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Januel C, Menduti G, Mamchaoui K, Martinat C, Artero R, Konieczny P, Boido M. Moxifloxacin rescues SMA phenotypes in patient-derived cells and animal model. Cell Mol Life Sci 2022; 79:441. [PMID: 35864358 PMCID: PMC9304069 DOI: 10.1007/s00018-022-04450-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2022] [Revised: 05/30/2022] [Accepted: 06/25/2022] [Indexed: 11/25/2022]
Abstract
Spinal muscular atrophy (SMA) is a genetic disease resulting in the loss of α-motoneurons followed by muscle atrophy. It is caused by knock-out mutations in the survival of motor neuron 1 (SMN1) gene, which has an unaffected, but due to preferential exon 7 skipping, only partially functional human-specific SMN2 copy. We previously described a Drosophila-based screening of FDA-approved drugs that led us to discover moxifloxacin. We showed its positive effect on the SMN2 exon 7 splicing in SMA patient-derived skin cells and its ability to increase the SMN protein level. Here, we focus on moxifloxacin's therapeutic potential in additional SMA cellular and animal models. We demonstrate that moxifloxacin rescues the SMA-related molecular and phenotypical defects in muscle cells and motoneurons by improving the SMN2 splicing. The consequent increase of SMN levels was higher than in case of risdiplam, a potent exon 7 splicing modifier, and exceeded the threshold necessary for a survival improvement. We also demonstrate that daily subcutaneous injections of moxifloxacin in a severe SMA murine model reduces its characteristic neuroinflammation and increases the SMN levels in various tissues, leading to improved motor skills and extended lifespan. We show that moxifloxacin, originally used as an antibiotic, can be potentially repositioned for the SMA treatment.
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Affiliation(s)
- Camille Januel
- INSERM/UEVE, UMR 861, Université Paris Saclay, I-STEM, AFM-Telethon, Rue Henri Desbruères, 91100, Corbeil-Essonnes, France
| | - Giovanna Menduti
- Department of Neuroscience "Rita Levi Montalcini", Neuroscience Institute Cavalieri Ottolenghi, University of Turin, Regione Gonzole 10, Orbassano, 10043, Turin, TO, Italy
| | - Kamel Mamchaoui
- Sorbonne Université, Inserm, Institut de Myologie, Centre de Recherche en Myologie, 75013, Paris, France
| | - Cecile Martinat
- INSERM/UEVE, UMR 861, Université Paris Saclay, I-STEM, AFM-Telethon, Rue Henri Desbruères, 91100, Corbeil-Essonnes, France.
| | - Ruben Artero
- University Institute of Biotechnology and Biomedicine (BIOTECMED), Universitat de València, Street Dr. Moliner, 50, 46100, Burjasot, Valencia, Spain.
- Translational Genomics Group, Incliva Biomedical Research Institute, Avenue Menéndez Pelayo 4 acc, 46010, Valencia, Spain.
| | - Piotr Konieczny
- University Institute of Biotechnology and Biomedicine (BIOTECMED), Universitat de València, Street Dr. Moliner, 50, 46100, Burjasot, Valencia, Spain
- Translational Genomics Group, Incliva Biomedical Research Institute, Avenue Menéndez Pelayo 4 acc, 46010, Valencia, Spain
| | - Marina Boido
- Department of Neuroscience "Rita Levi Montalcini", Neuroscience Institute Cavalieri Ottolenghi, University of Turin, Regione Gonzole 10, Orbassano, 10043, Turin, TO, Italy
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Jacquier A, Risson V, Simonet T, Roussange F, Lacoste N, Ribault S, Carras J, Theuriet J, Girard E, Grosjean I, Le Goff L, Kröger S, Meltoranta J, Bauché S, Sternberg D, Fournier E, Kostera-Pruszczyk A, O’Connor E, Eymard B, Lochmüller H, Martinat C, Schaeffer L. Severe congenital myasthenic syndromes caused by agrin mutations affecting secretion by motoneurons. Acta Neuropathol 2022; 144:707-731. [PMID: 35948834 PMCID: PMC9468088 DOI: 10.1007/s00401-022-02475-8] [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: 02/01/2022] [Revised: 07/25/2022] [Accepted: 07/25/2022] [Indexed: 01/28/2023]
Abstract
Congenital myasthenic syndromes (CMS) are predominantly characterized by muscle weakness and fatigability and can be caused by a variety of mutations in genes required for neuromuscular junction formation and maintenance. Among them, AGRN encodes agrin, an essential synaptic protein secreted by motoneurons. We have identified severe CMS patients with uncharacterized p.R1671Q, p.R1698P and p.L1664P mutations in the LG2 domain of agrin. Overexpression in primary motoneurons cultures in vitro and in chick spinal motoneurons in vivo revealed that the mutations modified agrin trafficking, leading to its accumulation in the soma and/or in the axon. Expression of mutant agrins in cultured cells demonstrated accumulation of agrin in the endoplasmic reticulum associated with induction of unfolded protein response (UPR) and impaired secretion in the culture medium. Interestingly, evaluation of the specific activity of individual agrins on AChR cluster formation indicated that when secreted, mutant agrins retained a normal capacity to trigger the formation of AChR clusters. To confirm agrin accumulation and secretion defect, iPS cells were derived from a patient and differentiated into motoneurons. Patient iPS-derived motoneurons accumulated mutant agrin in the soma and increased XBP1 mRNA splicing, suggesting UPR activation. Moreover, co-cultures of patient iPS-derived motoneurons with myotubes confirmed the deficit in agrin secretion and revealed a reduction in motoneuron survival. Altogether, we report the first mutations in AGRN gene that specifically affect agrin secretion by motoneurons. Interestingly, the three patients carrying these mutations were initially suspected of spinal muscular atrophy (SMA). Therefore, in the presence of patients with a clinical presentation of SMA but without mutation in the SMN1 gene, it can be worth to look for mutations in AGRN.
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Affiliation(s)
- Arnaud Jacquier
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France ,grid.413852.90000 0001 2163 3825Hospices Civils de Lyon, Groupement Est, Bron, France
| | - Valérie Risson
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France
| | - Thomas Simonet
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France ,grid.413852.90000 0001 2163 3825Hospices Civils de Lyon, Groupement Est, Bron, France
| | - Florine Roussange
- grid.503216.30000 0004 0618 2124INSERM/UEPS UMR 861, Paris Saclay Université, I-STEM, 91100 Corbeil-Essonnes, France
| | - Nicolas Lacoste
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France
| | - Shams Ribault
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France ,grid.413852.90000 0001 2163 3825Service de Médecine Physique et de Réadaptation, Hôpital Henry Gabrielle, Hospices Civils de Lyon, 69230 Saint-Genis-Laval, France
| | - Julien Carras
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France ,grid.413852.90000 0001 2163 3825Hospices Civils de Lyon, Groupement Est, Bron, France
| | - Julian Theuriet
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France ,grid.413852.90000 0001 2163 3825Hospices Civils de Lyon, Groupement Est, Bron, France
| | - Emmanuelle Girard
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France
| | - Isabelle Grosjean
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France
| | - Laure Le Goff
- grid.413852.90000 0001 2163 3825Hospices Civils de Lyon, Groupement Est, Bron, France
| | - Stephan Kröger
- Department of Physiological Genomics, Biomedical Center, Planegg, Martinsried, Germany
| | - Julia Meltoranta
- Department of Physiological Genomics, Biomedical Center, Planegg, Martinsried, Germany
| | - Stéphanie Bauché
- grid.462844.80000 0001 2308 1657Inserm U 1127, CNRS UMR 7225, UPMC Université Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle Épinière, ICM, Sorbonne Universités, 75013 Paris, France
| | - Damien Sternberg
- grid.462844.80000 0001 2308 1657Inserm U 1127, CNRS UMR 7225, UPMC Université Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle Épinière, ICM, Sorbonne Universités, 75013 Paris, France ,grid.411439.a0000 0001 2150 9058APHP, UF Cardiogénétique et Myogénétique, Service de Biochimie Métabolique, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Emmanuel Fournier
- grid.462844.80000 0001 2308 1657Inserm U 1127, CNRS UMR 7225, UPMC Université Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle Épinière, ICM, Sorbonne Universités, 75013 Paris, France ,grid.411439.a0000 0001 2150 9058AP-HP, Hôpital Pitié-Salpêtrière, 75013 Paris, France ,grid.462844.80000 0001 2308 1657Département d’Éthique de l’Université et des enseignements de Physiologie de la Faculté de Médecine Pitié-Salpêtrière, 75013 Paris, France
| | - Anna Kostera-Pruszczyk
- grid.13339.3b0000000113287408Department of Neurology, Medical University of Warsaw, Warsaw, Poland
| | - Emily O’Connor
- grid.28046.380000 0001 2182 2255Division of Neurology, Department of Medicine, Children’s Hospital of Eastern Ontario Research Institute, The Ottawa Hospital and Brain and Mind Research Institute, University of Ottawa, Ottawa, Canada
| | - Bruno Eymard
- grid.462844.80000 0001 2308 1657Inserm U 1127, CNRS UMR 7225, UPMC Université Paris 06 UMR S 1127, Institut du Cerveau et de la Moelle Épinière, ICM, Sorbonne Universités, 75013 Paris, France ,grid.411439.a0000 0001 2150 9058AP-HP, Hôpital Pitié-Salpêtrière, 75013 Paris, France
| | - Hanns Lochmüller
- grid.28046.380000 0001 2182 2255Division of Neurology, Department of Medicine, Children’s Hospital of Eastern Ontario Research Institute, The Ottawa Hospital and Brain and Mind Research Institute, University of Ottawa, Ottawa, Canada
| | - Cécile Martinat
- grid.503216.30000 0004 0618 2124INSERM/UEPS UMR 861, Paris Saclay Université, I-STEM, 91100 Corbeil-Essonnes, France
| | - Laurent Schaeffer
- Pathophysiology and Genetics of Neuron and Muscle, Faculté de Médecine Lyon Est, CNRS UMR 5261, INSERM U1315, Université Lyon1, Lyon, France ,grid.413852.90000 0001 2163 3825Hospices Civils de Lyon, Groupement Est, Bron, France
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Brunetti J, Koenig S, Monnier A, Frieden M. Nanopattern surface improves cultured human myotube maturation. Skelet Muscle 2021; 11:12. [PMID: 33952323 PMCID: PMC8097894 DOI: 10.1186/s13395-021-00268-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 04/19/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In vitro maturation of human primary myoblasts using 2D culture remains a challenging process and leads to immature fibers with poor internal organization and function. This would however represent a valuable system to study muscle physiology or pathophysiology from patient myoblasts, at a single-cell level. METHODS Human primary myoblasts were cultured on 800-nm wide striated surface between two layers of Matrigel, and in a media supplemented with an inhibitor of TGFβ receptor. Gene expression, immunofluorescence, and Ca2+ measurements upon electrical stimulations were performed at various time points during maturation to assess the organization and function of the myotubes. RESULTS We show that after 10 days in culture, myotubes display numerous functional acetylcholine receptor clusters and express the adult isoforms of myosin heavy chain and dihydropyridine receptor. In addition, the myotubes are internally well organized with striations of α-actinin and STIM1, and occasionally ryanodine receptor 1. We also demonstrate that the myotubes present robust Ca2+ responses to repetitive electrical stimulations. CONCLUSION The present method describes a fast and efficient system to obtain well matured and functional myotubes in 2D culture allowing thorough analysis of single-cell Ca2+ signals.
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Affiliation(s)
- Jessica Brunetti
- Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
| | - Stéphane Koenig
- Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
| | - Arthur Monnier
- Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
| | - Maud Frieden
- Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland.
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Lautaoja JH, Pekkala S, Pasternack A, Laitinen M, Ritvos O, Hulmi JJ. Differentiation of Murine C2C12 Myoblasts Strongly Reduces the Effects of Myostatin on Intracellular Signaling. Biomolecules 2020; 10:biom10050695. [PMID: 32365803 PMCID: PMC7277184 DOI: 10.3390/biom10050695] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 04/24/2020] [Accepted: 04/28/2020] [Indexed: 12/14/2022] Open
Abstract
Alongside in vivo models, a simpler and more mechanistic approach is required to study the effects of myostatin on skeletal muscle because myostatin is an important negative regulator of muscle size. In this study, myostatin was administered to murine (C2C12) and human (CHQ) myoblasts and myotubes. Canonical and noncanonical signaling downstream to myostatin, related ligands, and their receptor were analyzed. The effects of tumorkines were analyzed after coculture of C2C12 and colon cancer-C26 cells. The effects of myostatin on canonical and noncanonical signaling were strongly reduced in C2C12 cells after differentiation. This may be explained by increased follistatin, an endogenous blocker of myostatin and altered expression of activin receptor ligands. In contrast, CHQ cells were equally responsive to myostatin, and follistatin remained unaltered. Both myostatin administration and the coculture stimulated pathways associated with inflammation, especially in C2C12 cells. In conclusion, the effects of myostatin on intracellular signaling may be cell line- or organism-specific, and C2C12 myotubes seem to be a nonoptimal in vitro model for investigating the effects of myostatin on canonical and noncanonical signaling in skeletal muscle. This may be due to altered expression of activin receptor ligands and their regulators during muscle cell differentiation.
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Affiliation(s)
- Juulia H. Lautaoja
- Faculty of Sport and Health Sciences, Neuromuscular Research Center, University of Jyväskylä, 40014 Jyväskylä, Finland; (S.P.); (J.J.H.)
- Correspondence: ; Tel.: +358-40-805-5042
| | - Satu Pekkala
- Faculty of Sport and Health Sciences, Neuromuscular Research Center, University of Jyväskylä, 40014 Jyväskylä, Finland; (S.P.); (J.J.H.)
| | - Arja Pasternack
- Department of Physiology, Faculty of Medicine, University of Helsinki, 00290 Helsinki, Finland; (A.P.); (O.R.)
| | - Mika Laitinen
- Department of Medicine, Faculty of Medicine, University of Helsinki, 00029 Helsinki, Finland;
- Department of Medicine, Helsinki University Hospital, 00029 Helsinki, Finland
| | - Olli Ritvos
- Department of Physiology, Faculty of Medicine, University of Helsinki, 00290 Helsinki, Finland; (A.P.); (O.R.)
| | - Juha J. Hulmi
- Faculty of Sport and Health Sciences, Neuromuscular Research Center, University of Jyväskylä, 40014 Jyväskylä, Finland; (S.P.); (J.J.H.)
