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Koeberl DD, Koch RL, Lim JA, Brooks ED, Arnson BD, Sun B, Kishnani PS. Gene therapy for glycogen storage diseases. J Inherit Metab Dis 2024; 47:93-118. [PMID: 37421310 PMCID: PMC10874648 DOI: 10.1002/jimd.12654] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 05/24/2023] [Accepted: 07/05/2023] [Indexed: 07/10/2023]
Abstract
Glycogen storage disorders (GSDs) are inherited disorders of metabolism resulting from the deficiency of individual enzymes involved in the synthesis, transport, and degradation of glycogen. This literature review summarizes the development of gene therapy for the GSDs. The abnormal accumulation of glycogen and deficiency of glucose production in GSDs lead to unique symptoms based upon the enzyme step and tissues involved, such as liver and kidney involvement associated with severe hypoglycemia during fasting and the risk of long-term complications including hepatic adenoma/carcinoma and end stage kidney disease in GSD Ia from glucose-6-phosphatase deficiency, and cardiac/skeletal/smooth muscle involvement associated with myopathy +/- cardiomyopathy and the risk for cardiorespiratory failure in Pompe disease. These symptoms are present to a variable degree in animal models for the GSDs, which have been utilized to evaluate new therapies including gene therapy and genome editing. Gene therapy for Pompe disease and GSD Ia has progressed to Phase I and Phase III clinical trials, respectively, and are evaluating the safety and bioactivity of adeno-associated virus vectors. Clinical research to understand the natural history and progression of the GSDs provides invaluable outcome measures that serve as endpoints to evaluate benefits in clinical trials. While promising, gene therapy and genome editing face challenges with regard to clinical implementation, including immune responses and toxicities that have been revealed during clinical trials of gene therapy that are underway. Gene therapy for the glycogen storage diseases is under development, addressing an unmet need for specific, stable therapy for these conditions.
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Affiliation(s)
- Dwight D. Koeberl
- Division of Medical Genetics, Department of Pediatrics, Duke University Medical School, Durham, NC, United States
- Department of Molecular Genetics & Microbiology, Duke University Medical Center, Durham, NC, United States
| | - Rebecca L. Koch
- Division of Medical Genetics, Department of Pediatrics, Duke University Medical School, Durham, NC, United States
| | - Jeong-A Lim
- Division of Medical Genetics, Department of Pediatrics, Duke University Medical School, Durham, NC, United States
| | - Elizabeth D. Brooks
- Division of Medical Genetics, Department of Pediatrics, Duke University Medical School, Durham, NC, United States
| | - Benjamin D. Arnson
- Department of Molecular Genetics & Microbiology, Duke University Medical Center, Durham, NC, United States
| | - Baodong Sun
- Division of Medical Genetics, Department of Pediatrics, Duke University Medical School, Durham, NC, United States
| | - Priya S. Kishnani
- Division of Medical Genetics, Department of Pediatrics, Duke University Medical School, Durham, NC, United States
- Department of Molecular Genetics & Microbiology, Duke University Medical Center, Durham, NC, United States
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Lubbe C, Meyer LCR, Kohn TA, Harvey BH, Wolmarans DW. The pathophysiology of rhabdomyolysis in ungulates and rats: towards the development of a rodent model of capture myopathy. Vet Res Commun 2023; 47:361-371. [PMID: 36334218 DOI: 10.1007/s11259-022-10030-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2022] [Accepted: 10/20/2022] [Indexed: 11/08/2022]
Abstract
Capture myopathy (CM), which is associated with the capture and translocation of wildlife, is a life-threatening condition that causes noteworthy morbidity and mortality in captured animals. Such wildlife deaths have a significant impact on nature conservation efforts and the socio-economic wellbeing of communities reliant on ecotourism. Several strategies are used to minimise the adverse consequences associated with wildlife capture, especially in ungulates, but no successful preventative or curative measures have yet been developed. The primary cause of death in wild animals diagnosed with CM stems from kidney or multiple organ failure as secondary complications to capture-induced rhabdomyolysis. Ergo, the development of accurate and robust model frameworks is vital to improve our understanding of CM. Still, since CM-related complications are borne from biological and behavioural factors that may be unique to wildlife, e.g. skeletal muscle architecture or flighty nature, certain differences between the physiology and stress responses of wildlife and rodents need consideration in such endeavours. Therefore, the purpose of this review is to summarise some of the major etiological and pathological mechanisms of the condition as it is observed in wildlife and what is currently known of CM-like syndromes, i.e. rhabdomyolysis, in laboratory rats. Additionally, we will highlight some key aspects for consideration in the development and application of potential future rodent models.
