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Chiang WY, Yu HW, Wu MC, Huang YM, Chen YQ, Lin JW, Liu YW, You LR, Chiou A, Kuo JC. Matrix mechanics regulates muscle regeneration by modulating kinesin-1 activity. Biomaterials 2024; 308:122551. [PMID: 38593710 DOI: 10.1016/j.biomaterials.2024.122551] [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: 07/24/2023] [Revised: 03/22/2024] [Accepted: 03/25/2024] [Indexed: 04/11/2024]
Abstract
Sarcopenia, a prevalent muscle disease characterized by muscle mass and strength reduction, is associated with impaired skeletal muscle regeneration. However, the influence of the biomechanical properties of sarcopenic skeletal muscle on the efficiency of the myogenic program remains unclear. Herein, we established a mouse model of sarcopenia and observed a reduction in stiffness within the sarcopenic skeletal muscle in vivo. To investigate whether the biomechanical properties of skeletal muscle directly impact the myogenic program, we established an in vitro system to explore the intrinsic mechanism involving matrix stiffness control of myogenic differentiation. Our findings identify the microtubule motor protein, kinesin-1, as a mechano-transduction hub that senses and responds to matrix stiffness, crucial for myogenic differentiation and muscle regeneration. Specifically, kinesin-1 activity is positively regulated by stiff matrices, facilitating its role in transporting mitochondria and enhancing translocation of the glucose transporter GLUT4 to the cell surface for glucose uptake. Conversely, the softer matrices significantly suppress kinesin-1 activity, leading to the accumulation of mitochondria around nuclei and hindering glucose uptake by inhibiting GLUT4 membrane translocation, consequently impairing myogenic differentiation. The insights gained from the in-vitro system highlight the mechano-transduction significance of kinesin-1 motor proteins in myogenic differentiation. Furthermore, our study confirms that enhancing kinesin-1 activity in the sarcopenic mouse model restores satellite cell expansion, myogenic differentiation, and muscle regeneration. Taken together, our findings provide a potential target for improving muscle regeneration in sarcopenia.
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Affiliation(s)
- Wan-Yu Chiang
- Institute of Biochemistry and Molecular Biology, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan
| | - Helen Wenshin Yu
- Institute of Biochemistry and Molecular Biology, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan
| | - Ming-Chung Wu
- Institute of Biochemistry and Molecular Biology, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan
| | - Yi-Man Huang
- Institute of Biochemistry and Molecular Biology, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan
| | - Yin-Quan Chen
- Cancer and Immunology Research Center, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan
| | - Jong-Wei Lin
- Institute of Biochemistry and Molecular Biology, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan
| | - Yen-Wenn Liu
- Institute of Biochemistry and Molecular Biology, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan
| | - Li-Ru You
- Institute of Biochemistry and Molecular Biology, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan
| | - Arthur Chiou
- Institute of Biophotonics, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan
| | - Jean-Cheng Kuo
- Institute of Biochemistry and Molecular Biology, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan; Cancer and Immunology Research Center, National Yang Ming Chiao Tung University, Taipei, 11221, Taiwan.
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2
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Mundell JW, Brier MI, Orloff E, Stanley SA, Dordick JS. Alternating magnetic fields drive stimulation of gene expression via generation of reactive oxygen species. iScience 2024; 27:109186. [PMID: 38420587 PMCID: PMC10901079 DOI: 10.1016/j.isci.2024.109186] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2023] [Revised: 12/23/2023] [Accepted: 02/06/2024] [Indexed: 03/02/2024] Open
Abstract
Magnetogenetics represents a method for remote control of cellular function. Previous work suggests that generation of reactive oxygen species (ROS) initiates downstream signaling. Herein, a chemical biology approach was used to elucidate further the mechanism of radio frequency-alternating magnetic field (RF-AMF) stimulation of a TRPV1-ferritin magnetogenetics platform that leads to Ca2+ flux. RF-AMF stimulation of HEK293T cells expressing TRPV1-ferritin resulted in ∼30% and ∼140% increase in intra- and extracellular ROS levels, respectively. Mutations to specific cysteine residues in TRPV1 responsible for ROS sensitivity eliminated RF-AMF driven Ca2+-dependent transcription of secreted embryonic alkaline phosphatase (SEAP). Using a non-tethered (to TRPV1) ferritin also eliminated RF-AMF driven SEAP production, and using specific inhibitors, ROS-activated TRPV1 signaling involves protein kinase C, NADPH oxidase, and the endoplasmic reticulum. These results suggest ferritin-dependent ROS activation of TRPV1 plays a key role in the initiation of magnetogenetics, and provides relevance for potential applications in medicine and biotechnology.
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Affiliation(s)
- Jordan W. Mundell
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Matthew I. Brier
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Everest Orloff
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
| | - Sarah A. Stanley
- Diabetes, Obesity and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Jonathan S. Dordick
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
- Center for Biotechnology and Interdisciplinary Studies, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
- Departments of Biomedical Engineering and Biological Sciences, Rensselaer Polytechnic Institute, Troy, NY 12180, USA
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Sinha S, Elbaz‐Alon Y, Avinoam O. Ca 2+ as a coordinator of skeletal muscle differentiation, fusion and contraction. FEBS J 2022; 289:6531-6542. [PMID: 35689496 PMCID: PMC9795905 DOI: 10.1111/febs.16552] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2022] [Revised: 05/05/2022] [Accepted: 06/09/2022] [Indexed: 12/30/2022]
Abstract
Muscle regeneration is essential for vertebrate muscle homeostasis and recovery after injury. During regeneration, muscle stem cells differentiate into myocytes, which then fuse with pre-existing muscle fibres. Hence, differentiation, fusion and contraction must be tightly regulated during regeneration to avoid the disastrous consequences of premature fusion of myocytes to actively contracting fibres. Cytosolic calcium (Ca2+ ), which is coupled to both induction of myogenic differentiation and contraction, has more recently been implicated in the regulation of myocyte-to-myotube fusion. In this viewpoint, we propose that Ca2+ -mediated coordination of differentiation, fusion and contraction is a feature selected in the amniotes to facilitate muscle regeneration.
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Affiliation(s)
- Sansrity Sinha
- Department of Biomolecular SciencesWeizmann Institute of ScienceRehovotIsrael
| | - Yael Elbaz‐Alon
- Department of Biomolecular SciencesWeizmann Institute of ScienceRehovotIsrael
| | - Ori Avinoam
- Department of Biomolecular SciencesWeizmann Institute of ScienceRehovotIsrael
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Bachmann C, Franchini M, Van den Bersselaar LR, Kruijt N, Voermans NC, Bouman K, Kamsteeg EJ, Knop KC, Ruggiero L, Santoro L, Nevo Y, Wilmshurst J, Vissing J, Sinnreich M, Zorzato D, Muntoni F, Jungbluth H, Zorzato F, Treves S. Targeted transcript analysis in muscles from patients with genetically diverse congenital myopathies. Brain Commun 2022; 4:fcac224. [PMID: 36196089 PMCID: PMC9525005 DOI: 10.1093/braincomms/fcac224] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2022] [Revised: 06/29/2022] [Accepted: 09/01/2022] [Indexed: 11/17/2022] Open
Abstract
Congenital myopathies are a group of early onset muscle diseases of variable severity often with characteristic muscle biopsy findings and involvement of specific muscle types. The clinical diagnosis of patients typically relies on histopathological findings and is confirmed by genetic analysis. The most commonly mutated genes encode proteins involved in skeletal muscle excitation–contraction coupling, calcium regulation, sarcomeric proteins and thin–thick filament interaction. However, mutations in genes encoding proteins involved in other physiological functions (for example mutations in SELENON and MTM1, which encode for ubiquitously expressed proteins of low tissue specificity) have also been identified. This intriguing observation indicates that the presence of a genetic mutation impacts the expression of other genes whose product is important for skeletal muscle function. The aim of the present investigation was to verify if there are common changes in transcript and microRNA expression in muscles from patients with genetically heterogeneous congenital myopathies, focusing on genes encoding proteins involved in excitation–contraction coupling and calcium homeostasis, sarcomeric proteins, transcription factors and epigenetic enzymes. Our results identify RYR1, ATPB2B and miRNA-22 as common transcripts whose expression is decreased in muscles from congenital myopathy patients. The resulting protein deficiency may contribute to the muscle weakness observed in these patients. This study also provides information regarding potential biomarkers for monitoring disease progression and response to pharmacological treatments in patients with congenital myopathies.
