1
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Ruparelia AA, Montandon M, Merriner J, Huang C, Wong SFL, Sonntag C, Hardee JP, Lynch GS, Miles LB, Siegel A, Hall TE, Schittenhelm RB, Currie PD. Atrogin-1 promotes muscle homeostasis by regulating levels of endoplasmic reticulum chaperone BiP. JCI Insight 2024; 9:e167578. [PMID: 38530354 DOI: 10.1172/jci.insight.167578] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 03/14/2024] [Indexed: 03/27/2024] Open
Abstract
Skeletal muscle wasting results from numerous pathological conditions affecting both the musculoskeletal and nervous systems. A unifying feature of these pathologies is the upregulation of members of the E3 ubiquitin ligase family, resulting in increased proteolytic degradation of target proteins. Despite the critical role of E3 ubiquitin ligases in regulating muscle mass, the specific proteins they target for degradation and the mechanisms by which they regulate skeletal muscle homeostasis remain ill-defined. Here, using zebrafish loss-of-function models combined with in vivo cell biology and proteomic approaches, we reveal a role of atrogin-1 in regulating the levels of the endoplasmic reticulum chaperone BiP. Loss of atrogin-1 resulted in an accumulation of BiP, leading to impaired mitochondrial dynamics and a subsequent loss in muscle fiber integrity. We further implicated a disruption in atrogin-1-mediated BiP regulation in the pathogenesis of Duchenne muscular dystrophy. We revealed that BiP was not only upregulated in Duchenne muscular dystrophy, but its inhibition using pharmacological strategies, or by upregulating atrogin-1, significantly ameliorated pathology in a zebrafish model of Duchenne muscular dystrophy. Collectively, our data implicate atrogin-1 and BiP in the pathogenesis of Duchenne muscular dystrophy and highlight atrogin-1's essential role in maintaining muscle homeostasis.
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Affiliation(s)
- Avnika A Ruparelia
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia
- Department of Anatomy and Physiology, School of Biomedical Sciences, Faculty of Medicine Dentistry and Health Sciences, and
- Centre for Muscle Research, Department of Anatomy and Physiology, University of Melbourne, Melbourne, Victoria, Australia
| | - Margo Montandon
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia
| | - Jo Merriner
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia
| | - Cheng Huang
- Monash Proteomics and Metabolomics Facility, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Siew Fen Lisa Wong
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia
| | - Carmen Sonntag
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia
| | - Justin P Hardee
- Centre for Muscle Research, Department of Anatomy and Physiology, University of Melbourne, Melbourne, Victoria, Australia
| | - Gordon S Lynch
- Centre for Muscle Research, Department of Anatomy and Physiology, University of Melbourne, Melbourne, Victoria, Australia
| | - Lee B Miles
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia
| | - Ashley Siegel
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia
| | - Thomas E Hall
- Institute for Molecular Bioscience, University of Queensland, Brisbane, Queensland, Australia
| | - Ralf B Schittenhelm
- Monash Proteomics and Metabolomics Facility, Monash Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Peter D Currie
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria, Australia
- EMBL Australia, Victorian Node, Monash University, Clayton, Victoria, Australia
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2
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Quach TK, Taylor MF, Currie PD, Eynon N, Ruparelia AA. Skeletal muscle ageing: lessons from teleosts. J Gerontol A Biol Sci Med Sci 2024:glae052. [PMID: 38367020 DOI: 10.1093/gerona/glae052] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2023] [Indexed: 02/19/2024] Open
Abstract
Ageing is the greatest risk factor for a multitude of age-related diseases including sarcopenia -the loss of skeletal muscle mass and strength - which occurs at remarkable rates each year. There is an unmet need not only to understand the mechanisms that drive sarcopenia, but also to identify novel therapeutic strategies. Given the ease and affordability of husbandry, along with advances in genomics, genome editing technologies and imaging capabilities, teleost models are increasingly used for ageing and sarcopenia research. Here, we explain how teleost species such as zebrafish, African turquoise killifish and medaka recapitulate many of the classical hallmarks of sarcopenia, and discuss the various dietary, pharmacological and genetic approaches that have been used in teleosts to understand the mechanistic basis of sarcopenia.
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Affiliation(s)
- Tuyen K Quach
- Centre for Muscle Research, Department of Anatomy and Physiology, University of Melbourne, Melbourne, Victoria, 3010, Australia
- Department of Anatomy and Physiology, School of Biomedical Sciences, Faculty of Medicine Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria, 3010, Australia
| | - Megan F Taylor
- Australian Regenerative Medicine Institute, Monash University, Wellington Road, Clayton, Victoria, 3800, Australia
| | - Peter D Currie
- Australian Regenerative Medicine Institute, Monash University, Wellington Road, Clayton, Victoria, 3800, Australia
- EMBL Australia, Victorian Node, Monash University, Clayton, Victoria, 3800, Australia
| | - Nir Eynon
- Australian Regenerative Medicine Institute, Monash University, Wellington Road, Clayton, Victoria, 3800, Australia
| | - Avnika A Ruparelia
- Centre for Muscle Research, Department of Anatomy and Physiology, University of Melbourne, Melbourne, Victoria, 3010, Australia
- Department of Anatomy and Physiology, School of Biomedical Sciences, Faculty of Medicine Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria, 3010, Australia
- Australian Regenerative Medicine Institute, Monash University, Wellington Road, Clayton, Victoria, 3800, Australia
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3
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de Winter JM, Molenaar JP, Yuen M, van der Pijl R, Shen S, Conijn S, van de Locht M, Willigenburg M, Bogaards SJ, van Kleef ES, Lassche S, Persson M, Rassier DE, Sztal TE, Ruparelia AA, Oorschot V, Ramm G, Hall TE, Xiong Z, Johnson CN, Li F, Kiss B, Lozano-Vidal N, Boon RA, Marabita M, Nogara L, Blaauw B, Rodenburg RJ, Küsters B, Doorduin J, Beggs AH, Granzier H, Campbell K, Ma W, Irving T, Malfatti E, Romero NB, Bryson-Richardson RJ, van Engelen BG, Voermans NC, Ottenheijm CA. KBTBD13 is an actin-binding protein that modulates muscle kinetics. J Clin Invest 2024; 134:e179111. [PMID: 38299595 PMCID: PMC10836800 DOI: 10.1172/jci179111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2024] Open
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4
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Karuppasamy M, English KG, Henry CA, Manzini MC, Parant JM, Wright MA, Ruparelia AA, Currie PD, Gupta VA, Dowling JJ, Maves L, Alexander MS. Standardization of zebrafish drug testing parameters for muscle diseases. Dis Model Mech 2024; 17:dmm050339. [PMID: 38235578 PMCID: PMC10820820 DOI: 10.1242/dmm.050339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2023] [Accepted: 12/06/2023] [Indexed: 01/19/2024] Open
Abstract
Skeletal muscular diseases predominantly affect skeletal and cardiac muscle, resulting in muscle weakness, impaired respiratory function and decreased lifespan. These harmful outcomes lead to poor health-related quality of life and carry a high healthcare economic burden. The absence of promising treatments and new therapies for muscular disorders requires new methods for candidate drug identification and advancement in animal models. Consequently, the rapid screening of drug compounds in an animal model that mimics features of human muscle disease is warranted. Zebrafish are a versatile model in preclinical studies that support developmental biology and drug discovery programs for novel chemical entities and repurposing of established drugs. Due to several advantages, there is an increasing number of applications of the zebrafish model for high-throughput drug screening for human disorders and developmental studies. Consequently, standardization of key drug screening parameters, such as animal husbandry protocols, drug compound administration and outcome measures, is paramount for the continued advancement of the model and field. Here, we seek to summarize and explore critical drug treatment and drug screening parameters in the zebrafish-based modeling of human muscle diseases. Through improved standardization and harmonization of drug screening parameters and protocols, we aim to promote more effective drug discovery programs.
