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Garthwaite T, Sjöros T, Laine S, Koivumäki M, Vähä-Ypyä H, Verho T, Norha J, Kallio P, Saarenhovi M, Löyttyniemi E, Sievänen H, Houttu N, Laitinen K, Kalliokoski KK, Vasankari T, Knuuti J, Heinonen I. Sedentary time associates detrimentally and physical activity beneficially with metabolic flexibility in adults with metabolic syndrome. Am J Physiol Endocrinol Metab 2024; 326:E503-E514. [PMID: 38416072 PMCID: PMC11194051 DOI: 10.1152/ajpendo.00338.2023] [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: 10/13/2023] [Revised: 02/13/2024] [Accepted: 02/27/2024] [Indexed: 02/29/2024]
Abstract
Metabolic flexibility (MetFlex) describes the ability to respond and adapt to changes in metabolic demand and substrate availability. The relationship between physical (in)activity and MetFlex is unclear. This study aimed to determine whether sedentary time, physical activity (PA), and cardiorespiratory fitness associate with MetFlex. Sedentary time, standing, and PA were measured with accelerometers for 4 weeks in 64 sedentary adults with metabolic syndrome [37 women, 27 men; 58.3 (SD 6.8) years]. Fitness (V̇o2max; mL·kg-1·min-1) was measured with graded maximal cycle ergometry. MetFlex was assessed with indirect calorimetry as the change in respiratory exchange ratio (ΔRER) from fasting to insulin stimulation with hyperinsulinemic-euglycemic clamp and from low-intensity to maximal exercise. Carbohydrate (CHOox) and fat oxidation (FATox) were calculated from respiratory gases. High sedentary time associated with higher fasting RER [β = 0.35 (95% confidence interval: 0.04, 0.67)], impaired insulin-stimulated MetFlex (ΔRER) [β=-0.41 (-0.72, -0.09)], and lower fasting FATox [β=-0.36 (-0.67, -0.04)]. Standing associated with lower fasting RER [β=-0.32 (-0.62, -0.02)]. Higher standing time and steps/day associated with higher fasting FATox [β = 0.31 (0.01, 0.61), and β = 0.26 (0.00, 0.53)]. Light-intensity and total PA associated with better insulin-stimulated MetFlex [β = 0.33 (0.05, 0.61)], and β = 0.33 (0.05, 0.60)]. Higher V̇o2max associated with higher CHOox during maximal exercise [β = 0.81 (0.62, 1.00)], as well as during insulin stimulation [β = 0.43 (0.13, 0.73)]. P values are less than 0.05 for all associations. Sedentary time and PA associate with MetFlex. Reducing sitting and increasing PA of even light intensity might aid in the prevention of metabolic diseases in risk populations through their potential effects on energy metabolism.NEW & NOTEWORTHY High accelerometer-assessed sedentary time associates with metabolic inflexibility measured during hyperinsulinemic-euglycemic clamp in adults with metabolic syndrome, and more light-intensity and total physical activity associate with more metabolic flexibility. Physical activity behaviors may thus play an important role in the regulation of fuel metabolism. This highlights the potential of reduced sedentary time and increased physical activity of any intensity to induce metabolic health benefits and help in disease prevention in risk populations.
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Affiliation(s)
- Taru Garthwaite
- Turku PET Centre, University of Turku, Åbo Akademi University, and Turku University Hospital, Turku, Finland
| | - Tanja Sjöros
- Turku PET Centre, University of Turku, Åbo Akademi University, and Turku University Hospital, Turku, Finland
| | - Saara Laine
- Turku PET Centre, University of Turku, Åbo Akademi University, and Turku University Hospital, Turku, Finland
| | - Mikko Koivumäki
- Turku PET Centre, University of Turku, Åbo Akademi University, and Turku University Hospital, Turku, Finland
| | - Henri Vähä-Ypyä
- The UKK Institute for Health Promotion Research, Tampere, Finland
| | - Tiina Verho
- Turku PET Centre, University of Turku, Åbo Akademi University, and Turku University Hospital, Turku, Finland
| | - Jooa Norha
- Turku PET Centre, University of Turku, Åbo Akademi University, and Turku University Hospital, Turku, Finland
| | - Petri Kallio
- Department of Clinical Physiology and Nuclear Medicine, University of Turku and Turku University Hospital, Turku, Finland
- Paavo Nurmi Centre and Unit for Health and Physical Activity, University of Turku, Turku, Finland
| | - Maria Saarenhovi
- Department of Clinical Physiology and Nuclear Medicine, University of Turku and Turku University Hospital, Turku, Finland
| | - Eliisa Löyttyniemi
- Department of Biostatistics, University of Turku and Turku University Hospital, Turku, Finland
| | - Harri Sievänen
- The UKK Institute for Health Promotion Research, Tampere, Finland
| | - Noora Houttu
- Institute of Biomedicine, University of Turku, Turku, Finland
| | - Kirsi Laitinen
- Institute of Biomedicine, University of Turku, Turku, Finland
| | - Kari K Kalliokoski
- Turku PET Centre, University of Turku, Åbo Akademi University, and Turku University Hospital, Turku, Finland
| | - Tommi Vasankari
- The UKK Institute for Health Promotion Research, Tampere, Finland
- Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Juhani Knuuti
- Turku PET Centre, University of Turku, Åbo Akademi University, and Turku University Hospital, Turku, Finland
| | - Ilkka Heinonen
- Turku PET Centre, University of Turku, Åbo Akademi University, and Turku University Hospital, Turku, Finland
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Medina A, Bruno J, Alemán JO. Metabolic flux analysis in adipose tissue reprogramming. IMMUNOMETABOLISM (COBHAM, SURREY) 2024; 6:e00039. [PMID: 38455681 PMCID: PMC10916752 DOI: 10.1097/in9.0000000000000039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/08/2023] [Accepted: 01/29/2024] [Indexed: 03/09/2024]
Abstract
Obesity is a growing epidemic in the United States and worldwide and is associated with insulin resistance and cardiovascular disease, among other comorbidities. Understanding of the pathology that links overnutrition to these disease processes is ongoing. Adipose tissue is a heterogeneous organ comprised of multiple different cell types and it is likely that dysregulated metabolism within these cell populations disrupts both inter- and intracellular interactions and is a key driver of human disease. In recent years, metabolic flux analysis, which offers a precise quantification of metabolic pathway fluxes in biological systems, has emerged as a candidate strategy for uncovering the metabolic changes that stoke these disease processes. In this mini review, we discuss metabolic flux analysis as an experimental tool, with a specific emphasis on mass spectrometry with isotope tracing as this is the technique most frequently used for metabolic flux analysis in adipocytes. Furthermore, we examine existing literature that uses metabolic flux analysis to further our understanding of adipose tissue biology. Our group has a specific interest in understanding the role of white adipose tissue inflammation in the progression of cardiometabolic disease, as we know that in obesity the accumulation of pro-inflammatory adipose tissue macrophages is associated with significant morbidity, so we use this as a paradigm throughout our review for framing the application of these experimental techniques. However, there are many other biological applications to which they can be applied to further understanding of not only adipose tissue biology but also systemic homeostasis.
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Affiliation(s)
- Ashley Medina
- Laboratory of Translational Obesity Research, New York University Grossman School of Medicine, New York, NY, USA
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - Joanne Bruno
- Laboratory of Translational Obesity Research, New York University Grossman School of Medicine, New York, NY, USA
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
| | - José O. Alemán
- Laboratory of Translational Obesity Research, New York University Grossman School of Medicine, New York, NY, USA
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, New York University Grossman School of Medicine, New York, NY, USA
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Cavaliere G, Cimmino F, Trinchese G, Catapano A, Petrella L, D'Angelo M, Lucchin L, Mollica MP. From Obesity-Induced Low-Grade Inflammation to Lipotoxicity and Mitochondrial Dysfunction: Altered Multi-Crosstalk between Adipose Tissue and Metabolically Active Organs. Antioxidants (Basel) 2023; 12:1172. [PMID: 37371902 DOI: 10.3390/antiox12061172] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2023] [Revised: 05/23/2023] [Accepted: 05/27/2023] [Indexed: 06/29/2023] Open
Abstract
Obesity is a major risk factor for several metabolic diseases, including type 2 diabetes, hyperlipidemia, cardiovascular diseases, and brain disorders. Growing evidence suggests the importance of inter-organ metabolic communication for the progression of obesity and the subsequent onset of related disorders. This review provides a broad overview of the pathophysiological processes that from adipose tissue dysfunction leading to altered multi-tissue crosstalk relevant to regulating energy homeostasis and the etiology of obesity. First, a comprehensive description of the role of adipose tissue was reported. Then, attention was turned toward the unhealthy expansion of adipose tissue, low-grade inflammatory state, metabolic inflexibility, and mitochondrial dysfunction as root causes of systemic metabolic alterations. In addition, a short spot was devoted to iron deficiency in obese conditions and the role of the hepcidin-ferroportin relationship in the management of this issue. Finally, different classes of bioactive food components were described with a perspective to enhance their potential preventive and therapeutic use against obesity-related diseases.
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Affiliation(s)
- Gina Cavaliere
- Department of Pharmaceutical Sciences, University of Perugia, 06126 Perugia, Italy
- Centro Servizi Metrologici e Tecnologici Avanzati (CeSMA), Complesso Universitario di Monte Sant'Angelo, 80126 Naples, Italy
| | - Fabiano Cimmino
- Centro Servizi Metrologici e Tecnologici Avanzati (CeSMA), Complesso Universitario di Monte Sant'Angelo, 80126 Naples, Italy
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
| | - Giovanna Trinchese
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
| | - Angela Catapano
- Centro Servizi Metrologici e Tecnologici Avanzati (CeSMA), Complesso Universitario di Monte Sant'Angelo, 80126 Naples, Italy
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
| | - Lidia Petrella
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
| | - Margherita D'Angelo
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
| | - Lucio Lucchin
- Dietetics and Clinical Nutrition, Bolzano Health District, 39100 Bolzano, Italy
| | - Maria Pina Mollica
- Centro Servizi Metrologici e Tecnologici Avanzati (CeSMA), Complesso Universitario di Monte Sant'Angelo, 80126 Naples, Italy
- Department of Biology, University of Naples Federico II, 80126 Naples, Italy
- Task Force on Microbiome Studies, University of Naples Federico II, 80138 Naples, Italy
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Santillana N, Astudillo-Guerrero C, D’Espessailles A, Cruz G. White Adipose Tissue Dysfunction: Pathophysiology and Emergent Measurements. Nutrients 2023; 15:nu15071722. [PMID: 37049561 PMCID: PMC10096946 DOI: 10.3390/nu15071722] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 03/27/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023] Open
Abstract
White adipose tissue (AT) dysfunction plays an important role in the development of cardiometabolic alterations associated with obesity. AT dysfunction is characterized by the loss of the expansion capacity of the AT, an increment in adipocyte hypertrophy, and changes in the secretion profile of adipose cells, associated with accumulation of macrophages and inflammation. Since not all people with an excess of adiposity develop comorbidities, it is necessary to find simple tools that can evidence AT dysfunction and allow the detection of those people with the potential to develop metabolic alterations. This review focuses on the current pathophysiological mechanisms of white AT dysfunction and emerging measurements to assess its functionality.
