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Dumith SC, Martins OPL, Moreira MKV, Paulitsch RG, Simões MO, Marmitt LP, Silva PEA, Silva MP. Is the increment of diabetes mellitus in Brazil associated with the consumption of artificially sweetened beverages? A time trend analysis with 757,386 adults from 2006 to 2020. Public Health 2023; 221:66-72. [PMID: 37421755 DOI: 10.1016/j.puhe.2023.06.004] [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: 02/15/2023] [Revised: 05/19/2023] [Accepted: 06/06/2023] [Indexed: 07/10/2023]
Abstract
OBJECTIVE To describe trends in the prevalence of diabetes mellitus (DM) in Brazil and to analyze its association with the consumption of artificially sweetened beverages among individuals aged 18 years or older. STUDY DESIGN This was a repeated cross-sectional study. METHODS Annual data from VIGITEL surveys (2006-2020) were used, which included adults from all Brazilian state capitals. The outcome was the prevalence of DM (type 1 and type 2). The main exposure variable was consuming beverages like soft drinks and artificial juices, either in its 'diet, light, or zero' form. Covariates included sex, age, sociodemographic characteristics, smoking, alcohol consumption, physical activity, fruit consumption, and obesity. The temporal trend in the indicators and the etiological fraction (population attributable risk [PAR]) were calculated. Analyses were performed using Poisson regression. The association between DM and consumption of beverages was tested, excluding the year 2020 due to the pandemic; restricting the analysis to the final three years (2018-2020). RESULTS Overall, 757,386 subjects were included. The prevalence of DM increased from 5.5% to 8.2%, with an annual growth of 0.17 percentage points (95% CI 0.11-0.24). Among those who consumed diet/light/zero beverages, the annual percentage change of DM was four times greater. The PAR corresponding to the consumption of diet/light/zero beverages on the occurrence of DM was 17%. CONCLUSIONS An increasing prevalence of DM was observed, while diet/light/zero beverages consumption remains stable. A substantial reduction in the annual percentage change of DM could be observed if people stopped consuming diet/light soda/juice.
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Affiliation(s)
- S C Dumith
- Postgraduate Program in Health Sciences, Universidade Federal de Rio Grande. Rio Grande, RS, CEP: 96203-900, Brazil; Grupo de Pesquisa em Atividade Física e Saúde Pública, Universidade Federal do Rio Grande, Rio Grande, RS, CEP: 96203-900, Brazil
| | - O P L Martins
- Postgraduate Program in Health Sciences, Universidade Federal de Rio Grande. Rio Grande, RS, CEP: 96203-900, Brazil; Grupo de Pesquisa em Atividade Física e Saúde Pública, Universidade Federal do Rio Grande, Rio Grande, RS, CEP: 96203-900, Brazil
| | - M K V Moreira
- Grupo de Pesquisa em Atividade Física e Saúde Pública, Universidade Federal do Rio Grande, Rio Grande, RS, CEP: 96203-900, Brazil; Postgraduate Program in Epidemiology, Universidade Federal de Pelotas, Pelotas, RS, CEP: 96020-220, Brazil
| | - R G Paulitsch
- Grupo de Pesquisa em Atividade Física e Saúde Pública, Universidade Federal do Rio Grande, Rio Grande, RS, CEP: 96203-900, Brazil; Empresa Brasileira de Serviços Hospitalares, Universidade Federal do Rio Grande, Rio Grande, RS, CEP: 96203-900, Brazil
| | - M O Simões
- Grupo de Pesquisa em Atividade Física e Saúde Pública, Universidade Federal do Rio Grande, Rio Grande, RS, CEP: 96203-900, Brazil; Universidade Vale do Rio Doce, Governador Valadares, MG, CEP: 35020-220, Brazil
| | - L P Marmitt
- Grupo de Pesquisa em Atividade Física e Saúde Pública, Universidade Federal do Rio Grande, Rio Grande, RS, CEP: 96203-900, Brazil; Postgraduate Program in Biosciences and Health, Universidade do Oeste de Santa Catarina, Joaçaba, SC, CEP: 89600-000, Brazil.
| | - P E A Silva
- Postgraduate Program in Health Sciences, Universidade Federal de Rio Grande. Rio Grande, RS, CEP: 96203-900, Brazil
| | - M P Silva
- Postgraduate Program in Health Sciences, Universidade Federal de Rio Grande. Rio Grande, RS, CEP: 96203-900, Brazil; Grupo de Pesquisa em Atividade Física e Saúde Pública, Universidade Federal do Rio Grande, Rio Grande, RS, CEP: 96203-900, Brazil
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Baugh ME, DiFeliceantonio AG. Obesity impairs brain responses to nutrients. Nat Metab 2023:10.1038/s42255-023-00822-x. [PMID: 37308723 DOI: 10.1038/s42255-023-00822-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 06/14/2023]
Affiliation(s)
- Mary Elizabeth Baugh
- Fralin Biomedical Research Institute at VTC, Roanoke, VA, USA
- Center for Health Behaviors Research, Fralin Biomedical Research Institute at VTC, Roanoke, VA, USA
| | - Alexandra G DiFeliceantonio
- Fralin Biomedical Research Institute at VTC, Roanoke, VA, USA.
- Center for Health Behaviors Research, Fralin Biomedical Research Institute at VTC, Roanoke, VA, USA.
- Department of Human Nutrition, Foods, and Exercise, Virginia Tech, Blacksburg, VA, USA.
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3
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Gearhardt AN, DiFeliceantonio AG. Highly processed foods can be considered addictive substances based on established scientific criteria. Addiction 2023; 118:589-598. [PMID: 36349900 DOI: 10.1111/add.16065] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/09/2022] [Accepted: 09/15/2022] [Indexed: 11/10/2022]
Abstract
BACKGROUND There is growing evidence that an addictive-eating phenotype may exist. There is significant debate regarding whether highly processed foods (HPFs; foods with refined carbohydrates and/or added fats) are addictive. The lack of scientifically grounded criteria to evaluate the addictive nature of HPFs has hindered the resolution of this debate. ANALYSIS The most recent scientific debate regarding a substance's addictive potential centered around tobacco. In 1988, the Surgeon General issued a report identifying tobacco products as addictive based on three primary scientific criteria: their ability to (1) cause highly controlled or compulsive use, (2) cause psychoactive (i.e. mood-altering) effects via their effect on the brain and (3) reinforce behavior. Scientific advances have now identified the ability of tobacco products to (4) trigger strong urges or craving as another important indicator of addictive potential. Here, we propose that these four criteria provide scientifically valid benchmarks that can be used to evaluate the addictiveness of HPFs. Then, we review the evidence regarding whether HPFs meet each criterion. Finally, we consider the implications of labeling HPFs as addictive. CONCLUSION Highly processed foods (HPFs) can meet the criteria to be labeled as addictive substances using the standards set for tobacco products. The addictive potential of HPFs may be a key factor contributing to the high public health costs associated with a food environment dominated by cheap, accessible and heavily marketed HPFs.
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Affiliation(s)
| | - Alexandra G DiFeliceantonio
- Fralin Biomedical Research Institute at VTC, Roanoke, VA, USA.,Department of Human Nutrition Foods, and Exercise, Virginia Polytechnic Institute and State University, Blacksburg, VA, USA
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4
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The impact of caloric availability on eating behavior and ultra-processed food reward. Appetite 2022; 178:106274. [PMID: 35963586 DOI: 10.1016/j.appet.2022.106274] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 07/07/2022] [Accepted: 08/07/2022] [Indexed: 12/19/2022]
Abstract
The food environment has changed rapidly and dramatically in the last 50 years. While industrial food processing has increased the safety and stability of the food supply, a rapid expansion in the scope and scale of food processing in the 1980's has resulted in a market dominated by ultra-processed foods. Here, we use the NOVA definition of category 4 ultra-processed foods (UPFs) as they make up around 58% of total calories consumed in the US and 66% of calories in US children. UPFs are formulated from ingredients with no or infrequent culinary use, contain additives, and have a long shelf-life, spending long periods in contact with packaging materials, allowing for the absorption of compounds from those materials. The full implications of this dietary shift to UPFs on human health and disease outcomes are difficult, if not impossible, to quantify. However, UPF consumption is linked with various forms of cancer, increased cardiovascular disease, and increased all-cause mortality. Understanding food choice is, therefore, a critical problem in health research. Although many factors influence food choice, here we focus on the properties of the foods themselves. UPFs are generally treated as food, not as the highly refined, industrialized substances that they are, whose properties and components must be studied. Here, we examine one property of UPFs, that they deliver useable calories rapidly as a potential factor driving UPF overconsumption. First, we explore evidence that UPFs deliver calories more rapidly. Next, we examine the role of the gut-brain axis and its interplay with canonical reward systems, and last, we describe how speed affects both basic learning processes and drugs of abuse.