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Affiliation(s)
- Crystal Lubbe
- Center of Excellence for Pharmaceutical Sciences, Faculty of Health Sciences, North-West University, Potchefstroom, 2520, South Africa
| | - Leith C R Meyer
- Center for Veterinary Wildlife Research and Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
| | - Tertius A Kohn
- Center for Veterinary Wildlife Research and Department of Paraclinical Sciences, Faculty of Veterinary Science, University of Pretoria, Pretoria, South Africa
- Department of Medical Bioscience, Faculty of Natural Sciences, University of the Western Cape, Western Cape, South Africa
| | - Brian H Harvey
- Center of Excellence for Pharmaceutical Sciences, Faculty of Health Sciences, North-West University, Potchefstroom, 2520, South Africa
- South African Medical Research Council Unit On Risk and Resilience in Mental Disorders, Department of Psychiatry and Neuroscience Institute, University of Cape Town, Western Cape, South Africa
| | - De Wet Wolmarans
- Center of Excellence for Pharmaceutical Sciences, Faculty of Health Sciences, North-West University, Potchefstroom, 2520, South Africa.
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Watkins B, Schultheiß J, Rafuna A, Hintze S, Meinke P, Schoser B, Kröger S. Degeneration of muscle spindles in a murine model of Pompe disease. Sci Rep 2023; 13:6555. [PMID: 37085544 PMCID: PMC10121695 DOI: 10.1038/s41598-023-33543-y] [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: 10/11/2022] [Accepted: 04/14/2023] [Indexed: 04/23/2023] Open
Abstract
Pompe disease is a debilitating medical condition caused by a functional deficiency of lysosomal acid alpha-glucosidase (GAA). In addition to muscle weakness, people living with Pompe disease experience motor coordination deficits including an instable gait and posture. We reasoned that an impaired muscle spindle function might contribute to these deficiencies and therefore analyzed proprioception as well as muscle spindle structure and function in 4- and 8-month-old Gaa-/- mice. Gait analyses showed a reduced inter-limb and inter-paw coordination in Gaa-/- mice. Electrophysiological analyses of single-unit muscle spindle proprioceptive afferents revealed an impaired sensitivity of the dynamic and static component of the stretch response. Finally, a progressive degeneration of the sensory neuron and of the intrafusal fibers was detectable in Gaa-/- mice. We observed an increased abundance and size of lysosomes, a fragmentation of the inner and outer connective tissue capsule and a buildup of autophagic vacuoles in muscle spindles from 8-month-old Gaa-/- mice, indicating lysosomal defects and an impaired autophagocytosis. These results demonstrate a structural and functional degeneration of muscle spindles and an altered motor coordination in Gaa-/- mice. Similar changes could contribute to the impaired motor coordination in patients living with Pompe disease.
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Affiliation(s)
- Bridgette Watkins
- Department of Physiological Genomics, Biomedical Center, Ludwig-Maximilians-University, Grosshaderner Strasse 9, 82152, Planegg-Martinsried, Germany
| | - Jürgen Schultheiß
- Department of Physiological Genomics, Biomedical Center, Ludwig-Maximilians-University, Grosshaderner Strasse 9, 82152, Planegg-Martinsried, Germany
| | - Andi Rafuna
- Department of Physiological Genomics, Biomedical Center, Ludwig-Maximilians-University, Grosshaderner Strasse 9, 82152, Planegg-Martinsried, Germany
| | - Stefan Hintze
- Department of Neurology, Friedrich-Baur-Institute, LMU Klinikum, Ludwig-Maximilians-University, Munich, Germany
| | - Peter Meinke
- Department of Neurology, Friedrich-Baur-Institute, LMU Klinikum, Ludwig-Maximilians-University, Munich, Germany
| | - Benedikt Schoser
- Department of Neurology, Friedrich-Baur-Institute, LMU Klinikum, Ludwig-Maximilians-University, Munich, Germany
| | - Stephan Kröger
- Department of Physiological Genomics, Biomedical Center, Ludwig-Maximilians-University, Grosshaderner Strasse 9, 82152, Planegg-Martinsried, Germany.
