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1. Hepatic expression of GAA results in enhanced enzyme bioavailability in mice and non-human primates

Author

Catalina Abad, N. Danièle, Jayme M.L. Nordin, Giuseppe Ronzitti, Bernard Gjata, Helena Costa-Verdera, Simon Barral, Sean M. Armour, Marcelo Simon-Sola, Fanny Collaud, Marco Crosariol, Julien Fabregue, David A. Gross, Mathew Li, Jérémie Cosette, Laetitia van Wittenberghe, Pasqualina Colella, Maryse Moya-Nilges, G. Michael Preston, Christopher Riling, Xavier M. Anguela, Federico Mingozzi, Severine Charles, Pauline Sellier, Tom Antrilli, William J. Quinn, Umut Cagin, Jacomina Krijnse-Locker, Olivier Boyer, Généthon, Approches génétiques intégrées et nouvelles thérapies pour les maladies rares (INTEGRARE), Université d'Évry-Val-d'Essonne (UEVE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris-Saclay-Généthon, Centre de recherche en Myologie – U974 SU-INSERM, Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU), Spark Therapeutics [Philadelphia, PA, USA], Institut Pasteur [Paris] (IP), Plateforme BioImagerie Ultrastructurale – Ultrastructural BioImaging Platform (UTechS UBI), Institute for Research and Innovation in Biomedicine (IRIB), Université de Rouen Normandie (UNIROUEN), Normandie Université (NU)-Normandie Université (NU)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), This work was supported by Genethon and the French Muscular Dystrophy Association,the European Union’s research and innovation program under grant agreement no.667751 (to F.M.), the European Research Council Consolidator Grant under grantagreement no. 617432 (to F.M.), Marie Skłodowska-Curie Actions Individual Fellowship(MSCA-IF) grant agreement no. 797144 (to U.C.), a grant from the DIM ThérapieGénique (to D.A.G.) and by Spark Therapeutics under a sponsored research agreementto Genethon., ANR-16-CE92-0008,membrane dynamics,Rupture et réparation membranaire : stratégies d'assemblage virale(2016), European Project: 667751,H2020,H2020-PHC-2015-two-stage,MYOCURE(2016), European Project: 617432,EC:FP7:ERC,ERC-2013-CoG,MOMAAV(2014), Gestionnaire, Hal Sorbonne Université, Development of an innovative gene therapy platform to cure rare hereditary muscle disorders - MYOCURE - - H20202016-01-01 - 2019-12-31 - 667751 - VALID, Molecular signatures and Modulation of immunity to Adeno-Associated Virus vectors - MOMAAV - - EC:FP7:ERC2014-07-01 - 2019-06-30 - 617432 - VALID, Thérapie des maladies du muscle strié, Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU), and Institut Pasteur [Paris]

Subjects
Male, congenital, hereditary, and neonatal diseases and abnormalities, Genetic enhancement, Science, Metabolic disorders, General Physics and Astronomy, Pharmacology, General Biochemistry, Genetics and Molecular Biology, Virus, Article, law.invention, 03 medical and health sciences, Mice, 0302 clinical medicine, Gene therapy, Pharmacokinetics, law, Autophagy, Distribution (pharmacology), Medicine, Animals, Enzyme Replacement Therapy, 030304 developmental biology, chemistry.chemical_classification, 0303 health sciences, Multidisciplinary, [SDV.MHEP] Life Sciences [q-bio]/Human health and pathology, business.industry, Glycogen Storage Disease Type II, nutritional and metabolic diseases, alpha-Glucosidases, General Chemistry, Enzyme replacement therapy, Phenotype, 3. Good health, Enzyme, chemistry, Liver, Recombinant DNA, Female, business, 030217 neurology & neurosurgery, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology
Abstract

Pompe disease (PD) is a severe neuromuscular disorder caused by deficiency of the lysosomal enzyme acid alpha-glucosidase (GAA). PD is currently treated with enzyme replacement therapy (ERT) with intravenous infusions of recombinant human GAA (rhGAA). Although the introduction of ERT represents a breakthrough in the management of PD, the approach suffers from several shortcomings. Here, we developed a mouse model of PD to compare the efficacy of hepatic gene transfer with adeno-associated virus (AAV) vectors expressing secretable GAA with long-term ERT. Liver expression of GAA results in enhanced pharmacokinetics and uptake of the enzyme in peripheral tissues compared to ERT. Combination of gene transfer with pharmacological chaperones boosts GAA bioavailability, resulting in improved rescue of the PD phenotype. Scale-up of hepatic gene transfer to non-human primates also successfully results in enzyme secretion in blood and uptake in key target tissues, supporting the ongoing clinical translation of the approach., Pompe disease is currently treated with enzyme replacement therapy (ERT) with recombinant human acid alpha-glucosidase (GAA). Here, the authors show hepatic-directed gene therapy with AAV vectors enhances GAA bioavailability compared with ERT, resulting in improved rescue of the disease phenotype in mice and broad enzyme distribution in mice and non-human primates.

