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Mohseni-Dargah M, Falahati Z, Pastras C, Khajeh K, Mukherjee P, Razmjou A, Stefani S, Asadnia M. Meniere's disease: Pathogenesis, treatments, and emerging approaches for an idiopathic bioenvironmental disorder. ENVIRONMENTAL RESEARCH 2023; 238:116972. [PMID: 37648189 DOI: 10.1016/j.envres.2023.116972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/04/2023] [Revised: 08/10/2023] [Accepted: 08/22/2023] [Indexed: 09/01/2023]
Abstract
Meniere's disease (MD) is a severe inner ear condition known by debilitating symptoms, including spontaneous vertigo, fluctuating and progressive hearing loss, tinnitus, and aural fullness or pressure within the affected ear. Prosper Meniere first described the origins of MD in the 1860s, but its underlying mechanisms remain largely elusive today. Nevertheless, researchers have identified a key histopathological feature called Endolymphatic Hydrops (ELH), which refers to the excessive buildup of endolymph fluid in the membranous labyrinth of the inner ear. The exact root of ELH is not fully understood. Still, it is believed to involve several biological and bioenvironmental etiological factors such as genetics, autoimmunity, infection, trauma, allergy, and new theories, such as saccular otoconia blocking the endolymphatic duct and sac. Regarding treatment, there are no reliable and definitive cures for MD. Most therapies focus on managing symptoms and improving the overall quality of patients' life. To make significant advancements in addressing MD, it is crucial to gain a fundamental understanding of the disease process, laying the groundwork for more effective therapeutic approaches. This paper provides a comprehensive review of the pathophysiology of MD with a focus on old and recent theories. Current treatment strategies and future translational approaches (with low-level evidence but promising results) related to MD are also discussed, including patents, drug delivery, and nanotechnology, that may provide future benefits to patients suffering from MD.
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Affiliation(s)
- Masoud Mohseni-Dargah
- School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, NSW 2109, Australia; Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Zahra Falahati
- Department of Biological Sciences, Institute for Advanced Studies in Basic Sciences (IASBS), Zanjan, Iran
| | - Christopher Pastras
- School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, NSW 2109, Australia; The Meniere's Laboratory, Sydney Medical School, The University of Sydney, Sydney, NSW, Australia
| | - Khosro Khajeh
- Department of Biochemistry, Faculty of Biological Sciences, Tarbiat Modares University, Tehran, Iran
| | - Payal Mukherjee
- RPA Institute of Academic Surgery, Royal Prince Alfred Hospital, Sydney, New South Wales, Australia
| | - Amir Razmjou
- Centre for Technology in Water and Wastewater, University of Technology Sydney, New South Wales 2007, Australia
| | - Sebastian Stefani
- School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, NSW 2109, Australia
| | - Mohsen Asadnia
- School of Engineering, Faculty of Science and Engineering, Macquarie University, Sydney, NSW 2109, Australia.
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Babu V, Bahari R, Laban N, Kulaga J, Abdul Z, Zakkar B, Al-Najjar A, Lesus J, Al-Rifai AAR, Sattar H, Irukulla S, Gunniya P, Requena T, Lysakowski A. RotaRod and acoustic startle reflex performance of two potential mouse models for Meniere's disease. Eur J Neurosci 2023; 58:2708-2723. [PMID: 37461313 DOI: 10.1111/ejn.16083] [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: 01/26/2023] [Revised: 06/11/2023] [Accepted: 06/17/2023] [Indexed: 08/04/2023]
Abstract
Meniere's disease (MD) is a disorder of the inner ear characterized by chronic episodes of vertigo, tinnitus, increased aural pressure, and sensorineural hearing loss. Causes of MD are unknown, but endolymphatic hydrops is a hallmark. In addition, 5%-15% of MD cases have been identified as familial. Whole-genome sequencing studies of individuals with familial MD identified DTNA and FAM136A as candidate genes for autosomal dominant inheritance of MD. Although the exact roles of these genes in MD are unknown, FAM136A encodes a mitochondrial protein, and DTNA encodes a cytoskeletal protein involved in synapse formation and maintenance, important for maintaining the blood-brain barrier. It is also associated with a particular aquaporin. We tested vestibular and auditory function in dtna and fam136a knockout (KO) mice, using RotaRod and startle reflex-based clicker tests, respectively. Three-factor analysis of variance (ANOVA) results indicated that sex, age, and genotype were significantly correlated with reduced mean latencies to fall ("latencies") for male dtna KO mice, while only age was a significant factor for fam136a KO mice. Fam136a KO mice lost their hearing months before WTs (9-11 months vs. 15-20 months). In male dtna KO mice, divergence in mean latencies compared with other genotypes was first evident at 4 months of age, with older males having an even greater decrease. Our results indicate that fam136a gene mutations generate hearing problems, while dtna gene mutations produce balance deficits. Both mouse models should help to elucidate hearing loss and balance-related symptoms associated with MD.
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Affiliation(s)
- Vidya Babu
- University of Illinois at Chicago College of Medicine, Chicago, Illinois, USA
| | - Rose Bahari
- University of Illinois at Chicago College of Medicine, Chicago, Illinois, USA
| | - Nora Laban
- University of Illinois at Chicago College of Medicine, Chicago, Illinois, USA
| | - Jacob Kulaga
- University of Illinois at Chicago College of Medicine, Chicago, Illinois, USA
| | - Zahid Abdul
- University of Illinois at Chicago College of Medicine, Chicago, Illinois, USA
| | - Basil Zakkar
- University of Illinois at Chicago College of Medicine, Chicago, Illinois, USA
| | - Ahmad Al-Najjar
- University of Illinois at Chicago College of Medicine, Chicago, Illinois, USA
| | - Joseph Lesus
- University of Illinois at Chicago College of Medicine, Chicago, Illinois, USA
| | | | - Heba Sattar
- University of Illinois at Chicago College of Medicine, Chicago, Illinois, USA
| | - Suhitha Irukulla
- University of Illinois at Chicago College of Medicine, Chicago, Illinois, USA
| | - Pranav Gunniya
- University of Illinois at Chicago College of Medicine, Chicago, Illinois, USA
| | - Teresa Requena
- Roslin Institute, University of Edinburgh, Edinburgh, UK
| | - Anna Lysakowski
- University of Illinois at Chicago College of Medicine, Chicago, Illinois, USA
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Zou J, Zhang G, Li H, Zhao Z, Zhang Q, Pyykkö I, Mäkitie A. Multiple genetic variants involved in both autoimmunity and autoinflammation detected in Chinese patients with sporadic Meniere's disease: a preliminary study. Front Neurol 2023; 14:1159658. [PMID: 37273692 PMCID: PMC10232973 DOI: 10.3389/fneur.2023.1159658] [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: 02/06/2023] [Accepted: 04/20/2023] [Indexed: 06/06/2023] Open
Abstract
Background The mechanisms of Meniere's disease (MD) remain largely unknown. The purpose of this study was to identify possible genetic variants associated with immune regulation in MD. Methods The whole immune genome of 16 Chinese patients diagnosed with sporadic MD was sequenced using next-generation sequencing. Results Definite pathological variants of MEFV (c.1223G>A, c.1105C>T), COL7A1 (c.5287C>T), and ADA (c.445C>T) contributing to the clinical phenotype were found in three patients. Limited and likely pathological variants of TLR3 (c.2228G>A) and RAB27A (c.560G>A) were detected in one patient each. The following definite pathological variants impairing the structure and function of translated proteins were detected in 10 patients, and multigene variants occurred in five patients: PRF1 (c.710C>A), UNC13D (c.1228A>C), COLEC11 (c.169C>T), RAG2 (c.200G>C), BLM (c.1937G>T), RNF31 (c.2533G>A), FAT4 (c.11498A>G), PEPD (c.788A>G), TNFSF12 (c.470G>A), VPS13B (c.11972A>T), TNFRSF13B (c.226G>A), ERCC6L2 (c.4613A>G), TLR3 (c.2228G>A), ADA (c.445C>T), PEPD (c.151G>A), and MOGS (c.2470G>A). The following limited pathological variants impairing the structure and function of translated proteins were detected in five patients, with double gene variants identified in one patient: EXTL3 (c.1396G>A), MTHFD1 (c.2057G>A), FANCA (c.2039T>C), LPIN2 (c.1814C>T), NBAS (c.4049T>C), and FCN3 (c.734G>A). Conclusion Patients with sporadic MD carry multiple genetic variants involved in multiple steps of immune regulation, which might render patients susceptible to developing inflammation via both autoimmune and autoinflammation mechanisms upon internal stress.
