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Robijn SMM, Smits JJ, Sezer K, Huygen PLM, Beynon AJ, van Wijk E, Kremer H, de Vrieze E, Lanting CP, Pennings RJE. Genotype-Phenotype Correlations of Pathogenic COCH Variants in DFNA9: A HuGE Systematic Review and Audiometric Meta-Analysis. Biomolecules 2022; 12:220. [PMID: 35204720 PMCID: PMC8961530 DOI: 10.3390/biom12020220] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2021] [Revised: 01/21/2022] [Accepted: 01/23/2022] [Indexed: 02/04/2023] Open
Abstract
Pathogenic missense variants in COCH are associated with DFNA9, an autosomal dominantly inherited type of progressive sensorineural hearing loss with or without vestibular dysfunction. This study is a comprehensive overview of genotype-phenotype correlations using the PRISMA and HuGENet guidelines. Study characteristics, risk of bias, genotyping and data on the self-reported age of onset, symptoms of vestibular dysfunction, normative test results for vestibular function, and results of audiovestibular examinations were extracted for each underlying pathogenic COCH variant. The literature search yielded 48 studies describing the audiovestibular phenotypes of 27 DFNA9-associated variants in COCH. Subsequently, meta-analysis of audiometric data was performed by constructing age-related typical audiograms and by performing non-linear regression analyses on the age of onset and progression of hearing loss. Significant differences were found between the calculated ages of onset and progression of the audiovestibular phenotypes of subjects with pathogenic variants affecting either the LCCL domain of cochlin or the vWFA2 and Ivd1 domains. We conclude that the audiovestibular phenotypes associated with DFNA9 are highly variable. Variants affecting the LCCL domain of cochlin generally lead to more progression of hearing loss when compared to variants affecting the other domains. This review serves as a reference for prospective natural history studies in anticipation of mutation-specific therapeutic interventions.
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Affiliation(s)
- Sybren M. M. Robijn
- Department of Otorhinolaryngology, Hearing & Genes, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (S.M.M.R.); (J.J.S.); (K.S.); (P.L.M.H.); (A.J.B.); (E.v.W.); (E.d.V.); (C.P.L.)
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, 6500 GL Nijmegen, The Netherlands;
| | - Jeroen J. Smits
- Department of Otorhinolaryngology, Hearing & Genes, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (S.M.M.R.); (J.J.S.); (K.S.); (P.L.M.H.); (A.J.B.); (E.v.W.); (E.d.V.); (C.P.L.)
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, 6500 GL Nijmegen, The Netherlands;
- Department of Human Genetics, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Kadriye Sezer
- Department of Otorhinolaryngology, Hearing & Genes, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (S.M.M.R.); (J.J.S.); (K.S.); (P.L.M.H.); (A.J.B.); (E.v.W.); (E.d.V.); (C.P.L.)
| | - Patrick L. M. Huygen
- Department of Otorhinolaryngology, Hearing & Genes, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (S.M.M.R.); (J.J.S.); (K.S.); (P.L.M.H.); (A.J.B.); (E.v.W.); (E.d.V.); (C.P.L.)
| | - Andy J. Beynon
- Department of Otorhinolaryngology, Hearing & Genes, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (S.M.M.R.); (J.J.S.); (K.S.); (P.L.M.H.); (A.J.B.); (E.v.W.); (E.d.V.); (C.P.L.)
| | - Erwin van Wijk
- Department of Otorhinolaryngology, Hearing & Genes, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (S.M.M.R.); (J.J.S.); (K.S.); (P.L.M.H.); (A.J.B.); (E.v.W.); (E.d.V.); (C.P.L.)
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, 6500 GL Nijmegen, The Netherlands;
| | - Hannie Kremer
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, 6500 GL Nijmegen, The Netherlands;
- Department of Human Genetics, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands
| | - Erik de Vrieze
- Department of Otorhinolaryngology, Hearing & Genes, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (S.M.M.R.); (J.J.S.); (K.S.); (P.L.M.H.); (A.J.B.); (E.v.W.); (E.d.V.); (C.P.L.)
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, 6500 GL Nijmegen, The Netherlands;
| | - Cornelis P. Lanting
- Department of Otorhinolaryngology, Hearing & Genes, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (S.M.M.R.); (J.J.S.); (K.S.); (P.L.M.H.); (A.J.B.); (E.v.W.); (E.d.V.); (C.P.L.)
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, 6500 GL Nijmegen, The Netherlands;
| | - Ronald J. E. Pennings
- Department of Otorhinolaryngology, Hearing & Genes, Radboud University Medical Center, 6525 GA Nijmegen, The Netherlands; (S.M.M.R.); (J.J.S.); (K.S.); (P.L.M.H.); (A.J.B.); (E.v.W.); (E.d.V.); (C.P.L.)
