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Helzer D, Kannan P, Reynolds JC, Gibbs DE, Crosbie RH. Role of microenvironment on muscle stem cell function in health, adaptation, and disease. Curr Top Dev Biol 2024; 158:179-201. [PMID: 38670705 DOI: 10.1016/bs.ctdb.2024.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/28/2024]
Abstract
The role of the cellular microenvironment has recently gained attention in the context of muscle health, adaption, and disease. Emerging evidence supports major roles for the extracellular matrix (ECM) in regeneration and the dynamic regulation of the satellite cell niche. Satellite cells normally reside in a quiescent state in healthy muscle, but upon muscle injury, they activate, proliferate, and fuse to the damaged fibers to restore muscle function and architecture. This chapter reviews the composition and mechanical properties of skeletal muscle ECM and the role of these factors in contributing to the satellite cell niche that impact muscle regeneration. In addition, the chapter details the effects of satellite cell-matrix interactions and provides evidence that there is bidirectional regulation affecting both the cellular and extracellular microenvironment within skeletal muscle. Lastly, emerging methods to investigate satellite cell-matrix interactions will be presented.
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Affiliation(s)
- Daniel Helzer
- Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, CA, United States
| | - Pranav Kannan
- Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, CA, United States
| | - Joseph C Reynolds
- Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, CA, United States
| | - Devin E Gibbs
- Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, CA, United States; Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, United States
| | - Rachelle H Crosbie
- Department of Integrative Biology and Physiology, University of California, Los Angeles, Los Angeles, CA, United States; Molecular Biology Institute, University of California, Los Angeles, Los Angeles, CA, United States; Eli and Edythe Broad Center of Regenerative Medicine and Stem Cell Research, University of California, Los Angeles, Los Angeles, CA, United States; Department of Neurology, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA, United States.
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Kodippili K, Rudnicki MA. Satellite cell contribution to disease pathology in Duchenne muscular dystrophy. Front Physiol 2023; 14:1180980. [PMID: 37324396 PMCID: PMC10266354 DOI: 10.3389/fphys.2023.1180980] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Accepted: 05/23/2023] [Indexed: 06/17/2023] Open
Abstract
Progressive muscle weakness and degeneration characterize Duchenne muscular dystrophy (DMD), a lethal, x-linked neuromuscular disorder that affects 1 in 5,000 boys. Loss of dystrophin protein leads to recurrent muscle degeneration, progressive fibrosis, chronic inflammation, and dysfunction of skeletal muscle resident stem cells, called satellite cells. Unfortunately, there is currently no cure for DMD. In this mini review, we discuss how satellite cells in dystrophic muscle are functionally impaired, and how this contributes to the DMD pathology, and the tremendous potential of restoring endogenous satellite cell function as a viable treatment strategy to treat this debilitating and fatal disease.
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Affiliation(s)
- Kasun Kodippili
- The Sprott Centre for Stem Cell Research, Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Michael A. Rudnicki
- The Sprott Centre for Stem Cell Research, Regenerative Medicine Program, Ottawa Hospital Research Institute, Ottawa, ON, Canada
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, ON, Canada
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3
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Den Hartog L, Asakura A. Implications of notch signaling in duchenne muscular dystrophy. Front Physiol 2022; 13:984373. [PMID: 36237531 PMCID: PMC9553129 DOI: 10.3389/fphys.2022.984373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 09/05/2022] [Indexed: 11/13/2022] Open
Abstract
This review focuses upon the implications of the Notch signaling pathway in muscular dystrophies, particularly Duchenne muscular dystrophy (DMD): a pervasive and catastrophic condition concerned with skeletal muscle degeneration. Prior work has defined the pathogenesis of DMD, and several therapeutic approaches have been undertaken in order to regenerate skeletal muscle tissue and ameliorate the phenotype. There is presently no cure for DMD, but a promising avenue for novel therapies is inducing muscle regeneration via satellite cells (muscle stem cells). One specific target using this approach is the Notch signaling pathway. The canonical Notch signaling pathway has been well-characterized and it ultimately governs cell fate decision, cell proliferation, and induction of differentiation. Additionally, inhibition of the Notch signaling pathway has been directly implicated in the deficits seen with muscular dystrophies. Here, we explore the connection between the Notch signaling pathway and DMD, as well as how Notch signaling may be targeted to improve the muscle degeneration seen in muscular dystrophies.
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Barutcu AR, Elizalde G, Gonzalez AE, Soni K, Rinn JL, Wagers AJ, Almada AE. Prolonged FOS activity disrupts a global myogenic transcriptional program by altering 3D chromatin architecture in primary muscle progenitor cells. Skelet Muscle 2022; 12:20. [PMID: 35971133 PMCID: PMC9377060 DOI: 10.1186/s13395-022-00303-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Accepted: 08/04/2022] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The AP-1 transcription factor, FBJ osteosarcoma oncogene (FOS), is induced in adult muscle satellite cells (SCs) within hours following muscle damage and is required for effective stem cell activation and muscle repair. However, why FOS is rapidly downregulated before SCs enter cell cycle as progenitor cells (i.e., transiently expressed) remains unclear. Further, whether boosting FOS levels in the proliferating progeny of SCs can enhance their myogenic properties needs further evaluation. METHODS We established an inducible, FOS expression system to evaluate the impact of persistent FOS activity in muscle progenitor cells ex vivo. We performed various assays to measure cellular proliferation and differentiation, as well as uncover changes in RNA levels and three-dimensional (3D) chromatin interactions. RESULTS Persistent FOS activity in primary muscle progenitor cells severely antagonizes their ability to differentiate and form myotubes within the first 2 weeks in culture. RNA-seq analysis revealed that ectopic FOS activity in muscle progenitor cells suppressed a global pro-myogenic transcriptional program, while activating a stress-induced, mitogen-activated protein kinase (MAPK) transcriptional signature. Additionally, we observed various FOS-dependent, chromosomal re-organization events in A/B compartments, topologically associated domains (TADs), and genomic loops near FOS-regulated genes. CONCLUSIONS Our results suggest that elevated FOS activity in recently activated muscle progenitor cells perturbs cellular differentiation by altering the 3D chromosome organization near critical pro-myogenic genes. This work highlights the crucial importance of tightly controlling FOS expression in the muscle lineage and suggests that in states of chronic stress or disease, persistent FOS activity in muscle precursor cells may disrupt the muscle-forming process.
