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Aldè M, Cantarella G, Zanetti D, Pignataro L, La Mantia I, Maiolino L, Ferlito S, Di Mauro P, Cocuzza S, Lechien JR, Iannella G, Simon F, Maniaci A. Autosomal Dominant Non-Syndromic Hearing Loss (DFNA): A Comprehensive Narrative Review. Biomedicines 2023; 11:1616. [PMID: 37371710 DOI: 10.3390/biomedicines11061616] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Revised: 05/26/2023] [Accepted: 05/29/2023] [Indexed: 06/29/2023] Open
Abstract
Autosomal dominant non-syndromic hearing loss (HL) typically occurs when only one dominant allele within the disease gene is sufficient to express the phenotype. Therefore, most patients diagnosed with autosomal dominant non-syndromic HL have a hearing-impaired parent, although de novo mutations should be considered in all cases of negative family history. To date, more than 50 genes and 80 loci have been identified for autosomal dominant non-syndromic HL. DFNA22 (MYO6 gene), DFNA8/12 (TECTA gene), DFNA20/26 (ACTG1 gene), DFNA6/14/38 (WFS1 gene), DFNA15 (POU4F3 gene), DFNA2A (KCNQ4 gene), and DFNA10 (EYA4 gene) are some of the most common forms of autosomal dominant non-syndromic HL. The characteristics of autosomal dominant non-syndromic HL are heterogenous. However, in most cases, HL tends to be bilateral, post-lingual in onset (childhood to early adulthood), high-frequency (sloping audiometric configuration), progressive, and variable in severity (mild to profound degree). DFNA1 (DIAPH1 gene) and DFNA6/14/38 (WFS1 gene) are the most common forms of autosomal dominant non-syndromic HL affecting low frequencies, while DFNA16 (unknown gene) is characterized by fluctuating HL. A long audiological follow-up is of paramount importance to identify hearing threshold deteriorations early and ensure prompt treatment with hearing aids or cochlear implants.
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Affiliation(s)
- Mirko Aldè
- Department of Clinical Sciences and Community Health, University of Milan, 20090 Milan, Italy
- Department of Specialist Surgical Sciences, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, 20090 Milan, Italy
- Otology Study Group of the Young-Otolaryngologists of the International Federations of Oto-Rhino-Laryngological Societies (YO-IFOS), 75000 Paris, France
| | - Giovanna Cantarella
- Department of Clinical Sciences and Community Health, University of Milan, 20090 Milan, Italy
- Department of Specialist Surgical Sciences, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, 20090 Milan, Italy
| | - Diego Zanetti
- Department of Clinical Sciences and Community Health, University of Milan, 20090 Milan, Italy
- Department of Specialist Surgical Sciences, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, 20090 Milan, Italy
| | - Lorenzo Pignataro
- Department of Clinical Sciences and Community Health, University of Milan, 20090 Milan, Italy
- Department of Specialist Surgical Sciences, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, 20090 Milan, Italy
| | - Ignazio La Mantia
- Department of Medical, Surgical Sciences and Advanced Technologies G.F. Ingrassia, University of Catania, 95123 Catania, Italy
| | - Luigi Maiolino
- Department of Medical, Surgical Sciences and Advanced Technologies G.F. Ingrassia, University of Catania, 95123 Catania, Italy
| | - Salvatore Ferlito
- Department of Medical, Surgical Sciences and Advanced Technologies G.F. Ingrassia, University of Catania, 95123 Catania, Italy
| | - Paola Di Mauro
- Department of Medical, Surgical Sciences and Advanced Technologies G.F. Ingrassia, University of Catania, 95123 Catania, Italy
| | - Salvatore Cocuzza
- Department of Medical, Surgical Sciences and Advanced Technologies G.F. Ingrassia, University of Catania, 95123 Catania, Italy
| | - Jérôme René Lechien
- Otology Study Group of the Young-Otolaryngologists of the International Federations of Oto-Rhino-Laryngological Societies (YO-IFOS), 75000 Paris, France
| | - Giannicola Iannella
- Otology Study Group of the Young-Otolaryngologists of the International Federations of Oto-Rhino-Laryngological Societies (YO-IFOS), 75000 Paris, France
| | - Francois Simon
- Otology Study Group of the Young-Otolaryngologists of the International Federations of Oto-Rhino-Laryngological Societies (YO-IFOS), 75000 Paris, France
| | - Antonino Maniaci
- Otology Study Group of the Young-Otolaryngologists of the International Federations of Oto-Rhino-Laryngological Societies (YO-IFOS), 75000 Paris, France
- Department of Medical, Surgical Sciences and Advanced Technologies G.F. Ingrassia, University of Catania, 95123 Catania, Italy
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Singh S, Penney C, Griffin A, Woodland G, Werdyani S, Benteau TA, Abdelfatah N, Squires J, King B, Houston J, Dyer MJ, Roslin NM, Vincent D, Marquis P, O'Rielly DD, Hodgkinson K, Burt T, Baker A, Stanton SG, Young TL. Highly variable hearing loss due to POU4F3 (c.37del) is revealed by longitudinal, frequency specific analyses. Eur J Hum Genet 2023:10.1038/s41431-023-01358-0. [PMID: 37072551 DOI: 10.1038/s41431-023-01358-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Revised: 03/21/2023] [Accepted: 03/28/2023] [Indexed: 04/20/2023] Open
Abstract
Genotype-phenotype correlations add value to the management of families with hereditary hearing loss (HL), where age-related typical audiograms (ARTAs) are generated from cross-sectional regression equations and used to predict the audiogram phenotype across the lifespan. A seven-generation kindred with autosomal dominant sensorineural HL (ADSNHL) was recruited and a novel pathogenic variant in POU4F3 (c.37del) was identified by combining linkage analysis with whole exome sequencing (WES). POU4F3 is noted for large intrafamilial variation including the age of onset of HL, audiogram configuration and presence of vestibular impairment. Sequential audiograms and longitudinal analyses reveal highly variable audiogram features among POU4F3 (c.37del) carriers, limiting the utility of ARTAs for clinical prognosis and management of HL. Furthermore, a comparison of ARTAs against three previously published families (1 Israeli Jewish, 2 Dutch) reveals significant interfamilial differences, with earlier onset and slower deterioration. This is the first published report of a North American family with ADSNHL due to POU4F3, the first report of the pathogenic c.37del variant, and the first study to conduct longitudinal analysis, extending the phenotypic spectrum of DFNA15.
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Affiliation(s)
- Sushma Singh
- Communication Sciences and Disorders and National Centre for Audiology, Western University, Elborn College, 1201 Western Road, London, ON, Canada
| | - Cindy Penney
- Centre for Translational Genomics, Health Sciences Centre, 300 Prince Philip Drive, St. John's, NL, Canada
- Faculty of Medicine, Health Sciences Centre, Memorial University, 300 Prince Philip Drive, St. John's, NL, Canada
| | - Anne Griffin
- Faculty of Medicine, Health Sciences Centre, Memorial University, 300 Prince Philip Drive, St. John's, NL, Canada
| | - Geoffrey Woodland
- Centre for Translational Genomics, Health Sciences Centre, 300 Prince Philip Drive, St. John's, NL, Canada
| | - Salem Werdyani
- Faculty of Medicine, Health Sciences Centre, Memorial University, 300 Prince Philip Drive, St. John's, NL, Canada
| | - Tammy A Benteau
- Faculty of Medicine, Health Sciences Centre, Memorial University, 300 Prince Philip Drive, St. John's, NL, Canada
| | - Nelly Abdelfatah
- Faculty of Medicine, Health Sciences Centre, Memorial University, 300 Prince Philip Drive, St. John's, NL, Canada
| | - Jessica Squires
- Faculty of Medicine, Health Sciences Centre, Memorial University, 300 Prince Philip Drive, St. John's, NL, Canada
| | | | - Jim Houston
- Faculty of Medicine, Health Sciences Centre, Memorial University, 300 Prince Philip Drive, St. John's, NL, Canada
| | - Matthew J Dyer
- Faculty of Medicine, Health Sciences Centre, Memorial University, 300 Prince Philip Drive, St. John's, NL, Canada
| | - Nicole M Roslin
- The Centre for Applied Genomics, The Hospital for Sick Children, Peter Gilgan Centre for Research and Learning, 686 Bay Street, Toronto, ON, Canada
| | - Daniel Vincent
- Canadian Centre for Computational Genomics, McGill University, 740 Dr. Penfield Avenue, Montréal, QC, Canada
| | - Pascale Marquis
- Canadian Centre for Computational Genomics, McGill University, 740 Dr. Penfield Avenue, Montréal, QC, Canada
| | - Darren D O'Rielly
- Centre for Translational Genomics, Health Sciences Centre, 300 Prince Philip Drive, St. John's, NL, Canada
| | - Kathy Hodgkinson
- Faculty of Medicine, Health Sciences Centre, Memorial University, 300 Prince Philip Drive, St. John's, NL, Canada
| | - Taylor Burt
- Faculty of Medicine, Health Sciences Centre, Memorial University, 300 Prince Philip Drive, St. John's, NL, Canada
| | - Ashley Baker
- Faculty of Medicine, Health Sciences Centre, Memorial University, 300 Prince Philip Drive, St. John's, NL, Canada
| | - Susan G Stanton
- Communication Sciences and Disorders and National Centre for Audiology, Western University, Elborn College, 1201 Western Road, London, ON, Canada
| | - Terry-Lynn Young
- Communication Sciences and Disorders and National Centre for Audiology, Western University, Elborn College, 1201 Western Road, London, ON, Canada.
