The identification of mouse models for the various forms of human neurosensory non-syndromic recessive deafness would constitute a major advance in the study of human deafness. Here we describe the localization of a human gene for neurosensory, nonsyndromic recessive deafness (NSRD2) to chromosome 11q13.5 by linkage analysis of a highly consanguineous family. A maximum lod score of 10.63 (theta = 0.018) was obtained for the microsatellite marker D11S527. Homozygosity mapping refined the localization of NSRD2 to a 6 cM interval also containing the olfactory marker protein (OMP) gene. The murine homologue of OMP is tightly linked to the autosomal recessive deafness gene sh-1. These results, and clinical data, suggest that NSRD2 is the human homologue of the mouse sh-1 gene.
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http://dx.doi.org/10.1093/hmg/3.6.989 | DOI Listing |
Nephrol Dial Transplant
January 2025
Paediatric Nephrology, UZ Leuven and Department of Cellular and Molecular Physiology, KUL, Leuven, Belgium.
Background And Hypothesis: ATP6V1B1 encodes a subunit of the vacuolar H+-ATPase and pathogenic variants are associated with autosomal recessive distal renal tubular acidosis (dRTA) with deafness. Heterozygous variants predicted to affect a specific amino acid, Arg394, have been recurrently reported in dRTA but their significance has been unclear. We hypothesised that these variants are associated with a dominant disease mechanism.
View Article and Find Full Text PDFGenes Genomics
January 2025
Medical Genetic Diagnosis and Therapy Center of Fujian Maternity and Child Health Hospital College of Clinical Medicine for Obstetrics & Gynecology and Pediatrics, Fujian Medical University, Fujian Provincial Key Laboratory of Prenatal Diagnosis and Birth Defect, Fuzhou, Fujian, China.
Background: Hearing loss adversely impacts language development, acquisition, and the social and cognitive maturation of affected children. The hearing loss etiology mainly includes genetic factors and environmental factors, of which the former account for about 50-60%.
Objective: This study aimed to investigate the genetic basis of autosomal recessive non-syndromic hearing loss (NSHL) by identifying and characterizing novel variants in the CDH23 gene.
Genes (Basel)
December 2024
Department of Clinical Genetics, Medical University of Lodz, Pomorska Str. 251, 92-213 Lodz, Poland.
-spectrum disorders are caused by a mutation in the gene. The term includes a wide range of rare disorders, from the most severe Wolfram syndrome with autosomal recessive inheritance to milder clinical manifestations with a single causative variant in the gene, such as Wolfram-like syndrome, low-frequency sensorineural hearing loss (LFSNHL), isolated diabetes mellitus (DM), nonsyndromic optic atrophy (OA), and isolated congenital cataracts. The aim of this study was to evaluate genotype-phenotype correlations in Polish patients with -spectrum disorders.
View Article and Find Full Text PDFNeurogenetics
January 2025
Department of Otolaryngology & Head and Neck, Liuzhou Worker's Hospital of Guangxi Zhuang Autonomous Region, 156 Heping Road, Liuzhou, 545007, China.
Background: Mutations in the LARS2 gene are correlated with Perrault syndrome, a rare autosomal recessive genetic disorder, that is typically characterized by sensorineural hearing loss and ovarian insufficiency.
Methods: Whole-exome sequencing and mutational analysis were employed to identify hearing loss-causing genes in a Chinese family from the Guangxi Zhuang Autonomous Region. Clinical phenotypes, audiological data, and color Doppler ultrasound of the family were collected, and a series of computer software were used to analyze the impact of genetic variations on protein structure and function.
Nat Commun
December 2024
The Solomon H. Snyder Department of Neuroscience, Johns Hopkins University School of Medicine, Baltimore, MD, 21205, USA.
Deafness is the most common form of sensory impairment in humans and frequently caused by defects in hair cells of the inner ear. Here we demonstrate that in male mice which model recessive non-syndromic deafness (DFNB6), inactivation of Tmie in hair cells disrupts gene expression in the neurons that innervate them. This includes genes regulating axonal pathfinding and synaptogenesis, two processes that are disrupted in the inner ear of the mutant mice.
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