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Affiliation(s)
- Natalia Santillana
- Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, Santiago 8380453, Chile
| | - Camila Astudillo-Guerrero
- Centro de Neurobiología y Fisiopatología Integrativa (CENFI), Instituto de Fisiología, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso 2360102, Chile
- Programa de Doctorado en Ciencias Mención Neurociencia, Universidad de Valparaíso, Valparaíso 2360102, Chile
| | - Amanda D’Espessailles
- Instituto de Ciencias de la Salud, Universidad de O’Higgins, Rancagua 2820000, Chile
| | - Gonzalo Cruz
- Centro de Neurobiología y Fisiopatología Integrativa (CENFI), Instituto de Fisiología, Facultad de Ciencias, Universidad de Valparaíso, Valparaíso 2360102, Chile
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Di Majo D, Sardo P, Giglia G, Di Liberto V, Zummo FP, Zizzo MG, Caldara GF, Rappa F, Intili G, van Dijk RM, Gallo D, Ferraro G, Gambino G. Correlation of Metabolic Syndrome with Redox Homeostasis Biomarkers: Evidence from High-Fat Diet Model in Wistar Rats. Antioxidants (Basel) 2022; 12:antiox12010089. [PMID: 36670955 PMCID: PMC9854509 DOI: 10.3390/antiox12010089] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2022] [Revised: 12/24/2022] [Accepted: 12/27/2022] [Indexed: 01/03/2023] Open
Abstract
Metabolic Syndrome (MetS) is an extremely complex disease. A non-balanced diet such as high-fat diet (HFD) induces metabolic dysfunction that could modify redox homeostasis. We here aimed at exploring redox homeostasis in male Wistar rats, following 8 weeks of HFD, correlating the eventual modification of selected biomarkers that could be associated with the clinical manifestations of MetS. Therefore, we selected parameters relative to both the glucose tolerance and lipid altered metabolism, but also oxidative pattern. We assessed some biomarkers of oxidative stress i.e., thiols balance, lipid peroxidation and antioxidant barriers, via the use of specific biochemical assays, individuating eventual cross correlation with parameters relative to MetS through a Principal Component Analysis (PCA). The present study shows that 8 weeks of HFD induce MetS in rats, altering glucose and lipid homeostasis and increasing visceral adipose tissue, but also impairing the physiological antioxidant responses that could not counteract the oxidative stress condition. Crucially, cross-correlation analysis suggested that the assessment of specific oxidative stress parameters reported here can provide information comparable to the more widely acquired biomarkers of Mets such as glucose tolerance. Lastly, hepatic steatosis in association with the oxidative stress condition was also highlighted by histological analysis. This research will elucidate the fundamental impact of these oxidative stress parameters on MetS induced in the HFD rat model, tracing paths for developing prevention approaches.
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Affiliation(s)
- Danila Di Majo
- Department of Biomedicine, Neuroscience and Advanced Diagnostics (BIND), University of Palermo, 90127 Palermo, Italy
- Postgraduate School of Nutrition and Food Science, University of Palermo, 90100 Palermo, Italy
| | - Pierangelo Sardo
- Department of Biomedicine, Neuroscience and Advanced Diagnostics (BIND), University of Palermo, 90127 Palermo, Italy
- Postgraduate School of Nutrition and Food Science, University of Palermo, 90100 Palermo, Italy
| | - Giuseppe Giglia
- Department of Biomedicine, Neuroscience and Advanced Diagnostics (BIND), University of Palermo, 90127 Palermo, Italy
- Euro Mediterranean Institute of Science and Technology, I.E.ME.S.T, 90139 Palermo, Italy
| | - Valentina Di Liberto
- Department of Biomedicine, Neuroscience and Advanced Diagnostics (BIND), University of Palermo, 90127 Palermo, Italy
| | - Francesco Paolo Zummo
- Department of Biomedicine, Neuroscience and Advanced Diagnostics (BIND), University of Palermo, 90127 Palermo, Italy
| | - Maria Grazia Zizzo
- Department of Biological, Chemical and Pharmaceutical Sciences and Technologies (STEBICEF), University of Palermo, Viale delle Scienze, 90128 Palermo, Italy
- ATeN (Advanced Technologies Network) Center, Viale delle Scienze, 90128 Palermo, Italy
| | | | - Francesca Rappa
- Department of Biomedicine, Neuroscience and Advanced Diagnostics (BIND), University of Palermo, 90127 Palermo, Italy
| | - Giorgia Intili
- Department of Biomedicine, Neuroscience and Advanced Diagnostics (BIND), University of Palermo, 90127 Palermo, Italy
| | | | - Daniele Gallo
- Department of Biomedicine, Neuroscience and Advanced Diagnostics (BIND), University of Palermo, 90127 Palermo, Italy
| | - Giuseppe Ferraro
- Department of Biomedicine, Neuroscience and Advanced Diagnostics (BIND), University of Palermo, 90127 Palermo, Italy
- Postgraduate School of Nutrition and Food Science, University of Palermo, 90100 Palermo, Italy
| | - Giuditta Gambino
- Department of Biomedicine, Neuroscience and Advanced Diagnostics (BIND), University of Palermo, 90127 Palermo, Italy
- Correspondence: ; Tel./Fax: +39-09123865843
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Glaves A, Díaz-Castro F, Farías J, Ramírez-Romero R, Galgani JE, Fernández-Verdejo R. Association Between Adipose Tissue Characteristics and Metabolic Flexibility in Humans: A Systematic Review. Front Nutr 2021; 8:744187. [PMID: 34926544 PMCID: PMC8678067 DOI: 10.3389/fnut.2021.744187] [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: 07/19/2021] [Accepted: 11/01/2021] [Indexed: 12/23/2022] Open
Abstract
Adipose tissue total amount, distribution, and phenotype influence metabolic health. This may be partially mediated by the metabolic effects that these adipose tissue characteristics exert on the nearby and distant tissues. Thus, adipose tissue may influence the capacity of cells, tissues, and the organism to adapt fuel oxidation to fuel availability, i.e., their metabolic flexibility (MetF). Our aim was to systematically review the evidence for an association between adipose tissue characteristics and MetF in response to metabolic challenges in human adults. We searched in PubMed (last search on September 4, 2021) for reports that measured adipose tissue characteristics (total amount, distribution, and phenotype) and MetF in response to metabolic challenges (as a change in respiratory quotient) in humans aged 18 to <65 years. Any study design was considered, and the risk of bias was assessed with a checklist for randomized and non-randomized studies. From 880 records identified, 22 remained for the analysis, 10 of them measured MetF in response to glucose plus insulin stimulation, nine in response to dietary challenges, and four in response to other challenges. Our main findings were that: (a) MetF to glucose plus insulin stimulation seems inversely associated with adipose tissue total amount, waist circumference, and visceral adipose tissue; and (b) MetF to dietary challenges does not seem associated with adipose tissue total amount or distribution. In conclusion, evidence suggests that adipose tissue may directly or indirectly influence MetF to glucose plus insulin stimulation, an effect probably explained by skeletal muscle insulin sensitivity. Systematic Review Registration: PROSPERO [CRD42020167810].
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Affiliation(s)
- Alice Glaves
- Departamento de Nutrición, Diabetes y Metabolismo, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Francisco Díaz-Castro
- Laboratorio de Investigación en Nutrición y Actividad Física (LABINAF), Instituto de Nutrición y Tecnología de los Alimentos (INTA), Universidad de Chile, Santiago, Chile
| | - Javiera Farías
- Carrera de Nutrición y Dietética, Departamento de Ciencias de la Salud, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Rodrigo Ramírez-Romero
- Carrera de Nutrición y Dietética, Departamento de Ciencias de la Salud, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Jose E Galgani
- Departamento de Nutrición, Diabetes y Metabolismo, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile.,Carrera de Nutrición y Dietética, Departamento de Ciencias de la Salud, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Rodrigo Fernández-Verdejo
- Carrera de Nutrición y Dietética, Departamento de Ciencias de la Salud, Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile.,Laboratorio de Fisiología del Ejercicio y Metabolismo (LABFEM), Escuela de Kinesiología, Facultad de Medicina, Universidad Finis Terrae, Santiago, Chile
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7
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Gudiksen A, Qoqaj A, Ringholm S, Wojtaszewski J, Plomgaard P, Pilegaard H. Ameliorating effects of lifelong physical activity on healthy aging and mitochondrial function in human white adipose tissue. J Gerontol A Biol Sci Med Sci 2021; 77:1101-1111. [PMID: 34875059 DOI: 10.1093/gerona/glab356] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Indexed: 11/12/2022] Open
Abstract
Growing old is patently among the most prominent risk factors for lifestyle related diseases and deterioration in physical performance. Aging in particular affects mitochondrial homeostasis and maintaining a well-functioning mitochondrial pool is imperative in order to avoid age-associated metabolic decline. White adipose tissue (WAT) is a key organ in energy balance and impaired mitochondrial function in adipocytes has been associated with increased low-grade inflammation, altered metabolism, excessive ROS production and an accelerated aging phenotype. Exercise training improves mitochondrial health but whether lifelong exercise training can sufficiently maintain WAT mitochondrial function is currently unknown. Therefore, to dissect the role and dose-dependence of lifelong exercise training on aging WAT metabolic parameters and mitochondrial function, young and older untrained, as well as moderately and highly exercise trained older male subjects were recruited and abdominal subcutaneous (s)WAT biopsies and venous blood samples were obtained to measure mitochondrial function and key metabolic factors in WAT and plasma. Mitochondrial intrinsic respiratory capacity was lower in sWAT from older than in young subjects. In spite of this, maximal mitochondrial respiration per wet weight, markers of oxidative capacity, and mitophagic capacity were increased in sWAT from lifelong highly exercise trained than all other groups. Furthermore, ROS emission was generally lower in sWAT from lifelong highly exercise trained than older untrained subjects. Taken together, aging reduces intrinsic mitochondrial respiration in human sWAT, but lifelong high volume exercise training increases oxidative capacity by increasing mitochondrial volume likely contributing to healthy aging.
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Affiliation(s)
- Anders Gudiksen
- Section for Cell Biology and Physiology, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Albina Qoqaj
- Section for Cell Biology and Physiology, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Stine Ringholm
- Section for Cell Biology and Physiology, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Jørgen Wojtaszewski
- Section of Integrative Physiology, Department of Nutrition, Exercise and Sports, University of Copenhagen, Copenhagen, Denmark
| | - Peter Plomgaard
- Department of Clinical Biochemistry, Centre of Inflammation and Metabolism, and Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark. Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Henriette Pilegaard
- Section for Cell Biology and Physiology, Department of Biology, University of Copenhagen, Copenhagen, Denmark
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Franczyk MP, Qi N, Stromsdorfer KL, Li C, Yamaguchi S, Itoh H, Yoshino M, Sasaki Y, Brookheart RT, Finck BN, DeBosch BJ, Klein S, Yoshino J. Importance of Adipose Tissue NAD+ Biology in Regulating Metabolic Flexibility. Endocrinology 2021; 162:6128705. [PMID: 33543238 PMCID: PMC7853299 DOI: 10.1210/endocr/bqab006] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Indexed: 12/17/2022]
Abstract
Nicotinamide adenine dinucleotide (NAD+) is an essential coenzyme that regulates cellular energy metabolism in many cell types. The major purpose of the present study was to test the hypothesis that NAD+ in white adipose tissue (WAT) is a regulator of whole-body metabolic flexibility in response to changes in insulin sensitivity and with respect to substrate availability and use during feeding and fasting conditions. To this end, we first evaluated the relationship between WAT NAD+ concentration and metabolic flexibility in mice and humans. We found that WAT NAD+ concentration was increased in mice after calorie restriction and exercise, 2 enhancers of metabolic flexibility. Bariatric surgery-induced 20% weight loss increased plasma adiponectin concentration, skeletal muscle insulin sensitivity, and WAT NAD+ concentration in people with obesity. We next analyzed adipocyte-specific nicotinamide phosphoribosyltransferase (Nampt) knockout (ANKO) mice, which have markedly decreased NAD+ concentrations in WAT. ANKO mice oxidized more glucose during the light period and after fasting than control mice. In contrast, the normal postprandial stimulation of glucose oxidation and suppression of fat oxidation were impaired in ANKO mice. Data obtained from RNA-sequencing of WAT suggest that loss of NAMPT increases inflammation, and impairs insulin sensitivity, glucose oxidation, lipolysis, branched-chain amino acid catabolism, and mitochondrial function in WAT, which are features of metabolic inflexibility. These results demonstrate a novel function of WAT NAMPT-mediated NAD+ biosynthesis in regulating whole-body metabolic flexibility, and provide new insights into the role of adipose tissue NAD+ biology in metabolic health.
