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Paget TL, Larcombe AN, Pinniger GJ, Tsioutsias I, Schneider JP, Parkinson-Lawrence EJ, Orgeig S. Mucopolysaccharidosis (MPS IIIA) mice have increased lung compliance and airway resistance, decreased diaphragm strength, and no change in alveolar structure. Am J Physiol Lung Cell Mol Physiol 2024; 326:L713-L726. [PMID: 38469649 DOI: 10.1152/ajplung.00445.2022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2023] [Revised: 12/18/2023] [Accepted: 01/18/2024] [Indexed: 03/13/2024] Open
Abstract
Mucopolysaccharidosis type IIIA (MPS IIIA) is characterized by neurological and skeletal pathologies caused by reduced activity of the lysosomal hydrolase, sulfamidase, and the subsequent primary accumulation of undegraded heparan sulfate (HS). Respiratory pathology is considered secondary in MPS IIIA and the mechanisms are not well understood. Changes in the amount, metabolism, and function of pulmonary surfactant, the substance that regulates alveolar interfacial surface tension and modulates lung compliance and elastance, have been reported in MPS IIIA mice. Here we investigated changes in lung function in 20-wk-old control and MPS IIIA mice with a closed and open thoracic cage, diaphragm contractile properties, and potential parenchymal remodeling. MPS IIIA mice had increased compliance and airway resistance and reduced tissue damping and elastance compared with control mice. The chest wall impacted lung function as observed by an increase in airway resistance and a decrease in peripheral energy dissipation in the open compared with the closed thoracic cage state in MPS IIIA mice. Diaphragm contractile forces showed a decrease in peak twitch force, maximum specific force, and the force-frequency relationship but no change in muscle fiber cross-sectional area in MPS IIIA mice compared with control mice. Design-based stereology did not reveal any parenchymal remodeling or destruction of alveolar septa in the MPS IIIA mouse lung. In conclusion, the increased storage of HS which leads to biochemical and biophysical changes in pulmonary surfactant also affects lung and diaphragm function, but has no impact on lung or diaphragm structure at this stage of the disease.NEW & NOTEWORTHY Heparan sulfate storage in the lungs of mucopolysaccharidosis type IIIA (MPS IIIA) mice leads to changes in lung function consistent with those of an obstructive lung disease and includes an increase in lung compliance and airway resistance and a decrease in tissue elastance. In addition, diaphragm muscle contractile strength is reduced, potentially further contributing to lung function impairment. However, no changes in parenchymal lung structure were observed in mice at 20 wk of age.
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Affiliation(s)
- Tamara L Paget
- Mechanisms in Cell Biology and Diseases Research Concentration, Clinical & Health Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - Alexander N Larcombe
- Respiratory Environmental Health, Wal-yan Respiratory Research Centre, Telethon Kids Institute, Perth, Western Australia, Australia
- Occupation, Environment & Safety, School of Population Health, Curtin University, Perth, Western Australia, Australia
| | - Gavin J Pinniger
- School of Human Sciences, The University of Western Australia, Crawley, Western Australia, Australia
| | - Irene Tsioutsias
- School of Human Sciences, The University of Western Australia, Crawley, Western Australia, Australia
| | - Jan Philipp Schneider
- Hannover Medical School, Institute of Functional and Applied Anatomy, Hannover, Germany
- Biomedical Research in Endstage and Obstructive Lung Disease Hannover (BREATH), Member of the German Center for Lung Research (DZL), Hannover Medical School, Hannover, Germany
| | - Emma J Parkinson-Lawrence
- Mechanisms in Cell Biology and Diseases Research Concentration, Clinical & Health Sciences, University of South Australia, Adelaide, South Australia, Australia
| | - Sandra Orgeig
- Mechanisms in Cell Biology and Diseases Research Concentration, Clinical & Health Sciences, University of South Australia, Adelaide, South Australia, Australia
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2
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Sarcoplasmic Reticulum Ca 2+ Buffer Proteins: A Focus on the Yet-To-Be-Explored Role of Sarcalumenin in Skeletal Muscle Health and Disease. Cells 2023; 12:cells12050715. [PMID: 36899851 PMCID: PMC10000884 DOI: 10.3390/cells12050715] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 02/16/2023] [Accepted: 02/22/2023] [Indexed: 03/06/2023] Open
Abstract
Sarcalumenin (SAR) is a luminal Ca2+ buffer protein with high capacity but low affinity for calcium binding found predominantly in the longitudinal sarcoplasmic reticulum (SR) of fast- and slow-twitch skeletal muscles and the heart. Together with other luminal Ca2+ buffer proteins, SAR plays a critical role in modulation of Ca2+ uptake and Ca2+ release during excitation-contraction coupling in muscle fibers. SAR appears to be important in a wide range of other physiological functions, such as Sarco-Endoplasmic Reticulum Calcium ATPase (SERCA) stabilization, Store-Operated-Calcium-Entry (SOCE) mechanisms, muscle fatigue resistance and muscle development. The function and structural features of SAR are very similar to those of calsequestrin (CSQ), the most abundant and well-characterized Ca2+ buffer protein of junctional SR. Despite the structural and functional similarity, very few targeted studies are available in the literature. The present review provides an overview of the role of SAR in skeletal muscle physiology, as well as of its possible involvement and dysfunction in muscle wasting disorders, in order to summarize the current knowledge on SAR and drive attention to this important but still underinvestigated/neglected protein.
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3
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Vera CD, Zhang A, Pang PD, Wu JC. Treating Duchenne Muscular Dystrophy: The Promise of Stem Cells, Artificial Intelligence, and Multi-Omics. Front Cardiovasc Med 2022; 9:851491. [PMID: 35360042 PMCID: PMC8960141 DOI: 10.3389/fcvm.2022.851491] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2022] [Accepted: 01/31/2022] [Indexed: 01/20/2023] Open
Abstract
Muscular dystrophies are chronic and debilitating disorders caused by progressive muscle wasting. Duchenne muscular dystrophy (DMD) is the most common type. DMD is a well-characterized genetic disorder caused by the absence of dystrophin. Although some therapies exist to treat the symptoms and there are ongoing efforts to correct the underlying molecular defect, patients with muscular dystrophies would greatly benefit from new therapies that target the specific pathways contributing directly to the muscle disorders. Three new advances are poised to change the landscape of therapies for muscular dystrophies such as DMD. First, the advent of human induced pluripotent stem cells (iPSCs) allows researchers to design effective treatment strategies that make up for the gaps missed by conventional “one size fits all” strategies. By characterizing tissue alterations with single-cell resolution and having molecular profiles for therapeutic treatments for a variety of cell types, clinical researchers can design multi-pronged interventions to not just delay degenerative processes, but regenerate healthy tissues. Second, artificial intelligence (AI) will play a significant role in developing future therapies by allowing the aggregation and synthesis of large and disparate datasets to help reveal underlying molecular mechanisms. Third, disease models using a high volume of multi-omics data gathered from diverse sources carry valuable information about converging and diverging pathways. Using these new tools, the results of previous and emerging studies will catalyze precision medicine-based drug development that can tackle devastating disorders such as DMD.
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Affiliation(s)
- Carlos D. Vera
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA, United States
| | - Angela Zhang
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA, United States
| | - Paul D. Pang
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA, United States
| | - Joseph C. Wu
- Stanford Cardiovascular Institute, Stanford University, Stanford, CA, United States
- Division of Cardiovascular Medicine, Department of Medicine, Stanford University, Stanford, CA, United States
- *Correspondence: Joseph C. Wu
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4
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Hrach HC, O'Brien S, Steber HS, Newbern J, Rawls A, Mangone M. Transcriptome changes during the initiation and progression of Duchenne muscular dystrophy in Caenorhabditis elegans. Hum Mol Genet 2021; 29:1607-1623. [PMID: 32227114 PMCID: PMC7322572 DOI: 10.1093/hmg/ddaa055] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 02/17/2020] [Accepted: 03/23/2020] [Indexed: 12/21/2022] Open
Abstract
Duchenne muscular dystrophy (DMD) is a lethal, X-linked disease characterized by progressive muscle degeneration. The condition is driven by nonsense and missense mutations in the dystrophin gene, leading to instability of the sarcolemma and skeletal muscle necrosis and atrophy. Resulting changes in muscle-specific gene expression that take place in dystrophin's absence remain largely uncharacterized, as they are potentially obscured by the chronic inflammation elicited by muscle damage in humans. Caenorhabditis elegans possess a mild inflammatory response that is not active in the muscle, and lack a satellite cell equivalent. This allows for the characterization of the transcriptome rearrangements affecting disease progression independently of inflammation and regeneration. In effort to better understand these dynamics, we have isolated and sequenced body muscle-specific transcriptomes from C. elegans lacking functional dystrophin at distinct stages of disease progression. We have identified an upregulation of genes involved in mitochondrial function early in disease progression, and an upregulation of genes related to muscle repair in later stages. Our results suggest that in C. elegans, dystrophin may have a signaling role early in development, and its absence may activate compensatory mechanisms that counteract muscle degradation caused by loss of dystrophin. We have also developed a temperature-based screening method for synthetic paralysis that can be used to rapidly identify genetic partners of dystrophin. Our results allow for the comprehensive identification of transcriptome changes that potentially serve as independent drivers of disease progression and may in turn allow for the identification of new therapeutic targets for the treatment of DMD.
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Affiliation(s)
- Heather C Hrach
- Molecular and Cellular Biology Graduate Program, School of Life Sciences, 427 East Tyler Mall, Tempe, AZ 85287 4501, USA.,Virginia G. Piper Center for Personalized Diagnostics, The Biodesign Institute at Arizona State University, 1001 S McAllister Ave, Tempe, AZ 85281, USA
| | - Shannon O'Brien
- Virginia G. Piper Center for Personalized Diagnostics, The Biodesign Institute at Arizona State University, 1001 S McAllister Ave, Tempe, AZ 85281, USA.,Barrett Honors College, Arizona State University, 751 E Lemon Mall, Tempe, AZ 85281, USA
| | - Hannah S Steber
- Barrett Honors College, Arizona State University, 751 E Lemon Mall, Tempe, AZ 85281, USA
| | - Jason Newbern
- School of Life Sciences, 427 East Tyler Mall, Tempe, AZ 85287 4501, USA
| | - Alan Rawls
- School of Life Sciences, 427 East Tyler Mall, Tempe, AZ 85287 4501, USA
| | - Marco Mangone
- Virginia G. Piper Center for Personalized Diagnostics, The Biodesign Institute at Arizona State University, 1001 S McAllister Ave, Tempe, AZ 85281, USA
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5
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Coenen-Stass AML, Sork H, Gatto S, Godfrey C, Bhomra A, Krjutškov K, Hart JR, Westholm JO, O'Donovan L, Roos A, Lochmüller H, Puri PL, El Andaloussi S, Wood MJA, Roberts TC. Comprehensive RNA-Sequencing Analysis in Serum and Muscle Reveals Novel Small RNA Signatures with Biomarker Potential for DMD. MOLECULAR THERAPY-NUCLEIC ACIDS 2018; 13:1-15. [PMID: 30219269 PMCID: PMC6140421 DOI: 10.1016/j.omtn.2018.08.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/18/2017] [Revised: 08/13/2018] [Accepted: 08/13/2018] [Indexed: 01/03/2023]
Abstract
Extracellular small RNAs (sRNAs), including microRNAs (miRNAs), are promising biomarkers for diseases such as Duchenne muscular dystrophy (DMD), although their biological relevance is largely unknown. To investigate the relationship between intracellular and extracellular sRNA levels on a global scale, we performed sRNA sequencing in four muscle types and serum from wild-type, dystrophic mdx, and mdx mice in which dystrophin protein expression was restored by exon skipping. Differentially abundant sRNAs were identified in serum (mapping to miRNA, small nuclear RNA [snRNA], and PIWI-interacting RNA [piRNA] loci). One novel candidate biomarker, miR-483, was increased in both mdx serum and muscle, and also elevated in DMD patient sera. Dystrophin restoration induced global shifts in miRNA (including miR-483) and snRNA-fragment abundance toward wild-type levels. Specific serum piRNA-like sRNAs also responded to exon skipping therapy. Absolute miRNA expression in muscle was positively correlated with abundance in the circulation, although multiple highly expressed miRNAs in muscle were not elevated in mdx serum, suggesting that both passive and selective release mechanisms contribute to serum miRNA levels. In conclusion, this study has revealed new insights into the sRNA biology of dystrophin deficiency and identified novel DMD biomarkers.
