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Neyens DM, Brenner L, Calkins R, Winzenried ET, Ritter RC, Appleyard SM. CCK-sensitive C fibers activate NTS leptin receptor-expressing neurons via NMDA receptors. Am J Physiol Regul Integr Comp Physiol 2024; 326:R383-R400. [PMID: 38105761 DOI: 10.1152/ajpregu.00238.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Revised: 12/07/2023] [Accepted: 12/07/2023] [Indexed: 12/19/2023]
Abstract
The hormone leptin reduces food intake through actions in the peripheral and central nervous systems, including in the hindbrain nucleus of the solitary tract (NTS). The NTS receives viscerosensory information via vagal afferents, including information from the gastrointestinal tract, which is then relayed to other central nervous system (CNS) sites critical for control of food intake. Leptin receptors (lepRs) are expressed by a subpopulation of NTS neurons, and knockdown of these receptors increases both food intake and body weight. Recently, we demonstrated that leptin increases vagal activation of lepR-expressing neurons via increased NMDA receptor (NMDAR) currents, thereby potentiating vagally evoked firing. Furthermore, chemogenetic activation of these neurons was recently shown to inhibit food intake. However, the vagal inputs these neurons receive had not been characterized. Here we performed whole cell recordings in brain slices taken from lepRCre × floxedTdTomato mice and found that lepR neurons of the NTS are directly activated by monosynaptic inputs from C-type afferents sensitive to the transient receptor potential vanilloid type 1 (TRPV1) agonist capsaicin. CCK administered onto NTS slices stimulated spontaneous glutamate release onto lepR neurons and induced action potential firing, an effect mediated by CCKR1. Interestingly, NMDAR activation contributed to the current carried by spontaneous excitatory postsynaptic currents (EPSCs) and enhanced CCK-induced firing. Peripheral CCK also increased c-fos expression in these neurons, suggesting they are activated by CCK-sensitive vagal afferents in vivo. Our results indicate that the majority of NTS lepR neurons receive direct inputs from CCK-sensitive C vagal-type afferents, with both peripheral and central CCK capable of activating these neurons and NMDARs able to potentiate these effects.
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Affiliation(s)
- Drew M Neyens
- Department of Integrated Physiology and Neuroscience, Washington State University, Pullman, Washington, United States
| | - Lynne Brenner
- Department of Integrated Physiology and Neuroscience, Washington State University, Pullman, Washington, United States
| | - Rowan Calkins
- Department of Integrated Physiology and Neuroscience, Washington State University, Pullman, Washington, United States
| | - Eric T Winzenried
- Department of Integrated Physiology and Neuroscience, Washington State University, Pullman, Washington, United States
| | - Robert C Ritter
- Department of Integrated Physiology and Neuroscience, Washington State University, Pullman, Washington, United States
| | - Suzanne M Appleyard
- Department of Integrated Physiology and Neuroscience, Washington State University, Pullman, Washington, United States
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2
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Zhang X, Perry RJ. Metabolic underpinnings of cancer-related fatigue. Am J Physiol Endocrinol Metab 2024; 326:E290-E307. [PMID: 38294698 DOI: 10.1152/ajpendo.00378.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/14/2023] [Revised: 01/23/2024] [Accepted: 01/23/2024] [Indexed: 02/01/2024]
Abstract
Cancer-related fatigue (CRF) is one of the most prevalent and detrimental complications of cancer. Emerging evidence suggests that obesity and insulin resistance are associated with CRF occurrence and severity in cancer patients and survivors. In this narrative review, we analyzed recent studies including both preclinical and clinical research on the relationship between obesity and/or insulin resistance and CRF. We also describe potential mechanisms for these relationships, though with the caveat that because the mechanisms underlying CRF are incompletely understood, the mechanisms mediating the association between obesity/insulin resistance and CRF are similarly incompletely delineated. The data suggest that, in addition to their effects to worsen CRF by directly promoting tumor growth and metastasis, obesity and insulin resistance may also contribute to CRF by inducing chronic inflammation, neuroendocrinological disturbance, and metabolic alterations. Furthermore, studies suggest that patients with obesity and insulin resistance experience more cancer-induced pain and are at more risk of emotional and behavioral disruptions correlated with CRF. However, other studies implied a potentially paradoxical impact of obesity and insulin resistance to reduce CRF symptoms. Despite the need for further investigation utilizing interventions to directly elucidate the mechanisms of cancer-related fatigue, current evidence demonstrates a correlation between obesity and/or insulin resistance and CRF, and suggests potential therapeutics for CRF by targeting obesity and/or obesity-related mediators.
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Affiliation(s)
- Xinyi Zhang
- Departments of Cellular & Molecular Physiology and Medicine (Endocrinology), Yale University School of Medicine, New Haven, Connecticut, United States
| | - Rachel J Perry
- Departments of Cellular & Molecular Physiology and Medicine (Endocrinology), Yale University School of Medicine, New Haven, Connecticut, United States
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3
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Flores MR, Zúñiga SS. Endogenous Opioids in the Homeostatic Regulation of Hunger, Satiety, and Hedonic Eating: Neurobiological Foundations. ADVANCES IN NEUROBIOLOGY 2024; 35:315-327. [PMID: 38874730 DOI: 10.1007/978-3-031-45493-6_16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2024]
Abstract
This chapter (part one of a trilogy) summarizes the neurobiological foundations of endogenous opioids in the regulation of energy balance and eating behavior, dysregulation of which translates to maladaptive dietary responses in individuals with obesity and eating disorders, including anorexia, bulimia, and binge eating disorder. Knowledge of these neurobiological foundations is vital to researchers' and clinicians' understanding of pathophysiology as well as the science-based development of multidisciplinary diagnoses and treatments for obesity and eating disorders. We highlight mechanisms of endogenous opioids in both homeostatic and hedonic feeding behavior, review research on the dysregulation of food reward that plays a role in a wide array of obesity and disordered eating, and the clinical implications of neurobiological responses to food for current science-based treatments for obesity and eating disorders.
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Affiliation(s)
- Marcela Rodriguez Flores
- Obesity and Eating Disorders Clinic, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Tlalpan, Mexico
- Department of Brain Sciences, Imperial College London, Hammersmith Hospital, London, UK
| | - Sylvana Stephano Zúñiga
- Obesity and Eating Disorders Clinic, Instituto Nacional de Ciencias Médicas y Nutrición Salvador Zubirán, Tlalpan, Mexico
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4
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Wu SK, Chen WJ, Chang JPC, Guu TW, Hsin MC, Huang CK, Mischoulon D, Capuron L, Su KP. Personalized Medicine of Omega-3 Fatty Acids in Depression Treatment in Obese and Metabolically Dysregulated Patients. J Pers Med 2023; 13:1003. [PMID: 37373992 DOI: 10.3390/jpm13061003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2023] [Revised: 06/07/2023] [Accepted: 06/12/2023] [Indexed: 06/29/2023] Open
Abstract
The co-occurrence of depression and obesity has become a significant public health concern worldwide. Recent studies have shown that metabolic dysfunction, which is commonly observed in obese individuals and is characterized by inflammation, insulin resistance, leptin resistance, and hypertension, is a critical risk factor for depression. This dysfunction may induce structural and functional changes in the brain, ultimately contributing to depression's development. Given that obesity and depression mutually increase each other's risk of development by 50-60%, there is a need for effective interventions that address both conditions. The comorbidity of depression with obesity and metabolic dysregulation is thought to be related to chronic low-grade inflammation, characterized by increased circulating levels of pro-inflammatory cytokines and C-reactive protein (CRP). As pharmacotherapy fails in at least 30-40% of cases to adequately treat major depressive disorder, a nutritional approach is emerging as a promising alternative. Omega-3 polyunsaturated fatty acids (n-3 PUFAs) are a promising dietary intervention that can reduce inflammatory biomarkers, particularly in patients with high levels of inflammation, including pregnant women with gestational diabetes, patients with type 2 diabetes mellitus, and overweight individuals with major depressive disorder. Further efforts directed at implementing these strategies in clinical practice could contribute to improved outcomes in patients with depression, comorbid obesity, and/or metabolic dysregulation.
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Grants
- MOST 109-2320-B-038-057-MY3, 110-2321-B-006-004, 110-2811-B-039-507, 110-2320-B-039-048-MY2,110-2320-B-039-047-MY3, 110-2813-C-039-327-B, 110-2314-B-039-029-MY3, 111-2321-B-006-008, and NSTC 111-2314-B-039-041-MY3 Ministry of Science and Technology, Taiwan
- ANHRF 109-31, 109-40, 110-13, 110-26, 110-44, 110-45, 111-27, 111-28, 111-47, 111-48, and 111-52 An-Nan Hospital, China Medical University, Tainan, Taiwan
- CMRC-CMA-2 Ministry of Education (MOE), Taiwan
- CMU 110-AWARD-02, 110-N-17, 1110-SR-73 China Medical University, Taichung, Taiwan
- DMR-106-101, 106-227, 109-102, 109-244, 110-124, 111-245, 112-097, 112-086, 112-109, 112-232 and DMR-HHC-109-11, HHC-109-12, HHC-110-10, and HHC-111-8 China Medical University Hospital, Taichung, Taiwan
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Affiliation(s)
- Suet-Kei Wu
- Graduate Institute of Nutrition, China Medical University, Taichung 404, Taiwan
- Mind-Body Interface Research Center (MBI-Lab), China Medical University Hospital, Taichung 404, Taiwan
| | - Wei-Jen Chen
- An-Nan Hospital, China Medical University, Tainan 709, Taiwan
| | - Jane Pei-Chen Chang
- Mind-Body Interface Research Center (MBI-Lab), China Medical University Hospital, Taichung 404, Taiwan
- Department of Psychiatry, China Medical University Hospital, Taichung 404, Taiwan
- College of Medicine, China Medical University, Taichung 404, Taiwan
| | - Ta-Wei Guu
- Mind-Body Interface Research Center (MBI-Lab), China Medical University Hospital, Taichung 404, Taiwan
- Division of Psychiatry, Department of Internal Medicine, China Medical University Beigang Hospital, Yunlin 651, Taiwan
| | - Ming-Che Hsin
- Body Science & Metabolic Disorders International Medical Centre (BMIMC), China Medical University & Hospital, Taichung 404, Taiwan
| | - Chih-Kun Huang
- Body Science & Metabolic Disorders International Medical Centre (BMIMC), China Medical University & Hospital, Taichung 404, Taiwan
| | - David Mischoulon
- Depression Clinical and Research Program, Massachusetts General Hospital, Harvard Medical School, Boston, MA 02114, USA
| | - Lucile Capuron
- NutriNeuro, University of Bordeaux, INRAE, Bordeaux INP, UMR 1286, F-33076 Bordeaux, France
| | - Kuan-Pin Su
- Mind-Body Interface Research Center (MBI-Lab), China Medical University Hospital, Taichung 404, Taiwan
- An-Nan Hospital, China Medical University, Tainan 709, Taiwan
- Department of Psychiatry, China Medical University Hospital, Taichung 404, Taiwan
- College of Medicine, China Medical University, Taichung 404, Taiwan
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Energy-balance and carbohydrate-insulin models of obesity are not competing propositions. Int J Obes (Lond) 2023; 47:95-97. [PMID: 36536065 DOI: 10.1038/s41366-022-01249-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Revised: 12/10/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022]
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6
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Valinejad A, Khodaei K. Does exercise during a ketogenic diet effectively alter appetite sensation, appetite-regulating hormones, and body composition? Exp Biol Med (Maywood) 2022; 247:1898-1906. [PMID: 35920294 PMCID: PMC9742743 DOI: 10.1177/15353702221113862] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Exercise and diet are two essential interventions in weight control. The purpose of this study was to compare the effectiveness of two exercise training types during a ketogenic diet (KD) on appetite sensation, appetite-regulating hormones, and body composition in overweight or obese man. Thirty-six men, overweight or with obesity, voluntarily participated in this study. The participants were randomly assigned into three groups, including KD (n = 12), aerobic training during KD (AT-KD) (n = 12), and resistance training during KD (RT-KD) (n = 12) groups. The participants followed a low-carbohydrate diet for 6 weeks. Exercise training programs consisted of three sessions per week over 6 weeks. Appetite sensation was analyzed using a visual analogue scale (VAS) in fasting and postprandial states. The Enzyme-Linked Immunosorbent Assay (ELISA) method analyzed appetite-regulating hormones, including spexin, leptin, and acylated ghrelin, in a fasting state. Body composition was measured using bioelectrical impedance analysis (BIA). Furthermore, the ketosis state was monitored by measuring urinary ketones weekly. The results indicated that in both AT-KD and RT-KD groups, spexin and acylated ghrelin increased while leptin decreased without any between-group differences. Hunger and prospective food consumption (PFC) declined while satiety and fullness increased in all groups. The AT-KD group experienced a significant decrease in hunger and PFC, while fullness increased compared with the KD group. Fat mass, weight, and body mass index (BMI) decreased in all groups. Lean body mass increased in the RT-KD group (+2.66 kg) compared with both AT-KD and KD groups (-1.71 and -1.33 kg, respectively). This study demonstrated that AT-KD and RT-KD effectively altered appetite-regulating hormones and suppressed appetite sensation. In addition, both interventions had a favorable effect on weight loss and body fat reduction, with a more pronounced effect of RT-KD on maintaining lean body mass in overweight or obese men.
