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de Vasconcelos FTGR, Souza BW, Souza LS, Vainzof M. Tubular Aggregates as a Marker of Aging in Skeletal Muscle. Methods Mol Biol 2024. [PMID: 39316334 DOI: 10.1007/7651_2024_567] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/25/2024]
Abstract
Tubular aggregates (TA) are skeletal muscle structures that arise from the progressive accumulation of sarcoplasmic reticulum proteins, mainly with aging. Muscle regeneration plays a role in TA formation. TA quantification may aid in the evaluation of muscle aging and genetic muscle degeneration. TA form over time, appears in aging in normal murine muscles. TA reduction in injured conditions may be due to the degeneration-regeneration process in muscles, with loss of damaged muscle fibers and formation of new fibers that do not present protein aggregation. These new regenerated fibers do not improve the function capacity of the aged muscle. Here, we present a methodology for labeling and identifying tubular aggregates in muscle fibers and also the standardization of its quantification.
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Affiliation(s)
| | - Brandow Willy Souza
- Human Genome and Stem Cell Research Center, Department of Genetics and Evolutionary Biology, Biosciences Institute, University of São Paulo, São Paulo, SP, Brazil
| | - Lucas Santos Souza
- Human Genome and Stem Cell Research Center, Department of Genetics and Evolutionary Biology, Biosciences Institute, University of São Paulo, São Paulo, SP, Brazil
| | - Mariz Vainzof
- Human Genome and Stem Cell Research Center, Department of Genetics and Evolutionary Biology, Biosciences Institute, University of São Paulo, São Paulo, SP, Brazil.
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2
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Grepper D, Tabasso C, Zanou N, Aguettaz AK, Castro-Sepulveda M, Ziegler DV, Lagarrigue S, Arribat Y, Martinotti A, Ebrahimi A, Daraspe J, Fajas L, Amati F. BCL2L13 at endoplasmic reticulum-mitochondria contact sites regulates calcium homeostasis to maintain skeletal muscle function. iScience 2024; 27:110510. [PMID: 39175772 PMCID: PMC11340602 DOI: 10.1016/j.isci.2024.110510] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Revised: 03/17/2024] [Accepted: 07/11/2024] [Indexed: 08/24/2024] Open
Abstract
The physical connection between mitochondria and endoplasmic reticulum (ER) is an essential signaling hub to ensure organelle and cellular functions. In skeletal muscle, ER-mitochondria calcium (Ca2+) signaling is crucial to maintain cellular homeostasis during physical activity. High expression of BCL2L13, a member of the BCL-2 family, was suggested as an adaptive response in endurance-trained human subjects. In adult zebrafish, we found that the loss of Bcl2l13 impairs skeletal muscle structure and function. Ca2+ signaling is altered in Bcl2l13 knockout animals and mitochondrial complexes activity is decreased. Organelle fractioning in mammalian cells shows BCL2L13 at mitochondria, ER, and mitochondria-associated membranes. ER-mitochondria contact sites number is not modified by BCL2L13 modulation, but knockdown of BCL2L13 in C2C12 cells changes cytosolic Ca2+ release and mitochondrial Ca2+ uptake. This suggests that BCL2L13 interaction with mitochondria and ER, and its role in Ca2+ signaling, contributes to proper skeletal muscle function.
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Affiliation(s)
- Dogan Grepper
- Aging and Muscle Metabolism Lab, Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, Bugnon 7, Lausanne, Vaud 1005, Switzerland
| | - Cassandra Tabasso
- Aging and Muscle Metabolism Lab, Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, Bugnon 7, Lausanne, Vaud 1005, Switzerland
| | - Nadège Zanou
- Institute of Sport Sciences, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Vaud 1015, Switzerland
| | - Axel K.F. Aguettaz
- Aging and Muscle Metabolism Lab, Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, Bugnon 7, Lausanne, Vaud 1005, Switzerland
- Service of Endocrinology, Diabetes and Metabolism, Lausanne University Hospital and University of Lausanne, Lausanne, Vaud 1011, Switzerland
| | - Mauricio Castro-Sepulveda
- Aging and Muscle Metabolism Lab, Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, Bugnon 7, Lausanne, Vaud 1005, Switzerland
| | - Dorian V. Ziegler
- Center for Integrative Genomics, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Vaud 1015, Switzerland
| | - Sylviane Lagarrigue
- Aging and Muscle Metabolism Lab, Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, Bugnon 7, Lausanne, Vaud 1005, Switzerland
| | - Yoan Arribat
- Aging and Muscle Metabolism Lab, Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, Bugnon 7, Lausanne, Vaud 1005, Switzerland
| | - Adrien Martinotti
- Aging and Muscle Metabolism Lab, Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, Bugnon 7, Lausanne, Vaud 1005, Switzerland
- Service of Endocrinology, Diabetes and Metabolism, Lausanne University Hospital and University of Lausanne, Lausanne, Vaud 1011, Switzerland
| | - Ammar Ebrahimi
- Aging and Muscle Metabolism Lab, Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, Bugnon 7, Lausanne, Vaud 1005, Switzerland
- Service of Endocrinology, Diabetes and Metabolism, Lausanne University Hospital and University of Lausanne, Lausanne, Vaud 1011, Switzerland
| | - Jean Daraspe
- Electron Microscopy Facility, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Vaud 1015, Switzerland
| | - Lluis Fajas
- Center for Integrative Genomics, Faculty of Biology and Medicine, University of Lausanne, Lausanne, Vaud 1015, Switzerland
| | - Francesca Amati
- Aging and Muscle Metabolism Lab, Department of Biomedical Sciences, Faculty of Biology and Medicine, University of Lausanne, Bugnon 7, Lausanne, Vaud 1005, Switzerland
- Service of Endocrinology, Diabetes and Metabolism, Lausanne University Hospital and University of Lausanne, Lausanne, Vaud 1011, Switzerland
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3
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O’Connor TN, Zhao N, Orciuoli HM, Brasile A, Pietrangelo L, He M, Groom L, Leigh J, Mahamed Z, Liang C, Malik S, Protasi F, Dirksen RT. Voluntary wheel running mitigates disease in an Orai1 gain-of-function mouse model of tubular aggregate myopathy. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.09.29.559036. [PMID: 37808709 PMCID: PMC10557777 DOI: 10.1101/2023.09.29.559036] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/10/2023]
Abstract
Tubular aggregate myopathy (TAM) is an inherited skeletal muscle disease associated with progressive muscle weakness, cramps, and myalgia. Tubular aggregates (TAs) are regular arrays of highly ordered and densely packed SR straight-tubes in muscle biopsies; the extensive presence of TAs represent a key histopathological hallmark of this disease in TAM patients. TAM is caused by gain-of-function mutations in proteins that coordinate store-operated Ca2+ entry (SOCE): STIM1 Ca2+ sensor proteins in the sarcoplasmic reticulum (SR) and Ca2+-permeable ORAI1 channels in the surface membrane. We have previously shown that voluntary wheel running (VWR) prevents formation of TAs in aging mice. Here, we assessed the therapeutic potential of endurance exercise (in the form of VWR) in mitigating the functional and structural alterations in a knock-in mouse model of TAM (Orai1G100S/+ or GS mice) based on a gain-of-function mutation in the ORAI1 pore. WT and GS mice were singly-housed for six months (from two to eight months of age) with either free-spinning or locked low profile wheels. Six months of VWR exercise significantly increased soleus peak tetanic specific force production, normalized FDB fiber Ca2+ store content, and markedly reduced TAs in EDL muscle from GS mice. Six months of VWR exercise normalized the expression of mitochondrial proteins found to be altered in soleus muscle of sedentary GS mice in conjunction with a signature of increased protein translation and biosynthetic processes. Parallel proteomic analyses of EDL muscles from sedentary WT and GS mice revealed changes in a tight network of pathways involved in formation of supramolecular complexes, which were also normalized following six months of VWR. In summary, sustained voluntary endurance exercise improved slow twitch muscle function, reduced the presence of TAs in fast twitch muscle, and normalized the muscle proteome of GS mice consistent with protective adaptions in proteostasis, mitochondrial structure/function, and formation of supramolecular complexes.
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Affiliation(s)
- Thomas N. O’Connor
- Department of Biomedical Genetics, Genetics and Genomics Graduate Program, University of Rochester Medical Center, Rochester, NY, USA
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY, USA
| | - Nan Zhao
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY, USA
| | - Haley M. Orciuoli
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY, USA
- Department of Biology, Biological Sciences, University of Rochester, Rochester, NY, USA
| | - Alice Brasile
- CAST, Center for Advanced Studies and Technology & DMSI, Department of Medicine and Aging Sciences, University G. d’Annunzio of Chieti-Pescara, I-66100 Chieti, Italy
| | - Laura Pietrangelo
- CAST, Center for Advanced Studies and Technology & DMSI, Department of Medicine and Aging Sciences, University G. d’Annunzio of Chieti-Pescara, I-66100 Chieti, Italy
| | - Miao He
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY, USA
| | - Linda Groom
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY, USA
| | - Jennifer Leigh
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY, USA
| | - Zahra Mahamed
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY, USA
| | - Chen Liang
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY, USA
| | - Sundeep Malik
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY, USA
| | - Feliciano Protasi
- CAST, Center for Advanced Studies and Technology & DMSI, Department of Medicine and Aging Sciences, University G. d’Annunzio of Chieti-Pescara, I-66100 Chieti, Italy
| | - Robert T. Dirksen
- Department of Pharmacology and Physiology, University of Rochester Medical Center, Rochester, NY, USA
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4
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MYTHO is a novel regulator of skeletal muscle autophagy and integrity. Nat Commun 2023; 14:1199. [PMID: 36864049 PMCID: PMC9981687 DOI: 10.1038/s41467-023-36817-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2022] [Accepted: 02/17/2023] [Indexed: 03/04/2023] Open
Abstract
Autophagy is a critical process in the regulation of muscle mass, function and integrity. The molecular mechanisms regulating autophagy are complex and still partly understood. Here, we identify and characterize a novel FoxO-dependent gene, d230025d16rik which we named Mytho (Macroautophagy and YouTH Optimizer), as a regulator of autophagy and skeletal muscle integrity in vivo. Mytho is significantly up-regulated in various mouse models of skeletal muscle atrophy. Short term depletion of MYTHO in mice attenuates muscle atrophy caused by fasting, denervation, cancer cachexia and sepsis. While MYTHO overexpression is sufficient to trigger muscle atrophy, MYTHO knockdown results in a progressive increase in muscle mass associated with a sustained activation of the mTORC1 signaling pathway. Prolonged MYTHO knockdown is associated with severe myopathic features, including impaired autophagy, muscle weakness, myofiber degeneration, and extensive ultrastructural defects, such as accumulation of autophagic vacuoles and tubular aggregates. Inhibition of the mTORC1 signaling pathway in mice using rapamycin treatment attenuates the myopathic phenotype triggered by MYTHO knockdown. Skeletal muscles from human patients diagnosed with myotonic dystrophy type 1 (DM1) display reduced Mytho expression, activation of the mTORC1 signaling pathway and impaired autophagy, raising the possibility that low Mytho expression might contribute to the progression of the disease. We conclude that MYTHO is a key regulator of muscle autophagy and integrity.
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Chivet M, McCluskey M, Nicot AS, Brocard J, Beaufils M, Giovannini D, Giannesini B, Poreau B, Brocard J, Humbert S, Saudou F, Fauré J, Marty I. Huntingtin regulates calcium fluxes in skeletal muscle. J Gen Physiol 2022; 155:213700. [PMID: 36409218 PMCID: PMC9682417 DOI: 10.1085/jgp.202213103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2022] [Revised: 09/09/2022] [Accepted: 09/03/2022] [Indexed: 11/22/2022] Open
Abstract
The expression of the Huntingtin protein, well known for its involvement in the neurodegenerative Huntington's disease, has been confirmed in skeletal muscle. The impact of HTT deficiency was studied in human skeletal muscle cell lines and in a mouse model with inducible and muscle-specific HTT deletion. Characterization of calcium fluxes in the knock-out cell lines demonstrated a reduction in excitation-contraction (EC) coupling, related to an alteration in the coupling between the dihydropyridine receptor and the ryanodine receptor, and an increase in the amount of calcium stored within the sarcoplasmic reticulum, linked to the hyperactivity of store-operated calcium entry (SOCE). Immunoprecipitation experiments demonstrated an association of HTT with junctophilin 1 (JPH1) and stromal interaction molecule 1 (STIM1), both providing clues on the functional effects of HTT deletion on calcium fluxes. Characterization of muscle strength and muscle anatomy of the muscle-specific HTT-KO mice demonstrated that HTT deletion induced moderate muscle weakness and mild muscle atrophy associated with histological abnormalities, similar to the phenotype observed in tubular aggregate myopathy. Altogether, this study points toward the hypotheses of the involvement of HTT in EC coupling via its interaction with JPH1, and on SOCE via its interaction with JPH1 and/or STIM1.
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Affiliation(s)
- Mathilde Chivet
- CHU Grenoble Alpes, Grenoble Institut Neurosciences, INSERM, U1216, Université Grenoble Alpes, Grenoble, France
| | - Maximilian McCluskey
- CHU Grenoble Alpes, Grenoble Institut Neurosciences, INSERM, U1216, Université Grenoble Alpes, Grenoble, France
| | - Anne Sophie Nicot
- CHU Grenoble Alpes, Grenoble Institut Neurosciences, INSERM, U1216, Université Grenoble Alpes, Grenoble, France
| | - Julie Brocard
- CHU Grenoble Alpes, Grenoble Institut Neurosciences, INSERM, U1216, Université Grenoble Alpes, Grenoble, France
| | - Mathilde Beaufils
- CHU Grenoble Alpes, Grenoble Institut Neurosciences, INSERM, U1216, Université Grenoble Alpes, Grenoble, France
| | - Diane Giovannini
- CHU Grenoble Alpes, Grenoble Institut Neurosciences, INSERM, U1216, Université Grenoble Alpes, Grenoble, France
| | - Benoit Giannesini
- Centre National de la Recherche Scientifique, Centre de Résonance Magnétique Biologique et Médicale, Aix Marseille University, Marseille, France
| | - Brice Poreau
- CHU Grenoble Alpes, Grenoble Institut Neurosciences, INSERM, U1216, Université Grenoble Alpes, Grenoble, France
| | - Jacques Brocard
- CHU Grenoble Alpes, Grenoble Institut Neurosciences, INSERM, U1216, Université Grenoble Alpes, Grenoble, France
| | - Sandrine Humbert
- CHU Grenoble Alpes, Grenoble Institut Neurosciences, INSERM, U1216, Université Grenoble Alpes, Grenoble, France
| | - Frédéric Saudou
- CHU Grenoble Alpes, Grenoble Institut Neurosciences, INSERM, U1216, Université Grenoble Alpes, Grenoble, France
| | - Julien Fauré
- CHU Grenoble Alpes, Grenoble Institut Neurosciences, INSERM, U1216, Université Grenoble Alpes, Grenoble, France
| | - Isabelle Marty
- CHU Grenoble Alpes, Grenoble Institut Neurosciences, INSERM, U1216, Université Grenoble Alpes, Grenoble, France,Correspondence to Isabelle Marty:
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6
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Rossi D, Catallo MR, Pierantozzi E, Sorrentino V. Mutations in proteins involved in E-C coupling and SOCE and congenital myopathies. J Gen Physiol 2022; 154:e202213115. [PMID: 35980353 PMCID: PMC9391951 DOI: 10.1085/jgp.202213115] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Revised: 07/15/2022] [Accepted: 07/21/2022] [Indexed: 11/24/2022] Open
Abstract
In skeletal muscle, Ca2+ necessary for muscle contraction is stored and released from the sarcoplasmic reticulum (SR), a specialized form of endoplasmic reticulum through the mechanism known as excitation-contraction (E-C) coupling. Following activation of skeletal muscle contraction by the E-C coupling mechanism, replenishment of intracellular stores requires reuptake of cytosolic Ca2+ into the SR by the activity of SR Ca2+-ATPases, but also Ca2+ entry from the extracellular space, through a mechanism called store-operated calcium entry (SOCE). The fine orchestration of these processes requires several proteins, including Ca2+ channels, Ca2+ sensors, and Ca2+ buffers, as well as the active involvement of mitochondria. Mutations in genes coding for proteins participating in E-C coupling and SOCE are causative of several myopathies characterized by a wide spectrum of clinical phenotypes, a variety of histological features, and alterations in intracellular Ca2+ balance. This review summarizes current knowledge on these myopathies and discusses available knowledge on the pathogenic mechanisms of disease.