- Centre for Translational Genomics, Health Sciences Centre, 300 Prince Philip Drive, St. John's, NL, Canada.
- Faculty of Medicine, Health Sciences Centre, Memorial University, 300 Prince Philip Drive, St. John's, NL, Canada.
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Knockdown and mutation of Pou4f3 gene mutation promotes pyroptosis of cochleae in cisplatin-induced deafness mice by NLRP3/caspase-3/GSDME pathway. Toxicology 2022; 482:153368. [DOI: 10.1016/j.tox.2022.153368] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Revised: 10/25/2022] [Accepted: 10/26/2022] [Indexed: 11/06/2022]
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Wu HL, Yang ZR, Yan LJ, Su YD, Ma R, Li Y. NPM2 in malignant peritoneal mesothelioma: from basic tumor biology to clinical medicine. World J Surg Oncol 2022; 20:141. [PMID: 35490253 PMCID: PMC9055711 DOI: 10.1186/s12957-022-02604-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Accepted: 04/14/2022] [Indexed: 12/30/2022] Open
Abstract
BACKGROUND This review systematically summarizes gene biology features and protein structure of nucleoplasmin2 (NPM2) and the relationship between NPM2 and malignant peritoneal mesothelioma (MPM), in order to explore the molecular pathological mechanism of MPM and explore new therapeutic targets. METHODS NCBI PubMed database was used for the literature search. NCBI Gene and Protein databases, Ensembl Genome Browser, UniProt, and RCSB PDB database were used for gene and protein review. Three online tools (Consurf, DoGSiteScorer, and ZdockServer), the GEPIA database, and the Cancer Genome Atlas were used to analyze bioinformatics characteristics for NPM2 protein. RESULTS The main structural domains of NPM2 protein include the N-terminal core region, acidic region, and motif and disordered region. The N-terminal core region, involved in histone binding, is the most conserved domain in the nucleoplasmin (NPM) family. NPM2 with a large acidic tract in its C-terminal tail (NPM2-A2) is able to bind histones and form large complexes. Bioinformatics results indicated that NPM2 expression was correlated with the pathology of multiple tumors. Among mesothelioma patients, 5-year survival of patients with low-NPM2-expression was significantly higher than that of the high-NPM2-expression patients. NPM2 can facilitate the formation of histone deacetylation. NPM2 may promote histone deacetylation and inhibit the related-gene transcription, thus leading to abnormal proliferation, invasion, and metastasis of MPM. CONCLUSION NPM2 may play a key role in the development and progression of MPM.
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Affiliation(s)
- He-Liang Wu
- Department of Peritoneal Cancer Surgery, Beijing Shijitan Hospital, Peking University Ninth School of Clinical Medicine, No. 10 Tieyi Road, Yangfangdian Street, Haidian District, Beijing, 100038, China
| | - Zhi-Ran Yang
- Department of Peritoneal Cancer Surgery, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Li-Jun Yan
- Department of Peritoneal Cancer Surgery, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Yan-Dong Su
- Department of Peritoneal Cancer Surgery, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Ru Ma
- Department of Peritoneal Cancer Surgery, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Yan Li
- Department of Peritoneal Cancer Surgery, Beijing Shijitan Hospital, Peking University Ninth School of Clinical Medicine, No. 10 Tieyi Road, Yangfangdian Street, Haidian District, Beijing, 100038, China. .,Department of Peritoneal Cancer Surgery, Beijing Shijitan Hospital, Capital Medical University, Beijing, China.
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Pillay NS, Ross OA, Christoffels A, Bardien S. Current Status of Next-Generation Sequencing Approaches for Candidate Gene Discovery in Familial Parkinson´s Disease. Front Genet 2022; 13:781816. [PMID: 35299952 PMCID: PMC8921601 DOI: 10.3389/fgene.2022.781816] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 01/12/2022] [Indexed: 11/13/2022] Open
Abstract
Parkinson’s disease is a neurodegenerative disorder with a heterogeneous genetic etiology. The advent of next-generation sequencing (NGS) technologies has aided novel gene discovery in several complex diseases, including PD. This Perspective article aimed to explore the use of NGS approaches to identify novel loci in familial PD, and to consider their current relevance. A total of 17 studies, spanning various populations (including Asian, Middle Eastern and European ancestry), were identified. All the studies used whole-exome sequencing (WES), with only one study incorporating both WES and whole-genome sequencing. It is worth noting how additional genetic analyses (including linkage analysis, haplotyping and homozygosity mapping) were incorporated to enhance the efficacy of some studies. Also, the use of consanguineous families and the specific search for de novo mutations appeared to facilitate the finding of causal mutations. Across the studies, similarities and differences in downstream analysis methods and the types of bioinformatic tools used, were observed. Although these studies serve as a practical guide for novel gene discovery in familial PD, these approaches have not significantly resolved the “missing heritability” of PD. We speculate that what is needed is the use of third-generation sequencing technologies to identify complex genomic rearrangements and new sequence variation, missed with existing methods. Additionally, the study of ancestrally diverse populations (in particular those of Black African ancestry), with the concomitant optimization and tailoring of sequencing and analytic workflows to these populations, are critical. Only then, will this pave the way for exciting new discoveries in the field.
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Affiliation(s)
- Nikita Simone Pillay
- South African National Bioinformatics Institute (SANBI), South African Medical Research Council Bioinformatics Unit, University of the Western Cape, Bellville, South Africa
| | - Owen A. Ross
- Department of Neuroscience, Mayo Clinic, Jacksonville, FL, United States
- Department of Clinical Genomics, Mayo Clinic, Jacksonville, FL, United States
| | - Alan Christoffels
- South African National Bioinformatics Institute (SANBI), South African Medical Research Council Bioinformatics Unit, University of the Western Cape, Bellville, South Africa
- Africa Centres for Disease Control and Prevention, African Union Headquarters, Addis Ababa, Ethiopia
| | - Soraya Bardien
- Division of Molecular Biology and Human Genetics, Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, Stellenbosch University, Cape Town, South Africa
- South African Medical Research Council/Stellenbosch University Genomics of Brain Disorders Research Unit, Cape Town, South Africa
- *Correspondence: Soraya Bardien,
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Van Heurck R, Carminho-Rodrigues MT, Ranza E, Stafuzza C, Quteineh L, Gehrig C, Hammar E, Guipponi M, Abramowicz M, Senn P, Guinand N, Cao-Van H, Paoloni-Giacobino A. Benefits of Exome Sequencing in Children with Suspected Isolated Hearing Loss. Genes (Basel) 2021; 12:genes12081277. [PMID: 34440452 PMCID: PMC8391342 DOI: 10.3390/genes12081277] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 08/03/2021] [Accepted: 08/18/2021] [Indexed: 12/12/2022] Open
Abstract
Purpose: Hearing loss is characterized by an extensive genetic heterogeneity and remains a common disorder in children. Molecular diagnosis is of particular benefit in children, and permits the early identification of clinically-unrecognized hearing loss syndromes, which permits effective clinical management and follow-up, including genetic counselling. Methods: We performed whole-exome sequencing with the analysis of a panel of 189 genes associated with hearing loss in a prospective cohort of 61 children and 9 adults presenting mainly with isolated hearing loss. Results: The overall diagnostic rate using exome sequencing was 47.2% (52.5% in children; 22% in adults). In children with confirmed molecular results, 17/32 (53.2%) showed autosomal recessive inheritance patterns, 14/32 (43.75%) showed an autosomal dominant condition, and one case had X-linked hearing loss. In adults, the two patients showed an autosomal dominant inheritance pattern. Among the 32 children, 17 (53.1%) had nonsyndromic hearing loss and 15 (46.7%) had syndromic hearing loss. One adult was diagnosed with syndromic hearing loss and one with nonsyndromic hearing loss. The most common causative genes were STRC (5 cases), GJB2 (3 cases), COL11A1 (3 cases), and ACTG1 (3 cases). Conclusions: Exome sequencing has a high diagnostic yield in children with hearing loss and can reveal a syndromic hearing loss form before other organs/systems become involved, allowing the surveillance of unrecognized present and/or future complications associated with these syndromes.