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The Role of Gut Microbiota Modulation Strategies in Obesity: The Applications and Mechanisms. FERMENTATION-BASEL 2022. [DOI: 10.3390/fermentation8080376] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Nowadays, obesity is a leading public health problem worldwide. The growing prevalence of obesity significantly accounts for other cardio-metabolic diseases, including hypertension and diabetes. Several studies have shown that obesity is strongly associated with genetic, environmental, lifestyle, and dietary factors, especially the disordered profiles of gut microbiota (GM). The present review concluded mechanistic studies and potential correspondent treatments for obesity. Specifically, the anti-obesity effects of food-derived compounds manipulating GM were highlighted. The potential limitations of bioactive compounds on absorption in the intestinal tract were also discussed. Thus, the future direction of fecal microbiota transplantation (FMT) as an approach to support modulating host GM (considered to be a potential therapeutic target for obesity) was discussed. This review shed light on the role of GM modulation strategies for the prevention/treatment of obesity.
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Rodríguez-López R, Gimeno-Ferrer F, do Santos DA, Ferrer-Bolufer I, Luján CG, Alcalá OZ, García-Banacloy A, Cogollos VB, Juan CS. Reviewed and updated Algorithm for Genetic Characterization of Syndromic Obesity Phenotypes. Curr Genomics 2022; 23:147-162. [PMID: 36777005 PMCID: PMC9878830 DOI: 10.2174/1389202923666220426093436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2021] [Revised: 11/30/2021] [Accepted: 02/01/2022] [Indexed: 11/22/2022] Open
Abstract
Background: Individuals with a phenotype of early-onset severe obesity associated with intellectual disability can have molecular diagnoses ranging from monogenic to complex genetic traits. Severe overweight is the major sign of a syndromic physical appearance and predicting the influence of a single gene and/or polygenic risk profile is extremely complicated among the majority of the cases. At present, considering rare monogenic bases as the principal etiology for the majority of obesity cases associated with intellectual disability is scientifically poor. The diversity of the molecular bases responsible for the two entities makes the appliance of the current routinely powerful genomics diagnostic tools essential. Objective: Clinical investigation of these difficult-to-diagnose patients requires pediatricians and neurologists to use optimized descriptions of signs and symptoms to improve genotype correlations. Methods: The use of modern integrated bioinformatics strategies which are conducted by experienced multidisciplinary clinical teams. Evaluation of the phenotype of the patient's family is also of importance. Results: The next step involves discarding the monogenic canonical obesity syndromes and considering infrequent unique molecular cases, and/or then polygenic bases. Adequate management of the application of the new technique and its diagnostic phases is essential for achieving good cost/efficiency balances. Conclusion: With the current clinical management, it is necessary to consider the potential coincidence of risk mutations for obesity in patients with genetic alterations that induce intellectual disability. In this review, we describe an updated algorithm for the molecular characterization and diagnosis of patients with a syndromic obesity phenotype.
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Affiliation(s)
- Raquel Rodríguez-López
- Laboratory of Molecular Genetics, Clinical Analysis Service, General Hospital Consortium of Valencia, Valencia, Spain;,Address correspondence to this author at the Laboratory of Molecular Genetics, Clinical Analysis Service, General Hospital Consortium of Valencia, Avenida de las Tres Cruces no. 2 46014, Valencia, Spain; Tel: 0034 963 131 800 – 437317; Fax: 0034 963 131 979; E-mail:
| | - Fátima Gimeno-Ferrer
- Laboratory of Molecular Genetics, Clinical Analysis Service, General Hospital Consortium of Valencia, Valencia, Spain
| | - David Albuquerque do Santos
- Laboratory of Molecular Genetics, Clinical Analysis Service, General Hospital Consortium of Valencia, Valencia, Spain
| | - Irene Ferrer-Bolufer
- Laboratory of Molecular Genetics, Clinical Analysis Service, General Hospital Consortium of Valencia, Valencia, Spain
| | - Carola Guzmán Luján
- Laboratory of Molecular Genetics, Clinical Analysis Service, General Hospital Consortium of Valencia, Valencia, Spain
| | - Otilia Zomeño Alcalá
- Laboratory of Molecular Genetics, Clinical Analysis Service, General Hospital Consortium of Valencia, Valencia, Spain
| | - Amor García-Banacloy
- Laboratory of Molecular Genetics, Clinical Analysis Service, General Hospital Consortium of Valencia, Valencia, Spain
| | | | - Carlos Sánchez Juan
- Endocrinology Service, General Hospital Consortium of Valencia, Valencia, Spain
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Eugenol alleviated nonalcoholic fatty liver disease in rat via a gut-brain-liver axis involving glucagon-like Peptide-1. Arch Biochem Biophys 2022; 725:109269. [DOI: 10.1016/j.abb.2022.109269] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 04/27/2022] [Accepted: 04/28/2022] [Indexed: 12/16/2022]
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10
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SULISTYOWATI E, HANDAYANI D, SOEHARTO S, RUDIJANTO A. A high-fat and high-fructose diet lowers the cecal digesta's weight and short-chain fatty acid level of a Sprague-Dawley rat model. Turk J Med Sci 2022; 52:268-275. [PMID: 36161602 PMCID: PMC10734861 DOI: 10.3906/sag-1911-14] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2019] [Revised: 02/22/2022] [Accepted: 02/20/2021] [Indexed: 11/03/2022] Open
Abstract
BACKGROUND This study aimed to analyze the effect of a high-fat and high-fructose diet (HFFD) on the digesta weight and shortchain fatty acid (SCFA) levels of cecal digesta in rats. METHODS This study was an experimental study with a posttest-only control group design with male Sprague-Dawley strain rats as the samples. A total of 36 rats were divided into two groups with normal diet (N) and modified HFFD. The data of energy intake, nutrients and fiber, body weight, Lee index, abdominal circumference, digesta weight, and SCFA levels of cecal digesta were collected. RESULTS The results showed an 11.94% increase in body weights of rats with HFFD. The total energy intake of the HFFD group was significantly higher than that of N (p = 0.000). The fiber intake and cecal digesta weight in group N were higher than that in the HFFD group (p = 0.00 and p = 0.02, respectively). The concentrations of acetate, butyrate, propionate, and total SCFA in the N group were significantly higher than in the HFFD (p = 0.041,,p = 0.004, p = 0.040, p = 0.013, respectively). A significant negative relationship was observed between the abdominal circumference and cecal digesta concentration (p = 0.029; r = -0.529) and between the Lee index and the SCFA concentration of cecal digesta (p = 0.036, r = -0.206).
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Affiliation(s)
- Etik SULISTYOWATI
- Department of Nutrition, Malang State Health Polytechnic Ministry of Health, Malang
Indonesia
| | - Dian HANDAYANI
- School of Nutrition, Faculty of Medicine, Brawijaya University, Malang,
Indonesia
| | - Setyawati SOEHARTO
- Department of Pharmacology, Faculty of Medicine, Brawijaya University, Malang,
Indonesia
| | - Achmad RUDIJANTO
- Department of Endocrinology, Faculty of Medicine, Brawijaya University, Malang,
Indonesia
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Effect of acute dietary- versus combined dietary and exercise-induced energy deficits on subsequent energy intake, appetite and food reward in adolescents with obesity. Physiol Behav 2022; 244:113650. [PMID: 34798127 DOI: 10.1016/j.physbeh.2021.113650] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2021] [Revised: 11/11/2021] [Accepted: 11/13/2021] [Indexed: 11/22/2022]
Abstract
BACKGROUND Acute dietary-induced energy deficits have been shown to favor compensatory appetitive responses. The aim of this study was to compare energy intake (EI), appetite sensations and the hedonic responses to equivalent energy deficits induced by dietary restriction alone and combined with exercise in adolescents with obesity. METHODS In a within-subjects design, seventeen adolescents with obesity (12-16 years, Tanner stage 3-5, 6 males) randomly completed three 14 h conditions: (i) control (CON); (ii) deficit induced by diet only (Def-EI) and; (iii) deficit induced by combined diet and physical exercise (Def-mixed). Breakfast and lunch were calibrated to generate a 500 kcal deficit in Def-EI and 250 kcal deficit in Def-mixed. A 250 kcal deficit was created through a cycling exercise set at 65% VO2peak in Def-mixed. Ad libitum EI, macronutrients and relative EI (REI) were assessed at dinner, subjective appetite sensations taken at regular intervals, and food reward measured before dinner. RESULTS EI at dinner was significantly lower in Def-EI compared to CON (p = 0.014; Effect size (ES): -0.59 [-1.07; -0.12]), with no difference between Def-mixed and both CON and Def-EI. Total REI was lower in both deficit conditions compared with CON (Def-mixed: p < 0.001; ES: -3.80 [-4.27; -3.32], Def-EI: p < 0.001; ES: -4.90 [-5.37; -4.42] respectively), indicating incomplete compensation for the energy deficits. Absolute protein ingestion at dinner was lower in Def-EI than Def-mixed (p = 0.037; ES: -0.50 [-0.98; -0.03]) and absolute lipid ingestion was lower in Def-EI than in CON (p = 0.033; ES: -0.51 [-0.99; -0.04]). A higher proportion of protein and a lower proportion of carbohydrates was observed in Def-mixed than in Def-EI (p = 0.078; ES: -0.42 [-0.90; 0.04] and p = 0.067; ES: 0.44 [-0.03; 0.92] respectively). Total area under the curve for appetite sensations were similar between conditions. Explicit liking for sweet relative to savoury food was lower in Def-mixed compared to CON (p = 0.027; ES: -0.53 [-1.01; -0.06]) with no difference in food reward between Def-EI and CON. CONCLUSION Neither of the two acute isoenergetic deficits led to subsequent appetitive compensation, with the dietary deficit even inducing a lower ad libitum EI at the subsequent dinner. Further studies are needed to better understand the appetitive response to dietary and exercise energy balance manipulations in this population.
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12
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Flack KD, Anderson RE, McFee KF, Kryscio R, Rush CR. Exercise Increases Attentional Bias Towards Food Cues in Individuals Classified as Overweight to Obese. Physiol Behav 2022; 247:113711. [PMID: 35066060 PMCID: PMC8845497 DOI: 10.1016/j.physbeh.2022.113711] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 01/18/2022] [Accepted: 01/19/2022] [Indexed: 11/28/2022]
Abstract
BACKGROUND The obesity epidemic continues to be a major public health concern. Although exercise is the most common weight loss recommendation, weight loss outcomes from an exercise program are often suboptimal. The human body compensates for a large percentage of the energy expended through exercise to maintain energy homeostasis and body weight. Increases in energy intake appear to be the most impactful compensatory behavior. Research on the mechanisms driving this behavior has not been fully elucidated. PURPOSE To determine if exercise influences the attentional processing towards food cues (attentional bias) and inhibitory control for food cues among individuals classified as overweight to obese who do not exercise. METHODS Thirty adults classified as overweight to obese participated in a counterbalanced, crossover trial featuring two assessment visits on separate days separated by at least one week. Attentional bias and inhibitory control towards food cues was assessed prior to and after a bout of exercise where participants expended 500 kcal (one assessment visit) and before and after a 60 min bout of watching television (second assessment visit). Attentional bias was conceptualized as the percentage of time fixated on food cues when both food and neutral (non-food) cues were presented during a food-specific dot-probe task. Inhibitory control, specifically motor impulsivity, was assessed as percentage of inhibitory failures during a food-specific Go/NoGo task. RESULTS A significant condition by time effect was observed for attentional bias towards food cues, independent of hunger, whereas attentional bias towards food cues was increased pre-post exercise but not after watching TV. Inhibitory control was not affected by exercise or related to attentional bias for food cues. CONCLUSIONS An acute bout of exercise increased attentional bias for food cues, pointing to a mechanism that may contribute to the weight loss resistance observed with exercise. Future trials are needed to evaluate attentional bias towards food cues over a longitudinal exercise intervention.
