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Bernardinelli E, Huber F, Roesch S, Dossena S. Clinical and Molecular Aspects Associated with Defects in the Transcription Factor POU3F4: A Review. Biomedicines 2023; 11:1695. [PMID: 37371790 DOI: 10.3390/biomedicines11061695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 06/07/2023] [Accepted: 06/08/2023] [Indexed: 06/29/2023] Open
Abstract
X-linked deafness (DFNX) is estimated to account for up to 2% of cases of hereditary hearing loss and occurs in both syndromic and non-syndromic forms. POU3F4 is the gene most commonly associated with X-linked deafness (DFNX2, DFN3) and accounts for about 50% of the cases of X-linked non-syndromic hearing loss. This gene codes for a transcription factor of the POU family that plays a major role in the development of the middle and inner ear. The clinical features of POU3F4-related hearing loss include a pathognomonic malformation of the inner ear defined as incomplete partition of the cochlea type 3 (IP-III). Often, a perilymphatic gusher is observed upon stapedectomy during surgery, possibly as a consequence of an incomplete separation of the cochlea from the internal auditory canal. Here we present an overview of the pathogenic gene variants of POU3F4 reported in the literature and discuss the associated clinical features, including hearing loss combined with additional phenotypes such as cognitive and motor developmental delays. Research on the transcriptional targets of POU3F4 in the ear and brain is in its early stages and is expected to greatly advance our understanding of the pathophysiology of POU3F4-linked hearing loss.
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Affiliation(s)
- Emanuele Bernardinelli
- Institute of Pharmacology and Toxicology, Paracelsus Medical University, 5020 Salzburg, Austria
| | - Florian Huber
- Institute of Pharmacology and Toxicology, Paracelsus Medical University, 5020 Salzburg, Austria
| | - Sebastian Roesch
- Department of Otorhinolaryngology, Head and Neck Surgery, Paracelsus Medical University, 5020 Salzburg, Austria
| | - Silvia Dossena
- Institute of Pharmacology and Toxicology, Paracelsus Medical University, 5020 Salzburg, Austria
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2
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Di Maro F, Sykopetrites V, Meli A, Cocozza D, Albanese G, Miccoli MTA, De Candia A, Picozzi M, Greco F, Cristofari E. A New Treatment Option in Incomplete Partition Type III: The Varese Bone-Air Stimulation (B.A.S.). J Pers Med 2023; 13:jpm13040681. [PMID: 37109067 PMCID: PMC10147035 DOI: 10.3390/jpm13040681] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Revised: 04/07/2023] [Accepted: 04/17/2023] [Indexed: 04/29/2023] Open
Abstract
The incomplete partition type III is a severe cochlear malformation present in X-linked deafness. It is a rare, non-syndromic cause of severe to profound mixed hearing loss, often progressive. The complete absence of bony modiolus and the wide communication between the cochlea and the internal auditory canal make cochlear implantation challenging, with still no consensus on the management of these patients. To the best of our knowledge, no results have ever been published in the literature on the treatment of these patients with hybrid stimulation (bone and air). We present three cases in which this hybrid stimulation gave better audiological results then air stimulation alone. A literature review on audiological results of the current treatment options in children affected by IPIII malformation was conducted independently by two researchers. Ethical considerations on the treatment of these patients were conducted by the Bioethics department of the University of Insubria. In two of the patients, the bone-air stimulation, associated with prosthetic-cognitive rehabilitation, meant that surgery was avoided, obtaining similar communication performances of those present in the literature. We believe that, when the bone threshold appears partially preserved, a stimulation through the bone or hybrid modality, such as the Varese B.A.S. stimulation, should be attempted.
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Affiliation(s)
- Flavia Di Maro
- Audiovestibology Unit Varese Hospital, 21100 Varese, Italy
| | | | - Annalisa Meli
- Audiovestibology Unit Varese Hospital, 21100 Varese, Italy
| | - Davide Cocozza
- Audiovestibology Unit Varese Hospital, 21100 Varese, Italy
| | - Greta Albanese
- Audiovestibology Unit Varese Hospital, 21100 Varese, Italy
| | | | | | - Mario Picozzi
- Center for Clinical Ethics, Biotechnology and Science of Life Department, Insubria University, 21100 Varese, Italy
| | - Francesca Greco
- Center for Clinical Ethics, Biotechnology and Science of Life Department, Insubria University, 21100 Varese, Italy
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3
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Sharma N, Kumari D, Panigrahi I, Khetarpal P. A systematic review of the monogenic causes of Non-Syndromic Hearing Loss (NSHL) and discussion of Current Diagnosis and Treatment options. Clin Genet 2023; 103:16-34. [PMID: 36089522 DOI: 10.1111/cge.14228] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 09/02/2022] [Accepted: 09/06/2022] [Indexed: 12/13/2022]
Abstract
Hearing impairment is one of the most widespread inheritable sensory disorder affecting at least 1 in every 1000 born. About two-third of hereditary hearing loss (HHL) disorders are non-syndromic. To provide comprehensive update of monogenic causes of non-syndromic hearing loss (NSHL), literature search has been carried out with appropriate keywords in the following databases-PubMed, Google Scholar, Cochrane library, and Science Direct. Out of 2214 papers, 271 papers were shortlisted after applying inclusion and exclusion criterion. Data extracted from selected papers include information about gene name, identified pathogenic variants, ethnicity of the patient, age of onset, gender, title, authors' name, and year of publication. Overall, pathogenic variants in 98 different genes have been associated with NSHL. These genes have important role to play during early embryonic development in ear structure formation and hearing development. Here, we also review briefly the recent information about diagnosis and treatment approaches. Understanding pathogenic genetic variants are helpful in the management of affected and may offer targeted therapies in future.
