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Bagri KM, de Andrade Abraham C, Santos AT, da Silva WS, Costa ML, Mermelstein C. Rotenone inhibits embryonic chick myogenesis in a ROS-dependent mechanism. Tissue Cell 2024; 89:102423. [PMID: 38875923 DOI: 10.1016/j.tice.2024.102423] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2024] [Revised: 05/20/2024] [Accepted: 05/23/2024] [Indexed: 06/16/2024]
Abstract
Skeletal muscle function is highly dependent on the energy supply provided by mitochondria. Besides ATP production, mitochondria have several other roles, such as calcium storage, heat production, cell death signaling, autophagy regulation and redox state modulation. Mitochondrial function is crucial for skeletal muscle fiber formation. Disorders that affect mitochondria have a major impact in muscle development and function. Here we studied the role of mitochondria during chick skeletal myogenesis. We analyzed the intracellular distribution of mitochondria in myoblasts, fibroblasts and myotubes using Mitotracker labeling. Mitochondrial respiration was investigated in chick muscle cells. Our results show that (i) myoblasts and myotubes have more mitochondria than muscle fibroblasts; (ii) mitochondria are organized in long lines within the whole cytoplasm and around the nuclei of myotubes, while in myoblasts they are dispersed in the cytoplasm; (iii) the area of mitochondria in myotubes increases during myogenesis, while in myoblasts and fibroblasts there is a slight decrease; (iv) mitochondrial length increases in the three cell types (myoblasts, fibroblasts and myotubes) during myogenesis; (v) the distance of mitochondria to the nucleus increases in myoblasts and myotubes during myogenesis; (vi) Rotenone inhibits muscle fiber formation, while FCCP increases the size of myotubes; (vii) N-acetyl cysteine (NAC), an inhibitor of ROS formation, rescues the effects of Rotenone on muscle fiber size; and (viii) Rotenone induces the production of ROS in chick myogenic cells. The collection of our results suggests a role of ROS signaling in mitochondrial function during chick myogenesis.
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Affiliation(s)
- Kayo Moreira Bagri
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | | | - Anderson Teixeira Santos
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Wagner Seixas da Silva
- Instituto de Bioquímica Médica Leopoldo de Meis, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Manoel Luis Costa
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil
| | - Claudia Mermelstein
- Instituto de Ciências Biomédicas, Universidade Federal do Rio de Janeiro, Rio de Janeiro, RJ, Brazil.
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2
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Joyce CM, Gordon EB, McGivney A, Li X, Lim T, Cohen MA, Kaplan DL. Methods to Screen the Adhesion of Fish Cells on Plant-, Algal- and Fungal-Derived Biomaterials. ACS APPLIED MATERIALS & INTERFACES 2024; 16:39969-39980. [PMID: 39024341 DOI: 10.1021/acsami.4c06543] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/20/2024]
Abstract
Cellular agriculture, an alternative and innovative approach to sustainable food production, has gained momentum in recent years. However, there is limited research into the production of cultivated seafood. Here, we investigated the ability of fish mackerel cells (Scomber scombrus) to adhere to plant, algal and fungal-based biomaterial scaffolds, aiming to optimize the cultivation of fish cells for use in cellular agriculture. A mackerel cell line was utilized, and metabolic assays and confocal imaging were utilized to track cell adhesion, growth, and differentiation on the different biomaterials. The mackerel cells adhered and grew on gelatin (positive control), zein, and soy proteins, as well as on alginate, chitosan, and cellulose polysaccharides. The highest adhesion and growth were on the zein and chitosan substrates, apart from the gelatin control. These findings provide a blueprint to enhance scaffold selection and design, contributing to the broader field of cellular agriculture through the development of scalable and eco-conscious solutions for meeting the growing global demand for seafood.
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Affiliation(s)
- Connor M Joyce
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
| | - Edward B Gordon
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
| | - Aelish McGivney
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
| | - Xinxin Li
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
| | - Taehwan Lim
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
| | - Malkiel A Cohen
- Wanda Fish Technologies LTD, 7 Pinhas Sapir St., Ness Ziona 7403630, Israel
| | - David L Kaplan
- Biomedical Engineering Department, Tissue Engineering Resource Center, Tufts University, 4 Colby Street, Medford, Massachusetts 02155, United States
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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 PMCID: PMC11371365 DOI: 10.1152/ajpcell.00654.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [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 (EPS) 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 glucose transporter (GLUT)4 and increased insulin-dependent glucose uptake compared with 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.NEW & NOTEWORTHY Human skeletal muscle models are highly valuable to study how exercise prevents type 2 diabetes without invasive biopsies. Current models did not fully recapitulate the function of skeletal muscle especially during exercise. By supplementing insulin-like growth factor 1 (IGF1), the authors developed a functional human skeletal muscle model characterized by inducible contractility and increased oxidative and insulin-sensitive metabolism. The novel protocol overcomes the limitations of previous standards and enables investigation of exercise on a molecular level.
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Affiliation(s)
- Simon I Dreher
- Department for Diagnostic Laboratory Medicine, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, Tübingen, Germany
| | - Paul Grubba
- Department for Diagnostic Laboratory Medicine, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, Tübingen, Germany
| | - Christine von Toerne
- Metabolomics and Proteomics Core Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
| | - Alessia Moruzzi
- NMI Natural and Medical Sciences Institute at the University of Tübingen, Reutlingen, Germany
- Department for Microphysiological Systems, Institute of Biomedical Engineering, Faculty of Medicine, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Jennifer Maurer
- Department for Diagnostic Laboratory Medicine, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, Tübingen, Germany
| | - Thomas Goj
- Department for Diagnostic Laboratory Medicine, Institute for Clinical Chemistry and Pathobiochemistry, University Hospital Tübingen, Tübingen, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - Andreas L Birkenfeld
- German Center for Diabetes Research (DZD), Neuherberg, Germany
- Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Zentrum München, 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 of the Helmholtz Zentrum München, University of Tübingen, Tübingen, Germany
| | - Peter Loskill
- NMI Natural and Medical Sciences Institute at the University of Tübingen, Reutlingen, Germany
- Department for Microphysiological Systems, Institute of Biomedical Engineering, Faculty of Medicine, Eberhard Karls University Tübingen, Tübingen, Germany
| | - Stefanie M Hauck
- Metabolomics and Proteomics Core Helmholtz Center Munich, German Research Center for Environmental Health, Neuherberg, Germany
- German Center for Diabetes Research (DZD), Neuherberg, Germany
| | - 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 of the Helmholtz Zentrum München, University of Tübingen, Tübingen, Germany
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4
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Zhu P, Peek CB. Circadian timing of satellite cell function and muscle regeneration. Curr Top Dev Biol 2024; 158:307-339. [PMID: 38670711 DOI: 10.1016/bs.ctdb.2024.01.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2024]
Abstract
Recent research has highlighted an important role for the molecular circadian machinery in the regulation of tissue-specific function and stress responses. Indeed, disruption of circadian function, which is pervasive in modern society, is linked to accelerated aging, obesity, and type 2 diabetes. Furthermore, evidence supporting the importance of the circadian clock within both the mature muscle tissue and satellite cells to regulate the maintenance of muscle mass and repair capacity in response injury has recently emerged. Here, we review the discovery of circadian clocks within the satellite cell (a.k.a. adult muscle stem cell) and how they act to regulate metabolism, epigenetics, and myogenesis during both healthy and diseased states.
