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Cruciani-Guglielmacci C, Le Stunff H, Magnan C. Brain lipid sensing and the neural control of energy balance. Biochimie 2024; 223:159-165. [PMID: 38825062 DOI: 10.1016/j.biochi.2024.05.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2024] [Revised: 05/23/2024] [Accepted: 05/25/2024] [Indexed: 06/04/2024]
Abstract
The central nervous system continuously detects circulating concentrations of lipids such as fatty acids and troglycerides. Once information has been detected, the central nervous system can in turn participate in the control of energy balance and blood sugar levels and in particular regulate the secretion and action of insulin. Neurons capable of detecting circulating lipid variations are located in the hypothalamus and in other regions such as the nucleus accumbens, the striatum or the hippocampus. An excess of lipids will have deleterious effects and may induce central lipotoxicity, in particular following local production of ceramides and the appearance of neuroinflammation which may lead to metabolic diseases such as obesity and type 2 diabetes.
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Affiliation(s)
| | - Hervé Le Stunff
- Paris-Saclay Institute of Neuroscience, CNRS UMR 9197, Université Paris-Sud, University Paris Saclay, Orsay, France
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2
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Cincotta AH. Brain Dopamine-Clock Interactions Regulate Cardiometabolic Physiology: Mechanisms of the Observed Cardioprotective Effects of Circadian-Timed Bromocriptine-QR Therapy in Type 2 Diabetes Subjects. Int J Mol Sci 2023; 24:13255. [PMID: 37686060 PMCID: PMC10487918 DOI: 10.3390/ijms241713255] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2023] [Revised: 07/19/2023] [Accepted: 07/27/2023] [Indexed: 09/10/2023] Open
Abstract
Despite enormous global efforts within clinical research and medical practice to reduce cardiovascular disease(s) (CVD), it still remains the leading cause of death worldwide. While genetic factors clearly contribute to CVD etiology, the preponderance of epidemiological data indicate that a major common denominator among diverse ethnic populations from around the world contributing to CVD is the composite of Western lifestyle cofactors, particularly Western diets (high saturated fat/simple sugar [particularly high fructose and sucrose and to a lesser extent glucose] diets), psychosocial stress, depression, and altered sleep/wake architecture. Such Western lifestyle cofactors are potent drivers for the increased risk of metabolic syndrome and its attendant downstream CVD. The central nervous system (CNS) evolved to respond to and anticipate changes in the external (and internal) environment to adapt survival mechanisms to perceived stresses (challenges to normal biological function), including the aforementioned Western lifestyle cofactors. Within the CNS of vertebrates in the wild, the biological clock circuitry surveils the environment and has evolved mechanisms for the induction of the obese, insulin-resistant state as a survival mechanism against an anticipated ensuing season of low/no food availability. The peripheral tissues utilize fat as an energy source under muscle insulin resistance, while increased hepatic insulin resistance more readily supplies glucose to the brain. This neural clock function also orchestrates the reversal of the obese, insulin-resistant condition when the low food availability season ends. The circadian neural network that produces these seasonal shifts in metabolism is also responsive to Western lifestyle stressors that drive the CNS clock into survival mode. A major component of this natural or Western lifestyle stressor-induced CNS clock neurophysiological shift potentiating the obese, insulin-resistant state is a diminution of the circadian peak of dopaminergic input activity to the pacemaker clock center, suprachiasmatic nucleus. Pharmacologically preventing this loss of circadian peak dopaminergic activity both prevents and reverses existing metabolic syndrome in a wide variety of animal models of the disorder, including high fat-fed animals. Clinically, across a variety of different study designs, circadian-timed bromocriptine-QR (quick release) (a unique formulation of micronized bromocriptine-a dopamine D2 receptor agonist) therapy of type 2 diabetes subjects improved hyperglycemia, hyperlipidemia, hypertension, immune sterile inflammation, and/or adverse cardiovascular event rate. The present review details the seminal circadian science investigations delineating important roles for CNS circadian peak dopaminergic activity in the regulation of peripheral fuel metabolism and cardiovascular biology and also summarizes the clinical study findings of bromocriptine-QR therapy on cardiometabolic outcomes in type 2 diabetes subjects.