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Affiliation(s)
- Kyle D Flack
- Department of Dietetics and Human Nutrition, College of Agriculture, University of Kentucky, Lexington, KY United States.
| | - Robert E Anderson
- Department of Dietetics and Human Nutrition, College of Agriculture, University of Kentucky, Lexington, KY United States
| | - Kylie F McFee
- Department of Dietetics and Human Nutrition, College of Agriculture, University of Kentucky, Lexington, KY United States.
| | - Richard Kryscio
- Department of Statistics, University of Kentucky, Lexington, KY United States
| | - Craig R Rush
- Department of Behavioral Sciences, College of Medicine, University of Kentucky, Lexington, KY United States; Department of Psychiatry, College of Medicine, University of Kentucky, Lexington, KY United States; Department of Psychology, College of Arts and Sciences, University of Kentucky, Lexington, KY United States
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13
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Ullah H, Khan AS, Murtaza B, Hichami A, Khan NA. Tongue Leptin Decreases Oro-Sensory Perception of Dietary Fatty Acids. Nutrients 2021; 14:nu14010197. [PMID: 35011070 PMCID: PMC8746778 DOI: 10.3390/nu14010197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 12/24/2021] [Accepted: 12/26/2021] [Indexed: 11/16/2022] Open
Abstract
Leptin, an anorectic hormone, regulates food intake, energy expenditure and body weight. We assessed the implication of tongue leptin in the modulation of oro-sensory detection of dietary fatty acids in mice. The RT-PCR analysis showed that mRNA encoding leptin and leptin receptor (Ob-Rb) was expressed in mice taste bud cells (TBC). Confocal microscopic studies showed that the lipid sensor CD36 was co-expressed with leptin in mice TBC. Silencing of leptin or Ob-Rb mRNA in tongue papillae upregulated preference for a long-chain fatty acid (LCFA), i.e., linoleic acid (LA), in a two-bottle paradigm in mice. Furthermore, tongue leptin application decreased the preference for the LCFA. These results suggest that tongue leptin exerts an inhibitory action on fatty acid preference. In isolated mice TBC, leptin decreased LCFA-induced increases in free intracellular calcium concentrations, [Ca2+]i. Leptin and LCFA induced the phosphorylation of ERK1/2 and STAT-3 and there were no additive or opposite effects of the two agents on the degree of phosphorylation. However, leptin, but not the LCFA, induced phosphoinositide-3-kinase (PI-3-K)-dependent Akt phosphorylation in TBC. Furthermore, leptin induced hyperpolarization, whereas LCFA induced depolarization in TBC. Our study demonstrates that tongue leptin exerts an inhibitory action on oro-sensory detection of a dietary fatty acid by interfering with Ca2+ signaling and membrane potential in mice TBC.
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Lim SY, Dora R, Yatiman NH, Wong JE, Haron H, Poh BK. No effect of monosodium glutamate on subjective appetite and subsequent energy intake in children of different ethnicities. Appetite 2021; 167:105629. [PMID: 34364967 DOI: 10.1016/j.appet.2021.105629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 07/22/2021] [Accepted: 08/04/2021] [Indexed: 10/20/2022]
Abstract
Studies have shown that monosodium glutamate (MSG) can enhance satiety and reduce appetite among infants and adults. In a multi-ethnic country such as Malaysia, it is also important to consider whether ethnic variations will influence the effects of MSG on appetite regulation. Thus, this crossover study aimed to investigate the effects of MSG on the subjective appetite and subsequent energy intake among Malaysian children from the three major ethnic groups, namely the Malays, Chinese and Indians. A total of 92 participants aged 9-11 years from the three ethnic groups were recruited for this study. A cup of low-energy vegetable preload soup (100g, with MSG or without MSG) was served to each of the participants on the day of the study, followed by an ad libitum meal 45 min later. Appetite ratings of hunger, fullness, desire to eat and desire to snack were recorded using visual analogue scale (VAS) before the preload, after the preload, before the ad libitum meal and after the ad libitum meal. Results showed that the subjective appetite of the children did not differ between preload conditions (MSG+ or MSG-) throughout the study. Malay, Chinese and Indian children had similar total energy intake during the subsequent meal after the consumption of preload soups. In conclusion, the addition of MSG to low energy preload neither influenced the perception of appetite nor total energy intake in a subsequent ad libitum meal among children. No difference attributable to the participants' ethnicity was observed. Future studies should be conducted to examine whether repeated ingestion of MSG-containing protein-rich preload has potential longer-term effects on appetite and subsequent meal intakes among children from different ethnicities.
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Affiliation(s)
- Sim Yee Lim
- Nutritional Sciences Programme & Centre for Community Health Studies (ReaCH), Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300, Kuala, Lumpur, Malaysia.
| | - Rosmawati Dora
- Nutritional Sciences Programme & Centre for Community Health Studies (ReaCH), Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300, Kuala, Lumpur, Malaysia.
| | - Noor Hafizah Yatiman
- Nutritional Sciences Programme & Centre for Community Health Studies (ReaCH), Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300, Kuala, Lumpur, Malaysia.
| | - Jyh Eiin Wong
- Nutritional Sciences Programme & Centre for Community Health Studies (ReaCH), Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300, Kuala, Lumpur, Malaysia.
| | - Hasnah Haron
- Nutritional Sciences Programme & Centre for Community Health Studies (ReaCH), Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300, Kuala, Lumpur, Malaysia.
| | - Bee Koon Poh
- Nutritional Sciences Programme & Centre for Community Health Studies (ReaCH), Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, 50300, Kuala, Lumpur, Malaysia.
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15
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Puklin L, Cartmel B, Harrigan M, Lu L, Li FY, Sanft T, Irwin ML. Randomized trial of weight loss on circulating ghrelin levels among breast cancer survivors. NPJ Breast Cancer 2021; 7:49. [PMID: 33976224 PMCID: PMC8113314 DOI: 10.1038/s41523-021-00260-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 04/08/2021] [Indexed: 02/05/2023] Open
Abstract
Obesity among breast cancer survivors is associated with increased risk for recurrence and mortality. The hormone ghrelin plays a role in initiating appetite and thus regulating body weight. This study aims to determine the effect of a lifestyle intervention on ghrelin levels in breast cancer survivors with a body mass index (BMI) ≥ 25 kg/m2. The Lifestyle, Exercise, and Nutrition (LEAN) study was a 6-month randomized trial, examining the effectiveness of a weight loss intervention versus usual care in 151 breast cancer survivors with BMI ≥ 25 kg/m2. Ghrelin was measured in fasting baseline and 6-month blood samples. Baseline associations between ghrelin, body composition, and blood biomarkers were examined. Six-month change in ghrelin was compared between study arms. Ghrelin measurements were available for 149 women. At baseline, ghrelin was correlated with age (r = 0.28, p < 0.001) and inversely correlated with weight (r = -0.18, p = 0.03), lean body mass (r = -0.18, p = 0.02), and leptin (r = -0.18, p = 0.03). Over 6 months, ghrelin increased by 144 pg/mL (7.2%) in the intervention and decreased by 466 pg/mL (32.5%) in the usual care (p = 0.07). Among all women, greater weight loss was associated with an increase in ghrelin (p = 0.01). These findings indicate that weight loss, achieved through a lifestyle intervention, is associated with higher ghrelin levels in breast cancer survivors which may be informative for developing sustainable weight loss programming for this population. Future research should investigate the long term impacts of lifestyle interventions on ghrelin levels in the context of weight maintenance and weight regain.
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Affiliation(s)
- Leah Puklin
- Yale University School of Public Health, New Haven, CT, USA.
| | - Brenda Cartmel
- Yale University School of Public Health, New Haven, CT, USA
- Yale Cancer Center, Yale University School of Medicine, New Haven, CT, USA
| | - Maura Harrigan
- Yale University School of Public Health, New Haven, CT, USA
| | - Lingeng Lu
- Yale University School of Public Health, New Haven, CT, USA
| | - Fang-Yong Li
- Yale University School of Public Health, New Haven, CT, USA
| | - Tara Sanft
- Yale Cancer Center, Yale University School of Medicine, New Haven, CT, USA
| | - Melinda L Irwin
- Yale University School of Public Health, New Haven, CT, USA
- Yale Cancer Center, Yale University School of Medicine, New Haven, CT, USA
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16
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Wijarn P, Poomthavorn P, Khlairit P, Pongratanakul S, Chailurkit L, Mahachoklertwattana P. Short-term effects of gonadotropin-releasing hormone analogue treatment on leptin, ghrelin and peptide YY in girls with central precocious puberty. J Pediatr Endocrinol Metab 2021; 34:479-484. [PMID: 33655737 DOI: 10.1515/jpem-2020-0470] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2020] [Accepted: 01/02/2021] [Indexed: 11/15/2022]
Abstract
OBJECTIVES To determine appetite-regulating hormone levels in girls with central precocious puberty (CPP) before and after 20 weeks of gonadotropin-releasing hormone analogue (GnRH-A) treatment. METHODS Eighteen newly diagnosed CPP girls were enrolled. Body composition measured by bioelectrical impedance analysis and GnRH-A test were performed with fasting serum leptin, ghrelin and peptide YY (PYY) measurements at baseline (before) and after 20 weeks of GnRH-A treatment. RESULTS Following GnRH-A treatment, all patients had prepubertal gonadotropin and estradiol levels. Mean (SD) fat mass index (FMI) was significantly increased from 4.5 (1.7) to 5.0 (1.8) kg/m2 after treatment. Also, median (IQR) serum leptin level was significantly increased from 6.9 (4.2-8.6) to 7.4 (5.3-13.1) ng/mL. FMI had a positive correlation with serum leptin level (r=0.64, p=0.004). In contrast, no significant changes of serum ghrelin and PYY levels were observed. CONCLUSIONS Decreased estrogen following short-term GnRH-A treatment in CPP girls may cause an increase in appetite and consequently an elevation of FMI. Increased serum leptin may be a result of having increased FMI secondary to an increase in appetite.
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Affiliation(s)
- Piyathida Wijarn
- Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Preamrudee Poomthavorn
- Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Patcharin Khlairit
- Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Sarunyu Pongratanakul
- Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Laor Chailurkit
- Department of Medicine, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
| | - Pat Mahachoklertwattana
- Department of Pediatrics, Faculty of Medicine Ramathibodi Hospital, Mahidol University, Bangkok, Thailand
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17
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Handayani D, Febrianingsih E, Desi Kurniawati A, Kusumastuty I, Nurmalitasari S, Widyanto RM, Oktaviani DN, Maghfirotun Innayah A, Sulistyowati E. High-fructose diet initially promotes increased aortic wall thickness, liver steatosis, and cardiac histopathology deterioration, but does not increase body fat index. J Public Health Res 2021; 10:2181. [PMID: 33855398 PMCID: PMC8129768 DOI: 10.4081/jphr.2021.2181] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2021] [Accepted: 03/15/2021] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Dietary fats and fructose have been responsible for inducing obesity and body tissues damage due to the consequence of metabolic syndrome through several mechanisms. The body fat index (BFI) is one of the anthropometric measures used to detect obesity in rats. This study aims to examine the correlation between high-fat high-fructose diet and liver steatosis cell count, early atherosclerosis characteristics, and BFI in Sprague Dawley Rats. DESIGN AND METHODS This was an experimental design using 2 groups of 12-weeks-old Sprague Dawley (SD) rats. The control group received a standard diet and tap water beverages for 17 weeks. The intervention group was fed with high-fat diet from modified AIN 93-M and additional 30% fructose drink. We analyzed the foam cell count, aortic wall thickness, cardiac histopathology, and liver steatosis cell count after the sacrifice process. RESULTS The rats in the intervention group had a higher aortic wall thickness, liver steatosis, and foam cell count (+125%, p<0.01; +317%, p<0.01 and +165%, p<0.01 respectively) compared to the control group. The intervention group also showed higher mononuclear inflammatory and hypertrophic cell count. A significant positive correlation was found between dietary fructose with premature atherosclerosis by increasing foam cell count (r=0.66) and aortic wall thickness (r=0.68). In addition, 30% dietary fructose increased liver steatosis (r =0.69) and mononuclear inflammatory cardiac cell count (r=0.61). Interestingly, the intervention had no effect on BFI (p>0.5; r=0.13). CONCLUSIONS Dietary fat and fructose consumption for 17 weeks promote atherosclerosis, liver steatosis, and cardiac histopathology alteration without increasing BFI.