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Affiliation(s)
- A Rasim Barutcu
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
- Present address: Donnelly Centre, University of Toronto, Toronto, ON, Canada
| | - Gabriel Elizalde
- Department of Orthopaedic Surgery, University of Southern California, Los Angeles, CA, USA
- Department of Stem Cell Biology and Regenerative Medicine, University of Southern California, Los Angeles, CA, USA
| | - Alfredo E Gonzalez
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
| | - Kartik Soni
- Department of Orthopaedic Surgery, University of Southern California, Los Angeles, CA, USA
- Department of Stem Cell Biology and Regenerative Medicine, University of Southern California, Los Angeles, CA, USA
| | - John L Rinn
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
- Present address: BioFrontiers and Department of Biochemistry, University of Colorado Boulder, Boulder, CO, 80303, USA
| | - Amy J Wagers
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA
| | - Albert E Almada
- Department of Stem Cell and Regenerative Biology, Harvard University, Cambridge, MA, USA.
- Department of Orthopaedic Surgery, University of Southern California, Los Angeles, CA, USA.
- Department of Stem Cell Biology and Regenerative Medicine, University of Southern California, Los Angeles, CA, USA.
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Addicks GC, Zhang H, Ryu D, Vasam G, Green AE, Marshall PL, Patel S, Kang BE, Kim D, Katsyuba E, Williams EG, Renaud JM, Auwerx J, Menzies KJ. GCN5 maintains muscle integrity by acetylating YY1 to promote dystrophin expression. J Cell Biol 2022; 221:e202104022. [PMID: 35024765 PMCID: PMC8931935 DOI: 10.1083/jcb.202104022] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 11/04/2021] [Accepted: 12/08/2021] [Indexed: 12/12/2022] Open
Abstract
Protein lysine acetylation is a post-translational modification that regulates protein structure and function. It is targeted to proteins by lysine acetyltransferases (KATs) or removed by lysine deacetylases. This work identifies a role for the KAT enzyme general control of amino acid synthesis protein 5 (GCN5; KAT2A) in regulating muscle integrity by inhibiting DNA binding of the transcription factor/repressor Yin Yang 1 (YY1). Here we report that a muscle-specific mouse knockout of GCN5 (Gcn5skm-/-) reduces the expression of key structural muscle proteins, including dystrophin, resulting in myopathy. GCN5 was found to acetylate YY1 at two residues (K392 and K393), disrupting the interaction between the YY1 zinc finger region and DNA. These findings were supported by human data, including an observed negative correlation between YY1 gene expression and muscle fiber diameter. Collectively, GCN5 positively regulates muscle integrity through maintenance of structural protein expression via acetylation-dependent inhibition of YY1. This work implicates the role of protein acetylation in the regulation of muscle health and for consideration in the design of novel therapeutic strategies to support healthy muscle during myopathy or aging.
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Affiliation(s)
- Gregory C Addicks
- Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Hongbo Zhang
- Key Laboratory for Stem Cells and Tissue Engineering, Ministry of Education, Department of Histology and Embryology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, China
- Laboratory of Integrative Systems Physiology, École polytechnique fédérale de Lausanne, Lausanne, Switzerland
| | - Dongryeol Ryu
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, South Korea
| | - Goutham Vasam
- Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Alexander E Green
- Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
- Ottawa Institute of Systems Biology and the Éric Poulin Centre for Neuromuscular Disease, Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Philip L Marshall
- Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Sonia Patel
- Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
| | - Baeki E Kang
- Department of Molecular Cell Biology, Sungkyunkwan University School of Medicine, Suwon, South Korea
| | - Doyoun Kim
- Division of Therapeutics and Biotechnology, Korea Research Institute of Chemical Technology, Daejeon, South Korea
| | - Elena Katsyuba
- Laboratory of Integrative Systems Physiology, École polytechnique fédérale de Lausanne, Lausanne, Switzerland
| | - Evan G Williams
- Luxembourg Centre for Systems Biomedicine, University of Luxembourg, Esch-sur-Alzette, Luxembourg
| | - Jean-Marc Renaud
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | - Johan Auwerx
- Laboratory of Integrative Systems Physiology, École polytechnique fédérale de Lausanne, Lausanne, Switzerland
| | - Keir J Menzies
- Interdisciplinary School of Health Sciences, Faculty of Health Sciences, University of Ottawa, Ottawa, Ontario, Canada
- Ottawa Institute of Systems Biology and the Éric Poulin Centre for Neuromuscular Disease, Department of Biochemistry, Microbiology and Immunology, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
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6
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Nigam K, Srivastav RK. Notch signaling in oral pre-cancer and oral cancer. Med Oncol 2021; 38:139. [PMID: 34633549 DOI: 10.1007/s12032-021-01593-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Accepted: 09/29/2021] [Indexed: 10/20/2022]
Abstract
Notch signaling involves cell to cell contact. It is an ancient signaling mechanism that is conserved throughout the animal kingdom. The basic function of Notch signaling is to decide cell fate and execute asymmetrical division. Notch signaling is indispensable for embryo growth. Aberrant Notch signaling involves in cancer progression by altering cell proliferation rate, tumor micro-environment, stem cell activities. The role of Notch signaling in cancer progression is context-dependent. In breast cancer and T cell lymphoma Notch signaling is highly active, whereas in squamous cell carcinoma (SCC) as oral and skin cancer, the signaling is suppressed. It is believed that in SCC, Notch-mediated tumor growth is due to the cell non-autonomous function. Oral cancer is the 6th most risky cancer worldwide. In many patients, oral cancer is preceded by pre-cancer conditions. In this review, we have summarized the research knowledge related to the role of Notch signaling in oral cancer and pre-cancer conditions and the therapeutic options available targeting different components of Notch pathways.
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Affiliation(s)
- Kumud Nigam
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, Lucknow Campus, Lucknow, 226028, Uttar Pradesh, India
| | - Ratnesh Kumar Srivastav
- Department of Oral Pathology & Microbiology, King George's Medical University, Lucknow, Uttar Pradesh, 226003, India.