- Department of Physiology, Faculty of Medicine, University of Helsinki, 00290 Helsinki, Finland; (A.P.); (O.R.)
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5
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Bensalah M, Klein P, Riederer I, Chaouch S, Muraine L, Savino W, Butler-Browne GS, Trollet C, Mouly V, Bigot A, Negroni E. Combined methods to evaluate human cells in muscle xenografts. PLoS One 2019; 14:e0211522. [PMID: 31048846 PMCID: PMC6497248 DOI: 10.1371/journal.pone.0211522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2019] [Accepted: 04/19/2019] [Indexed: 11/18/2022] Open
Abstract
Xenotransplantation of human cells into immunodeficient mouse models is a very powerful tool and an essential step for the pre-clinical evaluation of therapeutic cell- and gene- based strategies. Here we describe an optimized protocol combining immunofluorescence and real-time quantitative PCR to both quantify and visualize the fate and localization of human myogenic cells after injection in regenerating muscles of immunodeficient mice. Whereas real-time quantitative PCR-based method provides an accurate quantification of human cells, it does not document their specific localization. The addition of an immunofluorescence approach using human-specific antibodies recognizing engrafted human cells gives information on the localization of the human cells within the host muscle fibres, in the stem cell niche or in the interstitial space. These two combined approaches offer an accurate evaluation of human engraftment including cell number and localization and should provide a gold standard to compare results obtained either using different types of human stem cells or comparing healthy and pathological muscle stem cells between different research laboratories worldwide.
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Affiliation(s)
- Mona Bensalah
- Sorbonne Université, Myology Research Center, UM76 and INSERM U974, Institut de Myologie, Paris, France
| | - Pierre Klein
- Sorbonne Université, Myology Research Center, UM76 and INSERM U974, Institut de Myologie, Paris, France
| | - Ingo Riederer
- Laboratory on Thymus Research, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil
- Brazilian National Institute of Science and Technology on Neuroimmunomodulation, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Soraya Chaouch
- Sorbonne Université, Myology Research Center, UM76 and INSERM U974, Institut de Myologie, Paris, France
| | - Laura Muraine
- Sorbonne Université, Myology Research Center, UM76 and INSERM U974, Institut de Myologie, Paris, France
| | - Wilson Savino
- Laboratory on Thymus Research, Oswaldo Cruz Institute, Fiocruz, Rio de Janeiro, Brazil
- Brazilian National Institute of Science and Technology on Neuroimmunomodulation, Oswaldo Cruz Institute, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | | | - Capucine Trollet
- Sorbonne Université, Myology Research Center, UM76 and INSERM U974, Institut de Myologie, Paris, France
| | - Vincent Mouly
- Sorbonne Université, Myology Research Center, UM76 and INSERM U974, Institut de Myologie, Paris, France
| | - Anne Bigot
- Sorbonne Université, Myology Research Center, UM76 and INSERM U974, Institut de Myologie, Paris, France
| | - Elisa Negroni
- Sorbonne Université, Myology Research Center, UM76 and INSERM U974, Institut de Myologie, Paris, France
- * E-mail:
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6
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González-Sánchez J, Sánchez-Temprano A, Cid-Díaz T, Pabst-Fernández R, Mosteiro CS, Gallego R, Nogueiras R, Casabiell X, Butler-Browne GS, Mouly V, Relova JL, Pazos Y, Camiña JP. Improvement of Duchenne muscular dystrophy phenotype following obestatin treatment. J Cachexia Sarcopenia Muscle 2018; 9:1063-1078. [PMID: 30216693 PMCID: PMC6240759 DOI: 10.1002/jcsm.12338] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 06/14/2018] [Accepted: 06/26/2018] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND This study was performed to test the therapeutic potential of obestatin, an autocrine anabolic factor regulating skeletal muscle repair, to ameliorate the Duchenne muscular dystrophy (DMD) phenotype. METHODS AND RESULTS Using a multidisciplinary approach, we characterized the ageing-related preproghrelin/GPR39 expression patterns in tibialis anterior (TA) muscles of 4-, 8-, and 18-week-old mdx mice (n = 3/group) and established the effects of obestatin administration at this level in 8-week-old mdx mice (n = 5/group). The findings were extended to in vitro effects on human immortalized DMD myotubes. An analysis of TAs revealed an age-related loss of preproghrelin expression, as precursor of obestatin, in mdx mice. Administration of obestatin resulted in a significant increase in tetanic specific force (33.0% ± 1.5%, P < 0.05), compared with control mdx mice. Obestatin-treated TAs were characterized by reduction of fibres with centrally located nuclei (10.0% ± 1.2%, P < 0.05) together with an increase in the number of type I fibres (25.2% ± 1.7%, P < 0.05) associated to histone deacetylases/myocyte enhancer factor-2 and peroxisome proliferator-activated receptor-gamma coactivator 1α axis, and down-regulation of ubiquitin E3-ligases by inactivation of FoxO1/4, indexes of muscle atrophy. Obestatin reduced the level of contractile damage and tissue fibrosis. These observations correlated with decline in serum creatine kinase (58.8 ± 15.2, P < 0.05). Obestatin led to stabilization of the sarcolemma by up-regulation of utrophin, α-syntrophin, β-dystroglycan, and α7β1-integrin proteins. These pathways were also operative in human DMD myotubes. CONCLUSIONS These results highlight the potential of obestatin as a peptide therapeutic for preserving muscle integrity in DMD, thus allowing a better efficiency of gene or cell therapy in a combined therapeutic approach.
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Affiliation(s)
- Jessica González-Sánchez
- Laboratorio de Endocrinología Celular, Instituto de Investigación Sanitaria de Santiago (IDIS), Complejo Hospitalario Universitario de Santiago (CHUS), Servicio Gallego de Salud (SERGAS), Santiago de Compostela, Spain
| | - Agustín Sánchez-Temprano
- Laboratorio de Endocrinología Celular, Instituto de Investigación Sanitaria de Santiago (IDIS), Complejo Hospitalario Universitario de Santiago (CHUS), Servicio Gallego de Salud (SERGAS), Santiago de Compostela, Spain
| | - Tania Cid-Díaz
- Laboratorio de Endocrinología Celular, Instituto de Investigación Sanitaria de Santiago (IDIS), Complejo Hospitalario Universitario de Santiago (CHUS), Servicio Gallego de Salud (SERGAS), Santiago de Compostela, Spain
| | - Regina Pabst-Fernández
- Laboratorio de Endocrinología Celular, Instituto de Investigación Sanitaria de Santiago (IDIS), Complejo Hospitalario Universitario de Santiago (CHUS), Servicio Gallego de Salud (SERGAS), Santiago de Compostela, Spain
| | - Carlos S Mosteiro
- Laboratorio de Endocrinología Celular, Instituto de Investigación Sanitaria de Santiago (IDIS), Complejo Hospitalario Universitario de Santiago (CHUS), Servicio Gallego de Salud (SERGAS), Santiago de Compostela, Spain
| | - Rosalía Gallego
- Departamento de Ciencias Morfológicas, Universidad de Santiago de Compostela (USC), Santiago de Compostela, Spain
| | - Ruben Nogueiras
- Departamento de Fisiología, USC, Santiago de Compostela, Spain
| | - Xesús Casabiell
- Departamento de Fisiología, USC, Santiago de Compostela, Spain
| | - Gillian S Butler-Browne
- Center for Research in Myology, Sorbonne Universités, UPMC Univ Paris 06, INSERM UMRS 974, Paris, France
| | - Vincent Mouly
- Center for Research in Myology, Sorbonne Universités, UPMC Univ Paris 06, INSERM UMRS 974, Paris, France
| | | | - Yolanda Pazos
- Laboratorio de Patología Digestiva, IDIS, CHUS, SERGAS, Santiago de Compostela, Spain
| | - Jesús P Camiña
- Laboratorio de Endocrinología Celular, Instituto de Investigación Sanitaria de Santiago (IDIS), Complejo Hospitalario Universitario de Santiago (CHUS), Servicio Gallego de Salud (SERGAS), Santiago de Compostela, Spain
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7
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RanBP2 regulates the anti-retroviral activity of TRIM5α by SUMOylation at a predicted phosphorylated SUMOylation motif. Commun Biol 2018; 1:193. [PMID: 30456314 PMCID: PMC6237768 DOI: 10.1038/s42003-018-0198-0] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 10/19/2018] [Indexed: 01/30/2023] Open
Abstract
TRIM5α is a cytoplasmic restriction factor that blocks post-entry retroviral infection. Evidence suggests that its antiviral activity can be regulated by SUMO, but how this is achieved remains unknown. Here, we show that TRIM5α forms a complex with RanGAP1, Ubc9, and RanBP2 at the nuclear pore, and that RanBP2 E3 SUMO ligase promotes the SUMOylation of endogenous TRIM5α in the cytoplasm. Loss of RanBP2 blocked SUMOylation of TRIM5α, altered its localization in primary cells, and suppressed the antiviral activity of both rhesus and human orthologs. In cells, human TRIM5α is modified on K84 within a predicted phosphorylated SUMOylation motif (pSUM) and not on K10 as found in vitro. Non-modified TRIM5α lacked antiviral activity, indicating that only SUMOylated TRIM5α acts as a restriction factor. This work illustrates the importance of the nuclear pore in intrinsic antiviral immunity, acting as a hub where virus, SUMO machinery, and restriction factors can meet. Ghizlane Maarifi et al. demonstrate that a nuclear pore component, RanBP2, SUMOylates the retroviral restriction factor TRIM5α to promote its antiviral activity. This study suggests an unexpected role of the nuclear pore for regulating anti-viral innate immunity.
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8
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Ladislau L, Suárez-Calvet X, Toquet S, Landon-Cardinal O, Amelin D, Depp M, Rodero MP, Hathazi D, Duffy D, Bondet V, Preusse C, Bienvenu B, Rozenberg F, Roos A, Benjamim CF, Gallardo E, Illa I, Mouly V, Stenzel W, Butler-Browne G, Benveniste O, Allenbach Y. JAK inhibitor improves type I interferon induced damage: proof of concept in dermatomyositis. Brain 2018; 141:1609-1621. [DOI: 10.1093/brain/awy105] [Citation(s) in RCA: 125] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Accepted: 02/17/2018] [Indexed: 12/17/2022] Open
Affiliation(s)
- Leandro Ladislau
- Sorbonne Université, INSERM, Association Institut de Myologie, Center of Research in Myology, UMRS 974, AP-HP, Department of Internal Medicine and Clinical Immunology, DHU I2B, Pitié-Salpêtrière Hospital, F-75013, Paris, France
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Xavier Suárez-Calvet
- Sorbonne Université, INSERM, Association Institut de Myologie, Center of Research in Myology, UMRS 974, AP-HP, Department of Internal Medicine and Clinical Immunology, DHU I2B, Pitié-Salpêtrière Hospital, F-75013, Paris, France
- Neuromuscular Diseases Unit, Neurology, Hospital de la Santa Creu i Sant Pau, Universitat Autònoma de Barcelona and Institut de Recerca Sant Pau, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain
| | - Ségolène Toquet
- Sorbonne Université, INSERM, Association Institut de Myologie, Center of Research in Myology, UMRS 974, AP-HP, Department of Internal Medicine and Clinical Immunology, DHU I2B, Pitié-Salpêtrière Hospital, F-75013, Paris, France
| | - Océane Landon-Cardinal
- Sorbonne Université, INSERM, Association Institut de Myologie, Center of Research in Myology, UMRS 974, AP-HP, Department of Internal Medicine and Clinical Immunology, DHU I2B, Pitié-Salpêtrière Hospital, F-75013, Paris, France
| | - Damien Amelin
- Sorbonne Université, INSERM, Association Institut de Myologie, Center of Research in Myology, UMRS 974, AP-HP, Department of Internal Medicine and Clinical Immunology, DHU I2B, Pitié-Salpêtrière Hospital, F-75013, Paris, France
| | - Marine Depp
- Laboratory of Neurogenetics and Neuroinflammation, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR1163 and Université Paris Descartes, Université Sorbonne Paris Cité, Institut Imagine, 75015 Paris, France
| | - Mathieu P Rodero
- Laboratory of Neurogenetics and Neuroinflammation, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR1163 and Université Paris Descartes, Université Sorbonne Paris Cité, Institut Imagine, 75015 Paris, France
| | - Denisa Hathazi
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V, Biomedical Research Department, Tissue Omics group, Otto-Hahn-Str. 6b, 44227, Dortmund, Germany
| | - Darragh Duffy
- INSERM UMR 1223 and Laboratory of Dendritic Cell Immunobiology, Institut Pasteur, Paris, France
| | - Vincent Bondet
- INSERM UMR 1223 and Laboratory of Dendritic Cell Immunobiology, Institut Pasteur, Paris, France
| | - Corinna Preusse
- Department of Neuropathology, Charité University, Berlin, Germany
| | - Boris Bienvenu
- Department of Internal Medicine, Saint Joseph Hospital, Marseille, France
| | - Flore Rozenberg
- Departement de Virologie, Hôpital Cochin, Paris Descartes Universités, Paris, France
| | - Andreas Roos
- Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V, Biomedical Research Department, Tissue Omics group, Otto-Hahn-Str. 6b, 44227, Dortmund, Germany
- Institute of Genetic Medicine, John Walton Muscular Dystrophy Research Centre, International Centre for Life, Central Parkway, Newcastle upon Tyne, England, UK
| | - Claudia F Benjamim
- Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Eduard Gallardo
- Neuromuscular Diseases Unit, Neurology, Hospital de la Santa Creu i Sant Pau, Universitat Autònoma de Barcelona and Institut de Recerca Sant Pau, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain
| | - Isabel Illa
- Neuromuscular Diseases Unit, Neurology, Hospital de la Santa Creu i Sant Pau, Universitat Autònoma de Barcelona and Institut de Recerca Sant Pau, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain
| | - Vincent Mouly
- Sorbonne Université, INSERM, Association Institut de Myologie, Center of Research in Myology, UMRS 974, AP-HP, Department of Internal Medicine and Clinical Immunology, DHU I2B, Pitié-Salpêtrière Hospital, F-75013, Paris, France
| | - Werner Stenzel
- Department of Neuropathology, Charité University, Berlin, Germany
| | - Gillian Butler-Browne
- Sorbonne Université, INSERM, Association Institut de Myologie, Center of Research in Myology, UMRS 974, AP-HP, Department of Internal Medicine and Clinical Immunology, DHU I2B, Pitié-Salpêtrière Hospital, F-75013, Paris, France
| | - Olivier Benveniste
- Sorbonne Université, INSERM, Association Institut de Myologie, Center of Research in Myology, UMRS 974, AP-HP, Department of Internal Medicine and Clinical Immunology, DHU I2B, Pitié-Salpêtrière Hospital, F-75013, Paris, France
| | - Yves Allenbach
- Sorbonne Université, INSERM, Association Institut de Myologie, Center of Research in Myology, UMRS 974, AP-HP, Department of Internal Medicine and Clinical Immunology, DHU I2B, Pitié-Salpêtrière Hospital, F-75013, Paris, France
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9
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Activated dendritic cells modulate proliferation and differentiation of human myoblasts. Cell Death Dis 2018; 9:551. [PMID: 29748534 PMCID: PMC5945640 DOI: 10.1038/s41419-018-0426-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2017] [Revised: 02/08/2018] [Accepted: 02/09/2018] [Indexed: 12/26/2022]
Abstract
Idiopathic Inflammatory Myopathies (IIMs) are a heterogeneous group of autoimmune diseases affecting skeletal muscle tissue homeostasis. They are characterized by muscle weakness and inflammatory infiltration with tissue damage. Amongst the cells in the muscle inflammatory infiltration, dendritic cells (DCs) are potent antigen-presenting and key components in autoimmunity exhibiting an increased activation in inflamed tissues. Since, the IIMs are characterized by the focal necrosis/regeneration and muscle atrophy, we hypothesized that DCs may play a role in these processes. Due to the absence of a reliable in vivo model for IIMs, we first performed co-culture experiments with immature DCs (iDC) or LPS-activated DCs (actDC) and proliferating myoblasts or differentiating myotubes. We demonstrated that both iDC or actDCs tightly interact with myoblasts and myotubes, increased myoblast proliferation and migration, but inhibited myotube differentiation. We also observed that actDCs increased HLA-ABC, HLA-DR, VLA-5, and VLA-6 expression and induced cytokine secretion on myoblasts. In an in vivo regeneration model, the co-injection of human myoblasts and DCs enhanced human myoblast migration, whereas the absolute number of human myofibres was unchanged. In conclusion, we suggest that in the early stages of myositis, DCs may play a crucial role in inducing muscle-damage through cell–cell contact and inflammatory cytokine secretion, leading to muscle regeneration impairment.