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Affiliation(s)
- Daniela Rossi
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
- Interdepartmental Program of Molecular Diagnosis and Pathogenetic Mechanisms of Rare Genetic Diseases, Azienda Ospedaliero Universitaria Senese, Siena, Italy
| | - Maria Rosaria Catallo
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Enrico Pierantozzi
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Vincenzo Sorrentino
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
- Interdepartmental Program of Molecular Diagnosis and Pathogenetic Mechanisms of Rare Genetic Diseases, Azienda Ospedaliero Universitaria Senese, Siena, Italy
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7
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Sánchez-González C, Herrero Martín JC, Salegi Ansa B, Núñez de Arenas C, Stančič B, Pereira MP, Contreras L, Cuezva JM, Formentini L. Chronic inhibition of the mitochondrial ATP synthase in skeletal muscle triggers sarcoplasmic reticulum distress and tubular aggregates. Cell Death Dis 2022; 13:561. [PMID: 35732639 PMCID: PMC9217934 DOI: 10.1038/s41419-022-05016-z] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Revised: 06/03/2022] [Accepted: 06/09/2022] [Indexed: 01/21/2023]
Abstract
Tubular aggregates (TA) are honeycomb-like arrays of sarcoplasmic-reticulum (SR) tubules affecting aged glycolytic fibers of male individuals and inducing severe sarcomere disorganization and muscular pain. TA develop in skeletal muscle from Tubular Aggregate Myopathy (TAM) patients as well as in other disorders including endocrine syndromes, diabetes, and ageing, being their primary cause unknown. Nowadays, there is no cure for TA. Intriguingly, both hypoxia and calcium dyshomeostasis prompt TA formation, pointing to a possible role for mitochondria in their setting. However, a functional link between mitochondrial dysfunctions and TA remains unknown. Herein, we investigate the alteration in muscle-proteome of TAM patients, the molecular mechanism of TA onset and a potential therapy in a preclinical mouse model of the disease. We show that in vivo chronic inhibition of the mitochondrial ATP synthase in muscle causes TA. Upon long-term restrained oxidative phosphorylation (OXPHOS), oxidative soleus experiments a metabolic and structural switch towards glycolytic fibers, increases mitochondrial fission, and activates mitophagy to recycle damaged mitochondria. TA result from the overresponse of the fission controller DRP1, that upregulates the Store-Operate-Calcium-Entry and increases the mitochondria-SR interaction in a futile attempt to buffer calcium overloads upon prolonged OXPHOS inhibition. Accordingly, hypoxic muscles cultured ex vivo show an increase in mitochondria/SR contact sites and autophagic/mitophagic zones, where TA clusters grow around defective mitochondria. Moreover, hypoxia triggered a stronger TA formation upon ATP synthase inhibition, and this effect was reduced by the DRP1 inhibitor mDIVI. Remarkably, the muscle proteome of TAM patients displays similar alterations in mitochondrial dynamics and in ATP synthase contents. In vivo edaravone treatment in mice with restrained OXPHOS restored a healthy phenotype by prompting mitogenesis and mitochondrial fusion. Altogether, our data provide a functional link between the ATP synthase/DRP1 axis and the setting of TA, and repurpose edaravone as a possible treatment for TA-associated disorders.
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Affiliation(s)
- Cristina Sánchez-González
- grid.5515.40000000119578126Departamento de Biología Molecular, Centro de Biología Molecular ‘“Severo Ochoa’” (CBMSO), c/ Nicolás Cabrera 1, Universidad Autónoma de Madrid, Madrid, Spain
| | - Juan Cruz Herrero Martín
- grid.5515.40000000119578126Departamento de Biología Molecular, Centro de Biología Molecular ‘“Severo Ochoa’” (CBMSO), c/ Nicolás Cabrera 1, Universidad Autónoma de Madrid, Madrid, Spain
| | - Beñat Salegi Ansa
- grid.5515.40000000119578126Departamento de Biología Molecular, Centro de Biología Molecular ‘“Severo Ochoa’” (CBMSO), c/ Nicolás Cabrera 1, Universidad Autónoma de Madrid, Madrid, Spain
| | - Cristina Núñez de Arenas
- grid.5515.40000000119578126Departamento de Biología Molecular, Centro de Biología Molecular ‘“Severo Ochoa’” (CBMSO), c/ Nicolás Cabrera 1, Universidad Autónoma de Madrid, Madrid, Spain ,grid.452372.50000 0004 1791 1185Centro de Investigación Biomédica en red de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain
| | - Brina Stančič
- grid.5515.40000000119578126Departamento de Biología Molecular, Centro de Biología Molecular ‘“Severo Ochoa’” (CBMSO), c/ Nicolás Cabrera 1, Universidad Autónoma de Madrid, Madrid, Spain
| | - Marta P. Pereira
- grid.5515.40000000119578126Departamento de Biología Molecular, Centro de Biología Molecular ‘“Severo Ochoa’” (CBMSO), c/ Nicolás Cabrera 1, Universidad Autónoma de Madrid, Madrid, Spain ,grid.5515.40000000119578126Instituto Universitario de Biología Molecular, IUBM, Universidad Autónoma de Madrid, Madrid, Spain
| | - Laura Contreras
- grid.5515.40000000119578126Departamento de Biología Molecular, Centro de Biología Molecular ‘“Severo Ochoa’” (CBMSO), c/ Nicolás Cabrera 1, Universidad Autónoma de Madrid, Madrid, Spain ,grid.5515.40000000119578126Instituto Universitario de Biología Molecular, IUBM, Universidad Autónoma de Madrid, Madrid, Spain ,grid.419651.e0000 0000 9538 1950Instituto de Investigaciones Sanitarias Fundación Jiménez Díaz (IIS-FJD), Madrid, Spain
| | - José M. Cuezva
- grid.5515.40000000119578126Departamento de Biología Molecular, Centro de Biología Molecular ‘“Severo Ochoa’” (CBMSO), c/ Nicolás Cabrera 1, Universidad Autónoma de Madrid, Madrid, Spain ,grid.452372.50000 0004 1791 1185Centro de Investigación Biomédica en red de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain ,grid.5515.40000000119578126Instituto Universitario de Biología Molecular, IUBM, Universidad Autónoma de Madrid, Madrid, Spain ,grid.512044.60000 0004 7666 5367Instituto de Investigación Hospital 12 de Octubre, i+12, Madrid, Spain
| | - Laura Formentini
- grid.5515.40000000119578126Departamento de Biología Molecular, Centro de Biología Molecular ‘“Severo Ochoa’” (CBMSO), c/ Nicolás Cabrera 1, Universidad Autónoma de Madrid, Madrid, Spain ,grid.452372.50000 0004 1791 1185Centro de Investigación Biomédica en red de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain ,grid.5515.40000000119578126Instituto Universitario de Biología Molecular, IUBM, Universidad Autónoma de Madrid, Madrid, Spain ,grid.512044.60000 0004 7666 5367Instituto de Investigación Hospital 12 de Octubre, i+12, Madrid, Spain
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8
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Vattemi GNA, Rossi D, Galli L, Catallo MR, Pancheri E, Marchetto G, Cisterna B, Malatesta M, Pierantozzi E, Tonin P, Sorrentino V. Ryanodine receptor 1 (RYR1) mutations in two patients with tubular aggregate myopathy. Eur J Neurosci 2022; 56:4214-4223. [PMID: 35666680 PMCID: PMC9539902 DOI: 10.1111/ejn.15728] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2021] [Revised: 05/24/2022] [Accepted: 05/24/2022] [Indexed: 11/30/2022]
Abstract
Two likely causative mutations in the RYR1 gene were identified in two patients with myopathy with tubular aggregates, but no evidence of cores or core‐like pathology on muscle biopsy. These patients were clinically evaluated and underwent routine laboratory investigations, electrophysiologic tests, muscle biopsy and muscle magnetic resonance imaging (MRI). They reported stiffness of the muscles following sustained activity or cold exposure and had serum creatine kinase elevation. The identified RYR1 mutations (p.Thr2206Met or p.Gly2434Arg, in patient 1 and patient 2, respectively) were previously identified in individuals with malignant hyperthermia susceptibility and are reported as causative according to the European Malignant Hyperthermia Group rules. To our knowledge, these data represent the first identification of causative mutations in the RYR1 gene in patients with tubular aggregate myopathy and extend the spectrum of histological alterations caused by mutation in the RYR1 gene.
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Affiliation(s)
- Gaetano Nicola Alfio Vattemi
- Department of Neurosciences, Biomedicine and Movement Sciences, Section of Clinical Neurology, University of Verona, Verona, Italy
| | - Daniela Rossi
- Department of Molecular and Developmental Medicine, Molecular Medicine Section, University of Siena, Siena, Italy.,Interdepartmental Program of Molecular Diagnosis and Pathogenetic Mechanisms of Rare Genetic Diseases, Azienda Ospedaliero Universitaria Senese, Siena, Italy
| | - Lucia Galli
- Interdepartmental Program of Molecular Diagnosis and Pathogenetic Mechanisms of Rare Genetic Diseases, Azienda Ospedaliero Universitaria Senese, Siena, Italy
| | - Maria Rosaria Catallo
- Department of Molecular and Developmental Medicine, Molecular Medicine Section, University of Siena, Siena, Italy
| | - Elia Pancheri
- Department of Neurosciences, Biomedicine and Movement Sciences, Section of Clinical Neurology, University of Verona, Verona, Italy
| | - Giulia Marchetto
- Department of Neurosciences, Biomedicine and Movement Sciences, Section of Clinical Neurology, University of Verona, Verona, Italy
| | - Barbara Cisterna
- Department of Neurosciences, Biomedicine and Movement Sciences, Section of Anatomy and Histology, University of Verona, Verona, Italy
| | - Manuela Malatesta
- Department of Neurosciences, Biomedicine and Movement Sciences, Section of Anatomy and Histology, University of Verona, Verona, Italy
| | - Enrico Pierantozzi
- Department of Molecular and Developmental Medicine, Molecular Medicine Section, University of Siena, Siena, Italy
| | - Paola Tonin
- Department of Neurosciences, Biomedicine and Movement Sciences, Section of Anatomy and Histology, University of Verona, Verona, Italy
| | - Vincenzo Sorrentino
- Department of Molecular and Developmental Medicine, Molecular Medicine Section, University of Siena, Siena, Italy.,Interdepartmental Program of Molecular Diagnosis and Pathogenetic Mechanisms of Rare Genetic Diseases, Azienda Ospedaliero Universitaria Senese, Siena, Italy
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9
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Gang Q, Bettencourt C, Brady S, Holton JL, Healy EG, McConville J, Morrison PJ, Ripolone M, Violano R, Sciacco M, Moggio M, Mora M, Mantegazza R, Zanotti S, Wang Z, Yuan Y, Liu WW, Beeson D, Hanna M, Houlden H. Genetic defects are common in myopathies with tubular aggregates. Ann Clin Transl Neurol 2021; 9:4-15. [PMID: 34908252 PMCID: PMC8791796 DOI: 10.1002/acn3.51477] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2021] [Revised: 10/12/2021] [Accepted: 10/27/2021] [Indexed: 12/17/2022] Open
Abstract
Objective A group of genes have been reported to be associated with myopathies with tubular aggregates (TAs). Many cases with TAs still lack of genetic clarification. This study aims to explore the genetic background of cases with TAs in order to improve our knowledge of the pathogenesis of these rare pathological structures. Methods Thirty‐three patients including two family members with biopsy confirmed TAs were collected. Whole‐exome sequencing was performed on 31 unrelated index patients and a candidate gene search strategy was conducted. The identified variants were confirmed by Sanger sequencing. The wild‐type and the mutant p.Ala11Thr of ALG14 were transfected into human embryonic kidney 293 cells (HEK293), and western blot analysis was performed to quantify protein expression levels. Results Eleven index cases (33%) were found to have pathogenic variant or likely pathogenic variants in STIM1, ORAI1, PGAM2, SCN4A, CASQ1 and ALG14. Among them, the c.764A>T (p.Glu255Val) in STIM1 and the c.1333G>C (p.Val445Leu) in SCN4A were novel. Western blot analysis showed that the expression of ALG14 protein was severely reduced in the mutant ALG14 HEK293 cells (p.Ala11Thr) compared with wild type. The ALG14 variants might be associated with TAs in patients with complex multisystem disorders. Interpretation This study expands the phenotypic and genotypic spectrums of myopathies with TAs. Our findings further confirm previous hypothesis that genes related with calcium signalling pathway and N‐linked glycosylation pathway are the main genetic causes of myopathies with TAs.
