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Mansat M, Kpotor AO, Chicanne G, Picot M, Mazars A, Flores-Flores R, Payrastre B, Hnia K, Viaud J. MTM1-mediated production of phosphatidylinositol 5-phosphate fuels the formation of podosome-like protrusions regulating myoblast fusion. Proc Natl Acad Sci U S A 2024; 121:e2217971121. [PMID: 38805272 PMCID: PMC11161799 DOI: 10.1073/pnas.2217971121] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 04/10/2024] [Indexed: 05/30/2024] Open
Abstract
Myogenesis is a multistep process that requires a spatiotemporal regulation of cell events resulting finally in myoblast fusion into multinucleated myotubes. Most major insights into the mechanisms underlying fusion seem to be conserved from insects to mammals and include the formation of podosome-like protrusions (PLPs) that exert a driving force toward the founder cell. However, the machinery that governs this process remains poorly understood. In this study, we demonstrate that MTM1 is the main enzyme responsible for the production of phosphatidylinositol 5-phosphate, which in turn fuels PI5P 4-kinase α to produce a minor and functional pool of phosphatidylinositol 4,5-bisphosphate that concentrates in PLPs containing the scaffolding protein Tks5, Dynamin-2, and the fusogenic protein Myomaker. Collectively, our data reveal a functional crosstalk between a PI-phosphatase and a PI-kinase in the regulation of PLP formation.
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Affiliation(s)
- Mélanie Mansat
- INSERM UMR1297, University of Toulouse 3, Institute of Metabolic and Cardiovascular Diseases (I2MC)31432, Toulouse Cedex 04, France
| | - Afi Oportune Kpotor
- INSERM UMR1297, University of Toulouse 3, Institute of Metabolic and Cardiovascular Diseases (I2MC)31432, Toulouse Cedex 04, France
| | - Gaëtan Chicanne
- INSERM UMR1297, University of Toulouse 3, Institute of Metabolic and Cardiovascular Diseases (I2MC)31432, Toulouse Cedex 04, France
| | - Mélanie Picot
- INSERM UMR1297, University of Toulouse 3, Institute of Metabolic and Cardiovascular Diseases (I2MC)31432, Toulouse Cedex 04, France
| | - Anne Mazars
- INSERM UMR1297, University of Toulouse 3, Institute of Metabolic and Cardiovascular Diseases (I2MC)31432, Toulouse Cedex 04, France
| | - Rémy Flores-Flores
- INSERM UMR1297, University of Toulouse 3, Institute of Metabolic and Cardiovascular Diseases (I2MC)31432, Toulouse Cedex 04, France
| | - Bernard Payrastre
- INSERM UMR1297, University of Toulouse 3, Institute of Metabolic and Cardiovascular Diseases (I2MC)31432, Toulouse Cedex 04, France
- Hematology Laboratory, University Hospital of Toulouse31059, Toulouse Cedex 03, France
| | - Karim Hnia
- INSERM UMR1297, University of Toulouse 3, Institute of Metabolic and Cardiovascular Diseases (I2MC)31432, Toulouse Cedex 04, France
| | - Julien Viaud
- INSERM UMR1297, University of Toulouse 3, Institute of Metabolic and Cardiovascular Diseases (I2MC)31432, Toulouse Cedex 04, France
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2
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Karolczak S, Deshwar AR, Aristegui E, Kamath BM, Lawlor MW, Andreoletti G, Volpatti J, Ellis JL, Yin C, Dowling JJ. Loss of Mtm1 causes cholestatic liver disease in a model of X-linked myotubular myopathy. J Clin Invest 2023; 133:e166275. [PMID: 37490339 PMCID: PMC10503795 DOI: 10.1172/jci166275] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Accepted: 07/19/2023] [Indexed: 07/27/2023] Open
Abstract
X-linked myotubular myopathy (XLMTM) is a fatal congenital disorder caused by mutations in the MTM1 gene. Currently, there are no approved treatments, although AAV8-mediated gene transfer therapy has shown promise in animal models and preliminarily in patients. However, 4 patients with XLMTM treated with gene therapy have died from progressive liver failure, and hepatobiliary disease has now been recognized more broadly in association with XLMTM. In an attempt to understand whether loss of MTM1 itself is associated with liver pathology, we have characterized what we believe to be a novel liver phenotype in a zebrafish model of this disease. Specifically, we found that loss-of-function mutations in mtm1 led to severe liver abnormalities including impaired bile flux, structural abnormalities of the bile canaliculus, and improper endosome-mediated trafficking of canalicular transporters. Using a reporter-tagged Mtm1 zebrafish line, we established localization of Mtm1 in the liver in association with Rab11, a marker of recycling endosomes, and canalicular transport proteins and demonstrated that hepatocyte-specific reexpression of Mtm1 could rescue the cholestatic phenotype. Last, we completed a targeted chemical screen and found that Dynasore, a dynamin-2 inhibitor, was able to partially restore bile flow and transporter localization to the canalicular membrane. In summary, we demonstrate, for the first time to our knowledge, liver abnormalities that were directly caused by MTM1 mutation in a preclinical model, thus establishing the critical framework for better understanding and comprehensive treatment of the human disease.
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Affiliation(s)
- Sophie Karolczak
- Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Molecular Genetics, The University of Toronto, Toronto, Ontario, Canada
| | - Ashish R. Deshwar
- Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
- Division of Clinical and Metabolic Genetics and
| | - Evangelina Aristegui
- Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Binita M. Kamath
- Division of Gastroenterology, Hepatology and Nutrition, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Michael W. Lawlor
- Medical College of Wisconsin, Milwaukee, Wisconsin, USA
- Translational Science Laboratory, Milwaukee, Wisconsin, USA
| | | | - Jonathan Volpatti
- Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Jillian L. Ellis
- Division of Gastroenterology, Hepatology and Nutrition and Division of Developmental Biology and
| | - Chunyue Yin
- Division of Gastroenterology, Hepatology and Nutrition and Division of Developmental Biology and
- Center for Undiagnosed and Rare Liver Diseases, Cincinnati Children’s Hospital Medical Center, Cincinnati, Ohio, USA
| | - James J. Dowling
- Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Molecular Genetics, The University of Toronto, Toronto, Ontario, Canada
- Division of Neurology, The Hospital for Sick Children, Toronto, Ontario, Canada
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3
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Bhattacharyya T, Ghosh A, Verma S, Raghu P, Sowdhamini R. Structural rationale to understand the effect of disease-associated mutations on Myotubularin. Curr Res Struct Biol 2023; 5:100100. [PMID: 37101954 PMCID: PMC10123148 DOI: 10.1016/j.crstbi.2023.100100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 02/16/2023] [Accepted: 02/28/2023] [Indexed: 03/29/2023] Open
Abstract
Myotubularin or MTM1 is a lipid phosphatase that regulates vesicular trafficking in the cell. The MTM1 gene is mutated in a severe form of muscular disease, X-linked myotubular myopathy or XLMTM, affecting 1 in 50,000 newborn males worldwide. There have been several studies on the disease pathology of XLMTM, but the structural effects of missense mutations of MTM1 are underexplored due to the unavailability of a crystal structure. MTM1 consists of three domains-a lipid-binding N-terminal GRAM domain, the phosphatase domain and a coiled-coil domain which aids dimerisation of Myotubularin homologs. While most mutations reported to date map to the phosphatase domain of MTM1, the other two domains on the sequence are also frequently mutated in XLMTM. To understand the overall structural and functional effects of missense mutations on MTM1, we curated several missense mutations and performed in silico and in vitro studies. Apart from significantly impaired binding to substrate, abrogation of phosphatase activity was observed for a few mutants. Possible long-range effects of mutations from non-catalytic domains on phosphatase activity were observed as well. Coiled-coil domain mutants have been characterised here for the first time in XLMTM literature.
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4
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Chen YL, Hsieh CC, Chu PM, Chen JY, Huang YC, Chen CY. Roles of protein tyrosine phosphatases in hepatocellular carcinoma progression (Review). Oncol Rep 2023; 49:48. [PMID: 36660927 PMCID: PMC9887465 DOI: 10.3892/or.2023.8485] [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: 08/11/2022] [Accepted: 11/15/2022] [Indexed: 01/20/2023] Open
Abstract
Hepatocellular carcinoma (HCC) represents almost 80% of all liver cancers, is the sixth most common cancer and is the second‑highest cause of cancer‑related deaths worldwide. Protein tyrosine phosphatases (PTPs), which are encoded by the largest family of phosphatase genes, play critical roles in cellular responses and are implicated in various signaling pathways. Moreover, PTPs are dysregulated and involved in various cellular processes in numerous cancers, including HCC. Kinases and phosphatases are coordinators that modulate cell activities and regulate signaling responses. There are multiple interacting signaling networks, and coordination of these signaling networks in response to a stimulus determines the physiological outcome. Numerous issues, such as drug resistance and inflammatory reactions in the tumor microenvironment, are implicated in cancer progression, and the role of PTPs in these processes has not been well elucidated. Therefore, the present review focused on discussing the relationship of PTPs with inflammatory cytokines and chemotherapy/targeted drug resistance, providing detailed information on how PTPs can modulate inflammatory reactions and drug resistance to influence progression in HCC.
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Affiliation(s)
- Yi-Li Chen
- Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan, R.O.C
| | - Ching-Chuan Hsieh
- Division of General Surgery, Chang Gung Memorial Hospital, Chiayi 613, Taiwan, R.O.C
| | - Pei-Ming Chu
- Department of Anatomy, School of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan, R.O.C
| | - Jing-Yi Chen
- Department of Medical Laboratory Science, College of Medicine, I‑Shou University, Kaohsiung 82445, Taiwan, R.O.C
| | - Yu-Chun Huang
- Aging and Diseases Prevention Research Center, Fooyin University, Kaohsiung 83102, Taiwan, R.O.C
| | - Cheng-Yi Chen
- Department of Cell Biology and Anatomy, College of Medicine, National Cheng Kung University, Tainan 70101, Taiwan, R.O.C
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5
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Szentesi P, Dienes B, Kutchukian C, Czirjak T, Buj-Bello A, Jacquemond V, Csernoch L. Disrupted T-tubular network accounts for asynchronous calcium release in MTM1-deficient skeletal muscle. J Physiol 2023; 601:99-121. [PMID: 36408764 PMCID: PMC10107287 DOI: 10.1113/jp283650] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 11/14/2022] [Indexed: 11/22/2022] Open
Abstract
In mammalian skeletal muscle, the propagation of surface membrane depolarization into the interior of the muscle fibre along the transverse (T) tubular network is essential for the synchronized release of calcium from the sarcoplasmic reticulum (SR) via ryanodine receptors (RyRs) in response to the conformational change in the voltage-sensor dihydropyridine receptors. Deficiency in 3-phosphoinositide phosphatase myotubularin (MTM1) has been reported to disrupt T-tubules, resulting in impaired SR calcium release. Here confocal calcium transients recorded in muscle fibres of MTM1-deficient mice were compared with the results from a model where propagation of the depolarization along the T-tubules was modelled mathematically with disruptions in the network assumed to modify the access and transmembrane resistance as well as the capacitance. If, in simulations, T-tubules were assumed to be partially or completely inaccessible to the depolarization and RyRs at these points to be prime for calcium-induced calcium release, all the features of measured SR calcium release could be reproduced. We conclude that the inappropriate propagation of the depolarization into the fibre interior is the initial critical cause of severely impaired SR calcium release in MTM1 deficiency, while the Ca2+ -triggered opening of RyRs provides an alleviating support to the diseased process. KEY POINTS: Myotubular myopathy is a fatal disease due to genetic deficiency in the phosphoinositide phosphatase MTM1. Although the causes are known and corresponding gene therapy strategies are being developed, there is no mechanistic understanding of the disease-associated muscle function failure. Resolving this issue is of primary interest not only for a fundamental understanding of how MTM1 is critical for healthy muscle function, but also for establishing the related cellular mechanisms most primarily or stringently affected by the disease, which are thus of potential interest as therapy targets. The mathematical modelling approach used in the present work proves that the disease-associated alteration of the plasma membrane invagination network is sufficient to explain the dysfunctions of excitation-contraction coupling, providing the first integrated quantitative framework that explains the associated contraction failure.
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Affiliation(s)
- Peter Szentesi
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Beatrix Dienes
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Candice Kutchukian
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR-5261, INSERM U-1315, Institut NeuroMyoGène, Lyon, France
| | - Tamas Czirjak
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Ana Buj-Bello
- Genethon, Evry, France.,Université Paris-Saclay, Evry, France
| | - Vincent Jacquemond
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR-5261, INSERM U-1315, Institut NeuroMyoGène, Lyon, France
| | - László Csernoch
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary.,ELRN-UD Cell Physiology Research Group, Debrecen, Hungary
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6
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Gómez-Oca R, Edelweiss E, Djeddi S, Gerbier M, Massana-Muñoz X, Oulad-Abdelghani M, Crucifix C, Spiegelhalter C, Messaddeq N, Poussin-Courmontagne P, Koebel P, Cowling BS, Laporte J. Differential impact of ubiquitous and muscle dynamin 2 isoforms in muscle physiology and centronuclear myopathy. Nat Commun 2022; 13:6849. [PMID: 36369230 PMCID: PMC9652393 DOI: 10.1038/s41467-022-34490-4] [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: 09/06/2021] [Accepted: 10/27/2022] [Indexed: 11/13/2022] Open
Abstract
Dynamin 2 mechanoenzyme is a key regulator of membrane remodeling and gain-of-function mutations in its gene cause centronuclear myopathies. Here, we investigate the functions of dynamin 2 isoforms and their associated phenotypes and, specifically, the ubiquitous and muscle-specific dynamin 2 isoforms expressed in skeletal muscle. In cell-based assays, we show that a centronuclear myopathy-related mutation in the ubiquitous but not the muscle-specific dynamin 2 isoform causes increased membrane fission. In vivo, overexpressing the ubiquitous dynamin 2 isoform correlates with severe forms of centronuclear myopathy, while overexpressing the muscle-specific isoform leads to hallmarks seen in milder cases of the disease. Previous mouse studies suggested that reduction of the total dynamin 2 pool could be therapeutic for centronuclear myopathies. Here, dynamin 2 splice switching from muscle-specific to ubiquitous dynamin 2 aggravated the phenotype of a severe X-linked form of centronuclear myopathy caused by loss-of-function of the MTM1 phosphatase, supporting the importance of targeting the ubiquitous isoform for efficient therapy in muscle. Our results highlight that the ubiquitous and not the muscle-specific dynamin 2 isoform is the main modifier contributing to centronuclear myopathy pathology.
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Affiliation(s)
- Raquel Gómez-Oca
- grid.420255.40000 0004 0638 2716Dpt Translational Medicine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France ,Dynacure, Illkirch, France
| | - Evelina Edelweiss
- grid.420255.40000 0004 0638 2716Dpt Translational Medicine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | - Sarah Djeddi
- grid.420255.40000 0004 0638 2716Dpt Translational Medicine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | | | - Xènia Massana-Muñoz
- grid.420255.40000 0004 0638 2716Dpt Translational Medicine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | - Mustapha Oulad-Abdelghani
- grid.420255.40000 0004 0638 2716Core platforms, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | - Corinne Crucifix
- grid.420255.40000 0004 0638 2716Integrated Structural Biology platform, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | - Coralie Spiegelhalter
- grid.420255.40000 0004 0638 2716Core platforms, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | - Nadia Messaddeq
- grid.420255.40000 0004 0638 2716Core platforms, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | - Pierre Poussin-Courmontagne
- grid.420255.40000 0004 0638 2716Integrated Structural Biology platform, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | - Pascale Koebel
- grid.420255.40000 0004 0638 2716Core platforms, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
| | | | - Jocelyn Laporte
- grid.420255.40000 0004 0638 2716Dpt Translational Medicine, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), INSERM U1258, Université de Strasbourg, CNRS UMR7104 Illkirch, France
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7
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Sullivan R, Montgomery A, Scipioni A, Jhaveri P, Schmidt AT, Hicks SD. Confounding Factors Impacting microRNA Expression in Human Saliva: Methodological and Biological Considerations. Genes (Basel) 2022; 13:genes13101874. [PMID: 36292760 PMCID: PMC9602126 DOI: 10.3390/genes13101874] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 10/13/2022] [Accepted: 10/14/2022] [Indexed: 11/04/2022] Open
Abstract
There is growing interest in saliva microRNAs (miRNAs) as non-invasive biomarkers for human disease. Such an approach requires understanding how differences in experimental design affect miRNA expression. Variations in technical methodologies, coupled with inter-individual variability may reduce study reproducibility and generalizability. Another barrier facing salivary miRNA biomarker research is a lack of recognized “control miRNAs”. In one of the largest studies of human salivary miRNA to date (922 healthy individuals), we utilized 1225 saliva samples to quantify variability in miRNA expression resulting from aligner selection (Bowtie1 vs. Bowtie2), saliva collection method (expectorated vs. swabbed), RNA stabilizer (presence vs. absence), and individual biological factors (sex, age, body mass index, exercise, caloric intake). Differential expression analyses revealed that absence of RNA stabilizer introduced the greatest variability, followed by differences in methods of collection and aligner. Biological factors generally affected a smaller number of miRNAs. We also reported coefficients of variations for 643 miRNAs consistently present in saliva, highlighting several salivary miRNAs to serve as reference genes. Thus, the results of this analysis can be used by researchers to optimize parameters of salivary miRNA measurement, exclude miRNAs confounded by numerous biologic factors, and identify appropriate miRNA controls.