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5
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Watts AG, Kanoski SE, Sanchez-Watts G, Langhans W. The physiological control of eating: signals, neurons, and networks. Physiol Rev 2022; 102:689-813. [PMID: 34486393 PMCID: PMC8759974 DOI: 10.1152/physrev.00028.2020] [Citation(s) in RCA: 54] [Impact Index Per Article: 27.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 08/30/2021] [Indexed: 02/07/2023] Open
Abstract
During the past 30 yr, investigating the physiology of eating behaviors has generated a truly vast literature. This is fueled in part by a dramatic increase in obesity and its comorbidities that has coincided with an ever increasing sophistication of genetically based manipulations. These techniques have produced results with a remarkable degree of cell specificity, particularly at the cell signaling level, and have played a lead role in advancing the field. However, putting these findings into a brain-wide context that connects physiological signals and neurons to behavior and somatic physiology requires a thorough consideration of neuronal connections: a field that has also seen an extraordinary technological revolution. Our goal is to present a comprehensive and balanced assessment of how physiological signals associated with energy homeostasis interact at many brain levels to control eating behaviors. A major theme is that these signals engage sets of interacting neural networks throughout the brain that are defined by specific neural connections. We begin by discussing some fundamental concepts, including ones that still engender vigorous debate, that provide the necessary frameworks for understanding how the brain controls meal initiation and termination. These include key word definitions, ATP availability as the pivotal regulated variable in energy homeostasis, neuropeptide signaling, homeostatic and hedonic eating, and meal structure. Within this context, we discuss network models of how key regions in the endbrain (or telencephalon), hypothalamus, hindbrain, medulla, vagus nerve, and spinal cord work together with the gastrointestinal tract to enable the complex motor events that permit animals to eat in diverse situations.
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Affiliation(s)
- Alan G Watts
- The Department of Biological Sciences, Dornsife College of Letters, Arts and Sciences, University of Southern California, Los Angeles, California
| | - Scott E Kanoski
- The Department of Biological Sciences, Dornsife College of Letters, Arts and Sciences, University of Southern California, Los Angeles, California
| | - Graciela Sanchez-Watts
- The Department of Biological Sciences, Dornsife College of Letters, Arts and Sciences, University of Southern California, Los Angeles, California
| | - Wolfgang Langhans
- Physiology and Behavior Laboratory, Eidgenössische Technische Hochschule-Zürich, Schwerzenbach, Switzerland
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6
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Reichenbach A, Clarke RE, Stark R, Lockie SH, Mequinion M, Dempsey H, Rawlinson S, Reed F, Sepehrizadeh T, DeVeer M, Munder AC, Nunez-Iglesias J, Spanswick D, Mynatt R, Kravitz AV, Dayas CV, Brown R, Andrews ZB. Metabolic sensing in AgRP neurons integrates homeostatic state with dopamine signalling in the striatum. eLife 2022; 11:72668. [PMID: 35018884 PMCID: PMC8803314 DOI: 10.7554/elife.72668] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Accepted: 01/11/2022] [Indexed: 11/17/2022] Open
Abstract
Agouti-related peptide (AgRP) neurons increase motivation for food, however, whether metabolic sensing of homeostatic state in AgRP neurons potentiates motivation by interacting with dopamine reward systems is unexplored. As a model of impaired metabolic-sensing, we used the AgRP-specific deletion of carnitine acetyltransferase (Crat) in mice. We hypothesised that metabolic sensing in AgRP neurons is required to increase motivation for food reward by modulating accumbal or striatal dopamine release. Studies confirmed that Crat deletion in AgRP neurons (KO) impaired ex vivo glucose-sensing, as well as in vivo responses to peripheral glucose injection or repeated palatable food presentation and consumption. Impaired metabolic-sensing in AgRP neurons reduced acute dopamine release (seconds) to palatable food consumption and during operant responding, as assessed by GRAB-DA photometry in the nucleus accumbens, but not the dorsal striatum. Impaired metabolic-sensing in AgRP neurons suppressed radiolabelled 18F-fDOPA accumulation after ~30 min in the dorsal striatum but not the nucleus accumbens. Impaired metabolic sensing in AgRP neurons suppressed motivated operant responding for sucrose rewards during fasting. Thus, metabolic-sensing in AgRP neurons is required for the appropriate temporal integration and transmission of homeostatic hunger-sensing to dopamine signalling in the striatum.
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Affiliation(s)
| | - Rachel E Clarke
- Department of Physiology, Monash University, Clayton, Australia
| | - Romana Stark
- Department of Physiology, Monash University, Clayton, Australia
| | - Sarah H Lockie
- Department of Physiology, Monash University, Clayton, Australia
| | | | - Harry Dempsey
- Department of Physiology, Monash University, Clayton, Australia
| | - Sasha Rawlinson
- Department of Physiology, Monash University, Clayton, Australia
| | - Felicia Reed
- Department of Physiology, Monash University, Clayton, Australia
| | - Tara Sepehrizadeh
- Monash Biomedical Imaging Facility, Monash University, Clayton, Australia
| | - Michael DeVeer
- Monash Biomedical Imaging Facility, Monash University, Clayton, Australia
| | - Astrid C Munder
- Department of Physiology, Monash University, Clayton, Australia
| | - Juan Nunez-Iglesias
- Department of Anatomy and Developmental Biology, Monash University, Clayton, Australia
| | - David Spanswick
- Department of Physiology, Monash University, Clayton, Australia
| | - Randall Mynatt
- Gene Nutrient Interactions Laboratory, Pennington Biomedical Research Center, Baton Rouge, United States
| | - Alexxai V Kravitz
- Departments of Psychiatry, Washington University in St. Louis, Saint Louis, United States
| | - Christopher V Dayas
- School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan, Australia
| | - Robyn Brown
- Department of Biochemistry and Pharmacology, University of Melbourne, Parkville, Australia
| | - Zane B Andrews
- Department of Physiology, Monash University, Clayton, Australia
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7
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de Wouters d’Oplinter A, Rastelli M, Van Hul M, Delzenne NM, Cani PD, Everard A. Gut microbes participate in food preference alterations during obesity. Gut Microbes 2022; 13:1959242. [PMID: 34424831 PMCID: PMC8386729 DOI: 10.1080/19490976.2021.1959242] [Citation(s) in RCA: 40] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023] Open
Abstract
Hypothalamic regulations of food intake are altered during obesity. The dopaminergic mesocorticolimbic system, responsible for the hedonic response to food intake, is also affected. Gut microbes are other key players involved in obesity. Therefore, we investigated whether the gut microbiota plays a causal role in hedonic food intake alterations contributing to obesity. We transferred fecal material from lean or diet-induced obese mice into recipient mice and evaluated the hedonic food intake using a food preference test comparing the intake of control and palatable diets (HFHS, High-Fat High-Sucrose) in donor and recipient mice. Obese mice ate 58% less HFHS during the food preference test (p < 0.0001) than the lean donors, suggesting a dysregulation of the hedonic food intake during obesity. Strikingly, the reduction of the pleasure induced by eating during obesity was transferable through gut microbiota transplantation since obese gut microbiota recipient mice exhibited similar reduction in HFHS intake during the food preference test (40% reduction as compared to lean gut microbiota recipient mice, p < 0.01). This effect was associated with a consistent trend in modifications of dopaminergic markers expression in the striatum. We also pinpointed a highly positive correlation between HFHS intake and Parabacteroides (p < 0.0001), which could represent a potential actor involved in hedonic feeding probably through the gut-to-brain axis. We further demonstrated the key roles played by gut microbes in this paradigm since depletion of gut microbiota using broad-spectrum antibiotics also altered HFHS intake during food preference test in lean mice. In conclusion, we discovered that gut microbes regulate hedonic aspects of food intake. Our data demonstrate that gut microbiota modifications associated with obesity participate in dysregulations of the reward and hedonic components of the food intake. These data provide evidence that gut microbes could be an interesting therapeutic target to tackle hedonic disorders related to obesity.
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Affiliation(s)
- Alice de Wouters d’Oplinter
- Metabolism and Nutrition Research Group, Louvain Drug Research Institute, Walloon Excellence in Life Sciences and BIOtechnology (WELBIO), UCLouvain, Université Catholique De Louvain, Brussels, Belgium
| | - Marialetizia Rastelli
- Metabolism and Nutrition Research Group, Louvain Drug Research Institute, Walloon Excellence in Life Sciences and BIOtechnology (WELBIO), UCLouvain, Université Catholique De Louvain, Brussels, Belgium
| | - Matthias Van Hul
- Metabolism and Nutrition Research Group, Louvain Drug Research Institute, Walloon Excellence in Life Sciences and BIOtechnology (WELBIO), UCLouvain, Université Catholique De Louvain, Brussels, Belgium
| | - Nathalie M. Delzenne
- Metabolism and Nutrition Research Group, Louvain Drug Research Institute, UCLouvain, Université Catholique De Louvain, Brussels, Belgium
| | - Patrice D. Cani
- Metabolism and Nutrition Research Group, Louvain Drug Research Institute, Walloon Excellence in Life Sciences and BIOtechnology (WELBIO), UCLouvain, Université Catholique De Louvain, Brussels, Belgium
| | - Amandine Everard
- Metabolism and Nutrition Research Group, Louvain Drug Research Institute, Walloon Excellence in Life Sciences and BIOtechnology (WELBIO), UCLouvain, Université Catholique De Louvain, Brussels, Belgium,CONTACT Amandine Everard UCLouvain, Université Catholique De Louvain, LDRI, Metabolism and Nutrition Research Group, Av. E. Mounier, 73 Box B1.73.11, B-1200Brussels, Belgium
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8
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Reconsolidation of a post-ingestive nutrient memory requires mTOR in the central amygdala. Mol Psychiatry 2021; 26:2820-2836. [PMID: 32873898 DOI: 10.1038/s41380-020-00874-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 08/04/2020] [Accepted: 08/21/2020] [Indexed: 01/22/2023]
Abstract
The central control of feeding behavior and metabolic homeostasis has been proposed to involve a form of post-ingestive nutrient learning independent of the gustatory value of food. However, after such learning, it is unknown which brain regions or circuits are activated to retrieve the stored memory and whether this memory undergoes reconsolidation that depends on protein synthesis after its reactivation through retrieval. In the present study, using a conditioned-flavor-preference paradigm by associating flavors with intra-gastric infusion of glucose to minimize the evaluation of the taste of food, we show that retrieval of the post-ingestive nutrient-conditioned flavor memory stimulates multiple brain regions in mice, including the central nucleus of the amygdala (CeA). Moreover, memory retrieval activated the mammalian target of rapamycin complex 1 (mTORC1) in the CeA, while site-specific or systemic inhibition of mTORC1 immediately after retrieval prevented the subsequent expression of the post-ingestive nutrient-associated flavor memory, leading to a long-lasting suppression of reinstatement. Taken together, our findings suggest that the reconsolidation process of a post-ingestive nutrient memory modulates food preferences.