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Affiliation(s)
- Qiang Gang
- Department of Neurology, Peking University First Hospital, 8 Xishiku Street, Xicheng District, Beijing, 100034, China.,Beijing Key Laboratory of Neurovascular Disease Discovery, Beijing, 100034, China.,Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, Queen Square, London, UK.,MRC Centre for Neuromuscular Diseases, UCL Queen Square Institute of Neurology, Queen Square, London, UK
| | - Conceição Bettencourt
- Queen Square Brain Bank for Neurological Disorders, London, UK.,Department of Neurodegenerative Disease, UCL Queen Square Institute of Neurology, Queen Square, London, UK
| | - Stefen Brady
- Oxford Muscle Service, John Radcliffe Hospital, Oxford, UK
| | - Janice L Holton
- MRC Centre for Neuromuscular Diseases, UCL Queen Square Institute of Neurology, Queen Square, London, UK.,Queen Square Brain Bank for Neurological Disorders, London, UK
| | - Estelle G Healy
- Department of Neuropathology, Royal Victoria Hospital, Belfast, Northern Ireland
| | - John McConville
- Department of Neurology, Belfast City Hospital, Belfast, BT9 7AB, UK
| | - Patrick J Morrison
- Department of Genetic Medicine, Belfast City Hospital, Belfast, BT9 7AB, UK
| | - Michela Ripolone
- Neuromuscular and Rare Diseases Unit, Department of Neuroscience, IRCCS Foundation Ca' Granda Ospedale Maggiore Policlinico, Dino Ferrari Centre, University of Milan, Milan, Italy
| | - Raffaella Violano
- Neuromuscular and Rare Diseases Unit, Department of Neuroscience, IRCCS Foundation Ca' Granda Ospedale Maggiore Policlinico, Dino Ferrari Centre, University of Milan, Milan, Italy
| | - Monica Sciacco
- Neuromuscular and Rare Diseases Unit, Department of Neuroscience, IRCCS Foundation Ca' Granda Ospedale Maggiore Policlinico, Dino Ferrari Centre, University of Milan, Milan, Italy
| | - Maurizio Moggio
- Neuromuscular and Rare Diseases Unit, Department of Neuroscience, IRCCS Foundation Ca' Granda Ospedale Maggiore Policlinico, Dino Ferrari Centre, University of Milan, Milan, Italy
| | - Marina Mora
- Neuromuscular Diseases and Neuroimmunology Unit, Fondazione IRCCS Isitituto Neurologico C. Besta, Milano, Italy
| | - Renato Mantegazza
- Neuromuscular Diseases and Neuroimmunology Unit, Fondazione IRCCS Isitituto Neurologico C. Besta, Milano, Italy
| | - Simona Zanotti
- Neuromuscular Diseases and Neuroimmunology Unit, Fondazione IRCCS Isitituto Neurologico C. Besta, Milano, Italy
| | - Zhaoxia Wang
- Department of Neurology, Peking University First Hospital, 8 Xishiku Street, Xicheng District, Beijing, 100034, China.,Beijing Key Laboratory of Neurovascular Disease Discovery, Beijing, 100034, China
| | - Yun Yuan
- Department of Neurology, Peking University First Hospital, 8 Xishiku Street, Xicheng District, Beijing, 100034, China.,Beijing Key Laboratory of Neurovascular Disease Discovery, Beijing, 100034, China
| | - Wei-Wei Liu
- Neurosciences Group, Nuffield Department of Clinical Neurosciences, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - David Beeson
- Neurosciences Group, Nuffield Department of Clinical Neurosciences, Weatherall Institute of Molecular Medicine, University of Oxford, Oxford, UK
| | - Michael Hanna
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, Queen Square, London, UK.,MRC Centre for Neuromuscular Diseases, UCL Queen Square Institute of Neurology, Queen Square, London, UK
| | - Henry Houlden
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, Queen Square, London, UK.,MRC Centre for Neuromuscular Diseases, UCL Queen Square Institute of Neurology, Queen Square, London, UK.,Neurogenetics Laboratory, UCL Queen Square Institute of Neurology, Queen Square, WC1N 3BG, London, UK
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10
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Zhang H, Bryson VG, Wang C, Li T, Kerr JP, Wilson R, Muoio DM, Bloch RJ, Ward C, Rosenberg PB. Desmin interacts with STIM1 and coordinates Ca2+ signaling in skeletal muscle. JCI Insight 2021; 6:143472. [PMID: 34494555 PMCID: PMC8492340 DOI: 10.1172/jci.insight.143472] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2020] [Accepted: 07/28/2021] [Indexed: 12/30/2022] Open
Abstract
Stromal interaction molecule 1 (STIM1), the sarcoplasmic reticulum (SR) transmembrane protein, activates store-operated Ca2+ entry (SOCE) in skeletal muscle and, thereby, coordinates Ca2+ homeostasis, Ca2+-dependent gene expression, and contractility. STIM1 occupies space in the junctional SR membrane of the triads and the longitudinal SR at the Z-line. How STIM1 is organized and is retained in these specific subdomains of the SR is unclear. Here, we identified desmin, the major type III intermediate filament protein in muscle, as a binding partner for STIM1 based on a yeast 2-hybrid screen. Validation of the desmin-STIM1 interaction by immunoprecipitation and immunolocalization confirmed that the CC1-SOAR domains of STIM1 interact with desmin to enhance STIM1 oligomerization yet limit SOCE. Based on our studies of desmin-KO mice, we developed a model wherein desmin connected STIM1 at the Z-line in order to regulate the efficiency of Ca2+ refilling of the SR. Taken together, these studies showed that desmin-STIM1 assembles a cytoskeletal-SR connection that is important for Ca2+ signaling in skeletal muscle.
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Affiliation(s)
- Hengtao Zhang
- Department of Medicine and
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, North Carolina, USA
| | - Victoria Graham Bryson
- Department of Medicine and
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, North Carolina, USA
| | - Chaojian Wang
- Department of Medicine and
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, North Carolina, USA
| | - TianYu Li
- Department of Medicine and
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, North Carolina, USA
| | - Jaclyn P. Kerr
- Department of Physiology and
- Department of Orthopedic Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Rebecca Wilson
- Department of Medicine and
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, North Carolina, USA
| | - Deborah M. Muoio
- Department of Medicine and
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, North Carolina, USA
| | - Robert J. Bloch
- Department of Physiology and
- Department of Orthopedic Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Christopher Ward
- Department of Physiology and
- Department of Orthopedic Surgery, University of Maryland School of Medicine, Baltimore, Maryland, USA
| | - Paul B. Rosenberg
- Department of Medicine and
- Duke Molecular Physiology Institute, Duke University School of Medicine, Durham, North Carolina, USA
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11
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Protasi F, Pietrangelo L, Boncompagni S. Improper Remodeling of Organelles Deputed to Ca 2+ Handling and Aerobic ATP Production Underlies Muscle Dysfunction in Ageing. Int J Mol Sci 2021; 22:6195. [PMID: 34201319 PMCID: PMC8228829 DOI: 10.3390/ijms22126195] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Revised: 06/01/2021] [Accepted: 06/02/2021] [Indexed: 12/28/2022] Open
Abstract
Proper skeletal muscle function is controlled by intracellular Ca2+ concentration and by efficient production of energy (ATP), which, in turn, depend on: (a) the release and re-uptake of Ca2+ from sarcoplasmic-reticulum (SR) during excitation-contraction (EC) coupling, which controls the contraction and relaxation of sarcomeres; (b) the uptake of Ca2+ into the mitochondrial matrix, which stimulates aerobic ATP production; and finally (c) the entry of Ca2+ from the extracellular space via store-operated Ca2+ entry (SOCE), a mechanism that is important to limit/delay muscle fatigue. Abnormalities in Ca2+ handling underlie many physio-pathological conditions, including dysfunction in ageing. The specific focus of this review is to discuss the importance of the proper architecture of organelles and membrane systems involved in the mechanisms introduced above for the correct skeletal muscle function. We reviewed the existing literature about EC coupling, mitochondrial Ca2+ uptake, SOCE and about the structural membranes and organelles deputed to those functions and finally, we summarized the data collected in different, but complementary, projects studying changes caused by denervation and ageing to the structure and positioning of those organelles: a. denervation of muscle fibers-an event that contributes, to some degree, to muscle loss in ageing (known as sarcopenia)-causes misplacement and damage: (i) of membrane structures involved in EC coupling (calcium release units, CRUs) and (ii) of the mitochondrial network; b. sedentary ageing causes partial disarray/damage of CRUs and of calcium entry units (CEUs, structures involved in SOCE) and loss/misplacement of mitochondria; c. functional electrical stimulation (FES) and regular exercise promote the rescue/maintenance of the proper architecture of CRUs, CEUs, and of mitochondria in both denervation and ageing. All these structural changes were accompanied by related functional changes, i.e., loss/decay in function caused by denervation and ageing, and improved function following FES or exercise. These data suggest that the integrity and proper disposition of intracellular organelles deputed to Ca2+ handling and aerobic generation of ATP is challenged by inactivity (or reduced activity); modifications in the architecture of these intracellular membrane systems may contribute to muscle dysfunction in ageing and sarcopenia.
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Affiliation(s)
- Feliciano Protasi
- CAST, Center for Advanced Studies and Technology, University G. d’Annunzio of Chieti-Pescara, I-66100 Chieti, Italy; (L.P.); (S.B.)
- DMSI, Department of Medicine and Aging Sciences, University G. d’Annunzio of Chieti-Pescara, I-66100 Chieti, Italy
| | - Laura Pietrangelo
- CAST, Center for Advanced Studies and Technology, University G. d’Annunzio of Chieti-Pescara, I-66100 Chieti, Italy; (L.P.); (S.B.)
- DMSI, Department of Medicine and Aging Sciences, University G. d’Annunzio of Chieti-Pescara, I-66100 Chieti, Italy
| | - Simona Boncompagni
- CAST, Center for Advanced Studies and Technology, University G. d’Annunzio of Chieti-Pescara, I-66100 Chieti, Italy; (L.P.); (S.B.)
- DNICS, Department of Neuroscience and Clinical Sciences, University G. d’Annunzio of Chieti-Pescara, I-66100 Chieti, Italy
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12
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Salvi A, Maues De Paula A, Lévy N, Attarian S, Bartoli M. Commentary: Long-Term Exercise Reduces Formation of Tubular Aggregates and Promotes Maintenance of Ca 2+ Entry Units in Aged Muscle. Front Physiol 2021; 12:663677. [PMID: 33868028 PMCID: PMC8047298 DOI: 10.3389/fphys.2021.663677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Accepted: 03/09/2021] [Indexed: 11/13/2022] Open
Affiliation(s)
- Alexandra Salvi
- Aix Marseille Univ, INSERM, Marseille Medical Genetics, Marseille, France
| | - André Maues De Paula
- Aix Marseille Univ, INSERM, Marseille Medical Genetics, Marseille, France.,Department of Anatomopathology, CHU La Timone, Marseille, France
| | - Nicolas Lévy
- Aix Marseille Univ, INSERM, Marseille Medical Genetics, Marseille, France.,Department of Medical Genetics, La Timone Children's Hospital, Marseille, France
| | - Shahram Attarian
- Aix Marseille Univ, INSERM, Marseille Medical Genetics, Marseille, France.,Reference Center for Neuromuscular Disease and ALS, Marseille, France
| | - Marc Bartoli
- Aix Marseille Univ, INSERM, Marseille Medical Genetics, Marseille, France
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13
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Silva-Rojas R, Laporte J, Böhm J. STIM1/ ORAI1 Loss-of-Function and Gain-of-Function Mutations Inversely Impact on SOCE and Calcium Homeostasis and Cause Multi-Systemic Mirror Diseases. Front Physiol 2020; 11:604941. [PMID: 33250786 PMCID: PMC7672041 DOI: 10.3389/fphys.2020.604941] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Accepted: 10/15/2020] [Indexed: 12/19/2022] Open
Abstract
Store-operated Ca2+ entry (SOCE) is a ubiquitous and essential mechanism regulating Ca2+ homeostasis in all tissues, and controls a wide range of cellular functions including keratinocyte differentiation, osteoblastogenesis and osteoclastogenesis, T cell proliferation, platelet activation, and muscle contraction. The main SOCE actors are STIM1 and ORAI1. Depletion of the reticular Ca2+ stores induces oligomerization of the luminal Ca2+ sensor STIM1, and the oligomers activate the plasma membrane Ca2+ channel ORAI1 to trigger extracellular Ca2+ entry. Mutations in STIM1 and ORAI1 result in abnormal SOCE and lead to multi-systemic disorders. Recessive loss-of-function mutations are associated with CRAC (Ca2+ release-activated Ca2+) channelopathy, involving immunodeficiency and autoimmunity, muscular hypotonia, ectodermal dysplasia, and mydriasis. In contrast, dominant STIM1 and ORAI1 gain-of-function mutations give rise to tubular aggregate myopathy and Stormorken syndrome (TAM/STRMK), forming a clinical spectrum encompassing muscle weakness, thrombocytopenia, ichthyosis, hyposplenism, short stature, and miosis. Functional studies on patient-derived cells revealed that CRAC channelopathy mutations impair SOCE and extracellular Ca2+ influx, while TAM/STRMK mutations induce excessive Ca2+ entry through SOCE over-activation. In accordance with the opposite pathomechanisms underlying both disorders, CRAC channelopathy and TAM/STRMK patients show mirror phenotypes at the clinical and molecular levels, and the respective animal models recapitulate the skin, bones, immune system, platelet, and muscle anomalies. Here we review and compare the clinical presentations of CRAC channelopathy and TAM/STRMK patients and the histological and molecular findings obtained on human samples and murine models to highlight the mirror phenotypes in different tissues, and to point out potentially undiagnosed anomalies in patients, which may be relevant for disease management and prospective therapeutic approaches.
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Affiliation(s)
- Roberto Silva-Rojas
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Inserm U1258, CNRS UMR 7104, Université de Strasbourg, Illkirch, France
| | - Jocelyn Laporte
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Inserm U1258, CNRS UMR 7104, Université de Strasbourg, Illkirch, France
| | - Johann Böhm
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Inserm U1258, CNRS UMR 7104, Université de Strasbourg, Illkirch, France
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14
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Peche GA, Spiegelhalter C, Silva-Rojas R, Laporte J, Böhm J. Functional analyses of STIM1 mutations reveal a common pathomechanism for tubular aggregate myopathy and Stormorken syndrome. Neuropathology 2020; 40:559-569. [PMID: 33073872 DOI: 10.1111/neup.12692] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 05/01/2020] [Accepted: 05/18/2020] [Indexed: 11/30/2022]
Abstract
Tubular aggregate myopathy (TAM) is a progressive disorder characterized by muscle weakness, cramps, and myalgia. TAM clinically overlaps with Stormorken syndrome (STRMK), combining TAM with miosis, thrombocytopenia, hyposplenism, ichthyosis, short stature, and dyslexia. TAM and STRMK arise from gain-of-function mutations in STIM1 (stromal interaction molecule 1) or ORAI1, both encoding key regulators of Ca2+ homeostasis, and mutations in either gene result in excessive extracellular Ca2+ entry. The pathomechanistic similarities and differences between TAM and STRMK are only partially understood. Here we provide functional in vitro experiments demonstrating that STIM1 harboring the TAM D84G or the STRMK R304W mutation similarly cluster and exert a dominant effect on the wild-type protein. Both mutants recruit ORAI1 to the clusters, increase cytosolic Ca2+ levels, promote major nuclear import of the Ca2+ -dependent transcription factor NFAT (nuclear factor of activated T cells), and trigger the formation of circular membrane stacks. In conclusion, the analyzed TAM and STRMK mutations have a comparable impact on STIM1 protein function and downstream effects of excessive Ca2+ entry, highlighting that TAM and STRMK involve a common pathomechanism.
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Affiliation(s)
- Georges Arielle Peche
- Department of Translational Medicine and Neurogenetics, Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,University of Strasbourg, Illkirch, France
| | - Coralie Spiegelhalter
- Department of Translational Medicine and Neurogenetics, Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,University of Strasbourg, Illkirch, France
| | - Roberto Silva-Rojas
- Department of Translational Medicine and Neurogenetics, Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,University of Strasbourg, Illkirch, France
| | - Jocelyn Laporte
- Department of Translational Medicine and Neurogenetics, Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,University of Strasbourg, Illkirch, France
| | - Johann Böhm
- Department of Translational Medicine and Neurogenetics, Institute of Genetics and Molecular and Cellular Biology (IGBMC), Illkirch, France.,INSERM U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,University of Strasbourg, Illkirch, France
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15
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Protasi F, Pietrangelo L, Boncompagni S. Calcium entry units (CEUs): perspectives in skeletal muscle function and disease. J Muscle Res Cell Motil 2020; 42:233-249. [PMID: 32812118 PMCID: PMC8332569 DOI: 10.1007/s10974-020-09586-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Accepted: 08/03/2020] [Indexed: 12/28/2022]
Abstract
In the last decades the term Store-operated Ca2+ entry (SOCE) has been used in the scientific literature to describe an ubiquitous cellular mechanism that allows recovery of calcium (Ca2+) from the extracellular space. SOCE is triggered by a reduction of Ca2+ content (i.e. depletion) in intracellular stores, i.e. endoplasmic or sarcoplasmic reticulum (ER and SR). In skeletal muscle the mechanism is primarily mediated by a physical interaction between stromal interaction molecule-1 (STIM1), a Ca2+ sensor located in the SR membrane, and ORAI1, a Ca2+-permeable channel of external membranes, located in transverse tubules (TTs), the invaginations of the plasma membrane (PM) deputed to propagation of action potentials. It is generally accepted that in skeletal muscle SOCE is important to limit muscle fatigue during repetitive stimulation. We recently discovered that exercise promotes the assembly of new intracellular junctions that contains colocalized STIM1 and ORAI1, and that the presence of these new junctions increases Ca2+ entry via ORAI1, while improving fatigue resistance during repetitive stimulation. Based on these findings we named these new junctions Ca2+ Entry Units (CEUs). CEUs are dynamic organelles that assemble during muscle activity and disassemble during recovery thanks to the plasticity of the SR (containing STIM1) and the elongation/retraction of TTs (bearing ORAI1). Interestingly, similar structures described as SR stacks were previously reported in different mouse models carrying mutations in proteins involved in Ca2+ handling (calsequestrin-null mice; triadin and junctin null mice, etc.) or associated to microtubules (MAP6 knockout mice). Mutations in Stim1 and Orai1 (and calsequestrin-1) genes have been associated to tubular aggregate myopathy (TAM), a muscular disease characterized by: (a) muscle pain, cramping, or weakness that begins in childhood and worsens over time, and (b) the presence of large accumulations of ordered SR tubes (tubular aggregates, TAs) that do not contain myofibrils, mitochondria, nor TTs. Interestingly, TAs are also present in fast twitch muscle fibers of ageing mice. Several important issues remain un-answered: (a) the molecular mechanisms and signals that trigger the remodeling of membranes and the functional activation of SOCE during exercise are unclear; and (b) how dysfunctional SOCE and/or mutations in Stim1, Orai1 and calsequestrin (Casq1) genes lead to the formation of tubular aggregates (TAs) in aging and disease deserve investigation.
