Autosomal recessive congenital hereditary endothelial dystrophy (CHED2) is a severe and rare corneal disorder that presents at birth or shortly thereafter, characterized by corneal opacification and nystagmus. Recently the gene for CHED2 was identified and seven different mutations in the SLC4A11 gene were reported. Here, we report seven novel mutations and two previously identified mutations in families from India and the United Kingdom with recessive CHED. The novel changes include two nonsense (p.Trp240X; p.Gln800X) three missense (p.Glu143Lys; p.Cys386Arg; p.Arg755Trp) and two splice site mutations (c.2240+1G>A; c.2437-1G>A). Interestingly, the c.2398C>T (p.Gln800X) and c.2437-1G>A identified in two affected siblings represent the first compound heterozygous mutations in the SLC4A11 gene.
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http://dx.doi.org/10.1002/humu.9487 | DOI Listing |
Indian J Ophthalmol
December 2024
Srimati Kanuri Santhamma Center for Vitreoretinal Diseases, Anant Bajaj Retina Institute, Kallam Anji Reddy Campus, L V Prasad Eye Institute, Hyderabad, Telangana, India.
Purpose: To assess the clinical phenotypes and genetic mutations in patients with Leber congenital amaurosis (LCA) from a tertiary eye care center in India.
Design: Retrospective observational study.
Methods: The study includes patients with a clinical diagnosis of LCA who underwent genetic testing from January 2016 to December 2021.
J Dermatol
December 2024
Department of Dermatology, Faculty of Medicine and Graduate School of Medicine, Hokkaido University, Sapporo, Japan.
Phasing, the process of determining which alleles at different loci on homologous chromosomes belong together on the same chromosome, is crucial in the diagnosis and management of autosomal recessive diseases. Advances in long-read sequencing technologies have significantly enhanced our ability to accurately determine haplotypes. This review discusses the application of low-coverage long-read sequencing, nanopore Cas9-guided long-read sequencing, and adaptive sampling in phasing, highlighting their utility in complex clinical scenarios.
View Article and Find Full Text PDFJ Clin Res Pediatr Endocrinol
December 2024
Department of Pediatric Endocrinology, Marmara University, School of Medicine, Istanbul, Turkiye.
Signs of virilization, such as clitoromegaly, labio-scrotal fusion, and urogenital sinus may be observed in females with 21-hydroxylase deficiency (21-OHD) and other rare virilizing forms of congenital adrenal hyperplasia (CAH). This makes sex determination difficult, and multiple reconstructive surgeries in the postnatal period may be required. As 21-OHD is an autosomal recessive disease, the chance of any child being affected is one in four and so only one in eight will be an affected female.
View Article and Find Full Text PDFJ Clin Res Pediatr Endocrinol
December 2024
Department of Pediatric Endocrinology, Ankara University Faculty of Medicine, Ankara, Turkiye.
Congenital adrenal hyperplasia (CAH) is an autosomal recessive disease caused by the deficiency of one of the enzymes involved in cortisol synthesis. More than 95% of the cases occur as a result of defects in the gene encoding 21-hydroxylase (CYP21A2). 21 hydroxylase deficiency has been divided into classical and non-classical forms.
View Article and Find Full Text PDFJ Clin Res Pediatr Endocrinol
December 2024
Department of Pediatric Endocrinology, Ankara University Faculty of Medicine, Ankara, Turkiye.
Congenital adrenal hyperplasia (CAH) is an autosomal recessive disease caused by the deficiency of one of the enzymes involved in cortisol synthesis. Between 90% and 99% of cases of CAH are caused by 21-hydroxylase deficiency (21OHD) caused by mutations in CYP21A2. Although 21OHD has been historically divided into classical and non-classical forms, it is now thought to show a continuous phenotype.
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