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Affiliation(s)
- Rhea Sullivan
- Department of Pediatrics, Penn State Hershey College of Medicine, Hershey, PA 17033, USA
| | - Austin Montgomery
- Department of Pediatrics, Penn State Hershey College of Medicine, Hershey, PA 17033, USA
| | - Anna Scipioni
- Department of Pediatrics, Penn State Hershey College of Medicine, Hershey, PA 17033, USA
- Department of Obstetrics, Morsani College of Medicine, University of Southern Florida, Tampa, FL 33606, USA
| | - Pooja Jhaveri
- Department of Pediatrics, Penn State Hershey College of Medicine, Hershey, PA 17033, USA
| | - Adam T. Schmidt
- Department of Psychological Sciences, Texas Tech University, Lubbock, TX 79409, USA
| | - Steven D. Hicks
- Department of Pediatrics, Penn State Hershey College of Medicine, Hershey, PA 17033, USA
- Correspondence: ; Tel.: +1-717-531-0003
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8
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Antagonistic control of active surface integrins by myotubularin and phosphatidylinositol 3-kinase C2β in a myotubular myopathy model. Proc Natl Acad Sci U S A 2022; 119:e2202236119. [PMID: 36161941 DOI: 10.1073/pnas.2202236119] [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: 11/18/2022] Open
Abstract
X-linked centronuclear myopathy (XLCNM) is a severe human disease without existing therapies caused by mutations in the phosphoinositide 3-phosphatase MTM1. Loss of MTM1 function is associated with muscle fiber defects characterized by impaired localization of β-integrins and other components of focal adhesions. Here we show that defective focal adhesions and reduced active β-integrin surface levels in a cellular model of XLCNM are rescued by loss of phosphatidylinositiol 3-kinase C2β (PI3KC2β) function. Inactivation of the Mtm1 gene impaired myoblast differentiation into myotubes and resulted in reduced surface levels of active β1-integrins as well as corresponding defects in focal adhesions. These phenotypes were rescued by concomitant genetic loss of Pik3c2b or pharmacological inhibition of PI3KC2β activity. We further demonstrate that a hitherto unknown role of PI3KC2β in the endocytic trafficking of active β1-integrins rather than rescue of phosphatidylinositol 3-phosphate levels underlies the ability of Pik3c2b to act as a genetic modifier of cellular XLCNM phenotypes. Our findings reveal a crucial antagonistic function of MTM1 and PI3KC2β in the control of active β-integrin surface levels, thereby providing a molecular mechanism for the adhesion and myofiber defects observed in XLCNM. They further suggest specific pharmacological inhibition of PI3KC2β catalysis as a viable treatment option for XLCNM patients.
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9
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El Andari J, Renaud-Gabardos E, Tulalamba W, Weinmann J, Mangin L, Pham QH, Hille S, Bennett A, Attebi E, Bourges E, Leborgne C, Guerchet N, Fakhiri J, Krämer C, Wiedtke E, McKenna R, Guianvarc’h L, Toueille M, Ronzitti G, Hebben M, Mingozzi F, VandenDriessche T, Agbandje-McKenna M, Müller OJ, Chuah MK, Buj-Bello A, Grimm D. Semirational bioengineering of AAV vectors with increased potency and specificity for systemic gene therapy of muscle disorders. SCIENCE ADVANCES 2022; 8:eabn4704. [PMID: 36129972 PMCID: PMC9491714 DOI: 10.1126/sciadv.abn4704] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 08/03/2022] [Indexed: 05/31/2023]
Abstract
Bioengineering of viral vectors for therapeutic gene delivery is a pivotal strategy to reduce doses, facilitate manufacturing, and improve efficacy and patient safety. Here, we engineered myotropic adeno-associated viral (AAV) vectors via a semirational, combinatorial approach that merges AAV capsid and peptide library screens. We first identified shuffled AAVs with increased specificity in the murine skeletal muscle, diaphragm, and heart, concurrent with liver detargeting. Next, we boosted muscle specificity by displaying a myotropic peptide on the capsid surface. In a mouse model of X-linked myotubular myopathy, the best vectors-AAVMYO2 and AAVMYO3-prolonged survival, corrected growth, restored strength, and ameliorated muscle fiber size and centronucleation. In a mouse model of Duchenne muscular dystrophy, our lead capsid induced robust microdystrophin expression and improved muscle function. Our pipeline is compatible with complementary AAV genome bioengineering strategies, as demonstrated here with two promoters, and could benefit many clinical applications beyond muscle gene therapy.
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Affiliation(s)
- Jihad El Andari
- Medical Faculty, Department of Infectious Diseases/Virology, Section Viral Vector Technologies, Cluster of Excellence CellNetworks, University of Heidelberg, 69120 Heidelberg, Germany
- BioQuant, University of Heidelberg, 69120 Heidelberg, Germany
| | - Edith Renaud-Gabardos
- Genethon, 91000 Evry, France
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, 91000 Evry, France
| | - Warut Tulalamba
- Department of Gene Therapy and Regenerative Medicine, Vrije Universiteit Brussel (VUB), Brussels 1090, Belgium
| | - Jonas Weinmann
- Medical Faculty, Department of Infectious Diseases/Virology, Section Viral Vector Technologies, Cluster of Excellence CellNetworks, University of Heidelberg, 69120 Heidelberg, Germany
- BioQuant, University of Heidelberg, 69120 Heidelberg, Germany
| | - Louise Mangin
- Genethon, 91000 Evry, France
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, 91000 Evry, France
| | - Quang Hong Pham
- Department of Gene Therapy and Regenerative Medicine, Vrije Universiteit Brussel (VUB), Brussels 1090, Belgium
| | - Susanne Hille
- University Hospital Schleswig-Holstein, Campus Kiel, Innere Medizin III, 24105 Kiel, Germany
- German Center for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Kiel, Germany
| | - Antonette Bennett
- Department of Biochemistry and Molecular Biology, Center for Structural Biology, McKnight Brain Institute, University of Florida, Gainesville, FL 32610, USA
| | | | | | - Christian Leborgne
- Genethon, 91000 Evry, France
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, 91000 Evry, France
| | | | - Julia Fakhiri
- Medical Faculty, Department of Infectious Diseases/Virology, Section Viral Vector Technologies, Cluster of Excellence CellNetworks, University of Heidelberg, 69120 Heidelberg, Germany
- BioQuant, University of Heidelberg, 69120 Heidelberg, Germany
| | - Chiara Krämer
- Medical Faculty, Department of Infectious Diseases/Virology, Section Viral Vector Technologies, Cluster of Excellence CellNetworks, University of Heidelberg, 69120 Heidelberg, Germany
- BioQuant, University of Heidelberg, 69120 Heidelberg, Germany
| | - Ellen Wiedtke
- Medical Faculty, Department of Infectious Diseases/Virology, Section Viral Vector Technologies, Cluster of Excellence CellNetworks, University of Heidelberg, 69120 Heidelberg, Germany
- BioQuant, University of Heidelberg, 69120 Heidelberg, Germany
| | - Robert McKenna
- Department of Biochemistry and Molecular Biology, Center for Structural Biology, McKnight Brain Institute, University of Florida, Gainesville, FL 32610, USA
| | | | | | - Giuseppe Ronzitti
- Genethon, 91000 Evry, France
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, 91000 Evry, France
| | | | - Federico Mingozzi
- Genethon, 91000 Evry, France
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, 91000 Evry, France
| | - Thierry VandenDriessche
- Department of Gene Therapy and Regenerative Medicine, Vrije Universiteit Brussel (VUB), Brussels 1090, Belgium
- Center for Molecular and Vascular Biology, Department of Cardiovascular Sciences, University of Leuven, Leuven 3000, Belgium
| | - Mavis Agbandje-McKenna
- Department of Biochemistry and Molecular Biology, Center for Structural Biology, McKnight Brain Institute, University of Florida, Gainesville, FL 32610, USA
| | - Oliver J. Müller
- University Hospital Schleswig-Holstein, Campus Kiel, Innere Medizin III, 24105 Kiel, Germany
- German Center for Cardiovascular Research (DZHK), partner site Hamburg/Kiel/Lübeck, Kiel, Germany
| | - Marinee K. Chuah
- Department of Gene Therapy and Regenerative Medicine, Vrije Universiteit Brussel (VUB), Brussels 1090, Belgium
- Center for Molecular and Vascular Biology, Department of Cardiovascular Sciences, University of Leuven, Leuven 3000, Belgium
| | - Ana Buj-Bello
- Genethon, 91000 Evry, France
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, 91000 Evry, France
| | - Dirk Grimm
- Medical Faculty, Department of Infectious Diseases/Virology, Section Viral Vector Technologies, Cluster of Excellence CellNetworks, University of Heidelberg, 69120 Heidelberg, Germany
- BioQuant, University of Heidelberg, 69120 Heidelberg, Germany
- German Center for Infection Research (DZIF) and German Center for Cardiovascular Research (DZHK), partner site Heidelberg, Heidelberg, Germany
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10
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Volpatti JR, Ghahramani-Seno MM, Mansat M, Sabha N, Sarikaya E, Goodman SJ, Chater-Diehl E, Celik A, Pannia E, Froment C, Combes-Soia L, Maani N, Yuki KE, Chicanne G, Uusküla-Reimand L, Monis S, Alvi SA, Genetti CA, Payrastre B, Beggs AH, Bonnemann CG, Muntoni F, Wilson MD, Weksberg R, Viaud J, Dowling JJ. X-linked myotubular myopathy is associated with epigenetic alterations and is ameliorated by HDAC inhibition. Acta Neuropathol 2022; 144:537-563. [PMID: 35844027 PMCID: PMC9381459 DOI: 10.1007/s00401-022-02468-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 07/04/2022] [Accepted: 07/04/2022] [Indexed: 12/29/2022]
Abstract
X-linked myotubular myopathy (XLMTM) is a fatal neuromuscular disorder caused by loss of function mutations in MTM1. At present, there are no directed therapies for XLMTM, and incomplete understanding of disease pathomechanisms. To address these knowledge gaps, we performed a drug screen in mtm1 mutant zebrafish and identified four positive hits, including valproic acid, which functions as a potent suppressor of the mtm1 zebrafish phenotype via HDAC inhibition. We translated these findings to a mouse XLMTM model, and showed that valproic acid ameliorates the murine phenotype. These observations led us to interrogate the epigenome in Mtm1 knockout mice; we found increased DNA methylation, which is normalized with valproic acid, and likely mediated through aberrant 1-carbon metabolism. Finally, we made the unexpected observation that XLMTM patients share a distinct DNA methylation signature, suggesting that epigenetic alteration is a conserved disease feature amenable to therapeutic intervention.
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MESH Headings
- Animals
- Disease Models, Animal
- Epigenesis, Genetic
- Mice
- Muscle, Skeletal/metabolism
- Myopathies, Structural, Congenital/drug therapy
- Myopathies, Structural, Congenital/genetics
- Myopathies, Structural, Congenital/metabolism
- Protein Tyrosine Phosphatases, Non-Receptor/genetics
- Protein Tyrosine Phosphatases, Non-Receptor/metabolism
- Valproic Acid/metabolism
- Valproic Acid/pharmacology
- Zebrafish/metabolism
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Affiliation(s)
- Jonathan R Volpatti
- Department of Molecular Genetics, University of Toronto, Toronto, ON, M5S 1A1, Canada
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada
| | - Mehdi M Ghahramani-Seno
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada
| | - Mélanie Mansat
- Institute of Cardiovascular and Metabolic Diseases (I2MC), INSERM, UMR-S U1297 and University of Toulouse III, CHU-Rangueil, Toulouse, France
| | - Nesrin Sabha
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada
| | - Ege Sarikaya
- Department of Molecular Genetics, University of Toronto, Toronto, ON, M5S 1A1, Canada
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada
| | - Sarah J Goodman
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada
- Institute of Medical Sciences, University of Toronto, Toronto, ON, M5S 1A1, Canada
| | - Eric Chater-Diehl
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada
| | - Alper Celik
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada
| | - Emanuela Pannia
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada
| | - Carine Froment
- Institut de Pharmacologie Et Biologie Structurale (IPBS), Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Lucie Combes-Soia
- Institut de Pharmacologie Et Biologie Structurale (IPBS), Université de Toulouse, CNRS, UPS, Toulouse, France
| | - Nika Maani
- Department of Molecular Genetics, University of Toronto, Toronto, ON, M5S 1A1, Canada
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada
| | - Kyoko E Yuki
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada
| | - Gaëtan Chicanne
- Institute of Cardiovascular and Metabolic Diseases (I2MC), INSERM, UMR-S U1297 and University of Toulouse III, CHU-Rangueil, Toulouse, France
| | - Liis Uusküla-Reimand
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada
| | - Simon Monis
- Department of Molecular Genetics, University of Toronto, Toronto, ON, M5S 1A1, Canada
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada
| | - Sana Akhtar Alvi
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada
| | - Casie A Genetti
- Division of Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Bernard Payrastre
- Institute of Cardiovascular and Metabolic Diseases (I2MC), INSERM, UMR-S U1297 and University of Toulouse III, CHU-Rangueil, Toulouse, France
- Laboratoire d'Hématologie, Centre Hospitalier Universitaire (CHU) de Toulouse, Toulouse Cedex, France
| | - Alan H Beggs
- Division of Genetics and Genomics, The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Carsten G Bonnemann
- Neuromuscular and Neurogenetic Disorders of Childhood Section, NINDS, NIH, Bethesda, MD, USA
| | - Francesco Muntoni
- Dubowitz Neuromuscular Centre, NIHR Great Ormond Street Hospital Biomedical Research Centre, Great Ormond Street Institute of Child Health, University College London, London, UK
| | - Michael D Wilson
- Department of Molecular Genetics, University of Toronto, Toronto, ON, M5S 1A1, Canada
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada
- Program for Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON, M5G 0A4, Canada
| | - Rosanna Weksberg
- Department of Molecular Genetics, University of Toronto, Toronto, ON, M5S 1A1, Canada
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada
- Department of Paediatrics, University of Toronto, Toronto, ON, M5S 1A1, Canada
- Division of Clinical and Metabolic Genetics, The Hospital for Sick Children, Toronto, ON, M5G 0A4, Canada
| | - Julien Viaud
- Institute of Cardiovascular and Metabolic Diseases (I2MC), INSERM, UMR-S U1297 and University of Toulouse III, CHU-Rangueil, Toulouse, France
| | - James J Dowling
- Department of Molecular Genetics, University of Toronto, Toronto, ON, M5S 1A1, Canada.
- Program for Genetics and Genome Biology, The Hospital for Sick Children, 555 University Ave, Toronto, ON, M5G 0A4, Canada.
- Department of Paediatrics, University of Toronto, Toronto, ON, M5S 1A1, Canada.
- Division of Neurology, The Hospital for Sick Children, Toronto, ON, M5G 0A4, Canada.
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11
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Sarikaya E, Sabha N, Volpatti J, Pannia E, Maani N, Gonorazky HD, Celik A, Liang Y, Onofre-Oliveira P, Dowling JJ. Natural history of a mouse model of X-linked myotubular myopathy. Dis Model Mech 2022; 15:276037. [PMID: 35694952 PMCID: PMC9346535 DOI: 10.1242/dmm.049342] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 06/06/2022] [Indexed: 11/20/2022] Open
Abstract
X-linked myotubular myopathy (XLMTM) is a severe monogenetic disorder of the skeletal muscle. It is caused by loss-of-expression/function mutations in the myotubularin (MTM1) gene. Much of what is known about the disease, as well as the treatment strategies, has been uncovered through experimentation in pre-clinical models, particularly the Mtm1 gene knockout mouse line (Mtm1 KO). Despite this understanding, and the identification of potential therapies, much remains to be understood about XLMTM disease pathomechanisms, and about the normal functions of MTM1 in muscle development. To lay the groundwork for addressing these knowledge gaps, we performed a natural history study of Mtm1 KO mice. This included longitudinal comparative analyses of motor phenotype, transcriptome and proteome profiles, muscle structure and targeted molecular pathways. We identified age-associated changes in gene expression, mitochondrial function, myofiber size and key molecular markers, including DNM2. Importantly, some molecular and histopathologic changes preceded overt phenotypic changes, while others, such as triad structural alternations, occurred coincidentally with the presence of severe weakness. In total, this study provides a comprehensive longitudinal evaluation of the murine XLMTM disease process, and thus provides a critical framework for future investigations. Summary: This study provides a comprehensive and longitudinal molecular and phenotypic evaluation of the disease process of X-linked myotubular myopathy (XLMTM) in a murine model.