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, 6500 GL Nijmegen, The Netherlands;
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Levie C, Moyaert J, Janssens de Varebeke S, Verdoodt D, Vanderveken OM, Topsakal V, Van Wijk E, de Vrieze E, Pennings R, Van de Berg R, Van Camp G, Ponsaerts P, Van Rompaey V. Attitudes of Potential Participants Towards Potential Gene Therapy Trials in Autosomal Dominant Progressive Sensorineural Hearing Loss. Otol Neurotol 2021; 42:384-389. [PMID: 33555744 DOI: 10.1097/mao.0000000000002981] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND Advances in gene therapeutic approaches to treat sensorineural hearing loss (SNHL) confront us with future challenges of translating these animal studies into clinical trials. Little is known on patient attitudes towards future innovative therapies. OBJECTIVE We aimed to better understand the willingness of patients with progressive SNHL and vestibular function loss of autosomal dominant (AD) inheritance to participate in potential gene therapy trials to prevent, stabilize, or slow down hearing loss. METHODS A survey was performed in carriers of the P51S and G88E pathogenic variant in the COCH gene (DFNA9). Various hypothetical scenarios were presented while using a Likert scale. RESULTS Fifty three participants were included, incl. 49 symptomatic patients, one presymptomatic patient, and three participants at risk. Their attitude towards potential trials studying innovative therapies was overall affirmative, even if the treatment would only slow down the decline of hearing and vestibular function, rather than cure the disease. Among the different potential scenarios, the less invasive and less frequent treatments increased the likelihood to enroll. Daily oral medication and annual intravenous infusion were awarded the highest scores. The more invasive, more frequent, and more at-risk treatments were still likely to be accepted but decreased the willingness to participate. The presence of a placebo arm was met with the lowest scores of willingness to participate. CONCLUSIONS Overall, most symptomatic DFNA9 patients would likely consider participation in future innovative inner ear therapy trials, even if it would only slow down the decline of hearing and vestibular function.
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Affiliation(s)
- Camille Levie
- Department of Otorhinolaryngology and Head & Neck surgery, Antwerp University Hospital, Edegem
| | - Julie Moyaert
- Department of Otorhinolaryngology and Head & Neck surgery, Antwerp University Hospital, Edegem
| | - Sebastien Janssens de Varebeke
- Department of Otorhinolaryngology and Head & Neck Surgery, Jessa Hospital, Hasselt
- Department of Translational Neurosciences, Faculty of Medicine and Health Sciences
| | - Dorien Verdoodt
- Department of Translational Neurosciences, Faculty of Medicine and Health Sciences
| | - Olivier M Vanderveken
- Department of Otorhinolaryngology and Head & Neck surgery, Antwerp University Hospital, Edegem
- Department of Translational Neurosciences, Faculty of Medicine and Health Sciences
| | - Vedat Topsakal
- Department of Otorhinolaryngology and Head & Neck surgery, Antwerp University Hospital, Edegem
- Department of Translational Neurosciences, Faculty of Medicine and Health Sciences
| | - Erwin Van Wijk
- Department of Otorhinolaryngology
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen
| | - Erik de Vrieze
- Department of Otorhinolaryngology
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen
| | - Ronald Pennings
- Department of Otorhinolaryngology
- Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen
| | - Raymond Van de Berg
- Division of Balance Disorders, Department of ENT, Maastricht University Medical Centre, Maastricht, The Netherlands
- Faculty of Physics, Tomsk State University, Tomsk, Russia
| | - Guy Van Camp
- Centre of Medical Genetics, University of Antwerp and Antwerp University Hospital
| | - Peter Ponsaerts
- Laboratory of Experimental Hematology, Faculty of Medicine and Health Sciences, Vaccine and Infectious Disease Institute (VaxInfectio), University of Antwerp, Antwerp, Belgium
| | - Vincent Van Rompaey
- Department of Otorhinolaryngology and Head & Neck surgery, Antwerp University Hospital, Edegem
- Department of Translational Neurosciences, Faculty of Medicine and Health Sciences
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Van Rompaey V. Making the Case for Research on Disease-Modifying Treatments to Tackle Post-lingual Progressive Sensorineural Hearing Loss. Front Neurol 2020; 11:290. [PMID: 32373054 PMCID: PMC7186466 DOI: 10.3389/fneur.2020.00290] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2020] [Accepted: 03/26/2020] [Indexed: 01/10/2023] Open
Abstract
Hearing loss not only has a significant impact on the quality of life of patients and society, but its correlation with cognitive decline in an aging population will also increase the risk of incident dementia. While current management of hearing loss is focused on hearing rehabilitation (and essentially symptomatic), patients are suffering from the burden of progressive hearing loss before hearing aids or cochlear implants are fitted. Although these devices have a significant effect on speech understanding, they do not always lead to normal speech understanding, especially in noisy environments. A significant number of patients suffer from autosomal dominantly inherited disorders that can produce progressive sensorineural hearing loss. This includes DFNA9, a disorder caused by pathologic variants in the COCH gene that leads to post-lingual profound sensorineural hearing loss and bilateral vestibulopathy. Carriers of a pathogenic variant leading to DFNA9 can be diagnosed at the pre-symptomatic or early symptomatic stage which creates a window of opportunity for treatment. Preventing hearing loss from occurring or stabilizing progression would provide the opportunity to avoid hearing aids or cochlear implants and would be able to reduce the increased incidence of dementia. While innovative therapies for restoration of hearing have been studied for restoration of hearing in case of severe-to-profound sensorineural hearing loss and congenital hearing loss, further research is needed to study how we can modify disease progression in late-onset autosomal dominant hereditary sensorineural hearing loss. Recently, gene editing strategies have been explored in autosomal dominant disorders to disrupt dominant mutations selectively without affecting wild-type alleles.