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3
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Wargent ET, Ahmad SJS, Lu QR, Kostenis E, Arch JRS, Stocker CJ. Leanness and Low Plasma Leptin in GPR17 Knockout Mice Are Dependent on Strain and Associated With Increased Energy Intake That Is Not Suppressed by Exogenous Leptin. Front Endocrinol (Lausanne) 2021; 12:698115. [PMID: 34646232 PMCID: PMC8503278 DOI: 10.3389/fendo.2021.698115] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Accepted: 08/20/2021] [Indexed: 11/16/2022] Open
Abstract
Previous studies have shown that agonists of GPR17 stimulate, while antagonists inhibit feeding. However, whole body knockout of GPR17 in mice of the C57Bl/6 strain did not affect energy balance, whereas selective knockout in oligodendrocytes or pro-opiomelanocortin neurons provided protection from high fat diet-induced obesity and impaired glucose homeostasis. We reasoned that whole body knockout of GPR17 in mice of the 129 strain might elicit more marked effects because the 129 strain is more susceptible than the C57Bl/6 strain to increased sympathetic activity and less susceptible to high fat diet-induced obesity. Consistent with this hypothesis, compared to wild-type mice, and when fed on either a chow or a high fat diet, GPR17 -/- mice of the 129 strain displayed increased expression of uncoupling protein-1 in white adipose tissue, lower body weight and fat content, reduced plasma leptin, non-esterified fatty acids and triglycerides, and resistance to high fat diet-induced glucose intolerance. Not only energy expenditure, but also energy intake was raised. Administration of leptin did not suppress the increased food intake in GPR17 -/- mice of the 129 strain, whereas it did suppress food intake in GPR17 +/+ mice. The only difference between GPR17 +/- and GPR17 +/+ mice of the C57Bl/6 strain was that the body weight of the GPR17 -/- mice was lower than that of the GPR17 +/+ mice when the mice were fed on a standard chow diet. We propose that the absence of GPR17 raises sympathetic activity in mice of the 129 strain in response to a low plasma fuel supply, and that the consequent loss of body fat is partly mitigated by increased energy intake.
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Affiliation(s)
- Edward T. Wargent
- Institute of Translational Medicine, University of Buckingham, Buckingham, United Kingdom
| | - Suhaib J. S. Ahmad
- Department of Surgery, Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Qing Richard Lu
- Division of Experimental Hematology and Cancer Biology, Department of Pediatrics, Brain Tumor Center, Cincinnati Children’s Hospital Medical Center, Cincinnati, OH, United States
| | | | - Jonathan R. S. Arch
- Institute of Translational Medicine, University of Buckingham, Buckingham, United Kingdom
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4
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Le Foll C. Hypothalamic Fatty Acids and Ketone Bodies Sensing and Role of FAT/CD36 in the Regulation of Food Intake. Front Physiol 2019; 10:1036. [PMID: 31474875 PMCID: PMC6702519 DOI: 10.3389/fphys.2019.01036] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 07/29/2019] [Indexed: 12/19/2022] Open
Abstract
The obesity and type-2 diabetes epidemic is escalating and represents one of the costliest biomedical challenges confronting modern society. Moreover, the increasing consumption of high fat food is often correlated with an increase in body mass index. In people predisposed to be obese or already obese, the impaired ability of the brain to monitor and respond to alterations in fatty acid (FA) metabolism is increasingly recognized as playing a role in the pathophysiological development of these disorders. The brain senses and regulates metabolism using highly specialized nutrient-sensing neurons located mainly in the hypothalamus. The same neurons are able to detect variation in the extracellular levels of glucose, FA and ketone bodies as a way to monitor nutrient availability and to alter its own activity. In addition, glial cells such as astrocytes create major connections to neurons and form a tight relationship to closely regulate nutrient uptake and metabolism. This review will examine the different pathways by which neurons are able to detect free fatty acids (FFA) to alter its activity and how high fat diet (HFD)-astrocytes induced ketone bodies production interplays with neuronal FA sensing. The role of HFD-induced inflammation and how FA modulate the reward system will also be investigated here.