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Affiliation(s)
- Ege Sarikaya
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, Ontario, M5G 1X8, Canada.,Departments of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, Ontario, M5S 1A8, Canada
| | - Nesrin Sabha
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, Ontario, M5G 1X8, Canada
| | - Jonathan Volpatti
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, Ontario, M5G 1X8, Canada.,Departments of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, Ontario, M5S 1A8, Canada
| | - Emanuela Pannia
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, Ontario, M5G 1X8, Canada.,Departments of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, Ontario, M5S 1A8, Canada
| | - Nika Maani
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, Ontario, M5G 1X8, Canada.,Departments of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, Ontario, M5S 1A8, Canada
| | - Hernan D Gonorazky
- Division of Neurology, Hospital for Sick Children, 686 Bay Street, Toronto, Ontario, M5G 1X8, Canada
| | - Alper Celik
- Centre for Computational Medicine, Hospital for Sick Children, 686 Bay Street, Toronto, Ontario, M5G 1X8, Canada
| | - Yijng Liang
- Centre for Computational Medicine, Hospital for Sick Children, 686 Bay Street, Toronto, Ontario, M5G 1X8, Canada
| | - Paula Onofre-Oliveira
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, Ontario, M5G 1X8, Canada
| | - James J Dowling
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, Ontario, M5G 1X8, Canada.,Departments of Molecular Genetics, University of Toronto, 1 King's College Circle, Toronto, Ontario, M5S 1A8, Canada.,Division of Neurology, Hospital for Sick Children, 686 Bay Street, Toronto, Ontario, M5G 1X8, Canada.,Departments of Paediatrics, University of Toronto, 1 King's College Circle, Toronto, Ontario, M5S 1A8, Canada
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12
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Buono S, Monseur A, Menuet A, Robé A, Koch C, Laporte J, Thielemans L, Depla M, Cowling BS. Natural history study and statistical modelling of disease progression in a preclinical model of myotubular myopathy. Dis Model Mech 2022; 15:276036. [PMID: 35642830 PMCID: PMC9346515 DOI: 10.1242/dmm.049284] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2021] [Accepted: 05/23/2022] [Indexed: 11/20/2022] Open
Abstract
Generating reliable preclinical data in animal models of disease is essential in therapy development. Here we perform statistical analysis and joint longitudinal-survival modelling of the progressive phenotype observed in Mtm1-/y knock-out mice, a faithful model for myotubular myopathy (XLMTM). Analysis of historical data was used to generate a model for phenotype progression, which was then confirmed with phenotypic data from a new colony of mice derived via in vitro fertilization in an independent animal house, highlighting the reproducibility of disease phenotype in Mtm1-/y mice. This combined data was then used to refine the phenotypic parameters analyzed in these mice, and improve the model generated for expected disease progression. The disease progression model was then used to test therapeutic efficacy of Dnm2 targeting. Dnm2 reduction by antisense oligonucleotides blocked or postponed disease development, and resulted in a significant dose-dependent improvement outside the expected disease progression in untreated Mtm1-/y mice. This provides an example of optimizing disease analysis and testing therapeutic efficacy in a preclinical model, that can be applied by scientists testing therapeutic approaches using neuromuscular disease models in different laboratories.
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Affiliation(s)
| | | | | | | | | | - Jocelyn Laporte
- IGBMC, Inserm U1258, CNRS UMR7104, Université de Strasbourg, Illkirch, France
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13
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Xu X, Guan R, Gong K, Xie H, Shi L. Circ_FURIN knockdown assuages Testosterone-induced human ovarian granulosa-like tumor cell disorders by sponging miR-423-5p to reduce MTM1 expression in polycystic ovary syndrome. Reprod Biol Endocrinol 2022; 20:32. [PMID: 35177076 PMCID: PMC8851856 DOI: 10.1186/s12958-022-00891-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/21/2021] [Accepted: 01/13/2022] [Indexed: 01/20/2023] Open
Abstract
BACKGROUND Polycystic ovary syndrome (PCOS) is a common endocrine disorder among reproductive-age women. The mechanism by which circular RNA (circRNA) drives PCOS development remains unclear. Thus, the study is designed to explore the role of a novel circRNA, circ_FURIN, in the PCOS cell model and the underlying mechanism. METHODS PCOS cell model was established by treating human ovarian granulosa-like tumor cells (KGN) with Testosterone (TTR). RNA expressions of circ_FURIN, microRNA-423-5p (miR-423-5p) and myotubularin 1 (MTM1) were detected by quantitative real-time polymerase chain reaction (qRT-PCR). Protein expression was checked by Western blot. Cell proliferation was investigated by a 5-Ethynyl-29-deoxyuridine assay, 3-(4,5-Dimethylthazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and flow cytometry analysis for cell cycle. Apoptotic cells were quantified by flow cytometry analysis for cell apoptosis. The interplay between miR-423-5p and circ_FURIN or MTM1 was identified by dual-luciferase reporter and RNA pull-down assays. RESULTS Circ_FURIN and MTM1 expressions were significantly upregulated, whereas miR-423-5p was downregulated in the ovarian cortex tissues of PCOS patients and TTR-treated KGN cells compared with controls. Circ_FURIN depletion relieved TTR-induced proliferation inhibition and apoptosis promotion. Besides, knockdown of miR-423-5p, a target miRNA of circ_FURIN, rescued circ_FURIN knockdown-mediated effects under TTR treatment. MiR-423-5p remitted TTR-induced cell disorders by binding to MTM1. Moreover, circ_FURIN modulated MTM1 expression through miR-423-5p. CONCLUSION Circ_FURIN silencing protected against TTR-induced dysfunction by the miR-423-5p/MTM1 pathway in human ovarian granulosa-like tumor cells.
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Affiliation(s)
- Xia Xu
- Department of Obstetrical, The Hospital of Bayannaoer, Bayannaoer City, Inner Mongolia, China
| | - Rui Guan
- Department of Gynaecology, The Hospital of Bayannaoer, Bayannaoer City, Inner Mongolia, China
| | - Ke Gong
- Department of Obstetrical, The Hospital of Bayannaoer, Bayannaoer City, Inner Mongolia, China
| | - Huaibing Xie
- Department of Oncology, Huai'an Second People's Hospital, Affiliated to Xuzhou Medical University, Qingjiangpu District, Huai'an City, No.62, Huaihai South Road, 223001, Jiangsu Province, China.
| | - Lei Shi
- Department of Obstetrics and Gynecology, Hongze Huai'an District People's Hospital, Hongze District, Huai'an City, No.102 Dongfeng Road, 223001, Jiangsu Province, China.
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14
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Lawlor MW, Dowling JJ. X-linked myotubular myopathy. Neuromuscul Disord 2021; 31:1004-1012. [PMID: 34736623 DOI: 10.1016/j.nmd.2021.08.003] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 07/23/2021] [Accepted: 08/05/2021] [Indexed: 12/28/2022]
Abstract
X-linked myotubular myopathy (XLMTM) is a severe congenital muscle disease caused by mutation in the MTM1 gene. MTM1 encodes myotubularin (MTM1), an endosomal phosphatase that acts to dephosphorylate key second messenger lipids PI3P and PI3,5P2. XLMTM is clinically characterized by profound muscle weakness and associated with multiple disabilities (including ventilator and wheelchair dependence) and early death in most affected individuals. The disease is classically defined by characteristic changes observed on muscle biopsy, including centrally located nuclei, myofiber hypotrophy, and organelle disorganization. In this review, we highlight the clinical and pathologic features of the disease, present concepts related to disease pathomechanisms, and present recent advances in therapy development.
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Affiliation(s)
- Michael W Lawlor
- Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, WI, USA
| | - James J Dowling
- Division of Neurology and Program for Genetics and Genome Biology, Hospital for Sick Children, 555 University Ave., Toronto, ON M5G 1X8, Canada; Departments of Paediatrics and Molecular Genetics, University of Toronto, Canada.
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15
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Gómez-Oca R, Cowling BS, Laporte J. Common Pathogenic Mechanisms in Centronuclear and Myotubular Myopathies and Latest Treatment Advances. Int J Mol Sci 2021; 22:11377. [PMID: 34768808 PMCID: PMC8583656 DOI: 10.3390/ijms222111377] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 10/18/2021] [Indexed: 01/18/2023] Open
Abstract
Centronuclear myopathies (CNM) are rare congenital disorders characterized by muscle weakness and structural defects including fiber hypotrophy and organelle mispositioning. The main CNM forms are caused by mutations in: the MTM1 gene encoding the phosphoinositide phosphatase myotubularin (myotubular myopathy), the DNM2 gene encoding the mechanoenzyme dynamin 2, the BIN1 gene encoding the membrane curvature sensing amphiphysin 2, and the RYR1 gene encoding the skeletal muscle calcium release channel/ryanodine receptor. MTM1, BIN1, and DNM2 proteins are involved in membrane remodeling and trafficking, while RyR1 directly regulates excitation-contraction coupling (ECC). Several CNM animal models have been generated or identified, which confirm shared pathological anomalies in T-tubule remodeling, ECC, organelle mispositioning, protein homeostasis, neuromuscular junction, and muscle regeneration. Dynamin 2 plays a crucial role in CNM physiopathology and has been validated as a common therapeutic target for three CNM forms. Indeed, the promising results in preclinical models set up the basis for ongoing clinical trials. Another two clinical trials to treat myotubular myopathy by MTM1 gene therapy or tamoxifen repurposing are also ongoing. Here, we review the contribution of the different CNM models to understanding physiopathology and therapy development with a focus on the commonly dysregulated pathways and current therapeutic targets.
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Affiliation(s)
- Raquel Gómez-Oca
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), 67400 Illkirch, France;
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, 67400 Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, 67400 Illkirch, France
- Strasbourg University, 67081 Strasbourg, France
- Dynacure, 67400 Illkirch, France;
| | | | - Jocelyn Laporte
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), 67400 Illkirch, France;
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, 67400 Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, 67400 Illkirch, France
- Strasbourg University, 67081 Strasbourg, France
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16
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Franco-Romero A, Sandri M. Role of autophagy in muscle disease. Mol Aspects Med 2021; 82:101041. [PMID: 34625292 DOI: 10.1016/j.mam.2021.101041] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 09/24/2021] [Accepted: 09/27/2021] [Indexed: 02/08/2023]
Abstract
Beside inherited muscle diseases many catabolic conditions such as insulin resistance, malnutrition, cancer growth, aging, infections, chronic inflammatory status, inactivity, obesity are characterized by loss of muscle mass, strength and function. The decrease of muscle quality and quantity increases morbidity, mortality and has a major impact on the quality of life. One of the pathogenetic mechanisms of muscle wasting is the dysregulation of the main protein and organelles quality control system of the cell: the autophagy-lysosome. This review will focus on the role of the autophagy-lysosome system in the different conditions of muscle loss. We will also dissect the signalling pathways that are involved in excessive or defective autophagy regulation. Finally, the state of the art of autophagy modulators that have been used in preclinical or clinical studies to ameliorate muscle mass will be also described.
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Affiliation(s)
- Anais Franco-Romero
- Venetian Institute of Molecular Medicine, via Orus 2, 35129, Padova, Italy; Department of Biomedical Science, University of Padova, via G. Colombo 3, 35100, Padova, Italy
| | - Marco Sandri
- Venetian Institute of Molecular Medicine, via Orus 2, 35129, Padova, Italy; Department of Biomedical Science, University of Padova, via G. Colombo 3, 35100, Padova, Italy; Myology Center, University of Padova, via G. Colombo 3, 35100, Padova, Italy; Department of Medicine, McGill University, Montreal, Canada.
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17
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Djeddi S, Reiss D, Menuet A, Freismuth S, de Carvalho Neves J, Djerroud S, Massana-Muñoz X, Sosson AS, Kretz C, Raffelsberger W, Keime C, Dorchies OM, Thompson J, Laporte J. Multi-omics comparisons of different forms of centronuclear myopathies and the effects of several therapeutic strategies. Mol Ther 2021; 29:2514-2534. [PMID: 33940157 DOI: 10.1016/j.ymthe.2021.04.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2021] [Revised: 04/09/2021] [Accepted: 04/27/2021] [Indexed: 12/25/2022] Open
Abstract
Omics analyses are powerful methods to obtain an integrated view of complex biological processes, disease progression, or therapy efficiency. However, few studies have compared different disease forms and different therapy strategies to define the common molecular signatures representing the most significant implicated pathways. In this study, we used RNA sequencing and mass spectrometry to profile the transcriptomes and proteomes of mouse models for three forms of centronuclear myopathies (CNMs), untreated or treated with either a drug (tamoxifen), antisense oligonucleotides reducing the level of dynamin 2 (DNM2), or following modulation of DNM2 or amphiphysin 2 (BIN1) through genetic crosses. Unsupervised analysis and differential gene and protein expression were performed to retrieve CNM molecular signatures. Longitudinal studies before, at, and after disease onset highlighted potential disease causes and consequences. Main pathways in the common CNM disease signature include muscle contraction, regeneration and inflammation. The common therapy signature revealed novel potential therapeutic targets, including the calcium regulator sarcolipin. We identified several novel biomarkers validated in muscle and/or plasma through RNA quantification, western blotting, and enzyme-linked immunosorbent assay (ELISA) assays, including ANXA2 and IGFBP2. This study validates the concept of using multi-omics approaches to identify molecular signatures common to different disease forms and therapeutic strategies.
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Affiliation(s)
- Sarah Djeddi
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404 Illkirch, France
| | - David Reiss
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404 Illkirch, France
| | - Alexia Menuet
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404 Illkirch, France
| | - Sébastien Freismuth
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404 Illkirch, France
| | - Juliana de Carvalho Neves
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404 Illkirch, France
| | - Sarah Djerroud
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404 Illkirch, France
| | - Xènia Massana-Muñoz
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404 Illkirch, France
| | - Anne-Sophie Sosson
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404 Illkirch, France
| | - Christine Kretz
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404 Illkirch, France
| | - Wolfgang Raffelsberger
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404 Illkirch, France
| | - Céline Keime
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404 Illkirch, France
| | - Olivier M Dorchies
- Pharmaceutical Biochemistry, Institute of Pharmaceutical Sciences of Western Switzerland (ISPSO), University of Geneva, 1211 Geneva, Switzerland
| | - Julie Thompson
- Complex Systems and Translational Bioinformatics (CSTB), ICube Laboratory-CNRS, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg, 67000 Strasbourg, France
| | - Jocelyn Laporte
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), CNRS UMR7104, INSERM U1258, Université de Strasbourg, 67404 Illkirch, France.
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18
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Dietary nutrients and their control of the redox bioenergetic networks as therapeutics in redox dysfunctions sustained pathologies. Pharmacol Res 2021; 170:105709. [PMID: 34089868 DOI: 10.1016/j.phrs.2021.105709] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2021] [Revised: 05/12/2021] [Accepted: 05/31/2021] [Indexed: 02/06/2023]
Abstract
Electrons exchange amongst the chemical species in an organism is a pivotal concomitant activity carried out by individual cells for basic cellular processes and continuously contribute towards the maintenance of bioenergetic networks plus physiological attributes like cell growth, phenotypic differences and nutritional adaptations. Humans exchange matter and energy via complex connections of metabolic pathways (redox reactions) amongst cells being a thermodynamically open system. Usually, these reactions are the real lifeline and driving forces of health and disease in the living entity. Many shreds of evidence support the secondary role of reactive species in the cellular process of control apoptosis and proliferation. Disrupted redox mechanisms are seen in malaises, like degenerative and metabolic disorders, cancerous cells. This review targets the importance of redox reactions in the body's normal functioning and the effects of its alterations in cells to obtain a better understanding. Understanding the redox dynamics in a pathological state can provide an opportunity for cure or diagnosis at the earlier stage and serve as an essential biomarker to predict in advance to give personalized therapy. Understanding redox metabolism can also highlight the use of naturally available antioxidant in the form of diet.