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Affiliation(s)
- Jing Zou
- Department of Otolaryngology-Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai, China
- Research Program in Systems Oncology, Department of Otorhinolaryngology-Head and Neck Surgery, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
| | - Guoping Zhang
- Department of Otolaryngology-Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Hongbin Li
- Department of Otolaryngology-Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Zikai Zhao
- Department of Otolaryngology-Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Qing Zhang
- Department of Otolaryngology-Head and Neck Surgery, Changhai Hospital, Second Military Medical University, Shanghai, China
| | - Ilmari Pyykkö
- Hearing and Balance Research Unit, Field of Otolaryngology, School of Medicine, Faculty of Medicine and Health Technology, Tampere University, Tampere, Finland
| | - Antti Mäkitie
- Research Program in Systems Oncology, Department of Otorhinolaryngology-Head and Neck Surgery, Helsinki University Hospital and University of Helsinki, Helsinki, Finland
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Genetic advances in Meniere Disease. Mol Biol Rep 2023; 50:2901-2908. [PMID: 36565421 PMCID: PMC10011279 DOI: 10.1007/s11033-022-08149-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Accepted: 11/22/2022] [Indexed: 12/25/2022]
Abstract
Meniere Disease (MD) is an idiopathic inner ear disease with complex etiology and pathogenesis, which is still unclear. With the development in gene analysis technology, the genetic research of MD has attracted extensive attention, resulting in a large number of studies on the research of the relationship between human genes and MD. This paper aims to review the studies on this topic in recent years. The studies mainly focused on the genetics of familial MD and the correlation between MD and potentially related functional genes. The results of these studies have demonstrated the complexity and diversity of the pathogenesis of MD with both genetic and epigenetic alterations, suggesting that MD might be related to inflammation, immunity, aqua and ion balance in the lymphatic fluid, virus infection, metabolism, and abnormal function of nerve conduction. The finding of rare mutations in TECTA, MYO7A and OTOG genes and other genes such as CDH23, PCDH15 and ADGRV1 in the same families suggest that the integrity of the stereocilia and their interaction with the tectorial and otolithic membranes could be involved in the pathophysiology of familial MD.
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Thompson-Harvey A, Friedland DR, Adams JA, Tong L, Osinski K, Luo J. The Demographics of Menière's Disease: Selection Bias or Differential Susceptibility? Otol Neurotol 2023; 44:e95-e102. [PMID: 36477093 PMCID: PMC9839510 DOI: 10.1097/mao.0000000000003780] [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] [Indexed: 12/13/2022]
Abstract
OBJECTIVE To clarify whether the reported lack of racial and ethnic diversity among Menière's disease (MD) patients is representative of selection bias or disease susceptibility. STUDY DESIGN Retrospective medical record review and population-level analyses. SETTING Tertiary referral center. PATIENTS Cohort of 1091 patients diagnosed with MD by the tertiary otology service. MAIN OUTCOME MEASURE Demographic and population-level characteristics (age, sex, race, insurance status, ZIP code, median income, education level) compared with local, regional, health system, and otolaryngology clinic demographics. RESULTS Patients seen for MD were significantly older than those seen throughout the otolaryngology clinic (median, 65.0 versus 58.8 yr) or health system (65.0 versus 50.8 yr). A majority of patients with MD were of White race (92%), compared with 2.7% Black race and 0.5% Asian. Using population-level data, median income and having medical insurance were significantly correlated with care for MD. A disproportionate rate of care for MD was seen in ZIP codes outside urban areas as compared with other otologic and otolaryngologic conditions seen in the same clinic. CONCLUSION Patients with MD are of older age, more likely to be of White race, and disproportionately from rural locales. The demographic profile of patients diagnosed with MD by tertiary otology is better explained by differential susceptibility to MD than by selection bias.
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Affiliation(s)
- Adam Thompson-Harvey
- Department of Otolaryngology and Communication Sciences, Medical College of Wisconsin
| | - David R. Friedland
- Department of Otolaryngology and Communication Sciences, Medical College of Wisconsin
| | - Jazzmyne A. Adams
- Department of Otolaryngology and Communication Sciences, Medical College of Wisconsin
| | - Ling Tong
- Department of Health Informatics and Administration, University of Wisconsin – Milwaukee
| | - Kristen Osinski
- Clinical and Translational Science Institute, Medical College of Wisconsin
| | - Jake Luo
- Department of Health Informatics and Administration, University of Wisconsin – Milwaukee
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Requena T, Keder A, zur Lage P, Albert JT, Jarman AP. A Drosophila model for Meniere's disease: Dystrobrevin is required for support cell function in hearing and proprioception. Front Cell Dev Biol 2022; 10:1015651. [PMID: 36438562 PMCID: PMC9688402 DOI: 10.3389/fcell.2022.1015651] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2022] [Accepted: 10/27/2022] [Indexed: 08/04/2023] Open
Abstract
Meniere's disease (MD) is an inner ear disorder characterised by recurrent vertigo attacks associated with sensorineural hearing loss and tinnitus. Evidence from epidemiology and Whole Exome Sequencing (WES) suggests a genetic susceptibility involving multiple genes, including α-Dystrobrevin (DTNA). Here we investigate a Drosophila model. We show that mutation, or knockdown, of the DTNA orthologue in Drosophila, Dystrobrevin (Dyb), results in defective proprioception and impaired function of Johnston's Organ (JO), the fly's equivalent of the inner ear. Dyb and another component of the dystrophin-glycoprotein complex (DGC), Dystrophin (Dys), are expressed in support cells within JO. Their specific locations suggest that they form part of support cell contacts, thereby helping to maintain the integrity of the hemolymph-neuron diffusion barrier, which is equivalent to a blood-brain barrier. These results have important implications for the human condition, and notably, we note that DTNA is expressed in equivalent cells of the mammalian inner ear.
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Affiliation(s)
- T. Requena
- Biomedical Sciences: Centre for Discovery Brain Sciences, Edinburgh Medical School, University of Edinburgh, Edinburgh, United Kingdom
- Division of Functional Genetics and Development, The Royal Dick School of Veterinary Sciences, The Roslin Institute, The University of Edinburgh, Edinburgh, United Kingdom
| | - A. Keder
- Ear Institute, University College London, London, United Kingdom
| | - P. zur Lage
- Biomedical Sciences: Centre for Discovery Brain Sciences, Edinburgh Medical School, University of Edinburgh, Edinburgh, United Kingdom
| | - J. T. Albert
- Ear Institute, University College London, London, United Kingdom
| | - A. P. Jarman
- Biomedical Sciences: Centre for Discovery Brain Sciences, Edinburgh Medical School, University of Edinburgh, Edinburgh, United Kingdom
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Robles-Bolivar P, Bächinger D, Parra-Perez AM, Román-Naranjo P, Escalera-Balsera A, Gallego-Martinez A, Eckhard AH, Lopez-Escamez JA. A novel nonsense variant in the CENPP gene segregates in a Swiss family with autosomal dominant low-frequency sensorineural hearing loss. Eur J Hum Genet 2022; 30:1301-1305. [PMID: 36071244 PMCID: PMC9626507 DOI: 10.1038/s41431-022-01184-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2022] [Revised: 08/19/2022] [Accepted: 08/25/2022] [Indexed: 02/04/2023] Open
Abstract
Low-frequency sensorineural hearing loss (SNHL) is a rare hearing impairment affecting frequencies below 1000 Hz, previously associated with DIAPH1, WSF1, MYO7A, TNC, SLC26A4 or CCDC50 genes. By exome sequencing, we report a novel nonsense variant in CENPP gene, segregating low-frequency SNHL in five affected members in a Swiss family with autosomal dominant inheritance pattern. Audiological evaluation showed up-sloping audiometric configuration with mild-to-moderate losses below 1000 Hz, that progresses to high-frequencies over time. Protein modeling shows that the variant truncates five amino acids at the end, losing electrostatic interactions that alter protein stability. CENPP gene is expressed in the supporting cells of the organ of Corti and takes part as a subunit of the Constitutive Centromere Associated Network in the kinetochore, that fixes the centromere to the spindle microtubules. We report CENPP as a new candidate gene for low-frequency SNHL. Further functional characterization might enable us to elucidate its molecular role in SNHL.
