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Kovac L, Goj T, Ouni M, Irmler M, Jähnert M, Beckers J, De Angelis MH, Peter A, Moller A, Birkenfeld AL, Weigert C, Schürmann A. Skeletal Muscle Gene Expression Signatures of Obese High and Low Responders to Endurance Exercise Training. J Clin Endocrinol Metab 2024; 109:1318-1327. [PMID: 37988600 PMCID: PMC11031218 DOI: 10.1210/clinem/dgad677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/15/2023] [Revised: 11/14/2023] [Accepted: 11/20/2023] [Indexed: 11/23/2023]
Abstract
CONTEXT Exercise training is known to improve glucose tolerance and reverse insulin resistance in people with obesity. However, some individuals fail to improve or even decline in their clinical traits following exercise intervention. OBJECTIVE This study focused on gene expression and DNA methylation signatures in skeletal muscle of low (LRE) and high responders (RES) to 8 weeks of supervised endurance training. METHODS We performed skeletal muscle gene expression and DNA methylation analyses in LRE and RES before and after exercise intervention. Additionally, we applied the least absolute shrinkage and selection operator (LASSO) approach to identify predictive marker genes of exercise outcome. RESULTS We show that the two groups differ markedly already before the intervention. RES were characterized by lower expression of genes involved in DNA replication and repair, and higher expression of extracellular matrix (ECM) components. The LASSO approach identified several novel candidates (eg, ZCWPW2, FOXRED1, STK40) that have not been previously described in the context of obesity and exercise response. Following the intervention, LRE reacted with expression changes of genes related to inflammation and apoptosis, RES with genes related to mitochondrial function. LRE exhibited significantly higher expression of ECM components compared to RES, suggesting improper remodeling and potential negative effects on insulin sensitivity. Between 45% and 70% of differences in gene expression could be linked to differences in DNA methylation. CONCLUSION Together, our data offer an insight into molecular mechanisms underlying differences in response to exercise and provide potential novel markers for the success of intervention.
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Affiliation(s)
- Leona Kovac
- Department of Experimental Diabetology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), Nuthetal 14558, Germany
- German Center for Diabetes Research (DZD e.V.), München-Neuherberg 85764, Germany
- Research Group Molecular and Clinical Life Science of Metabolic Diseases, Faculty of Health Sciences Brandenburg, University of Potsdam, Brandenburg 14469, Germany
| | - Thomas Goj
- German Center for Diabetes Research (DZD e.V.), München-Neuherberg 85764, Germany
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tübingen, Tübingen 72076, Germany
| | - Meriem Ouni
- Department of Experimental Diabetology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), Nuthetal 14558, Germany
- German Center for Diabetes Research (DZD e.V.), München-Neuherberg 85764, Germany
| | - Martin Irmler
- Institute of Experimental Genetics, Helmholtz Zentrum München, Neuherberg 85764, Germany
| | - Markus Jähnert
- Department of Experimental Diabetology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), Nuthetal 14558, Germany
- German Center for Diabetes Research (DZD e.V.), München-Neuherberg 85764, Germany
| | - Johannes Beckers
- German Center for Diabetes Research (DZD e.V.), München-Neuherberg 85764, Germany
- Institute of Experimental Genetics, Helmholtz Zentrum München, Neuherberg 85764, Germany
- School of Life Sciences, Chair of Experimental Genetics, Technical University Munich, Freising 85764, Germany
| | - Martin Hrabé De Angelis
- German Center for Diabetes Research (DZD e.V.), München-Neuherberg 85764, Germany
- Institute of Experimental Genetics, Helmholtz Zentrum München, Neuherberg 85764, Germany
- School of Life Sciences, Chair of Experimental Genetics, Technical University Munich, Freising 85764, Germany
| | - Andreas Peter
- German Center for Diabetes Research (DZD e.V.), München-Neuherberg 85764, Germany
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tübingen, Tübingen 72076, Germany
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Zentrum München at the University of Tübingen, Tübingen 72076, Germany
