1
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Hou Y, Shi Y, Liu L, Duan S. Novel PTPRQ variants associated with hearing loss in a Chinese family PTPRQ variants in Chinese hearing loss. Front Genet 2024; 15:1399760. [PMID: 39205941 PMCID: PMC11349657 DOI: 10.3389/fgene.2024.1399760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2024] [Accepted: 08/05/2024] [Indexed: 09/04/2024] Open
Abstract
Introduction Hearing loss is one of the most prevalent congenital sensory disorders. Over 50% of congenital hearing loss cases are attributed to genetic factors. The PTPRQ gene encodes the protein tyrosine phosphatase receptor Q, which plays an important role in maintaining the structure and function of the stereocilia of hair cells. Variants in the PTPRQ gene have been implicated in hereditary sensorineural hearing loss. Methods and Results Utilizing next-generation sequencing technology, we identified novel compound heterozygous variants (c.977G>A:p.W326X and c.6742C>T:p.Q2248X) in the PTPRQ gene within a Chinese national lineage, marking the first association of these variants with hereditary sensorineural hearing loss. Discussion Our findings further emphasize the critical role of PTPRQ in auditory function and contribute to a more comprehensive understanding of PTPRQ-associated hearing loss mechanisms, aiding in clinical management and genetic counseling.
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Affiliation(s)
| | | | | | - Shihong Duan
- Department of Otolaryngology-Head and Neck Surgery, Lanzhou University Second Hospital, Lanzhou, China
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2
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Sakuma N, Nishio SY, Goto SI, Honkura Y, Oda K, Takeda H, Kobayashi M, Kumakawa K, Iwasaki S, Takahashi M, Ito T, Arai Y, Isono Y, Obara N, Matsunobu T, Okubo K, Usami SI. Detailed Clinical Features of PTPRQ-Associated Hearing Loss Identified in a Large Japanese Hearing Loss Cohort. Genes (Basel) 2024; 15:489. [PMID: 38674423 PMCID: PMC11050587 DOI: 10.3390/genes15040489] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2024] [Revised: 04/10/2024] [Accepted: 04/10/2024] [Indexed: 04/28/2024] Open
Abstract
The PTPRQ gene has been identified as one of the genes responsible for non-syndromic sensorineural hearing loss (SNHL), and assigned as DFNA73 and DFNB84. To date, about 30 causative PTPRQ variants have been reported to cause SNHL. However, the detailed clinical features of PTPRQ-associated hearing loss (HL) remain unclear. In this study, 15,684 patients with SNHL were enrolled and genetic analysis was performed using massively parallel DNA sequencing (MPS) for 63 target deafness genes. We identified 17 possibly disease-causing PTPRQ variants in 13 Japanese patients, with 15 of the 17 variants regarded as novel. The majority of variants identified in this study were loss of function. Patients with PTPRQ-associated HL mostly showed congenital or childhood onset. Their hearing levels at high frequency deteriorated earlier than that at low frequency. The severity of HL progressed from moderate to severe or profound HL. Five patients with profound or severe HL received cochlear implantation, and the postoperative sound field threshold levels and discrimination scores were favorable. These findings will contribute to a greater understanding of the clinical features of PTPRQ-associated HL and may be relevant in clinical practice.
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Affiliation(s)
- Naoko Sakuma
- Department of Otorhinolaryngology, Head and Neck Surgery, Nippon Medical School, Tokyo 113-8603, Japan; (N.S.); (T.M.); (K.O.)
| | - Shin-ya Nishio
- Department of Hearing Implant Sciences, Shinshu University School of Medicine, 3-1-1, Asahi, Matsumoto City 390-8621, Japan;
| | - Shin-ichi Goto
- Department of Otorhinolaryngology, Hirosaki University Graduate School of Medicine, Hirosaki 036-8560, Japan;
| | - Yohei Honkura
- Department of Otolaryngology-Head and Neck Surgery, Tohoku University School of Medicine, Sendai 980-8575, Japan;
| | - Kiyoshi Oda
- Department of Otolaryngology, Tohoku Rosai Hospital, Sendai 981-8563, Japan;
| | - Hidehiko Takeda
- Department of Otorhinolaryngology, Toranomon Hospital, Tokyo 105-8470, Japan; (H.T.); (M.K.)