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Affiliation(s)
- Muthukumar Karuppasamy
- Division of Neurology, Department of Pediatrics, University of Alabama at Birmingham and Children's of Alabama, Birmingham, AL 35294, USA
| | - Katherine G. English
- Division of Neurology, Department of Pediatrics, University of Alabama at Birmingham and Children's of Alabama, Birmingham, AL 35294, USA
| | - Clarissa A. Henry
- Graduate School of Biomedical Science and Engineering, University of Maine, Orono, ME 04469, USA
- School of Biology and Ecology, University of Maine, Orono, ME 04469, USA
| | - M. Chiara Manzini
- Child Health Institute of New Jersey and Department of Neuroscience and Cell Biology, Rutgers, Robert Wood Johnson Medical School, New Brunswick, NJ 08901, USA
| | - John M. Parant
- Department of Pharmacology and Toxicology, University of Alabama at Birmingham Heersink School of Medicine, Birmingham, AL 35294, USA
| | - Melissa A. Wright
- Department of Pediatrics, Section of Child Neurology, University of Colorado at Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Avnika A. Ruparelia
- Department of Anatomy and Physiology, School of Biomedical Sciences, Faculty of Medicine Dentistry and Health Sciences, University of Melbourne, Melbourne, Victoria 3010, Australia
- Centre for Muscle Research, Department of Anatomy and Physiology, University of Melbourne, Melbourne, Victoria 3010, Australia
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria 3800, Australia
| | - Peter D. Currie
- Centre for Muscle Research, Department of Anatomy and Physiology, University of Melbourne, Melbourne, Victoria 3010, Australia
- Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria 3800, Australia
- EMBL Australia, Victorian Node, Monash University, Clayton, Victoria 3800, Australia
| | - Vandana A. Gupta
- Division of Genetics, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - James J. Dowling
- Division of Neurology, The Hospital for Sick Children, Toronto, Ontario M5G 1X8, Canada
- Department of Paediatrics, University of Toronto, Toronto, Ontario M5G 1X8, Canada
- Program for Genetics and Genome Biology, The Hospital for Sick Children, Toronto, Ontario M5G 0A4, Canada
- Department of Molecular Genetics, University of Toronto, Toronto, Ontario M5G 0A4, Canada
| | - Lisa Maves
- Center for Developmental Biology and Regenerative Medicine, Seattle Children's Research Institute, Seattle, WA 98101, USA
- Department of Pediatrics, University of Washington, Seattle, WA 98195, USA
| | - Matthew S. Alexander
- Division of Neurology, Department of Pediatrics, University of Alabama at Birmingham and Children's of Alabama, Birmingham, AL 35294, USA
- UAB Center for Exercise Medicine, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Department of Genetics, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- Civitan International Research Center, University of Alabama at Birmingham, Birmingham, AL 35294, USA
- UAB Center for Neurodegeneration and Experimental Therapeutics (CNET), Birmingham, AL 35294, USA
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5
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Ruparelia AA, Salavaty A, Barlow CK, Lu Y, Sonntag C, Hersey L, Eramo MJ, Krug J, Reuter H, Schittenhelm RB, Ramialison M, Cox A, Ryan MT, Creek DJ, Englert C, Currie PD. The African killifish: A short-lived vertebrate model to study the biology of sarcopenia and longevity. Aging Cell 2024; 23:e13862. [PMID: 37183563 PMCID: PMC10776123 DOI: 10.1111/acel.13862] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2022] [Revised: 04/13/2023] [Accepted: 04/18/2023] [Indexed: 05/16/2023] Open
Abstract
Sarcopenia, the age-related decline in muscle function, places a considerable burden on health-care systems. While the stereotypic hallmarks of sarcopenia are well characterized, their contribution to muscle wasting remains elusive, which is partly due to the limited availability of animal models. Here, we have performed cellular and molecular characterization of skeletal muscle from the African killifish-an extremely short-lived vertebrate-revealing that while many characteristics deteriorate with increasing age, supporting the use of killifish as a model for sarcopenia research, some features surprisingly reverse to an "early-life" state in the extremely old stages. This suggests that in extremely old animals, there may be mechanisms that prevent further deterioration of skeletal muscle, contributing to an extension of life span. In line with this, we report a reduction in mortality rates in extremely old killifish. To identify mechanisms for this phenomenon, we used a systems metabolomics approach, which revealed that during aging there is a striking depletion of triglycerides, mimicking a state of calorie restriction. This results in the activation of mitohormesis, increasing Sirt1 levels, which improves lipid metabolism and maintains nutrient homeostasis in extremely old animals. Pharmacological induction of Sirt1 in aged animals was sufficient to induce a late life-like metabolic profile, supporting its role in life span extension in vertebrate populations that are naturally long-lived. Collectively, our results demonstrate that killifish are not only a novel model to study the biological processes that govern sarcopenia, but they also provide a unique vertebrate system to dissect the regulation of longevity.