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Affiliation(s)
- Anna M L Coenen-Stass
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford OX1 3QX, UK
| | - Helena Sork
- Department of Laboratory Medicine, Karolinska Institutet, Huddinge 141 86, Sweden
| | - Sole Gatto
- Development, Aging and Regeneration Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA
| | - Caroline Godfrey
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford OX1 3QX, UK
| | - Amarjit Bhomra
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford OX1 3QX, UK
| | - Kaarel Krjutškov
- Department of Biosciences and Nutrition, Center for Innovative Medicine, Karolinska Institutet, Huddinge 141 83, Sweden; Competence Centre on Health Technologies, Tartu 50410, Estonia
| | - Jonathan R Hart
- Department of Molecular and Experimental Medicine, The Scripps Research Institute, 10550 N. Torrey Pines Road, La Jolla, CA 92037, USA
| | - Jakub O Westholm
- Science for Life Laboratory, Department of Biochemistry and Biophysics, Stockholm University, 17121 Solna, Sweden
| | - Liz O'Donovan
- Medical Research Council, Laboratory of Molecular Biology, Francis Crick Avenue, Cambridge CB2 0QH, UK
| | - Andreas Roos
- The John Walton Muscular Dystrophy Research Centre, MRC Centre for Neuromuscular Diseases, Institute of Genetic Medicine, Newcastle University, Central Parkway, Newcastle upon Tyne NE1 3BZ, UK; Biomedical Research Department, Leibniz-Institute für Analytische Wissenschaften-ISAS-e.V., Otto-Hahn-Strasse 6b, 44227 Dortmund, Germany
| | - Hanns Lochmüller
- The John Walton Muscular Dystrophy Research Centre, MRC Centre for Neuromuscular Diseases, Institute of Genetic Medicine, Newcastle University, Central Parkway, Newcastle upon Tyne NE1 3BZ, UK; Department of Neuropediatrics and Muscle Disorders, Medical Center-University of Freiburg, Faculty of Medicine, Freiburg, Germany; Centro Nacional de Análisis Genómico (CNAG-CRG), Center for Genomic Regulation, Barcelona Institute of Science and Technology (BIST), Barcelona, Spain
| | - Pier Lorenzo Puri
- Development, Aging and Regeneration Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA; IRCCS Fondazione Santa Lucia, Rome, Italy
| | - Samir El Andaloussi
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford OX1 3QX, UK; Department of Laboratory Medicine, Karolinska Institutet, Huddinge 141 86, Sweden
| | - Matthew J A Wood
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford OX1 3QX, UK.
| | - Thomas C Roberts
- Department of Physiology, Anatomy and Genetics, University of Oxford, South Parks Road, Oxford OX1 3QX, UK; Development, Aging and Regeneration Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA 92037, USA.
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6
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Melouane A, Ghanemi A, Aubé S, Yoshioka M, St-Amand J. Differential gene expression analysis in ageing muscle and drug discovery perspectives. Ageing Res Rev 2018; 41:53-63. [PMID: 29102726 DOI: 10.1016/j.arr.2017.10.006] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 10/31/2017] [Accepted: 10/31/2017] [Indexed: 12/12/2022]
Abstract
Identifying therapeutic target genes represents the key step in functional genomics-based therapies. Within this context, the disease heterogeneity, the exogenous factors and the complexity of genomic structure and function represent important challenges. The functional genomics aims to overcome such obstacles via identifying the gene functions and therefore highlight disease-causing genes as therapeutic targets. Genomic technologies promise to reshape the research on ageing muscle, exercise response and drug discovery. Herein, we describe the functional genomics strategies, mainly differential gene expression methods microarray, serial analysis of gene expression (SAGE), massively parallel signature sequence (MPSS), RNA sequencing (RNA seq), representational difference analysis (RDA), and suppression subtractive hybridization (SSH). Furthermore, we review these illustrative approaches that have been used to discover new therapeutic targets for some complex diseases along with the application of these tools to study the modulation of the skeletal muscle transcriptome.
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7
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Quattrocelli M, Capote J, Ohiri JC, Warner JL, Vo AH, Earley JU, Hadhazy M, Demonbreun AR, Spencer MJ, McNally EM. Genetic modifiers of muscular dystrophy act on sarcolemmal resealing and recovery from injury. PLoS Genet 2017; 13:e1007070. [PMID: 29065150 PMCID: PMC5669489 DOI: 10.1371/journal.pgen.1007070] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Revised: 11/03/2017] [Accepted: 10/11/2017] [Indexed: 12/17/2022] Open
Abstract
Genetic disruption of the dystrophin complex produces muscular dystrophy characterized by a fragile muscle plasma membrane leading to excessive muscle degeneration. Two genetic modifiers of Duchenne Muscular Dystrophy implicate the transforming growth factor β (TGFβ) pathway, osteopontin encoded by the SPP1 gene and latent TGFβ binding protein 4 (LTBP4). We now evaluated the functional effect of these modifiers in the context of muscle injury and repair to elucidate their mechanisms of action. We found that excess osteopontin exacerbated sarcolemmal injury, and correspondingly, that loss of osteopontin reduced injury extent both in isolated myofibers and in muscle in vivo. We found that ablation of osteopontin was associated with reduced expression of TGFβ and TGFβ-associated pathways. We identified that increased TGFβ resulted in reduced expression of Anxa1 and Anxa6, genes encoding key components of the muscle sarcolemma resealing process. Genetic manipulation of Ltbp4 in dystrophic muscle also directly modulated sarcolemmal resealing, and Ltbp4 alleles acted in concert with Anxa6, a distinct modifier of muscular dystrophy. These data provide a model in which a feed forward loop of TGFβ and osteopontin directly impacts the capacity of muscle to recover from injury, and identifies an intersection of genetic modifiers on muscular dystrophy.
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MESH Headings
- Animals
- Annexin A1/genetics
- Annexin A1/metabolism
- Annexin A6/genetics
- Annexin A6/metabolism
- Female
- Gene Expression Regulation
- Genes, Modifier
- Latent TGF-beta Binding Proteins/physiology
- Male
- Mice
- Mice, Inbred DBA
- Mice, Knockout
- Muscle, Skeletal/injuries
- Muscle, Skeletal/physiology
- Muscular Dystrophy, Animal/genetics
- Muscular Dystrophy, Animal/metabolism
- Muscular Dystrophy, Animal/pathology
- Osteopontin/genetics
- Osteopontin/metabolism
- Receptors, Transforming Growth Factor beta/genetics
- Receptors, Transforming Growth Factor beta/metabolism
- Recovery of Function
- Sarcolemma/physiology
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Affiliation(s)
- Mattia Quattrocelli
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
| | - Joanna Capote
- Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
| | - Joyce C. Ohiri
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
| | - James L. Warner
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
| | - Andy H. Vo
- Committee on Development, Regeneration, and Stem Cell Biology, The University of Chicago, Chicago, Illinois, United States of America
| | - Judy U. Earley
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
| | - Michele Hadhazy
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
| | - Alexis R. Demonbreun
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
| | - Melissa J. Spencer
- Department of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
| | - Elizabeth M. McNally
- Center for Genetic Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America
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8
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Lardenois A, Jagot S, Lagarrigue M, Guével B, Ledevin M, Larcher T, Dubreil L, Pineau C, Rouger K, Guével L. Quantitative proteome profiling of dystrophic dog skeletal muscle reveals a stabilized muscular architecture and protection against oxidative stress after systemic delivery of MuStem cells. Proteomics 2017; 16:2028-42. [PMID: 27246553 DOI: 10.1002/pmic.201600002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2016] [Revised: 05/02/2016] [Accepted: 05/30/2016] [Indexed: 12/23/2022]
Abstract
Proteomic profiling plays a decisive role in the elucidation of molecular signatures representative of a specific clinical context. MuStem cell based therapy represents a promising approach for clinical applications to cure Duchenne muscular dystrophy (DMD). To expand our previous studies collected in the clinically relevant DMD animal model, we decided to investigate the skeletal muscle proteome 4 months after systemic delivery of allogenic MuStem cells. Quantitative proteomics with isotope-coded protein labeling was used to compile quantitative changes in the protein expression profiles of muscle in transplanted Golden Retriever muscular dystrophy (GRMD) dogs as compared to Golden Retriever muscular dystrophy dogs. A total of 492 proteins were quantified, including 25 that were overrepresented and 46 that were underrepresented after MuStem cell transplantation. Interestingly, this study demonstrates that somatic stem cell therapy impacts on the structural integrity of the muscle fascicle by acting on fibers and its connections with the extracellular matrix. We also show that cell infusion promotes protective mechanisms against oxidative stress and favors the initial phase of muscle repair. This study allows us to identify putative candidates for tissue markers that might be of great value in objectively exploring the clinical benefits resulting from our cell-based therapy for DMD. All MS data have been deposited in the ProteomeXchange with identifier PXD001768 (http://proteomecentral.proteomexchange.org/dataset/PXD001768).
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Affiliation(s)
- Aurélie Lardenois
- INRA, UMR703 PAnTher, Nantes, France.,LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l'alimentation Nantes-Atlantique, Nantes, France
| | - Sabrina Jagot
- INRA, UMR703 PAnTher, Nantes, France.,LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l'alimentation Nantes-Atlantique, Nantes, France.,Université de Nantes, Nantes, France
| | - Mélanie Lagarrigue
- Protim, Irset Inserm UMR 1085, Campus de Beaulieu, Rennes, France.,Université de Rennes I, Campus de Beaulieu, Rennes, France
| | - Blandine Guével
- Protim, Irset Inserm UMR 1085, Campus de Beaulieu, Rennes, France.,Université de Rennes I, Campus de Beaulieu, Rennes, France
| | - Mireille Ledevin
- INRA, UMR703 PAnTher, Nantes, France.,LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l'alimentation Nantes-Atlantique, Nantes, France
| | - Thibaut Larcher
- INRA, UMR703 PAnTher, Nantes, France.,LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l'alimentation Nantes-Atlantique, Nantes, France
| | - Laurence Dubreil
- INRA, UMR703 PAnTher, Nantes, France.,LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l'alimentation Nantes-Atlantique, Nantes, France
| | - Charles Pineau
- Protim, Irset Inserm UMR 1085, Campus de Beaulieu, Rennes, France.,Université de Rennes I, Campus de Beaulieu, Rennes, France
| | - Karl Rouger
- INRA, UMR703 PAnTher, Nantes, France.,LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l'alimentation Nantes-Atlantique, Nantes, France
| | - Laëtitia Guével
- INRA, UMR703 PAnTher, Nantes, France.,LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l'alimentation Nantes-Atlantique, Nantes, France.,Université de Nantes, Nantes, France
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9
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Guiraud S, Edwards B, Squire SE, Babbs A, Shah N, Berg A, Chen H, Davies KE. Identification of serum protein biomarkers for utrophin based DMD therapy. Sci Rep 2017; 7:43697. [PMID: 28252048 PMCID: PMC5333102 DOI: 10.1038/srep43697] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2016] [Accepted: 01/30/2017] [Indexed: 12/18/2022] Open
Abstract
Despite promising therapeutic avenues, there is currently no effective treatment for Duchenne muscular dystrophy (DMD), a lethal monogenic disorder caused by the loss of the large cytoskeletal protein, dystrophin. A highly promising approach to therapy, applicable to all DMD patients irrespective to their genetic defect, is to modulate utrophin, a functional paralogue of dystrophin, able to compensate for the primary defects of DMD restoring sarcolemmal stability. One of the major difficulties in assessing the effectiveness of therapeutic strategies is to define appropriate outcome measures. In the present study, we utilised an aptamer based proteomics approach to profile 1,310 proteins in plasma of wild-type, mdx and Fiona (mdx overexpressing utrophin) mice. Comparison of the C57 and mdx sera revealed 83 proteins with statistically significant >2 fold changes in dystrophic serum abundance. A large majority of previously described biomarkers (ANP32B, THBS4, CAMK2A/B/D, CYCS, CAPNI) were normalised towards wild-type levels in Fiona animals. This work also identified potential mdx markers specific to increased utrophin (DUS3, TPI1) and highlights novel mdx biomarkers (GITR, MYBPC1, HSP60, SIRT2, SMAD3, CNTN1). We define a panel of putative protein mdx biomarkers to evaluate utrophin based strategies which may help to accelerate their translation to the clinic.
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Affiliation(s)
- Simon Guiraud
- Medical Research Council Functional Genomics Unit at the University of Oxford, Department of Physiology, Anatomy and Genetics, Oxford, OX1 3PT, United Kingdom
| | - Benjamin Edwards
- Medical Research Council Functional Genomics Unit at the University of Oxford, Department of Physiology, Anatomy and Genetics, Oxford, OX1 3PT, United Kingdom
| | - Sarah E Squire
- Medical Research Council Functional Genomics Unit at the University of Oxford, Department of Physiology, Anatomy and Genetics, Oxford, OX1 3PT, United Kingdom
| | - Arran Babbs
- Medical Research Council Functional Genomics Unit at the University of Oxford, Department of Physiology, Anatomy and Genetics, Oxford, OX1 3PT, United Kingdom
| | - Nandini Shah
- Medical Research Council Functional Genomics Unit at the University of Oxford, Department of Physiology, Anatomy and Genetics, Oxford, OX1 3PT, United Kingdom
| | - Adam Berg
- Medical Research Council Functional Genomics Unit at the University of Oxford, Department of Physiology, Anatomy and Genetics, Oxford, OX1 3PT, United Kingdom
| | - Huijia Chen
- Medical Research Council Functional Genomics Unit at the University of Oxford, Department of Physiology, Anatomy and Genetics, Oxford, OX1 3PT, United Kingdom
| | - Kay E Davies
- Medical Research Council Functional Genomics Unit at the University of Oxford, Department of Physiology, Anatomy and Genetics, Oxford, OX1 3PT, United Kingdom
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10
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Quattrocelli M, Spencer MJ, McNally EM. Outside in: The matrix as a modifier of muscular dystrophy. BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2017; 1864:572-579. [PMID: 28011285 PMCID: PMC5262521 DOI: 10.1016/j.bbamcr.2016.12.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Revised: 12/14/2016] [Accepted: 12/19/2016] [Indexed: 02/07/2023]
Abstract
Muscular dystrophies are genetic conditions leading to muscle degeneration and often, impaired regeneration. Duchenne Muscular Dystrophy is a prototypical form of muscular dystrophy, and like other forms of genetically inherited muscle diseases, pathological progression is variable. Variability in muscular dystrophy can arise from differences in the manner in which the primary mutation impacts the affected protein's function; however, clinical heterogeneity also derives from secondary mutations in other genes that can enhance or reduce pathogenic features of disease. These genes, called genetic modifiers, regulate the pathophysiological context of dystrophic degeneration and regeneration. Understanding the mechanistic links between genetic modifiers and dystrophic progression sheds light on pathologic remodeling, and provides novel avenues to therapeutically intervene to reduce muscle degeneration. Based on targeted genetic approaches and unbiased genomewide screens, several modifiers have been identified for muscular dystrophy, including extracellular agonists of signaling cascades. This review will focus on identification and possible mechanisms of recently identified modifiers for muscular dystrophy, including osteopontin, latent TGFβ binding protein 4 (LTBP4) and Jagged1. Moreover, we will review the investigational approaches that aim to target modifier pathways and thereby counteract dystrophic muscle wasting.