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Affiliation(s)
- Pei Zhu
- Department of Biochemistry and Molecular Genetics, Northwestern University Feinberg School of Medicine, Chicago, IL, United States; Department of Medicine-Endocrinology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States.
| | - Clara B Peek
- Department of Biochemistry and Molecular Genetics, Northwestern University Feinberg School of Medicine, Chicago, IL, United States; Department of Medicine-Endocrinology, Northwestern University Feinberg School of Medicine, Chicago, IL, United States.
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5
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Triolo M, Baker N, Agarwal S, Larionov N, Podinić T, Khacho M. Optic atrophy 1 mediates muscle differentiation by promoting a metabolic switch via the supercomplex assembly factor SCAF1. iScience 2024; 27:109164. [PMID: 38414856 PMCID: PMC10897915 DOI: 10.1016/j.isci.2024.109164] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 12/08/2023] [Accepted: 02/05/2024] [Indexed: 02/29/2024] Open
Abstract
Myogenic differentiation is integral for the regeneration of skeletal muscle following tissue damage. Though high-energy post-mitotic muscle relies predominantly on mitochondrial respiration, the importance of mitochondrial remodeling in enabling muscle differentiation and the players involved are not fully known. Here we show that the mitochondrial fusion protein OPA1 is essential for muscle differentiation. Our study demonstrates that OPA1 loss or inhibition, through genetic and pharmacological means, abolishes in vivo muscle regeneration and in vitro myotube formation. We show that both the inhibition and genetic deletion of OPA1 prevent the early onset metabolic switch required to drive myoblast differentiation. In addition, we observe an OPA1-dependent upregulation of the supercomplex assembly factor, SCAF1, at the onset of differentiation. Importantly, preventing the upregulation of SCAF1, through OPA1 loss or siRNA-mediated SCAF1 knockdown, impairs metabolic reprogramming and muscle differentiation. These findings reveal the integral role of OPA1 and mitochondrial reprogramming at the onset of myogenic differentiation.
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Affiliation(s)
- Matthew Triolo
- Department of Biochemistry, Microbiology and Immunology, Center for Neuromuscular Disease (CNMD), Ottawa Institute of Systems Biology (OISB), Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Nicole Baker
- Department of Biochemistry, Microbiology and Immunology, Center for Neuromuscular Disease (CNMD), Ottawa Institute of Systems Biology (OISB), Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Soniya Agarwal
- Department of Biochemistry, Microbiology and Immunology, Center for Neuromuscular Disease (CNMD), Ottawa Institute of Systems Biology (OISB), Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Nikita Larionov
- Department of Biochemistry, Microbiology and Immunology, Center for Neuromuscular Disease (CNMD), Ottawa Institute of Systems Biology (OISB), Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Tina Podinić
- Department of Biochemistry, Microbiology and Immunology, Center for Neuromuscular Disease (CNMD), Ottawa Institute of Systems Biology (OISB), Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
| | - Mireille Khacho
- Department of Biochemistry, Microbiology and Immunology, Center for Neuromuscular Disease (CNMD), Ottawa Institute of Systems Biology (OISB), Faculty of Medicine, University of Ottawa, Ottawa, ON K1H 8M5, Canada
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6
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Gupta P, Kaur N, Kumar V, Gupta A, Gupta S, Dua A, Injeti E, Mittal A. Evaluation of cinnamaldehyde derivatives as potential protective agents against oxidative-stress induced myotube atrophy using chemical, biological and computational analysis. Bioorg Chem 2023; 139:106661. [PMID: 37354662 DOI: 10.1016/j.bioorg.2023.106661] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2023] [Revised: 05/14/2023] [Accepted: 06/06/2023] [Indexed: 06/26/2023]
Abstract
Skeletal muscle atrophy, associated with increased morbidity, mortality and poor quality of life, is a metabolic disorder with no FDA approved drug. Oxidative stress is one of the key mediators of atrophy that influences various cell signaling molecules. The goal of this study is to identify potential antioxidant agents that could be used to treat atrophy. In this study in vitro and in situ screening of different cinnamaldehyde (CNA) derivatives for their antioxidant effects was done along with computational analysis to understand the relationship between their chemical structure and biological activity. Data show that 2-hydroxycinnamaldehyde (2HCNA) worked better than other CNA analogues at physiological pH, while 4-Fluoro-2-methoxycinnamaldehyde (4FoCNA) showed the maximum antioxidant activity under acidic conditions. However, these derivatives (2HCNA and 4FoCNA) were found to be toxic to the cultured myotubes (mature myofiber) under both physiological and pathophysiological conditions. Immunofluorescence, bright-field microscopic and biochemical studies conducted using live C2C12 cells showed that pre-incubation with other CNA analogues i.e. 2-methoxycinnamaldehyde (2MeCNA) and 2-benzyloxycinnamaldehyde (2BzCNA) not only maintained the normal morphology of myotubes but also protected them from H2O2-induced atrophy. These compounds (2MeCNA and 2BzCNA) showed higher stability and antioxidant potential, as indicated by computer simulation data analyzed by Density Functional Theory (DFT) based molecular modeling. Overall, the chemical, biological, and computational studies reveal the therapeutic potential of CNA analogues (BzCNA and MeCNA) against oxidative-stress induced muscle atrophy in C2C12 cells.
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Affiliation(s)
- Prachi Gupta
- Skeletal Muscle Laboratory, Institute of Integrated and Honors Studies, Kurukshetra University, Kurukshetra, Haryana 136119, India
| | - Nirmaljeet Kaur
- Skeletal Muscle Laboratory, Institute of Integrated and Honors Studies, Kurukshetra University, Kurukshetra, Haryana 136119, India
| | - Vinod Kumar
- Department of Chemistry, Central University, Mahendergarh, Haryana, India
| | - Amit Gupta
- Department of Chemistry, Dronacharya Government College, Gurugram, Haryana, India
| | - Sanjeev Gupta
- Skeletal Muscle Laboratory, Institute of Integrated and Honors Studies, Kurukshetra University, Kurukshetra, Haryana 136119, India
| | - Anita Dua
- Skeletal Muscle Laboratory, Institute of Integrated and Honors Studies, Kurukshetra University, Kurukshetra, Haryana 136119, India
| | - Elisha Injeti
- Department of Pharmaceutical Sciences, Cedarville University School of Pharmacy, Cedarville, OH, USA
| | - Ashwani Mittal
- Skeletal Muscle Laboratory, Institute of Integrated and Honors Studies, Kurukshetra University, Kurukshetra, Haryana 136119, India.