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Affiliation(s)
- Dian Handayani
- Department of Nutrition, Faculty of Medicine, Universitas Brawijaya, Malang.
| | | | | | - Inggita Kusumastuty
- Department of Nutrition, Faculty of Medicine, Universitas Brawijaya, Malang.
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18
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Yu Y, He X, Zhang J, Tang C, Rong P. Transcutaneous auricular vagal nerve stimulation inhibits hypothalamic P2Y1R expression and attenuates weight gain without decreasing food intake in Zucker diabetic fatty rats. Sci Prog 2021; 104:368504211009669. [PMID: 33848220 PMCID: PMC10358456 DOI: 10.1177/00368504211009669] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Zucker diabetic fatty (ZDF) rats that harbor a mutation in the leptin receptor innately develop type 2 diabetes (T2D) with obesity. Transcutaneous auricular vagal nerve stimulation (taVNS) has an antidiabetic effect in ZDF rats. However, the underlying mechanisms of the weight-gain attenuating effect in ZDF rats by taVNS is still unclear. This study aimed to assess whether the weight-gain attenuating effect of taVNS in ZDF rats is associated with changes in the central nervous system (CNS) expression of P2Y1 receptors (P2Y1R). Adult male ZDF rats were subjected to taVNS and transcutaneous non-vagal nerve stimulation (tnVNS). Their food intake and body weight were recorded daily and weekly, respectively. P2Y1R expression in the hypothalamus, amygdala, and hippocampus was evaluated by western blotting. Hypothalamic P2Y1R expressing cells were detected using immunohistochemistry. Naïve ZDF rats were much heavier (p < 0.05) than their lean littermates (ZL rats), with elevated hypothalamic P2Y1R expression (p < 0.05). Further, taVNS but not tnVNS attenuated weight gain (p < 0.05) without decreasing food intake (p > 0.05) and suppressed hypothalamic P2Y1R expression in ZDF rats (p < 0.05). Moreover, P2Y1R showed major expression in astrocytes of ZDF rats' hypothalamus. ZDF rats innately develop obesity associated with elevated hypothalamic P2Y1R expression. taVNS attenuates weight gain in ZDF rats without changes in food intake, suggesting increased energy expenditure. Whether the reduced hypothalamic P2Y1R expression in response to taVNS is mechanistically linked to the increased energy expenditure remains to be determined.
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Affiliation(s)
- Yutian Yu
- Acupuncture Department, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
- Ninth School of Clinical Medicine, Peking University, Beijing, China
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Xun He
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Jinling Zhang
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
| | - Chunzhi Tang
- Clinical Medical College of Acupuncture, Moxibustion and Rehabilitation, Guangzhou University of Chinese Medicine, Guangzhou, Guangdong, China
| | - Peijing Rong
- Institute of Acupuncture and Moxibustion, China Academy of Chinese Medical Sciences, Beijing, China
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19
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Angiopoietin-Like Growth Factor Involved in Leptin Signaling in the Hypothalamus. Int J Mol Sci 2021; 22:ijms22073443. [PMID: 33810547 PMCID: PMC8037945 DOI: 10.3390/ijms22073443] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 03/20/2021] [Accepted: 03/24/2021] [Indexed: 11/26/2022] Open
Abstract
The hypothalamic regulation of appetite governs whole-body energy balance. Satiety is regulated by endocrine factors including leptin, and impaired leptin signaling is associated with obesity. Despite the anorectic effect of leptin through the regulation of the hypothalamic feeding circuit, a distinct downstream mediator of leptin signaling in neuron remains unclear. Angiopoietin-like growth factor (AGF) is a peripheral activator of energy expenditure and antagonizes obesity. However, the regulation of AGF expression in brain and localization to mediate anorectic signaling is unknown. Here, we demonstrated that AGF is expressed in proopiomelanocortin (POMC)-expressing neurons located in the arcuate nucleus (ARC) of the hypothalamus. Unlike other brain regions, hypothalamic AGF expression is stimulated by leptin-induced signal transducers and activators of transcription 3 (STAT3) phosphorylation. In addition, leptin treatment to hypothalamic N1 cells significantly enhanced the promoter activity of AGF. This induction was abolished by the pretreatment of ruxolitinib, a leptin signaling inhibitor. These results indicate that hypothalamic AGF expression is induced by leptin and colocalized to POMC neurons.
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20
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Jo A, Kim M, Kim JI, Ha J, Hwang YS, Nam H, Hwang I, Kim JB, Park SB. Phenotypic Discovery of SB1501, an Anti-obesity Agent, through Modulating Mitochondrial Activity. ChemMedChem 2021; 16:1104-1115. [PMID: 33538065 DOI: 10.1002/cmdc.202100062] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Indexed: 11/08/2022]
Abstract
Obesity has become a pandemic that threatens the quality of life and discovering novel therapeutic agents that can reverse obesity and obesity-related metabolic disorders are necessary. Here, we aimed to identify new anti-obesity agents using a phenotype-based approach. We performed image-based high-content screening with a fluorogenic bioprobe (SF44), which visualizes cellular lipid droplets (LDs), to identify initial hit compounds. A structure-activity relationship study led us to yield a bioactive compound SB1501, which reduces cellular LDs in 3T3-L1 adipocytes without cytotoxicity. SB1501 induced the expression of gene products that regulate mitochondrial biogenesis and fatty acid oxidation in 3T3-L1 adipocytes. Daily treatment with SB1501 improved the metabolic states of db/db mice by reducing body fat mass, adipose tissue mass, food intake, and increasing glucose tolerance. The anti-obesity effect of SB1501 may result from perturbation of the PGC-1α-UCP1 regulatory axis in inguinal white adipose tissue and brown adipose tissue. These data suggest the therapeutic potential of SB1501 as an anti-obesity agent via modulating mitochondrial activities.
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Affiliation(s)
- Ala Jo
- CRI Center for Chemical Proteomics, Department of Chemistry, Seoul National University, Seoul, 08826, Korea
| | - Mingi Kim
- CRI Center for Chemical Proteomics, Department of Chemistry, Seoul National University, Seoul, 08826, Korea
| | - Jong In Kim
- CRI Center for Adipocyte Structure-Function, School of Biological Sciences, Seoul National University, Seoul, 08826, Korea
| | - Jaeyoung Ha
- Department of Biophysics and Chemical Biology, Seoul National University, Seoul, 08826, Korea
| | - Yoon Soo Hwang
- CRI Center for Chemical Proteomics, Department of Chemistry, Seoul National University, Seoul, 08826, Korea
| | - Hyunsung Nam
- CRI Center for Chemical Proteomics, Department of Chemistry, Seoul National University, Seoul, 08826, Korea
| | - Injae Hwang
- CRI Center for Adipocyte Structure-Function, School of Biological Sciences, Seoul National University, Seoul, 08826, Korea
| | - Jae Bum Kim
- CRI Center for Adipocyte Structure-Function, School of Biological Sciences, Seoul National University, Seoul, 08826, Korea
| | - Seung Bum Park
- CRI Center for Chemical Proteomics, Department of Chemistry, Seoul National University, Seoul, 08826, Korea.,Department of Biophysics and Chemical Biology, Seoul National University, Seoul, 08826, Korea
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21
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Evolution of the Human Diet and Its Impact on Gut Microbiota, Immune Responses, and Brain Health. Nutrients 2021; 13:nu13010196. [PMID: 33435203 PMCID: PMC7826636 DOI: 10.3390/nu13010196] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Revised: 12/30/2020] [Accepted: 01/07/2021] [Indexed: 12/18/2022] Open
Abstract
The relatively rapid shift from consuming preagricultural wild foods for thousands of years, to consuming postindustrial semi-processed and ultra-processed foods endemic of the Western world less than 200 years ago did not allow for evolutionary adaptation of the commensal microbial species that inhabit the human gastrointestinal (GI) tract, and this has significantly impacted gut health. The human gut microbiota, the diverse and dynamic population of microbes, has been demonstrated to have extensive and important interactions with the digestive, immune, and nervous systems. Western diet-induced dysbiosis of the gut microbiota has been shown to negatively impact human digestive physiology, to have pathogenic effects on the immune system, and, in turn, cause exaggerated neuroinflammation. Given the tremendous amount of evidence linking neuroinflammation with neural dysfunction, it is no surprise that the Western diet has been implicated in the development of many diseases and disorders of the brain, including memory impairments, neurodegenerative disorders, and depression. In this review, we discuss each of these concepts to understand how what we eat can lead to cognitive and psychiatric diseases.
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22
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Pang MD, Goossens GH, Blaak EE. The Impact of Artificial Sweeteners on Body Weight Control and Glucose Homeostasis. Front Nutr 2021; 7:598340. [PMID: 33490098 PMCID: PMC7817779 DOI: 10.3389/fnut.2020.598340] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2020] [Accepted: 12/03/2020] [Indexed: 12/12/2022] Open
Abstract
A poor diet is one of the leading causes for non-communicable diseases. Due to the increasing prevalence of overweight and obesity, there is a strong focus on dietary overconsumption and energy restriction. Many strategies focus on improving energy balance to achieve successful weight loss. One of the strategies to lower energy intake is refraining from sugars and replacing them with artificial sweeteners, which maintain the palatability without ingesting calories. Nevertheless, the safety and health benefits of artificial sweeteners consumption remain a topic of debate within the scientific community and society at large. Notably, artificial sweeteners are metabolized differently from each other due to their different properties. Therefore, the difference in metabolic fate of artificial sweeteners may underlie conflicting findings that have been reported related to their effects on body weight control, glucose homeostasis, and underlying biological mechanisms. Thus, extrapolation of the metabolic effects of a single artificial sweetener to all artificial sweeteners is not appropriate. Although many rodent studies have assessed the metabolic effects of artificial sweeteners, long-term studies in humans are scarce. The majority of clinical studies performed thus far report no significant effects or beneficial effects of artificial sweeteners on body weight and glycemic control, but it should be emphasized that the study duration of most studies was limited. Clearly, further well-controlled, long-term human studies investigating the effects of different artificial sweeteners and their impact on gut microbiota, body weight regulation and glucose homeostasis, as well as the underlying mechanisms, are warranted.
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Affiliation(s)
- Michelle D Pang
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, Netherlands
| | - Gijs H Goossens
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, Netherlands
| | - Ellen E Blaak
- Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, Netherlands
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23
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Gómez-Apo E, Mondragón-Maya A, Ferrari-Díaz M, Silva-Pereyra J. Structural Brain Changes Associated with Overweight and Obesity. J Obes 2021; 2021:6613385. [PMID: 34327017 PMCID: PMC8302366 DOI: 10.1155/2021/6613385] [Citation(s) in RCA: 36] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2020] [Revised: 05/14/2021] [Accepted: 07/09/2021] [Indexed: 12/17/2022] Open
Abstract
Obesity is a global health problem with a broad set of comorbidities, such as malnutrition, metabolic syndrome, diabetes, systemic hypertension, heart failure, and kidney failure. This review describes recent findings of neuroimaging and two studies of cell density regarding the roles of overnutrition-induced hypothalamic inflammation in neurodegeneration. These studies provided consistent evidence of smaller cortical thickness or reduction in the gray matter volume in people with overweight and obesity; however, the investigated brain regions varied across the studies. In general, bilateral frontal and temporal areas, basal nuclei, and cerebellum are more commonly involved. Mechanisms of volume reduction are unknown, and neuroinflammation caused by obesity is likely to induce neuronal loss. Adipocytes, macrophages of the adipose tissue, and gut dysbiosis in overweight and obese individuals result in the secretion of the cytokines and chemokines that cross the blood-brain barrier and may stimulate microglia, which in turn also release proinflammatory cytokines. This leads to chronic low-grade neuroinflammation and may be an important factor for apoptotic signaling and neuronal death. Additionally, significant microangiopathy observed in rat models may be another important mechanism of induction of apoptosis. Neuroinflammation in neurodegenerative diseases (such as Alzheimer's and Parkinson's diseases) may be similar to that in metabolic diseases induced by malnutrition. Poor cognitive performance, mainly in executive functions, in individuals with obesity is also discussed. This review highlights the neuroinflammatory and neurodegenerative mechanisms linked to obesity and emphasizes the importance of developing effective prevention and treatment intervention strategies for overweight and obese individuals.