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19
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Luo S, Li Q, Lin J, Murphy Q, Marty I, Zhang Y, Kazerounian S, Agrawal PB. SPEG binds with desmin and its deficiency causes defects in triad and focal adhesion proteins. Hum Mol Genet 2020; 29:3882-3891. [PMID: 33355670 DOI: 10.1093/hmg/ddaa276] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 11/17/2020] [Accepted: 12/09/2020] [Indexed: 11/13/2022] Open
Abstract
Striated preferentially expressed gene (SPEG), a member of the myosin light chain kinase family, is localized at the level of triad surrounding myofibrils in skeletal muscles. In humans, SPEG mutations are associated with centronuclear myopathy and cardiomyopathy. Using a striated muscle-specific Speg-knockout (KO) mouse model, we have previously shown that SPEG is critical for triad maintenance and calcium handling. Here, we further examined the molecular function of SPEG and characterized the effects of SPEG deficiency on triad and focal adhesion proteins. We used yeast two-hybrid assay, and identified desmin, an intermediate filament protein, to interact with SPEG and confirmed this interaction by co-immunoprecipitation. Using domain-mapping assay, we defined that Ig-like and fibronectin III domains of SPEG interact with rod domain of desmin. In skeletal muscles, SPEG depletion leads to desmin aggregates in vivo and a shift in desmin equilibrium from soluble to insoluble fraction. We also profiled the expression and localization of triadic proteins in Speg-KO mice using western blot and immunofluorescence. The amount of RyR1 and triadin were markedly reduced, whereas DHPRα1, SERCA1 and triadin were abnormally accumulated in discrete areas of Speg-KO myofibers. In addition, Speg-KO muscles exhibited internalized vinculin and β1 integrin, both of which are critical components of the focal adhesion complex. Further, β1 integrin was abnormally accumulated in early endosomes of Speg-KO myofibers. These results demonstrate that SPEG-deficient skeletal muscles exhibit several pathological features similar to those seen in MTM1 deficiency. Defects of shared cellular pathways may underlie these structural and functional abnormalities in both types of diseases.
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Affiliation(s)
- Shiyu Luo
- Division of Newborn Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.,Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.,The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Qifei Li
- Division of Newborn Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.,Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.,The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Jasmine Lin
- Division of Newborn Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.,Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.,The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Quinn Murphy
- Division of Newborn Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.,Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.,The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Isabelle Marty
- Grenoble Institut Neurosciences, Inserm, U1216, University Grenoble Alpes, 38000 Grenoble, France
| | - Yuanfan Zhang
- Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Shideh Kazerounian
- Division of Newborn Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.,Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.,The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
| | - Pankaj B Agrawal
- Division of Newborn Medicine, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.,Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA.,The Manton Center for Orphan Disease Research, Boston Children's Hospital, Harvard Medical School, Boston, MA 02115, USA
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20
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Mendell JR, Al-Zaidy SA, Rodino-Klapac LR, Goodspeed K, Gray SJ, Kay CN, Boye SL, Boye SE, George LA, Salabarria S, Corti M, Byrne BJ, Tremblay JP. Current Clinical Applications of In Vivo Gene Therapy with AAVs. Mol Ther 2020; 29:464-488. [PMID: 33309881 PMCID: PMC7854298 DOI: 10.1016/j.ymthe.2020.12.007] [Citation(s) in RCA: 351] [Impact Index Per Article: 87.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 11/16/2020] [Accepted: 12/05/2020] [Indexed: 02/07/2023] Open
Abstract
Hereditary diseases are caused by mutations in genes, and more than 7,000 rare diseases affect over 30 million Americans. For more than 30 years, hundreds of researchers have maintained that genetic modifications would provide effective treatments for many inherited human diseases, offering durable and possibly curative clinical benefit with a single treatment. This review is limited to gene therapy using adeno-associated virus (AAV) because the gene delivered by this vector does not integrate into the patient genome and has a low immunogenicity. There are now five treatments approved for commercialization and currently available, i.e., Luxturna, Zolgensma, the two chimeric antigen receptor T cell (CAR-T) therapies (Yescarta and Kymriah), and Strimvelis (the gammaretrovirus approved for adenosine deaminase-severe combined immunodeficiency [ADA-SCID] in Europe). Dozens of other treatments are under clinical trials. The review article presents a broad overview of the field of therapy by in vivo gene transfer. We review gene therapy for neuromuscular disorders (spinal muscular atrophy [SMA]; Duchenne muscular dystrophy [DMD]; X-linked myotubular myopathy [XLMTM]; and diseases of the central nervous system, including Alzheimer’s disease, Parkinson’s disease, Canavan disease, aromatic l-amino acid decarboxylase [AADC] deficiency, and giant axonal neuropathy), ocular disorders (Leber congenital amaurosis, age-related macular degeneration [AMD], choroideremia, achromatopsia, retinitis pigmentosa, and X-linked retinoschisis), the bleeding disorder hemophilia, and lysosomal storage disorders.
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Affiliation(s)
- Jerry R Mendell
- Center of Gene Therapy, Abigail Wexner Research Institute, Nationwide Children's Hospital, Columbus, OH, USA; Department of Pediatrics and Neurology, The Ohio State University, Columbus, OH, USA
| | | | | | - Kimberly Goodspeed
- Department of Pediatrics, UT Southwestern Medical Center, Dallas, TX, USA
| | - Steven J Gray
- Department of Pediatrics, UT Southwestern Medical Center, Dallas, TX, USA
| | | | - Sanford L Boye
- Department of Pediatrics, Powell Gene Therapy Center, University of Florida, Gainesville, FL, USA
| | - Shannon E Boye
- Division of Cellular and Molecular Therapeutics, University of Florida, Gainesville, FL, USA
| | - Lindsey A George
- Division of Hematology and the Perelman Center for Cellular and Molecular Therapeutics, Philadelphia, PA, USA; Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Stephanie Salabarria
- Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Manuela Corti
- Department of Pediatrics, College of Medicine, University of Florida, Gainesville, FL, USA; Powell Gene Therapy Center, University of Florida, Gainesville, FL, USA
| | - Barry J Byrne
- Department of Pediatrics, College of Medicine, University of Florida, Gainesville, FL, USA; Powell Gene Therapy Center, University of Florida, Gainesville, FL, USA
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21
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Buscara L, Gross DA, Daniele N. Of rAAV and Men: From Genetic Neuromuscular Disorder Efficacy and Toxicity Preclinical Studies to Clinical Trials and Back. J Pers Med 2020; 10:E258. [PMID: 33260623 PMCID: PMC7768510 DOI: 10.3390/jpm10040258] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2020] [Revised: 11/20/2020] [Accepted: 11/23/2020] [Indexed: 12/12/2022] Open
Abstract
Neuromuscular disorders are a large group of rare pathologies characterised by skeletal muscle atrophy and weakness, with the common involvement of respiratory and/or cardiac muscles. These diseases lead to life-long motor deficiencies and specific organ failures, and are, in their worst-case scenarios, life threatening. Amongst other causes, they can be genetically inherited through mutations in more than 500 different genes. In the last 20 years, specific pharmacological treatments have been approved for human usage. However, these "à-la-carte" therapies cover only a very small portion of the clinical needs and are often partially efficient in alleviating the symptoms of the disease, even less so in curing it. Recombinant adeno-associated virus vector-mediated gene transfer is a more general strategy that could be adapted for a large majority of these diseases and has proved very efficient in rescuing the symptoms in many neuropathological animal models. On this solid ground, several clinical trials are currently being conducted with the whole-body delivery of the therapeutic vectors. This review recapitulates the state-of-the-art tools for neuron and muscle-targeted gene therapy, and summarises the main findings of the spinal muscular atrophy (SMA), Duchenne muscular dystrophy (DMD) and X-linked myotubular myopathy (XLMTM) trials. Despite promising efficacy results, serious adverse events of various severities were observed in these trials. Possible leads for second-generation products are also discussed.
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Affiliation(s)
| | - David-Alexandre Gross
- Genethon, 91000 Evry, France; (L.B.); (D.-A.G.)
- Université Paris-Saclay, Univ Evry, Inserm, Genethon, Integrare Research Unit UMR_S951, 91000 Evry, France
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22
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Sztretye M, Szabó L, Dobrosi N, Fodor J, Szentesi P, Almássy J, Magyar ZÉ, Dienes B, Csernoch L. From Mice to Humans: An Overview of the Potentials and Limitations of Current Transgenic Mouse Models of Major Muscular Dystrophies and Congenital Myopathies. Int J Mol Sci 2020; 21:ijms21238935. [PMID: 33255644 PMCID: PMC7728138 DOI: 10.3390/ijms21238935] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 11/19/2020] [Accepted: 11/20/2020] [Indexed: 12/24/2022] Open
Abstract
Muscular dystrophies are a group of more than 160 different human neuromuscular disorders characterized by a progressive deterioration of muscle mass and strength. The causes, symptoms, age of onset, severity, and progression vary depending on the exact time point of diagnosis and the entity. Congenital myopathies are rare muscle diseases mostly present at birth that result from genetic defects. There are no known cures for congenital myopathies; however, recent advances in gene therapy are promising tools in providing treatment. This review gives an overview of the mouse models used to investigate the most common muscular dystrophies and congenital myopathies with emphasis on their potentials and limitations in respect to human applications.
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23
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Ross JA, Tasfaout H, Levy Y, Morgan J, Cowling BS, Laporte J, Zanoteli E, Romero NB, Lowe DA, Jungbluth H, Lawlor MW, Mack DL, Ochala J. rAAV-related therapy fully rescues myonuclear and myofilament function in X-linked myotubular myopathy. Acta Neuropathol Commun 2020; 8:167. [PMID: 33076971 PMCID: PMC7574461 DOI: 10.1186/s40478-020-01048-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Accepted: 10/02/2020] [Indexed: 01/17/2023] Open
Abstract
X-linked myotubular myopathy (XLMTM) is a life-threatening skeletal muscle disease caused by mutations in the MTM1 gene. XLMTM fibres display a population of nuclei mispositioned in the centre. In the present study, we aimed to explore whether positioning and overall distribution of nuclei affects cellular organization and contractile function, thereby contributing to muscle weakness in this disease. We also assessed whether gene therapy alters nuclear arrangement and function. We used tissue from human patients and animal models, including XLMTM dogs that had received increasing doses of recombinant AAV8 vector restoring MTM1 expression (rAAV8-cMTM1). We then used single isolated muscle fibres to analyze nuclear organization and contractile function. In addition to the expected mislocalization of nuclei in the centre of muscle fibres, a novel form of nuclear mispositioning was observed: irregular spacing between those located at the fibre periphery, and an overall increased number of nuclei, leading to dramatically smaller and inconsistent myonuclear domains. Nuclear mislocalization was associated with decreases in global nuclear synthetic activity, contractile protein content and intrinsic myofilament force production. A contractile deficit originating at the myofilaments, rather than mechanical interference by centrally positioned nuclei, was supported by experiments in regenerated mouse muscle. Systemic administration of rAAV8-cMTM1 at doses higher than 2.5 × 1013 vg kg−1 allowed a full rescue of all these cellular defects in XLMTM dogs. Altogether, these findings identify previously unrecognized pathological mechanisms in human and animal XLMTM, associated with myonuclear defects and contractile filament function. These defects can be reversed by gene therapy restoring MTM1 expression in dogs with XLMTM.
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24
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Koch C, Buono S, Menuet A, Robé A, Djeddi S, Kretz C, Gomez-Oca R, Depla M, Monseur A, Thielemans L, Servais L, Laporte J, Cowling BS. Myostatin: a Circulating Biomarker Correlating with Disease in Myotubular Myopathy Mice and Patients. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2020; 17:1178-1189. [PMID: 32514412 PMCID: PMC7267729 DOI: 10.1016/j.omtm.2020.04.022] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Accepted: 04/27/2020] [Indexed: 12/18/2022]
Abstract
Myotubular myopathy, also called X-linked centronuclear myopathy (XL-CNM), is a severe congenital disease targeted for therapeutic trials. To date, biomarkers to monitor disease progression and therapy efficacy are lacking. The Mtm1 -/y mouse is a faithful model for XL-CNM, due to myotubularin 1 (MTM1) loss-of-function mutations. Using both an unbiased approach (RNA sequencing [RNA-seq]) and a directed approach (qRT-PCR and protein level), we identified decreased Mstn levels in Mtm1 -/y muscle, leading to low levels of myostatin in muscle and plasma. Myostatin (Mstn or growth differentiation factor 8 [Gdf8]) is a protein released by myocytes and inhibiting muscle growth and differentiation. Decreasing Dnm2 by genetic cross with Dnm2 +/- mice or by antisense oligonucleotides blocked or postponed disease progression and resulted in an increase in circulating myostatin. In addition, plasma myostatin levels inversely correlated with disease severity and with Dnm2 mRNA levels in muscles. Altered Mstn levels were associated with a generalized disruption of the myostatin pathway. Importantly, in two different forms of CNMs we identified reduced circulating myostatin levels in plasma from patients. This provides evidence of a blood-based biomarker that may be used to monitor disease state in XL-CNM mice and patients and supports monitoring circulating myostatin during clinical trials for myotubular myopathy.
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Affiliation(s)
| | | | - Alexia Menuet
- Dynacure, Illkirch, France.,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
| | | | - Sarah Djeddi
- 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
| | - Christine Kretz
- 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
| | - Raquel Gomez-Oca
- Dynacure, Illkirch, France.,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
| | | | | | | | - Laurent Servais
- Hopital Armand Trousseau, Institute I-Motion, Institute of Myology, Paris, France.,MDUK Neuromuscular Center, Department of Paediatrics, University of Oxford, Oxford, UK.,Division of Child Neurology, Centre de Références des Maladies Neuromusculaires, Department of Pediatrics, University Hospital Liège & University of Liège, 4000 Liège, Belgium
| | | | - 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
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25
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Chen X, Gao YQ, Zheng YY, Wang W, Wang P, Liang J, Zhao W, Tao T, Sun J, Wei L, Li Y, Zhou Y, Gan Z, Zhang X, Chen HQ, Zhu MS. The intragenic microRNA miR199A1 in the dynamin 2 gene contributes to the pathology of X-linked centronuclear myopathy. J Biol Chem 2020; 295:8656-8667. [PMID: 32354746 DOI: 10.1074/jbc.ra119.010839] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 04/29/2020] [Indexed: 12/23/2022] Open
Abstract
Mutations in the myotubularin 1 (MTM1) gene can cause the fatal disease X-linked centronuclear myopathy (XLCNM), but the underlying mechanism is incompletely understood. In this report, using an Mtm1 -/y disease model, we found that expression of the intragenic microRNA miR-199a-1 is up-regulated along with that of its host gene, dynamin 2 (Dnm2), in XLCNM skeletal muscle. To assess the role of miR-199a-1 in XLCNM, we crossed miR-199a-1 -/- with Mtm1 -/y mice and found that the resultant miR-199a-1-Mtm1 double-knockout mice display markers of improved health, as evidenced by lifespans prolonged by 30% and improved muscle strength and histology. Mechanistic analyses showed that miR-199a-1 directly targets nonmuscle myosin IIA (NM IIA) expression and, hence, inhibits muscle postnatal development as well as muscle maturation. Further analysis revealed that increased expression and phosphorylation of signal transducer and activator of transcription 3 (STAT3) up-regulates Dnm2/miR-199a-1 expression in XLCNM muscle. Our results suggest that miR-199a-1 has a critical role in XLCNM pathology and imply that this microRNA could be targeted in therapies to manage XLCNM.
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Affiliation(s)
- Xin Chen
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study and the Medical School, Nanjing University, Nanjing, China
| | - Yun-Qian Gao
- Obstetrics and Gynecology Hospital, State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development at the School of Life Sciences of Fudan University, Shanghai, China; Institute of Biomedical Sciences, Shanghai Medical College, Fudan University, Shanghai, China
| | - Yan-Yan Zheng
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study and the Medical School, Nanjing University, Nanjing, China
| | - Wei Wang
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study and the Medical School, Nanjing University, Nanjing, China
| | - Pei Wang
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study and the Medical School, Nanjing University, Nanjing, China
| | - Juan Liang
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study and the Medical School, Nanjing University, Nanjing, China
| | - Wei Zhao
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study and the Medical School, Nanjing University, Nanjing, China
| | - Tao Tao
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study and the Medical School, Nanjing University, Nanjing, China
| | - Jie Sun
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study and the Medical School, Nanjing University, Nanjing, China
| | - Lisha Wei
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study and the Medical School, Nanjing University, Nanjing, China
| | - Yeqiong Li
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study and the Medical School, Nanjing University, Nanjing, China
| | - Yuwei Zhou
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study and the Medical School, Nanjing University, Nanjing, China
| | - Zhenji Gan
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study and the Medical School, Nanjing University, Nanjing, China
| | - Xuena Zhang
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study and the Medical School, Nanjing University, Nanjing, China.
| | - Hua-Qun Chen
- College of Life Science, Nanjing Normal University, Nanjing, China.
| | - Min-Sheng Zhu
- State Key Laboratory of Pharmaceutical Biotechnology, Model Animal Research Center, Ministry of Education (MOE) Key Laboratory of Model Animal for Disease Study and the Medical School, Nanjing University, Nanjing, China.