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Affiliation(s)
- Roxane Van Heurck
- Division of Genetic Medicine, Geneva University Hospitals, 1205 Geneva, Switzerland; (R.V.H.); (M.T.C.-R.); (E.R.); (L.Q.); (C.G.); (E.H.); (M.G.); (M.A.)
| | - Maria Teresa Carminho-Rodrigues
- Division of Genetic Medicine, Geneva University Hospitals, 1205 Geneva, Switzerland; (R.V.H.); (M.T.C.-R.); (E.R.); (L.Q.); (C.G.); (E.H.); (M.G.); (M.A.)
| | - Emmanuelle Ranza
- Division of Genetic Medicine, Geneva University Hospitals, 1205 Geneva, Switzerland; (R.V.H.); (M.T.C.-R.); (E.R.); (L.Q.); (C.G.); (E.H.); (M.G.); (M.A.)
| | - Caterina Stafuzza
- Ear-Nose-Throat/Head and Neck Surgery Division, Geneva University Hospitals, 1205 Geneva, Switzerland; (C.S.); (P.S.); (N.G.); (H.C.-V.)
| | - Lina Quteineh
- Division of Genetic Medicine, Geneva University Hospitals, 1205 Geneva, Switzerland; (R.V.H.); (M.T.C.-R.); (E.R.); (L.Q.); (C.G.); (E.H.); (M.G.); (M.A.)
| | - Corinne Gehrig
- Division of Genetic Medicine, Geneva University Hospitals, 1205 Geneva, Switzerland; (R.V.H.); (M.T.C.-R.); (E.R.); (L.Q.); (C.G.); (E.H.); (M.G.); (M.A.)
| | - Eva Hammar
- Division of Genetic Medicine, Geneva University Hospitals, 1205 Geneva, Switzerland; (R.V.H.); (M.T.C.-R.); (E.R.); (L.Q.); (C.G.); (E.H.); (M.G.); (M.A.)
| | - Michel Guipponi
- Division of Genetic Medicine, Geneva University Hospitals, 1205 Geneva, Switzerland; (R.V.H.); (M.T.C.-R.); (E.R.); (L.Q.); (C.G.); (E.H.); (M.G.); (M.A.)
| | - Marc Abramowicz
- Division of Genetic Medicine, Geneva University Hospitals, 1205 Geneva, Switzerland; (R.V.H.); (M.T.C.-R.); (E.R.); (L.Q.); (C.G.); (E.H.); (M.G.); (M.A.)
| | - Pascal Senn
- Ear-Nose-Throat/Head and Neck Surgery Division, Geneva University Hospitals, 1205 Geneva, Switzerland; (C.S.); (P.S.); (N.G.); (H.C.-V.)
| | - Nils Guinand
- Ear-Nose-Throat/Head and Neck Surgery Division, Geneva University Hospitals, 1205 Geneva, Switzerland; (C.S.); (P.S.); (N.G.); (H.C.-V.)
| | - Helene Cao-Van
- Ear-Nose-Throat/Head and Neck Surgery Division, Geneva University Hospitals, 1205 Geneva, Switzerland; (C.S.); (P.S.); (N.G.); (H.C.-V.)
| | - Ariane Paoloni-Giacobino
- Division of Genetic Medicine, Geneva University Hospitals, 1205 Geneva, Switzerland; (R.V.H.); (M.T.C.-R.); (E.R.); (L.Q.); (C.G.); (E.H.); (M.G.); (M.A.)
- Correspondence:
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Cruz Marino T, Tardif J, Leblanc J, Lavoie J, Morin P, Harvey M, Thomas MJ, Pratte A, Braverman N. First glance at the molecular etiology of hearing loss in French-Canadian families from Saguenay-Lac-Saint-Jean's founder population. Hum Genet 2021; 141:607-622. [PMID: 34387732 DOI: 10.1007/s00439-021-02332-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2021] [Accepted: 08/04/2021] [Indexed: 11/24/2022]
Abstract
The French-Canadian population of Saguenay-Lac-Saint-Jean is known for its homogenous genetic background. The hereditary causes of hearing loss were previously unexplored in this population. Individuals with hearing loss were referred from the otorhinolaryngology, pediatrics and family physicians' clinics to the medical genetics service at the Centre intégré universitaire de santé et de services sociaux du Saguenay-Lac-Saint-Jean between June 2015 and March 2021. A regional clinical evaluation strategy was developed. Samples from 63 individuals belonging to 41 families were sent independently to different molecular clinical laboratories and index cases were analyzed through comprehensive multigene panels, with a diagnostic rate of 54%. Sixteen hearing loss causal variants were identified in 12 genes, with eight of these variants not been previously reported in the literature. Recurrent variants were present in four genes, suggesting a possible founder effect, while GJB2 gene variants were scarce. A comprehensive multigene panel approach as part of the proposed clinical evaluation strategy offers a high diagnostic yield for this population.
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Affiliation(s)
- Tania Cruz Marino
- Department of Laboratory Medicine, CIUSSS Saguenay-Lac-St-Jean, Saguenay-Lac-Saint-Jean, Canada.
| | - Jessica Tardif
- Department of Laboratory Medicine, CIUSSS Saguenay-Lac-St-Jean, Saguenay-Lac-Saint-Jean, Canada
| | - Josianne Leblanc
- Department of Laboratory Medicine, CIUSSS Saguenay-Lac-St-Jean, Saguenay-Lac-Saint-Jean, Canada
| | - Janie Lavoie
- Department of Otolaryngology-Head and Neck Surgery, CIUSSS Saguenay-Lac-St-Jean, Saguenay-Lac-Saint-Jean, Canada
| | - Pascal Morin
- Department of Otolaryngology-Head and Neck Surgery, CIUSSS Saguenay-Lac-St-Jean, Saguenay-Lac-Saint-Jean, Canada
| | - Michel Harvey
- Department of Otolaryngology-Head and Neck Surgery, CIUSSS Saguenay-Lac-St-Jean, Saguenay-Lac-Saint-Jean, Canada
| | - Marie-Jacqueline Thomas
- Department of Laboratory Medicine, CIUSSS Saguenay-Lac-St-Jean, Saguenay-Lac-Saint-Jean, Canada
| | - Annabelle Pratte
- Department of Laboratory Medicine, CIUSSS Saguenay-Lac-St-Jean, Saguenay-Lac-Saint-Jean, Canada
| | - Nancy Braverman
- Division of Medical Genetics, Department of Pediatrics and Human Genetics, McGill University, Montreal, Canada
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Autophagy: A Novel Horizon for Hair Cell Protection. Neural Plast 2021; 2021:5511010. [PMID: 34306061 PMCID: PMC8263289 DOI: 10.1155/2021/5511010] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 06/21/2021] [Indexed: 12/20/2022] Open
Abstract
As a general sensory disorder, hearing loss was a major concern worldwide. Autophagy is a common cellular reaction to stress that degrades cytoplasmic waste through the lysosome pathway. Autophagy not only plays major roles in maintaining intracellular homeostasis but is also involved in the development and pathogenesis of many diseases. In the auditory system, several studies revealed the link between autophagy and hearing protection. In this review, we aimed to establish the correlation between autophagy and hair cells (HCs) from the aspects of ototoxic drugs, aging, and acoustic trauma and discussed whether autophagy could serve as a potential measure in the protection of HCs.