| | - Anja Moller
- German Center for Diabetes Research (DZD e.V.), München-Neuherberg 85764, Germany
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Zentrum München at the University of Tübingen, Tübingen 72076, Germany
- Department of Internal Medicine IV, University Hospital Tübingen, Tübingen 72076, Germany
| | - Andreas L Birkenfeld
- German Center for Diabetes Research (DZD e.V.), München-Neuherberg 85764, Germany
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Zentrum München at the University of Tübingen, Tübingen 72076, Germany
- Department of Internal Medicine IV, University Hospital Tübingen, Tübingen 72076, Germany
| | - Cora Weigert
- German Center for Diabetes Research (DZD e.V.), München-Neuherberg 85764, Germany
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, University Hospital Tübingen, Tübingen 72076, Germany
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Zentrum München at the University of Tübingen, Tübingen 72076, Germany
| | - Annette Schürmann
- Department of Experimental Diabetology, German Institute of Human Nutrition Potsdam-Rehbruecke (DIfE), Nuthetal 14558, Germany
- German Center for Diabetes Research (DZD e.V.), München-Neuherberg 85764, Germany
- Institute of Nutritional Science, University of Potsdam, Nuthetal 14558, Germany
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Dreher SI, Grubba P, von Toerne C, Moruzzi A, Maurer J, Goj T, Birkenfeld AL, Peter A, Loskill P, Hauck SM, Weigert C. IGF1 promotes human myotube differentiation toward a mature metabolic and contractile phenotype. Am J Physiol Cell Physiol 2024; 326:C1462-C1481. [PMID: 38690930 DOI: 10.1152/ajpcell.00654.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2023] [Revised: 02/26/2024] [Accepted: 02/26/2024] [Indexed: 05/03/2024]
Abstract
Skeletal muscle mediates the beneficial effects of exercise, thereby improving insulin sensitivity and reducing the risk for type 2 diabetes. Current human skeletal muscle models in vitro are incapable of fully recapitulating its physiological functions especially muscle contractility. By supplementation of insulin-like growth factor 1 (IGF1), a growth factor secreted by myofibers in vivo, we aimed to overcome these limitations. We monitored the differentiation process starting from primary human CD56-positive myoblasts in the presence/absence of IGF1 in serum-free medium in daily collected samples for 10 days. IGF1-supported differentiation formed thicker multinucleated myotubes showing physiological contraction upon electrical pulse stimulation following day 6. Myotubes without IGF1 were almost incapable of contraction. IGF1-treatment shifted the proteome toward skeletal muscle-specific proteins that contribute to myofibril and sarcomere assembly, striated muscle contraction, and ATP production. Elevated PPARGC1A, MYH7 and reduced MYH1/2 suggest a more oxidative phenotype further demonstrated by higher abundance of proteins of the respiratory chain and elevated mitochondrial respiration. IGF1-treatment also upregulated GLUT4 and increased insulin-dependent glucose uptake compared to myotubes differentiated without IGF1. To conclude, addition of IGF1 to serum-free medium significantly improves the differentiation of human myotubes that showed enhanced myofibril formation, response to electrical pulse stimulation, oxidative respiratory capacity and glucose metabolism overcoming limitations of previous standards. This novel protocol enables investigation of muscular exercise on a molecular level.
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Affiliation(s)
- Simon I Dreher
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, Universitätsklinikum Tübingen, Tuebingen, Baden-Württemberg, Germany
| | - Paul Grubba
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, Universitätsklinikum Tübingen, Germany
| | - Christine von Toerne
- Research Unit Protein Science and Core Facility Proteomics, Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Helmholtz Zentrum München, Germany
| | - Alessia Moruzzi
- NMI Natural and Medical Sciences Institute, University of Tübingen, Germany
| | - Jennifer Maurer
- Institue for Clinical Chemistry and Pathobiochemistry, Universitätsklinikum Tübingen, Tübingen, Germany
| | - Thomas Goj
- Institute for Clinical Chemistry and Pathobiochemistry, Universitätsklinikum Tübingen, Germany