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Affiliation(s)
- Vincent Van Rompaey
- Department of Otorhinolaryngology and Head & Neck Surgery, Antwerp University Hospital, Edegem, Belgium
- Department of Translational Neurosciences, Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
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De Belder J, Matthysen S, Claes AJ, Mertens G, Van de Heyning P, Van Rompaey V. Does Otovestibular Loss in the Autosomal Dominant Disorder DFNA9 Have an Impact of on Cognition? A Systematic Review. Front Neurosci 2018; 11:735. [PMID: 29375286 PMCID: PMC5767272 DOI: 10.3389/fnins.2017.00735] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Accepted: 12/18/2017] [Indexed: 12/21/2022] Open
Abstract
Background and Purpose: Cognitive impairment has been observed in patients with bilateral vestibular loss (BVL) and in patients with sensorineural hearing loss (SNHL). DFNA9 is an autosomal dominant disorder that causes a combination of both sensory deficits by the 3rd to 5th decade. We therefore hypothesize a combined detrimental effect on cognition. The aim of this systematic review was to identify studies related to DFNA9 in general and its relationship with cognitive impairment more specifically. Materials and Methods: Several databases including Medline, Cochrane Database of Systematic Reviews, Cochrane Central Register of Controlled Trials, ISI Web of Knowledge, and Web of Science were searched to accumulate information about DFNA9-mutations, including phenotype, genotype, pathophysiology, quality of life (QOL), and imaging in general and cognitive function more specifically. A qualitative analysis was performed on the 55 articles that qualified. Results: The clinical features of DFNA9 are different along the 24 COCH mutations, described up to now. Vestibular symptoms generally present themselves a few years after SNHL onset in mutations associated with the vWFA-domain although they can precede SNHL onset in other mutations associated with the LCCL-domain. QoL has not been studied extensively in DFNA9, although scarce work is available on the positive impact of cochlear implantation to rehabilitate hearing. No studies were found evaluating cognition in DFNA9 patients. Conclusion: Although cognitive impairment has been demonstrated in patients with hearing loss as well as in patients with BVL, no studies have been reported on the combination of both sensory deficits, such as in DFNA9. Further research is warranted to correlate otovestibular status with cognition.
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Affiliation(s)
- Jonas De Belder
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Stijn Matthysen
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium
| | - Annes J Claes
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium.,Department of Otorhinolaryngology and Head and Neck Surgery, Antwerp University Hospital, Edegem, Belgium
| | - Griet Mertens
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium.,Department of Otorhinolaryngology and Head and Neck Surgery, Antwerp University Hospital, Edegem, Belgium
| | - Paul Van de Heyning
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium.,Department of Otorhinolaryngology and Head and Neck Surgery, Antwerp University Hospital, Edegem, Belgium
| | - Vincent Van Rompaey
- Faculty of Medicine and Health Sciences, University of Antwerp, Antwerp, Belgium.,Department of Otorhinolaryngology and Head and Neck Surgery, Antwerp University Hospital, Edegem, Belgium
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Qing J, Yan D, Zhou Y, Liu Q, Wu W, Xiao Z, Liu Y, Liu J, Du L, Xie D, Liu XZ. Whole-exome sequencing to decipher the genetic heterogeneity of hearing loss in a Chinese family with deaf by deaf mating. PLoS One 2014; 9:e109178. [PMID: 25289672 PMCID: PMC4188603 DOI: 10.1371/journal.pone.0109178] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Accepted: 08/13/2014] [Indexed: 01/12/2023] Open
Abstract
Inherited deafness has been shown to have high genetic heterogeneity. For many decades, linkage analysis and candidate gene approaches have been the main tools to elucidate the genetics of hearing loss. However, this associated study design is costly, time-consuming, and unsuitable for small families. This is mainly due to the inadequate numbers of available affected individuals, locus heterogeneity, and assortative mating. Exome sequencing has now become technically feasible and a cost-effective method for detection of disease variants underlying Mendelian disorders due to the recent advances in next-generation sequencing (NGS) technologies. In the present study, we have combined both the Deafness Gene Mutation Detection Array and exome sequencing to identify deafness causative variants in a large Chinese composite family with deaf by deaf mating. The simultaneous screening of the 9 common deafness mutations using the allele-specific PCR based universal array, resulted in the identification of the 1555A>G in the mitochondrial DNA (mtDNA) 12S rRNA in affected individuals in one branch of the family. We then subjected the mutation-negative cases to exome sequencing and identified novel causative variants in the MYH14 and WFS1 genes. This report confirms the effective use of a NGS technique to detect pathogenic mutations in affected individuals who were not candidates for classical genetic studies.
