Clinical manifestations and course of bullous X-linked congenital retinoschisis were studied in 10 infants aged 6-18 months. Visual function was evaluated by registration of electroretinogram and visual evoked potentials. The patients were followed up for 7.65 +/- 2.51 years. Giant retinal cysts were observed in 40% patients with X-linked retinoschisis aged under 3 years. Collapse (spontaneous or after laser coagulation of the retina) of retinal cysts with formation of demarcation pigmented lines was observed in 85% children. Twenty percent patients developed hemophthalmia which was completely resorbed within 4-12 months. At the age of 6-12 years visual acuity was 0.36 +/- 0.23. The prognosis of the condition is favorable, and therefore surgical treatment or laser coagulation are not recommended in infants with bullous retinoschisis, on condition that no negative changes in the disease course are observed.
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Clin Pediatr Endocrinol
January 2025
Department of Pediatrics, The University of Tokyo, Tokyo, Japan.
Wieacker-Wolff syndrome (WRWF) is an X-linked genetic disorder characterized by neuromusculoskeletal abnormalities caused by loss-of-function variants of the gene. Here, we report the case of a male infant with WRWF manifesting as multiple joint contractures and congenital anomalies at birth. He underwent gastrostomy to treat the gastroesophageal reflux disease, which caused mixed apnea and transient bradycardia.
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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 PDFGenes (Basel)
December 2024
Research Centre for Medical Genetics, 1 Moskvorechye St., 115522 Moscow, Russia.
Introduction: Pathogenic variants in the gene are linked to a spectrum of syndromes that exhibit partial clinical overlap. Hemizygous loss-of-function variants are considered lethal in males, while heterozygous loss-of-function variants generally result in oro-facial-digital syndrome type 1. A reported phenotype, Simpson-Golabi-Behmel syndrome type 2, was published once but remains controversial, with many specialists questioning its validity and arguing about its continued listing in the OMIM database.
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January 2025
Department of Ophthalmology, Casey Eye Institute, Oregon Health & Science University, Portland, Oregon, USA.
Introduction: Phosphoribosyl pyrophosphate synthetase 1 () is an X-linked gene critical for nucleotide metabolism. Pathogenic variants cause three overlapping phenotypes: Arts syndrome (severe neurological disease), Charcot-Marie-Tooth type 5 [CMTX5] (peripheral neuropathy), and non-syndromic sensorineural hearing loss (SNHL). Each may be associated with retinal dystrophy.
View Article and Find Full Text PDFBiol 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.
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