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10
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Laakkonen EK, Soliymani R, Karvinen S, Kaprio J, Kujala UM, Baumann M, Sipilä S, Kovanen V, Lalowski M. Estrogenic regulation of skeletal muscle proteome: a study of premenopausal women and postmenopausal MZ cotwins discordant for hormonal therapy. Aging Cell 2017; 16:1276-1287. [PMID: 28884514 PMCID: PMC5676059 DOI: 10.1111/acel.12661] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/23/2017] [Indexed: 12/31/2022] Open
Abstract
Female middle age is characterized by a decline in skeletal muscle mass and performance, predisposing women to sarcopenia, functional limitations, and metabolic dysfunction as they age. Menopausal loss of ovarian function leading to low circulating level of 17β‐estradiol has been suggested as a contributing factor to aging‐related muscle deterioration. However, the underlying molecular mechanisms remain largely unknown and thus far androgens have been considered as a major anabolic hormone for skeletal muscle. We utilized muscle samples from 24 pre‐ and postmenopausal women to establish proteome‐wide profiles, associated with the difference in age (30–34 years old vs. 54–62 years old), menopausal status (premenopausal vs. postmenopausal), and use of hormone replacement therapy (HRT; user vs. nonuser). None of the premenopausal women used hormonal medication while the postmenopausal women were monozygotic (MZ) cotwin pairs of whom the other sister was current HRT user or the other had never used HRT. Label‐free proteomic analyses resulted in the quantification of 797 muscle proteins of which 145 proteins were for the first time associated with female aging using proteomics. Furthermore, we identified 17β‐estradiol as a potential upstream regulator of the observed differences in muscle energy pathways. These findings pinpoint the underlying molecular mechanisms of the metabolic dysfunction accruing upon menopause, thus having implications for understanding the complex functional interactions between female reproductive hormones and health.
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Affiliation(s)
- Eija K. Laakkonen
- Faculty of Sport and Health Sciences Gerontology Research Center University of Jyväskylä Jyväskylä Finland
| | - Rabah Soliymani
- Medicum, Biochemistry/Developmental Biology Meilahti Clinical Proteomics Core Facility University of Helsinki Helsinki Finland
| | - Sira Karvinen
- Faculty of Sport and Health Sciences Gerontology Research Center University of Jyväskylä Jyväskylä Finland
- Divisions of Rehabilitation Science and Physical Therapy Department of Rehabilitation Medicine Medical School University of Minnesota Minneapolis MN USA
| | - Jaakko Kaprio
- Institute for Molecular Medicine FIMM University of Helsinki Helsinki Finland
| | - Urho M. Kujala
- Faculty of Sport and Health Sciences University of Jyväskylä Jyväskylä Finland
| | - Marc Baumann
- Medicum, Biochemistry/Developmental Biology Meilahti Clinical Proteomics Core Facility University of Helsinki Helsinki Finland
| | - Sarianna Sipilä
- Faculty of Sport and Health Sciences Gerontology Research Center University of Jyväskylä Jyväskylä Finland
| | - Vuokko Kovanen
- Faculty of Sport and Health Sciences University of Jyväskylä Jyväskylä Finland
| | - Maciej Lalowski
- Medicum, Biochemistry/Developmental Biology Meilahti Clinical Proteomics Core Facility University of Helsinki Helsinki Finland
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11
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Muscle satellite cells are functionally impaired in myasthenia gravis: consequences on muscle regeneration. Acta Neuropathol 2017; 134:869-888. [PMID: 28756524 DOI: 10.1007/s00401-017-1754-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2017] [Revised: 06/30/2017] [Accepted: 07/21/2017] [Indexed: 12/14/2022]
Abstract
Myasthenia gravis (MG) is a neuromuscular disease caused in most cases by anti-acetyl-choline receptor (AChR) autoantibodies that impair neuromuscular signal transmission and affect skeletal muscle homeostasis. Myogenesis is carried out by muscle stem cells called satellite cells (SCs). However, myogenesis in MG had never been explored. The aim of this study was to characterise the functional properties of myasthenic SCs as well as their abilities in muscle regeneration. SCs were isolated from muscle biopsies of MG patients and age-matched controls. We first showed that the number of Pax7+ SCs was increased in muscle sections from MG and its experimental autoimmune myasthenia gravis (EAMG) mouse model. Myoblasts isolated from MG muscles proliferate and differentiate more actively than myoblasts from control muscles. MyoD and MyoG were expressed at a higher level in MG myoblasts as well as in MG muscle biopsies compared to controls. We found that treatment of control myoblasts with MG sera or monoclonal anti-AChR antibodies increased the differentiation and MyoG mRNA expression compared to control sera. To investigate the functional ability of SCs from MG muscle to regenerate, we induced muscle regeneration using acute cardiotoxin injury in the EAMG mouse model. We observed a delay in maturation evidenced by a decrease in fibre size and MyoG mRNA expression as well as an increase in fibre number and embryonic myosin heavy-chain mRNA expression. These findings demonstrate for the first time the altered function of SCs from MG compared to control muscles. These alterations could be due to the anti-AChR antibodies via the modulation of myogenic markers resulting in muscle regeneration impairment. In conclusion, the autoimmune attack in MG appears to have unsuspected pathogenic effects on SCs and muscle regeneration, with potential consequences on myogenic signalling pathways, and subsequently on clinical outcome, especially in the case of muscle stress.
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12
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Santos-Zas I, Negroni E, Mamchaoui K, Mosteiro CS, Gallego R, Butler-Browne GS, Pazos Y, Mouly V, Camiña JP. Obestatin Increases the Regenerative Capacity of Human Myoblasts Transplanted Intramuscularly in an Immunodeficient Mouse Model. Mol Ther 2017; 25:2345-2359. [PMID: 28750736 DOI: 10.1016/j.ymthe.2017.06.022] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 06/23/2017] [Accepted: 06/24/2017] [Indexed: 02/08/2023] Open
Abstract
Although cell-based therapy is considered a promising method aiming at treating different muscular disorders, little clinical benefit has been reported. One of major hurdles limiting the efficiency of myoblast transfer therapy is the poor survival of the transplanted cells. Any intervention upon the donor cells focused on enhancing in vivo survival, proliferation, and expansion is essential to improve the effectiveness of such therapies in regenerative medicine. In the present work, we investigated the potential role of obestatin, an autocrine peptide factor regulating skeletal muscle growth and repair, to improve the outcome of myoblast-based therapy by xenotransplanting primary human myoblasts into immunodeficient mice. The data proved that short in vivo obestatin treatment of primary human myoblasts not only enhances the efficiency of engraftment, but also facilitates an even distribution of myoblasts in the host muscle. Moreover, this treatment leads to a hypertrophic response of the human-derived regenerating myofibers. Taken together, the activation of the obestatin/GPR39 pathway resulted in an overall improvement of the efficacy of cell engraftment within the host's skeletal muscle. These data suggest considerable potential for future therapeutic applications and highlight the importance of combinatorial therapies.
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Affiliation(s)
- Icia Santos-Zas
- Laboratorio de Endocrinología Celular, Instituto de Investigación Sanitaria de Santiago (IDIS), Complejo Hospitalario Universitario de Santiago (CHUS), Servicio Gallego de Salud (SERGAS), 15706 Santiago de Compostela, Spain
| | - Elisa Negroni
- Sorbonne Universités, Université Pierre et Marie Curie Université Paris 06, INSERM UMRS974, Center for Research in Myology, 47 Boulevard de l'hôpital, 75013 Paris, France
| | - Kamel Mamchaoui
- Sorbonne Universités, Université Pierre et Marie Curie Université Paris 06, INSERM UMRS974, Center for Research in Myology, 47 Boulevard de l'hôpital, 75013 Paris, France
| | - Carlos S Mosteiro
- Laboratorio de Endocrinología Celular, Instituto de Investigación Sanitaria de Santiago (IDIS), Complejo Hospitalario Universitario de Santiago (CHUS), Servicio Gallego de Salud (SERGAS), 15706 Santiago de Compostela, Spain
| | - Rosalia Gallego
- Departamento de Ciencias Morfológicas, Universidad de Santiago de Compostela, 15704 Santiago de Compostela, Spain
| | - Gillian S Butler-Browne
- Sorbonne Universités, Université Pierre et Marie Curie Université Paris 06, INSERM UMRS974, Center for Research in Myology, 47 Boulevard de l'hôpital, 75013 Paris, France
| | - Yolanda Pazos
- Laboratorio de Patología Digestiva, IDIS, CHUS, SERGAS, 15706 Santiago de Compostela, Spain
| | - Vincent Mouly
- Sorbonne Universités, Université Pierre et Marie Curie Université Paris 06, INSERM UMRS974, Center for Research in Myology, 47 Boulevard de l'hôpital, 75013 Paris, France.
| | - Jesus P Camiña
- Laboratorio de Endocrinología Celular, Instituto de Investigación Sanitaria de Santiago (IDIS), Complejo Hospitalario Universitario de Santiago (CHUS), Servicio Gallego de Salud (SERGAS), 15706 Santiago de Compostela, Spain.
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13
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Arandel L, Polay Espinoza M, Matloka M, Bazinet A, De Dea Diniz D, Naouar N, Rau F, Jollet A, Edom-Vovard F, Mamchaoui K, Tarnopolsky M, Puymirat J, Battail C, Boland A, Deleuze JF, Mouly V, Klein AF, Furling D. Immortalized human myotonic dystrophy muscle cell lines to assess therapeutic compounds. Dis Model Mech 2017; 10:487-497. [PMID: 28188264 PMCID: PMC5399563 DOI: 10.1242/dmm.027367] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 02/05/2017] [Indexed: 01/20/2023] Open
Abstract
Myotonic dystrophy type 1 (DM1) and type 2 (DM2) are autosomal dominant neuromuscular diseases caused by microsatellite expansions and belong to the family of RNA-dominant disorders. Availability of cellular models in which the DM mutation is expressed within its natural context is essential to facilitate efforts to identify new therapeutic compounds. Here, we generated immortalized DM1 and DM2 human muscle cell lines that display nuclear RNA aggregates of expanded repeats, a hallmark of myotonic dystrophy. Selected clones of DM1 and DM2 immortalized myoblasts behave as parental primary myoblasts with a reduced fusion capacity of immortalized DM1 myoblasts when compared with control and DM2 cells. Alternative splicing defects were observed in differentiated DM1 muscle cell lines, but not in DM2 lines. Splicing alterations did not result from differentiation delay because similar changes were found in immortalized DM1 transdifferentiated fibroblasts in which myogenic differentiation has been forced by overexpression of MYOD1. As a proof-of-concept, we show that antisense approaches alleviate disease-associated defects, and an RNA-seq analysis confirmed that the vast majority of mis-spliced events in immortalized DM1 muscle cells were affected by antisense treatment, with half of them significantly rescued in treated DM1 cells. Immortalized DM1 muscle cell lines displaying characteristic disease-associated molecular features such as nuclear RNA aggregates and splicing defects can be used as robust readouts for the screening of therapeutic compounds. Therefore, immortalized DM1 and DM2 muscle cell lines represent new models and tools to investigate molecular pathophysiological mechanisms and evaluate the in vitro effects of compounds on RNA toxicity associated with myotonic dystrophy mutations. Summary: Myotonic dystrophy muscle cell models displaying characteristic disease-associated molecular features can be used to investigate molecular pathophysiological mechanisms and evaluate therapeutic approaches.