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Affiliation(s)
- Jie Qing
- Department of Otolaryngology-Head and Neck Surgery, Institute of Otology, the Second Xiangya Hospital, Central South University, Changsha, Hunan, China
- Departments of Otolaryngology-Head and Neck Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, United States of America
| | - Denise Yan
- Departments of Otolaryngology-Head and Neck Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, United States of America
| | - Yuan Zhou
- Department of Otolaryngology-Head and Neck Surgery, Institute of Otology, the Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Qiong Liu
- Departments of Otolaryngology-Head and Neck Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, United States of America
| | - Weijing Wu
- Department of Otolaryngology-Head and Neck Surgery, Institute of Otology, the Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Zian Xiao
- Department of Otolaryngology-Head and Neck Surgery, Institute of Otology, the Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yuyuan Liu
- Department of Otolaryngology-Head and Neck Surgery, Institute of Otology, the Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Jia Liu
- Department of Otolaryngology-Head and Neck Surgery, Institute of Otology, the Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Lilin Du
- Departments of Otolaryngology-Head and Neck Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, United States of America
| | - Dinghua Xie
- Department of Otolaryngology-Head and Neck Surgery, Institute of Otology, the Second Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xue Zhong Liu
- Department of Otolaryngology-Head and Neck Surgery, Institute of Otology, the Second Xiangya Hospital, Central South University, Changsha, Hunan, China
- Departments of Otolaryngology-Head and Neck Surgery, Leonard M. Miller School of Medicine, University of Miami, Miami, Florida, United States of America
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PENNINGS RONALDJE, HUYGEN PATRICKLM, CAMP GUYVAN, CREMERS CORWRJ. A Review of Progressive Phenotypes in Nonsyndromic Autosomal Dominant Hearing Impairment. ACTA ACUST UNITED AC 2009. [DOI: 10.1080/16513860310003085] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Wang QJ, Rao SQ, Zhao YL, Liu QJ, Zong L, Han MK, Han DY, Yang WY. The large Chinese family with Y-linked hearing loss revisited: clinical investigation. Acta Otolaryngol 2009; 129:638-43. [PMID: 18720061 DOI: 10.1080/00016480802216347] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
CONCLUSION The DFNY1 phenotypes shared many characteristics with some autosomal dominant hearing loss, in the aspects of age of onset, severity and audiometric configuration. However, the typical, outstanding feature of this trait was its remarkable pattern of inheritance. Similar traits, if ever encountered, can be most easily identified by discerning this exceptional and rare pattern of inheritance. OBJECTIVES To analyze the audiological features in Chinese Y-linked non-syndromic hearing impairment, the extended DFNY1 family. SUBJECTS AND METHODS A nine-generation Chinese family (DFNY1) was ascertained and expanded from the year of 2000 to 2006. The audiometric evaluations included pure-tone audiometry, tympanometry, and auditory brainstem responses. Some subjects received computerized tomography scan of the temporal bone. RESULTS 52 out of 276 members in this family received clinical examinations. 24 live subjects had hearing impairment consisting of 23 patrilineal males and one female. In the affected lineage, 92% patrilineal males were well characterized as having hearing loss and 2 children remained to be diagnosed. Based on the audiological examinations on the male members, the degree of hearing loss was from mild (3 patients), moderate (7 patients) to severe (11 patients). The audiometry displayed 48% subjects with sloping in high frequencies, 38% flat in all frequencies, and the rest (14%) the U-shape. The age of onset ranged from 5-27 years with the average of 11.5 years.