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Affiliation(s)
| | - Melissa J Spencer
- Dept of Neurology, David Geffen School of Medicine at UCLA, Los Angeles, CA, USA
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Almeida CF, Martins PC, Vainzof M. Comparative transcriptome analysis of muscular dystrophy models Large(myd), Dmd(mdx)/Large(myd) and Dmd(mdx): what makes them different? Eur J Hum Genet 2016; 24:1301-9. [PMID: 26932192 DOI: 10.1038/ejhg.2016.16] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2015] [Revised: 01/26/2016] [Accepted: 02/01/2016] [Indexed: 11/09/2022] Open
Abstract
Muscular dystrophies (MD) are a clinically and genetically heterogeneous group of Mendelian diseases. The underlying pathophysiology and phenotypic variability in each form are much more complex, suggesting the involvement of many other genes. Thus, here we studied the whole genome expression profile in muscles from three mice models for MD, at different time points: Dmd(mdx) (mutation in dystrophin gene), Large(myd-/-) (mutation in Large) and Dmd(mdx)/Large(myd-/-) (both mutations). The identification of altered biological functions can contribute to understand diseases and to find prognostic biomarkers and points for therapeutic intervention. We identified a substantial number of differentially expressed genes (DEGs) in each model, reflecting diseases' complexity. The main biological process affected in the three strains was immune system, accounting for the majority of enriched functional categories, followed by degeneration/regeneration and extracellular matrix remodeling processes. The most notable differences were in 21-day-old Dmd(mdx), with a high proportion of DEGs related to its regenerative capacity. A higher number of positive embryonic myosin heavy chain (eMyHC) fibers confirmed this. The new Dmd(mdx)/Large(myd-/-) model did not show a highly different transcriptome from the parental lineages, with a profile closer to Large(myd-/-), but not bearing the same regenerative potential as Dmd(mdx). This is the first report about transcriptome profile of a mouse model for congenital MD and Dmd(mdx)/Large(myd). By comparing the studied profiles, we conclude that alterations in biological functions due to the dystrophic process are very similar, and that the intense regeneration in Dmd(mdx) involves a large number of activated genes, not differentially expressed in the other two strains.
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Affiliation(s)
- Camila F Almeida
- Laboratory of Muscle Proteins and Comparative Histopathology, Human Genome and Stem Cell Research Center, Department of Genetics and Evolutionary Biology, Biosciences Institute, University of São Paulo, São Paulo, Brazil
| | - Poliana Cm Martins
- Laboratory of Muscle Proteins and Comparative Histopathology, Human Genome and Stem Cell Research Center, Department of Genetics and Evolutionary Biology, Biosciences Institute, University of São Paulo, São Paulo, Brazil
| | - Mariz Vainzof
- Laboratory of Muscle Proteins and Comparative Histopathology, Human Genome and Stem Cell Research Center, Department of Genetics and Evolutionary Biology, Biosciences Institute, University of São Paulo, São Paulo, Brazil
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Breitkreuz M, Hamdani N. A change of heart: oxidative stress in governing muscle function? Biophys Rev 2015; 7:321-341. [PMID: 28510229 DOI: 10.1007/s12551-015-0175-5] [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: 05/05/2015] [Accepted: 06/08/2015] [Indexed: 02/07/2023] Open
Abstract
Redox/cysteine modification of proteins that regulate calcium cycling can affect contraction in striated muscles. Understanding the nature of these modifications would present the possibility of enhancing cardiac function through reversible cysteine modification of proteins, with potential therapeutic value in heart failure with diastolic dysfunction. Both heart failure and muscular dystrophy are characterized by abnormal redox balance and nitrosative stress. Recent evidence supports the synergistic role of oxidative stress and inflammation in the progression of heart failure with preserved ejection fraction, in concert with endothelial dysfunction and impaired nitric oxide-cyclic guanosine monophosphate-protein kinase G signalling via modification of the giant protein titin. Although antioxidant therapeutics in heart failure with diastolic dysfunction have no marked beneficial effects on the outcome of patients, it, however, remains critical to the understanding of the complex interactions of oxidative/nitrosative stress with pro-inflammatory mechanisms, metabolic dysfunction, and the redox modification of proteins characteristic of heart failure. These may highlight novel approaches to therapeutic strategies for heart failure with diastolic dysfunction. In this review, we provide an overview of oxidative stress and its effects on pathophysiological pathways. We describe the molecular mechanisms driving oxidative modification of proteins and subsequent effects on contractile function, and, finally, we discuss potential therapeutic opportunities for heart failure with diastolic dysfunction.
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Affiliation(s)
- Martin Breitkreuz
- Department of Cardiovascular Physiology, Ruhr University Bochum, MA 3/56, 44780, Bochum, Germany
| | - Nazha Hamdani
- Department of Cardiovascular Physiology, Ruhr University Bochum, MA 3/56, 44780, Bochum, Germany.
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Robriquet F, Lardenois A, Babarit C, Larcher T, Dubreil L, Leroux I, Zuber C, Ledevin M, Deschamps JY, Fromes Y, Cherel Y, Guevel L, Rouger K. Differential Gene Expression Profiling of Dystrophic Dog Muscle after MuStem Cell Transplantation. PLoS One 2015; 10:e0123336. [PMID: 25955839 PMCID: PMC4425432 DOI: 10.1371/journal.pone.0123336] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2014] [Accepted: 03/02/2015] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND Several adult stem cell populations exhibit myogenic regenerative potential, thus representing attractive candidates for therapeutic approaches of neuromuscular diseases such as Duchenne Muscular Dystrophy (DMD). We have recently shown that systemic delivery of MuStem cells, skeletal muscle-resident stem cells isolated in healthy dog, generates the remodelling of muscle tissue and gives rise to striking clinical benefits in Golden Retriever Muscular Dystrophy (GRMD) dog. This global effect, which is observed in the clinically relevant DMD animal model, leads us to question here the molecular pathways that are impacted by MuStem cell transplantation. To address this issue, we compare the global gene expression profile between healthy, GRMD and MuStem cell treated GRMD dog muscle, four months after allogenic MuStem cell transplantation. RESULTS In the dystrophic context of the GRMD dog, disease-related deregulation is observed in the case of 282 genes related to various processes such as inflammatory response, regeneration, calcium ion binding, extracellular matrix organization, metabolism and apoptosis regulation. Importantly, we reveal the impact of MuStem cell transplantation on several molecular and cellular pathways based on a selection of 31 genes displaying signals specifically modulated by the treatment. Concomitant with a diffuse dystrophin expression, a histological remodelling and a stabilization of GRMD dog clinical status, we show that cell delivery is associated with an up-regulation of genes reflecting a sustained enhancement of muscle regeneration. We also identify a decreased mRNA expression of a set of genes having metabolic functions associated with lipid homeostasis and energy. Interestingly, ubiquitin-mediated protein degradation is highly enhanced in GRMD dog muscle after systemic delivery of MuStem cells. CONCLUSIONS Overall, our results provide the first high-throughput characterization of GRMD dog muscle and throw new light on the complex molecular/cellular effects associated with muscle repair and the clinical efficacy of MuStem cell-based therapy.
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Affiliation(s)
- Florence Robriquet
- INRA, UMR703 PAnTher, Nantes, France
- LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l’alimentation Nantes-Atlantique, Nantes, France
- Université de Nantes, Nantes, France
| | - Aurélie Lardenois
- INRA, UMR703 PAnTher, Nantes, France
- LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l’alimentation Nantes-Atlantique, Nantes, France
| | - Candice Babarit
- INRA, UMR703 PAnTher, Nantes, France
- LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l’alimentation Nantes-Atlantique, Nantes, France
| | - Thibaut Larcher
- INRA, UMR703 PAnTher, Nantes, France
- LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l’alimentation Nantes-Atlantique, Nantes, France
| | - Laurence Dubreil
- INRA, UMR703 PAnTher, Nantes, France
- LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l’alimentation Nantes-Atlantique, Nantes, France
| | - Isabelle Leroux
- INRA, UMR703 PAnTher, Nantes, France
- LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l’alimentation Nantes-Atlantique, Nantes, France
| | - Céline Zuber
- INRA, UMR703 PAnTher, Nantes, France
- LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l’alimentation Nantes-Atlantique, Nantes, France
| | - Mireille Ledevin
- INRA, UMR703 PAnTher, Nantes, France
- LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l’alimentation Nantes-Atlantique, Nantes, France
| | - Jack-Yves Deschamps
- INRA, UMR703 PAnTher, Nantes, France
- LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l’alimentation Nantes-Atlantique, Nantes, France
| | - Yves Fromes
- LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l’alimentation Nantes-Atlantique, Nantes, France
- Laboratoire RMN AIM-CEA, Institut de Myologie, Hôpital Pitié-Salpêtrière, Paris, France
| | - Yan Cherel
- INRA, UMR703 PAnTher, Nantes, France
- LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l’alimentation Nantes-Atlantique, Nantes, France
| | - Laetitia Guevel
- INRA, UMR703 PAnTher, Nantes, France
- LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l’alimentation Nantes-Atlantique, Nantes, France
- Université de Nantes, Nantes, France
- * E-mail:
| | - Karl Rouger
- INRA, UMR703 PAnTher, Nantes, France
- LUNAM Université, Oniris, École nationale vétérinaire, agro-alimentaire et de l’alimentation Nantes-Atlantique, Nantes, France
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Sakuma K, Aoi W, Yamaguchi A. The intriguing regulators of muscle mass in sarcopenia and muscular dystrophy. Front Aging Neurosci 2014; 6:230. [PMID: 25221510 PMCID: PMC4148637 DOI: 10.3389/fnagi.2014.00230] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Accepted: 08/10/2014] [Indexed: 12/25/2022] Open
Abstract
Recent advances in our understanding of the biology of muscle have led to new interest in the pharmacological treatment of muscle wasting. Loss of muscle mass and increased intramuscular fibrosis occur in both sarcopenia and muscular dystrophy. Several regulators (mammalian target of rapamycin, serum response factor, atrogin-1, myostatin, etc.) seem to modulate protein synthesis and degradation or transcription of muscle-specific genes during both sarcopenia and muscular dystrophy. This review provides an overview of the adaptive changes in several regulators of muscle mass in both sarcopenia and muscular dystrophy.
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Affiliation(s)
- Kunihiro Sakuma
- Research Center for Physical Fitness, Sports and Health, Toyohashi University of Technology, Toyohashi, Japan
| | - Wataru Aoi
- Laboratory of Health Science, Graduate School of Life and Environmental Sciences, Kyoto Prefectural University, Kyoto, Japan
| | - Akihiko Yamaguchi
- Department of Physical Therapy, Health Sciences University of Hokkaido, Kanazawa, Japan
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Lu A, Poddar M, Tang Y, Proto JD, Sohn J, Mu X, Oyster N, Wang B, Huard J. Rapid depletion of muscle progenitor cells in dystrophic mdx/utrophin-/- mice. Hum Mol Genet 2014; 23:4786-800. [PMID: 24781208 DOI: 10.1093/hmg/ddu194] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Duchenne muscular dystrophy (DMD) patients lack dystrophin from birth; however, muscle weakness becomes apparent only at 3-5 years of age, which happens to coincide with the depletion of the muscle progenitor cell (MPC) pools. Indeed, MPCs isolated from older DMD patients demonstrate impairments in myogenic potential. To determine whether the progression of muscular dystrophy is a consequence of the decline in functional MPCs, we investigated two animal models of DMD: (i) dystrophin-deficient mdx mice, the most commonly utilized model of DMD, which has a relatively mild dystrophic phenotype and (ii) dystrophin/utrophin double knock-out (dKO) mice, which display a similar histopathologic phenotype to DMD patients. In contrast to age-matched mdx mice, we observed that both the number and regeneration potential of dKO MPCs rapidly declines during disease progression. This occurred in MPCs at both early and late stages of myogenic commitment. In fact, early MPCs isolated from 6-week-old dKO mice have reductions in proliferation, resistance to oxidative stress and multilineage differentiation capacities compared with age-matched mdx MPCs. This effect may potentially be mediated by fibroblast growth factor overexpression and/or a reduction in telomerase activity. Our results demonstrate that the rapid disease progression in the dKO model is associated, at least in part, with MPC depletion. Therefore, alleviating MPC depletion could represent an approach to delay the onset of the histopathologies associated with DMD patients.