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Affiliation(s)
- Feliciano Protasi
- CAST, Center for Advanced Studies and Technology, University G. d'Annunzio of Chieti-Pescara, 66100, Chieti, Italy.
- DMSI, Department of Medicine and Aging Sciences, University G. d'Annunzio of Chieti-Pescara, 66100, Chieti, Italy.
| | - Laura Pietrangelo
- CAST, Center for Advanced Studies and Technology, University G. d'Annunzio of Chieti-Pescara, 66100, Chieti, Italy
- DMSI, Department of Medicine and Aging Sciences, University G. d'Annunzio of Chieti-Pescara, 66100, Chieti, Italy
| | - Simona Boncompagni
- CAST, Center for Advanced Studies and Technology, University G. d'Annunzio of Chieti-Pescara, 66100, Chieti, Italy
- DNICS, Department of Neuroscience, Imaging and Clinical Sciences, University G. d'Annunzio of Chieti-Pescara, 66100, Chieti, Italy
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16
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Sayed RKA, Fernández-Ortiz M, Diaz-Casado ME, Aranda-Martínez P, Fernández-Martínez J, Guerra-Librero A, Escames G, López LC, Alsaadawy RM, Acuña-Castroviejo D. Lack of NLRP3 Inflammasome Activation Reduces Age-Dependent Sarcopenia and Mitochondrial Dysfunction, Favoring the Prophylactic Effect of Melatonin. J Gerontol A Biol Sci Med Sci 2020; 74:1699-1708. [PMID: 30869745 DOI: 10.1093/gerona/glz079] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Indexed: 12/20/2022] Open
Abstract
To investigate the role of NLRP3 inflammasome in muscular aging, we evaluated here the morphological and functional markers of sarcopenia in the NLRP3-knockout mice, as well as the beneficial effect of melatonin supplementation. The gastrocnemius muscles of young (3 months), early-aged (12 months), and old-aged (24 months) NLRP3-knockout female mice were examined. Moreover, locomotor activity and apoptosis were assessed. The results revealed early markers of sarcopenia at the age of 12 months, including reduction of lactate, ratio of muscle weight to body weight, muscle fibers number, and mitochondrial number. Increased interstitial tissues, apoptosis, and muscle fibers area, as well as mitochondrial damage were detected, with little muscular activity effects. In the old-aged, these alterations progressed with a reduction in locomotor activity, mitochondrial cristae destruction, nuclear fragmentation, tubular aggregates (TAs) formation, and increased frailty index. Oral melatonin supplementation preserved the normal muscular structure, muscle fibers number, and muscular activity in old age. Melatonin enhanced lactate production, recovered mitochondria, inhibited TAs formation, reduced apoptosis, and normalized frailty index. The fewer sarcopenic changes as well as the highly detectable prophylactic effects of melatonin treatment reported here in the muscle of NLRP3-knockout mice comparing with that previously detected in wild-type mice, confirming NLRP3 inflammasome implication in muscular aging and sarcopenia onset and progression.
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Affiliation(s)
- Ramy K A Sayed
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain.,Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Sohag University, Egypt
| | - Marisol Fernández-Ortiz
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain.,Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, Spain
| | - María E Diaz-Casado
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain.,Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, Spain
| | - Paula Aranda-Martínez
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain.,Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, Spain
| | - José Fernández-Martínez
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain.,Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, Spain
| | - Ana Guerra-Librero
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain.,Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, Spain
| | - Germaine Escames
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain.,Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, Spain.,CIBER de Fragilidad y Envejecimiento, Ibs. Granada, Unidad de Gestión Clínica de Laboratorios Clínicos, Complejo Hospitalario de Granada, Spain
| | - Luis C López
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain.,Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, Spain.,CIBER de Fragilidad y Envejecimiento, Ibs. Granada, Unidad de Gestión Clínica de Laboratorios Clínicos, Complejo Hospitalario de Granada, Spain
| | - Reem M Alsaadawy
- Department of Animal Hygiene and Zoonoses, Faculty of Veterinary Medicine, Assiut University, Egypt
| | - Darío Acuña-Castroviejo
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain.,Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, Spain.,CIBER de Fragilidad y Envejecimiento, Ibs. Granada, Unidad de Gestión Clínica de Laboratorios Clínicos, Complejo Hospitalario de Granada, Spain
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17
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Toniolo L, Formoso L, Torelli L, Crea E, Bergamo A, Sava G, Giacomello E. Long-term resveratrol treatment improves the capillarization in the skeletal muscles of ageing C57BL/6J mice. Int J Food Sci Nutr 2020; 72:37-44. [PMID: 32449407 DOI: 10.1080/09637486.2020.1769569] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
We recently showed that the treatment with Resveratrol (RES) contrasts the effects of ageing on the skeletal muscle (SKM), reduces the appearance of tubular aggregates (TAs), and improves the fatigue resistance. Since fatigue resistance depends on the SKM capillary network, and RES has been described to improve vascularisation, we analysed the SKM capillarization in naturally ageing C57BL/6J male mice, fed with 0.04% RES in the diet for 6 months, which showed a better fatigue resistance in a previous work. Our data show an inverse correlation between the number of capillaries per fibre (CAF) and TAs in both control and treated type IIB fibres, and an increase of CAF in ageing SKM upon RES-treatment. The present work suggests that capillarization is one of the determinants of the development of TAs and fatigue resistance, and that RES can be considered a good candidate to counteract capillary rarefaction in the SKM tissue.
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Affiliation(s)
- Luana Toniolo
- Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Luca Formoso
- Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - Lucio Torelli
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy
| | - Emanuela Crea
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy
| | - Alberta Bergamo
- Callerio Foundation Onlus, Trieste, Italy.,Department of Life Sciences, University of Trieste, Trieste, Italy
| | - Gianni Sava
- Callerio Foundation Onlus, Trieste, Italy.,Department of Life Sciences, University of Trieste, Trieste, Italy
| | - Emiliana Giacomello
- Department of Medicine, Surgery and Health Sciences, University of Trieste, Trieste, Italy
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18
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Igura S, Nagatani M, Kasahara K, Andoh R, Fukunaga Y, Hashiguchi O, Okazaki S, Yamaguchi Y. Pathological study of tubular aggregates occurring spontaneously in the skeletal muscles of non-obese diabetic/Cg -PrkdcscidIl2rgtm1sug /ShiJic (NOG) mice. J Toxicol Pathol 2020; 33:115-119. [PMID: 32425344 PMCID: PMC7218234 DOI: 10.1293/tox.2019-0079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2019] [Accepted: 12/26/2019] [Indexed: 11/19/2022] Open
Abstract
To examine the biological and morphological features of tubular aggregates (TAs) in the
skeletal muscles of non-obese
diabetic/Cg-PrkdcscidIl2rgtm1Sug/ShiJic (NOG)
mice, 73 male and 72 female specific-pathogen-free NOG mice were examined at 7, 18, 22,
26, and 52 weeks of age. TAs were observed as intracytoplasmic eosinophilic materials of
the femoral muscles in males at 18, 22, 26, and 52 weeks of age and in females at 52 weeks
of age; gender-related differences were noted in the onset time and lesion degree.
Intracytoplasmic materials were positive for Gomori’s trichrome stain. Electron microscopy
revealed that TAs were composed of an accumulation of dilated sarcoplasmic reticulum. In
addition, TAs were observed in the femoral and gastrocnemius muscles, but not in the
soleus and diaphragm muscles, suggesting that TAs are present in fast muscle fibers. The
morphology of TAs and the type of myofibers involved, as well as the gender difference in
NOG mice were essentially the same as those of TAs observed in C57BL/6J and MRL+/+
mice.
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Affiliation(s)
- Saori Igura
- Gotemba Laboratory, BoZo Research Center Inc., 1284 Kamado, Gotemba, Shizuoka 412-0039, Japan
| | - Mariko Nagatani
- Gotemba Laboratory, BoZo Research Center Inc., 1284 Kamado, Gotemba, Shizuoka 412-0039, Japan
| | - Kenichiro Kasahara
- Tsukuba Research Institute, BoZo Research Center Inc., 8 Okubo, Tsukuba, Ibaraki 300-2611, Japan
| | - Rie Andoh
- Gotemba Laboratory, BoZo Research Center Inc., 1284 Kamado, Gotemba, Shizuoka 412-0039, Japan
| | - Yachiyo Fukunaga
- Tsukuba Research Institute, BoZo Research Center Inc., 8 Okubo, Tsukuba, Ibaraki 300-2611, Japan
| | - Osamu Hashiguchi
- Gotemba Laboratory, BoZo Research Center Inc., 1284 Kamado, Gotemba, Shizuoka 412-0039, Japan
| | - Shuzo Okazaki
- Gotemba Laboratory, BoZo Research Center Inc., 1284 Kamado, Gotemba, Shizuoka 412-0039, Japan
| | - Yuko Yamaguchi
- Gotemba Laboratory, BoZo Research Center Inc., 1284 Kamado, Gotemba, Shizuoka 412-0039, Japan
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19
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Gill JF, Delezie J, Santos G, McGuirk S, Schnyder S, Frank S, Rausch M, St‐Pierre J, Handschin C. Peroxisome proliferator-activated receptor γ coactivator 1α regulates mitochondrial calcium homeostasis, sarcoplasmic reticulum stress, and cell death to mitigate skeletal muscle aging. Aging Cell 2019; 18:e12993. [PMID: 31290266 PMCID: PMC6718523 DOI: 10.1111/acel.12993] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 04/26/2019] [Accepted: 05/27/2019] [Indexed: 11/28/2022] Open
Abstract
Age-related impairment of muscle function severely affects the health of an increasing elderly population. While causality and the underlying mechanisms remain poorly understood, exercise is an efficient intervention to blunt these aging effects. We thus investigated the role of the peroxisome proliferator-activated receptor γ coactivator 1α (PGC-1α), a potent regulator of mitochondrial function and exercise adaptation, in skeletal muscle during aging. We demonstrate that PGC-1α overexpression improves mitochondrial dynamics and calcium buffering in an estrogen-related receptor α-dependent manner. Moreover, we show that sarcoplasmic reticulum stress is attenuated by PGC-1α. As a result, PGC-1α prevents tubular aggregate formation and cell death pathway activation in old muscle. Similarly, the pro-apoptotic effects of ceramide and thapsigargin were blunted by PGC-1α in muscle cells. Accordingly, mice with muscle-specific gain-of-function and loss-of-function of PGC-1α exhibit a delayed and premature aging phenotype, respectively. Together, our data reveal a key protective effect of PGC-1α on muscle function and overall health span in aging.
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Affiliation(s)
- Jonathan F. Gill
- Biozentrum, Division of Pharmacology/Neurobiology University of Basel Basel Switzerland
| | - Julien Delezie
- Biozentrum, Division of Pharmacology/Neurobiology University of Basel Basel Switzerland
| | - Gesa Santos
- Biozentrum, Division of Pharmacology/Neurobiology University of Basel Basel Switzerland
| | - Shawn McGuirk
- Department of Biochemistry, Rosalind and Morris Goodman Cancer Centre McGill University Montreal Quebec Canada
| | - Svenia Schnyder
- Biozentrum, Division of Pharmacology/Neurobiology University of Basel Basel Switzerland
| | - Stephan Frank
- Division of Neuropathology, Institute of Pathology, University Hospital Basel University of Basel Basel Switzerland
| | - Martin Rausch
- Biotherapeutic and Analytical Technologies Novartis Institutes for BioMedical Research (NIBR) Basel Switzerland
| | - Julie St‐Pierre
- Department of Biochemistry, Rosalind and Morris Goodman Cancer Centre McGill University Montreal Quebec Canada
| | - Christoph Handschin
- Biozentrum, Division of Pharmacology/Neurobiology University of Basel Basel Switzerland
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20
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Morin G, Biancalana V, Echaniz-Laguna A, Noury JB, Lornage X, Moggio M, Ripolone M, Violano R, Marcorelles P, Maréchal D, Renaud F, Maurage CA, Tard C, Cuisset JM, Laporte J, Böhm J. Tubular aggregate myopathy and Stormorken syndrome: Mutation spectrum and genotype/phenotype correlation. Hum Mutat 2019; 41:17-37. [PMID: 31448844 DOI: 10.1002/humu.23899] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Revised: 07/29/2019] [Accepted: 08/21/2019] [Indexed: 11/06/2022]
Abstract
Calcium (Ca2+ ) acts as a ubiquitous second messenger, and normal cell and tissue physiology strictly depends on the precise regulation of Ca2+ entry, storage, and release. Store-operated Ca2+ entry (SOCE) is a major mechanism controlling extracellular Ca2+ entry, and mainly relies on the accurate interplay between the Ca2+ sensor STIM1 and the Ca2+ channel ORAI1. Mutations in STIM1 or ORAI1 result in abnormal Ca2+ homeostasis and are associated with severe human disorders. Recessive loss-of-function mutations impair SOCE and cause combined immunodeficiency, while dominant gain-of-function mutations induce excessive extracellular Ca2+ entry and cause tubular aggregate myopathy (TAM) and Stormorken syndrome (STRMK). TAM and STRMK are spectra of the same multisystemic disease characterized by muscle weakness, miosis, thrombocytopenia, hyposplenism, ichthyosis, dyslexia, and short stature. To date, 42 TAM/STRMK families have been described, and here we report five additional families for which we provide clinical, histological, ultrastructural, and genetic data. In this study, we list and review all new and previously reported STIM1 and ORAI1 cases, discuss the pathomechanisms of the mutations based on the known functions and the protein structure of STIM1 and ORAI1, draw a genotype/phenotype correlation, and delineate an efficient screening strategy for the molecular diagnosis of TAM/STRMK.