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Affiliation(s)
- Erick Gómez-Apo
- Servicio de Anatomía Patológica, Hospital General de México “Dr. Eduardo Liceaga”, Ciudad de México, Mexico
| | - Alejandra Mondragón-Maya
- Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Mexico
| | - Martina Ferrari-Díaz
- Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Mexico
| | - Juan Silva-Pereyra
- Facultad de Estudios Superiores Iztacala, Universidad Nacional Autónoma de México, Tlalnepantla, Mexico
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24
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O'Connor D, Pang M, Castelnuovo G, Finlayson G, Blaak E, Gibbons C, Navas-Carretero S, Almiron-Roig E, Harrold J, Raben A, Martinez JA. A rational review on the effects of sweeteners and sweetness enhancers on appetite, food reward and metabolic/adiposity outcomes in adults. Food Funct 2020; 12:442-465. [PMID: 33325948 DOI: 10.1039/d0fo02424d] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Numerous strategies have been investigated to overcome the excessive weight gain that accompanies a chronic positive energy balance. Most approaches focus on a reduction of energy intake and the improvement of lifestyle habits. The use of high intensity artificial sweeteners, also known as non-caloric sweeteners (NCS), as sugar substitutes in foods and beverages, is rapidly developing. NCS are commonly defined as molecules with a sweetness profile of 30 times higher or more that of sucrose, scarcely contributing to the individual's net energy intake as they are hardly metabolized. The purpose of this review is first, to assess the impact of NCS on eating behaviour, including subjective appetite, food intake, food reward and sensory stimulation; and secondly, to assess the metabolic impact of NCS on body weight regulation, glucose homeostasis and gut health. The evidence reviewed suggests that while some sweeteners have the potential to increase subjective appetite, these effects do not translate in changes in food intake. This is supported by a large body of empirical evidence advocating that the use of NCS facilitates weight management when used alongside other weight management strategies. On the other hand, although NCS are very unlikely to impair insulin metabolism and glycaemic control, some studies suggest that NCS could have putatively undesirable effects, through various indirect mechanisms, on body weight, glycemia, adipogenesis and the gut microbiota; however there is insufficient evidence to determine the degree of such effects. Overall, the available data suggests that NCS can be used to facilitate a reduction in dietary energy content without significant negative effects on food intake behaviour or body metabolism, which would support their potential role in the prevention of obesity as a complementary strategy to other weight management approaches. More research is needed to determine the impact of NCS on metabolic health, in particular gut microbiota.
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Affiliation(s)
- Dominic O'Connor
- Biopsychology Group, Institute of Psychological Sciences, University of Leeds, Leeds, UK
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25
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Flack KD, Hays HM, Moreland J. The consequences of exercise-induced weight loss on food reinforcement. A randomized controlled trial. PLoS One 2020; 15:e0234692. [PMID: 32555624 PMCID: PMC7302707 DOI: 10.1371/journal.pone.0234692] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2020] [Accepted: 05/29/2020] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Obesity remains a primary threat to the health of most Americans, with over 66% considered overweight or obese with a body mass index (BMI) of 25 kg/m2 or greater. A common treatment option many believe to be effective, and therefore turn to, is exercise. However, the amount of weight loss from exercise training is often disappointingly less than expected with greater amounts of exercise not always promoting greater weight loss. Increases in energy intake have been prescribed as the primary reason for this lack of weight loss success with exercise. Research has mostly focused on alterations in hormonal mediators of appetite (e.g.: ghrelin, peptide YY, GLP-1, pancreatic polypeptide, and leptin) that may increase hunger and/or reduce satiety to promote greater energy intake with exercise training. A less understood mechanism that may be working to increase energy intake with exercise is reward-driven feeding, a strong predictor of energy intake and weight status but rarely analyzed in the context of exercise. DESIGN Sedentary men and women (BMI: 25-35 kg/m2, N = 52) were randomized into parallel aerobic exercise training groups partaking in either two or six exercise sessions/week, or sedentary control for 12 weeks. METHODS The reinforcing value of food was measured by an operant responding progressive ratio schedule task (the behavioral choice task) to determine how much work participants were willing to perform for access to a healthy food option relative to a less healthy food option before and after the exercise intervention. Body composition and resting energy expenditure were assessed via DXA and indirect calorimetry, respectively, at baseline and post testing. RESULTS Changes in fat-free mass predicted the change in total amount of operant responding for food (healthy and unhealthy). There were no correlations between changes in the reinforcing value of one type of food (healthy vs unhealthy) to changes in body composition. CONCLUSION In support of previous work, reductions in fat-free mass resulting from an aerobic exercise intervention aimed at weight loss plays an important role in energy balance regulation by increasing operant responding for food.
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Affiliation(s)
- Kyle D. Flack
- Department of Dietetics and Human Nutrition, University of Kentucky, Lexington, Kentucky, United States of America
| | - Harry M. Hays
- Department of Dietetics and Human Nutrition, University of Kentucky, Lexington, Kentucky, United States of America
| | - Jack Moreland
- Department of Dietetics and Human Nutrition, University of Kentucky, Lexington, Kentucky, United States of America
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Kumar U, Singh S. Role of Somatostatin in the Regulation of Central and Peripheral Factors of Satiety and Obesity. Int J Mol Sci 2020; 21:ijms21072568. [PMID: 32272767 PMCID: PMC7177963 DOI: 10.3390/ijms21072568] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2020] [Revised: 03/29/2020] [Accepted: 04/02/2020] [Indexed: 02/06/2023] Open
Abstract
Obesity is one of the major social and health problems globally and often associated with various other pathological conditions. In addition to unregulated eating behaviour, circulating peptide-mediated hormonal secretion and signaling pathways play a critical role in food intake induced obesity. Amongst the many peptides involved in the regulation of food-seeking behaviour, somatostatin (SST) is the one which plays a determinant role in the complex process of appetite. SST is involved in the regulation of release and secretion of other peptides, neuronal integrity, and hormonal regulation. Based on past and recent studies, SST might serve as a bridge between central and peripheral tissues with a significant impact on obesity-associated with food intake behaviour and energy expenditure. Here, we present a comprehensive review describing the role of SST in the modulation of multiple central and peripheral signaling molecules. In addition, we highlight recent progress and contribution of SST and its receptors in food-seeking behaviour, obesity (orexigenic), and satiety (anorexigenic) associated pathways and mechanism.
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Sousa GMD, Cazarin CBB, Maróstica Junior MR, Lamas CDA, Quitete VHAC, Pastore GM, Bicas JL. The effect of α-terpineol enantiomers on biomarkers of rats fed a high-fat diet. Heliyon 2020; 6:e03752. [PMID: 32382672 PMCID: PMC7199010 DOI: 10.1016/j.heliyon.2020.e03752] [Citation(s) in RCA: 20] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 02/28/2020] [Accepted: 04/02/2020] [Indexed: 12/13/2022] Open
Abstract
Alpha-terpineol is a monoterpenoid found in many essential oils, being widely used in food and household products. In vitro antioxidant and anti-inflammatory activities have already been associated with this alcohol; therefore, this study aimed to check if these properties were also present in vivo, counteracting the oxidant and inflammatory effects of a high-fat diet, as well as if there were differences in the biological activities among the two α-terpineol enantiomers. Thus, this work evaluated the effect of supplementation of α-terpineol enantiomers (at 25, 50 and 100 mg/kg of diet) on biological parameters of diet-induced obese Sprague-Dawley rats. In general, α-terpineol improved the nutritional parameters of rats fed a high-fat diet. The intake of α-terpineol at concentrations ≥50 mg/kg was able to reestablish the insulin sensibility and reduced (p < 0.05) serum levels of pro-inflammatory cytokines TNF-α and IL-1β, when compared with the control group. The intake of R-(+)- and (-)-α-terpineol decreased the TNF-α level by approximately 1.5 and 3.4 times, respectively, when compared with the high-fat group, regardless of the concentration. Moreover, both enantiomers at 50 mg/kg decreased the levels of serum thiobarbituric acid reactive substances (TBARS) by 2.6-4.2 times, while hepatic TBARS were reduced in approximately 1.6 times, regardless of the compound and concentration tested. Further experiments are suggested to confirm the mechanisms and the security of α-terpineol in different experimental models and more extended exposure experiments.
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Affiliation(s)
- Gardênia Martins de Sousa
- Department of Food Science, School of Food Engineering, University of Campinas, Rua Monteiro Lobato, 80, CEP 13083-862, Campinas, SP, Brazil
| | - Cinthia Baú Betim Cazarin
- Department of Food and Nutrition, School of Food Engineering, University of Campinas, Rua Monteiro Lobato, 80, CEP 13083-862, Campinas, SP, Brazil
| | - Mário Roberto Maróstica Junior
- Department of Food and Nutrition, School of Food Engineering, University of Campinas, Rua Monteiro Lobato, 80, CEP 13083-862, Campinas, SP, Brazil
| | - Celina de Almeida Lamas
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas, Rua Monteiro Lobato, 255, CEP 13083-862, Campinas, SP, Brazil
| | - Valéria Helena Alves Cagnon Quitete
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas, Rua Monteiro Lobato, 255, CEP 13083-862, Campinas, SP, Brazil
| | - Glaucia Maria Pastore
- Department of Food Science, School of Food Engineering, University of Campinas, Rua Monteiro Lobato, 80, CEP 13083-862, Campinas, SP, Brazil
| | - Juliano Lemos Bicas
- Department of Food Science, School of Food Engineering, University of Campinas, Rua Monteiro Lobato, 80, CEP 13083-862, Campinas, SP, Brazil
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Nakamura C, Ishii A, Matsuo T, Ishida R, Yamaguchi T, Takada K, Uji M, Yoshikawa T. Neural effects of acute stress on appetite: A magnetoencephalography study. PLoS One 2020; 15:e0228039. [PMID: 31968008 PMCID: PMC6975544 DOI: 10.1371/journal.pone.0228039] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2019] [Accepted: 01/06/2020] [Indexed: 11/30/2022] Open
Abstract
Stress is prevalent in modern society and can affect human health through its effects on appetite. Therefore, in the present study, we aimed to clarify the neural mechanisms by which acute stress affects appetite in healthy, non-obese males during fasting. In total, 22 volunteers participated in two experiments (stress and control conditions) on different days. The participants performed a stress-inducing speech-and-mental-arithmetic task under both conditions, and then viewed images of food, during which, their neural activity was recorded using magnetoencephalography (MEG). In the stress condition, the participants were told to perform the speech-and-mental-arithmetic task again subsequently to viewing the food images; however, another speech-and-mental-arithmetic task was not performed actually. Subjective levels of stress and appetite were then assessed using a visual analog scale. Electrocardiography was performed to assess the index of heart rate variability reflecting sympathetic nerve activity. The findings showed that subjective levels of stress and sympathetic nerve activity were increased in the MEG session in the stress condition, whereas appetite gradually increased in the MEG session only in the control condition. The decrease in alpha band power in the frontal pole caused by viewing the food images was greater in the stress condition than in the control condition. These findings suggest that acute stress can suppress the increase of appetite, and this suppression is associated with the frontal pole. The results of the present study may provide valuable clues to gain a further understanding of the neural mechanisms by which acute stress affects appetite. However, since the stress examined in the present study was related to the expectation of forthcoming stressful event, our present findings may not be generalized to the stress unrelated to the expectation of forthcoming stressful event.