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Affiliation(s)
- Aiping Lu
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Minakshi Poddar
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Ying Tang
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Jonathan D Proto
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Jihee Sohn
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Xiaodong Mu
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Nicholas Oyster
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Bing Wang
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
| | - Johnny Huard
- Department of Orthopaedic Surgery, University of Pittsburgh, Pittsburgh, PA 15219, USA
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Schneider JS, Shanmugam M, Gonzalez JP, Lopez H, Gordan R, Fraidenraich D, Babu GJ. Increased sarcolipin expression and decreased sarco(endo)plasmic reticulum Ca2+ uptake in skeletal muscles of mouse models of Duchenne muscular dystrophy. J Muscle Res Cell Motil 2013; 34:349-56. [DOI: 10.1007/s10974-013-9350-0] [Citation(s) in RCA: 45] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Accepted: 05/27/2013] [Indexed: 02/02/2023]
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17
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Lessa TB, Carvalho RC, Franciolli ALR, de Oliveira LJ, Barreto R, Feder D, Bressan FF, Miglino MA, Ambrósio CE. Muscle reorganisation through local injection of stem cells in the diaphragm of mdx mice. Acta Vet Scand 2012; 54:73. [PMID: 23231953 PMCID: PMC3537552 DOI: 10.1186/1751-0147-54-73] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2012] [Accepted: 12/05/2012] [Indexed: 12/22/2022] Open
Abstract
Background The diaphragm is the major respiratory muscle affected by Duchenne muscular dystrophy (DMD) and is responsible for causing 80% of deaths. The use of mechanical forces that act on the body or intermittent pressure on the airways improves the quality of life of patients but does not prevent the progression of respiratory failure. Thus, diseases that require tissue repair, such as DMD, represent a group of pathologies that have great potential for cell therapy. The application of stem cells directly into the diaphragm instead of systemic application can reduce cell migration to other affected areas and increase the chances of muscle reorganisation. The mdx mouse is a suitable animal model for this research because its diaphragmatic phenotype is similar to human DMD. Therefore, the aim of this study was to assess the potential cell implantation in the diaphragm muscle after the xenotransplantation of stem cells. Methods A total of 9 mice, including 3 control BALB/Cmice, 3 5-month-old mdx mice without stem cell injections and 3 mdx mice injected with stem cells, were used. The animals injected with stem cells underwent laparoscopy so that stem cells from GFP-labelled rabbit olfactory epithelium could be locally injected into the diaphragm muscle. After 8 days, all animals were euthanised, and the diaphragm muscle was dissected and subjected to histological and immunohistochemical analyses. Results Both the fresh diaphragm tissue and immunohistochemical analyses showed immunopositive GFP labelling of some of the cells and immunonegativity of myoblast bundles. In the histological analysis, we observed a reduction in the inflammatory infiltrate as well as the presence of a few peripheral nuclei and myoblast bundles. Conclusion We were able to implant stem cells into the diaphragm via local injection, which promoted moderate muscle reorganisation. The presence of myoblast bundles cannot be attributed to stem cell incorporation because there was no immunopositive labelling in this structure. It is believed that the formation of the bundles may have been stimulated by cellular signalling mechanisms that have not yet been elucidated.
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Contribution of oxidative stress to pathology in diaphragm and limb muscles with Duchenne muscular dystrophy. J Muscle Res Cell Motil 2012; 34:1-13. [DOI: 10.1007/s10974-012-9330-9] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 10/18/2012] [Indexed: 11/27/2022]
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Kim JH, Lawler JM. Amplification of proinflammatory phenotype, damage, and weakness by oxidative stress in the diaphragm muscle of mdx mice. Free Radic Biol Med 2012; 52:1597-606. [PMID: 22330042 DOI: 10.1016/j.freeradbiomed.2012.01.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2011] [Revised: 01/10/2012] [Accepted: 01/20/2012] [Indexed: 12/27/2022]
Abstract
Duchenne muscular dystrophy (DMD) is a common and devastating type of childhood-onset muscular dystrophy, attributed to an X-linked defect in the gene that encodes dystrophin. Myopathy with DMD is most pronounced in the diaphragm muscle and fast-twitch limb muscles and is dependent upon susceptibility to damage, inflammatory cell infiltration, and proinflammatory signaling (nuclear factor-κB; NF-κB). Although recent papers have reawakened the notion that oxidative stress links inflammatory signaling with pathology in DMD in limb muscle, the importance of redox mechanisms had been clouded by inconsistent results from indirect scavenger approaches, including in the diaphragm muscle. Therefore, we used a novel catalytic mimetic of superoxide dismutase and catalase (EUK-134) as a direct scavenger of oxidative stress in myopathy in the diaphragm of the mdx mouse model. EUK-134 reduced 4-hydroxynonenal and total hydroperoxides, markers of oxidative stress in the mdx diaphragm. EUK-134 also attenuated positive staining of macrophages and T-cells as well as activation of NF-κB and p65 protein abundance. Moreover, EUK-134 ameliorated markers of muscle damage including internalized nuclei, variability of cross-sectional area, and type IIc fibers. Finally, impairment of contractile force was partially rescued by EUK-134 in the diaphragm of mdx mice. We conclude that oxidative stress amplifies DMD pathology in the diaphragm muscle.
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Affiliation(s)
- Jong-Hee Kim
- Redox Biology and Cell Signaling Laboratory, Department of Health & Kinesiology, Texas A&M University, College Station, TX 77843-4243, USA
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Lawler JM. Exacerbation of pathology by oxidative stress in respiratory and locomotor muscles with Duchenne muscular dystrophy. J Physiol 2011; 589:2161-70. [PMID: 21486793 PMCID: PMC3098695 DOI: 10.1113/jphysiol.2011.207456] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2011] [Accepted: 03/02/2011] [Indexed: 12/15/2022] Open
Abstract
Duchenne muscular dystrophy (DMD) is the most devastating type of muscular dystrophy, leading to progressive weakness of respiratory (e.g. diaphragm) and locomotor muscles (e.g. gastrocnemius). DMD is caused by X-linked defects in the gene that encodes for dystrophin, a key scaffolding protein of the dystroglycan complex (DCG) within the sarcolemmal cytoskeleton. As a result of a compromised dystroglycan complex, mechanical integrity is impaired and important signalling proteins (e.g. nNOS, caveolin-3) and pathways are disrupted. Disruption of the dystroglycan complex leads to high susceptibility to injury with repeated, eccentric contractions as well as inflammation, resulting in significant damage and necrosis. Chronic damage and repair cycling leads to fibrosis and weakness. While the link between inflammation with damage and weakness in the DMD diaphragm is unresolved, elevated oxidative stress may contribute to damage, weakness and possibly fibrosis. While utilization of non-specific antioxidant interventions has yielded inconsistent results, recent data suggest that NAD(P)H oxidase could play a pivotal role in elevating oxidative stress via integrated changes in caveolin-3 and stretch-activated channels (SACs). Oxidative stress may act as an amplifier, exacerbating disruption of the dystroglycan complex, upregulation of the inflammatory transcription factor NF-B, and thus functional impairment of force-generating capacity.
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Affiliation(s)
- John M Lawler
- Department of Health and Kinesiology, Texas A&M University, College Station, TX 77843-4243, USA.
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Ghahramani Seno MM, Trollet C, Athanasopoulos T, Graham IR, Hu P, Dickson G. Transcriptomic analysis of dystrophin RNAi knockdown reveals a central role for dystrophin in muscle differentiation and contractile apparatus organization. BMC Genomics 2010; 11:345. [PMID: 20515474 PMCID: PMC2890566 DOI: 10.1186/1471-2164-11-345] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2010] [Accepted: 06/01/2010] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Duchenne muscular dystrophy (DMD) is a fatal muscle wasting disorder caused by mutations in the dystrophin gene. DMD has a complex and as yet incompletely defined molecular pathophysiology hindering development of effective ameliorative approaches. Transcriptomic studies so far conducted on dystrophic cells and tissues suffer from non-specific changes and background noise due to heterogeneous comparisons and secondary pathologies. A study design in which a perfectly matched control cell population is used as reference for transcriptomic studies will give a much more specific insight into the effects of dystrophin deficiency and DMD pathophysiology. RESULTS Using RNA interference (RNAi) to knock down dystrophin in myotubes from C57BL10 mice, we created a homogenous model to study the transcriptome of dystrophin-deficient myotubes. We noted significant differences in the global gene expression pattern between these myotubes and their matched control cultures. In particular, categorical analyses of the dysregulated genes demonstrated significant enrichment of molecules associated with the components of muscle cell contractile unit, ion channels, metabolic pathways and kinases. Additionally, some of the dysregulated genes could potentially explain conditions and endophenotypes associated with dystrophin deficiency, such as dysregulation of calcium homeostasis (Pvalb and Casq1), or cardiomyopathy (Obscurin, Tcap). In addition to be validated by qPCR, our data gains another level of validity by affirmatively reproducing several independent studies conducted previously at genes and/or protein levels in vivo and in vitro. CONCLUSION Our results suggest that in striated muscles, dystrophin is involved in orchestrating proper development and organization of myofibers as contractile units, depicting a novel pathophysiology for DMD where the absence of dystrophin results in maldeveloped myofibers prone to physical stress and damage. Therefore, it becomes apparent that any gene therapy approaches for DMD should target early stages in muscle development to attain a maximum clinical benefit. With a clear and specific definition of the transcriptome of dystrophin deficiency, manipulation of identified dysregulated molecules downstream of dystrophin may lead to novel ameliorative approaches for DMD.
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Tkatchenko TV, Moreno-Rodriguez RA, Conway SJ, Molkentin JD, Markwald RR, Tkatchenko AV. Lack of periostin leads to suppression of Notch1 signaling and calcific aortic valve disease. Physiol Genomics 2009; 39:160-8. [PMID: 19723774 DOI: 10.1152/physiolgenomics.00078.2009] [Citation(s) in RCA: 72] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
The Postn gene encodes protein periostin. During embryonic development, it is highly expressed in the outflow tract (OFT) endocardial cushions of the developing heart, which give rise to several structures of the mature heart including the aortic valve. Periostin was previously implicated in osteoblast differentiation, cancer metastasis, and tooth and bone development, but its role in cardiac OFT development is unclear. To elucidate the role that periostin plays in the developing heart we analyzed cardiac OFT phenotype in mice after deletion of the Postn gene. We found that lack of periostin in the embryonic OFT leads to ectopic expression of the proosteogenic growth factor pleiotrophin (Ptn) and overexpression of delta-like 1 homolog (Dlk1), a negative regulator of Notch1, in the distal (prevalvular) cushions of the OFT. This resulted in suppression of Notch1 signaling, strong induction of the central transcriptional regulator of osteoblast cell fate Runx2, upregulation of osteopontin and osteocalcin expression, and subsequent calcification of the aortic valve. Our data suggest that periostin represses a default osteogenic program in the OFT cushion mesenchyme and promotes differentiation along a fibrogenic lineage. Lack of periostin causes derepression of the osteogenic potential of OFT mesenchymal cells, calcium deposition, and calcific aortic valve disease. These results establish periostin as a key regulator of OFT endocardial cushion mesenchymal cell fate during embryonic development.
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Affiliation(s)
- Tatiana V Tkatchenko
- Department of Anatomy and Cell Biology, Wayne State University School of Medicine, Detroit, Michigan 48201, USA
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Vetrone SA, Montecino-Rodriguez E, Kudryashova E, Kramerova I, Hoffman EP, Liu SD, Miceli MC, Spencer MJ. Osteopontin promotes fibrosis in dystrophic mouse muscle by modulating immune cell subsets and intramuscular TGF-beta. J Clin Invest 2009; 119:1583-94. [PMID: 19451692 DOI: 10.1172/jci37662] [Citation(s) in RCA: 230] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2008] [Accepted: 04/01/2009] [Indexed: 01/05/2023] Open
Abstract
Duchenne muscular dystrophy (DMD) is an X-linked, degenerative muscle disease that is exacerbated by secondary inflammation. Here, we characterized the immunological milieu of dystrophic muscle in mdx mice, a model of DMD, to identify potential therapeutic targets. We identified a specific subpopulation of cells expressing the Vbeta8.1/8.2 TCR that is predominant among TCR-beta+ T cells. These cells expressed high levels of osteopontin (OPN), a cytokine that promotes immune cell migration and survival. Elevated OPN levels correlated with the dystrophic process, since OPN was substantially elevated in the serum of mdx mice and muscle biopsies after disease onset. Muscle biopsies from individuals with DMD also had elevated OPN levels. To test the role of OPN in mdx muscle, mice lacking both OPN and dystrophin were generated and termed double-mutant mice (DMM mice). Reduced infiltration of NKT-like cells and neutrophils was observed in the muscle of DMM mice, supporting an immunomodulatory role for OPN in mdx muscle. Concomitantly, an increase in CD4+ and FoxP3+ Tregs was also observed in DMM muscle, which also showed reduced levels of TGF-beta, a known fibrosis mediator. These inflammatory changes correlated with increased strength and reduced diaphragm and cardiac fibrosis. These studies suggest that OPN may be a promising therapeutic target for reducing inflammation and fibrosis in individuals with DMD.