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Affiliation(s)
- Christoph Bachmann
- Department of Biomedicine, Basel University Hospital , Hebelstrasse 20, Basel 4031 , Switzerland
- Department of Neurology, Basel University Hospital , Hebelstrasse 20, Basel 4031 , Switzerland
| | - Martina Franchini
- Department of Biomedicine, Basel University Hospital , Hebelstrasse 20, Basel 4031 , Switzerland
- Department of Neurology, Basel University Hospital , Hebelstrasse 20, Basel 4031 , Switzerland
| | - Luuk R Van den Bersselaar
- Department of Anesthesiology, Malignant Hyperthermia Investigation Unit, Canisius Wilhelmina Hospital , Nijmegen , The Netherlands
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center , Nijmegen , The Netherlands
| | - Nick Kruijt
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center , Nijmegen , The Netherlands
| | - Nicol C Voermans
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center , Nijmegen , The Netherlands
| | - Karlijn Bouman
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center , Nijmegen , The Netherlands
- Department of Pediatric Neurology, Donders Institute for Brain, Cognition and Behaviour, Amalia Children’s Hospital, Radboud University Medical Center , Nijmegen , The Netherlands
| | - Erik-Jan Kamsteeg
- Department of Clinical Genetics, Radboud Institute for Molecular Life Sciences, Radboud University, Nijmegen Medical Centre , Nijmegen , The Netherlands
| | - Karl Christian Knop
- Muskelhistologisches Labor, Neurologische Abteilung, Asklepios Klinik St. Georg , Lohmuehlenstraße 5, Hamburg 20099 , Germany
| | - Lucia Ruggiero
- Dipartimento di Neuroscienze, Scienze Riproduttive ed Odontostomatologiche, Università degli Studi di Napoli Federico II , Via Pansini 5, Napoli 80131 , Italy
| | - Lucio Santoro
- Dipartimento di Neuroscienze, Scienze Riproduttive ed Odontostomatologiche, Università degli Studi di Napoli Federico II , Via Pansini 5, Napoli 80131 , Italy
| | - Yoram Nevo
- Institute of Neurology, Schneider Children’s Medical Center of Israel , Petah Tiqva , Israel
| | - Jo Wilmshurst
- Paediatric Neurology, Red Cross War Memorial Children’s Hospital, Neuroscience Institute, University of Cape Town , Cape Town , South Africa
| | - John Vissing
- Department of Neurology, section 8077, Rigshospitalet, University of Copenhagen , Blegdamsvej 9, Copenhagen DK-2100 , Denmark
| | - Michael Sinnreich
- Department of Biomedicine, Basel University Hospital , Hebelstrasse 20, Basel 4031 , Switzerland
- Department of Neurology, Basel University Hospital , Hebelstrasse 20, Basel 4031 , Switzerland
| | - Daniele Zorzato
- GKT School of Medical Education, King’s College London , Hodgkin Building, Newcomen Street, London SE1 1UL , UK
| | - Francesco Muntoni
- Dubowitz Neuromuscular Centre and MRC Centre for Neuromuscular Diseases, UCL, Institute of Child Health , London , UK
- NIHR Great Ormond Street Hospital Biomedical Research Centre , London , UK
| | - Heinz Jungbluth
- Department of Paediatric Neurology, Neuromuscular Service, Evelina Children’s Hospital, St. Thomas’ Hospital , London , UK
- Department of Basic and Clinical Neuroscience, Institute of Psychiatry, Psychology and Neuroscience (IoPPN), King’s College London , London , UK
- Randall Center for Cell and Molecular Biophysics, Muscle Signalling Section, Faculty of Life Sciences and Medicine, King’s College , London , UK
| | - Francesco Zorzato
- Department of Biomedicine, Basel University Hospital , Hebelstrasse 20, Basel 4031 , Switzerland
- Department of Neurology, Basel University Hospital , Hebelstrasse 20, Basel 4031 , Switzerland
- Department of Life Science and Biotechnology, University of Ferrara , Via Borsari 46, Ferrara 44100 , Italy
| | - Susan Treves
- Department of Biomedicine, Basel University Hospital , Hebelstrasse 20, Basel 4031 , Switzerland
- Department of Neurology, Basel University Hospital , Hebelstrasse 20, Basel 4031 , Switzerland
- Department of Life Science and Biotechnology, University of Ferrara , Via Borsari 46, Ferrara 44100 , Italy
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5
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Wang L, Chen Z, Feng Y, Wang R, Bai X, Liu W, Wang D. RNA-seq transcriptomic analysis of 4-octyl itaconate repressing myogenic differentiation. Arch Biochem Biophys 2022; 731:109420. [DOI: 10.1016/j.abb.2022.109420] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2022] [Revised: 09/23/2022] [Accepted: 09/26/2022] [Indexed: 11/16/2022]
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Qiu K, Wang Y, Xu D, He L, Zhang X, Yan E, Wang L, Yin J. Ryanodine receptor RyR1-mediated elevation of Ca 2+ concentration is required for the late stage of myogenic differentiation and fusion. J Anim Sci Biotechnol 2022; 13:9. [PMID: 35144690 PMCID: PMC8832842 DOI: 10.1186/s40104-021-00668-x] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Accepted: 12/09/2021] [Indexed: 12/13/2022] Open
Abstract
Background Cytosolic Ca2+ plays vital roles in myogenesis and muscle development. As a major Ca2+ release channel of endoplasmic reticulum (ER), ryanodine receptor 1 (RyR1) key mutations are main causes of severe congenital myopathies. The role of RyR1 in myogenic differentiation has attracted intense research interest but remains unclear. Results In the present study, both RyR1-knockdown myoblasts and CRISPR/Cas9-based RyR1-knockout myoblasts were employed to explore the role of RyR1 in myogenic differentiation, myotube formation as well as the potential mechanism of RyR1-related myopathies. We observed that RyR1 expression was dramatically increased during the late stage of myogenic differentiation, accompanied by significantly elevated cytoplasmic Ca2+ concentration. Inhibition of RyR1 by siRNA-mediated knockdown or chemical inhibitor, dantrolene, significantly reduced cytosolic Ca2+ and blocked multinucleated myotube formation. The elevation of cytoplasmic Ca2+ concentration can effectively relieve myogenic differentiation stagnation by RyR1 inhibition, demonstrating that RyR1 modulates myogenic differentiation via regulation of Ca2+ release channel. However, RyR1-knockout-induced Ca2+ leakage led to the severe ER stress and excessive unfolded protein response, and drove myoblasts into apoptosis. Conclusions Therefore, we concluded that Ca2+ release mediated by dramatic increase in RyR1 expression is required for the late stage of myogenic differentiation and fusion. This study contributes to a novel understanding of the role of RyR1 in myogenic differentiation and related congenital myopathies, and provides a potential target for regulation of muscle characteristics and meat quality. Supplementary Information The online version contains supplementary material available at 10.1186/s40104-021-00668-x.
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Affiliation(s)
- Kai Qiu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China.,Risk Assessment Laboratory of Feed Derived Factors to Animal Product Quality Safety of Ministry of Agriculture & Rural Affairs & National Engineering Research Center of Biological Feed, Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing, 100081, China
| | - Yubo Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
| | - Doudou Xu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
| | - Linjuan He
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
| | - Xin Zhang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
| | - Enfa Yan
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
| | - Lu Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
| | - Jingdong Yin
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China.
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7
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Eigler T, Zarfati G, Amzallag E, Sinha S, Segev N, Zabary Y, Zaritsky A, Shakked A, Umansky KB, Schejter ED, Millay DP, Tzahor E, Avinoam O. ERK1/2 inhibition promotes robust myotube growth via CaMKII activation resulting in myoblast-to-myotube fusion. Dev Cell 2021; 56:3349-3363.e6. [PMID: 34932950 PMCID: PMC8693863 DOI: 10.1016/j.devcel.2021.11.022] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2020] [Revised: 07/28/2021] [Accepted: 11/21/2021] [Indexed: 11/19/2022]
Abstract
Myoblast fusion is essential for muscle development and regeneration. Yet, it remains poorly understood how mononucleated myoblasts fuse with preexisting fibers. We demonstrate that ERK1/2 inhibition (ERKi) induces robust differentiation and fusion of primary mouse myoblasts through a linear pathway involving RXR, ryanodine receptors, and calcium-dependent activation of CaMKII in nascent myotubes. CaMKII activation results in myotube growth via fusion with mononucleated myoblasts at a fusogenic synapse. Mechanistically, CaMKII interacts with and regulates MYMK and Rac1, and CaMKIIδ/γ knockout mice exhibit smaller regenerated myofibers following injury. In addition, the expression of a dominant negative CaMKII inhibits the formation of large multinucleated myotubes. Finally, we demonstrate the evolutionary conservation of the pathway in chicken myoblasts. We conclude that ERK1/2 represses a signaling cascade leading to CaMKII-mediated fusion of myoblasts to myotubes, providing an attractive target for the cultivated meat industry and regenerative medicine.
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Affiliation(s)
- Tamar Eigler
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Giulia Zarfati
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Emmanuel Amzallag
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Sansrity Sinha
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Nadav Segev
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel
| | - Yishaia Zabary
- Department of Software & Information Systems Engineering, Ben Gurion University, Be'er Sheva, Israel
| | - Assaf Zaritsky
- Department of Software & Information Systems Engineering, Ben Gurion University, Be'er Sheva, Israel
| | - Avraham Shakked
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Kfir-Baruch Umansky
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel
| | - Eyal D Schejter
- Department of Molecular Genetics, Weizmann Institute of Science, Rehovot, Israel
| | - Douglas P Millay
- Division of Molecular Cardiovascular Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA; Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Eldad Tzahor
- Department of Molecular Cell Biology, Weizmann Institute of Science, Rehovot, Israel.
| | - Ori Avinoam
- Department of Biomolecular Sciences, Weizmann Institute of Science, Rehovot, Israel.
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8
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Meyer P, Notarnicola C, Meli AC, Matecki S, Hugon G, Salvador J, Khalil M, Féasson L, Cances C, Cottalorda J, Desguerre I, Cuisset JM, Sabouraud P, Lacampagne A, Chevassus H, Rivier F, Carnac G. Skeletal Ryanodine Receptors Are Involved in Impaired Myogenic Differentiation in Duchenne Muscular Dystrophy Patients. Int J Mol Sci 2021; 22:12985. [PMID: 34884796 PMCID: PMC8657486 DOI: 10.3390/ijms222312985] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 11/24/2021] [Accepted: 11/29/2021] [Indexed: 11/17/2022] Open
Abstract
Duchenne muscular dystrophy (DMD) is characterized by progressive muscle wasting following repeated muscle damage and inadequate regeneration. Impaired myogenesis and differentiation play a major role in DMD as well as intracellular calcium (Ca2+) mishandling. Ca2+ release from the sarcoplasmic reticulum is mostly mediated by the type 1 ryanodine receptor (RYR1) that is required for skeletal muscle differentiation in animals. The study objective was to determine whether altered RYR1-mediated Ca2+ release contributes to myogenic differentiation impairment in DMD patients. The comparison of primary cultured myoblasts from six boys with DMD and five healthy controls highlighted delayed myoblast differentiation in DMD. Silencing RYR1 expression using specific si-RNA in a healthy control induced a similar delayed differentiation. In DMD myotubes, resting intracellular Ca2+ concentration was increased, but RYR1-mediated Ca2+ release was not changed compared with control myotubes. Incubation with the RYR-calstabin interaction stabilizer S107 decreased resting Ca2+ concentration in DMD myotubes to control values and improved calstabin1 binding to the RYR1 complex. S107 also improved myogenic differentiation in DMD. Furthermore, intracellular Ca2+ concentration was correlated with endomysial fibrosis, which is the only myopathologic parameter associated with poor motor outcome in patients with DMD. This suggested a potential relationship between RYR1 dysfunction and motor impairment. Our study highlights RYR1-mediated Ca2+ leakage in human DMD myotubes and its key role in myogenic differentiation impairment. RYR1 stabilization may be an interesting adjunctive therapeutic strategy in DMD.