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Affiliation(s)
- Nandita Sharma
- Department of Human Genetics and Molecular Medicine, School of Health Sciences, Central University of Punjab, Bathinda, India
| | - Divya Kumari
- Department of Pediatrics Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Inusha Panigrahi
- Department of Pediatrics Medicine, Post Graduate Institute of Medical Education and Research, Chandigarh, India
| | - Preeti Khetarpal
- Department of Human Genetics and Molecular Medicine, School of Health Sciences, Central University of Punjab, Bathinda, India
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4
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Defourny J. Considering gene therapy to protect from X-linked deafness DFNX2 and associated neurodevelopmental disorders. IBRAIN 2022; 8:431-441. [PMID: 37786584 PMCID: PMC10529175 DOI: 10.1002/ibra.12068] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 08/10/2022] [Accepted: 09/13/2022] [Indexed: 10/04/2023]
Abstract
Mutations and deletions in the gene or upstream of the gene encoding the POU3F4 transcription factor cause X-linked progressive deafness DFNX2 and additional neurodevelopmental disorders in humans. Hearing loss can be purely sensorineural or mixed, that is, with both conductive and sensorineural components. Affected males show anatomical abnormalities of the inner ear, which are jointly defined as incomplete partition type III. Current approaches to improve hearing and speech skills of DFNX2 patients do not seem to be fully effective. Owing to inner ear malformations, cochlear implantation is surgically difficult and may predispose towards severe complications. Even in cases where implantation is safely performed, hearing and speech outcomes remain highly variable among patients. Mouse models for DFNX2 deafness revealed that sensorineural loss could arise from a dysfunction of spiral ligament fibrocytes in the lateral wall of the cochlea, which leads to reduced endocochlear potential. Highly positive endocochlear potential is critical for sensory hair cell mechanotransduction and hearing. In this context, here, we propose to develop a therapeutic approach in male Pou3f4 -/y mice based on an adeno-associated viral (AAV) vector-mediated gene transfer in cochlear spiral ligament fibrocytes. Among a broad range of AAV vectors, AAV7 was found to show a strong tropism for the spiral ligament. Thus, we suggest that an AAV7-mediated delivery of Pou3f4 complementary DNA in the spiral ligament of Pou3f4 -/y mice could represent an attractive strategy to prevent fibrocyte degeneration and to restore normal cochlear functions and properties, including a positive endocochlear potential, before hearing loss progresses to profound deafness.
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Affiliation(s)
- Jean Defourny
- GIGA‐Neurosciences, Unit of Cell and Tissue BiologyUniversity of Liège, C.H.U. B36LiègeBelgium
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5
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Tekin AM, Matulic M, Wuyts W, Assadi MZ, Mertens G, van Rompaey V, Li Y, van de Heyning P, Topsakal V. A New Pathogenic Variant in POU3F4 Causing Deafness Due to an Incomplete Partition of the Cochlea Paved the Way for Innovative Surgery. Genes (Basel) 2021; 12:genes12050613. [PMID: 33919129 PMCID: PMC8143104 DOI: 10.3390/genes12050613] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2021] [Revised: 04/09/2021] [Accepted: 04/11/2021] [Indexed: 12/20/2022] Open
Abstract
Incomplete partition type III (IP-III) is a relatively rare inner ear malformation that has been associated with a POU3F4 gene mutation. The IP-III anomaly is mainly characterized by incomplete separation of the modiolus of the cochlea from the internal auditory canal. We describe a 71-year-old woman with profound sensorineural hearing loss diagnosed with an IP-III of the cochlea that underwent cochlear implantation. Via targeted sequencing with a non-syndromic gene panel, we identified a heterozygous c.934G > C p. (Ala31Pro) pathogenic variant in the POU3F4 gene that has not been reported previously. IP-III of the cochlea is challenging for cochlear implant surgery for two main reasons: liquor cerebrospinalis gusher and electrode misplacement. Surgically, it may be better to opt for a shorter array because it is less likely for misplacement with the electrode in a false route. Secondly, the surgeon has to consider the insertion angles of cochlear access very strictly to avoid misplacement along the inner ear canal. Genetic results in well describes genotype-phenotype correlations are a strong clinical tool and as in this case guided surgical planning and robotic execution.
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Affiliation(s)
- Ahmet M. Tekin
- Department of Otorhinolaryngology, Head and Neck Surgery, Brussels Health Campus, Vrije Universiteit Brussel, 1090 Brussels, Belgium; (A.M.T.); (M.M.)
| | - Marco Matulic
- Department of Otorhinolaryngology, Head and Neck Surgery, Brussels Health Campus, Vrije Universiteit Brussel, 1090 Brussels, Belgium; (A.M.T.); (M.M.)
| | - Wim Wuyts
- Center of Medical Genetics, Faculty of Medicine and Health Sciences, University of Antwerp and Antwerp University Hospital, 2650 Antwerp, Belgium;
| | | | - Griet Mertens
- Department of Otorhinolaryngology, Head and Neck Surgery, Antwerp University Hospital, 2650 Edegem, Belgium; (G.M.); (V.v.R.); (P.v.d.H.)
- Department of Translational Neurosciences, Faculty of Medicine and Health Sciences, University of Antwerp, 2610 Antwerp, Belgium
| | - Vincent van Rompaey
- Department of Otorhinolaryngology, Head and Neck Surgery, Antwerp University Hospital, 2650 Edegem, Belgium; (G.M.); (V.v.R.); (P.v.d.H.)
- Department of Translational Neurosciences, Faculty of Medicine and Health Sciences, University of Antwerp, 2610 Antwerp, Belgium
| | - Yongxin Li
- Department of Otolaryngology, Head and Neck Surgery, Capital Medical University, Beijing 100730, China;
| | - Paul van de Heyning
- Department of Otorhinolaryngology, Head and Neck Surgery, Antwerp University Hospital, 2650 Edegem, Belgium; (G.M.); (V.v.R.); (P.v.d.H.)
- Department of Translational Neurosciences, Faculty of Medicine and Health Sciences, University of Antwerp, 2610 Antwerp, Belgium
| | - Vedat Topsakal
- Department of Otorhinolaryngology, Head and Neck Surgery, Brussels Health Campus, Vrije Universiteit Brussel, 1090 Brussels, Belgium; (A.M.T.); (M.M.)