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Sadler KJ, Gatta PAD, Naim T, Wallace MA, Lee A, Zaw T, Lindsay A, Chung RS, Bello L, Pegoraro E, Lamon S, Lynch GS, Russell AP. Striated muscle activator of Rho signalling (STARS) overexpression in the mdx mouse enhances muscle functional capacity and regulates the actin cytoskeleton and oxidative phosphorylation pathways. Exp Physiol 2021; 106:1597-1611. [PMID: 33963617 DOI: 10.1113/ep089253] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Accepted: 05/04/2021] [Indexed: 11/08/2022]
Abstract
NEW FINDINGS What is the central question of this study? Striated muscle activator of rho signalling (STARS) is an actin-binding protein that regulates transcriptional pathways controlling muscle function, growth and myogenesis, processes that are impaired in dystrophic muscle: what is the regulation of the STARS pathway in Duchenne muscular dystrophy (DMD)? What is the main finding and its importance? Members of the STARS signalling pathway are reduced in the quadriceps of patients with DMD and in mouse models of muscular dystrophy. Overexpression of STARS in the dystrophic deficient mdx mouse model increased maximal isometric specific force and upregulated members of the actin cytoskeleton and oxidative phosphorylation pathways. Regulating STARS may be a therapeutic approach to enhance muscle health. ABSTRACT Duchenne muscular dystrophy (DMD) is characterised by impaired cytoskeleton organisation, cytosolic calcium handling, oxidative stress and mitochondrial dysfunction. This results in progressive muscle damage, wasting and weakness and premature death. The striated muscle activator of rho signalling (STARS) is an actin-binding protein that activates the myocardin-related transcription factor-A (MRTFA)/serum response factor (SRF) transcriptional pathway, a pathway regulating cytoskeletal structure and muscle function, growth and repair. We investigated the regulation of the STARS pathway in the quadriceps muscle from patients with DMD and in the tibialis anterior (TA) muscle from the dystrophin-deficient mdx and dko (utrophin and dystrophin null) mice. Protein levels of STARS, SRF and RHOA were reduced in patients with DMD. STARS, SRF and MRTFA mRNA levels were also decreased in DMD muscle, while Stars mRNA levels were decreased in the mdx mice and Srf and Mrtfa mRNAs decreased in the dko mice. Overexpressing human STARS (hSTARS) in the TA muscles of mdx mice increased maximal isometric specific force by 13% (P < 0.05). This was not associated with changes in muscle mass, fibre cross-sectional area, fibre type, centralised nuclei or collagen deposition. Proteomics screening followed by pathway enrichment analysis identified that hSTARS overexpression resulted in 31 upregulated and 22 downregulated proteins belonging to the actin cytoskeleton and oxidative phosphorylation pathways. These pathways are impaired in dystrophic muscle and regulate processes that are vital for muscle function. Increasing the STARS protein in dystrophic muscle improves muscle force production, potentially via synergistic regulation of cytoskeletal structure and energy production.
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Affiliation(s)
- Kate J Sadler
- Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Deakin University, Geelong, Victoria, Australia
| | - Paul A Della Gatta
- Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Deakin University, Geelong, Victoria, Australia
| | - Timur Naim
- Department of Physiology, Centre for Muscle Research, University of Melbourne, Parkville, Victoria, Australia
| | - Marita A Wallace
- Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Deakin University, Geelong, Victoria, Australia
| | - Albert Lee
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Centre for Motor Neuron Disease Research, Macquarie University, Sydney, New South Wales, Australia
| | - Thiri Zaw
- Australian Proteome Analysis Facility, Macquarie University, Sydney, New South Wales, Australia
| | - Angus Lindsay
- Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Deakin University, Geelong, Victoria, Australia
| | - Roger S Chung
- Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Centre for Motor Neuron Disease Research, Macquarie University, Sydney, New South Wales, Australia
| | - Luca Bello
- Department of Neurosciences, ERN Neuromuscular Center, University of Padua, Padua, Italy
| | - Elena Pegoraro
- Department of Neurosciences, ERN Neuromuscular Center, University of Padua, Padua, Italy
| | - Séverine Lamon
- Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Deakin University, Geelong, Victoria, Australia
| | - Gordon S Lynch
- Department of Physiology, Centre for Muscle Research, University of Melbourne, Parkville, Victoria, Australia
| | - Aaron P Russell
- Institute for Physical Activity and Nutrition (IPAN), School of Exercise and Nutrition Sciences, Deakin University, Geelong, Victoria, Australia
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Porcheri C, Meisel CT, Mitsiadis T. Multifactorial Contribution of Notch Signaling in Head and Neck Squamous Cell Carcinoma. Int J Mol Sci 2019; 20:ijms20061520. [PMID: 30917608 PMCID: PMC6471940 DOI: 10.3390/ijms20061520] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 03/21/2019] [Accepted: 03/22/2019] [Indexed: 12/20/2022] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) defines a group of solid tumors originating from the mucosa of the upper aerodigestive tract, pharynx, larynx, mouth, and nasal cavity. It has a metastatic evolution and poor prognosis and is the sixth most common cancer in the world, with 600,000 new cases reported every year. HNSCC heterogeneity and complexity is reflected in a multistep progression, involving crosstalk between several molecular pathways. The Notch pathway is associated with major events supporting cancerogenic evolution: cell proliferation, self-renewal, angiogenesis, and preservation of a pro-oncogenic microenvironment. Additionally, Notch is pivotal in tumor development and plays a dual role acting as both oncogene and tumor suppressor. In this review, we summarize the role of the Notch pathway in HNSCC, with a special focus on its compelling role in major events of tumor initiation and growth.
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Affiliation(s)
- Cristina Porcheri
- University of Zurich, Institute of Oral Biology, Plattenstrasse 11, CH-8032 Zurich, Switzerland.
| | - Christian Thomas Meisel
- University of Zurich, Institute of Oral Biology, Plattenstrasse 11, CH-8032 Zurich, Switzerland.
| | - Thimios Mitsiadis
- University of Zurich, Institute of Oral Biology, Plattenstrasse 11, CH-8032 Zurich, Switzerland.
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Cho Y, Tachibana S, Hazen BC, Moresco JJ, Yates JR, Kok B, Saez E, Ross RS, Russell AP, Kralli A. Perm1 regulates CaMKII activation and shapes skeletal muscle responses to endurance exercise training. Mol Metab 2019; 23:88-97. [PMID: 30862473 PMCID: PMC6480336 DOI: 10.1016/j.molmet.2019.02.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 02/15/2019] [Accepted: 02/24/2019] [Indexed: 12/14/2022] Open
Abstract
Objective Endurance exercise training remodels skeletal muscle, leading to increased mitochondrial content and oxidative capacity. How exercise entrains skeletal muscle signaling pathways to induce adaptive responses remains unclear. In past studies, we identified Perm1 (PGC-1 and ERR induced regulator, muscle 1) as an exercise-induced gene and showed that Perm1 overexpression elicits similar muscle adaptations as endurance exercise training. The mechanism of action and the role of Perm1 in exercise-induced responses are not known. In this study, we aimed to determine the pathway by which Perm1 acts as well as the importance of Perm1 for acute and long-term responses to exercise. Methods We performed immunoprecipitation and mass spectrometry to identify Perm1 associated proteins, and validated Perm1 interactions with the Ca2+/calmodulin-dependent protein kinase II (CaMKII). We also knocked down Perm1 expression in gastrocnemius muscles of mice via AAV-mediated delivery of shRNA and assessed the impact of reduced Perm1 expression on both acute molecular responses to a single treadmill exercise bout and long-term adaptive responses to four weeks of voluntary wheel running training. Finally, we asked whether Perm1 levels are modulated by diet or diseases affecting skeletal muscle function. Results We show that Perm1 associates with skeletal muscle CaMKII and promotes CaMKII activation. In response to an acute exercise bout, muscles with a knock down of Perm1 showed defects in the activation of CaMKII and p38 MAPK and blunted induction of regulators of oxidative metabolism. Following four weeks of voluntary training, Perm1 knockdown muscles had attenuated mitochondrial biogenesis. Finally, we found that Perm1 expression is reduced in diet-induced obese mice and in muscular dystrophy patients and mouse models. Conclusions Our findings identify Perm1 as a muscle-specific regulator of exercise-induced signaling and Perm1 levels as tuners of the skeletal muscle response to exercise. The decreased Perm1 levels in states of obesity or muscle disease suggest that Perm1 may link pathological states to inefficient exercise responses. Perm1 interacts with CaMKII and activates the CaMKII-MEF2 pathway. Perm1 is important for CaMKII activation and PGC-1α induction by an exercise bout. In endurance training, Perm1 impacts muscle oxidative metabolism pathway responses. Skeletal muscle levels of Perm1 are reduced in obesity and muscular dystrophy.