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Affiliation(s)
- Sylvia A Vetrone
- Department of Neurology, David Geffen School of Medicine, UCLA, Los Angeles, California 90095-7334, USA
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Marotta M, Ruiz-Roig C, Sarria Y, Peiro JL, Nuñez F, Ceron J, Munell F, Roig-Quilis M. Muscle genome-wide expression profiling during disease evolution in mdx mice. Physiol Genomics 2009; 37:119-32. [DOI: 10.1152/physiolgenomics.90370.2008] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Mdx mice show a milder phenotype than Duchenne patients despite bearing an analogous genetic defect. Our aim was to sort out genes, differentially expressed during the evolution of skeletal muscle mdx mouse disease, to elucidate the mechanisms by which these animals overcome the lack of dystrophin. Genome-wide microarray-based gene expression analysis was carried out at 3 wk and 1.5 and 3 mo of life. Candidate genes were selected by comparing: 1) mdx vs. controls at each point in time, and 2) mdx mice and 3) control mice among the three points in time. The first analysis showed a strong upregulation (96%) of inflammation-related genes and in >75% of genes related to cell adhesion, muscle structure/regeneration, and extracellular matrix remodeling during mdx disease evolution. Lgals3, Postn, Ctss, and Sln genes showed the strongest variations. The analysis performed among points in time demonstrated significant changes in Ecm1, Spon1, Thbs1, Csrp3, Myo10, Pde4b, and Adamts-5 exclusively during mdx mice lifespan. RT-PCR analysis of Postn, Sln, Ctss, Thbs1, Ecm1, and Adamts-5 expression from 3 wk to 9 mo, confirmed microarray data and demonstrated variations beyond 3 mo of age. A high-confidence functional network analysis demonstrated a strong relationship between them and showed two main subnetworks, having Dmd- Utrn- Myo10 and Adamts5- Thbs1- Spon1-Postn as principal nodes, which are functionally linked to Abca1, Actn4, Crebbp, Csrp3, Lama1, Lama3, Mical2, Mical3, Myf6, Pxn, and Sparc genes. Candidate genes may participate in the decline of muscle necrosis in mdx mice and could be considered potential therapeutic targets for Duchenne patients.
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Affiliation(s)
- Mario Marotta
- Laboratori de Neurologia Infantil, Institut de Recerca, Barcelona, Spain
| | - Claudia Ruiz-Roig
- Laboratori de Neurologia Infantil, Institut de Recerca, Barcelona, Spain
| | - Yaris Sarria
- Laboratori de Neurologia Infantil, Institut de Recerca, Barcelona, Spain
| | - Jose Luis Peiro
- Unitat de Cirurgia Fetal i Neonatal, Departament de Cirurgia Pediàtrica, Barcelona, Spain
| | - Fatima Nuñez
- Unitat Cientifico-Tecnica de Suport (UCTS), Institut de Recerca, Barcelona, Spain
| | - Julian Ceron
- Genetics and Functional Genomics Group, Molecular Biology and Biochemistry Research Center for Nanomedicine (CIBBIM), Barcelona, Spain
| | - Francina Munell
- Unitat de Recerca Biomedica, Institut de Recerca, Barcelona, Spain
| | - Manuel Roig-Quilis
- Laboratori de Neurologia Infantil, Institut de Recerca, Barcelona, Spain
- Secció de Neurologia Infantil, Hospital Materno-Infantil, Hospital Universitari Vall d'Hebron, Barcelona, Spain
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25
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Microarray analysis of mdx mice expressing high levels of utrophin: therapeutic implications for dystrophin deficiency. Neuromuscul Disord 2008; 18:239-47. [PMID: 18343112 DOI: 10.1016/j.nmd.2007.11.011] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2007] [Revised: 10/10/2007] [Accepted: 11/19/2007] [Indexed: 11/22/2022]
Abstract
Duchenne Muscular Dystrophy (DMD) is a fatal muscle wasting disorder caused by dystrophin deficiency. Previous work suggested that increased expression of the dystrophin-related protein utrophin in the mdx mouse can reduce the dystrophic pathophysiology. Physiological tests showed that the transgenic mouse muscle functioned in a way similar to normal muscle. More recently, it has become possible to analyse disease pathways using microarrays, a sensitive method to evaluate the efficacy of a therapeutic approach. We thus examined the gene expression profile of mdx mouse muscle compared to wild-type mouse muscle and compared the data with that obtained from the transgenic line overexpressing utrophin. The data confirm that the expression of utrophin in the mdx mouse muscle results in a global gene expression profile more similar to that seen for the wild-type mouse. This study confirms that a strategy to up-regulate utrophin is likely to be beneficial in dystrophin deficiency.
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26
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Busse M, Schwarzburger M, Berger F, Hacker C, Munz B. Strong induction of the Tis11B gene in myogenic differentiation. Eur J Cell Biol 2007; 87:31-8. [PMID: 17889962 DOI: 10.1016/j.ejcb.2007.07.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2007] [Revised: 07/30/2007] [Accepted: 07/30/2007] [Indexed: 11/18/2022] Open
Abstract
TIS11B is a zinc-finger protein of the tristetraprolin (TTP) family. Using cDNA microarray analysis, we could identify the Tis11B gene based on its differential expression in myogenesis. Here, we demonstrate that expression of the Tis11B gene is strongly induced during differentiation of the murine myoblast cell line C2C12. By contrast, expression of Ttp itself was not induced in myogenesis. Pretreatment of the cells with the translation inhibitor cycloheximide demonstrated that Tis11B was a primary response gene in this process. In addition, pretreatment with the transcription inhibitor actinomycin D demonstrated that gene expression was regulated at the transcriptional level. Since specific inhibitors of p38 MAP kinase completely blocked Tis11B induction, we conclude that expression of the Tis11B gene is regulated at least in part by this signaling pathway which plays a central role in myogenesis. Induction of Tis11B expression was also observed in primary myoblasts isolated from two different mouse strains, indicating physiological relevance of our results. In addition, TIS11B might also be an important player during myogenic differentiation and regeneration in vivo, as we detected a marked decrease in expression in several muscle tissues of the dystrophic mdx mouse, a model for continuous muscle degeneration and regeneration. These data suggest that TIS11B is an important regulator of myogenesis.
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Affiliation(s)
- Melanie Busse
- Institute of Physiology, Charité - University Medicine Berlin, Arnimallee 22, D-14195 Berlin, Germany
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27
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Doran P, Gannon J, O'Connell K, Ohlendieck K. Proteomic profiling of animal models mimicking skeletal muscle disorders. Proteomics Clin Appl 2007; 1:1169-84. [PMID: 21136766 DOI: 10.1002/prca.200700042] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2007] [Indexed: 01/01/2023]
Abstract
Over the last few decades of biomedical research, animal models of neuromuscular diseases have been widely used for determining pathological mechanisms and for testing new therapeutic strategies. With the emergence of high-throughput proteomics technology, the identification of novel protein factors involved in disease processes has been decisively improved. This review outlines the usefulness of the proteomic profiling of animal disease models for the discovery of new reliable biomarkers, for the optimization of diagnostic procedures and the development of new treatment options for skeletal muscle disorders. Since inbred animal strains show genetically much less interindividual differences as compared to human patients, considerably lower experimental repeats are capable of producing meaningful proteomic data. Thus, animal model proteomics can be conveniently employed for both studying basic mechanisms of molecular pathogenesis and the effects of drugs, genetic modifications or cell-based therapies on disease progression. Based on the results from comparative animal proteomics, a more informed decision on the design of clinical proteomics studies could be reached. Since no one animal model represents a perfect pathobiochemical replica of all of the symptoms seen in complex human disorders, the proteomic screening of novel animal models can also be employed for swift and enhanced protein biochemical phenotyping.
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Affiliation(s)
- Philip Doran
- Department of Biology, National University of Ireland, Maynooth Co. Kildare, Ireland
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28
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McCarthy JJ, Esser KA, Andrade FH. MicroRNA-206 is overexpressed in the diaphragm but not the hindlimb muscle of mdx mouse. Am J Physiol Cell Physiol 2007; 293:C451-7. [PMID: 17459947 DOI: 10.1152/ajpcell.00077.2007] [Citation(s) in RCA: 105] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
MicroRNAs are highly conserved, noncoding RNAs involved in posttranscriptional gene silencing. MicroRNAs have been shown to be involved in a range of biological processes, including myogenesis and muscle regeneration. The objective of this study was to test the hypothesis that microRNA expression is altered in dystrophic muscle, with the greatest change occurring, of the muscles examined, in the diaphragm. The expression of the muscle-enriched microRNAs was determined in the soleus, plantaris, and diaphragm muscles of control and dystrophin-deficient ( mdx) mice by semiquantitative PCR. In the soleus and plantaris, expression of the mature microRNA 133a (miR-133a) and miR-206, respectively, was decreased by ∼25%, whereas in the diaphragm, miR-206 expression increased by 4.5-fold relative to control. The increased expression of miR-206 in the mdx diaphragm was paralleled by a 4.4-fold increase in primary miRNA-206 (pri-miRNA-206) transcript level. Expression of Myod1 was elevated 2.7-fold only in the mdx diaphragm, consistent with an earlier finding demonstrating Myod1 can activate pri-miRNA-206 transcription. Transcript levels of Drosha and Dicer, major components of microRNA biogenesis pathway, were unchanged in mdx muscle, suggesting the pathway is not altered under dystrophic conditions. Previous in vitro analysis found miR-206 was capable of repressing utrophin expression; however, under dystrophic conditions, both utrophin transcript and protein levels were significantly increased by 69% and 3.9-fold, respectively, a finding inconsistent with microRNA regulation. These results are the first to report alterations in expression of muscle-enriched microRNAs in skeletal muscle of the mdx mouse, suggesting microRNAs may have a role in the pathophysiology of muscular dystrophy.
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Affiliation(s)
- John J McCarthy
- Dept. of Physiology, University of Kentucky Medical Center, 800 Rose St., Lexington, KY 40536-0298, USA.
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29
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McClure WC, Rabon RE, Ogawa H, Tseng BS. Upregulation of the creatine synthetic pathway in skeletal muscles of mature mdx mice. Neuromuscul Disord 2007; 17:639-50. [PMID: 17588756 PMCID: PMC2706264 DOI: 10.1016/j.nmd.2007.04.008] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2006] [Revised: 03/23/2007] [Accepted: 04/02/2007] [Indexed: 11/24/2022]
Abstract
Duchenne muscular dystrophy (DMD) is a fatal neuromuscular human disease caused by dystrophin deficiency. The mdx mouse lacks dystrophin protein, yet does not exhibit the debilitating DMD phenotype. Investigating compensatory mechanisms in the mdx mouse may shed new insights into modifying DMD pathogenesis. This study targets two metabolic genes, guanidinoacetate methyltransferase (GAMT) and arginine:glycine amidinotransferase (AGAT) which are required for creatine synthesis. We show that GAMT and AGAT mRNA are up-regulated 5.4- and 1.9-fold respectively in adult mdx muscle compared to C57. In addition, GAMT protein expression is up-regulated at least 2.5-fold in five different muscles of mdx vs. control. Furthermore, we find GAMT immunoreactivity in up to 80% of mature mdx muscle fibers in addition to small regenerating fibers and rare revertants; while GAMT immunoreactivity is equal to background levels in all muscle fibers of mature C57 mice. The up-regulation of the creatine synthetic pathway may help maintain muscle creatine levels and limit cellular energy failure in leaky mdx skeletal muscles. These results may help better understand the mild phenotype of the mdx mouse and may offer new treatment horizons for DMD.
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Affiliation(s)
- Warren C McClure
- Department of Pediatrics, University of Colorado-Denver Health Science Center, The Children's Hospital Fitzsimons Campus, Aurora, CO 80045, USA
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30
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Doran P, Martin G, Dowling P, Jockusch H, Ohlendieck K. Proteome analysis of the dystrophin-deficient MDX diaphragm reveals a drastic increase in the heat shock protein cvHSP. Proteomics 2006; 6:4610-21. [PMID: 16835851 DOI: 10.1002/pmic.200600082] [Citation(s) in RCA: 98] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Duchenne muscular dystrophy is the most commonly inherited neuromuscular disorder in humans. Although the primary genetic deficiency of dystrophin in X-linked muscular dystrophy is established, it is not well-known how pathophysiological events trigger the actual fibre degeneration. We have therefore performed a DIGE analysis of normal diaphragm muscle versus the severely affected x-linked muscular dystrophy (MDX) diaphragm, which represents an established animal model of dystrophinopathy. Out of 2398 detectable 2-D protein spots, 35 proteins showed a drastic differential expression pattern, with 21 proteins being decreased, including Fbxo11-protein, adenylate kinase, beta-haemoglobin and dihydrolipoamide dehydrogenase, and 14 proteins being increased, including cvHSP, aldehyde reductase, desmin, vimentin, chaperonin, cardiac and muscle myosin heavy chain. This suggests that lack of sarcolemmal integrity triggers a generally perturbed protein expression pattern in dystrophin-deficient fibres. However, the most significant finding was the dramatic increase in the small heat shock protein cvHSP, which was confirmed by 2-D immunoblotting. Confocal fluorescence microscopy revealed elevated levels of cvHSP in MDX fibres. An immunoblotting survey of other key heat shock proteins showed a differential expression pattern in MDX diaphragm. Stress response appears to be an important cellular mechanism in dystrophic muscle and may be exploitable as a new approach to counteract muscle degeneration.
