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| http://dx.doi.org/10.5114/ada.2022.117525 | DOI Listing |
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Deregulated ion channels contribute to RHOBTB2-associated developmental and epileptic encephalopathy.
Hum Mol Genet
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Department of Human Genetics, Inselspital Bern, University of Bern, Freiburgstrasse 15, Bern 3010, Switzerland.
While de novo missense variants in the BTB domains of atypical RhoGTPase RHOBTB2 cause a severe developmental and epileptic encephalopathy, de novo missense variants in the GTPase domain or bi-allelic truncating variants are associated with more variable neurodevelopmental and seizure phenotypes. Apart from the observation of RHOBTB2 abundance resulting from BTB-domain variants and increased seizure susceptibility in Drosophila overexpressing RhoBTB, our knowledge on RHOBTB2-related pathomechanisms is limited. We now found enrichment for ion channels among the differentially expressed genes from RNA-Seq on fly heads overexpressing RhoBTB.
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Department of Neurology, Institute of Neuroscience, Key Laboratory of Neurogenetics and Channelopathies of Guangdong Province and the Ministry of Education of China, the Second Affiliated Hospital, Guangzhou Medical University, Guangzhou, China.
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Department of Paediatrics and Adolescent Medicine, Queen Mary Hospital, Hong Kong, Hong Kong SAR, China.
Signal transducer and activator of transcription 1 (STAT1) gene mutations have broad clinical phenotypes, classified by the inheritance pattern and functional state. Individuals with autosomal dominant STAT1 deficiency are more susceptible to intracellular bacteria, the hallmark of which is Mendelian susceptibility to mycobacterial diseases (MSMDs) that are associated with increased risks of invasive disease by weakly virulent mycobacteria. We report a novel heterozygous missense mutation in exon 23 of the STAT1 gene (NM_007315.
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Department of Molecular Genetics and Microbiology, Duke University School of Medicine, Durham, North Carolina, United States of America.
De novo mutations in the RNA binding protein DDX3X cause neurodevelopmental disorders including DDX3X syndrome and autism spectrum disorder. Amongst ~200 mutations identified to date, half are missense. While DDX3X loss of function is known to impair neural cell fate, how the landscape of missense mutations impacts neurodevelopment is almost entirely unknown.
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