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Affiliation(s)
- Yoshitake Cho
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, CA, 92037, USA; Division of Cardiology, Department of Medicine, University of California San Diego, La Jolla, CA, 92093, USA.
| | - Shizuko Tachibana
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, CA, 92037, USA; Division of Cardiology, Department of Medicine, University of California San Diego, La Jolla, CA, 92093, USA
| | - Bethany C Hazen
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - James J Moresco
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, CA, 92037, USA; Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - John R Yates
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, CA, 92037, USA; Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Bernard Kok
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, CA, 92037, USA; Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Enrique Saez
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, CA, 92037, USA; Department of Molecular Medicine, The Scripps Research Institute, La Jolla, CA, 92037, USA
| | - Robert S Ross
- Division of Cardiology, Department of Medicine, University of California San Diego, La Jolla, CA, 92093, USA
| | - Aaron P Russell
- Institute for Physical Activity and Nutrition, School of Exercise and Nutrition Sciences, Deakin University, Geelong, Australia
| | - Anastasia Kralli
- Department of Chemical Physiology, The Scripps Research Institute, La Jolla, CA, 92037, USA; Department of Physiology, Johns Hopkins University, Baltimore, MD, 21205, USA.
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10
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Prince LM, Rand MD. Methylmercury exposure causes a persistent inhibition of myogenin expression and C2C12 myoblast differentiation. Toxicology 2018; 393:113-122. [PMID: 29104120 PMCID: PMC5757876 DOI: 10.1016/j.tox.2017.11.002] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Revised: 10/03/2017] [Accepted: 11/01/2017] [Indexed: 12/11/2022]
Abstract
Methylmercury (MeHg) is a ubiquitous environmental toxicant, best known for its selective targeting of the developing nervous system. MeHg exposure has been shown to cause motor deficits such as impaired gait and coordination, muscle weakness, and muscle atrophy, which have been associated with disruption of motor neurons. However, recent studies have suggested that muscle may also be a target of MeHg toxicity, both in the context of developmental myogenic events and of low-level chronic exposures affecting muscle wasting in aging. We therefore investigated the effects of MeHg on myotube formation, using the C2C12 mouse myoblast model. We found that MeHg inhibits both differentiation and fusion, in a concentration-dependent manner. Furthermore, MeHg specifically and persistently inhibits myogenin (MyoG), a transcription factor involved in myocyte differentiation, within the first six hours of exposure. MeHg-induced reduction in MyoG expression is contemporaneous with a reduction of a number of factors involved in mitochondrial biogenesis and mtDNA transcription and translation, which may implicate a role for mitochondria in mediating MeHg-induced change in the differentiation program. Unexpectedly, inhibition of myoblast differentiation with MeHg parallels inhibition of Notch receptor signaling. Our research establishes muscle cell differentiation as a target for MeHg toxicity, which may contribute to the underlying etiology of motor deficits with MeHg toxicity.
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Affiliation(s)
- Lisa M Prince
- University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Department of Environmental Medicine, Rochester, NY, 14642, USA.
| | - Matthew D Rand
- University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Department of Environmental Medicine, Rochester, NY, 14642, USA.
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11
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Welch RD, Billon C, Valfort AC, Burris TP, Flaveny CA. Pharmacological inhibition of REV-ERB stimulates differentiation, inhibits turnover and reduces fibrosis in dystrophic muscle. Sci Rep 2017; 7:17142. [PMID: 29215066 PMCID: PMC5719458 DOI: 10.1038/s41598-017-17496-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 11/27/2017] [Indexed: 12/21/2022] Open
Abstract
Duchenne muscular dystrophy (DMD) is a debilitating X-linked disorder that is fatal. DMD patients lack the expression of the structural protein dystrophin caused by mutations within the DMD gene. The absence of functional dystrophin protein results in excessive damage from normal muscle use due to the compromised structural integrity of the dystrophin associated glycoprotein complex. As a result, DMD patients exhibit ongoing cycles of muscle destruction and regeneration that promote inflammation, fibrosis, mitochondrial dysfunction, satellite cell (SC) exhaustion and loss of skeletal and cardiac muscle function. The nuclear receptor REV-ERB suppresses myoblast differentiation and recently we have demonstrated that the REV-ERB antagonist, SR8278, stimulates muscle regeneration after acute injury. Therefore, we decided to explore whether the REV-ERB antagonist SR8278 could slow the progression of muscular dystrophy. In mdx mice SR8278 increased lean mass and muscle function, and decreased muscle fibrosis and muscle protein degradation. Interestingly, we also found that SR8278 increased the SC pool through stimulation of Notch and Wnt signaling. These results suggest that REV-ERB is a potent target for the treatment of DMD.
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Affiliation(s)
- Ryan D Welch
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, MO, 63104, USA
| | - Cyrielle Billon
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, MO, 63104, USA
| | - Aurore-Cecile Valfort
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, MO, 63104, USA
| | - Thomas P Burris
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, MO, 63104, USA
| | - Colin A Flaveny
- Department of Pharmacology and Physiology, Saint Louis University School of Medicine, Saint Louis, MO, 63104, USA.