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Affiliation(s)
- Philip Doran
- Department of Biology, National University of Ireland, Maynooth, Co. Kildare, Ireland
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31
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Tkatchenko AV, Walsh PA, Tkatchenko TV, Gustincich S, Raviola E. Form deprivation modulates retinal neurogenesis in primate experimental myopia. Proc Natl Acad Sci U S A 2006; 103:4681-6. [PMID: 16537371 PMCID: PMC1400590 DOI: 10.1073/pnas.0600589103] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Juvenile primates develop myopia when their visual experience is degraded by lid fusion. In response to this abnormal visual input, retinal neural networks cause an excessive growth of the postequatorial segment of the eye, but the mechanism underlying this axial elongation is unknown. After fusion of the lids in one eye of juvenile rhesus macaques and green monkeys, we combined cDNA subtractions, microarray profiling, and real-time PCR to compare gene expression in the retinas of the closed and open eyes. This molecular analysis showed up-regulation of a number of genes associated with cell division in the retina of the closed eye and differential expression of six genes localized to chromosomal loci linked to forms of human hereditary myopia. In addition, it substantiated a previous observation, based on immunocytochemistry, that synthesis of vasoactive intestinal polypeptide was increased upon lid fusion. Injection of 5-bromo-2'-deoxyuridine and immunocytochemistry showed that the primate retinal periphery harbors mitotically active neuroprogenitor cells that increase in number when the visual experience is altered by lid fusion. Furthermore, the number of dividing cells is highly correlated with axial elongation of the eye and the resulting myopic refractive error. Thus, the retina undergoes active growth during the postnatal development of the primate eye. This growth is modulated by the visual input and accelerates considerably when the eye develops axial myopia. Vasoactive intestinal polypeptide may be the molecule that stimulates retinal growth.
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Affiliation(s)
- Andrei V. Tkatchenko
- *Department of Neurobiology, Harvard Medical School, 220 Longwood Avenue, Boston, MA 02115; and
| | - Pamela A. Walsh
- *Department of Neurobiology, Harvard Medical School, 220 Longwood Avenue, Boston, MA 02115; and
| | - Tatiana V. Tkatchenko
- Department of Genetics, Harvard Medical School, 77 Avenue Louis Pasteur, Boston, MA 02115
| | - Stefano Gustincich
- *Department of Neurobiology, Harvard Medical School, 220 Longwood Avenue, Boston, MA 02115; and
| | - Elio Raviola
- *Department of Neurobiology, Harvard Medical School, 220 Longwood Avenue, Boston, MA 02115; and
- To whom correspondence should be addressed. E-mail:
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32
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Kho AT, Kang PB, Kohane IS, Kunkel LM. Transcriptome-scale similarities between mouse and human skeletal muscles with normal and myopathic phenotypes. BMC Musculoskelet Disord 2006; 7:23. [PMID: 16522209 PMCID: PMC1525166 DOI: 10.1186/1471-2474-7-23] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2005] [Accepted: 03/07/2006] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Mouse and human skeletal muscle transcriptome profiles vary by muscle type, raising the question of which mouse muscle groups have the greatest molecular similarities to human skeletal muscle. METHODS Orthologous (whole, sub-) transcriptome profiles were compared among four mouse-human transcriptome datasets: (M) six muscle groups obtained from three mouse strains (wildtype, mdx, mdx5cv); (H1) biopsied human quadriceps from controls and Duchenne muscular dystrophy patients; (H2) four different control human muscle types obtained at autopsy; and (H3) 12 different control human tissues (ten non-muscle). RESULTS Of the six mouse muscles examined, mouse soleus bore the greatest molecular similarities to human skeletal muscles, independent of the latters' anatomic location/muscle type, disease state, age and sampling method (autopsy versus biopsy). Significant similarity to any one mouse muscle group was not observed for non-muscle human tissues (dataset H3), indicating this finding to be muscle specific. CONCLUSION This observation may be partly explained by the higher type I fiber content of soleus relative to the other mouse muscles sampled.
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Affiliation(s)
- Alvin T Kho
- Children's Hospital Informatics Program, Harvard-MIT Division of Health Sciences and Technology, Cambridge, Massachusetts, USA
- Program in Genomics, Children's Hospital Boston and Harvard Medical School, Boston, Massachusetts, USA
| | - Peter B Kang
- Program in Genomics, Children's Hospital Boston and Harvard Medical School, Boston, Massachusetts, USA
- Department of Neurology, Children's Hospital Boston and Harvard Medical School, Boston, Massachusetts, USA
| | - Isaac S Kohane
- Children's Hospital Informatics Program, Harvard-MIT Division of Health Sciences and Technology, Cambridge, Massachusetts, USA
| | - Louis M Kunkel
- Program in Genomics, Children's Hospital Boston and Harvard Medical School, Boston, Massachusetts, USA
- Howard Hughes Medical Institute, Children's Hospital Boston, Boston, Massachusetts, USA
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Doran P, Dowling P, Donoghue P, Buffini M, Ohlendieck K. Reduced expression of regucalcin in young and aged mdx diaphragm indicates abnormal cytosolic calcium handling in dystrophin-deficient muscle. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2006; 1764:773-85. [PMID: 16483859 DOI: 10.1016/j.bbapap.2006.01.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2005] [Revised: 12/09/2005] [Accepted: 01/02/2006] [Indexed: 11/16/2022]
Abstract
The cytosolic Ca2+ -binding protein regucalcin is involved in intracellular signaling and present in high abundance in the liver. Here, we could show by comparative mass spectrometry-based proteomics screening of normal versus dystrophic fibres that regucalcin of 33.9 kDa and pI5.2 also exists in diaphragm muscle. Since the expression of sarcolemmal Ca2+ -leak channels and luminal Ca2+ -binding elements is altered in dystrophin-deficient muscle, we initiated this study in order to determine whether additional soluble muscle proteins involved in Ca2+ -handling are affected in muscular dystrophy. Following separation by two-dimensional gel electrophoresis, the spot pattern of the normal versus the mdx diaphragm muscle proteome was evaluated by densitometry. The expression levels of 20 major protein spots were shown to change and their identity determined by mass spectrometry. A 2-fold reduction of regucalcin in mdx diaphragm, as well as in dystrophic limb muscle and heart, was confirmed by immunoblotting in both young and aged mdx mice. The results from our proteomics analysis of dystrophic diaphragm support the concept that abnormal Ca2+ -handling is involved in x-linked muscular dystrophy. The reduction in key Ca2+ -handling proteins may result in an insufficient maintenance of Ca2+ -homeostasis and an abnormal regulation of Ca2+ -dependent enzymes resulting in disturbed intracellular signaling mechanisms in dystrophinopathies.
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Affiliation(s)
- Philip Doran
- Department of Biology, National University of Ireland, Maynooth, Co. Kildare, Ireland
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von der Hagen M, Laval SH, Cree LM, Haldane F, Pocock M, Wappler I, Peters H, Reitsamer HA, Hoger H, Wiedner M, Oberndorfer F, Anderson LVB, Straub V, Bittner RE, Bushby KMD. The differential gene expression profiles of proximal and distal muscle groups are altered in pre-pathological dysferlin-deficient mice. Neuromuscul Disord 2005; 15:863-77. [PMID: 16288871 DOI: 10.1016/j.nmd.2005.09.002] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2005] [Revised: 08/23/2005] [Accepted: 09/06/2005] [Indexed: 10/25/2022]
Abstract
The selective pattern of muscle involvement is a key feature of muscular dystrophies. Dysferlinopathy is a good model for studying this process since it shows variable muscle involvement that can be highly selective even in individual patients. The transcriptomes of proximal and distal muscles from wildtype C57BL/10 and dysferlin deficient C57BL/10.SJL-Dysf mice at a prepathological stage were assessed using the Affymetrix oligonucleotide-microarray system. We detected significant variation in gene expression between proximal and distal muscle in wildtype mice. Dysferlin defiency, even in the absence of pathological changes, altered this proximal distal difference but with little specific overlap with previous microarray analyses of dysferlinopathy. In conclusion, proximal and distal muscle groups show distinct patterns of gene expression and respond differently to dysferlin deficiency. This has implications for the selection of muscles for future microarray analyses, and also offers new routes for investigating the selectivity of muscle involvement in muscular dystrophies.
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35
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Haslett JN, Kang PB, Han M, Kho AT, Sanoudou D, Volinski JM, Beggs AH, Kohane IS, Kunkel LM. The influence of muscle type and dystrophin deficiency on murine expression profiles. Mamm Genome 2005; 16:739-48. [PMID: 16261416 DOI: 10.1007/s00335-005-0053-8] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2005] [Accepted: 06/16/2005] [Indexed: 11/24/2022]
Abstract
The phenotypic differences among Duchenne muscular dystrophy patients, mdx mice, and mdx(5cv) mice suggest that despite the common etiology of dystrophin deficiency, secondary mechanisms have a substantial influence on phenotypic severity. The differential response of various skeletal muscles to dystrophin deficiency supports this hypothesis. To explore these differences, gene expression profiles were generated from duplicate RNA targets extracted from six different skeletal muscles (diaphragm, soleus, gastrocnemius, quadriceps, tibialis anterior, and extensor digitorum longus) from wild-type, mdx, and mdx(5cv) mice, resulting in 36 data sets for 18 muscle samples. The data sets were compared in three different ways: (1) among wild-type samples only, (2) among all 36 data sets, and (3) between strains for each muscle type. The molecular profiles of soleus and diaphragm separate significantly from the other four muscle types and from each other. Fiber-type proportions can explain some of these differences. These variations in wild-type gene expression profiles may also reflect biomechanical differences known to exist among skeletal muscles. Further exploration of the genes that most distinguish these muscles may help explain the origins of the biomechanical differences and the reasons why some muscles are more resistant than others to dystrophin deficiency.
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Affiliation(s)
- Judith N Haslett
- Division of Genetics and Genomics Program, Children's Hospital Boston and Harvard Medical School, Boston, Massachusetts 02115, USA
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36
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Kostrominova TY, Dow DE, Dennis RG, Miller RA, Faulkner JA. Comparison of gene expression of 2-mo denervated, 2-mo stimulated-denervated, and control rat skeletal muscles. Physiol Genomics 2005; 22:227-43. [PMID: 15840640 DOI: 10.1152/physiolgenomics.00210.2004] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Loss of innervation in skeletal muscles leads to degeneration, atrophy, and loss of force. These dramatic changes are reflected in modifications of the mRNA expression of a large number of genes. Our goal was to clarify the broad spectrum of molecular events associated with long-term denervation of skeletal muscles. A microarray study compared gene expression profiles of 2-mo denervated and control extensor digitorum longus (EDL) muscles from 6-mo-old rats. The study identified 121 genes with increased and 7 genes with decreased mRNA expression. The expression of 107 of these genes had not been identified previously as changed after denervation. Many of the genes identified were genes that are highly expressed in skeletal muscles during embryonic development, downregulated in adults, and upregulated after denervation of muscle fibers. Electrical stimulation of denervated muscles preserved muscle mass and maximal force at levels similar to those in the control muscles. To understand the processes underlying the effect of electrical stimulation on denervated skeletal muscles, mRNA and protein expression of a number of genes, identified by the microarray study, was compared. The hypothesis was that loss of nerve action potentials and muscle contractions after denervation play the major roles in upregulation of gene expression in skeletal muscles. With electrical stimulation of denervated muscles, the expression levels for these genes were significantly downregulated, consistent with the hypothesis that loss of action potentials and/or contractions contribute to the alterations in gene expression in denervated skeletal muscles.
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Affiliation(s)
- Tatiana Y Kostrominova
- Institute of Gerontology, Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan 48109-2007, USA.