Published
2021
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2. Gene therapy with secreted acid alpha-glucosidase rescues Pompe disease in a novel mouse model with early-onset spinal cord and respiratory defects

Author

M. Biferi, Bernard Gjata, Nicolas Guerchet, Laetitia van Wittenberghe, Fanny Collaud, N. Danièle, Manuel Gómez, Severine Charles, Pauline Sellier, M. Cohen-Tannoudji, Guillaume Tanniou, Federico Mingozzi, Jacomina Krijnse-Locker, Umut Cagin, Maryse Moya-Nilges, Pasqualina Colella, Marcelo Simon-Sola, Approches génétiques intégrées et nouvelles thérapies pour les maladies rares (INTEGRARE), Université d'Évry-Val-d'Essonne (UEVE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris-Saclay-Généthon, Centre de Recherche en Myologie, Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU), Thérapie des maladies du muscle strié, Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU), Institut Pasteur [Paris], Funding: This work was supported by Genethon, the French Muscular Dystrophy Association (AFM), the European Commission (grant nos. 667751, 617432, and 797144), and Spark Therapeutics., European Project: 667751,H2020,H2020-PHC-2015-two-stage,MYOCURE(2016), European Project: 617432,EC:FP7:ERC,ERC-2013-CoG,MOMAAV(2014), Centre de recherche en Myologie – U974 SU-INSERM, Institut Pasteur [Paris] (IP), ANR-16-CE92-0008,membrane dynamics,Rupture et réparation membranaire : stratégies d'assemblage virale(2016), French Muscular Dystrophy Association, European Union, European Research Council, and Unión Europea

Subjects
Male, 0301 basic medicine, Genetic enhancement, [SDV]Life Sciences [q-bio], Gene Expression, lcsh:Medicine, Mice, 0302 clinical medicine, Transduction, Genetic, Medicine, Respiratory function, Muscular dystrophy, Respiratory system, Mice, Knockout, Motor Neurons, lcsh:R5-920, Spinal cord, Glycogen Storage Disease Type II, Homozygote, Gene Transfer Techniques, Pompe disease, AAV, General Medicine, Dependovirus, Prognosis, Immunohistochemistry, 3. Good health, Phenotype, Treatment Outcome, medicine.anatomical_structure, 030220 oncology & carcinogenesis, Acid alpha-glucosidase, Muscle, medicine.symptom, lcsh:Medicine (General), Glycogen, Research Paper, congenital, hereditary, and neonatal diseases and abnormalities, Genetic Vectors, General Biochemistry, Genetics and Molecular Biology, Mouse model, 03 medical and health sciences, Animals, Muscle Strength, Muscle, Skeletal, Alleles, business.industry, lcsh:R, Muscle weakness, Skeletal muscle, nutritional and metabolic diseases, alpha-Glucosidases, Genetic Therapy, medicine.disease, Disease Models, Animal, 030104 developmental biology, Immunology, business
Abstract

Pompe disease (PD) is a neuromuscular disorder caused by deficiency of acidalpha-glucosidase (GAA), leading to motor and respiratory dysfunctions. Available Gaa knock-out (KO) mouse models do not accurately mimic PD, particularly its highly impaired respiratory phenotype. Here we developed a new mouse model of PD crossing Gaa KOB6;129 with DBA2/J mice. We subsequently treated Gaa KODBA2/J mice with adeno-associated virus (AAV) vectors expressing a secretable form of GAA (secGAA). Male Gaa KODBA2/J mice present most of the key features of the human disease, including early lethality, severe respiratory impairment, cardiac hypertrophy and muscle weakness. Transcriptome analyses of Gaa KODBA2/J, compared to the parental Gaa KOB6;129 mice, revealed a profoundly impaired gene signature in the spinal cord and a similarly deregulated gene expression in skeletal muscle. Muscle and spinal cord transcriptome changes, biochemical defects, respiratory and muscle function in the Gaa KODBA2/J model were significantly improved upon gene therapy with AAV vectors expressing secGAA. These data show that the genetic background impacts on the severity of respiratory function and neuroglial spinal cord defects in the Gaa KO mouse model of PD. Our findings have implications for PD prognosis and treatment, show novel molecular pathophysiology mechanisms of the disease and provide a unique model to study PD respiratory defects, which majorly affect patients. This work was supported by Genethon, the French Muscular Dystrophy Association (AFM), the European Commission (grant nos. 667751, 617432, and 797144), and Spark Therapeutics. This work was supported by Genethon and the French Muscular Dystrophy Association (AFM, to F.M.). It was also supported by the European Union’s research and innovation program under grant agreement no. 667751 (to F.M.), the European Research Council Consolidator Grant under grant agreement no. 617432 (to F.M.), Marie Skodowska-Curie Actions Individual Fellowship (MSCA-IF) grant agreement no. 797144 (to U.C.), and by Spark Therapeutics under a sponsored research agreement. Sí

