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[Genetic analysis of a child with Leukoencephalopathy with ataxia caused by a homozygous variant of CLCN2 gene and a literature review].
Zhonghua Yi Xue Yi Chuan Xue Za Zhi
January 2025
Department of Neurology, the Affiliated Children's Hospital of Xiangya School of Medicine, Central South University (Hunan Children's Hospital), Changsha, Hunan 410007, China.
Objective: To explore the clinical manifestations and genetic characteristics of a child with Leukoencephalopathy with ataxia (LKPAT) caused by a CLCN2 gene variant.
Methods: A retrospective analysis was conducted on the clinical data of a child admitted to Hunan Children's Hospital in June 2024 due to "intermittent convulsions for 13 days". Peripheral blood samples were collected from the child and his parents for whole exome sequencing, followed by Sanger sequencing validation and pathogenicity analysis of candidate variants.
Genetic Variant Analyses Identify Novel Candidate Autism Risk Genes from a Highly Consanguineous Cohort of 104 Families from Oman.
Int J Mol Sci
December 2024
Neurological Disorder Research Center, Qatar Biomedical Research Institute (QBRI), Hamad Bin Khalifa University (HBKU), Qatar Foundation, Doha P.O. Box 5825, Qatar.
Deficits in social communication, restricted interests, and repetitive behaviours are hallmarks of autism spectrum disorder (ASD). Despite high genetic heritability, the majority of clinically diagnosed ASD cases have unknown genetic origins. We performed genome sequencing on mothers, fathers, and affected individuals from 104 families with ASD in Oman, a Middle Eastern country underrepresented in international genetic studies.
View Article and Find Full Text PDFLethal Phenotype and Expansion of the Clinical Spectrum of Biallelic Loss of Function Variant in SENP7 Gene Unveiled by Whole Exome Sequencing.
Clin Genet
January 2025
Prenatal Diagnosis and Fetal Medicine Department, Human Genetics and Genome Research Institute, National Research Centre (NRC), Cairo, Egypt.
SUMOylation involves covalent attachment of small ubiquitin-like modifier (SUMO) proteins to specific lysine residues on target proteins and regulates various aspects of their function. Sentrin-specific proteases (SENPs) are key players in both the conjugation reaction of SUMO proteins to their targets and the subsequent deconjugation of SUMO-conjugated substrates. Here, we provide the first comprehensive prenatal description of a lethal syndrome linked to a novel homozygous stop-gain variant in SENP7 c.
View Article and Find Full Text PDFA Novel Homozygous Loss-of-Function Variant in GPR156 Delineates Non-syndromic Hearing Loss.
Biochem Genet
January 2025
Department of Dermatology, Yale University School of Medicine, New Haven, CT, USA.
Non-syndromic hearing loss (NSHL) is a genetically heterogeneous disorder accounting for almost 70% of the total congenital hearing loss. The implementation of rapid advanced sequencing methods has significantly contributed to the correct molecular diagnosis for several rare genetic disorders, including NHSL. Features of two probands with NHSL were clinically and genetically evaluated.
View Article and Find Full Text PDFGenetic modulation of RNA splicing rescues BRCA2 function in mutant cells.
Life Sci Alliance
March 2025
Faculdade de Medicina da Universidade de Lisboa, Lisboa, Portugal
Variants in the hereditary cancer-associated and genes can alter RNA splicing, producing transcripts that encode internally truncated yet potentially functional proteins. However, few studies have quantitatively analyzed variant-specific splicing isoforms. Here, we investigated cells heterozygous and homozygous for the :c.
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