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37
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Turk R, Sterrenburg E, de Meijer EJ, van Ommen GJB, den Dunnen JT, 't Hoen PAC. Muscle regeneration in dystrophin-deficient mdx mice studied by gene expression profiling. BMC Genomics 2005; 6:98. [PMID: 16011810 PMCID: PMC1190170 DOI: 10.1186/1471-2164-6-98] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2005] [Accepted: 07/13/2005] [Indexed: 01/19/2023] Open
Abstract
Background Duchenne muscular dystrophy (DMD), caused by mutations in the dystrophin gene, is lethal. In contrast, dystrophin-deficient mdx mice recover due to effective regeneration of affected muscle tissue. To characterize the molecular processes associated with regeneration, we compared gene expression levels in hindlimb muscle tissue of mdx and control mice at 9 timepoints, ranging from 1–20 weeks of age. Results Out of 7776 genes, 1735 were differentially expressed between mdx and control muscle at at least one timepoint (p < 0.05 after Bonferroni correction). We found that genes coding for components of the dystrophin-associated glycoprotein complex are generally downregulated in the mdx mouse. Based on functional characteristics such as membrane localization, signal transduction, and transcriptional activation, 166 differentially expressed genes with possible functions in regeneration were analyzed in more detail. The majority of these genes peak at the age of 8 weeks, where the regeneration activity is maximal. The following pathways are activated, as shown by upregulation of multiple members per signalling pathway: the Notch-Delta pathway that plays a role in the activation of satellite cells, and the Bmp15 and Neuregulin 3 signalling pathways that may regulate proliferation and differentiation of satellite cells. In DMD patients, only few of the identified regeneration-associated genes were found activated, indicating less efficient regeneration processes in humans. Conclusion Based on the observed expression profiles, we describe a model for muscle regeneration in mdx mice, which may provide new leads for development of DMD therapies based on the improvement of muscle regeneration efficacy.
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Affiliation(s)
- R Turk
- Center for Human and Clinical Genetics, Leiden University Medical Center, Wassenaarseweg 72, 2333 AL Leiden, Nederland
- Department of Physiology and Biophysics, Howard Hughes Medical Institute, University of Iowa, 400 Eckstein Medical Research Building, Iowa City, IA52240-1101, U.S.A
| | - E Sterrenburg
- Center for Human and Clinical Genetics, Leiden University Medical Center, Wassenaarseweg 72, 2333 AL Leiden, Nederland
| | - EJ de Meijer
- Center for Human and Clinical Genetics, Leiden University Medical Center, Wassenaarseweg 72, 2333 AL Leiden, Nederland
| | - G-JB van Ommen
- Center for Human and Clinical Genetics, Leiden University Medical Center, Wassenaarseweg 72, 2333 AL Leiden, Nederland
| | - JT den Dunnen
- Center for Human and Clinical Genetics, Leiden University Medical Center, Wassenaarseweg 72, 2333 AL Leiden, Nederland
- Leiden Genome Technology Center, Leiden University Medical Center, Wassenaarseweg 72, 2333 AL Leiden, Nederland
| | - PAC 't Hoen
- Center for Human and Clinical Genetics, Leiden University Medical Center, Wassenaarseweg 72, 2333 AL Leiden, Nederland
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Suzuki N, Aoki M, Hinuma Y, Takahashi T, Onodera Y, Ishigaki A, Kato M, Warita H, Tateyama M, Itoyama Y. Expression profiling with progression of dystrophic change in dysferlin-deficient mice (SJL). Neurosci Res 2005; 52:47-60. [PMID: 15811552 DOI: 10.1016/j.neures.2005.01.006] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2004] [Revised: 12/27/2004] [Accepted: 01/17/2005] [Indexed: 12/31/2022]
Abstract
The SJL mouse is a model for human dysferlinopathy (limb-girdle muscular dystrophy type 2B and Miyoshi myopathy). We used cDNA microarrays to compare the expression profiles of 10,012 genes in control and SJL quadriceps femoris muscles in order to find genes involved in the degeneration and regeneration process and in dysferlin's functional network. Many genes involved in the process of muscle regeneration are observed to be up-regulated in SJL mice, including cardiac ankyrin repeated protein (CARP), Neuraminidase 2, interleukin-6, insulin-like growth factor-2 and osteopontin. We found the upregulation of S100 calcium binding proteins, neural precursor cell expressed, developmentally down-regulated gene 4-like (NEDD4L) with C2 domain, and intracellular protein traffic associated proteins (Rab6 and Rab2). These proteins have the potential to interact with dysferlin. We must reveal some other molecules which may work with dysferlin in order to clarify the pathological network of dysferlinopathy. This process may lead to future improvements in the therapy for human dysferlinopathy.
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Affiliation(s)
- Naoki Suzuki
- Department of Neurology, Tohoku University School of Medicine, 1-1 Seiryo-machi, Sendai 980-8574, Japan.
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Brazeau GA. Understanding Cellular Signaling Pathways and Their Relationship to Genotype and Phenotype of Muscle Disease. Exp Biol Med (Maywood) 2005; 230:289-90. [PMID: 15855294 DOI: 10.1177/153537020523000501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Gayle A Brazeau
- Department of Pharmacy Practice, School of Pharmacy and Pharmaceutical Sciences, University at Buffalo, Cooke 126 Dean's Office, Amherst, New York 14260, USA.
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40
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Fisher I, Abraham D, Bouri K, Hoffmann EP, Hoffman EP, Muntoni F, Morgan J. Prednisolone‐induced changes in dystrophic skeletal muscle. FASEB J 2005; 19:834-6. [PMID: 15734791 DOI: 10.1096/fj.04-2511fje] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Although glucocorticoids delay the progression of Duchenne muscular dystrophy (DMD) their mechanism of action is unknown. Skeletal muscle gene expression profiles of mdx mice, an animal model of DMD, treated with prednisolone were compared with control mice at 1 and 6 wk. Of the 89 early differentially regulated genes and ESTs, delta-sarcoglycan, myosin Va, FK506-binding protein 51 (FKBP51), the potassium channel regulator potassium inwardly-rectifying channel Isk-like (IRK2) and ADAM 10 were overexpressed, whereas growth hormone-releasing hormone receptor (GHRHR) and Homer-2 were underexpressed. The 58 late differentially overexpressed genes included kallikreins (13, 16, and 26), FKBP51, PI3K alpha regulatory subunit, and IGFBP6, while underexpressed genes included NeuroD and nicotinic cholinergic receptor gamma. At both time points, overexpression of a cohort of genes relating to metabolism and proteolysis was apparent, alongside the differential expression of genes relating to calcium metabolism. Treatment did not increase muscle regeneration, reduce the number of infiltrating macrophages, or alter utrophin expression or localization. However, in the treated mdx soleus muscle, the percentage of slow fibers was significantly lower compared with untreated controls after 6 wk of treatment. These results show that glucocorticoids confer their benefit to dystrophic muscle in a complex fashion, culminating in a switch to a more normal muscle fiber type.
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MESH Headings
- Amyloid Precursor Protein Secretases
- Animals
- Aspartic Acid Endopeptidases
- Blotting, Western
- Calcineurin/analysis
- Carrier Proteins/genetics
- Endopeptidases/genetics
- Gene Expression/drug effects
- Gene Expression Profiling
- Gene Expression Regulation/drug effects
- Homer Scaffolding Proteins
- Male
- Mice
- Mice, Inbred mdx
- Muscle Fibers, Slow-Twitch/drug effects
- Muscle Fibers, Slow-Twitch/pathology
- Muscle, Skeletal/drug effects
- Muscle, Skeletal/metabolism
- Muscle, Skeletal/pathology
- Muscular Dystrophy, Animal/metabolism
- Muscular Dystrophy, Animal/pathology
- NFATC Transcription Factors/analysis
- Necrosis
- Oligonucleotide Array Sequence Analysis
- Potassium Channels, Inwardly Rectifying/genetics
- Prednisolone/pharmacology
- Receptors, Neuropeptide/genetics
- Receptors, Pituitary Hormone-Regulating Hormone/genetics
- Tacrolimus Binding Proteins/genetics
- Utrophin/genetics
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Affiliation(s)
- Ivan Fisher
- Muscle Cell Biology Group, MRC Clinical Sciences Centre, Imperial College, London, UK
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41
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Doran P, Dowling P, Lohan J, McDonnell K, Poetsch S, Ohlendieck K. Subproteomics analysis of Ca+-binding proteins demonstrates decreased calsequestrin expression in dystrophic mouse skeletal muscle. ACTA ACUST UNITED AC 2004; 271:3943-52. [PMID: 15373840 DOI: 10.1111/j.1432-1033.2004.04332.x] [Citation(s) in RCA: 74] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Duchenne muscular dystrophy represents one of the most common hereditary diseases. Abnormal ion handling is believed to render dystrophin-deficient muscle fibres more susceptible to necrosis. Although a reduced Ca(2+) buffering capacity has been shown to exist in the dystrophic sarcoplasmic reticulum, surprisingly no changes in the abundance of the main luminal Ca(2+) reservoir protein calsequestrin have been observed in microsomal preparations. To address this unexpected finding and eliminate potential technical artefacts of subcellular fractionation protocols, we employed a comparative subproteomics approach with total mouse skeletal muscle extracts. Immunoblotting, mass spectrometry and labelling of the entire muscle protein complement with the cationic carbocyanine dye 'Stains-All' was performed in order to evaluate the fate of major Ca(2+)-binding proteins in dystrophin-deficient skeletal muscle fibres. In contrast to a relatively comparable expression pattern of the main protein population in normal vs. dystrophic fibres, our analysis showed that the expression of key Ca(2+)-binding proteins of the luminal sarcoplasmic reticulum is drastically reduced. This included the main terminal cisternae constituent, calsequestrin, and the previously implicated Ca(2+)-shuttle element, sarcalumenin. In contrast, the 'Stains-All'-positive protein spot, representing the cytosolic Ca(2+)-binding component, calmodulin, was not changed in dystrophin-deficient fibres. The reduced 2D 'Stains-All' pattern of luminal Ca(2+)-binding proteins in mdx preparations supports the calcium hypothesis of muscular dystrophy. The previously described impaired Ca(2+) buffering capacity of the dystrophic sarcoplasmic reticulum is probably caused by a reduction in luminal Ca(2+)-binding proteins, including calsequestrin.
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Affiliation(s)
- Philip Doran
- Department of Biology, National University of Ireland, Maynooth, County Kildare, Ireland
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42
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Fernandez D, Santos P, Agostini C, Bon MC, Petitot AS, C Silva M, Guerra-Guimarães L, Ribeiro A, Argout X, Nicole M. Coffee (Coffea arabica L.) genes early expressed during infection by the rust fungus (Hemileia vastatrix). MOLECULAR PLANT PATHOLOGY 2004; 5:527-36. [PMID: 20565627 DOI: 10.1111/j.1364-3703.2004.00250.x] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
SUMMARY The beverage cash crop coffee (Coffea arabica L.) is subject to severe losses caused by the rust fungus Hemileia vastatrix. In naturally resistant coffee plants, a specific hypersensitive reaction (HR) may be elicited early to stop fungal infection. To isolate host genes involved in HR, we undertook an expressed sequence tags (ESTs) analysis. Two cDNA libraries were constructed using suppression subtractive hybridization (SSH) and 527 non-redundant ESTs were generated from 784 randomly picked clones. Classification of the ESTs into several functional categories showed that more than one-quarter of the predicted proteins might encode disease resistance (R) proteins, stress- and defence-proteins, and components of signal transduction pathways. Twenty-eight differentially screened sequences (DSSs) were selected after differential hybridization of 1000 cDNA clones from each library. Investigation of the expression patterns of a subset of 13 DSSs showed higher levels of gene expression in inoculated plants compared with control plants. HR-up-regulation of transcript accumulation occurred for 9 out of the 13 genes 24 and 48 h after H. vastatrix challenge. Two genes encoded homologues of the Arabidopsis DND1 and NDR1 proteins, suggesting conservation of resistance signalling pathways in perennial plants. Other HR-regulated sequences matched receptor kinases, AP2 domain- and WRKY transcription factors, cytochromes P450, heat shock 70 proteins, glucosyltransferases and proteins of unknown function. The ESTs reported here provide a useful resource for studying coffee resistance responses and for improving C. arabica for durable disease resistance.
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Affiliation(s)
- Diana Fernandez
- Institut de Recherche pour le Développement (IRD), UMR 1097 Diversité et Génome des Plantes Cultivées, Equipe Résistance des Plantes, 911 avenue Agropolis, BP64501, 34394 Montpellier Cedex 5, France
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43
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Le Meur N, Lamirault G, Bihouée A, Steenman M, Bédrine-Ferran H, Teusan R, Ramstein G, Léger JJ. A dynamic, web-accessible resource to process raw microarray scan data into consolidated gene expression values: importance of replication. Nucleic Acids Res 2004; 32:5349-58. [PMID: 15475389 PMCID: PMC524282 DOI: 10.1093/nar/gkh870] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
We propose a freely accessible web-based pipeline, which processes raw microarray scan data to obtain experimentally consolidated gene expression values. The tool MADSCAN, which stands for MicroArray Data Suites of Computed ANalysis, makes a practical choice among the numerous methods available for filtering, normalizing and scaling of raw microarray expression data in a dynamic and automatic way. Different statistical methods have been adapted to extract reliable information from replicate gene spots as well as from replicate microarrays for each biological situation under study. A carefully constructed experimental design thus allows to detect outlying expression values and to identify statistically significant expression values, together with a list of quality controls with proposed threshold values. The integrated processing procedure described here, based on multiple measurements per gene, is decisive for reliably monitoring subtle gene expression changes typical for most biological events.
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Affiliation(s)
- Nolwenn Le Meur
- Ouest genopole, Institut du Thorax, Institut National de la Santé et de la Recherche Médicale (UMR 533), Faculté de Médecine, 44035 Nantes, France.