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Affiliation(s)
- Pierre Meyer
- PhyMedExp, University of Montpellier, Inserm, CNRS, 34295 Montpellier, France; (C.N.); (A.C.M.); (S.M.); (G.H.); (J.S.); (A.L.); (F.R.); (G.C.)
- Reference Centre for Neuromuscular Diseases AOC, Clinical Investigation Centre, Pediatric Neurology Department, Montpellier University Hospital, 34000 Montpellier, France
| | - Cécile Notarnicola
- PhyMedExp, University of Montpellier, Inserm, CNRS, 34295 Montpellier, France; (C.N.); (A.C.M.); (S.M.); (G.H.); (J.S.); (A.L.); (F.R.); (G.C.)
| | - Albano C. Meli
- PhyMedExp, University of Montpellier, Inserm, CNRS, 34295 Montpellier, France; (C.N.); (A.C.M.); (S.M.); (G.H.); (J.S.); (A.L.); (F.R.); (G.C.)
| | - Stefan Matecki
- PhyMedExp, University of Montpellier, Inserm, CNRS, 34295 Montpellier, France; (C.N.); (A.C.M.); (S.M.); (G.H.); (J.S.); (A.L.); (F.R.); (G.C.)
| | - Gérald Hugon
- PhyMedExp, University of Montpellier, Inserm, CNRS, 34295 Montpellier, France; (C.N.); (A.C.M.); (S.M.); (G.H.); (J.S.); (A.L.); (F.R.); (G.C.)
| | - Jérémy Salvador
- PhyMedExp, University of Montpellier, Inserm, CNRS, 34295 Montpellier, France; (C.N.); (A.C.M.); (S.M.); (G.H.); (J.S.); (A.L.); (F.R.); (G.C.)
| | - Mirna Khalil
- Clinical Investigation Center, Montpellier University Hospital, 34000 Montpellier, France; (M.K.); (H.C.)
| | - Léonard Féasson
- Myology Unit, Reference Center for Neuromuscular Diseases Euro-NmD, Inter-University Laboratory of Human Movement Sciences—EA7424, University Hospital of Saint-Etienne, 42055 Saint-Etienne, France;
| | - Claude Cances
- Reference Center for Neuromuscular Diseases AOC, Pediatric Neurology Department, Toulouse University Hospital, 3100 Toulouse, France;
- Pediatric Clinical Research Unit, Pediatric Multi-thematic Module CIC 1436, Toulouse Children’s Hospital, 31300 Toulouse, France
| | - Jérôme Cottalorda
- Pediatric Orthopedic and Plastic Surgery Department, Montpellier University Hospital, 34295 Montpellier, France;
| | - Isabelle Desguerre
- Reference Center for Neuromuscular Diseases Paris Nord-Ile-de-France-Est, Pediatric Neurology Department, Necker Enfant Malades University Hospital, Assistance Publique des Hôpitaux de Paris Centre, Paris University, 75019 Paris, France;
| | - Jean-Marie Cuisset
- Reference Center for Neuromuscular Diseases Nord-Ile-de-France-Est, Pediatric Neurology Department, Lille University Hospital, 59000 Lille, France;
| | - Pascal Sabouraud
- Reference Center for Neuromuscular Diseases Nord-Ile-de-France-Est, Pediatric Neurology Department, Reims University Hospital, 51100 Reims, France;
| | - Alain Lacampagne
- PhyMedExp, University of Montpellier, Inserm, CNRS, 34295 Montpellier, France; (C.N.); (A.C.M.); (S.M.); (G.H.); (J.S.); (A.L.); (F.R.); (G.C.)
| | - Hugues Chevassus
- Clinical Investigation Center, Montpellier University Hospital, 34000 Montpellier, France; (M.K.); (H.C.)
| | - François Rivier
- PhyMedExp, University of Montpellier, Inserm, CNRS, 34295 Montpellier, France; (C.N.); (A.C.M.); (S.M.); (G.H.); (J.S.); (A.L.); (F.R.); (G.C.)
- Reference Centre for Neuromuscular Diseases AOC, Clinical Investigation Centre, Pediatric Neurology Department, Montpellier University Hospital, 34000 Montpellier, France
| | - Gilles Carnac
- PhyMedExp, University of Montpellier, Inserm, CNRS, 34295 Montpellier, France; (C.N.); (A.C.M.); (S.M.); (G.H.); (J.S.); (A.L.); (F.R.); (G.C.)
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9
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Gong L, Zhang X, Qiu K, He L, Wang Y, Yin J. Arginine promotes myogenic differentiation and myotube formation through the elevation of cytoplasmic calcium concentration. ACTA ACUST UNITED AC 2021; 7:1115-1123. [PMID: 34738042 PMCID: PMC8543491 DOI: 10.1016/j.aninu.2021.05.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2020] [Revised: 05/12/2021] [Accepted: 05/18/2021] [Indexed: 12/14/2022]
Abstract
This study aimed to explore the mechanism underlying arginine-promoted myogenesis of myoblasts. C2C12 cells were cultured with a medium containing 0.1, 0.4, 0.8, or 1.2 mmol/L arginine, respectively. Cell proliferation, viability, differentiation indexes, cytoplasmic Ca2+ concentration, and relative mRNA expression levels of myogenic regulatory factors (MRF) and key Ca2+ channels were measured in the absence or presence of 2 chemical inhibitors, dantrolene (DAN, 10 μmol/L) and nisoldipine (NIS, 10 μmol/L), respectively. Results demonstrated that arginine promoted myogenic differentiation and myotube formation. Compared with the control (0.4 mmol/L arginine), 1.2 mmol/L arginine upregulated the relative mRNA expression levels of myogenin (MyoG) and Myomaker at d 2 during myogenic induction (P < 0.05). Cytoplasmic Ca2+ concentrations were significantly elevated by arginine supplementation at d 2 and 4 (P < 0.05). Relative mRNA expression levels of Ca2+ channels including the type 1 ryanodine receptor (RyR1) and voltage-gated Ca2+ channel (Cav1.1) were upregulated by 1.2 mmol/L arginine during 2-d myogenic induction (P < 0.01). However, arginine-promoted myogenic potential of myoblasts was remarkably compromised by DAN and NIS, respectively (P < 0.05). These findings evidenced that the supplementation of arginine promoted myogenic differentiation and myotube formation through increasing cytoplasmic Ca2+ concentration from both extracellular and sarcoplasmic reticulum Ca2+.
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Affiliation(s)
- Lu Gong
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
| | - Xin Zhang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
| | - Kai Qiu
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
| | - Linjuan He
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
| | - Yubo Wang
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
| | - Jingdong Yin
- State Key Laboratory of Animal Nutrition, College of Animal Science and Technology, China Agricultural University, Beijing, 100193, China
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10
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Dexamethasone accelerates muscle regeneration by modulating kinesin-1-mediated focal adhesion signals. Cell Death Discov 2021; 7:35. [PMID: 33597503 PMCID: PMC7889929 DOI: 10.1038/s41420-021-00412-4] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 10/27/2020] [Accepted: 10/30/2020] [Indexed: 01/11/2023] Open
Abstract
During differentiation, skeletal muscle develops mature multinucleated muscle fibers, which could contract to exert force on a substrate. Muscle dysfunction occurs progressively in patients with muscular dystrophy, leading to a loss of the ability to walk and eventually to death. The synthetic glucocorticoid dexamethasone (Dex) has been used therapeutically to treat muscular dystrophy by an inhibition of inflammation, followed by slowing muscle degeneration and stabilizing muscle strength. Here, in mice with muscle injury, we found that Dex significantly promotes muscle regeneration via promoting kinesin-1 motor activity. Nevertheless, how Dex promotes myogenesis through kinesin-1 motors remains unclear. We found that Dex directly increases kinesin-1 motor activity, which is required for the expression of a myogenic marker (muscle myosin heavy chain 1/2), and also for the process of myoblast fusion and the formation of polarized myotubes. Upon differentiation, kinesin-1 mediates the recruitment of integrin β1 onto microtubules allowing delivery of the protein into focal adhesions. Integrin β1-mediated focal adhesion signaling then guides myoblast fusion towards a polarized morphology. By imposing geometric constrains via micropatterns, we have proved that cell adhesion is able to rescue the defects caused by kinesin-1 inhibition during the process of myogenesis. These discoveries reveal a mechanism by which Dex is able to promote myogenesis, and lead us towards approaches that are more efficient in improving skeletal muscle regeneration.