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Affiliation(s)
- Christelle Le Foll
- Institute of Veterinary Physiology, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
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5
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Lost in Translation? On the Need for Convergence in Animal and
Human Studies on the Role of Dopamine in Diet-Induced Obesity. CURRENT ADDICTION REPORTS 2019. [DOI: 10.1007/s40429-019-00268-w] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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6
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Feistauer V, Vitolo MR, Campagnolo PDB, Mattevi VS, Almeida S. Evaluation of association of DRD2 TaqIA and -141C InsDel polymorphisms with food intake and anthropometric data in children at the first stages of development. Genet Mol Biol 2018; 41:562-569. [PMID: 30044466 PMCID: PMC6136368 DOI: 10.1590/1678-4685-gmb-2017-0202] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Accepted: 01/09/2018] [Indexed: 01/17/2023] Open
Abstract
The reward sensation after food intake may be different between individuals and variants in genes related to the dopaminergic system may indicate a different response in people exposed to the same environmental factors. This study investigated the association of TaqIA (rs1800497) and -141C InsDel (rs1799732) variants in DRD2/ANKK1 gene with food intake and adiposity parameters in a cohort of children. The sample consisted of 270 children followed until 7 to 8 years old. DNA was extracted from blood and polymorphisms were detected by PCR-RFLP analysis. Food intake and nutritional status were compared among individuals with different SNP genotypes. Children carrying the A1 allele (TaqIA) had higher energy of lipid dense foods (LDF) when compared with A2/A2 homozygous children at 7 to 8 years old (GLM p=0.004; Mann Whitney p=0.005). No association was detected with -141C Ins/Del polymorphism. To our knowledge, this is the first association study of the DRD2 TaqIA and -141C Ins/Del polymorphism with food intake and anthropometric parameters in children. DRD2 TaqIA polymorphism has been associated with a reduction in D2 dopamine receptor availability. Therefore, the differences observed in LDF intake in our sample may occur as an effort to compensate the hypodopaminergic functioning.
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Affiliation(s)
- Vanessa Feistauer
- Laboratório de Biologia Molecular, Programa de Pós-Graduação em Biociências, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brazil
| | - Márcia R Vitolo
- Departamento de Saúde Coletiva, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brazil
| | - Paula D B Campagnolo
- Curso de Nutrição, Universidade do Vale do Rio dos Sinos, São Leopoldo, RS, Brazil
| | - Vanessa S Mattevi
- Laboratório de Biologia Molecular, Programa de Pós-Graduação em Biociências, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brazil.,Departamento de Ciências Básicas da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brazil
| | - Silvana Almeida
- Laboratório de Biologia Molecular, Programa de Pós-Graduação em Biociências, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brazil.,Departamento de Ciências Básicas da Saúde, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, RS, Brazil
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Mechanick JI, Zhao S, Garvey WT. Leptin, An Adipokine With Central Importance in the Global Obesity Problem. Glob Heart 2017; 13:113-127. [PMID: 29248361 DOI: 10.1016/j.gheart.2017.10.003] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 10/25/2017] [Indexed: 02/08/2023] Open
Abstract
Leptin has central importance in the global obesity and cardiovascular disease problem. Leptin is principally secreted by adipocytes and acts in the hypothalamus to suppress appetite and food intake, increase energy expenditure, and regulate body weight. Based on clinical translation of specific and networked actions, leptin affects the cardiovascular system and may be a marker and driver of cardiometabolic risk factors with interventions that are actionable by cardiologists. Leptin subnetwork analysis demonstrates a statistically significant role for ethnoculturally and socioeconomically appropriate lifestyle intervention in cardiovascular disease. Emergent mechanistic components and potential diagnostic or therapeutic targets include hexokinase 3, urocortins, clusterin, sialic acid-binding immunoglobulin-like lectin 6, C-reactive protein, platelet glycoprotein VI, albumin, pentraxin 3, ghrelin, obestatin prepropeptide, leptin receptor, neuropeptide Y, and corticotropin-releasing factor receptor 1. Emergent associated symptoms include weight change, eating disorders, vascular necrosis, chronic fatigue, and chest pain. Leptin-targeted therapies are reported for lipodystrophy and leptin deficiency, but they are investigational for leptin resistance, obesity, and other chronic diseases.
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Affiliation(s)
- Jeffrey I Mechanick
- Division of Cardiology, Icahn School of Medicine at Mount Sinai, New York, NY, USA; Division of Endocrinology, Diabetes, and Bone Disease, Icahn School of Medicine at Mount Sinai, New York, NY, USA.
| | - Shan Zhao
- Basepaws Inc., Redondo Beach, CA, USA
| | - W Timothy Garvey
- Department of Nutritional Sciences and Diabetes Research Center, University of Alabama at Birmingham, Birmingham, AL, USA; Geriatric Research Education and Clinical Center, Birmingham Veterans Affairs Medical Center, Birmingham, AL, USA
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Arpón A, Milagro FI, Laja A, Segura V, de Pipaón MS, Riezu-Boj JI, Alfredo Martínez J. Methylation changes and pathways affected in preterm birth: a role for SLC6A3 in neurodevelopment. Epigenomics 2017; 10:91-103. [PMID: 29172706 DOI: 10.2217/epi-2017-0082] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
AIM To analyze whether preterm newborns show differences in methylation patterns in comparison to full-term newborns in white blood cells. PATIENTS & METHODS Anthropometrical, biochemical features and methylation levels of preterm newborns (n = 24) and full-term newborns (n = 22) recruited in La Paz University Hospital (Spain) were assessed at 12 months of gestational age, whereas Bayley Scale of Infant Development was evaluated at 24/36 months. RESULTS From all the statistically significant CpGs, methylation levels of cg00997378 (SLC6A3 gene) showed the highest differences (p < 0.0001), being associated with prematurity risk factors. CONCLUSION SLC6A3 methylation, previously related to attention-deficit/hyperactivity disorder, neuronal function and behavior, might be a potential epigenetic biomarker with value in the early diagnosis and management of neurodevelopmental diseases in newborns.