| | - Andreas L Birkenfeld
- German Center for Diabetes Research (DZD e.V.); Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the Eberhard-KarlsUniversity of Tübingen, Neuherberg;, Tuebingen, Germany
| | - Andreas Peter
- Institute for Clinical Chemistry and Pathobiochemistry, Department for Diagnostic Laboratory Medicine, Universitätsklinikum Tübingen, Tuebingen, Germany
| | - Peter Loskill
- Department for Microphysiological Systems, Institute of Biomedical Engineering, Faculty of Medicine, University of Tübingen, Germany
| | - Stefanie M Hauck
- Metabolomics and Proteomics Core, Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany, Neuherberg, Germany
| | - Cora Weigert
- Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tuebingen, Hoppe Seyler-Strasse 3, 72076 Tuebingen, Germany; Institute for Diabetes Research and Metabolic Diseases of th, Tuebingen, Germany
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Maurer J, Zhao X, Irmler M, Gudiksen A, Pilmark NS, Li Q, Goj T, Beckers J, Hrabě de Angelis M, Birkenfeld AL, Peter A, Lehmann R, Pilegaard H, Karstoft K, Xu G, Weigert C. Redox state and altered pyruvate metabolism contribute to a dose-dependent metformin-induced lactate production of human myotubes. Am J Physiol Cell Physiol 2023; 325:C1131-C1143. [PMID: 37694284 PMCID: PMC10635655 DOI: 10.1152/ajpcell.00186.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 09/01/2023] [Accepted: 09/01/2023] [Indexed: 09/12/2023]
Abstract
Metformin-induced glycolysis and lactate production can lead to acidosis as a life-threatening side effect, but slight increases in blood lactate levels in a physiological range were also reported in metformin-treated patients. However, how metformin increases systemic lactate concentrations is only partly understood. Because human skeletal muscle has a high capacity to produce lactate, the aim was to elucidate the dose-dependent regulation of metformin-induced lactate production and the potential contribution of skeletal muscle to blood lactate levels under metformin treatment. This was examined by using metformin treatment (16-776 μM) of primary human myotubes and by 17 days of metformin treatment in humans. As from 78 µM, metformin induced lactate production and secretion and glucose consumption. Investigating the cellular redox state by mitochondrial respirometry, we found metformin to inhibit the respiratory chain complex I (776 µM, P < 0.01) along with decreasing the [NAD+]:[NADH] ratio (776 µM, P < 0.001). RNA sequencing and phospho-immunoblot data indicate inhibition of pyruvate oxidation mediated through phosphorylation of the pyruvate dehydrogenase (PDH) complex (39 µM, P < 0.01). On the other hand, in human skeletal muscle, phosphorylation of PDH was not altered by metformin. Nonetheless, blood lactate levels were increased under metformin treatment (P < 0.05). In conclusion, the findings suggest that metformin-induced inhibition of pyruvate oxidation combined with altered cellular redox state shifts the equilibrium of the lactate dehydrogenase (LDH) reaction leading to a dose-dependent lactate production in primary human myotubes.NEW & NOTEWORTHY Metformin shifts the equilibrium of lactate dehydrogenase (LDH) reaction by low dose-induced phosphorylation of pyruvate dehydrogenase (PDH) resulting in inhibition of pyruvate oxidation and high dose-induced increase in NADH, which explains the dose-dependent lactate production of differentiated human skeletal muscle cells.
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Affiliation(s)
- Jennifer Maurer
- Department for Diagnostic Laboratory Medicine, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, Tübingen, Germany
| | - Xinjie Zhao
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China
| | - Martin Irmler
- Institute of Experimental Genetics, Helmholtz Munich, Neuherberg, Germany
| | - Anders Gudiksen
- Section for Cell Biology and Physiology, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Nanna S Pilmark
- Centre for Physical Activity Research (CFAS), Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Qi Li
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China
| | - Thomas Goj
- Department for Diagnostic Laboratory Medicine, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, Tübingen, Germany
| | - Johannes Beckers