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7
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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] [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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8
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Conte F, Ashikov A, Mijdam R, van de Ven EGP, van Scherpenzeel M, Veizaj R, Mahalleh-Yousefi SP, Post MA, Huijben K, Panneman DM, Rodenburg RJT, Voermans NC, Garanto A, Koopman WJH, Wessels HJCT, Noga MJ, Lefeber DJ. In Vitro Skeletal Muscle Model of PGM1 Deficiency Reveals Altered Energy Homeostasis. Int J Mol Sci 2023; 24:ijms24098247. [PMID: 37175952 PMCID: PMC10179458 DOI: 10.3390/ijms24098247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 04/03/2023] [Accepted: 04/25/2023] [Indexed: 05/15/2023] Open
Abstract
Phosphoglucomutase 1 (PGM1) is a key enzyme for the regulation of energy metabolism from glycogen and glycolysis, as it catalyzes the interconversion of glucose 1-phosphate and glucose 6-phosphate. PGM1 deficiency is an autosomal recessive disorder characterized by a highly heterogenous clinical spectrum, including hypoglycemia, cleft palate, liver dysfunction, growth delay, exercise intolerance, and dilated cardiomyopathy. Abnormal protein glycosylation has been observed in this disease. Oral supplementation with D-galactose efficiently restores protein glycosylation by replenishing the lacking pool of UDP-galactose, and rescues some symptoms, such as hypoglycemia, hepatopathy, and growth delay. However, D-galactose effects on skeletal muscle and heart symptoms remain unclear. In this study, we established an in vitro muscle model for PGM1 deficiency to investigate the role of PGM1 and the effect of D-galactose on nucleotide sugars and energy metabolism. Genome-editing of C2C12 myoblasts via CRISPR/Cas9 resulted in Pgm1 (mouse homologue of human PGM1, according to updated nomenclature) knockout clones, which showed impaired maturation to myotubes. No difference was found for steady-state levels of nucleotide sugars, while dynamic flux analysis based on 13C6-galactose suggested a block in the use of galactose for energy production in knockout myoblasts. Subsequent analyses revealed a lower basal respiration and mitochondrial ATP production capacity in the knockout myoblasts and myotubes, which were not restored by D-galactose. In conclusion, an in vitro mouse muscle cell model has been established to study the muscle-specific metabolic mechanisms in PGM1 deficiency, which suggested that galactose was unable to restore the reduced energy production capacity.
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Affiliation(s)
- Federica Conte
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Angel Ashikov
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Rachel Mijdam
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Eline G P van de Ven
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | | | - Raisa Veizaj
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Seyed P Mahalleh-Yousefi
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Merel A Post
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Karin Huijben
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Daan M Panneman
- Radboud Center for Mitochondrial Medicine (RCMM), Department of Pediatrics, Amalia Children's Hospital, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
- Radboud Institute for Molecular Life Sciences (RIMLS), Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Richard J T Rodenburg
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
- Radboud Center for Mitochondrial Medicine (RCMM), Department of Pediatrics, Amalia Children's Hospital, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Nicol C Voermans
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Alejandro Garanto
- Department of Human Genetics, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
- Department of Pediatrics, Amalia Children's Hospital, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Werner J H Koopman
- Radboud Center for Mitochondrial Medicine (RCMM), Department of Pediatrics, Amalia Children's Hospital, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
- Radboud Institute for Molecular Life Sciences (RIMLS), Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
- Department of Pediatrics, Amalia Children's Hospital, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Hans J C T Wessels
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Marek J Noga
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Dirk J Lefeber
- Department of Neurology, Donders Institute for Brain, Cognition and Behavior, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
- Translational Metabolic Laboratory, Department of Laboratory Medicine, Radboud Institute for Molecular Life Sciences (RIMLS), Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
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Turner MC, Brett R, Saini A, Stewart CE, Renshaw D. Serum concentration impacts myosin heavy chain expression but not cellular respiration in human LHCN-M2 myoblasts undergoing differentiation. Exp Physiol 2023; 108:169-176. [PMID: 36621799 PMCID: PMC10103887 DOI: 10.1113/ep090564] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 12/09/2022] [Indexed: 01/10/2023]
Abstract
NEW FINDINGS What is the central question of this study? Does the concentration of human serum affect skeletal muscle differentiation and cellular respiration of LHCN-M2 myoblasts? What is the main finding and its importance? The concentration of serum used to differentiate LHCN-M2 skeletal muscle cells impacts the coverage of myosin heavy chain, a marker of terminally differentiated myotubes. Normalisation of mitochondrial function data to total protein negates the differences observed in absolute values, which differ as a result of increased protein content when differentiation occurs with increasing concentration of serum. ABSTRACT The human LHCN-M2 myoblast cell line has the potential to be used to investigate skeletal muscle development and metabolism. Experiments were performed to determine how different concentrations of human serum affect myogenic differentiation and mitochondrial function of LHCN-M2 cells. LHCN-M2 myoblasts were differentiated in serum-free medium, 0.5% or 2% human serum for 5 and 10 days. Myotube formation was assessed by immunofluorescence staining of myosin heavy chain (MHC) and molecularly by mRNA expression of Myogenic differentiation 1 (MYOD1) and Myoregulatory factor 5 (MYF5). Following differentiation, mitochondrial function was assessed to establish the impact of serum concentration on mitochondrial function. Time in differentiation increased mRNA expression of MYOD1 (day 5, 6.58 ± 1.33-fold; and day 10, 4.28 ± 1.71-fold) (P = 0.012), while suppressing the expression of MYF5 (day 5, 0.21 ± 0.11-fold; and day 10, 0.06 ± 0.03-fold) (P = 0.001), regardless of the serum concentration. Higher serum concentrations increased MHC area (serum free, 11.92 ± 0.85%; 0.5%, 23.10 ± 5.82%; 2%, 43.94 ± 8.92%) (P = 0.001). Absolute basal respiration approached significance (P = 0.06) with significant differences in baseline oxygen consumption rate (P = 0.025) and proton leak (P = 0.006) when differentiated in 2% human serum, but these were not different between conditions when normalised to total protein. Our findings show that increasing concentrations of serum of LHCN-M2 skeletal muscle cells into multinucleated myotubes, but this does not affect relative mitochondrial function.