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26
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A mutation in MTM1 causes X-Linked myotubular myopathy in Boykin spaniels. Neuromuscul Disord 2020; 30:353-359. [PMID: 32417001 DOI: 10.1016/j.nmd.2020.02.021] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2019] [Revised: 02/18/2020] [Accepted: 02/28/2020] [Indexed: 12/30/2022]
Abstract
The purpose of this study was to report the findings of clinical and genetic evaluation of a 3-month old male Boykin spaniel (the proband) that presented with progressive weakness. The puppy underwent a physical and neurological examination, serum biochemistry and complete blood cell count, electrophysiological testing, muscle biopsy and whole genome sequencing. Clinical evaluation revealed generalized neuromuscular weakness with tetraparesis and difficulty holding the head up and a dropped jaw. There was diffuse spontaneous activity on electromyography, most severe in the cervical musculature. Nerve conduction studies were normal, the findings were interpreted as consistent with a myopathy. Skeletal muscle was grossly abnormal on biopsy and there were necklace fibers and abnormal triad structure localization on histopathology, consistent with myotubular myopathy. Whole genome sequencing revealed a premature stop codon in exon 13 of MTM1 (ChrX: 118,903,496 C > T, c.1467C>T, p.Arg512X). The puppy was humanely euthanized at 5 months of age. The puppy's dam was heterozygous for the variant, and 3 male puppies from a subsequent litter all of which died by 2 weeks of age were hemizygous for the variant. This naturally occurring mutation in Boykin spaniels causes a severe form of X-linked myotubular myopathy, comparable to the human counterpart.
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27
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Granger N, Luján Feliu-Pascual A, Spicer C, Ricketts S, Hitti R, Forman O, Hersheson J, Houlden H. Charcot-Marie-Tooth type 4B2 demyelinating neuropathy in miniature Schnauzer dogs caused by a novel splicing SBF2 (MTMR13) genetic variant: a new spontaneous clinical model. PeerJ 2019; 7:e7983. [PMID: 31772832 PMCID: PMC6875392 DOI: 10.7717/peerj.7983] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2019] [Accepted: 10/02/2019] [Indexed: 01/23/2023] Open
Abstract
Background Charcot-Marie-Tooth (CMT) disease is the most common neuromuscular disorder in humans affecting 40 out of 100,000 individuals. In 2008, we described the clinical, electrophysiological and pathological findings of a demyelinating motor and sensory neuropathy in Miniature Schnauzer dogs, with a suspected autosomal recessive mode of inheritance based on pedigree analysis. The discovery of additional cases has followed this work and led to a genome-wide association mapping approach to search for the underlying genetic cause of the disease. Methods For genome wide association screening, genomic DNA samples from affected and unaffected dogs were genotyped using the Illumina CanineHD SNP genotyping array. SBF2 and its variant were sequenced using primers and PCRs. RNA was extracted from muscle of an unaffected and an affected dog and RT-PCR performed. Immunohistochemistry for myelin basic protein was performed on peripheral nerve section specimens. Results The genome-wide association study gave an indicative signal on canine chromosome 21. Although the signal was not of genome-wide significance due to the small number of cases, the SBF2 (also known as MTMR13) gene within the region of shared case homozygosity was a strong positional candidate, as 22 genetic variants in the gene have been associated with demyelinating forms of Charcot-Marie-Tooth disease in humans. Sequencing of SBF2 in cases revealed a splice donor site genetic variant, resulting in cryptic splicing and predicted early termination of the protein based on RNA sequencing results. Conclusions This study reports the first genetic variant in Miniature Schnauzer dogs responsible for the occurrence of a demyelinating peripheral neuropathy with abnormally folded myelin. This discovery establishes a genotype/phenotype correlation in affected Miniature Schnauzers that can be used for the diagnosis of these dogs. It further supports the dog as a natural model of a human disease; in this instance, Charcot-Marie-Tooth disease. It opens avenues to search the biological mechanisms responsible for the disease and to test new therapies in a non-rodent large animal model. In particular, recent gene editing methods that led to the restoration of dystrophin expression in a canine model of muscular dystrophy could be applied to other canine models such as this before translation to humans.
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Affiliation(s)
- Nicolas Granger
- Royal Veterinary College, University of London, Hatfield, United Kingdom.,Bristol Veterinary Specialists, CVS Referrals, Bristol, United Kingdom
| | | | - Charlotte Spicer
- Department of Molecular Neuroscience, UCL Institute of Neurology & National Hospital for Neurology and Neurosurgery & London, London, United Kingdom
| | - Sally Ricketts
- Kennel Club Genetics Centre, Animal Health Trust, Newmarket, United Kingdom
| | - Rebekkah Hitti
- Kennel Club Genetics Centre, Animal Health Trust, Newmarket, United Kingdom
| | - Oliver Forman
- Kennel Club Genetics Centre, Animal Health Trust, Newmarket, United Kingdom
| | - Joshua Hersheson
- Department of Molecular Neuroscience, UCL Institute of Neurology & National Hospital for Neurology and Neurosurgery & London, London, United Kingdom
| | - Henry Houlden
- Department of Molecular Neuroscience, UCL Institute of Neurology & National Hospital for Neurology and Neurosurgery & London, London, United Kingdom
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28
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Dupont JB, Guo J, Renaud-Gabardos E, Poulard K, Latournerie V, Lawlor MW, Grange RW, Gray JT, Buj-Bello A, Childers MK, Mack DL. AAV-Mediated Gene Transfer Restores a Normal Muscle Transcriptome in a Canine Model of X-Linked Myotubular Myopathy. Mol Ther 2019; 28:382-393. [PMID: 31784415 DOI: 10.1016/j.ymthe.2019.10.018] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2019] [Revised: 09/13/2019] [Accepted: 10/31/2019] [Indexed: 12/27/2022] Open
Abstract
Multiple clinical trials employing recombinant adeno-associated viral (rAAV) vectors have been initiated for neuromuscular disorders, including Duchenne and limb-girdle muscular dystrophies, spinal muscular atrophy, and recently X-linked myotubular myopathy (XLMTM). Our previous work on a canine model of XLMTM showed that a single rAAV8-cMTM1 systemic infusion corrected structural abnormalities within the muscle and restored contractile function, with affected dogs surviving more than 4 years post injection. This remarkable therapeutic efficacy presents a unique opportunity to identify the downstream molecular drivers of XLMTM pathology and to what extent the whole muscle transcriptome is restored to normal after gene transfer. Herein, RNA-sequencing was used to examine the transcriptomes of the Biceps femoris and Vastus lateralis in a previously described canine cohort that showed dose-dependent clinical improvements after rAAV8-cMTM1 gene transfer. Our analysis confirmed several dysregulated genes previously observed in XLMTM mice but also identified transcripts linked to XLMTM pathology. We demonstrated XLMTM transcriptome remodeling and dose-dependent normalization of gene expression after gene transfer and created metrics to pinpoint potential biomarkers of disease progression and correction.
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Affiliation(s)
- Jean-Baptiste Dupont
- Department of Rehabilitation Medicine, Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA
| | - Jianjun Guo
- Audentes Therapeutics, San Francisco, CA 94108, USA
| | - Edith Renaud-Gabardos
- Genethon, INSERM UMR S951, Université Evry Val-d'Essone, Université Paris-Saclay, 91000 Evry, France
| | - Karine Poulard
- Genethon, INSERM UMR S951, Université Evry Val-d'Essone, Université Paris-Saclay, 91000 Evry, France
| | - Virginie Latournerie
- Genethon, INSERM UMR S951, Université Evry Val-d'Essone, Université Paris-Saclay, 91000 Evry, France
| | - Michael W Lawlor
- Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, WI 53226, USA
| | - Robert W Grange
- Department of Human Nutrition, Foods, and Exercise, Virginia Polytechnic Institute and State University, Blacksburg, VA 24060, USA
| | - John T Gray
- Audentes Therapeutics, San Francisco, CA 94108, USA
| | - Ana Buj-Bello
- Genethon, INSERM UMR S951, Université Evry Val-d'Essone, Université Paris-Saclay, 91000 Evry, France
| | - Martin K Childers
- Department of Rehabilitation Medicine, Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA
| | - David L Mack
- Department of Rehabilitation Medicine, Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA; Department of Bioengineering, University of Washington, Seattle, WA 98109, USA.
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29
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Volpatti JR, Al-Maawali A, Smith L, Al-Hashim A, Brill JA, Dowling JJ. The expanding spectrum of neurological disorders of phosphoinositide metabolism. Dis Model Mech 2019; 12:12/8/dmm038174. [PMID: 31413155 PMCID: PMC6737944 DOI: 10.1242/dmm.038174] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Phosphoinositides (PIPs) are a ubiquitous group of seven low-abundance phospholipids that play a crucial role in defining localized membrane properties and that regulate myriad cellular processes, including cytoskeletal remodeling, cell signaling cascades, ion channel activity and membrane traffic. PIP homeostasis is tightly regulated by numerous inositol kinases and phosphatases, which phosphorylate and dephosphorylate distinct PIP species. The importance of these phospholipids, and of the enzymes that regulate them, is increasingly being recognized, with the identification of human neurological disorders that are caused by mutations in PIP-modulating enzymes. Genetic disorders of PIP metabolism include forms of epilepsy, neurodegenerative disease, brain malformation syndromes, peripheral neuropathy and congenital myopathy. In this Review, we provide an overview of PIP function and regulation, delineate the disorders associated with mutations in genes that modulate or utilize PIPs, and discuss what is understood about gene function and disease pathogenesis as established through animal models of these diseases. Summary: This Review highlights the intersection between phosphoinositides and the enzymes that regulate their metabolism, which together are crucial regulators of myriad cellular processes and neurological disorders.
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Affiliation(s)
- Jonathan R Volpatti
- Division of Neurology and Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON M5G 0A4, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Almundher Al-Maawali
- Division of Neurology and Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON M5G 0A4, Canada.,Department of Genetics, College of Medicine and Health Sciences, Sultan Qaboos University, Muscat 123, Oman
| | - Lindsay Smith
- Division of Neurology and Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON M5G 0A4, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada
| | - Aqeela Al-Hashim
- Division of Neurology and Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON M5G 0A4, Canada.,Department of Neuroscience, King Fahad Medical City, Riyadh 11525, Saudi Arabia
| | - Julie A Brill
- Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada.,Program in Cell Biology, The Hospital for Sick Children, Toronto, ON M5G 0A4, Canada
| | - James J Dowling
- Division of Neurology and Program in Genetics and Genome Biology, The Hospital for Sick Children, Toronto, ON M5G 0A4, Canada .,Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada
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30
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Ca 2+-induced sarcoplasmic reticulum Ca 2+ release in myotubularin-deficient muscle fibers. Cell Calcium 2019; 80:91-100. [PMID: 30999217 DOI: 10.1016/j.ceca.2019.04.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/27/2019] [Accepted: 04/08/2019] [Indexed: 11/23/2022]
Abstract
Skeletal muscle deficiency in the 3-phosphoinositide (PtdInsP) phosphatase myotubularin (MTM1) causes myotubular myopathy which is associated with severe depression of voltage-activated sarcoplasmic reticulum Ca2+ release through ryanodine receptors. In the present study we aimed at further understanding how Ca2+ release is altered in MTM1-deficient muscle fibers, at rest and during activation. While in wild-type muscle fibers, SR Ca2+ release exhibits fast stereotyped kinetics of activation and decay throughout the voltage range of activation, Ca2+ release in MTM1-deficient muscle fibers exhibits slow and unconventional kinetics at intermediate voltages, suggestive of partial loss of the normal control of ryanodine receptor Ca2+ channel activity. In addition, the diseased muscle fibers at rest exhibit spontaneous elementary Ca2+ release events at a frequency 30 times greater than that of control fibers. Eighty percent of the events have spatiotemporal properties of archetypal Ca2+ sparks while the rest take either the form of lower amplitude, longer duration Ca2+ release events or of a combination thereof. The events occur at preferred locations in the fibers, indicating spatially uneven distribution of the parameters determining spontaneous ryanodine receptor 1 opening. Spatially large Ca2+ release sources were obviously involved in some of these events, suggesting that opening of ryanodine receptors in one cluster can activate opening of ryanodine receptors in a neighboring one. Overall results demonstrate that opening of Ca2+-activated ryanodine receptors is promoted both at rest and during excitation-contraction coupling in MTM1-deficient muscle fibers. Because access to this activation mode is denied to ryanodine receptors in healthy skeletal muscle, this may play an important role in the associated disease situation.
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31
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Lionello VM, Nicot AS, Sartori M, Kretz C, Kessler P, Buono S, Djerroud S, Messaddeq N, Koebel P, Prokic I, Hérault Y, Romero NB, Laporte J, Cowling BS. Amphiphysin 2 modulation rescues myotubular myopathy and prevents focal adhesion defects in mice. Sci Transl Med 2019; 11:11/484/eaav1866. [DOI: 10.1126/scitranslmed.aav1866] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 11/14/2018] [Accepted: 02/28/2019] [Indexed: 12/13/2022]
Abstract
Centronuclear myopathies (CNMs) are severe diseases characterized by muscle weakness and myofiber atrophy. Currently, there are no approved treatments for these disorders. Mutations in the phosphoinositide 3-phosphatase myotubularin (MTM1) are responsible for X-linked CNM (XLCNM), also called myotubular myopathy, whereas mutations in the membrane remodeling Bin/amphiphysin/Rvs protein amphiphysin 2 [bridging integrator 1 (BIN1)] are responsible for an autosomal form of the disease. Here, we investigated the functional relationship between MTM1 and BIN1 in healthy skeletal muscle and in the physiopathology of CNM. Genetic overexpression of human BIN1 efficiently rescued the muscle weakness and life span in a mouse model of XLCNM. Exogenous human BIN1 expression with adeno-associated virus after birth also prevented the progression of the disease, suggesting that human BIN1 overexpression can compensate for the lack of MTM1 expression in this mouse model. Our results showed that MTM1 controls cell adhesion and integrin localization in mammalian muscle. Alterations in this pathway in Mtm1−/y mice were associated with defects in myofiber shape and size. BIN1 expression rescued integrin and laminin alterations and restored myofiber integrity, supporting the idea that MTM1 and BIN1 are functionally linked and necessary for focal adhesions in skeletal muscle. The results suggest that BIN1 modulation might be an effective strategy for treating XLCNM.
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32
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Nishikawa A, Iida A, Hayashi S, Okubo M, Oya Y, Yamanaka G, Takahashi I, Nonaka I, Noguchi S, Nishino I. Three novel MTM1 pathogenic variants identified in Japanese patients with X-linked myotubular myopathy. Mol Genet Genomic Med 2019; 7:e621. [PMID: 30884204 PMCID: PMC6503166 DOI: 10.1002/mgg3.621] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2018] [Revised: 01/28/2019] [Accepted: 02/11/2019] [Indexed: 01/06/2023] Open
Abstract
Background X‐linked myotubular myopathy (XLMTM) is a form of the severest congenital muscle diseases characterized by marked muscle weakness, hypotonia, and feeding and breathing difficulties in male infants. It is caused by mutations in the myotubularin gene (MTM1). Methods Evaluation of clinical history and examination of muscle pathology of three patients and comprehensive genome analysis on our original targeted gene panel system for muscular diseases. Results We report three patients, each of whom presents distinct muscle pathological features. The three patients have novel hemizygous MTM1 variants, including c.527A>G (p.Gln176Arg), c.595C>G (p.Pro199Ala), or c.688T>C (p.Trp230Arg). Conclusions All variants were assessed as “Class 4 (likely pathogenic)” on the basis of the guideline of American College of Medical Genetics and Genomics. These distinct pathological features among the patients with variants in the second cluster of PTP domain in MTM1 provides an insight into microheterogeneities in disease phenotypes in XLMTM.