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9
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Fat and Carbohydrate Interact to Potentiate Food Reward in Healthy Weight but Not in Overweight or Obesity. Nutrients 2021; 13:nu13041203. [PMID: 33917347 PMCID: PMC8067354 DOI: 10.3390/nu13041203] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2021] [Revised: 03/31/2021] [Accepted: 04/02/2021] [Indexed: 01/30/2023] Open
Abstract
Prior work suggests that actual, but not estimated, energy density drives the reinforcing value of food and that energy from fat and carbohydrate can interact to potentiate reward. Here we sought to replicate these findings in an American sample and to determine if the effects are influenced by body mass index (BMI). Thirty participants with healthy weight (HW; BMI 21.92 ± 1.77; M ± SD) and 30 participants with overweight/obesity (OW/OB; BMI 29.42 ± 4.44) rated pictures of common American snacks in 120-kcal portions for liking, familiarity, frequency of consumption, expected satiety, healthiness, energy content, energy density, and price. Participants then completed an auction task where they bid for the opportunity to consume each food. Snacks contained either primarily carbohydrate, primarily fat, or roughly equal portions of fat and carbohydrate (combo). Replicating prior work, we found that participants with HW bid the most for combo foods in linear mixed model analyses. This effect was not observed among individuals with OW/OB. Additionally, in contrast with previous reports, our linear regression analyses revealed a negative relationship between the actual energy density of the snacks and bid amount that was mediated by food price. Our findings support altered macronutrient reinforcement in obesity and highlight potential influences of the food environment on the regulation of food reward.
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10
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Schiano C, Grimaldi V, Scognamiglio M, Costa D, Soricelli A, Nicoletti GF, Napoli C. Soft drinks and sweeteners intake: Possible contribution to the development of metabolic syndrome and cardiovascular diseases. Beneficial or detrimental action of alternative sweeteners? Food Res Int 2021; 142:110220. [PMID: 33773688 DOI: 10.1016/j.foodres.2021.110220] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2020] [Revised: 02/02/2021] [Accepted: 02/05/2021] [Indexed: 01/04/2023]
Abstract
The rapid increase in obesity, metabolic syndrome, and cardiovascular diseases (CVDs) has been related to the rise in sugar-added foods and sweetened beverages consumption. An interesting approach has been to replace sugar with alternative sweeteners (AS), due to their impact on public health. Preclinical and clinical studies, which analyze the safety of AS intake, are still limited. Major pathogenic mechanisms of these substances include ROS and AGEs formation. Indeed, endothelial dysfunction involving in the pathogenesis of micro- and macro-vascular diseases is mitochondrial dysfunction dependent. Hyperglycemia and endoplasmic reticulum stress together produce ROS, contributing to the development and progression of cardiovascular complications during type 2 diabetes (T2D), thus causing oxidative changes and direct damage of lipids, proteins, and DNA. Epidemiological studies in healthy subjects have suggested that the consumption of artificial AS can promote CV complications, such as glucose intolerance and predisposition to the onset of T2D, whereas natural AS could reduce hyperglycemia, improve lipid metabolism and have antioxidant effects. Long-term prospective clinical randomized studies are needed to evaluate precisely whether exposure to alternative sugars can have clinical implications on natural history and clinical outcomes, especially in children or during the gestational period through breast milk.
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Affiliation(s)
- Concetta Schiano
- Department of Advanced Medical and Surgical Sciences (DAMSS), University of Campania "L. Vanvitelli", Naples, Italy.
| | | | - Michele Scognamiglio
- Clinical Department of Internal Medicine and Specialistic Units, Division of Clinical Immunology and Immunohematology, Transfusion Medicine, and Transplant Immunology [SIMT], Regional Reference Laboratory of Transplant Immunology [LIT], Azienda Universitaria Policlinico (AOU), Naples, Italy
| | - Dario Costa
- Clinical Department of Internal Medicine and Specialistic Units, Division of Clinical Immunology and Immunohematology, Transfusion Medicine, and Transplant Immunology [SIMT], Regional Reference Laboratory of Transplant Immunology [LIT], Azienda Universitaria Policlinico (AOU), Naples, Italy
| | - Andrea Soricelli
- IRCCS SDN, Naples, Italy; Department of Exercise and Wellness Sciences, University of Naples Parthenope, Naples, Italy
| | - Giovanni Francesco Nicoletti
- Multidisciplinary Department of Medical, Surgical and Dental Sciences, Plastic Surgery Unit, University of Campania "L. Vanvitelli", Naples, Italy
| | - Claudio Napoli
- Department of Advanced Medical and Surgical Sciences (DAMSS), University of Campania "L. Vanvitelli", Naples, Italy; IRCCS SDN, Naples, Italy; Clinical Department of Internal Medicine and Specialistic Units, Division of Clinical Immunology and Immunohematology, Transfusion Medicine, and Transplant Immunology [SIMT], Regional Reference Laboratory of Transplant Immunology [LIT], Azienda Universitaria Policlinico (AOU), Naples, Italy
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11
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Fromm S, Perszyk EE, Kanyamibwa A, Wall KM, Hutelin Z, Trinh J, Davis XS, Green BG, Flack KD, DiFeliceantonio A, Small DM. Development of MacroPics: A novel food picture set to dissociate the effects of carbohydrate and fat on eating behaviors. Appetite 2020; 159:105051. [PMID: 33242580 DOI: 10.1016/j.appet.2020.105051] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2020] [Accepted: 11/12/2020] [Indexed: 10/22/2022]
Abstract
Emerging evidence suggests that fat and carbohydrate interact to potentiate the reward value of food (DiFeliceantonio et al., 2018). The primary goal of the current study was to develop a novel picture set to facilitate research into the effects of macronutrient composition on food choice and eating behavior. Toward this aim, we developed "MacroPics." In Experiment 1, we photographed 120-kcal portions of 60 snack foods falling into one of the three macronutrient categories: (1) mostly carbohydrate, (2) mostly fat, or (3) a combination of fat and carbohydrate. Sixty-one participants rated the images for liking, familiarity, frequency of consumption, healthiness, estimated energy content (in kcal), and expected satiation. A subset of these images consisting of 36 items was then selected in an iterative process to minimize differences in ratings between the macronutrient categories while simultaneously ensuring similar within-category variability on a number of food characteristics (e.g., energy density, portion size, retail price) and visual properties (e.g., color, complexity, visual area). In Experiment 2, an independent sample of 67 participants rated the pictures of the final 36-item MacroPics. Both experiments reveal similar participant ratings across categories for item liking, familiarity, frequency, healthiness, and estimated energy content. Protein content was higher in the fat compared to the carbohydrate and combination categories, leading to higher ratings of estimated satiety and energy density for fatty foods. Item and macronutrient category characteristics of the final MacroPics set are reported.
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Affiliation(s)
- Sophie Fromm
- Modern Diet and Physiology Research Center, New Haven, CT, USA; Yale University School of Medicine, Department of Psychiatry, New Haven, CT, USA
| | - Emily E Perszyk
- Modern Diet and Physiology Research Center, New Haven, CT, USA; Yale University School of Medicine, Department of Psychiatry, New Haven, CT, USA
| | - Arsene Kanyamibwa
- Modern Diet and Physiology Research Center, New Haven, CT, USA; Yale University School of Medicine, Department of Psychiatry, New Haven, CT, USA
| | - Kathryn M Wall
- Modern Diet and Physiology Research Center, New Haven, CT, USA; Yale University School of Medicine, Department of Psychiatry, New Haven, CT, USA
| | - Zach Hutelin
- Modern Diet and Physiology Research Center, New Haven, CT, USA; Yale University School of Medicine, Department of Psychiatry, New Haven, CT, USA
| | - Jessica Trinh
- Modern Diet and Physiology Research Center, New Haven, CT, USA
| | - Xue S Davis
- Modern Diet and Physiology Research Center, New Haven, CT, USA; Yale University School of Medicine, Department of Psychiatry, New Haven, CT, USA
| | - Barry G Green
- Yale University School of Medicine, Department of Surgery, New Haven, CT, USA; The John B. Pierce Laboratory, New Haven, CT, USA
| | - Kyle D Flack
- University of Kentucky, College of Agriculture, Food, and Environment, Department of Dietetics and Human Nutrition, Lexington, KY, USA
| | - Alexandra DiFeliceantonio
- Virginia Tech, College of Agriculture and Life Sciences, Department of Human Nutrition, Foods and Exercise, VA, USA; Center for Transformative Research on Health Behaviors, Fralin Biomedical Research Institute at Virginia Tech, Roanoke, VA, USA
| | - Dana M Small
- Modern Diet and Physiology Research Center, New Haven, CT, USA; Yale University, Department of Psychology, New Haven, CT, USA; Yale University School of Medicine, Department of Psychiatry, New Haven, CT, USA.
