We describe the case of a 15-year-old male with early juvenile type GM2 gangliosidosis. He first manifested with progressive clumsiness in his extremities at the age of 1.5 years, followed by motor regression. Intellectual disability became evident as late as age 6 years. This discrepancy along with rapid motor deterioration after varicella infection, lack of startle response or macrocephaly, and paucity of myoclonus were thought to be characteristic of juvenile GM2 gangliosidosis. In contrast to the cerebellar atrophy as the initial finding in usual juvenile GM2 gangliosidosis, magnetic resonance imaging revealed initially cerebral, and subsequently cerebellar, progressive atrophy. Autistic behavioral problems, including phonophobia, during intellectual regression in this patient was also unusual in juvenile GM2 gangliosidosis. Thus, recognition of these features would prompt proper diagnosis and insights into the pathomechanisms of GM2 gangliosidosis.
Download full-text PDF |
Source |
|---|
Publication Analysis
Top Keywords
Similar Publications
Clinical and biochemical abnormalities in a feline model of GM2 activator deficiency.
Mol Genet Metab
November 2024
Scott-Ritchey Research Center, College of Veterinary Medicine, Auburn University, AL 36849, United States of America; Department of Anatomy, Physiology & Pharmacology, College of Veterinary Medicine, Auburn University, AL 36849, United States of America. Electronic address:
Though it has no catalytic activity toward GM2 ganglioside, the GM2 activator protein (GM2A) is essential for ganglioside hydrolysis by facilitating the action of lysosomal ß-N-acetylhexosaminidase. GM2A deficiency results in death in early childhood due to rapid central nervous system deterioration similar to the related GM2 gangliosidoses, Tay-Sachs disease and Sandhoff disease. This manuscript further characterizes a feline model of GM2A deficiency with a focus on clinical and biochemical parameters that may be useful as benchmarks for translational therapeutic research.
View Article and Find Full Text PDFA natural history study of pediatric patients with early onset of GM1 gangliosidosis, GM2 gangliosidoses, or gaucher disease type 2 (RETRIEVE).
Orphanet J Rare Dis
December 2024
Division of Metabolism and Children's Research Center, Reference Center for Inborn Errors of Metabolism, University Children's Hospital of Zurich, University of Zurich, Zurich, Switzerland.
Background: The GM1 and GM2 gangliosidoses and type 2 Gaucher disease (GD2) are inherited lysosomal storage disorders with most cases having symptom onset in infancy and reduced life expectancy. The conditions are rare, and there is therefore a need for accurate and up to date information concerning the disease course and survival to assist in the design of clinical trials. RETRIEVE is a natural history study aiming to: (1) collect data on the survival of patients with early-onset (onset of first neurological manifestation before 24 months of age) GM1, GM2, or GD2; (2) collect data that could constitute a historical control group for future clinical trials; and (3) evaluate whether the conditions can be assessed together in a single interventional clinical trial.
View Article and Find Full Text PDFIntravenous gene therapy improves lifespan and clinical outcomes in feline Sandhoff Disease.
bioRxiv
November 2024
Scott Ritchey Research Center, Auburn University College of Veterinary Medicine; Auburn, AL, USA.
Sandhoff Disease (SD), a fatal neurodegenerative disorder, is caused by the absence of ß-hexosaminidase (Hex) and subsequent accumulation of GM2 ganglioside in lysosomes. Previous studies have led to adeno-associated virus (AAV) gene therapy for children with GM2 gangliosidosis in both expanded access and Phase I/II clinical trials via intracranial and/or cerebrospinal fluid-based delivery. The current study investigated intravenous (IV) gene therapy of SD cats, treated at one month of age with a bicistronic AAV vector.
View Article and Find Full Text PDFVoice of the Patient Report on GM2 Gangliosidosis (Tay-Sachs and Sandhoff).
Hum Gene Ther
November 2024
National Tay-Sachs & Allied Diseases Association (NTSAD), Boston, Massachusetts, USA.
4-Phenylbutyric acid mitigates ER stress-induced neurodegeneration in the spinal cords of a GM2 gangliosidosis mouse model.
Hum Mol Genet
November 2024
Department of Biology, McMaster University, 1280 Main St. W., Hamilton, ON L8S 4K1, Canada.
Sandhoff disease (SD), a fatal and rare lysosomal storage disorder (LSD), is caused by a deficiency of the enzyme β-hexosaminidase B and leads to severe accumulation of GM2 gangliosides in lysosomes, primarily within the central nervous system (CNS). This accumulation results in severe neurological impairment, lower motor neuron disease, and death. Currently, there are no effective therapies available for SD.
View Article and Find Full Text PDFWant AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!