| | - Marina Kobayashi
- Department of Otorhinolaryngology, Toranomon Hospital, Tokyo 105-8470, Japan; (H.T.); (M.K.)
| | - Kozo Kumakawa
- Department of Otolaryngology, Kamio Memorial Hospital, Tokyo 101-0063, Japan;
- Akasaka Toranomon Clinic, Tokyo 107-0052, Japan
| | - Satoshi Iwasaki
- Department of Otorhinolaryngology, International University of Health and Welfare, Mita Hospital, Tokyo 108-8329, Japan; (S.I.); (M.T.)
| | - Masahiro Takahashi
- Department of Otorhinolaryngology, International University of Health and Welfare, Mita Hospital, Tokyo 108-8329, Japan; (S.I.); (M.T.)
| | - Taku Ito
- Department of Otorhinolaryngology, Tokyo Medical and Dental University, Tokyo 113-8510, Japan;
| | - Yasuhiro Arai
- Department of Otorhinolaryngology-Head and Neck Surgery, Yokohama City University School of Medicine, Yokohama 236-0004, Japan;
| | - Yasuhiro Isono
- Department of Otolaryngology, Yokohama City University Medical Center, Yokohama 232-0024, Japan;
| | - Natsuko Obara
- Department of Otolaryngology, Gifu University Graduate School of Medicine, Gifu City 501-1194, Japan;
| | - Takeshi Matsunobu
- Department of Otorhinolaryngology, Head and Neck Surgery, Nippon Medical School, Tokyo 113-8603, Japan; (N.S.); (T.M.); (K.O.)
| | - Kimihiro Okubo
- Department of Otorhinolaryngology, Head and Neck Surgery, Nippon Medical School, Tokyo 113-8603, Japan; (N.S.); (T.M.); (K.O.)
| | - Shin-ichi Usami
- Department of Hearing Implant Sciences, Shinshu University School of Medicine, 3-1-1, Asahi, Matsumoto City 390-8621, Japan;
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3
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Jin Y, Liu XZ, Xie L, Xie W, Chen S, Sun Y. Targeted Next-Generation Sequencing Identified Novel Compound Heterozygous Variants in the PTPRQ Gene Causing Autosomal Recessive Hearing Loss in a Chinese Family. Front Genet 2022; 13:884522. [PMID: 35899188 PMCID: PMC9310072 DOI: 10.3389/fgene.2022.884522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Accepted: 05/26/2022] [Indexed: 11/28/2022] Open
Abstract
Hearing loss is among the most common congenital sensory impairments. Genetic causes account for more than 50% of the cases of congenital hearing loss. The PTPRQ gene, encoding protein tyrosine phosphatase receptor Q, plays an important role in maintaining the stereocilia structure and function of hair cells. Mutations in the PTPRQ gene have been reported to cause hereditary sensorineural hearing loss. By using next-generation sequencing and Sanger sequencing, we identified a novel compound heterozygous mutation (c.997 G > A and c.6603-3 T > G) of the PTPRQ gene in a Chinese consanguineous family. This is the first report linking these two mutations to recessive hereditary sensorineural hearing loss. These findings contribute to the understanding of the relationship between genotype and hearing phenotype of PTPRQ-related hearing loss, which may be helpful to clinical management and genetic counseling.
