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ATXN2 polyglutamine intermediate repeats length expansions in Malaysian patients with amyotrophic lateral sclerosis (ALS).
Neurogenetics
January 2025
Department of Biomedical Science, Faculty of Medicine, University of Malaya, Kuala Lumpur, 50603, Malaysia.
Intermediate CAG repeats from 29 to 33 in the ATXN2 gene contributes to the risk of amyotrophic lateral sclerosis (ALS) in European and Asian populations. In this study, 148 ALS patients of multiethnic descent: Chinese (56.1%), Malay (24.
View Article and Find Full Text PDFUnlabelled: is one of the three most frequently mutated genes in age-related clonal hematopoiesis (CH), alongside and . CH can progress to myeloid malignancies including chronic monomyelocytic leukemia (CMML), and is also strongly associated with inflammatory cardiovascular disease and all-cause mortality in humans. DNMT3A and TET2 regulate DNA methylation and demethylation pathways respectively, and loss-of-function mutations in these genes reduce DNA methylation in heterochromatin, allowing de-repression of silenced elements in heterochromatin.
View Article and Find Full Text PDFhas been identified in human and mouse HD brain as the pathogenic exon 1 mRNA generated from aberrant splicing between exon 1 and 2 that contributes to aggregate formation and neuronal dysfunction (Sathasivam et al., 2013). Detection of the HTT exon 1 protein (HTTex1p) has been accomplished with surrogate antibodies in fluorescence-based reporter assays (MSD, HTRF), and immunoprecipitation assays, in HD postmortem cerebellum and knock-in mice but direct detection by SDS-PAGE and western blot assay has been lacking.
View Article and Find Full Text PDFThe GAA repeat expansion is a major cause of ataxia in the Cypriot population.
Brain Commun
January 2025
Neurogenetics Department, The Cyprus Institute of Neurology and Genetics, Nicosia 2371, Cyprus.
Dominantly inherited intronic GAA repeat expansions in the fibroblast growth factor 14 gene have recently been shown to cause spinocerebellar ataxia 27B. Currently, the pathogenic threshold of (GAA) repeat units is considered highly penetrant, while (GAA) is likely pathogenic with reduced penetrance. This study investigated the frequency of the GAA repeat expansion and the phenotypic profile in a Cypriot cohort with unresolved late-onset cerebellar ataxia.
View Article and Find Full Text PDFGenomic characterization of Huntington's disease genetic modifiers informs drug target tractability.
Brain Commun
January 2025
Department of Pharmacology and Therapeutics, Max Rady College of Medicine, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, CanadaR3E 0T6.
Huntington's disease is caused by a CAG repeat in the gene. Repeat length correlates inversely with the age of onset but only explains part of the observed clinical variability. Genome-wide association studies highlight DNA repair genes in modifying disease onset, but further research is required to identify causal genes and evaluate their tractability as drug targets.
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