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Affiliation(s)
- Ana Arpón
- Department of Nutrition, Food Sciences & Physiology, Universidad de Navarra, Irunlarrea 1, 31008 Pamplona, Spain.,Centre for Nutrition Research, Universidad de Navarra, Irunlarrea 1, 31008 Pamplona, Spain
| | - Fermín I Milagro
- Department of Nutrition, Food Sciences & Physiology, Universidad de Navarra, Irunlarrea 1, 31008 Pamplona, Spain.,Centre for Nutrition Research, Universidad de Navarra, Irunlarrea 1, 31008 Pamplona, Spain.,Spanish Biomedical Research Centre in Physiopathology of Obesity & Nutrition (CIBERobn), Institute of Health Carlos III, Madrid, Spain
| | - Ana Laja
- Department of Pharmaceutical & Health Sciences, Faculty of Pharmacy, CEU San Pablo University, Madrid, Spain
| | - Víctor Segura
- Unit of Bioinformatics, Centre for Applied Medical Research (CIMA), Universidad de Navarra, Pamplona, Spain
| | - Miguel Sáenz de Pipaón
- Neonatology Department, Hospital Universitario de la Paz, Madrid, Spain.,Instituto de Salud Carlos III, Red de Salud Materno Infantil y Desarrollo (SAMID), Madrid, Spain.,Department of Pediatrics, Universidad Autónoma de Madrid, Madrid, Spain
| | - José-Ignacio Riezu-Boj
- Department of Nutrition, Food Sciences & Physiology, Universidad de Navarra, Irunlarrea 1, 31008 Pamplona, Spain.,Centre for Nutrition Research, Universidad de Navarra, Irunlarrea 1, 31008 Pamplona, Spain.,Digestive disease and Nutrition group, Navarra Institute for Health Research (IdiSNa), Pamplona, Spain
| | - J Alfredo Martínez
- Department of Nutrition, Food Sciences & Physiology, Universidad de Navarra, Irunlarrea 1, 31008 Pamplona, Spain.,Centre for Nutrition Research, Universidad de Navarra, Irunlarrea 1, 31008 Pamplona, Spain.,Spanish Biomedical Research Centre in Physiopathology of Obesity & Nutrition (CIBERobn), Institute of Health Carlos III, Madrid, Spain.,Digestive disease and Nutrition group, Navarra Institute for Health Research (IdiSNa), Pamplona, Spain.,Madrid Institute of Advanced Studies (IMDEA), IMDEA Food, Madrid, Spain
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9
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Martinotti G, Montemitro C, Baroni G, Andreoli S, Alimonti F, Di Nicola M, Tonioni F, Leggio L, di Giannantonio M, Janiri L. Relationship between craving and plasma leptin concentrations in patients with cocaine addiction. Psychoneuroendocrinology 2017; 85:35-41. [PMID: 28806585 DOI: 10.1016/j.psyneuen.2017.08.004] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2017] [Revised: 08/02/2017] [Accepted: 08/03/2017] [Indexed: 12/14/2022]
Abstract
BACKGROUND There is robust evidence indicating an overlap between neurobiological circuitry and pathways that regulate addictions and those that regulate appetite and food intake. Rodent work suggests a role of the appetitive peptide leptin in cocaine-seeking behaviours. The goal of this study was to investigate the possible relationship between plasma leptin concentrations and cocaine craving and use in patients seeking treatment for cocaine dependence. METHODS Patients (N=43) with a DSM-IV diagnosis of cocaine dependence were studied before starting detoxification (baseline; T0) and then again 14days after (T1; only those patients who abstained from cocaine during the study). Blood samples for plasma leptin concentrations were collected and cocaine craving was assessed using the Brief Cocaine Craving Questionnaire (Brief-CCQ). Food craving was also assessed using a food Visual Analogue Scale (f-VAS). Barratt Impulsiveness Scale (BIS) was used to evaluate impulsivity. RESULTS Plasma leptin concentrations at T0 significantly correlated with baseline Brief-CCQ scores (r=0.34, p<0.05). Furthermore, plasma leptin concentrations at T1 significantly correlated with the baseline amount of cocaine used (r=0.5, p<0.05). There were no significant correlations between plasma leptin concentrations and f-VAS scores either at T0 or T1 (p's>0.05). CONCLUSIONS The present study suggests a potential relationship between plasma leptin concentrations and cocaine craving and use. Future mechanistic studies are needed to determine whether manipulations of leptin signalling may lead to novel pharmacological approaches to treat cocaine addiction.