Published
2020
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3. An AAV-SGCG Dose-Response Study in a γ-Sarcoglycanopathy Mouse Model in the Context of Mechanical Stress

Author

Fatima Amor, Marie Montus, David Israeli, Jérémie Cosette, Daniel Stockholm, Isabelle Richard, Guillaume Corre, Jerome Poupiot, Bernard Gjata, Approches génétiques intégrées et nouvelles thérapies pour les maladies rares (INTEGRARE), École pratique des hautes études (EPHE)-Université d'Évry-Val-d'Essonne (UEVE)-GENETHON 3-Institut National de la Santé et de la Recherche Médicale (INSERM), Généthon, Evry, Généthon, Genethon, École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Évry-Val-d'Essonne (UEVE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Généthon, École Pratique des Hautes Études (EPHE), and CCSD, Accord Elsevier

Subjects
0301 basic medicine, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, [SDV.GEN] Life Sciences [q-bio]/Genetics, γ-sarcoglycanopathy, translational medicine, 0302 clinical medicine, limb girdle muscular dystrophy, ComputingMilieux_MISCELLANEOUS, [SDV.BIBS] Life Sciences [q-bio]/Quantitative Methods [q-bio.QM], Sarcoglycans, lcsh:Cytology, AAV, musculoskeletal system, gene therapy, [SDV.BIBS]Life Sciences [q-bio]/Quantitative Methods [q-bio.QM], 3. Good health, Cell biology, 030220 oncology & carcinogenesis, miRNA biomarker, Molecular Medicine, [SDV.IMM]Life Sciences [q-bio]/Immunology, Sarcoglycanopathies, musculoskeletal diseases, [SDV.IMM] Life Sciences [q-bio]/Immunology, lcsh:QH426-470, Context (language use), [SDV.BC]Life Sciences [q-bio]/Cellular Biology, Biology, Article, 03 medical and health sciences, SGCG, Glycoprotein complex, [SDV.BBM] Life Sciences [q-bio]/Biochemistry, Molecular Biology, Genetics, medicine, [SDV.BBM]Life Sciences [q-bio]/Biochemistry, Molecular Biology, lcsh:QH573-671, [SDV.BC] Life Sciences [q-bio]/Cellular Biology, Molecular Biology, [SDV.GEN]Life Sciences [q-bio]/Genetics, Sarcolemma, mechanical stress, medicine.disease, [SDV.BIO] Life Sciences [q-bio]/Biotechnology, lcsh:Genetics, 030104 developmental biology, Sarcoglycanopathy, LGMD2C, Limb-girdle muscular dystrophy
Abstract

Sarcoglycanopathies are rare autosomic limb girdle muscular dystrophies caused by mutations in one of the genes coding for sarcoglycans. Sarcoglycans form a complex, which is an important part of the dystrophin-associated glycoprotein complex and which protects the sarcolemma against muscle contraction-induced damage. Absence of one of the sarcoglycans on the plasma membrane reduces the stability of the whole complex and perturbs muscle fiber membrane integrity. There is currently no curative treatment for any of the sarcoglycanopathies. A first clinical trial to evaluate the safety of a recombinant AAV2/1 vector expressing γ-sarcoglycan using an intramuscular route of administration showed limited expression of the transgene and good tolerance of the approach. In this report, we undertook a dose-effect study in mice to evaluate the efficiency of an AAV2/8-expressing γ-sarcoglycan controlled by a muscle-specific promoter with a systemic mode of administration. We observed a dose-related efficiency with a nearly complete restoration of gamma sarcoglycan (SGCG) expression, histological appearance, biomarker level, and whole-body strength at the highest dose tested. In addition, our data suggest that a high expression threshold level must be achieved for effective protection of the transduced muscle, while a suboptimal transgene expression level might be less protective in the context of mechanical stress. Keywords: LGMD2C, γ-sarcoglycanopathy, limb girdle muscular dystrophy, gene therapy, translational medicine, AAV, miRNA biomarker, mechanical stress

Published
2019
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4. Temporary Reduction of Membrane CD4 with the Antioxidant MnTBAP Is Sufficient to Prevent Immune Responses Induced by Gene Transfer

Author

Thi My Anh Neildez-Nguyen, Fanny Onodi, Sylvie Da Rocha, Jérôme Poupiot, David Fenard, J.L. Bigot, Guillaume Corre, Jérémie Cosette, Anne Galy, Bernard Gjata, École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL), Approches génétiques intégrées et nouvelles thérapies pour les maladies rares (INTEGRARE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Évry-Val-d'Essonne (UEVE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Généthon, Université d'Évry-Val-d'Essonne (UEVE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris-Saclay-Généthon, École Pratique des Hautes Études (EPHE), and CCSD, Accord Elsevier

