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Glycogen Storage Disorder

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https://www.readbyqxmd.com/read/30535597/cellular-metabolism-at-a-glance
#1
Inês Mesquita, Fernando Rodrigues
Metabolism is highly coordinated component of the cellular activity that involves sequential chemical transformations, within a so-called metabolic network. Through these coordinated actions, living organisms acquire energy and biosynthetic precursors to maintain cellular homeostasis and function. Metabolism relies on the breaking down of macromolecules to produce energy [catabolism] and/or intermediary metabolites that are then used to construct essential building blocks for macromolecule production [anabolism]...
2018: Experientia. Supplementum
https://www.readbyqxmd.com/read/30521848/novel-metabolic-disorders-in-skeletal-muscle-of-lipodystrophic-bscl2-seipin-deficient-mice
#2
Wenqiong Xu, Hongyi Zhou, Hongzhuan Xuan, Pradip Saha, Gongxian Wang, Weiqin Chen
Bscl2-/- mice recapitulate many of the major metabolic manifestations in Berardinelli-Seip congenital lipodystrophy type 2 (BSCL2) individuals, including lipodystrophy, hepatosteatosis, muscular hypertrophy, and insulin resistance. Metabolic defects in Bscl2-/- mice with regard to glucose and lipid metabolism in skeletal muscle have never been investigated. Here, we identified Bscl2-/- mice displayed reduced intramyocellular triglyceride (IMTG) content but increased glycogen storage predominantly in oxidative type I soleus muscle (SM)...
December 4, 2018: Molecular and Cellular Endocrinology
https://www.readbyqxmd.com/read/30461220/lack-of-muscle-mtor-kinase-activity-causes-early-onset-myopathy-and-compromises-whole-body-homeostasis
#3
Qing Zhang, Agnès Duplany, Vincent Moncollin, Sandrine Mouradian, Evelyne Goillot, Laetitia Mazelin, Karine Gauthier, Nathalie Streichenberger, Céline Angleraux, Jie Chen, Shuzhe Ding, Laurent Schaeffer, Yann-Gaël Gangloff
BACKGROUND: The protein kinase mechanistic target of rapamycin (mTOR) controls cellular growth and metabolism. Although balanced mTOR signalling is required for proper muscle homeostasis, partial mTOR inhibition by rapamycin has beneficial effects on various muscle disorders and age-related pathologies. Besides, more potent mTOR inhibitors targeting mTOR catalytic activity have been developed and are in clinical trials. However, the physiological impact of loss of mTOR catalytic activity in skeletal muscle is currently unknown...
November 21, 2018: Journal of Cachexia, Sarcopenia and Muscle
https://www.readbyqxmd.com/read/30451720/neutropenia-in-glycogen-storage-disease-ib-outcomes-for-patients-treated-with-granulocyte-colony-stimulating-factor
#4
David C Dale, Audrey Anna Bolyard, Tracy Marrero, Merideth L Kelley, Vahagn Makaryan, Emily Tran, Jamie Leung, Laurence A Boxer, Priya S Kishnani, Stephanie Austin, Corbinian Wanner, Iris A Ferrecchia, Dina Khalaf, Dawn Maze, Joanne Kurtzberg, Cornelia Zeidler, Karl Welte, David A Weinstein
PURPOSE OF REVIEW: Glycogen storage disease Ib (GSD Ib) is characterized by hepatomegaly, hypoglycemia, neutropenia, enterocolitis and recurrent bacterial infections. It is attributable to mutations in G6PT1, the gene for the glucose-6-phosphate transporter responsible for transport of glucose into the endoplasmic reticulum. Neutropenia in GSD Ib is now frequently treated with granulocyte colony-stimulating factor (G-CSF). We formed a cooperative group to review outcomes of the long-term treatment of GSD Ib patients treated with G-CSF...
January 2019: Current Opinion in Hematology
https://www.readbyqxmd.com/read/30442292/cardiac-phenotypes-in-hereditary-muscle-disorders-jacc-state-of-the-art-review
#5
REVIEW
Eloisa Arbustini, Alessandro Di Toro, Lorenzo Giuliani, Valentina Favalli, Nupoor Narula, Maurizia Grasso
Hereditary muscular diseases commonly involve the heart. Cardiac manifestations encompass a spectrum of phenotypes, including both cardiomyopathies and rhythm disorders. Common biomarkers suggesting cardiomuscular diseases include increased circulating creatine kinase and/or lactic acid levels or disease-specific metabolic indicators. Cardiac and extra-cardiac traits, imaging tests, family studies, and genetic testing provide precise diagnoses. Cardiac phenotypes are mainly dilated and hypokinetic in dystrophinopathies, Emery-Dreifuss muscular dystrophies, and limb girdle muscular dystrophies; hypertrophic in Friedreich ataxia, mitochondrial diseases, glycogen storage diseases, and fatty acid oxidation disorders; and restrictive in myofibrillar myopathies...