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Picciani R, Desai K, Guduric-Fuchs J, Cogliati T, Morton CC, Bhattacharya SK. Cochlin in the eye: functional implications. Prog Retin Eye Res 2007; 26:453-69. [PMID: 17662637 PMCID: PMC2064858 DOI: 10.1016/j.preteyeres.2007.06.002] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Aqueous humor is actively produced in the ciliary epithelium of the anterior chamber and has important functions for the eye. Under normal physiological conditions, the inflow and outflow of the aqueous humor are tightly regulated, but in the pathologic state this balance is lost. Aqueous outflow involves structures of the anterior chamber and experiences most resistance at the level of the trabecular meshwork (TM) that acts as a filter. The modulation of the TM structure regulates the filter and its mechanism remains poorly understood. Proteomic analyses have identified cochlin, a protein of poorly understood function, in the glaucomatous TM but not in healthy control TM from human cadaver eyes. The presence of cochlin has subsequently been confirmed by Western and immunohistochemical analyses. Functionally, cochlin undergoes multimerization induced by shear stress and other changes in the microenvironment. Cochlin along with mucopolysaccharide deposits has been found in the TM of glaucoma patients and in the inner ear of subjects affected by the hearing disorder DNFA9, a late-onset, progressive disease that also involves alterations in fluid shear regimes. In vitro, cochlin induces aggregation of primary TM cells suggesting a role in cell adhesion, possibly in mechanosensation, and in modulation of the TM filter.
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Affiliation(s)
- Renata Picciani
- Bascom Palmer Eye Institute, University of Miami, Miami, Florida, 33136
| | - Kavita Desai
- Bascom Palmer Eye Institute, University of Miami, Miami, Florida, 33136
| | - Jasenka Guduric-Fuchs
- Centre for Vision Sciences, Queen's University School of Biomedical Sciences, BELFAST BT12 6BA, UK
| | - Tiziana Cogliati
- Centre for Vision Sciences, Queen's University School of Biomedical Sciences, BELFAST BT12 6BA, UK
| | - Cynthia C. Morton
- Harvard Medical School, Brigham and Women's Hospital New Research Building, Room 160D, 77 Avenue Louis Pasteur, Boston, MA 02115
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Tsai HT, Wang YP, Chung SF, Lin HC, Ho GM, Shu MT. A novel mutation in the WFS1 gene identified in a Taiwanese family with low-frequency hearing impairment. BMC MEDICAL GENETICS 2007; 8:26. [PMID: 17517145 PMCID: PMC1890544 DOI: 10.1186/1471-2350-8-26] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/28/2006] [Accepted: 05/22/2007] [Indexed: 11/30/2022]
Abstract
Background Wolfram syndrome gene 1 (WFS1) accounts for most of the familial nonsyndromic low-frequency sensorineural hearing loss (LFSNHL) which is characterized by sensorineural hearing losses equal to and below 2000 Hz. The current study aimed to contribute to our understanding of the molecular basis of LFSNHL in an affected Taiwanese family. Methods The Taiwanese family with LFSNHL was phenotypically characterized using audiologic examination and pedigree analysis. Genetic characterization was performed by direct sequencing of WFS1 and mutation analysis. Results Pure tone audiometry confirmed that the family members affected with LFSNHL had a bilateral sensorineural hearing loss equal to or below 2000 Hz. The hearing loss threshold of the affected members showed no progression, a characteristic that was consistent with a mutation in the WFS1 gene located in the DFNA6/14/38 locus. Pedigree analysis showed a hereditarily autosomal dominant pattern characterized by a full penetrance. Among several polymorphisms, a missense mutation Y669H (2005T>C) in exon 8 of WFS1 was identified in members of a Taiwanese family diagnosed with LFSNHL but not in any of the control subjects. Conclusion We discovered a novel heterozygous missense mutation in exon 8 of WFS1 (i.e., Y669H) which is likely responsible for the LFSNHL phenotype in this particular Taiwanese family.