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Affiliation(s)
- Atsuko Nishikawa
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Aritoshi Iida
- Department of Clinical Genome Analysis, Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Shinichiro Hayashi
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Mariko Okubo
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Yasushi Oya
- Department of Neurology, National Center Hospital, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Gaku Yamanaka
- Department of Pediatrics, Tokyo Medical University Hospital, Tokyo, Japan
| | - Ikuko Takahashi
- Department of Pediatrics, Akita University, Faculty of Medicine, Akita, Japan
| | - Ikuya Nonaka
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Satoru Noguchi
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
| | - Ichizo Nishino
- Department of Neuromuscular Research, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan.,Department of Clinical Genome Analysis, Medical Genome Center, National Center of Neurology and Psychiatry, Tokyo, Japan
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33
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Tasfaout H, Cowling BS, Laporte J. Centronuclear myopathies under attack: A plethora of therapeutic targets. J Neuromuscul Dis 2019; 5:387-406. [PMID: 30103348 PMCID: PMC6218136 DOI: 10.3233/jnd-180309] [Citation(s) in RCA: 27] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Centronuclear myopathies are a group of congenital myopathies characterized by severe muscle weakness, genetic heterogeneity, and defects in the structural organization of muscle fibers. Their names are derived from the central position of nuclei on biopsies, while they are at the fiber periphery under normal conditions. No specific therapy exists yet for these debilitating diseases. Mutations in the myotubularin phosphoinositides phosphatase, the GTPase dynamin 2, or amphiphysin 2 have been identified to cause respectively X-linked centronuclear myopathies (also called myotubular myopathy) or autosomal dominant and recessive forms. Mutations in additional genes, as RYR1, TTN, SPEG or CACNA1S, were linked to phenotypes that can overlap with centronuclear myopathies. Numerous animal models of centronuclear myopathies have been studied over the last 15 years, ranging from invertebrate to large mammalian models. Their characterization led to a partial understanding of the pathomechanisms of these diseases and allowed the recent validation of therapeutic proof-of-concepts. Here, we review the different therapeutic strategies that have been tested so far for centronuclear myopathies, some of which may be translated to patients.
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Affiliation(s)
- Hichem Tasfaout
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
| | - Belinda S. Cowling
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
| | - Jocelyn Laporte
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, France
- Université de Strasbourg, Illkirch, France
- Correspondence to: Jocelyn Laporte, Tel.: 33 0 388653412; E-mail:
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34
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Maani N, Sabha N, Rezai K, Ramani A, Groom L, Eltayeb N, Mavandadnejad F, Pang A, Russo G, Brudno M, Haucke V, Dirksen RT, Dowling JJ. Tamoxifen therapy in a murine model of myotubular myopathy. Nat Commun 2018; 9:4849. [PMID: 30451841 PMCID: PMC6242823 DOI: 10.1038/s41467-018-07057-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Accepted: 10/12/2018] [Indexed: 02/07/2023] Open
Abstract
Myotubular myopathy (MTM) is a severe X-linked disease without existing therapies. Here, we show that tamoxifen ameliorates MTM-related histopathological and functional abnormalities in mice, and nearly doubles survival. The beneficial effects of tamoxifen are mediated primarily via estrogen receptor signaling, as demonstrated through in vitro studies and in vivo phenotypic rescue with estradiol. RNA sequencing and protein expression analyses revealed that rescue is mediated in part through post-transcriptional reduction of dynamin-2, a known MTM modifier. These findings demonstrate an unexpected ability of tamoxifen to improve the murine MTM phenotype, providing preclinical evidence to support clinical translation.
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MESH Headings
- Animals
- Disease Models, Animal
- Drug Evaluation, Preclinical
- Dynamin II/genetics
- Dynamin II/metabolism
- Estradiol/metabolism
- Estradiol/pharmacology
- Excitation Contraction Coupling/drug effects
- Female
- Gene Expression/drug effects
- High-Throughput Nucleotide Sequencing
- Humans
- Longevity/drug effects
- Male
- Mice
- Mice, Knockout
- Motor Activity/drug effects
- Muscle, Skeletal/drug effects
- Muscle, Skeletal/metabolism
- Muscle, Skeletal/pathology
- Myofibrils/drug effects
- Myofibrils/metabolism
- Myofibrils/ultrastructure
- Myopathies, Structural, Congenital/drug therapy
- Myopathies, Structural, Congenital/genetics
- Myopathies, Structural, Congenital/metabolism
- Myopathies, Structural, Congenital/pathology
- Protective Agents/pharmacology
- Protein Tyrosine Phosphatases, Non-Receptor/deficiency
- Protein Tyrosine Phosphatases, Non-Receptor/genetics
- Receptors, Estrogen/genetics
- Receptors, Estrogen/metabolism
- Tamoxifen/pharmacology
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Affiliation(s)
- Nika Maani
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, ON, CAN M5G 0A4, Canada
- Department of Molecular Genetics, University of Toronto, Medical Science Building, Room 4386, 1 King's College Cir, Toronto, ON, CAN M5S 1A8, Canada
| | - Nesrin Sabha
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, ON, CAN M5G 0A4, Canada
- Department of Molecular Genetics, University of Toronto, Medical Science Building, Room 4386, 1 King's College Cir, Toronto, ON, CAN M5S 1A8, Canada
- Department of Paediatrics, University of Toronto, Room 1436D, 555 University Avenue, Toronto, ON, CAN M5G 1X8, Canada
| | - Kamran Rezai
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, ON, CAN M5G 0A4, Canada
- Department of Molecular Genetics, University of Toronto, Medical Science Building, Room 4386, 1 King's College Cir, Toronto, ON, CAN M5S 1A8, Canada
| | - Arun Ramani
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, ON, CAN M5G 0A4, Canada
- Department of Computer Science, University of Toronto, Pratt Building Room 286C, 6 King's College Rd, Toronto, ON, CAN M5S 3G4, Canada
- Centre for Computational Medicine, The Hospital for Sick Children, 686 Bay Street, Toronto, ON, CAN M5G 0A4, Canada
| | - Linda Groom
- Department of Pharmacology and Physiology, University of Rochester Medical Center School of Medicine and Dentistry, 601 Elmwood Ave, Box 711, Rochester, NY, 14642, USA
| | - Nadine Eltayeb
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, ON, CAN M5G 0A4, Canada
| | - Faranak Mavandadnejad
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, ON, CAN M5G 0A4, Canada
| | - Andrea Pang
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, ON, CAN M5G 0A4, Canada
| | - Giulia Russo
- Department of Molecular Pharmacology and Cell Biology, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125, Berlin, Germany
| | - Michael Brudno
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, ON, CAN M5G 0A4, Canada
- Department of Computer Science, University of Toronto, Pratt Building Room 286C, 6 King's College Rd, Toronto, ON, CAN M5S 3G4, Canada
- Centre for Computational Medicine, The Hospital for Sick Children, 686 Bay Street, Toronto, ON, CAN M5G 0A4, Canada
| | - Volker Haucke
- Department of Molecular Pharmacology and Cell Biology, Leibniz-Forschungsinstitut für Molekulare Pharmakologie (FMP), 13125, Berlin, Germany
| | - Robert T Dirksen
- Department of Pharmacology and Physiology, University of Rochester Medical Center School of Medicine and Dentistry, 601 Elmwood Ave, Box 711, Rochester, NY, 14642, USA
| | - James J Dowling
- Program for Genetics and Genome Biology, Hospital for Sick Children, 686 Bay Street, Toronto, ON, CAN M5G 0A4, Canada.
- Department of Molecular Genetics, University of Toronto, Medical Science Building, Room 4386, 1 King's College Cir, Toronto, ON, CAN M5S 1A8, Canada.
- Department of Paediatrics, University of Toronto, Room 1436D, 555 University Avenue, Toronto, ON, CAN M5G 1X8, Canada.
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35
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Gayi E, Neff LA, Massana Muñoz X, Ismail HM, Sierra M, Mercier T, Décosterd LA, Laporte J, Cowling BS, Dorchies OM, Scapozza L. Tamoxifen prolongs survival and alleviates symptoms in mice with fatal X-linked myotubular myopathy. Nat Commun 2018; 9:4848. [PMID: 30451843 PMCID: PMC6243013 DOI: 10.1038/s41467-018-07058-4] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2018] [Accepted: 10/12/2018] [Indexed: 11/08/2022] Open
Abstract
X-linked myotubular myopathy (XLMTM, also known as XLCNM) is a severe congenital muscular disorder due to mutations in the myotubularin gene, MTM1. It is characterized by generalized hypotonia, leading to neonatal death of most patients. No specific treatment exists. Here, we show that tamoxifen, a well-known drug used against breast cancer, rescues the phenotype of Mtm1-deficient mice. Tamoxifen increases lifespan several-fold while improving overall motor function and preventing disease progression including lower limb paralysis. Tamoxifen corrects functional, histological and molecular hallmarks of XLMTM, with improved force output, myonuclei positioning, myofibrillar structure, triad number, and excitation-contraction coupling. Tamoxifen normalizes the expression level of the XLMTM disease modifiers DNM2 and PI3KC2B, likely contributing to the phenotypic rescue. Our findings demonstrate that tamoxifen is a promising candidate for clinical evaluation in XLMTM patients.
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MESH Headings
- Animals
- Class II Phosphatidylinositol 3-Kinases/genetics
- Class II Phosphatidylinositol 3-Kinases/metabolism
- Disease Models, Animal
- Disease Progression
- Dynamin II/genetics
- Dynamin II/metabolism
- Electric Stimulation
- Excitation Contraction Coupling/drug effects
- Female
- Gene Expression/drug effects
- Genes, Lethal
- Humans
- Longevity/drug effects
- Male
- Mice
- Mice, Knockout
- Motor Activity/drug effects
- Muscle, Skeletal/drug effects
- Muscle, Skeletal/metabolism
- Muscle, Skeletal/pathology
- Myofibrils/drug effects
- Myofibrils/metabolism
- Myofibrils/ultrastructure
- Myopathies, Structural, Congenital/drug therapy
- Myopathies, Structural, Congenital/genetics
- Myopathies, Structural, Congenital/metabolism
- Myopathies, Structural, Congenital/pathology
- Protective Agents/pharmacology
- Protein Tyrosine Phosphatases, Non-Receptor/deficiency
- Protein Tyrosine Phosphatases, Non-Receptor/genetics
- Tamoxifen/pharmacology
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Affiliation(s)
- Elinam Gayi
- Pharmaceutical Biochemistry Group, School of Pharmaceutical Sciences, University of Lausanne, University of Geneva, CMU 5-6, Rue Michel-Servet 1, Geneva, 1211, Switzerland
| | - Laurence A Neff
- Pharmaceutical Biochemistry Group, School of Pharmaceutical Sciences, University of Lausanne, University of Geneva, CMU 5-6, Rue Michel-Servet 1, Geneva, 1211, Switzerland
| | - Xènia Massana Muñoz
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, 67404, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, 67404, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, 67404, France
- Université de Strasbourg, Illkirch, 67404, France
| | - Hesham M Ismail
- Pharmaceutical Biochemistry Group, School of Pharmaceutical Sciences, University of Lausanne, University of Geneva, CMU 5-6, Rue Michel-Servet 1, Geneva, 1211, Switzerland
| | - Marta Sierra
- Pharmaceutical Biochemistry Group, School of Pharmaceutical Sciences, University of Lausanne, University of Geneva, CMU 5-6, Rue Michel-Servet 1, Geneva, 1211, Switzerland
| | - Thomas Mercier
- Division and Laboratory of Clinical Pharmacology, Service of Biomedicine, Department of Laboratories, Lausanne University Hospital, Lausanne, 1011, Switzerland
| | - Laurent A Décosterd
- Division and Laboratory of Clinical Pharmacology, Service of Biomedicine, Department of Laboratories, Lausanne University Hospital, Lausanne, 1011, Switzerland
| | - Jocelyn Laporte
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, 67404, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, 67404, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, 67404, France
- Université de Strasbourg, Illkirch, 67404, France
| | - Belinda S Cowling
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch, 67404, France
- Centre National de la Recherche Scientifique (CNRS), UMR7104, Illkirch, 67404, France
- Institut National de la Santé et de la Recherche Médicale (INSERM), U1258, Illkirch, 67404, France
- Université de Strasbourg, Illkirch, 67404, France
| | - Olivier M Dorchies
- Pharmaceutical Biochemistry Group, School of Pharmaceutical Sciences, University of Lausanne, University of Geneva, CMU 5-6, Rue Michel-Servet 1, Geneva, 1211, Switzerland.
| | - Leonardo Scapozza
- Pharmaceutical Biochemistry Group, School of Pharmaceutical Sciences, University of Lausanne, University of Geneva, CMU 5-6, Rue Michel-Servet 1, Geneva, 1211, Switzerland.
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36
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Saha S, Panigrahi DP, Patil S, Bhutia SK. Autophagy in health and disease: A comprehensive review. Biomed Pharmacother 2018; 104:485-495. [PMID: 29800913 DOI: 10.1016/j.biopha.2018.05.007] [Citation(s) in RCA: 353] [Impact Index Per Article: 58.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Revised: 04/12/2018] [Accepted: 05/07/2018] [Indexed: 12/13/2022] Open
Abstract
Autophagy, a conserved catabolic process, plays an immensely significant role in a variety of diseases. However, whether it imparts a protective function in diseases remains debatable. During aging, autophagy gradually subsides, manifested by the reduced formation of autophagic vacuoles and improper fusion of these vacuoles with the lysosomes. Similarly, in neurodegenerative disorders, accumulation of tau and synuclein proteins has been attributed to the decline in the autophagic removal of proteins. Equivalently, lysosomal disorders show an impairment of the autophagic process leading to the accumulation of lipid molecules within lysosomes. On the other hand, activation of the autophagic pathway has also proved beneficial in evading various foreign pathogens, thereby contributing to the innate immunity. In the context of cancer, autophagy has shown to play a puzzling role where it serves as a tumor suppressor during initial stages but later protects the tumor cells from the immune system defense mechanisms. Similarly, muscular and heart disorders have been shown to be positively and negatively regulated by autophagy, respectively. In the present review, we, therefore, present a comprehensive review on the role of autophagy in various diseases and their corresponding outcomes.
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Affiliation(s)
- Sarbari Saha
- Department of Life Science, National Institute of Technology Rourkela, Rourkela 769008, Odisha, India
| | - Debasna P Panigrahi
- Department of Life Science, National Institute of Technology Rourkela, Rourkela 769008, Odisha, India
| | - Shankargouda Patil
- Department of Maxillofacial Surgery and Diagnostic Sciences, Division of Oral Pathology, College of Dentistry, Jazan University, Saudi Arabia
| | - Sujit K Bhutia
- Department of Life Science, National Institute of Technology Rourkela, Rourkela 769008, Odisha, India.
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37
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Danièle N, Moal C, Julien L, Marinello M, Jamet T, Martin S, Vignaud A, Lawlor MW, Buj-Bello A. Intravenous Administration of a MTMR2-Encoding AAV Vector Ameliorates the Phenotype of Myotubular Myopathy in Mice. J Neuropathol Exp Neurol 2018; 77:282-295. [PMID: 29408998 PMCID: PMC5939852 DOI: 10.1093/jnen/nly002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
X-linked myotubular myopathy (XLMTM) is a severe congenital disorder in male infants that leads to generalized skeletal muscle weakness and is frequently associated with fatal respiratory failure. XLMTM is caused by loss-of-function mutations in the MTM1 gene, which encodes myotubularin, the founder member of a family of 15 homologous proteins in mammals. We recently demonstrated the therapeutic efficacy of intravenous delivery of rAAV vectors expressing MTM1 in animal models of myotubular myopathy. Here, we tested whether the closest homologues of MTM1, MTMR1, and MTMR2 (the latter being implicated in Charcot-Marie-Tooth neuropathy type 4B1) are functionally redundant and could represent a therapeutic target for XLMTM. Serotype 9 recombinant AAV vectors encoding either MTM1, MTMR1, or MTMR2 were injected into the tibialis anterior muscle of Mtm1-deficient knockout mice. Two weeks after vector delivery, a therapeutic effect was observed with Mtm1 and Mtmr2, but not Mtmr1; with Mtm1 being the most efficacious transgene. Furthermore, intravenous administration of a single dose of the rAAV9-Mtmr2 vector in XLMTM mice improved the motor activity and muscle strength and prolonged survival throughout a 3-month study. These results indicate that strategies aiming at increasing MTMR2 expression levels in skeletal muscle may be beneficial in the treatment of myotubular myopathy.