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Affiliation(s)
- Avnika A. Ruparelia
- Australian Regenerative Medicine Institute, Monash UniversityClaytonAustralia
- Department of Anatomy and Physiology, School of Biomedical Sciences, Faculty of Medicine Dentistry and Health SciencesUniversity of MelbourneMelbourneAustralia
- Centre for Muscle Research, Department of Anatomy and PhysiologyUniversity of MelbourneMelbourneAustralia
| | - Adrian Salavaty
- Australian Regenerative Medicine Institute, Monash UniversityClaytonAustralia
- Systems Biology Institute Australia, Monash UniversityClaytonAustralia
| | - Christopher K. Barlow
- Department of Biochemistry and Molecular BiologyMonash UniversityClaytonAustralia
- Monash Proteomics and Metabolomics FacilityMonash Biomedicine Discovery Institute, Monash UniversityClaytonAustralia
| | - Yansong Lu
- Australian Regenerative Medicine Institute, Monash UniversityClaytonAustralia
| | - Carmen Sonntag
- Australian Regenerative Medicine Institute, Monash UniversityClaytonAustralia
| | - Lucy Hersey
- Australian Regenerative Medicine Institute, Monash UniversityClaytonAustralia
| | - Matthew J. Eramo
- Department of Biochemistry and Molecular BiologyMonash Biomedicine Discovery Institute, Monash UniversityClaytonAustralia
| | - Johannes Krug
- Leibniz Institute on Aging—Fritz Lipmann Institute (FLI)JenaGermany
| | - Hanna Reuter
- Leibniz Institute on Aging—Fritz Lipmann Institute (FLI)JenaGermany
| | - Ralf B. Schittenhelm
- Department of Biochemistry and Molecular BiologyMonash UniversityClaytonAustralia
- Monash Proteomics and Metabolomics FacilityMonash Biomedicine Discovery Institute, Monash UniversityClaytonAustralia
| | - Mirana Ramialison
- Australian Regenerative Medicine Institute, Monash UniversityClaytonAustralia
- Systems Biology Institute Australia, Monash UniversityClaytonAustralia
| | - Andrew Cox
- Peter MacCallum Cancer CentreMelbourneAustralia
- Department of Biochemistry and PharmacologyThe University of MelbourneMelbourneAustralia
| | - Michael T. Ryan
- Department of Biochemistry and Molecular BiologyMonash Biomedicine Discovery Institute, Monash UniversityClaytonAustralia
| | - Darren J. Creek
- Monash Proteomics and Metabolomics FacilityMonash Biomedicine Discovery Institute, Monash UniversityClaytonAustralia
- Drug Delivery, Disposition and DynamicsMonash Institute of Pharmaceutical Sciences, Monash UniversityParkvilleAustralia
| | - Christoph Englert
- Leibniz Institute on Aging—Fritz Lipmann Institute (FLI)JenaGermany
- Institute of Biochemistry and Biophysics, Friedrich‐Schiller‐University JenaJenaGermany
| | - Peter D. Currie
- Australian Regenerative Medicine Institute, Monash UniversityClaytonAustralia
- EMBL Australia, Victorian NodeMonash UniversityClaytonAustralia
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6
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Douek AM, Klein EI, Kaslin J, Currie PD, Ruparelia AA. Cellular and Molecular Characterization of the Effects of the Zebrafish Embryo Genotyper Protocol. Zebrafish 2021; 18:92-95. [PMID: 33481695 DOI: 10.1089/zeb.2020.1958] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
The Zebrafish Embryo Genotyper (ZEG) device provides a promising tool for genotyping live embryos. Although the gross morphology and survival of embryos after the use of ZEG are unaffected, the cellular and molecular effects of the ZEG protocol remain unknown. To address this, we have examined the integrity of specific tissues, and evaluated the expression of stress-responsive genes to determine the impact of the ZEG protocol. Our analyses reveal that although ZEG results in a low-level acute stress response, no long-lasting effects are evident, supporting its utilization for a variety of downstream assays.
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Affiliation(s)
- Alon M Douek
- Australian Regenerative Medicine Institute, Monash University, Clayton, Australia
| | - Emma I Klein
- Australian Regenerative Medicine Institute, Monash University, Clayton, Australia
| | - Jan Kaslin
- Australian Regenerative Medicine Institute, Monash University, Clayton, Australia
| | - Peter D Currie
- Australian Regenerative Medicine Institute, Monash University, Clayton, Australia
| | - Avnika A Ruparelia
- Australian Regenerative Medicine Institute, Monash University, Clayton, Australia
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7
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Abstract
Skeletal muscle has a remarkable ability to regenerate following injury, which is driven by obligate tissue resident muscle stem cells. Following injury, the muscle stem cell is activated and undergoes cell proliferation to generate a pool of myoblasts, which subsequently differentiate to form new muscle fibers. In many muscle wasting conditions, including muscular dystrophy and ageing, this process is impaired resulting in the inability of muscle to regenerate. The process of muscle regeneration in zebrafish is highly conserved with mammalian systems providing an excellent system to study muscle stem cell function and regeneration, in muscle wasting conditions such as muscular dystrophy. Here, we present a method to examine muscle regeneration in zebrafish models of muscle disease. The first step involves the use of a genotyping platform that allows the determination of the genotype of the larvae prior to eliciting an injury. Having determined the genotype, the muscle is injured using a needle stab, following which polarizing light microscopy is used to determine the extent of muscle regeneration. We therefore provide a high throughput pipeline which allows the examination of muscle regeneration in zebrafish models of muscle disease.