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Affiliation(s)
- Michael P Franczyk
- Center for Human Nutrition, Washington University School of Medicine, St Louis, Missouri, USA
| | - Nathan Qi
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan, USA
| | - Kelly L Stromsdorfer
- Center for Human Nutrition, Washington University School of Medicine, St Louis, Missouri, USA
| | - Chengcheng Li
- Center for Human Nutrition, Washington University School of Medicine, St Louis, Missouri, USA
| | - Shintaro Yamaguchi
- Center for Human Nutrition, Washington University School of Medicine, St Louis, Missouri, USA
- Division of Endocrinology, Metabolism and Nephrology, Department of Internal Medicine, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - Hiroshi Itoh
- Division of Endocrinology, Metabolism and Nephrology, Department of Internal Medicine, Keio University School of Medicine, Shinjuku-ku, Tokyo, Japan
| | - Mihoko Yoshino
- Center for Human Nutrition, Washington University School of Medicine, St Louis, Missouri, USA
| | - Yo Sasaki
- Department of Genetics, Washington University School of Medicine, St Louis, Missouri, USA
| | - Rita T Brookheart
- Center for Human Nutrition, Washington University School of Medicine, St Louis, Missouri, USA
| | - Brian N Finck
- Center for Human Nutrition, Washington University School of Medicine, St Louis, Missouri, USA
| | - Brian J DeBosch
- Department of Pediatrics, Washington University School of Medicine, St Louis, Missouri, USA
- Department of Cell Biology and Physiology, Washington University School of Medicine, St Louis, Missouri, USA
| | - Samuel Klein
- Center for Human Nutrition, Washington University School of Medicine, St Louis, Missouri, USA
| | - Jun Yoshino
- Center for Human Nutrition, Washington University School of Medicine, St Louis, Missouri, USA
- Department of Developmental Biology, Washington University School of Medicine, St Louis, Missouri, USA
- Correspondence: Jun Yoshino, MD, PhD, Center for Human Nutrition, Division of Geriatrics & Nutritional Science, Washington University School of Medicine, 660 S Euclid Ave, Campus Box 8031, St Louis, MO 63110, USA.
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9
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Petrosino JM, Longenecker JZ, Ramkumar S, Xu X, Dorn LE, Bratasz A, Yu L, Maurya S, Tolstikov V, Bussberg V, Janssen PM, Periasamy M, Kiebish MA, Duester G, von Lintig J, Ziouzenkova O, Accornero F. Paracardial fat remodeling affects systemic metabolism through alcohol dehydrogenase 1. J Clin Invest 2021; 131:141799. [PMID: 33586683 PMCID: PMC7880313 DOI: 10.1172/jci141799] [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] [Received: 06/29/2020] [Accepted: 12/10/2020] [Indexed: 11/17/2022] Open
Abstract
The relationship between adiposity and metabolic health is well established. However, very little is known about the fat depot, known as paracardial fat (pCF), located superior to and surrounding the heart. Here, we show that pCF remodels with aging and a high-fat diet and that the size and function of this depot are controlled by alcohol dehydrogenase 1 (ADH1), an enzyme that oxidizes retinol into retinaldehyde. Elderly individuals and individuals with obesity have low ADH1 expression in pCF, and in mice, genetic ablation of Adh1 is sufficient to drive pCF accumulation, dysfunction, and global impairments in metabolic flexibility. Metabolomics analysis revealed that pCF controlled the levels of circulating metabolites affecting fatty acid biosynthesis. Also, surgical removal of the pCF depot was sufficient to rescue the impairments in cardiometabolic flexibility and fitness observed in Adh1-deficient mice. Furthermore, treatment with retinaldehyde prevented pCF remodeling in these animals. Mechanistically, we found that the ADH1/retinaldehyde pathway works by driving PGC-1α nuclear translocation and promoting mitochondrial fusion and biogenesis in the pCF depot. Together, these data demonstrate that pCF is a critical regulator of cardiometabolic fitness and that retinaldehyde and its generating enzyme ADH1 act as critical regulators of adipocyte remodeling in the pCF depot.
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Affiliation(s)
- Jennifer M. Petrosino
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Jacob Z. Longenecker
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | | | - Xianyao Xu
- Department of Biomedical Engineering, Dorothy M. Davis Heart and Lung Research Institute
| | - Lisa E. Dorn
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | | | - Lianbo Yu
- Center for Biostatistics, Department of Biomedical Informatics, The Ohio State University, Columbus, Ohio, USA
| | - Santosh Maurya
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | | | - Valerie Bussberg
- BERG, Precision Medicine Department, Framingham, Massachusetts, USA
| | - Paul M.L. Janssen
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
| | - Muthu Periasamy
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
- Department of Internal Medicine, University of Central Florida, Orlando, Florida, USA
| | | | - Gregg Duester
- Development, Aging, and Regeneration Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, California, USA
| | - Johannes von Lintig
- Department of Pharmacology, Case Western Reserve University, Cleveland, Ohio, USA
| | - Ouliana Ziouzenkova
- Department of Human Sciences, College of Education and Human Ecology, Comprehensive Cancer Center, The Ohio State University, Columbus, Ohio, USA
| | - Federica Accornero
- Department of Physiology and Cell Biology, Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, Ohio, USA
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10
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Mancilla R, Brouwers B, Schrauwen‐Hinderling VB, Hesselink MKC, Hoeks J, Schrauwen P. Exercise training elicits superior metabolic effects when performed in the afternoon compared to morning in metabolically compromised humans. Physiol Rep 2021; 8:e14669. [PMID: 33356015 PMCID: PMC7757369 DOI: 10.14814/phy2.14669] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 11/13/2020] [Accepted: 11/14/2020] [Indexed: 01/08/2023] Open
Abstract
The circadian clock and metabolism are tightly intertwined. Hence, the specific timing of interventions that target metabolic changes may affect their efficacy. Here we retrospectively compared the metabolic health effects of morning versus afternoon exercise training in metabolically compromised subjects enrolled in a 12-week exercise training program. Thirty-two adult males (58 ± 7 yrs) at risk for or diagnosed with type 2 diabetes performed 12 weeks of supervised exercise training either in the morning (8.00-10.00 a.m., N = 12) or in the afternoon (3.00-6.00 p.m., N = 20). Compared to participants who trained in the morning, participants who trained in the afternoon experienced superior beneficial effects of exercise training on peripheral insulin sensitivity (+5.2 ± 6.4 vs. -0.5 ± 5.4 μmol/min/kgFFM, p = .03), insulin-mediated suppression of adipose tissue lipolysis (-4.5 ± 13.7% vs. +5.9 ± 11%, p = .04), fasting plasma glucose levels (-0.3 ± 1.0 vs. +0.5 ± 0.8 mmol/l, p = .02), exercise performance (+0.40 ± 0.2 vs. +0.2 ± 0.1 W/kg, p = .05) and fat mass (-1.2 ± 1.3 vs. -0.2 ± 1.0 kg, p = .03). In addition, exercise training in the afternoon also tended to elicit superior effects on basal hepatic glucose output (p = .057). Our findings suggest that metabolically compromised subjects may reap more pronounced metabolic benefits from exercise training when this training is performed in the afternoon versus morning. CLINICALTRIALS.GOV ID: NCT01317576.
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Affiliation(s)
- Rodrigo Mancilla
- NUTRIM School of Nutrition and Translational Research in MetabolismMaastricht University Medical CenterMaastrichtThe Netherlands
- Department of Nutrition and Movement SciencesMaastricht University Medical CenterMaastrichtThe Netherlands
| | - Bram Brouwers
- NUTRIM School of Nutrition and Translational Research in MetabolismMaastricht University Medical CenterMaastrichtThe Netherlands
- Department of Nutrition and Movement SciencesMaastricht University Medical CenterMaastrichtThe Netherlands
| | - Vera B. Schrauwen‐Hinderling
- NUTRIM School of Nutrition and Translational Research in MetabolismMaastricht University Medical CenterMaastrichtThe Netherlands
- Department of RadiologyMaastricht University Medical CenterMaastrichtThe Netherlands
| | - Matthijs K. C. Hesselink
- NUTRIM School of Nutrition and Translational Research in MetabolismMaastricht University Medical CenterMaastrichtThe Netherlands
- Department of Nutrition and Movement SciencesMaastricht University Medical CenterMaastrichtThe Netherlands
| | - Joris Hoeks
- NUTRIM School of Nutrition and Translational Research in MetabolismMaastricht University Medical CenterMaastrichtThe Netherlands
- Department of Nutrition and Movement SciencesMaastricht University Medical CenterMaastrichtThe Netherlands
| | - Patrick Schrauwen
- NUTRIM School of Nutrition and Translational Research in MetabolismMaastricht University Medical CenterMaastrichtThe Netherlands
- Department of Nutrition and Movement SciencesMaastricht University Medical CenterMaastrichtThe Netherlands
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11
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Son Y, Cox JM, Stevenson JL, Cooper JA, Paton CM. Angiopoietin-1 protects 3T3-L1 preadipocytes from saturated fatty acid–induced cell death. Nutr Res 2020; 76:20-28. [DOI: 10.1016/j.nutres.2020.02.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2019] [Revised: 12/25/2019] [Accepted: 02/07/2020] [Indexed: 12/14/2022]
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12
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Fechner E, Bilet L, Peters HPF, Hiemstra H, Jacobs DM, Op 't Eyndt C, Kornips E, Mensink RP, Schrauwen P. Effects of a whole diet approach on metabolic flexibility, insulin sensitivity and postprandial glucose responses in overweight and obese adults - A randomized controlled trial. Clin Nutr 2019; 39:2734-2742. [PMID: 31899037 DOI: 10.1016/j.clnu.2019.12.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 11/13/2019] [Accepted: 12/06/2019] [Indexed: 12/31/2022]
Abstract
BACKGROUND & AIMS Metabolic flexibility is the ability to adapt fuel oxidation to fuel availability. Metabolic inflexibility has been associated with obesity, the metabolic syndrome and insulin resistance, and can be improved by exercise or weight loss. Dietary changes can modulate metabolic flexibility; however, the effect of a whole diet approach on metabolic flexibility has never been studied. Therefore, our objective was to assess the effect of a healthy diet (HD), as compared to a typical Western diet (WD), on several fasting and postprandial markers of metabolic flexibility and insulin sensitivity. METHODS In this parallel randomized trial, overweight or obese men and women (50-70 years; BMI 25-35 kg/m2) consumed a healthy diet (HD; high in fruits and vegetables, pulses, fibers, nuts, fatty fish, and low in high-glycemic carbohydrates; n = 19) or a typical Western diet (WD; n = 21) for six weeks, following a two-week run-in period. The change in respiratory quotient upon insulin stimulation (ΔRQ), and insulin sensitivity, expressed as the M-value, were both determined with a hyperinsulinemic euglycemic clamp. Additionally, other fasting and postprandial markers of metabolic flexibility were assessed during a 5-h high-fat high-glycemic mixed meal challenge. RESULTS ΔRQ (p = 0.730) and insulin sensitivity (p = 0.802) were not significantly affected by diet. Postprandial RQ did also not show significant differences (p = 0.610), whereas postprandial glucose excursions were significantly higher in the HD group at T30 (p = 0.014) and T45 (p = 0.026) after mixed meal ingestion (p = 0.037). Fasting glucose (p = 0.530) and HbA1c (p = 0.124) remained unchanged, whereas decreases in fasting insulin (p = 0.038) and the HOMA-IR (p = 0.050) were significantly more pronounced with the HD. CONCLUSION A healthy diet for six weeks, without further life-style changes, did not improve metabolic flexibility and whole-body insulin sensitivity, when compared to a Western-style diet. It remains to be determined whether the short time increase in postprandial glucose is physiologically relevant or detrimental to metabolic health. This trial was registered at clinicaltrials.gov as NCT02519127.