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12
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An alternative pathway for sweet sensation: possible mechanisms and physiological relevance. Pflugers Arch 2020; 472:1667-1691. [PMID: 33030576 DOI: 10.1007/s00424-020-02467-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2020] [Revised: 09/14/2020] [Accepted: 09/23/2020] [Indexed: 12/12/2022]
Abstract
Sweet substances are detected by taste-bud cells upon binding to the sweet-taste receptor, a T1R2/T1R3 heterodimeric G protein-coupled receptor. In addition, experiments with mouse models lacking the sweet-taste receptor or its downstream signaling components led to the proposal of a parallel "alternative pathway" that may serve as metabolic sensor and energy regulator. Indeed, these mice showed residual nerve responses and behavioral attraction to sugars and oligosaccharides but not to artificial sweeteners. In analogy to pancreatic β cells, such alternative mechanism, to sense glucose in sweet-sensitive taste cells, might involve glucose transporters and KATP channels. Their activation may induce depolarization-dependent Ca2+ signals and release of GLP-1, which binds to its receptors on intragemmal nerve fibers. Via unknown neuronal and/or endocrine mechanisms, this pathway may contribute to both, behavioral attraction and/or induction of cephalic-phase insulin release upon oral sweet stimulation. Here, we critically review the evidence for a parallel sweet-sensitive pathway, involved signaling mechanisms, neural processing, interactions with endocrine hormonal mechanisms, and its sensitivity to different stimuli. Finally, we propose its physiological role in detecting the energy content of food and preparing for digestion.
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13
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Abstract
The conscious perception of the hedonic sensory properties of caloric foods is commonly believed to guide our dietary choices. Current and traditional models implicate the consciously perceived hedonic qualities of food as driving overeating, whereas subliminal signals arising from the gut would curb our uncontrolled desire for calories. Here we review recent animal and human studies that support a markedly different model for food reward. These findings reveal in particular the existence of subcortical body-to-brain neural pathways linking gastrointestinal nutrient sensors to the brain's reward regions. Unexpectedly, consciously perceptible hedonic qualities appear to play a less relevant, and mostly transient, role in food reinforcement. In this model, gut-brain reward pathways bypass cranial taste and aroma sensory receptors and the cortical networks that give rise to flavor perception. They instead reinforce behaviors independently of the cognitive processes that support overt insights into the nature of our dietary decisions.
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Affiliation(s)
- Ivan E. de Araujo
- Nash Family Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Modern Diet and Physiology Research Center, Yale University, New Haven, Connecticut 06511, USA
| | - Mark Schatzker
- Modern Diet and Physiology Research Center, Yale University, New Haven, Connecticut 06511, USA
| | - Dana M. Small
- Modern Diet and Physiology Research Center, Yale University, New Haven, Connecticut 06511, USA
- Departments of Psychiatry and Psychology, Yale University, New Haven, Connecticut 06511, USA
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14
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Affiliation(s)
- Dana M Small
- Modern Diet and Physiology Research Center, Department of Psychiatry, Yale University School of Medicine, Suite 6A, 1 Church Street, New Haven, CT 06510, USA.
| | - Alexandra G DiFeliceantonio
- Modern Diet and Physiology Research Center, Department of Psychiatry, Yale University School of Medicine, Suite 6A, 1 Church Street, New Haven, CT 06510, USA
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15
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Sylvetsky AC, Hiedacavage A, Shah N, Pokorney P, Baldauf S, Merrigan K, Smith V, Long MW, Black R, Robien K, Avena N, Gaine C, Greenberg D, Wootan MG, Talegawkar S, Colon‐Ramos U, Leahy M, Ohmes A, Mennella JA, Sacheck J, Dietz WH. From biology to behavior: a cross-disciplinary seminar series surrounding added sugar and low-calorie sweetener consumption. Obes Sci Pract 2019; 5:203-219. [PMID: 31275594 PMCID: PMC6587329 DOI: 10.1002/osp4.334] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2018] [Revised: 02/06/2019] [Accepted: 02/10/2019] [Indexed: 12/14/2022] Open
Abstract
INTRODUCTION This report presents a synopsis of a three-part, cross-sector, seminar series held at the George Washington University (GWU) in Washington, DC from February-April, 2018. The overarching goal of the seminar series was to provide a neutral forum for diverse stakeholders to discuss and critically evaluate approaches to address added sugar intake, with a key focus on the role of low-calorie sweeteners (LCS). METHODS During three seminars, twelve speakers from academic institutions, federal agencies, non-profit organizations, and the food and beverage industries participated in six interactive panel discussions to address: 1) Do Farm Bill Policies Impact Population Sugar Intake? 2) What is the Impact of Sugar-sweetened Beverage (SSB) Taxes on Health and Business? 3) Is Sugar Addictive? 4) Product Reformulation Efforts: Progress, Challenges, and Concerns? 5) Low-calorie Sweeteners: Helpful or Harmful, and 6) Are Novel Sweeteners a Plausible Solution? Discussion of each topic involved brief 15-minute presentations from the speakers, which were followed by a 25-minute panel discussion moderated by GWU faculty members and addressed questions generated by the audience. Sessions were designed to represent opposing views and stimulate meaningful debate. Given the provocative nature of the seminar series, attendee questions were gathered anonymously using Pigeonhole™, an interactive, online, question and answer platform. RESULTS This report summarizes each presentation and recapitulates key perspectives offered by the speakers and moderators. CONCLUSIONS The seminar series set the foundation for robust cross-sector dialogue necessary to inform meaningful future research, and ultimately, effective policies for lowering added sugar intakes.
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Affiliation(s)
- A. C. Sylvetsky
- Milken Institute School of Public HealthThe George Washington University
| | - A. Hiedacavage
- Milken Institute School of Public HealthThe George Washington University
| | - N. Shah
- Milken Institute School of Public HealthThe George Washington University
| | - P. Pokorney
- Milken Institute School of Public HealthThe George Washington University
| | - S. Baldauf
- Milken Institute School of Public HealthThe George Washington University
| | - K. Merrigan
- Milken Institute School of Public HealthThe George Washington University
- Swette Center for Sustainable Food SystemsArizona State University
| | - V. Smith
- Department of Agricultural EconomicsMontana State University
| | - M. W. Long
- Milken Institute School of Public HealthThe George Washington University
| | - R. Black
- Quadrant D Consulting, LLCTufts University Friedman School of Nutrition Science & Policy
| | - K. Robien
- Milken Institute School of Public HealthThe George Washington University
| | - N. Avena
- Department of NeuroscienceMount Sinai School of Medicine
- Department of PsychologyPrinceton University
| | | | - D. Greenberg
- PepsiCo Inc. (Current affiliation NutriSci Inc.)
| | | | - S. Talegawkar
- Milken Institute School of Public HealthThe George Washington University
| | - U. Colon‐Ramos
- Milken Institute School of Public HealthThe George Washington University
| | - M. Leahy
- Food, Nutrition & Policy Solutions LLC
| | | | | | - J. Sacheck
- Milken Institute School of Public HealthThe George Washington University
| | - W. H. Dietz
- Milken Institute School of Public HealthThe George Washington University
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16
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Dalenberg JR, Weitkamp L, Renken RJ, ter Horst GJ. Valence processing differs across stimulus modalities. Neuroimage 2018; 183:734-744. [DOI: 10.1016/j.neuroimage.2018.08.059] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2017] [Revised: 08/06/2018] [Accepted: 08/24/2018] [Indexed: 12/15/2022] Open
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17
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Zhang L, Han W, Lin C, Li F, de Araujo IE. Sugar Metabolism Regulates Flavor Preferences and Portal Glucose Sensing. Front Integr Neurosci 2018; 12:57. [PMID: 30519164 PMCID: PMC6258782 DOI: 10.3389/fnint.2018.00057] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Accepted: 11/06/2018] [Indexed: 11/23/2022] Open
Abstract
In most species, including humans, food preference is primarily controlled by nutrient value. In particular, glucose-containing sugars exert exquisitely strong effects on food choice via gut-generated signals. However, the identity of the visceral signals underlying glucose’s rewarding effects remains uncertain. In particular, it is unknown whether sugar metabolism mediates the formation of preferences for glucose-containing sugars. Using the mouse as a model organism, we made use of a combination of conditioning schedules, gastrointestinal nutrient administration, and chromatographic/electrochemical methods to assess the behavioral and neural effects of activating the gut with either metabolizable glucose or a non-metabolizable glucose analog. We show that mice display much superior preferences for flavors associated with intra-gastric infusions of glucose compared to flavors associated with intra-gastric infusions of the non-metabolizable glucose analog α-methyl-D-glucopyranoside (“MDG,” an activator of intestinal sodium/glucose co-transporters). These effects were unaffected by surgical bypassing of the duodenum, suggesting glucose-specific post-absorptive sensing mechanisms. Consistently, intra-portal infusions of glucose, but not of MDG, induced significant rises in dopamine (DA) levels within brain reward circuits. Our data reveal that the unmatched rewarding effects of glucose-containing sugars cannot be accounted for by metabolism-independent activation of sodium/glucose cotransporters; rather, they point to glucose metabolism as the physiological mechanism underlying the potent reward value of sugar-sweetened flavored beverages. In particular, no circulating “gut factors” need to be invoked to explain the reward value of ingested glucose. Thus, instead of circulating gut hormones, portal-mesenteric sensing of glucose emerges as the preferential physiological pathway for sugar reward.