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Affiliation(s)
- Margo Montandon
- Australian Regenerative Medicine Institute, Monash University
| | - Peter D Currie
- Australian Regenerative Medicine Institute, Monash University
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8
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Ruparelia AA, McKaige EA, Williams C, Schulze KE, Fuchs M, Oorschot V, Lacene E, Meregalli M, Lee C, Serrano RJ, Baxter EC, Monro K, Torrente Y, Ramm G, Stojkovic T, Lavoie JN, Bryson-Richardson RJ. Metformin rescues muscle function in BAG3 myofibrillar myopathy models. Autophagy 2020; 17:2494-2510. [DOI: 10.1080/15548627.2020.1833500] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Affiliation(s)
| | - Emily A. McKaige
- School of Biological Sciences, Monash University, Melbourne, Australia
| | - Caitlin Williams
- School of Biological Sciences, Monash University, Melbourne, Australia
| | | | - Margit Fuchs
- Centre de Recherche Sur le Cancer de l’Université Laval, Ville de Québec, Canada
- Oncologie, Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec-Université Laval, Ville de Québec, Canada
| | - Viola Oorschot
- Monash Ramaciotti Centre for Structural Cryo-Electron Microscopy, Monash University, Melbourne, Australia
| | - Emmanuelle Lacene
- Institut de Myologie, Laboratoire de Pathologie Risler, APHP, Centre de Référence de Pathologie Neuromusculaire Nord/Est/Ile-de-France, Paris, France
| | - Mirella Meregalli
- Stem Cell Laboratory, Department of Pathophysiology and Transplantation, Università Degli Studi di Milano, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico di Milano, Centro Dino Ferrari, Milan, Italy
| | - Clara Lee
- School of Biological Sciences, Monash University, Melbourne, Australia
| | - Rita J. Serrano
- School of Biological Sciences, Monash University, Melbourne, Australia
| | - Emily C. Baxter
- School of Biological Sciences, Monash University, Melbourne, Australia
| | - Keyne Monro
- School of Biological Sciences, Monash University, Melbourne, Australia
| | - Yvan Torrente
- Stem Cell Laboratory, Department of Pathophysiology and Transplantation, Università Degli Studi di Milano, Fondazione IRCCS Ca’ Granda Ospedale Maggiore Policlinico di Milano, Centro Dino Ferrari, Milan, Italy
| | - Georg Ramm
- Monash Ramaciotti Centre for Structural Cryo-Electron Microscopy, Monash University, Melbourne, Australia
- Biochemistry and Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Australia
| | - Tanya Stojkovic
- Institut de Myologie, Centre de Référence des Maladies Neuromusculaires, Hôpital Pitié-Salpétrière, Assistance-Publique Hôpitaux de Paris, Sorbonne Université, Paris, France
| | - Josée N. Lavoie
- Centre de Recherche Sur le Cancer de l’Université Laval, Ville de Québec, Canada
- Oncologie, Centre de Recherche du Centre Hospitalier Universitaire (CHU) de Québec-Université Laval, Ville de Québec, Canada
- Département de Biologie Moléculaire, Biochimie Médicale et Pathologie, Université Laval, Ville de Québec, Canada
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9
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de Winter JM, Molenaar JP, Yuen M, van der Pijl R, Shen S, Conijn S, van de Locht M, Willigenburg M, Bogaards SJ, van Kleef ES, Lassche S, Persson M, Rassier DE, Sztal TE, Ruparelia AA, Oorschot V, Ramm G, Hall TE, Xiong Z, Johnson CN, Li F, Kiss B, Lozano-Vidal N, Boon RA, Marabita M, Nogara L, Blaauw B, Rodenburg RJ, Küsters B, Doorduin J, Beggs AH, Granzier H, Campbell K, Ma W, Irving T, Malfatti E, Romero NB, Bryson-Richardson RJ, van Engelen BG, Voermans NC, Ottenheijm CA. KBTBD13 is an actin-binding protein that modulates muscle kinetics. J Clin Invest 2020; 130:754-767. [PMID: 31671076 PMCID: PMC6994151 DOI: 10.1172/jci124000] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 10/24/2019] [Indexed: 11/17/2022] Open
Abstract
The mechanisms that modulate the kinetics of muscle relaxation are critically important for muscle function. A prime example of the impact of impaired relaxation kinetics is nemaline myopathy caused by mutations in KBTBD13 (NEM6). In addition to weakness, NEM6 patients have slow muscle relaxation, compromising contractility and daily life activities. The role of KBTBD13 in muscle is unknown, and the pathomechanism underlying NEM6 is undetermined. A combination of transcranial magnetic stimulation-induced muscle relaxation, muscle fiber- and sarcomere-contractility assays, low-angle x-ray diffraction, and superresolution microscopy revealed that the impaired muscle-relaxation kinetics in NEM6 patients are caused by structural changes in the thin filament, a sarcomeric microstructure. Using homology modeling and binding and contractility assays with recombinant KBTBD13, Kbtbd13-knockout and Kbtbd13R408C-knockin mouse models, and a GFP-labeled Kbtbd13-transgenic zebrafish model, we discovered that KBTBD13 binds to actin - a major constituent of the thin filament - and that mutations in KBTBD13 cause structural changes impairing muscle-relaxation kinetics. We propose that this actin-based impaired relaxation is central to NEM6 pathology.
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Affiliation(s)
| | - Joery P. Molenaar
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, Netherlands
- Department of Neurology, Rijnstate Hospital, Arnhem, Netherlands
| | - Michaela Yuen
- Department of Physiology, Amsterdam University Medical Center, Netherlands
- Discipline of Paediatrics and Child Health, Faculty of Medicine, University of Sydney, Australia
| | - Robbert van der Pijl
- Department of Physiology, Amsterdam University Medical Center, Netherlands
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona, USA
| | - Shengyi Shen
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona, USA
| | - Stefan Conijn
- Department of Physiology, Amsterdam University Medical Center, Netherlands
| | | | - Menne Willigenburg
- Department of Physiology, Amsterdam University Medical Center, Netherlands
| | | | - Esmee S.B. van Kleef
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, Netherlands
| | - Saskia Lassche
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, Netherlands
| | - Malin Persson
- Department of Kinesiology and Physical Education, McGill University, Montreal, Canada
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - Dilson E. Rassier
- Department of Kinesiology and Physical Education, McGill University, Montreal, Canada
| | - Tamar E. Sztal
- School of Biological Sciences, Monash University, Melbourne, Australia
| | | | - Viola Oorschot
- Monash Ramaciotti Centre for Structural Cryo-Electron Microscopy, Monash University, Melbourne, Australia
| | - Georg Ramm
- Monash Ramaciotti Centre for Structural Cryo-Electron Microscopy, Monash University, Melbourne, Australia
- Biochemistry and Molecular Biology, Monash Biomedicine Discovery Institute, Monash University, Melbourne, Victoria, Australia
| | - Thomas E. Hall
- Institute for Molecular Bioscience, University of Queensland, Queensland, Australia
| | - Zherui Xiong
- Institute for Molecular Bioscience, University of Queensland, Queensland, Australia
| | - Christopher N. Johnson
- Division of Clinical Pharmacology, Center for Arrhythmia Research and Therapeutics and Center for Structural Biology, Vanderbilt University Medical Center, Nashville, Tennessee, USA