Subjects
0301 basic medicine, Antioxidant, media_common.quotation_subject, Genetic enhancement, medicine.medical_treatment, [SDV]Life Sciences [q-bio], Virus, Article, Immunomodulation, 03 medical and health sciences, 0302 clinical medicine, Immune system, Downregulation and upregulation, rAAV capsid, redosing, MnTBAP, Genetics, medicine, p56lck, neutralizing antibodies, Vector (molecular biology), Internalization, gene transfer, Molecular Biology, media_common, membrane CD4 internalization, antigen reexposure, Chemistry, 3. Good health, Cell biology, [SDV] Life Sciences [q-bio], gp120, 030104 developmental biology, Immunization, 030220 oncology & carcinogenesis, Molecular Medicine
Abstract

International audience; Unexpectedly, the synthetic antioxidant MnTBAP was found to cause a rapid and reversible downregulation of CD4 on T cells in vitro and in vivo. This effect resulted from the internalization of membrane CD4 T cell molecules into clathrin-coated pits and involved disruption of the CD4/p56(Lck) complex. The CD4 deprivation induced by MnTBAP had functional consequences on CD4-dependent infectious processes or immunological responses as shown in various models, including gene therapy. In cultured human T cells, MnTBAP-induced downregulation of CD4 functionally suppressed gp120- mediated lentiviral transduction in a model relevant for HIV infection. The injection of MnTBAP in mice reduced membrane CD4 on lymphocytes in vivo within 5 days of treatment, preventing OVA peptide T cell immunization while allowing subsequent immunization once treatment was stopped. In a mouse gene therapy model, MnTBAP treatment at the time of adenovirus-associated virus (AAV) vector administration, successfully controlled the induction of anti-transgene and anti-capsid immune responses mediated by CD4(+) T cells, enabling the redosing mice with the same vector. These functional data provide new avenues to develop alternative therapeutic immunomodulatory strategies based on temporary regulation of CD4. These could be particularly useful for AAV gene therapy in which novel strategies for redosing are needed.

Published
2019
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5. Biosafety Studies of a Clinically Applicable Lentiviral Vector for the Gene Therapy of Artemis-SCID

Author

Grégory Cédrone, Alain Fischer, Sabine Charrier, Axel Schambach, Michael Rothe, Chantal Lagresle-Peyrou, Bernard Gjata, Salima Hacein-Bey-Abina, Jean-Pierre de Villartay, Fulvio Mavilio, Anne Galy, Valentina Poletti, Marina Cavazzana, Barenbrug, Pierantoni-Morgagni Hospital, Partenaires INRAE, Généthon, Laboratoire de Probabilités, Statistiques et Modélisations (LPSM (UMR_8001)), Université Paris Diderot - Paris 7 (UPD7)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), CHU Necker - Enfants Malades [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Approches génétiques intégrées et nouvelles thérapies pour les maladies rares (INTEGRARE), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Évry-Val-d'Essonne (UEVE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Généthon, Université d'Évry-Val-d'Essonne (UEVE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris-Saclay-Généthon, Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO), Imagine - Institut des maladies génétiques (IHU) (Imagine - U1163), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Cité (UPCité), CIC Necker Enfants Malades (CIC 9303), Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Hannover Medical School [Hannover] (MHH), Collège de France (CdF (institution)), and CCSD, Accord Elsevier

Subjects
0301 basic medicine, lcsh:QH426-470, DCLRE1C, Genetic enhancement, Transgene, T cell, [SDV]Life Sciences [q-bio], SCID, primary immunodeficiency, Artemis, Article, Viral vector, 03 medical and health sciences, 0302 clinical medicine, preclinical study, Genetics, medicine, lcsh:QH573-671, Molecular Biology, mouse, B cell, Severe combined immunodeficiency, lcsh:Cytology, business.industry, gene therapy, medicine.disease, 3. Good health, [SDV] Life Sciences [q-bio], lcsh:Genetics, 030104 developmental biology, medicine.anatomical_structure, 030220 oncology & carcinogenesis, Cancer research, Molecular Medicine, Stem cell, business
Abstract

Genetic deficiency of the nuclease DCLRE1C/Artemis causes radiosensitive severe combined immunodeficiency (RS-SCID) with lack of peripheral T and B cells and increased sensitivity to ionizing radiations. Gene therapy based on transplanting autologous gene-modified hematopoietic stem cells could significantly improve the health of patients with RS-SCID by correcting their immune system. A lentiviral vector expressing physiological levels of human ARTEMIS mRNA from an EF1a promoter without post-transcriptional regulation was developed as a safe clinically applicable candidate for RS-SCID gene therapy. The vector was purified in GMP-comparable conditions and was not toxic in vitro or in vivo. Long-term engraftment of vector-transduced hematopoietic cells was achieved in irradiated Artemis-deficient mice following primary and secondary transplantation (6 months each). Vector-treated mice displayed T and B lymphopoiesis and polyclonal T cells, had structured lymphoid tissues, and produced immunoglobulins. Benign signs of inflammation were noted following secondary transplants, likely a feature of the model. There was no evidence of transgene toxicity and no induction of hematopoietic malignancy. In vitro, the vector had low genotoxic potential on murine hematopoietic progenitor cells using an immortalization assay. Altogether, these preclinical data show safety and efficacy, and support further development of the vector for the gene therapy of RS-SCID. Keywords: gene therapy, SCID, primary immunodeficiency, Artemis, T cell, B cell, mouse, preclinical study

