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Fisch KM, Rosenthal SB, Mark A, Sasik R, Nasamran CA, Clifford R, Derebery MJ, Boussaty E, Jepsen K, Harris J, Friedman RA. The genomic landscape of Ménière's disease: a path to endolymphatic hydrops. BMC Genomics 2024; 25:646. [PMID: 38943082 PMCID: PMC11212243 DOI: 10.1186/s12864-024-10552-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2024] [Accepted: 06/21/2024] [Indexed: 07/01/2024] Open
Abstract
BACKGROUND Ménière's disease (MD) is a disorder of the inner ear that causes episodic bouts of severe dizziness, roaring tinnitus, and fluctuating hearing loss. To date, no targeted therapy exists. As such, we have undertaken a large whole genome sequencing study on carefully phenotyped unilateral MD patients with the goal of gene/pathway discovery and a move towards targeted intervention. This study was a retrospective review of patients with a history of Ménière's disease. Genomic DNA, acquired from saliva samples, was purified and subjected to whole genome sequencing. RESULTS Stringent variant calling, performed on 511 samples passing quality checks, followed by gene-based filtering by recurrence and proximity in molecular interaction networks, led to 481 high priority MD genes. These high priority genes, including MPHOSPH8, MYO18A, TRIOBP, OTOGL, TNC, and MYO6, were previously implicated in hearing loss, balance, and cochlear function, and were significantly enriched in common variant studies of hearing loss. Validation in an independent MD cohort confirmed 82 recurrent genes. Pathway analysis pointed to cell-cell adhesion, extracellular matrix, and cellular energy maintenance as key mediators of MD. Furthermore, the MD-prioritized genes were highly expressed in human inner ear hair cells and dark/vestibular cells, and were differentially expressed in a mouse model of hearing loss. CONCLUSION By enabling the development of model systems that may lead to targeted therapies and MD screening panels, the genes and variants identified in this study will inform diagnosis and treatment of MD.
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Affiliation(s)
- Kathleen M Fisch
- Center for Computational Biology & Bioinformatics, University of California, San Diego, La Jolla, CA, USA.
- Department of Obstetrics, Gynecology & Reproductive Sciences, University of California, San Diego, La Jolla, CA, USA.
| | - Sara Brin Rosenthal
- Center for Computational Biology & Bioinformatics, University of California, San Diego, La Jolla, CA, USA
| | - Adam Mark
- Center for Computational Biology & Bioinformatics, University of California, San Diego, La Jolla, CA, USA
| | - Roman Sasik
- Center for Computational Biology & Bioinformatics, University of California, San Diego, La Jolla, CA, USA
| | - Chanond A Nasamran
- Center for Computational Biology & Bioinformatics, University of California, San Diego, La Jolla, CA, USA
| | - Royce Clifford
- Department of Otolaryngology, Head & Neck Surgery, University of California, San Diego, La Jolla, CA, USA
- Research Department, VA Hospitals, San Diego, CA, USA
| | | | - Ely Boussaty
- Department of Otolaryngology, Head & Neck Surgery, University of California, San Diego, La Jolla, CA, USA
| | - Kristen Jepsen
- Institute for Genomic Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Jeffrey Harris
- Department of Otolaryngology, Head & Neck Surgery, University of California, San Diego, La Jolla, CA, USA
| | - Rick A Friedman
- Department of Otolaryngology, Head & Neck Surgery, University of California, San Diego, La Jolla, CA, USA.
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Alasmari BG, Alpakra M, Hassanien SS, Elmugadam AA, Elzubair L, Suliman EA, Alghubishi SA. A Novel Variant in the DIAPH1 Gene Causing Macrothrombocytopenia and Non-syndromic Hearing Loss in a Pediatric Saudi Girl. Cureus 2024; 16:e61044. [PMID: 38915998 PMCID: PMC11195521 DOI: 10.7759/cureus.61044] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/25/2024] [Indexed: 06/26/2024] Open
Abstract
Macrothrompocytopenia (MTP) is a rare group of hereditary disorders that lead to impaired hemostasis. Macrothrompocytopenia mostly results from genetic mutations in genes implicated in megakaryocyte differentiation and function. Diaphanous-related formin 1 (DIAPH1) is a protein-coding gene. Dominant gain-of-function DIAPH1 variants cause macrothrombocytopenia and sensorineural deafness (autosomal dominant non-syndromic hearing loss 1 (DFNA1)), while homozygous loss of DIAPH1 results in seizures, cortical blindness, and microcephaly syndrome (SCBMS). This rare genetic disease is characterized by progressive and severe hearing loss with onset in the first decade of life, is associated with mild thrombocytopenia, and has no significant bleeding tendency. This case report presents the clinical findings of a 14-year-old Saudi pediatric girl. We investigated the potential association of DIAPH1 as a novel candidate gene linked to dominant MTP and autosomal dominant non-syndromic hearing loss (ADNSHL), which was evaluated through audiometry. Notably, a novel variant, c.3633_3636del, was identified in the DIAPH1 gene. To date, only a small number of mutations in this gene have been reported as the cause of MTP and ADNSHL.