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Affiliation(s)
- Ludovic Arandel
- Sorbonne Universités UPMC Univ Paris 06, INSERM, CNRS, Centre de Recherche en Myologie, Institut de Myologie, GH Pitié-Salpêtrière, Paris 75013, France
| | - Micaela Polay Espinoza
- Sorbonne Universités UPMC Univ Paris 06, INSERM, CNRS, Centre de Recherche en Myologie, Institut de Myologie, GH Pitié-Salpêtrière, Paris 75013, France
| | - Magdalena Matloka
- Sorbonne Universités UPMC Univ Paris 06, INSERM, CNRS, Centre de Recherche en Myologie, Institut de Myologie, GH Pitié-Salpêtrière, Paris 75013, France
| | - Audrey Bazinet
- Sorbonne Universités UPMC Univ Paris 06, INSERM, CNRS, Centre de Recherche en Myologie, Institut de Myologie, GH Pitié-Salpêtrière, Paris 75013, France
| | - Damily De Dea Diniz
- Sorbonne Universités UPMC Univ Paris 06, INSERM, CNRS, Centre de Recherche en Myologie, Institut de Myologie, GH Pitié-Salpêtrière, Paris 75013, France
| | - Naïra Naouar
- Sorbonne Universités UPMC Univ Paris 06, INSERM, CNRS, Centre de Recherche en Myologie, Institut de Myologie, GH Pitié-Salpêtrière, Paris 75013, France
| | - Frédérique Rau
- Sorbonne Universités UPMC Univ Paris 06, INSERM, CNRS, Centre de Recherche en Myologie, Institut de Myologie, GH Pitié-Salpêtrière, Paris 75013, France
| | - Arnaud Jollet
- Sorbonne Universités UPMC Univ Paris 06, INSERM, CNRS, Centre de Recherche en Myologie, Institut de Myologie, GH Pitié-Salpêtrière, Paris 75013, France
| | - Frédérique Edom-Vovard
- Sorbonne Universités UPMC Univ Paris 06, INSERM, CNRS, Centre de Recherche en Myologie, Institut de Myologie, GH Pitié-Salpêtrière, Paris 75013, France
| | - Kamel Mamchaoui
- Sorbonne Universités UPMC Univ Paris 06, INSERM, CNRS, Centre de Recherche en Myologie, Institut de Myologie, GH Pitié-Salpêtrière, Paris 75013, France
| | - Mark Tarnopolsky
- McMaster University Medical Center, Departments of Pediatrics and Medicine, 1200 Main St W., Hamilton, Ontario, Canada, L8N 3Z5
| | - Jack Puymirat
- CHU de Quebec, site Enfant-Jésus, Université Laval, Québec, Canada G1J 1Z4
| | - Christophe Battail
- Centre National de Génotypage, Institut de Génomique, CEA, 91000 Evry, France
| | - Anne Boland
- Centre National de Génotypage, Institut de Génomique, CEA, 91000 Evry, France
| | | | - Vincent Mouly
- Sorbonne Universités UPMC Univ Paris 06, INSERM, CNRS, Centre de Recherche en Myologie, Institut de Myologie, GH Pitié-Salpêtrière, Paris 75013, France
| | - Arnaud F Klein
- Sorbonne Universités UPMC Univ Paris 06, INSERM, CNRS, Centre de Recherche en Myologie, Institut de Myologie, GH Pitié-Salpêtrière, Paris 75013, France
| | - Denis Furling
- Sorbonne Universités UPMC Univ Paris 06, INSERM, CNRS, Centre de Recherche en Myologie, Institut de Myologie, GH Pitié-Salpêtrière, Paris 75013, France
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14
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Cheng CS, Ran L, Bursac N, Kraus WE, Truskey GA. Cell Density and Joint microRNA-133a and microRNA-696 Inhibition Enhance Differentiation and Contractile Function of Engineered Human Skeletal Muscle Tissues. Tissue Eng Part A 2017; 22:573-83. [PMID: 26891613 DOI: 10.1089/ten.tea.2015.0359] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
To utilize three-dimensional (3D) engineered human skeletal muscle tissue for translational studies and in vitro studies of drug toxicity, there is a need to promote differentiation and functional behavior. In this study, we identified conditions to promote contraction of engineered human skeletal muscle bundles and examined the effects of transient inhibition of microRNAs (miRs) on myogenic differentiation and function of two-dimensional (2D) and 3D cultures of human myotubes. In 2D cultures, simultaneously inhibiting both miR-133a, which promotes myoblast proliferation, and miR-696, which represses oxidative metabolism, resulted in an increase in sarcomeric α-actinin protein and the metabolic coactivator PGC-1α protein compared to transfection with a scrambled miR sequence (negative control). Although PGC-1α was elevated following joint inhibition of miRs 133a and 696, there was no difference in myosin heavy chain (MHC) protein isoforms. 3D engineered human skeletal muscle myobundles seeded with 5 × 10(6) human skeletal myoblasts (HSkM)/mL and cultured for 2 weeks after onset of differentiation consistently did not contract when stimulated electrically, whereas those seeded with myoblasts at 10 × 10(6) HSkM/mL or higher did contract. When HSkM were transfected with both anti-miRs and seeded into fibrin hydrogels and cultured for 2 weeks under static conditions, twitch and tetanic specific forces after electrical stimulation were greater than for myobundles prepared with HSkM transfected with scrambled sequences. Immunofluorescence and Western blots of 3D myobundles indicate that anti-miR-133a or anti-miR-696 treatment led to modest increases in slow MHC, but no consistent increase in fast MHC. Similar to results in 2D, only myobundles prepared with myoblasts treated with anti-miR-133a and anti-miR-696 produced an increase in PGC-1α mRNA. PGC-1α targets were differentially affected by the treatment. HIF-2α mRNA showed an expression pattern similar to that of PGC-1α mRNA, but COXII mRNA levels were not affected by the anti-miRs. Overall, joint inhibition of miR-133a and miR-696 accelerated differentiation, elevated the metabolic coactivator PGC-1α, and increased the contractile force in 3D engineered human skeletal muscle bundles.
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Affiliation(s)
- Cindy S Cheng
- 1 Department of Biomedical Engineering, Duke University , Durham, North Carolina
| | - Lydia Ran
- 1 Department of Biomedical Engineering, Duke University , Durham, North Carolina
| | - Nenad Bursac
- 1 Department of Biomedical Engineering, Duke University , Durham, North Carolina
| | - William E Kraus
- 1 Department of Biomedical Engineering, Duke University , Durham, North Carolina.,2 Department of Medicine, Duke University School of Medicine , Durham, North Carolina
| | - George A Truskey
- 1 Department of Biomedical Engineering, Duke University , Durham, North Carolina
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15
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Dumont NA, Bentzinger CF, Sincennes MC, Rudnicki MA. Satellite Cells and Skeletal Muscle Regeneration. Compr Physiol 2016; 5:1027-59. [PMID: 26140708 DOI: 10.1002/cphy.c140068] [Citation(s) in RCA: 425] [Impact Index Per Article: 53.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Skeletal muscles are essential for vital functions such as movement, postural support, breathing, and thermogenesis. Muscle tissue is largely composed of long, postmitotic multinucleated fibers. The life-long maintenance of muscle tissue is mediated by satellite cells, lying in close proximity to the muscle fibers. Muscle satellite cells are a heterogeneous population with a small subset of muscle stem cells, termed satellite stem cells. Under homeostatic conditions all satellite cells are poised for activation by stimuli such as physical trauma or growth signals. After activation, satellite stem cells undergo symmetric divisions to expand their number or asymmetric divisions to give rise to cohorts of committed satellite cells and thus progenitors. Myogenic progenitors proliferate, and eventually differentiate through fusion with each other or to damaged fibers to reconstitute fiber integrity and function. In the recent years, research has begun to unravel the intrinsic and extrinsic mechanisms controlling satellite cell behavior. Nonetheless, an understanding of the complex cellular and molecular interactions of satellite cells with their dynamic microenvironment remains a major challenge, especially in pathological conditions. The goal of this review is to comprehensively summarize the current knowledge on satellite cell characteristics, functions, and behavior in muscle regeneration and in pathological conditions.
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Affiliation(s)
- Nicolas A Dumont
- Sprott Centre for Stem Cell Research, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - C Florian Bentzinger
- Sprott Centre for Stem Cell Research, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.,Nestlé Institute of Health Sciences, EPFL Campus, Lausanne, Switzerland
| | - Marie-Claude Sincennes
- Sprott Centre for Stem Cell Research, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada
| | - Michael A Rudnicki
- Sprott Centre for Stem Cell Research, Ottawa Hospital Research Institute, Ottawa, Ontario, Canada.,Faculty of Medicine, Department of Cellular and Molecular Medicine, University of Ottawa, Ottawa, Ontario, Canada
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16
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Possidonio ACB, Soares CP, Fontenele M, Morris ER, Mouly V, Costa ML, Mermelstein C. Knockdown of Lmo7 inhibits chick myogenesis. FEBS Lett 2016; 590:317-29. [DOI: 10.1002/1873-3468.12067] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 12/20/2015] [Accepted: 01/05/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Ana C. B. Possidonio
- Laboratório de Diferenciação Muscular e Citoesqueleto; Instituto de Ciências Biomédicas; Universidade Federal do Rio de Janeiro; RJ Brazil
| | - Carolina P. Soares
- Laboratório de Diferenciação Muscular e Citoesqueleto; Instituto de Ciências Biomédicas; Universidade Federal do Rio de Janeiro; RJ Brazil
| | - Marcio Fontenele
- Laboratório de Biologia Molecular do Desenvolvimento; Instituto de Ciências Biomédicas; Universidade Federal do Rio de Janeiro; RJ Brazil
| | - Eduardo R. Morris
- Laboratório de Diferenciação Muscular e Citoesqueleto; Instituto de Ciências Biomédicas; Universidade Federal do Rio de Janeiro; RJ Brazil
| | - Vincent Mouly
- Sorbonne Universités; UPMC Univ Paris 06; INSERM UMRS974; CNRS FRE3617; Center for Research in Myology; Paris France
| | - Manoel L. Costa
- Laboratório de Diferenciação Muscular e Citoesqueleto; Instituto de Ciências Biomédicas; Universidade Federal do Rio de Janeiro; RJ Brazil
| | - Claudia Mermelstein
- Laboratório de Diferenciação Muscular e Citoesqueleto; Instituto de Ciências Biomédicas; Universidade Federal do Rio de Janeiro; RJ Brazil
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17
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Pinto-Mariz F, Rodrigues Carvalho L, Prufer De Queiroz Campos Araujo A, De Mello W, Gonçalves Ribeiro M, Cunha MDCSA, Cabello PH, Riederer I, Negroni E, Desguerre I, Veras M, Yada E, Allenbach Y, Benveniste O, Voit T, Mouly V, Silva-Barbosa SD, Butler-Browne G, Savino W. CD49d is a disease progression biomarker and a potential target for immunotherapy in Duchenne muscular dystrophy. Skelet Muscle 2015; 5:45. [PMID: 26664665 PMCID: PMC4674917 DOI: 10.1186/s13395-015-0066-2] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2015] [Accepted: 11/03/2015] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Duchenne muscular dystrophy (DMD) is caused by mutations in the dystrophin gene. The immune inflammatory response also contributes to disease progression in DMD patients. In a previous study, we demonstrated higher levels of circulating CD49dhi and CD49ehi T cells in DMD patients compared to healthy control. DMD patients are clinically heterogeneous and the functional defect cannot be correlated with genotype. Therefore, it is important to be able to define reliable noninvasive biomarkers to better define the disease progression at the beginning of clinical trials. RESULTS We studied 75 DMD patients at different stages of their disease and observed that increased percentages of circulating CD4(+)CD49d(hi) and CD8(+)CD49d(hi) T lymphocytes were correlated with both severity and a more rapid progression of the disease. Moreover, T(+)CD49d(+) cells were also found in muscular inflammatory infiltrates. Functionally, T cells from severely affected patients exhibited higher transendothelial and fibronectin-driven migratory responses and increased adhesion to myotubes, when compared to control individuals. These responses could be blocked with an anti-CD49d monoclonal antibody. CONCLUSION CD49d can be used as a novel biomarker to stratify DMD patients by predicting disease progression for clinical trials. Moreover, anti-CD49d peptides or antibodies can be used as a therapeutic approach to decrease inflammation-mediated tissue damage in DMD.