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Affiliation(s)
- Paula Robles-Bolivar
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, GENYO, Centre for Genomics and Oncological Research: Pfizer/University of Granada/Andalusian Regional Government, PTS Granada, Avenida de la Ilustración, 114, 18016, Granada, Spain
- Sensorineural Pathology Programme, Centro de Investigación Biomédica en Red en Enfermedades Raras, CIBERER, 28029, Madrid, Spain
- Department of Otolaryngology, Instituto de Investigación Biosanitaria ibs, Granada, Hospital Universitario Virgen de las Nieves, Universidad de Granada, 18014, Granada, Spain
| | - David Bächinger
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Alberto M Parra-Perez
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, GENYO, Centre for Genomics and Oncological Research: Pfizer/University of Granada/Andalusian Regional Government, PTS Granada, Avenida de la Ilustración, 114, 18016, Granada, Spain
- Sensorineural Pathology Programme, Centro de Investigación Biomédica en Red en Enfermedades Raras, CIBERER, 28029, Madrid, Spain
- Department of Otolaryngology, Instituto de Investigación Biosanitaria ibs, Granada, Hospital Universitario Virgen de las Nieves, Universidad de Granada, 18014, Granada, Spain
- Division of Otolaryngology, Department of Surgery, University of Granada, 18011, Granada, Spain
| | - Pablo Román-Naranjo
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, GENYO, Centre for Genomics and Oncological Research: Pfizer/University of Granada/Andalusian Regional Government, PTS Granada, Avenida de la Ilustración, 114, 18016, Granada, Spain
- Sensorineural Pathology Programme, Centro de Investigación Biomédica en Red en Enfermedades Raras, CIBERER, 28029, Madrid, Spain
- Department of Otolaryngology, Instituto de Investigación Biosanitaria ibs, Granada, Hospital Universitario Virgen de las Nieves, Universidad de Granada, 18014, Granada, Spain
- Division of Otolaryngology, Department of Surgery, University of Granada, 18011, Granada, Spain
| | - Alba Escalera-Balsera
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, GENYO, Centre for Genomics and Oncological Research: Pfizer/University of Granada/Andalusian Regional Government, PTS Granada, Avenida de la Ilustración, 114, 18016, Granada, Spain
- Sensorineural Pathology Programme, Centro de Investigación Biomédica en Red en Enfermedades Raras, CIBERER, 28029, Madrid, Spain
- Department of Otolaryngology, Instituto de Investigación Biosanitaria ibs, Granada, Hospital Universitario Virgen de las Nieves, Universidad de Granada, 18014, Granada, Spain
| | - Alvaro Gallego-Martinez
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, GENYO, Centre for Genomics and Oncological Research: Pfizer/University of Granada/Andalusian Regional Government, PTS Granada, Avenida de la Ilustración, 114, 18016, Granada, Spain
- Sensorineural Pathology Programme, Centro de Investigación Biomédica en Red en Enfermedades Raras, CIBERER, 28029, Madrid, Spain
- Department of Otolaryngology, Instituto de Investigación Biosanitaria ibs, Granada, Hospital Universitario Virgen de las Nieves, Universidad de Granada, 18014, Granada, Spain
| | - Andreas H Eckhard
- Department of Otorhinolaryngology, Head and Neck Surgery, University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Jose A Lopez-Escamez
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, GENYO, Centre for Genomics and Oncological Research: Pfizer/University of Granada/Andalusian Regional Government, PTS Granada, Avenida de la Ilustración, 114, 18016, Granada, Spain.
- Sensorineural Pathology Programme, Centro de Investigación Biomédica en Red en Enfermedades Raras, CIBERER, 28029, Madrid, Spain.
- Department of Otolaryngology, Instituto de Investigación Biosanitaria ibs, Granada, Hospital Universitario Virgen de las Nieves, Universidad de Granada, 18014, Granada, Spain.
- Division of Otolaryngology, Department of Surgery, University of Granada, 18011, Granada, Spain.
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Niu Y, Chen W, Lin M, Sha Y. Development and Characteristics of Hearing Loss With the Progression of Endolymphatic Hydrops. EAR, NOSE & THROAT JOURNAL 2022:1455613221101088. [PMID: 35856637 DOI: 10.1177/01455613221101088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVES This study aims to explore how patients' hearing loss developed with the progression of endolymphatic hydrops and the characteristics of hearing loss at different stages. MATERIALS AND METHODS We collected 73 patients with definite or possible unilateral Meniere's disease or sudden hearing loss who underwent magnetic resonance imaging after intravenous contrast agent injection. There were 25 cases of isolated cochlear hydrops, 24 cases of isolated vestibular hydrops, and 24 cases of cochlear and vestibular hydrops. Primary outcome analyses included their evaluation of endolymphatic hydrops and hearing thresholds at low and high frequencies. RESULTS The overall hearing threshold of patients with vestibular and cochlear hydrops was significantly higher than that of patients with isolated cochlear hydrops and patients with isolated vestibular hydrops. There was a significant correlation between low-frequency hearing loss and cochlear hydrops, and the low-frequency hearing threshold was proportional to the grade of cochlear hydrops. At low frequency, the hearing threshold of patients with isolated vestibular hydrops was lower than that of patients with isolated cochlear hydrops and patients with both cochlear and vestibular hydrops. The audiogram configurations of patients with isolated cochlear hydrops consist largely of flat type and up-sloping type. The audiogram configurations of patients with isolated vestibular hydrops and patients with both cochlear and vestibular hydrops are mainly flat type and down-sloping type. CONCLUSIONS Patients present with low-frequency hearing loss in the early stage of endolymphatic hydrops. When the hydrops involves the whole cochlea and vestibule, the patients' hearing is impaired at both low and high frequencies.
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Affiliation(s)
- Yue Niu
- Eye, Ear, Nose and Throat (EENT) Hospital of Fudan University, Shanghai, China
| | - Wei Chen
- Shanghai Institute of Medical Imaging, Fudan University, Shanghai, China
| | - Mengyan Lin
- Shanghai Institute of Medical Imaging, Fudan University, Shanghai, China
| | - Yan Sha
- Eye, Ear, Nose and Throat (EENT) Hospital of Fudan University, Shanghai, China
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Choi KD, Oh EH, Kim HS, Kim HS, Park JY, Choi SY, Choi JH. Transcriptional Down-Regulation of Major Histocompatibility Complex as a Possible Pathogenesis for Meniere's Disease. Front Neurol 2022; 13:938740. [PMID: 35923832 PMCID: PMC9339969 DOI: 10.3389/fneur.2022.938740] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Accepted: 06/20/2022] [Indexed: 12/13/2022] Open
Abstract
Objectives This study aimed to determine the underlying pathogenesis of Meniere's disease (MD) using transcriptome analysis. Methods Total RNA was extracted from the peripheral blood mononuclear cells of 39 patients with MD and 39 controls. Through microarray analysis for nine patients and controls, the differentially expressed genes (DEGs) of those two groups were screened based on cut-off criteria (|fold changes| > 2.0 and adjusted p-value < 0.05). The functional enrichment analysis of DEGs was performed using Gene Ontology (GO). Results There were 996 DEGs identified in the MD group: 415 were upregulated and 581 were downregulated. A functional enrichment analysis indicated that the downregulated DEGs were significantly enriched in terms related to immune system processes. Among them, 17 genes were enriched in terms for the major histocompatibility complex (MHC) protein complex, and the relative messenger RNA (mRNA) levels of three markedly downregulated DEGs [fold changes < −5: human leukocyte antigen (HLA)-DMA, HLA-DRB1, and HLA-DPB1] were significantly decreased in another 30 patients with MD compared with normal controls by quantitative reverse transcription-polymerase chain reaction (qRT-PCR). However, there were no correlations between the expression levels of these three genes and clinical data, such as age, onset age, time course, or hearing threshold. Conclusions Our transcriptome analysis showed that the downregulated DEGs in MD were mainly associated with the immune system pathways including the MHC protein complex in MD. Remarkably, a breakdown in immunological tolerance mediated by MHC class II may contribute to the MD development, which has implications for targeted treatment.
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Affiliation(s)
- Kwang-Dong Choi
- Department of Neurology, Pusan National University Hospital, Pusan National University School of Medicine and Biomedical Research Institute, Busan, South Korea
| | - Eun Hye Oh
- Department of Neurology, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Hyun Sung Kim
- Department of Neurology, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Hyang-Sook Kim
- Department of Neurology, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Ji-Yun Park
- Department of Neurology, Ulsan University Hospital, University of Ulsan College of Medicine, Ulsan, South Korea
| | - Seo Young Choi
- Department of Neurology, Pusan National University Hospital, Pusan National University School of Medicine and Biomedical Research Institute, Busan, South Korea
| | - Jae-Hwan Choi
- Department of Neurology, Pusan National University School of Medicine, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University Yangsan Hospital, Yangsan, South Korea
- *Correspondence: Jae-Hwan Choi
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New Genetic Variants in CYP2B6 and SLC6A Support the Role of Oxidative Stress in Familial Ménière’s Disease. Genes (Basel) 2022; 13:genes13060998. [PMID: 35741759 PMCID: PMC9222295 DOI: 10.3390/genes13060998] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2022] [Revised: 05/23/2022] [Accepted: 05/30/2022] [Indexed: 12/10/2022] Open
Abstract
The objective was to study the genetic etiology of Ménière’s disease (MD) using next-generation sequencing in three families with three cases of MD. Whole exome sequencing was used to identify rare genetic variants co-segregating with MD in Finnish families. In silico estimations and population databases were used to estimate the frequency and pathogenicity of the variants. Variants were validated and genotyped from additional family members using capillary sequencing. A geneMANIA analysis was conducted to investigate the functional pathways and protein interactions of candidate genes. Seven rare variants were identified to co-segregate with MD in the three families: one variant in the CYP2B6 gene in family I, one variant in GUSB and EPB42 in family II, and one variant in each of the SLC6A, ASPM, KNTC1, and OVCH1 genes in family III. Four of these genes were linked to the same co-expression network with previous familial MD candidate genes. Dysfunction of CYP2B6 and SLC6A could predispose to MD via the oxidative stress pathway. Identification of ASPM and KNTC1 as candidate genes for MD suggests dysregulation of mitotic spindle formation in familial MD. The genetic etiology of familial MD is heterogenic. Our findings suggest a role for genes acting on oxidative stress and mitotic spindle formation in MD but also highlight the genetic complexity of MD.