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital UZ Brussel, Brussels Health Campus, Vrije Universiteit Brussel, 1090 Brussels, Belgium
- Correspondence: ; Tel.: +32-24776882; Fax: +32-24776880
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6
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Cochlear Implantation in a Patient with a Novel POU3F4 Mutation and Incomplete Partition Type-III Malformation. Neural Plast 2020; 2020:8829587. [PMID: 32952548 PMCID: PMC7481964 DOI: 10.1155/2020/8829587] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Revised: 08/05/2020] [Accepted: 08/24/2020] [Indexed: 01/01/2023] Open
Abstract
Aims This study is aimed at (1) analyzing the clinical manifestations and genetic features of a novel POU3F4 mutation in a nonsyndromic X-linked recessive hearing loss family and (2) reporting the outcomes of cochlear implantation in a patient with this mutation. Methods A patient who was diagnosed as the IP-III malformation underwent cochlear implantation in our hospital. The genetic analysis was conducted in his family, including the whole-exome sequencing combined with Sanger sequencing and bioinformatic analysis. Clinical features, preoperative auditory and speech performances, and postoperative outcomes of cochlear implant (CI) were assessed on the proband and his family. Results A novel variant c.400_401insACTC (p.Q136LfsX58) in the POU3F4 gene was detected in the family, which was cosegregated with the hearing loss. This variant was absent in 200 normal-hearing persons. The phylogenetic analysis and structure modeling of Pou3f4 protein further confirmed that the novel mutation was pathogenic. The proband underwent cochlear implantation on the right ear at four years old and gained greatly auditory and speech improvement. However, the benefits of the CI declined about three and a half years postoperation. Though the right ear had been reimplanted, the outcomes were still worse than before. Conclusion A novel frame shift variant c.400_401insACTC (p.Q136LfsX58) in the POU3F4 gene was identified in a Chinese family with X-linked inheritance hearing loss. A patient with this mutation and IP-III malformation could get good benefits from CI. However, the outcomes of the cochlear implantation might decline as the patient grows old.
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7
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Smith JD, El-Kashlan N, Darr OAF, Thorne MC. Systematic Review of Outcomes After Cochlear Implantation in Children With X-Linked Deafness-2. Otolaryngol Head Neck Surg 2020; 164:19-26. [PMID: 32600118 DOI: 10.1177/0194599820932138] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Outcomes following cochlear implantation in children with X-linked deafness-2 are variable, resulting in challenges in appropriate preoperative counseling. To address this uncertainty, we performed a systematic review and synthesis of the literature on audiologic and speech outcomes after cochlear implantation in these patients to inform prognostic counseling. DATA SOURCES PubMed, Embase, and Cochrane Library were queried for articles published between January 2000 and July 2019. REVIEW METHODS We performed a systematic review of all studies published between 2000 and 2019 that reported on (1) children with confirmed X-linked deafness-2 undergoing cochlear implantation and (2) formal assessment of hearing and/or speech capabilities postimplantation. RESULTS Our initial database search yielded 313 articles. Fourteen articles met inclusion criteria. These studies reported on 61 children with X-linked deafness-2 who underwent implantation at a wide age range (1-29 years) for severe-profound sensorineural hearing loss of prelingual onset. The mean follow-up duration after implant activation was 32 months (range, 12-61). Outcome domains assessed at follow-up were heterogeneous, though each study employed at least 1 assessment of hearing (eg, pure tone audiometry), speech perception (eg, Early Speech Perception Test), or auditory perception (eg, Categories of Auditory Perception scores). In 10 of 14 studies, cochlear implantation afforded significant improvement in hearing and speech capabilities relative to preoperative performance or as compared with age-matched, normal-hearing controls. CONCLUSION The majority of studies demonstrate that cochlear implantation provides improvements in hearing and speech performance in patients with X-linked deafness-2. This information is valuable for decision making regarding cochlear implantation in these patients.
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Affiliation(s)
- Joshua D Smith
- Department of Otolaryngology-Head and Neck Surgery, University of Michigan Medical School, Ann Arbor, Michigan, USA
| | - Nour El-Kashlan
- Department of Otolaryngology-Head and Neck Surgery, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Owen A F Darr
- Department of Pediatric Otolaryngology, Children's Hospital Colorado, Aurora, Colorado, USA
| | - Marc C Thorne
- Department of Otolaryngology-Head and Neck Surgery, University of Michigan Medical School, Ann Arbor, Michigan, USA
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8
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Oza AM, DiStefano MT, Hemphill SE, Cushman BJ, Grant AR, Siegert RK, Shen J, Chapin A, Boczek NJ, Schimmenti LA, Murry JB, Hasadsri L, Nara K, Kenna M, Booth KT, Azaiez H, Griffith A, Avraham KB, Kremer H, Rehm HL, Amr SS, Abou Tayoun AN. Expert specification of the ACMG/AMP variant interpretation guidelines for genetic hearing loss. Hum Mutat 2019; 39:1593-1613. [PMID: 30311386 DOI: 10.1002/humu.23630] [Citation(s) in RCA: 299] [Impact Index Per Article: 59.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Revised: 07/23/2018] [Accepted: 08/25/2018] [Indexed: 12/23/2022]
Abstract
Due to the high genetic heterogeneity of hearing loss (HL), current clinical testing includes sequencing large numbers of genes, which often yields a significant number of novel variants. Therefore, the standardization of variant interpretation is crucial to provide consistent and accurate diagnoses. The Hearing Loss Variant Curation Expert Panel was created within the Clinical Genome Resource to provide expert guidance for standardized genomic interpretation in the context of HL. As one of its major tasks, our Expert Panel has adapted the American College of Medical Genetics and Genomics/Association for Molecular Pathology (ACMG/AMP) guidelines for the interpretation of sequence variants in HL genes. Here, we provide a comprehensive illustration of the newly specified ACMG/AMP HL rules. Three rules remained unchanged, four rules were removed, and the remaining 21 rules were specified. These rules were further validated and refined using a pilot set of 51 variants assessed by curators and disease experts. Of the 51 variants evaluated in the pilot, 37% (19/51) changed category based upon application of the expert panel specified rules and/or aggregation of evidence across laboratories. These HL-specific ACMG/AMP rules will help standardize variant interpretation, ultimately leading to better care for individuals with HL.