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AAV vectors applied to the treatment of CNS disorders: Clinical status and challenges. J Control Release 2023; 355:458-473. [PMID: 36736907 DOI: 10.1016/j.jconrel.2023.01.067] [Citation(s) in RCA: 24] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2022] [Revised: 01/26/2023] [Accepted: 01/27/2023] [Indexed: 02/05/2023]
Abstract
In recent years, adeno-associated virus (AAV) has become the most important vector for central nervous system (CNS) gene therapy. AAV has already shown promising results in the clinic, for several CNS diseases that cannot be treated with drugs, including neurodegenerative diseases, neuromuscular diseases, and lysosomal storage disorders. Currently, three of the four commercially available AAV-based drugs focus on neurological disorders, including Upstaza for aromatic l-amino acid decarboxylase deficiency, Luxturna for hereditary retinal dystrophy, and Zolgensma for spinal muscular atrophy. All these studies have provided paradigms for AAV-based therapeutic intervention platforms. AAV gene therapy, with its dual promise of targeting disease etiology and enabling 'long-term correction' of disease processes, has the advantages of immune privilege, high delivery efficiency, tissue specificity, and cell tropism in the CNS. Although AAV-based gene therapy has been shown to be effective in most CNS clinical trials, limitations have been observed in its clinical applications, which are often associated with side effects. In this review, we summarized the therapeutic progress, challenges, limitations, and solutions for AAV-based gene therapy in 14 types of CNS diseases. We focused on viral vector technologies, delivery routes, immunosuppression, and other relevant clinical factors. We also attempted to integrate several hurdles faced in clinical and preclinical studies with their solutions, to seek the best path forward for the application of AAV-based gene therapy in the context of CNS diseases. We hope that these thoughtful recommendations will contribute to the efficient translation of preclinical studies and wide application of clinical trials.
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Neumann GB, Korkuć P, Arends D, Wolf MJ, May K, König S, Brockmann GA. Genomic diversity and relationship analyses of endangered German Black Pied cattle (DSN) to 68 other taurine breeds based on whole-genome sequencing. Front Genet 2023; 13:993959. [PMID: 36712857 PMCID: PMC9875303 DOI: 10.3389/fgene.2022.993959] [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: 07/14/2022] [Accepted: 11/28/2022] [Indexed: 01/05/2023] Open
Abstract
German Black Pied cattle (Deutsches Schwarzbuntes Niederungsrind, DSN) are an endangered dual-purpose cattle breed originating from the North Sea region. The population comprises about 2,500 cattle and is considered one of the ancestral populations of the modern Holstein breed. The current study aimed at defining the breeds closest related to DSN cattle, characterizing their genomic diversity and inbreeding. In addition, the detection of selection signatures between DSN and Holstein was a goal. Relationship analyses using fixation index (FST), phylogenetic, and admixture analyses were performed between DSN and 68 other breeds from the 1000 Bull Genomes Project. Nucleotide diversity, observed heterozygosity, and expected heterozygosity were calculated as metrics for genomic diversity. Inbreeding was measured as excess of homozygosity (FHom) and genomic inbreeding (FRoH) through runs of homozygosity (RoHs). Region-wide FST and cross-population-extended haplotype homozygosity (XP-EHH) between DSN and Holstein were used to detect selection signatures between the two breeds, and RoH islands were used to detect selection signatures within DSN and Holstein. DSN showed a close genetic relationship with breeds from the Netherlands, Belgium, Northern Germany, and Scandinavia, such as Dutch Friesian Red, Dutch Improved Red, Belgian Red White Campine, Red White Dual Purpose, Modern Angler, Modern Danish Red, and Holstein. The nucleotide diversity in DSN (0.151%) was higher than in Holstein (0.147%) and other breeds, e.g., Norwegian Red (0.149%), Red White Dual Purpose (0.149%), Swedish Red (0.149%), Hereford (0.145%), Angus (0.143%), and Jersey (0.136%). The FHom and FRoH values in DSN were among the lowest. Regions with high FST between DSN and Holstein, significant XP-EHH regions, and RoH islands detected in both breeds harbor candidate genes that were previously reported for milk, meat, fertility, production, and health traits, including one QTL detected in DSN for endoparasite infection resistance. The selection signatures between DSN and Holstein provide evidence of regions responsible for the dual-purpose properties of DSN and the milk type of Holstein. Despite the small population size, DSN has a high level of diversity and low inbreeding. FST supports its relatedness to breeds from the same geographic origin and provides information on potential gene pools that could be used to maintain diversity in DSN.