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Affiliation(s)
- Gilles Morin
- Clinical Genetics, Amiens University Hospital, Amiens, France.,University of Picardy Jules Verne, EA 4666, Amiens, France.,Department of translational medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
| | - Valérie Biancalana
- Department of translational medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France.,Inserm U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,Strasbourg University, Illkirch, France.,Laboratoire Diagnostic Génétique, CHRU, Strasbourg, France
| | - Andoni Echaniz-Laguna
- Department of Neurology, APHP, CHU de Bicêtre, Le Kremlin Bicêtre, France.,French National Reference Center for Rare Neuropathies (NNERF), Le Kremlin Bicêtre, France.,Inserm U1195 & Paris-Sud University, Le Kremlin Bicêtre, France
| | | | - Xavière Lornage
- Department of translational medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France.,Inserm U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,Strasbourg University, Illkirch, France
| | - Maurizio Moggio
- Neuromuscular and Rare Diseases Unit, Department of Neuroscience, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Michela Ripolone
- Neuromuscular and Rare Diseases Unit, Department of Neuroscience, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | - Raffaella Violano
- Neuromuscular and Rare Diseases Unit, Department of Neuroscience, Fondazione IRCCS Ca' Granda, Ospedale Maggiore Policlinico, Milan, Italy
| | | | - Denis Maréchal
- Department of Neurology, CHRU Cavale Blanche, Brest, France
| | - Florence Renaud
- Department of Pathology, Lille University Hospital, Lille, France
| | | | - Céline Tard
- CHU Lille, Inserm U1171, Service de neurologie, Centre de Référence des Maladies Neuromusculaires Nord Est Ile-de-France, Lille University, Lille, France
| | | | - Jocelyn Laporte
- Department of translational medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France.,Inserm U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,Strasbourg University, Illkirch, France
| | - Johann Böhm
- Department of translational medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France.,Inserm U1258, Illkirch, France.,CNRS UMR7104, Illkirch, France.,Strasbourg University, Illkirch, France
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21
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Li A, Kang X, Edelman F, Waclawik AJ. Stormorken Syndrome: A Rare Cause of Myopathy With Tubular Aggregates and Dystrophic Features. J Child Neurol 2019; 34:321-324. [PMID: 30761937 DOI: 10.1177/0883073819829389] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Stormorken syndrome is a rare genetic disorder (MIM 185070) first reported in 1983 with thrombocytopenia, muscle weakness, asplenia, and miosis caused by a mutation of the stromal interaction molecule 1 ( STIM1) gene.1 The muscle weakness is caused by a myopathy with tubular aggregate formation. We report a family in which both child and mother presented with proximal muscle weakness and thrombocytopenia. Histologic, histochemical, and electron microscopy studies were performed on the muscle specimen. It documented accumulation of tubular aggregates and chronic myopathic changes with dystrophic features. Genetic testing revealed that both mother and son carried a missense mutation of c.326A>G in exon 3 of the STIM1 gene, which is novel for Stormorken syndrome. We suggest that patients with unexplained chronic idiopathic thrombocytopenia and proximal weakness have genetic testing for Stormorken syndrome.
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Affiliation(s)
- Ang Li
- 1 Department of Neurology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Xuan Kang
- 1 Department of Neurology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Frederick Edelman
- 1 Department of Neurology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
| | - Andrew J Waclawik
- 1 Department of Neurology, University of Wisconsin School of Medicine and Public Health, Madison, WI, USA
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22
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Carraro U. Collection of the Abstracts of the 2019Sp PMD: Translational Myology and Mobility Medicine. Eur J Transl Myol 2019; 29:8155. [PMID: 31019666 PMCID: PMC6460219 DOI: 10.4081/ejtm.2019.8155] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The Interdepartmental Research Centre of Myology (CIR-Myo), Department of Biomedical Sciences, University of Padova, Italy and the A&C M-C Foundation for Translational Myology, Padova, Italy organized with the scientific support of Helmut Kern, Jonathan C. Jarvis, Viviana Moresi, Marco Narici, Feliciano Protasi, Marco Sandri and Ugo Carraro, the 2019SpringPaduaMuscleDays: Translational Myology and Mobility Medicine, an International Conference held March 28-30, 2019 in Euganei Hills and Padova (Italy). Presentations and discussions of the Three Physiology Lectures and of the seven Sessions (I: Spinal Cord Neuromodulation and h-bFES in SC; II: Muscle epigenetics in aging and myopathies; III: Experimental approaches in animal models; IV: Face and Voice Rejuvenation; V: Muscle Imaging; VI: Official Meeting of the EU Center of Active Aging; VII: Early Rehabilitation after knee and hip replacement) were at very high levels. This was true in the past and will be true in future events thanks to researchers and clinicians who were and are eager to attend the PaduaMuscleDays.
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Affiliation(s)
- Ugo Carraro
- Interdepartmental Research Centre of Myology (CIR-Myo), Department of Biomedical Sciences, University of Padova, Italy
- A&C M-C Foundation for Translational Myology, Padova, Italy
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23
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Tinklenberg JA, Siebers EM, Beatka MJ, Meng H, Yang L, Zhang Z, Ross JA, Ochala J, Morris C, Owens JM, Laing NG, Nowak KJ, Lawlor MW. Myostatin inhibition using mRK35 produces skeletal muscle growth and tubular aggregate formation in wild type and TgACTA1D286G nemaline myopathy mice. Hum Mol Genet 2019; 27:638-648. [PMID: 29293963 DOI: 10.1093/hmg/ddx431] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 12/15/2017] [Indexed: 12/27/2022] Open
Abstract
Nemaline myopathy (NM) is a heterogeneous congenital skeletal muscle disease with cytoplasmic rod-like structures (nemaline bodies) in muscle tissue. While weakness in NM is related to contractile abnormalities, myofiber smallness is an additional abnormality in NM that may be treatable. We evaluated the effects of mRK35 (a myostatin inhibitor developed by Pfizer) treatment in the TgACTA1D286G mouse model of NM. mRK35 induced skeletal muscle growth that led to significant increases in animal bodyweight, forelimb grip strength and muscle fiber force, although it should be noted that animal weight and forelimb grip strength in untreated TgACTA1D286G mice was not different from controls. Treatment was also associated with an increase in the number of tubular aggregates found in skeletal muscle. These findings suggest that myostatin inhibition may be useful in promoting muscle growth and strength in Acta1-mutant muscle, while also further establishing the relationship between low levels of myostatin and tubular aggregate formation.
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Affiliation(s)
- Jennifer A Tinklenberg
- Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee 53226, WI, USA
| | - Emily M Siebers
- Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee 53226, WI, USA
| | - Margaret J Beatka
- Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee 53226, WI, USA
| | - Hui Meng
- Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee 53226, WI, USA
| | - Lin Yang
- Department of Biomedical Engineering, University of Florida, Gainesville 32607, FL, USA
| | - Zizhao Zhang
- Department of Biomedical Engineering, University of Florida, Gainesville 32607, FL, USA
| | - Jacob A Ross
- School of Basic and Medical Biosciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | - Julien Ochala
- School of Basic and Medical Biosciences, Faculty of Life Sciences and Medicine, King's College London, London, UK
| | | | | | - Nigel G Laing
- Centre for Medical Research, The University of Western Australia, Perth, WA, Australia.,Harry Perkins Institute of Medical Research, Nedlands, WA, Australia
| | - Kristen J Nowak
- Harry Perkins Institute of Medical Research, Nedlands, WA, Australia.,Faculty of Health and Medical Sciences, School of Biomedical Sciences, The University of Western Australia, Perth, WA, Australia
| | - Michael W Lawlor
- Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee 53226, WI, USA
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24
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Silva-Rojas R, Treves S, Jacobs H, Kessler P, Messaddeq N, Laporte J, Böhm J. STIM1 over-activation generates a multi-systemic phenotype affecting the skeletal muscle, spleen, eye, skin, bones and immune system in mice. Hum Mol Genet 2018; 28:1579-1593. [DOI: 10.1093/hmg/ddy446] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2018] [Revised: 12/18/2018] [Accepted: 12/19/2018] [Indexed: 11/13/2022] Open
Affiliation(s)
- Roberto Silva-Rojas
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Inserm, CNRS, Université de Strasbourg, Illkirch, France
| | - Susan Treves
- Departments of Biomedicine and Anaesthesia, Basel University Hospital, Basel University, Basel, Switzerland
- Department of Life Sciences, General Pathology section, University of Ferrara, Ferrara, Italy
| | - Hugues Jacobs
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Inserm, CNRS, Université de Strasbourg, Illkirch, France
- Institut Clinique de la Souris (ICS), Illkirch, France
| | - Pascal Kessler
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Inserm, CNRS, Université de Strasbourg, Illkirch, France
| | - Nadia Messaddeq
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Inserm, CNRS, Université de Strasbourg, Illkirch, France
| | - Jocelyn Laporte
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Inserm, CNRS, Université de Strasbourg, Illkirch, France
| | - Johann Böhm
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Inserm, CNRS, Université de Strasbourg, Illkirch, France
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25
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Böhm J, Laporte J. [Tubular aggregate myopathy and Stormorken syndrome]. Med Sci (Paris) 2018; 34 Hors série n°2:26-31. [PMID: 30418142 DOI: 10.1051/medsci/201834s208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Calcium (Ca2+) is an essential regulator for a large number of cellular functions in various tissues and organs, and small disturbances of Ca2+ homeostasis can severely compromise normal physiology. Intracellular Ca2+ balance is mainly controlled by the reticular Ca2+ sensor STIM1 and the plasma membrane Ca2+ channel ORAI1 through a mechanism known as store-operated Ca2+ entry (SOCE). Gain-of-function mutations in STIM1 or ORAI1 cause excessive extracellular Ca2+ influx, resulting in tubular aggregate myopathy (TAM) and Stormorken syndrome (STRMK). Both disorders are spectra of the same disease and involve muscle weakness, miosis, thrombocytopenia, hyposplenism, ichthyosis, dyslexia, and short stature. Here we summarize the clinical and histological characteristics of both disorders, provide an overview on the genetic causes, and recapitulate the current knowledge on the pathomechanisms leading to the multi-systemic phenotype of tubular aggregate myopathy and Stormorken syndrome.
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Affiliation(s)
- Johann Böhm
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France - Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France - Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France - Université de Strasbourg, Illkirch, France
| | - Jocelyn Laporte
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France - Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France - Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France - Université de Strasbourg, Illkirch, France
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26
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Böhm J, Laporte J. Gain-of-function mutations in STIM1 and ORAI1 causing tubular aggregate myopathy and Stormorken syndrome. Cell Calcium 2018; 76:1-9. [PMID: 30243034 DOI: 10.1016/j.ceca.2018.07.008] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 07/26/2018] [Accepted: 07/26/2018] [Indexed: 11/16/2022]
Abstract
Calcium (Ca2+) is a key regulator for a large number of cellular functions in all kinds of cells, and small disturbances of Ca2+ homeostasis can severely compromise normal physiology in various tissues and organs. A major mechanism controlling Ca2+ homeostasis is store-operated Ca2+ entry (SOCE), which relies on the concerted action of the reticular Ca2+ sensor STIM1 and the plasma membrane Ca2+ channel ORAI1. Gain-of-function mutations in the respective genes induce excessive Ca2+ entry, and cause tubular aggregate myopathy (TAM) and Stormorken syndrome. Both disorders are part of a clinical continuum and involve muscle weakness and additional variably pronounced features including miosis, thrombocytopenia, hyposplenism, ichthyosis, dyslexia, and short stature. Mutations in the reticular Ca2+ buffer calsequestrin (CASQ1) have moreover been associated with the mild end of the TAM/Stormorken syndrome spectrum. Here we review the clinical and histological characteristics of both disorders, provide an overview on the genetic causes, and thereby focus on the pathomechanisms leading to muscle dysfunction and the multi-systemic phenotype of tubular aggregate myopathy and Stormorken syndrome.
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Affiliation(s)
- Johann Böhm
- Departement of Translational Medicine and Neurogenetics, IGBMC (Institut de Génétique et de Biologie Moléculaire et Cellulaire), Inserm U1258, CNRS UMR7104, Université de Strasbourg, Illkirch, France.
| | - Jocelyn Laporte
- Departement of Translational Medicine and Neurogenetics, IGBMC (Institut de Génétique et de Biologie Moléculaire et Cellulaire), Inserm U1258, CNRS UMR7104, Université de Strasbourg, Illkirch, France
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27
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Tawara N, Yamashita S, Kawakami K, Kurashige T, Zhang Z, Tasaki M, Yamamoto Y, Nishikami T, Doki T, Zhang X, Matsuo Y, Kimura E, Tawara A, Maeda Y, Hauschka SD, Maruyama H, Ando Y. Muscle-dominant wild-type TDP-43 expression induces myopathological changes featuring tubular aggregates and TDP-43-positive inclusions. Exp Neurol 2018; 309:169-180. [PMID: 30130494 DOI: 10.1016/j.expneurol.2018.08.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2018] [Revised: 07/30/2018] [Accepted: 08/15/2018] [Indexed: 11/15/2022]
Abstract
Muscle histology of sporadic inclusion body myositis (sIBM) demonstrates inflammatory findings and degenerative features including accumulation of TAR DNA-binding protein of 43 kDa (TDP-43). However, whether sarcoplasmic accumulation of TDP-43 is a primary trigger of muscle degeneration or a secondary event resulting from muscle degeneration in the pathophysiology of sIBM remained unclear. Our study aimed to discover whether muscle-dominant expression of TDP-43 is a primary cause of muscle degeneration. We generated several lines of wild-type TDP-43 transgenic mice driven by a creatine kinase 8 promoter, and analyzed the phenotypes via biochemical, histological, and proteomic techniques. The mice showed increased serum levels of myogenic enzymes. Muscle histology demonstrated myopathic changes including fiber size variation, abundant tubular aggregates, and TDP-43 aggregation with upregulation of endoplasmic reticulum (ER) stress. Proteomic analysis with aggregated materials in degenerative myofibers identified increased sarcoplasmic reticulum (SR)/ER-resident proteins that regulated calcium homeostasis, as well as cytosolic 5'-nucleotidase 1A. Muscle-dominant wild-type TDP-43 expression indeed caused myotoxicity featuring tubular aggregates and TDP-43-positive inclusions. Our observation suggested that TDP-43 aggregates might not be sufficient to trigger the pathogenesis of sIBM although myofiber sarcoplasmic aggregation of TDP-43 led to myofiber degeneration via ER stress and possibly calcium dysregulation, independently of inflammatory process.
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Affiliation(s)
- Nozomu Tawara
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Satoshi Yamashita
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan.
| | - Kensuke Kawakami
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Takashi Kurashige
- Department of Neurology, National Hospital Organization Kure Medical Centre, 3-1 Aoyama-cho, Kure, Hiroshima 737-0023, Japan; Department of Clinical Neuroscience and Therapeutics, Hiroshima University Graduate School of Biomedical and Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan
| | - Ziwei Zhang
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Masayoshi Tasaki
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Yasuhiro Yamamoto
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Tomo Nishikami
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Tsukasa Doki
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Xiao Zhang
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Yoshimasa Matsuo
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - En Kimura
- Translational Medical Center, National Center of Neurology and Psychiatry, 4-1-1 Ogawahigashi, Kodaira 187-8551, Japan
| | - Akie Tawara
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
| | - Yasushi Maeda
- Department of Clinical Research, and Department of Neurology, National Hospital Organization Kumamoto Saishunso National Hospital, 2659 Suya, Koshi, Kumamoto 861-1196, Japan
| | - Stephen D Hauschka
- Department of Biochemistry, University of Washington, 1705 NE Pacific St., Seattle, WA 98195-7350, USA
| | - Hirofumi Maruyama
- Department of Clinical Neuroscience and Therapeutics, Hiroshima University Graduate School of Biomedical and Health Sciences, 1-2-3 Kasumi, Minami-ku, Hiroshima 734-8551, Japan
| | - Yukio Ando
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto 860-8556, Japan
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Toniolo L, Fusco P, Formoso L, Mazzi A, Canato M, Reggiani C, Giacomello E. Resveratrol treatment reduces the appearance of tubular aggregates and improves the resistance to fatigue in aging mice skeletal muscles. Exp Gerontol 2018; 111:170-179. [PMID: 30036632 DOI: 10.1016/j.exger.2018.07.012] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Revised: 07/06/2018] [Accepted: 07/18/2018] [Indexed: 01/07/2023]
Abstract
Resveratrol (RES) is a polyphenolic compound found in grapes, peanuts, and in some berries. RES has been reported to exhibit antioxidant, anti-inflammatory, anti-proliferative properties, and to target mitochondrial-related pathways in mammalian cells and animal models. Therefore, RES is currently advised as supplement in the diet of elderly individuals. Although it is hypothesized that some of RES beneficial actions likely arise from its action on the skeletal muscle, the investigation of RES effects on this tissue remains still elusive. This study reports the effects of a 0,04% RES-supplemented diet for six months, on the skeletal muscle properties of C57/BL6 aging mice. The analysis of the morphology, protein expression, and functional-mechanical properties of selected skeletal muscles in treated compared to control mice, revealed that treated animals presented less tubular aggregates and a better resistance to fatigue in an ex-vivo contraction test, suggesting RES as a good candidate to reduce age-related alterations in muscle.