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A Missense POU4F3 Variant Associated with Autosomal Dominant Midfrequency Hearing Loss Alters Subnuclear Localization and Transcriptional Capabilities. BIOMED RESEARCH INTERNATIONAL 2021; 2021:5574136. [PMID: 34250087 PMCID: PMC8238589 DOI: 10.1155/2021/5574136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Accepted: 06/09/2021] [Indexed: 11/17/2022]
Abstract
Background The pathogenic variant, POU class 4 transcription factor 3 (POU4F3), is reported to cause autosomal dominant nonsyndromic hearing loss (ADNSHL). Previously, we have examined a four-generation midfrequency sensorineural hearing loss (MFSNHL) family (no. 6126) and established POU4F3 c.602T>C (p.Leu201Pro) as a potential disease-causing variant. Objectives We explored the structural and functional alterations that the c.602T>C (p.Leu201Pro) variant enforces on the POU4F3 protein. Methods We utilized wild-type (WT) and mutant (MUT) POU4F3 c.602T>C plasmid incorporation into HeLa cells to assess functional changes, by immunofluorescence and luciferase assays. To predict protein structural alterations in the MUT versus WT POU4F3, we also generated 3D structures to compare both types of POU4F3 proteins. Results The WT POU4F3 is ubiquitously present in the nucleus, whereas the MUT form of POU4F3 exhibits a more restricted nuclear presence. This finding is different from other publications, which report a cytoplasmic localization of the MUT POU4F3. We also demonstrated that, as opposed to WT POU4F3, the MUT POU4F3 had 40% reduced luciferase activity. Conclusions The reduced nuclear presence, combined with reduced transcriptional activity, suggests that the POU4F3 c.602T>C variant alters cellular activity and may contribute to the pathogenicity of POU4F3-related hearing loss. It, also, provides more evidence of the pathophysiological characteristics of MFSNHL.
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Abstract
Our understanding of genetic disease(s) has increased exponentially since the completion of human genome sequencing and the development of numerous techniques to detect genetic variants. These techniques have not only allowed us to diagnose genetic disease, but in so doing, also provide increased understanding of the pathogenesis of these diseases to aid in developing appropriate therapeutic options. Additionally, the advent of next-generation or massively parallel sequencing (NGS/MPS) is increasingly being used in the clinical setting, as it can detect a number of abnormalities from point mutations to chromosomal rearrangements as well as aberrations within the transcriptome. In this article, we will discuss the use of multiple techniques that are used in genetic diagnosis. © 2020 by John Wiley & Sons, Inc.
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Affiliation(s)
- Rashmi S Goswami
- Department of Laboratory Medicine and Molecular Diagnostics, Sunnybrook Health Sciences Centre, Toronto, Ontario, Canada.,Sunnybrook Research Institute, Biological Sciences, Odette Cancer Research Program, Toronto, Ontario, Canada.,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada
| | - Shuko Harada
- Department of Pathology, University of Alabama at Birmingham, Birmingham, Alabama
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Miyake K, Shirai K, Nishiyama N, Kawaguchi S, Ohta Y, Kawano A, Usami S, Kitano T, Tsukahara K. Cochlear implantation in a patient with a POU4F3 mutation. Clin Case Rep 2021; 9:298-303. [PMID: 33489177 PMCID: PMC7813023 DOI: 10.1002/ccr3.3520] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2020] [Revised: 10/12/2020] [Accepted: 10/24/2020] [Indexed: 11/21/2022] Open
Abstract
Cochlear implants (CIs) are generally considered useful in the treatment of hereditary hearing loss with progressive deafness. Early CI can be beneficial for maintaining social activities in POU4F3 mutation patients.
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Affiliation(s)
- Keitaro Miyake
- Department of Otolaryngology, Head and Neck SurgeryTokyo Medical UniversityShinjuku‐kuJapan
| | - Kyoko Shirai
- Department of Otolaryngology, Head and Neck SurgeryTokyo Medical UniversityShinjuku‐kuJapan
| | - Nobuhiro Nishiyama
- Department of Clinical OncologyTokyo Medical University Ibaraki Medical CenterInashiki‐gunJapan
| | - Sachie Kawaguchi
- Department of OtorhinolaryngologyYokohama Asahi Chuo General HospitalYokohama‐shiJapan
| | - Yoko Ohta
- Department of Otolaryngology, Head and Neck SurgeryTokyo Medical UniversityShinjuku‐kuJapan
| | - Atsushi Kawano
- Department of Otolaryngology, Head and Neck SurgeryTokyo Medical UniversityShinjuku‐kuJapan
| | - Shin‐ichi Usami
- Department of Hearing Implant SciencesShinshu University School of MedicineMatsumoto‐shiJapan
| | - Tomohiro Kitano
- Department of OtorhinolaryngologyShinshu University School of MedicineMatsumoto‐shiJapan
| | - Kiyoaki Tsukahara
- Department of Otolaryngology, Head and Neck SurgeryTokyo Medical UniversityShinjuku‐kuJapan
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12
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Zhu GJ, Gong S, Ma DB, Tao T, He WQ, Zhang L, Wang F, Qian XY, Zhou H, Fan C, Wang P, Chen X, Zhao W, Sun J, Chen H, Wang Y, Gao X, Zuo J, Zhu MS, Gao X, Wan G. Aldh inhibitor restores auditory function in a mouse model of human deafness. PLoS Genet 2020; 16:e1009040. [PMID: 32970669 PMCID: PMC7553308 DOI: 10.1371/journal.pgen.1009040] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 10/13/2020] [Accepted: 08/10/2020] [Indexed: 02/06/2023] Open
Abstract
Genetic hearing loss is a common health problem with no effective therapy currently available. DFNA15, caused by mutations of the transcription factor POU4F3, is one of the most common forms of autosomal dominant non-syndromic deafness. In this study, we established a novel mouse model of the human DFNA15 deafness, with a Pou4f3 gene mutation (Pou4f3Δ) identical to that found in a familial case of DFNA15. The Pou4f3(Δ/+) mice suffered progressive deafness in a similar manner to the DFNA15 patients. Hair cells in the Pou4f3(Δ/+) cochlea displayed significant stereociliary and mitochondrial pathologies, with apparent loss of outer hair cells. Progression of hearing and outer hair cell loss of the Pou4f3(Δ/+) mice was significantly modified by other genetic and environmental factors. Using Pou4f3(-/+) heterozygous knockout mice, we also showed that DFNA15 is likely caused by haploinsufficiency of the Pou4f3 gene. Importantly, inhibition of retinoic acid signaling by the aldehyde dehydrogenase (Aldh) and retinoic acid receptor inhibitors promoted Pou4f3 expression in the cochlear tissue and suppressed the progression of hearing loss in the mutant mice. These data demonstrate Pou4f3 haploinsufficiency as the main underlying cause of human DFNA15 deafness and highlight the therapeutic potential of Aldh inhibitors for treatment of progressive hearing loss. More than 50% of deafness cases are due to genetic defects with no treatment available. DFNA15, caused by mutations of the transcription factor POU4F3, is one of the most common types of autosomal dominant non-syndromic deafness. Here, we established a novel mouse model with the exact Pou4f3 mutation identified in human patients. The mutant mouse display similar auditory pathophysiology as human patients and exhibit multiple hair cell abnormalities. The onset and severity of hearing loss in the mouse model is highly modifiable to environmental factors, such as aging, noise exposure or genetic backgrounds. Using a new knockout mouse model, we found Pou4f3 haploinsufficiency as the underlying mechanism of human DFNA15. Importantly, we identified Aldh inhibitor as a potent small molecule for upregulation of Pou4f3 and treatment of hearing loss in the mutant mouse. The identification of Aldh inhibitor for treatment of DFNA15 deafness represents a major advance in the unmet medical need for this common form of progressive hearing loss.