- Institute of Experimental Genetics, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Chair of Experimental Genetics, Technical University of Munich, Freising, Germany
| | - Martin Hrabě de Angelis
- Institute of Experimental Genetics, Helmholtz Munich, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Chair of Experimental Genetics, Technical University of Munich, Freising, Germany
| | - Andreas L Birkenfeld
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Institute for Diabetes Research and Metabolic Diseases, Helmholtz Munich, University of Tübingen, Tübingen, Germany
- Department of Internal Medicine IV, University Hospital Tübingen, Tübingen, Germany
| | - Andreas Peter
- Department for Diagnostic Laboratory Medicine, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, Tübingen, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Institute for Diabetes Research and Metabolic Diseases, Helmholtz Munich, University of Tübingen, Tübingen, Germany
| | - Rainer Lehmann
- Department for Diagnostic Laboratory Medicine, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, Tübingen, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Institute for Diabetes Research and Metabolic Diseases, Helmholtz Munich, University of Tübingen, Tübingen, Germany
| | - Henriette Pilegaard
- Section for Cell Biology and Physiology, Department of Biology, University of Copenhagen, Copenhagen, Denmark
| | - Kristian Karstoft
- Centre for Physical Activity Research (CFAS), Rigshospitalet, University Hospital of Copenhagen, Copenhagen, Denmark
- Department of Clinical Pharmacology, Bispebjerg and Fredriksberg Hospital, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Guowang Xu
- Key Laboratory of Separation Science for Analytical Chemistry, Dalian Institute of Chemical Physics, The Chinese Academy of Sciences, Dalian, China
| | - Cora Weigert
- Department for Diagnostic Laboratory Medicine, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, Tübingen, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Institute for Diabetes Research and Metabolic Diseases, Helmholtz Munich, University of Tübingen, Tübingen, Germany
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Goj T, Hoene M, Fritsche L, Schneeweiss P, Machann J, Petrera A, Hauck SM, Fritsche A, Birkenfeld AL, Peter A, Heni M, Niess AM, Moller A, Weigert C. The Acute Cytokine Response to 30-Minute Exercise Bouts Before and After 8-Week Endurance Training in Individuals With Obesity. J Clin Endocrinol Metab 2023; 108:865-875. [PMID: 36285617 PMCID: PMC9999360 DOI: 10.1210/clinem/dgac623] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Revised: 09/30/2022] [Indexed: 02/13/2023]
Abstract
CONTEXT One acute bout of exercise leads to a rapid increase in the systemic cytokine concentration. Regular exercise might alter the cytokine response, in particular in beforehand untrained and obese individuals. OBJECTIVE Using a proximity extension assay, we studied the effects of acute exercise as well as endurance training on a panel of 92 cytokines related to inflammation. METHODS A total of 22 individuals (30 ± 9 years; peak oxygen uptake [VO2peak] 25.2 ± 4.2 mL/[kg × min]; body mass index [BMI] 31.7 ± 4.4) participated in an 8-week endurance exercise intervention. Blood samples were collected before and immediately after 30 minutes' ergometer exercise at 80% VO2peak. RESULTS Before and after the training intervention, 40 and 37 cytokines, respectively, were acutely increased more than 1.2-fold (Benjamini-Hochberg [BH]-adjusted P < .05). The exercise intervention did not change the acute increase in cytokines nor the resting cytokine levels, whereas fitness was improved and adiposity reduced. The increase in fitness led to a slight increase in power output when exercising at the same heart rate, which might explain the comparable increase in cytokines before and after the intervention. The largest acute increase was found for OSM, TGFA, CXCL1 and 5, and TNFSF14 (≥ 1.9-fold, BH-adjusted P < .001). The transcript levels of these proteins in whole blood were also elevated, particularly in the trained state. Only the acute increase in IL6 (1.3-fold) was related to the increase in lactate, confirming the lactate-driven secretion of IL6. CONCLUSION Our comprehensive proteomics approach detected several underexplored serum exerkines with up to now less understood function in the adaptation to exercise.