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Zhang S, Guo Z, Tian E, Liu D, Wang J, Kong W. Meniere disease subtyping: the direction of diagnosis and treatment in the future. Expert Rev Neurother 2022; 22:115-127. [PMID: 35057670 DOI: 10.1080/14737175.2022.2030221] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Affiliation(s)
- Sulin Zhang
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
- Institute of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
| | - Zhaoqi Guo
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
| | - E Tian
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
| | - Dan Liu
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
| | - Jun Wang
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
| | - Weijia Kong
- Department of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
- Institute of Otorhinolaryngology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
- Key Laboratory of Neurological Disorders of Education Ministry, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, Hubei, China
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A Family with a High Incidence of Migraine and Vestibular Migraine and a Case of Menière's Disease. Case Rep Med 2021; 2021:9984047. [PMID: 34512765 PMCID: PMC8433000 DOI: 10.1155/2021/9984047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Accepted: 08/19/2021] [Indexed: 11/22/2022] Open
Abstract
Vestibular migraine (VM) and Menière's disease (MD) are common neurotological disorders causing episodic vertigo. Sometimes, VM is accompanied by cochlear symptoms suggestive for MD. Therefore, in those cases, the differential diagnosis between the two disorders can be difficult. Moreover, a comorbidity with migraine in MD patients is widely reported, up to the hypothesis of a possible MD-VM overlapping syndrome. In this brief case report, we consider the clinical history of a family presenting high incidence of subjects fulfilling the diagnostic criteria of VM and single case fulfilling criteria for definite MD. The relationship between VM and MD is still under debate; anyway, it can be speculated that commonly shared genetic mutations could play a role as predisposing factors in both disorders. A congenital nystagmus in the family was present too, but its correlation with the other conditions is still not clear. Future goal of our work will be to assess genetics in this family.
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Asgarbeik S, Vahidi A, Yazdani N, Tajdini A, Amoli MM. VEGFA gene haplotypes in Meniere's disease. GENE REPORTS 2021. [DOI: 10.1016/j.genrep.2021.101244] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Roman-Naranjo P, Gallego-Martinez A, Soto-Varela A, Aran I, Moleon MDC, Espinosa-Sanchez JM, Amor-Dorado JC, Batuecas-Caletrio A, Perez-Vazquez P, Lopez-Escamez JA. Burden of Rare Variants in the OTOG Gene in Familial Meniere's Disease. Ear Hear 2021; 41:1598-1605. [PMID: 33136635 DOI: 10.1097/aud.0000000000000878] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
OBJECTIVES Meniere's disease (MD) is a rare inner ear disorder characterized by sensorineural hearing loss, episodic vertigo, and tinnitus. Familial MD has been reported in 6 to 9% of sporadic cases, and few genes including FAM136A, DTNA, PRKCB, SEMA3D, and DPT have been involved in single families, suggesting genetic heterogeneity. In this study, the authors recruited 46 families with MD to search for relevant candidate genes for hearing loss in familial MD. DESIGN Exome sequencing data from MD patients were analyzed to search for rare variants in hearing loss genes in a case-control study. A total of 109 patients with MD (73 familial cases and 36 early-onset sporadic patients) diagnosed according to the diagnostic criteria defined by the Barany Society were recruited in 11 hospitals. The allelic frequencies of rare variants in hearing loss genes were calculated in individuals with familial MD. A single rare variant analysis and a gene burden analysis (GBA) were conducted in the dataset selecting 1 patient from each family. Allelic frequencies from European and Spanish reference datasets were used as controls. RESULTS A total of 5136 single-nucleotide variants in hearing loss genes were considered for single rare variant analysis in familial MD cases, but only 1 heterozygous likely pathogenic variant in the OTOG gene (rs552304627) was found in 2 unrelated families. The gene burden analysis found an enrichment of rare missense variants in the OTOG gene in familial MD. So, 15 of 46 families (33%) showed at least 1 rare missense variant in the OTOG gene, suggesting a key role in familial MD. CONCLUSIONS The authors found an enrichment of multiplex rare missense variants in the OTOG gene in familial MD. This finding supports OTOG as a relevant gene in familial MD and set the groundwork for genetic testing in MD.
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Affiliation(s)
- Pablo Roman-Naranjo
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, Centro Pfizer-Universidad de Granada-Junta de Andalucía de Genómica e Investigación Oncológica, Granada, Spain
| | - Alvaro Gallego-Martinez
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, Centro Pfizer-Universidad de Granada-Junta de Andalucía de Genómica e Investigación Oncológica, Granada, Spain
| | - Andrés Soto-Varela
- Division of Otoneurology, Department of Otorhinolaryngology, Complexo Hospitalario Universitario, Santiago de Compostela, Spain
| | - Ismael Aran
- Department of Otolaryngology, Complexo Hospitalario de Pontevedra, Pontevedra, Spain
| | - Maria Del Carmen Moleon
- Department of Otolaryngology, Instituto de Investigación Biosanitaria, ibs.GRANADA, Hospital Universitario Virgen de las Nieves, Granada, Spain
| | - Juan Manuel Espinosa-Sanchez
- Department of Otolaryngology, Instituto de Investigación Biosanitaria, ibs.GRANADA, Hospital Universitario Virgen de las Nieves, Granada, Spain
| | | | - Angel Batuecas-Caletrio
- Department of Otolaryngology, Hospital Universitario Salamanca, Instituto de Investigación Biomédica de Salamanca (IBSAL), Salamanca, Spain
| | - Paz Perez-Vazquez
- Department of Otorhinolaryngology, Hospital Universitario de Cabueñes, Gijón, Spain
| | - Jose Antonio Lopez-Escamez
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, Centro Pfizer-Universidad de Granada-Junta de Andalucía de Genómica e Investigación Oncológica, Granada, Spain
- Department of Otolaryngology, Instituto de Investigación Biosanitaria, ibs.GRANADA, Hospital Universitario Virgen de las Nieves, Granada, Spain
- Department of Surgery, Division of Otolaryngology, Universidad de Granada, Granada, Spain
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Mei C, Dong H, Nisenbaum E, Thielhelm T, Nourbakhsh A, Yan D, Smeal M, Lundberg Y, Hoffer ME, Angeli S, Telischi F, Nie G, Blanton SH, Liu X. Genetics and the Individualized Therapy of Vestibular Disorders. Front Neurol 2021; 12:633207. [PMID: 33613440 PMCID: PMC7892966 DOI: 10.3389/fneur.2021.633207] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 01/13/2021] [Indexed: 02/06/2023] Open
Abstract
Background: Vestibular disorders (VDs) are a clinically divergent group of conditions that stem from pathology at the level of the inner ear, vestibulocochlear nerve, or central vestibular pathway. No etiology can be identified in the majority of patients with VDs. Relatively few families have been reported with VD, and so far, no causative genes have been identified despite the fact that more than 100 genes have been identified for inherited hearing loss. Inherited VDs, similar to deafness, are genetically heterogeneous and follow Mendelian inheritance patterns with all modes of transmission, as well as multifactorial inheritance. With advances in genetic sequencing, evidence of familial clustering in VD has begun to highlight the genetic causes of these disorders, potentially opening up new avenues of treatment, particularly in Meniere's disease and disorders with comorbid hearing loss, such as Usher syndrome. In this review, we aim to present recent findings on the genetics of VDs, review the role of genetic sequencing tools, and explore the potential for individualized medicine in the treatment of these disorders. Methods: A search of the PubMed database was performed for English language studies relevant to the genetic basis of and therapies for vestibular disorders, using search terms including but not limited to: “genetics,” “genomics,” “vestibular disorders,” “hearing loss with vestibular dysfunction,” “individualized medicine,” “genome-wide association studies,” “precision medicine,” and “Meniere's syndrome.” Results: Increasing numbers of studies on vestibular disorder genetics have been published in recent years. Next-generation sequencing and new genetic tools are being utilized to unearth the significance of the genomic findings in terms of understanding disease etiology and clinical utility, with growing research interest being shown for individualized gene therapy for some disorders. Conclusions: The genetic knowledge base for vestibular disorders is still in its infancy. Identifying the genetic causes of balance problems is imperative in our understanding of the biology of normal function of the vestibule and the disease etiology and process. There is an increasing effort to use new and efficient genetic sequencing tools to discover the genetic causes for these diseases, leading to the hope for precise and personalized treatment for these patients.