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Affiliation(s)
- Andrea M Oza
- Laboratory for Molecular Medicine, Partners Healthcare Personalized Medicine, Cambridge, Massachusetts.,Department of Otolaryngology and Communication Enhancement, Boston Children's Hospital, Boston, Massachusetts
| | - Marina T DiStefano
- Laboratory for Molecular Medicine, Partners Healthcare Personalized Medicine, Cambridge, Massachusetts.,Harvard Medical School, Boston, Massachusetts
| | - Sarah E Hemphill
- Laboratory for Molecular Medicine, Partners Healthcare Personalized Medicine, Cambridge, Massachusetts
| | - Brandon J Cushman
- Laboratory for Molecular Medicine, Partners Healthcare Personalized Medicine, Cambridge, Massachusetts
| | - Andrew R Grant
- Laboratory for Molecular Medicine, Partners Healthcare Personalized Medicine, Cambridge, Massachusetts
| | - Rebecca K Siegert
- Laboratory for Molecular Medicine, Partners Healthcare Personalized Medicine, Cambridge, Massachusetts
| | - Jun Shen
- Laboratory for Molecular Medicine, Partners Healthcare Personalized Medicine, Cambridge, Massachusetts.,Harvard Medical School, Boston, Massachusetts.,Department of Pathology, Brigham & Women's Hospital, Boston, Massachusetts
| | | | - Nicole J Boczek
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
| | - Lisa A Schimmenti
- Department of Otorhinolaryngology, Clinical Genomics and Biochemistry and Molecular Biology, Mayo Clinic, Rochester, Minnesota
| | - Jaclyn B Murry
- Laboratory for Molecular Medicine, Partners Healthcare Personalized Medicine, Cambridge, Massachusetts
| | - Linda Hasadsri
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota
| | - Kiyomitsu Nara
- Division of Hearing and Balance Research, National Institute of Sensory Organs, National Hospital Organization Tokyo Medical Center, Tokyo, Japan
| | - Margaret Kenna
- Department of Otolaryngology and Communication Enhancement, Boston Children's Hospital, Boston, Massachusetts.,Harvard Medical School, Boston, Massachusetts
| | - Kevin T Booth
- Molecular Otolaryngology and Renal Research Laboratories, Department of Otolaryngology, University of Iowa Hospital and Clinics, Iowa City, Iowa.,The Interdisciplinary Graduate Program in Molecular Medicine, Carver College of Medicine, University of Iowa, Iowa City, Iowa
| | - Hela Azaiez
- Molecular Otolaryngology and Renal Research Laboratories, Department of Otolaryngology, University of Iowa Hospital and Clinics, Iowa City, Iowa
| | - Andrew Griffith
- Audiology Unit, National Institute on Deafness and Other Communication Disorders (NIDCD), NIH, Bethesda, Maryland
| | - Karen B Avraham
- Department of Human Molecular Genetics and Biochemistry, Sackler Faculty of Medicine and Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
| | - Hannie Kremer
- Department of Otorhinolaryngology and Department of Human Genetics, Donders Institute for Brain, Cognition and Behaviour, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Heidi L Rehm
- Laboratory for Molecular Medicine, Partners Healthcare Personalized Medicine, Cambridge, Massachusetts.,Harvard Medical School, Boston, Massachusetts.,Center for Genomic Medicine, Massachusetts General Hospital, Boston, Massachusetts.,The Broad Institute of MIT and Harvard, Cambridge, Massachusetts
| | - Sami S Amr
- Laboratory for Molecular Medicine, Partners Healthcare Personalized Medicine, Cambridge, Massachusetts.,Harvard Medical School, Boston, Massachusetts.,Department of Pathology, Brigham & Women's Hospital, Boston, Massachusetts
| | - Ahmad N Abou Tayoun
- The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.,The University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
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Su Y, Gao X, Huang SS, Mao JN, Huang BQ, Zhao JD, Kang DY, Zhang X, Dai P. Clinical and molecular characterization of POU3F4 mutations in multiple DFNX2 Chinese families. BMC MEDICAL GENETICS 2018; 19:157. [PMID: 30176854 PMCID: PMC6122742 DOI: 10.1186/s12881-018-0630-9] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Accepted: 06/21/2018] [Indexed: 02/07/2023]
Abstract
Background Many X-linked non-syndromic hearing loss (HL) cases are caused by various mutations in the POU domain class 3 transcription factor 4 (POU3F4) gene. This study aimed to identify allelic variants of this gene in two Chinese families displaying X-linked inheritance deafness-2 (DFNX2) and one sporadic case with indefinite inheritance pattern. Methods Direct DNA sequencing of the POU3F4 gene was performed in these families and in 100 Chinese individuals with normal hearing. Results There are characteristic imaging findings in DFNX2 Chinese families with POU3F4 mutations. The temporal bone computed tomography (CT) images of patients with DFNX2 are characterized by a thickened stapes footplate, hypoplasia of the cochlear base, absence of the bony modiolus, and dilated internal acoustic meatus (IAM) as well as by abnormally wide communication between the IAM and the basal turn of the cochlea. We identified three causative mutations in POU3F4 for three probands and their extended families. In family 1468, we observed a novel deletion mutation, c.973delT, which is predicted to result in a p.Trp325Gly amino acid frameshift. In family 2741, the mutation c.927delCTC was identified, which is predicted to result in the deletion of serine at position 310. In both families, the mutations were located in the POU homeodomain and are predicted to truncate the C-terminus of the POU domain. In the third family, a novel de novo transversion mutation (c.669 T > A) was identified in a 5-year-old boy that resulted in a nonsense mutation (p.Tyr223*). The mutation created a new stop codon and is predicted to result in a truncated POU3F4 protein. Conclusions Based on characteristic radiological findings and clinical features, POU3F4 gene mutation analysis will increase the success rate of stapes operations and cochlear implantations, and improve molecular diagnosis, genetic counseling, and knowledge of the molecular epidemiology of HL among patients with DFNX2.