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Affiliation(s)
- Guang-Jie Zhu
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
| | - Sihao Gong
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
| | - Deng-Bin Ma
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
| | - Tao Tao
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
| | - Wei-Qi He
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
- Jiangsu Key Laboratory of Neuropsychiatric Diseases and Cambridge-Suda (CAM-SU) Genomic Resource Center, Medical College of Soochow University, Suzhou, China
| | - Linqing Zhang
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
| | - Fang Wang
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
| | - Xiao-Yun Qian
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
| | - Han Zhou
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
| | - Chi Fan
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
| | - Pei Wang
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
| | - Xin Chen
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
| | - Wei Zhao
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
| | - Jie Sun
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
| | - Huaqun Chen
- College of Life Science, Nanjing Normal University, Nanjing, China
| | - Ye Wang
- Nanjing MuCyte Biotechnology Co., Ltd., Nanjing, China
| | - Xiang Gao
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
| | - Jian Zuo
- Department of Biomedical Sciences, School of Medicine, Creighton University, United States of America
| | - Min-Sheng Zhu
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
- Institute for Brain Sciences, Nanjing University, Nanjing, China
- * E-mail: (MSZ); (XG); (GW)
| | - Xia Gao
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
- * E-mail: (MSZ); (XG); (GW)
| | - Guoqiang Wan
- Department of Otorhinolaryngology, Provincial Key Discipline of the affiliated Drum Tower Hospital of Nanjing University and Model Animal Research Center, MOE Key Laboratory of Model Animal for Disease Studies, School of Medicine, Nanjing University, Nanjing, China
- Institute for Brain Sciences, Nanjing University, Nanjing, China
- * E-mail: (MSZ); (XG); (GW)
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13
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Yang S, Gill RA, Zaman QU, Ulhassan Z, Zhou W. Insights on SNP types, detection methods and their utilization in Brassica species: Recent progress and future perspectives. J Biotechnol 2020; 324:11-20. [PMID: 32979432 DOI: 10.1016/j.jbiotec.2020.09.018] [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] [Received: 05/17/2020] [Revised: 09/15/2020] [Accepted: 09/20/2020] [Indexed: 01/09/2023]
Abstract
The genus Brassica, family Brassicaceae (Cruciferae), comprises many important species of oil crops, vegetables and medicinal plants including B. rapa, B. oleracea, B. nigra, B. napus, B. juncea, B. carinata. Genomic researches in Brassica species is constrained by polyploidization, mainly due to its complicated genomic structure. However, rapid development of methods for detecting single nucleotide polymorphisms (SNP), such as next generation sequencing and SNP microarray, has accelerated release of reference Brassica species genomes as well as discovery of large numbers and genome-wide SNPs, thus intensifying forward genetics in this genus. In this review, we summarize biological characteristics, classification and various methods for detecting SNPs, focusing on high-throughput techniques. Moreover, we describe the pivotal roles of SNPs in genetic diversity, linkage map construction and QTL mapping, comparative genomics, linkage disequilibrium and genome-wide association studies. These insights are expected to deepen our understanding and guide further advancements in Brassica species research.
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Affiliation(s)
- Su Yang
- College of Life Sciences, China Jiliang University, Hangzhou 310018, China
| | - Rafaqat Ali Gill
- Oil Crops Research Institute, Chinese Academy of Agricultural Science, Wuhan 430062, China.
| | - Qamar U Zaman
- Oil Crops Research Institute, Chinese Academy of Agricultural Science, Wuhan 430062, China
| | - Zaid Ulhassan
- Institute of Crop Science, Ministry of Agriculture and Rural Affairs Laboratory of Spectroscopy Sensing, Zhejiang University, Hangzhou 310058, China
| | - Weijun Zhou
- Institute of Crop Science, Ministry of Agriculture and Rural Affairs Laboratory of Spectroscopy Sensing, Zhejiang University, Hangzhou 310058, China
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14
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Four Novel Variants in POU4F3 Cause Autosomal Dominant Nonsyndromic Hearing Loss. Neural Plast 2020; 2020:6137083. [PMID: 32684921 PMCID: PMC7349627 DOI: 10.1155/2020/6137083] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/16/2020] [Accepted: 06/09/2020] [Indexed: 12/30/2022] Open
Abstract
Hereditary hearing loss is one of the most common sensory disabilities worldwide. Mutation of POU domain class 4 transcription factor 3 (POU4F3) is considered the pathogenic cause of autosomal dominant nonsyndromic hearing loss (ADNSHL), designated as autosomal dominant nonsyndromic deafness 15. In this study, four novel variants in POU4F3, c.696G>T (p.Glu232Asp), c.325C>T (p.His109Tyr), c.635T>C (p.Leu212Pro), and c.183delG (p.Ala62Argfs∗22), were identified in four different Chinese families with ADNSHL by targeted next-generation sequencing and Sanger sequencing. Based on the American College of Medical Genetics and Genomics guidelines, c.183delG (p.Ala62Argfs∗22) is classified as a pathogenic variant, c.696G>T (p.Glu232Asp) and c.635T>C (p.Leu212Pro) are classified as likely pathogenic variants, and c.325C>T (p.His109Tyr) is classified as a variant of uncertain significance. Based on previous reports and the results of this study, we speculated that POU4F3 pathogenic variants are significant contributors to ADNSHL in the East Asian population. Therefore, screening of POU4F3 should be a routine examination for the diagnosis of hereditary hearing loss.
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15
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Bai X, Zhang F, Xiao Y, Jin Y, Zheng Q, Wang H, Xu L. Identification of two novel mutations in POU4F3 gene associated with autosomal dominant hearing loss in Chinese families. J Cell Mol Med 2020; 24:6978-6987. [PMID: 32390314 PMCID: PMC7299729 DOI: 10.1111/jcmm.15359] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Revised: 04/14/2020] [Accepted: 04/16/2020] [Indexed: 11/29/2022] Open
Abstract
Autosomal dominant non‐syndromic hearing loss is genetically heterogeneous with 47 genes identified to date, including POU4F3. In this study, by using a next‐generation sequencing panel targeting 127 deafness genes, we identified a pathogenic frameshift mutation c.704_705del and a missense mutation c.593G>A in two three‐generation Chinese families with late‐onset progressive ADNSHL, respectively. The novel mutations of POU4F3 co‐segregated with the deafness phenotype in these two families. c.704_705del caused a frameshift p.T235fs and c.593G>A caused an amino acid substitution of p.R198H. Both mutations led to an abnormal and incomplete protein structure. POU4F3 with either of the two mutations was transiently transfected into HEI‐OC1 and HEK 293 cell lines and immunofluorescence assay was performed to investigate the subcellular localization of mutated protein. The results indicated that both c.704_705del (p.T235fs) and c.593G>A (p.R198H) could impair the nuclear localization function of POU4F3. The p.R198H POU4F3 protein was detected as a weak band of the correct molecular weight, indicating that the stability of p.R198H POU4F3 differed from that of the wild‐type protein. While, the p.T235fs POU4F3 protein was expressed with a smaller molecular weight, implying this mutation result in a frameshift and premature termination of the POU4F3 protein. In summary, we report two novel mutations of POU4F3 associated with progressive ADNSHL and explored their effects on POU4F3 nuclear localization. These findings expanded the mutation spectrum of POU4F3 and provided new knowledge for the pathogenesis of POU4F3 in hearing loss.
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Affiliation(s)
- Xiaohui Bai
- Otologic Center, Shandong Provincial ENT Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China.,Department of Clinical Laboratory, Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Fengguo Zhang
- Otologic Center, Shandong Provincial ENT Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yun Xiao
- Otologic Center, Shandong Provincial ENT Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Yu Jin
- Otologic Center, Shandong Provincial ENT Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Qingyin Zheng
- Department of Otolaryngology-Head & Neck Surgery, Case Western Reserve University, Cleveland, OH, USA
| | - Haibo Wang
- Otologic Center, Shandong Provincial ENT Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Lei Xu
- Otologic Center, Shandong Provincial ENT Hospital, Cheeloo College of Medicine, Shandong University, Jinan, China
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16
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Xu F, Yan W, Cheng Y. Pou4f3 gene mutation promotes autophagy and apoptosis of cochlear hair cells in cisplatin-induced deafness mice. Arch Biochem Biophys 2019; 680:108224. [PMID: 31830441 DOI: 10.1016/j.abb.2019.108224] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2019] [Revised: 12/04/2019] [Accepted: 12/06/2019] [Indexed: 11/18/2022]
Abstract
Pou4f3 plays an important role in the development of hair cells in the inner ear sensory epithelia. Autophagy is related to the auditory damage. However, the role and mechanism of Pou4f3 on drug-induced ototoxicity are incompletely understood. Hence, this study aimed to explore the effects of Pou4f3 on the apoptosis of cochlear hair cells (CHCs) and to explore whether autophagy was involved in this process. The cisplatin was used to produce a loss of CHCs to create a murine model of deafness. The AAV vectors were delivered into the scala media through the lateral wall. Compared with the control mice, the cisplatin-treated mice exhibited significantly enhanced apoptosis and autophagy in the cochleae, accompanied by a notably decreased Pou4f3 levels. Both mutation and knockdown of Pou4f3 promoted the apoptosis- and autophagy-related protein levels, and enhanced the cisplatin-induced levels of apoptosis- and autophagy-related proteins. Furthermore, the autophagy activator rapamycin promoted the apoptosis and autophagy in the cochlea. In addition, the autophagy inhibitor 3-MA overturned the promoting effect of Pou4f3 knockdown on the apoptosis and autophagy. Collectively, in cisplatin-induced deafness mice, the Pou4f3 gene mutation facilitated apoptosis of cochlear hair cells, at least partially, through inducing autophagy.
