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Hypomyelination with brainstem and spinal cord involvement and leg spasticity (HBSL), caused by aspartyl-tRNA synthetase () gene mutations, is extremely rare, with only a few cases reported worldwide; thus, reports on HBSL treatment are few. In this review, we summarized the clinical manifestations, imaging features, treatment methods, and gene mutations responsible for HBSL based on relevant studies and cases.
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http://dx.doi.org/10.3389/fgene.2022.1009230 | DOI Listing |
Ital J Pediatr
June 2025
Child and Adolescent Neurology and Psychiatric Section, Azienda Ospedaliera Universitaria Policlinico 'G. Rodolico-San Marco', Department of Clinical and Experimental Medicine, University of Catania, Catania, 95124, Italy.
Background: Recessive mutations in POLR3A exhibit considerable phenotypic diversity, spanning from severe childhood-onset hypomyelinating leukodystrophic syndrome to less severe gait disorders, which may present later in life and may be accompanied by additional non-neurological symptoms. In this study, we report a new case of rare POLR3A variants in a 6-year-old female patient sharing common genetic and neuropsychological profiles of POLR3-related disorders, although without revealing the classic MRI phenotype and severe clinical signs of POLR3-related leukodystrophy, such as diffuse hypomyelination.
Case Presentation: Our probe was born after full term pregnancy complicated by Intrauterine Growth Restriction and risk of preterm birth treated with tocolytics during the last weeks of pregnancy.
Hum Mutat
April 2025
Department of Neurology and Neurosurgery McGill University, Montréal, Quebec, Canada.
POLR3-related hypomyelinating leukodystrophy (POLR3-HLD) is a rare inherited neurological disorder caused by biallelic pathogenic variants in specific genes encoding subunits of RNA polymerase III (Pol III). Here, we report the third patient worldwide with pathogenic variants in and clinical features consistent with POLR3-HLD. The female patient presented with mild intellectual and behavioural disturbances in childhood, as well as growth delay, with brain MRI revealing diffuse hypomyelination and a pattern consistent with POLR3-HLD.
View Article and Find Full Text PDFJ Child Neurol
January 2025
Child Health and Human Development Program, Research Institute of the McGill University Health Centre, Montreal, QC, Canada.
RNA polymerase III (POLR3)-related leukodystrophy is a rare, neurodegenerative disorder characterized by hypomyelination, hypodontia, and hypogonadotropic hypogonadism. Despite the challenges of caring for a child with POLR3-related leukodystrophy, few studies have examined parents' disease burden. We sought to investigate quality of life and stress levels amongst parents of children with POLR3-related leukodystrophy.
View Article and Find Full Text PDFInt J Mol Sci
October 2024
NeuroRepair Department, Mossakowski Medical Research Institute, Polish Academy of Sciences, 02-106 Warsaw, Poland.
Handb Clin Neurol
September 2024
Division of Inherited Metabolic Diseases, University Hospital of Padova, Padova, Italy.
Lysosomal storage disorders (LSDs) are a group of inherited metabolic diseases caused by dysfunction of the lysosomal system, with subsequent progressive accumulation of macromolecules, activation of inflammatory response, and cell death. Neurologic damage is almost always present, and it is usually degenerative. White matter (WM) involvement may be primary or secondary.
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