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Affiliation(s)
- Fernanda Pinto-Mariz
- Laboratory on Thymus Research, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil ; Institute of Pediatrics, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil ; Sorbonne Universités, UPMC Univ Paris 06, UM76, INSERM U974, CNRS FRE3617, Center for Research in Myology, 47 boulevard de l'Hopital, Paris, 75651 France
| | | | | | - Wallace De Mello
- Laboratory on Thymus Research, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | | | | | | | - Ingo Riederer
- Laboratory on Thymus Research, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Elisa Negroni
- Sorbonne Universités, UPMC Univ Paris 06, UM76, INSERM U974, CNRS FRE3617, Center for Research in Myology, 47 boulevard de l'Hopital, Paris, 75651 France
| | | | - Mariana Veras
- Laboratory on Thymus Research, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
| | - Erica Yada
- Sorbonne Universités, UPMC Univ Paris 06, UM76, INSERM U974, CNRS FRE3617, Center for Research in Myology, 47 boulevard de l'Hopital, Paris, 75651 France
| | - Yves Allenbach
- Service de Médecine Interne 1, Université Pierre et Marie Curie, Paris, France
| | - Olivier Benveniste
- Service de Médecine Interne 1, Université Pierre et Marie Curie, Paris, France
| | - Thomas Voit
- Sorbonne Universités, UPMC Univ Paris 06, UM76, INSERM U974, CNRS FRE3617, Center for Research in Myology, 47 boulevard de l'Hopital, Paris, 75651 France
| | - Vincent Mouly
- Sorbonne Universités, UPMC Univ Paris 06, UM76, INSERM U974, CNRS FRE3617, Center for Research in Myology, 47 boulevard de l'Hopital, Paris, 75651 France
| | - Suse Dayse Silva-Barbosa
- Laboratory on Thymus Research, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil ; Department of Clinical Research, National Cancer Institute (INCA), Rio de Janeiro, Brazil
| | - Gillian Butler-Browne
- Sorbonne Universités, UPMC Univ Paris 06, UM76, INSERM U974, CNRS FRE3617, Center for Research in Myology, 47 boulevard de l'Hopital, Paris, 75651 France
| | - Wilson Savino
- Laboratory on Thymus Research, Oswaldo Cruz Foundation, Rio de Janeiro, Brazil
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Koutalianos D, Koutsoulidou A, Mastroyiannopoulos NP, Furling D, Phylactou LA. MyoD transcription factor induces myogenesis by inhibiting Twist-1 through miR-206. J Cell Sci 2015; 128:3631-45. [PMID: 26272918 DOI: 10.1242/jcs.172288] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Accepted: 08/08/2015] [Indexed: 01/22/2023] Open
Abstract
Twist-1 is mostly expressed during development and has been previously shown to control myogenesis. Because its regulation in muscle has not been fully exploited, the aim of this project was to identify micro (mi)RNAs in muscle that regulate Twist-1. miR-206, one of the most important muscle-specific miRNAs (myomiRs), was identified as a possible regulator of Twist-1 mRNA. Luciferase assays and transfections in human foetal myoblasts showed that Twist-1 is a direct target of miR-206 and that through this pathway muscle cell differentiation is promoted. We next investigated whether MyoD, a major myogenic transcription factor, regulates Twist-1 because it is known that MyoD induces expression of the miR-206 gene. We found that forced MyoD expression induced miR-206 upregulation and Twist-1 downregulation through binding to the miR-206 promoter, followed by increased muscle cell differentiation. Finally, experiments were performed in muscle cells from subjects with congenital myotonic dystrophy type 1, in which myoblasts fail to differentiate into myotubes. MyoD overexpression inhibited Twist-1 through miR-206 induction, which was followed by an increase in muscle cell differentiation. These results reveal a previously unidentified mechanism of myogenesis that might also play an important role in muscle disease.
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Affiliation(s)
- Demetris Koutalianos
- Department of Molecular Genetics, Function & Therapy, Cyprus Institute of Neurology and Genetics, Nicosia,1683, Cyprus
| | - Andrie Koutsoulidou
- Department of Molecular Genetics, Function & Therapy, Cyprus Institute of Neurology and Genetics, Nicosia,1683, Cyprus
| | - Nikilaos P Mastroyiannopoulos
- Department of Molecular Genetics, Function & Therapy, Cyprus Institute of Neurology and Genetics, Nicosia,1683, Cyprus
| | - Denis Furling
- Sorbonne Universités, UPMC Univ Paris 06, Centre de Recherche en Myologie, INSERM UMRS974, CNRS FRE3617, Institut de Myologie, Paris 75013, France
| | - Leonidas A Phylactou
- Department of Molecular Genetics, Function & Therapy, Cyprus Institute of Neurology and Genetics, Nicosia,1683, Cyprus
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Le Bihan MC, Barrio-Hernandez I, Mortensen TP, Henningsen J, Jensen SS, Bigot A, Blagoev B, Butler-Browne G, Kratchmarova I. Cellular Proteome Dynamics during Differentiation of Human Primary Myoblasts. J Proteome Res 2015; 14:3348-61. [DOI: 10.1021/acs.jproteome.5b00397] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Marie-Catherine Le Bihan
- Department
of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense, Denmark
| | - Inigo Barrio-Hernandez
- Department
of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense, Denmark
| | - Tenna Pavia Mortensen
- Department
of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense, Denmark
| | - Jeanette Henningsen
- Department
of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense, Denmark
| | - Søren Skov Jensen
- Department
of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense, Denmark
| | - Anne Bigot
- Center
for Research in Myology, Sorbonne Universités, UPMC Univ Paris 06, INSERM UMRS975, CNRS FRE3617, 75013 Paris, France
| | - Blagoy Blagoev
- Department
of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense, Denmark
| | - Gillian Butler-Browne
- Center
for Research in Myology, Sorbonne Universités, UPMC Univ Paris 06, INSERM UMRS975, CNRS FRE3617, 75013 Paris, France
| | - Irina Kratchmarova
- Department
of Biochemistry and Molecular Biology, University of Southern Denmark, 5230 Odense, Denmark
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20
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Pekkala S, Wiklund P, Hulmi JJ, Pöllänen E, Marjomäki V, Munukka E, Pierre P, Mouly V, Mero A, Alén M, Cheng S. Cannabinoid receptor 1 and acute resistance exercise--In vivo and in vitro studies in human skeletal muscle. Peptides 2015; 67:55-63. [PMID: 25796352 DOI: 10.1016/j.peptides.2015.03.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/24/2015] [Accepted: 03/11/2015] [Indexed: 11/17/2022]
Abstract
AIM This study aimed to determine whether Cannabinoid receptor 1 (CB1) is involved in mammalian target of rapamycin (mTOR) signaling and skeletal muscle protein synthesis. METHODS This study used human vastus lateralis skeletal muscle biopsies obtained before and after a resistance exercise (RE) bout in young men (n=18). The signaling mechanisms were studied in vitro in human myotubes. Protein expression was determined by Western blot and confocal microscopy, and gene expression by quantitative PCR. Protein synthesis was measured in vitro using puromycin-based SuNSET technique. RESULTS In human skeletal muscle, an anabolic stimulus in the form of RE down-regulated CB1 expression. The negative change in CB1 expression was associated with increased phosphorylation of mTOR signaling proteins. In vitro, CB1 antagonist AM251 induced phosphorylation of mTOR downstream targets, ribosomal protein S6 kinase (S6K1), S6 and eukaryotic initiation factor 4E binding protein (4E-BP1) in human myotubes. These effects were ERK1/2-dependent and insensitive to mTOR inhibitor, rapamycin. Compared to AM251 treatment alone, inhibition of ERK1/2 by UO126 in the presence of AM251 decreased phosphorylation of S6K1, S6 and and 4E-BP1 at Thr(37/46). AM251 increased protein synthesis in cultured human myotubes, which was not rapamycin-sensitive but was ERK1/2-dependent. CONCLUSIONS Our results indicate that RE down-regulates CB1 expression. Inhibition of CB1 signaling increases skeletal muscle anabolic signaling down-stream of mTOR and protein synthesis through ERK1/2. Our study may provide base for the development of CB1-blocking drugs to treat or prevent muscle wasting.
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Affiliation(s)
- Satu Pekkala
- Department of Health Sciences, University of Jyväskylä, Jyväskylä, Finland.
| | - Petri Wiklund
- Department of Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Juha J Hulmi
- Department of Biology of Physical Activity, University of Jyväskylä, Jyväskylä, Finland
| | - Eija Pöllänen
- Department of Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Varpu Marjomäki
- Department of Biological and Environmental Sciences/Nanoscience Center, University of Jyväskylä, Jyväskylä, Finland
| | - Eveliina Munukka
- Department of Health Sciences, University of Jyväskylä, Jyväskylä, Finland
| | - Philippe Pierre
- Centre d'Immunologie de Marseille-Luminy, UM2, Aix-Marseille Université, 13288 Marseille, France; INSERM, U1104, 13288 Marseille, France; CNRS, UMR 7280, 13288 Marseille, France
| | - Vincent Mouly
- Thérapie des maladies du muscle strié, Institut de Myologie, UM76-Université Pierre and Marie Curie, Paris, France; INSERM U974, CNRS UMR 7215, G.H. Pitié-Salpétrière, 47 bd de l'hôpital, Paris, France
| | - Antti Mero
- Department of Biology of Physical Activity, University of Jyväskylä, Jyväskylä, Finland
| | - Markku Alén
- Department of Medical Rehabilitation, Oulu University Hospital, and Institute of Health Sciences - University of Oulu, Oulu, Finland
| | - Sulin Cheng
- Department of Health Sciences, University of Jyväskylä, Jyväskylä, Finland; Department of Physical Education, Shanghai Jiao Tong University, Shanghai, China
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21
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Pöllänen E, Kangas R, Horttanainen M, Niskala P, Kaprio J, Butler-Browne G, Mouly V, Sipilä S, Kovanen V. Intramuscular sex steroid hormones are associated with skeletal muscle strength and power in women with different hormonal status. Aging Cell 2015; 14:236-48. [PMID: 25645687 PMCID: PMC4364836 DOI: 10.1111/acel.12309] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/08/2014] [Indexed: 11/30/2022] Open
Abstract
Estrogen (E2)-responsive peripheral tissues, such as skeletal muscle, may suffer from hormone deficiency after menopause potentially contributing to the aging of muscle. However, recently E2 was shown to be synthesized by muscle and its systemic and intramuscular hormone levels are unequal. The objective of the study was to examine the association between intramuscular steroid hormones and muscle characteristics in premenopausal women (n = 8) and in postmenopausal monozygotic twin sister pairs (n = 16 co-twins from eight pairs) discordant for the use of E2-based hormone replacement. Isometric skeletal muscle strength was assessed by measuring knee extension strength. Explosive lower body muscle power was assessed as vertical jump height. Due to sequential nature of enzymatic conversion of biologically inactive dehydroepiandrosterone (DHEA) to testosterone (T) and subsequently to E2 or dihydrotestosterone (DHT), separate linear regression models were used to estimate the association of each hormone with muscle characteristics. Intramuscular E2, T, DHT, and DHEA proved to be significant, independent predictors of strength and power explaining 59–64% of the variation in knee extension strength and 80–83% of the variation of vertical jumping height in women (P < 0.005 for all models). The models were adjusted for age, systemic E2, and total body fat mass. The statistics used took into account the lack of statistical independence of twin sisters. Furthermore, muscle cells were shown to take up and actively synthesize hormones. Present study suggests intramuscular sex steroids to associate with strength and power regulation in female muscle providing novel insight to the field of muscle aging.
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Affiliation(s)
- Eija Pöllänen
- Department of Health Sciences; Gerontology Research Center; University of Jyväskylä; Jyväskylä Finland
| | - Reeta Kangas
- Department of Health Sciences; Gerontology Research Center; University of Jyväskylä; Jyväskylä Finland
| | - Mia Horttanainen
- Department of Health Sciences; Gerontology Research Center; University of Jyväskylä; Jyväskylä Finland
| | - Paula Niskala
- Department of Health Sciences; Gerontology Research Center; University of Jyväskylä; Jyväskylä Finland
| | - Jaakko Kaprio
- Department of Public Health; University of Helsinki; Helsinki Finland
- Institute for Molecular Medicine; University of Helsinki; Helsinki Finland
- National Institute for Health and Welfare; Helsinki Finland
| | - Gillian Butler-Browne
- Myology Research Center; Institut de Myologie; Sorbonne Universités; UPMC University Paris 06; UMR974; INSERM U974; CNRS FRE 3617; F-75013 Paris France
| | - Vincent Mouly
- Myology Research Center; Institut de Myologie; Sorbonne Universités; UPMC University Paris 06; UMR974; INSERM U974; CNRS FRE 3617; F-75013 Paris France
| | - Sarianna Sipilä
- Department of Health Sciences; Gerontology Research Center; University of Jyväskylä; Jyväskylä Finland
| | - Vuokko Kovanen
- Department of Health Sciences; Gerontology Research Center; University of Jyväskylä; Jyväskylä Finland
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22
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Reversal of myoblast aging by tocotrienol rich fraction posttreatment. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2013; 2013:978101. [PMID: 24349615 PMCID: PMC3856141 DOI: 10.1155/2013/978101] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/05/2013] [Revised: 10/17/2013] [Accepted: 10/21/2013] [Indexed: 02/06/2023]
Abstract
Skeletal muscle satellite cells are heavily involved in the regeneration of skeletal muscle in response to the aging-related deterioration of the skeletal muscle mass, strength, and regenerative capacity, termed as sarcopenia. This study focused on the effect of tocotrienol rich fraction (TRF) on regenerative capacity of myoblasts in stress-induced premature senescence (SIPS). The myoblasts was grouped as young control, SIPS-induced, TRF control, TRF pretreatment, and TRF posttreatment. Optimum dose of TRF, morphological observation, activity of senescence-associated β-galactosidase (SA-β-galactosidase), and cell proliferation were determined. 50 μg/mL TRF treatment exhibited the highest cell proliferation capacity. SIPS-induced myoblasts exhibit large flattened cells and prominent intermediate filaments (senescent-like morphology). The activity of SA-β-galactosidase was significantly increased, but the proliferation capacity was significantly reduced as compared to young control. The activity of SA-β-galactosidase was significantly reduced and cell proliferation was significantly increased in the posttreatment group whereas there was no significant difference in SA-β-galactosidase activity and proliferation capacity of pretreatment group as compared to SIPS-induced myoblasts. Based on the data, we hypothesized that TRF may reverse the myoblasts aging through replenishing the regenerative capacity of the cells. However, further investigation on the mechanism of TRF in reversing the myoblast aging is needed.