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12
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Nagata Y, Kiyono T, Okamura K, Goto YI, Matsuo M, Ikemoto-Uezumi M, Hashimoto N. Interleukin-1beta (IL-1β)-induced Notch ligand Jagged1 suppresses mitogenic action of IL-1β on human dystrophic myogenic cells. PLoS One 2017; 12:e0188821. [PMID: 29194448 PMCID: PMC5711031 DOI: 10.1371/journal.pone.0188821] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2017] [Accepted: 11/14/2017] [Indexed: 11/17/2022] Open
Abstract
Duchenne muscular dystrophy (DMD) is a severe X-linked recessive muscle disorder caused by mutations in the dystrophin gene. Nonetheless, secondary processes involving perturbation of muscle regeneration probably exacerbate disease progression, resulting in the fatal loss of muscle in DMD patients. A dysfunction of undifferentiated myogenic cells is the most likely cause for the reduction of regenerative capacity of muscle. To clarify molecular mechanisms in perturbation of the regenerative capacity of DMD muscle, we have established several NCAM (CD56)-positive immortalized human dystrophic and non-dystrophic myogenic cell lines from DMD and healthy muscles. A pro-inflammatory cytokine, IL-1β, promoted cell cycle progression of non-dystrophic myogenic cells but not DMD myogenic cells. In contrast, IL-1β upregulated the Notch ligand Jagged1 gene in DMD myogenic cells but not in non-dystrophic myogenic cells. Knockdown of Jagged1 in DMD myogenic cells restored the IL-1β-promoted cell cycle progression. Conversely, enforced expression of Jagged1-blocked IL-1β promoted proliferation of non-dystrophic myogenic cells. In addition, IL-1β prevented myogenic differentiation of DMD myogenic cells depending on Jagged1 but not of non-dystrophic myogenic cells. These results demonstrate that Jagged1 induced by IL-1β in DMD myogenic cells modified the action of IL-1β and reduced the ability to proliferate and differentiate. IL-1β induced Jagged1 gene expression may be a feedback response to excess stimulation with this cytokine because high IL-1β (200-1000 pg/ml) induced Jagged1 gene expression even in non-dystrophic myogenic cells. DMD myogenic cells are likely to acquire the susceptibility of the Jagged1 gene to IL-1β under the microcircumstances in DMD muscles. The present results suggest that Jagged1 induced by IL-1β plays a crucial role in the loss of muscle regeneration capacity of DMD muscles. The IL-1β/Jagged1 pathway may be a new therapeutic target to ameliorate exacerbation of muscular dystrophy in a dystrophin-independent manner.
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Affiliation(s)
- Yuki Nagata
- Department of Regenerative Medicine, National Center for Geriatrics and Gerontology, Morioka, Oobu, Aichi, Japan
| | - Tohru Kiyono
- Division of Carcinogenesis and Cancer Prevention, National Cancer Center Research Institute, Tsukiji, Chuo-ku, Tokyo, Japan
| | - Kikuo Okamura
- Department of Urology, National Center for Geriatrics and Gerontology, Morioka, Oobu, Aichi, Japan
| | - Yu-ichi Goto
- Department of Mental Retardation and Birth Defect Research, National Institute of Neuroscience, Nervous, and Muscular Disorders, National Center of Neurology and Psychiatry,Ogawahigashi, Kodaira, Tokyo, Japan
| | - Masafumi Matsuo
- Department of Medical Rehabilitation, Faculty of Rehabilitation, Kobegakuin University, Ikawadani-cho, Nishi-ku, Kobe Japan
| | - Madoka Ikemoto-Uezumi
- Department of Regenerative Medicine, National Center for Geriatrics and Gerontology, Morioka, Oobu, Aichi, Japan
| | - Naohiro Hashimoto
- Department of Regenerative Medicine, National Center for Geriatrics and Gerontology, Morioka, Oobu, Aichi, Japan
- * E-mail:
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13
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de Carvalho SC, Hindi SM, Kumar A, Marques MJ. Effects of omega-3 on matrix metalloproteinase-9, myoblast transplantation and satellite cell activation in dystrophin-deficient muscle fibers. Cell Tissue Res 2017. [PMID: 28623422 DOI: 10.1007/s00441-017-2640-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
In Duchenne muscular dystrophy (DMD), lack of dystrophin leads to progressive muscle degeneration, with DMD patients suffering from cardiorespiratory failure. Cell therapy is an alternative to life-long corticoid therapy. Satellite cells, the stem cells of skeletal muscles, do not completely compensate for the muscle damage in dystrophic muscles. Elevated levels of proinflammatory and profibrotic factors, such as metalloproteinase 9 (MMP-9), impair muscle regeneration, leading to extensive fibrosis and poor results with myoblast transplantation therapies. Omega-3 is an anti-inflammatory drug that protects against muscle degeneration in the mdx mouse model of DMD. In the present study, we test our hypothesis that omega-3 affects MMP-9 and thereby benefits muscle regeneration and myoblast transplantation in the mdx mouse. We observe that omega-3 reduces MMP-9 gene expression and improves myoblast engraftment, satellite cell activation, and muscle regeneration by mechanisms involving, at least in part, the regulation of macrophages, as shown here with the fluorescence-activated cell sorting technique. The present study demonstrates the benefits of omega-3 on satellite cell survival and muscle regeneration, further supporting its use in clinical trials and cell therapies in DMD.
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Affiliation(s)
- Samara Camaçari de Carvalho
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas, UNICAMP, Campinas, SP, CEP 1083-970, Brazil
| | - Sajedah M Hindi
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY, USA
| | - Ashok Kumar
- Department of Anatomical Sciences and Neurobiology, University of Louisville School of Medicine, Louisville, KY, USA
| | - Maria Julia Marques
- Department of Structural and Functional Biology, Institute of Biology, University of Campinas, UNICAMP, Campinas, SP, CEP 1083-970, Brazil.