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11
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Wang J, Fan Y, Dube S, Agassy NW, Dube DK, Sanger JM, Sanger JW. Myofibril assembly and the roles of the ubiquitin proteasome system. Cytoskeleton (Hoboken) 2020; 77:456-479. [PMID: 33124174 DOI: 10.1002/cm.21641] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Revised: 10/07/2020] [Accepted: 10/19/2020] [Indexed: 12/12/2022]
Abstract
De novo assembly of myofibrils in vertebrate cross-striated muscles progresses in three distinct steps, first from a minisarcomeric alignment of several nonmuscle and muscle proteins in premyofibrils, followed by insertions of additional proteins and increased organization in nascent myofibrils, ending with mature contractile myofibrils. In a search for controls of the process of myofibril assembly, we discovered that the transition from nascent to mature myofibrils could be halted by inhibitors of three distinct functions of the ubiquitin proteasome system (UPS). First, inhibition of pathway to E3 Cullin ligases that ubiquitinate proteins led to an arrest of myofibrillogenesis at the nascent myofibril stage. Second, inhibition of p97 protein extractions of ubiquitinated proteins led to a similar arrest of myofibrillogenesis at the nascent myofibril stage. Third, inhibitors of proteolytic action by proteasomes also blocked nascent myofibrils from transitioning to mature myofibrils. In contrast, inhibitors of autophagy or lysosomes did not affect myofibrillogenesis. To probe for differences in the effects of UPS inhibitors during myofibrillogenesis, we analyzed by fluorescence recovery after photobleaching the exchange rates of two selected sarcomeric proteins (muscle myosin II heavy chains and light chains). In the presence of p97 and proteasomal inhibitors, the dynamics of each of these two myosin proteins decreased in the nascent myofibril stage, but were unaffected in the mature myofibril stage. The increased stability of myofibrils occurring in the transition from nascent to mature myofibril assembly indicates the importance of dynamics and selective destruction in the muscle myosin II proteins for the remodeling of nascent to mature myofibrils.
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Affiliation(s)
- Jushuo Wang
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, Syracuse, New York, USA
| | - Yingli Fan
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, Syracuse, New York, USA
| | - Syamalima Dube
- Department of Medicine, SUNY Upstate Medical University, Syracuse, New York, USA
| | - Nicodeme Wanko Agassy
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, Syracuse, New York, USA
| | - Dipak K Dube
- Department of Medicine, SUNY Upstate Medical University, Syracuse, New York, USA
| | - Jean M Sanger
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, Syracuse, New York, USA
| | - Joseph W Sanger
- Department of Cell and Developmental Biology, SUNY Upstate Medical University, Syracuse, New York, USA
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12
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Paudel S, Sindelar R, Saha M. Calcium Signaling in Vertebrate Development and Its Role in Disease. Int J Mol Sci 2018; 19:E3390. [PMID: 30380695 PMCID: PMC6274931 DOI: 10.3390/ijms19113390] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 10/18/2018] [Accepted: 10/22/2018] [Indexed: 12/11/2022] Open
Abstract
Accumulating evidence over the past three decades suggests that altered calcium signaling during development may be a major driving force for adult pathophysiological events. Well over a hundred human genes encode proteins that are specifically dedicated to calcium homeostasis and calcium signaling, and the majority of these are expressed during embryonic development. Recent advances in molecular techniques have identified impaired calcium signaling during development due to either mutations or dysregulation of these proteins. This impaired signaling has been implicated in various human diseases ranging from cardiac malformations to epilepsy. Although the molecular basis of these and other diseases have been well studied in adult systems, the potential developmental origins of such diseases are less well characterized. In this review, we will discuss the recent evidence that examines different patterns of calcium activity during early development, as well as potential medical conditions associated with its dysregulation. Studies performed using various model organisms, including zebrafish, Xenopus, and mouse, have underscored the critical role of calcium activity in infertility, abortive pregnancy, developmental defects, and a range of diseases which manifest later in life. Understanding the underlying mechanisms by which calcium regulates these diverse developmental processes remains a challenge; however, this knowledge will potentially enable calcium signaling to be used as a therapeutic target in regenerative and personalized medicine.
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Affiliation(s)
- Sudip Paudel
- College of William and Mary, Williamsburg, VA 23187, USA.
| | - Regan Sindelar
- College of William and Mary, Williamsburg, VA 23187, USA.
| | - Margaret Saha
- College of William and Mary, Williamsburg, VA 23187, USA.
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13
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Intracellular Calcium Mobilization Is Required for Sonic Hedgehog Signaling. Dev Cell 2018; 45:512-525.e5. [PMID: 29754802 DOI: 10.1016/j.devcel.2018.04.013] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2017] [Revised: 02/28/2018] [Accepted: 04/11/2018] [Indexed: 01/09/2023]
Abstract
Graded Shh signaling across fields of precursor cells coordinates patterns of gene expression, differentiation, and morphogenetic behavior as precursors form complex structures, such as the nervous system, the limbs, and craniofacial skeleton. Here we discover that intracellular calcium mobilization, a process tightly controlled and readily modulated, regulates the level of Shh-dependent gene expression in responding cells and affects the development of all Shh-dependent cell types in the zebrafish embryo. Reduced expression or modified activity of ryanodine receptor (RyR) intracellular calcium release channels shifted the allocation of Shh-dependent cell fates in the somitic muscle and neural tube. Mosaic analysis revealed that RyR-mediated calcium mobilization is required specifically in Shh ligand-receiving cells. This work reveals that RyR channels participate in intercellular signal transduction events. As modulation of RyR activity modifies tissue patterning, we hypothesize that alterations in intracellular calcium mobilization contribute to both birth defects and evolutionary modifications of morphology.
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Kelu JJ, Webb SE, Parrington J, Galione A, Miller AL. Ca 2+ release via two-pore channel type 2 (TPC2) is required for slow muscle cell myofibrillogenesis and myotomal patterning in intact zebrafish embryos. Dev Biol 2017; 425:109-129. [PMID: 28390800 DOI: 10.1016/j.ydbio.2017.03.031] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 03/30/2017] [Accepted: 03/31/2017] [Indexed: 01/14/2023]
Abstract
We recently demonstrated a critical role for two-pore channel type 2 (TPC2)-mediated Ca2+ release during the differentiation of slow (skeletal) muscle cells (SMC) in intact zebrafish embryos, via the introduction of a translational-blocking morpholino antisense oligonucleotide (MO). Here, we extend our study and demonstrate that knockdown of TPC2 with a non-overlapping splice-blocking MO, knockout of TPC2 (via the generation of a tpcn2dhkz1a mutant line of zebrafish using CRISPR/Cas9 gene-editing), or the pharmacological inhibition of TPC2 action with bafilomycin A1 or trans-ned-19, also lead to a significant attenuation of SMC differentiation, characterized by a disruption of SMC myofibrillogenesis and gross morphological changes in the trunk musculature. When the morphants were injected with tpcn2-mRNA or were treated with IP3/BM or caffeine (agonists of the inositol 1,4,5-trisphosphate receptor (IP3R) and ryanodine receptor (RyR), respectively), many aspects of myofibrillogenesis and myotomal patterning (and in the case of the pharmacological treatments, the Ca2+ signals generated in the SMCs), were rescued. STED super-resolution microscopy revealed a close physical relationship between clusters of RyR in the terminal cisternae of the sarcoplasmic reticulum (SR), and TPC2 in lysosomes, with a mean estimated separation of ~52-87nm. Our data therefore add to the increasing body of evidence, which indicate that localized Ca2+ release via TPC2 might trigger the generation of more global Ca2+ release from the SR via Ca2+-induced Ca2+ release.
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MESH Headings
- Animals
- Base Sequence
- Behavior, Animal/drug effects
- Body Patterning/drug effects
- CRISPR-Cas Systems/genetics
- Caffeine/pharmacology
- Calcium/metabolism
- Calcium Channels/metabolism
- Calcium Signaling/drug effects
- Cell Death/drug effects
- Cells, Cultured
- Embryo, Nonmammalian/drug effects
- Embryo, Nonmammalian/metabolism
- Gene Knockdown Techniques
- Gene Knockout Techniques
- Inositol 1,4,5-Trisphosphate Receptors/metabolism
- Kinesins/metabolism
- Macrolides/pharmacology
- Models, Biological
- Morpholinos/pharmacology
- Motor Activity/drug effects
- Muscle Cells/cytology
- Muscle Cells/drug effects
- Muscle Cells/metabolism
- Muscle Development/drug effects
- Muscle Fibers, Slow-Twitch/cytology
- Muscle Fibers, Slow-Twitch/drug effects
- Muscle Fibers, Slow-Twitch/metabolism
- Phenotype
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- Ryanodine Receptor Calcium Release Channel/metabolism
- Sarcomeres/drug effects
- Sarcomeres/metabolism
- Zebrafish/embryology
- Zebrafish/metabolism
- Zebrafish Proteins/metabolism
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Affiliation(s)
- Jeffrey J Kelu
- Division of Life Science & State Key Laboratory of Molecular Neuroscience, HKUST, Clear Water Bay, Hong Kong, PR China
| | - Sarah E Webb
- Division of Life Science & State Key Laboratory of Molecular Neuroscience, HKUST, Clear Water Bay, Hong Kong, PR China
| | - John Parrington
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, UK
| | - Antony Galione
- Department of Pharmacology, University of Oxford, Mansfield Road, Oxford, UK
| | - Andrew L Miller
- Division of Life Science & State Key Laboratory of Molecular Neuroscience, HKUST, Clear Water Bay, Hong Kong, PR China; Marine Biological Laboratory, Woods Hole, MA, USA.
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15
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Cong X, Doering J, Grange RW, Jiang H. Defective excitation-contraction coupling is partially responsible for impaired contractility in hindlimb muscles of Stac3 knockout mice. Sci Rep 2016; 6:26194. [PMID: 27184118 PMCID: PMC4868984 DOI: 10.1038/srep26194] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2016] [Accepted: 04/28/2016] [Indexed: 01/13/2023] Open
Abstract
The Stac3 gene is exclusively expressed in skeletal muscle, and Stac3 knockout is perinatal lethal in mice. Previous data from Stac3-deleted diaphragms indicated that Stac3-deleted skeletal muscle could not contract because of defective excitation-contraction (EC) coupling. In this study, we determined the contractility of Stac3-deleted hindlimb muscle. In response to frequent electrostimulation, Stac3-deleted hindlimb muscle contracted but the maximal tension generated was only 20% of that in control (wild type or heterozygous) muscle (P < 0.05). In response to high [K(+)], caffeine, and 4-chloro-m-cresol (4-CMC), the maximal tensions generated in Stac3-deleted muscle were 29% (P < 0.05), 58% (P = 0.08), and 55% (P < 0.05) of those in control muscle, respectively. In response to 4-CMC or caffeine, over 90% of myotubes formed from control myoblasts contracted, but only 60% of myotubes formed from Stac3-deleted myoblasts contracted (P = 0.05). However, in response to 4-CMC or caffeine, similar increases in intracellular calcium concentration were observed in Stac3-deleted and control myotubes. Gene expression and histological analyses revealed that Stac3-deleted hindlimb muscle contained more slow type-like fibers than control muscle. These data together confirm a critical role of STAC3 in EC coupling but also suggest that STAC3 may have additional functions in skeletal muscle, at least in the hindlimb muscle.