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Affiliation(s)
- Mark C. Turner
- Centre for Sport, Exercise and Life SciencesInstitute for Health and WellbeingCoventry UniversityCoventryUK
| | - Ryan Brett
- Centre for Sport, Exercise and Life SciencesInstitute for Health and WellbeingCoventry UniversityCoventryUK
| | - Amarjit Saini
- Division of Clinical PhysiologyDepartment of Laboratory MedicineKarolinska, InstitutetKarolinska University Hospital HuddingeStockholmSweden
| | - Claire E. Stewart
- Research Institute of Sport and Exercise ScienceLife Sciences BuildingLiverpool John Moores UniversityLiverpoolUK
| | - Derek Renshaw
- Centre for Sport, Exercise and Life SciencesInstitute for Health and WellbeingCoventry UniversityCoventryUK
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10
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Osana S, Kitajima Y, Naoki S, Takada H, Murayama K, Kano Y, Nagatomi R. Little involvement of recycled-amino acids from proteasomal proteolysis in de novo protein synthesis. Biochem Biophys Res Commun 2022; 634:40-47. [DOI: 10.1016/j.bbrc.2022.09.113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2022] [Accepted: 09/28/2022] [Indexed: 11/27/2022]
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11
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Chen MM, Li Y, Deng SL, Zhao Y, Lian ZX, Yu K. Mitochondrial Function and Reactive Oxygen/Nitrogen Species in Skeletal Muscle. Front Cell Dev Biol 2022; 10:826981. [PMID: 35265618 PMCID: PMC8898899 DOI: 10.3389/fcell.2022.826981] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Accepted: 01/26/2022] [Indexed: 12/06/2022] Open
Abstract
Skeletal muscle fibers contain a large number of mitochondria, which produce ATP through oxidative phosphorylation (OXPHOS) and provide energy for muscle contraction. In this process, mitochondria also produce several types of "reactive species" as side product, such as reactive oxygen species and reactive nitrogen species which have attracted interest. Mitochondria have been proven to have an essential role in the production of skeletal muscle reactive oxygen/nitrogen species (RONS). Traditionally, the elevation in RONS production is related to oxidative stress, leading to impaired skeletal muscle contractility and muscle atrophy. However, recent studies have shown that the optimal RONS level under the action of antioxidants is a critical physiological signal in skeletal muscle. Here, we will review the origin and physiological functions of RONS, mitochondrial structure and function, mitochondrial dynamics, and the coupling between RONS and mitochondrial oxidative stress. The crosstalk mechanism between mitochondrial function and RONS in skeletal muscle and its regulation of muscle stem cell fate and myogenesis will also be discussed. In all, this review aims to describe a comprehensive and systematic network for the interaction between skeletal muscle mitochondrial function and RONS.
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Affiliation(s)
- Ming-Ming Chen
- College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Yan Li
- College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Shou-Long Deng
- NHC Key Laboratory of Human Disease Comparative Medicine, Institute of Laboratory Animal Sciences, Chinese Academy of Medical Sciences and Comparative Medicine Center, Peking Union Medical College, Beijing, China
| | - Yue Zhao
- College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Zheng-Xing Lian
- College of Animal Science and Technology, China Agricultural University, Beijing, China
| | - Kun Yu
- College of Animal Science and Technology, China Agricultural University, Beijing, China
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12
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TGF-β Induction of miR-143/145 Is Associated to Exercise Response by Influencing Differentiation and Insulin Signaling Molecules in Human Skeletal Muscle. Cells 2021; 10:cells10123443. [PMID: 34943951 PMCID: PMC8700369 DOI: 10.3390/cells10123443] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2021] [Revised: 11/26/2021] [Accepted: 12/01/2021] [Indexed: 12/17/2022] Open
Abstract
Physical training improves insulin sensitivity and can prevent type 2 diabetes (T2D). However, approximately 20% of individuals lack a beneficial outcome in glycemic control. TGF-β, identified as a possible upstream regulator involved in this low response, is also a potent regulator of microRNAs (miRNAs). The aim of this study was to elucidate the potential impact of TGF-β-driven miRNAs on individual exercise response. Non-targeted long and sncRNA sequencing analyses of TGF-β1-treated human skeletal muscle cells corroborated the effects of TGF-β1 on muscle cell differentiation, the induction of extracellular matrix components, and identified several TGF-β1-regulated miRNAs. qPCR validated a potent upregulation of miR-143-3p/145-5p and miR-181a2-5p by TGF-β1 in both human myoblasts and differentiated myotubes. Healthy subjects who were overweight or obese participated in a supervised 8-week endurance training intervention (n = 40) and were categorized as responder or low responder in glycemic control based on fold change ISIMats (≥+1.1 or <+1.1, respectively). In skeletal muscle biopsies of low responders, TGF-β signaling and miR-143/145 cluster levels were induced by training at much higher rates than among responders. Target-mining revealed HDACs, MYHs, and insulin signaling components INSR and IRS1 as potential miR-143/145 cluster targets. All these targets were down-regulated in TGF-β1-treated myotubes. Transfection of miR-143-3p/145-5p mimics in differentiated myotubes validated MYH1, MYH4, and IRS1 as miR-143/145 cluster targets. Elevated TGF-β signaling and miR-143/145 cluster induction in skeletal muscle of low responders might obstruct improvements in insulin sensitivity by training in two ways: by a negative impact of miR-143-3p on muscle cell fusion and myofiber functionality and by directly impairing insulin signaling via a reduction in INSR by TGF-β and finetuned IRS1 suppression by miR-143-3p.
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13
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Control of satellite cell function in muscle regeneration and its disruption in ageing. Nat Rev Mol Cell Biol 2021; 23:204-226. [PMID: 34663964 DOI: 10.1038/s41580-021-00421-2] [Citation(s) in RCA: 151] [Impact Index Per Article: 50.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/01/2021] [Indexed: 12/19/2022]
Abstract
Skeletal muscle contains a designated population of adult stem cells, called satellite cells, which are generally quiescent. In homeostasis, satellite cells proliferate only sporadically and usually by asymmetric cell division to replace myofibres damaged by daily activity and maintain the stem cell pool. However, satellite cells can also be robustly activated upon tissue injury, after which they undergo symmetric divisions to generate new stem cells and numerous proliferating myoblasts that later differentiate to muscle cells (myocytes) to rebuild the muscle fibre, thereby supporting skeletal muscle regeneration. Recent discoveries show that satellite cells have a great degree of population heterogeneity, and that their cell fate choices during the regeneration process are dictated by both intrinsic and extrinsic mechanisms. Extrinsic cues come largely from communication with the numerous distinct stromal cell types in their niche, creating a dynamically interactive microenvironment. This Review discusses the role and regulation of satellite cells in skeletal muscle homeostasis and regeneration. In particular, we highlight the cell-intrinsic control of quiescence versus activation, the importance of satellite cell-niche communication, and deregulation of these mechanisms associated with ageing. The increasing understanding of how satellite cells are regulated will help to advance muscle regeneration and rejuvenation therapies.