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14
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Abreu P, Pinheiro CHJ, Vitzel KF, Vasconcelos DAA, Torres RP, Fortes MS, Marzuca-Nassr GN, Mancini-Filho J, Hirabara SM, Curi R. Contractile function recovery in severely injured gastrocnemius muscle of rats treated with either oleic or linoleic acid. Exp Physiol 2016; 101:1392-1405. [PMID: 27579497 DOI: 10.1113/ep085899] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Accepted: 08/18/2016] [Indexed: 12/31/2022]
Abstract
NEW FINDINGS What is the central question of this study? Oleic and linoleic acids modulate fibroblast proliferation and myogenic differentiation in vitro. However, their in vivo effects on muscle regeneration have not yet been examined. We investigated the effects of either oleic or linoleic acid on a well-established model of muscle regeneration after severe laceration. What is the main finding and its importance? We found that linoleic acid increases fibrous tissue deposition and impairs muscle regeneration and recovery of contractile function, whereas oleic acid has the opposite effects in severely injured gastrocnemius muscle, suggesting that linoleic acid has a harmful effect and oleic acid a potential therapeutic effect on muscle regeneration. Oleic and linoleic acids control fibroblast proliferation and myogenic differentiation in vitro; however, there was no study in skeletal muscle in vivo. The aim of this study was to evaluate the effects of either oleic or linoleic acid on the fibrous tissue content (collagen deposition) of muscle and recovery of contractile function in rat gastrocnemius muscle after being severely injured by laceration. Rats were supplemented with either oleic or linoleic acid for 4 weeks after laceration [0.44 g (kg body weight)-1 day-1 ]. Muscle injury led to an increase in oleic-to-stearic acid and palmitoleic-to-palmitic acid ratios, suggesting an increase in Δ9 desaturase activity. Increased fibrous tissue deposition and reduced isotonic and tetanic specific forces and resistance to fatigue were observed in the injured muscle. Supplementation with linoleic acid increased the content of eicosadienoic (20:2, n-6) and arachidonic (20:4, n-6) acids, reduced muscle mass and fibre cross-sectional areas, increased fibrous tissue deposition and further reduced the isotonic and tetanic specific forces and resistance to fatigue induced by laceration. Supplementation with oleic acid increased the content of docosahexaenoic acid (22:6, n-3) and abolished the increase in fibrous tissue area and the decrease in isotonic and tetanic specific forces and resistance to fatigue induced by muscle injury. We concluded that supplementation with linoleic acid impairs muscle regeneration and increases fibrous tissue deposition, resulting in impaired recovery of contractile function. Oleic acid supplementation reduced fibrous tissue deposition and improved recovery of contractile function, attenuating the tissue damage caused by muscle injury.
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Affiliation(s)
- Phablo Abreu
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Carlos H J Pinheiro
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Kaio F Vitzel
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | | | - Rosângela P Torres
- Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Marco S Fortes
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | | | - Jorge Mancini-Filho
- Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, SP, Brazil
| | - Sandro M Hirabara
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil.,Institute of Physical Activity Sciences and Sports, Cruzeiro do Sul University, São Paulo, SP, Brazil
| | - Rui Curi
- Institute of Biomedical Sciences, University of São Paulo, São Paulo, SP, Brazil.
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15
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Annese T, Corsi P, Ruggieri S, Tamma R, Marinaccio C, Picocci S, Errede M, Specchia G, De Luca A, Frassanito MA, Desantis V, Vacca A, Ribatti D, Nico B. Isolation and characterization of neural stem cells from dystrophic mdx mouse. Exp Cell Res 2016; 343:190-207. [DOI: 10.1016/j.yexcr.2016.03.019] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 03/17/2016] [Accepted: 03/19/2016] [Indexed: 10/22/2022]
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16
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Morici G, Rappa F, Cappello F, Pace E, Pace A, Mudò G, Crescimanno G, Belluardo N, Bonsignore MR. Lack of Dystrophin Affects Bronchial Epithelium inmdxMice. J Cell Physiol 2016; 231:2218-23. [DOI: 10.1002/jcp.25339] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2016] [Accepted: 02/09/2016] [Indexed: 11/08/2022]
Affiliation(s)
- Giuseppe Morici
- Dipartimento di Biomedicina e Neuroscienze Cliniche (BioNeC); University of Palermo; Palermo Sicilia Italy
- Istituto di Biomedicina e Immunologia Molecolare (IBIM); Consiglio Nazionale delle Ricerche (CNR); Palermo Sicilia Italy
| | - Francesca Rappa
- Dipartimento di Biomedicina e Neuroscienze Cliniche (BioNeC); University of Palermo; Palermo Sicilia Italy
- Dipartimento di Scienze Giuridiche della Società e dello Sport; University of Palermo; Palermo Sicilia Italy
- Istituto Euro-Mediterraneo di Scienza e Tecnologia; Palermo Sicilia Italy
| | - Francesco Cappello
- Dipartimento di Biomedicina e Neuroscienze Cliniche (BioNeC); University of Palermo; Palermo Sicilia Italy
- Istituto Euro-Mediterraneo di Scienza e Tecnologia; Palermo Sicilia Italy
| | - Elisabetta Pace
- Istituto di Biomedicina e Immunologia Molecolare (IBIM); Consiglio Nazionale delle Ricerche (CNR); Palermo Sicilia Italy
| | - Andrea Pace
- Istituto Euro-Mediterraneo di Scienza e Tecnologia; Palermo Sicilia Italy
- Dipartimento di Scienze e Tecnologie Biologiche, Chimiche e Farmaceutiche (STEBICEF); University of Palermo; Palermo Sicilia Italy
| | - Giuseppa Mudò
- Dipartimento di Biomedicina e Neuroscienze Cliniche (BioNeC); University of Palermo; Palermo Sicilia Italy
| | - Grazia Crescimanno
- Istituto di Biomedicina e Immunologia Molecolare (IBIM); Consiglio Nazionale delle Ricerche (CNR); Palermo Sicilia Italy
| | - Natale Belluardo
- Dipartimento di Biomedicina e Neuroscienze Cliniche (BioNeC); University of Palermo; Palermo Sicilia Italy
| | - Maria R. Bonsignore
- Istituto di Biomedicina e Immunologia Molecolare (IBIM); Consiglio Nazionale delle Ricerche (CNR); Palermo Sicilia Italy
- Dipartimento Biomedico di Medicina Interna e Specialistica (DiBiMIS); University of Palermo; Palermo Sicilia Italy
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17
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Morrison-Nozik A, Anand P, Zhu H, Duan Q, Sabeh M, Prosdocimo DA, Lemieux ME, Nordsborg N, Russell AP, MacRae CA, Gerber AN, Jain MK, Haldar SM. Glucocorticoids enhance muscle endurance and ameliorate Duchenne muscular dystrophy through a defined metabolic program. Proc Natl Acad Sci U S A 2015; 112:E6780-9. [PMID: 26598680 PMCID: PMC4679037 DOI: 10.1073/pnas.1512968112] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Classic physiology studies dating to the 1930s demonstrate that moderate or transient glucocorticoid (GC) exposure improves muscle performance. The ergogenic properties of GCs are further evidenced by their surreptitious use as doping agents by endurance athletes and poorly understood efficacy in Duchenne muscular dystrophy (DMD), a genetic muscle-wasting disease. A defined molecular basis underlying these performance-enhancing properties of GCs in skeletal muscle remains obscure. Here, we demonstrate that ergogenic effects of GCs are mediated by direct induction of the metabolic transcription factor KLF15, defining a downstream pathway distinct from that resulting in GC-related muscle atrophy. Furthermore, we establish that KLF15 deficiency exacerbates dystrophic severity and muscle GC-KLF15 signaling mediates salutary therapeutic effects in the mdx mouse model of DMD. Thus, although glucocorticoid receptor (GR)-mediated transactivation is often associated with muscle atrophy and other adverse effects of pharmacologic GC administration, our data define a distinct GR-induced gene regulatory pathway that contributes to therapeutic effects of GCs in DMD through proergogenic metabolic programming.