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Affiliation(s)
- Hsun-Tien Tsai
- Department of Otolaryngology, Mackay Memorial Hospital, 92, Section 2, Chungshan North Road, Taipei, Taiwan
- Department of Medical Research, Mackay Memorial Hospital, 45, Minsheng Road, Tamshui, Taipei, Taiwan
- Department of Speech and Hearing Disorders and Sciences, National Taipei College of Nursing, 89 Nei-Chiang Street, Wanhua, Taipei, Taiwan
| | - Ying-Piao Wang
- Department of Otolaryngology, Mackay Memorial Hospital, 92, Section 2, Chungshan North Road, Taipei, Taiwan
| | - Shing-Fang Chung
- Department of Medical Research, Mackay Memorial Hospital, 45, Minsheng Road, Tamshui, Taipei, Taiwan
| | - Hung-Ching Lin
- Department of Otolaryngology, Mackay Memorial Hospital, 92, Section 2, Chungshan North Road, Taipei, Taiwan
- Department of Speech and Hearing Disorders and Sciences, National Taipei College of Nursing, 89 Nei-Chiang Street, Wanhua, Taipei, Taiwan
| | - Guan-Min Ho
- Department of Otolaryngology, Mackay Memorial Hospital, 92, Section 2, Chungshan North Road, Taipei, Taiwan
| | - Min-Tsan Shu
- Department of Otolaryngology, Mackay Memorial Hospital, 92, Section 2, Chungshan North Road, Taipei, Taiwan
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Mhatre AN, Li Y, Atkin G, Maghnouj A, Lalwani AK. Expression of Myh9 in the mammalian cochlea: Localization within the stereocilia. J Neurosci Res 2006; 84:809-18. [PMID: 16862555 DOI: 10.1002/jnr.20993] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Mutations of non-muscle myosin Type IIA or MYH9 are linked to syndromic or nonsyndromic hearing loss. The biologic function of MYH9 in the auditory organ and the pathophysiology of its dysfunction remain to be determined. The mouse represents an excellent model for investigating the biologic role of MYH9 in the cells and tissues affected by its dysfunction. A primary step toward the understanding of the role of MYH9 in hearing and its dysfunction is the documentation of its cellular and sub-cellular localization within the cochlea, the auditory organ. We describe the localization of Myh9 within the mouse cochlea using a polyclonal anti-Myh9-antibody, generated against an 18 amino acid long peptide corresponding to the sequence at the C-terminus of mouse Myh9. The anti-Myh9 antibody identified a single, specific, immunoreactive band of 220 kDa in immunoblot analysis of homogenate from a variety of different mouse tissues. The Myh9 antibody cross-reacts with the rat but not the human orthologue. Myh9 is expressed predominantly within the spiral ligament as well as in the sensory hair cells of the organ of Corti. Confocal microscopy of cochlear surface preparations, identified Myh9 within the inner and outer hair cells and their stereocilia. Localization of Myh9 within the stereocilia raises the possibility that mutations of MYH9 may effect hearing loss though disruption of the stereocilia structure.
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Affiliation(s)
- Anand N Mhatre
- Laboratory of Molecular Otology, Department of Otolaryngology, New York University School of Medicine, New York, New York 10016, USA.
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Yan D, Ke X, Blanton SH, Ouyang XM, Pandya A, Du LL, Nance WE, Liu XZ. A novel locus for autosomal dominant non-syndromic deafness, DFNA53, maps to chromosome 14q11.2-q12. J Med Genet 2005; 43:170-4. [PMID: 15958501 PMCID: PMC2564639 DOI: 10.1136/jmg.2005.034710] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Non-syndromic hearing loss is among the most genetically heterogeneous traits known in humans. To date, at least 50 loci for autosomal dominant non-syndromic sensorineural hearing loss (ADNSSHL) have been identified by linkage analysis. OBJECTIVE To report the mapping of a novel autosomal dominant deafness locus on the long arm of chromosome 14 at 14q11.2-q12, DFNA53, in a large multigenerational Chinese family with post-lingual, high frequency hearing loss that progresses to involve all frequencies. RESULTS A maximum multipoint LOD score of 5.4 was obtained for marker D14S1280. The analysis of recombinant haplotypes mapped DFNA53 to a 9.6 cM region interval between markers D14S581 and D14S1021. Four deafness loci (DFNA9, DFNA23, DFNB5, and DFNB35) have previously been mapped to the long arm of chromosome 14. The critical region for DFNA53 contains the gene for DFNA9 but does not overlap with the regions for DFNB5, DFNA23, or DFNB35. Screening of the COCH gene (DFNA9), BOCT, EFS, and HSPC156 within the DFNA53 interval did not identify the cause for deafness in this family. CONCLUSIONS Identifying the DFNA53 locus is the first step in isolating the gene responsible for hearing loss in this large multigeneration Chinese family.
