin is thought to act at the neural interface between metabolic and hedonic drives to eat. Here, using pharmacological fMRI, we show that intranasal insulin (INI) changes the value of food cues through modulation of mesolimbic pathways. Overnight fasted participants rated the palatability of food pictures and attractiveness of non-food items (control) after receiving INI or placebo. We report that INI reduces ratings of food palatability and value signals in mesolimbic regions in individuals with normal insulin sensitivity. Connectivity analyses reveal insulinergic inhibition of forward projections from the ventral tegmentum to the nucleus accumbens. Importantly, the strength of this modulation predicts decrease of palatability ratings, directly linking neural findings to behaviour. In insulin-resistant participants however, we observe reduced food values and aberrant central insulin action. These data demonstrate how central insulin modulates the cross-talk between homeostatic and non-homeostatic feeding systems, suggesting that dysfunctions of these neural interactions may promote metabolic disorders. The influence of insulin on food preference and the corresponding underlying neural circuits are unknown in humans. Here, the authors show that increasing insulin changes food preference by modulating mesolimbic neural circuits, and that this pattern is changed in insulin-resistant individuals.
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Affiliation(s)
- Lena J Tiedemann
- Department of Systems Neuroscience, University Medical Centre Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany
| | - Sebastian M Schmid
- Department of Internal Medicine I, University Hospital Lübeck, Ratzeburger Allee 160, D-23538 Lübeck, Germany.,German Center for Diabetes Research (DZD), Ratzeburger Allee 160, D-23538 Lübeck, Germany
| | - Judith Hettel
- Department of Systems Neuroscience, University Medical Centre Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany
| | - Katrin Giesen
- Department of Systems Neuroscience, University Medical Centre Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany
| | - Paul Francke
- Department of Systems Neuroscience, University Medical Centre Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany
| | - Christian Büchel
- Department of Systems Neuroscience, University Medical Centre Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany
| | - Stefanie Brassen
- Department of Systems Neuroscience, University Medical Centre Hamburg-Eppendorf, Martinistrasse 52, D-20246 Hamburg, Germany
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46
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Gain in Body Fat Is Associated with Increased Striatal Response to Palatable Food Cues, whereas Body Fat Stability Is Associated with Decreased Striatal Response. J Neurosci 2017; 36:6949-56. [PMID: 27358453 DOI: 10.1523/jneurosci.4365-15.2016] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Accepted: 05/23/2016] [Indexed: 02/03/2023] Open
Abstract
UNLABELLED Cross-sectional brain-imaging studies reveal that obese versus lean humans show greater responsivity of reward and attention regions to palatable food cues, but lower responsivity of reward regions to palatable food receipt. However, these individual differences in responsivity may result from a period of overeating. We conducted a repeated-measures fMRI study to test whether healthy weight adolescent humans who gained body fat over a 2 or 3 year follow-up period show an increase in responsivity of reward and attention regions to a cue signaling impending milkshake receipt and a simultaneous decrease in responsivity of reward regions to milkshake receipt versus adolescents who showed stability of or loss of body fat. Adolescents who gained body fat, who largely remained in a healthy weight range, showed increases in activation in the putamen, mid-insula, Rolandic operculum, and precuneus to a cue signaling impending milkshake receipt versus those who showed stability of or loss of body fat, though these effects were partially driven by reductions in responsivity among the latter groups. Adolescents who gained body fat reported significantly greater milkshake wanting and milkshake pleasantness ratings at follow-up compared to those who lost body fat. Adolescents who gained body fat did not show a reduction in responsivity of reward regions to milkshake receipt or changes in responsivity to receipt and anticipated receipt of monetary reward. Data suggest that initiating a prolonged period of overeating may increase striatal responsivity to food cues, and that maintaining a balance between caloric intake and expenditure may reduce striatal, insular, and Rolandic operculum responsivity. SIGNIFICANCE STATEMENT This novel, repeated-measures brain-imaging study suggests that adolescents who gained body fat over our follow-up period experienced an increase in striatal responsivity to cues for palatable foods compared to those who showed stability of or loss of body fat. Results also imply that maintaining a balance between caloric intake and expenditure over time may reduce striatal, insular, and Rolandic operculum responsivity to food cues, which might decrease risk for future overeating.
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Pathological Overeating: Emerging Evidence for a Compulsivity Construct. Neuropsychopharmacology 2017; 42:1375-1389. [PMID: 27922596 PMCID: PMC5436113 DOI: 10.1038/npp.2016.269] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2016] [Revised: 11/18/2016] [Accepted: 11/22/2016] [Indexed: 12/11/2022]
Abstract
Compulsive eating behavior is a transdiagnostic construct that is characteristic of medical and psychiatric conditions such as forms of obesity and eating disorders. Although feeding research is moving toward a better understanding of the proposed addictive properties of food, the components and the mechanisms contributing to compulsive eating are not yet clearly defined or understood. Current understanding highlights three elements of compulsive behavior as it applies to pathological overeating: (1) habitual overeating; (2) overeating to relieve a negative emotional state; and (3) overeating despite aversive consequences. These elements emerge through mechanisms involving pathological habit formation through an aberrant learning process, the emergence of a negative emotional state, and dysfunctions in behavioral control. Dysfunctions in systems within neurocircuitries that comprise the basal ganglia, the extended amygdala, and the prefrontal cortex result in compulsive eating behaviors. Here, we present evidence to relate compulsive eating behavior and addiction and to characterize their underlying neurobiological mechanisms. A major need to improve understanding of compulsive eating through the integration of complex motivational, emotional, and cognitive constructs is warranted.