Published
2019
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6. Rescue of GSDIII Phenotype with Gene Transfer Requires Liver- and Muscle-Targeted GDE Expression

Author

Federico Mingozzi, Patrice Vidal, Helena Costa Verdera, Bernard Gjata, Francesco Puzzo, Giuseppe Ronzitti, Laetitia van Wittenberghe, Giacomo P. Comi, Gilles Mithieux, Fanny Collaud, Sabrina Lucchiari, Pascal Laforêt, Edoardo Malfatti, Louisa Jauze, Monika Gjorgjieva, Fabienne Rajas, Marcelo Simon Sola, Solenne Marmier, Alban Vignaud, Serena Pagliarani, Severine Charles, Isabelle Richard, Pasqualina Colella, Université Pierre et Marie Curie - Paris 6 (UPMC), Approches génétiques intégrées et nouvelles thérapies pour les maladies rares (INTEGRARE), École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Évry-Val-d'Essonne (UEVE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Généthon, Institut National de la Santé et de la Recherche Médicale (INSERM), Department of Physiopatology and Transplantation, University of Milan (DEPT), Università degli Studi di Milano = University of Milan (UNIMI), IRCCS Foundation Ca' Granda Ospedale Maggiore Policlinico, Généthon, Université Pierre et Marie Curie - Paris 6 - UFR de Médecine Pierre et Marie Curie (UPMC), Nutrition et cerveau (U1213, U855), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM), Department of Pathophysiology and Transplantation, Institut de Myologie, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), U855, Nutrition et cerveau, Centre de recherche en Myologie – U974 SU-INSERM, Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU), ANR-17-CE18-0014,TRACeGSDIII,Optimisation translationnelle d'un vecteur AAV pour le traitement de GSDIII(2017), École pratique des hautes études (EPHE), Richard, Isabelle, Centre de recherche en myologie, Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut national de la santé et de la recherche médicale, Université d’Evry Val d’Essonne, Genethon (INSERM), University of Milan, Université de Lyon, Généthon, Evry, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Nutrition, diabète et cerveau, École pratique des hautes études (EPHE)-Université d'Évry-Val-d'Essonne (UEVE)-GENETHON 3-Institut National de la Santé et de la Recherche Médicale (INSERM), GENETHON, Genethon, Université d'Évry-Val-d'Essonne (UEVE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Généthon-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), and Centre National de la Recherche Scientifique (CNRS)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Association française contre les myopathies (AFM-Téléthon)-Sorbonne Université (SU)

Subjects
Blood Glucose, Male, 0301 basic medicine, [SDV.BIO]Life Sciences [q-bio]/Biotechnology, Genetic enhancement, MESH: Glycogen, Gene Expression, MESH: Dependovirus, Glycogen storage disease type III, [SDV.BBM.BM] Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology, MESH: Mice, Knockout, MESH: Hepatocytes, Mice, chemistry.chemical_compound, dual AAV vectors, MESH: Genetic Vectors, Drug Discovery, MESH: Animals, Vector (molecular biology), MESH: Glycogen Storage Disease Type III, MESH: Organ Specificity, Mice, Knockout, MESH: Muscle, Skeletal, Glycogen, Gene Transfer Techniques, Dependovirus, Phenotype, Cori disease, gene therapy, 3. Good health, Cell biology, Liver, Organ Specificity, Acid alpha-glucosidase, Molecular Medicine, [SDV.NEU]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC], Original Article, medicine.symptom, MESH: Enzyme Activation, MESH: Gene Expression, Transgene, Genetic Vectors, adeno-associated vector, MESH: Gene Transfer Techniques, Biology, [SDV.GEN.GH] Life Sciences [q-bio]/Genetics/Human genetics, MESH: Phenotype, 03 medical and health sciences, glycogenosis, Genetics, medicine, Animals, MESH: Glycogen Debranching Enzyme System, Muscle, Skeletal, Molecular Biology, MESH: Mice, glycogen storage disease type III, Pharmacology, MESH: Genetic Therapy, Muscle weakness, Glycogen Debranching Enzyme System, [SDV.BBM.BM]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology, Genetic Therapy, neuromuscular disease, medicine.disease, MESH: Male, [SDV.BIO] Life Sciences [q-bio]/Biotechnology, Enzyme Activation, Disease Models, Animal, 030104 developmental biology, chemistry, [SDV.GEN.GH]Life Sciences [q-bio]/Genetics/Human genetics, acid-alpha-glucosidase, Hepatocytes, MESH: Biomarkers, MESH: Blood Glucose, MESH: Disease Models, Animal, Biomarkers, MESH: Liver
Abstract