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Affiliation(s)
- Christine Mei
- Department of Otolaryngology, University of Miami, Coral Gables, FL, United States
| | - Hongsong Dong
- Department of Otolaryngology, University of Miami, Coral Gables, FL, United States.,Shenzhen Second People's Hospital, Shenzhen, China
| | - Eric Nisenbaum
- Department of Otolaryngology, University of Miami, Coral Gables, FL, United States
| | - Torin Thielhelm
- Department of Otolaryngology, University of Miami, Coral Gables, FL, United States
| | - Aida Nourbakhsh
- Department of Otolaryngology, University of Miami, Coral Gables, FL, United States
| | - Denise Yan
- Department of Otolaryngology, University of Miami, Coral Gables, FL, United States
| | - Molly Smeal
- Department of Otolaryngology, University of Miami, Coral Gables, FL, United States
| | - Yesha Lundberg
- Department of Otolaryngology, Boys Town National Research Hospital, Omaha, NE, United States
| | - Michael E Hoffer
- Department of Otolaryngology, University of Miami, Coral Gables, FL, United States
| | - Simon Angeli
- Department of Otolaryngology, University of Miami, Coral Gables, FL, United States
| | - Fred Telischi
- Department of Otolaryngology, University of Miami, Coral Gables, FL, United States
| | - Guohui Nie
- Shenzhen Second People's Hospital, Shenzhen, China
| | - Susan H Blanton
- Department of Otolaryngology, University of Miami, Coral Gables, FL, United States
| | - Xuezhong Liu
- Department of Otolaryngology, University of Miami, Coral Gables, FL, United States
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Escalera-Balsera A, Roman-Naranjo P, Lopez-Escamez JA. Systematic Review of Sequencing Studies and Gene Expression Profiling in Familial Meniere Disease. Genes (Basel) 2020; 11:E1414. [PMID: 33260921 PMCID: PMC7761472 DOI: 10.3390/genes11121414] [Citation(s) in RCA: 8] [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: 10/01/2020] [Revised: 11/21/2020] [Accepted: 11/25/2020] [Indexed: 02/06/2023] Open
Abstract
Familial Meniere Disease (FMD) is a rare inner ear disorder characterized by episodic vertigo associated with sensorineural hearing loss, tinnitus and/or aural fullness. We conducted a systematic review to find sequencing studies segregating rare variants in FMD to obtain evidence to support candidate genes for MD. After evaluating the quality of the retrieved records, eight studies were selected to carry out a quantitative synthesis. These articles described 20 single nucleotide variants (SNVs) in 11 genes (FAM136A, DTNA, PRKCB, COCH, DPT, SEMA3D, STRC, HMX2, TMEM55B, OTOG and LSAMP), most of them in singular families-the exception being the OTOG gene. Furthermore, we analyzed the pathogenicity of each SNV and compared its allelic frequency with reference datasets to evaluate its role in the pathogenesis of FMD. By retrieving gene expression data in these genes from different databases, we could classify them according to their gene expression in neural or inner ear tissues. Finally, we evaluated the pattern of inheritance to conclude which genes show an autosomal dominant (AD) or autosomal recessive (AR) inheritance in FMD.
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Affiliation(s)
- Alba Escalera-Balsera
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, Centro Pfizer-Universidad de Granada-Junta de Andalucía de Genómica e Investigación Oncológica, 18016 Granada, Spain; (A.E.-B.); (P.R.-N.)
| | - Pablo Roman-Naranjo
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, Centro Pfizer-Universidad de Granada-Junta de Andalucía de Genómica e Investigación Oncológica, 18016 Granada, Spain; (A.E.-B.); (P.R.-N.)
| | - Jose Antonio Lopez-Escamez
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, Centro Pfizer-Universidad de Granada-Junta de Andalucía de Genómica e Investigación Oncológica, 18016 Granada, Spain; (A.E.-B.); (P.R.-N.)
- Department of Otolaryngology, Instituto de Investigación Biosanitaria, ibs.GRANADA, Hospital Universitario Virgen de las Nieves, 18014 Granada, Spain
- Department of Surgery, Division of Otolaryngology, Universidad de Granada, 18016 Granada, Spain
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Gallego-Martinez A, Lopez-Escamez JA. Genetic architecture of Meniere’s disease. Hear Res 2020; 397:107872. [DOI: 10.1016/j.heares.2019.107872] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 11/12/2019] [Accepted: 12/09/2019] [Indexed: 01/26/2023]
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Martinez-Gomez E, Gallego-Martinez A, Roman-Naranjo P, Lopez-Escamez JA. Clinical and molecular genetics of Meniere disease. MED GENET-BERLIN 2020. [DOI: 10.1515/medgen-2020-2019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Abstract
Meniere disease (MD) represents a heterogeneous group of relatively rare disorders of the inner ear that causes vertigo attacks, fluctuating sensorineural hearing loss (SNHL) involving low and medium frequencies, tinnitus, and aural fullness. MD has been attributed to an accumulation of endolymph in the cochlear duct. The diagnosis of MD is based on the phenomenological association of clinical symptoms including SNHL during the vertigo attacks. At least two mechanisms are involved in MD: (a) a pro-inflammatory immune response mediated by interleukin-1 beta (IL-1β), tumor necrosis factor alpha (TNFα), and IL-6, and (b) nuclear factor-kappa B (NF-κB)-mediated inflammation in the carriers of the single nucleotide variant rs4947296. The majority of MD cases are considered sporadic, although familial aggregation has been recognized in European and East Asian populations in multiplex families, supporting a genetic contribution to the disease. In sporadic MD cases, the main genetic findings involve multiplex rare variants in several SNHL genes, such as GJB2, USH1G, SLC26A4, ESRRB, and CLDN14, and axonal guidance signaling genes, such as NTN4 and NOX3. Familial aggregation has been reported in 6–8 % of MD cases, and most families show an autosomal dominant inheritance. Few rare missense heterozygous variants have been described in simplex families in six genes (COCH, FAM136A, DTNA, PRKCB, SEMA3D, and DPT). Of note, 33 % of familial MD individuals show singleton and multiplex rare missense variants in the OTOG gene, suggesting a multiallelic inheritance. Moreover, potentially pathogenic rare variants in the familial genes FAM136A, DTNA, and DPT have been reported in Korean singletons with sporadic MD. Rare variants may have a significant contribution to sporadic and familial MD. The interaction of common cis-regulatory variants located in non-coding regions and rare variants in coding regions in one or more genes will determine the variation on the phenotype in MD. Further studies on genotype–phenotype correlations are required to improve the yield of genetic diagnosis, and different types of variants seem to contribute to the genetic structure of MD.
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Affiliation(s)
- Estrella Martinez-Gomez
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, GENYO. Centre for Genomics and Oncological Research: Pfizer/University of Granada/Andalusian Regional Government , PTS Granada , Avenida de la Ilustración, 114 , Granada , Spain
| | - Alvaro Gallego-Martinez
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, GENYO. Centre for Genomics and Oncological Research: Pfizer/University of Granada/Andalusian Regional Government , PTS Granada , Avenida de la Ilustración, 114 , Granada , Spain
| | - Pablo Roman-Naranjo
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, GENYO. Centre for Genomics and Oncological Research: Pfizer/University of Granada/Andalusian Regional Government , PTS Granada , Avenida de la Ilustración, 114 , Granada , Spain
| | - Jose A. Lopez-Escamez
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, GENYO. Centre for Genomics and Oncological Research: Pfizer/University of Granada/Andalusian Regional Government , PTS Granada , Avenida de la Ilustración, 114 , Granada , Spain
- Department of Otolaryngology, Instituto de Investigación Biosanitaria Ibs.GRANADA , Hospital Universitario Virgen de las Nieves, Universidad de Granada , Granada , Spain
- Department of Surgery, Division of Otolaryngology , Universidad de Granada , Granada , Spain
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Espinosa-Sanchez JM, Lopez-Escamez JA. The pharmacological management of vertigo in Meniere disease. Expert Opin Pharmacother 2020; 21:1753-1763. [DOI: 10.1080/14656566.2020.1775812] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Juan Manuel Espinosa-Sanchez
- Department of Otolaryngology, Instituto de Investigación Biosanitaria Ibs.GRANADA, Hospital Universitario Virgen de las Nieves, Universidad de Granada, Granada, Spain
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, GENYO. Centre for Genomics and Oncological Research: Pfizer/University of Granada/Andalusian Regional, Government PTS Granada, Granada, Spain
| | - José A. Lopez-Escamez
- Department of Otolaryngology, Instituto de Investigación Biosanitaria Ibs.GRANADA, Hospital Universitario Virgen de las Nieves, Universidad de Granada, Granada, Spain
- Otology & Neurotology Group CTS 495, Department of Genomic Medicine, GENYO. Centre for Genomics and Oncological Research: Pfizer/University of Granada/Andalusian Regional, Government PTS Granada, Granada, Spain
- Department of Surgery, Division of Otolaryngology, Universidad de Granada, Granada, Spain
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Mehrjoo Z, Kahrizi K, Mohseni M, Akbari M, Arzhangi S, Jalalvand K, Najmabadi H, Farhadi M, Mohseni M, Asghari A, Mohebbi S, Daneshi A. Limbic System Associated Membrane Protein Mutation in an Iranian Family Diagnosed with Ménière's Disease. ARCHIVES OF IRANIAN MEDICINE 2020; 23:319-325. [PMID: 32383616 DOI: 10.34172/aim.2020.21] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2019] [Accepted: 01/26/2020] [Indexed: 12/31/2022]
Abstract
BACKGROUND Ménière's disease (MD) is a common inner ear disorder which is characterized by recurrent attacks of vertigo, fluctuating sensorineural hearing loss (SNHL), tinnitus, and a sense of fullness in the affected ear. MD is a complex disorder; although six genes have been linked to familial autosomal dominant form of the disease, in many cases, the exact genetic etiology remains elusive. METHODS To elucidate the genetic causes of MD in an Iranian family, we performed exome sequencing on all members of the family: consanguineous parents and four children (two affected and two unaffected). Variant filtering was completed using a customized workflow keeping variants based on segregation with MD in autosomal recessive (AR) inheritance pattern, minor allele frequency (MAF), and in-silico prediction of pathogenicity. RESULTS Analysis revealed that in this family, 970 variants co-segregated with MD in AR pattern, out of which eight variants (one intergenic, four intronic, and three exonic) were extremely rare. The exonic variants included a synonymous substitution in USP3 gene, an in-frame deletion in ZBED2 gene, and a rare, highly conserved deleterious missense alteration in LSAMP gene. CONCLUSION The phenotype observed in the proband described here, i.e. vertigo, poor sense of smell, tinnitus, and borderline hearing ability, may originate from aberrant changes in the cerebellum and limbic system due to a deleterious mutation in the LSAMP gene; hence, LSAMP mutation is a possible candidate for the etiology of MD in this family.