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48
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Sun X, Luquet S, Small DM. DRD2: Bridging the Genome and Ingestive Behavior. Trends Cogn Sci 2017; 21:372-384. [PMID: 28372879 DOI: 10.1016/j.tics.2017.03.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 02/10/2017] [Accepted: 03/06/2017] [Indexed: 12/26/2022]
Abstract
Recent work highlights the importance of genetic variants that influence brain structure and function in conferring risk for polygenic obesity. The neurotransmitter dopamine (DA) has a pivotal role in energy balance by integrating metabolic signals with circuits supporting cognitive, perceptual, and appetitive functions that guide feeding. It has also been established that diet and obesity alter DA signaling, leading to compulsive-like feeding and neurocognitive impairments. This raises the possibility that genetic variants that influence DA signaling and adaptation confer risk for overeating and cognitive decline. Here, we consider the role of two common gene variants, FTO and TaqIA rs1800497 in driving gene × environment interactions promoting obesity, metabolic dysfunction, and cognitive change via their influence on DA receptor subtype 2 (DRD2) signaling.
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Affiliation(s)
- Xue Sun
- Department of Psychology, University of Pennsylvania, Philadelphia, PA, USA
| | - Serge Luquet
- Université Paris Diderot, Sorbonne Paris Cité, BFA CNRS UMR 8251, Paris, France; Modern Diet and Physiology Research Center, New Haven, CT, USA
| | - Dana M Small
- Modern Diet and Physiology Research Center, New Haven, CT, USA; The John B. Pierce Laboratory, 290 Congress Avenue, New Haven, CT, USA; Department of Psychiatry, Yale School of Medicine, New Haven, CT, USA; Department of Psychology, Yale University, New Haven, CT, USA.
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49
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Association between Impulsivity and Weight Status in a General Population. Nutrients 2017; 9:nu9030217. [PMID: 28257032 PMCID: PMC5372880 DOI: 10.3390/nu9030217] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2017] [Revised: 02/20/2017] [Accepted: 02/24/2017] [Indexed: 01/09/2023] Open
Abstract
The objective of this study is to examine the association between impulsivity and weight status in a large sample of the adult general population in France, and the influence of gender on this relationship. A total of 11,929 men and 39,114 women participating in the NutriNet-Santé cohort were selected in this cross-sectional analysis. The Barratt Impulsiveness Scale (BIS-11) was used to assess impulsivity. Weight and height were self-reported. The association between impulsivity and BMI was estimated using logistic regressions adjusted for socio-demographic and lifestyle factors. Individuals with high impulsivity levels (BIS-11 total score >71) were more likely to be obese (Odds Ratio (OR) = 1.80, 95% Confidence Interval (CI): 1.39, 2.33 in men; OR = 1.30, 95% CI: 1.15, 1.48 in women) compared to individuals in the average range of impulsivity. The strongest associations between impulsivity and obesity were observed in men, where highly impulsive participants were more likely to be class III obese (BMI > 40 kg/m2) (OR = 3.57, 95% CI: 1.86, 6.85). This large sample analysis supports the existence of a relationship between impulsivity and weight status and the importance of psychological factors in the prevention of obesity.
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50
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Geha P, Cecchi G, Todd Constable R, Abdallah C, Small DM. Reorganization of brain connectivity in obesity. Hum Brain Mapp 2016; 38:1403-1420. [PMID: 27859973 DOI: 10.1002/hbm.23462] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2016] [Revised: 10/27/2016] [Accepted: 11/01/2016] [Indexed: 12/24/2022] Open
Abstract
Global brain connectivity (GBC) identifies regions of the brain, termed "hubs," which are densely connected and metabolically costly, and have a wide influence on brain function. Since obesity is associated with central and peripheral metabolic dysfunction we sought to determine if GBC is altered in obesity. Two independent fMRI data sets were subjected to GBC analyses. The first data set was acquired while participants (n = 15 healthy weight and 15 obese) tasted milkshake and the second with participants at rest (n = 33 healthy weight and 28 obese). In the resting state and during milkshake consumption GBC is consistently decreased in the ventromedial and ventrolateral prefrontal cortex, insula and caudate nucleus, and increased in brain regions belonging to the dorsal attention network including premotor areas, superior parietal lobule, and visual cortex. During milkshake consumption, but not at rest, additional decreases in GBC are observed in feeding-related circuitry including the insula, amygdala, anterior hippocampus, hypothalamus, midbrain, brainstem and somatomotor cortex. Additionally, GBC differences were not accounted for by age. These results demonstrate that obesity is associated with decreased GBC in prefrontal and feeding circuits and increased GBC in the dorsal attention network. We therefore conclude that global brain organization is altered in obesity to favor networks important for external orientation over those monitoring homeostatic state and guiding feeding decisions. Furthermore, since prefrontal decreases are also observed at rest in obese individuals future work should evaluate whether these changes are associated with neurocognitive impairments frequently observed in obesity and diabetes. Hum Brain Mapp 38:1403-1420, 2017. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Paul Geha
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut.,The John B. Pierce Laboratory, New Haven, Connecticut
| | | | - R Todd Constable
- Diagnostic Radiology, Yale University School of Medicine, New Haven, Connecticut
| | - Chadi Abdallah
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut
| | - Dana M Small
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut.,The John B. Pierce Laboratory, New Haven, Connecticut.,Department of Psychology, Yale University, New Haven, Connecticut
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