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Affiliation(s)
- Thomas Goj
- Department for Diagnostic Laboratory Medicine, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, 72076 Tübingen, Germany
- Institute for Diabetes Research and Metabolic Diseases of Helmholtz Zentrum München at the University of Tübingen, 72076 Tübingen, Germany
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
| | - Miriam Hoene
- Department for Diagnostic Laboratory Medicine, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, 72076 Tübingen, Germany
| | - Louise Fritsche
- Institute for Diabetes Research and Metabolic Diseases of Helmholtz Zentrum München at the University of Tübingen, 72076 Tübingen, Germany
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
| | - Patrick Schneeweiss
- Department of Sports Medicine, University Hospital Tübingen, 72076 Tübingen, Germany
- Interfaculty Research Institute for Sports and Physical Activity, University of Tübingen, 72076 Tübingen, Germany
| | - Jürgen Machann
- Institute for Diabetes Research and Metabolic Diseases of Helmholtz Zentrum München at the University of Tübingen, 72076 Tübingen, Germany
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
- Section on Experimental Radiology, Department of Diagnostic and Interventional Radiology, University Hospital Tübingen, 72076 Tübingen, Germany
| | - Agnese Petrera
- Metabolomics and Proteomics Core, Helmholtz Zentrum München, 80939 Munich, Germany
| | - Stefanie M Hauck
- Metabolomics and Proteomics Core, Helmholtz Zentrum München, 80939 Munich, Germany
| | - Andreas Fritsche
- Institute for Diabetes Research and Metabolic Diseases of Helmholtz Zentrum München at the University of Tübingen, 72076 Tübingen, Germany
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
- Department of Internal Medicine IV, University Hospital Tübingen, 72076 Tübingen, Germany
| | - Andreas L Birkenfeld
- Institute for Diabetes Research and Metabolic Diseases of Helmholtz Zentrum München at the University of Tübingen, 72076 Tübingen, Germany
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
- Department of Internal Medicine IV, University Hospital Tübingen, 72076 Tübingen, Germany
| | - Andreas Peter
- Department for Diagnostic Laboratory Medicine, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, 72076 Tübingen, Germany
- Institute for Diabetes Research and Metabolic Diseases of Helmholtz Zentrum München at the University of Tübingen, 72076 Tübingen, Germany
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
| | - Martin Heni
- Department for Diagnostic Laboratory Medicine, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, 72076 Tübingen, Germany
- Institute for Diabetes Research and Metabolic Diseases of Helmholtz Zentrum München at the University of Tübingen, 72076 Tübingen, Germany
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
- Department of Sports Medicine, University Hospital Tübingen, 72076 Tübingen, Germany
- Division of Endocrinology and Diabetology, Department of Internal Medicine 1, University Hospital Ulm, Ulm, Germany
| | - Andreas M Niess
- Department of Sports Medicine, University Hospital Tübingen, 72076 Tübingen, Germany
- Interfaculty Research Institute for Sports and Physical Activity, University of Tübingen, 72076 Tübingen, Germany
| | - Anja Moller
- Institute for Diabetes Research and Metabolic Diseases of Helmholtz Zentrum München at the University of Tübingen, 72076 Tübingen, Germany
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
- Department of Internal Medicine IV, University Hospital Tübingen, 72076 Tübingen, Germany
| | - Cora Weigert
- Correspondence: Cora Weigert, PhD, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, Hoppe-Seyler-Str 3, 72076 Tübingen, Germany.
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Kullmann S, Goj T, Veit R, Fritsche L, Wagner L, Schneeweiss P, Hoene M, Hoffmann C, Machann J, Niess A, Preissl H, Birkenfeld AL, Peter A, Häring HU, Fritsche A, Moller A, Weigert C, Heni M. Exercise restores brain insulin sensitivity in sedentary adults who are overweight and obese. JCI Insight 2022; 7:161498. [PMID: 36134657 DOI: 10.1172/jci.insight.161498] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Accepted: 08/04/2022] [Indexed: 11/17/2022] Open
Abstract
BACKGROUNDInsulin resistance of the brain can unfavorably affect long-term weight maintenance and body fat distribution. Little is known if and how brain insulin sensitivity can be restored in humans. We aimed to evaluate the effects of an exercise intervention on insulin sensitivity of the brain and how this relates to exercise-induced changes in whole-body metabolism and behavior.METHODSIn this clinical trial, sedentary participants who were overweight and obese underwent an 8-week supervised aerobic training intervention. Brain insulin sensitivity was assessed in 21 participants (14 women, 7 men; age range 21-59 years; BMI range 27.5-45.5 kg/m2) using functional MRI, combined with intranasal administration of insulin, before and after the intervention.RESULTSThe exercise program resulted in enhanced brain insulin action to the level of a person of healthy weight, demonstrated by increased insulin-induced striatal activity and strengthened hippocampal functional connectivity. Improved brain insulin action correlated with increased mitochondrial respiration in skeletal muscle, reductions in visceral fat and hunger, as well as improved cognition. Mediation analyses suggest that improved brain insulin responsiveness helps mediate the peripheral exercise effects leading to healthier body fat distribution and reduced perception of hunger.CONCLUSIONOur study demonstrates that an 8-week exercise intervention in sedentary individuals can restore insulin action in the brain. Hence, the ameliorating benefits of exercise toward brain insulin resistance may provide an objective therapeutic target in humans in the challenge to reduce diabetes risk factors.TRIAL REGISTRATIONClinicalTrials.gov (NCT03151590).FUNDINGBMBF/DZD 01GI0925.