| | - Frank Li
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona, USA
| | - Balazs Kiss
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona, USA
| | | | - Reinier A. Boon
- Department of Physiology, Amsterdam University Medical Center, Netherlands
| | - Manuela Marabita
- Venetian Institute of Molecular Medicine, Department of Biomedical Sciences, University of Padova, Italy
| | - Leonardo Nogara
- Venetian Institute of Molecular Medicine, Department of Biomedical Sciences, University of Padova, Italy
| | - Bert Blaauw
- Venetian Institute of Molecular Medicine, Department of Biomedical Sciences, University of Padova, Italy
| | - Richard J. Rodenburg
- Department of Pediatrics, Radboud University Medical Centre, Translational Metabolic Laboratory, Nijmegen, Netherlands
| | - Benno Küsters
- Department of Pathology, Radboud University Medical Centre, Nijmegen, Netherlands
| | - Jonne Doorduin
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, Netherlands
| | - Alan H. Beggs
- Division of Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Henk Granzier
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona, USA
| | - Ken Campbell
- Department of Physiology and Division of Cardiovascular Medicine, University of Kentucky, Lexington, Kentucky, USA
| | - Weikang Ma
- BioCAT, Illinois Institute of Technology, Chicago, Illinois, USA
| | - Thomas Irving
- BioCAT, Illinois Institute of Technology, Chicago, Illinois, USA
| | - Edoardo Malfatti
- Service Neurologie Médicale, Centre de Référence Maladies Neuromusculaire Paris-Nord CHU Raymond-Poincaré, U1179 UVSQ-INSERM Handicap Neuromusculaire: Physiologie, Biothérapie et Pharmacologie Appliquées, UFR des Sciences de la Santé Simone Veil, Université Versailles-Saint-Quentin-en-Yvelines, Garches, France
| | - Norma B. Romero
- Sorbonne Université, Myology Institute, Neuromuscular Morphology Unit, Center for Research in Myology, GH Pitié-Salpêtrière Paris, France
- Centre de Référence de Pathologie Neuromusculaire Paris-Est, GHU Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, Paris, France
| | | | - Baziel G.M. van Engelen
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, Netherlands
| | - Nicol C. Voermans
- Department of Neurology, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, Netherlands
| | - Coen A.C. Ottenheijm
- Department of Physiology, Amsterdam University Medical Center, Netherlands
- Department of Cellular and Molecular Medicine, University of Arizona, Tucson, Arizona, USA
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10
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Ruparelia AA, Ratnayake D, Currie PD. Stem cells in skeletal muscle growth and regeneration in amniotes and teleosts: Emerging themes. Wiley Interdiscip Rev Dev Biol 2019; 9:e365. [PMID: 31743958 DOI: 10.1002/wdev.365] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 09/22/2019] [Accepted: 10/03/2019] [Indexed: 12/19/2022]
Abstract
Skeletal muscle is a contractile, postmitotic tissue that retains the capacity to grow and regenerate throughout life in amniotes and teleost. Both muscle growth and regeneration are regulated by obligate tissue resident muscle stem cells. Given that considerable knowledge exists on the myogenic process, recent studies have focused on examining the molecular markers of muscle stem cells, and on the intrinsic and extrinsic signals regulating their function. From this, two themes emerge: firstly, muscle stem cells display remarkable heterogeneity not only with regards to their gene expression profile, but also with respect to their behavior and function; and secondly, the stem cell niche is a critical regulator of muscle stem cell function during growth and regeneration. Here, we will address the current understanding of these emerging themes with emphasis on the distinct processes used by amniotes and teleost, and discuss the challenges and opportunities in the muscle growth and regeneration fields. This article is characterized under: Adult Stem Cells, Tissue Renewal, and Regeneration > Tissue Stem Cells and Niches Early Embryonic Development > Development to the Basic Body Plan Vertebrate Organogenesis > Musculoskeletal and Vascular.
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Affiliation(s)
- Avnika A Ruparelia
- Australian Regenerative Medicine Institute, Monash University, Melbourne, Victoria, Australia.,EMBL Australia, Monash University, Melbourne, Victoria, Australia
| | - Dhanushika Ratnayake
- Australian Regenerative Medicine Institute, Monash University, Melbourne, Victoria, Australia.,EMBL Australia, Monash University, Melbourne, Victoria, Australia
| | - Peter D Currie
- Australian Regenerative Medicine Institute, Monash University, Melbourne, Victoria, Australia.,EMBL Australia, Monash University, Melbourne, Victoria, Australia
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11
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O'Grady GL, Best HA, Sztal TE, Schartner V, Sanjuan-Vazquez M, Donkervoort S, Abath Neto O, Sutton RB, Ilkovski B, Romero NB, Stojkovic T, Dastgir J, Waddell LB, Boland A, Hu Y, Williams C, Ruparelia AA, Maisonobe T, Peduto AJ, Reddel SW, Lek M, Tukiainen T, Cummings BB, Joshi H, Nectoux J, Brammah S, Deleuze JF, Ing VO, Ramm G, Ardicli D, Nowak KJ, Talim B, Topaloglu H, Laing NG, North KN, MacArthur DG, Friant S, Clarke NF, Bryson-Richardson RJ, Bönnemann CG, Laporte J, Cooper ST. Variants in the Oxidoreductase PYROXD1 Cause Early-Onset Myopathy with Internalized Nuclei and Myofibrillar Disorganization. Am J Hum Genet 2016; 99:1086-1105. [PMID: 27745833 PMCID: PMC5097943 DOI: 10.1016/j.ajhg.2016.09.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Accepted: 09/07/2016] [Indexed: 01/26/2023] Open
Abstract
This study establishes PYROXD1 variants as a cause of early-onset myopathy and uses biospecimens and cell lines, yeast, and zebrafish models to elucidate the fundamental role of PYROXD1 in skeletal muscle. Exome sequencing identified recessive variants in PYROXD1 in nine probands from five families. Affected individuals presented in infancy or childhood with slowly progressive proximal and distal weakness, facial weakness, nasal speech, swallowing difficulties, and normal to moderately elevated creatine kinase. Distinctive histopathology showed abundant internalized nuclei, myofibrillar disorganization, desmin-positive inclusions, and thickened Z-bands. PYROXD1 is a nuclear-cytoplasmic pyridine nucleotide-disulphide reductase (PNDR). PNDRs are flavoproteins (FAD-binding) and catalyze pyridine-nucleotide-dependent (NAD/NADH) reduction of thiol residues in other proteins. Complementation experiments in yeast lacking glutathione reductase glr1 show that human PYROXD1 has reductase activity that is strongly impaired by the disease-associated missense mutations. Immunolocalization studies in human muscle and zebrafish myofibers demonstrate that PYROXD1 localizes to the nucleus and to striated sarcomeric compartments. Zebrafish with ryroxD1 knock-down recapitulate features of PYROXD1 myopathy with sarcomeric disorganization, myofibrillar aggregates, and marked swimming defect. We characterize variants in the oxidoreductase PYROXD1 as a cause of early-onset myopathy with distinctive histopathology and introduce altered redox regulation as a primary cause of congenital muscle disease.