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Affiliation(s)
- Yuan Jin
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiao-Zhou Liu
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Le Xie
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wen Xie
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Sen Chen
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yu Sun
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
- Tongji Medical College, Institute of Otorhinolaryngology, Huazhong University of Science and Technology, Wuhan, China
- *Correspondence: Yu Sun,
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4
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Usami SI, Nishio SY. The genetic etiology of hearing loss in Japan revealed by the social health insurance-based genetic testing of 10K patients. Hum Genet 2021; 141:665-681. [PMID: 34599366 PMCID: PMC9035015 DOI: 10.1007/s00439-021-02371-3] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Accepted: 09/14/2021] [Indexed: 11/28/2022]
Abstract
Etiological studies have shown genetic disorders to be a major cause of sensorineural hearing loss, but there are a limited number of comprehensive etiological reports based on genetic analysis. In the present study, the same platform using a diagnostic DNA panel carrying 63 deafness genes and the same filtering algorithm were applied to 10,047 samples obtained from social health insurance-based genetic testing of hearing loss. The most remarkable result obtained in this comprehensive study was that the data first clarified the genetic epidemiology from congenital/early-onset deafness to late-onset hearing loss. The overall diagnostic rate was 38.8%, with the rate differing for each age group; 48.6% for the congenital/early-onset group (~5y.o.), 33.5% for the juvenile/young adult-onset group, and 18.0% for the 40+ y.o. group. Interestingly, each group showed a different kind of causative gene. With regard to the mutational spectra, there are certain recurrent variants that may be due to founder effects or hot spots. A series of haplotype studies have shown many recurrent variants are due to founder effects, which is compatible with human migration. It should be noted that, regardless of differences in the mutational spectrum, the clinical characteristics caused by particular genes can be considered universal. This comprehensive review clarified the detailed clinical characteristics (onset age, severity, progressiveness, etc.) of hearing loss caused by each gene, and will provide useful information for future clinical application, including genetic counseling and selection of appropriate interventions.
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Affiliation(s)
- Shin-Ichi Usami
- Department of Hearing Implant Sciences, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan.
| | - Shin-Ya Nishio
- Department of Hearing Implant Sciences, Shinshu University School of Medicine, 3-1-1 Asahi, Matsumoto, 390-8621, Japan
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Vanniya S P, Chandru J, Jeffrey JM, Rabinowitz T, Brownstein Z, Krishnamoorthy M, Avraham KB, Cheng L, Shomron N, Srisailapathy CRS. PNPT1, MYO15A, PTPRQ, and SLC12A2-associated genetic and phenotypic heterogeneity among hearing impaired assortative mating families in Southern India. Ann Hum Genet 2021; 86:1-13. [PMID: 34374074 DOI: 10.1111/ahg.12442] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2021] [Revised: 07/15/2021] [Accepted: 07/19/2021] [Indexed: 12/24/2022]
Abstract
The study was conducted between 2018 and 2020. From a cohort of 113 hearing impaired (HI), five non-DFNB12 probands identified with heterozygous CDH23 variants were subjected to exome analysis. This resolved the etiology of hearing loss (HL) in four South Indian assortative mating families. Six variants, including three novel ones, were identified in four genes: PNPT1 p.(Ala46Gly) and p.(Asn540Ser), MYO15A p.(Leu1485Pro) and p.(Tyr1891Ter), PTPRQ p.(Gln1336Ter), and SLC12A2 p.(Pro988Ser). Compound heterozygous PNPT1 variants were associated with DFNB70 causing prelingual profound sensorineural hearing loss (SNHL), vestibular dysfunction, and unilateral progressive vision loss in one family. In the second family, MYO15A variants in the myosin motor domain, including a novel variant, causing DFNB3, were found to be associated with prelingual profound SNHL. A novel PTPRQ variant was associated with postlingual progressive sensorineural/mixed HL and vestibular dysfunction in the third family with DFNB84A. In the fourth family, the SLC12A2 novel variant was found to segregate with severe-to-profound HL causing DFNA78, across three generations. Our results suggest a high level of allelic, genotypic, and phenotypic heterogeneity of HL in these families. This study is the first to report the association of PNPT1, PTPRQ, and SLC12A2 variants with HL in the Indian population.