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Affiliation(s)
- Stephanie Kullmann
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen, Tübingen, Germany.,German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany.,Department of Internal Medicine, Division of Endocrinology, Diabetology and Nephrology, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Thomas Goj
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen, Tübingen, Germany.,German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany.,Institute for Clinical Chemistry and Pathobiochemistry and
| | - Ralf Veit
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen, Tübingen, Germany.,German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany
| | - Louise Fritsche
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen, Tübingen, Germany.,German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany
| | - Lore Wagner
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen, Tübingen, Germany.,German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany
| | - Patrick Schneeweiss
- Department of Sports Medicine, University Hospital Tübingen, Germany.,Interfaculty Research Institute for Sport and Physical Activity, University of Tübingen, Tübingen, Germany
| | - Miriam Hoene
- Institute for Clinical Chemistry and Pathobiochemistry and
| | | | - Jürgen Machann
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen, Tübingen, Germany.,German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany.,Department of Radiology, Section on Experimental Radiology, University Hospital Tübingen, Germany
| | - Andreas Niess
- Department of Sports Medicine, University Hospital Tübingen, Germany.,Interfaculty Research Institute for Sport and Physical Activity, University of Tübingen, Tübingen, Germany
| | - Hubert Preissl
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen, Tübingen, Germany.,German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany.,Department of Internal Medicine, Division of Endocrinology, Diabetology and Nephrology, Eberhard Karls University Tübingen, Tübingen, Germany.,Institute for Diabetes and Obesity, Helmholtz Diabetes Center, Helmholtz Zentrum München, German Research Center for Environmental Health (GmbH), Neuherberg, Germany
| | - Andreas L Birkenfeld
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen, Tübingen, Germany.,German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany.,Department of Internal Medicine, Division of Endocrinology, Diabetology and Nephrology, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Andreas Peter
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen, Tübingen, Germany.,German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany.,Institute for Clinical Chemistry and Pathobiochemistry and
| | - Hans-Ulrich Häring
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen, Tübingen, Germany.,German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany.,Department of Internal Medicine, Division of Endocrinology, Diabetology and Nephrology, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Andreas Fritsche
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen, Tübingen, Germany.,German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany.,Department of Internal Medicine, Division of Endocrinology, Diabetology and Nephrology, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Anja Moller
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen, Tübingen, Germany.,German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany.,Department of Internal Medicine, Division of Endocrinology, Diabetology and Nephrology, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Cora Weigert
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen, Tübingen, Germany.,German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany.,Institute for Clinical Chemistry and Pathobiochemistry and
| | - Martin Heni
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Center Munich at the University of Tübingen, Tübingen, Germany.,German Center for Diabetes Research (DZD e.V.), Neuherberg, Germany.,Department of Internal Medicine, Division of Endocrinology, Diabetology and Nephrology, Eberhard Karls University Tübingen, Tübingen, Germany.,Institute for Clinical Chemistry and Pathobiochemistry and.,Division of Endocrinology and Diabetology, Department of Internal Medicine I, Ulm University Hospital, Ulm, Germany
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Michalek S, Goj T, Plazzo AP, Marovca B, Bornhauser B, Brunner T. LRH
‐1/
NR5A2