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Affiliation(s)
- Gina L O'Grady
- Institute for Neuroscience and Muscle Research, Kid's Research Institute, Children's Hospital at Westmead, Sydney, NSW 2145, Australia; Discipline of Paediatrics and Child Health, Faculty of Medicine, University of Sydney, Sydney, NSW 2006, Australia; Paediatric Neurology Service, Starship Children's Health, Auckland 1023, New Zealand
| | - Heather A Best
- Institute for Neuroscience and Muscle Research, Kid's Research Institute, Children's Hospital at Westmead, Sydney, NSW 2145, Australia; Discipline of Paediatrics and Child Health, Faculty of Medicine, University of Sydney, Sydney, NSW 2006, Australia
| | - Tamar E Sztal
- School of Biological Sciences, Monash University, Melbourne, VIC 3800, Australia
| | - Vanessa Schartner
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), 67400 Illkirch, France
| | - Myriam Sanjuan-Vazquez
- Department of Molecular and Cellular Genetics, UMR7156, Université de Strasbourg, CNRS, Strasbourg 67081, France
| | - Sandra Donkervoort
- National Institute of Neurological Disorders and Stroke Neurogenetics Branch, Neuromuscular and Neurogenetic Disorders of Childhood Section, NIH, Bethesda, MD 20892-1477, USA
| | - Osorio Abath Neto
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), 67400 Illkirch, France
| | - Roger Bryan Sutton
- Department of Cell Physiology and Molecular Biophysics, and Center for Membrane Protein Research, Texas Tech University Health Sciences Center, Lubbock, TX 79430, USA
| | - Biljana Ilkovski
- Institute for Neuroscience and Muscle Research, Kid's Research Institute, Children's Hospital at Westmead, Sydney, NSW 2145, Australia
| | - Norma Beatriz Romero
- Sorbonne Universités, UPMC Univ Paris 06, INSERM UMRS974, CNRS FRE3617, Center for Research in Myology, GH Pitié-Salpêtrière, 47 Boulevard de l'hôpital, 75013 Paris, France; Centre de Référence de Pathologie Neuromusculaire Paris-Est, Institut de Myologie, GHU La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, 7503 Paris, France
| | - Tanya Stojkovic
- Centre de Référence de Pathologie Neuromusculaire Paris-Est, Institut de Myologie, GHU La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, 7503 Paris, France
| | - Jahannaz Dastgir
- National Institute of Neurological Disorders and Stroke Neurogenetics Branch, Neuromuscular and Neurogenetic Disorders of Childhood Section, NIH, Bethesda, MD 20892-1477, USA
| | - Leigh B Waddell
- Institute for Neuroscience and Muscle Research, Kid's Research Institute, Children's Hospital at Westmead, Sydney, NSW 2145, Australia
| | - Anne Boland
- Centre National de Génotypage, Institut de Génomique, CEA, CP5721, 91057 Evry, France
| | - Ying Hu
- National Institute of Neurological Disorders and Stroke Neurogenetics Branch, Neuromuscular and Neurogenetic Disorders of Childhood Section, NIH, Bethesda, MD 20892-1477, USA
| | - Caitlin Williams
- School of Biological Sciences, Monash University, Melbourne, VIC 3800, Australia
| | - Avnika A Ruparelia
- School of Biological Sciences, Monash University, Melbourne, VIC 3800, Australia
| | - Thierry Maisonobe
- Centre de Référence de Pathologie Neuromusculaire Paris-Est, Institut de Myologie, GHU La Pitié-Salpêtrière, Assistance Publique-Hôpitaux de Paris, 7503 Paris, France
| | - Anthony J Peduto
- Department of Radiology, Westmead Hospital, Western Clinical School, University of Sydney, Sydney, NSW 1024, Australia
| | - Stephen W Reddel
- Department of Neurology, Concord Clinical School, University of Sydney, Sydney, NSW 2139, Australia
| | - Monkol Lek
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA 02114, USA; Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge, MA 02142, USA
| | - Taru Tukiainen
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA 02114, USA; Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge, MA 02142, USA
| | - Beryl B Cummings
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA 02114, USA; Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge, MA 02142, USA
| | - Himanshu Joshi
- Institute for Neuroscience and Muscle Research, Kid's Research Institute, Children's Hospital at Westmead, Sydney, NSW 2145, Australia
| | - Juliette Nectoux
- Service de Biochimie et Génétique Moléculaire, HUPC Hôpital Cochin, Paris 75014, France; INSERM, U1016, Institut Cochin, CNRS UMR8104, Université Paris Descartes, Paris 75014, France
| | - Susan Brammah
- Electron Microscope Unit, Concord Repatriation General Hospital, Concord, NSW 2139, Australia
| | - Jean-François Deleuze
- Centre National de Génotypage, Institut de Génomique, CEA, CP5721, 91057 Evry, France
| | - Viola Oorschot Ing
- The Clive and Vera Ramaciotti Centre for Structural Cryo-Electron Microscopy, Monash University, Melbourne, VIC 3800, Australia
| | - Georg Ramm
- The Clive and Vera Ramaciotti Centre for Structural Cryo-Electron Microscopy, Monash University, Melbourne, VIC 3800, Australia; Department of Biochemistry and Molecular Biology, Monash University, Melbourne, VIC 3800, Australia
| | - Didem Ardicli
- Department of Pediatric Neurology, Hacettepe University Children's Hospital, 06100 Ankara, Turkey
| | - Kristen J Nowak
- Centre for Medical Research, The University of Western Australia & the Harry Perkins Institute of Medical Research, Perth, WA 6009, Australia
| | - Beril Talim
- Department of Pediatric Neurology, Hacettepe University Children's Hospital, 06100 Ankara, Turkey
| | - Haluk Topaloglu
- Department of Pediatric Neurology, Hacettepe University Children's Hospital, 06100 Ankara, Turkey
| | - Nigel G Laing
- Centre for Medical Research, The University of Western Australia & the Harry Perkins Institute of Medical Research, Perth, WA 6009, Australia
| | - Kathryn N North
- Institute for Neuroscience and Muscle Research, Kid's Research Institute, Children's Hospital at Westmead, Sydney, NSW 2145, Australia; Murdoch Children's Research Institute, The Royal Children's Hospital, Flemington Road, Parkville, VIC 3052, Australia