International audience; Glycogen storage disease type III (GSDIII) is an autosomal recessive disorder caused by a deficiency of glycogen-debranching enzyme (GDE), which results in profound liver metabolism impairment and muscle weakness. To date, no cure is available for GSDIII and current treatments are mostly based on diet. Here we describe the development of a mouse model of GSDIII, which faithfully recapitulates the main features of the human condition. We used this model to develop and test novel therapies based on adeno-associated virus (AAV) vector-mediated gene transfer. First, we showed that overexpression of the lysosomal enzyme alpha-acid glucosidase (GAA) with an AAV vector led to a decrease in liver glycogen content but failed to reverse the disease phenotype. Using dual overlapping AAV vectors expressing the GDE transgene in muscle, we showed functional rescue with no impact on glucose metabolism. Liver expression of GDE, conversely, had a direct impact on blood glucose levels. These results provide proof of concept of correction of GSDIII with AAV vectors, and they indicate that restoration of the enzyme deficiency in muscle and liver is necessary to address both the metabolic and neuromuscular manifestations of the disease.

Published
2018
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7. Long-term microdystrophin gene therapy is effective in a canine model of Duchenne muscular dystrophy

Author

Virginie François, Oumeya Adjali, Jean-Yves Hogrel, George Dickson, Thibaut Larcher, Maeva Dutilleul, Taeyoung Koo, Marie Montus, Stéphane Ederhy, Stéphane Blot, M. Allais, Carole Masurier, Alberto Malerba, Marie Devaux, B. Matot, Karim Wahbi, Sophie Moullec, Bernard Gjata, Bodvael Fraysse, Laurent Servais, Fulvio Mavilio, Inès Barthélémy, Pierre G. Carlier, Takis Athanasopoulos, Isabelle Testault, Samia Martin, Jack-Yves Deschamps, Philippe Moullier, Federico Mingozzi, Philippe Veron, Christophe Georger, Johanne Le Duff, Caroline Le Guiner, Thomas Voit, Jean-Laurent Thibaut, U1089, Institut National de la Santé et de la Recherche Médicale (INSERM), Service of Clinical Trials and Databases, Institut de Myologie, Université Pierre et Marie Curie - Paris 6 (UPMC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Généthon, Centre de recherche en Myologie – U974 SU-INSERM, Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU), Laboratoire de Thérapie Génique Translationnelle des Maladies Génétiques (Inserm UMR 1089), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN), Centre de Boisbonne, Atlantic Gene Therapies, Ecole Nationale Vétérinaire Agroalimentaire et de l'Alimentation Nantes Atlantique (ONIRIS), Thérapie génique translationnelle pour les maladies neuromusculaires et de la rétine, Université de Nantes (UN)-Institut National de la Santé et de la Recherche Médicale (INSERM), Physiopathologie Animale et bioThérapie du muscle et du système nerveux (PAnTher), Institut National de la Recherche Agronomique (INRA)-École nationale vétérinaire, agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS), Royal Holloway, University of London, Laboratoire de Résonance Magnétique Nucléaire (LRMN), Modélisation thérapeutique en neurologie: myologie et biothérapies des myopathies canines, Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12), Chercheur indépendant, Centre Hospitalier Vétérinaire Atlantia, Service de Cardiologie [CHU Cochin], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpital Cochin [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), CHU Saint-Antoine [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Laboratoire des Sciences de l'Information et des Systèmes (LSIS), Aix Marseille Université (AMU)-Université de Toulon (UTLN)-Arts et Métiers Paristech ENSAM Aix-en-Provence-Centre National de la Recherche Scientifique (CNRS), Approches génétiques intégrées et nouvelles thérapies pour les maladies rares (INTEGRARE), École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Évry-Val-d'Essonne (UEVE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Généthon, University of Wolverhampton, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Thérapie des maladies du muscle strié, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), UMR1089, Laboratoire de Thérapie Génique, Université de Nantes (UN), Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Association française contre les myopathies (AFM-Téléthon)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Association française contre les myopathies (AFM-Téléthon)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Pierre et Marie Curie - Paris 6 (UPMC), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS), Service de Cardiologie [CHU Saint-Antoine], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Centre National de la Recherche Scientifique (CNRS)-Arts et Métiers Paristech ENSAM Aix-en-Provence-Université de Toulon (UTLN)-Aix Marseille Université (AMU), École pratique des hautes études (EPHE), Laboratoire RMN, Institut de Myologie, Commissariat à l'énergie atomique et aux énergies alternatives (CEA), Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC), Centre de recherche en myologie, Université Pierre et Marie Curie - Paris 6 (UPMC)-Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Université Pierre et Marie Curie - Paris 6 (UPMC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), UMR 1089, Atlantic Gene Therapies, Développement et Pathologie du Tissu Musculaire (DPTM), Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Vétérinaire de Nantes, Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-CHU Cochin [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-CHU Saint-Antoine [APHP], Association française contre les myopathies (AFM-Téléthon), École pratique des hautes études (EPHE)-Université d'Évry-Val-d'Essonne (UEVE)-GENETHON 3-Institut National de la Santé et de la Recherche Médicale (INSERM), UMR 1089, Atlantic Gene Therapies & Genethon, Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Association française contre les myopathies (AFM-Téléthon)-Université Pierre et Marie Curie - Paris 6 (UPMC), Recherche et développement [Généthon, Evry] (R & D Généthon), Généthon [Evry], Hôpital Cochin [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Université d'Évry-Val-d'Essonne (UEVE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Généthon-École pratique des hautes études (EPHE), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)