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Affiliation(s)
- Giovanni Martinotti
- Department of Neuroscience Imaging and Clinical Science, "G. d'Annunzio" University of Chieti, Italy; Department of Pharmacy, Pharmacology and Clinical Science, University of Hertfordshire, Herts, UK
| | - Chiara Montemitro
- Department of Neuroscience Imaging and Clinical Science, "G. d'Annunzio" University of Chieti, Italy.
| | - Gaia Baroni
- Department of Neuroscience Imaging and Clinical Science, "G. d'Annunzio" University of Chieti, Italy
| | - Sara Andreoli
- Department of Psychiatry, Catholic University Medical School, Rome, Italy
| | - Flaminia Alimonti
- Department of Psychiatry, Catholic University Medical School, Rome, Italy
| | - Marco Di Nicola
- Department of Psychiatry, Catholic University Medical School, Rome, Italy
| | - Federico Tonioni
- Department of Psychiatry, Catholic University Medical School, Rome, Italy
| | - Lorenzo Leggio
- Section on Clinical Psychoneuroendocrinology and Neuropsychopharmacology, National Institute on Alcohol Abuse and Alcoholism and National Institute on Drug Abuse, National Institutes of Health, Bethesda, MD, USA; Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, Brown University, Providence, RI, USA
| | - Massimo di Giannantonio
- Department of Neuroscience Imaging and Clinical Science, "G. d'Annunzio" University of Chieti, Italy
| | - Luigi Janiri
- Department of Psychiatry, Catholic University Medical School, Rome, Italy
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Rubio-Martín E, García-Escobar E, Ruiz de Adana MS, Lima-Rubio F, Peláez L, Caracuel AM, Bermúdez-Silva FJ, Soriguer F, Rojo-Martínez G, Olveira G. Comparison of the Effects of Goat Dairy and Cow Dairy Based Breakfasts on Satiety, Appetite Hormones, and Metabolic Profile. Nutrients 2017; 9:nu9080877. [PMID: 28809789 PMCID: PMC5579670 DOI: 10.3390/nu9080877] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2017] [Revised: 08/08/2017] [Accepted: 08/10/2017] [Indexed: 01/14/2023] Open
Abstract
The satiating effects of cow dairy have been thoroughly investigated; however, the effects of goat dairy on appetite have not been reported so far. Our study investigates the satiating effect of two breakfasts based on goat or cow dairy and their association with appetite related hormones and metabolic profile. Healthy adults consumed two breakfasts based on goat (G-Breakfast) or cow (C-Breakfast) dairy products. Blood samples were taken and VAS tests were performed at different time points. Blood metabolites were measured and Combined Satiety Index (CSI) and areas under the curves (AUC) were calculated. Desire to eat rating was significantly lower (breakfast & time interaction p < 0.01) and hunger rating tended to be lower (breakfast & time interaction p = 0.06) after the G-breakfast. None of the blood parameters studied were different between breakfasts; however, AUCGLP-1 was inversely associated with the AUChunger and AUCdesire-to-eat after the G-Breakfast, whereas triglyceride levels were directly associated with AUCCSI after the C-Breakfast. Our results suggest a slightly higher satiating effect of goat dairy when compared to cow dairy products, and pointed to a potential association of GLP-1 and triglyceride levels with the mechanisms by which dairy products might affect satiety after the G-Breakfast and C-Breakfast, respectively.
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Affiliation(s)
- Elehazara Rubio-Martín
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Málaga/Universidad de Málaga, 29009 Malaga, Spain.
- Centro de Investigación Biomédica en Red (CIBERDEM CB07/08/0019), Instituto de Salud Carlos III, 29009 Malaga, Spain.
| | - Eva García-Escobar
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Málaga/Universidad de Málaga, 29009 Malaga, Spain.