November 13, 2018: Journal of the American College of Cardiology
https://www.readbyqxmd.com/read/30397902/myopathies-related-to-glycogen-metabolism-disorders
#6
REVIEW
Mark A Tarnopolsky
Most of the glycogen metabolism disorders that affect skeletal muscle involve enzymes in glycogenolysis (myophosphorylase (PYGM), glycogen debranching enzyme (AGL), phosphorylase b kinase (PHKB)) and glycolysis (phosphofructokinase (PFK), phosphoglycerate mutase (PGAM2), aldolase A (ALDOA), β-enolase (ENO3)); however, 3 involve glycogen synthesis (glycogenin-1 (GYG1), glycogen synthase (GSE), and branching enzyme (GBE1)). Many present with exercise-induced cramps and rhabdomyolysis with higher-intensity exercise (i...
November 5, 2018: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/30371346/post-mortem-diagnosis-of-pompe-disease-by-exome-sequencing-in-a-moroccan-family-a-case-report
#7
Najlae Adadi, Maryem Sahli, Grégory Egéa, Ilham Ratbi, Mohamed Taoudi, Layla Zniber, Wafaa Jdioui, Said El Mouatassim, Abdelaziz Sefiani
BACKGROUND: Pompe disease is an autosomal recessive lysosomal storage disorder characterized by progressive myopathy with proximal muscle weakness, respiratory muscle dysfunction, and cardiomyopathy. Its prevalence ranges between 1/9000 and 1/40,000. It is caused by compound heterozygous or homozygous mutations in the GAA gene, which encodes for the lysosomal enzyme alpha-glucosidase, required for the degrading of lysosomal glycogen. CASE PRESENTATION: In this study, we report the case of a Moroccan consanguineous family with hypertrophic cardiomyopathy and sudden cardiac deaths at an early age; our patient was a 7-month-old Moroccan girl...
October 29, 2018: Journal of Medical Case Reports
https://www.readbyqxmd.com/read/30345254/a-case-of-glycogen-storage-disease-iv-with-rare-homozygous-mutations-in-the-glycogen-branching-enzyme-gene
#8
So Yoon Choi, Ben Kang, Jae Young Choe, Yoon Lee, Hyo Jeong Jang, Hyung-Doo Park, Suk-Koo Lee, Yon Ho Choe
Glycogen storage disease (GSD) IV is a rare autosomal recessive inherited disorder caused by mutations in the gene coding for glycogen branching enzyme leading to progressive liver disease. GSD IV is associated with mutations in GBE1 , which encodes the glycogen branching enzyme. We report a case of GSD IV with rare homozygous mutations in the GBE1 gene (c.791G>A (p.Gly264Glu), which was successfully treated by liver transplantation.
October 2018: Pediatric Gastroenterology, Hepatology & Nutrition
https://www.readbyqxmd.com/read/30343140/role-of-autophagy-in-inherited-metabolic-and-endocrine-myopathies
#9
REVIEW
Ying Tan, Yan Gong, Maolong Dong, Zhaohui Pei, Jun Ren
The prevalence of cardiometabolic disease has reached an exponential rate of rise over the last decades owing to high fat/high caloric diet intake and satiety life style. Although the presence of dyslipidemia, insulin resistance, hypertension and obesity mainly contributes to the increased incidence of cardiometabolic diseases, population-based, clinical and genetic studies have revealed a rather important role for inherited myopathies and endocrine disorders in the ever-rising metabolic anomalies. Inherited metabolic and endocrine diseases such as glycogen storage and lysosomal disorders have greatly contributed to the overall prevalence of cardiometabolic diseases...
October 18, 2018: Biochimica et biophysica acta. Molecular basis of disease
https://www.readbyqxmd.com/read/30318896/liver-transplantation-in-patients-with-type-iiia-glycogen-storage-disease-cirrhosis-and-hepatocellular-carcinoma
#10
Elena Iglesias Jorquera, Paula Tomás Pujante, Gema Ruiz García, Ángel Manuel Vargas Acosta, José Antonio Pons Miñano
Type III glycogen storage disease (GSD-III) is an autosomal recessive disorder due to the deficiency of the glycogen debrancher enzyme. 80% of the patients have hepatic and muscular involvement (IIIa), compared to 15% with only liver involvement (IIIb). As the life expectancy improves in these patients, the possible liver complications are better understood.