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23
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Scott IC, Tomlinson W, Walding A, Isherwood B, Dougall IG. Large-scale isolation of human skeletal muscle satellite cells from post-mortem tissue and development of quantitative assays to evaluate modulators of myogenesis. J Cachexia Sarcopenia Muscle 2013; 4:157-69. [PMID: 23344890 PMCID: PMC3684706 DOI: 10.1007/s13539-012-0097-z] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Accepted: 11/25/2012] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND During aging, there is a decreased ability to maintain skeletal muscle mass and function (sarcopenia). Such changes in skeletal muscle are also co-morbidities of diseases including cancer, congestive heart failure and chronic obstructive pulmonary disease. The loss of muscle mass results in decreased strength and exercise tolerance and reduced ability to perform daily activities. Pharmacological agents addressing these pathologies could have significant clinical impact, but their identification requires understanding of mechanisms driving myotube formation (myogenesis) and atrophy and provision of relevant assays. The aim of this study was to develop robust in vitro methods to study human myogenesis. METHODS Satellite cells were isolated by digestion of post-mortem skeletal muscle and selection using anti-CD56 MicroBeads. CD56(+) cell-derived myotubes were quantified by high content imaging of myosin heavy chains. TaqMan-polymerase chain reaction arrays were used to quantify expression of 41 selected genes during differentiation. The effects of activin receptor agonists and tumour necrosis factor alpha (TNFα) on myogenesis and gene expression were characterised. RESULTS Large-scale isolation of CD56(+) cells enabled development of a quantitative myogenesis assay with maximal myotube formation 3 days after initiating differentiation. Gene expression analysis demonstrated expression of 19 genes changed substantially during myogenesis. TNFα and activin receptor agonists inhibited myogenesis and downregulated gene expression of muscle transcription factors, structural components and markers of oxidative phenotype, but only TNFα increased expression of pro-inflammatory markers. CONCLUSIONS We have developed methods for large-scale isolation of satellite cells from muscle and quantitative assays for studying human myogenesis. These systems may prove useful as part of a screening cascade designed to identify therapeutic agents for improving muscle function.
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Affiliation(s)
- Ian C Scott
- Respiratory and Inflammation, Bioscience Department, AstraZeneca R&D Charnwood, Loughborough, UK,
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24
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Vianello S, Yu H, Voisin V, Haddad H, He X, Foutz AS, Sebrié C, Gillet B, Roulot M, Fougerousse F, Perronnet C, Vaillend C, Matecki S, Escolar D, Bossi L, Israël M, de la Porte S. Arginine butyrate: a therapeutic candidate for Duchenne muscular dystrophy. FASEB J 2013; 27:2256-69. [PMID: 23430975 DOI: 10.1096/fj.12-215723] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
As a strategy to treat Duchenne muscular dystrophy, we used arginine butyrate, which combines two pharmacological activities: nitric oxide pathway activation, and histone deacetylase inhibition. Continuous intraperitoneal administration to dystrophin-deficient mdx mice resulted in a near 2-fold increase in utrophin (protein homologous to dystrophin) in skeletal muscle, heart, and brain, accompanied by an improvement of the dystrophic phenotype in both adult and newborn mice (45 and 70% decrease in creatine kinase level, respectively; 14% increase in tidal volume, 30% decrease in necrotic area in limb and 23% increase in isometric force). Intermittent administration, as performed in clinical trials, was then used to reduce the frequency of injections and to improve safety. This also enhanced utrophin level around 2-fold (EC50=284 mg/ml) and alleviated the dystrophic phenotype (inverted grid and grip test performance near to wild-type values, creatine kinase level decreased by 50%). Skin biopsies were used to monitor treatment efficacy, instead of invasive muscle biopsies, and this could be done a few days after the start of treatment. A 2-fold increase in utrophin expression was also shown in cultured human myotubes. In vivo and in vitro experiments demonstrated that the drug combination acts synergistically. Together, these data constitute a proof of principle of the beneficial effects of arginine butyrate on muscular dystrophy.
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Affiliation(s)
- Sara Vianello
- Neurobiologie & Développement-Unité Propres de Recherche 3294, Centre National de la Recherche Scientifique, Institut de Neurobiologie Alfred Fessard-FRC2118, Gif sur Yvette, France
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25
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In-depth analysis of the secretome identifies three major independent secretory pathways in differentiating human myoblasts. J Proteomics 2012; 77:344-56. [DOI: 10.1016/j.jprot.2012.09.008] [Citation(s) in RCA: 99] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Revised: 08/14/2012] [Accepted: 09/08/2012] [Indexed: 01/28/2023]
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26
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Bencze M, Negroni E, Vallese D, Yacoub-Youssef H, Chaouch S, Wolff A, Aamiri A, Di Santo JP, Chazaud B, Butler-Browne G, Savino W, Mouly V, Riederer I. Proinflammatory macrophages enhance the regenerative capacity of human myoblasts by modifying their kinetics of proliferation and differentiation. Mol Ther 2012; 20:2168-79. [PMID: 23070116 DOI: 10.1038/mt.2012.189] [Citation(s) in RCA: 110] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Macrophages have been shown to be essential for muscle repair by delivering trophic cues to growing skeletal muscle precursors and young fibers. Here, we investigated whether human macrophages, either proinflammatory or anti-inflammatory, coinjected with human myoblasts into regenerating muscle of Rag2(-/-) γC(-/-) immunodeficient mice, could modify in vivo the kinetics of proliferation and differentiation of the transplanted human myogenic precursors. Our results clearly show that proinflammatory macrophages improve in vivo the participation of injected myoblasts to host muscle regeneration, extending the window of proliferation, increasing migration, and delaying differentiation. Interestingly, immunostaining of transplanted proinflammatory macrophages at different time points strongly suggests that these cells are able to switch to an anti-inflammatory phenotype in vivo, which then may stimulate differentiation during muscle regeneration. Conceptually, our data provide for the first time in vivo evidence strongly suggesting that proinflammatory macrophages play a supportive role in the regulation of myoblast behavior after transplantation into preinjured muscle, and could thus potentially optimize transplantation of myogenic progenitors in the context of cell therapy.
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27
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Perruchot MH, Ecolan P, Sorensen IL, Oksbjerg N, Lefaucheur L. In vitro characterization of proliferation and differentiation of pig satellite cells. Differentiation 2012; 84:322-9. [PMID: 23023068 DOI: 10.1016/j.diff.2012.08.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2012] [Revised: 05/31/2012] [Accepted: 08/09/2012] [Indexed: 01/21/2023]
Abstract
Skeletal muscle contains various muscle fiber types exhibiting different contractile properties based on the myosin heavy chain (MyHC) isoform profile. Muscle fiber type composition is highly variable and influences growth performance and meat quality, but underlying mechanisms regulating fiber type composition remain poorly understood. The aim of the present work was to develop a model based on muscle satellite cell culture to further investigate the regulation of adult MyHC isoforms expression in pig skeletal muscle. Satellite cells were harvested from the mostly fast-twitch glycolytic longissimus (LM) and predominantly slow-twitch oxidative rhomboideus (RM) muscles of 6-week-old piglets. Satellite cells were allowed to proliferate up to 80% confluence, reached after 7 day of proliferation (D7), and then induced to differentiate. Kinetics of proliferation and differentiation were similar between muscles and more than 95% of the cells were myogenic (desmin positive) at D7 with a fusion index reaching 65 ± 9% after 4 day of differentiation. One-dimensional SDS polyacrylamide gel electrophoresis revealed that satellite cells from both muscles only expressed the embryonic and fetal MyHC isoforms in culture, without any of the adult MyHC isoforms that were expressed in vivo. Interestingly, triiodothyronine (T3) induced de novo expression of adult fast and α-cardiac MyHC in vitro making our culture system a valuable tool to study de novo expression of adult MyHC isoforms and its regulation by intrinsic and/or extrinsic factors.
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Affiliation(s)
- Marie-Hélène Perruchot
- INRA, UMR Physiology, Environnement and Genetics for the Animal and Livestock Systems, Saint-Gilles, France.
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28
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Replicative aging down-regulates the myogenic regulatory factors in human myoblasts. Biol Cell 2012; 100:189-99. [DOI: 10.1042/bc20070085] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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29
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Duijnisveld BJ, Bigot A, Beenakker KGM, Portilho DM, Raz V, van der Heide HJL, Visser CPJ, Chaouch S, Mamchaoui K, Westendorp RGJ, Mouly V, Butler-Browne GS, Nelissen RGHH, Maier AB. Regenerative potential of human muscle stem cells in chronic inflammation. Arthritis Res Ther 2011; 13:R207. [PMID: 22171690 PMCID: PMC3334660 DOI: 10.1186/ar3540] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Revised: 10/13/2011] [Accepted: 12/15/2011] [Indexed: 02/08/2023] Open
Abstract
Introduction Chronic inflammation is a profound systemic modification of the cellular microenvironment which could affect survival, repair and maintenance of muscle stem cells. The aim of this study was to define the role of chronic inflammation on the regenerative potential of satellite cells in human muscle. Methods As a model for chronic inflammation, 11 patients suffering from rheumatoid arthritis (RA) were included together with 16 patients with osteoarthritis (OA) as controls. The mean age of both groups was 64 years, with more females in the RA group compared to the OA group. During elective knee replacement surgery, a muscle biopsy was taken from the distal musculus vastus medialis. Cell populations from four RA and eight OA patients were used for extensive phenotyping because these cell populations showed no spontaneous differentiation and myogenic purity greater than 75% after explantation. Results After mononuclear cell explantation, myogenic purity, viability, proliferation index, number of colonies, myogenic colonies, growth speed, maximum number of population doublings and fusion index were not different between RA and OA patients. Furthermore, the expression of proteins involved in replicative and stress-induced premature senescence and apoptosis, including p16, p21, p53, hTERT and cleaved caspase-3, was not different between RA and OA patients. Mean telomere length was shorter in the RA group compared to the OA group. Conclusions In the present study we found evidence that chronic inflammation in RA does not affect the in vitro regenerative potential of human satellite cells. Identification of mechanisms influencing muscle regeneration by modulation of its microenvironment may, therefore, be more appropriate.
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Affiliation(s)
- Bouke J Duijnisveld
- Department of Orthopaedics, Leiden University Medical Center, PO Box 9600, 2300 RC Leiden, The Netherlands
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Abstract
Mammalian skeletal muscle comprises different fiber types, whose identity is first established during embryonic development by intrinsic myogenic control mechanisms and is later modulated by neural and hormonal factors. The relative proportion of the different fiber types varies strikingly between species, and in humans shows significant variability between individuals. Myosin heavy chain isoforms, whose complete inventory and expression pattern are now available, provide a useful marker for fiber types, both for the four major forms present in trunk and limb muscles and the minor forms present in head and neck muscles. However, muscle fiber diversity involves all functional muscle cell compartments, including membrane excitation, excitation-contraction coupling, contractile machinery, cytoskeleton scaffold, and energy supply systems. Variations within each compartment are limited by the need of matching fiber type properties between different compartments. Nerve activity is a major control mechanism of the fiber type profile, and multiple signaling pathways are implicated in activity-dependent changes of muscle fibers. The characterization of these pathways is raising increasing interest in clinical medicine, given the potentially beneficial effects of muscle fiber type switching in the prevention and treatment of metabolic diseases.
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Affiliation(s)
- Stefano Schiaffino
- Venetian Institute of Molecular Medicine, Department of Biomedical Sciences, University of Padova, Consiglio Nazionale delle Ricerche Institute of Neurosciences, and Department of Human Anatomy and Physiology, University of Padova, Padova, Italy
| | - Carlo Reggiani
- Venetian Institute of Molecular Medicine, Department of Biomedical Sciences, University of Padova, Consiglio Nazionale delle Ricerche Institute of Neurosciences, and Department of Human Anatomy and Physiology, University of Padova, Padova, Italy
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31
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Riederer I, Negroni E, Bencze M, Wolff A, Aamiri A, Di Santo JP, Silva-Barbosa SD, Butler-Browne G, Savino W, Mouly V. Slowing down differentiation of engrafted human myoblasts into immunodeficient mice correlates with increased proliferation and migration. Mol Ther 2011; 20:146-54. [PMID: 21934656 DOI: 10.1038/mt.2011.193] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
We have used a model of xenotransplantation in which human myoblasts were transplanted intramuscularly into immunodeficient Rag2(-/-)γC(-/-) mice, in order to investigate the kinetics of proliferation and differentiation of the transplanted cells. After injection, most of the human myoblasts had already differentiated by day 5. This differentiation correlated with reduction in proliferation and limited migration of the donor cells within the regenerating muscle. These results suggest that the precocious differentiation, already detected at 3 days postinjection, is a limiting factor for both the migration from the injection site and the participation of the donor cells to muscle regeneration. When we stimulated in vivo proliferation of human myoblasts, transplanting them in a serum-containing medium, we observed 5 days post-transplantation a delay of myogenic differentiation and an increase in cell numbers, which colonized a much larger area within the recipient's muscle. Importantly, these myoblasts maintained their ability to differentiate, since we found higher numbers of myofibers seen 1 month postengraftment, as compared to controls. Conceptually, these data suggest that in experimental myoblast transplantation, any intervention upon the donor cells and/or the recipient's microenvironment aimed at enhancing proliferation and migration should be done before differentiation of the implanted cells, e.g., day 3 postengraftment.