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Affiliation(s)
- Chika Nakamura
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, Abeno-ku, Osaka, Japan
| | - Akira Ishii
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, Abeno-ku, Osaka, Japan
- * E-mail:
| | - Takashi Matsuo
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, Abeno-ku, Osaka, Japan
| | - Rika Ishida
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, Abeno-ku, Osaka, Japan
| | - Takahiro Yamaguchi
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, Abeno-ku, Osaka, Japan
| | - Katsuko Takada
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, Abeno-ku, Osaka, Japan
| | - Masato Uji
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, Abeno-ku, Osaka, Japan
| | - Takahiro Yoshikawa
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, Abeno-ku, Osaka, Japan
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29
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Jain AK, le Roux CW, Puri P, Tavakkoli A, Gletsu-Miller N, Laferrère B, Kellermayer R, DiBaise JK, Martindale RG, Wolfe BM. Proceedings of the 2017 ASPEN Research Workshop-Gastric Bypass: Role of the Gut. JPEN J Parenter Enteral Nutr 2019; 42:279-295. [PMID: 29443403 DOI: 10.1002/jpen.1121] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2017] [Accepted: 11/16/2017] [Indexed: 12/11/2022]
Abstract
The goal of the National Institutes of Health-funded American Society for Parenteral and Enteral Nutrition 2017 research workshop (RW) "Gastric Bypass: Role of the Gut" was to focus on the exciting research evaluating gut-derived signals in modulating outcomes after bariatric surgery. Although gastric bypass surgery has undoubted positive effects, the mechanistic basis of improved outcomes cannot be solely explained by caloric restriction. Emerging data suggest that bile acid metabolic pathways, luminal contents, energy balance, gut mucosal integrity, as well as the gut microbiota are significantly modulated after bariatric surgery and may be responsible for the variable outcomes, each of which was rigorously evaluated. The RW served as a timely and novel academic meeting that brought together clinicians and researchers across the scientific spectrum, fostering a unique venue for interdisciplinary collaboration among investigators. It promoted engaging discussion and evolution of new research hypotheses and ideas, driving the development of novel ameliorative, therapeutic, and nonsurgical interventions targeting obesity and its comorbidities. Importantly, a critical evaluation of the current knowledge regarding gut-modulated signaling after bariatric surgery, potential pitfalls, and lacunae were thoroughly addressed.
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Affiliation(s)
- Ajay Kumar Jain
- Department of Pediatrics, SSM Cardinal Glennon Children's Medical Center, Saint Louis University School of Medicine, Saint Louis, Missouri, USA
| | - Carel W le Roux
- Diabetes Complications Research Center, University College Dublin, School of Medicine, Dublin, Ireland
| | - Puneet Puri
- Division of Gastroenterology, Hepatology and Nutrition, Virginia Commonwealth University, Richmond, Vieginia, USA
| | - Ali Tavakkoli
- Brigham and Women's Hospital, Center for Weight Management and Metabolic Surgery, Harvard Medical School, Boston, Massachusetts, USA
| | | | - Blandine Laferrère
- Department of Medicine, Division of Endocrinology, Columbia University, New York, New York, USA
| | | | - John K DiBaise
- Division of Gastroenterology and Hepatology, Mayo Clinic, Phoenix, Arizona, USA
| | | | - Bruce M Wolfe
- Oregon Health and Science University, Portland, Oregon, USA
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Morales Camacho WJ, Molina Díaz JM, Plata Ortiz S, Plata Ortiz JE, Morales Camacho MA, Calderón BP. Childhood obesity: Aetiology, comorbidities, and treatment. Diabetes Metab Res Rev 2019; 35:e3203. [PMID: 31299135 DOI: 10.1002/dmrr.3203] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 07/04/2019] [Accepted: 07/06/2019] [Indexed: 12/24/2022]
Abstract
Obesity is currently considered a global epidemic, and its implications in mortality and morbidity in a paediatric patient and in adulthood are increasingly important. The objective of this article is to review in detail the definition of obesity according to age group, and, in turn, the epidemiology of this entity worldwide and in South America. Available evidence about pathophysiology and, additionally, associated comorbidities are reported in some of the most important and clinically relevant body systems. The recommendations on pharmacological and nonpharmacological management through changes in lifestyle and relevant aspects of bariatric surgery in the paediatric population are also described.
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Affiliation(s)
- William Javier Morales Camacho
- Pediatrics, El Bosque University (UEB), Bogotá D.C., Colombia
- Investigation Group of Pediatrics, El Bosque University (UEB), Bogotá D.C., Colombia
| | - Jorge Mario Molina Díaz
- Department of Child Endocrinology, Federico Gómez Children's Hospital of Mexico (HIMFG), Mexico City, Mexico
- Faculty of Medicine, Autonomous University of Mexico (UNAM), Mexico City, Mexico
| | - Sandra Plata Ortiz
- Faculty of Medicine, University of Santander (UDES), Bucaramanga, Colombia
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31
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Gastrointestinal Sensing of Meal-Related Signals in Humans, and Dysregulations in Eating-Related Disorders. Nutrients 2019; 11:nu11061298. [PMID: 31181734 PMCID: PMC6627312 DOI: 10.3390/nu11061298] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2019] [Revised: 05/29/2019] [Accepted: 06/05/2019] [Indexed: 12/13/2022] Open
Abstract
The upper gastrointestinal (GI) tract plays a critical role in sensing the arrival of a meal, including its volume as well as nutrient and non-nutrient contents. The presence of the meal in the stomach generates a mechanical distension signal, and, as gastric emptying progresses, nutrients increasingly interact with receptors on enteroendocrine cells, triggering the release of gut hormones, with lipid and protein being particularly potent. Collectively, these signals are transmitted to the brain to regulate appetite and energy intake, or in a feedback loop relayed back to the upper GI tract to further adjust GI functions, including gastric emptying. The research in this area to date has provided important insights into how sensing of intraluminal meal-related stimuli acutely regulates appetite and energy intake in humans. However, disturbances in the detection of these stimuli have been described in a number of eating-related disorders. This paper will review the GI sensing of meal-related stimuli and the relationship with appetite and energy intake, and examine changes in GI responses to luminal stimuli in obesity, functional dyspepsia and anorexia of ageing, as examples of eating-related disorders. A much better understanding of the mechanisms underlying these dysregulations is still required to assist in the development of effective management and treatment strategies in the future.
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32
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Almyah MK, Al-Badran AI. Genetic susceptibility of Iraqis for obesity and type 2 diabetes: LEPR gene polymorphisms. GENE REPORTS 2019. [DOI: 10.1016/j.genrep.2019.100386] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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33
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Sahebkar-Khorasani M, Jarahi L, Cramer H, Safarian M, Naghedi-Baghdar H, Salari R, Behravanrad P, Azizi H. Herbal medicines for suppressing appetite: A systematic review of randomized clinical trials. Complement Ther Med 2019; 44:242-252. [PMID: 31126562 DOI: 10.1016/j.ctim.2019.04.019] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2019] [Revised: 04/13/2019] [Accepted: 04/23/2019] [Indexed: 01/04/2023] Open
Abstract
The suppression of appetite with herbal medicines has become very popular in recent years. We conducted this systematic review to evaluate the recent scientific evidence regarding herbal medicines that are used to suppress appetite. We retrieved clinical trials from PubMed, Cochrane Central Register of Controlled Trials, Web of Science, Scientific Information Database, and IranMedex from January 1, 2013 to April 24, 2018. English and Persian language randomized clinical trials that used herbal medicines to suppress appetite in healthy or obese or overweight individuals were included. Risk of bias was assessed using Cochrane methodology. Out of 591 articles, 22 trials with 973 participants were included. One study on the Meratrim formulation which contained the Sphaeranthus indicus flower heads extract and Garcinia mangostana fruit, revealed longer-term evidence; while 6 studies on Ilex paraguariensis, Spinacia oleracea, Phaseolus vulgaris, Secale cereale, Sorghum bicolor and Plantago showed short-term evidence for suppressing appetite. No serious adverse events were reported. Despite some methodological concerns in the included studies, there is promising evidence for suppressing appetite with herbal medicines that needs to be confirmed in long-term clinical trials with adequate sample size and higher methodological quality with more attention to safety, effective dose and side effects.
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Affiliation(s)
| | - Lida Jarahi
- Department of Community Medicine, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Holger Cramer
- Department of Internal and Integrative Medicine, Kliniken Essen-Mitte, Faculty of Medicine, University of Duisburg-Essen, Essen, Germany
| | - Mohammad Safarian
- Metabolic Syndrome Research Center, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran; Department of Nutrition, School of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Hamideh Naghedi-Baghdar
- School of Persian and Complementary Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Roshanak Salari
- Department of Pharmaceutical Sciences in Persian Medicine, School of Persian and Complementary Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Pardis Behravanrad
- Student of Veterinary Medicine, Islamic Azad University, Science and Research Branch, Tehran, Iran
| | - Hoda Azizi
- Department of Chinese and Complementary Medicine, School of Persian and Complementary Medicine, Mashhad University of Medical Sciences, Mashhad, Iran.
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Yao G, Wu S, Zeng X, Zhao H, Wang G, Chen M, Qian N. Different gut microbiome composition in obese Guizhou minipigs between female and castrated male. Folia Microbiol (Praha) 2019; 64:889-898. [PMID: 31011890 DOI: 10.1007/s12223-019-00704-4] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2018] [Accepted: 04/01/2019] [Indexed: 11/30/2022]
Abstract
Gut microbiome lives in the intestinal tract of animals and plays an important role in almost all life processes. Gut microbiome balance is beneficial to health, and imbalance leads to many diseases, one of which is obesity epidemic. However, gut microbiome is also influenced by host hormone, and different gut microbiome composition is observed between the sexes. Here, we studied whether castrated male Guizhou minipigs with obesity own the same gut microbiome composition and microbial function predictions with those in obese females. We sequenced the hypervariable regions V3 to V4 of bacterial 16s rRNA of fecal samples collected from our study subjects. We observed that the operational taxonomic units were small, which suggested that the abundance of gut microbiome may be influenced by low genetic diversity of host. Our results also suggested that the castrated male has different gut microbial composition compared to the obese female. An increasing Firmicutes/Bacteroidetes ratio was observed in both castrated male and obese female groups, which suggested that the main adipogenic gut microorganism in obese Guizhou minipigs in our studies is the same with that in other obese mammals. However, we also observed that there were function prediction differences of obese Guizhou minipigs between female and castrated male, which suggested that the influence of gut microbiome on obesity between them is different.
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Affiliation(s)
- Gang Yao
- Institute of Laboratory Animal Science, Guizhou University of Traditional Chinese Medicine, Huaxi University Town, Guiyang, Guizhou, People's Republic of China
| | - Shuguang Wu
- Institute of Laboratory Animal Science, Guizhou University of Traditional Chinese Medicine, Huaxi University Town, Guiyang, Guizhou, People's Republic of China.
| | - Xianchun Zeng
- Guizhou Provincial People's Hospital, Guiyang, Guizhou, People's Republic of China
| | - Hai Zhao
- Institute of Laboratory Animal Science, Guizhou University of Traditional Chinese Medicine, Huaxi University Town, Guiyang, Guizhou, People's Republic of China
| | - Guoqi Wang
- Institute of Laboratory Animal Science, Guizhou University of Traditional Chinese Medicine, Huaxi University Town, Guiyang, Guizhou, People's Republic of China
| | - Mingfei Chen
- Institute of Laboratory Animal Science, Guizhou University of Traditional Chinese Medicine, Huaxi University Town, Guiyang, Guizhou, People's Republic of China
| | - Ning Qian
- Institute of Laboratory Animal Science, Guizhou University of Traditional Chinese Medicine, Huaxi University Town, Guiyang, Guizhou, People's Republic of China
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35
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A neural basis for food foraging in obesity. Behav Brain Sci 2019; 42:e37. [PMID: 30940250 DOI: 10.1017/s0140525x18001905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Poverty-related food insecurity can be viewed as a form of economic and nutritional uncertainty that can lead, in some situations, to a desire for more filling and satisfying food. Given the current obesogenic food environment and the nature of the food supply, those food choices could engage a combination of sensory, neurophysiological, and genetic factors as potential determinants of obesity.