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Affiliation(s)
- Badriah G Alasmari
- Pediatric Hematology and Oncology, Armed Forces Hospitals Southern Region, Khamis Mushayt, SAU
| | - Mohammed Alpakra
- Pediatric Hematology and Oncology, Armed Forces Hospitals Southern Region, Khamis Mushayt, SAU
| | - Sara S Hassanien
- Pediatric Hematology and Oncology, Armed Forces Hospitals Southern Region, Khamis Mushait, SAU
| | - Abdelhakam A Elmugadam
- Pediatric Hematology and Oncology, Armed Forces Hospitals Southern Region, Khamis Mushayt, SAU
| | - Lina Elzubair
- Hematopathology, Armed Forces Hospitals Southern Region, Khamis Mushayt, SAU
| | - Enaam A Suliman
- Hematopathology, Armed Forces Hospitals Southern Region, Khamis Mushayt, SAU
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Chiereghin C, Robusto M, Massa V, Castorina P, Ambrosetti U, Asselta R, Soldà G. Role of Cytoskeletal Diaphanous-Related Formins in Hearing Loss. Cells 2022; 11:cells11111726. [PMID: 35681420 PMCID: PMC9179844 DOI: 10.3390/cells11111726] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2022] [Revised: 05/16/2022] [Accepted: 05/18/2022] [Indexed: 02/04/2023] Open
Abstract
Hearing relies on the proper functioning of auditory hair cells and on actin-based cytoskeletal structures. Diaphanous-related formins (DRFs) are evolutionarily conserved cytoskeletal proteins that regulate the nucleation of linear unbranched actin filaments. They play key roles during metazoan development, and they seem particularly pivotal for the correct physiology of the reproductive and auditory systems. Indeed, in Drosophila melanogaster, a single diaphanous (dia) gene is present, and mutants show sterility and impaired response to sound. Vertebrates, instead, have three orthologs of the diaphanous gene: DIAPH1, DIAPH2, and DIAPH3. In humans, defects in DIAPH1 and DIAPH3 have been associated with different types of hearing loss. In particular, heterozygous mutations in DIAPH1 are responsible for autosomal dominant deafness with or without thrombocytopenia (DFNA1, MIM #124900), whereas regulatory mutations inducing the overexpression of DIAPH3 cause autosomal dominant auditory neuropathy 1 (AUNA1, MIM #609129). Here, we provide an overview of the expression and function of DRFs in normal hearing and deafness.
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Affiliation(s)
- Chiara Chiereghin
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Milan, Italy; (C.C.); (R.A.)
| | - Michela Robusto
- Experimental Therapeutics Program, IFOM ETS—The AIRC Institute of Molecular Oncology, Via Adamello 16, 20139 Milan, Italy;
| | - Valentina Massa
- Dipartimento di Scienze della Salute, Università degli Studi di Milano, Via Di Rudinì 8, 20146 Milan, Italy;
| | | | - Umberto Ambrosetti
- Dipartimento di Scienze Cliniche e di Comunità, Università degli Studi di Milano and Fondazione IRCCS Cà Granda Ospedale Maggiore Policlinico, UO Audiologia, Via F. Sforza 35, 20122 Milan, Italy;
| | - Rosanna Asselta
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Milan, Italy; (C.C.); (R.A.)
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20072 Milan, Italy
| | - Giulia Soldà
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Milan, Italy; (C.C.); (R.A.)
- Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20072 Milan, Italy
- Correspondence:
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