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Affiliation(s)
- Paridhy Vanniya S
- Department of Genetics, Dr. ALM PG Institute of Basic Medical Sciences, University of Madras, Chennai, India
| | - Jayasankaran Chandru
- Department of Genetics, Dr. ALM PG Institute of Basic Medical Sciences, University of Madras, Chennai, India.,LifeBytes India Pvt. Ltd., Bengaluru, India
| | - Justin Margret Jeffrey
- Department of Genetics, Dr. ALM PG Institute of Basic Medical Sciences, University of Madras, Chennai, India
| | - Tom Rabinowitz
- Department of Cell and Developmental Biology, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Zippora Brownstein
- Department of Human Molecular Genetics and Biochemistry, Faculty of Medicine and Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
| | - Mathuravalli Krishnamoorthy
- Department of Genetics, Dr. ALM PG Institute of Basic Medical Sciences, University of Madras, Chennai, India
| | - Karen B Avraham
- Department of Human Molecular Genetics and Biochemistry, Faculty of Medicine and Sagol School of Neuroscience, Tel Aviv University, Tel Aviv, Israel
| | - Le Cheng
- BGI Genomics, Shenzhen, P. R. China
| | - Noam Shomron
- Department of Cell and Developmental Biology, Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - C R Srikumari Srisailapathy
- Department of Genetics, Dr. ALM PG Institute of Basic Medical Sciences, University of Madras, Chennai, India
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6
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Identification of Novel Candidate Genes and Variants for Hearing Loss and Temporal Bone Anomalies. Genes (Basel) 2021; 12:genes12040566. [PMID: 33924653 PMCID: PMC8069784 DOI: 10.3390/genes12040566] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/01/2021] [Accepted: 04/08/2021] [Indexed: 01/09/2023] Open
Abstract
Background: Hearing loss remains an important global health problem that is potentially addressed through early identification of a genetic etiology, which helps to predict outcomes of hearing rehabilitation such as cochlear implantation and also to mitigate the long-term effects of comorbidities. The identification of variants for hearing loss and detailed descriptions of clinical phenotypes in patients from various populations are needed to improve the utility of clinical genetic screening for hearing loss. Methods: Clinical and exome data from 15 children with hearing loss were reviewed. Standard tools for annotating variants were used and rare, putatively deleterious variants were selected from the exome data. Results: In 15 children, 21 rare damaging variants in 17 genes were identified, including: 14 known hearing loss or neurodevelopmental genes, 11 of which had novel variants; and three candidate genes IST1, CBLN3 and GDPD5, two of which were identified in children with both hearing loss and enlarged vestibular aqueducts. Patients with variants within IST1 and MYO18B had poorer outcomes after cochlear implantation. Conclusion: Our findings highlight the importance of identifying novel variants and genes in ethnic groups that are understudied for hearing loss.
