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C19orf12 gene variants causing mitochondrial membrane protein-associated neurodegeneration (MPAN).
Eur J Hum Genet
January 2025
Institute of Bioinformatics, International Technology Park, Bangalore, 560066, India.
Mitochondrial membrane protein-associated neurodegeneration (MPAN) is a rare neurodegenerative disorder characterized by spastic paraplegia, parkinsonism and psychiatric and/or behavioral symptoms caused by variants in gene encoding chromosome-19 open reading frame-12 (C19orf12). We present here seven patients from six unrelated families with detailed clinical, radiological, and genetic investigations. Childhood-onset patients predominantly had a spastic ataxic phenotype with optic atrophy, while adult-onset patients were presented with cognitive, behavioral, and parkinsonian symptoms.
View Article and Find Full Text PDFCerebral venous sinus thrombosis after intrathecal administration of nusinersen.
BMJ Case Rep
January 2025
Neurosciences, Concord Repatriation General Hospital, Concord West, New South Wales, Australia
Cerebral venous sinus thrombosis is an uncommon sequela of low intracranial pressure, which may result from a lumbar puncture (LP). We describe a case of a patient in their 40s presenting with 48 hours of persistent headache following intrathecal administration of nusinersen for spinal muscular atrophy (SMA) type 3. There were no focal neurological signs or symptoms apart from baseline symmetrical proximal limb weakness attributed to SMA.
View Article and Find Full Text PDFConvolutional Neural Networks for the segmentation of hippocampal structures in postmortem MRI scans.
J Neurosci Methods
January 2025
Neuroimage Analytics Laboratory and Biggs Institute Neuroimaging Core, Glenn Biggs Institute for Neurodegenerative Disorders, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA; Research Imaging Institute, University of Texas Health Science Center at San Antonio, San Antonio, TX, USA. Electronic address:
Background: The hippocampus plays a crucial role in memory and is one of the first structures affected by Alzheimer's disease. Postmortem MRI offers a way to quantify the alterations by measuring the atrophy of the inner structures of the hippocampus. Unfortunately, the manual segmentation of hippocampal subregions required to carry out these measures is very time-consuming.
View Article and Find Full Text PDFDisruption of extracellular matrix and perineuronal nets modulates extracellular space volume and geometry.
J Neurosci
January 2025
Institute of Neuroimmunology, Slovak Academy of Science, 84510 Bratislava, Slovakia.
Extracellular matrix (ECM) is a network of macromolecules which has two forms - perineuronal nets (PNNs) and a diffuse ECM (dECM) - both influence brain development, synapse formation, neuroplasticity, CNS injury and progression of neurodegenerative diseases. ECM remodeling can influence extrasynaptic transmission, mediated by diffusion of neuroactive substances in the extracellular space (ECS). In this study we analyzed how disrupted PNNs and dECM influence brain diffusibility.
View Article and Find Full Text PDFEEFSEC deficiency: A selenopathy with early-onset neurodegeneration.
Am J Hum Genet
January 2025
Institute of Medical Genetics and Applied Genomics, University of Tübingen, 72076 Tübingen, Germany; Center for Rare Disease, University of Tübingen, 72076 Tübingen, Germany; Genomics for Health in Africa (GHA), Africa-Europe Cluster of Research Excellence (CoRE).
Inborn errors of selenoprotein expression arise from deleterious variants in genes encoding selenoproteins or selenoprotein biosynthetic factors, some of which are associated with neurodegenerative disorders. This study shows that bi-allelic selenocysteine tRNA-specific eukaryotic elongation factor (EEFSEC) variants cause selenoprotein deficiency, leading to progressive neurodegeneration. EEFSEC deficiency, an autosomal recessive disorder, manifests with global developmental delay, progressive spasticity, ataxia, and seizures.
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