Subjects
0301 basic medicine, Male, myopathie de duchenne, Duchenne muscular dystrophy, Genetic enhancement, medicine.medical_treatment, General Physics and Astronomy, Bioinformatics, Dystrophin, Muscular Dystrophy, Vector (molecular biology), Transgenes, Muscular dystrophy, Multidisciplinary, biology, Gene Transfer Techniques, Immunosuppression, Skeletal, Dependovirus, 3. Good health, thérapie génique, Administration, Muscle, Administration, Intravenous, Intravenous, ITGA7, musculoskeletal diseases, congenital, hereditary, and neonatal diseases and abnormalities, Neuromuscular disease, Science, Genetic Vectors, Animals, Disease Models, Animal, Dogs, Genetic Therapy, Muscle, Skeletal, Muscular Dystrophy, Animal, Muscular Dystrophy, Duchenne, General Biochemistry, Genetics and Molecular Biology, Article, 03 medical and health sciences, medicine, Animal, business.industry, [SDV.BBM.BM]Life Sciences [q-bio]/Biochemistry, Molecular Biology/Molecular biology, General Chemistry, Duchenne, medicine.disease, 030104 developmental biology, Disease Models, biology.protein, business
Abstract

Duchenne muscular dystrophy (DMD) is an incurable X-linked muscle-wasting disease caused by mutations in the dystrophin gene. Gene therapy using highly functional microdystrophin genes and recombinant adeno-associated virus (rAAV) vectors is an attractive strategy to treat DMD. Here we show that locoregional and systemic delivery of a rAAV2/8 vector expressing a canine microdystrophin (cMD1) is effective in restoring dystrophin expression and stabilizing clinical symptoms in studies performed on a total of 12 treated golden retriever muscular dystrophy (GRMD) dogs. Locoregional delivery induces high levels of microdystrophin expression in limb musculature and significant amelioration of histological and functional parameters. Systemic intravenous administration without immunosuppression results in significant and sustained levels of microdystrophin in skeletal muscles and reduces dystrophic symptoms for over 2 years. No toxicity or adverse immune consequences of vector administration are observed. These studies indicate safety and efficacy of systemic rAAV-cMD1 delivery in a large animal model of DMD, and pave the way towards clinical trials of rAAV–microdystrophin gene therapy in DMD patients., Duchenne muscular dystrophy is a progressive degenerative disease of muscles caused by mutations in the dystrophin gene. Here the authors use AAV vectors to deliver microdystrophin to dogs with muscular dystrophy, and show restoration of dystrophin expression and reduction of symptoms up to 26 months of age.

Published
2017
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8. Adeno-associated virus vector (AAV) microdystrophin gene therapy prolongs survival and restores muscle function in the canine model of Duchenne muscular dystrophy (DMD)

Author

L. Servais, Takis Athanasopoulos, Oumeya Adjali, F Mingozzi, George Dickson, J.Y. Hogrel, Yan Cherel, Pierre G. Carlier, Marie Montus, Taeyoung Koo, T. Voit, Sophie Moullec, Fulvio Mavilio, Philippe Moullier, Bernard Gjata, F. Bodvael, C. Le Guiner, Carole Masurier, Généthon, UMR 1089, Atlantic Gene Therapies, Institut National de la Santé et de la Recherche Médicale (INSERM), Service of Clinical Trials and Databases, Institut de Myologie, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Neuromuscular Physiology and Evaluation Laboratory, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), AIM, Atlantic Gene Therapies, Royal Holloway [University of London] (RHUL), University of Wolverhampton, Physiopathologie Animale et bioThérapie du muscle et du système nerveux (PAnTher), Institut National de la Recherche Agronomique (INRA)-École nationale vétérinaire, agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS), CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU), Université Paris Cité (UPCité), University of Florida [Gainesville] (UF), World Muscle Society (WMS). London, INT., Institut National de la Recherche Agronomique (INRA)-Ecole Nationale Vétérinaire, Agroalimentaire et de l'alimentation Nantes-Atlantique (ONIRIS), Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), and Université de Paris (UP)