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MESH Headings
- Administration, Intravenous
- Animals
- Disease Models, Animal
- Escape Reaction/physiology
- HEK293 Cells
- Humans
- Locomotion/physiology
- Mice
- Muscle Contraction/drug effects
- Muscle Strength
- Muscle, Skeletal/metabolism
- Muscle, Skeletal/pathology
- Muscle, Skeletal/ultrastructure
- Mutation
- Myopathies, Structural, Congenital/genetics
- Myopathies, Structural, Congenital/pathology
- Myopathies, Structural, Congenital/physiopathology
- Myopathies, Structural, Congenital/therapy
- PAX7 Transcription Factor/metabolism
- Phenotype
- Protein Tyrosine Phosphatases, Non-Receptor/administration & dosage
- Protein Tyrosine Phosphatases, Non-Receptor/genetics
- Protein Tyrosine Phosphatases, Non-Receptor/metabolism
- RNA, Messenger/metabolism
- Transduction, Genetic
- Transfection
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Affiliation(s)
- Nathalie Danièle
- INTEGRARE, INSERM UMRS 951, Univ Evry, Université Paris-Saclay, France
- R&D Department, Genethon, Evry, France
- Genethon, Evry, France
| | - Christelle Moal
- INTEGRARE, INSERM UMRS 951, Univ Evry, Université Paris-Saclay, France
- R&D Department, Genethon, Evry, France
- Genethon, Evry, France
| | - Laura Julien
- INTEGRARE, INSERM UMRS 951, Univ Evry, Université Paris-Saclay, France
- R&D Department, Genethon, Evry, France
- Genethon, Evry, France
| | - Martina Marinello
- INTEGRARE, INSERM UMRS 951, Univ Evry, Université Paris-Saclay, France
- R&D Department, Genethon, Evry, France
- Genethon, Evry, France
| | - Thibaud Jamet
- INTEGRARE, INSERM UMRS 951, Univ Evry, Université Paris-Saclay, France
- R&D Department, Genethon, Evry, France
- Genethon, Evry, France
| | - Samia Martin
- R&D Department, Genethon, Evry, France
- Genethon, Evry, France
| | - Alban Vignaud
- R&D Department, Genethon, Evry, France
- Genethon, Evry, France
| | - Michael W Lawlor
- Division of Pediatric Pathology, Department of Pathology and Laboratory Medicine and Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin
| | - Ana Buj-Bello
- INTEGRARE, INSERM UMRS 951, Univ Evry, Université Paris-Saclay, France
- R&D Department, Genethon, Evry, France
- Genethon, Evry, France
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38
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Castets P, Frank S, Sinnreich M, Rüegg MA. "Get the Balance Right": Pathological Significance of Autophagy Perturbation in Neuromuscular Disorders. J Neuromuscul Dis 2018; 3:127-155. [PMID: 27854220 PMCID: PMC5271579 DOI: 10.3233/jnd-160153] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Recent research has revealed that autophagy, a major catabolic process in cells, is dysregulated in several neuromuscular diseases and contributes to the muscle wasting caused by non-muscle disorders (e.g. cancer cachexia) or during aging (i.e. sarcopenia). From there, the idea arose to interfere with autophagy or manipulate its regulatory signalling to help restore muscle homeostasis and attenuate disease progression. The major difficulty for the development of therapeutic strategies is to restore a balanced autophagic flux, due to the dynamic nature of autophagy. Thus, it is essential to better understand the mechanisms and identify the signalling pathways at play in the control of autophagy in skeletal muscle. A comprehensive analysis of the autophagic flux and of the causes of its dysregulation is required to assess the pathogenic role of autophagy in diseased muscle. Furthermore, it is essential that experiments distinguish between primary dysregulation of autophagy (prior to disease onset) and impairments as a consequence of the pathology. Of note, in most muscle disorders, autophagy perturbation is not caused by genetic modification of an autophagy-related protein, but rather through indirect alteration of regulatory signalling or lysosomal function. In this review, we will present the mechanisms involved in autophagy, and those ensuring its tight regulation in skeletal muscle. We will then discuss as to how autophagy dysregulation contributes to the pathogenesis of neuromuscular disorders and possible ways to interfere with this process to limit disease progression.
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Affiliation(s)
| | - Stephan Frank
- Institute of Pathology, Division of Neuropathology Basel University Hospital, Basel, Switzerland
| | - Michael Sinnreich
- Neuromuscular Research Center, Departments of Neurology and Biomedicine, Pharmazentrum, Basel, Switzerland
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39
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Single Intramuscular Injection of AAV-shRNA Reduces DNM2 and Prevents Myotubular Myopathy in Mice. Mol Ther 2018; 26:1082-1092. [PMID: 29506908 DOI: 10.1016/j.ymthe.2018.02.008] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2017] [Revised: 02/02/2018] [Accepted: 02/09/2018] [Indexed: 12/28/2022] Open
Abstract
Myotubular myopathy, or X-linked centronuclear myopathy, is a severe muscle disorder representing a significant burden for patients and their families. It is clinically characterized by neonatal and severe muscle weakness and atrophy. Mutations in the myotubularin (MTM1) gene cause myotubular myopathy, and no specific curative treatment is available. We previously found that dynamin 2 (DNM2) is upregulated in both Mtm1 knockout and patient muscle samples, whereas its reduction through antisense oligonucleotides rescues the clinical and histopathological features of this myopathy in mice. Here, we propose a novel approach targeting Dnm2 mRNA. We screened and validated in vitro and in vivo several short hairpin RNA (shRNA) sequences that efficiently target Dnm2 mRNA. A single intramuscular injection of AAV-shDnm2 resulted in long-term reduction of DNM2 protein level and restored muscle force, mass, histology, and myofiber ultrastructure and prevented molecular defects linked to the disease. Our results demonstrate a robust DNM2 knockdown and provide an alternative strategy based on reduction of DNM2 to treat myotubular myopathy.
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40
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Raess MA, Cowling BS, Bertazzi DL, Kretz C, Rinaldi B, Xuereb JM, Kessler P, Romero NB, Payrastre B, Friant S, Laporte J. Expression of the neuropathy-associated MTMR2 gene rescues MTM1-associated myopathy. Hum Mol Genet 2018; 26:3736-3748. [PMID: 28934386 DOI: 10.1093/hmg/ddx258] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2017] [Accepted: 06/28/2017] [Indexed: 01/15/2023] Open
Abstract
Myotubularins (MTMs) are active or dead phosphoinositides phosphatases defining a large protein family conserved through evolution and implicated in different neuromuscular diseases. Loss-of-function mutations in MTM1 cause the severe congenital myopathy called myotubular myopathy (or X-linked centronuclear myopathy) while mutations in the MTM1-related protein MTMR2 cause a recessive Charcot-Marie-Tooth peripheral neuropathy. Here we aimed to determine the functional specificity and redundancy of MTM1 and MTMR2, and to assess their abilities to compensate for a potential therapeutic strategy. Using molecular investigations and heterologous expression of human MTMs in yeast cells and in Mtm1 knockout mice, we characterized several naturally occurring MTMR2 isoforms with different activities. We identified the N-terminal domain as responsible for functional differences between MTM1 and MTMR2. An N-terminal extension observed in MTMR2 is absent in MTM1, and only the short MTMR2 isoform lacking this N-terminal extension behaved similarly to MTM1 in yeast and mice. Moreover, adeno-associated virus-mediated exogenous expression of several MTMR2 isoforms ameliorates the myopathic phenotype owing to MTM1 loss, with increased muscle force, reduced myofiber atrophy, and reduction of the intracellular disorganization hallmarks associated with myotubular myopathy. Noteworthy, the short MTMR2 isoform provided a better rescue when compared with the long MTMR2 isoform. In conclusion, these results point to the molecular basis for MTMs functional specificity. They also provide the proof-of-concept that expression of the neuropathy-associated MTMR2 gene improves the MTM1-associated myopathy, thus identifying MTMR2 as a novel therapeutic target for myotubular myopathy.
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Affiliation(s)
- Matthieu A Raess
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), 67404 Illkirch, France.,INSERM U964, 67404 Illkirch, France.,CNRS, UMR7104, 67404 Illkirch, France.,Université de Strasbourg, 67404 Illkirch, France.,Department of Molecular and Cellular Genetics, Université de Strasbourg, CNRS, GMGM UMR7156, 67000 Strasbourg, France
| | - Belinda S Cowling
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), 67404 Illkirch, France.,INSERM U964, 67404 Illkirch, France.,CNRS, UMR7104, 67404 Illkirch, France.,Université de Strasbourg, 67404 Illkirch, France
| | - Dimitri L Bertazzi
- Department of Molecular and Cellular Genetics, Université de Strasbourg, CNRS, GMGM UMR7156, 67000 Strasbourg, France
| | - Christine Kretz
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), 67404 Illkirch, France.,INSERM U964, 67404 Illkirch, France.,CNRS, UMR7104, 67404 Illkirch, France.,Université de Strasbourg, 67404 Illkirch, France
| | - Bruno Rinaldi
- Department of Molecular and Cellular Genetics, Université de Strasbourg, CNRS, GMGM UMR7156, 67000 Strasbourg, France
| | - Jean-Marie Xuereb
- INSERM U1048 and Université Toulouse 3, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), 31432 Toulouse, France
| | - Pascal Kessler
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), 67404 Illkirch, France.,INSERM U964, 67404 Illkirch, France.,CNRS, UMR7104, 67404 Illkirch, France.,Université de Strasbourg, 67404 Illkirch, France
| | - Norma B Romero
- INSERM UMRS974, CNRS FRE3617, Center for Research in Myology, Pitié-Salpêtrière Hospital, Sorbonne Universities, Pierre and Marie Curie University, 75013 Paris, France.,Unit of Neuromuscular Morphology, Institute of Myology.,Reference Center for Neuromuscular Pathology Paris-East, Institute of Myology, Public Hospital Network of Paris, Pitié-Salpêtrière Hospital, 75013 Paris, France
| | - Bernard Payrastre
- INSERM U1048 and Université Toulouse 3, Institut des Maladies Métaboliques et Cardiovasculaires (I2MC), 31432 Toulouse, France.,CHU de Toulouse, Laboratoire d'Hématologie, 31059 Toulouse, France
| | - Sylvie Friant
- Department of Molecular and Cellular Genetics, Université de Strasbourg, CNRS, GMGM UMR7156, 67000 Strasbourg, France
| | - Jocelyn Laporte
- Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), 67404 Illkirch, France.,INSERM U964, 67404 Illkirch, France.,CNRS, UMR7104, 67404 Illkirch, France.,Université de Strasbourg, 67404 Illkirch, France
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41
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The MTM1-UBQLN2-HSP complex mediates degradation of misfolded intermediate filaments in skeletal muscle. Nat Cell Biol 2018; 20:198-210. [PMID: 29358706 DOI: 10.1038/s41556-017-0024-9] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2017] [Accepted: 12/06/2017] [Indexed: 12/14/2022]
Abstract
The ubiquitin proteasome system and autophagy are major protein turnover mechanisms in muscle cells, which ensure stemness and muscle fibre maintenance. Muscle cells contain a high proportion of cytoskeletal proteins, which are prone to misfolding and aggregation; pathological processes that are observed in several neuromuscular diseases called proteinopathies. Despite advances in deciphering the mechanisms underlying misfolding and aggregation, little is known about how muscle cells manage cytoskeletal degradation. Here, we describe a process by which muscle cells degrade the misfolded intermediate filament proteins desmin and vimentin by the proteasome. This relies on the MTM1-UBQLN2 complex to recognize and guide these misfolded proteins to the proteasome and occurs prior to aggregate formation. Thus, our data highlight a safeguarding function of the MTM1-UBQLN2 complex that ensures cytoskeletal integrity to avoid proteotoxic aggregate formation.
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42
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Downregulation of myostatin pathway in neuromuscular diseases may explain challenges of anti-myostatin therapeutic approaches. Nat Commun 2017; 8:1859. [PMID: 29192144 PMCID: PMC5709430 DOI: 10.1038/s41467-017-01486-4] [Citation(s) in RCA: 103] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2017] [Accepted: 09/21/2017] [Indexed: 02/07/2023] Open
Abstract
Muscular dystrophies are characterized by weakness and wasting of skeletal muscle tissues. Several drugs targeting the myostatin pathway have been used in clinical trials to increase muscle mass and function but most showed limited efficacy. Here we show that the expression of components of the myostatin signaling pathway is downregulated in muscle wasting or atrophying diseases, with a decrease of myostatin and activin receptor, and an increase of the myostatin antagonist, follistatin. We also provide in vivo evidence in the congenital myotubular myopathy mouse model (knock-out for the myotubularin coding gene Mtm1) that a down-regulated myostatin pathway can be reactivated by correcting the underlying gene defect. Our data may explain the poor clinical efficacy of anti-myostatin approaches in several of the clinical studies and the apparent contradictory results in mice regarding the efficacy of anti-myostatin approaches and may inform patient selection and stratification for future trials.
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43
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Kutchukian C, Szentesi P, Allard B, Trochet D, Beuvin M, Berthier C, Tourneur Y, Guicheney P, Csernoch L, Bitoun M, Jacquemond V. Impaired excitation-contraction coupling in muscle fibres from the dynamin2 R465W mouse model of centronuclear myopathy. J Physiol 2017; 595:7369-7382. [PMID: 29071728 DOI: 10.1113/jp274990] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 10/20/2017] [Indexed: 01/25/2023] Open
Abstract
KEY POINTS Dynamin 2 is a ubiquitously expressed protein involved in membrane trafficking processes. Mutations in the gene encoding dynamin 2 are responsible for a congenital myopathy associated with centrally located nuclei in the muscle fibres. Using muscle fibres from a mouse model of the most common mutation responsible for this disease in humans, we tested whether altered Ca2+ signalling and excitation-contraction coupling contribute to muscle weakness. The plasma membrane network that carries the electrical excitation is moderately perturbed in the diseased muscle fibres. The excitation-activated Ca2+ input fluxes across both the plasma membrane and the membrane of the sarcoplasmic reticulum are defective in the diseased fibres, which probably contributes to muscle weakness in patients. ABSTRACT Mutations in the gene encoding dynamin 2 (DNM2) are responsible for autosomal dominant centronuclear myopathy (AD-CNM). We studied the functional properties of Ca2+ signalling and excitation-contraction (EC) coupling in muscle fibres isolated from a knock-in (KI) mouse model of the disease, using confocal imaging and the voltage clamp technique. The transverse-tubule network organization appeared to be unaltered in the diseased fibres, although its density was reduced by ∼10% compared to that in control fibres. The density of Ca2+ current through CaV1.1 channels and the rate of voltage-activated sarcoplasmic reticulum Ca2+ release were reduced by ∼60% and 30%, respectively, in KI vs. control fibres. In addition, Ca2+ release in the KI fibres reached its peak value 10-50 ms later than in control ones. Activation of Ca2+ transients along the longitudinal axis of the fibres was more heterogeneous in the KI than in the control fibres, with the difference being exacerbated at intermediate membrane voltages. KI fibres exhibited spontaneous Ca2+ release events that were almost absent from control fibres. Overall, the results of the present study demonstrate that Ca2+ signalling and EC coupling exhibit a number of dysfunctions likely contributing to muscle weakness in DNM2-related AD-CNM.
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Affiliation(s)
- Candice Kutchukian
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR-5310, INSERM U-1217, Institut NeuroMyoGène, Villeurbanne, France
| | - Peter Szentesi
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Bruno Allard
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR-5310, INSERM U-1217, Institut NeuroMyoGène, Villeurbanne, France
| | - Delphine Trochet
- Research Center for Myology, UPMC Univ Paris 06 and INSERM UMR_S974, Institute of Myology, Paris, France
| | - Maud Beuvin
- Research Center for Myology, UPMC Univ Paris 06 and INSERM UMR_S974, Institute of Myology, Paris, France
| | - Christine Berthier
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR-5310, INSERM U-1217, Institut NeuroMyoGène, Villeurbanne, France
| | - Yves Tourneur
- CarMeN, INSERM U1060, Faculté de Médecine Lyon Sud, Oullins, France.,UFPE Dept Nutrição, Av. Prof. Moraes Rego, Cidade Universitária, Recife, Brazil
| | - Pascale Guicheney
- Sorbonne Universités, UPMC Univ Paris 06, INSERM UMR_S1166, Institute of Cardiometabolism and Nutrition (ICAN), Paris, France
| | - Laszlo Csernoch
- Department of Physiology, Faculty of Medicine, University of Debrecen, Debrecen, Hungary
| | - Marc Bitoun
- Research Center for Myology, UPMC Univ Paris 06 and INSERM UMR_S974, Institute of Myology, Paris, France
| | - Vincent Jacquemond
- Univ Lyon, Université Claude Bernard Lyon 1, CNRS UMR-5310, INSERM U-1217, Institut NeuroMyoGène, Villeurbanne, France
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44
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Cowling BS, Prokic I, Tasfaout H, Rabai A, Humbert F, Rinaldi B, Nicot AS, Kretz C, Friant S, Roux A, Laporte J. Amphiphysin (BIN1) negatively regulates dynamin 2 for normal muscle maturation. J Clin Invest 2017; 127:4477-4487. [PMID: 29130937 DOI: 10.1172/jci90542] [Citation(s) in RCA: 55] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2016] [Accepted: 10/03/2017] [Indexed: 01/25/2023] Open
Abstract
Regulation of skeletal muscle development and organization is a complex process that is not fully understood. Here, we focused on amphiphysin 2 (BIN1, also known as bridging integrator-1) and dynamin 2 (DNM2), two ubiquitous proteins implicated in membrane remodeling and mutated in centronuclear myopathies (CNMs). We generated Bin1-/- Dnm2+/- mice to decipher the physiological interplay between BIN1 and DNM2. While Bin1-/- mice die perinatally from a skeletal muscle defect, Bin1-/- Dnm2+/- mice survived at least 18 months, and had normal muscle force and intracellular organization of muscle fibers, supporting BIN1 as a negative regulator of DNM2. We next characterized muscle-specific isoforms of BIN1 and DNM2. While BIN1 colocalized with and partially inhibited DNM2 activity during muscle maturation, BIN1 had no effect on the isoform of DNM2 found in adult muscle. Together, these results indicate that BIN1 and DNM2 regulate muscle development and organization, function through a common pathway, and define BIN1 as a negative regulator of DNM2 in vitro and in vivo during muscle maturation. Our data suggest that DNM2 modulation has potential as a therapeutic approach for patients with CNM and BIN1 defects. As BIN1 is implicated in cancers, arrhythmia, and late-onset Alzheimer disease, these findings may trigger research directions and therapeutic development for these common diseases.