October 15, 2018: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/30311141/case-of-neonatal-fatality-from-neuromuscular-variant-of-glycogen-storage-disease-type-iv
#11
Tavleen Sandhu, Michelle Polan, Zhongxin Yu, Rufei Lu, Abhishek Makkar
Glycogen storage disease type IV (GSD-IV), or Andersen disease, is a rare autosomal recessive disorder that results from the deficiency of glycogen branching enzyme (GBE). This in turn results in accumulation of abnormal glycogen molecules that have longer outer chains and fewer branch points. GSD-IV manifests in a wide spectrum, with variable phenotypes depending on the degree and type of tissues in which this abnormal glycogen accumulates. Typically, GSD-IV presents with rapidly progressive liver cirrhosis and death in early childhood...
October 12, 2018: JIMD Reports
https://www.readbyqxmd.com/read/30303820/novel-pathogenic-variants-in-gbe1-causing-fetal-akinesia-deformation-sequence-and-severe-neuromuscular-form-of-glycogen-storage-disease-type-iv
#12
Periyasamy Radhakrishnan, Amita Moirangthem, Shalini S Nayak, Anju Shukla, Mary Mathew, Katta M Girisha
Glycogen storage disease IV (GSD IV), caused by a defect in GBE1, is a clinically heterogeneous disorder. A classical hepatic form and a neuromuscular form have been described. The severe neuromuscular form presents as a fetal akinesia deformation sequence or a congenital subtype. We ascertained three unrelated families with fetuses/neonates who presented with fetal akinesia deformation sequence to our clinic for genetic counseling. We performed a detailed clinical evaluation, exome sequencing, and histopathology examination of two fetuses and two neonates from three unrelated families presenting with these perinatally lethal neuromuscular forms of GSD IV...
October 9, 2018: Clinical Dysmorphology
https://www.readbyqxmd.com/read/30286784/the-italian-neuromuscular-registry-a-coordinated-platform-where-patient-organizations-and-clinicians-collaborate-for-data-collection-and-multiple-usage
#13
Anna Ambrosini, Daniela Calabrese, Francesco Maria Avato, Felice Catania, Guido Cavaletti, Maria Carmela Pera, Antonio Toscano, Giuseppe Vita, Lucia Monaco, Davide Pareyson
BACKGROUND: The worldwide landscape of patient registries in the neuromuscular disease (NMD) field has significantly changed in the last 10 years, with the international TREAT-NMD network acting as strong driver. At the same time, the European Medicines Agency and the large federations of rare disease patient organizations (POs), such as EURORDIS, contributed to a great cultural change, by promoting a paradigm shift from product-registries to patient-centred registries. In Italy, several NMD POs and Fondazione Telethon undertook the development of a TREAT-NMD linked patient registry in 2009, with the referring clinical network providing input and support to this initiative through the years...
October 4, 2018: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/30282931/glycogen-storage-disease-ib-and-severe-periodontal-destruction-a-case-report
#14
Rui Ma, Fardad Moein Vaziri, Gregory J Sabino, Nima D Sarmast, Steven M Zove, Vincent J Iacono, Julio A Carrion
Background : Glycogen storage diseases (GSDs) are genetic disorders that result from defects in the processing of glycogen synthesis or breakdown within muscles, liver, and other cell types. It also manifests with impaired neutrophil chemotaxis and neutropenic episodes which results in severe destruction of the supporting dental tissues, namely the periodontium. Although GSD Type Ib cannot be cured, associated symptoms and debilitating oral manifestations of the disease can be managed through collaborative medical and dental care where early detection and intervention is of key importance...
October 3, 2018: Dentistry journal
https://www.readbyqxmd.com/read/30242630/feeding-difficulties-and-orofacial-myofunctional-disorder-in-patients-with-hepatic-glycogen-storage-diseases
#15
Chenia Caldeira Martinez, Tássia Tonon, Tatiéle Nalin, Lilia Farret Refosco, Carolina Fischinger Moura de Souza, Ida Vanessa Doederlein Schwartz
Hepatic glycogen storage diseases (GSDs) are inborn errors of metabolism whose dietary treatment involves uncooked cornstarch administration and restriction of simple carbohydrate intake. The prevalence of feeding difficulties (FDs) and orofacial myofunctional disorders (OMDs) in these patients is unknown. OBJECTIVE: To ascertain the prevalence of FDs and OMDs in GSD. METHODS: This was a cross-sectional, prospective study of 36 patients (19 males; median age, 12...