- Centro de Investigación Biomédica en Red (CIBERDEM CB07/08/0019), Instituto de Salud Carlos III, 29009 Malaga, Spain.
| | - Maria-Soledad Ruiz de Adana
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Málaga/Universidad de Málaga, 29009 Malaga, Spain.
- Centro de Investigación Biomédica en Red (CIBERDEM CB07/08/0019), Instituto de Salud Carlos III, 29009 Malaga, Spain.
| | - Fuensanta Lima-Rubio
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Málaga/Universidad de Málaga, 29009 Malaga, Spain.
| | - Laura Peláez
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Málaga/Universidad de Málaga, 29009 Malaga, Spain.
| | - Angel-María Caracuel
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Málaga/Universidad de Málaga, 29009 Malaga, Spain.
| | - Francisco-Javier Bermúdez-Silva
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Málaga/Universidad de Málaga, 29009 Malaga, Spain.
- Centro de Investigación Biomédica en Red (CIBERDEM CB07/08/0019), Instituto de Salud Carlos III, 29009 Malaga, Spain.
| | - Federico Soriguer
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Málaga/Universidad de Málaga, 29009 Malaga, Spain.
- Centro de Investigación Biomédica en Red (CIBERDEM CB07/08/0019), Instituto de Salud Carlos III, 29009 Malaga, Spain.
| | - Gemma Rojo-Martínez
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Málaga/Universidad de Málaga, 29009 Malaga, Spain.
- Centro de Investigación Biomédica en Red (CIBERDEM CB07/08/0019), Instituto de Salud Carlos III, 29009 Malaga, Spain.
| | - Gabriel Olveira
- UGC Endocrinología y Nutrición, Instituto de Investigación Biomédica de Málaga (IBIMA), Hospital Universitario Regional de Málaga/Universidad de Málaga, 29009 Malaga, Spain.
- Centro de Investigación Biomédica en Red (CIBERDEM CB07/08/0019), Instituto de Salud Carlos III, 29009 Malaga, Spain.
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Contreras C, Nogueiras R, Diéguez C, Rahmouni K, López M. Traveling from the hypothalamus to the adipose tissue: The thermogenic pathway. Redox Biol 2017; 12:854-863. [PMID: 28448947 PMCID: PMC5406580 DOI: 10.1016/j.redox.2017.04.019] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 04/08/2017] [Accepted: 04/11/2017] [Indexed: 01/13/2023] Open
Abstract
Brown adipose tissue (BAT) is a specialized tissue critical for non-shivering thermogenesis producing heat through mitochondrial uncoupling; whereas white adipose tissue (WAT) is responsible of energy storage in the form of triglycerides. Another type of fat has been described, the beige adipose tissue; this tissue emerges in existing WAT depots but with thermogenic ability, a phenomenon known as browning. Several peripheral signals relaying information about energy status act in the brain, particularly the hypothalamus, to regulate thermogenesis in BAT and browning of WAT. Different hypothalamic areas have the capacity to regulate the thermogenic process in brown and beige adipocytes through the sympathetic nervous system (SNS). This review discusses important concepts and discoveries about the central control of thermogenesis as a trip that starts in the hypothalamus, and taking the sympathetic roads to reach brown and beige fat to modulate thermogenic functions.
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Affiliation(s)
- Cristina Contreras
- Department of Physiology, CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela 15782, Spain; CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela 15706, Spain.
| | - Rubén Nogueiras
- Department of Physiology, CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela 15782, Spain; CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela 15706, Spain
| | - Carlos Diéguez
- Department of Physiology, CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela 15782, Spain; CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela 15706, Spain
| | - Kamal Rahmouni
- Department of Pharmacology, University of Iowa, Iowa City, Iowa 52242, USA; Fraternal Order of Eagles Diabetes Research Center, University of Iowa, Iowa City, Iowa 52242, USA
| | - Miguel López
- Department of Physiology, CIMUS, University of Santiago de Compostela-Instituto de Investigación Sanitaria, Santiago de Compostela 15782, Spain; CIBER Fisiopatología de la Obesidad y Nutrición (CIBERobn), Santiago de Compostela 15706, Spain.