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Affiliation(s)
- Eva Fechner
- Department of Nutrition and Movement Sciences, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands.
| | - Lena Bilet
- Department of Nutrition and Movement Sciences, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands
| | | | - Harry Hiemstra
- Unilever Food Innovation Center, Wageningen, the Netherlands
| | - Doris M Jacobs
- Unilever Food Innovation Center, Wageningen, the Netherlands
| | - Cara Op 't Eyndt
- Department of Nutrition and Movement Sciences, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Esther Kornips
- Department of Nutrition and Movement Sciences, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Ronald P Mensink
- Department of Nutrition and Movement Sciences, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands
| | - Patrick Schrauwen
- Department of Nutrition and Movement Sciences, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Center+, Maastricht, the Netherlands.
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13
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Adipose Tissue Quality in Aging: How Structural and Functional Aspects of Adipose Tissue Impact Skeletal Muscle Quality. Nutrients 2019; 11:nu11112553. [PMID: 31652734 PMCID: PMC6893709 DOI: 10.3390/nu11112553] [Citation(s) in RCA: 50] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 10/19/2019] [Accepted: 10/21/2019] [Indexed: 12/20/2022] Open
Abstract
The interplay between adipose tissue and skeletal muscle and the impact on mobility and aging remain enigmatic. The progressive decline in mobility promoted by aging has been previously attributed to the loss of skeletal mass and function and more recently linked to changes in body fat composition and quantity. Regardless of body size, visceral and intermuscular adipose depots increase with aging and are associated with adverse health outcomes. However, the quality of adipose tissue, in particular abdominal subcutaneous as it is the largest depot, likely plays a significant role in aging outcomes, such as mobility decline, though its communication with other tissues such as skeletal muscle. In this review, we discuss the age-associated development of a pro-inflammatory profile, cellular senescence, and metabolic inflexibility in abdominal subcutaneous adipose tissue. Collectively, these facets of adipose tissue quality influence its secretory profile and crosstalk with skeletal muscle and likely contribute to the development of muscle atrophy and disability. Therefore, the identification of the key structural and functional components of adipose tissue quality—including necrosis, senescence, inflammation, self-renewal, metabolic flexibility—and adipose tissue-secreted proteins that influence mobility via direct effects on skeletal muscle are necessary to prevent morbidity/mortality in the aging population.
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14
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Allerton TD, Irving BA, Spielmann G, Primeaux S, Landin D, Nelson A, Johannsen NM. Metabolic flexibility is impaired in response to acute exercise in the young offspring of mothers with type 2 diabetes. Physiol Rep 2019; 7:e14189. [PMID: 31496022 PMCID: PMC6732566 DOI: 10.14814/phy2.14189] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2019] [Revised: 06/26/2019] [Accepted: 06/26/2019] [Indexed: 11/24/2022] Open
Abstract
We assessed metabolic flexibility (MF) via a mixed meal in a group of young, healthy participants with a positive family history of maternal type 2 diabetes (T2D) (FH+) and those without a family history of T2D (FH-) under three distinct conditions; baseline (BL; no previous exercise), 1-h post high intensity interval exercise (1H), and 48-h post exercise recovery. On separate visits, participants completed a single bout of high intensity interval exercise (HIIE) and repeated the MMTT 1-h (1H) and 48 h (48H) postexercise. FH+ participants were not able to suppress fat oxidation 1-h post exercise (1H) as effectively as FH- participants were, however, this response was improved when measured at the 48H visit. Insulin AUC was significantly lowered at both 1H and 48H when compared to the BL visit. Serum NEFA AUC was elevated 1-h post exercise, when compared to BL, but was significantly reduced at the 48H visit. Young, healthy participants with a maternal history of T2D demonstrate impaired MF (related to the inability to suppress fat oxidation) in response to acute HIIE (1H) that was improved 48H. The overall effect of HIIE showed improved insulin AUC and NEFA AUC up to 48H post that did not differ by FH.
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Affiliation(s)
| | - Brian A. Irving
- School of KinesiologyLouisiana State UniversityBaton RougeLouisiana
- Human GenomicsPennington Biomedical Research CenterBaton RougeLouisiana
| | - Guillaume Spielmann
- School of KinesiologyLouisiana State UniversityBaton RougeLouisiana
- Human GenomicsPennington Biomedical Research CenterBaton RougeLouisiana
| | - Stefany Primeaux
- Department of PhysiologyLouisiana State University Health Science CenterNew OrleansLouisiana
| | - Dennis Landin
- School of KinesiologyLouisiana State UniversityBaton RougeLouisiana
| | - Arnold Nelson
- School of KinesiologyLouisiana State UniversityBaton RougeLouisiana
| | - Neil M. Johannsen
- School of KinesiologyLouisiana State UniversityBaton RougeLouisiana
- Preventative MedicinePennington Biomedical Research CenterBaton RougeLouisiana
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15
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Shi W, Hegeman MA, Doncheva A, van der Stelt I, Bekkenkamp‐Grovenstein M, van Schothorst EM, Brenner C, de Boer VCJ, Keijer J. Transcriptional Response of White Adipose Tissue to Withdrawal of Vitamin B3. Mol Nutr Food Res 2019; 63:e1801100. [PMID: 30990964 PMCID: PMC6618275 DOI: 10.1002/mnfr.201801100] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Revised: 03/11/2019] [Indexed: 01/24/2023]
Abstract
SCOPE Distinct markers for mild vitamin B3 deficiency are lacking. To identify these, the molecular responses of white adipose tissue (WAT) to vitamin B3 withdrawal are examined. METHODS AND RESULTS A dietary intervention is performed in male C57BL/6JRccHsd mice, in which a diet without nicotinamide riboside (NR) is compared to a diet with NR at the recommended vitamin B3 level. Both diets contain low but adequate level of tryptophan. Metabolic flexibility and systemic glucose tolerance are analyzed and global transcriptomics, qRT-PCR, and histology of epididymal WAT (eWAT) are performed. A decreased insulin sensitivity and a shift from carbohydrate to fatty acid oxidation in response to vitamin B3 withdrawal are observed. This is consistent with molecular changes in eWAT, including an activated MEK/ERK signaling, a lowering of glucose utilization markers, and an increase in makers of fatty acid catabolism, possibly related to the consistent lower expression of mitochondrial electron transport complexes. The synthesis pathway of tetrahydropteridine (BH4), an essential cofactor for neurotransmitter synthesis, is transcriptionally activated. Genes marking these processes are technically validated. CONCLUSION The downregulation of Anp32a, Tnk2 and the upregulation of Mapk1, Map2k1, Qdpr, Mthfs, and Mthfsl are proposed as a WAT transcriptional signature marker for mild vitamin B3 deficiency.
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Affiliation(s)
- Wenbiao Shi
- Human and Animal PhysiologyWageningen UniversityPO Box 3386700AHWageningenThe Netherlands
| | - Maria A. Hegeman
- Human and Animal PhysiologyWageningen UniversityPO Box 3386700AHWageningenThe Netherlands
- Educational Consultancy & Professional DevelopmentFaculty of Social and Behavioural Sciences, Utrecht University3584CSUtrechtThe Netherlands
| | - Atanaska Doncheva
- Human and Animal PhysiologyWageningen UniversityPO Box 3386700AHWageningenThe Netherlands
| | - Inge van der Stelt
- Human and Animal PhysiologyWageningen UniversityPO Box 3386700AHWageningenThe Netherlands
| | | | | | - Charles Brenner
- Department of BiochemistryCarver College of Medicine, University of IowaIowa CityIA52242USA
| | - Vincent C. J. de Boer
- Human and Animal PhysiologyWageningen UniversityPO Box 3386700AHWageningenThe Netherlands
| | - Jaap Keijer
- Human and Animal PhysiologyWageningen UniversityPO Box 3386700AHWageningenThe Netherlands
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16
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Immunometabolic Links between Estrogen, Adipose Tissue and Female Reproductive Metabolism. BIOLOGY 2019; 8:biology8010008. [PMID: 30736459 PMCID: PMC6466614 DOI: 10.3390/biology8010008] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Revised: 01/26/2019] [Accepted: 02/03/2019] [Indexed: 12/25/2022]
Abstract
The current knowledge of sex-dependent differences in adipose tissue biology remains in its infancy and is motivated in part by the desire to understand why menopause is linked to an increased risk of metabolic disease. However, the development and characterization of targeted genetically-modified rodent models are shedding new light on the physiological actions of sex hormones in healthy reproductive metabolism. In this review we consider the need for differentially regulating metabolic flexibility, energy balance, and immunity in a sex-dependent manner. We discuss the recent advances in our understanding of physiological roles of systemic estrogen in regulating sex-dependent adipose tissue distribution, form and function; and in sex-dependent healthy immune function. We also review the decline in protective properties of estrogen signaling in pathophysiological settings such as obesity-related metaflammation and metabolic disease. It is clear that the many physiological actions of estrogen on energy balance, immunity, and immunometabolism together with its dynamic regulation in females make it an excellent candidate for regulating metabolic flexibility in the context of reproductive metabolism.
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17
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Fernández-Calleja JMS, Bouwman LMS, Swarts HJM, Oosting A, Keijer J, van Schothorst EM. Direct and Long-Term Metabolic Consequences of Lowly vs. Highly-Digestible Starch in the Early Post-Weaning Diet of Mice. Nutrients 2018; 10:E1788. [PMID: 30453616 PMCID: PMC6265974 DOI: 10.3390/nu10111788] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/09/2018] [Accepted: 11/14/2018] [Indexed: 01/26/2023] Open
Abstract
Starches of low and high digestibility have different metabolic effects. Here, we examined whether this gives differential metabolic programming when fed in the immediate post-weaning period. Chow-fed mice were time-mated, and their nests were standardized and cross-fostered at postnatal days 1⁻2. After postnatal week (PW) 3, individually housed female and male offspring were switched to a lowly-digestible (LDD) or highly-digestible starch diet (HDD) for three weeks. All of the mice received the same high-fat diet (HFD) for nine weeks thereafter. Energy and substrate metabolism and carbohydrate fermentation were studied at the end of the HDD/LDD and HFD periods by extended indirect calorimetry. Glucose tolerance (PW 11) and metabolic flexibility (PW14) were analyzed. Directly in response to the LDD versus the HDD, females showed smaller adipocytes with less crown-like structures in gonadal white adipose tissue, while males had a lower fat mass and higher whole body fat oxidation levels. Both LDD-fed females and males showed an enlarged intestinal tract. Although most of the phenotypical differences disappeared in adulthood in both sexes, females exposed to LDD versus HDD in the early post-weaning period showed improved metabolic flexibility in adulthood. Cumulatively, these results suggest that the type of starch introduced after weaning could, at least in females, program later-life health.
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Affiliation(s)
| | - Lianne M S Bouwman
- Human and Animal Physiology, Wageningen University, De Elst 1, Wageningen 6708 WD, The Netherlands.
| | - Hans J M Swarts
- Human and Animal Physiology, Wageningen University, De Elst 1, Wageningen 6708 WD, The Netherlands.
| | - Annemarie Oosting
- Danone Nutricia Research, Uppsalalaan 12, Utrecht 3584 CT, The Netherlands.
| | - Jaap Keijer
- Human and Animal Physiology, Wageningen University, De Elst 1, Wageningen 6708 WD, The Netherlands.
| | - Evert M van Schothorst
- Human and Animal Physiology, Wageningen University, De Elst 1, Wageningen 6708 WD, The Netherlands.