interacts with the glucocorticoid receptor to regulate glucocorticoid resistance. EMBO Rep 2022; 23:e54195. [PMID: 35801407 PMCID: PMC9442305 DOI: 10.15252/embr.202154195] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 06/09/2022] [Accepted: 06/14/2022] [Indexed: 11/09/2022] Open
Affiliation(s)
- Svenja Michalek
- Department of Biology, Biochemical Pharmacology University of Konstanz Konstanz Germany
- Konstanz Research School Chemical Biology KORS‐CB University of Konstanz Konstanz Germany
| | - Thomas Goj
- Department of Biology, Biochemical Pharmacology University of Konstanz Konstanz Germany
| | - Anna Pia Plazzo
- Department of Biology, Biochemical Pharmacology University of Konstanz Konstanz Germany
| | - Blerim Marovca
- Division of Oncology and Children's Research Centre University Children's Hospital Zurich Zurich Switzerland
| | - Beat Bornhauser
- Division of Oncology and Children's Research Centre University Children's Hospital Zurich Zurich Switzerland
| | - Thomas Brunner
- Department of Biology, Biochemical Pharmacology University of Konstanz Konstanz Germany
- Konstanz Research School Chemical Biology KORS‐CB University of Konstanz Konstanz Germany
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Holzer AK, Suciu I, Karreman C, Goj T, Leist M. Specific Attenuation of Purinergic Signaling during Bortezomib-Induced Peripheral Neuropathy In Vitro. Int J Mol Sci 2022; 23:ijms23073734. [PMID: 35409095 PMCID: PMC8998302 DOI: 10.3390/ijms23073734] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2022] [Revised: 03/22/2022] [Accepted: 03/24/2022] [Indexed: 12/18/2022] Open
Abstract
Human peripheral neuropathies are poorly understood, and the availability of experimental models limits further research. The PeriTox test uses immature dorsal root ganglia (DRG)-like neurons, derived from induced pluripotent stem cells (iPSC), to assess cell death and neurite damage. Here, we explored the suitability of matured peripheral neuron cultures for the detection of sub-cytotoxic endpoints, such as altered responses of pain-related P2X receptors. A two-step differentiation protocol, involving the transient expression of ectopic neurogenin-1 (NGN1) allowed for the generation of homogeneous cultures of sensory neurons. After >38 days of differentiation, they showed a robust response (Ca2+-signaling) to the P2X3 ligand α,β-methylene ATP. The clinical proteasome inhibitor bortezomib abolished the P2X3 signal at ≥5 nM, while 50−200 nM was required in the PeriTox test to identify neurite damage and cell death. A 24 h treatment with low nM concentrations of bortezomib led to moderate increases in resting cell intracellular Ca2+ concentration but signaling through transient receptor potential V1 (TRPV1) receptors or depolarization-triggered Ca2+ influx remained unaffected. We interpreted the specific attenuation of purinergic signaling as a functional cell stress response. A reorganization of tubulin to form dense structures around the cell somata confirmed a mild, non-cytotoxic stress triggered by low concentrations of bortezomib. The proteasome inhibitors carfilzomib, delanzomib, epoxomicin, and MG-132 showed similar stress responses. Thus, the model presented here may be used for the profiling of new proteasome inhibitors in regard to their side effect (neuropathy) potential, or for pharmacological studies on the attenuation of their neurotoxicity. P2X3 signaling proved useful as endpoint to assess potential neurotoxicants in peripheral neurons.
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Affiliation(s)
- Anna-Katharina Holzer
- In Vitro Toxicology and Biomedicine, Dept Inaugurated by the Doerenkamp-Zbinden Foundation, University of Konstanz, 78457 Konstanz, Germany; (A.-K.H.); (I.S.); (C.K.); (T.G.)
| | - Ilinca Suciu
- In Vitro Toxicology and Biomedicine, Dept Inaugurated by the Doerenkamp-Zbinden Foundation, University of Konstanz, 78457 Konstanz, Germany; (A.-K.H.); (I.S.); (C.K.); (T.G.)
- Konstanz Research School Chemical Biology (KoRS-CB), University of Konstanz, 78457 Konstanz, Germany
| | - Christiaan Karreman
- In Vitro Toxicology and Biomedicine, Dept Inaugurated by the Doerenkamp-Zbinden Foundation, University of Konstanz, 78457 Konstanz, Germany; (A.-K.H.); (I.S.); (C.K.); (T.G.)
| | - Thomas Goj
- In Vitro Toxicology and Biomedicine, Dept Inaugurated by the Doerenkamp-Zbinden Foundation, University of Konstanz, 78457 Konstanz, Germany; (A.-K.H.); (I.S.); (C.K.); (T.G.)
| | - Marcel Leist
- In Vitro Toxicology and Biomedicine, Dept Inaugurated by the Doerenkamp-Zbinden Foundation, University of Konstanz, 78457 Konstanz, Germany; (A.-K.H.); (I.S.); (C.K.); (T.G.)
- CAAT-Europe, University of Konstanz, 78457 Konstanz, Germany
- Correspondence: ; Tel.: +49-(0)-7531-88-5037
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