Background: Profiling the entire genome at base pair resolution in a single test offers novel insights into disease by means of dissection of genetic contributors to phenotypic features.
Methods: We performed genome sequencing for a patient who presented with atypical hereditary sensory and autonomic neuropathy, severe epileptic encephalopathy, global developmental delay, and growth hormone deficiency.
Results: Assessment of the variants detected by mapped sequencing reads followed by Sanger confirmation revealed that the proband is a compound heterozygote for rare variants within RETREG1 (FAM134B), a gene associated with a recessive form of hereditary sensory and autonomic neuropathy, but not with epileptic encephalopathy or global developmental delay. Further analysis of the data also revealed a heterozygous missense variant in DNM1L, a gene previously implicated in an autosomal dominant encephalopathy, epilepsy, and global developmental delay and confirmed by Sanger sequencing to be a de novo variant not present in parental genomes.
Conclusions: Our findings emphasize the importance of genome-wide sequencing in patients with a well-characterized genetic disease with atypical presentation. This approach reduces the potential for misdiagnoses.
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http://dx.doi.org/10.1002/mgg3.961 | DOI Listing |
medRxiv
January 2025
Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands.
The U4 small nuclear RNA (snRNA) forms a duplex with the U6 snRNA and, together with U5 and ~30 proteins, is part of the U4/U6.U5 tri-snRNP complex, located at the core of the major spliceosome. Recently, recurrent variants in the U4 RNA, transcribed from the gene, and in at least two other genes were discovered to cause neurodevelopmental disorder.
View Article and Find Full Text PDFAtherosclerosis
December 2024
Institute for Clinical Chemistry, University Hospital and University Zurich, 8091, Zürich, Switzerland. Electronic address:
Sphingolipids (SL) are crucial components of cellular membranes and play pivotal roles in various biological processes, including cell growth, differentiation, apoptosis, and stress responses. All SL contain a sphingoid base (SPB) backbone which is the shared and class-defining element. SPBs are heterogeneous in length and structure.
View Article and Find Full Text PDFAnn Clin Transl Neurol
January 2025
Department of Neurology, Movement Disorders Program, Boston Children's Hospital, Harvard Medical School, Boston, Massachusetts, USA.
Uniparental isodisomy (UPiD) can cause mixed phenotypes of imprinting disorders and autosomal-recessive diseases. We present the case of a 3-year-old male with a blended phenotype of TECPR2-related hereditary sensory and autonomic neuropathy (HSAN9) and Temple syndrome (TS14) due to maternal UPiD of chromosome 14, which includes a loss-of-function founder variant in the TECPR2 gene [NM_014844.5: c.
View Article and Find Full Text PDFJ Med Case Rep
January 2025
Department of Orthopaedics, Sahlgrenska University Hospital, Gothenburg, Sweden.
Background: Congenital insensitivity to pain with anhidrosis is a rare but devastating hereditary disease. Congenital insensitivity to pain with anhidrosis is caused by a mutation in the neurotrophic receptor tyrosine kinase 1 gene (NRTK1). The condition is characterized by multiple injuries, recurrent infections, and mental retardation.
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