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Affiliation(s)
- Ingo Riederer
- Thérapie des maladies du muscle strié/Institut de Myologie UM76, Université Pierre et Marie Curie, INSERM-U974; CNRS-UMR7215, Paris, France
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32
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Rouger K, Larcher T, Dubreil L, Deschamps JY, Le Guiner C, Jouvion G, Delorme B, Lieubeau B, Carlus M, Fornasari B, Theret M, Orlando P, Ledevin M, Zuber C, Leroux I, Deleau S, Guigand L, Testault I, Le Rumeur E, Fiszman M, Chérel Y. Systemic delivery of allogenic muscle stem cells induces long-term muscle repair and clinical efficacy in duchenne muscular dystrophy dogs. THE AMERICAN JOURNAL OF PATHOLOGY 2011; 179:2501-18. [PMID: 21924229 DOI: 10.1016/j.ajpath.2011.07.022] [Citation(s) in RCA: 66] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/04/2011] [Revised: 07/13/2011] [Accepted: 07/19/2011] [Indexed: 11/18/2022]
Abstract
Duchenne muscular dystrophy (DMD) is a genetic progressive muscle disease resulting from the lack of dystrophin and without effective treatment. Adult stem cell populations have given new impetus to cell-based therapy of neuromuscular diseases. One of them, muscle-derived stem cells, isolated based on delayed adhesion properties, contributes to injured muscle repair. However, these data were collected in dystrophic mice that exhibit a relatively mild tissue phenotype and clinical features of DMD patients. Here, we characterized canine delayed adherent stem cells and investigated the efficacy of their systemic delivery in the clinically relevant DMD animal model to assess potential therapeutic application in humans. Delayed adherent stem cells, named MuStem cells (muscle stem cells), were isolated from healthy dog muscle using a preplating technique. In vitro, MuStem cells displayed a large expansion capacity, an ability to proliferate in suspension, and a multilineage differentiation potential. Phenotypically, they corresponded to early myogenic progenitors and uncommitted cells. When injected in immunosuppressed dystrophic dogs, they contributed to myofiber regeneration, satellite cell replenishment, and dystrophin expression. Importantly, their systemic delivery resulted in long-term dystrophin expression, muscle damage course limitation with an increased regeneration activity and an interstitial expansion restriction, and persisting stabilization of the dog's clinical status. These results demonstrate that MuStem cells could provide an attractive therapeutic avenue for DMD patients.
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Affiliation(s)
- Karl Rouger
- INRA, UMR 703 Développement et Pathologie du Tissu Musculaire, Nantes, France.
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33
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Pradat PF, Barani A, Wanschitz J, Dubourg O, Lombès A, Bigot A, Mouly V, Bruneteau G, Salachas F, Lenglet T, Meininger V, Butler-Browne G. Abnormalities of satellite cells function in amyotrophic lateral sclerosis. ACTA ACUST UNITED AC 2011; 12:264-71. [PMID: 21473708 DOI: 10.3109/17482968.2011.566618] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Abstract Amyotrophic lateral sclerosis (ALS) is characterized by progressive denervation leading to muscle atrophy prevented, during the early phase, by compensatory reinnervation. Little is known about muscle fibre regeneration capacity in ALS. We have carried out in vivo and in vitro investigation of skeletal muscle in ALS. Seven ALS patients underwent a deltoid muscle biopsy. Immunohistochemical analysis revealed various degrees of denervation- and reinnervation-related changes in the ALS muscle biopsies including satellite cells (SCs) activation and regenerating fibres. Only 3/7 primary cultures of ALS muscle cells were successfully established and had sufficient myogenicity, as assessed by desmin positivity, to be used without further purification. This was in contrast with the cultures derived from control muscles, predominantly desmin-positive cells. Although capable to proliferate in vitro, ALS-derived SCs presented an abnormal senescent-like morphology. Markers of senescence, including senescent-associated (SA)-βGal activity and p16 expression, were increased. Furthermore, ALS-derived SCs were also unable to fully differentiate in vitro as shown by abnormal myotubes morphology and reduced MHC isoform expression, compared to control myotubes. Our study suggests that SC function is altered in ALS. This could limit the efficacy of compensatory processes and therefore could contribute to the progression of muscle atrophy and weakness.
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Affiliation(s)
- Pierre-François Pradat
- Assistance Publique Hôpitaux de Paris, Département des Maladies du Système Nerveux, Centre de référence maladies rares SLA, Hôpital Pitié-Salpêtrière, France.
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34
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Kandalla PK, Goldspink G, Butler-Browne G, Mouly V. Mechano Growth Factor E peptide (MGF-E), derived from an isoform of IGF-1, activates human muscle progenitor cells and induces an increase in their fusion potential at different ages. Mech Ageing Dev 2011; 132:154-62. [DOI: 10.1016/j.mad.2011.02.007] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2010] [Revised: 02/08/2011] [Accepted: 02/15/2011] [Indexed: 11/28/2022]
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35
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Tran H, Gourrier N, Lemercier-Neuillet C, Dhaenens CM, Vautrin A, Fernandez-Gomez FJ, Arandel L, Carpentier C, Obriot H, Eddarkaoui S, Delattre L, Van Brussels E, Holt I, Morris GE, Sablonnière B, Buée L, Charlet-Berguerand N, Schraen-Maschke S, Furling D, Behm-Ansmant I, Branlant C, Caillet-Boudin ML, Sergeant N. Analysis of exonic regions involved in nuclear localization, splicing activity, and dimerization of Muscleblind-like-1 isoforms. J Biol Chem 2011; 286:16435-46. [PMID: 21454535 DOI: 10.1074/jbc.m110.194928] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Muscleblind-like-1 (MBNL1) is a splicing regulatory factor controlling the fetal-to-adult alternative splicing transitions during vertebrate muscle development. Its capture by nuclear CUG expansions is one major cause for type 1 myotonic dystrophy (DM1). Alternative splicing produces MBNL1 isoforms that differ by the presence or absence of the exonic regions 3, 5, and 7. To understand better their respective roles and the consequences of the deregulation of their expression in DM1, here we studied the respective roles of MBNL1 alternative and constitutive exons. By combining genetics, molecular and cellular approaches, we found that (i) the exon 5 and 6 regions are both needed to control the nuclear localization of MBNL1; (ii) the exon 3 region strongly enhances the affinity of MBNL1 for its pre-mRNA target sites; (iii) the exon 3 and 6 regions are both required for the splicing regulatory activity, and this function is not enhanced by an exclusive nuclear localization of MBNL1; and finally (iv) the exon 7 region enhances MBNL1-MBNL1 dimerization properties. Consequently, the abnormally high inclusion of the exon 5 and 7 regions in DM1 is expected to enhance the potential of MBNL1 of being sequestered with nuclear CUG expansions, which provides new insight into DM1 pathophysiology.
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Affiliation(s)
- Hélène Tran
- INSERM, U837, Alzheimer and Tauopathies, Lille, France
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36
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Stockholm D, Edom-Vovard F, Coutant S, Sanatine P, Yamagata Y, Corre G, Le Guillou L, Neildez-Nguyen TMA, Pàldi A. Bistable cell fate specification as a result of stochastic fluctuations and collective spatial cell behaviour. PLoS One 2010; 5:e14441. [PMID: 21203432 PMCID: PMC3010982 DOI: 10.1371/journal.pone.0014441] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2010] [Accepted: 11/30/2010] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND In culture, isogenic mammalian cells typically display enduring phenotypic heterogeneity that arises from fluctuations of gene expression and other intracellular processes. This diversity is not just simple noise but has biological relevance by generating plasticity. Noise driven plasticity was suggested to be a stem cell-specific feature. RESULTS Here we show that the phenotypes of proliferating tissue progenitor cells such as primary mononuclear muscle cells can also spontaneously fluctuate between different states characterized by the either high or low expression of the muscle-specific cell surface molecule CD56 and by the corresponding high or low capacity to form myotubes. Although this capacity is a cell-intrinsic property, the cells switch their phenotype under the constraints imposed by the highly heterogeneous microenvironment created by their own collective movement. The resulting heterogeneous cell population is characterized by a dynamic equilibrium between "high CD56" and "low CD56" phenotype cells with distinct spatial distribution. Computer simulations reveal that this complex dynamic is consistent with a context-dependent noise driven bistable model where local microenvironment acts on the cellular state by encouraging the cell to fluctuate between the phenotypes until the low noise state is found. CONCLUSIONS These observations suggest that phenotypic fluctuations may be a general feature of any non-terminally differentiated cell. The cellular microenvironment created by the cells themselves contributes actively and continuously to the generation of fluctuations depending on their phenotype. As a result, the cell phenotype is determined by the joint action of the cell-intrinsic fluctuations and by collective cell-to-cell interactions.
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Affiliation(s)
| | | | - Sophie Coutant
- Généthon, Evry, France
- INSERM U951, Université Evry Val d'Essonne, Evry, France
- UMR951, Ecole Pratique des Hautes Etudes, Evry, France
| | | | - Yoshiaki Yamagata
- Généthon, Evry, France
- INSERM U951, Université Evry Val d'Essonne, Evry, France
- UMR951, Ecole Pratique des Hautes Etudes, Evry, France
| | - Guillaume Corre
- Généthon, Evry, France
- INSERM U951, Université Evry Val d'Essonne, Evry, France
- UMR951, Ecole Pratique des Hautes Etudes, Evry, France
| | - Laurent Le Guillou
- LPNHE - Université Paris 6, Bureau 412 - Tour 43 RdC, Campus de Jussieu, Paris, France
| | - Thi My Anh Neildez-Nguyen
- Généthon, Evry, France
- INSERM U951, Université Evry Val d'Essonne, Evry, France
- UMR951, Ecole Pratique des Hautes Etudes, Evry, France
| | - Andràs Pàldi
- Généthon, Evry, France
- INSERM U951, Université Evry Val d'Essonne, Evry, France
- UMR951, Ecole Pratique des Hautes Etudes, Evry, France
- * E-mail:
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37
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Chen D, Chen S, Wang W, Liu F, Zhang C, Zheng H. Modulation of satellite cells in rat facial muscle following denervation and delayed reinnervation. Acta Otolaryngol 2010; 130:1411-20. [PMID: 20632902 DOI: 10.3109/00016489.2010.496464] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONCLUSION Long-term denervation-induced satellite cells (SCs) deficiency impairs facial muscle regenerative capacity. Delayed reinnervation can reactivate residual SCs to engage in muscle regeneration. However, the underlying mechanism remains to be elucidated. OBJECTIVE To evaluate the effects of denervation and delayed reinnervation on SCs in facial muscle. METHODS This was a prospective, randomized, controlled study in the rat facial nerve ligation and delayed decompression model. Animals were divided into denervation, 8-week-delay, and 16-week-delay reinnervation groups. Sham-operated animals served as a control group. Specific markers were used to investigate the differences in SC status, including quiescent (Pax7) and activated (myoD and myogenin) SCs and regenerative myofibers (embryonic myosin heavy chain, eMyHC). Quantitative assessment was performed by real-time PCR and Western blotting. RESULTS Activated SCs were detected 2-4 weeks after denervation and maintained for 4-8 weeks, accompanied by regenerating myofibers, whereas no SCs were detected beyond 20 weeks post-denervation. The myoD and myogenin up-regulation peaked 6-8 weeks after denervation and declined gradually to normal baseline 12 weeks after denervation. The 8-week-delay reinnervation group showed more activated SCs and regenerating myofibers than the 16-week-delay group, as well as greater up-regulation of myoD and myogenin (p < 0.05), suggesting reactivation of SCs for repair of adjacent fibers.
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Affiliation(s)
- Donghui Chen
- Department of Otorhinolaryngology-Head & Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai, China
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38
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Biressi S, Rando TA. Heterogeneity in the muscle satellite cell population. Semin Cell Dev Biol 2010; 21:845-54. [PMID: 20849971 DOI: 10.1016/j.semcdb.2010.09.003] [Citation(s) in RCA: 111] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2010] [Revised: 08/11/2010] [Accepted: 09/06/2010] [Indexed: 02/07/2023]
Abstract
Satellite cells, the adult stem cells responsible for skeletal muscle regeneration, are defined by their location between the basal lamina and the fiber sarcolemma. Increasing evidence suggests that satellite cells represent a heterogeneous population of cells with distinct embryological origin and multiple levels of biochemical and functional diversity. This review focuses on the rich diversity of the satellite cell population based on studies across species. Ultimately, a more complete characterization of the heterogeneity of satellite cells will be essential to understand the functional significance in terms of muscle growth, homeostasis, tissue repair, and aging.
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Affiliation(s)
- Stefano Biressi
- Department of Neurology and Neurological Sciences, Stanford University, School of Medicine, Stanford, CA 94305-5235, USA
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39
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Abstract
Adult muscle is extremely plastic. However, the muscle precursor cells associated with those fibres show stable and heritable differences in gene expression indicative of epigenetic imprinting. Epigenetic processes in the development of skeletal muscle have been appreciated for over a decade; however, there are a paucity of studies looking at whether epigenetics determines the phenotype of adult and/or ageing skeletal muscle. This review presents the evidence that epigenetics plays a role in determining adult muscle function and a series of unanswered questions that would greatly increase our understanding of how epigenetics works in adult muscle. With the increased interest in epigenetics, over the next few years this field will begin to unfold in unimaginable directions.
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Affiliation(s)
- K Baar
- Department of Neurobiology, Physiology, and Behavior, University of California, Davis, CA 95616, USA.
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40
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Wein N, Avril A, Bartoli M, Beley C, Chaouch S, Laforêt P, Behin A, Butler-Browne G, Mouly V, Krahn M, Garcia L, Lévy N. Efficient bypass of mutations in dysferlin deficient patient cells by antisense-induced exon skipping. Hum Mutat 2010; 31:136-42. [PMID: 19953532 DOI: 10.1002/humu.21160] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Mutations in DYSF encoding dysferlin cause primary dysferlinopathies, autosomal recessive diseases that mainly present clinically as Limb Girdle Muscular Dystrophy type 2B and Miyoshi myopathy. More than 350 different sequence variants have been reported in DYSF. Like dystrophin, the size of the dysferlin mRNA is above the limited packaging size of AAV vectors. Alternative strategies to AAV gene transfer in muscle cells must then be addressed for patients. A gene therapy approach for Duchenne muscular dystrophy was recently developed, based on exon-skipping strategy. Numerous sequences are recognized by splicing protein complexes and, when specifically blocked by antisense oligoucleotides (AON), the corresponding exon is skipped. We hypothesized that this approach could be useful for patients affected with dysferlinopathies. To confirm this assumption, exon 32 was selected as a prioritary target for exon skipping strategy. This option was initially driven by the report from Sinnreich and colleagues of a patient with a very mild and late-onset phenotype associated to a natural skipping of exon 32. Three different antisense oligonucleotides were tested in myoblasts generated from control and patient MyoD transduced fibroblasts, either as oligonucleotides or after incorporation into lentiviral vectors. These approaches led to a high efficiency of exon 32 skipping. Therefore, these results seem promising, and could be applied to several other exons in the DYSF gene. Patients carrying mutations in exons whose the in-frame suppression has been proven to have no major consequences on the protein function, might benefit of exon-skipping based gene correction.