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Affiliation(s)
- Alexander Morrison-Nozik
- Case Cardiovascular Research Institute, Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106
| | - Priti Anand
- Case Cardiovascular Research Institute, Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106; Gladstone Institutes, San Francisco, CA 94158
| | - Han Zhu
- Case Cardiovascular Research Institute, Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106
| | - Qiming Duan
- Case Cardiovascular Research Institute, Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106; Gladstone Institutes, San Francisco, CA 94158
| | - Mohamad Sabeh
- Case Cardiovascular Research Institute, Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106; Harrington Heart & Vascular Institute, University Hospitals Case Medical Center, Cleveland, OH 44106
| | - Domenick A Prosdocimo
- Case Cardiovascular Research Institute, Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106
| | | | - Nikolai Nordsborg
- Department of Nutrition, Exercise and Sports Sciences, University of Copenhagen, DK-200 Copenhagen, Denmark
| | - Aaron P Russell
- Centre for Physical Activity and Nutrition Research, School of Exercise and Nutrition Science, Deakin University, Burwood, VIC 3125, Australia
| | - Calum A MacRae
- Cardiovascular Division, Brigham & Women's Hospital, Harvard Medical School, Boston, MA 02115
| | - Anthony N Gerber
- Department of Pulmonary Medicine, National Jewish Health and University of Colorado Denver School of Medicine, Denver, CO 80206
| | - Mukesh K Jain
- Case Cardiovascular Research Institute, Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106; Harrington Heart & Vascular Institute, University Hospitals Case Medical Center, Cleveland, OH 44106
| | - Saptarsi M Haldar
- Case Cardiovascular Research Institute, Department of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH 44106; Gladstone Institutes, San Francisco, CA 94158; Harrington Heart & Vascular Institute, University Hospitals Case Medical Center, Cleveland, OH 44106; Department of Medicine and Cardiovascular Research Institute, University of California, San Francisco, CA 94158
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18
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Vieira NM, Elvers I, Alexander MS, Moreira YB, Eran A, Gomes JP, Marshall JL, Karlsson EK, Verjovski-Almeida S, Lindblad-Toh K, Kunkel LM, Zatz M. Jagged 1 Rescues the Duchenne Muscular Dystrophy Phenotype. Cell 2015; 163:1204-1213. [PMID: 26582133 DOI: 10.1016/j.cell.2015.10.049] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2015] [Revised: 09/28/2015] [Accepted: 10/19/2015] [Indexed: 01/16/2023]
Abstract
Duchenne muscular dystrophy (DMD), caused by mutations at the dystrophin gene, is the most common form of muscular dystrophy. There is no cure for DMD and current therapeutic approaches to restore dystrophin expression are only partially effective. The absence of dystrophin in muscle results in dysregulation of signaling pathways, which could be targets for disease therapy and drug discovery. Previously, we identified two exceptional Golden Retriever muscular dystrophy (GRMD) dogs that are mildly affected, have functional muscle, and normal lifespan despite the complete absence of dystrophin. Now, our data on linkage, whole-genome sequencing, and transcriptome analyses of these dogs compared to severely affected GRMD and control animals reveals that increased expression of Jagged1 gene, a known regulator of the Notch signaling pathway, is a hallmark of the mild phenotype. Functional analyses demonstrate that Jagged1 overexpression ameliorates the dystrophic phenotype, suggesting that Jagged1 may represent a target for DMD therapy in a dystrophin-independent manner. PAPERCLIP.
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Affiliation(s)
- Natassia M Vieira
- The Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA 02115, USA; Department of Pediatrics and Genetics, Harvard Medical School, Boston, MA 02115, USA; Human Genome and Stem Cell Center, Biosciences Institute, University of São Paulo, São Paulo 05508-090, Brazil
| | - Ingegerd Elvers
- Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge, MA 02142, USA; Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Box 597, 751 24, Uppsala, Sweden
| | - Matthew S Alexander
- The Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA 02115, USA; Department of Pediatrics and Genetics, Harvard Medical School, Boston, MA 02115, USA; The Stem Cell Program at Boston Children's Hospital, Boston, MA 02115, USA
| | - Yuri B Moreira
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil, 05508-000
| | - Alal Eran
- Department of Pediatrics and Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - Juliana P Gomes
- Human Genome and Stem Cell Center, Biosciences Institute, University of São Paulo, São Paulo 05508-090, Brazil
| | - Jamie L Marshall
- The Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA 02115, USA; Department of Pediatrics and Genetics, Harvard Medical School, Boston, MA 02115, USA
| | - Elinor K Karlsson
- Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge, MA 02142, USA; Program in Bioinformatics and Integrative Biology, University of Massachusetts Medical School, Worcester, MA 01605, USA
| | - Sergio Verjovski-Almeida
- Departamento de Bioquímica, Instituto de Química, Universidade de São Paulo, São Paulo, Brazil, 05508-000; Instituto Butantan, São Paulo 05508-050, Brazil
| | - Kerstin Lindblad-Toh
- Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge, MA 02142, USA; Science for Life Laboratory, Department of Medical Biochemistry and Microbiology, Uppsala University, Box 597, 751 24, Uppsala, Sweden
| | - Louis M Kunkel
- The Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA 02115, USA; Department of Pediatrics and Genetics, Harvard Medical School, Boston, MA 02115, USA; The Manton Center for Orphan Disease Research at Boston Children's Hospital, Boston, MA 02115, USA.
| | - Mayana Zatz
- Human Genome and Stem Cell Center, Biosciences Institute, University of São Paulo, São Paulo 05508-090, Brazil.
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19
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Biressi S, Gopinath SD. The quasi-parallel lives of satellite cells and atrophying muscle. Front Aging Neurosci 2015; 7:140. [PMID: 26257645 PMCID: PMC4510774 DOI: 10.3389/fnagi.2015.00140] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2015] [Accepted: 07/06/2015] [Indexed: 12/25/2022] Open
Abstract
Skeletal muscle atrophy or wasting accompanies various chronic illnesses and the aging process, thereby reducing muscle function. One of the most important components contributing to effective muscle repair in postnatal organisms, the satellite cells (SCs), have recently become the focus of several studies examining factors participating in the atrophic process. We critically examine here the experimental evidence linking SC function with muscle loss in connection with various diseases as well as aging, and in the subsequent recovery process. Several recent reports have investigated the changes in SCs in terms of their differentiation and proliferative capacity in response to various atrophic stimuli. In this regard, we review the molecular changes within SCs that contribute to their dysfunctional status in atrophy, with the intention of shedding light on novel potential pharmacological targets to counteract the loss of muscle mass.