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18
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Corbin KD, Driscoll KA, Pratley RE, Smith SR, Maahs DM, Mayer-Davis EJ. Obesity in Type 1 Diabetes: Pathophysiology, Clinical Impact, and Mechanisms. Endocr Rev 2018; 39:629-663. [PMID: 30060120 DOI: 10.1210/er.2017-00191] [Citation(s) in RCA: 137] [Impact Index Per Article: 22.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Accepted: 06/21/2018] [Indexed: 02/07/2023]
Abstract
There has been an alarming increase in the prevalence of obesity in people with type 1 diabetes in recent years. Although obesity has long been recognized as a major risk factor for the development of type 2 diabetes and a catalyst for complications, much less is known about the role of obesity in the initiation and pathogenesis of type 1 diabetes. Emerging evidence suggests that obesity contributes to insulin resistance, dyslipidemia, and cardiometabolic complications in type 1 diabetes. Unique therapeutic strategies may be required to address these comorbidities within the context of intensive insulin therapy, which promotes weight gain. There is an urgent need for clinical guidelines for the prevention and management of obesity in type 1 diabetes. The development of these recommendations will require a transdisciplinary research strategy addressing metabolism, molecular mechanisms, lifestyle, neuropsychology, and novel therapeutics. In this review, the prevalence, clinical impact, energy balance physiology, and potential mechanisms of obesity in type 1 diabetes are described, with a special focus on the substantial gaps in knowledge in this field. Our goal is to provide a framework for the evidence base needed to develop type 1 diabetes-specific weight management recommendations that account for the competing outcomes of glycemic control and weight management.
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Affiliation(s)
- Karen D Corbin
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Orlando, Florida
| | - Kimberly A Driscoll
- Department of Pediatrics, School of Medicine, University of Colorado Denver, Aurora, Colorado.,Barbara Davis Center for Diabetes, Aurora, Colorado
| | - Richard E Pratley
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Orlando, Florida
| | - Steven R Smith
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Orlando, Florida
| | - David M Maahs
- Division of Pediatric Endocrinology, Department of Pediatrics, Stanford University, Stanford, California
| | - Elizabeth J Mayer-Davis
- Department of Nutrition, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina.,Department of Medicine, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina
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19
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Tareen SHK, Kutmon M, Adriaens ME, Mariman ECM, de Kok TM, Arts ICW, Evelo CT. Exploring the cellular network of metabolic flexibility in the adipose tissue. GENES AND NUTRITION 2018; 13:17. [PMID: 30002738 PMCID: PMC6034334 DOI: 10.1186/s12263-018-0609-3] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2018] [Accepted: 06/18/2018] [Indexed: 12/17/2022]
Abstract
Background Metabolic flexibility is the ability of cells to change substrates for energy production based on the nutrient availability and energy requirement. It has been shown that metabolic flexibility is impaired in obesity and chronic diseases such as type 2 diabetes mellitus, cardiovascular diseases, and metabolic syndrome, although, whether it is a cause or an effect of these conditions remains to be elucidated. Main body In this paper, we have reviewed the literature on metabolic flexibility and curated pathways and processes resulting in a network resource to investigate the interplay between these processes in the subcutaneous adipose tissue. The adipose tissue has been shown to be responsible, not only for energy storage but also for maintaining energy homeostasis through oxidation of glucose and fatty acids. We highlight the role of pyruvate dehydrogenase complex–pyruvate dehydrogenase kinase (PDC-PDK) interaction as a regulatory switch which is primarily responsible for changing substrates in energy metabolism from glucose to fatty acids and back. Baseline gene expression of the subcutaneous adipose tissue, along with a publicly available obesity data set, are visualised on the cellular network of metabolic flexibility to highlight the genes that are expressed and which are differentially affected in obesity. Conclusion We have constructed an abstracted network covering glucose and fatty acid oxidation, as well as the PDC-PDK regulatory switch. In addition, we have shown how the network can be used for data visualisation and as a resource for follow-up studies. Electronic supplementary material The online version of this article (10.1186/s12263-018-0609-3) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Samar H K Tareen
- 1Maastricht Centre for Systems Biology (MaCSBio), Maastricht University, Maastricht, the Netherlands
| | - Martina Kutmon
- 1Maastricht Centre for Systems Biology (MaCSBio), Maastricht University, Maastricht, the Netherlands.,2Department of Bioinformatics - BiGCaT, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, the Netherlands
| | - Michiel E Adriaens
- 1Maastricht Centre for Systems Biology (MaCSBio), Maastricht University, Maastricht, the Netherlands
| | - Edwin C M Mariman
- 3Department of Human Biology, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, the Netherlands
| | - Theo M de Kok
- 1Maastricht Centre for Systems Biology (MaCSBio), Maastricht University, Maastricht, the Netherlands.,4Department of Toxicogenomics, GROW School of Oncology and Developmental Biology, Maastricht University, Maastricht, the Netherlands
| | - Ilja C W Arts
- 1Maastricht Centre for Systems Biology (MaCSBio), Maastricht University, Maastricht, the Netherlands.,5Department of Epidemiology, CARIM School for Cardiovascular Diseases, Maastricht University, Maastricht, the Netherlands
| | - Chris T Evelo
- 1Maastricht Centre for Systems Biology (MaCSBio), Maastricht University, Maastricht, the Netherlands.,2Department of Bioinformatics - BiGCaT, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University, Maastricht, the Netherlands
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20
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Ryan AS, Ortmeyer HK. Insulin suppression of fatty acid skeletal muscle enzyme activity in postmenopausal women, and improvements in metabolic flexibility and lipoprotein lipase with aerobic exercise and weight loss. Int J Obes (Lond) 2018; 43:276-284. [PMID: 29907844 DOI: 10.1038/s41366-018-0068-3] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Revised: 01/25/2018] [Accepted: 02/14/2018] [Indexed: 12/29/2022]
Abstract
BACKGROUND Obesity and insulin resistance are characterized by metabolic inflexibility, a condition described as an inability to switch from fat oxidation during fasting to carbohydrate oxidation during hyperinsulinemia. The purpose of this study was to examine predictors of metabolic flexibility in 103 obese (37-59% fat), sedentary (VO2max: 19.4 ± 0.5 ml/kg/min), postmenopausal (45-76 years) women, and changes in metabolic flexibility with exercise and weight loss interventions. METHODS Insulin sensitivity (M) and metabolic flexibility via an 80 mU/m2/min hyperinsulinemic-euglycemic clamp, VO2max, and body composition were measured. Metabolic flexibility was measured after 6-months aerobic training + weight loss (AEX + WL: n = 43) or weight loss (WL: n = 31). Basal and insulin-stimulated vastus lateralis skeletal muscle samples were available from a subset of these women (n = 45). RESULTS Metabolic flexibility correlated inversely with glucose120 min of OGTT, fasting insulin, and the percent change (insulin-basal) in lipoprotein lipase (LPL) activity and positively with M, but not with VO2max, total body fat, visceral fat, or subcutaneous abdominal fat. Skeletal muscle acyl-CoA synthase and citrate synthase activities decreased during hyperinsulinemia. Metabolic flexibility increased after AEX + WL but not WL, and the percent change in metabolic flexibility was inversely related to the percent change in insulin's effect on LPL activity. CONCLUSION Metabolic flexibility is related to insulin sensitivity and insulin's action on LPL. Furthermore, metabolic flexibility and insulin suppression of skeletal muscle LPL activity increase with AEX + WL in overweight and obese, sedentary older women.
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Affiliation(s)
- Alice S Ryan
- VA Research Service, VA Maryland Health Care System, Baltimore, MD, 21201, USA. .,Department of Medicine, Division of Gerontology and Geriatric Medicine at the University of Maryland School of Medicine, Baltimore, MD, 21201, USA. .,Baltimore VA, GRECC, Baltimore, MD, 21201, USA.
| | - Heidi K Ortmeyer
- VA Research Service, VA Maryland Health Care System, Baltimore, MD, 21201, USA.,Department of Medicine, Division of Gerontology and Geriatric Medicine at the University of Maryland School of Medicine, Baltimore, MD, 21201, USA.,Baltimore VA, GRECC, Baltimore, MD, 21201, USA
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21
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Shi W, Hegeman MA, van Dartel DA, Tang J, Suarez M, Swarts H, van der Hee B, Arola L, Keijer J. Effects of a wide range of dietary nicotinamide riboside (NR) concentrations on metabolic flexibility and white adipose tissue (WAT) of mice fed a mildly obesogenic diet. Mol Nutr Food Res 2017; 61:1600878. [PMID: 28211258 PMCID: PMC5573990 DOI: 10.1002/mnfr.201600878] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2016] [Revised: 12/29/2016] [Accepted: 01/23/2017] [Indexed: 02/02/2023]
Abstract
SCOPE Metabolic flexibility is the ability to switch metabolism between carbohydrate oxidation (CHO) and fatty acid oxidation (FAO) and is a biomarker for metabolic health. The effect on metabolic health of nicotinamide riboside (NR) as an exclusive source of vitamin B3 is unknown and is examined here for a wide range of NR. DESIGN AND METHODS Nine-week-old male C57BL/6JRcc mice received a semi-purified mildly obesogenic (40 en% fat) diet containing 0.14% L-tryptophan and either 5, 15, 30, 180, or 900 mg NR per kg diet for 15 weeks. Body composition and metabolic parameters were analyzed. Metabolic flexibility was measured using indirect calorimetry. Gene expression in epididymal white adipose tissue (eWAT) was measured using qRT-PCR . RESULTS The maximum delta respiratory exchange ratio when switching from CHO to FAO (maxΔRERCHO1→FAO ) and when switching from FAO to CHO (maxΔRERFAO→CHO2 ) were largest in 30 mg NR per kg diet (30NR). In eWAT, the gene expression of Pparγ, a master regulator of adipogenesis, and of Sod2 and Prdx3, two antioxidant genes, were significantly upregulated in 30NR compared to 5NR. CONCLUSION 30NR is most beneficial for metabolic health, in terms of metabolic flexibility and eWAT gene expression, of mice on an obesogenic diet.
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Affiliation(s)
- Wenbiao Shi
- Human and Animal PhysiologyWageningen UniversityWageningenThe Netherlands
| | - Maria A. Hegeman
- Human and Animal PhysiologyWageningen UniversityWageningenThe Netherlands
| | | | - Jing Tang
- Human and Animal PhysiologyWageningen UniversityWageningenThe Netherlands
- Institute of Animal SciencesChinese Academy of Agricultural Sciences (CAAS)BeijingChina
| | - Manuel Suarez
- Department of Biochemistry and BiotechnologyUniversity Rovira VirgiliTarragonaSpain
| | - Hans Swarts
- Human and Animal PhysiologyWageningen UniversityWageningenThe Netherlands
| | - Bart van der Hee
- Human and Animal PhysiologyWageningen UniversityWageningenThe Netherlands
| | - Lluis Arola
- Department of Biochemistry and BiotechnologyUniversity Rovira VirgiliTarragonaSpain
- Nutrition and Health Research GroupTechnological Center of Nutrition and Health (CTNS)ReusSpain
| | - Jaap Keijer
- Human and Animal PhysiologyWageningen UniversityWageningenThe Netherlands
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22
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Rynders CA, Blanc S, DeJong N, Bessesen DH, Bergouignan A. Sedentary behaviour is a key determinant of metabolic inflexibility. J Physiol 2017; 596:1319-1330. [PMID: 28543022 DOI: 10.1113/jp273282] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 05/22/2017] [Indexed: 01/14/2023] Open
Abstract
Metabolic flexibility is defined as the ability to adapt substrate oxidation rates in response to changes in fuel availability. The inability to switch between the oxidation of lipid and carbohydrate appears to be an important feature of chronic disorders such as obesity and type 2 diabetes. Laboratory assessment of metabolic flexibility has traditionally involved measurement of the respiratory quotient (RQ) by indirect calorimetry during the fasted to fed transition (e.g. mixed meal challenge) or during a hyperinsulinaemic-euglycaemic clamp. Under these controlled experimental conditions, 'metabolic inflexibility' is characterized by lower fasting fat oxidation (higher fasting RQ) and/or an impaired ability to oxidize carbohydrate during feeding or insulin-stimulated conditions (lower postprandial or clamp RQ). This experimental paradigm has provided fundamental information regarding the role of substrate oxidation in the development of obesity and insulin resistance. However, the key determinants of metabolic flexibility among relevant clinical populations remain unclear. Herein, we propose that habitual physical activity levels are a primary determinant of metabolic flexibility. We present evidence demonstrating that high levels of physical activity predict metabolic flexibility, while physical inactivity and sedentary behaviours trigger a state of metabolic 'inflexibility', even among individuals who meet physical activity recommendations. Furthermore, we describe alternative experimental approaches to studying the concept of metabolic flexibility across a range of activity and inactivity. Finally, we address the promising use of strategies that aim to reduce sedentary behaviours as therapy to improve metabolic flexibility and reduce weight gain risk.