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7
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Oziębło D, Sarosiak A, Leja ML, Budde BS, Tacikowska G, Di Donato N, Bolz HJ, Nürnberg P, Skarżyński H, Ołdak M. First confirmatory study on PTPRQ as an autosomal dominant non-syndromic hearing loss gene. J Transl Med 2019; 17:351. [PMID: 31655630 PMCID: PMC6815010 DOI: 10.1186/s12967-019-2099-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Accepted: 10/15/2019] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND Biallelic PTPRQ pathogenic variants have been previously reported as causative for autosomal recessive non-syndromic hearing loss. In 2018 the first heterozygous PTPRQ variant has been implicated in the development of autosomal dominant non-syndromic hearing loss (ADNSHL) in a German family. The study presented the only, so far known, PTPRQ pathogenic variant (c.6881G>A) in ADNSHL. It is located in the last PTPRQ coding exon and introduces a premature stop codon (p.Trp2294*). METHODS A five-generation Polish family with ADNSHL was recruited for the study (n = 14). Thorough audiological, neurotological and imaging studies were carried out to precisely define the phenotype. Genomic DNA was isolated from peripheral blood samples or buccal swabs of available family members. Clinical exome sequencing was conducted for the proband. Family segregation analysis of the identified variants was performed using Sanger sequencing. Single nucleotide polymorphism array on DNA samples from the Polish and the original German family was used for genome-wide linkage analysis. RESULTS Combining clinical exome sequencing and family segregation analysis, we have identified the same (NM_001145026.2:c.6881G>A, NP_001138498.1:p.Trp2294*) PTPRQ alteration in the Polish ADNSHL family. Using genome-wide linkage analysis, we found that the studied family and the original German family derive from a common ancestor. Deep phenotyping of the affected individuals showed that in contrast to the recessive form, the PTPRQ-related ADNSHL is not associated with vestibular dysfunction. In both families ADNSHL was progressive, affected mainly high frequencies and had a variable age of onset. CONCLUSION Our data provide the first confirmation of PTPRQ involvement in ADNSHL. The finding strongly reinforces the inclusion of PTPRQ to the small set of genes leading to both autosomal recessive and dominant hearing loss.
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Affiliation(s)
- Dominika Oziębło
- Department of Genetics, World Hearing Center, Institute of Physiology and Pathology of Hearing, M. Mochnackiego 10, 02-042, Warsaw, Poland.,Postgraduate School of Molecular Medicine, Medical University of Warsaw, Warsaw, Poland
| | - Anna Sarosiak
- Department of Genetics, World Hearing Center, Institute of Physiology and Pathology of Hearing, M. Mochnackiego 10, 02-042, Warsaw, Poland.,Postgraduate School of Molecular Medicine, Medical University of Warsaw, Warsaw, Poland
| | - Marcin L Leja
- Department of Genetics, World Hearing Center, Institute of Physiology and Pathology of Hearing, M. Mochnackiego 10, 02-042, Warsaw, Poland.,Postgraduate School of Molecular Medicine, Medical University of Warsaw, Warsaw, Poland
| | - Birgit S Budde
- Cologne Center for Genomics (CCG), University of Cologne, Cologne, Germany
| | - Grażyna Tacikowska
- Department of Otoneurology, Institute of Physiology and Pathology of Hearing, Warsaw, Poland
| | | | - Hanno J Bolz
- Senckenberg Zentrum für Humangenetik, Frankfurt am Main, Germany
| | - Peter Nürnberg
- Cologne Center for Genomics (CCG), University of Cologne, Cologne, Germany.,Center for Molecular Medicine Cologne (CMMC), University Hospital Cologne, Cologne, Germany
| | - Henryk Skarżyński
- Department of Oto-Rhino-Laryngology Surgery Clinic, Institute of Physiology and Pathology of Hearing, Warsaw, Poland
| | - Monika Ołdak
- Department of Genetics, World Hearing Center, Institute of Physiology and Pathology of Hearing, M. Mochnackiego 10, 02-042, Warsaw, Poland.
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Abstract
PURPOSE OF REVIEW The increased availability of next generation sequencing has enabled a rapid progress in the discovery of genetic variants associated with vestibular disorders. We have summarized molecular genetics finding in vestibular syndromes during the last 18 months. RECENT FINDINGS Genetic studies continue to shed light on the genetic background of vestibular disorders. Novel genes affecting brain development and otolith biogenesis have been associated with motion sickness. Exome sequencing has made possible to identify three rare single nucleotide variants in PRKCB, DPT and SEMA3D linked with familial Meniere disease. Moreover, superior canal dehiscence syndrome might be related with variants in CDH3 gene, by increasing risk of its development. On the other hand, the association between vestibular schwannoma and enlarged vestibular aqueduct with variants in NF2 and SLC26A4, respectively, seems increasingly clear. Finally, the use of mouse models is allowing further progress in the development gene therapy for hearing and vestibular monogenic disorders. SUMMARY Most of episodic or progressive syndromes show familial clustering. A detailed phenotyping with a complete familial history of vestibular symptoms is required to conduct a genetic study. Progress in these studies will allow us to understand diseases mechanisms and improve their current medical treatments.