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Affiliation(s)
- Belinda S Cowling
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France.,Centre National de la Recherche Scientifique, UMR7104, Illkirch, France.,Université de Strasbourg, Illkirch, France
| | - Ivana Prokic
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France.,Centre National de la Recherche Scientifique, UMR7104, Illkirch, France.,Université de Strasbourg, Illkirch, France
| | - Hichem Tasfaout
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France.,Centre National de la Recherche Scientifique, UMR7104, Illkirch, France.,Université de Strasbourg, Illkirch, France
| | - Aymen Rabai
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France.,Centre National de la Recherche Scientifique, UMR7104, Illkirch, France.,Université de Strasbourg, Illkirch, France
| | - Frédéric Humbert
- Biochemistry Department, University of Geneva, Geneva, Switzerland
| | - Bruno Rinaldi
- Department of Molecular and Cellular Genetics, UMR7156, Université de Strasbourg and CNRS, Strasbourg, France
| | - Anne-Sophie Nicot
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France.,Centre National de la Recherche Scientifique, UMR7104, Illkirch, France.,Université de Strasbourg, Illkirch, France
| | - Christine Kretz
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France.,Centre National de la Recherche Scientifique, UMR7104, Illkirch, France.,Université de Strasbourg, Illkirch, France
| | - Sylvie Friant
- Department of Molecular and Cellular Genetics, UMR7156, Université de Strasbourg and CNRS, Strasbourg, France
| | - Aurélien Roux
- Biochemistry Department, University of Geneva, Geneva, Switzerland.,Swiss National Centre of Competence in Research Programme Chemical Biology, Geneva, Switzerland
| | - Jocelyn Laporte
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Illkirch, France.,Institut National de la Santé et de la Recherche Médicale, U964, Illkirch, France.,Centre National de la Recherche Scientifique, UMR7104, Illkirch, France.,Université de Strasbourg, Illkirch, France
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45
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Tasfaout H, Buono S, Guo S, Kretz C, Messaddeq N, Booten S, Greenlee S, Monia BP, Cowling BS, Laporte J. Antisense oligonucleotide-mediated Dnm2 knockdown prevents and reverts myotubular myopathy in mice. Nat Commun 2017; 8:15661. [PMID: 28589938 PMCID: PMC5467247 DOI: 10.1038/ncomms15661] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2016] [Accepted: 04/18/2017] [Indexed: 01/27/2023] Open
Abstract
Centronuclear myopathies (CNM) are non-dystrophic muscle diseases for which no effective therapy is currently available. The most severe form, X-linked CNM, is caused by myotubularin 1 (MTM1) loss-of-function mutations, while the main autosomal dominant form is due to dynamin2 (DNM2) mutations. We previously showed that genetic reduction of DNM2 expression in Mtm1 knockout (Mtm1KO) mice prevents development of muscle pathology. Here we show that systemic delivery of Dnm2 antisense oligonucleotides (ASOs) into Mtm1KO mice efficiently reduces DNM2 protein level in muscle and prevents the myopathy from developing. Moreover, systemic ASO injection into severely affected mice leads to reversal of muscle pathology within 2 weeks. Thus, ASO-mediated DNM2 knockdown can efficiently correct muscle defects due to loss of MTM1, providing an attractive therapeutic strategy for this disease.
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Affiliation(s)
- Hichem Tasfaout
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch 67404, France.,INSERM U964, Illkirch 67404, France.,CNRS UMR7104, Illkirch 67404, France.,FMTS, Strasbourg University, Illkirch 67404, France
| | - Suzie Buono
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch 67404, France.,INSERM U964, Illkirch 67404, France.,CNRS UMR7104, Illkirch 67404, France.,FMTS, Strasbourg University, Illkirch 67404, France
| | - Shuling Guo
- Ionis Pharmaceuticals Inc., Carlsbad, California 92010, USA
| | - Christine Kretz
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch 67404, France.,INSERM U964, Illkirch 67404, France.,CNRS UMR7104, Illkirch 67404, France.,FMTS, Strasbourg University, Illkirch 67404, France
| | - Nadia Messaddeq
- INSERM U964, Illkirch 67404, France.,CNRS UMR7104, Illkirch 67404, France.,Service de Microscopie Electronique, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch 67404, France
| | - Sheri Booten
- Ionis Pharmaceuticals Inc., Carlsbad, California 92010, USA
| | - Sarah Greenlee
- Ionis Pharmaceuticals Inc., Carlsbad, California 92010, USA
| | - Brett P Monia
- Ionis Pharmaceuticals Inc., Carlsbad, California 92010, USA
| | - Belinda S Cowling
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch 67404, France.,INSERM U964, Illkirch 67404, France.,CNRS UMR7104, Illkirch 67404, France.,FMTS, Strasbourg University, Illkirch 67404, France
| | - Jocelyn Laporte
- Department of Translational Medicine and Neurogenetics, Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Illkirch 67404, France.,INSERM U964, Illkirch 67404, France.,CNRS UMR7104, Illkirch 67404, France.,FMTS, Strasbourg University, Illkirch 67404, France
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46
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Walmsley GL, Blot S, Venner K, Sewry C, Laporte J, Blondelle J, Barthélémy I, Maurer M, Blanchard-Gutton N, Pilot-Storck F, Tiret L, Piercy RJ. Progressive Structural Defects in Canine Centronuclear Myopathy Indicate a Role for HACD1 in Maintaining Skeletal Muscle Membrane Systems. THE AMERICAN JOURNAL OF PATHOLOGY 2016; 187:441-456. [PMID: 27939133 DOI: 10.1016/j.ajpath.2016.10.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/01/2016] [Revised: 10/12/2016] [Accepted: 10/17/2016] [Indexed: 11/16/2022]
Abstract
Mutations in HACD1/PTPLA cause recessive congenital myopathies in humans and dogs. Hydroxyacyl-coA dehydratases are required for elongation of very long chain fatty acids, and HACD1 has a role in early myogenesis, but the functions of this striated muscle-specific enzyme in more differentiated skeletal muscle remain unknown. Canine HACD1 deficiency is histopathologically classified as a centronuclear myopathy (CNM). We investigated the hypothesis that muscle from HACD1-deficient dogs has membrane abnormalities in common with CNMs with different genetic causes. We found progressive changes in tubuloreticular and sarcolemmal membranes and mislocalized triads and mitochondria in skeletal muscle from animals deficient in HACD1. Furthermore, comparable membranous abnormalities in cultured HACD1-deficient myotubes provide additional evidence that these defects are a primary consequence of altered HACD1 expression. Our novel findings, including T-tubule dilatation and disorganization, associated with defects in this additional CNM-associated gene provide a definitive pathophysiologic link with these disorders, confirm that dogs deficient in HACD1 are relevant models, and strengthen the evidence for a unifying pathogenesis in CNMs via defective membrane trafficking and excitation-contraction coupling in muscle. These results build on previous work by determining further functional roles of HACD1 in muscle and provide new insight into the pathology and pathogenetic mechanisms of HACD1 CNM. Consequently, alterations in membrane properties associated with HACD1 mutations should be investigated in humans with related phenotypes.
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Affiliation(s)
- Gemma L Walmsley
- Comparative Neuromuscular Diseases Laboratory, Department of Clinical Sciences and Services, Royal Veterinary College, London, United Kingdom.
| | - Stéphane Blot
- French National Institute of Health and Medical Research (Inserm), Mondor Institute of Biomedical Research (IMRB) U955-E10 Biology of the Neuromuscular System, Créteil, France; University of Paris East, Alfort School of Veterinary Medicine (EnvA), Maisons-Alfort, France
| | - Kerrie Venner
- Electron Microscopy Unit, Institute of Neurology, London, United Kingdom
| | - Caroline Sewry
- Dubowitz Neuromuscular Centre, University College London Institute of Child Health and Great Ormond Street Hospital, London, United Kingdom
| | - Jocelyn Laporte
- Department of Translational Medicine and Neurogenetics, Institute of Genetics and Cellular and Molecular Biology (IGBMC), Inserm U964, CNRS UMR7104, Strasbourg University, Illkirch, France
| | - Jordan Blondelle
- French National Institute of Health and Medical Research (Inserm), Mondor Institute of Biomedical Research (IMRB) U955-E10 Biology of the Neuromuscular System, Créteil, France; University of Paris East, Alfort School of Veterinary Medicine (EnvA), Maisons-Alfort, France
| | - Inès Barthélémy
- French National Institute of Health and Medical Research (Inserm), Mondor Institute of Biomedical Research (IMRB) U955-E10 Biology of the Neuromuscular System, Créteil, France; University of Paris East, Alfort School of Veterinary Medicine (EnvA), Maisons-Alfort, France
| | - Marie Maurer
- French National Institute of Health and Medical Research (Inserm), Mondor Institute of Biomedical Research (IMRB) U955-E10 Biology of the Neuromuscular System, Créteil, France; University of Paris East, Alfort School of Veterinary Medicine (EnvA), Maisons-Alfort, France
| | - Nicolas Blanchard-Gutton
- French National Institute of Health and Medical Research (Inserm), Mondor Institute of Biomedical Research (IMRB) U955-E10 Biology of the Neuromuscular System, Créteil, France; University of Paris East, Alfort School of Veterinary Medicine (EnvA), Maisons-Alfort, France
| | - Fanny Pilot-Storck
- French National Institute of Health and Medical Research (Inserm), Mondor Institute of Biomedical Research (IMRB) U955-E10 Biology of the Neuromuscular System, Créteil, France; University of Paris East, Alfort School of Veterinary Medicine (EnvA), Maisons-Alfort, France
| | - Laurent Tiret
- French National Institute of Health and Medical Research (Inserm), Mondor Institute of Biomedical Research (IMRB) U955-E10 Biology of the Neuromuscular System, Créteil, France; University of Paris East, Alfort School of Veterinary Medicine (EnvA), Maisons-Alfort, France
| | - Richard J Piercy
- Comparative Neuromuscular Diseases Laboratory, Department of Clinical Sciences and Services, Royal Veterinary College, London, United Kingdom
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Phosphatidylinositol 3-kinase inhibition restores Ca2+ release defects and prolongs survival in myotubularin-deficient mice. Proc Natl Acad Sci U S A 2016; 113:14432-14437. [PMID: 27911767 DOI: 10.1073/pnas.1604099113] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Mutations in the gene encoding the phosphoinositide 3-phosphatase myotubularin (MTM1) are responsible for a pediatric disease of skeletal muscle named myotubular myopathy (XLMTM). Muscle fibers from MTM1-deficient mice present defects in excitation-contraction (EC) coupling likely responsible for the disease-associated fatal muscle weakness. However, the mechanism leading to EC coupling failure remains unclear. During normal skeletal muscle EC coupling, transverse (t) tubule depolarization triggers sarcoplasmic reticulum (SR) Ca2+ release through ryanodine receptor channels gated by conformational coupling with the t-tubule voltage-sensing dihydropyridine receptors. We report that MTM1 deficiency is associated with a 60% depression of global SR Ca2+ release over the full range of voltage sensitivity of EC coupling. SR Ca2+ release in the diseased fibers is also slower than in normal fibers, or delayed following voltage activation, consistent with the contribution of Ca2+-gated ryanodine receptors to EC coupling. In addition, we found that SR Ca2+ release is spatially heterogeneous within myotubularin-deficient muscle fibers, with focally defective areas recapitulating the global alterations. Importantly, we found that pharmacological inhibition of phosphatidylinositol 3-kinase (PtdIns 3-kinase) activity rescues the Ca2+ release defects in isolated muscle fibers and increases the lifespan and mobility of XLMTM mice, providing proof of concept for the use of PtdIns 3-kinase inhibitors in myotubular myopathy and suggesting that unbalanced PtdIns 3-kinase activity plays a critical role in the pathological process.
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Sabha N, Volpatti JR, Gonorazky H, Reifler A, Davidson AE, Li X, Eltayeb NM, Dall'Armi C, Di Paolo G, Brooks SV, Buj-Bello A, Feldman EL, Dowling JJ. PIK3C2B inhibition improves function and prolongs survival in myotubular myopathy animal models. J Clin Invest 2016; 126:3613-25. [PMID: 27548528 DOI: 10.1172/jci86841] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/01/2016] [Accepted: 05/19/2016] [Indexed: 11/17/2022] Open
Abstract
Myotubular myopathy (MTM) is a devastating pediatric neuromuscular disorder of phosphoinositide (PIP) metabolism resulting from mutations of the PIP phosphatase MTM1 for which there are no treatments. We have previously shown phosphatidylinositol-3-phosphate (PI3P) accumulation in animal models of MTM. Here, we tested the hypothesis that lowering PI3P levels may prevent or reverse the MTM disease process. To test this, we targeted class II and III PI3 kinases (PI3Ks) in an MTM1-deficient mouse model. Muscle-specific ablation of Pik3c2b, but not Pik3c3, resulted in complete prevention of the MTM phenotype, and postsymptomatic targeting promoted a striking rescue of disease. We confirmed this genetic interaction in zebrafish, and additionally showed that certain PI3K inhibitors prevented development of the zebrafish mtm phenotype. Finally, the PI3K inhibitor wortmannin improved motor function and prolonged lifespan of the Mtm1-deficient mice. In all, we have identified Pik3c2b as a genetic modifier of Mtm1 mutation and demonstrated that PIK3C2B inhibition is a potential treatment strategy for MTM. In addition, we set the groundwork for similar reciprocal inhibition approaches for treating other PIP metabolic disorders and highlight the importance of modifier gene pathways as therapeutic targets.
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49
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Lawlor MW, Beggs AH, Buj-Bello A, Childers MK, Dowling JJ, James ES, Meng H, Moore SA, Prasad S, Schoser B, Sewry CA. Skeletal Muscle Pathology in X-Linked Myotubular Myopathy: Review With Cross-Species Comparisons. J Neuropathol Exp Neurol 2016; 75:102-10. [PMID: 26823526 PMCID: PMC4765322 DOI: 10.1093/jnen/nlv020] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
X-linked myotubular myopathy (XLMTM) is a devastating, rare, congenital myopathy caused by mutations in the MTM1 gene, resulting in a lack of or dysfunction of the enzyme myotubularin. This leads to severe perinatal weakness and distinctive muscle pathology. It was originally thought that XLMTM was related to developmental arrest in myotube maturation; however, the generation and characterization of several animal models have significantly improved our understanding of clinical and pathological aspects of this disorder. Myotubularin is now known to participate in numerous cellular processes including endosomal trafficking, excitation-contraction coupling, cytoskeletal organization, neuromuscular junction structure, autophagy, and satellite cell proliferation and survival. The available vertebrate models of XLMTM, which vary in severity from complete absence to reduced functional levels of myotubularin, recapitulate features of the human disease to a variable extent. Understanding how pathological endpoints in animals with XLMTM translate to human patients will be essential to interpret preclinical treatment trials and translate therapies into human clinical studies. This review summarizes the published animal models of XLMTM, including those of zebrafish, mice, and dogs, with a focus on their pathological features as compared to those seen in human XLMTM patients.
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50
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Mansour R, Severin S, Xuereb JM, Gratacap MP, Laporte J, Buj-Bello A, Tronchère H, Payrastre B. Expression of myotubularins in blood platelets: Characterization and potential diagnostic of X-linked myotubular myopathy. Biochem Biophys Res Commun 2016; 476:167-73. [DOI: 10.1016/j.bbrc.2016.04.127] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2016] [Accepted: 04/24/2016] [Indexed: 10/21/2022]
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