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Affiliation(s)
- Yu Su
- Department of Otorhinolaryngology, Head and Neck Surgery, PLA General Hospital, Beijing, 100853, People's Republic of China.,Department of Otorhinolaryngology, Hainan Branch of PLA General Hospital, Sanya, 572000, People's Republic of China
| | - Xue Gao
- Department of Otorhinolaryngology, Head and Neck Surgery, PLA General Hospital, Beijing, 100853, People's Republic of China.,Department of Otolaryngology, The General Hospital of the PLA Rocket Force, 16# Xi Wai Da Jie, Beijing, 100088, People's Republic of China
| | - Sha-Sha Huang
- Department of Otorhinolaryngology, Head and Neck Surgery, PLA General Hospital, Beijing, 100853, People's Republic of China
| | - Jing-Ning Mao
- Department of Medical Imaging, PLA 307 Hospital, Beijing, 100074, People's Republic of China
| | - Bang-Qing Huang
- Department of Otorhinolaryngology, Hainan Branch of PLA General Hospital, Sanya, 572000, People's Republic of China
| | - Jian-Dong Zhao
- Department of Otorhinolaryngology, Head and Neck Surgery, PLA General Hospital, Beijing, 100853, People's Republic of China
| | - Dong-Yang Kang
- Department of Otorhinolaryngology, Head and Neck Surgery, PLA General Hospital, Beijing, 100853, People's Republic of China
| | - Xin Zhang
- Department of Otorhinolaryngology, Head and Neck Surgery, PLA General Hospital, Beijing, 100853, People's Republic of China
| | - Pu Dai
- Department of Otorhinolaryngology, Head and Neck Surgery, PLA General Hospital, Beijing, 100853, People's Republic of China.
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10
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Barashkov NA, Klarov LA, Teryutin FM, Solovyev AV, Pshennikova VG, Konnikova EE, Romanov GP, Tobokhov AV, Morozov IV, Bondar AA, Posukh OL, Dzhemileva LU, Tomsky MI, Khusnutdinova EK, Fedorova SA. A novel pathogenic variant c.975G>A (p.Trp325*) in the POU3F4 gene in Yakut family (Eastern Siberia, Russia) with the X-linked deafness-2 (DFNX2). Int J Pediatr Otorhinolaryngol 2018; 104:94-97. [PMID: 29287890 DOI: 10.1016/j.ijporl.2017.11.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/12/2017] [Revised: 11/01/2017] [Accepted: 11/01/2017] [Indexed: 10/18/2022]
Abstract
Here, we report a novel hemizygous transition c.975G>A (p.Trp325*) in POU3F4 gene (Xq21) found in two deaf half-brothers from one Yakut family (Eastern Siberia, Russia) with identical inner ear abnormalities ("corkscrew" cochlea with an absence of modiolus) specific to X-linked deafness-2 (DFNX2). Comprehensive clinical evaluation (CT and MR-imaging, audiological and stabilometric examinations) of available members of this family revealed both already known (mixed progressive hearing loss) and additional (enlargement of semicircular canals and postural disorders) clinical DFNX2 features in affected males with c.975G>A (p.Trp325*). Moreover, mild enlargement of semicircular canals, postural abnormalities and different types of hearing thresholds were found in female carrier of this POU3F4-variant.
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Affiliation(s)
- Nikolay A Barashkov
- Department of Molecular Genetics, Yakut Science Centre of Complex Medical Problems, Yakutsk, Russian Federation; Laboratory of Molecular Biology, Institute of Natural Sciences, M.K. Ammosov North-Eastern Federal University, Yakutsk, Russian Federation.
| | - Leonid A Klarov
- Department of Molecular Genetics, Yakut Science Centre of Complex Medical Problems, Yakutsk, Russian Federation; Department of Radiology, Republican Hospital #1- National Medical Centre, Ministry of Public Health of the Sakha Republic, Yakutsk, Russian Federation; Institute of Medicine, M.K. Ammosov North-Eastern Federal University, Yakutsk, Russian Federation
| | - Fedor M Teryutin
- Department of Molecular Genetics, Yakut Science Centre of Complex Medical Problems, Yakutsk, Russian Federation; Laboratory of Molecular Biology, Institute of Natural Sciences, M.K. Ammosov North-Eastern Federal University, Yakutsk, Russian Federation
| | - Aisen V Solovyev
- Department of Molecular Genetics, Yakut Science Centre of Complex Medical Problems, Yakutsk, Russian Federation; Laboratory of Molecular Biology, Institute of Natural Sciences, M.K. Ammosov North-Eastern Federal University, Yakutsk, Russian Federation
| | - Vera G Pshennikova
- Department of Molecular Genetics, Yakut Science Centre of Complex Medical Problems, Yakutsk, Russian Federation; Laboratory of Molecular Biology, Institute of Natural Sciences, M.K. Ammosov North-Eastern Federal University, Yakutsk, Russian Federation
| | - Edilia E Konnikova
- Institute of Medicine, M.K. Ammosov North-Eastern Federal University, Yakutsk, Russian Federation
| | - Georgii P Romanov
- Department of Molecular Genetics, Yakut Science Centre of Complex Medical Problems, Yakutsk, Russian Federation; Laboratory of Molecular Biology, Institute of Natural Sciences, M.K. Ammosov North-Eastern Federal University, Yakutsk, Russian Federation
| | - Alexander V Tobokhov
- Institute of Medicine, M.K. Ammosov North-Eastern Federal University, Yakutsk, Russian Federation
| | - Igor V Morozov
- SB RAS Genomics Core Facility, Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation; Novosibirsk State University, Novosibirsk, Russian Federation
| | - Alexander A Bondar
- SB RAS Genomics Core Facility, Institute of Chemical Biology and Fundamental Medicine, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation
| | - Olga L Posukh
- Novosibirsk State University, Novosibirsk, Russian Federation; Federal Research Center Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation
| | - Lilya U Dzhemileva
- Laboratory of Human Molecular Genetics, Institute of Biochemistry and Genetics, Ufa Scientific Centre, Russian Academy of Sciences, Ufa, Russian Federation; Department of Immunology and Human Reproductive Health, Bashkir State Medical University, Ufa, Russian Federation
| | - Mikhail I Tomsky
- Department of Molecular Genetics, Yakut Science Centre of Complex Medical Problems, Yakutsk, Russian Federation
| | - Elza K Khusnutdinova
- Laboratory of Human Molecular Genetics, Institute of Biochemistry and Genetics, Ufa Scientific Centre, Russian Academy of Sciences, Ufa, Russian Federation; Department of Genetics and Fundamental Medicine, Bashkir State University, Ufa, Russian Federation
| | - Sardana A Fedorova
- Department of Molecular Genetics, Yakut Science Centre of Complex Medical Problems, Yakutsk, Russian Federation; Laboratory of Molecular Biology, Institute of Natural Sciences, M.K. Ammosov North-Eastern Federal University, Yakutsk, Russian Federation
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11
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Jin ZB, Li Z, Liu Z, Jiang Y, Cai XB, Wu J. Identification of de novo germline mutations and causal genes for sporadic diseases using trio-based whole-exome/genome sequencing. Biol Rev Camb Philos Soc 2017; 93:1014-1031. [PMID: 29154454 DOI: 10.1111/brv.12383] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2017] [Revised: 09/28/2017] [Accepted: 10/10/2017] [Indexed: 12/14/2022]
Abstract
Whole-genome or whole-exome sequencing (WGS/WES) of the affected proband together with normal parents (trio) is commonly adopted to identify de novo germline mutations (DNMs) underlying sporadic cases of various genetic disorders. However, our current knowledge of the occurrence and functional effects of DNMs remains limited and accurately identifying the disease-causing DNM from a group of irrelevant DNMs is complicated. Herein, we provide a general-purpose discussion of important issues related to pathogenic gene identification based on trio-based WGS/WES data. Specifically, the relevance of DNMs to human sporadic diseases, current knowledge of DNM biogenesis mechanisms, and common strategies or software tools used for DNM detection are reviewed, followed by a discussion of pathogenic gene prioritization. In addition, several key factors that may affect DNM identification accuracy and causal gene prioritization are reviewed. Based on recent major advances, this review both sheds light on how trio-based WGS/WES technologies can play a significant role in the identification of DNMs and causal genes for sporadic diseases, and also discusses existing challenges.
