AUNA2: A Novel Type of Non-Syndromic Slowly Progressive Auditory Synaptopathy/Auditory Neuropathy with Autosomal-Dominant Inheritance

2017 ◽  
Vol 22 (1) ◽  
pp. 30-40 ◽  
Author(s):  
Ruth Lang-Roth ◽  
Eva Fischer-Krall ◽  
Cornelia Kornblum ◽  
Gudrun Nürnberg ◽  
Dieter Meschede ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Autosomal Dominant ◽  
Family Members ◽  
Large Family ◽  
Auditory Neuropathy ◽  
Single Family ◽  
Linkage Analyses ◽  
A Genome ◽  
Organ Systems ◽  
Auditory Synaptopathy

Background: Auditory synaptopathy/neuropathy (AS/AN) is a heterogeneous disorder, which may be caused by environmental factors like postnatal hyperbilirubinemia or by genetic factors. The genetic forms are subdivided into syndromic and non-syndromic types, and show different inheritance patterns with a strong preponderance of autosomal-recessive forms. To date, only a single locus for non-syndromic autosomal-dominant AS/AN (AUNA1) has been reported in a single family, in which a non-coding DIAPH3 mutation was subsequently described as causative. Materials and Methods: Here, we report detailed clinical data on a large German AS/AN family with slowly progressive postlingual hearing loss. Affected family members developed their first symptoms in their second decade. Moderate hearing loss in the fourth decade then progressed to profound hearing impairment in older family members. Comprehensive audiological and neurological tests were performed in the affected family members. Genetic testing comprised linkage analyses with polymorphic markers and a genome-wide linkage analysis using the Affymetrix GeneChip® Human Mapping 250K. Results and Conclusion: We identified a large family with autosomal-dominant AS/AN. By means of linkage analyses, the AUNA1 locus was excluded, and putatively linked regions on chromosomal bands 12q24 and 13q34 were identified as likely carrying the second locus for autosomal-dominant AS/AN (AUNA2). AUNA2 is associated with a slowly progressive postlingual hearing loss without any evidence for additional symptoms in other organ systems.

Autosomal-Dominant Progressive Sensorineural Hearing Loss in a Large North American Family

1996 ◽  
Vol 5 (1) ◽  
pp. 105-111 ◽  
Author(s):  
Chris Halpin ◽  
Umang Khetarpal ◽  
Michael McKenna
Keyword(s):  
Hearing Loss ◽  
Sensorineural Hearing Loss ◽  
North American ◽  
Autosomal Dominant ◽  
Family Members ◽  
Sensorineural Hearing ◽  
American Family ◽  
Dominant Mutation ◽  
The Family ◽  
Temporal Bones

Forty-nine members of a family with autosomal-dominant progressive sensorineural hearing loss were evaluated by audiologists, otologists, and geneticists. The results presented here show a nonsyndromic, autosomal-dominant mutation causing progressive sensorineural hearing loss beginning at about age 20 and becoming profound by approximately age 45. Because of the unambiguous nature of the hearing loss, the size of the family, and the availability of two previously described temporal bones from family members, a fairly complete description of the nature and impact of this mutation will be presented.

scholarly journals NCOA3 identified as a new candidate to explain autosomal dominant progressive hearing loss

2020 ◽  
Author(s):  
Rodrigo Salazar da Silva ◽  
Vitor Lima Goes Dantas ◽  
Leandro Ucela Alves ◽  
Ana Carla Batissoco ◽  
Jeanne Oiticica ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Autosomal Dominant ◽  
Snp Array ◽  
Large Family ◽  
Sensory Function ◽  
Causative Mutation ◽  
Linkage Data ◽  
Potential Candidate ◽  
Mineral Density ◽  
Progressive Hearing Loss