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Affiliation(s)
- Xiaofei Cong
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Jonathan Doering
- Department of Human Nutrition, Foods, and Exercise, Virginia Tech, Blacksburg, VA, USA
| | - Robert W Grange
- Department of Human Nutrition, Foods, and Exercise, Virginia Tech, Blacksburg, VA, USA
| | - Honglin Jiang
- Department of Animal and Poultry Sciences, Virginia Tech, Blacksburg, VA, USA
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16
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Meyer SU, Krebs S, Thirion C, Blum H, Krause S, Pfaffl MW. Tumor Necrosis Factor Alpha and Insulin-Like Growth Factor 1 Induced Modifications of the Gene Expression Kinetics of Differentiating Skeletal Muscle Cells. PLoS One 2015; 10:e0139520. [PMID: 26447881 PMCID: PMC4598026 DOI: 10.1371/journal.pone.0139520] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Accepted: 09/13/2015] [Indexed: 12/19/2022] Open
Abstract
Introduction TNF-α levels are increased during muscle wasting and chronic muscle degeneration and regeneration processes, which are characteristic for primary muscle disorders. Pathologically increased TNF-α levels have a negative effect on muscle cell differentiation efficiency, while IGF1 can have a positive effect; therefore, we intended to elucidate the impact of TNF-α and IGF1 on gene expression during the early stages of skeletal muscle cell differentiation. Methodology/Principal Findings This study presents gene expression data of the murine skeletal muscle cells PMI28 during myogenic differentiation or differentiation with TNF-α or IGF1 exposure at 0 h, 4 h, 12 h, 24 h, and 72 h after induction. Our study detected significant coregulation of gene sets involved in myoblast differentiation or in the response to TNF-α. Gene expression data revealed a time- and treatment-dependent regulation of signaling pathways, which are prominent in myogenic differentiation. We identified enrichment of pathways, which have not been specifically linked to myoblast differentiation such as doublecortin-like kinase pathway associations as well as enrichment of specific semaphorin isoforms. Moreover to the best of our knowledge, this is the first description of a specific inverse regulation of the following genes in myoblast differentiation and response to TNF-α: Aknad1, Cmbl, Sepp1, Ndst4, Tecrl, Unc13c, Spats2l, Lix1, Csdc2, Cpa1, Parm1, Serpinb2, Aspn, Fibin, Slc40a1, Nrk, and Mybpc1. We identified a gene subset (Nfkbia, Nfkb2, Mmp9, Mef2c, Gpx, and Pgam2), which is robustly regulated by TNF-α across independent myogenic differentiation studies. Conclusions This is the largest dataset revealing the impact of TNF-α or IGF1 treatment on gene expression kinetics of early in vitro skeletal myoblast differentiation. We identified novel mRNAs, which have not yet been associated with skeletal muscle differentiation or response to TNF-α. Results of this study may facilitate the understanding of transcriptomic networks underlying inhibited muscle differentiation in inflammatory diseases.
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Affiliation(s)
- Swanhild U Meyer
- Physiology Weihenstephan, ZIEL Research Center for Nutrition and Food Sciences, Technische Universität München, Freising, Germany
| | - Stefan Krebs
- Laboratory for Functional Genome Analysis (LAFUGA), Gene Center, University of Munich, Ludwig-Maximilians-Universität München, München, Germany
| | | | - Helmut Blum
- Laboratory for Functional Genome Analysis (LAFUGA), Gene Center, University of Munich, Ludwig-Maximilians-Universität München, München, Germany
| | - Sabine Krause
- Friedrich-Baur-Institute, Department of Neurology, Ludwig-Maximilians-Universität München, München, Germany
| | - Michael W Pfaffl
- Physiology Weihenstephan, ZIEL Research Center for Nutrition and Food Sciences, Technische Universität München, Freising, Germany
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17
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Wu HJ, Fong TH, Chen SL, Wei JC, Wang IJ, Wen CC, Chang CY, Chen XG, Chen WY, Chen HM, Horng JL, Wang YH, Chen YH. Perturbation of cytosolic calcium by 2-aminoethoxydiphenyl borate and caffeine affects zebrafish myofibril alignment. J Appl Toxicol 2014; 35:287-94. [PMID: 25186829 DOI: 10.1002/jat.3057] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2013] [Revised: 07/07/2014] [Accepted: 07/07/2014] [Indexed: 02/01/2023]
Abstract
The objective of the current study was to investigate the effects of Ca(2+) levels on myofibril alignment during zebrafish embryogenesis. To investigate how altered cytoplasmic Ca(2+) levels affect myofibril alignment, we exposed zebrafish embryos to 2-aminothoxyldiphenyl borate (2-APB; an inositol 1,4,5-trisphosphate receptor inhibitor that reduces cytosolic Ca(2+) levels) and caffeine (a ryanodine receptor activator that enhances cytosolic Ca(2+) levels). The results demonstrated that the most evident changes in zebrafish embryos treated with 2-APB were shorter body length, curved trunk and malformed somite boundary. In contrast, such malformed phenotypes were evident neither in untreated controls nor in caffeine-treated embryos. Subtle morphological changes, including changes in muscle fibers, F-actin and ultrastructures were easily observed by staining with specific monoclonal antibodies (F59 and α-laminin), fluorescent probes (phalloidin) and by transmission electron microscopy. Our data suggested that: (1) the exposure to 2-APB and/or caffeine led to myofibril misalignment; (2) 2-APB-treated embryos displayed split and short myofibril phenotypes, whereas muscle fibers from caffeine-treated embryos were twisted and wavy; and (3) zebrafish embryos co-exposed to 2-APB and caffeine resulted in normal myofibril alignment. In conclusion, we proposed that cytosolic Ca(2+) is important for myogenesis, particularly for myofibril alignment.
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Affiliation(s)
- Hsin-Ju Wu
- Department of Chemistry, Tamkang University, No. 151, Ying-chuan Road, Tamsui, New Taipei City, Taiwan
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18
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Abstract
The function of muscle is to contract, which means to exert force on a substrate. The adaptations required for skeletal muscle differentiation, from a prototypic cell, involve specialization of housekeeping cytoskeletal contracting and supporting systems into crystalline arrays of proteins. Here I discuss the changes that all three cytoskeletal systems (microfilaments, intermediate filaments, and microtubules) undergo through myogenesis. I also discuss their interaction, through the membrane, to extracellular matrix and to other cells, where force will be exerted during contraction. The three cytoskeletal systems are necessary for the muscle cell and must exert complementary roles in the cell. Muscle is a responsive system, where structure and function are integrated: the structural adaptations it undergoes depend on force production. In this way, the muscle cytoskeleton is a portrait of its physiology. I review the cytoskeletal proteins and structures involved in muscle function and focus particularly on their role in myogenesis, the process by which this incredible muscle machine is made. Although the focus is on skeletal muscle, some of the discussion is applicable to cardiac and smooth muscle.
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19
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Abstract
The stromal interaction molecules STIM1 and STIM2 are Ca2+ sensors, mostly located in the endoplasmic reticulum, that detect changes in the intraluminal Ca2+ concentration and communicate this information to plasma membrane store-operated channels, including members of the Orai family, thus mediating store-operated Ca2+ entry (SOCE). Orai and STIM proteins are almost ubiquitously expressed in human cells, where SOCE has been reported to play a relevant functional role. The phenotype of patients bearing mutations in STIM and Orai proteins, together with models of STIM or Orai deficiency in mice, as well as other organisms such as Drosophila melanogaster, have provided compelling evidence on the relevant role of these proteins in cellular physiology and pathology. Orai1-deficient patients suffer from severe immunodeficiency, congenital myopathy, chronic pulmonary disease, anhydrotic ectodermal dysplasia and defective dental enamel calcification. STIM1-deficient patients showed similar abnormalities, as well as autoimmune disorders. This review summarizes the current evidence that identifies and explains diseases induced by disturbances in SOCE due to deficiencies or mutations in Orai and STIM proteins.
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Affiliation(s)
- A Berna-Erro
- Department of Physiology, University of Extremadura, Cáceres, Spain
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20
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Selenoprotein N in skeletal muscle: from diseases to function. J Mol Med (Berl) 2012; 90:1095-107. [PMID: 22527882 DOI: 10.1007/s00109-012-0896-x] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Revised: 03/22/2012] [Accepted: 03/26/2012] [Indexed: 12/25/2022]
Abstract
Selenoprotein N (SelN) deficiency causes several inherited neuromuscular disorders collectively termed SEPN1-related myopathies, characterized by early onset, generalized muscle atrophy, and muscle weakness affecting especially axial muscles and leading to spine rigidity, severe scoliosis, and respiratory insufficiency. SelN is ubiquitously expressed and is located in the membrane of the endoplasmic reticulum; however, its function remains elusive. The predominant expression of SelN in human fetal tissues and the embryonic muscle phenotype reported in mutant zebrafish suggest that it is involved in myogenesis. In mice, SelN is also mostly expressed during embryogenesis and especially in the myotome, but no defect was detected in muscle development and growth in the Sepn1 knock-out mouse model. By contrast, we recently demonstrated that SelN is essential for muscle regeneration and satellite cell maintenance in mice and humans, hence opening new avenues regarding the pathomechanism(s) leading to SEPN1-related myopathies. At the cellular level, recent data suggested that SelN participates in oxidative and calcium homeostasis, with a potential role in the regulation of the ryanodine receptor activity. Despite the recent and exciting progress regarding the physiological function(s) of SelN in muscle tissue, the pathogenesis leading to SEPN1-related myopathies remains largely unknown, with several unsolved questions, and no treatment available. In this review, we introduce SelN, its properties and expression pattern in zebrafish, mice, and humans, and we discuss its potential roles in muscle tissue and the ensuing clues for the development of therapeutic options.