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Affiliation(s)
- Guilherme B. Neumann
- Animal Breeding Biology and Molecular Genetics, Albrecht Daniel Thaer-Institute for Agricultural and Horticultural Sciences, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Paula Korkuć
- Animal Breeding Biology and Molecular Genetics, Albrecht Daniel Thaer-Institute for Agricultural and Horticultural Sciences, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Danny Arends
- Animal Breeding Biology and Molecular Genetics, Albrecht Daniel Thaer-Institute for Agricultural and Horticultural Sciences, Humboldt-Universität zu Berlin, Berlin, Germany,Department of Applied Sciences, Northumbria University, Newcastle Upon Tyne, United Kingdom
| | - Manuel J. Wolf
- Institute of Animal Breeding and Genetics, Justus-Liebig-Universität, Giessen, Germany
| | - Katharina May
- Institute of Animal Breeding and Genetics, Justus-Liebig-Universität, Giessen, Germany
| | - Sven König
- Institute of Animal Breeding and Genetics, Justus-Liebig-Universität, Giessen, Germany
| | - Gudrun A. Brockmann
- Animal Breeding Biology and Molecular Genetics, Albrecht Daniel Thaer-Institute for Agricultural and Horticultural Sciences, Humboldt-Universität zu Berlin, Berlin, Germany,*Correspondence: Gudrun A. Brockmann,
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Valberg SJ, Williams ZJ, Finno CJ, Schultz A, Velez‐Irizarry D, Henry ML, Gardner K, Petersen JL. Type 2 polysaccharide storage myopathy in Quarter Horses is a novel glycogen storage disease causing exertional rhabdomyolysis. Equine Vet J 2022. [DOI: 10.1111/evj.13876] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Accepted: 08/11/2022] [Indexed: 11/28/2022]
Affiliation(s)
- Stephanie J. Valberg
- Michigan State University, Large Animal Clinical Sciences College of Veterinary Medicine East Lansing MI USA
| | - Zoë J. Williams
- Michigan State University, Large Animal Clinical Sciences College of Veterinary Medicine East Lansing MI USA
| | - Carrie J. Finno
- University of California‐Davis, Department of Population Health and Reproduction, School of Veterinary Medicine Davis CA USA
| | - Abigail Schultz
- Michigan State University, Large Animal Clinical Sciences College of Veterinary Medicine East Lansing MI USA
| | - Deborah Velez‐Irizarry
- Michigan State University, Large Animal Clinical Sciences College of Veterinary Medicine East Lansing MI USA
| | - Marisa L. Henry
- Michigan State University, Large Animal Clinical Sciences College of Veterinary Medicine East Lansing MI USA
| | - Keri Gardner
- Michigan State University, Large Animal Clinical Sciences College of Veterinary Medicine East Lansing MI USA
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A century of exercise physiology: key concepts in regulation of glycogen metabolism in skeletal muscle. Eur J Appl Physiol 2022; 122:1751-1772. [PMID: 35355125 PMCID: PMC9287217 DOI: 10.1007/s00421-022-04935-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 03/15/2022] [Indexed: 01/20/2023]
Abstract
Glycogen is a branched, glucose polymer and the storage form of glucose in cells. Glycogen has traditionally been viewed as a key substrate for muscle ATP production during conditions of high energy demand and considered to be limiting for work capacity and force generation under defined conditions. Glycogenolysis is catalyzed by phosphorylase, while glycogenesis is catalyzed by glycogen synthase. For many years, it was believed that a primer was required for de novo glycogen synthesis and the protein considered responsible for this process was ultimately discovered and named glycogenin. However, the subsequent observation of glycogen storage in the absence of functional glycogenin raises questions about the true role of the protein. In resting muscle, phosphorylase is generally considered to be present in two forms: non-phosphorylated and inactive (phosphorylase b) and phosphorylated and constitutively active (phosphorylase a). Initially, it was believed that activation of phosphorylase during intense muscle contraction was primarily accounted for by phosphorylation of phosphorylase b (activated by increases in AMP) to a, and that glycogen synthesis during recovery from exercise occurred solely through mechanisms controlled by glucose transport and glycogen synthase. However, it now appears that these views require modifications. Moreover, the traditional roles of glycogen in muscle function have been extended in recent years and in some instances, the original concepts have undergone revision. Thus, despite the extensive amount of knowledge accrued during the past 100 years, several critical questions remain regarding the regulation of glycogen metabolism and its role in living muscle.