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Affiliation(s)
- Zi-Bing Jin
- Division of Ophthalmic Genetics, The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, Wenzhou, 325027, China.,State Key Laboratory of Ophthalmology Optometry and Vision Science, Wenzhou Medical University, Wenzhou, 325027, China
| | - Zhongshan Li
- Institute of Genomic Medicine, Wenzhou Medical University, Wenzhou, 325000, China
| | - Zhenwei Liu
- Institute of Genomic Medicine, Wenzhou Medical University, Wenzhou, 325000, China
| | - Yi Jiang
- Institute of Genomic Medicine, Wenzhou Medical University, Wenzhou, 325000, China
| | - Xue-Bi Cai
- Division of Ophthalmic Genetics, The Eye Hospital, School of Ophthalmology & Optometry, Wenzhou Medical University, Wenzhou, 325027, China.,State Key Laboratory of Ophthalmology Optometry and Vision Science, Wenzhou Medical University, Wenzhou, 325027, China
| | - Jinyu Wu
- Institute of Genomic Medicine, Wenzhou Medical University, Wenzhou, 325000, China
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12
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Yang A, Kim J, Ki CS, Hong SH, Cho SY, Jin DK. HDR syndrome with a novel mutation in GATA3 mimicking a congenital X-linked stapes gusher: a case report. BMC MEDICAL GENETICS 2017; 18:121. [PMID: 29073906 PMCID: PMC5659003 DOI: 10.1186/s12881-017-0484-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Accepted: 10/18/2017] [Indexed: 11/25/2022]
Abstract
Background Hypoparathyroidism, sensorineural hearing loss, and renal disease (HDR) syndrome, also known as Barakat syndrome, is a rare genetic disorder with high phenotypic heterogeneity caused by haploinsufficiency of the GATA3 gene on chromosome 10p14-p15. For these reasons, the diagnosis of HDR syndrome is challenging and requires a high index of suspicion as well as genetic analysis. Case presentation A 14-month-old boy, with sensorineural hearing loss in both ears, showed typical radiological features of X-linked stapes gusher on preoperative temporal bone computed tomography (CT) for cochlear implantations. Then after his discharge from hospital, he suffered a hypocalcemic seizure and we discovered a renal cyst during investigation of hypocalcemia. He was finally diagnosed with HDR syndrome by clinical findings, which were confirmed by molecular genetic testing. Direct sequencing of the GATA3 gene showed a heterozygous 2-bp deletion (c.1201_1202delAT), which is predicted to cause a frameshift of the reading frame (p.Met401Valfs*106). Conclusions To our knowledge, this is the first case of HDR syndrome with a novel de novo variant mimicking a congenital X-linked stapes gusher syndrome. Novel mutations and the diversity of clinical manifestations expand the genotypic and phenotypic spectrum of HDR syndrome. Diagnosis of HDR syndrome is still challenging, but clinicians should consider it in their differential diagnosis for children with a wide range of clinical manifestations including hypocalcemia induced seizures and deafness. We hope that this case will contribute to further understanding and studies of HDR-associated GATA3 mutations. Electronic supplementary material The online version of this article (10.1186/s12881-017-0484-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Aram Yang
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Korea
| | - Jinsup Kim
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Korea
| | - Chang-Seok Ki
- Department of Laboratory Medicine and Genetics, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sung Hwa Hong
- Department of Otorhinolaryngology-Head and Neck Surgery, Samsung Changwon Hospital, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Sung Yoon Cho
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Korea.
| | - Dong-Kyu Jin
- Department of Pediatrics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, Korea
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13
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Pollak A, Lechowicz U, Kędra A, Stawiński P, Rydzanicz M, Furmanek M, Brzozowska M, Mrówka M, Skarżyński H, Skarżyński PH, Ołdak M, Płoski R. Novel and De Novo Mutations Extend Association of POU3F4 with Distinct Clinical and Radiological Phenotype of Hearing Loss. PLoS One 2016; 11:e0166618. [PMID: 27941975 PMCID: PMC5152817 DOI: 10.1371/journal.pone.0166618] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Accepted: 11/01/2016] [Indexed: 12/18/2022] Open
Abstract
POU3F4 mutations (DFNX2) are the most prevalent among non-syndromic X-linked hearing loss (HL) identified to date. Clinical manifestations of DFNX2 usually comprise congenital HL either sensorineural or mixed, a tendency towards perilymphatic gusher during otologic surgery and temporal bone malformations. The aim of the present study was to screen for POU3F4 mutations in a group of 30 subjects with a suggestive clinical phenotype as well as a group (N = 1671–2018) of unselected hearing loss patients. We also planned to analyze audiological and radiological features in patients with HL caused by POU3F4 defects. The molecular techniques used to detect POU3F4 mutations included whole exome sequencing (WES), Sanger sequencing and real-time polymerase chain reaction. Hearing status was assessed with pure-tone audiometry and auditory brainstem response. Computer tomography scans were evaluated to define the pattern of structural changes in the temporal bones. Six novel (p.Gln27*, p.Glu187*, p.Leu217*, p.Gln275*, p.Gln306*, p.Val324Asp) and two known (p.Ala116fs141*, p.Leu208*) POU3F4 mutations were detected in the studied cohort. All probands with POU3F4 defects suffered from bilateral, prelingual, severe to profound HL. Morphological changes of the temporal bone in these patients presented a similar pattern, including malformations of the internal auditory canal, vestibular aqueduct, modiolus and vestibule. Despite different localization in the POU3F4 gene all mutations severely impair the protein structure affecting at least one functional POU3F4 domain, and results in similar and severe clinical manifestations. Sequencing of the entire POU3F4 gene is recommended in patients with characteristic temporal bone malformations. Results of POU3F4 mutation testing are important not only for a proper genetic counseling, but also for adequate preparation and conduction of a surgical procedure.