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Affiliation(s)
- Zohreh Mehrjoo
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Kimia Kahrizi
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Marzieh Mohseni
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Mojdeh Akbari
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Sanaz Arzhangi
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Khadijeh Jalalvand
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Hossein Najmabadi
- Genetics Research Center, University of Social Welfare and Rehabilitation Sciences, Tehran, Iran
| | - Mohammad Farhadi
- ENT and Head & Neck Research Center and Department, Hazrat Rasoul Hospital, The Five Senses Institute, Iran University of Medical Sciences, Tehran, Iran
| | - Mohammad Mohseni
- ENT and Head & Neck Research Center and Department, Hazrat Rasoul Hospital, The Five Senses Institute, Iran University of Medical Sciences, Tehran, Iran
| | - Alimohamad Asghari
- Skull Base Research Center, The Five Senses Institute, Iran University of Medical Sciences, Tehran, Iran
| | - Saleh Mohebbi
- Skull Base Research Center, The Five Senses Institute, Iran University of Medical Sciences, Tehran, Iran
| | - Ahmad Daneshi
- ENT and Head & Neck Research Center and Department, Hazrat Rasoul Hospital, The Five Senses Institute, Iran University of Medical Sciences, Tehran, Iran
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Cipriani V, Pontikos N, Arno G, Sergouniotis PI, Lenassi E, Thawong P, Danis D, Michaelides M, Webster AR, Moore AT, Robinson PN, Jacobsen JO, Smedley D. An Improved Phenotype-Driven Tool for Rare Mendelian Variant Prioritization: Benchmarking Exomiser on Real Patient Whole-Exome Data. Genes (Basel) 2020; 11:E460. [PMID: 32340307 PMCID: PMC7230372 DOI: 10.3390/genes11040460] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Revised: 04/08/2020] [Accepted: 04/16/2020] [Indexed: 02/06/2023] Open
Abstract
Next-generation sequencing has revolutionized rare disease diagnostics, but many patients remain without a molecular diagnosis, particularly because many candidate variants usually survive despite strict filtering. Exomiser was launched in 2014 as a Java tool that performs an integrative analysis of patients' sequencing data and their phenotypes encoded with Human Phenotype Ontology (HPO) terms. It prioritizes variants by leveraging information on variant frequency, predicted pathogenicity, and gene-phenotype associations derived from human diseases, model organisms, and protein-protein interactions. Early published releases of Exomiser were able to prioritize disease-causative variants as top candidates in up to 97% of simulated whole-exomes. The size of the tested real patient datasets published so far are very limited. Here, we present the latest Exomiser version 12.0.1 with many new features. We assessed the performance using a set of 134 whole-exomes from patients with a range of rare retinal diseases and known molecular diagnosis. Using default settings, Exomiser ranked the correct diagnosed variants as the top candidate in 74% of the dataset and top 5 in 94%; not using the patients' HPO profiles (i.e., variant-only analysis) decreased the performance to 3% and 27%, respectively. In conclusion, Exomiser is an effective support tool for rare Mendelian phenotype-driven variant prioritization.
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Affiliation(s)
- Valentina Cipriani
- William Harvey Research Institute, Queen Mary University of London, London EC1M 6BQ, UK; (J.O.B.J.); (D.S.)
- UCL Institute of Ophthalmology, University College London, London EC1V 9EL, UK; (N.P.); (G.A.); (M.M.); (A.R.W.); (A.T.M.)
- Moorfields Eye Hospital NHS Foundation Trust, London EC1V 2PD, UK
- UCL Genetics Institute, University College London, London WC1E 6AA, UK
| | - Nikolas Pontikos
- UCL Institute of Ophthalmology, University College London, London EC1V 9EL, UK; (N.P.); (G.A.); (M.M.); (A.R.W.); (A.T.M.)
- Moorfields Eye Hospital NHS Foundation Trust, London EC1V 2PD, UK
| | - Gavin Arno
- UCL Institute of Ophthalmology, University College London, London EC1V 9EL, UK; (N.P.); (G.A.); (M.M.); (A.R.W.); (A.T.M.)
- Moorfields Eye Hospital NHS Foundation Trust, London EC1V 2PD, UK
- North East Thames Regional Genetics Laboratory, Great Ormond Street Hospital NHS Trust, London WC1N 3BH, UK
| | | | - Eva Lenassi
- Manchester Royal Eye Hospital & University of Manchester, Manchester M13 9WL, UK; (P.I.S.); (E.L.)
| | - Penpitcha Thawong
- Department of Medical Sciences, Medical Genetics Section, National Institute of Health, Ministry of Public Health, Nonthaburi 11000, Thailand;
| | - Daniel Danis
- The Jackson Laboratory for Genomic Medicine, Farmington, CT 06032, USA; (D.D.); (P.N.R.)
| | - Michel Michaelides
- UCL Institute of Ophthalmology, University College London, London EC1V 9EL, UK; (N.P.); (G.A.); (M.M.); (A.R.W.); (A.T.M.)
- Moorfields Eye Hospital NHS Foundation Trust, London EC1V 2PD, UK
| | - Andrew R. Webster
- UCL Institute of Ophthalmology, University College London, London EC1V 9EL, UK; (N.P.); (G.A.); (M.M.); (A.R.W.); (A.T.M.)
- Moorfields Eye Hospital NHS Foundation Trust, London EC1V 2PD, UK
| | - Anthony T. Moore
- UCL Institute of Ophthalmology, University College London, London EC1V 9EL, UK; (N.P.); (G.A.); (M.M.); (A.R.W.); (A.T.M.)
- Moorfields Eye Hospital NHS Foundation Trust, London EC1V 2PD, UK
- Ophthalmology Department, UCSF School of Medicine, San Francisco, CA 94143-0644, USA
| | - Peter N. Robinson
- The Jackson Laboratory for Genomic Medicine, Farmington, CT 06032, USA; (D.D.); (P.N.R.)
| | - Julius O.B. Jacobsen
- William Harvey Research Institute, Queen Mary University of London, London EC1M 6BQ, UK; (J.O.B.J.); (D.S.)
| | - Damian Smedley
- William Harvey Research Institute, Queen Mary University of London, London EC1M 6BQ, UK; (J.O.B.J.); (D.S.)
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22
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Oh EH, Shin JH, Kim HS, Cho JW, Choi SY, Choi KD, Rhee JK, Lee S, Lee C, Choi JH. Rare Variants of Putative Candidate Genes Associated With Sporadic Meniere's Disease in East Asian Population. Front Neurol 2020; 10:1424. [PMID: 32038468 PMCID: PMC6987317 DOI: 10.3389/fneur.2019.01424] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 12/31/2019] [Indexed: 12/13/2022] Open
Abstract
Objectives: The cause of Meniere's disease (MD) is unclear but likely involves genetic and environmental factors. The aim of this study was to investigate the genetic basis underlying MD by screening putative candidate genes for MD. Methods: Sixty-eight patients who met the diagnostic criteria for MD of the Barany Society were included. We performed targeted gene sequencing using next generation sequencing (NGS) panel composed of 45 MD-associated genes. We identified the rare variants causing non-synonymous amino acid changes, stop codons, and insertions/deletions in the coding regions, and excluded the common variants with minor allele frequency >0.01 in public databases. The pathogenicity of the identified variants was analyzed by various predictive tools and protein structural modeling. Results: The average read depth for the targeted regions was 1446.3-fold, and 99.4% of the targeted regions were covered by 20 or more reads, achieving the high quality of the sequencing. After variant filtering, annotation, and interpretation, we identified a total of 15 rare heterozygous variants in 12 (17.6%) sporadic patients. Among them, four variants were detected in familial MD genes (DTNA, FAM136A, DPT), and the remaining 11 in MD-associated genes (PTPN22, NFKB1, CXCL10, TLR2, MTHFR, SLC44A2, NOS3, NOTCH2). Three patients had the variants in two or more genes. All variants were not detected in our healthy controls (n = 100). No significant differences were observed between patients with and without a genetic variant in terms of sex, mean age of onset, bilaterality, the type of MD, and hearing threshold at diagnosis. Conclusions: Our study identified rare variants of putative candidate genes in some of MD patients. The genes were related to the formation of inner ear structures, the immune-associated process, or systemic hemostasis derangement, suggesting the multiple genetic predispositions in the development of MD.