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Affiliation(s)
- Corey A Rynders
- Division of Geriatric Medicine, University of Colorado, School of Medicine, Aurora, CO, USA
| | - Stephane Blanc
- Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, CNRS, Strasbourg, France.,UMR 7178 Centre National de la Recherche Scientifique (CNRS), Strasbourg, France
| | - Nathan DeJong
- Division of Endocrinology, Metabolism and Diabetes and Anschutz Health and Wellness Center, University of Colorado, School of Medicine, Aurora, CO, USA
| | - Daniel H Bessesen
- Division of Endocrinology, Metabolism and Diabetes and Anschutz Health and Wellness Center, University of Colorado, School of Medicine, Aurora, CO, USA.,Denver Health Medical Center, Denver, CO, USA
| | - Audrey Bergouignan
- Institut Pluridisciplinaire Hubert Curien, Université de Strasbourg, CNRS, Strasbourg, France.,UMR 7178 Centre National de la Recherche Scientifique (CNRS), Strasbourg, France.,Division of Endocrinology, Metabolism and Diabetes and Anschutz Health and Wellness Center, University of Colorado, School of Medicine, Aurora, CO, USA
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23
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Goodpaster BH, Sparks LM. Metabolic Flexibility in Health and Disease. Cell Metab 2017; 25:1027-1036. [PMID: 28467922 PMCID: PMC5513193 DOI: 10.1016/j.cmet.2017.04.015] [Citation(s) in RCA: 533] [Impact Index Per Article: 76.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Revised: 04/07/2017] [Accepted: 04/14/2017] [Indexed: 02/07/2023]
Abstract
Metabolic flexibility is the ability to respond or adapt to conditional changes in metabolic demand. This broad concept has been propagated to explain insulin resistance and mechanisms governing fuel selection between glucose and fatty acids, highlighting the metabolic inflexibility of obesity and type 2 diabetes. In parallel, contemporary exercise physiology research has helped to identify potential mechanisms underlying altered fuel metabolism in obesity and diabetes. Advances in "omics" technologies have further stimulated additional basic and clinical-translational research to further interrogate mechanisms for improved metabolic flexibility in skeletal muscle and adipose tissue with the goal of preventing and treating metabolic disease.
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Affiliation(s)
- Bret H Goodpaster
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Sanford Burnham Prebys Medical Discovery Institute, 301 East Princeton Street, Orlando, FL 32804, USA.
| | - Lauren M Sparks
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Sanford Burnham Prebys Medical Discovery Institute, 301 East Princeton Street, Orlando, FL 32804, USA
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24
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Postprandial changes in glucose oxidation and insulin sensitivity in metabolic syndrome: Influence of fibroblast growth factor 21 and vitamin D status. Nutrition 2017; 37:37-42. [DOI: 10.1016/j.nut.2016.12.007] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2016] [Accepted: 12/18/2016] [Indexed: 01/28/2023]
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25
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Bajpeyi S, Pasarica M, Conley KE, Newcomer BR, Jubrias SA, Gamboa C, Murray K, Sereda O, Sparks LM, Smith SR. Pioglitazone-induced improvements in insulin sensitivity occur without concomitant changes in muscle mitochondrial function. Metabolism 2017; 69:24-32. [PMID: 28285649 DOI: 10.1016/j.metabol.2016.11.016] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Revised: 11/19/2016] [Accepted: 11/29/2016] [Indexed: 12/16/2022]
Abstract
AIMS Pioglitazone (Pio) is known to improve insulin sensitivity in skeletal muscle. However, the role of Pio in skeletal muscle lipid metabolism and skeletal muscle oxidative capacity is not clear. The aim of this study was to determine the effects of chronic Pio treatment on skeletal muscle mitochondrial activity in individuals with type 2 diabetes (T2D). MATERIALS AND METHODS Twenty-four participants with T2D (13M/11F 53.38±2.1years; BMI 36.47±1.1kg/m2) were randomized to either a placebo (CON, n=8) or a pioglitazone (PIO, n=16) group. Following 12weeks of treatment, we measured insulin sensitivity by hyperinsulinemic-euglycemic clamp (clamp), metabolic flexibility by calculating the change in respiratory quotient (ΔRQ) during the steady state of the clamp, intra- and extra-myocellular lipid content (IMCL and EMCL, respectively) by 1H magnetic resonance spectroscopy (1H-MRS) and muscle maximal ATP synthetic capacity (ATPmax) by 31P-MRS. RESULTS Following 12weeks of PIO treatment, insulin sensitivity (p<0.0005 vs. baseline) and metabolic flexibility (p<0.05 vs. CON) significantly increased. PIO treatment significantly decreased IMCL content and increased EMCL content in gastrocnemius, soleus and tibialis anterior muscles. ATPmax was unaffected by PIO treatment. CONCLUSIONS These results suggest that 12weeks of pioglitazone treatment improves insulin sensitivity, metabolic flexibility and myocellular lipid distribution without any effect on maximal ATP synthetic capacity in skeletal muscle. Consequently, pioglitazone-induced enhancements in insulin responsiveness and fuel utilization are independent of mitochondrial function.
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Affiliation(s)
- Sudip Bajpeyi
- Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA 70808, USA; Department of Kinesiology, University of Texas in El Paso, 500 University Ave, El Paso, TX 79968, USA
| | - Magdalena Pasarica
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Orlando, FL 32804, USA
| | - Kevin E Conley
- Department of Radiology, University of Washington Medical Center, 1959 NE Pacific St, Seattle, WA 98195, USA
| | - Bradley R Newcomer
- Department of Clinical and Diagnostic Sciences, University of Alabama at Birmingham, Birmingham, AL 35294, USA
| | - Sharon A Jubrias
- Department of Radiology, University of Washington Medical Center, 1959 NE Pacific St, Seattle, WA 98195, USA
| | - Cecilia Gamboa
- Department of Kinesiology, University of Texas in El Paso, 500 University Ave, El Paso, TX 79968, USA
| | - Kori Murray
- Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA 70808, USA
| | - Olga Sereda
- Pennington Biomedical Research Center, 6400 Perkins Road, Baton Rouge, LA 70808, USA
| | - Lauren M Sparks
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Orlando, FL 32804, USA; Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL 32827, USA
| | - Steven R Smith
- Translational Research Institute for Metabolism and Diabetes, Florida Hospital, Orlando, FL 32804, USA; Sanford Burnham Prebys Medical Discovery Institute, Orlando, FL 32827, USA.
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26
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Peterson CM, Zhang B, Johannsen DL, Ravussin E. Eight weeks of overfeeding alters substrate partitioning without affecting metabolic flexibility in men. Int J Obes (Lond) 2017; 41:887-893. [PMID: 28262678 PMCID: PMC5461218 DOI: 10.1038/ijo.2017.58] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2016] [Revised: 01/24/2017] [Accepted: 02/18/2017] [Indexed: 01/07/2023]
Abstract
Background/Objective Impairments in metabolic flexibility and substrate handling are associated with metabolic syndrome. However, it is unknown whether metabolic inflexibility causes insulin resistance. We therefore measured metabolic flexibility and substrate handling before and after 8 weeks of overfeeding in initially healthy adults, as a model of the early stages of insulin resistance. Subjects/Methods Twenty-nine healthy men (27 ± 5 years old; BMI 25.5 ± 2.3 kg/m2) were overfed by 40% above baseline energy requirements for 8 weeks and gained 7.6 ± 2.1 kg of weight. Before and after overfeeding, energy expenditure, substrate oxidation, and metabolic flexibility were measured in 2 ways: a) during 1 day of eucaloric feeding in a whole-room indirect calorimeter, and b) during a two-step hyperinsulinemic-euglycemic clamp. Results Eight weeks of overfeeding decreased insulin sensitivity at low and high doses of insulin (p=0.001 and p=0.06, respectively). This was accompanied by decreases in the respiratory quotient (RQ) while sleeping (0.877 ± 0.020 to 0.864 ± 0.026; p=0.05) and at low insulin levels during the clamp (0.927 ± 0.047 to 0.907 ± 0.032; p=0.01). Overfeeding did not affect metabolic flexibility as measured during a clamp (p≥0.17), but it tended to increase 24-hour metabolic flexibility (awake – sleep RQ) as measured by chamber by 0.010 ± 0.028 (p=0.08). In terms of substrate oxidation, overfeeding increased protein oxidation (13 ± 23 g/day; p=0.003) and tended to increase fat oxidation (6 ± 16 g/day; p=0.07), but did not affect carbohydrate oxidation (p=0.64). Individuals with greater metabolic adaptation to overfeeding had higher carbohydrate oxidation rates (r=0.66, p=8×10−5) but not fat oxidation rates (p=0.09). Conclusions The early stages of insulin resistance are accompanied by modest declines in the RQs during sleep and during a clamp, with no changes in fasting RQ or signs of metabolic inflexibility. Our data therefore suggest that metabolic inflexibility does not cause insulin resistance.
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Affiliation(s)
- C M Peterson
- Human Translational Physiology, Pennington Biomedical Research Center, Baton Rouge, LA, USA.,Department of Nutrition Sciences, University of Alabama at Birmingham, Birmingham, AL, USA
| | - B Zhang
- Human Translational Physiology, Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - D L Johannsen
- Human Translational Physiology, Pennington Biomedical Research Center, Baton Rouge, LA, USA
| | - E Ravussin
- Human Translational Physiology, Pennington Biomedical Research Center, Baton Rouge, LA, USA
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27
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Gribok A, Leger JL, Stevens M, Hoyt R, Buller M, Rumpler W. Measuring the short-term substrate utilization response to high-carbohydrate and high-fat meals in the whole-body indirect calorimeter. Physiol Rep 2016; 4:4/12/e12835. [PMID: 27354539 PMCID: PMC4923235 DOI: 10.14814/phy2.12835] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 05/26/2016] [Indexed: 01/24/2023] Open
Abstract
The paper demonstrates that minute‐to‐minute metabolic response to meals with different macronutrient content can be measured and discerned in the whole‐body indirect calorimeter. The ability to discriminate between high‐carbohydrate and high‐fat meals is achieved by applying a modified regularization technique with additional constraints imposed on oxygen consumption rate. These additional constraints reduce the differences in accuracy between the oxygen and carbon dioxide analyzers. The modified technique was applied to 63 calorimeter sessions that were each 24 h long. The data were collected from 16 healthy volunteers (eight males, eight females, aged 22–35 years). Each volunteer performed four 24‐h long calorimeter sessions. At each session, they received one of four treatment combinations involving exercise (high or low intensity) and diet (a high‐fat or high‐carbohydrate shake for lunch). One volunteer did not complete all four assignments, which brought the total number of sessions to 63 instead of 64. During the 24‐h stay in the calorimeter, subjects wore a continuous glucose monitoring system, which was used as a benchmark for subject's postprandial glycemic response. The minute‐by‐minute respiratory exchange ratio (RER) data showed excellent agreement with concurrent subcutaneous glucose concentrations in postprandial state. The averaged minute‐to‐minute RER response to the high‐carbohydrate shake was significantly different from the response to high‐fat shake. Also, postprandial RER slopes were significantly different for two dietary treatments. The results show that whole‐body respiration calorimeters can be utilized as tools to study short‐term kinetics of substrate oxidation in humans.