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Affiliation(s)
- Nicolas Wein
- Université de la Méditerranée, Inserm UMR_S 910 Génétique Médicale et Génomique Fonctionnelle, Faculté de Médecine de Marseille, France
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41
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In vivo myogenic potential of human CD133+ muscle-derived stem cells: a quantitative study. Mol Ther 2009; 17:1771-8. [PMID: 19623164 DOI: 10.1038/mt.2009.167] [Citation(s) in RCA: 102] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
In recent years, numerous reports have identified in mouse different sources of myogenic cells distinct from satellite cells that exhibited a variable myogenic potential in vivo. Myogenic stem cells have also been described in humans, although their regenerative potential has rarely been quantified. In this study, we have investigated the myogenic potential of human muscle-derived cells based on the expression of the stem cell marker CD133 as compared to bona fide satellite cells already used in clinical trials. The efficiency of these cells to participate in muscle regeneration and contribute to the renewal of the satellite cell pool, when injected intramuscularly, has been evaluated in the Rag2(-/-) gammaC(-/-) C5(-/-) mouse in which muscle degeneration is induced by cryoinjury. We demonstrate that human muscle-derived CD133+ cells showed a much greater regenerative capacity when compared to human myoblasts. The number of fibers expressing human proteins and the number of human cells in a satellite cell position are all dramatically increased when compared to those observed after injection of human myoblasts. In addition, CD133+/CD34+ cells exhibited a better dispersion in the host muscle when compared to human myoblasts. We propose that muscle-derived CD133+ cells could be an attractive candidate for cellular therapy.
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42
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Pietrangelo T, Puglielli C, Mancinelli R, Beccafico S, Fanò G, Fulle S. Molecular basis of the myogenic profile of aged human skeletal muscle satellite cells during differentiation. Exp Gerontol 2009; 44:523-31. [PMID: 19457451 DOI: 10.1016/j.exger.2009.05.002] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2009] [Revised: 03/31/2009] [Accepted: 05/13/2009] [Indexed: 12/25/2022]
Abstract
Sarcopenia is the age-related loss of muscle mass, strength and function. Human muscle proteins are synthesized at a slower rate in the elderly than in young adults, leading to atrophy and muscle mass loss with a decline in the functional capability. Additionally, aging is accompanied by a decrease in the ability of muscle tissue to regenerate following injury or overuse due to the impairment of intervening satellite cells, in which we previously reported oxidative damage evidences. The aim of the present study was to determine the effects of aging on myoblasts and myotubes obtained from human skeletal muscle, and characterize the transcriptional profile as molecular expression patterns in relation to age-dependent modifications in their regenerative capacity. Our data show that the failure to differentiate does not depend on reduced myogenic cell number, but difficulty to complete the differentiation program. Data reported here suggested the following findings: (i) oxidative damage accumulation in molecular substrates, probably due to impaired antioxidant activity and insufficient repair capability, (ii) limited capability of elderly myoblasts to execute a complete differentiation program; restricted fusion, possibly due to altered cytoskeleton turnover and extracellular matrix degradation and (iii) activation of atrophy mechanism by activation of a specific FOXO-dependent program.
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Affiliation(s)
- Tiziana Pietrangelo
- BAMS - Dip. Scienze Mediche di Base ed Applicate, Centro Studi Invecchiamento, Istituto Interuniversitario di Miologia, Università G. d'Annunzio, Via dei Vestini 29, Chieti-Pescara, Italy
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43
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β-hydroxy-β-methylbutyrate (HMB) stimulates myogenic cell proliferation, differentiation and survival via the MAPK/ERK and PI3K/Akt pathways. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2009; 1793:755-63. [DOI: 10.1016/j.bbamcr.2008.12.017] [Citation(s) in RCA: 123] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/23/2008] [Revised: 12/18/2008] [Accepted: 12/22/2008] [Indexed: 11/18/2022]
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44
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Bello NF, Lamsoul I, Heuzé ML, Métais A, Moreaux G, Calderwood DA, Duprez D, Moog-Lutz C, Lutz PG. The E3 ubiquitin ligase specificity subunit ASB2beta is a novel regulator of muscle differentiation that targets filamin B to proteasomal degradation. Cell Death Differ 2009; 16:921-32. [PMID: 19300455 DOI: 10.1038/cdd.2009.27] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Ubiquitin-mediated protein degradation is the main mechanism for controlled proteolysis, which is crucial for muscle development and maintenance. The ankyrin repeat-containing protein with a suppressor of cytokine signaling box 2 gene (ASB2) encodes the specificity subunit of an E3 ubiquitin ligase complex involved in differentiation of hematopoietic cells. Here, we provide the first evidence that a novel ASB2 isoform, ASB2beta, is important for muscle differentiation. ASB2beta is expressed in muscle cells during embryogenesis and in adult tissues. ASB2beta is part of an active E3 ubiquitin ligase complex and targets the actin-binding protein filamin B (FLNb) for proteasomal degradation. Thus, ASB2beta regulates FLNb functions by controlling its degradation. Knockdown of endogenous ASB2beta by shRNAs during induced differentiation of C2C12 cells delayed FLNb degradation as well as myoblast fusion and expression of muscle contractile proteins. Finally, knockdown of FLNb in ASB2beta knockdown cells restores myogenic differentiation. Altogether, our results suggest that ASB2beta is involved in muscle differentiation through the targeting of FLNb to destruction by the proteasome.
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Affiliation(s)
- N F Bello
- Institut de Pharmacologie et de Biologie Structurale, CNRS, Toulouse, France
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45
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Lourenço S, Boni S, Furling D, Cosset FL, Cahour A. A cell-based bicistronic lentiviral reporter system for identification of inhibitors of the hepatitis C virus internal ribosome entry site. J Virol Methods 2009; 158:152-9. [PMID: 19428584 DOI: 10.1016/j.jviromet.2009.02.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2008] [Revised: 01/27/2009] [Accepted: 02/05/2009] [Indexed: 01/25/2023]
Abstract
This report describes the development, optimization and implementation of a persistent cell-based system to test inhibitors of hepatitis C (HCV) translation. The assay is based on a heterologous human immunodeficiency virus-1/simian immunodeficiency virus (HIV-1/SIV) lentiviral vector expressing the bicistronic cassette containing the firefly and renilla luciferase genes, respectively, as reporters, and the HCV internal ribosome entry site (IRES) inserted in between, under the control of the cytomegalovirus (CMV) promoter. The drug target in this assay is the HCV IRES, the activity of which leads to modulation of the renilla luciferase gene expression under its control, which is monitored by luminometry. The system has been validated using interferon (IFN), which is still the only consensual antiviral agent against HCV infection, associated with ribavirin. This bicistronic vector, extended to other viral IRESs and assayed in different cell lines, exhibited weak cell tropism, allowing its broad use in gene therapy, which frequently needs a multicistronic transfer vector to follow the expression of a gene of interest inside the target cells with the aid of a reporter, a drug selection marker, or a suicide gene, expressed from the same transcript.
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Affiliation(s)
- Sofia Lourenço
- Laboratoire de Virologie, CERVI, Unité Propre de Recherche et d'Enseignement Supérieur de l'UPMC, Université Paris 6 EA 2387, IFR 113, Groupe Hospitalier Pitié-Salpêtrière, Paris Cedex 13, France
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46
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Nurowska E, Constanti A, Dworakowska B, Mouly V, Furling D, Lorenzon P, Pietrangelo T, Dołowy K, Ruzzier F. Potassium currents in human myogenic cells from healthy and congenital myotonic dystrophy foetuses. Cell Mol Biol Lett 2009; 14:336-46. [PMID: 19194665 PMCID: PMC6275736 DOI: 10.2478/s11658-009-0006-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2008] [Accepted: 01/23/2009] [Indexed: 11/25/2022] Open
Abstract
The whole-cell patch clamp technique was used to record potassium currents in in vitro differentiating myoblasts isolated from healthy and myotonic dystrophy type 1 (DM1) foetuses carrying 2000 CTG repeats. The fusion of the DM1 myoblasts was reduced in comparison to that of the control cells. The dystrophic muscle cells expressed less voltage-activated K(+) (delayed rectifier and non-inactivating delayed rectifier) and inward rectifier channels than the age-matched control cells. However, the resting membrane potential was not significantly different between the control and the DM1 cells. After four days in a differentiation medium, the dystrophic cells expressed the fast-inactivating transient outward K(+) channels, which were not observed in healthy cells. We suggest that the low level of potassium currents measured in differentiated DM1 cells could be related to their impaired fusion.
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Affiliation(s)
- Ewa Nurowska
- Department of Biophysics, Warsaw University of Life Sciences SGGW, Warsaw, Poland,
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Barop J, Sauer H, Steger K, Wimmer M. Differentiation-dependent PTPIP51 expression in human skeletal muscle cell culture. J Histochem Cytochem 2009; 57:425-35. [PMID: 19124842 DOI: 10.1369/jhc.2008.952846] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Protein tyrosine phosphatase-interacting protein 51 (PTPIP51) expression was analyzed in proliferating and differentiating human myogenic cells cultured in vitro. Satellite cell cultures derived from four different individuals were used in this study. To analyze the expression of PTPIP51, myoblasts were cultured under conditions promoting either proliferation or differentiation. In addition, further differentiation of already-differentiated myobtubes was inhibited by resubmitting the cells to conditions promoting proliferation. PTPIP51 protein and mRNA were investigated in samples taken at defined time intervals by immunostaining, immunoblotting, in situ hybridization, and PCR. Image analyses of fluorescence immunostainings were used to quantify PTPIP51 in cultured myoblasts and myotubes. Myoblasts grown in the presence of epidermal and fibroblast growth factors (EGF and FGF), both promoting proliferation, expressed PTPIP51 on a basic level. Differentiation to multinuclear myotubes displayed a linear increase in PTPIP51 expression. The rise in PTPIP51 protein was paralleled by an augmented expression of muscle-specific proteins, namely, sarcoplasmic reticulum Ca(2+) ATPase and myosin heavy-chain protein, both linked to a progressive state of myotubal differentiation. This differentiation-induced increase in PTPIP51 was partly reversible by resubmission of differentiated myotubes to conditions boosting proliferation. The results clearly point toward a strong association between PTPIP51 expression and differentiation in human muscle cells.
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Affiliation(s)
- Justus Barop
- Institute of Anatomy and Cell Biology, Justus-Liebig University, 35385 Giessen, Germany.
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Alpha v beta 3 and alpha v beta 5 integrins and their role in muscle precursor cell adhesion. Biol Cell 2008; 100:465-77. [PMID: 18282143 DOI: 10.1042/bc20070115] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND INFORMATION Functional adaptation of skeletal muscle is a requirement for different muscle groups (e.g. craniofacial, ocular and limb) to undergo site-specific changes. Such tissue remodelling depends on dynamic interactions between muscle cells and their extracellular matrix, via participation of multifunctional molecules such as integrins. In view of data suggesting a role in fundamental muscle biology and muscle development in other systems, the present study has focused on expression and function of alpha v integrins, in cultured adult human craniofacial muscle (masseter) precursor cells and myotubes, and the predominantly fibroblastic IC (interstitial cells) population. RESULTS AND CONCLUSIONS Flow-cytometric phenotyping and immunofluorescence phenotyping show that alpha v, alpha v beta 3 and alpha v beta 5 are expressed in all mononuclear cells (muscle precursors and IC) seeded on muscle extracellular molecules such as gelatin, VN (vitronectin) and FN (fibronectin). In this system, blockade of alpha v activity using a function-perturbing antibody abrogates cell migration on VN and FN. alpha v integrins act predominantly as VN receptors as cell-substrate attachment is diminished when alpha v neutralizing agents are introduced into cultures seeded on VN, and this inhibition is reversible; these integrins also appear to be minor FN receptors. These results demonstrate that the alpha v subset of integrins present on both myogenic precursors and IC is an essential cohort of VN and, to a lesser extent, FN receptors mediating cell adhesion and, either directly or indirectly, arbiters of cell motility.
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Riederer I, Negroni E, Bigot A, Bencze M, Di Santo J, Aamiri A, Butler-Browne G, Mouly V. Heat shock treatment increases engraftment of transplanted human myoblasts into immunodeficient mice. Transplant Proc 2008; 40:624-30. [PMID: 18374147 DOI: 10.1016/j.transproceed.2008.01.026] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Myoblast transfer therapy (MTT) is a strategy that has been proposed to treat some striated muscle pathologies. However, the first therapeutic trials using this technique were unsuccessful due to the limited migration and early cell death of the injected myoblasts. Various strategies have been considered to increase myoblast survival in the host muscle after MTT. Overexpression of heat shock proteins (HSPs) in mouse myoblasts has been shown to improve cell resistance against apoptosis in vitro and in vivo. Our objective was to determine whether heat shock (HS) treatment increased the survival of human myoblasts leading to better participation of the injected cells in muscle regeneration. For this study, HS-treated human myoblasts were injected into the tibialis anterior (TA) muscles of immunodeficient RAG-/- gammaC-/- mice. TA muscles were excised at 24 hour and at 1 month after injection. Our results showed that HS treatment increased the expression of the hsp70 protein and protected the cells from apoptosis in vitro. HS treatment dramatically increased the number of human fibers present at 1 month after injection when compared with nontreated cells. Interestingly, HS treatment decreased apoptosis at 24 hour after human myoblast injection, but no differences were observed concerning proliferation, suggesting that the increased fiber formation among the HS-treated group was probably due to decreased cell death. These data suggested that HS treatment might be used in the clinical context to improve the success of MTT.
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Affiliation(s)
- I Riederer
- UMR S 787, Institut de Myologie, INSERM & Université Pierre et Marie Curie, Paris, France
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