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Affiliation(s)
- Stefano Biressi
- Dulbecco Telethon Institute and Centre for Integrative Biology (CIBIO), University of TrentoTrento, Italy
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20
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Biochemical and Functional Comparisons of mdx and Sgcg(-/-) Muscular Dystrophy Mouse Models. BIOMED RESEARCH INTERNATIONAL 2015; 2015:131436. [PMID: 26064876 PMCID: PMC4433636 DOI: 10.1155/2015/131436] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2014] [Revised: 01/13/2015] [Accepted: 01/13/2015] [Indexed: 12/31/2022]
Abstract
Mouse models have provided an essential platform to investigate facets of human diseases, from etiology, diagnosis, and prognosis, to potential treatments. Muscular dystrophy (MD) is the most common human genetic disease occurring in approximately 1 in 2500 births. The mdx mouse, which is dystrophin-deficient, has long been used to model this disease. However, this mouse strain displays a rather mild disease course compared to human patients. The mdx mice have been bred to additional genetically engineered mice to worsen the disease. Alternatively, other genes which cause human MD have been genetically disrupted in mice. We are now comparing disease progression from one of these alternative gene disruptions, the γ-sarcoglycan null mouse Sgcg−/− on the DBA2/J background, to the mdx mouse line. This paper aims to assess the time-course severity of the disease in the mouse models and determine which is best for MD research. The Sgcg−/− mice have a more severe phenotype than the mdx mice. Muscle function was assessed by plethysmography and echocardiography. Histologically the Sgcg−/− mice displayed increased fibrosis and variable fiber size. By quantitative Evan's blue dye uptake and hydroxyproline content two key disease determinants, membrane permeability and fibrosis respectively, were also proven worse in the Sgcg−/− mice.
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21
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Gutpell KM, Hrinivich WT, Hoffman LM. Skeletal muscle fibrosis in the mdx/utrn+/- mouse validates its suitability as a murine model of Duchenne muscular dystrophy. PLoS One 2015; 10:e0117306. [PMID: 25607927 PMCID: PMC4301874 DOI: 10.1371/journal.pone.0117306] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2014] [Accepted: 12/22/2014] [Indexed: 12/31/2022] Open
Abstract
Various therapeutic approaches have been studied for the treatment of Duchenne muscular dystrophy (DMD), but none of these approaches have led to significant long-term effects in patients. One reason for this observed inefficacy may be the use of inappropriate animal models for the testing of therapeutic agents. The mdx mouse is the most widely used murine model of DMD, yet it does not model the fibrotic progression observed in patients. Other murine models of DMD are available that lack one or both alleles of utrophin, a functional analog of dystrophin. The aim of this study was to compare fibrosis and myofiber damage in the mdx, mdx/utrn+/- and double knockout (dko) mouse models. We used Masson’s trichrome stain and percentage of centrally-nucleated myofibers as indicators of fibrosis and myofiber regeneration, respectively, to assess disease progression in diaphragm and gastrocnemius muscles harvested from young and aged wild-type, mdx, mdx/utrn+/- and dko mice. Our results indicated that eight week-old gastrocnemius muscles of both mdx/utrn+/- and dko hind limb developed fibrosis whereas age-matched mdx gastrocnemius muscle did not (p = 0.002). The amount of collagen found in the mdx/utrn+/- diaphragm was significantly higher than that found in the corresponding diaphragm muscles of wild-type animals, but not of mdx animals (p = 0.0003). Aged mdx/utrn+/- mice developed fibrosis in both diaphragm and gastrocnemius muscles compared to wild-type controls (p = 0.003). Mdx diaphragm was fibrotic in aged mice as well (p = 0.0235), whereas the gastrocnemius muscle in these animals was not fibrotic. We did not measure a significant difference in collagen staining between wild-type and mdx gastrocnemius muscles. The results of this study support previous reports that the moderately-affected mdx/utrn+/- mouse is a better model of DMD, and we show here that this difference is apparent by 2 months of age.
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Affiliation(s)
- Kelly M. Gutpell
- Imaging Program, Lawson Health Research Institute, Department of Anatomy and Cell Biology, Western University, London, ON, Canada
- * E-mail:
| | | | - Lisa M. Hoffman
- Imaging Program, Lawson Health Research Institute, Department of Anatomy and Cell Biology, Western University, Department of Medical Biophysics, Western University, London, ON, Canada
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22
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Jiang C, Wen Y, Kuroda K, Hannon K, Rudnicki MA, Kuang S. Notch signaling deficiency underlies age-dependent depletion of satellite cells in muscular dystrophy. Dis Model Mech 2014; 7:997-1004. [PMID: 24906372 PMCID: PMC4107328 DOI: 10.1242/dmm.015917] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Duchenne muscular dystrophy (DMD) is a devastating disease characterized by muscle wasting, loss of mobility and death in early adulthood. Satellite cells are muscle-resident stem cells responsible for the repair and regeneration of damaged muscles. One pathological feature of DMD is the progressive depletion of satellite cells, leading to the failure of muscle repair. Here, we attempted to explore the molecular mechanisms underlying satellite cell ablation in the dystrophin mutant mdx mouse, a well-established model for DMD. Initial muscle degeneration activates satellite cells, resulting in increased satellite cell number in young mdx mice. This is followed by rapid loss of satellite cells with age due to the reduced self-renewal ability of mdx satellite cells. In addition, satellite cell composition is altered even in young mdx mice, with significant reductions in the abundance of non-committed (Pax7+ and Myf5−) satellite cells. Using a Notch-reporter mouse, we found that the mdx satellite cells have reduced activation of Notch signaling, which has been shown to be necessary to maintain satellite cell quiescence and self-renewal. Concomitantly, the expression of Notch1, Notch3, Jag1, Hey1 and HeyL are reduced in the mdx primary myoblast. Finally, we established a mouse model to constitutively activate Notch signaling in satellite cells, and show that Notch activation is sufficient to rescue the self-renewal deficiencies of mdx satellite cells. These results demonstrate that Notch signaling is essential for maintaining the satellite cell pool and that its deficiency leads to depletion of satellite cells in DMD.
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Affiliation(s)
- Chunhui Jiang
- Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Yefei Wen
- Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Kazuki Kuroda
- Molecular Medicine Program, Ottawa Hospital Research Institute, Ottawa, ON K1Y 4E9, Canada
| | - Kevin Hannon
- Department of Basic Medical Sciences, Purdue University, West Lafayette, IN 47907, USA
| | - Michael A Rudnicki
- Molecular Medicine Program, Ottawa Hospital Research Institute, Ottawa, ON K1Y 4E9, Canada
| | - Shihuan Kuang
- Department of Animal Sciences, Purdue University, West Lafayette, IN 47907, USA
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