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Affiliation(s)
- Feilong Xu
- Department of Otology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, People's Republic of China.
| | - Wenya Yan
- Department of Otology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, People's Republic of China
| | - Yanjie Cheng
- Department of Otology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, Henan, People's Republic of China
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17
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A Missense Mutation in POU4F3 Causes Midfrequency Hearing Loss in a Chinese ADNSHL Family. BIOMED RESEARCH INTERNATIONAL 2018; 2018:5370802. [PMID: 29850532 PMCID: PMC5904794 DOI: 10.1155/2018/5370802] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Accepted: 03/05/2018] [Indexed: 11/18/2022]
Abstract
Hereditary nonsyndromic hearing loss is extremely heterogeneous. Mutations in the POU class 4 transcription factor 3 (POU4F3) are known to cause autosomal dominant nonsyndromic hearing loss linked to the loci of DFNA15. In this study, we describe a pathogenic missense mutation in POU4F3 in a four-generation Chinese family (6126) with midfrequency, progressive, and postlingual autosomal dominant nonsyndromic hearing loss (ADNSHL). By combining targeted capture of 129 known deafness genes, next-generation sequencing, and bioinformatic analysis, we identified POU4F3 c.602T>C (p.Leu201Pro) as the disease-causing variant. This variant cosegregated with hearing loss in other family members but was not detected in 580 normal controls or the ExAC database and could be classified as a “pathogenic variant” according to the American College of Medical Genetics and Genomics guidelines. We conclude that POU4F3 c.602T>C (p.Leu201Pro) is related to midfrequency hearing loss in this family. Routine examination of POU4F3 is necessary for the genetic diagnosis of midfrequency hearing loss.
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18
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Guo T, Tan ZP, Chen HM, Zheng DY, Liu L, Huang XG, Chen P, Luo H, Yang YF. An effective combination of whole-exome sequencing and runs of homozygosity for the diagnosis of primary ciliary dyskinesia in consanguineous families. Sci Rep 2017; 7:7905. [PMID: 28801648 PMCID: PMC5554225 DOI: 10.1038/s41598-017-08510-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Accepted: 07/11/2017] [Indexed: 01/26/2023] Open
Abstract
Primary ciliary dyskinesia (PCD) is clinically characterized by neonatal respiratory distress, chronic sinusitis, bronchiectasis and infertility, and situs inversus in 50% of the patients. PCD is a result of mutations in genes encoding proteins involved in ciliary function, and is primarily inherited in an autosomal recessive fashion. Diagnosis of PCD is often a challenging task due to its high clinical and genetic heterogeneities. In the present study, we attempted to use whole-exome sequencing (WES) combined with runs of homozygosity (ROH) approaches to identify the genetic defects in four Chinese consanguineous families with clinical PCD. We successfully identified three recently acknowledged PCD genes: DYX1C1, CCNO and ARMC4, and one well-characterized PCD gene, DNAI1. Our study provides compelling evidence that WES in combination with ROH analysis is an efficient diagnostic tool for identifying genetic causes of PCD in consanguineous families. Furthermore, our work expands the genetic mutation spectrum in PCD, and provides the additional tools to better serve the counseling of the families with PCD.
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Affiliation(s)
- Ting Guo
- Department of Respiratory Medicine, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, China.,Research Unit of Respiratory Disease, Central South University, Changsha, Hunan, 410011, China.,Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, Hunan, 410011, China
| | - Zhi-Ping Tan
- Central South University Center for Clinical Gene Diagnosis and Treatment, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, China.,Department of Cardiovascular Surgery, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, China
| | - Hua-Mei Chen
- Department of Respiratory Medicine, Chang Sha Central Hospital, Changsha, Hunan, 410011, China
| | - Dong-Yuan Zheng
- Department of Respiratory Medicine, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, China.,Research Unit of Respiratory Disease, Central South University, Changsha, Hunan, 410011, China.,Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, Hunan, 410011, China
| | - Lv Liu
- Department of Respiratory Medicine, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, China.,Research Unit of Respiratory Disease, Central South University, Changsha, Hunan, 410011, China.,Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, Hunan, 410011, China
| | - Xin-Gang Huang
- Department of Respiratory Medicine, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, China.,Research Unit of Respiratory Disease, Central South University, Changsha, Hunan, 410011, China.,Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, Hunan, 410011, China
| | - Ping Chen
- Department of Respiratory Medicine, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, China.,Research Unit of Respiratory Disease, Central South University, Changsha, Hunan, 410011, China.,Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, Hunan, 410011, China
| | - Hong Luo
- Department of Respiratory Medicine, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, China. .,Research Unit of Respiratory Disease, Central South University, Changsha, Hunan, 410011, China. .,Diagnosis and Treatment Center of Respiratory Disease, Central South University, Changsha, Hunan, 410011, China.
| | - Yi-Feng Yang
- Central South University Center for Clinical Gene Diagnosis and Treatment, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, China. .,Department of Cardiovascular Surgery, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, China.
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19
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Lin YH, Lin YH, Lu YC, Liu TC, Chen CY, Hsu CJ, Chen PL, Wu CC. A novel missense variant in the nuclear localization signal of POU4F3 causes autosomal dominant non-syndromic hearing loss. Sci Rep 2017; 7:7551. [PMID: 28790396 PMCID: PMC5548901 DOI: 10.1038/s41598-017-08236-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 07/10/2017] [Indexed: 02/01/2023] Open
Abstract
Autosomal dominant non-syndromic hearing loss (ADNSHL) is genetically heterogeneous with more than 35 genes identified to date. Using a massively parallel sequencing panel targeting 159 deafness genes, we identified a novel missense variant of POU4F3 (c.982A>G, p.Lys328Glu) which co-segregated with the deafness phenotype in a three-generation Taiwanese family with ADNSHL. This variant could be classified as a "pathogenic variant" according to the American College of Medical Genetics and Genomics guidelines. We then performed subcellular localization experiments and confirmed that p.Lys328Glu compromised transportation of POU4F3 from the cytoplasm to the nucleus. POU3F4 p.Lys328Glu was located within a bipartite nuclear localization signal (NLS), and was the first missense variant in bipartite NLS of POU4F3 validated in functional studies. These findings expanded the mutation spectrum of POU4F3 and provided insight into the pathogenesis associated with aberrant POU4F3 localization.
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Affiliation(s)
- Yin-Hung Lin
- Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan.,Graduate Institute of Medical Genomics and Proteomics, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Yi-Hsin Lin
- Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan.,Graduate Institute of Molecular Medicine, National Taiwan University College of Medicine, Taipei, Taiwan
| | - Ying-Chang Lu
- Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan
| | - Tien-Chen Liu
- Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan
| | - Chien-Yu Chen
- Department of Bio-Industrial Mechatronics Engineering, National Taiwan University, Taipei, Taiwan
| | - Chuan-Jen Hsu
- Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan. .,Department of Otolaryngology, Taichung Tzu-Chi Hospital, Taichung, Taiwan.
| | - Pei-Lung Chen
- Graduate Institute of Medical Genomics and Proteomics, National Taiwan University College of Medicine, Taipei, Taiwan. .,Graduate Institute of Molecular Medicine, National Taiwan University College of Medicine, Taipei, Taiwan. .,Department of Medical Genetics, National Taiwan University Hospital, Taipei, Taiwan. .,Graduate Institute of Clinical Medicine, National Taiwan University College of Medicine, Taipei, Taiwan. .,Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan.
| | - Chen-Chi Wu
- Department of Otolaryngology, National Taiwan University Hospital, Taipei, Taiwan. .,Department of Medical Genetics, National Taiwan University Hospital, Taipei, Taiwan.