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14
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Methods for Proteomics-Based Analysis of the Human Muscle Secretome Using an In Vitro Exercise Model. Methods Mol Biol 2021; 2261:433-442. [PMID: 33421006 DOI: 10.1007/978-1-0716-1186-9_27] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
Over the last decade, the skeletal muscle as a secretory organ has gained importance. A growing number of peptides is described which are produced and released by the muscle fibers and work in an autocrine, paracrine, and endocrine fashion. The contraction-induced secretion of these myokines is considered to contribute to the health promoting effects of exercise. To gain further insights into the molecular processes that occur during contraction, an in vitro exercise model, electric pulse stimulation (EPS), was established. Recent publications show that this model is suitable to electrostimulate human skeletal muscle cells and thus mimic muscle contraction in vitro. Here, we provide a detailed protocol for the proteomics-based analysis of the human muscle secretome, starting with the cultivation of human myotubes and ending with sample preparation for targeted and untargeted proteome analysis of the cell culture supernatant. This workflow should allow for deeper insights into the complex nature of the muscle secretome and the identification of new myokines which might help to understand the cross talk of the working muscle with different organs and the beneficial effects of exercise.
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15
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Conte E, Pannunzio A, Imbrici P, Camerino GM, Maggi L, Mora M, Gibertini S, Cappellari O, De Luca A, Coluccia M, Liantonio A. Gain-of-Function STIM1 L96V Mutation Causes Myogenesis Alteration in Muscle Cells From a Patient Affected by Tubular Aggregate Myopathy. Front Cell Dev Biol 2021; 9:635063. [PMID: 33718371 PMCID: PMC7952532 DOI: 10.3389/fcell.2021.635063] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2020] [Accepted: 02/02/2021] [Indexed: 12/13/2022] Open
Abstract
Tubular Aggregate Myopathy (TAM) is a hereditary ultra-rare muscle disorder characterized by muscle weakness and cramps or myasthenic features. Biopsies from TAM patients show the presence of tubular aggregates originated from sarcoplasmic reticulum due to altered Ca2+ homeostasis. TAM is caused by gain-of-function mutations in STIM1 or ORAI1, proteins responsible for Store-Operated-Calcium-Entry (SOCE), a pivotal mechanism in Ca2+ signaling. So far there is no cure for TAM and the mechanisms through which STIM1 or ORAI1 gene mutation lead to muscle dysfunction remain to be clarified. It has been established that post-natal myogenesis critically relies on Ca2+ influx through SOCE. To explore how Ca2+ homeostasis dysregulation associated with TAM impacts on muscle differentiation cascade, we here performed a functional characterization of myoblasts and myotubes deriving from patients carrying STIM1 L96V mutation by using fura-2 cytofluorimetry, high content imaging and real-time PCR. We demonstrated a higher resting Ca2+ concentration and an increased SOCE in STIM1 mutant compared with control, together with a compensatory down-regulation of genes involved in Ca2+ handling (RyR1, Atp2a1, Trpc1). Differentiating STIM1 L96V myoblasts persisted in a mononuclear state and the fewer multinucleated myotubes had distinct morphology and geometry of mitochondrial network compared to controls, indicating a defect in the late differentiation phase. The alteration in myogenic pathway was confirmed by gene expression analysis regarding early (Myf5, Mef2D) and late (DMD, Tnnt3) differentiation markers together with mitochondrial markers (IDH3A, OGDH). We provided evidences of mechanisms responsible for a defective myogenesis associated to TAM mutant and validated a reliable cellular model usefull for TAM preclinical studies.
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Affiliation(s)
- Elena Conte
- Department of Pharmacy-Drug Sciences, University of Bari, Bari, Italy
| | | | - Paola Imbrici
- Department of Pharmacy-Drug Sciences, University of Bari, Bari, Italy
| | | | - Lorenzo Maggi
- Neuromuscular Diseases and Neuroimmunology Unit, Foundation IRCCS Neurological Institute C. Besta, Milan, Italy
| | - Marina Mora
- Neuromuscular Diseases and Neuroimmunology Unit, Foundation IRCCS Neurological Institute C. Besta, Milan, Italy
| | - Sara Gibertini
- Neuromuscular Diseases and Neuroimmunology Unit, Foundation IRCCS Neurological Institute C. Besta, Milan, Italy
| | | | - Annamaria De Luca
- Department of Pharmacy-Drug Sciences, University of Bari, Bari, Italy
| | - Mauro Coluccia
- Department of Pharmacy-Drug Sciences, University of Bari, Bari, Italy
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16
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Wilcox-Hagerty J, Xu H, Hain BA, Arnold AC, Waning DL. Bone metastases induce metabolic changes and mitophagy in mice. Exp Physiol 2021; 106:506-518. [PMID: 33369797 PMCID: PMC7855482 DOI: 10.1113/ep089130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Accepted: 12/19/2020] [Indexed: 11/08/2022]
Abstract
NEW FINDINGS What is the central question of this study? Cachexia causes severe changes in skeletal muscle metabolism and function and is a key predictor of negative outcomes in cancer patients: what are the changes in whole animal energy metabolism and mitochondria in skeletal muscle? What is the main finding and its importance? There is decreased whole animal energy expenditure in mice with cachexia. They displayed highly dysmorphic mitochondria and mitophagy in skeletal muscle. ABSTRACT Cachexia causes changes in skeletal muscle metabolism. Mice with MDA-MB-231 breast cancer bone metastases and cachexia have decreased whole animal energy metabolism and increased skeletal muscle mitophagy. We examined whole animal energy metabolism by indirect calorimetry in mice with MDA-MB-231 breast cancer bone metastases, and showed decreased energy expenditure. We also examined skeletal muscle mitochondria and found that mitochondria in mice with MDA-MB-231 bone metastases are highly dysmorphic and have altered protein markers of mitochondrial biogenesis and dynamics. In addition, LC3B protein was increased in mitochondria of skeletal muscle from cachectic mice, and colocalized with the mitochondrial protein Tom20. Our data demonstrate the importance of mitophagy in cachexia. Understanding these changes will help contribute to defining treatments for cancer cachexia.
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Affiliation(s)
- Jenna Wilcox-Hagerty
- The Penn State College of Medicine, Department of Cellular and Molecular Physiology, Hershey, PA, USA
| | - Haifang Xu
- The Penn State College of Medicine, Department of Cellular and Molecular Physiology, Hershey, PA, USA
| | - Brian A Hain
- The Penn State College of Medicine, Department of Cellular and Molecular Physiology, Hershey, PA, USA
| | - Amy C Arnold
- The Penn State College of Medicine, Department of Neural and Behavioral Sciences, Hershey, PA, USA
| | - David L Waning
- The Penn State College of Medicine, Department of Cellular and Molecular Physiology, Hershey, PA, USA
- Penn State Cancer Institute, Hershey, PA, USA
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17
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McIlvenna LC, Patten RK, McAinch AJ, Rodgers RJ, Stepto NK, Moreno-Asso A. Transforming Growth Factor Beta 1 Alters Glucose Uptake but Not Insulin Signalling in Human Primary Myotubes From Women With and Without Polycystic Ovary Syndrome. Front Endocrinol (Lausanne) 2021; 12:732338. [PMID: 34707569 PMCID: PMC8544291 DOI: 10.3389/fendo.2021.732338] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 09/22/2021] [Indexed: 12/24/2022] Open
Abstract
Women with polycystic ovary syndrome (PCOS), commonly have profound skeletal muscle insulin resistance which can worsen other clinical features. The heterogeneity of the condition has made it challenging to identify the precise mechanisms that cause this insulin resistance. A possible explanation for the underlying insulin resistance may be the dysregulation of Transforming Growth Factor-beta (TGFβ) signalling. TGFβ signalling contributes to the remodelling of reproductive and hepatic tissues in women with PCOS. Given the systemic nature of TGFβ signalling and its role in skeletal muscle homeostasis, it may be possible that these adverse effects extend to other peripheral tissues. We aimed to determine if TGFβ1 could negatively regulate glucose uptake and insulin signalling in skeletal muscle of women with PCOS. We show that both myotubes from women with PCOS and healthy women displayed an increase in glucose uptake, independent of changes in insulin signalling, following short term (16 hr) TGFβ1 treatment. This increase occurred despite pro-fibrotic signalling increasing via SMAD3 and connective tissue growth factor in both groups following treatment with TGFβ1. Collectively, our findings show that short-term treatment with TGFβ1 does not appear to influence insulin signalling or promote insulin resistance in myotubes. These findings suggest that aberrant TGFβ signalling is unlikely to directly contribute to skeletal muscle insulin resistance in women with PCOS in the short term but does not rule out indirect or longer-term effects.