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36
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37
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Percik R, Cina J, Even B, Gitler A, Geva D, Seluk L, Livny A. A pilot study of a novel therapeutic approach to obesity: CNS modification by N.I.R. H.E.G. neurofeedback. Clin Nutr 2019; 38:258-263. [DOI: 10.1016/j.clnu.2018.01.023] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2017] [Revised: 01/09/2018] [Accepted: 01/22/2018] [Indexed: 10/18/2022]
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38
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Pucci A, Batterham RL. Mechanisms underlying the weight loss effects of RYGB and SG: similar, yet different. J Endocrinol Invest 2019; 42:117-128. [PMID: 29730732 PMCID: PMC6394763 DOI: 10.1007/s40618-018-0892-2] [Citation(s) in RCA: 121] [Impact Index Per Article: 24.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 04/17/2018] [Indexed: 12/12/2022]
Abstract
The worldwide obesity epidemic continues unabated, adversely impacting upon global health and economies. People with severe obesity suffer the greatest adverse health consequences with reduced life expectancy. Currently, bariatric surgery is the most effective treatment for people with severe obesity, resulting in marked sustained weight loss, improved obesity-associated comorbidities and reduced mortality. Sleeve gastrectomy (SG) and Roux-en-Y gastric bypass (RYGB), the most common bariatric procedures undertaken globally, engender weight loss and metabolic improvements by mechanisms other than restriction and malabsorption. It is now clear that a plethora of gastrointestinal (GI) tract-derived signals plays a critical role in energy and glucose regulation. SG and RYGB, which alter GI anatomy and nutrient flow, impact upon these GI signals ultimately leading to weight loss and metabolic improvements. However, whilst highly effective overall, at individual level, post-operative outcomes are highly variable, with a proportion of patients experiencing poor long-term weight loss outcome and gaining little health benefit. RYGB and SG are markedly different anatomically and thus differentially impact upon GI signalling and bodyweight regulation. Here, we review the mechanisms proposed to cause weight loss following RYGB and SG. We highlight similarities and differences between these two procedures with a focus on gut hormones, bile acids and gut microbiota. A greater understanding of these procedure-related mechanisms will allow surgical procedure choice to be tailored to the individual to maximise post-surgery health outcomes and will facilitate the discovery of non-surgical treatments for people with obesity.
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Affiliation(s)
- A Pucci
- Centre for Obesity Research, Rayne Institute, University College London, London, UK
- Centre for Weight Management and Metabolic Surgery, University College London Hospital Bariatric, London, UK
| | - R L Batterham
- Centre for Obesity Research, Rayne Institute, University College London, London, UK.
- Centre for Weight Management and Metabolic Surgery, University College London Hospital Bariatric, London, UK.
- National Institute of Health Research, University College London Hospital Biomedical Research Centre, London, UK.
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Cani PD, Van Hul M, Lefort C, Depommier C, Rastelli M, Everard A. Microbial regulation of organismal energy homeostasis. Nat Metab 2019; 1:34-46. [PMID: 32694818 DOI: 10.1038/s42255-018-0017-4] [Citation(s) in RCA: 295] [Impact Index Per Article: 59.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2018] [Accepted: 11/15/2018] [Indexed: 12/13/2022]
Abstract
The gut microbiome has emerged as a key regulator of host metabolism. Here we review the various mechanisms through which the gut microbiome influences the energy metabolism of its host, highlighting the complex interactions between gut microbes, their metabolites and host cells. Among the most important bacterial metabolites are short-chain fatty acids, which serve as a direct energy source for host cells, stimulate the production of gut hormones and act in the brain to regulate food intake. Other microbial metabolites affect systemic energy expenditure by influencing thermogenesis and adipose tissue browning. Both direct and indirect mechanisms of action are known for specific metabolites, such as bile acids, branched chain amino acids, indole propionic acid and endocannabinoids. We also discuss the roles of specific bacteria in the production of specific metabolites and explore how external factors, such as antibiotics and exercise, affect the microbiome and thereby energy homeostasis. Collectively, we present a large body of evidence supporting the concept that gut microbiota-based therapies can be used to modulate host metabolism, and we expect to see such approaches moving from bench to bedside in the near future.
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Affiliation(s)
- Patrice D Cani
- Metabolism and Nutrition Research Group, WELBIO-Walloon Excellence in Life Sciences and BIOtechnology, Louvain Drug Research Institute, UCLouvain, Université catholique de Louvain, Brussels, Belgium.
| | - Matthias Van Hul
- Metabolism and Nutrition Research Group, WELBIO-Walloon Excellence in Life Sciences and BIOtechnology, Louvain Drug Research Institute, UCLouvain, Université catholique de Louvain, Brussels, Belgium
| | - Charlotte Lefort
- Metabolism and Nutrition Research Group, WELBIO-Walloon Excellence in Life Sciences and BIOtechnology, Louvain Drug Research Institute, UCLouvain, Université catholique de Louvain, Brussels, Belgium
| | - Clara Depommier
- Metabolism and Nutrition Research Group, WELBIO-Walloon Excellence in Life Sciences and BIOtechnology, Louvain Drug Research Institute, UCLouvain, Université catholique de Louvain, Brussels, Belgium
| | - Marialetizia Rastelli
- Metabolism and Nutrition Research Group, WELBIO-Walloon Excellence in Life Sciences and BIOtechnology, Louvain Drug Research Institute, UCLouvain, Université catholique de Louvain, Brussels, Belgium
| | - Amandine Everard
- Metabolism and Nutrition Research Group, WELBIO-Walloon Excellence in Life Sciences and BIOtechnology, Louvain Drug Research Institute, UCLouvain, Université catholique de Louvain, Brussels, Belgium
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Al-Najim W, Docherty NG, le Roux CW. Food Intake and Eating Behavior After Bariatric Surgery. Physiol Rev 2018; 98:1113-1141. [PMID: 29717927 DOI: 10.1152/physrev.00021.2017] [Citation(s) in RCA: 106] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Obesity is an escalating global chronic disease. Bariatric surgery is a very efficacious treatment for obesity and its comorbidities. Alterations to gastrointestinal anatomy during bariatric surgery result in neurological and physiological changes affecting hypothalamic signaling, gut hormones, bile acids, and gut microbiota, which coalesce to exert a profound influence on eating behavior. A thorough understanding of the mechanisms underlying eating behavior is essential in the management of patients after bariatric surgery. Studies investigating candidate mechanisms have expanded dramatically in the last decade. Herein we review the proposed mechanisms governing changes in eating behavior, food intake, and body weight after bariatric surgery. Additive or synergistic effects of both conditioned and unconditioned factors likely account for the complete picture of changes in eating behavior. Considered application of strategies designed to support the underlying principles governing changes in eating behavior holds promise as a means of optimizing responses to surgery and long-term outcomes.
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Affiliation(s)
- Werd Al-Najim
- Diabetes Complications Research Centre, Conway Institute, School of Medicine and Medical Sciences, University College Dublin , Dublin , Ireland ; Department of Gastrosurgical Research and Education, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg , Gothenburg , Sweden ; and Investigative Science, Imperial College London , London , United Kingdom
| | - Neil G Docherty
- Diabetes Complications Research Centre, Conway Institute, School of Medicine and Medical Sciences, University College Dublin , Dublin , Ireland ; Department of Gastrosurgical Research and Education, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg , Gothenburg , Sweden ; and Investigative Science, Imperial College London , London , United Kingdom
| | - Carel W le Roux
- Diabetes Complications Research Centre, Conway Institute, School of Medicine and Medical Sciences, University College Dublin , Dublin , Ireland ; Department of Gastrosurgical Research and Education, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg , Gothenburg , Sweden ; and Investigative Science, Imperial College London , London , United Kingdom
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Subjective Satiety Following Meals Incorporating Rice, Pasta and Potato. Nutrients 2018; 10:nu10111739. [PMID: 30424537 PMCID: PMC6267283 DOI: 10.3390/nu10111739] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2018] [Revised: 10/31/2018] [Accepted: 11/09/2018] [Indexed: 01/06/2023] Open
Abstract
The satiating capacity of carbohydrate staples eaten alone is dependent upon the energy density of the food but relative satiety when starchy staples are incorporated into mixed meals is uncertain. Our aim was to assess the satiating effects of three carbohydrate staples; jasmine rice, penne pasta, and Agria potato, each consumed within a standard mixed meal. Cooked portions of each staple containing 45 g carbohydrate were combined with 200 g of meat sauce and 200 g of mixed vegetables in three mixed meals. The quantities of staple providing 45 g carbohydrate were: Rice, 142 g; pasta, 138 g and potato 337 g. Participants (n = 14) consumed each of the mixed meals in random order on separate days. Satiety was assessed with using visual analogue scales at baseline and for 3 h post meal. In an area-under-the-curve comparison, participants felt less hungry (mean (SD)) following potato 263 (230) than following rice 374 (237) or pasta 444 (254) mm∙min, and felt fuller, more satisfied, and wanted to eat less following the potato compared with the rice and pasta meals (p for all <0.01). The superior satiating effect of potato compared with rice and pasta in a mixed meal was consistent with its lower energy density.
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Contribution of obesity as an effect regulator to an association between serum leptin and incident metabolic syndrome. Clin Chim Acta 2018; 487:275-280. [PMID: 30287258 DOI: 10.1016/j.cca.2018.09.038] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2018] [Revised: 09/19/2018] [Accepted: 09/29/2018] [Indexed: 12/31/2022]
Abstract
BACKGROUND We investigated whether serum leptin can be a predictor for incident cases of MetS in a population-based study. METHODS This is a prospective cohort study of 1590 adults aged between 40 and 70 years, who did not have MetS in 2005-2008 (at baseline) and 2008-2011 (follow-up). The baseline serum leptin concentrations were measured by radioimmunoassay. RESULTS During an average of 2.8 years of follow-up, 113 men (17.1%) and 148 women (15.9%) developed MetS. In multivariable adjusted models, the odds ratio of incident MetS when comparing the lowest to the highest quartiles of leptin levels was 3.17 in men and 2.79 in women; nevertheless, the significance disappeared after adjusting for the body mass index (BMI). In subsidiary analyses by BMI, logistic regression analysis showed that subjects with the highest tertile of serum leptin level were 3.04 and 2.12 times more likely to have MetS than those with the lowest tertile in lean subjects (OR 3.04; 95% CI 1.44-6.41; p = .004 in men vs. OR 2.12; 95% CI 1.06-4.25; p = .036 in women, respectively). CONCLUSIONS Obesity is an effect regulator, which can predict an association between increased serum leptin level and the incidence of MetS in lean subjects.
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Bliss ES, Whiteside E. The Gut-Brain Axis, the Human Gut Microbiota and Their Integration in the Development of Obesity. Front Physiol 2018; 9:900. [PMID: 30050464 PMCID: PMC6052131 DOI: 10.3389/fphys.2018.00900] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2018] [Accepted: 06/21/2018] [Indexed: 12/17/2022] Open
Abstract
Obesity is a global epidemic, placing socioeconomic strain on public healthcare systems, especially within the so-called Western countries, such as Australia, United States, United Kingdom, and Canada. Obesity results from an imbalance between energy intake and energy expenditure, where energy intake exceeds expenditure. Current non-invasive treatments lack efficacy in combating obesity, suggesting that obesity is a multi-faceted and more complex disease than previously thought. This has led to an increase in research exploring energy homeostasis and the discovery of a complex bidirectional communication axis referred to as the gut-brain axis. The gut-brain axis is comprised of various neurohumoral components that allow the gut and brain to communicate with each other. Communication occurs within the axis via local, paracrine and/or endocrine mechanisms involving a variety of gut-derived peptides produced from enteroendocrine cells (EECs), including glucagon-like peptide 1 (GLP1), cholecystokinin (CCK), peptide YY3-36 (PYY), pancreatic polypeptide (PP), and oxyntomodulin. Neural networks, such as the enteric nervous system (ENS) and vagus nerve also convey information within the gut-brain axis. Emerging evidence suggests the human gut microbiota, a complex ecosystem residing in the gastrointestinal tract (GIT), may influence weight-gain through several inter-dependent pathways including energy harvesting, short-chain fatty-acids (SCFA) signalling, behaviour modifications, controlling satiety and modulating inflammatory responses within the host. Hence, the gut-brain axis, the microbiota and the link between these elements and the role each plays in either promoting or regulating energy and thereby contributing to obesity will be explored in this review.