Subjects
0303 health sciences, business.industry, Genetic enhancement, Duchenne muscular dystrophy, medicine.disease_cause, medicine.disease, 3. Good health, 03 medical and health sciences, 0302 clinical medicine, Neurology, 030220 oncology & carcinogenesis, Pediatrics, Perinatology and Child Health, medicine, Cancer research, Neurology (clinical), Vector (molecular biology), business, Adeno-associated virus, Canine model, Genetics (clinical), Function (biology), [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology, 030304 developmental biology
Abstract

International audience; Duchenne muscular dystrophy (DMD) is an X-linked inherited muscle-wasting disease primarily affecting young boys with a prevalence of 1:5000. The disease is caused by loss-of-function mutations in the gene encoding for the Dystrophin protein and is characterised by systemic, progressive, irreversible and severe loss of muscle function. Among vector systems that allow efficient in vivo gene transfer, recombinant Adeno Associated Virus vectors (rAAV) hold great promise and result in particular in very efficient transduction of skeletal and cardiac muscles.

Published
2015
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9. Longitudinal in vivo muscle function analysis of the DMSXL mouse model of myotonic dystrophy type 1

Author

Geneviève Gourdon, Pierre G. Carlier, Bernard Gjata, Alban Vignaud, Isabelle Ledoux, B. Matot, Aline Huguet, Emilie Bertil, Valérie Decostre, Jean-Yves Hogrel, Immunologie moléculaire et biothérapies innovantes (IMBI), École Pratique des Hautes Études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université d'Évry-Val-d'Essonne (UEVE)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Généthon, Biogéochimie et écologie des milieux continentaux (Bioemco), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Photonique Quantique et Moléculaire (LPQM), École normale supérieure - Cachan (ENS Cachan)-CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Institut de biologie et chimie des protéines [Lyon] (IBCP), Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Généthon, Institut de Myologie, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Laboratoire de physiologie et d'évaluation neuromusculaire, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Association française contre les myopathies (AFM-Téléthon)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Généthon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université d'Évry-Val-d'Essonne (UEVE)-École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Institut National de la Recherche Agronomique (INRA)-Université Pierre et Marie Curie - Paris 6 (UPMC)-AgroParisTech-Centre National de la Recherche Scientifique (CNRS), and Centre National de la Recherche Scientifique (CNRS)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Association française contre les myopathies (AFM-Téléthon)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Association française contre les myopathies (AFM-Téléthon)-Sorbonne Université (SU)

Subjects
Pathology, medicine.medical_specialty, [SDV]Life Sciences [q-bio], Muscle Fibers, Skeletal, Mice, Transgenic, Muscle Strength Dynamometer, Protein Serine-Threonine Kinases, Myotonic dystrophy, Mice, 03 medical and health sciences, 0302 clinical medicine, In vivo, medicine, Animals, Humans, Myotonic Dystrophy, Longitudinal Studies, Muscle, Skeletal, Genetics (clinical), 030304 developmental biology, Analysis of Variance, 0303 health sciences, medicine.diagnostic_test, Muscle fatigue, business.industry, Body Weight, Age Factors, Skeletal muscle, Magnetic resonance imaging, Anatomy, medicine.disease, Myotonia, Magnetic Resonance Imaging, Hindlimb, Function analysis, Disease Models, Animal, medicine.anatomical_structure, Neurology, Pediatrics, Perinatology and Child Health, Neurology (clinical), Ankle, Trinucleotide Repeat Expansion, business, 030217 neurology & neurosurgery
Abstract

International audience; Myotonic dystrophy is the most common adult muscle dystrophy. In view of emerging therapies, which use animal models as a proof of principle, the development of reliable outcome measures for in vivo longitudinal study of mouse skeletal muscle function is becoming crucial. To satisfy this need, we have developed a device to measure ankle dorsi- and plantarflexion torque in rodents. We present an in vivo 8-month longitudinal study of the contractile properties of the skeletal muscles of the DMSXL mouse model of myotonic dystrophy type 1. Between 4 and 12months of age, we observed a reduction in muscle strength in the ankle dorsi- and plantarflexors of DMSXL compared to control mice although the strength per muscle cross-section was normal. Mild steady myotonia but no abnormal muscle fatigue was also observed in the DMSXL mice. Magnetic resonance imaging and histological analysis performed at the end of the study showed respectively reduced muscle cross-section area and smaller muscle fibre diameter in DMSXL mice. In conclusion, our study demonstrates the feasibility of carrying out longitudinal in vivo studies of muscle function over several months in a mouse model of myotonic dystrophy confirming the feasibility of this method to test preclinical therapeutics.

Published
2013
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