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Autosomal Recessive Congenital Sensorineural Hearing Loss due to a Novel Compound Heterozygous PTPRQ Mutation in a Chinese Family. Neural Plast 2018; 2018:9425725. [PMID: 29849575 PMCID: PMC5932988 DOI: 10.1155/2018/9425725] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 03/31/2018] [Indexed: 12/05/2022] Open
Abstract
PTPRQ gene, encoding protein tyrosine phosphatase receptor Q, is essential for the normal maturation and function of hair bundle in the cochlea. Its mutations can cause the defects of stereocilia in hair cell, which lead to nonsyndromic sensorineural hearing loss. Using next-generation sequencing and Sanger sequencing method, we identified a novel compound heterozygous missense mutation, c.4472C>T p.T1491M (maternal allele) and c.1973T>C p.V658A (paternal allele), in PTPRQ gene. The two mutations are the first reported to be the cause of recessively inherited sensorineural hearing loss. Hearing loss levels and progression involved by PTPRQ mutations among the existing cases seem to be varied, and the relationship between genotypes and phenotypes is unclear. Our data here further prove the important role of PTPRQ in auditory function and provide more information for the further mechanism research of PTPRQ-related hearing loss.
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Rudman JR, Mei C, Bressler SE, Blanton SH, Liu XZ. Precision medicine in hearing loss. J Genet Genomics 2018; 45:99-109. [PMID: 29500086 DOI: 10.1016/j.jgg.2018.02.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 02/12/2018] [Accepted: 02/12/2018] [Indexed: 11/26/2022]
Abstract
Precision medicine (PM) proposes customized medical care based on a patient's unique genome, biomarkers, environment and behaviors. Hearing loss (HL) is the most common sensorineural disorder worldwide and is frequently caused by a single genetic mutation. With recent advances in PM tools such as genetic sequencing and data analysis, the field of HL is ideally positioned to adopt the strategies of PM. Here, we review current and future applications of PM in HL as they relate to the four core qualities of PM (P4): predictive, personalized, patient-centered, and participatory. We then introduce a strategy for effective incorporation of HL PM into the design of future research studies, electronic medical records, and clinical practice to improve diagnostics, prognostics, and, ultimately, individualized patient treatment. Finally, specific anticipated ethical and economic concerns in this growing era of genomics-based HL treatment are discussed. By integrating PM principles into translational HL research and clinical practice, hearing specialists are uniquely positioned to effectively treat the heterogeneous causes and manifestations of HL on an individualized basis.
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Affiliation(s)
- Jason R Rudman
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Christine Mei
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Sara E Bressler
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Susan H Blanton
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL 33136, USA; Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, FL 33136, USA; John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL 33136, USA
| | - Xue-Zhong Liu
- Department of Otolaryngology, University of Miami Miller School of Medicine, Miami, FL 33136, USA; Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, FL 33136, USA; John P. Hussman Institute for Human Genomics, University of Miami Miller School of Medicine, Miami, FL 33136, USA.