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Affiliation(s)
- Edward S. Bliss
- School of Health and Wellbeing, University of Southern Queensland, Toowoomba, QLD, Australia
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Ghielmetti V, Wichert B, Rüegg S, Frey D, Liesegang A. Food intake and energy expenditure in growing cats with and without a predisposition to overweight. J Anim Physiol Anim Nutr (Berl) 2018; 102:1401-1410. [PMID: 29920783 DOI: 10.1111/jpn.12928] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 05/07/2018] [Accepted: 05/08/2018] [Indexed: 01/23/2023]
Abstract
Overweight and obesity are multifactorial diseases caused by an imbalance in energy metabolism. An underlying genetic predisposition is often a factor in these conditions. In the cat breeding family of the Institute of Animal Nutrition at the Vetsuisse Faculty, University of Zurich, a segregating overweight phenotype with a genetic contribution was observed. From this breeding family, 26 kittens were followed from birth up to 8 months of age. During this time, food intake was measured using an automatic feeding station, and energy expenditure was investigated using indirect calorimetry at the ages of 4 and 6 months. Dual-energy X-ray absorptiometry (DEXA) was performed and blood glucose, leptin and insulin were measured at the ages of 4, 6 and 8 months. The kittens were also weighed daily for the first 2 weeks of life, every second day until weaning and once per week until 8 months of age. The body condition score (BCS) was evaluated monthly between 2 and 8 months of age. The main finding of this study is that a predisposition to overweight is connected to a higher food intake early in life, with no significant alterations in energy expenditure. The leptin blood levels were related to body fat percentage, and insulin sensitivity did not seem to be affected.
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Affiliation(s)
- Vivien Ghielmetti
- Vetsuisse Faculty, Institute of Animal Nutrition, University of Zurich, Zurich, Switzerland
| | - Brigitta Wichert
- Vetsuisse Faculty, Institute of Animal Nutrition, University of Zurich, Zurich, Switzerland
| | - Simon Rüegg
- Vetsuisse Faculty, Section of Veterinary Epidemiology, University of Zurich, Zurich, Switzerland
| | - Diana Frey
- Department of Rheumatology, University Hospital Zurich, Zurich, Switzerland
| | - Annette Liesegang
- Vetsuisse Faculty, Institute of Animal Nutrition, University of Zurich, Zurich, Switzerland
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Park SH, Lee JR, Jang SP, Park SH, Lee HJ, Hong JW, Suh HW. Antinociceptive profiles and mechanisms of centrally administered oxyntomodulin in various mouse pain models. Neuropeptides 2018; 68:7-14. [PMID: 29366515 DOI: 10.1016/j.npep.2018.01.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/19/2017] [Revised: 01/15/2018] [Accepted: 01/15/2018] [Indexed: 11/26/2022]
Abstract
In the present study, the antinociceptive profiles of oxyntomodulin were examined in ICR mice. Oxyntomodulin administered intrathecally (i.t.) and intracerebroventricularly (i.c.v.) (from 1 to 5μg/5μl) showed an antinociceptive effect in a dose-dependent manner as measured in the acetic acid-induced writhing test. Moreover, cumulative response time of nociceptive behaviors induced by intraplantar formalin injection was reduced by i.t. or i.c.v. treatment with oxyntomodulin during the second, but not the first phase. In addition, the cumulative nociceptive response time after i.t. injection with substance P (0.7μg), glutamate (20μg), and pro-inflammatory cytokines such as TNF-α, IL-β or IFN-γ (100pg/5μl) was diminished by spinally or supraspinally administered oxyntomodulin. However, i.t. and i.c.v. treatment with oxyntomodulin did not affect latencies of the tail-flick and hot-plate paw-licking responses. Furthermore, the i.t. pretreatment with yohimbine (adrenergic receptor antagonist), but not naloxone (an opioid receptor antagonist) or methysergide (a serotonergic receptor antagonist), attenuated antinociceptive effect induced by oxyntomodulin administered i.c.v. in the writhing test. The i.c.v. or i.t. pretreatment with oxyntomodulin attenuated formalin-induced increase of phosphorlated ERK (p-ERK) expression in the spinal cord. Our results suggest that centrally administered oxyntomodulin shows an antinociceptive property in various pain models except for thermal-induced nociception. Furthermore, supraspinally administered oxyntomodulin-induced antinociception may be mediated by spinal adrenergic receptors, but not serotonergic and opioidergic receptors. Furthermore, the antinociception induced by oxyntomodulin appears to be mediated by reduced formalin-induced p-ERK expression in the spinal cord.
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Affiliation(s)
- Soo-Hyun Park
- Front bio Co., Ltd., #405 1-dong, 32 Soyanggang-ro, Chuncheon, Gangwon-do 24232, Republic of Korea
| | - Jae-Ryeong Lee
- Department of Pharmacology, Institute of Natural Medicine, College of Medicine, Hallym University, 1 Hallymdaehak-gil, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Sang-Pil Jang
- Department of Pharmacology, Institute of Natural Medicine, College of Medicine, Hallym University, 1 Hallymdaehak-gil, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Seyung-Hwan Park
- Department of Pharmacology, Institute of Natural Medicine, College of Medicine, Hallym University, 1 Hallymdaehak-gil, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Hee-Jung Lee
- Department of Pharmacology, Institute of Natural Medicine, College of Medicine, Hallym University, 1 Hallymdaehak-gil, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Jung-Woo Hong
- Department of Pharmacology, Institute of Natural Medicine, College of Medicine, Hallym University, 1 Hallymdaehak-gil, Chuncheon, Gangwon-do 24252, Republic of Korea
| | - Hong-Won Suh
- Department of Pharmacology, Institute of Natural Medicine, College of Medicine, Hallym University, 1 Hallymdaehak-gil, Chuncheon, Gangwon-do 24252, Republic of Korea.
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Greenberg J, Martinez E, Negrin A, O'Donnell R, Uribe A, Kennelly EJ. A 1.6 mg/kg dose of epicatechin in a supplemented cocoa mixture yielded the largest acute decrease in food intake in humans. J Funct Foods 2018. [DOI: 10.1016/j.jff.2017.11.033] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
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Al-Ayed MSZ. Relaxant effect of ghrelin on guinea pig isolated tracheal smooth muscle: role of epithelial NO and PGE2. Pflugers Arch 2018; 470:949-958. [DOI: 10.1007/s00424-018-2126-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2018] [Accepted: 02/14/2018] [Indexed: 12/27/2022]
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KOŁODZIEJSKI PA, PRUSZYŃSKA-OSZMAŁEK E, KOREK E, SASSEK M, SZCZEPANKIEWICZ D, KACZMAREK P, NOGOWSKI L, MAĆKOWIAK P, NOWAK KW, KRAUSS H, STROWSKI MZ. Serum Levels of Spexin and Kisspeptin Negatively Correlate With Obesity and Insulin Resistance in Women. Physiol Res 2018; 67:45-56. [DOI: 10.33549/physiolres.933467] [Citation(s) in RCA: 74] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Spexin (SPX) and kisspeptin (KISS) are novel peptides relevant in the context of regulation of metabolism, food intake, puberty and reproduction. Here, we studied changes of serum SPX and KISS levels in female non-obese volunteers (BMI<25 kg/m2) and obese patients (BMI>35 kg/m2). Correlations between SPX or KISS with BMI, McAuley index, QUICKI, HOMA IR, serum levels of insulin, glucagon, leptin, adiponectin, orexin-A, obestatin, ghrelin and GLP-1 were assessed. Obese patients had lower SPX and KISS levels as compared to non-obese volunteers (SPX: 4.48±0.19 ng/ml vs. 6.63±0.29 ng/ml; p<0.001, KISS: 1.357±0.15 nmol/l vs. 2.165±0.174 nmol/l; p<0.01). SPX negatively correlated with BMI, HOMA-IR, insulin, glucagon, active ghrelin and leptin. Positive correlations were found between SPX and QUICKI index, McAuley index, serum levels of obestatin, GLP-1 and adiponectin and orexin-A Serum KISS negatively correlated with BMI, HOMA-IR, serum levels of insulin, glucagon, active ghrelin and leptin. KISS positively correlated with QUICKI index, McAuley index and adiponectin. In summary, SPX and KISS show negative correlations with obesity, insulin resistance indices, and hormones known to affect insulin sensitivity in females. Both, SPX and KISS could be therefore relevant in the pathophysiology of obesity and insulin resistance.
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Affiliation(s)
- P. A. KOŁODZIEJSKI
- Department of Animal Physiology and Biochemistry, Poznan University of Life Sciences, Poznan, Poland
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Takada K, Ishii A, Matsuo T, Nakamura C, Uji M, Yoshikawa T. Neural activity induced by visual food stimuli presented out of awareness: a preliminary magnetoencephalography study. Sci Rep 2018; 8:3119. [PMID: 29449657 PMCID: PMC5814400 DOI: 10.1038/s41598-018-21383-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 01/26/2018] [Indexed: 12/31/2022] Open
Abstract
Obesity is a major public health problem in modern society. Appetitive behavior has been proposed to be partially driven by unconscious decision-making processes and thus, targeting the unconscious cognitive processes related to eating behavior is essential to develop strategies for overweight individuals and obese patients. Here, we presented food pictures below the threshold of awareness to healthy male volunteers and examined neural activity related to appetitive behavior using magnetoencephalography. We found that, among participants who did not recognize food pictures during the experiment, an index of heart rate variability assessed by electrocardiography (low-frequency component power/high-frequency component power ratio, LF/HF) just after picture presentation was increased compared with that just before presentation, and the increase in LF/HF was negatively associated with the score for cognitive restraint of food intake. In addition, increased LF/HF was negatively associated with increased alpha band power in Brodmann area (BA) 47 caused by food pictures presented below the threshold of awareness, and level of cognitive restraint was positively associated with increased alpha band power in BA13. Our findings may provide valuable clues to the development of methods assessing unconscious regulation of appetite and offer avenues for further study of the neural mechanisms related to eating behavior.
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Affiliation(s)
- Katsuko Takada
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka, 545-8585, Japan
| | - Akira Ishii
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka, 545-8585, Japan.
| | - Takashi Matsuo
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka, 545-8585, Japan
| | - Chika Nakamura
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka, 545-8585, Japan
| | - Masato Uji
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka, 545-8585, Japan
| | - Takahiro Yoshikawa
- Department of Sports Medicine, Osaka City University Graduate School of Medicine, 1-4-3 Asahimachi, Abeno-ku, Osaka, 545-8585, Japan
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A meta-analysis of associations of LEPR Q223R and K109R polymorphisms with Type 2 diabetes risk. PLoS One 2018; 13:e0189366. [PMID: 29293570 PMCID: PMC5749718 DOI: 10.1371/journal.pone.0189366] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 11/26/2017] [Indexed: 12/17/2022] Open
Abstract
Background Leptin receptor (LEPR) plays a pivotal role in the control of body weight, energy metabolism, and insulin sensitivity. Various genetic association studies were performed to evaluate associations of LEPR genetic variants with type 2 diabetes (T2D) susceptibility. Methods A comprehensive search was conducted to identify all eligible case-control studies for examining the associations of LEPR single nucleotide polymorphisms (SNPs) Q223R (rs1137101) and K109R (rs1137100) with T2D risk. Odds ratios (OR) and corresponding 95% confidence intervals (CIs) were used to measure the magnitudes of association. Results For Q223R, 13 studies (11 articles) consisting of a total of 4030 cases and 2844 controls, and for K109R 7 studies (7 articles) consisting of 3319 cases and 2465 controls were available. Under an allele model, Q223R was not significantly associated with T2D risk (OR = 1.09, 95% CI: 0.80–1.48, P-value = 0.5989), which was consistent with results obtained under four genotypic models (ranges: ORs 1.08–1.20, 95% CIs: 0.58–2.02 to 0.64–2.26; P-values, 0.3650–0.8177, which all exceeded multiplicity-adjusted α = 0.05/5 = 0.01). In addition, no significant association was found between K109R and T2D risk based on either an allele model (OR = 0.93, 95% CI: 0.85–1.03, P-value = 0.1868) or four genotypic models (ranges: ORs 0.81–0.99, 95% CIs: 0.67–0.86 to 0.97–1.26, P-values, 0.0207–0.8804 which all exceeded multiplicity-adjusted α of 0.01). The magnitudes of association for these two SNPs were not dramatically changed in subgroup analyses by ethnicity or sensitivity analyses. Funnel plot inspections as well as Begg and Mazumdar adjusted rank correlation test and Egger linear regression test did not reveal significant publication biases in main and subgroup analyses. Bioinformatics analysis predicted that both missense SNPs were functionally neutral and benign. Conclusions The present meta-analysis did not detect significant genetic associations between LEPR Q223R and K109R polymorphisms and T2D risk.
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