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Affiliation(s)
- Eun Hye Oh
- Department of Neurology, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University School of Medicine, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Jin-Hong Shin
- Department of Neurology, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University School of Medicine, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Hyang-Sook Kim
- Department of Neurology, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University School of Medicine, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Jae Wook Cho
- Department of Neurology, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University School of Medicine, Pusan National University Yangsan Hospital, Yangsan, South Korea
| | - Seo Young Choi
- Department of Neurology, Pusan National University Hospital, Pusan National University School of Medicine and Biomedical Research Institute, Busan, South Korea
| | - Kwang-Dong Choi
- Department of Neurology, Pusan National University Hospital, Pusan National University School of Medicine and Biomedical Research Institute, Busan, South Korea
| | - Je-Keun Rhee
- School of Systems Biomedical Science, Soongsil University, Seoul, South Korea
| | - Seowhang Lee
- Department of Biological Sciences, School of Life Sciences, Ulsan National Institute of Sciences and Technology, Ulsan, South Korea
| | - Changwook Lee
- Department of Biological Sciences, School of Life Sciences, Ulsan National Institute of Sciences and Technology, Ulsan, South Korea
| | - Jae-Hwan Choi
- Department of Neurology, Research Institute for Convergence of Biomedical Science and Technology, Pusan National University School of Medicine, Pusan National University Yangsan Hospital, Yangsan, South Korea
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23
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Magnan J, Özgirgin ON, Trabalzini F, Lacour M, Escamez AL, Magnusson M, Güneri EA, Guyot JP, Nuti D, Mandalà M. European Position Statement on Diagnosis, and Treatment of Meniere's Disease. J Int Adv Otol 2019; 14:317-321. [PMID: 30256205 DOI: 10.5152/iao.2018.140818] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Meniere Disease keeps challenges in its diagnosis and treatment since was defined by Prosper Meniere at the beginning of 19th Century. Several classifications and definition were made until now and speculations still exist on its etiology. As the etiology remains speculative the treatment models remain in discussion also. The European Academy of Otology and Neurotology Vertigo Guidelines Study Group intended to work on the diagnosis and treatment of Meniere's disease and created the European Positional Statement Document also by resuming the consensus studies on it. The new techniques on diagnosis are emphasized as well as the treatment models for each stage of the disease are clarified by disregarding the dilemmas on its treatment. The conservative, noninvasive and invasive therapeutic models are highlighted.
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Affiliation(s)
- Jacques Magnan
- Past Head of ORL and Head and Neck Surgery Hopital Nord, Aix Marseille University, Marseille, France
| | - O Nuri Özgirgin
- Department of Otolaryngology, Bayındır Hospital, Ankara, Turkey
| | - Franco Trabalzini
- Department of Otolaryngology, Ospedale Pediatrico Meyer, Firenze, Italy
| | - Michel Lacour
- Aix-Marseille Université, Fédération de recherche 3C: Cerveau, Comportement, Cognition de Marseille St Charles, Marseille, France
| | | | | | - Enis Alpin Güneri
- Department of Otolaryngology, Dokuz Eylul University School of Medicine, İzmir, Turkey
| | - Jean Philippe Guyot
- Department of Neurosciences, Hopitaux Universitaires Geneve, Geneve, Switzerland
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24
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Vijayakumar S, Jones SM, Jones TA, Tian C, Johnson KR. Spontaneous mutations of the Zpld1 gene in mice cause semicircular canal dysfunction but do not impair gravity receptor or hearing functions. Sci Rep 2019; 9:12430. [PMID: 31455802 PMCID: PMC6711997 DOI: 10.1038/s41598-019-48835-5] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2019] [Accepted: 08/13/2019] [Indexed: 11/23/2022] Open
Abstract
The cupula is a gelatinous membrane overlying the crista ampullaris of the semicircular canal, important for sensing rotation of the head and critical for normal balance. Recently the zona pellucida like domain containing 1 protein (ZPLD1, also known as cupulin) was identified in the cupula of fish. Here, we describe two new spontaneous mutations in the mouse Zpld1 gene, which were discovered by the circling behavior of mutant mice, an indicator of balance dysfunction. The Zpld1 mutant mice exhibited normal hearing function as assessed by auditory brainstem response (ABR) measurements, and their otolithic organs appeared normal. In the inner ear, Zpld1 mRNA expression was detected only in the hair cells and supporting cells of the crista ampullaris. Normal vestibular sensory evoked potential (VsEP) responses and abnormal vestibulo-ocular reflex (VOR) responses demonstrated that the vestibular dysfunction of the Zpld1 mutant mice is caused by loss of sensory input for rotary head movements (detected by cristae ampullaris) and not by loss of input for linear head translations (detected by maculae of the utricle and saccule). Taken together, these results are consistent with ZPLD1 being an important functional component of the cupula, but not tectorial or otoconial membranes.
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Affiliation(s)
- Sarath Vijayakumar
- Department of Special Education and Communication Disorders, University of Nebraska, Lincoln, NE, USA.,Biomedical Sciences, Creighton University School of Medicine, Omaha, NE, USA
| | - Sherri M Jones
- Department of Special Education and Communication Disorders, University of Nebraska, Lincoln, NE, USA
| | - Timothy A Jones
- Department of Special Education and Communication Disorders, University of Nebraska, Lincoln, NE, USA.
| | - Cong Tian
- The Jackson Laboratory, Bar Harbor, ME, USA
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25
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Lopez-Escamez JA, Attyé A. Systematic review of magnetic resonance imaging for diagnosis of Meniere disease. J Vestib Res 2019; 29:121-129. [PMID: 31356219 DOI: 10.3233/ves-180646] [Citation(s) in RCA: 36] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The diagnostic criteria for Meniere Disease (MD) are clinical and include two categories: definite MD and probable MD, based on clinical examination and without the necessity of advanced vestibular or audiological testing. The condition is a heterogeneous disorder and it is associated with endolymphatic hydrops (EH), an accumulation of endolymph in the inner ear that causes damage to the ganglion cells. Patients with suspected EH can be examined by Magnetic Resonance Imaging (MRI), offering new insights into these inner ear disorders. Results of imaging studies using the hydrops protocols show conflicting results in MD patients. These discrepancies can be dependent either on the MRI sequence parameters or on the method of hydrops grading or the inclusion criteria to select patients. The visualization of EH can be classified based on a semi-quantitative ratio between endolymph and perilymph liquids, or on the distinction between the saccule and the utricle structures. In addition, MRI can also be used to evaluate whether cochleovestibular nerves can present with imaging signs of axonal loss.In this systematic review, we have selected case-controlled studies to better characterize the potential added value in the diagnosis and management of patients with MD. Using different techniques, studies have identified the saccule as the most specifically involved structure in MD, and saccular hydrops seems to be associated with low to medium-tone sensorineural hearing loss degree. However, early symptoms still appear too subtle for identification using MRI and the reproducibility of the hydrops protocols with various MRI scan manufacturers is debatable, thus limiting expansion of these techniques into clinical practice for the diagnosis of MD at this time.Further research is needed. The future inclusion of semicircular canal hydrops location in the imaging signs and the application of MRI in patients with atypical presentations hold promise.
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Affiliation(s)
- Jose A. Lopez-Escamez
- Otology and Neurotology Group CTS495, Department of Genomic Medicine- Centro de Genómica e Investigación Oncológica – Pfizer/Universidad de Granada/Junta de Andalucía (Genyo), PTS, Granada, Spain
- Department of Otolaryngology, Instituto de Investigación Biosanitaria, ibs.Granada, Hospital Universitario Virgen de las Nieves, Granada, Spain
| | - Arnaud Attyé
- Department of Neuroradiology and MRI, Grenoble, France
- IRMaGe Facility, Grenoble Alps University, Grenoble, France
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26
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Zou J. Autoinflammatory characteristics and short-term effects of delivering high-dose steroids to the surface of the intact endolymphatic sac and incus in refractory Ménière's disease. J Otol 2019; 14:40-50. [PMID: 31223300 PMCID: PMC6570643 DOI: 10.1016/j.joto.2019.01.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2018] [Revised: 12/28/2018] [Accepted: 01/03/2019] [Indexed: 12/20/2022] Open
Abstract
Objective To investigate immune-related genetic background in intractable Meniere’s disease (MD) and the immediate results of a novel therapy by delivering steroids to the surface of the intact endolymphatic sac (ES) and incus in a sustainable manner. Case report and methods Candidate genes involved in immune regulation were sequenced using a next-generation sequencing method in a patient with intractable MD. Mutations were confirmed using the Sanger sequencing method. The ES was exposed, and gelatin sponge particles were immersed in high-dose methylprednisolone solution and placed onto the surface of ES. “L”-shaped gelatin sponge strips were immersed in dexamethasone solution and served as a guiding device for the steroids by touching the incus and gelatin sponge particles on the surface of the ES. Gelatin sponge particles immersed in dexamethasone solution were placed around the gelatin sponge strips and sealed using fibrin glue. Results Autoinflammation in the refractory MD case was indicated by genotype, including novel heterozygous mutations of PRF1, UNC13D, SLC29A3, ITCH, and JAK3, as well as phenotype. The vertigo was fully relieved immediately after operation. Tinnitus and aural fullness were resolved 3 weeks after operation, whereas hearing improved in 2 mon postoperation. No recurrence was noted during the 5-monfollow-up, and the final MRI supported the novel therapeutic hypothesis. Conclusion Autoinflammation was involved in a refractory MD. This novel therapy, which involves the delivery of steroids to the surface of the intact ES and incus, is effective in relieving vertigo and tinnitus and improves hearing function of refractory MD.