September 22, 2018: JIMD Reports
https://www.readbyqxmd.com/read/30193751/persistent-hypoglycemia-in-children-targeted-gene-panel-improves-the-diagnosis-of-hypoglycemia-due-to-inborn-errors-of-metabolism
#16
Emanuela Ponzi, Arianna Maiorana, Francesca Romana Lepri, Mafalda Mucciolo, Michela Semeraro, Roberta Taurisano, Giorgia Olivieri, Antonio Novelli, Carlo Dionisi-Vici
OBJECTIVES: To evaluate the role of next generation sequencing in genetic diagnosis of pediatric patients with persistent hypoglycemia. STUDY DESIGN: Sixty-four patients investigated through an extensive workup were divided in 3 diagnostic classes based on the likelihood of a genetic diagnosis: (1) single candidate gene (9/64); (2) multiple candidate genes (43/64); and (3) no candidate gene (12/64). Subsequently, patients were tested through a custom gene panel of 65 targeted genes, which included 5 disease categories: (1) hyperinsulinemic hypoglycemia, (2) fatty acid-oxidation defects and ketogenesis defects, (3) ketolysis defects, (4) glycogen storage diseases and other disorders of carbohydrate metabolism, and (5) mitochondrial disorders...
November 2018: Journal of Pediatrics
https://www.readbyqxmd.com/read/30186604/acute-respiratory-failure-as-presentation-of-late-onset-pompe-disease-complicating-the-diagnostic-process-as-a-labyrinth-a-case-report
#17
Francesco Menzella, Luca Codeluppi, Mirco Lusuardi, Carla Galeone, Franco Valzania, Nicola Facciolongo
Background: Acute respiratory failure can be triggered by several causes, either of pulmonary or extra-pulmonary origin. Pompe disease, or type II glycogen storage disease, is a serious and often fatal disorder, due to a pathological accumulation of glycogen caused by a defective activiy of acid α-glucosidase (acid maltase), a lysosomal enzyme involved in glycogen degradation. The prevalence of the disease is estimated between 1 in 40,000 to 1 in 300,000 subjects. Case presentation: This case report describes a difficult diagnosis of late-onset Pompe disease (LOPD) in a 52 year old Caucasian woman with acute respiratory failure requiring orotracheal intubation and subsequent tracheostomy for long-term mechanical ventilation 24 h/day...
2018: Multidisciplinary Respiratory Medicine
https://www.readbyqxmd.com/read/30183782/muscle-glycogen-concentrations-and-response-to-diet-and-exercise-regimes-in-warmblood-horses-with-type-2-polysaccharide-storage-myopathy
#18
Zoë J Williams, Megan Bertels, Stephanie J Valberg
Type 1 polysaccharide storage myopathy (PSSM1) is a glycogen storage disorder of known cause whereas the basis for type 2 PSSM (PSSM2) is unknown. The same diet and exercise regime prescribed for PSSM1 is recommended for PSSM2; however, the benefit of these recommendations for PSSM2 is undocumented. The objectives of this study were to determine traits of PSSM2 Warmblood horses (WB), determine the changes in exercise responses that occur with a recommended low-starch/fat-supplemented diet and exercise regime, and determine if glycogen concentrations correspond to the severity of signs...
2018: PloS One
https://www.readbyqxmd.com/read/30122451/a-hotspot-for-disease-associated-variants-of-human-pgm1-is-associated-with-impaired-ligand-binding-and-loop-dynamics
#19
Kyle M Stiers, Lesa J Beamer
Human phosphoglucomutase 1 (PGM1) plays a central role in cellular glucose homeostasis, catalyzing the conversion of glucose 1-phosphate and glucose 6-phosphate. Recently, missense variants of this enzyme were identified as causing an inborn error of metabolism, PGM1 deficiency, with features of a glycogen storage disease and a congenital disorder of glycosylation. Previous studies of selected PGM1 variants have revealed various mechanisms for enzyme dysfunction, including regions of structural disorder and side-chain rearrangements within the active site...
October 2, 2018: Structure
https://www.readbyqxmd.com/read/30117059/pompe-disease-from-basic-science-to-therapy
#20
REVIEW
Lara Kohler, Rosa Puertollano, Nina Raben
Pompe disease is a rare and deadly muscle disorder. As a clinical entity, the disease has been known for over 75 years. While an optimist might be excited about the advances made during this time, a pessimist would note that we have yet to find a cure. However, both sides would agree that many findings in basic science-such as the Nobel prize-winning discoveries of glycogen metabolism, the lysosome, and autophagy-have become the foundation of our understanding of Pompe disease. The disease is a glycogen storage disorder, a lysosomal disorder, and an autophagic myopathy...
August 16, 2018: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
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