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Affiliation(s)
- Agnieszka Pollak
- Department of Genetics, Institute of Physiology and Pathology of Hearing, Warsaw, Poland
| | - Urszula Lechowicz
- Department of Genetics, Institute of Physiology and Pathology of Hearing, Warsaw, Poland
| | - Anna Kędra
- Department of Medical Genetics, Warsaw Medical University, Warsaw, Poland
- Postgraduate School of Molecular Medicine, Warsaw Medical University, Warsaw, Poland
| | - Piotr Stawiński
- Department of Genetics, Institute of Physiology and Pathology of Hearing, Warsaw, Poland
| | | | - Mariusz Furmanek
- Bioimaging Research Center, World Hearing Centre, Institute of Physiology and Pathology of Hearing, Warsaw/Kajetany, Poland
- Department of Radiology and Diagnostic Imaging, Medical Centre for Postgraduate Education, Warsaw, Poland
| | | | - Maciej Mrówka
- Oto-Rhino-Laryngology Surgery Clinic, Institute of Physiology and Pathology of Hearing, Warsaw/Kajetany, Poland
| | - Henryk Skarżyński
- Oto-Rhino-Laryngology Surgery Clinic, Institute of Physiology and Pathology of Hearing, Warsaw/Kajetany, Poland
| | - Piotr H. Skarżyński
- Oto-Rhino-Laryngology Surgery Clinic, Institute of Physiology and Pathology of Hearing, Warsaw/Kajetany, Poland
- Department of Heart Failure and Cardiac Rehabilitation, Medical University of Warsaw, Warsaw, Poland
- Institute of Sensory Organs, Kajetany, Poland
| | - Monika Ołdak
- Department of Genetics, Institute of Physiology and Pathology of Hearing, Warsaw, Poland
- * E-mail: (RP); (MO)
| | - Rafał Płoski
- Department of Medical Genetics, Warsaw Medical University, Warsaw, Poland
- * E-mail: (RP); (MO)
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14
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Abstract
PURPOSE OF REVIEW In the age of targeted genomic enrichment and massively parallel sequencing, there is no more efficient genetic testing method for the diagnosis of hereditary hearing loss. More clinical tests are on the market, which can make choosing good tests difficult. RECENT FINDINGS More and larger comprehensive genetic studies in patients with hearing loss have been published recently. They remind us of the importance of looking for both single nucleotide variation and copy number variation in all genes implicated in nonsyndromic hearing loss. They also inform us of how a patient's history and phenotype provide essential information in the interpretation of genetic data. SUMMARY Choosing the most comprehensive genetic test improves the chances of a genetic diagnosis and thereby impacts clinical care.
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15
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Wester JL, Merna C, Peng KA, Lewis R, Sepahdari AR, Ishiyama G, Hosokawa K, Kumakawa K, Ishiyama A. Facial nerve stimulation following cochlear implantation for X-linked stapes gusher syndrome leading to identification of a novel POU3F4 mutation. Int J Pediatr Otorhinolaryngol 2016; 91:121-123. [PMID: 27863625 DOI: 10.1016/j.ijporl.2016.10.003] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/16/2016] [Revised: 10/03/2016] [Accepted: 10/04/2016] [Indexed: 11/17/2022]
Abstract
We report a case of a nine-year-old male who presented with facial nerve stimulation four years after cochlear implantation. Computed tomography was performed revealing a dilated internal auditory meatus and the cochlear implant electrode was found to be protruding into the fallopian canal at the level of the geniculate ganglion. Subsequent genetic analysis demonstrated X-linked deafness type 2 (DFNX2) caused by a novel c.769C > T nucleotide change in the POU domain, class 3, transcription factor 4 gene (POU3F4). Inactivation of electrodes 1 and 19-21 successfully abated facial nerve stimulation.
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Affiliation(s)
- Jacob L Wester
- Department of Head and Neck Surgery, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Catherine Merna
- Department of Head and Neck Surgery, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Kevin A Peng
- Department of Head and Neck Surgery, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Rebecca Lewis
- Department of Audiology and Speech Pathology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Ali R Sepahdari
- Department of Radiological Sciences, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Gail Ishiyama
- Department of Neurology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA
| | - Kumiko Hosokawa
- Department of Otolaryngology, Hamamatsu University School of Medicine, Hamamatsu, Shizuoka, Japan
| | - Kozo Kumakawa
- Department of Otolaryngology, Toranomon Hospital, Minato-ku, Tokyo, Japan
| | - Akira Ishiyama
- Department of Head and Neck Surgery, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, CA, USA.