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Musumeci O, Pugliese A, Oteri R, Volta S, Ciranni A, Moggio M, Rodolico C, Toscano A. A new phenotype of muscle glycogen synthase deficiency (GSD0B) characterized by an adult onset myopathy without cardiomyopathy. Neuromuscul Disord 2022; 32:582-589. [DOI: 10.1016/j.nmd.2022.03.008] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2021] [Revised: 03/23/2022] [Accepted: 03/25/2022] [Indexed: 11/26/2022]
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9
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Li Z, Guo J, Jia K, Zheng Z, Chen X, Bai Z, Yang Y, Chen B, Yuan W, Chen W, Yang J. Oxyfluorfen induces hepatotoxicity through lipo-sugar accumulation and inflammation in zebrafish (Danio rerio). ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 230:113140. [PMID: 34979306 DOI: 10.1016/j.ecoenv.2021.113140] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/03/2021] [Revised: 12/06/2021] [Accepted: 12/27/2021] [Indexed: 06/14/2023]
Abstract
Oxyfluorfen (OXY) is widely used in agriculture as a herbicide, resulting in its continuous accumulation in the environment. The presence of OXY can be detected in soil and rivers. However, until now, the potential toxicity of OXY to aquatic organisms has not been evaluated. In this study, zebrafish was used as a model animal to evaluate OXY-induced liver toxicity. The study found that 0.25, 0.5, and 1 mg/L of OXY affected the early development of zebrafish and severely damaged the lipid and sugar metabolism in the liver of zebrafish larvae. Furthermore, a metabolic function disorder caused liver damage. OXY also caused inflammation by upregulating the inflammatory factors IL-6, IL-8, and TNF-α, and activated the apoptotic pathway to inhibit hepatocyte proliferation, resulting in zebrafish liver toxicity. Our research showed that OXY had certain toxic effects on zebrafish development and liver and could cause potential harm to other aquatic organisms and humans.
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Affiliation(s)
- Zekun Li
- Department of Endodontics, Affiliated Stomatological Hospital, Nanchang University, Nanchang 330006, Jiangxi, China; Jiangxi Key Laboratory of Oral Biomedicine, Nanchang 330006, Jiangxi, China
| | - Jun Guo
- Department of Endodontics, Affiliated Stomatological Hospital, Nanchang University, Nanchang 330006, Jiangxi, China; Jiangxi Key Laboratory of Oral Biomedicine, Nanchang 330006, Jiangxi, China
| | - Kun Jia
- Department of Bioscience, College of Life Science, Nanchang University, Nanchang 30031, Jiangxi, China; Center for Drug Screening and Research, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou 341000, Jiangxi, China
| | - Zhiguo Zheng
- Department of Endodontics, Affiliated Stomatological Hospital, Nanchang University, Nanchang 330006, Jiangxi, China; Jiangxi Key Laboratory of Oral Biomedicine, Nanchang 330006, Jiangxi, China
| | - Xiaomei Chen
- Department of Endodontics, Affiliated Stomatological Hospital, Nanchang University, Nanchang 330006, Jiangxi, China; Jiangxi Key Laboratory of Oral Biomedicine, Nanchang 330006, Jiangxi, China
| | - Zhonghui Bai
- Center for Drug Screening and Research, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou 341000, Jiangxi, China
| | - Yuhao Yang
- Department of Endodontics, Affiliated Stomatological Hospital, Nanchang University, Nanchang 330006, Jiangxi, China; Jiangxi Key Laboratory of Oral Biomedicine, Nanchang 330006, Jiangxi, China
| | - Bo Chen
- Center for Drug Screening and Research, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou 341000, Jiangxi, China
| | - Wei Yuan
- Center for Drug Screening and Research, School of Geography and Environmental Engineering, Gannan Normal University, Ganzhou 341000, Jiangxi, China
| | - Weihua Chen
- Department of Oral Pathology, Affiliated Stomatological Hospital, Nanchang University, Nanchang 330006, Jiangxi, China; Jiangxi Key Laboratory of Oral Biomedicine, Nanchang 330006, Jiangxi, China.
| | - Jian Yang
- Department of Endodontics, Affiliated Stomatological Hospital, Nanchang University, Nanchang 330006, Jiangxi, China; Jiangxi Key Laboratory of Oral Biomedicine, Nanchang 330006, Jiangxi, China.