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11
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Talebi F, Ghanbari Mardasi F, Mohammadi Asl J, Tizno S, Najafvand Zadeh M. Identification of Novel PTPRQ and MYO1A Mutations in An Iranian Pedigree with Autosomal Recessive Hearing Loss. CELL JOURNAL 2017; 20:127-131. [PMID: 29308629 PMCID: PMC5759675 DOI: 10.22074/cellj.2018.4805] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2017] [Accepted: 03/12/2017] [Indexed: 12/29/2022]
Abstract
Autosomal recessive non-syndromic hearing loss (ARNSHL) is defined as a genetically heterogeneous disorder. The
aim of the present study was to screen for pathogenic variants in an Iranian pedigree with ARNSHL. Next-generation
targeted sequencing of 127 deafness genes in the proband detected two novel variants, a homozygous missense variant
in PTPRQ (c.2599 T>C, p.Ser867Pro and a heterozygous missense variant in MYO1A (c.2804 T>C, p.Ile935Thr),
both of which were absent in unaffected sibs and two hundred unaffected controls. Our results suggest that the
homozygous PTPRQ variant maybe the pathogenic variant for ARNSHL due to the recessive nature of the disorder.
Nevertheless, the heterozygous MYO1A may also be involved in this disorder due to the multigenic pattern of ARNSHL.
Our data extend the mutation spectrum of PTPRQ and MYO1A, and have important implications for genetic counseling
in unaffected sibs of this family. In addition, PTPRQ and MYO1A pathogenic variants have not to date been reported
in the Iranian population.
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Affiliation(s)
| | | | - Javad Mohammadi Asl
- Department of Medical Genetics, Faculty of Medicine, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Saeed Tizno
- Department of ENT, Faculty of Medicine, Guilan University of Medical Sciences, Guilan, Iran
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12
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Golchin N, Hajjari M, Mohammadi-asl J, Tahmasebi Birgani M. Identification of the mutation p.S867P in the PTPRQ gene in an Iranian family with hearing impairment. Meta Gene 2017. [DOI: 10.1016/j.mgene.2017.04.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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13
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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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Naz S, Imtiaz A, Mujtaba G, Maqsood A, Bashir R, Bukhari I, Khan MR, Ramzan M, Fatima A, Rehman AU, Iqbal M, Chaudhry T, Lund M, Brewer CC, Morell RJ, Friedman TB. Genetic causes of moderate to severe hearing loss point to modifiers. Clin Genet 2016; 91:589-598. [PMID: 27573290 DOI: 10.1111/cge.12856] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Revised: 08/17/2016] [Accepted: 08/22/2016] [Indexed: 11/30/2022]
Abstract
The genetic underpinnings of recessively inherited moderate to severe sensorineural hearing loss are not well understood, despite its higher prevalence in comparison to profound deafness. We recruited 92 consanguineous families segregating stable or progressive, recessively inherited moderate or severe hearing loss. We utilized homozygosity mapping, Sanger sequencing, targeted capture of known deafness genes with massively parallel sequencing and whole exome sequencing to identify the molecular basis of hearing loss in these families. Variants of the known deafness genes were found in 69% of the participating families with the SLC26A4, GJB2, MYO15A, TMC1, TMPRSS3, OTOF, MYO7A and CLDN14 genes together accounting for hearing loss in 54% of the families. We identified 20 reported and 21 novel variants in 21 known deafness genes; 16 of the 20 reported variants, previously associated with stable, profound deafness were associated with moderate to severe or progressive hearing loss in our families. These data point to a prominent role for genetic background, environmental factors or both as modifiers of human hearing loss severity.
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Affiliation(s)
- Sadaf Naz
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - Ayesha Imtiaz
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan.,Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, USA 20892
| | - Ghulam Mujtaba
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - Azra Maqsood
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - Rasheeda Bashir
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - Ihtisham Bukhari
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - Muhammad R Khan
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - Memoona Ramzan
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - Amara Fatima
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - Atteeq U Rehman
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, USA 20892
| | - Muddassar Iqbal
- School of Biological Sciences, University of the Punjab, Lahore, Pakistan
| | - Taimur Chaudhry
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, USA 20892
| | - Merete Lund
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, USA 20892
| | - Carmen C Brewer
- Audiology Unit, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, USA 20892
| | - Robert J Morell
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, USA 20892.,Genomics and Computational Biology Core, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, USA 20892
| | - Thomas B Friedman
- Laboratory of Molecular Genetics, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, USA 20892
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