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16
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Jiang Y, Li Z, Liu Z, Chen D, Wu W, Du Y, Ji L, Jin ZB, Li W, Wu J. mirDNMR: a gene-centered database of background de novo mutation rates in human. Nucleic Acids Res 2016; 45:D796-D803. [PMID: 27799474 PMCID: PMC5210538 DOI: 10.1093/nar/gkw1044] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 09/29/2016] [Accepted: 10/22/2016] [Indexed: 01/24/2023] Open
Abstract
De novo germline mutations (DNMs) are the rarest genetic variants proven to cause a considerable number of sporadic genetic diseases, such as autism spectrum disorders, epileptic encephalopathy, schizophrenia, congenital heart disease, type 1 diabetes, and hearing loss. However, it is difficult to accurately assess the cause of DNMs and identify disease-causing genes from the considerable number of DNMs in probands. A common method to this problem is to identify genes that harbor significantly more DNMs than expected by chance, with accurate background DNM rate (DNMR) required. Therefore, in this study, we developed a novel database named mirDNMR for the collection of gene-centered background DNMRs obtained from different methods and population variation data. The database has the following functions: (i) browse and search the background DNMRs of each gene predicted by four different methods, including GC content (DNMR-GC), sequence context (DNMR-SC), multiple factors (DNMR-MF) and local DNA methylation level (DNMR-DM); (ii) search variant frequencies in publicly available databases, including ExAC, ESP6500, UK10K, 1000G and dbSNP and (iii) investigate the DNM burden to prioritize candidate genes based on the four background DNMRs using three statistical methods (TADA, Binomial and Poisson test). As a case study, we successfully employed our database in candidate gene prioritization for a sporadic complex disease: intellectual disability. In conclusion, mirDNMR (https://www.wzgenomics.cn/mirdnmr/) can be widely used to identify the genetic basis of sporadic genetic diseases.
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Affiliation(s)
- Yi Jiang
- Institute of Genomic Medicine, Wenzhou Medical University, Wenzhou 325000, China
| | - Zhongshan Li
- Institute of Genomic Medicine, Wenzhou Medical University, Wenzhou 325000, China
| | - Zhenwei Liu
- Institute of Genomic Medicine, Wenzhou Medical University, Wenzhou 325000, China
| | - Denghui Chen
- Zhejiang Provincial Key Laboratory of Medical Genetics, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325000, China
| | - Wanying Wu
- Beijing Institutes of Life Science, Chinese Academy of Science, Beijing 100101, China
| | - Yaoqiang Du
- Zhejiang Provincial Key Laboratory of Medical Genetics, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325000, China
| | - Liying Ji
- Institute of Genomic Medicine, Wenzhou Medical University, Wenzhou 325000, China
| | - Zi-Bing Jin
- The Eye Hospital of Wenzhou Medical University, The State Key Laboratory Cultivation Base and Key Laboratory of Vision Science, Ministry of Health, Wenzhou 325000, China
| | - Wei Li
- Zhejiang Provincial Key Laboratory of Medical Genetics, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou 325000, China
| | - Jinyu Wu
- Institute of Genomic Medicine, Wenzhou Medical University, Wenzhou 325000, China
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Kanno A, Mutai H, Namba K, Morita N, Nakano A, Ogahara N, Sugiuchi T, Ogawa K, Matsunaga T. Frequency and specific characteristics of the incomplete partition type III anomaly in children. Laryngoscope 2016; 127:1663-1669. [DOI: 10.1002/lary.26245] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2016] [Revised: 07/11/2016] [Accepted: 07/14/2016] [Indexed: 11/05/2022]
Affiliation(s)
- Ayako Kanno
- Division of Hearing and Balance Research; National Institute of Sensory Organs; National Hospital Organization Tokyo Medical Center; Tokyo Japan
- Department of Otolaryngology; Inagi Municipal Hospital; Tokyo Japan
- Department of Otolaryngology; Keio University School of Medicine; Tokyo Japan
| | - Hideki Mutai
- Division of Hearing and Balance Research; National Institute of Sensory Organs; National Hospital Organization Tokyo Medical Center; Tokyo Japan
| | - Kazunori Namba
- Division of Hearing and Balance Research; National Institute of Sensory Organs; National Hospital Organization Tokyo Medical Center; Tokyo Japan
| | - Noriko Morita
- Department of Otolaryngology; Kobari General Hospital; Chiba Japan
| | - Atsuko Nakano
- Division of Otolaryngology; Chiba Children's Hospital; Chiba Japan
| | - Noboru Ogahara
- Department of Otorhinolaryngology; Kanagawa Children's Medical Center; Kanagawa Japan
| | - Tomoko Sugiuchi
- Department of Otolaryngology; Kanto Rosai Hospital; Kanagawa Japan
| | - Kaoru Ogawa
- Department of Otolaryngology; Keio University School of Medicine; Tokyo Japan
| | - Tatsuo Matsunaga
- Division of Hearing and Balance Research; National Institute of Sensory Organs; National Hospital Organization Tokyo Medical Center; Tokyo Japan
- Medical Genetics Center; National Hospital Organization Tokyo Medical Center; Tokyo Japan
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18
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Miyagawa M, Nishio SY, Usami SI. A Comprehensive Study on the Etiology of Patients Receiving Cochlear Implantation With Special Emphasis on Genetic Epidemiology. Otol Neurotol 2016; 37:e126-34. [PMID: 26756145 PMCID: PMC4710159 DOI: 10.1097/mao.0000000000000936] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Objective: Cochlear implantation is the most important treatment currently available for profound sensorineural hearing loss. The aim of this study was to investigate the etiology of hearing loss in patients with cochlear implantation, and to compare outcomes. Methods: Japanese hearing loss patients who received cochlear implants (CIs) or electric acoustic stimulation (EAS) in Shinshu University hospital (n = 173, prelingual onset: 92, postlingual onset: 81) participated in this study. Invader assay followed by the targeted exon-sequencing of 63 deafness genes using Massively parallel DNA sequencing (MPS) was applied. For prelingual patients, additional imaging examination, cCMV screening, and pediatric examination were performed for precise diagnosis. Results: Genetic screening successfully identified the causative mutation in 60% of patients with prelingual onset hearing loss and in 36% of those with postlingual hearing loss. Differences in the kinds of genes identified were observed between the two groups. Although there were marked variations in the outcome of cochlear implantation, patients with specific deafness gene mutations showed relatively good results. Conclusion: The present study showed genetic etiology is a major cause of hearing loss in CI/EAS patients. Patients possessing mutations in a number of deafness genes known to be expressed within inner ear have achieved satisfactory auditory performance, suggesting that the identification of the genetic background facilitates the prediction of post-CI performance. MPS is a powerful tool for the identification of causative deafness genes in patients receiving cochlear implantation. Therefore, determination of the involved region inside/outside of the cochlea by identification of the responsible gene is essential.
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Affiliation(s)
- Maiko Miyagawa
- *Department of Otorhinolaryngology †Department of Hearing Implant Sciences, Shinshu University School of Medicine, Matsumoto, Japan
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