| | - Daniel G MacArthur
- Analytic and Translational Genetics Unit, Massachusetts General Hospital, Boston, MA 02114, USA; Broad Institute of Harvard and Massachusetts Institute of Technology, Cambridge, MA 02142, USA
| | - Sylvie Friant
- Department of Molecular and Cellular Genetics, UMR7156, Université de Strasbourg, CNRS, Strasbourg 67081, France
| | - Nigel F Clarke
- Institute for Neuroscience and Muscle Research, Kid's Research Institute, Children's Hospital at Westmead, Sydney, NSW 2145, Australia; Discipline of Paediatrics and Child Health, Faculty of Medicine, University of Sydney, Sydney, NSW 2006, Australia
| | | | - Carsten G Bönnemann
- National Institute of Neurological Disorders and Stroke Neurogenetics Branch, Neuromuscular and Neurogenetic Disorders of Childhood Section, NIH, Bethesda, MD 20892-1477, USA
| | - Jocelyn Laporte
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), 67400 Illkirch, France; Université de Strasbourg, 67081 Illkirch, France
| | - Sandra T Cooper
- Institute for Neuroscience and Muscle Research, Kid's Research Institute, Children's Hospital at Westmead, Sydney, NSW 2145, Australia; Discipline of Paediatrics and Child Health, Faculty of Medicine, University of Sydney, Sydney, NSW 2006, Australia.
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12
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Sztal TE, Ruparelia AA, Williams C, Bryson-Richardson RJ. Using Touch-evoked Response and Locomotion Assays to Assess Muscle Performance and Function in Zebrafish. J Vis Exp 2016. [PMID: 27842370 PMCID: PMC5226210 DOI: 10.3791/54431] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
Zebrafish muscle development is highly conserved with mammalian systems making them an excellent model to study muscle function and disease. Many myopathies affecting skeletal muscle function can be quickly and easily assessed in zebrafish over the first few days of embryogenesis. By 24 hr post-fertilization (hpf), wildtype zebrafish spontaneously contract their tail muscles and by 48 hpf, zebrafish exhibit controlled swimming behaviors. Reduction in the frequency of, or other alterations in, these movements may indicate a skeletal muscle dysfunction. To analyze swimming behavior and assess muscle performance in early zebrafish development, we utilize both touch-evoked escape response and locomotion assays. Touch-evoked escape response assays can be used to assess muscle performance during short burst movements resulting from contraction of fast-twitch muscle fibers. In response to an external stimulus, which in this case is a tap on the head, wildtype zebrafish at 2 days post-fertilization (dpf) typically exhibit a powerful burst swim, accompanied by sharp turns. Our method quantifies skeletal muscle function by measuring the maximum acceleration during a burst swimming motion, the acceleration being directly proportional to the force produced by muscle contraction. In contrast, locomotion assays during early zebrafish larval development are used to assess muscle performance during sustained periods of muscle activity. Using a tracking system to monitor swimming behavior, we obtain an automated calculation of the frequency of activity and distance in 6-day old zebrafish, reflective of their skeletal muscle function. Measurements of swimming performance are valuable for phenotypic assessment of disease models and high-throughput screening of mutations or chemical treatments affecting skeletal muscle function.
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13
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Leber Y, Ruparelia AA, Kirfel G, van der Ven PFM, Hoffmann B, Merkel R, Bryson-Richardson RJ, Fürst DO. Filamin C is a highly dynamic protein associated with fast repair of myofibrillar microdamage. Hum Mol Genet 2016; 25:2776-2788. [PMID: 27206985 DOI: 10.1093/hmg/ddw135] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 04/26/2016] [Accepted: 04/27/2016] [Indexed: 11/12/2022] Open
Abstract
Filamin c (FLNc) is a large dimeric actin-binding protein located at premyofibrils, myofibrillar Z-discs and myofibrillar attachment sites of striated muscle cells, where it is involved in mechanical stabilization, mechanosensation and intracellular signaling. Mutations in the gene encoding FLNc give rise to skeletal muscle diseases and cardiomyopathies. Here, we demonstrate by fluorescence recovery after photobleaching that a large fraction of FLNc is highly mobile in cultured neonatal mouse cardiomyocytes and in cardiac and skeletal muscles of live transgenic zebrafish embryos. Analysis of cardiomyocytes from Xirp1 and Xirp2 deficient animals indicates that both Xin actin-binding repeat-containing proteins stabilize FLNc selectively in premyofibrils. Using a novel assay to analyze myofibrillar microdamage and subsequent repair in cultured contracting cardiomyocytes by live cell imaging, we demonstrate that repair of damaged myofibrils is achieved within only 4 h, even in the absence of de novo protein synthesis. FLNc is immediately recruited to these sarcomeric lesions together with its binding partner aciculin and precedes detectable assembly of filamentous actin and recruitment of other myofibrillar proteins. These data disclose an unprecedented degree of flexibility of the almost crystalline contractile machinery and imply FLNc as a dynamic signaling hub, rather than a primarily structural protein. Our myofibrillar damage/repair model illustrates how (cardio)myocytes are kept functional in their mechanically and metabolically strained environment. Our results help to better understand the pathomechanisms and pathophysiology of early stages of FLNc-related myofibrillar myopathy and skeletal and cardiac diseases preceding pathological protein aggregation.