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44
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Pruett ND, Tkatchenko TV, Jave-Suarez L, Jacobs DF, Potter CS, Tkatchenko AV, Schweizer J, Awgulewitsch A. Krtap16, characterization of a new hair keratin-associated protein (KAP) gene complex on mouse chromosome 16 and evidence for regulation by Hoxc13. J Biol Chem 2004; 279:51524-33. [PMID: 15385554 DOI: 10.1074/jbc.m404331200] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Abstract
Intermediate filament (IF) keratins and keratin-associated proteins (KAPs) are principal structural components of hair and encoded by members of multiple gene families. The severe hair growth defects observed upon aberrant expression of certain keratin and KAP genes in both mouse and man suggest that proper hair growth requires their spatio-temporally coordinated activation. An essential prerequisite for studying these cis-regulatory mechanisms is to define corresponding gene families, their genomic organization, and expression patterns. This work characterizes eight recently identified high glycine/tyrosine (HGT)-type KAP genes collectively designated Krtap16-n. These genes are shown to be integrated into a larger KAP gene domain on mouse chromosome 16 (MMU16) that is orthologous to a recently described HGT- and high sulfur (HS)-type KAP gene complex on human chromosome 21q22.11. All Krtap16 genes exhibit strong expression in a narrowly defined pattern restricted to the lower and middle cortical region of the hair shaft in both developing and cycling hair. During hair follicle regression (catagen), expression levels decrease until expression is no longer detectable in follicles at resting stage (telogen). Since isolation of the Krtap16 genes was based on their differential expression in transgenic mice overexpressing the Hoxc13 transcriptional regulator in hair, we examined whether bona fide Hoxc13 binding sites associated with these genes might be functionally relevant by performing electrophoretic mobility shift assays (EMSAs). The data provide evidence for sequence-specific interaction between Hoxc13 and Krtap16 genes, thus supporting the concept of a regulatory relationship between Hoxc13 and these KAP genes.
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Affiliation(s)
- Nathanael D Pruett
- Department of Medicine, Medical University of South Carolina, Charleston, South Carolina 29425, USA
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45
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Lang JM, Esser KA, Dupont-Versteegden EE. Altered activity of signaling pathways in diaphragm and tibialis anterior muscle of dystrophic mice. Exp Biol Med (Maywood) 2004; 229:503-11. [PMID: 15169969 DOI: 10.1177/153537020422900608] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Duchenne muscular dystrophy is a musculoskeletal disease caused by mutations in the dystrophin gene. The purpose of this study was to use the mouse model of muscular dystrophy (mdx) to determine if the progression of the dystrophic phenotype in the diaphragm (costal) versus limb skeletal muscle (tibialis anterior) is associated with specific changes in extracellular regulated kinase (ERK1/2), p70 S6 kinase (p70(S6k)), or p38 signaling pathways. The studies detected that consistent with an earlier dystrophic phenotype, phosphorylation of p70(S6k) is elevated by 40% in the diaphragm with no change in limb muscle. In addition, phosphorylation of p38 kinase was decreased by 33% in the mdx diaphragm muscle. Levels of ERK1/2 as well as phosphorylation states were elevated in the diaphragm and limb muscle of mdx mice compared with age-matched control muscles. These results indicate that distinct signaling pathways are differentially activated in skeletal muscle of mdx mice. The specificity of these responses, particularly in the diaphragm, provides insight for potential targets for blunting the progression of the muscular dystrophy phenotype.
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Affiliation(s)
- Joshua M Lang
- Muscle Biology Laboratory, School of Kinesiology, University of Illinois, Chicago, Illinois 60608, USA
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46
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Nakayama Y, Nara N, Kawakita Y, Takeshima Y, Arakawa M, Katoh M, Morita S, Iwatsuki K, Tanaka K, Okamoto S, Kitamura T, Seki N, Matsuda R, Matsuo M, Saito K, Hara T. Cloning of cDNA encoding a regeneration-associated muscle protease whose expression is attenuated in cell lines derived from Duchenne muscular dystrophy patients. THE AMERICAN JOURNAL OF PATHOLOGY 2004; 164:1773-82. [PMID: 15111323 PMCID: PMC1615663 DOI: 10.1016/s0002-9440(10)63735-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the dystrophin-mutant mdx mouse, an animal model for Duchenne muscular dystrophy (DMD), damaged skeletal muscles are efficiently regenerated and thus the animals thrive. The phenotypic differences between DMD patients and the mdx mice suggest the existence of factors that modulate the muscle wasting in the mdx mice. To identify these factors, we searched for mRNAs affected by the mdx mutation by using cDNA microarrays with newly established skeletal muscle cell lines from mdx and normal mice. We found that in the mdx muscle cell line, 12 genes, including L-arginine:glycine amidinotransferase and thymosin beta4, are up-regulated, whereas 7 genes, including selenoprotein P and a novel regeneration-associated muscle protease (RAMP), are down-regulated. Northern blot analysis and in situ hybridization revealed that RAMP mRNA is predominantly expressed in normal skeletal muscle and brain, and its production is enhanced in the regenerating area of injured skeletal muscle in mice. RAMP expression was much lower in individual muscle cell lines derived from biopsies of six DMD patients compared to a normal muscle cell line. These results suggest that RAMP may play a role in the regeneration of skeletal muscle and that its down-regulation could be involved in the progression of DMD in humans.
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MESH Headings
- Amino Acid Sequence
- Animals
- Biopsy
- Blotting, Northern
- Blotting, Western
- Cell Line
- Cell Line, Tumor
- Cloning, Molecular
- DNA, Complementary/chemistry
- DNA, Complementary/metabolism
- Disease Models, Animal
- Down-Regulation
- Dystrophin/metabolism
- Endopeptidases/genetics
- Humans
- Immunohistochemistry
- In Situ Hybridization
- Metalloendopeptidases/genetics
- Metalloendopeptidases/physiology
- Mice
- Mice, Inbred C57BL
- Mice, Inbred mdx
- Molecular Sequence Data
- Muscle, Skeletal/cytology
- Muscle, Skeletal/metabolism
- Muscle, Skeletal/pathology
- Muscles/enzymology
- Muscular Dystrophy, Duchenne/genetics
- Oligonucleotide Array Sequence Analysis
- RNA/metabolism
- RNA, Messenger/metabolism
- Regeneration
- Reverse Transcriptase Polymerase Chain Reaction
- Sequence Homology, Amino Acid
- Serine Proteases
- Transfection
- Up-Regulation
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Affiliation(s)
- Yuki Nakayama
- Department of Tumor Biochemistry, The Tokyo Metropolitan Institute of Medical Science, Tokyo Metropolitan Organization for Medical Research, Tokyo, Japan
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Abstract
Under normal circumstances, mammalian adult skeletal muscle is a stable tissue with very little turnover of nuclei. However, upon injury, skeletal muscle has the remarkable ability to initiate a rapid and extensive repair process preventing the loss of muscle mass. Skeletal muscle repair is a highly synchronized process involving the activation of various cellular responses. The initial phase of muscle repair is characterized by necrosis of the damaged tissue and activation of an inflammatory response. This phase is rapidly followed by activation of myogenic cells to proliferate, differentiate, and fuse leading to new myofiber formation and reconstitution of a functional contractile apparatus. Activation of adult muscle satellite cells is a key element in this process. Muscle satellite cell activation resembles embryonic myogenesis in several ways including the de novo induction of the myogenic regulatory factors. Signaling factors released during the regenerating process have been identified, but their functions remain to be fully defined. In addition, recent evidence supports the possible contribution of adult stem cells in the muscle regeneration process. In particular, bone marrow-derived and muscle-derived stem cells contribute to new myofiber formation and to the satellite cell pool after injury.
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48
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Sanoudou D, Kang PB, Haslett JN, Han M, Kunkel LM, Beggs AH. Transcriptional profile of postmortem skeletal muscle. Physiol Genomics 2004; 16:222-8. [PMID: 14625377 DOI: 10.1152/physiolgenomics.00137.2003] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Autopsy specimens are often used in molecular biological studies of disease pathophysiology. However, few analyses have focused specifically on postmortem changes in skeletal muscles, and almost all of those investigate protein or metabolic changes. Although some structural and enzymatic changes have been described, the sequence of transcriptional events associated with these remains unclear. We analyzed a series of new and preexisting human skeletal muscle data sets on ≃12,500 genes and expressed sequence tags (ESTs) generated by the Affymetrix U95Av2 GeneChips from seven autopsy and seven surgical specimens. Remarkably, postmortem specimens (up to 46 h) revealed a significant and prominent upregulation of transcripts involved with protein biosynthesis. Additional upregulated transcripts are associated with cellular responses to oxidative stress, hypoxia, and ischemia; however, only a subset of genes in these pathways was affected. Overexpression was also seen for apoptosis-related, cell cycle regulation/arrest-related, and signal transduction-related genes. No major gene expression differences were seen between autopsy specimens with <20-h and 34- to 46-h postmortem intervals or between pediatric and adult cases. These data demonstrate that, likely in response to hypoxia and oxidative stress, skeletal muscle undergoes a highly active transcriptional, and possibly, translational phase during the initial 46-h postmortem interval. Knowledge of these changes is important for proper interpretation of gene expression studies utilizing autopsy specimens.
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Affiliation(s)
- Despina Sanoudou
- Genetics Division and Genomics Program, Boston, Massachusetts 02115, USA
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49
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Porter JD, Merriam AP, Leahy P, Gong B, Feuerman J, Cheng G, Khanna S. Temporal gene expression profiling of dystrophin-deficient (mdx) mouse diaphragm identifies conserved and muscle group-specific mechanisms in the pathogenesis of muscular dystrophy. Hum Mol Genet 2003; 13:257-69. [PMID: 14681298 DOI: 10.1093/hmg/ddh033] [Citation(s) in RCA: 102] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Mutations in dystrophin are the proximate cause of Duchenne muscular dystrophy (DMD), but pathogenic mechanisms linking the absence of dystrophin from the sarcolemma to myofiber necrosis are not fully known. The muscular dystrophies also have properties not accounted for by current disease models, including the temporal delay to disease onset, broad species differences in severity, and diversity of skeletal muscle responses. To address the mechanisms underlying the differential targeting of muscular dystrophy, we characterized temporal expression profiles of the diaphragm in dystrophin-deficient (mdx) mice between postnatal days 7 and 112 using oligonucleotide microarrays and contrasted these data with published hindlimb muscle data. Although the diaphragm and hindlimb muscle groups differ in severity of response to dystrophin deficiency, and exhibited substantial divergence in some transcript categories including inflammation and muscle-specific genes, our data show that the general mechanisms operative in muscular dystrophy are highly conserved. The two muscle groups principally differed in expression levels of differentially regulated genes, as opposed to the non-conserved induced/repressed transcripts defining fundamentally distinct mechanisms. We also identified a postnatal divergence of the two wild-type muscle group expression profiles that temporally correlated with the onset and progression of the dystrophic process. These findings support the hypothesis that conserved disease mechanisms interacting with baseline differences in muscle group-specific transcriptomes underlie their differential responses to DMD. We further suggest that muscle group-specific transcriptional profiles contribute toward the muscle targeting and sparing patterns observed for a variety of metabolic and neuromuscular diseases.
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Affiliation(s)
- John D Porter
- Department of Neurology, Case Western Reserve University and University Hospitals of Cleveland, 11100 Euclid Avenue, Cleveland, OH 44106, USA.
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50
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Porter JD, Merriam AP, Leahy P, Gong B, Khanna S. Dissection of temporal gene expression signatures of affected and spared muscle groups in dystrophin-deficient (mdx) mice. Hum Mol Genet 2003; 12:1813-21. [PMID: 12874102 DOI: 10.1093/hmg/ddg197] [Citation(s) in RCA: 100] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Although dystrophin mutations are the proximate cause of Duchenne muscular dystrophy (DMD), interactions among heterogeneous downstream mechanisms may be key phenotypic determinants. Temporal gene expression profiling was used to identify and correlate diverse transcriptional patterns to one another and to the disease course, for both affected and spared muscle groups, in postnatal day 7-112 dystrophin-deficient (mdx) mice. While 719 transcripts were differentially expressed at one or more ages in leg muscle, only 56 genes were altered in the spared extraocular muscles (EOM). Contrasting molecular signatures of affected versus spared muscles provide compelling evidence that the absence of dystrophin alone is necessary but not sufficient to cause the patterned fibrosis, inflammation and failure of muscle regeneration characteristic of dystrophinopathy. Dystrophic and adaptive changes in the microarray profiles were further quantified using an aggregate disease load index (DLI) to measure stage-dependent transcriptional impact in both muscles. DLI analysis highlighted the divergent responses of EOM and leg muscle groups. Cellular process-specific DLIs in leg muscle identified positively correlated temporal expression profiles for some gene classes, and the independence of others, that are linked to major disease components. Data also showed a previously unrecognized transient and selective developmental delay in pre-necrotic mdx skeletal muscle that was confirmed by qPCR. Taken together, validation and targeting of signaling pathways responsible for the coordination of the fibrotic, proteolytic and inflammatory mechanisms shown here for mdx muscle may yield new therapeutic means of mitigating the devastating consequences of DMD.
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Affiliation(s)
- John D Porter
- Department of Ophthalmology, Case Western Reserve University and University Hospitals of Cleveland, 11100 Euclid Avenue, Cleveland, OH 44106, USA.
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