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Affiliation(s)
- Lingli Zhang
- Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,The John B. Pierce Laboratory, Yale University, New Haven, CT, United States
| | - Wenfei Han
- The John B. Pierce Laboratory, Yale University, New Haven, CT, United States.,Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States.,Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, United States.,Shanghai Engineering Research Center of Tooth Restoration and Regeneration, School & Hospital of Stomatology, Tongji University, Shanghai, China
| | - Chenguanlu Lin
- The John B. Pierce Laboratory, Yale University, New Haven, CT, United States.,Shanghai Engineering Research Center of Tooth Restoration and Regeneration, School & Hospital of Stomatology, Tongji University, Shanghai, China
| | - Fei Li
- Ministry of Education-Shanghai Key Laboratory of Children's Environmental Health, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China.,Developmental and Behavioral Pediatric Department & Child Primary Care Department, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Ivan E de Araujo
- The John B. Pierce Laboratory, Yale University, New Haven, CT, United States.,Department of Psychiatry, Yale University School of Medicine, New Haven, CT, United States.,Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY, United States.,Diabetes, Obesity and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY, United States.,Department of Cellular and Molecular Physiology, Yale University School of Medicine, New Haven, CT, United States
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18
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Supra-Additive Effects of Combining Fat and Carbohydrate on Food Reward. Cell Metab 2018; 28:33-44.e3. [PMID: 29909968 DOI: 10.1016/j.cmet.2018.05.018] [Citation(s) in RCA: 148] [Impact Index Per Article: 24.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Revised: 03/29/2018] [Accepted: 05/18/2018] [Indexed: 01/19/2023]
Abstract
Post-ingestive signals conveying information about the nutritive properties of food are critical for regulating ingestive behavior. Here, using an auction task concomitant to fMRI scanning, we demonstrate that participants are willing to pay more for fat + carbohydrate compared with equally familiar, liked, and caloric fat or carbohydrate foods and that this potentiated reward is associated with response in areas critical for reward valuation, including the dorsal striatum and mediodorsal thalamus. We also show that individuals are better able to estimate the energy density of fat compared with carbohydrate and fat + carbohydrate foods, an effect associated with functional connectivity between visual (fusiform gyrus) and valuation (ventromedial prefrontal cortex) areas. These results provide the first demonstration that foods high in fat and carbohydrate are, calorie for calorie, valued more than foods containing only fat or carbohydrate and that this effect is associated with greater recruitment of central reward circuits.
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19
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Vera-Rivera G, Miranda MI, Rangel-Hernández JA, Badillo-Juárez D, Fregoso-Urrutia D, Caynas-Rojas S. Effects of caloric or non-caloric sweetener long-term consumption on taste preferences and new aversive learning. Nutr Neurosci 2018; 23:128-138. [DOI: 10.1080/1028415x.2018.1478654] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
Affiliation(s)
- Gabriela Vera-Rivera
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Juriquilla, México
| | - María-Isabel Miranda
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Juriquilla, México
| | - José Alejandro Rangel-Hernández
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Juriquilla, México
| | - Dennys Badillo-Juárez
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Juriquilla, México
| | - Daniela Fregoso-Urrutia
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Juriquilla, México
| | - Seraid Caynas-Rojas
- Departamento de Neurobiología Conductual y Cognitiva, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Juriquilla, México
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20
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Patrono E, Matsumoto J, Nishimaru H, Takamura Y, Chinzorig IC, Ono T, Nishijo H. Rewarding Effects of Operant Dry-Licking Behavior on Neuronal Firing in the Nucleus Accumbens Core. Front Pharmacol 2017; 8:536. [PMID: 28860992 PMCID: PMC5559468 DOI: 10.3389/fphar.2017.00536] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2017] [Accepted: 08/02/2017] [Indexed: 01/26/2023] Open
Abstract
Certain eating behaviors are characterized by a trend of elevated food consumption. However, neural mechanisms mediating the motivation for food consumption are not fully understood. Food impacts the brain-rewarding-system via both oral-sensory and post-ingestive information. Recent studies have reported an important role of visceral gut information in mediating dopamine (DA) release in the brain rewarding system. This is independent of oral sensation, suggesting a role of the gut-brain-DA-axis in feeding behavior. In this study, we investigated the effects of intra-gastric (IG) self-administration of glucose on neuronal firings in the nucleus accumbens (NA) of water-deprived rats. Rats were trained in an operant-licking paradigm. During training, when the light was on for 2 min (light-period), rats were required to lick a spout to acquire the water oral-intake learning, and either an IG self-infusion of 0.4 M glucose (GLU group) or water (H2O group). Rats rested in the dark-period (3 min) following the light-period. Four cycles of the operant-licking paradigm consisting of the light–dark periods were performed per day, for 4 consecutive days. In the test session, the same rats licked the same spout to acquire the IG self-administration of the corresponding solutions, without oral water ingestion (dry licking). Behavioral results indicated IG self-administration of glucose elicits more dry-licking behavior than that of water. Neurophysiological results indicated in the dark period, coefficient of variance (CV) measuring the inter-spike interval variability of putative medial spiny neurons (pMSNs) in the NA was reduced in the H2O group compared to the GLU group, while there was no significant difference in physical behaviors in the dark period between the two groups. Since previous studies reported that DA release increases CV of MSNs, the present results suggest that greater CV of pMSNs in the GLU group reflects greater DA release in the NA and elevated motivation in the GLU group, which might increase lickings in the test session in the GLU group compared to the H2O group.
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Affiliation(s)
- Enrico Patrono
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of ToyamaToyama, Japan
| | - Jumpei Matsumoto
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of ToyamaToyama, Japan
| | - Hiroshi Nishimaru
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of ToyamaToyama, Japan
| | - Yusaku Takamura
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of ToyamaToyama, Japan
| | - Ikhruud C Chinzorig
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of ToyamaToyama, Japan
| | - Taketoshi Ono
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of ToyamaToyama, Japan
| | - Hisao Nishijo
- System Emotional Science, Graduate School of Medicine and Pharmaceutical Sciences, University of ToyamaToyama, Japan
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21
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Integration of Sweet Taste and Metabolism Determines Carbohydrate Reward. Curr Biol 2017; 27:2476-2485.e6. [PMID: 28803868 DOI: 10.1016/j.cub.2017.07.018] [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: 03/16/2017] [Revised: 06/05/2017] [Accepted: 07/07/2017] [Indexed: 02/07/2023]
Abstract
Post-ingestive signals related to nutrient metabolism are thought to be the primary drivers of reinforcement potency of energy sources. Here, in a series of neuroimaging and indirect calorimetry human studies, we examine the relative roles of caloric load and perceived sweetness in driving metabolic, perceptual, and brain responses to sugared beverages. Whereas caloric load was manipulated using the tasteless carbohydrate maltodextrin, sweetness levels were manipulated using the non-nutritive sweetener sucralose. By formulating beverages that contain different amounts of maltodextrin+sucralose, we demonstrate a non-linear association between caloric load, metabolic response, and reinforcement potency, which is driven in part by the extent to which sweetness is proportional to caloric load. In particular, we show that (1) lower-calorie beverages can produce greater metabolic response and condition greater brain response and liking than higher-calorie beverages and (2) when sweetness is proportional to caloric load, greater metabolic responses are observed. These results demonstrate a non-linear association between caloric load and reward and describe an unanticipated role for sweet taste in regulating carbohydrate metabolism, revealing a novel mechanism by which sugar-sweetened beverages influence physiological responses to carbohydrate ingestion.
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22
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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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23
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Circuit organization of sugar reinforcement. Physiol Behav 2016; 164:473-477. [PMID: 27126968 DOI: 10.1016/j.physbeh.2016.04.041] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2016] [Revised: 04/23/2016] [Accepted: 04/23/2016] [Indexed: 12/29/2022]
Abstract
Sugar's potent reinforcing properties arise from the complex interplay between gustatory and nutritive signals. This commentary addresses a unique organizational aspect of the neuronal circuitry that mediates sugar reinforcement in both Drosophila and rodents. Specifically, current evidence supports a general circuit model where separate populations of dopaminergic neurons encode the gustatory and nutritive values of sugar. This arrangement allows animals to prioritize energy seeking over taste quality, and implies that specialized subpopulations of dopamine-containing neurons form a class of evolutionary conserved chemo- and nutrient-sensors.
