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An investigation of a hemophilia A female with heterozygous intron 22 inversion and skewed X chromosome inactivation.
Front Genet
January 2025
Department of Hematology, The Second Affiliated Hospital, Chongqing Medical University, Chongqing, China.
Objectives: Hemophilia A (HA) is an X-linked recessive inherited bleeding disorder that typically affects men. Women are usually asymptomatic carriers, and rarely presenting with severe or moderately severe phenotype. This study aims to describe a case of a 17-year-old girl with moderate HA, investigating the mechanisms of her condition and the genetic basis within her family.
View Article and Find Full Text PDFClinical evaluation of long-read sequencing-based episignature detection in developmental disorders.
Genome Med
January 2025
Laboratory of Cytogenetics and Genome Research, Centre for Human Genetics, KU Leuven, Leuven, 3000, Belgium.
Background: A subset of developmental disorders (DD) is characterized by disease-specific genome-wide methylation changes. These episignatures inform on the underlying pathogenic mechanisms and can be used to assess the pathogenicity of genomic variants as well as confirm clinical diagnoses. Currently, the detection of these episignature requires the use of indirect methylation profiling methodologies.
View Article and Find Full Text PDFNovel Intragenic and Genomic Variants Highlight the Phenotypic Variability in -Related Disease.
Genes (Basel)
December 2024
Department of Ophthalmology and Visual Sciences, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA.
: Disruption of results in microphthalmia with linear skin lesions (MLS) characterized by microphthalmia/anophthalmia, corneal opacity, aplastic skin lesions, variable central nervous system and cardiac anomalies, intellectual disability, and poor growth in heterozygous females. Structural variants consisting of chromosomal rearrangements or deletions are the most common variant type, but a small number of intragenic variants have been reported. : Exome sequencing identified variants affecting .
View Article and Find Full Text PDFKDM6A facilitates Xist upregulation at the onset of X inactivation.
Biol Sex Differ
January 2025
Department of Laboratory Medicine and Pathology, School of Medicine, University of Washington, Seattle, WA, 98195, USA.
Background: X chromosome inactivation (XCI) is a female-specific process in which one X chromosome is silenced to balance X-linked gene expression between the sexes. XCI is initiated in early development by upregulation of the lncRNA Xist on the future inactive X (Xi). A subset of X-linked genes escape silencing and thus have higher expression in females, suggesting female-specific functions.
View Article and Find Full Text PDFIntragenic duplication of PHEX in a girl with X-linked hypophosphatemia: a case report with review of literature.
Endocr J
December 2024
Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo 157-8535, Japan.
Over 70 intragenic copy-number variations (CNVs) of PHEX have been identified in patients with X-linked hypophosphatemia (XLH). However, the underlying mechanism of these CNVs has been poorly investigated. Furthermore, although PHEX undergoes X chromosome inactivation (XCI), the association between XLH in women with heterozygous PHEX variants and skewed XCI remains unknown.
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