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Affiliation(s)
- Luana Toniolo
- Laboratory of Muscle Biophysics, Department of Biomedical Sciences, University of Padova, Padova, Italy; Interuniversity Institute of Myology, Italy
| | - Pina Fusco
- Department of Molecular and Developmental Medicine, University of Siena, Italy
| | - Luca Formoso
- Department of Molecular and Developmental Medicine, University of Siena, Italy
| | - Alessandra Mazzi
- Department of Molecular and Developmental Medicine, University of Siena, Italy
| | - Marta Canato
- Laboratory of Muscle Biophysics, Department of Biomedical Sciences, University of Padova, Padova, Italy
| | - Carlo Reggiani
- Laboratory of Muscle Biophysics, Department of Biomedical Sciences, University of Padova, Padova, Italy; Interuniversity Institute of Myology, Italy
| | - Emiliana Giacomello
- Department of Molecular and Developmental Medicine, University of Siena, Italy; Interuniversity Institute of Myology, Italy.
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29
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Xu H, Ren X, Lamb GD, Murphy RM. Physiological and biochemical characteristics of skeletal muscles in sedentary and active rats. J Muscle Res Cell Motil 2018; 39:1-16. [PMID: 29948664 DOI: 10.1007/s10974-018-9493-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2018] [Accepted: 05/24/2018] [Indexed: 12/13/2022]
Abstract
Laboratory rats are sedentary if housed in conditions where activity is limited. Changes in muscle characteristics with chronic inactivity were investigated by comparing sedentary rats with rats undertaking voluntary wheel running for either 6 or 12 weeks. EDL (type II fibers) and soleus (SOL) muscles (predominantly type I fibers) were examined. When measured within 1-2 h post-running, calcium sensitivity of the contractile apparatus was increased, but only in type II fibers. This increase disappeared when fibers were treated with DTT, indicative of oxidative regulation of the contractile apparatus, and was absent in fibers from rats that had ceased running 24 h prior to experiments. Specific force production was ~ 10 to 25% lower in muscle fibers of sedentary compared to active rats, and excitability of skinned fibers was decreased. Muscle glycogen content was ~ 30% lower and glycogen synthase content ~ 50% higher in SOL of sedentary rats, and in EDL glycogenin was 30% lower. Na+, K+-ATPase α1 subunit density was ~ 20% lower in both EDL and SOL in sedentary rats, and GAPDH content in SOL ~ 35% higher. There were no changes in content of the calcium handling proteins calsequestrin and SERCA, but the content of CSQ-like protein was increased in active rats (by ~ 20% in EDL and 60% in SOL). These findings show that voluntary exercise elicits an acute oxidation-induced increase in Ca2+ sensitivity in type II fibers, and also that there are substantial changes in skeletal muscle characteristics and biochemical processes in sedentary rats.
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Affiliation(s)
- Hongyang Xu
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Xiaoyu Ren
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Graham D Lamb
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Robyn M Murphy
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia.
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30
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Sayed RKA, Fernández-Ortiz M, Diaz-Casado ME, Rusanova I, Rahim I, Escames G, López LC, Mokhtar DM, Acuña-Castroviejo D. The Protective Effect of Melatonin Against Age-Associated, Sarcopenia-Dependent Tubular Aggregate Formation, Lactate Depletion, and Mitochondrial Changes. J Gerontol A Biol Sci Med Sci 2018; 73:1330-1338. [DOI: 10.1093/gerona/gly059] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2017] [Accepted: 03/18/2018] [Indexed: 12/16/2022] Open
Affiliation(s)
- Ramy K A Sayed
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain
- Department of Anatomy and Embryology, Faculty of Veterinary Medicine, Sohag University, Egypt
| | - Marisol Fernández-Ortiz
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain
- Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, Spain
| | - María E Diaz-Casado
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain
- Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, Spain
| | - Iryna Rusanova
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain
- Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, Spain
- CIBER de Fragilidad y Envejecimiento, Ibs. Granada, Unidad de Gestión Clínica de Laboratorios Clínicos, Complejo Hospitalario de Granada, Spain
| | - Ibtissem Rahim
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain
- Laboratory of Cellular and Molecular Biology, Faculty of Science Biologiques, University of Science and Technology Houari Boumedienne (USTHB), Algeria
| | - Germaine Escames
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain
- Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, Spain
- CIBER de Fragilidad y Envejecimiento, Ibs. Granada, Unidad de Gestión Clínica de Laboratorios Clínicos, Complejo Hospitalario de Granada, Spain
| | - Luis C López
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain
- Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, Spain
- CIBER de Fragilidad y Envejecimiento, Ibs. Granada, Unidad de Gestión Clínica de Laboratorios Clínicos, Complejo Hospitalario de Granada, Spain
| | - Doaa M Mokhtar
- Department of Anatomy and Histology, Faculty of Veterinary Medicine, Assiut University, Egypt
| | - Darío Acuña-Castroviejo
- Instituto de Biotecnología, Centro de Investigación Biomédica, Parque Tecnológico de Ciencias de la Salud, Universidad de Granada, Spain
- Departamento de Fisiología, Facultad de Medicina, Universidad de Granada, Spain
- CIBER de Fragilidad y Envejecimiento, Ibs. Granada, Unidad de Gestión Clínica de Laboratorios Clínicos, Complejo Hospitalario de Granada, Spain
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31
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Huang YL, Shen ZQ, Wu CY, Teng YC, Liao CC, Kao CH, Chen LK, Lin CH, Tsai TF. Comparative proteomic profiling reveals a role for Cisd2 in skeletal muscle aging. Aging Cell 2018; 17. [PMID: 29168286 PMCID: PMC5770874 DOI: 10.1111/acel.12705] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/21/2017] [Indexed: 12/02/2022] Open
Abstract
Skeletal muscle has emerged as one of the most important tissues involved in regulating systemic metabolism. The gastrocnemius is a powerful skeletal muscle composed of predominantly glycolytic fast‐twitch fibers that are preferentially lost among old age. This decrease in gastrocnemius muscle mass is remarkable during aging; however, the underlying molecular mechanism is not fully understood. Strikingly, there is a ~70% decrease in Cisd2 protein, a key regulator of lifespan in mice and the disease gene for Wolfram syndrome 2 in humans, within the gastrocnemius after middle age among mice. A proteomics approach was used to investigate the gastrocnemius of naturally aged mice, and this was compared to the autonomous effect of Cisd2 on gastrocnemius aging using muscle‐specific Cisd2 knockout (mKO) mice as a premature aging model. Intriguingly, dysregulation of calcium signaling and activation of UPR/ER stress stand out as the top two pathways. Additionally, the activity of Serca1 was significantly impaired and this impairment is mainly attributable to irreversibly oxidative modifications of Serca. Our results reveal that the overall characteristics of the gastrocnemius are very similar when naturally aged mice and the Cisd2 mKO mice are compared in terms of pathological alterations, ultrastructural abnormalities, and proteomics profiling. This suggests that Cisd2 mKO mouse is a unique model for understanding the aging mechanism of skeletal muscle. Furthermore, this work substantiates the hypothesis that Cisd2 is crucial to the gastrocnemius muscle and suggests that Cisd2 is a potential therapeutic target for muscle aging.
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Affiliation(s)
- Yi-Long Huang
- Department of Life Sciences and Institute of Genome Sciences; National Yang-Ming University; Taipei Taiwan
| | - Zhao-Qing Shen
- Department of Life Sciences and Institute of Genome Sciences; National Yang-Ming University; Taipei Taiwan
| | - Chia-Yu Wu
- Department of Life Sciences and Institute of Genome Sciences; National Yang-Ming University; Taipei Taiwan
| | - Yuan-Chi Teng
- Program in Molecular Medicine; School of Life Sciences; National Yang-Ming University and Academia Sinica; Taipei Taiwan
| | - Chen-Chung Liao
- Proteomics Research Center; National Yang Ming University; Taipei Taiwan
| | - Cheng-Heng Kao
- Center of General Education; Chang Gung University; Taoyuan Taiwan
| | - Liang-Kung Chen
- Center for Geriatrics and Gerontology; Taipei Veterans General Hospital; Taipei Taiwan
- Aging and Health Research Center; National Yang-Ming University; Taipei Taiwan
| | - Chao-Hsiung Lin
- Department of Life Sciences and Institute of Genome Sciences; National Yang-Ming University; Taipei Taiwan
- Program in Molecular Medicine; School of Life Sciences; National Yang-Ming University and Academia Sinica; Taipei Taiwan
- Proteomics Research Center; National Yang Ming University; Taipei Taiwan
- Aging and Health Research Center; National Yang-Ming University; Taipei Taiwan
| | - Ting-Fen Tsai
- Department of Life Sciences and Institute of Genome Sciences; National Yang-Ming University; Taipei Taiwan
- Program in Molecular Medicine; School of Life Sciences; National Yang-Ming University and Academia Sinica; Taipei Taiwan
- Aging and Health Research Center; National Yang-Ming University; Taipei Taiwan
- Genome Research Center; National Yang-Ming University; Taipei Taiwan
- Institute of Molecular and Genomic Medicine; National Health Research Institutes; Zhunan Taiwan
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32
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Xu H, Lamb GD, Murphy RM. Changes in contractile and metabolic parameters of skeletal muscle as rats age from 3 to 12 months. J Muscle Res Cell Motil 2017; 38:405-420. [PMID: 29185184 DOI: 10.1007/s10974-017-9484-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 10/20/2017] [Indexed: 12/01/2022]
Abstract
Laboratory rats are considered mature at 3 months despite that musculoskeletal growth is still occurring. Changes in muscle physiological and biochemical characteristics during development from 3 months, however, are not well understood. Whole muscles and single skinned fibres from fast-twitch extensor digitorum longus (EDL) and predominantly slow-twitch soleus (SOL) muscles were examined from male Sprague-Dawley rats (3, 6, 9, 12 months). Ca2+ sensitivity of contractile apparatus decreased with age in both fast- (~ 0.04 pCa units) and slow-twitch (~ 0.07 pCa units) muscle fibres, and specific force increased (by ~ 50% and ~ 25%, respectively). Myosin heavy chain composition of EDL and SOL muscles altered to a small extent with age (decrease in MHCIIa proportion after 3 months). Glycogen content increased with age (~ 80% in EDL and 25% in SOL) and GLUT4 protein density decreased (~ 35 and 20%, respectively), whereas the glycogen-related enzymes were little changed. GAPDH protein content was relatively constant in both muscle types, but COXIV protein decreased ~ 40% in SOL muscle. Calsequestrin (CSQ) and SERCA densities remained relatively constant with age, whereas there was a progressive ~ 2-3 fold increase in CSQ-like proteins, though their role and importance remain unclear. There was also ~ 40% decrease in the density of the Na+, K+-ATPase (NKA) α1 subunit in EDL and the α2 subunit in SOL. These findings emphasise there are substantial changes in skeletal muscle function and the density of key proteins during early to mid-adulthood in rats, which need to be considered in the design and interpretation of experiments.
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Affiliation(s)
- Hongyang Xu
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Graham D Lamb
- Department of Physiology, Anatomy and Microbiology, La Trobe University, Melbourne, VIC, 3086, Australia
| | - Robyn M Murphy
- Department of Biochemistry and Genetics, La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC, 3086, Australia.
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33
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Mutations in GFPT1-related congenital myasthenic syndromes are associated with synaptic morphological defects and underlie a tubular aggregate myopathy with synaptopathy. J Neurol 2017; 264:1791-1803. [DOI: 10.1007/s00415-017-8569-x] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Revised: 07/03/2017] [Accepted: 07/11/2017] [Indexed: 12/22/2022]
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Abstract
Progeroid mouse models display phenotypes in multiple organ systems that suggest premature aging and resemble features of natural aging of both mice and humans. The prospect of a significant increase in the global elderly population within the next decades has led to the emergence of "geroscience," which aims at elucidating the molecular mechanisms involved in aging. Progeroid mouse models are frequently used in geroscience as they provide insight into the molecular mechanisms that are involved in the highly complex process of natural aging. This review provides an overview of the most commonly reported nonneoplastic macroscopic and microscopic pathologic findings in progeroid mouse models (eg, osteoporosis, osteoarthritis, degenerative joint disease, intervertebral disc degeneration, kyphosis, sarcopenia, cutaneous atrophy, wound healing, hair loss, alopecia, lymphoid atrophy, cataract, corneal endothelial dystrophy, retinal degenerative diseases, and vascular remodeling). Furthermore, several shortcomings in pathologic analysis and descriptions of these models are discussed. Progeroid mouse models are valuable models for aging, but thorough knowledge of both the mouse strain background and the progeria-related phenotype is required to guide interpretation and translation of the pathology data.
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Affiliation(s)
- L Harkema
- Dutch Molecular Pathology Center, Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - S A Youssef
- Dutch Molecular Pathology Center, Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - A de Bruin
- Dutch Molecular Pathology Center, Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands Department of Pediatrics, Division of Molecular Genetics, University Medical Center Groningen, Groningen, The Netherlands
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35
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Xu JW, Liu FC, Li W, Zhao YY, Zhao DD, Luo YB, Lu JQ, Yan CZ. Cylindrical Spirals in Skeletal Muscles Originate From the Longitudinal Sarcoplasmic Reticulum. J Neuropathol Exp Neurol 2016; 75:148-55. [DOI: 10.1093/jnen/nlv013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
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36
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Chevessier F, Schuld J, Orfanos Z, Plank AC, Wolf L, Maerkens A, Unger A, Schlötzer-Schrehardt U, Kley RA, Von Hörsten S, Marcus K, Linke WA, Vorgerd M, van der Ven PFM, Fürst DO, Schröder R. Myofibrillar instability exacerbated by acute exercise in filaminopathy. Hum Mol Genet 2015; 24:7207-20. [PMID: 26472074 DOI: 10.1093/hmg/ddv421] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2015] [Accepted: 10/02/2015] [Indexed: 12/12/2022] Open
Abstract
Filamin C (FLNC) mutations in humans cause myofibrillar myopathy (MFM) and cardiomyopathy, characterized by protein aggregation and myofibrillar degeneration. We generated the first patient-mimicking knock-in mouse harbouring the most common disease-causing filamin C mutation (p.W2710X). These heterozygous mice developed muscle weakness and myofibrillar instability, with formation of filamin C- and Xin-positive lesions streaming between Z-discs. These lesions, which are distinct from the classical MFM protein aggregates by their morphology and filamentous appearance, were greatly increased in number upon acute physical exercise in the mice. This pathology suggests that mutant filamin influences the mechanical stability of myofibrillar Z-discs, explaining the muscle weakness in mice and humans. Re-evaluation of biopsies from MFM-filaminopathy patients with different FLNC mutations revealed a similar, previously unreported lesion pathology, in addition to the classical protein aggregates, and suggested that structures previously interpreted as aggregates may be in part sarcomeric lesions. We postulate that these lesions define preclinical disease stages, preceding the formation of protein aggregates.