Abstract Hearing loss is a frequent sensory impairment in humans and genetic factors account for an elevated fraction of the cases. We have investigated a large family of five generations, with 15 reported individuals presenting non-syndromic, sensorineural, bilateral and progressive hearing loss, segregating as an autosomal dominant condition. Linkage analysis, using SNP-array and selected microsatellites, identified a region of near 13 cM in chromosome 20 as the best candidate to harbour the causative mutation. After exome sequencing and filtering of variants, only one predicted deleterious variant in the NCOA3 gene (NM_181659, c.2810C > G; p.Ser937Cys) fit in with our linkage data. RT-PCR, immunostaining and in situ hybridization showed expression of ncoa3 in the inner ear of mice and zebrafish. We generated a stable homozygous zebrafish mutant line using the CRISPR/Cas9 system. ncoa3−/− did not display any major morphological abnormalities in the ear, however, anterior macular hair cells showed altered orientation. Surprisingly, chondrocytes forming the ear cartilage showed abnormal behaviour in ncoa3−/−, detaching from their location, invading the ear canal and blocking the cristae. Adult mutants displayed accumulation of denser material wrapping the otoliths of ncoa3−/− and increased bone mineral density. Altered zebrafish swimming behaviour corroborates a potential role of ncoa3 in hearing loss. In conclusion, we identified a potential candidate gene to explain hereditary hearing loss, and our functional analyses suggest subtle and abnormal skeletal behaviour as mechanisms involved in the pathogenesis of progressive sensory function impairment.

The deafness, pre-auricular sinus, external ear anomaly and commissural lip pits syndrome – otological, vestibular and radiological findings

1994 ◽  
Vol 108 (1) ◽  
pp. 13-18 ◽  
Author(s):  
H. A. M. Marres ◽  
C. W. R. J. Cremers ◽  
P. L. M. Huygen ◽  
F. B. M. Joosten
Keyword(s):  
Hearing Loss ◽  
Autosomal Dominant ◽  
Round Window ◽  
Large Family ◽  
Ossicular Chain ◽  
Branchial Arch ◽  
Hearing Improvement ◽  
Radiological Findings ◽  
Conductive Hearing

Commissural lip pits, pinna dysplasia, pre-auricular sinus and hearing loss constitute a recently described autosomal dominant branchial arch syndrome. In a large family, eight out of the 74 members were also affected by conductive hearing loss. No inner ear abnormalities could be demonstrated on the CT scans. In three patients (four ears) out of four patients (six ears), exploratory tympanotomy revealed serious ossicular chain anomalies. In one ear, round window aplasia was also present. Long-term hearing improvement could only be achieved in one ear.

Nonsyndromic Hearing Loss: An Analysis of Audiograms

1994 ◽  
Vol 103 (6) ◽  
pp. 428-433 ◽  
Author(s):  
Xuezhong Liu ◽  
Lirong Xu
Keyword(s):  
Hearing Loss ◽  
Autosomal Recessive ◽  
Autosomal Dominant ◽  
Family Members ◽  
Nonsyndromic Hearing Loss ◽  
Significant Difference ◽  
Genetic Hearing Loss ◽  
Group Information

We examined features of the audiograms of 136 individuals, from 28 families, affected by nonsyndromic genetic hearing loss. There were 83 (12 families) with autosomal dominant (AD) loss, 50 (15 families) with autosomal recessive (AR) loss, and 3 (1 family) with X-linked recessive loss. The main audiogram shapes found were sloping (50.3%), residual (26.5%), and flat (21.0%). Specific shapes (ascending and U-shaped) only occurred in 3.7% of AD cases. Audiogram shapes were found to be significantly different between AD and AR families, and showed intrafamilial and interfamilial variability. In the AR group, the main shapes were residual and sharply sloping, and in the AD group, sharply sloping, flat, and gently sloping. There was a significant difference in the degree of hearing loss between AD and AR types, with AD being milder than AR. It has been shown that there is more marked intrafamilial variation in the degree of hearing loss in AD families than in AR ones. The results suggest that the audiograms of nonsyndromic hearing loss are usually nonspecific and that counseling of family members would be better based on the specific family's condition rather than on group information.

scholarly journals Prevalence and Clinical Features of Autosomal Dominant and Recessive TMC1-Associated Hearing Loss.