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Preclinical Research in McArdle Disease: A Review of Research Models and Therapeutic Strategies. Genes (Basel) 2021; 13:genes13010074. [PMID: 35052414 PMCID: PMC8774685 DOI: 10.3390/genes13010074] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2021] [Revised: 12/22/2021] [Accepted: 12/23/2021] [Indexed: 02/06/2023] Open
Abstract
McArdle disease is an autosomal recessive disorder of muscle glycogen metabolism caused by pathogenic mutations in the PYGM gene, which encodes the skeletal muscle-specific isoform of glycogen phosphorylase. Clinical symptoms are mainly characterized by transient acute “crises” of early fatigue, myalgia and contractures, which can be accompanied by rhabdomyolysis. Owing to the difficulty of performing mechanistic studies in patients that often rely on invasive techniques, preclinical models have been used for decades, thereby contributing to gain insight into the pathophysiology and pathobiology of human diseases. In the present work, we describe the existing in vitro and in vivo preclinical models for McArdle disease and review the insights these models have provided. In addition, despite presenting some differences with the typical patient’s phenotype, these models allow for a deep study of the different features of the disease while representing a necessary preclinical step to assess the efficacy and safety of possible treatments before they are tested in patients.
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Christen M, Reineking W, Beineke A, Jagannathan V, Baumgärtner W, Leeb T. Polyadenine insertion disrupting the G6PC1 gene in German Pinschers with glycogen storage disease type Ia (GSD1A). Anim Genet 2021; 52:900-902. [PMID: 34610166 PMCID: PMC9293233 DOI: 10.1111/age.13146] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/24/2021] [Indexed: 11/30/2022]
Affiliation(s)
- Matthias Christen
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, 3001, Switzerland
| | - Wencke Reineking
- Department of Pathology, University of Veterinary Medicine, Hannover, 30559, Germany
| | - Andreas Beineke
- Department of Pathology, University of Veterinary Medicine, Hannover, 30559, Germany
| | - Vidhya Jagannathan
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, 3001, Switzerland
| | - Wolfgang Baumgärtner
- Department of Pathology, University of Veterinary Medicine, Hannover, 30559, Germany
| | - Tosso Leeb
- Institute of Genetics, Vetsuisse Faculty, University of Bern, Bern, 3001, Switzerland
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Migocka-Patrzałek M, Elias M. Muscle Glycogen Phosphorylase and Its Functional Partners in Health and Disease. Cells 2021; 10:cells10040883. [PMID: 33924466 PMCID: PMC8070155 DOI: 10.3390/cells10040883] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2021] [Revised: 04/09/2021] [Accepted: 04/11/2021] [Indexed: 02/07/2023] Open
Abstract
Glycogen phosphorylase (PG) is a key enzyme taking part in the first step of glycogenolysis. Muscle glycogen phosphorylase (PYGM) differs from other PG isoforms in expression pattern and biochemical properties. The main role of PYGM is providing sufficient energy for muscle contraction. However, it is expressed in tissues other than muscle, such as the brain, lymphoid tissues, and blood. PYGM is important not only in glycogen metabolism, but also in such diverse processes as the insulin and glucagon signaling pathway, insulin resistance, necroptosis, immune response, and phototransduction. PYGM is implicated in several pathological states, such as muscle glycogen phosphorylase deficiency (McArdle disease), schizophrenia, and cancer. Here we attempt to analyze the available data regarding the protein partners of PYGM to shed light on its possible interactions and functions. We also underline the potential for zebrafish to become a convenient and applicable model to study PYGM functions, especially because of its unique features that can complement data obtained from other approaches.
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Peristeri E, Dardiotis E. Editorial for Special Issue "Genetic Basis and Epidemiology of Myopathies". Int J Mol Sci 2021; 22:ijms22042152. [PMID: 33671495 PMCID: PMC7926838 DOI: 10.3390/ijms22042152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2021] [Revised: 02/19/2021] [Accepted: 02/19/2021] [Indexed: 11/16/2022] Open
Abstract
We are pleased to announce a Special Issue on the Genetic Basis and Epidemiology of Myopathies. This Special Issue is collecting papers pertaining to various lines of research focusing on the genetic basis and the epidemiology of myopathies. The Guest Editors' note combines the contributing authors' reviews and findings of relevant research, and we hope that future studies on myopathies will attempt to confirm these findings and, additionally, evaluate supplementary phenotypic and histological expressions of myopathies, as well as genetic factors in their pathogenesis.
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