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Bhattacharya SK, Rockwood EJ, Smith SD, Bonilha VL, Crabb JS, Kuchtey RW, Robertson NG, Peachey NS, Morton CC, Crabb JW. Proteomics reveal Cochlin deposits associated with glaucomatous trabecular meshwork. J Biol Chem 2004; 280:6080-4. [PMID: 15579465 PMCID: PMC1483217 DOI: 10.1074/jbc.m411233200] [Citation(s) in RCA: 122] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The etiology of primary open angle glaucoma, a leading cause of age-related blindness, remains poorly defined, although elevated intraocular pressure (IOP) contributes to the disease progression. To better understand the mechanisms causing elevated IOP from aqueous humor circulation, we pursued proteomic analyses of trabecular meshwork (TM) from glaucoma and age-matched control donors. These analyses demonstrated that Cochlin, a protein associated with deafness disorder DFNA9, is present in glaucomatous but absent in normal TM. Cochlin was also detected in TM from the glaucomatous DBA/2J mouse preceding elevated IOP but found to be absent in three other mouse lines that do not develop elevated IOP. Histochemical analyses revealed co-deposits of Cochlin and mucopolysaccharide in human TM around Schlemm's canal, similar to that observed in the cochlea in DFNA9 deafness. Purified Cochlin was found to aggregate after sheer stress and to induce the aggregation of TM cells in vitro. Age-dependent in vivo increases in Cochlin were observed in glaucomatous TM, concomitant with a decrease in type II collagen, suggesting that Cochlin may disrupt the TM architecture and render components like collagen more susceptible to degradation and collapse. Overall, these observations suggest that Cochlin contributes to elevated IOP in primary open angle glaucoma through altered interactions within the TM extracellular matrix, resulting in cell aggregation, mucopolysaccharide deposition, and significant obstruction of the aqueous humor circulation.
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Affiliation(s)
- Sanjoy K Bhattacharya
- Cole Eye Institute and Lerner Research Institute (i31), Cleveland Clinic Foundation, Cleveland, OH 44195, USA.
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Bom SJH, Van Camp G, Cryns K, Admiraal RJC, Huygen PLM, Cremers CWRJ. Autosomal dominant low-frequency hearing impairment (DFNA6/14): a clinical and genetic family study. Otol Neurotol 2002; 23:876-84. [PMID: 12438850 DOI: 10.1097/00129492-200211000-00012] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
OBJECTIVE To delineate the phenotype and genotype of an autosomal dominant low-frequency sensorineural nonsyndromic hearing impairment trait in relation to similar traits. STUDY DESIGN Family study, including retrospective case reviews. SETTING Tertiary referral center. PATIENTS Hearing impairment was documented in 11 family members in five generations, 8 of whom were alive and participated in this study. INTERVENTION Diagnostic. MAIN OUTCOME MEASURES Clinical study: medical and otologic history and examination, retrieval of previous audiograms, pure-tone audiometry, and statistical analysis of audiometric data. Genetic study: linkage analysis of blood samples in 18 clinically affected and nonaffected family members. RESULTS Hearing impairment had been present since early childhood, mainly affecting the low frequencies (mean threshold 45 dB HL at 0.25-1 kHz); speech recognition was hardly affected during the first three decades of life. Higher frequencies became involved with increasing age, thus causing a flat-type audiogram at middle age and down-sloping audiograms after age 60 years. Progression was mild but significant at all frequencies (0.5 dB/year at 0.25 kHz to 1.3 dB/year at 8 kHz) and persisted after correction was applied for normal presbyacusis. The trait was linked to chromosome 4p16.3, in a region comprising both the previously located, closely adjacent DFNA6 and the DFNA14 loci for low-frequency hearing impairment. CONCLUSION A third family (designated Dutch II) was identified with a low-frequency hearing impairment trait showing linkage to chromosome 4p16.3 (DFNA6/14). The progression of hearing impairment beyond presbyacusis in the current study is unprecedented for DFNA6/14 traits.
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Affiliation(s)
- Steven J H Bom
- Department of Otorhinolaryngology, University Medical Center, St. Radboud, Nijmegen, The Netherlands.
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Oeken J, Stumpf R, Bootz F. DPOAEs and vestibular function in different types of autosomal-dominant non-syndromal hearing impairment. Auris Nasus Larynx 2002; 29:29-34. [PMID: 11772487 DOI: 10.1016/s0385-8146(01)00119-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND/OBJECTIVE The application of distortion-product otoacoustic emissions (DPOAE) could be advantageous in the early diagnostic of descendants of families with autosomal-dominant non-syndromal hearing impairment (ADNSHI). PATIENTS/METHODS DP-grams of 58 affected persons of 21 families with ADNSHI were measured (f(2)/f(1)=1.22; L(1)=70 dB SPL; L(2)=65 dB SPL; four points per octave). The mode of transmission was determined by pedigree. The phenotype was determined by pure tone audiometry (PTA) and caloric vestibular test (CVT). RESULTS We could find 12 families with mild to severe mid-frequency U-shaped ADNSHI, three families with steeply sloping high tone ADNSHI, two families with moderate to severe gently sloping high tone ADNSHI, three families with profound ADNSHI and one family with variable ADNSHI. One family showed an additional vestibular lesion. Fifty-six of 58 affected persons showed pathological DP-grams. In 48 persons (83%) these DP-grams showed distinct similarity within the families, that they could be classified as "ADNSHI-typical" within an affected family. CONCLUSIONS Affected persons of a family with ADNSHI show similar DP-grams. These DP-grams are useful in the early routine-diagnostics of newborns within such families.