2021 ◽  
Author(s):  
Shin-ya Nishio ◽  
Shin-ichi Usami
Keyword(s):  
Hearing Loss ◽  
Clinical Features ◽  
Autosomal Recessive ◽  
Haplotype Analysis ◽  
Autosomal Dominant ◽  
Founder Mutation ◽  
Family Members ◽  
Causative Gene ◽  
Pathogenic Variants ◽  
Syndromic Hearing Loss

Abstract TMC1 is a causative gene for both autosomal dominant non-syndromic hearing loss (DFNA36) and autosomal recessive non-syndromic hearing loss (DFNB7/11). To date, 125 pathogenic variants in TMC1 have been reported. Most of the TMC1 variants are responsible for autosomal recessive hearing loss, with only 7 variants reported as causative for DFNA36. Here we reported the prevalence of TMC1-associated hearing loss in a large non-syndromic hearing loss cohort of about 12,000 subjects. As a result, we identified 26 probands with TMC1-associated hearing loss and the estimated prevalence of TMC1-associated hearing loss in the Japanese hearing loss cohort to be 0.18% among all patients. Among the 26 probands with TMC1-associated hearing loss, 15 cases were identified from autosomal dominant hearing loss families. By using the audiometric data from the probands, family members and previously reported cases, we evaluated the hearing deterioration speed for DFNA36 patients. In addition, we performed haplotype analysis for 11 unrelated autosomal dominant hearing loss families carrying the same variant TMC1: NM_138691:c.1627G > A:p.D543N. The results clearly indicated that the same haplotype was present despite of families being unrelated, supporting the contention that this variant occurred by founder mutation.

scholarly journals Locus for Familial Migrainous Vertigo Disease Maps to Chromosome 5q35

2009 ◽  
Vol 118 (9) ◽  
pp. 670-676 ◽  
Author(s):  
Fayez Bahmad ◽  
Steven R. DePalma ◽  
Saumil N. Merchant ◽  
Roberta L. Bezerra ◽  
Carlos A. Oliveira ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Autosomal Dominant ◽  
Genetic Locus ◽  
Family Members ◽  
Clinical Information ◽  
Disease Genes ◽  
Dominant Trait ◽  
Autosomal Dominant Trait ◽  
Migrainous Vertigo ◽  
Chromosome 5Q35

Objectives: Migrainous vertigo (episodic vertigo associated with migraine) is sometimes inherited as an autosomal dominant trait. However, neither disease genes nor loci that might be responsible have been reported. We sought to map the genetic locus for familial migrainous vertigo in a 4-generation family and to define the progression of disease in this family. Methods: We studied 23 members in a family in whom migrainous vertigo was inherited as an autosomal dominant trait. Clinical information obtained included case histories and results of otolaryngological, neurologic, audiometric, and imaging evaluations. Genome-wide linkage analysis was performed with Affymetrix Genechip Human Mapping 10K microarrays. Genotyping of family members' DNA with microsatellite markers was used to further assess candidate loci identified from the whole-genome scan. Results: Of 23 family members, 10 suffered from migrainous vertigo beginning after 35 years of age. Migraine headaches usually preceded the onset of vertigo by 15 to 20 years. Longitudinal audiometric studies over 12 years showed stable, high-frequency sensorineural hearing loss consistent with presbycusis. Low-frequency or fluctuating hearing loss was not observed. The results of vestibular testing and imaging studies were unremarkable. Genetic analysis defined a 12.0 MB interval on chromosome 5q35 between loci rs244895 and D5S2073 that contained the disease gene (logarithm of odds score, 4.21). Conclusions: We report the first locus for familial migrainous vertigo, which mapped to 5q35.