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Affiliation(s)
- Luke C. McIlvenna
- Institute for Health and Sport, Victoria University, Melbourne, VIC, Australia
| | - Rhiannon K. Patten
- Institute for Health and Sport, Victoria University, Melbourne, VIC, Australia
| | - Andrew J. McAinch
- Institute for Health and Sport, Victoria University, Melbourne, VIC, Australia
- Australian Institute for Musculoskeletal Science (AIMSS), Victoria University, Melbourne, VIC, Australia
| | - Raymond J. Rodgers
- Discipline of Obstetrics and Gynaecology, School of Medicine, Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
| | - Nigel K. Stepto
- Institute for Health and Sport, Victoria University, Melbourne, VIC, Australia
- Australian Institute for Musculoskeletal Science (AIMSS), Victoria University, Melbourne, VIC, Australia
| | - Alba Moreno-Asso
- Institute for Health and Sport, Victoria University, Melbourne, VIC, Australia
- Australian Institute for Musculoskeletal Science (AIMSS), Victoria University, Melbourne, VIC, Australia
- *Correspondence: Alba Moreno-Asso,
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18
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Muniz MMM, Fonseca LFS, Dos Santos Silva DB, de Oliveira HR, Baldi F, Chardulo AL, Ferro JA, Cánovas A, de Albuquerque LG. Identification of novel mRNA isoforms associated with meat tenderness using RNA sequencing data in beef cattle. Meat Sci 2020; 173:108378. [PMID: 33248741 DOI: 10.1016/j.meatsci.2020.108378] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2020] [Revised: 11/17/2020] [Accepted: 11/18/2020] [Indexed: 12/24/2022]
Abstract
The Warner-Bratzler shear force (WBSF) and myofibrillar fragmentation index (MFI) are complementary methodologies used to measure beef tenderness. Longissimus thoracis samples from the 20 most extreme bulls (out of 80 bulls set) for WBSF (tender (n = 10) and tough (n = 10)) and MFI (high (n = 10) and low (n = 10)) traits were collected to perform transcriptomic analysis using RNA-Sequencing. All analysis were performed through CLC Genomics Workbench. A total of 39 and 27 transcripts for WBSF and MFI phenotypes were DE, respectively. The possible DE novel mRNA isoforms, for WBSF and MFI traits, are myosin encoders (e.g. MYL1 and MYL6). In addition, we identified potential mRNA isoforms related to genes affecting the speed fibers degradation during the meat aging process. The DE novel transcripts are transcripted by genes with biological functions related to oxidative process, energy production and striated muscle contraction. The results suggest that the identified mRNA isoforms could be used as potential candidate to select animals in order to improve meat tenderness.
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Affiliation(s)
- Maria Malane Magalhães Muniz
- School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil; Centre for Genetic Improvement of Livestock, Department of Animal Biosciences, University of Guelph, Guelph, ON, Canada.
| | | | | | - Hinayah Rojas de Oliveira
- Centre for Genetic Improvement of Livestock, Department of Animal Biosciences, University of Guelph, Guelph, ON, Canada
| | - Fernando Baldi
- School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil; National Council for Scientific and Technological Development (CNPq), Brazil
| | - Artur Loyola Chardulo
- National Council for Scientific and Technological Development (CNPq), Brazil; São Paulo State University (Unesp), College of Veterinary and Animal Science, Botucatu, SP, Brazil
| | - Jesus Aparecido Ferro
- School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil; National Council for Scientific and Technological Development (CNPq), Brazil
| | - Angela Cánovas
- Centre for Genetic Improvement of Livestock, Department of Animal Biosciences, University of Guelph, Guelph, ON, Canada
| | - Lucia Galvão de Albuquerque
- School of Agricultural and Veterinarian Sciences, São Paulo State University (Unesp), Jaboticabal, SP, Brazil; National Council for Scientific and Technological Development (CNPq), Brazil.
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19
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Bagheri HS, Bani F, Tasoglu S, Zarebkohan A, Rahbarghazi R, Sokullu E. Mitochondrial donation in translational medicine; from imagination to reality. J Transl Med 2020; 18:367. [PMID: 32977804 PMCID: PMC7517067 DOI: 10.1186/s12967-020-02529-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 09/15/2020] [Indexed: 02/07/2023] Open
Abstract
The existence of active crosstalk between cells in a paracrine and juxtacrine manner dictates specific activity under physiological and pathological conditions. Upon juxtacrine interaction between the cells, various types of signaling molecules and organelles are regularly transmitted in response to changes in the microenvironment. To date, it has been well-established that numerous parallel cellular mechanisms participate in the mitochondrial transfer to modulate metabolic needs in the target cells. Since the conception of stem cells activity in the restoration of tissues’ function, it has been elucidated that these cells possess a unique capacity to deliver the mitochondrial package to the juxtaposed cells. The existence of mitochondrial donation potentiates the capacity of modulation in the distinct cells to achieve better therapeutic effects. This review article aims to scrutinize the current knowledge regarding the stem cell’s mitochondrial transfer capacity and their regenerative potential.
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Affiliation(s)
- Hesam Saghaei Bagheri
- School of Medicine, Biophysics Department, Koç University, Rumeli Fener, Sarıyer, Istanbul, Turkey.,Koç University Translational Medicine Research Center (KUTTAM) Rumeli Feneri, Sarıyer, Istanbul, Turkey
| | - Farhad Bani
- Department of Medical Nanotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Savas Tasoglu
- Koç University Translational Medicine Research Center (KUTTAM) Rumeli Feneri, Sarıyer, Istanbul, Turkey.,Faculty of Engineering, Mechanical Engineering Department, Koç University, Rumeli Feneri Yolu, Sarıyer, Istanbul, Turkey
| | - Amir Zarebkohan
- Department of Medical Nanotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Reza Rahbarghazi
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. .,Department of Applied Cell Sciences, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Imam Reza St., Daneshgah St., 51666-14756, Tabriz, Iran.
| | - Emel Sokullu
- School of Medicine, Biophysics Department, Koç University, Rumeli Fener, Sarıyer, Istanbul, Turkey. .,Koç University Translational Medicine Research Center (KUTTAM) Rumeli Feneri, Sarıyer, Istanbul, Turkey.