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Affiliation(s)
| | - Julia Schuld
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, Bonn, Germany
| | - Zacharias Orfanos
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, Bonn, Germany
| | - Anne-C Plank
- Department for Experimental Therapy, Preclinical Experimental Animal Center and
| | | | - Alexandra Maerkens
- Department of Neurology, Neuromuscular Center Ruhrgebiet, University Hospital Bergmannsheil, Department of Functional Proteomics, Medizinisches Proteom-Center and
| | - Andreas Unger
- Department of Cardiovascular Physiology, Ruhr-University Bochum, Bochum, Germany
| | | | - Rudolf A Kley
- Department of Neurology, Neuromuscular Center Ruhrgebiet, University Hospital Bergmannsheil
| | - Stephan Von Hörsten
- Department for Experimental Therapy, Preclinical Experimental Animal Center and
| | - Katrin Marcus
- Department of Functional Proteomics, Medizinisches Proteom-Center and
| | - Wolfgang A Linke
- Department of Cardiovascular Physiology, Ruhr-University Bochum, Bochum, Germany
| | - Matthias Vorgerd
- Department of Neurology, Neuromuscular Center Ruhrgebiet, University Hospital Bergmannsheil
| | - Peter F M van der Ven
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, Bonn, Germany
| | - Dieter O Fürst
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, Bonn, Germany,
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37
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Lamboley CR, Wyckelsma VL, Dutka TL, McKenna MJ, Murphy RM, Lamb GD. Contractile properties and sarcoplasmic reticulum calcium content in type I and type II skeletal muscle fibres in active aged humans. J Physiol 2015; 593:2499-514. [PMID: 25809942 DOI: 10.1113/jp270179] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Accepted: 03/23/2015] [Indexed: 01/25/2023] Open
Abstract
KEY POINTS Muscle weakness in old age is due in large part to an overall loss of skeletal muscle tissue, but it remains uncertain how much also stems from alterations in the properties of the individual muscle fibres. This study examined the contractile properties and amount of stored intracellular calcium in single muscle fibres of Old (70 ± 4 years) and Young (22 ± 3 years) adults. The maximum level of force production (per unit cross-sectional area) in fast twitch fibres in Old subjects was lower than in Young subjects, and the fibres were also less sensitive to activation by calcium. The amount of calcium stored inside muscle fibres and available to trigger contraction was also lower in both fast- and slow-twitch muscle fibres in the Old subjects. These findings indicate that muscle weakness in old age stems in part from an impaired capacity for force production in the individual muscle fibres. ABSTRACT This study examined the contractile properties and sarcoplasmic reticulum (SR) Ca(2+) content in mechanically skinned vastus lateralis muscle fibres of Old (70 ± 4 years) and Young (22 ± 3 years) humans to investigate whether changes in muscle fibre properties contribute to muscle weakness in old age. In type II fibres of Old subjects, specific force was reduced by ∼17% and Ca(2+) sensitivity was also reduced (pCa50 decreased ∼0.05 pCa units) relative to that in Young. S-Glutathionylation of fast troponin I (TnIf ) markedly increased Ca(2+) sensitivity in type II fibres, but the increase was significantly smaller in Old versus Young (+0.136 and +0.164 pCa unit increases, respectively). Endogenous and maximal SR Ca(2+) content were significantly smaller in both type I and type II fibres in Old subjects. In fibres of Young, the SR could be nearly fully depleted of Ca(2+) by a combined caffeine and low Mg(2+) stimulus, whereas in fibres of Old the amount of non-releasable Ca(2+) was significantly increased (by > 12% of endogenous Ca(2+) content). Western blotting showed an increased proportion of type I fibres in Old subjects, and increased amounts of calsequestrin-2 and calsequestrin-like protein. The findings suggest that muscle weakness in old age is probably attributable in part to (i) an increased proportion of type I fibres, (ii) a reduction in both maximum specific force and Ca(2+) sensitivity in type II fibres, and also a decreased ability of S-glutathionylation of TnIf to counter the fatiguing effects of metabolites on Ca(2+) sensitivity, and (iii) a reduction in the amount of releasable SR Ca(2+) in both fibre types.
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Affiliation(s)
- C R Lamboley
- Institute of Sport, Exercise and Active Living (ISEAL), Victoria University, PO Box 14428, Melbourne, Victoria, 8001, Australia
| | - V L Wyckelsma
- Institute of Sport, Exercise and Active Living (ISEAL), Victoria University, PO Box 14428, Melbourne, Victoria, 8001, Australia.,La Trobe Rural Health School, La Trobe University, Melbourne, Victoria, 3086, Australia
| | - T L Dutka
- School of Life Sciences, La Trobe University, Melbourne, Victoria, 3086, Australia
| | - M J McKenna
- Institute of Sport, Exercise and Active Living (ISEAL), Victoria University, PO Box 14428, Melbourne, Victoria, 8001, Australia
| | - R M Murphy
- School of Molecular Sciences, La Trobe University, Melbourne, Victoria, 3086, Australia
| | - G D Lamb
- School of Life Sciences, La Trobe University, Melbourne, Victoria, 3086, Australia
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38
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Soffe Z, Radley-Crabb HG, McMahon C, Grounds MD, Shavlakadze T. Effects of loaded voluntary wheel exercise on performance and muscle hypertrophy in young and old male C57Bl/6J mice. Scand J Med Sci Sports 2015; 26:172-88. [PMID: 25653015 DOI: 10.1111/sms.12416] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 12/23/2014] [Indexed: 01/05/2023]
Abstract
This study compared the capacity of young and old male C57Bl/6J mice to exercise with increasing resistance over 10 weeks, and its impact on muscle mass. Young mice (aged 15-25 weeks) were subjected to low (LR) and high (HR) resistance exercise, whereas only LR was used for old mice (107-117 weeks). Weekly patterns of voluntary wheel activity, food consumption and body weights were measured. Running patterns changed over time and with age, with two peaks of activity detected for young, but only one for old mice: speed and distance run was also less for old mice. The mass for six limb muscles was measured at the end of the experiment. The most pronounced increase in mass in response to exercise was for the soleus in young and old mice, and also quadriceps and gastrocnemius in young mice. Soleus and quadriceps muscles were analyzed histologically for myofiber number and size. A striking feature was the many small myofibers in response to exercise in young (but not old) soleus, whereas these were not present after exercise in young or old quadriceps. Overall, there was a striking difference in response to exercise between muscles and this was influenced by age.
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Affiliation(s)
- Z Soffe
- School of Anatomy, Physiology and Human Biology, the University of Western Australia, Nedlands, Western Australia, Australia
| | - H G Radley-Crabb
- School of Anatomy, Physiology and Human Biology, the University of Western Australia, Nedlands, Western Australia, Australia.,School of Biomedical Sciences, CHIRI Biosciences Research Precinct, Curtin University, Bentley, Western Australia, Australia
| | - C McMahon
- Developmental Biology Group, Agresearch Ltd, Hamilton, New Zealand
| | - M D Grounds
- School of Anatomy, Physiology and Human Biology, the University of Western Australia, Nedlands, Western Australia, Australia
| | - T Shavlakadze
- School of Anatomy, Physiology and Human Biology, the University of Western Australia, Nedlands, Western Australia, Australia.,Developmental Biology Group, Agresearch Ltd, Hamilton, New Zealand
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Pedrotti S, Giudice J, Dagnino-Acosta A, Knoblauch M, Singh RK, Hanna A, Mo Q, Hicks J, Hamilton S, Cooper TA. The RNA-binding protein Rbfox1 regulates splicing required for skeletal muscle structure and function. Hum Mol Genet 2015; 24:2360-74. [PMID: 25575511 DOI: 10.1093/hmg/ddv003] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
The Rbfox family of RNA-binding proteins is highly conserved with established roles in alternative splicing (AS) regulation. High-throughput studies aimed at understanding transcriptome remodeling have revealed skeletal muscle as displaying one of the largest number of AS events. This finding is consistent with requirements for tissue-specific protein isoforms needed to sustain muscle-specific functions. Rbfox1 is abundant in vertebrate brain, heart and skeletal muscle. Genome-wide genetic approaches have linked the Rbfox1 gene to autism, and a brain-specific knockout mouse revealed a critical role for this splicing regulator in neuronal function. Moreover, a Caenorhabditis elegans Rbfox1 homolog regulates muscle-specific splicing. To determine the role of Rbfox1 in muscle function, we developed a conditional knockout mouse model to specifically delete Rbfox1 in adult tissue. We show that Rbfox1 is required for muscle function but a >70% loss of Rbfox1 in satellite cells does not disrupt muscle regeneration. Deep sequencing identified aberrant splicing of multiple genes including those encoding myofibrillar and cytoskeletal proteins, and proteins that regulate calcium handling. Ultrastructure analysis of Rbfox1(-/-) muscle by electron microscopy revealed abundant tubular aggregates. Immunostaining showed mislocalization of the sarcoplasmic reticulum proteins Serca1 and Ryr1 in a pattern indicative of colocalization with the tubular aggregates. Consistent with mislocalization of Serca1 and Ryr1, calcium handling was drastically altered in Rbfox1(-/-) muscle. Moreover, muscle function was significantly impaired in Rbfox1(-/-) muscle as indicated by decreased force generation. These results demonstrate that Rbfox1 regulates a network of AS events required to maintain multiple aspects of muscle physiology.
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Affiliation(s)
| | | | | | | | | | - Amy Hanna
- Department of Molecular Physiology and Biophysics
| | - Qianxing Mo
- Dan L. Duncan Cancer Center, Department of Medicine
| | - John Hicks
- Department of Pathology and Immunology, Department of Pediatrics, Baylor College of Medicine, Houston, TX 77030, USA and Texas Children's Hospital, Houston, TX 77030, USA
| | | | - Thomas A Cooper
- Department of Pathology and Immunology, Department of Molecular and Cellular Biology, Department of Molecular Physiology and Biophysics,
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Giacomello E, Quarta M, Paolini C, Squecco R, Fusco P, Toniolo L, Blaauw B, Formoso L, Rossi D, Birkenmeier C, Peters LL, Francini F, Protasi F, Reggiani C, Sorrentino V. Deletion of small ankyrin 1 (sAnk1) isoforms results in structural and functional alterations in aging skeletal muscle fibers. Am J Physiol Cell Physiol 2014; 308:C123-38. [PMID: 25354526 DOI: 10.1152/ajpcell.00090.2014] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Muscle-specific ankyrins 1 (sAnk1) are a group of small ankyrin 1 isoforms, of which sAnk1.5 is the most abundant. sAnk1 are localized in the sarcoplasmic reticulum (SR) membrane from where they interact with obscurin, a myofibrillar protein. This interaction appears to contribute to stabilize the SR close to the myofibrils. Here we report the structural and functional characterization of skeletal muscles from sAnk1 knockout mice (KO). Deletion of sAnk1 did not change the expression and localization of SR proteins in 4- to 6-mo-old sAnk1 KO mice. Structurally, the main modification observed in skeletal muscles of adult sAnk1 KO mice (4-6 mo of age) was the reduction of SR volume at the sarcomere A band level. With increasing age (at 12-15 mo of age) extensor digitorum longus (EDL) skeletal muscles of sAnk1 KO mice develop prematurely large tubular aggregates, whereas diaphragm undergoes significant structural damage. Parallel functional studies revealed specific changes in the contractile performance of muscles from sAnk1 KO mice and a reduced exercise tolerance in an endurance test on treadmill compared with control mice. Moreover, reduced Qγ charge and L-type Ca(2+) current, which are indexes of affected excitation-contraction coupling, were observed in diaphragm fibers from 12- to 15-mo-old mice, but not in other skeletal muscles from sAnk1 KO mice. Altogether, these findings show that the ablation of sAnk1, by altering the organization of the SR, renders skeletal muscles susceptible to undergo structural and functional alterations more evident with age, and point to an important contribution of sAnk1 to the maintenance of the longitudinal SR architecture.
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Affiliation(s)
- E Giacomello
- Molecular Medicine Section, Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy; IIM-Interuniversity Institute of Myology
| | - M Quarta
- Department of Biomedical Sciences, University of Padova, Padua, Italy
| | - C Paolini
- Ce.S.I., Center for Research on Ageing and Department of Neuroscience, Imaging, and Clinical Sciences, University G. d'Annunzio, Chieti, Italy; IIM-Interuniversity Institute of Myology
| | - R Squecco
- Department of Experimental and Clinical Medicine, University of Florence, Florence Italy; IIM-Interuniversity Institute of Myology
| | - P Fusco
- Molecular Medicine Section, Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - L Toniolo
- Department of Biomedical Sciences, University of Padova, Padua, Italy; IIM-Interuniversity Institute of Myology
| | - B Blaauw
- Department of Biomedical Sciences, University of Padova, Padua, Italy; IIM-Interuniversity Institute of Myology; Venetian Institute of Molecular Medicine, Padua, Italy
| | - L Formoso
- Molecular Medicine Section, Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy
| | - D Rossi
- Molecular Medicine Section, Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy; IIM-Interuniversity Institute of Myology
| | | | | | - F Francini
- Department of Experimental and Clinical Medicine, University of Florence, Florence Italy; IIM-Interuniversity Institute of Myology
| | - F Protasi
- Ce.S.I., Center for Research on Ageing and Department of Neuroscience, Imaging, and Clinical Sciences, University G. d'Annunzio, Chieti, Italy; IIM-Interuniversity Institute of Myology
| | - C Reggiani
- Department of Biomedical Sciences, University of Padova, Padua, Italy; IIM-Interuniversity Institute of Myology; CNR-Neuroscience Institute, Padua, Italy; and
| | - V Sorrentino
- Molecular Medicine Section, Department of Molecular and Developmental Medicine, University of Siena, Siena, Italy; IIM-Interuniversity Institute of Myology;
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41
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Endo Y, Noguchi S, Hara Y, Hayashi YK, Motomura K, Miyatake S, Murakami N, Tanaka S, Yamashita S, Kizu R, Bamba M, Goto YI, Matsumoto N, Nonaka I, Nishino I. Dominant mutations in ORAI1 cause tubular aggregate myopathy with hypocalcemia via constitutive activation of store-operated Ca²⁺ channels. Hum Mol Genet 2014; 24:637-48. [PMID: 25227914 DOI: 10.1093/hmg/ddu477] [Citation(s) in RCA: 113] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The store-operated Ca(2+) release-activated Ca(2+) (CRAC) channel is activated by diminished luminal Ca(2+) levels in the endoplasmic reticulum and sarcoplasmic reticulum (SR), and constitutes one of the major Ca(2+) entry pathways in various tissues. Tubular aggregates (TAs) are abnormal structures in the skeletal muscle, and although their mechanism of formation has not been clarified, altered Ca(2+) homeostasis related to a disordered SR is suggested to be one of the main contributing factors. TA myopathy is a hereditary muscle disorder that is pathologically characterized by the presence of TAs. Recently, dominant mutations in the STIM1 gene, encoding a Ca(2+) sensor that controls CRAC channels, have been identified to cause tubular aggregate myopathy (TAM). Here, we identified heterozygous missense mutations in the ORAI1 gene, encoding the CRAC channel itself, in three families affected by dominantly inherited TAM with hypocalcemia. Skeletal myotubes from an affected individual and HEK293 cells expressing mutated ORAI1 proteins displayed spontaneous extracellular Ca(2+) entry into cells without diminishment of luminal Ca(2+) or the association with STIM1. Our results indicate that STIM1-independent activation of CRAC channels induced by dominant mutations in ORAI1 cause altered Ca(2+) homeostasis, resulting in TAM with hypocalcemia.
