We identified a novel abnormal hemoglobin variant caused by a frameshift mutation at nucleotide position 396 in exon 3 of the β-globin gene (): NM_000518:c.396delG. This variant causes an emergence of alternative amino acid sequence starting at codon 133 and a new stop codon formed in the 3' untranslated region (3'UTR) of the gene at amino acid position 158. This β-globin gene variant was identified in a woman with a long history of hemolytic anemia. We named this variant Hb Ryazan after the proband's city of origin.
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http://dx.doi.org/10.1080/03630269.2023.2202326 | DOI Listing |
Int Immunopharmacol
January 2025
Department of Transfusion Medicine, The Affiliated Taizhou People's Hospital of Nanjing Medical University, Taizhou 225300, Jiangsu, China. Electronic address:
Objective: The objective of this study was to rigorously investigate and elucidate the genetic mechanisms underlying the formation of the RH blood group in a specific case and to systematically analyse the RH blood group genes among the family members of the proband.
Methods: Serological methods were used to determine the RH blood group phenotype of the proband. To elucidate the underlying genetic mechanism responsible for the RH phenotype, a comprehensive approach was undertaken, including RHCE genotyping, sequencing of RHD and RHCE genes, and exon sequencing of RHAG.
Am J Hum Genet
January 2025
Department of Medicine, Indiana University School of Medicine, Indianapolis, IN, USA.
Each human genome has approximately 5 million DNA variants. Even for complete loss-of-function variants causing inherited, monogenic diseases, current understanding based on gene-specific molecular function does not adequately predict variability observed between people with identical mutations or fluctuating disease trajectories. We present a parallel paradigm for loss-of-function variants based on broader consequences to the cell when aberrant polypeptide chains of amino acids are translated from mutant RNA to generate mutated proteins.
View Article and Find Full Text PDFJ Clin Immunol
January 2025
Division of Allergy and Immunology, Children's Hospital of Philadelphia, Philadelphia, 19104, USA.
Major histocompatibility complex class I deficiency results from deleterious biallelic variants in TAP1, TAP2, TAPBP, and B2M genes. Only a few patients with variant-curated TAP1 deficiency (TAP1D) have been reported in the literature and the clinical phenotype has been variable with an emphasis on autoimmune and inflammatory complications. We report TAP1D in a Nepalese girl with a severe clinical phenotype with serious viral infections at a very young age.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
John P. Hussman Institute for Human Genomics, Miller School of Medicine, Miami, FL, USA.
Background: We previously identified a 44-base pair deletion in (ATP-binding cassette sub-family A member 7) (ABCA7) that is significantly associated with Alzheimer's disease (AD) in African Americans (AA), producing a frameshift mutation resulting in a truncated protein (p.Arg578Alafs). ABCA7 is a lipid transporter across cellular membranes.
View Article and Find Full Text PDFDystrophy-associated fer-1-like protein (dysferlin) conducts plasma membrane repair. Mutations in the DYSF gene cause a panoply of genetic muscular dystrophies. We targeted a frequent loss-of-function, DYSF exon 44, founder frameshift mutation with mRNA-mediated delivery of SpCas9 in combination with a mutation-specific sgRNA to primary muscle stem cells from two homozygous patients.
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