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24
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Bond ND, Guo J, Hall KD, McPherron AC. Modeling Energy Dynamics in Mice with Skeletal Muscle Hypertrophy Fed High Calorie Diets. Int J Biol Sci 2016; 12:617-30. [PMID: 27076790 PMCID: PMC4829546 DOI: 10.7150/ijbs.13525] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Accepted: 02/17/2016] [Indexed: 11/26/2022] Open
Abstract
Retrospective and prospective studies show that lean mass or strength is positively associated with metabolic health. Mice deficient in myostatin, a growth factor that negatively regulates skeletal muscle mass, have increased muscle and body weights and are resistant to diet-induced obesity. Their leanness is often attributed to higher energy expenditure in the face of normal food intake. However, even obese animals have an increase in energy expenditure compared to normal weight animals suggesting this is an incomplete explanation. We have previously developed a computational model to estimate energy output, fat oxidation and respiratory quotient from food intake and body composition measurements to more accurately account for changes in body composition in rodents over time. Here we use this approach to understand the dynamic changes in energy output, intake, fat oxidation and respiratory quotient in muscular mice carrying a dominant negative activin receptor IIB expressed specifically in muscle. We found that muscular mice had higher food intake and higher energy output when fed either chow or a high-fat diet for 15 weeks compared to WT mice. Transgenic mice also matched their rate of fat oxidation to the rate of fat consumed better than WT mice. Surprisingly, when given a choice between high-fat diet and Ensure® drink, transgenic mice consumed relatively more calories from Ensure® than from the high-fat diet despite similar caloric intake to WT mice. When switching back and forth between diets, transgenic mice adjusted their intake more rapidly than WT to restore normal caloric intake. Our results show that mice with myostatin inhibition in muscle are better at adjusting energy intake and output on diets of different macronutrient composition than WT mice to maintain energy balance and resist weight gain.
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Affiliation(s)
- Nichole D Bond
- 1. Genetics of Development and Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892 USA
| | - Juen Guo
- 2. Laboratory of Biological Modeling, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892 USA
| | - Kevin D Hall
- 2. Laboratory of Biological Modeling, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892 USA
| | - Alexandra C McPherron
- 1. Genetics of Development and Disease Branch, National Institute of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892 USA
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25
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Woods CA, Guttman ZR, Huang D, Kolaric RA, Rabinowitsch AI, Jones KT, Cabeza de Vaca S, Sclafani A, Carr KD. Insulin receptor activation in the nucleus accumbens reflects nutritive value of a recently ingested meal. Physiol Behav 2016; 159:52-63. [PMID: 26988281 DOI: 10.1016/j.physbeh.2016.03.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2016] [Revised: 03/01/2016] [Accepted: 03/12/2016] [Indexed: 12/19/2022]
Abstract
With respect to feeding, insulin is typically thought of as a satiety hormone, acting in the hypothalamus to limit ingestive behavior. However, accumulating evidence suggests that insulin also has the ability to alter dopamine release in the striatum and influence food preferences. With increased access to high calorie foods, Western societies have a high prevalence of obesity, accompanied by insulin insensitivity. Little is known about how insulin is trafficked into the brain following food consumption and whether insulin insensitivity in the periphery is mirrored in the central nervous system. We investigated insulin receptor activation in the ventral striatum of rats receiving water or 16% glucose either orally or intragastrically. We also investigated whether glucose-induced insulin receptor activation was altered in food-restricted (FR) or diet-induced obesity (OB) rat models. Lastly, we examined whether insulin plays a significant role in flavor-nutrient preference learning. Glucose intake stimulated a rapid increase in insulin receptor activity in the ventral striatum of FR and ad libitum (AL) fed rats, but not OB rats. Similarly, both AL and FR, but not OB rats demonstrated significant flavor-nutrient preferences. However AL rats receiving brief inhibition of insulin activity during conditioning failed to acquire a significant flavor-nutrient preference. These findings suggest that impaired insulin receptor activation in the ventral striatum may result in inaccurate valuation of nutritive foods, which could lead to overconsumption of food or the selection of foods that don't accurately meet the body's current physiological needs.
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Affiliation(s)
- C A Woods
- Center for Neural Science, NYU Graduate School of Arts & Sciences, United States
| | - Z R Guttman
- Center for Neural Science, NYU Graduate School of Arts & Sciences, United States
| | - D Huang
- Dept of Psychiatry, NYU School of Medicine, United States
| | - R A Kolaric
- Dept of Psychiatry, NYU School of Medicine, United States
| | | | - K T Jones
- Dept of Psychiatry, NYU School of Medicine, United States
| | | | - A Sclafani
- Dept of Psychology, Brooklyn College, CUNY, United States
| | - K D Carr
- Center for Neural Science, NYU Graduate School of Arts & Sciences, United States; Dept of Psychiatry, NYU School of Medicine, United States; Dept of Biochemistry and Molecular Pharmacology, NYU School of Medicine, United States
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26
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Burke MV, Small DM. Effects of the modern food environment on striatal function, cognition and regulation of ingestive behavior. Curr Opin Behav Sci 2016; 9:97-105. [PMID: 29619405 DOI: 10.1016/j.cobeha.2016.02.036] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Emerging evidence from human and animal studies suggest that consumption of palatable foods rich in fat and/or carbohydrates may produce deleterious influences on brain function independently of body weight or metabolic disease. Here we consider two mechanisms by which diet can impact striatal circuits to amplify food cue reactivity and impair inhibitory control. First, we review findings demonstrating that the energetic properties of foods regulate nucleus accumbens food cue reactivity, a demonstrated predictor of weight gain susceptibility, which is then sensitized by chronic consumption of an energy dense diet. Second, we consider evidence for diet-induced adaptations in dorsal striatal dopamine signaling that is associated with impaired inhibitory control and negative outcome learning.
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Affiliation(s)
- Mary V Burke
- Interdepartmental Neuroscience Program, Yale University, New Haven, CT, U.S.,John B. Pierce Laboratory, 290 Congress Avenue, New Haven, CT, U.S.,Modern Diet and Physiology Research Center, 290 Congress Avenue, New Haven, CT, U.S
| | - Dana M Small
- Interdepartmental Neuroscience Program, Yale University, New Haven, CT, U.S.,John B. Pierce Laboratory, 290 Congress Avenue, New Haven, CT, U.S.,Department of Psychiatry, Yale School of Medicine, New Haven, CT, U.S.,Department of Psychology, Yale University, New Haven, CT, U.S.,Modern Diet and Physiology Research Center, 290 Congress Avenue, New Haven, CT, U.S
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27
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Han W, Tellez LA, Niu J, Medina S, Ferreira TL, Zhang X, Su J, Tong J, Schwartz GJ, van den Pol A, de Araujo IE. Striatal Dopamine Links Gastrointestinal Rerouting to Altered Sweet Appetite. Cell Metab 2016; 23:103-12. [PMID: 26698915 PMCID: PMC4715689 DOI: 10.1016/j.cmet.2015.10.009] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Revised: 07/04/2015] [Accepted: 10/19/2015] [Indexed: 12/01/2022]
Abstract
Reductions in calorie intake contribute significantly to the positive outcome of bariatric surgeries. However, the physiological mechanisms linking the rerouting of the gastrointestinal tract to reductions in sugar cravings remain uncertain. We show that a duodenal-jejunal bypass (DJB) intervention inhibits maladaptive sweet appetite by acting on dopamine-responsive striatal circuitries. DJB disrupted the ability of recurrent sugar exposure to promote sweet appetite in sated animals, thereby revealing a link between recurrent duodenal sugar influx and maladaptive sweet intake. Unlike ingestion of a low-calorie sweetener, ingestion of sugar was associated with significant dopamine effluxes in the dorsal striatum, with glucose infusions into the duodenum inducing greater striatal dopamine release than equivalent jejunal infusions. Consistently, optogenetic activation of dopamine-excitable cells of the dorsal striatum was sufficient to restore maladaptive sweet appetite in sated DJB mice. Our findings point to a causal link between striatal dopamine signaling and the outcomes of bariatric interventions.
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Affiliation(s)
- Wenfei Han
- Laboratory of Oral Biomedical Science and Translational Medicine, School of Stomatology, Tongji University, Shanghai 200072, China; The John B. Pierce Laboratory, New Haven, CT 06519, USA; Department of Psychiatry, Yale University School of Medicine, New Haven, CT 06519, USA
| | - Luis A Tellez
- The John B. Pierce Laboratory, New Haven, CT 06519, USA; Department of Psychiatry, Yale University School of Medicine, New Haven, CT 06519, USA
| | - Jingjing Niu
- The John B. Pierce Laboratory, New Haven, CT 06519, USA; Department of Psychiatry, Yale University School of Medicine, New Haven, CT 06519, USA; Division of Endocrinology, Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA
| | - Sara Medina
- The John B. Pierce Laboratory, New Haven, CT 06519, USA
| | - Tatiana L Ferreira
- The John B. Pierce Laboratory, New Haven, CT 06519, USA; Department of Psychiatry, Yale University School of Medicine, New Haven, CT 06519, USA; Mathematics, Computing and Cognition Center, Federal University of ABC, Santo André 09210, Brazil
| | - Xiaobing Zhang
- Department of Neurosurgery, Yale University School of Medicine, New Haven, CT 06519, USA
| | - Jiansheng Su
- Laboratory of Oral Biomedical Science and Translational Medicine, School of Stomatology, Tongji University, Shanghai 200072, China
| | - Jenny Tong
- Division of Endocrinology, Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA
| | - Gary J Schwartz
- Albert Einstein College of Medicine, Yeshiva University, Bronx, NY 10461, USA
| | - Anthony van den Pol
- Department of Neurosurgery, Yale University School of Medicine, New Haven, CT 06519, USA
| | - Ivan E de Araujo
- The John B. Pierce Laboratory, New Haven, CT 06519, USA; Department of Psychiatry, Yale University School of Medicine, New Haven, CT 06519, USA; Department of Physiology, Yale University School of Arts and Sciences, New Haven, CT 06511, USA.