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20
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Bhattacharya D, Scimè A. Mitochondrial Function in Muscle Stem Cell Fates. Front Cell Dev Biol 2020; 8:480. [PMID: 32612995 PMCID: PMC7308489 DOI: 10.3389/fcell.2020.00480] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 05/22/2020] [Indexed: 01/25/2023] Open
Abstract
Mitochondria are crucial organelles that control cellular metabolism through an integrated mechanism of energy generation via oxidative phosphorylation. Apart from this canonical role, it is also integral for ROS production, fatty acid metabolism and epigenetic remodeling. Recently, a role for the mitochondria in effecting stem cell fate decisions has gained considerable interest. This is important for skeletal muscle, which exhibits a remarkable property for regeneration following injury, owing to satellite cells (SCs), the adult myogenic stem cells. Mitochondrial function is associated with maintaining and dictating SC fates, linked to metabolic programming during quiescence, activation, self-renewal, proliferation and differentiation. Notably, mitochondrial adaptation might take place to alter SC fates and function in the presence of different environmental cues. This review dissects the contribution of mitochondria to SC operational outcomes, focusing on how their content, function, dynamics and adaptability work to influence SC fate decisions.
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Affiliation(s)
| | - Anthony Scimè
- Molecular, Cellular and Integrative Physiology, Faculty of Health, York University, Toronto, ON, Canada
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21
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Fessel J. Ineffective levels of transforming growth factors and their receptor account for old age being a risk factor for Alzheimer's disease. ALZHEIMERS & DEMENTIA-TRANSLATIONAL RESEARCH & CLINICAL INTERVENTIONS 2019; 5:899-905. [PMID: 31890854 PMCID: PMC6926356 DOI: 10.1016/j.trci.2019.11.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
After the midninth decade of age, the incidence rates of Alzheimer's disease (AD) and the presence of active TGF-β1 show comparable increases. The hypothesis is proposed that the reason why advanced age is a major risk factor for AD is a progressive decrease with advancing age in the numbers of TGFR2 receptors in the brain, with the consequence of a decline in the neurotrophic efficacy of TGF-β1 and 2 despite their already increased levels in older persons. Alternative, possible reasons are discussed but rejected because either those reasons may also affect young persons or because they cannot be validated in a clinical trial. The proposed hypothesis may be validated in persons with aMCI after raising their brain levels of TGF-β1 and 2 by using a combination of three drugs, lithium, memantine, plus either glatiramer or venlafaxine, and then assessing their progression to AD.
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Affiliation(s)
- Jeffrey Fessel
- Emeritus, Department of Medicine, University of California, San Francisco, San Francisco, CA, USA
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22
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Davegårdh C, Hall Wedin E, Broholm C, Henriksen TI, Pedersen M, Pedersen BK, Scheele C, Ling C. Sex influences DNA methylation and gene expression in human skeletal muscle myoblasts and myotubes. Stem Cell Res Ther 2019; 10:26. [PMID: 30646953 PMCID: PMC6332625 DOI: 10.1186/s13287-018-1118-4] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 12/07/2018] [Accepted: 12/20/2018] [Indexed: 12/12/2022] Open
Abstract
Background Sex differences are known to impact muscle phenotypes, metabolism, and disease risk. Skeletal muscle stem cells (satellite cells) are important for muscle repair and to maintain functional skeletal muscle. Here we studied, for the first time, effects of sex on DNA methylation and gene expression in primary human myoblasts (activated satellite cells) before and after differentiation into myotubes. Method We used an array-based approach to analyse genome-wide DNA methylation and gene expression in myoblasts and myotubes from 13 women and 13 men. The results were followed up with a reporter gene assay. Results Genome-wide DNA methylation and gene expression differences between the sexes were detected in both myoblasts and myotubes, on the autosomes as well as the X-chromosome, despite lack of exposure to sex hormones and other factors that differ between sexes. Pathway analysis revealed higher expression of oxidative phosphorylation and other metabolic pathways in myoblasts from women compared to men. Oxidative phosphorylation was also enriched among genes with higher expression in myotubes from women. Forty genes in myoblasts and 9 in myotubes had differences in both DNA methylation and gene expression between the sexes, including LAMP2 and SIRT1 in myoblasts and KDM6A in myotubes. Furthermore, increased DNA methylation of LAMP2 promoter had negative effects on reporter gene expression. Five genes (CREB5, RPS4X, SYAP1, XIST, and ZRSR2) showed differential DNA methylation and gene expression between the sexes in both myoblasts and myotubes. Interestingly, differences in DNA methylation and expression between women and men were also found during differentiation (myoblasts versus myotubes), e.g., in genes involved in energy metabolism. Interestingly, more DNA methylation changes occur in women compared to men on autosomes. Conclusion All together, we show that epigenetic and transcriptional differences exist in human myoblasts and myotubes as well as during differentiation between women and men. We believe that these intrinsic differences might contribute to sex dependent differences in muscular phenotypes. Electronic supplementary material The online version of this article (10.1186/s13287-018-1118-4) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Cajsa Davegårdh
- Department of Clinical Sciences, Lund University Diabetes Centre, Lund University, Scania University Hospital, 20502, Malmö, Sweden.
| | - Elin Hall Wedin
- Department of Clinical Sciences, Lund University Diabetes Centre, Lund University, Scania University Hospital, 20502, Malmö, Sweden
| | - Christa Broholm
- Department of Endocrinology, Rigshospitalet, 2100, Copenhagen, Denmark.,The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Tora Ida Henriksen
- Department of Endocrinology, Rigshospitalet, 2100, Copenhagen, Denmark.,The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Maria Pedersen
- The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Bente Klarlund Pedersen
- The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Camilla Scheele
- The Centre of Inflammation and Metabolism and the Centre for Physical Activity Research, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark.,Novo Nordisk Foundation Center, Section for Basic Metabolic Research, Faculty of Health and Medical Science, University of Copenhagen, Copenhagen, Denmark
| | - Charlotte Ling
- Department of Clinical Sciences, Lund University Diabetes Centre, Lund University, Scania University Hospital, 20502, Malmö, Sweden.