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Butt ZD, Hackett JD, Volkoff H. Irisin in goldfish (Carassius auratus): Effects of irisin injections on feeding behavior and expression of appetite regulators, uncoupling proteins and lipoprotein lipase, and fasting-induced changes in FNDC5 expression. Peptides 2017; 90:27-36. [PMID: 28219696 DOI: 10.1016/j.peptides.2017.02.003] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Revised: 02/06/2017] [Accepted: 02/13/2017] [Indexed: 12/21/2022]
Abstract
Irisin is a peptide cleaved from the fibronectin type III domain containing protein 5 (FNDC5) gene that is secreted predominantly by muscle cells but also by other tissues including brain and intestine. In mammals, irisin has been shown to have thermogenic actions via the modulation of uncoupling proteins (UCPs) and to affect feeding and energy homeostasis via actions in brain, adipose tissue, liver, muscle and gastrointestinal tract. To examine the role of irisin on feeding and metabolism in fish, the effects of peripheral (intraperitoneal) injections of irisin on feeding behavior, glucose levels and the mRNA expressions of appetite regulators (cocaine and amphetamine regulated transcript CART, agouti related protein AgRP, orexin), UCPs and lipoprotein lipase LPL and brain factors (brain-derived neurotrophic factor , BDNF and tyrosine hydroxylase TH) were assessed in brain, white muscle and intestine. Irisin injections (100ng/g) induced a decrease in food intake and increases in brain orexin, CART1 and CART2, UCP2, BDNF, muscle UCP2 and intestine LPL mRNA expressions but did not affect blood glucose levels, brain AgRP, TH, UCP1, UCP3 and LPL or muscle UCP1, UCP3 and LPL expressions. A partial goldfish FNDC5 cDNA was isolated and the expressions of FDNC5, UCPs, LPL and BDNF were also compared between fed and fasted fish. Fasting induced decreases FNDC5 mRNA expression in the brain and intestine, but not in muscle. Fasting also induced increases in brain BDNF and LPL expressions and increases in UCP1, UCP2, UCP3 and LPL expressions in muscle. Our result suggest that irisin is an anorexigenic factor in fish and its actions might be in part mediated by appetite-regulating factors such as CART and orexins as well as UCP2 and brain factors such as BDNF.
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Affiliation(s)
- Zahndra Diann Butt
- Departments of Biology and Biochemistry, Memorial University of Newfoundland, St. John's, NL A1 B 3X9, Canada
| | - Jessica Dalton Hackett
- Departments of Biology and Biochemistry, Memorial University of Newfoundland, St. John's, NL A1 B 3X9, Canada
| | - Hélène Volkoff
- Departments of Biology and Biochemistry, Memorial University of Newfoundland, St. John's, NL A1 B 3X9, Canada.
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Sun X, Luquet S, Small DM. DRD2: Bridging the Genome and Ingestive Behavior. Trends Cogn Sci 2017; 21:372-384. [PMID: 28372879 DOI: 10.1016/j.tics.2017.03.004] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2016] [Revised: 02/10/2017] [Accepted: 03/06/2017] [Indexed: 12/26/2022]
Abstract
Recent work highlights the importance of genetic variants that influence brain structure and function in conferring risk for polygenic obesity. The neurotransmitter dopamine (DA) has a pivotal role in energy balance by integrating metabolic signals with circuits supporting cognitive, perceptual, and appetitive functions that guide feeding. It has also been established that diet and obesity alter DA signaling, leading to compulsive-like feeding and neurocognitive impairments. This raises the possibility that genetic variants that influence DA signaling and adaptation confer risk for overeating and cognitive decline. Here, we consider the role of two common gene variants, FTO and TaqIA rs1800497 in driving gene × environment interactions promoting obesity, metabolic dysfunction, and cognitive change via their influence on DA receptor subtype 2 (DRD2) signaling.
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Affiliation(s)
- Xue Sun
- Department of Psychology, University of Pennsylvania, Philadelphia, PA, USA
| | - Serge Luquet
- Université Paris Diderot, Sorbonne Paris Cité, BFA CNRS UMR 8251, Paris, France; Modern Diet and Physiology Research Center, New Haven, CT, USA
| | - Dana M Small
- Modern Diet and Physiology Research Center, New Haven, CT, USA; The John B. Pierce Laboratory, 290 Congress Avenue, New Haven, CT, USA; Department of Psychiatry, Yale School of Medicine, New Haven, CT, USA; Department of Psychology, Yale University, New Haven, CT, USA.