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Affiliation(s)
- Jens Oeken
- ENT-Department, Universitäts-HNO-Klinik, University of Leipzig, Liebigstr. 18a, D-04103 Leipzig, Germany.
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Verhagen WI, Bom SJ, Fransen E, Van Camp G, Huygen PL, Theunissen EJ, Cremers CW. Hereditary cochleovestibular dysfunction due to a COCH gene mutation (DFNA9): a follow-up study of a family. CLINICAL OTOLARYNGOLOGY AND ALLIED SCIENCES 2001; 26:477-83. [PMID: 11843927 DOI: 10.1046/j.1365-2273.2001.00505.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Cochleovestibular impairment was evaluated, in relation to age, in a longitudinal follow-up study on a Dutch family with a DFNA9 trait caused by a Pro51Ser mutation in the COCH gene on chromosome 14q12-q13. Fourteen cases were genotyped. The onset age of progressive impairment reported by the mutation carriers was between age 35 and 45 years. Pure-tone thresholds deteriorated by about 2-7 dB per year (mean 3.8 dB per year) in a variable, often asymmetrical, fashion. One mutation carrier developed recurrent episodes of vertigo accompanied by nausea and vomiting, resembling Ménière's disease. Two others developed special susceptibility for motion sickness and appeared to have a hyperactive vestibulo-ocular reflex. More advanced stages of vestibular impairment, i.e. vestibular hyporeflexia and complete vestibular areflexia, were eventually found in a number of cases. DFNA9/COCH should be considered as a possible cause in patients developing combined progressive cochlear and vestibular impairment, or suspected hereditary Ménière-like disease, from around middle age.
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Affiliation(s)
- W I Verhagen
- Department of Neurology, Canisius-Wilhelmina Hospital, Nijmegen, The Netherlands.
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Hurle B, Lane K, Kenney J, Tarantino LM, Bucan M, Brownstein BH, Ornitz DM. Physical mapping of the mouse tilted locus identifies an association between human deafness loci DFNA6/14 and vestibular system development. Genomics 2001; 77:189-99. [PMID: 11597144 DOI: 10.1006/geno.2001.6632] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The tilted (tlt) mouse carries a recessive mutation causing vestibular dysfunction. The defect in tlt homozygous mice is limited to the utricle and saccule of the inner ear, which completely lack otoconia. Genetic mapping of tlt placed it in a region orthologous with human 4p16.3-p15 that contains two loci, DFNA6 and DFNA14, responsible for autosomal dominant, nonsyndromic hereditary hearing impairment. To identify a possible relationship between tlt in mice and DFNA6 and DFNA14 in humans, we have refined the mouse genetic map, assembled a BAC contig spanning the tlt locus, and developed a comprehensive comparative map between mouse and human. We have determined the position of tlt relative to 17 mouse chromosome 5 genes with orthologous loci in the human 4p16.3-p15 region. This analysis identified an inversion between the mouse and human genomes that places tlt and DFNA6/14 in close proximity.
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Affiliation(s)
- B Hurle
- Department of Molecular Biology and Pharmacology, Washington University School of Medicine, 660 South Euclid Ave., St. Louis, Missouri 63110, USA
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Mangino M, Flex E, Capon F, Sangiuolo F, Carraro E, Gualandi F, Mazzoli M, Martini A, Novelli G, Dallapiccola B. Mapping of a new autosomal dominant nonsyndromic hearing loss locus (DFNA30) to chromosome 15q25-26. Eur J Hum Genet 2001; 9:667-71. [PMID: 11571554 DOI: 10.1038/sj.ejhg.5200707] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2001] [Revised: 06/29/2001] [Accepted: 07/03/2001] [Indexed: 11/10/2022] Open
Abstract
Hearing impairment is the most common inherited human sensory defect. Nonsyndromic Hearing Impairment (NSHI) is the most genetically heterogeneous trait known. Over 70 loci have been mapped and a total of 19 genes have been identified. We report here a novel locus (DFNA 30) for autosomal dominant NSHI that we mapped to chromosome 15q25-26 in an Italian four-generation family. The haplotype analysis has identified a critical interval of 18 cM between markers D15S151 and D15S130. This region does not overlap with DFNB16 locus but partially coincides with the otosclerosis (OTS) locus. Localisation of the locus DFNA30 is a first step towards the identification of the gene.
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Affiliation(s)
- M Mangino
- CSS Mendel Institute, IRCCS, Rome, Italy
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