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28
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Steinbusch L, Labouèbe G, Thorens B. Brain glucose sensing in homeostatic and hedonic regulation. Trends Endocrinol Metab 2015; 26:455-66. [PMID: 26163755 DOI: 10.1016/j.tem.2015.06.005] [Citation(s) in RCA: 57] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2015] [Revised: 06/15/2015] [Accepted: 06/16/2015] [Indexed: 11/21/2022]
Abstract
Glucose homeostasis as well as homeostatic and hedonic control of feeding is regulated by hormonal, neuronal, and nutrient-related cues. Glucose, besides its role as a source of metabolic energy, is an important signal controlling hormone secretion and neuronal activity, hence contributing to whole-body metabolic integration in coordination with feeding control. Brain glucose sensing plays a key, but insufficiently explored, role in these metabolic and behavioral controls, which when deregulated may contribute to the development of obesity and diabetes. The recent introduction of innovative transgenic, pharmacogenetic, and optogenetic techniques allows unprecedented analysis of the complexity of central glucose sensing at the molecular, cellular, and neuronal circuit levels, which will lead to a new understanding of the pathogenesis of metabolic diseases.
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Affiliation(s)
- Laura Steinbusch
- Center for Integrative Genomics, University of Lausanne, Lausanne, Switzerland
| | - Gwenaël Labouèbe
- Center for Integrative Genomics, University of Lausanne, Lausanne, Switzerland
| | - Bernard Thorens
- Center for Integrative Genomics, University of Lausanne, Lausanne, Switzerland.
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29
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Basolateral amygdala response to food cues in the absence of hunger is associated with weight gain susceptibility. J Neurosci 2015; 35:7964-76. [PMID: 25995480 DOI: 10.1523/jneurosci.3884-14.2015] [Citation(s) in RCA: 104] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
In rodents, food-predictive cues elicit eating in the absence of hunger (Weingarten, 1983). This behavior is disrupted by the disconnection of amygdala pathways to the lateral hypothalamus (Petrovich et al., 2002). Whether this circuit contributes to long-term weight gain is unknown. Using fMRI in 32 healthy individuals, we demonstrate here that the amygdala response to the taste of a milkshake when sated but not hungry positively predicts weight change. This effect is independent of sex, initial BMI, and total circulating ghrelin levels, but it is only present in individuals who do not carry a copy of the A1 allele of the Taq1A polymorphism. In contrast, A1 allele carriers, who have decreased D2 receptor density (Blum et al., 1996), show a positive association between caudate response and weight change. Regardless of genotype, however, dynamic causal modeling supports unidirectional gustatory input from basolateral amygdala (BLA) to hypothalamus in sated subjects. This finding suggests that, as in rodents, external cues gain access to the homeostatic control circuits of the human hypothalamus via the amygdala. In contrast, during hunger, gustatory inputs enter the hypothalamus and drive bidirectional connectivity with the amygdala. These findings implicate the BLA-hypothalamic circuit in long-term weight change related to nonhomeostatic eating and provide compelling evidence that distinct brain mechanisms confer susceptibility to weight gain depending upon individual differences in dopamine signaling.
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30
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Davies JR, Humby T, Dwyer DM, Garfield AS, Furby H, Wilkinson LS, Wells T, Isles AR. Calorie seeking, but not hedonic response, contributes to hyperphagia in a mouse model for Prader-Willi syndrome. Eur J Neurosci 2015; 42:2105-13. [PMID: 26040449 PMCID: PMC4949663 DOI: 10.1111/ejn.12972] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2015] [Revised: 05/29/2015] [Accepted: 05/29/2015] [Indexed: 12/25/2022]
Abstract
Prader–Willi syndrome (PWS) is a neurodevelopmental disorder caused by deletion or inactivation of paternally expressed imprinted genes on human chromosome 15q11‐q13, the most recognised feature of which is hyperphagia. This is thought to arise as a consequence of abnormalities in both the physiological drive for food and the rewarding properties of food. Although a number of mouse models for PWS exist, the underlying variables dictating maladaptive feeding remain unknown. Here, feeding behaviour in a mouse model in which the imprinting centre (IC) of the syntenic PWS interval has been deleted (PWSICdel mice) is characterised. It is demonstrated that PWSICdel mice show hyperghrelinaemia and increased consumption of food both following overnight fasting and when made more palatable with sucrose. However, hyperphagia in PWSICdel mice was not accompanied by any changes in reactivity to the hedonic properties of palatable food (sucrose or saccharin), as measured by lick‐cluster size. Nevertheless, overall consumption by PWSICdel mice for non‐caloric saccharin in the licking test was significantly reduced. Combined with converging findings from a continuous reinforcement schedule, these data indicate that PWSICdel mice show a marked heightened sensitivity to the calorific value of food. Overall, these data indicate that any impact of the rewarding properties of food on the hyperphagia seen in PWSICdel mice is driven primarily by calorie content and is unlikely to involve hedonic processes. This has important implications for understanding the neural systems underlying the feeding phenotype of PWS and the contribution of imprinted genes to abnormal feeding behaviour more generally.
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Affiliation(s)
- Jennifer R Davies
- Behavioural Genetics Group, MRC Centre for Neuropsychiatric Genetics and Genomics, Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Cardiff, CF24 4HQ, UK.,School of Medicine, Cardiff University, Cardiff, UK
| | - Trevor Humby
- Behavioural Genetics Group, MRC Centre for Neuropsychiatric Genetics and Genomics, Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Cardiff, CF24 4HQ, UK.,School of Psychology, Cardiff University, Cardiff, UK
| | - Dominic M Dwyer
- School of Psychology, Cardiff University, Cardiff, UK.,School of Psychology, University of New South Wales, Sydney, NSW, Australia
| | | | - Hannah Furby
- Behavioural Genetics Group, MRC Centre for Neuropsychiatric Genetics and Genomics, Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Cardiff, CF24 4HQ, UK.,School of Medicine, Cardiff University, Cardiff, UK.,School of Biosciences, Cardiff University, Cardiff, UK
| | - Lawrence S Wilkinson
- Behavioural Genetics Group, MRC Centre for Neuropsychiatric Genetics and Genomics, Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Cardiff, CF24 4HQ, UK.,School of Medicine, Cardiff University, Cardiff, UK.,School of Psychology, Cardiff University, Cardiff, UK
| | - Timothy Wells
- School of Biosciences, Cardiff University, Cardiff, UK
| | - Anthony R Isles
- Behavioural Genetics Group, MRC Centre for Neuropsychiatric Genetics and Genomics, Neuroscience and Mental Health Research Institute, Cardiff University, Hadyn Ellis Building, Cardiff, CF24 4HQ, UK.,School of Medicine, Cardiff University, Cardiff, UK
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31
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Abstract
Levels of obesity have reached epidemic proportions on a global scale, which has led to considerable increases in health problems and increased risk of several diseases, including cardiovascular and pulmonary diseases, cancer and diabetes mellitus. People with obesity consume more food than is needed to maintain an ideal body weight, despite the discrimination that accompanies being overweight and the wealth of available information that overconsumption is detrimental to health. The relationship between energy expenditure and energy intake throughout an individual's lifetime is far more complicated than previously thought. An improved comprehension of the relationships between taste, palatability, taste receptors and hedonic responses to food might lead to increased understanding of the biological underpinnings of energy acquisition, as well as why humans sometimes eat more than is needed and more than we know is healthy. This Review discusses the role of taste receptors in the tongue, gut, pancreas and brain and their hormonal involvement in taste perception, as well as the relationship between taste perception, overeating and the development of obesity.