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21
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Thomas NL, Williams AJ. Pharmacology of ryanodine receptors and Ca2+-induced Ca2+ release. ACTA ACUST UNITED AC 2012. [DOI: 10.1002/wmts.34] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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22
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Vega AV, Ramos-Mondragón R, Calderón-Rivera A, Zarain-Herzberg A, Avila G. Calcitonin gene-related peptide restores disrupted excitation-contraction coupling in myotubes expressing central core disease mutations in RyR1. J Physiol 2011; 589:4649-69. [PMID: 21825032 DOI: 10.1113/jphysiol.2011.210765] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Central core disease (CCD) is a congenital human myopathy associated with mutations in the gene encoding the skeletal muscle ryanodine receptor (RyR1), resulting in skeletal muscle weakness and lower limb deformities. The muscle weakness can be at least partially explained by a reduced magnitude of voltage-gated Ca(2+) release (VGCR). To date, only a few studies have focused on identifying potential therapeutic agents for CCD. Therefore, in this work we investigated the potential use of the calcitonin gene related peptide (CGRP) to restore VGCR in myotubes expressing CCD RyR1 mutants. We also examined the influence of CCD mutants on Ca(2+)-dependent processes involved in myogenesis (myoblast fusion and sarcoendoplasmic reticulum Ca(2+)-ATPase isoform 2 (SERCA2) gene expression). C2C12 cells were transfected with cDNAs encoding either wild-type RyR1 or CCD mutants, and then exposed to CGRP (100 nm, 1-4 h). Expression of the I4897T mutant significantly inhibited SERCA2 gene expression and myoblast fusion, whereas the Y523S mutant exerted the opposite effect. Interestingly, both mutants clearly inhibited VGCR (50%), due to a reduction in SR Ca(2+) content. However, no major changes due to CGRP or CCD mutants were observed in I(CaL). Our data suggest that the Y523S mutant results in store depletion via decompensated SR Ca(2+) leak, while the I4897T mutant inhibits SERCA2 gene expression. Remarkably, in both cases CGRP restored VGCR, likely to have been by enhancing phospholamban (PLB) phosphorylation, SERCA activity and SR Ca(2+) content. Taken together, our data show that in the C2C12 model system, changes in excitation-contraction coupling induced by the expression of RyR1 channels bearing CCD mutations Y523S or I4897T can be reversed by CGRP.
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Webb SE, Miller AL. Visualization of Ca²+ signaling during embryonic skeletal muscle formation in vertebrates. Cold Spring Harb Perspect Biol 2011; 3:cshperspect.a004325. [PMID: 21421918 DOI: 10.1101/cshperspect.a004325] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Dynamic changes in cytosolic and nuclear Ca(2+) concentration are reported to play a critical regulatory role in different aspects of skeletal muscle development and differentiation. Here we review our current knowledge of the spatial dynamics of Ca(2+) signals generated during muscle development in mouse, rat, and Xenopus myocytes in culture, in the exposed myotome of dissected Xenopus embryos, and in intact normally developing zebrafish. It is becoming clear that subcellular domains, either membrane-bound or otherwise, may have their own Ca(2+) signaling signatures. Thus, to understand the roles played by myogenic Ca(2+) signaling, we must consider: (1) the triggers and targets within these signaling domains; (2) interdomain signaling, and (3) how these Ca(2+) signals integrate with other signaling networks involved in myogenesis. Imaging techniques that are currently available to provide direct visualization of these Ca(2+) signals are also described.
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Affiliation(s)
- Sarah E Webb
- Section of Biochemistry and Cell Biology, and State Key Laboratory of Molecular Neuroscience, Division of Life Science, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong SAR, PRC
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Castets P, Bertrand AT, Beuvin M, Ferry A, Le Grand F, Castets M, Chazot G, Rederstorff M, Krol A, Lescure A, Romero NB, Guicheney P, Allamand V. Satellite cell loss and impaired muscle regeneration in selenoprotein N deficiency. Hum Mol Genet 2010; 20:694-704. [PMID: 21131290 DOI: 10.1093/hmg/ddq515] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Selenoprotein N (SelN) deficiency causes a group of inherited neuromuscular disorders termed SEPN1-related myopathies (SEPN1-RM). Although the function of SelN remains unknown, recent data demonstrated that it is dispensable for mouse embryogenesis and suggested its involvement in the regulation of ryanodine receptors and/or cellular redox homeostasis. Here, we investigate the role of SelN in satellite cell (SC) function and muscle regeneration, using the Sepn1(-/-) mouse model. Following cardiotoxin-induced injury, SelN expression was strongly up-regulated in wild-type muscles and, for the first time, we detected its endogenous expression in a subset of mononucleated cells by immunohistochemistry. We show that SelN deficiency results in a reduced basal SC pool in adult skeletal muscles and in an imperfect muscle restoration following a single injury. A dramatic depletion of the SC pool was detected after the first round of degeneration and regeneration that totally prevented subsequent regeneration of Sepn1(-/-) muscles. We demonstrate that SelN deficiency affects SC dynamics on isolated single fibres and increases the proliferation of Sepn1(-/-) muscle precursors in vivo and in vitro. Most importantly, exhaustion of the SC population was specifically identified in muscle biopsies from patients with mutations in the SEPN1 gene. In conclusion, we describe for the first time a major physiological function of SelN in skeletal muscles, as a key regulator of SC function, which likely plays a central role in the pathophysiological mechanism leading to SEPN1-RM.
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Wang J, Jiang L, Gao X, Ding H, Wang Q, Cheng J, Gao R, Xiao H. Fenvalerate-induced Ca2+ transients via both intracellular and extracellular way in mouse GC-2spd (ts) cells. Toxicology 2009; 259:122-32. [DOI: 10.1016/j.tox.2009.02.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2008] [Revised: 02/19/2009] [Accepted: 02/19/2009] [Indexed: 11/28/2022]
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26
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Van den Maagdenberg K, Stinckens A, Lefaucheur L, Buys N, De Smet S. The effect of mutations in the insulin-like growth factor-II and ryanodine receptor-1 genes on biochemical and histochemical muscle fibre characteristics in pigs. Meat Sci 2008; 79:757-66. [DOI: 10.1016/j.meatsci.2007.11.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2007] [Revised: 11/15/2007] [Accepted: 11/15/2007] [Indexed: 11/25/2022]
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27
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Chen YH, Huang YH, Wen CC, Wang YH, Chen WL, Chen LC, Tsay HJ. Movement disorder and neuromuscular change in zebrafish embryos after exposure to caffeine. Neurotoxicol Teratol 2008; 30:440-7. [PMID: 18508234 DOI: 10.1016/j.ntt.2008.04.003] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2007] [Revised: 04/15/2008] [Accepted: 04/15/2008] [Indexed: 12/01/2022]
Abstract
Though caffeine is broadly distributed in many plants and foods, little is known about the teratogenic effects of caffeine during early embryonic development. Here, we used zebrafish as a model to test toxicity and teratogenicity since they have transparent eggs, making the organogenesis of zebrafish embryos easier to observe. When the exposure doses of caffeine were less than 150 ppm (17.5, 35, 50, 100 and 150 ppm), the zebrafish embryos exhibited no significant differences in survival rates after comparison with vehicle-control (0 ppm) group. As the exposure dosages increased, the survival rates decreased. No embryos survived after treatment with 300 ppm caffeine or higher dosages. The most evident change in embryos treated with caffeine was a shorter body length (vehicle-control: 3.26+/-0.01 mm, n=49; vs 150 ppm of caffeine: 2.67+/-0.03 mm, n=50). In addition, caffeine-treated embryos exhibited significantly reduced tactile sensitivity frequencies of touch-induced movement (vehicle-control: 9.93+/-0.77 vs 17.5-150 ppm caffeine: 5.37+/-0.52-0.10+/-0.06). Subtle changes are easily observed by staining with specific monoclonal antibodies F59, Znp1 and Zn5 to detect morphological changes in muscle fibers, primary motor axons and secondary motor axon projections, respectively. Our data show that the treatment of caffeine leads to misalignment of muscle fibers and motor neuron defects, especially secondary motor neuron axonal growth defects.
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Affiliation(s)
- Yau-Hung Chen
- Graduate Institute of Life Sciences, Tamkang University, No. 151 Ying-chuan Road, Tamsui, Taipei County, Taiwan.
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28
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Van den Maagdenberg K, Stinckens A, Claeys E, Buys N, De Smet S. Effect of the insulin-like growth factor-II and RYR1 genotype in pigs on carcass and meat quality traits. Meat Sci 2008; 80:293-303. [PMID: 22063334 DOI: 10.1016/j.meatsci.2007.12.008] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2007] [Revised: 11/23/2007] [Accepted: 12/10/2007] [Indexed: 11/15/2022]
Abstract
Recently, a new QTN (quantitative trait nucleotide), which is located in the regulatory sequence of the imprinted IGF-II gene was discovered in the pig and is associated with a significant increase in IGF-II mRNA expression in skeletal muscle during postnatal growth. The aim of the current study was to investigate the effect of the IGF-II paternal allele (Apat and Gpat animals that inherited, respectively, the mutant and wild type paternal allele of interest) on carcass and meat quality traits in Nn and NN RYR1 genotypes. A total of 141 animals were measured, almost equally distributed over the IGF-II and RYR1 genotypes and gender. The Apat allele increased carcass lean meat percentage with approximately 4.5% (P<0.001) as a result of decreased backfat thickness. Average live weight daily gain was not affected, hence average daily lean meat gain was significantly higher for Apat compared to Gpat animals. The IGF-II mutation had no noticeable effect on meat quality in contrast with the RYR1 mutation. No interaction effects of both mutations on meat quality were noticed.