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Affiliation(s)
- Andrei Gribok
- Food Components and Health Laboratory, Beltsville Human Nutrition Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland
| | - Jayme L Leger
- Food Components and Health Laboratory, Beltsville Human Nutrition Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland
| | - Michelle Stevens
- Food Components and Health Laboratory, Beltsville Human Nutrition Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland
| | - Reed Hoyt
- Biophysics and Biomedical Modeling Division, US Army Research Institute of Environmental Medicine, Natick, Massachusetts
| | - Mark Buller
- Biophysics and Biomedical Modeling Division, US Army Research Institute of Environmental Medicine, Natick, Massachusetts
| | - William Rumpler
- Food Components and Health Laboratory, Beltsville Human Nutrition Research Center, Agricultural Research Service, United States Department of Agriculture, Beltsville, Maryland
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28
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Grant RW, Stephens JM. Fat in flames: influence of cytokines and pattern recognition receptors on adipocyte lipolysis. Am J Physiol Endocrinol Metab 2015; 309:E205-13. [PMID: 26058863 DOI: 10.1152/ajpendo.00053.2015] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Accepted: 06/03/2015] [Indexed: 12/26/2022]
Abstract
Adipose tissue has the largest capacity to store energy in the body and provides energy through the release of free fatty acids during times of energy need. Different types of immune cells are recruited to adipose tissue under various physiological conditions, indicating that these cells contribute to the regulation of adipose tissue. One major pathway influenced by a number of immune cells is the release of free fatty acids through lipolysis during both physiological (e.g., cold stress) and pathophysiological processes (e.g., obesity, type 2 diabetes). Adipose tissue expansion during obesity leads to immune cell infiltration and adipose tissue remodeling, a homeostatic process that promotes inflammation in adipose tissue. The release of proinflammatory cytokines stimulates lipolysis and causes insulin resistance, leading to adipose tissue dysfunction and systemic disruptions of metabolism. This review focuses on the interactions of cytokines and other inflammatory molecules that regulate adipose tissue lipolysis during physiological and pathophysiological states.
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Affiliation(s)
- Ryan W Grant
- Department of Nutrition Science, Purdue University, West Lafayette, Indiana
| | - Jacqueline M Stephens
- Adipocyte Biology Lab, Pennington Biomedical Research Center, Baton Rouge, Louisiana; and Department of Biological Sciences, Louisiana State University, Baton Rouge, Louisiana
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29
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Ha BG, Park JE, Cho HJ, Shon YH. Stimulatory Effects of Balanced Deep Sea Water on Mitochondrial Biogenesis and Function. PLoS One 2015; 10:e0129972. [PMID: 26068191 PMCID: PMC4466323 DOI: 10.1371/journal.pone.0129972] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2014] [Accepted: 05/14/2015] [Indexed: 12/28/2022] Open
Abstract
The worldwide prevalence of metabolic diseases, including obesity and diabetes, is increasing. Mitochondrial dysfunction is recognized as a core feature of these diseases. Emerging evidence also suggests that defects in mitochondrial biogenesis, number, morphology, fusion, and fission, contribute to the development and progression of metabolic diseases. Our previous studies revealed that balanced deep-sea water (BDSW) has potential as a treatment for diabetes and obesity. In this study, we aimed to investigate the mechanism by which BDSW regulates diabetes and obesity by studying its effects on mitochondrial metabolism. To determine whether BDSW regulates mitochondrial biogenesis and function, we investigated its effects on mitochondrial DNA (mtDNA) content, mitochondrial enzyme activity, and the expression of transcription factors and mitochondria specific genes, as well as on the phosphorylation of signaling molecules associated with mitochondria biogenesis and its function in C2C12 myotubes. BDSW increased mitochondrial biogenesis in a time and dose-dependent manner. Quantitative real-time PCR revealed that BDSW enhances gene expression of PGC-1α, NRF1, and TFAM for mitochondrial transcription; MFN1/2 and DRP1 for mitochondrial fusion; OPA1 for mitochondrial fission; TOMM40 and TIMM44 for mitochondrial protein import; CPT-1α and MCAD for fatty acid oxidation; CYTC for oxidative phosphorylation. Upregulation of these genes was validated by increased mitochondria staining, CS activity, CytC oxidase activity, NAD+ to NADH ratio, and the phosphorylation of signaling molecules such as AMPK and SIRT1. Moreover, drinking BDSW remarkably improved mtDNA content in the muscles of HFD-induced obese mice. Taken together, these results suggest that the stimulatory effect of BDSW on mitochondrial biogenesis and function may provide further insights into the regulatory mechanism of BDSW-induced anti-diabetic and anti-obesity action.
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Affiliation(s)
- Byung Geun Ha
- Bio-Medical Research Institute, Kyungpook National University Hospital, Daegu, Korea
| | - Jung-Eun Park
- Bio-Medical Research Institute, Kyungpook National University Hospital, Daegu, Korea
| | - Hyun-Jung Cho
- Bio-Medical Research Institute, Kyungpook National University Hospital, Daegu, Korea
| | - Yun Hee Shon
- Bio-Medical Research Institute, Kyungpook National University Hospital, Daegu, Korea
- * E-mail:
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30
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Muoio DM. Metabolic inflexibility: when mitochondrial indecision leads to metabolic gridlock. Cell 2015; 159:1253-62. [PMID: 25480291 DOI: 10.1016/j.cell.2014.11.034] [Citation(s) in RCA: 266] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Indexed: 12/18/2022]
Abstract
Normal energy metabolism is characterized by periodic shifts in glucose and fat oxidation, as the mitochondrial machinery responsible for carbon combustion switches freely between alternative fuels according to physiological and nutritional circumstances. These transitions in fuel choice are orchestrated by an intricate network of metabolic and cell signaling events that enable exquisite crosstalk and cooperation between competing substrates to maintain energy and glucose homeostasis. By contrast, obesity-related cardiometabolic diseases are increasingly recognized as disorders of metabolic inflexibility, in which nutrient overload and heightened substrate competition result in mitochondrial indecision, impaired fuel switching, and energy dysregulation. This Perspective offers a speculative view on the molecular origins and pathophysiological consequences of metabolic inflexibility.
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Affiliation(s)
- Deborah M Muoio
- Sarah W. Stedman Nutrition and Metabolism Center, Duke Molecular Physiology Institute, Duke University Medical Center, Durham, NC 27710, USA.
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31
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Casanova E, Baselga-Escudero L, Ribas-Latre A, Arola-Arnal A, Bladé C, Arola L, Salvadó MJ. Omega-3 polyunsaturated fatty acids and proanthocyanidins improve postprandial metabolic flexibility in rat. Biofactors 2014; 40:146-56. [PMID: 23983179 DOI: 10.1002/biof.1129] [Citation(s) in RCA: 7] [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: 05/14/2013] [Revised: 07/01/2013] [Accepted: 07/03/2013] [Indexed: 02/06/2023]
Abstract
Postprandial lipemia influences the development of atherosclerosis, which itself constitutes a risk factor for the development of cardiovascular diseases. The introduction of bioactive compounds may prevent these deleterious effects. Proanthocyanidins are potent antioxidants that have hypolipidemic properties, while omega-3 polyunsaturated fatty acids (ω3 PUFAs) stimulate fatty acid oxidation and gene expression programs, controlling mitochondrial functions. In this study, we investigated the effects of acute treatment of ω3 PUFAs and proanthocyanidins on the metabolic flexibility and lipid handling profiles in the skeletal muscle and adipose tissue of rats that were raised on diets, high in saturated fatty acids. For this, oil rich in docosahexaenoic (DHA-OR), grape seed proanthocyanidins extract (GSPE), or both substances (GSPE + DHA-OR) were administered with an overload of lard oil to healthy Wistar rats. Our results indicate that the addition of DHA-OR to lard oil increases insulin sensitivity and redirects fatty acids toward skeletal muscle, thereby activating fatty acid oxidation. We also observed an improvement in adipose mitochondrial functionality and uncoupling. In contrast, GSPE lowers lipidemia, prevents muscle reactive oxygen species (ROS) production and damage, furthermore, activates mitochondrial biogenesis and lipogenesis in adipose tissue. The addition of GSPE+DHA-OR to lard resulted in nearly all the effects of DHA-OR and GSPE administered individually, but the combined administration resulted in a more attenuated profile.
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Affiliation(s)
- Ester Casanova
- Department of Biochemistry and Biotechnology, Nutrigenomics Research Group, Universitat Rovira I Virgili, 43007, Tarragona, Spain
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32
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The PPAR α / γ Agonist, Tesaglitazar, Improves Insulin Mediated Switching of Tissue Glucose and Free Fatty Acid Utilization In Vivo in the Obese Zucker Rat. PPAR Res 2013; 2013:305347. [PMID: 24285952 PMCID: PMC3826326 DOI: 10.1155/2013/305347] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 08/27/2013] [Accepted: 08/27/2013] [Indexed: 12/16/2022] Open
Abstract
Metabolic flexibility was assessed in male Zucker rats: lean controls, obese controls, and obese rats treated with the dual peroxisome proliferator activated receptor (PPAR) α/γ agonist, tesaglitazar, 3 μmol/kg/day for 3 weeks. Whole body glucose disposal rate (Rd) and hepatic glucose output (HGO) were assessed under basal fasting and hyperinsulinemic isoglycemic clamp conditions using [3,3H]glucose. Indices of tissue specific glucose utilization (Rg′) were measured at basal, physiological, and supraphysiological levels of insulinemia using 2-deoxy-D-[2,6-3H]glucose. Finally, whole body and tissue specific FFA and glucose utilization and metabolic fate were evaluated under basal and hyperinsulinemic conditions using a combination of [U-13C]glucose, 2-deoxy-D-[U-14C]glucose, [U-14C]palmitate, and [9,10-3H]-(R)-bromopalmitate. Tesaglitazar improved whole body insulin action by greater suppression of HGO and stimulation of Rd
compared to obese controls. This involved increased insulin stimulation of Rg′
in fat and skeletal muscle as well as increased glycogen synthesis. Tesaglitazar dramatically improved insulin mediated suppression of plasma FFA level, whole body turnover (Rfa), and muscle, liver, and fat utilization. At basal insulin levels, tesaglitazar failed to lower HGO or Rfa
compared to obese controls. In conclusion, the results demonstrate that tesaglitazar has a remarkable ability to improve insulin mediated control of glucose and FFA fluxes in obese Zucker rats.
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Prado CMM, Wells JCK, Smith SR, Stephan BCM, Siervo M. Sarcopenic obesity: A Critical appraisal of the current evidence. Clin Nutr 2012; 31:583-601. [PMID: 22809635 DOI: 10.1016/j.clnu.2012.06.010] [Citation(s) in RCA: 378] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2011] [Revised: 03/25/2012] [Accepted: 06/11/2012] [Indexed: 12/14/2022]
Abstract
Sarcopenic obesity (SO) is assuming a prominent role as a risk factor because of the double metabolic burden derived from low muscle mass (sarcopenia) and excess adiposity (obesity). The increase in obesity prevalence rates in older subjects is of concern given the associated disease risks and more limited therapeutic options available in this age group. This review has two main objectives. The primary objective is to collate results from studies investigating the effects of SO on physical and cardio-metabolic functions. The secondary objective is to evaluate published studies for consistency in methodology, diagnostic criteria, exposure and outcome selection. Large between-study heterogeneity was observed in the application of diagnostic criteria and choice of body composition components for the assessment of SO, which contributes to the inconsistent associations of SO with cardio-metabolic outcomes. We propose a metabolic load:capacity model of SO given by the ratio between fat mass and fat free mass, and discuss how this could be operationalised. The concept of regional fat distribution could be incorporated into the model and tested in future studies to advance our understanding of SO as a predictor of risk for cardio-metabolic diseases and physical disability.