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20
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Kitano T, Miyagawa M, Nishio SY, Moteki H, Oda K, Ohyama K, Miyazaki H, Hidaka H, Nakamura KI, Murata T, Matsuoka R, Ohta Y, Nishiyama N, Kumakawa K, Furutate S, Iwasaki S, Yamada T, Ohta Y, Uehara N, Noguchi Y, Usami SI. POU4F3 mutation screening in Japanese hearing loss patients: Massively parallel DNA sequencing-based analysis identified novel variants associated with autosomal dominant hearing loss. PLoS One 2017; 12:e0177636. [PMID: 28545070 PMCID: PMC5435223 DOI: 10.1371/journal.pone.0177636] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2016] [Accepted: 05/01/2017] [Indexed: 11/18/2022] Open
Abstract
A variant in a transcription factor gene, POU4F3, is responsible for autosomal dominant nonsyndromic hereditary hearing loss, DFNA15. To date, 14 variants, including a whole deletion of POU4F3, have been reported to cause HL in various ethnic groups. In the present study, genetic screening for POU4F3 variants was carried out for a large series of Japanese hearing loss (HL) patients to clarify the prevalence and clinical characteristics of DFNA15 in the Japanese population. Massively parallel DNA sequencing of 68 target candidate genes was utilized in 2,549 unrelated Japanese HL patients (probands) to identify genomic variations responsible for HL. The detailed clinical features in patients with POU4F3 variants were collected from medical charts and analyzed. Novel 12 POU4F3 likely pathogenic variants (six missense variants, three frameshift variants, and three nonsense variants) were successfully identified in 15 probands (2.5%) among 602 families exhibiting autosomal dominant HL, whereas no variants were detected in the other 1,947 probands with autosomal recessive or inheritance pattern unknown HL. To obtain the audiovestibular configuration of the patients harboring POU4F3 variants, we collected audiograms and vestibular symptoms of the probands and their affected family members. Audiovestibular phenotypes in a total of 24 individuals from the 15 families possessing variants were characterized by progressive HL, with a large variation in the onset age and severity with or without vestibular symptoms observed. Pure-tone audiograms indicated the most prevalent configuration as mid-frequency HL type followed by high-frequency HL type, with asymmetry observed in approximately 20% of affected individuals. Analysis of the relationship between age and pure-tone average suggested that individuals with truncating variants showed earlier onset and slower progression of HL than did those with non-truncating variants. The present study showed that variants in POU4F3 were a common cause of autosomal dominant HL.
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Affiliation(s)
- Tomohiro Kitano
- Department of Otorhinolaryngology, Shinshu University School of Medicine, Matsumoto, Japan
| | - Maiko Miyagawa
- Department of Otorhinolaryngology, Shinshu University School of Medicine, Matsumoto, Japan
- Department of Hearing Implant Sciences, Shinshu University School of Medicine, Matsumoto, Japan
| | - Shin-ya Nishio
- Department of Otorhinolaryngology, Shinshu University School of Medicine, Matsumoto, Japan
- Department of Hearing Implant Sciences, Shinshu University School of Medicine, Matsumoto, Japan
| | - Hideaki Moteki
- Department of Otorhinolaryngology, Shinshu University School of Medicine, Matsumoto, Japan
- Department of Hearing Implant Sciences, Shinshu University School of Medicine, Matsumoto, Japan
| | - Kiyoshi Oda
- Department of Otorhinolaryngology, Tohoku Rosai Hospital, Sendai, Japan
| | - Kenji Ohyama
- Department of Otorhinolaryngology, Tohoku Rosai Hospital, Sendai, Japan
| | - Hiromitsu Miyazaki
- Department of Otorhinolaryngology-Head and Neck Surgery, Tohoku University School of Medicine, Sendai, Japan
| | - Hiroshi Hidaka
- Department of Otorhinolaryngology-Head and Neck Surgery, Tohoku University School of Medicine, Sendai, Japan
| | - Ken-ichi Nakamura
- Department of Otolaryngology-Head and Neck Surgery, Jichi Medical University School of Medicine, Shimotsuke, Japan
| | - Takaaki Murata
- Department of Otolaryngology-Head and Neck Surgery, Gunma University Graduate School of Medicine, Maebashi, Japan
| | - Rina Matsuoka
- Department of Otorhinolaryngology, Juntendo University Faculty of Medicine, Tokyo, Japan
| | - Yoko Ohta
- Department of Otorhinolaryngology Head and Neck Surgery, Tokyo Medical University, Tokyo, Japan
| | - Nobuhiro Nishiyama
- Department of Otorhinolaryngology Head and Neck Surgery, Tokyo Medical University, Tokyo, Japan
| | - Kozo Kumakawa
- Department of Otorhinolaryngology, Toranomon Hospital, Tokyo, Japan
| | - Sakiko Furutate
- Department of Otorhinolaryngology, International University of Health and Welfare, Mita Hospital, Tokyo, Japan
| | - Satoshi Iwasaki
- Department of Otorhinolaryngology, International University of Health and Welfare, Mita Hospital, Tokyo, Japan
| | - Takechiyo Yamada
- Department of Otorhinolaryngology-Head and Neck Surgery, University of Fukui, Fukui, Japan
| | - Yumi Ohta
- Department of Otorhinolaryngology-Head and Neck Surgery, Osaka University Graduate School of Medicine, Osaka, Japan
| | - Natsumi Uehara
- Department of Otolaryngology-Head and Neck Surgery, Kobe University School of Medicine, Kobe, Japan
| | - Yoshihiro Noguchi
- Department of Hearing Implant Sciences, Shinshu University School of Medicine, Matsumoto, Japan
| | - Shin-ichi Usami
- Department of Otorhinolaryngology, Shinshu University School of Medicine, Matsumoto, Japan
- Department of Hearing Implant Sciences, Shinshu University School of Medicine, Matsumoto, Japan
- * E-mail:
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21
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Mutation in the Hair Cell Specific Gene POU4F3 Is a Common Cause for Autosomal Dominant Nonsyndromic Hearing Loss in Chinese Hans. Neural Plast 2016; 2016:9890827. [PMID: 28053790 PMCID: PMC5178374 DOI: 10.1155/2016/9890827] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Revised: 10/26/2016] [Accepted: 11/02/2016] [Indexed: 11/17/2022] Open
Abstract
Autosomal dominant nonsyndromic hearing loss (ADNSHL) is extremely heterogeneous. So far the genetic etiological contribution of the gene POU4F3 associated with ADNSHL has been rarely reported. In our previous study, a c.603_604delGG mutation in the hair cell specific gene POU4F3 has been identified as the pathogenic cause in one of the seven Chinese Han ADNSHL families. In the present study, we performed targeted next-generation sequencing of 144 known deafness genes in another nine Chinese Han ADNSHL families and identified two more novel mutations in POU4F3, p.Leu311Pro and c.120+1G>C, as the pathogenic cause. Clinical characterization of the affected individuals in these three families showed that the three POU4F3 mutations may lead to progressive hearing loss with variable ages of onset and degrees of severity. Our results suggested that mutations in POU4F3 are a relatively common cause (3/16) for ADNSHL in Chinese Hans, which should be routinely screened in such cases during genetic testing.
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22
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A Novel Nonsense Mutation of POU4F3 Gene Causes Autosomal Dominant Hearing Loss. Neural Plast 2016; 2016:1512831. [PMID: 27999687 PMCID: PMC5143711 DOI: 10.1155/2016/1512831] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2016] [Revised: 10/11/2016] [Accepted: 10/24/2016] [Indexed: 11/18/2022] Open
Abstract
POU4F3 gene encodes a transcription factor which plays an essential role in the maturation and maintenance of hair cells in cochlea and vestibular system. Several mutations of POU4F3 have been reported to cause autosomal dominant nonsyndromic hearing loss in recent years. In this study, we describe a pathogenic nonsense mutation located in POU4F3 in a four-generation Chinese family. Target region capture sequencing was performed to search for the candidate mutations from 81 genes related to nonsyndromic hearing loss in this family. A novel nonsense mutation of POU4F3, c.337C>T (p. Gln113⁎), was identified in a Chinese family characterized by late-onset progressive nonsyndromic hearing loss. The novel mutation cosegregated with hearing loss in this family and was absent in 200 ethnicity-matched controls. The mutation led to a stop codon and thus a truncated protein with no functional domains remained. Transient transfection and immunofluorescence assay revealed that the subcellular localization of the truncated protein differed markedly from normal protein, which could be the underlying reason for complete loss of its normal function. Here, we report the first nonsense mutation of POU4F3 associated with progressive hearing loss and explored the possible underlying mechanism. Routine examination of POU4F3 is necessary for the genetic diagnosis of hereditary hearing loss in the future.