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Affiliation(s)
- K Van den Maagdenberg
- Laboratory for Animal Nutrition and Animal Product Quality, Department of Animal Production, Ghent University, Proefhoevestraat 10, 9090 Melle, Belgium
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29
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An Ryr1I4895T mutation abolishes Ca2+ release channel function and delays development in homozygous offspring of a mutant mouse line. Proc Natl Acad Sci U S A 2007; 104:18537-42. [PMID: 18003898 DOI: 10.1073/pnas.0709312104] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A heterozygous Ile4898 to Thr (I4898T) mutation in the human type 1 ryanodine receptor/Ca(2+) release channel (RyR1) leads to a severe form of central core disease. We created a mouse line in which the corresponding Ryr1(I4895T) mutation was introduced by using a "knockin" protocol. The heterozygote does not exhibit an overt disease phenotype, but homozygous (IT/IT) mice are paralyzed and die perinatally, apparently because of asphyxia. Histological analysis shows that IT/IT mice have greatly reduced and amorphous skeletal muscle. Myotubes are small, nuclei remain central, myofibrils are disarranged, and no cross striation is obvious. Many areas indicate probable degeneration, with shortened myotubes containing central stacks of pyknotic nuclei. Other manifestations of a delay in completion of late stages of embryogenesis include growth retardation and marked delay in ossification, dermatogenesis, and cardiovascular development. Electron microscopy of IT/IT muscle demonstrates appropriate targeting and positioning of RyR1 at triad junctions and a normal organization of dihydropyridine receptor (DHPR) complexes into RyR1-associated tetrads. Functional studies carried out in cultured IT/IT myotubes show that ligand-induced and DHPR-activated RyR1 Ca(2+) release is absent, although retrograde enhancement of DHPR Ca(2+) conductance is retained. IT/IT mice, in which RyR1-mediated Ca(2+) release is abolished without altering the formation of the junctional DHPR-RyR1 macromolecular complex, provide a valuable model for elucidation of the role of RyR1-mediated Ca(2+) signaling in mammalian embryogenesis.
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30
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Castaldi L, Serra C, Moretti F, Messina G, Paoletti R, Sampaolesi M, Torgovnick A, Baiocchi M, Padula F, Pisaniello A, Molinaro M, Cossu G, Levrero M, Bouché M. Bisperoxovanadium, a phospho-tyrosine phosphatase inhibitor, reprograms myogenic cells to acquire a pluripotent, circulating phenotype. FASEB J 2007; 21:3573-83. [PMID: 17601985 DOI: 10.1096/fj.06-7454com] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Satellite cells are the main source of myogenic progenitors in postnatal skeletal muscle, but their use in cell therapy for muscle disorders is limited because these cells cannot be delivered through circulation and they are rapidly exhausted in severe myopathies. The search for alternative donor cells is ongoing, but none of the candidates so far show all the features required for successful colonization and repair of diseased muscle. In this study, we show that bisperoxovanadium, a phospho-tyrosine phosphatase inhibitor, induces myogenic cells to acquire a gene expression profile and a differentiation potential consistent with the phenotype of a circulating precursors, while maintaining their myogenic potential. These effects are mediated, at least in part, by NF-kappaB activation through the Tyr42-IkappaB-alpha phosphorylation, as shown by the expression of the dominant negative mutant form of the p50 NF-kappaB subunit. Moreover, when bisperoxovanadium-treated cells are injected into the femoral artery of alpha-sarcoglican null dystrophic mice, they are able to circulate and to reach muscle tissue; importantly, they contribute to muscle regeneration, as shown by the expression of alpha-sarcoglican in some fibers. Our observations indicate that bisperoxovanadium, or similar compounds, may prove very valuable to obtain and to expand, from committed cells, multipotent cell populations suitable for gene-cell therapy applications and may help to understand the molecular basis of genome reprogramming and "stem-ness."
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Affiliation(s)
- L Castaldi
- Department of Histology and Med. Embr., Univ. of Rome La Sapienza, Via A. Scarpa 14, 00161 Rome, Italy
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31
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Luin E, Ruzzier F. The role of L- and T-type Ca2+ currents during the in vitro aging of murine myogenic (i28) cells in culture. Cell Calcium 2007; 41:479-89. [PMID: 17064763 DOI: 10.1016/j.ceca.2006.09.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2006] [Revised: 07/28/2006] [Accepted: 09/10/2006] [Indexed: 01/29/2023]
Abstract
The age-related decline in skeletal muscle strength could, in part, result from alterations in the mechanism of excitation-contraction coupling, responsible for muscle contraction. In the present work, we used the in vitro aging of murine myogenic (i28) cells as a model, to investigate whether the inefficiency of aged satellite cells to generate functional skeletal muscle fibres could be partly due to defective voltage-dependent Ca2+ currents. The whole-cell patch clamp technique was employed to measure L- and T-type Ca2+ currents in myotubes derived from the differentiation and fusion of these cells reaching replicative senescence. Our data showed that the expression and the amplitude of these currents decreased significantly during in vitro aging. Moreover, the analysis of the L-type current evoked in young and old cells by positive voltage steps, revealed no differences in the kinetics of activation, but significant alterations in the rate of inactivation. These effects of in vitro aging on voltage-dependent Ca2+ currents could also be related to their inability to fuse into myotubes. Taken together, our data support the hypothesis that age-related effects on voltage-dependent L- and T-type currents could be one of the causes of the failure of satellite cells to efficiently counteract the impairment in muscle force.
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Affiliation(s)
- Elisa Luin
- Department of Physiology and Pathology and Centre for Neuroscience BRAIN, University of Trieste, Via A. Fleming 22, I-34127 Trieste, Italy.
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32
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Abstract
A variety of Ca2+ signals, in the form of intercellular pulses and waves, have been reported to be associated with the various sequential stages of somitogenesis: from convergent extension and the formation of the paraxial mesoderm; during the patterning of the paraxial mesoderm to establish segmental units; throughout the formation of the morphological boundaries that delineate the segmental units, and finally from within the maturing somites as they undergo subsequent development and differentiation. Due to both the technical challenges presented in imaging intact, developing embryos, and the subtle nature of the Ca2+ transients generated, they have proved to be difficult to visualize. However, a combination of cultured cell preparations and improvements in explant and whole embryo imaging techniques has begun to reveal a new and exciting class of developmental Ca2+ signals. In this chapter, we review the small, but expanding, number of reports in the literature and attempt to identify common characteristics of the somitogenic Ca2+ transients, such as their mode of generation, as well as their spatial and temporal features. This may help to elucidate the significance and function of these intriguing Ca2+ transients and thus integrate them into the complex signaling networks that orchestrate early developmental events.
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Affiliation(s)
- Sarah E Webb
- Department of Biology, the Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong SAR, China
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33
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Brailoiu E, Churamani D, Pandey V, Brailoiu GC, Tuluc F, Patel S, Dun NJ. Messenger-specific role for nicotinic acid adenine dinucleotide phosphate in neuronal differentiation. J Biol Chem 2006; 281:15923-8. [PMID: 16595650 DOI: 10.1074/jbc.m602249200] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Cells possess several Ca2+-mobilizing messengers, which couple stimulation at the cell surface by a multitude of extracellular cues to the regulation of intracellular Ca2+-sensitive targets. Recent studies suggest that agonists differentially select from this molecular palette to generate their characteristic Ca2+ signals but it is still unclear whether different messengers mediate different functions or whether they act in a redundant fashion. In this study, we compared the effects of nicotinic acid adenine dinucleotide phosphate (NAADP), a novel Ca2+-mobilizing messenger, with that of the prototypical messenger inositol trisphosphate on cytosolic Ca2+ levels and differentiation status of PC12 cells. We demonstrate that liposomal delivery of NAADP mediated release of Ca2+ from acidic Ca2+ stores and that this stimulus was sufficient to drive differentiation of the cells to a neuronal-like phenotype. In sharp contrast, cell fate was unaffected by more transient Ca2+ signals generated by inositol trisphosphate-evoked release of endoplasmic reticulum Ca2+ stores. Our data establish for the first time (i) the presence of novel NAADP-sensitive Ca2+ stores in PC12 cells, (ii) a role for NAADP in differentiation, and (iii) that Ca2+-dependent function can be messenger-specific. Thus, differential recruitment of intracellular Ca2+-mobilizing messengers and their target Ca2+ stores may represent a robust means of maintaining stimulus fidelity in the control of Ca2+-dependent cell function.
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Affiliation(s)
- Eugen Brailoiu
- Department of Pharmacology, Temple University Medical School, Philadelphia, Pennsylvania, USA
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34
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Campbell NR, Podugu SP, Ferrari MB. Spatiotemporal characterization of short versus long duration calcium transients in embryonic muscle and their role in myofibrillogenesis. Dev Biol 2006; 292:253-64. [PMID: 16460724 DOI: 10.1016/j.ydbio.2005.11.040] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2005] [Revised: 11/10/2005] [Accepted: 11/29/2005] [Indexed: 10/25/2022]
Abstract
Intracellular calcium (Ca(2+)) signals are essential for several aspects of muscle development, including myofibrillogenesis-the terminal differentiation of the sarcomeric lattice. Ryanodine receptor (RyR) Ca(2+) stores must be operative during this period and contribute to the production of spontaneous global Ca(2+) transients of long duration (LDTs; mean duration approximately 80 s). In this study, high-speed confocal imaging of intracellular Ca(2+) in embryonic myocytes reveals a novel class of spontaneous Ca(2+) transient. These short duration transients (SDTs; mean duration approximately 2 s) are blocked by ryanodine, independent of extracellular Ca(2+), insensitive to changes in membrane potential, and propagate in the subsarcolemmal space. SDTs arise from RyR stores localized to the subsarcolemmal space during myofibrillogenesis. While both LDTs and SDTs occur prior to myofibrillogenesis, LDT production ceases and only SDTs persist during a period of rapid sarcomere assembly. However, eliminating SDTs during this period results in only minor myofibril disruption. On the other hand, artificial extension of LDT production completely inhibits sarcomere assembly. In conjunction with earlier work, these results suggest that LDTs have at least two roles during myofibrillogenesis-activation of sarcoplasmic regulatory cascades and regulation of gene expression. The distinct spatiotemporal patterns of LDTs versus SDTs may be utilized for differential regulation of cytosolic cascades, control of nuclear gene expression, and localized activation of assembly events at the sarcolemma.