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Affiliation(s)
- C M M Prado
- Department of Nutrition, Food and Exercise Sciences, College of Human Sciences, The Florida State University, 436 Sandels Building, Tallahassee, FL 32306-1493, USA
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Altered mitochondrial function and metabolic inflexibility associated with loss of caveolin-1. Cell Metab 2012; 15:171-85. [PMID: 22326219 PMCID: PMC3278712 DOI: 10.1016/j.cmet.2012.01.004] [Citation(s) in RCA: 132] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Revised: 07/30/2011] [Accepted: 01/06/2012] [Indexed: 11/23/2022]
Abstract
Caveolin-1 is a major structural component of raft structures within the plasma membrane and has been implicated as a regulator of cellular signal transduction with prominent expression in adipocytes. Here, we embarked on a comprehensive characterization of the metabolic pathways dysregulated in caveolin-1 null mice. We found that these mice display decreased circulating levels of total and high molecular weight adiponectin and a reduced ability to change substrate use in response to feeding/fasting conditions. Caveolin-1 null mice are extremely lean but retain muscle mass despite lipodystrophy and massive metabolic dysfunction. Hepatic gluconeogenesis is chronically elevated, while hepatic steatosis is reduced. Our data suggest that the complex phenotype of the caveolin-1 null mouse is caused by altered metabolic and mitochondrial function in adipose tissue with a subsequent compensatory response driven mostly by the liver. This mouse model highlights the central contributions of adipose tissue for system-wide preservation of metabolic flexibility.
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Adamska A, Nikołajuk A, Karczewska-Kupczewska M, Kowalska I, Otziomek E, Górska M, Strączkowski M. Relationships between serum adiponectin and soluble TNF-α receptors and glucose and lipid oxidation in lean and obese subjects. Acta Diabetol 2012; 49:17-24. [PMID: 21234613 PMCID: PMC3266493 DOI: 10.1007/s00592-010-0252-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/01/2010] [Accepted: 12/20/2010] [Indexed: 11/24/2022]
Abstract
Insulin resistance might be associated with an impaired ability of insulin to stimulate glucose oxidation and inhibit lipid oxidation. Insulin action is also inversely associated with TNF-α system and positively related to adiponectin. The aim of the present study was to analyze the associations between serum adiponectin, soluble TNF-α receptors concentrations and the whole-body insulin sensitivity, lipid and glucose oxidation, non-oxidative glucose metabolism (NOGM) and metabolic flexibility in lean and obese subjects. We examined 53 subjects: 25 lean (BMI < 25 kg × m(-2)) and 28 with overweight or obesity (BMI > 25 kg × m(-2)) with normal glucose tolerance. Hyperinsulinemic euglycemic clamp and indirect calorimetry were performed. An increase in respiratory exchange ratio in response to insulin was used as a measure of metabolic flexibility. Obese subjects had lower insulin sensitivity, adiponectin and higher sTNFR1 (all P < 0.001) and sTNFR2 (P = 0.001). Insulin sensitivity was positively related to adiponectin (r = 0.49, P < 0.001) and negatively related to sTNFR1 (r = -0.40, P = 0.004) and sTNFR2 (r = -0.52, P < 0.001). Adiponectin was related to the rate of glucose (r = 0.47, P < 0.001) and lipid (r = -0.40, P = 0.003) oxidation during the clamp, NOGM (r = 0.41, P = 0.002) and metabolic flexibility (r = 0.36, P = 0.007). Serum sTNFR1 and sTNFR2 were associated with the rate of glucose (r = -0.45, P = 0.001; r = -0.51, P < 0.001, respectively) and lipid (r = 0.52, P < 0.001; r = 0.46, P = 0.001, respectively) oxidation during hyperinsulinemia, NOGM (r = -0.31, P = 0.02; r = -0.43, P = 0.002, respectively) and metabolic flexibility (r = -0.47 and r = -0.51, respectively, both P < 0.001) in an opposite manner than adiponectin. Our data suggest that soluble TNF-α receptors and adiponectin have multiple effects on glucose and lipid metabolism in obesity.
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Affiliation(s)
- A Adamska
- Department of Endocrinology, Diabetology and Internal Medicine, Medical University of Białystok, Poland
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Nellemann B, Gormsen LC, Sørensen LP, Christiansen JS, Nielsen S. Impaired insulin-mediated antilipolysis and lactate release in adipose tissue of upper-body obese women. Obesity (Silver Spring) 2012; 20:57-64. [PMID: 21959346 DOI: 10.1038/oby.2011.290] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Upper-body/visceral obesity is associated with abnormalities of free fatty acid (FFA) metabolism and greater risk of developing type 2 diabetes compared with lower-body obesity. In lean subjects lipolysis is readily suppressed by insulin; however, metabolic inflexibility with respect to antilipolysis is a frequent finding in obesity, partly determined by body composition. This study investigates effects of insulin on regional adipose tissue lipolysis and lactate levels in upper-body overweight/obese (UBO), lower-body overweight/obese (LBO), and lean women. The microdialysis technique was used to assess adipose tissue glycerol and lactate concentrations in abdominal and femoral fat during a 5-h basal period and a 2-h hyperinsulinemic euglycemic clamp. The main findings were that the antilipolytic effect of insulin was attenuated in abdominal fat of UBO (glycerol reduction, abd (%): UBO 40.4 (-14 to 66), LBO 46.0 (-8 to 66), lean 66.2 (2-78), ANOVA, P < 0.05), and in femoral fat in both obese groups (glycerol reduction, fem (%): UBO 44.4 (35-67), LBO 44.4 (0-63), lean 65.0 (43-79), ANOVA, P < 0.05). Further, abdominal fat insulin-mediated increase in lactate concentration was greater in lean women compared with UBO women (lactate increase, abd (%): UBO -6.1 (-37.1 to 57.4), LBO 16.5 (-32.2 to 112.5), lean 51.4 (-45.7 to 162.9), P < 0.05), whereas no differences were found between groups in femoral fat (lactate increase, fem (%), UBO -12.9 (-43 to 24), LBO 12.7 (-30.7 to 92), lean 27.6 (-9.5 to 123.8), not significant). Respiratory exchange ratio (RER) increased significantly and similarly in all groups. So, UBO women were metabolically inflexible with respect to insulins antilipolytic and lactate increasing effects in abdominal adipose tissue. These phenomena are probably both consequences of insulin resistance of adipose tissue.
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Affiliation(s)
- Birgitte Nellemann
- Department of Endocrinology and Internal Medicine, Aarhus University Hospital, Aarhus, Denmark
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van Herpen NA, Schrauwen-Hinderling VB, Schaart G, Mensink RP, Schrauwen P. Three weeks on a high-fat diet increases intrahepatic lipid accumulation and decreases metabolic flexibility in healthy overweight men. J Clin Endocrinol Metab 2011; 96:E691-5. [PMID: 21252252 DOI: 10.1210/jc.2010-2243] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
CONTEXT In rodents, high-fat diets increase intrahepatic lipid (IHL), but human studies are scarce. OBJECTIVE Our objective was to examine whether high-fat diets influence IHL, intramyocellular lipids (IMCL), and insulin resistance. DESIGN Twenty overweight men were randomly allocated to low- or high-fat groups (age, 54.0 ± 2.3 and 56.4 ± 2.5 yr; body mass index, 29.3 ± 0.6 and 28.3 ± 0.5 kg/m(2), respectively). Both groups started with a 3-wk low-fat diet [15% energy (En%) as protein, 65 En% as carbohydrates, 20 En% as fat], after which half of the subjects switched to a 3-wk isocaloric high-fat diet (15 En% protein, 30 En% carbohydrates, 55 En% fat). After 3 and 6 wk, IHL and IMCL content were assessed by (1)H magnetic resonance spectroscopy and a muscle biopsy, and insulin sensitivity was studied using a hyperinsulinemic-euglycemic clamp. An additional liver scan was performed after 1 wk in the high-fat group. RESULTS IHL decreased by 13% in the low-fat group and increased by 17% in high-fat group (P = 0.047). IMCL content was unaffected (P = 0.304). Insulin sensitivity was unaffected. At wk 3, IHL correlated negatively with insulin sensitivity (r = -0.584; P = 0.009, all subjects combined). Metabolic flexibility, defined as change in respiratory quotient upon insulin stimulation, was decreased after 3 wk of the high-fat diet (change in respiratory quotient was +0.02 ± 0.02 vs. -0.05 ± 0.1 in low-fat vs. high-fat group, P = 0.009). Basal plasma glucose increased after the high-fat diet (P = 0.038). Plasma parameters insulin, free fatty acids, high-sensitivity C-reactive protein, and liver enzymes and body weight were unaffected by diet. CONCLUSION A 3-wk high-fat diet leads to IHL accumulation and a decreased metabolic flexibility, but insulin sensitivity is unaffected.
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Affiliation(s)
- Noud A van Herpen
- Department of Human Biology, NUTRIM School for Nutrition, Toxicology, and Metabolism, Maastricht University Medical Centre, 6200 MD Maastricht, The Netherlands
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Hoffstedt J, Arner E, Wahrenberg H, Andersson DP, Qvisth V, Löfgren P, Rydén M, Thörne A, Wirén M, Palmér M, Thorell A, Toft E, Arner P. Regional impact of adipose tissue morphology on the metabolic profile in morbid obesity. Diabetologia 2010; 53:2496-503. [PMID: 20830466 DOI: 10.1007/s00125-010-1889-3] [Citation(s) in RCA: 171] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Accepted: 07/15/2010] [Indexed: 12/14/2022]
Abstract
AIMS/HYPOTHESIS The aim of this study was to determine whether the mean size of fat cells in either visceral or subcutaneous adipose tissue has an impact on the metabolic and inflammatory profiles in morbid obesity. METHODS In 80 morbidly obese women, mean visceral (omental) and subcutaneous fat cell sizes were related to in vivo markers of inflammation, glucose metabolism and lipid metabolism. RESULTS Visceral, but not subcutaneous, adipocyte size was significantly associated with plasma apolipoprotein B, total cholesterol, LDL-cholesterol and triacylglycerols (p ranging from 0.002 to 0.015, partial r ranging from 0.3 to 0.4). Subcutaneous, but not visceral, adipocyte size was significantly associated with plasma insulin and glucose, insulin-induced glucose disposal and insulin sensitivity (p ranging from 0.002 to 0.005, partial r ranging from -0.34 to 0.35). The associations were independent of age, BMI, body fat mass or body fat distribution. Adipose tissue hyperplasia (i.e. many small adipocytes) in both regions was significantly associated with better glucose, insulin and lipid profiles compared with adipose hypertrophy (i.e. few large adipocytes) in any or both regions (p ranging from <0.0001 to 0.04). Circulating inflammatory markers were not associated with fat cell size or corresponding gene expression in the fat cell regions examined. CONCLUSIONS/INTERPRETATION In morbidly obese women region-specific variations in mean adipocyte size are associated with metabolic complications but not systemic or adipose inflammation. Large fat cells in the visceral region are linked to dyslipidaemia, whereas large subcutaneous adipocytes are important for glucose and insulin abnormalities. Hyperplasia (many small adipocytes) in both adipose regions may be protective against lipid as well as glucose/insulin abnormalities in obesity.
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Affiliation(s)
- J Hoffstedt
- Department of Medicine, Karolinska Institute at Karolinska Hospital, Huddinge, CME, SE-141 86 Stockholm, Sweden
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