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Affiliation(s)
- Yvonne Leber
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, D53121 Bonn, Germany
| | - Avnika A Ruparelia
- School of Biological Sciences, Monash University, Melbourne, Victoria 3800, Australia
| | - Gregor Kirfel
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, D53121 Bonn, Germany
| | - Peter F M van der Ven
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, D53121 Bonn, Germany
| | - Bernd Hoffmann
- Department of Biomechanics (ICS-7), Institute of Complex Systems, Forschungszentrum Jülich, D52428 Jülich, Germany and
| | - Rudolf Merkel
- Department of Biomechanics (ICS-7), Institute of Complex Systems, Forschungszentrum Jülich, D52428 Jülich, Germany and.,Department of Biomechanics, Institute for Physical and Theoretical Chemistry, University of Bonn, D53115 Bonn, Germany
| | | | - Dieter O Fürst
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, D53121 Bonn, Germany
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14
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Ruparelia AA, Oorschot V, Ramm G, Bryson-Richardson RJ. FLNC myofibrillar myopathy results from impaired autophagy and protein insufficiency. Hum Mol Genet 2016; 25:2131-2142. [PMID: 26969713 DOI: 10.1093/hmg/ddw080] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2015] [Accepted: 03/07/2016] [Indexed: 01/23/2023] Open
Abstract
Myofibrillar myopathy is a progressive muscle disease characterized by the disintegration of muscle fibers and formation of protein aggregates. Causative mutations have been identified in nine genes encoding Z-disk proteins, including the actin binding protein filamin C (FLNC). To investigate the mechanism of disease in FLNCW2710X myopathy we overexpressed fluorescently tagged FLNC or FLNCW2710X in zebrafish. Expression of FLNCW2710X causes formation of protein aggregates but surprisingly, our studies reveal that the mutant protein localizes correctly to the Z-disk and is capable of rescuing the fiber disintegration phenotype that results from FLNC knockdown. This demonstrates that the functions necessary for muscle integrity are not impaired, and suggests that it is the formation of protein aggregates and subsequent sequestration of FLNC away from the Z-disk that results in myofibrillar disintegration. Similar to those found in patients, the aggregates in FLNCW2710X expressing fish contain the co-chaperone BAG3. FLNC is a target of the BAG3-mediated chaperone assisted selective autophagy (CASA) pathway and therefore we investigated its role, and the role of autophagy in general, in clearing protein aggregates. We reveal that despite BAG3 recruitment to the aggregates they are not degraded via CASA. Additionally, recruitment of BAG3 is sufficient to block alternative autophagy pathways which would otherwise clear the aggregates. This blockage can be relieved by reducing BAG3 levels or by stimulating autophagy. This study therefore identifies both BAG3 reduction and autophagy promotion as potential therapies for FLNCW2710X myofibrillar myopathy, and identifies protein insufficiency due to sequestration, compounded by impaired autophagy, as the cause.
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Affiliation(s)
| | - Viola Oorschot
- The Clive and Vera Ramaciotti Centre for Structural Cryo-Electron Microscopy and and
| | - Georg Ramm
- The Clive and Vera Ramaciotti Centre for Structural Cryo-Electron Microscopy and and Department of Biochemistry and Molecular Biology, Monash University, Melbourne, VIC 3800, Australia
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15
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Ruparelia AA, Simkin JE, Salgado D, Newgreen DF, Martins GG, Bryson-Richardson RJ. The quail anatomy portal. Database (Oxford) 2014; 2014:bau028. [PMID: 24715219 PMCID: PMC3978374 DOI: 10.1093/database/bau028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The Japanese quail is a widely used model organism for the study of embryonic development; however, anatomical resources are lacking. The Quail Anatomy Portal (QAP) provides 22 detailed three-dimensional (3D) models of quail embryos during development from embryonic day (E)1 to E15 generated using optical projection tomography. The 3D models provided can be virtually sectioned to investigate anatomy. Furthermore, using the 3D nature of the models, we have generated a tool to assist in the staging of quail samples. Volume renderings of each stage are provided and can be rotated to allow visualization from multiple angles allowing easy comparison of features both between stages in the database and between images or samples in the laboratory. The use of JavaScript, PHP and HTML ensure the database is accessible to users across different operating systems, including mobile devices, facilitating its use in the laboratory.The QAP provides a unique resource for researchers using the quail model. The ability to virtually section anatomical models throughout development provides the opportunity for researchers to virtually dissect the quail and also provides a valuable tool for the education of students and researchers new to the field. Database URL: http://quail.anatomyportal.org (For review username: demo, password: quail123)
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Affiliation(s)
- Avnika A Ruparelia
- School of Biological Sciences, Monash University, Melbourne, Victoria 3800, Australia, The Murdoch Childrens Research Institute, The Royal Children's Hospital, Flemington Road, Parkville, Melbourne, Victoria 3052, Australia, Australian Regenerative Medicine Institute, Monash University, Clayton, Victoria 3800, Australia, Aix Marseille Université, Inserm, GMGF UMR_S 910, 13385 Marseille, France, Instituto Gulbenkian de Ciencia, Rua da Avenida Grande 6, 2780-156 Oeiras, Portugal and Centre for Environmental Biology, Faculdade de Ciencias da Universidade de Lisboa, Campo Grande, 1749-016 Lisbon, Portugal
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16
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Ruparelia AA, Zhao M, Currie PD, Bryson-Richardson RJ. Characterization and investigation of zebrafish models of filamin-related myofibrillar myopathy. Hum Mol Genet 2012; 21:4073-83. [PMID: 22706277 DOI: 10.1093/hmg/dds231] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Myofibrillar myopathies are a group of muscle disorders characterized by the disintegration of skeletal muscle fibers and formation of sarcomeric protein aggregates. All the proteins known to be involved in myofibrillar myopathies localize to a region of the sarcomere known as the Z-disk, the site at which defects are first observed. Given the common cellular phenotype observed in this group of disorders, it is thought that there is a common mechanism of pathology. Mutations in filamin C, which has several proposed roles in the development and function of skeletal muscle, can result in filamin-related myofibrillar myopathy. The lack of a suitable animal model system has limited investigation into the mechanism of pathology in this disease and the role of filamin C in muscle development. Here, we characterize stretched out (sot), a zebrafish filamin Cb mutant, together with targeted knockdown of zebrafish filamin Ca, revealing fiber dissolution and formation of protein aggregates strikingly similar to those seen in filamin-related myofibrillar myopathies. Through knockdown of both zebrafish filamin C homologues, we demonstrate that filamin C is not required for fiber specification and that fiber damage is a consequence of muscle activity. The remarkable similarities in the myopathology between our models and filamin-related myofibrillar myopathy makes them suitable for the study of these diseases and provides unique opportunities for the investigation of the function of filamin C in muscle and development of therapies.
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Affiliation(s)
- Avnika A Ruparelia
- School of Biological Sciences, Monash University, Melbourne 3800, Australia
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