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Affiliation(s)
- Yukari Endo
- Department of Clinical Development, Translational Medical Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8556, Japan Department of Neuromuscular Research and Department of Pediatrics, Kyoto University Graduate School of Medicine, Kyoto 606-8507, Japan
| | - Satoru Noguchi
- Department of Clinical Development, Translational Medical Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8556, Japan Department of Neuromuscular Research and
| | - Yuji Hara
- Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 615-8510, Japan Tokyo Women's Medical University Institute for Integrated Medical Sciences (TIIMS), Shinjuku, Tokyo 162-8666, Japan
| | - Yukiko K Hayashi
- Department of Clinical Development, Translational Medical Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8556, Japan Department of Neuromuscular Research and Department of Neurophysiology, Tokyo Medical University, Tokyo 160-8402, Japan
| | - Kazushi Motomura
- Department of Clinical Development, Translational Medical Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8556, Japan
| | - Satoko Miyatake
- Department of Human Genetics, Graduate School of Medicine, Yokohama City University, Yokohama 236-0004, Japan
| | - Nobuyuki Murakami
- Department of Pediatrics, Dokkyo Medical University, Koshigaya Hospital, Koshigaya, Saitama 343-8555, Japan
| | - Satsuki Tanaka
- Department of Diabetes and Endocrinology, Osaka Saiseikai Nakatsu Hospital, Osaka 530-0012, Japan
| | - Sumimasa Yamashita
- Division of Pediatric Neurology, Kanagawa Children's Medical Center (KCMC), Yokohama 232-8555, Japan
| | - Rika Kizu
- Division of Pediatrics, Yokosuka Kyosai Hospital, Yokosuka, Kanagawa 238-8558, Japan and
| | - Masahiro Bamba
- Division of Pediatrics, Kawasaki Municipal Hospital, Kawasaki, Kanagawa 210-0013, Japan
| | - Yu-Ichi Goto
- Department of Clinical Development, Translational Medical Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8556, Japan Department of Mental Retardation and Birth Defect Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8502, Japan
| | - Naomichi Matsumoto
- Department of Human Genetics, Graduate School of Medicine, Yokohama City University, Yokohama 236-0004, Japan
| | | | - Ichizo Nishino
- Department of Clinical Development, Translational Medical Center, National Center of Neurology and Psychiatry, Kodaira, Tokyo 187-8556, Japan Department of Neuromuscular Research and
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Hanisch F, Weidemann W, Großmann M, Joshi PR, Holzhausen HJ, Stoltenburg G, Weis J, Zierz S, Horstkorte R. Sialylation and muscle performance: sialic acid is a marker of muscle ageing. PLoS One 2013; 8:e80520. [PMID: 24349002 PMCID: PMC3859654 DOI: 10.1371/journal.pone.0080520] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2013] [Accepted: 10/14/2013] [Indexed: 01/22/2023] Open
Abstract
Sialic acids (Sia) are widely expressed as terminal monosaccharides on eukaryotic glycoconjugates. They are involved in many cellular functions, such as cell-cell interaction and signal recognition. The key enzyme of sialic acid biosynthesis is the bifunctional UDP-N-acetylglucosamine-2-epimerase/N-acetylmannosamine kinase (GNE), which catalyses the first two steps of Sia biosynthesis in the cytosol. In this study we analysed sialylation of muscles in wild type (C57Bl/6 GNE (+/+)) and heterozygous GNE-deficient (C57Bl/6 GNE (+/-)) mice. We measured a significantly lower performance in the initial weeks of a treadmill exercise in C57Bl/6 GNE (+/-) mice compared to wild type C57Bl/6 GNE (+/+) animals. Membrane bound Sia of C57Bl/6 GNE (+/-) mice were reduced by 33-53% at week 24 and by 12-15% at week 80 in comparison to C57Bl/6 GNE (+/+) mice. Interestingly, membrane bound Sia concentration increased with age of the mice by 16-46% in C57Bl/6 GNE (+/+), but by 87-207% in C57Bl/6 GNE (+/-). Furthermore we could identify specific morphological changes in aged muscles. Here we propose that increased Sia concentrations in muscles are a characteristic feature of ageing and could be used as a marker for age-related changes in muscle.
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Affiliation(s)
- Frank Hanisch
- Department of Neurology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Wenke Weidemann
- Institute of Physiological Chemistry, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Mona Großmann
- Department of Neurology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Pushpa Raj Joshi
- Department of Neurology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Hans-Jürgen Holzhausen
- Institute of Pathology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Gisela Stoltenburg
- Department of Neurology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
- Institute of Cell and Neurobiology, Charité, Universitätsmedizin Berlin, Berlin, Germany
| | - Joachim Weis
- Institute of Neuropathology, RWTH Aachen University and JARA Brain Translational Medicine, Aachen, Germany
| | - Stephan Zierz
- Department of Neurology, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
| | - Rüdiger Horstkorte
- Institute of Physiological Chemistry, Martin-Luther-University Halle-Wittenberg, Halle (Saale), Germany
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43
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Fujioka H, Tandler B, Rosca M, McCandless SE, Katirji B, Cohen ML, Rapisuwon S, Hoppel CL. Multiple muscle cell alterations in a case of encephalomyopathy. Ultrastruct Pathol 2013; 38:13-25. [PMID: 24134831 DOI: 10.3109/01913123.2013.831158] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Skeletal muscle from an encephalomyopathy was examined by morphological and biochemical modalities. Mitochondria displayed variability in size, numbers per myocyte, and morphology. Certain organelles had stacks of dense cristae, others contained variable numbers of crystalloids or several lipid droplets. In isolated skeletal muscle mitochondria, oxidative phosphorylation was reduced, but activities of the electron transport chain components were unaffected. This is the second case of adult onset encephalomyopathy with a phenotype overlapping MERRF and Kearns-Sayre syndrome associated with a heteroplasmic mtDNA 3255G > A mutation in the tRNA(UUR(LEU)). This study emphasizes the desirability of a multidisciplinary approach in the diagnosis of complex myopathies.
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Affiliation(s)
- Hisashi Fujioka
- Electron Microscopy Facility and Center for Mitochondrial Disease, School of Medicine
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44
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Multimodal MRI and (31)P-MRS investigations of the ACTA1(Asp286Gly) mouse model of nemaline myopathy provide evidence of impaired in vivo muscle function, altered muscle structure and disturbed energy metabolism. PLoS One 2013; 8:e72294. [PMID: 23977274 PMCID: PMC3748127 DOI: 10.1371/journal.pone.0072294] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2013] [Accepted: 07/15/2013] [Indexed: 02/03/2023] Open
Abstract
Nemaline myopathy (NM), the most common non-dystrophic congenital disease of skeletal muscle, can be caused by mutations in the skeletal muscle α-actin gene (ACTA1) (~25% of all NM cases and up to 50% of severe forms of NM). Muscle function of the recently generated transgenic mouse model carrying the human Asp286Gly mutation in the ACTA1 gene (Tg(ACTA1)(Asp286Gly)) has been mainly investigated in vitro. Therefore, we aimed at providing a comprehensive picture of the in vivo hindlimb muscle function of Tg(ACTA1)(Asp286Gly) mice by combining strictly noninvasive investigations. Skeletal muscle anatomy (hindlimb muscles, intramuscular fat volumes) and microstructure were studied using multimodal magnetic resonance imaging (Dixon, T2, Diffusion Tensor Imaging [DTI]). Energy metabolism was studied using 31-phosphorus Magnetic Resonance Spectroscopy ((31)P-MRS). Skeletal muscle contractile performance was investigated while applying a force-frequency protocol (1-150 Hz) and a fatigue protocol (6 min-1.7 Hz). Tg(ACTA1)(Asp286Gly) mice showed a mild muscle weakness as illustrated by the reduction of both absolute (30%) and specific (15%) maximal force production. Dixon MRI did not show discernable fatty infiltration in Tg(ACTA1)(Asp286Gly) mice indicating that this mouse model does not reproduce human MRI findings. Increased T2 values were observed in Tg(ACTA1)(Asp286Gly) mice and might reflect the occurrence of muscle degeneration/regeneration process. Interestingly, T2 values were linearly related to muscle weakness. DTI experiments indicated lower λ2 and λ3 values in Tg(ACTA1)(Asp286Gly) mice, which might be associated to muscle atrophy and/or the presence of histological anomalies. Finally (31)P-MRS investigations illustrated an increased anaerobic energy cost of contraction in Tg(ACTA1)(Asp286Gly) mice, which might be ascribed to contractile and non-contractile processes. Overall, we provide a unique set of information about the anatomic, metabolic and functional consequences of the Asp286Gly mutation that might be considered as relevant biomarkers for monitoring the severity and/or the progression of NM and for assessing the efficacy of potential therapeutic interventions.
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45
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Franzini-Armstrong C. Letters to the Editor: Junctophilins and SR docking in muscle. FASEB J 2012; 26:1774; author reply 1774-5. [PMID: 22547786 DOI: 10.1096/fj.12-0503ufm] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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46
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Neuromuscular pathology case. J Clin Neuromuscul Dis 2012; 13:113-6. [PMID: 22538305 DOI: 10.1097/cnd.0b013e3182300d04] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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47
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Boncompagni S, Protasi F, Franzini-Armstrong C. Sequential stages in the age-dependent gradual formation and accumulation of tubular aggregates in fast twitch muscle fibers: SERCA and calsequestrin involvement. AGE (DORDRECHT, NETHERLANDS) 2012; 34:27-41. [PMID: 21318331 PMCID: PMC3260353 DOI: 10.1007/s11357-011-9211-y] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/01/2010] [Accepted: 01/24/2011] [Indexed: 05/30/2023]
Abstract
Tubular aggregates (TAs), ordered arrays of elongated sarcoplasmic reticulum (SR) tubules, are present in skeletal muscle from patients with myopathies and are also experimentally induced by extreme anoxia. In wild-type mice TAs develop in a clear age-, sex- (male), and fiber type- (fast twitch) dependence. However, the events preceding the appearance of TAs have not been explored. We investigated the sequential stages leading to the initial appearance and maturation of TAs in EDL from male mice. TAs' formation requires two temporally distinct steps that operate via different mechanisms. Initially (before 1 year of age), the SR Ca(2+) binding protein calsequestrin (CASQ) accumulates specifically at the I band level causing swelling of free SR cisternae. In the second stage, the enlarged SR sacs at the I band level extend into multiple, longitudinally oriented tubules with a full complement of sarco(endo)plasmic reticulum Ca(2+) ATPases (SERCA) in the membrane and CASQ in the lumen. Tubules gradually acquire a regular cylindrical shape and uniform size apparently in concert with partial crystallization of SERCA. Multiple, small TAs associate to form fewer mature TAs of very large size. Interestingly, in fibers from CASQ1-knockout mice abnormal aggregates of SR tubules have different conformation and never develop into ordered aggregates of straight cylinders, possibly due to lack of CASQ accumulation. We conclude that TAs do not arise abruptly but are the final result of a gradually changing SR architecture and we suggest that the crystalline ATPase within the aggregates may be inactive.
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Affiliation(s)
- Simona Boncompagni
- IIM-Interuniversitary Institute of Myology, DNI-Department of Neuroscience and Imaging, CeSI-Centro Scienze dell'Invecchiamento, Università degli Studi G. d'Annunzio, 66013, Chieti, Italy.
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48
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Schiaffino S. Tubular aggregates in skeletal muscle: just a special type of protein aggregates? Neuromuscul Disord 2011; 22:199-207. [PMID: 22154366 DOI: 10.1016/j.nmd.2011.10.005] [Citation(s) in RCA: 62] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2011] [Revised: 09/14/2011] [Accepted: 10/10/2011] [Indexed: 01/28/2023]
Abstract
Tubular aggregates are inclusions, usually found in type II muscle fibers and in males, consisting of regular arrays of tubules derived from the sarcoplasmic reticulum. Tubular aggregates are associated with a wide variety of muscle disorders, including poorly defined "tubular aggregate myopathies" characterized by weakness and/or myalgia and/or cramps, and are also present in different mouse models, including normal aging muscles. The mechanism(s) responsible for inducing the formation of these structures have not been identified, because of the slow time course of their development in vivo, several months in mice. However, identical structures are formed in a few hours in rat muscles kept in vitro in hypoxic medium. Here I suggest that tubular aggregates result from reshaping of sarcoplasmic reticulum caused by misfolding and aggregation of membrane proteins and thus represent a special type of "protein aggregates" due to altered proteostasis.
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Affiliation(s)
- Stefano Schiaffino
- Venetian Institute of Molecular Medicine (VIMM), Padova, Italy; Consiglio Nazionale delle Ricerche Institute of Neuroscience, Padova, Italy.
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49
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Ghosh A, Narayanappa G, Taly AB, Chickbasavaiya YT, Mahadevan A, Vani S, Atchayaram N, Mohapatra I, Susarala KS. Tubular aggregate myopathy: a phenotypic spectrum and morphological study. Neurol India 2011; 58:747-51. [PMID: 21045502 DOI: 10.4103/0028-3886.72166] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Tubular aggregates (TAs) are inclusions described in skeletal muscle in a variety of disorders. In a retrospective analysis, TAs were found in 18 (0.24%) cases and involved a spectrum of clinical phenotypes. Ultrastructurally, four distinct types of aggregates were noted. There was no correlation between the clinical phenotypes, duration of illness and types of TAs.
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Affiliation(s)
- Amrita Ghosh
- Department of Neuropathology, National Institute of Mental Health and Neurosciences, Bangalore, India
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50
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Vitadello M, Doria A, Tarricone E, Ghirardello A, Gorza L. Myofiber stress-response in myositis: parallel investigations on patients and experimental animal models of muscle regeneration and systemic inflammation. Arthritis Res Ther 2010; 12:R52. [PMID: 20334640 PMCID: PMC2888201 DOI: 10.1186/ar2963] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Revised: 01/08/2010] [Accepted: 03/24/2010] [Indexed: 12/17/2022] Open
Abstract
Introduction The endoplasmic reticulum (ER) stress-response, evoked in mice by the overexpression of class I major histocompatibility complex antigen (MHC-I), was proposed as a major mechanism responsible for skeletal muscle damage and dysfunction in autoimmune myositis. The present study was undertaken to characterize in more detail the ER stress-response occurring in myofibers of patients with inflammatory myopathies, focusing on the expression and distribution of Grp94, calreticulin and Grp75, three ER chaperones involved in immunomodulation. Methods Muscle biopsies were obtained from seven healthy subjects and 29 myositis patients, who were subdivided into groups based on the morphological evidence of inflammation and/or sarcolemmal immunoreactivity for MHC-I. Biopsies were analyzed by means of immunohistochemistry and western blot using anti-Grp94, anti-calreticulin and anti-Grp75 specific antibodies. Parallel analyses on these ER chaperones were conducted in rabbit and/or murine skeletal muscle after experimental induction of regeneration or systemic inflammation. Results Upregulation of Grp94 characterized regenerating myofibers of myositis patients (P = 0.03, compared with values detected in biopsies without signs of muscle regeneration) and developing and regenerating myofibers of mouse muscles. Conversely, levels of calreticulin and Grp75 increased about fourfold and twofold, respectively, in patient biopsies positive for sarcolemmal MHC-I immunoreactivity, compared with healthy subjects and patients negative for both inflammation and MHC-I labeling (P < 0.005). Differently from calreticulin, the Grp75 level increased significantly also in patient biopsies that displayed occasional sarcolemmal MHC-I immunoreactivity (P = 0.002), suggesting the interference of other mechanisms. Experimental systemic inflammation achieved in mice and rabbits by a single injection of bacterial lipopolysaccharide significantly increased Grp75 and calreticulin but not MHC-I expression in muscles. Conclusions These results indicate that, in myositis patients, muscle regeneration and inflammation, in addition to MHC-I upregulation, do evoke an ER stress-response characterized by the increased expression of Grp94 and Grp75, respectively. The increase in the muscle Grp75 level in patients showing occasional immunoreactivity for sarcolemmal MHC-I might be considered further as a broader indicator of idiopathic inflammatory myopathy.
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Affiliation(s)
- Maurizio Vitadello
- Institute of Neuroscience - Padova Section, Consiglio Nazionale delle Ricerche, viale G, Colombo 3, 35121 Padova, Italy
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