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23
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Franko A, Kovarova M, Feil S, Feil R, Wagner R, Heni M, Königsrainer A, Ruoß M, Nüssler AK, Weigert C, Häring HU, Lutz SZ, Peter A. cGMP-dependent protein kinase I (cGKI) modulates human hepatic stellate cell activation. Metabolism 2018; 88:22-30. [PMID: 30195474 DOI: 10.1016/j.metabol.2018.09.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 08/23/2018] [Accepted: 09/03/2018] [Indexed: 02/07/2023]
Abstract
BACKGROUND The activation of hepatic stellate cells (HSCs) plays a crucial role in liver fibrosis, however the role of HSCs is less understood in hepatic insulin resistance. Since in the liver cGMP-dependent protein kinase I (cGKI) was detected in HSC but not in hepatocytes, and cGKI-deficient mice that express cGKI selectively in smooth muscle but not in other cell types (cGKI-SM mice) displayed hepatic insulin resistance, we hypothesized that cGKI modulates HSC activation and insulin sensitivity. MATERIALS AND METHODS To study stellate cell activation in cGKI-SM mice, retinol storage and gene expression were studied. Moreover, in the human stellate cell line LX2, the consequences of cGKI-silencing on gene expression were investigated. Finally, cGKI expression was examined in human liver biopsies covering a wide range of liver fat content. RESULTS Retinyl-ester concentrations in the liver of cGKI-SM mice were lower compared to wild-type animals, which was associated with disturbed expression of genes involved in retinol metabolism and inflammation. cGKI-silenced LX2 cells showed an mRNA expression profile of stellate cell activation, altered matrix degradation and activated chemokine expression. On the other hand, activation of LX2 cells suppressed cGKI expression. In accordance with this finding, in human liver biopsies, we observed a negative correlation between cGKI mRNA and liver fat content. CONCLUSIONS These results suggest that the lack of cGKI possibly leads to stellate cell activation, which stimulates chemokine expression and activates inflammatory processes, which could disturb hepatic insulin sensitivity.
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Affiliation(s)
- Andras Franko
- Department of Internal Medicine IV, Division of Endocrinology, Diabetology, Angiology, Nephrology and Clinical Chemistry, University Hospital Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; Institute for Diabetes Research and Metabolic Diseases, Helmholtz Center Munich, University of Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; German Center for Diabetes Research (DZD e.V.), Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
| | - Marketa Kovarova
- Department of Internal Medicine IV, Division of Endocrinology, Diabetology, Angiology, Nephrology and Clinical Chemistry, University Hospital Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; Institute for Diabetes Research and Metabolic Diseases, Helmholtz Center Munich, University of Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; German Center for Diabetes Research (DZD e.V.), Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
| | - Susanne Feil
- Interfakultäres Institut für Biochemie, University of Tübingen, Hoppe-Seyler-Str. 4, 72076 Tübingen, Germany
| | - Robert Feil
- Interfakultäres Institut für Biochemie, University of Tübingen, Hoppe-Seyler-Str. 4, 72076 Tübingen, Germany
| | - Robert Wagner
- Department of Internal Medicine IV, Division of Endocrinology, Diabetology, Angiology, Nephrology and Clinical Chemistry, University Hospital Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; Institute for Diabetes Research and Metabolic Diseases, Helmholtz Center Munich, University of Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; German Center for Diabetes Research (DZD e.V.), Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
| | - Martin Heni
- Department of Internal Medicine IV, Division of Endocrinology, Diabetology, Angiology, Nephrology and Clinical Chemistry, University Hospital Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; Institute for Diabetes Research and Metabolic Diseases, Helmholtz Center Munich, University of Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; German Center for Diabetes Research (DZD e.V.), Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
| | - Alfred Königsrainer
- Department of General, Visceral and Transplant Surgery, University Hospital Tübingen, Hoppe-Seyler-Straße 3, 72076 Tübingen, Germany
| | - Marc Ruoß
- Department of Traumatology, BG Trauma Clinic, Siegfried Weller Institute for Trauma Research, Eberhard Karls Universität Tübingen, Schnarrenbergstr. 95, 72076 Tübingen, Germany
| | - Andreas K Nüssler
- Department of Traumatology, BG Trauma Clinic, Siegfried Weller Institute for Trauma Research, Eberhard Karls Universität Tübingen, Schnarrenbergstr. 95, 72076 Tübingen, Germany
| | - Cora Weigert
- Department of Internal Medicine IV, Division of Endocrinology, Diabetology, Angiology, Nephrology and Clinical Chemistry, University Hospital Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; Institute for Diabetes Research and Metabolic Diseases, Helmholtz Center Munich, University of Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; German Center for Diabetes Research (DZD e.V.), Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
| | - Hans-Ulrich Häring
- Department of Internal Medicine IV, Division of Endocrinology, Diabetology, Angiology, Nephrology and Clinical Chemistry, University Hospital Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; Institute for Diabetes Research and Metabolic Diseases, Helmholtz Center Munich, University of Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; German Center for Diabetes Research (DZD e.V.), Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
| | - Stefan Z Lutz
- Department of Internal Medicine IV, Division of Endocrinology, Diabetology, Angiology, Nephrology and Clinical Chemistry, University Hospital Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; Institute for Diabetes Research and Metabolic Diseases, Helmholtz Center Munich, University of Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; German Center for Diabetes Research (DZD e.V.), Ingolstädter Landstraße 1, 85764 Neuherberg, Germany.
| | - Andreas Peter
- Department of Internal Medicine IV, Division of Endocrinology, Diabetology, Angiology, Nephrology and Clinical Chemistry, University Hospital Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; Institute for Diabetes Research and Metabolic Diseases, Helmholtz Center Munich, University of Tübingen, Otfried-Müller-Str 10, 72076 Tübingen, Germany; German Center for Diabetes Research (DZD e.V.), Ingolstädter Landstraße 1, 85764 Neuherberg, Germany
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24
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Impaired myogenic development, differentiation and function in hESC-derived SMA myoblasts and myotubes. PLoS One 2018; 13:e0205589. [PMID: 30304024 PMCID: PMC6179271 DOI: 10.1371/journal.pone.0205589] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 09/27/2018] [Indexed: 12/11/2022] Open
Abstract
Spinal muscular atrophy (SMA) is a severe genetic disorder that manifests in progressive neuromuscular degeneration. SMA originates from loss-of-function mutations of the SMN1 (Survival of Motor Neuron 1) gene. Recent evidence has implicated peripheral deficits, especially in skeletal muscle, as key contributors to disease progression in SMA. In this study we generated myogenic cells from two SMA-affected human embryonic stem cell (hESC) lines with deletion of SMN1 bearing two copies of the SMN2 gene and recapitulating the molecular phenotype of Type 1 SMA. We characterized myoblasts and myotubes by comparing them to two unaffected, control hESC lines and demonstrate that SMA myoblasts and myotubes showed altered expression of various myogenic markers, which translated into an impaired in vitro myogenic maturation and development process. Additionally, we provide evidence that these SMN1 deficient cells display functional deficits in cholinergic calcium signaling response, glycolysis and oxidative phosphorylation. Our data describe a novel human myogenic SMA model that might be used for interrogating the effect of SMN depletion during skeletal muscle development, and as model to investigate biological mechanisms targeting myogenic differentiation, mitochondrial respiration and calcium signaling processes in SMA muscle cells.
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