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Affiliation(s)
- Nolan R Campbell
- School of Biological Sciences, University of Missouri, 5100 Rockhill Road, Kansas City, MO 64110-2499, USA.
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35
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Arnaudeau S, Holzer N, König S, Bader CR, Bernheim L. Calcium sources used by post-natal human myoblasts during initial differentiation. J Cell Physiol 2006; 208:435-45. [PMID: 16688780 DOI: 10.1002/jcp.20679] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Increases in cytoplasmic Ca(2+) are crucial for inducing the initial steps of myoblast differentiation that ultimately lead to fusion; yet the mechanisms that produce this elevated Ca(2+) have not been fully resolved. For example, it is still unclear whether the increase comes exclusively from membrane Ca(2+) influx or also from Ca(2+) release from internal stores. To address this, we investigated early differentiation of myoblast clones each derived from single post-natal human satellite cells. Initial differentiation was assayed by immunostaining myonuclei for the transcription factor MEF2. When Ca(2+) influx was eliminated by using low external Ca(2+) media, we found that approximately half the clones could still differentiate. Of the clones that required influx of external Ca(2+), most clones used T-type Ca(2+) channels, but others used store-operated channels as influx-generating mechanisms. On the other hand, clones that differentiated in low external Ca(2+) relied on Ca(2+) release from internal stores through IP(3) receptors. Interestingly, by following clones over time, we observed that some switched their preferred Ca(2+) source: clones that initially used calcium release from internal stores to differentiate later required Ca(2+) influx and inversely. In conclusion, we show that human myoblasts can use three alternative mechanisms to increase cytoplasmic Ca(2+) at the onset of the differentiation process: influx through T-types Ca(2+) channels, influx through store operated channels and release from internal stores through IP(3) receptors. In addition, we suggest that, probably because Ca(2+) elevation is essential during initial differentiation, myoblasts may be able to select between these alternate Ca(2+) pathways.
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Affiliation(s)
- Serge Arnaudeau
- Département de Neurosciences Fondamentales, Centre Médical Universitaire, Genève, Switzerland.
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36
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Stiber JA, Tabatabaei N, Hawkins AF, Hawke T, Worley PF, Williams RS, Rosenberg P. Homer modulates NFAT-dependent signaling during muscle differentiation. Dev Biol 2005; 287:213-24. [PMID: 16226241 DOI: 10.1016/j.ydbio.2005.06.030] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2004] [Revised: 06/10/2005] [Accepted: 06/30/2005] [Indexed: 10/25/2022]
Abstract
While changes in intracellular calcium are well known to influence muscle contraction through excitation contraction coupling, little is understood of the calcium signaling events regulating gene expression through the calcineurin/NFAT pathway in muscle. Here, we demonstrate that Ca(+2) released via the inositol trisphosphate receptor (IP3R) increases nuclear entry of NFAT in undifferentiated skeletal myoblasts, but the IP3R Ca(+2) pool in differentiated myotubes promotes nuclear exit of NFAT despite a comparable quantitative change in [Ca(+2)]i. In contrast, Ca(+2) released via ryanodine receptors (RYR) increases NFAT nuclear entry in myotubes. The scaffolding protein Homer, known to interact with both IP3R and RYR, is expressed as part of the myogenic differentiation program and enhances NFAT-dependent signaling by increasing RYR Ca(+2) release. These results demonstrate that differentiated skeletal myotubes employ discrete pools of intracellular calcium to restrain (IP3R pool) or activate (RYR pool) NFAT-dependent signaling, in a manner distinct from undifferentiated myoblasts. The selective expression of Homer proteins contributes to these differentiation-dependent features of calcium signaling.
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MESH Headings
- Active Transport, Cell Nucleus
- Animals
- Animals, Newborn
- Caffeine
- Calcium/metabolism
- Calcium Channels/metabolism
- Calcium Signaling
- Carrier Proteins/physiology
- Cell Differentiation/physiology
- Cell Nucleus/metabolism
- Cells, Cultured
- Embryo, Mammalian/metabolism
- Homer Scaffolding Proteins
- Inositol 1,4,5-Trisphosphate Receptors
- Mice
- Mice, Knockout
- Muscle Fibers, Skeletal/cytology
- Muscle Fibers, Skeletal/metabolism
- Muscle, Skeletal/embryology
- Muscle, Skeletal/growth & development
- Muscle, Skeletal/metabolism
- Myoblasts/cytology
- Myoblasts/metabolism
- NFATC Transcription Factors/metabolism
- NFATC Transcription Factors/physiology
- Receptors, Cytoplasmic and Nuclear/metabolism
- Ryanodine Receptor Calcium Release Channel/metabolism
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Affiliation(s)
- Jonathan A Stiber
- Department of Medicine, Duke University, 4321 Medical Park Drive, Suite 200, Durham, NC 27704, USA
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37
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Lee SM, Lee JW, Song YS, Hwang DY, Kim YK, Nam SY, Kim DJ, Yun YW, Yoon DY, Hong JT. Ryanodine receptor-mediated interference of neuronal cell differentiation by presenilin 2 mutation. J Neurosci Res 2005; 82:542-50. [PMID: 16240390 DOI: 10.1002/jnr.20655] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Neuronal cell differentiation alterations induced by mutant presenilin 2 (PS2) were investigated in transgenic mice expressing wild-type or mutant-type PS2. Progressive increases in differentiation and marker protein expression were found in neuronal cells expressing wild-type PS2, whereas these processes were much perturbed in mutant-type PS2 with elevated ryanodine-receptor (RyR) expression and intracellular calcium levels. Moreover, dantrolene, a blocker of RyR reduced the PS2 mutation-induced interference of cell differentiation and calcium release, but caffeine, an activator of RyR, exacerbated PS2 mutation-induced interference with cell differentiation. Our results indicate that mutant PS2 inhibits normal neuronal cell differentiation and that RyR-mediated calcium overrelease may be a significant factor.
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Affiliation(s)
- Sang Min Lee
- College of Pharmacy, Chungbuk National University, Chungbuk, Korea
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38
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Chuang CF, Bargmann CI. A Toll-interleukin 1 repeat protein at the synapse specifies asymmetric odorant receptor expression via ASK1 MAPKKK signaling. Genes Dev 2004; 19:270-81. [PMID: 15625192 PMCID: PMC545892 DOI: 10.1101/gad.1276505] [Citation(s) in RCA: 147] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A stochastic lateral signaling interaction between two developing Caenorhabditis elegans AWC olfactory neurons causes them to take on asymmetric patterns of odorant receptor expression, called AWC(OFF) and AWC(ON). Here we show that the AWC lateral signaling gene tir-1 (previously known as nsy-2) encodes a conserved post-synaptic protein that specifies the choice between AWC(OFF) and AWC(ON). Genetic evidence suggests that tir-1 acts downstream of a voltage-gated calcium channel and CaMKII (UNC-43) to regulate AWC asymmetry via the NSY-1(ASK1) p38/JNK MAP (mitogen-activated protein) kinase cascade. TIR-1 localizes NSY-1 to post-synaptic regions of AWC, and TIR-1 binds UNC-43, suggesting that it assembles a synaptic signaling complex that regulates odorant receptor expression. Temperature-shift experiments indicate that tir-1 affects AWC during a critical period late in embryogenesis, near the time of AWC synapse formation. TIR-1 is a multidomain protein with a TIR (Toll-interleukin-1 receptor) domain that activates signaling, SAM repeats that mediate localization to post-synaptic regions of axons, and an N-terminal inhibitory domain. TIR-1 and other TIR proteins are implicated in vertebrate and invertebrate innate immunity, as are NSY-1/ASK1 kinases, so this pathway may also have a conserved function in immune signaling.
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Affiliation(s)
- Chiou-Fen Chuang
- Howard Hughes Medical Institute, The Rockefeller University, New York, NY 10021, USA
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39
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Chiarella P, Puglisi R, Sorrentino V, Boitani C, Stefanini M. Ryanodine receptors are expressed and functionally active in mouse spermatogenic cells and their inhibition interferes with spermatogonial differentiation. J Cell Sci 2004; 117:4127-34. [PMID: 15280431 DOI: 10.1242/jcs.01283] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Ryanodine receptors (RyRs) are intracellular calcium release channels that are highly expressed in striated muscle and neurons but are also detected in several non-excitable cells. We have studied the expression of the three RyR isoforms in male germ cells at different stages of maturation by western blot and RT-PCR. RyR1 was expressed in spermatogonia, pachytene spermatocytes and round spermatids whereas RyR2 was found only in 5- to 10-day-old testis but not in germ cells. RyR3 was not revealed at the protein level, although its mRNA was detected in mixed populations of germ cells. Caffeine, a known agonist of RyRs, was able to induce release of Ca2+ from intracellular stores in spermatogonia, pachytene spermatocytes and round spermatids, but not spermatozoa. Treatment with high doses of ryanodine, which are known to block RyR channel activity, reduced spermatogonial proliferation and induced meiosis in in vitro organ cultures of testis from 7-day-old mice. In conclusion, the results presented here indicate that RyRs are present in germ cells and that calcium mobilization through RyR channels could participate to the regulation of male germ maturation.
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Affiliation(s)
- Pieranna Chiarella
- Department of Histology and Medical Embryology and Centro di Eccellenza Biologia e Medicina Molecolare, University of Rome La Sapienza, Via A. Scarpa 14, 00161 Roma, Italy
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