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23
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Сhurbanov AY, Karafet TM, Morozov IV, Mikhalskaia VY, Zytsar MV, Bondar AA, Posukh OL. Whole Exome Sequencing Reveals Homozygous Mutations in RAI1, OTOF, and SLC26A4 Genes Associated with Nonsyndromic Hearing Loss in Altaian Families (South Siberia). PLoS One 2016; 11:e0153841. [PMID: 27082237 PMCID: PMC4833413 DOI: 10.1371/journal.pone.0153841] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2015] [Accepted: 04/05/2016] [Indexed: 12/15/2022] Open
Abstract
Hearing loss (HL) is one of the most common sensorineural disorders and several dozen genes contribute to its pathogenesis. Establishing a genetic diagnosis of HL is of great importance for clinical evaluation of deaf patients and for estimating recurrence risks for their families. Efforts to identify genes responsible for HL have been challenged by high genetic heterogeneity and different ethnic-specific prevalence of inherited deafness. Here we present the utility of whole exome sequencing (WES) for identifying candidate causal variants for previously unexplained nonsyndromic HL of seven patients from four unrelated Altaian families (the Altai Republic, South Siberia). The WES analysis revealed homozygous missense mutations in three genes associated with HL. Mutation c.2168A>G (SLC26A4) was found in one family, a novel mutation c.1111G>C (OTOF) was revealed in another family, and mutation c.5254G>A (RAI1) was found in two families. Sanger sequencing was applied for screening of identified variants in an ethnically diverse cohort of other patients with HL (n = 116) and in Altaian controls (n = 120). Identified variants were found only in patients of Altaian ethnicity (n = 93). Several lines of evidences support the association of homozygosity for discovered variants c.5254G>A (RAI1), c.1111C>G (OTOF), and c.2168A>G (SLC26A4) with HL in Altaian patients. Local prevalence of identified variants implies possible founder effect in significant number of HL cases in indigenous population of the Altai region. Notably, this is the first reported instance of patients with RAI1 missense mutation whose HL is not accompanied by specific traits typical for Smith-Magenis syndrome. Presumed association of RAI1 gene variant c.5254G>A with isolated HL needs to be proved by further experimental studies.
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Affiliation(s)
- Alexander Y. Сhurbanov
- Arizona Research Laboratories, Division of Biotechnology, University of Arizona, Tucson, Arizona, United States of America
| | - Tatiana M. Karafet
- Arizona Research Laboratories, Division of Biotechnology, University of Arizona, Tucson, Arizona, United States of America
| | - 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
| | - Valeriia Yu. Mikhalskaia
- Novosibirsk State University, Novosibirsk, Russian Federation
- Laboratory of Human Molecular Genetics, Federal Research Center Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation
| | - Marina V. Zytsar
- Novosibirsk State University, Novosibirsk, Russian Federation
- Laboratory of Human Molecular Genetics, Federal Research Center Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, 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
- Laboratory of Human Molecular Genetics, Federal Research Center Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russian Federation
- * E-mail:
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24
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Tornari C, Towers ER, Gale JE, Dawson SJ. Regulation of the orphan nuclear receptor Nr2f2 by the DFNA15 deafness gene Pou4f3. PLoS One 2014; 9:e112247. [PMID: 25372459 PMCID: PMC4221282 DOI: 10.1371/journal.pone.0112247] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2014] [Accepted: 10/08/2014] [Indexed: 12/23/2022] Open
Abstract
Hair cells are the mechanotransducing cells of the inner ear that are essential for hearing and balance. POU4F3--a POU-domain transcription factor selectively expressed by these cells--has been shown to be essential for hair cell differentiation and survival in mice and its mutation in humans underlies late-onset progressive hearing loss (DFNA15). The downstream targets of POU4F3 are required for hair cell differentiation and survival. We aimed to identify such targets in order to elucidate the molecular pathways involved in hair cell production and maintenance. The orphan thyroid nuclear receptor Nr2f2 was identified as a POU4F3 target using a subtractive hybridization strategy and EMSA analysis showed that POU4F3 binds to two sites in the Nr2f2 5' flanking region. These sites were shown to be required for POU4F3 activation as their mutation leads to a reduction in the response of an Nr2f2 5' flanking region reporter construct to POU4F3. Immunocytochemistry was carried out in the developing and adult inner ear in order to investigate the relevance of this interaction in hearing. NR2F2 expression in the postnatal mouse organ of Corti was shown to be detectable in all sensory epithelia examined and characterised. These data demonstrate that Nr2f2 is a direct target of POU4F3 in vitro and that this regulatory relationship may be relevant to hair cell development and survival.
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Affiliation(s)
| | - Emily R. Towers
- UCL Ear Institute, University College London, London, United Kingdom
| | - Jonathan E. Gale
- UCL Ear Institute, University College London, London, United Kingdom
| | - Sally J. Dawson
- UCL Ear Institute, University College London, London, United Kingdom
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25
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Gao X, Dai P. Impact of next-generation sequencing on molecular diagnosis of inherited non-syndromic hearing loss. J Otol 2014. [DOI: 10.1016/j.joto.2014.11.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
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26
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Teare MD, Santibañez Koref MF. Linkage analysis and the study of Mendelian disease in the era of whole exome and genome sequencing. Brief Funct Genomics 2014; 13:378-83. [PMID: 25024279 DOI: 10.1093/bfgp/elu024] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Whole exome and whole genome sequencing are now routinely used in the study of inherited disease, and some of their major successes have been the identification of genes involved in disease predisposition in pedigrees where disease seems to follow Mendelian inheritance patterns. These successes include scenarios where only a single individual was sequenced and raise the question whether linkage analysis has become superfluous. Linkage analysis requires genome-wide genotyping on family-based data, and traditionally the linkage analysis was performed before the targeting sequencing stage. However, methods are emerging that seek to exploit the capability of linkage analysis to integrate data both across individuals and across pedigrees. This ability has been exploited to select samples used for sequencing studies and to identify among the variants uncovered by sequencing those mapping to regions likely to contain the gene of interest and, more generally, to improve variant detection. So, although the formal isolated linkage analysis stage is less commonly seen, when uncovering the genetic basis of Mendelian disease, methods relying heavily on genetic linkage analysis principles are being integrated directly into the whole mapping process ranging from sample selection to variant calling and filtering.
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27
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Azaiez H, Booth KT, Bu F, Huygen P, Shibata SB, Shearer AE, Kolbe D, Meyer N, Black-Ziegelbein EA, Smith RJH. TBC1D24 mutation causes autosomal-dominant nonsyndromic hearing loss. Hum Mutat 2014; 35:819-23. [PMID: 24729539 DOI: 10.1002/humu.22557] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2014] [Accepted: 03/26/2014] [Indexed: 11/08/2022]
Abstract
Hereditary hearing loss is extremely heterogeneous. Over 70 genes have been identified to date, and with the advent of massively parallel sequencing, the pace of novel gene discovery has accelerated. In a family segregating progressive autosomal-dominant nonsyndromic hearing loss (NSHL), we used OtoSCOPE® to exclude mutations in known deafness genes and then performed segregation mapping and whole-exome sequencing to identify a unique variant, p.Ser178Leu, in TBC1D24 that segregates with the hearing loss phenotype. TBC1D24 encodes a GTPase-activating protein expressed in the cochlea. Ser178 is highly conserved across vertebrates and its change is predicted to be damaging. Other variants in TBC1D24 have been associated with a panoply of clinical symptoms including autosomal recessive NSHL, syndromic hearing impairment associated with onychodystrophy, osteodystrophy, mental retardation, and seizures (DOORS syndrome), and a wide range of epileptic disorders.
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Affiliation(s)
- Hela Azaiez
- Molecular Otolaryngology & Renal Research Laboratories, Department of Otolaryngology-Head and Neck Surgery, University of Iowa Hospitals and Clinics, Iowa City, Iowa
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