scholarly journals Prevalence and clinical features of autosomal dominant and recessive TMC1-associated hearing loss

2021 ◽  
Author(s):  
Shin-ya Nishio ◽  
Shin-ichi Usami
Keyword(s):  
Hearing Loss ◽  
Clinical Features ◽  
Autosomal Recessive ◽  
Haplotype Analysis ◽  
Autosomal Dominant ◽  
Founder Mutation ◽  
Family Members ◽  
Causative Gene ◽  
Pathogenic Variants ◽  
Syndromic Hearing Loss

AbstractTMC1 is a causative gene for both autosomal dominant non-syndromic hearing loss (DFNA36) and autosomal recessive non-syndromic hearing loss (DFNB7/11). To date, 125 pathogenic variants in TMC1 have been reported. Most of the TMC1 variants are responsible for autosomal recessive hearing loss, with only 8 variants reported as causative for DFNA36. Here, we reported the prevalence of TMC1-associated hearing loss in a large non-syndromic hearing loss cohort of about 12,000 subjects. As a result, we identified 26 probands with TMC1-associated hearing loss, with the estimated prevalence of TMC1-associated hearing loss in the Japanese hearing loss cohort being 0.17% among all patients. Among the 26 probands with TMC1-associated hearing loss, 15 cases were identified from autosomal dominant hearing loss families. Based on the audiometric data from the probands, family members and previously reported cases, we evaluated hearing deterioration for DFNA36 patients. In addition, we performed haplotype analysis for 11 unrelated autosomal dominant hearing loss families carrying the same variant TMC1: NM_138691:c.1627G > A:p.Asp543Asn. The results clearly indicated that the same haplotype was present despite the families being unrelated, supporting the contention that this variant occurred by founder mutation.

scholarly journals NCOA3 identified as a new candidate to explain autosomal dominant progressive hearing loss

2020 ◽  
Author(s):  
Rodrigo Salazar da Silva ◽  
Vitor Lima Goes Dantas ◽  
Leandro Ucela Alves ◽  
Ana Carla Batissoco ◽  
Jeanne Oiticica ◽  
...  
Keyword(s):  
Hearing Loss ◽  
Autosomal Dominant ◽  
Snp Array ◽  
Large Family ◽  
Sensory Function ◽  
Causative Mutation ◽  
Linkage Data ◽  
Potential Candidate ◽  
Mineral Density ◽  
Progressive Hearing Loss

AbstractHearing loss is a frequent sensory impairment in humans and genetic factors account for an elevated fraction of the cases. We have investigated a large family of five generations, with 15 reported individuals presenting non-syndromic, sensorineural, bilateral and progressive hearing loss, segregating as an autosomal dominant condition. Linkage analysis, using SNP-array and selected microsatellites, identified a region of 13cM in chromosome 20 as the best candidate to harbour the causative mutation. After exome sequencing and filtering of variants, only one predicted deleterious variant in the NCOA3 gene (NM_181659, c.2810C>G; p.Ser937Cys) fit in with our linkage data. RT-PCR, immunostaining and in situ hybridization showed expression of ncoa3 in the inner ear of mice and zebrafish. We generated a stable homozygous zebrafish mutant line using the CRISPR/Cas9 system. ncoa3−/− did not display any major morphological abnormalities in the ear, however, anterior macular hair cells showed altered orientation. Surprisingly, chondrocytes forming the ear cartilage showed abnormal behaviour in ncoa3−/−, detaching from their location, invading the ear canal and blocking the cristae. Adult mutants displayed accumulation of denser material wrapping the otoliths of ncoa3−/− and increased bone mineral density. Altered zebrafish swimming behaviour corroborates a potential role of ncoa3 in hearing loss. In conclusion, we identified a potential candidate gene to explain hereditary hearing loss, and our functional analyses suggest subtle and abnormal skeletal behaviour as mechanisms involved in the pathogenesis of progressive sensory function impairment.

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