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Goodyear K, Lee MR, Schwandt ML, Hodgkinson CA, Leggio L. Hepatic, lipid and genetic factors associated with obesity: crosstalk with alcohol dependence? World J Biol Psychiatry 2017; 18:120-128. [PMID: 27905213 PMCID: PMC5382351 DOI: 10.1080/15622975.2016.1249952] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
OBJECTIVES Alcohol dependence represents a leading cause of mortality and morbidity. Understanding the variables that contribute to this diagnosis and its severity is critical. An overlap between factors that may predispose people to become obese and those that may increase the risk of alcohol dependence may exist. However, data in the literature are not conclusive. Therefore, this study aimed to identify the association between alcohol dependence and obesity-related factors, including biochemical and genetic factors. METHODS In a case-control study with 829 participants, factors involved with metabolism and obesity were assessed, including biochemical lipid and liver markers, and the fat mass and obesity-associated (FTO) single nucleotide polymorphism (SNP) rs8050136. RESULTS Increased triglycerides, having one or two minor A alleles for rs8050136 and being a smoker were associated with increased risk of alcohol dependence, while increased low-density lipoprotein cholesterol was associated with decreased risk. In addition, having abnormal gamma-glutamyl transferase and being female were factors associated with an increased severity of alcohol dependence. CONCLUSIONS Our preliminary findings suggest a link between alcohol dependence and obesity-related biochemical and genetic factors. Future studies are needed to better understand if these factors may play a predictive role and/or may act as biomarkers for treatment response.
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Affiliation(s)
- Kimberly Goodyear
- Section on Clinical Psychoneuroendocrinology and Neuropsychopharmacology, National Institute on Alcohol Abuse and Alcoholism and National Institute on Drug Abuse, Bethesda, MD, USA,Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, Brown University, Providence, RI, USA
| | - Mary R. Lee
- Section on Clinical Psychoneuroendocrinology and Neuropsychopharmacology, National Institute on Alcohol Abuse and Alcoholism and National Institute on Drug Abuse, Bethesda, MD, USA
| | - Melanie L. Schwandt
- Office of the Clinical Director, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Bethesda, MD, USA
| | - Colin A. Hodgkinson
- Laboratory of Neurogenetics, National Institute on Alcohol Abuse and Alcoholism, National Institutes of Health, Rockville, MD, USA
| | - Lorenzo Leggio
- Section on Clinical Psychoneuroendocrinology and Neuropsychopharmacology, National Institute on Alcohol Abuse and Alcoholism and National Institute on Drug Abuse, Bethesda, MD, USA,Center for Alcohol and Addiction Studies, Department of Behavioral and Social Sciences, Brown University, Providence, RI, USA,Corresponding author: Lorenzo Leggio, M.D., Ph.D., M.Sc., Section on Clinical Psychoneuroendocrinology and Neuropsychopharmacology, National Institute on Alcohol Abuse and Alcoholism and National Institute on Drug Abuse, 10 Center Drive (10CRC/15330), Bethesda, MD 20892-1108, Telephone: 301-435-9398,
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15
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Magnan C, Levin BE, Luquet S. Brain lipid sensing and the neural control of energy balance. Mol Cell Endocrinol 2015; 418 Pt 1:3-8. [PMID: 26415589 DOI: 10.1016/j.mce.2015.09.019] [Citation(s) in RCA: 60] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/26/2014] [Revised: 09/14/2015] [Accepted: 09/22/2015] [Indexed: 12/29/2022]
Abstract
Fatty acid (FA) -sensitive neurons are present in the brain, especially the hypothalamus, and play a key role in the neural control of energy and glucose homeostasis including feeding behavior, secretion insulin and action. Subpopulations of neurons in the arcuate and ventromedial hypothalamic nuclei are selectively either activated or inhibited by FA. Molecular effectors of these FA effects include ion channels such as chloride, potassium or calcium. In addition, at least half of the responses in the hypothalamic ventromedial FA neurons are mediated through interaction with the FA translocator/receptor, FAT/CD36, that does not require metabolism to activate intracellular signaling downstream. Recently, an important role of lipoprotein lipase in FA detection has also been demonstrated not only in the hypothalamus, but also in the hippocampus and striatum. Finally, FA could overload energy homeostasis via increased hypothalamic ceramide synthesis which could, in turn, contribute to the pathogenesis of diabetes of obesity and/or type 2 in predisposed individuals by disrupting the endocrine signaling pathways of insulin and/or leptin.
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Affiliation(s)
- Christophe Magnan
- Univ Paris Diderot, Sorbonne Paris Cité, CNRS UMR 8251, F-75205, Paris, France.
| | - Barry E Levin
- Neurology Service, VA Medical Center, East Orange, NJ, USA; Department of Neurology, Rutgers, NJ Medical School, Newark, NJ, USA
| | - Serge Luquet
- Univ Paris Diderot, Sorbonne Paris Cité, CNRS UMR 8251, F-75205, Paris, France
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