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Affiliation(s)
- Sara Santa-Cruz Calvo
- Laboratory of Clinical Investigation, National Institute on Aging, NIH, Biomedical Research Center, Room 09B133, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224-6825, USA
| | - Josephine M Egan
- Laboratory of Clinical Investigation, National Institute on Aging, NIH, Biomedical Research Center, Room 09B133, 251 Bayview Boulevard, Suite 100, Baltimore, MD 21224-6825, USA
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32
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Cosgrove KP, Veldhuizen MG, Sandiego CM, Morris ED, Small DM. Opposing relationships of BMI with BOLD and dopamine D2/3 receptor binding potential in the dorsal striatum. Synapse 2015; 69:195-202. [PMID: 25664726 DOI: 10.1002/syn.21809] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 12/15/2014] [Accepted: 01/22/2015] [Indexed: 12/16/2022]
Abstract
Findings from clinical and preclinical studies converge to suggest that increased adiposity and/or exposure to a high fat diet are associated with alterations in dorsal striatal (DS) circuitry. In humans there is a reliable inverse relationship between body mass index (BMI) and response to palatable food consumption in the dorsal striatum (DS). Positron emission tomography (PET) studies also suggest altered DS dopamine type 2/3 receptor (D2R/D3R) availability in obesity; however, the direction of the association is unclear. It is also not clear whether dopamine receptor levels contribute to the lower blood oxygen level dependent (BOLD) response because PET studies have targeted the morbidly obese and, functional magnetic resonance imaging (fMRI) studies rarely include individuals with BMIs in this range. Therefore we examined whether the fMRI BOLD response in the DS to milkshake is associated with D2R/D3R availability measured with [(11) C]PHNO and PET in individuals with BMI ranging from healthy weight to moderately obese. Twenty-nine subjects participated in the fMRI study, 12 in the [(11) C]PHNO PET study, 8 of whom also completed the fMRI study. As predicted there was a significant negative association between DS BOLD response to milkshake and BMI. In contrast, BMI was positively associated with D2R/D3R availability. Dorsal striatal BOLD response was unrelated to D2R/D3R availability. Considered in the context of the larger literature our results suggest the existence of a non-linear relationship between D2R/D3R availability and BMI. Additionally, the altered BOLD responses to palatable food consumption observed in obesity are not clearly related to D2R/D3R receptor availability. Using [(11) C]PHNO and PET brain imaging techniques we show that body mass index was positively associated with D2R/D3R availability in the dorsal striatum, but that functional MR BOLD response was unrelated to D2R/D3R availability. These results suggest the existence of a nonlinear relationship between D2R/D3R availability and body mass index and that the altered BOLD responses to food consumption seen in obesity are not directly related to D2R/D3R availability.
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Affiliation(s)
- Kelly P Cosgrove
- Department of Psychiatry, Yale University School of Medicine, New Haven, Connecticut; Department of Diagnostic Radiology, Yale PET Center, Yale University School of Medicine, New Haven, Connecticut
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33
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Sclafani A, Zukerman S, Ackroff K. Postoral glucose sensing, not caloric content, determines sugar reward in C57BL/6J mice. Chem Senses 2015; 40:245-58. [PMID: 25715333 DOI: 10.1093/chemse/bjv002] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Recent studies suggest that because of their energy value, sugars are more rewarding than non-caloric sweeteners. However, intragastric infusion data indicate that sugars differ in their postoral appetite-stimulating effects. We therefore compared the preference for isocaloric 8% sucrose, glucose, and fructose solutions with that of a non-caloric sweetener solution (0.8% sucralose) in C57BL/6J mice. Brief 2-bottle tests indicated that sucralose was isopreferred to sucrose but more preferred than glucose or fructose. Yet, in long-term tests, the mice preferred sucrose and glucose, but not fructose to sucralose. Additional experiments were conducted with a non-caloric 0.1% sucralose + 0.1% saccharin mixture (S + S), which does not have the postoral inhibitory effects of 0.8% sucralose. The S + S was preferred to fructose in brief and long-term choice tests. S + S was also preferred to glucose and sucrose in brief tests, but the sugars were preferred in long-term tests. In progressive ratio tests, non-deprived and food-deprived mice licked more for glucose but not fructose than for S + S. These findings demonstrate that the nutrient-specific postoral actions, not calories per se, determine the avidity for sugar versus non-caloric sweeteners. Furthermore, sweet taste intensity and potential postoral inhibitory actions must be considered in comparing non-caloric and caloric sweeteners.
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Affiliation(s)
- Anthony Sclafani
- Department of Psychology, Brooklyn College of CUNY, 2900 Bedford Avenue, Brooklyn, NY 11210, USA
| | - Steven Zukerman
- Department of Psychology, Brooklyn College of CUNY, 2900 Bedford Avenue, Brooklyn, NY 11210, USA
| | - Karen Ackroff
- Department of Psychology, Brooklyn College of CUNY, 2900 Bedford Avenue, Brooklyn, NY 11210, USA
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34
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Reddy IA, Wasserman DH, Ayala JE, Hasty A, Abumrad NN, Galli A. Striatal dopamine homeostasis is altered in mice following Roux-en-Y gastric bypass surgery. ACS Chem Neurosci 2014; 5:943-51. [PMID: 25068716 PMCID: PMC4324416 DOI: 10.1021/cn500137d] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 07/25/2014] [Indexed: 12/13/2022] Open
Abstract
Roux-en-Y gastric bypass (RYGB) is an effective treatment for obesity. Importantly, weight loss following RYGB is thought to result in part from changes in brain-mediated regulation of appetite and food intake. Dopamine (DA) within the dorsal striatum plays an important role in feeding behavior; we therefore hypothesized that RYGB alters DA homeostasis in this subcortical region. In the current study, obese RYGB-operated mice consumed significantly less of a high-fat diet, weighed less by the end of the study, and exhibited lower adiposity than obese sham-operated mice. Interestingly, both RYGB and caloric restriction (pair feeding) resulted in elevated DA and reduced norepinephrine (NE) tissue levels compared with ad libitum fed sham animals. Consequently, the ratio of NE to DA, a measure of DA turnover, was significantly reduced in both of these groups. The RYGB mice additionally exhibited a significant increase in phosphorylation of tyrosine hydroxylase at position Ser31, a key regulatory site of DA synthesis. This increase was associated with augmented expression of extracellular-signal-regulated kinases ERK1/2, the kinase targeting Ser31. Additionally, RYGB has been shown in animal models and humans to improve insulin sensitivity and glycemic control. Curiously, we noted a significant increase in the expression of insulin receptor-β in RYGB animals in striatum (a glucosensing brain region) compared to sham ad libitum fed mice. These data demonstrate that RYGB surgery is associated with altered monoamine homeostasis at the level of the dorsal striatum, thus providing a critical foundation for future studies exploring central mechanisms of weight loss in RYGB.
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Affiliation(s)
- India A. Reddy
- Vanderbilt University Department
of Molecular Physiology
and Biophysics, Vanderbilt Brain Institute, Vanderbilt University Department
of Surgery, and Vanderbilt Mouse Metabolic Phenotyping Center, Vanderbilt University Medical Center, Nashville, Tennessee 37232, United States
| | - David H. Wasserman
- Vanderbilt University Department
of Molecular Physiology
and Biophysics, Vanderbilt Brain Institute, Vanderbilt University Department
of Surgery, and Vanderbilt Mouse Metabolic Phenotyping Center, Vanderbilt University Medical Center, Nashville, Tennessee 37232, United States
| | - Julio E. Ayala
- Diabetes
and Obesity Research Center, Sanford-Burnham
Medical Research Institute at Lake Nona, Orlando, Florida 32827, United States
| | - Alyssa
H. Hasty
- Vanderbilt University Department
of Molecular Physiology
and Biophysics, Vanderbilt Brain Institute, Vanderbilt University Department
of Surgery, and Vanderbilt Mouse Metabolic Phenotyping Center, Vanderbilt University Medical Center, Nashville, Tennessee 37232, United States
| | - Naji N. Abumrad
- Vanderbilt University Department
of Molecular Physiology
and Biophysics, Vanderbilt Brain Institute, Vanderbilt University Department
of Surgery, and Vanderbilt Mouse Metabolic Phenotyping Center, Vanderbilt University Medical Center, Nashville, Tennessee 37232, United States
| | - Aurelio Galli
- Vanderbilt University Department
of Molecular Physiology
and Biophysics, Vanderbilt Brain Institute, Vanderbilt University Department
of Surgery, and Vanderbilt Mouse Metabolic Phenotyping Center, Vanderbilt University Medical Center, Nashville, Tennessee 37232, United States
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35
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Association between sugar-sweetened and artificially sweetened soft drinks and type 2 diabetes: systematic review and dose-response meta-analysis of prospective studies. Br J Nutr 2014; 112:725-34. [PMID: 24932880 DOI: 10.1017/s0007114514001329] [Citation(s) in RCA: 207] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
The intake of sugar-sweetened soft drinks has been reported to be associated with an increased risk of type 2 diabetes, but it is unclear whether this is because of the sugar content or related lifestyle factors, whether similar associations hold for artificially sweetened soft drinks, and how these associations are related to BMI. We aimed to conduct a systematic literature review and dose-response meta-analysis of evidence from prospective cohorts to explore these issues. We searched multiple sources for prospective studies on sugar-sweetened and artificially sweetened soft drinks in relation to the risk of type 2 diabetes. Data were extracted from eleven publications on nine cohorts. Consumption values were converted to ml/d, permitting the exploration of linear and non-linear dose-response trends. Summary relative risks (RR) were estimated using a random-effects meta-analysis. The summary RR for sugar-sweetened and artificially sweetened soft drinks were 1·20/330 ml per d (95 % CI 1·12, 1·29, P< 0·001) and 1·13/330 ml per d (95 % CI 1·02, 1·25, P= 0·02), respectively. The association with sugar-sweetened soft drinks was slightly lower in studies adjusting for BMI, consistent with BMI being involved in the causal pathway. There was no evidence of effect modification, though both these comparisons lacked power. Overall between-study heterogeneity was high. The included studies were observational, so their results should be interpreted cautiously, but findings indicate a positive association between sugar-sweetened soft drink intake and type 2 diabetes risk, attenuated by adjustment for BMI. The trend was less consistent for artificially sweetened soft drinks. This may indicate an alternative explanation, such as lifestyle factors or reverse causality. Future research should focus on the temporal nature of the association and whether BMI modifies or mediates the association.
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