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Affiliation(s)
- Jing Zou
- Department of Otolaryngology-Head and Neck Surgery, Center for Otolaryngology-Head & Neck Surgery of Chinese PLA, Changhai Hospital, Second Military Medical University, Shanghai, China
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27
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Skarp S, Kanervo L, Kotimäki J, Sorri M, Männikkö M, Hietikko E. Whole-exome sequencing suggests multiallelic inheritance for childhood-onset Ménière's disease. Ann Hum Genet 2019; 83:389-396. [PMID: 31106404 DOI: 10.1111/ahg.12327] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2018] [Revised: 03/18/2019] [Accepted: 04/29/2019] [Indexed: 01/22/2023]
Abstract
The genetic background of Ménière's disease (MD) was studied in one patient with childhood-onset MD and his grandfather affected with middle age-onset MD. Whole-exome sequencing was performed and the data were compared to 76 exomes from unrelated subjects without MD. Thirteen rare inner ear expressed variants with pathogenic estimations were observed in the case of childhood-onset MD. These variants were in genes involved in the formation of cell membranes or the cytoskeleton and in genes participating in cell death or gene-regulation pathways. His grandfather shared two of the variants: p.Y273N in HMX2 and p.L229F in TMEM55B. HMX2 p.Y273N was considered the more likely candidate for MD, as the gene is known to affect both hearing and vestibular function. The variant in the HMX2 gene may affect inner ear development and structural integrity and thus might predispose to the onset of MD. As there was a significant difference in onset between the patients, an accumulation of defects in several pathways is probably responsible for the exceptionally early onset of the disease, and the genetic etiology of childhood-onset MD is most likely multifactorial. This is the first molecular genetic study of childhood-onset MD.
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Affiliation(s)
- Sini Skarp
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland.,Center for Life Course Health Research, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Laura Kanervo
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland
| | - Jouko Kotimäki
- Department of Otorhinolaryngology, Kainuu Central Hospital, Kajaani, Finland
| | - Martti Sorri
- Department of Otorhinolaryngology and Head and Neck Surgery, Oulu University Hospital, Finland & PEDEGO Research Unit, University of Oulu, Oulu, Finland
| | - Minna Männikkö
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland.,Center for Life Course Health Research, Faculty of Medicine, University of Oulu, Oulu, Finland.,Infrastructure for Population Studies, Faculty of Medicine, University of Oulu, Oulu, Finland
| | - Elina Hietikko
- Faculty of Biochemistry and Molecular Medicine, University of Oulu, Oulu, Finland.,Center for Life Course Health Research, Faculty of Medicine, University of Oulu, Oulu, Finland
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28
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Penêda JF, Lima NB, Monteiro F, Silva JV, Gama R, Condé A. Immune-Mediated Inner Ear Disease: Diagnostic and therapeutic approaches. ACTA OTORRINOLARINGOLOGICA ESPANOLA 2019. [DOI: 10.1016/j.otorri.2017.08.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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29
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Penêda JF, Lima NB, Monteiro F, Silva JV, Gama R, Condé A. Immune-Mediated Inner Ear Disease: Diagnostic and therapeutic approaches. ACTA OTORRINOLARINGOLOGICA ESPANOLA 2019. [DOI: 10.1016/j.otoeng.2017.08.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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30
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Gallego-Martinez A, Requena T, Roman-Naranjo P, Lopez-Escamez JA. Excess of Rare Missense Variants in Hearing Loss Genes in Sporadic Meniere Disease. Front Genet 2019; 10:76. [PMID: 30828346 PMCID: PMC6385525 DOI: 10.3389/fgene.2019.00076] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2018] [Accepted: 01/28/2019] [Indexed: 12/25/2022] Open
Abstract
Meniere's disease (MD) is a clinical spectrum of rare disorders characterized by vertigo attacks, associated with sensorineural hearing loss (SNHL) and tinnitus involving low to medium frequencies. Although it shows familial aggregation with incomplete phenotypic forms and variable expressivity, most cases are considered sporadic. The aim of this study was to investigate the burden for rare variation in SNHL genes in patients with sporadic MD. We conducted a targeted-sequencing study including SNHL and familial MD genes in 890 MD patients to compare the frequency of rare variants in cases using three independent public datasets as controls. Patients with sporadic MD showed a significant enrichment of missense variants in SNHL genes that was not found in the controls. The list of genes includes GJB2, USH1G, SLC26A4, ESRRB, and CLDN14. A rare synonymous variant with unknown significance was found in the MARVELD2 gene in several unrelated patients with MD. There is a burden of rare variation in certain SNHL genes in sporadic MD. Furthermore, the interaction of common and rare variants in SNHL genes may have an additive effect on MD phenotype. This study will contribute to design a gene panel for the genetic diagnosis of MD.
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Affiliation(s)
- Alvaro Gallego-Martinez
- Otology and Neurotology Group CTS 495, Department of Genomic Medicine, Centre for Genomics and Oncological Research (GENyO), Pfizer, University of Granada, Andalusian Regional Government, Granada, Spain
| | - Teresa Requena
- Otology and Neurotology Group CTS 495, Department of Genomic Medicine, Centre for Genomics and Oncological Research (GENyO), Pfizer, University of Granada, Andalusian Regional Government, Granada, Spain
| | - Pablo Roman-Naranjo
- Otology and Neurotology Group CTS 495, Department of Genomic Medicine, Centre for Genomics and Oncological Research (GENyO), Pfizer, University of Granada, Andalusian Regional Government, Granada, Spain
| | - Jose A. Lopez-Escamez
- Otology and Neurotology Group CTS 495, Department of Genomic Medicine, Centre for Genomics and Oncological Research (GENyO), Pfizer, University of Granada, Andalusian Regional Government, Granada, Spain
- Department of Otolaryngology, Instituto de Investigación Biosanitaria (ibs. GRANADA), Hospital Universitario Virgen de las Nieves, Universidad de Granada, Granada, Spain
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31
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32
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Murofushi T, Tsubota M, Kitao K, Yoshimura E. Simultaneous Presentation of Definite Vestibular Migraine and Definite Ménière's Disease: Overlapping Syndrome of Two Diseases. Front Neurol 2018; 9:749. [PMID: 30250448 PMCID: PMC6139324 DOI: 10.3389/fneur.2018.00749] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2018] [Accepted: 08/17/2018] [Indexed: 01/01/2023] Open
Abstract
Objectives: To review the clinical records of patients that exhibited the clinical features of both vestibular migraine (VM) and Ménière's disease (MD) during each episodic vertigo attack and to discuss the possible pathophysiology of such combination of symptoms. Subjects: Ten patients that were selected according to criteria based on a combination of the diagnostic criteria for definite MD and VM (9 females and one male, age: 22–54 years) were enrolled. They were required to show features of both diseases in each vertigo attack. Methods: The patients' medical histories and pure-tone audiometry, cervical vestibular evoked myogenic potential (cVEMP), video head-impulse test (vHIT), and caloric test results were examined. cVEMP was recorded using 500 and 1,000 Hz short tone bursts (125dBSPL, air-conducted), 500 Hz-1,000 Hz cVEMP slope, an index of endolymphatic hydrops in the saccule was calculated using normalized amplitudes of p13-n23. For performing vHIT, each subject was seated 1.5 m in front of a target and asked to keep watching it as their head was passively rotated by the examiner. Their eye movements were evaluated using video-oculography while their head movements were recorded using inertial sensors. Results: The patients were predominantly female. On average, the onset of migrainous headaches occurred 9 years earlier than the onset of vertigo attacks. All of the patients but one had migraines with auras. Five of the 10 patients had a family history of vertigo attacks accompanied by both migrainous and auditory symptoms. The patients mainly displayed hearing loss at low frequencies. Nine patients exhibited 500–1,000 Hz cVEMP slope < −19.9, which was suggestive of endolymphatic hydrops. None of the patients who underwent vHIT showed abnormal canal function. One patient showed unilaterally decreased caloric responses. Conclusions: These patients presented with simultaneous MD and VM signs/symptoms might be referred to “VM/MD overlapping syndrome (VM/MD-OS)” as a new clinical syndrome.
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Affiliation(s)
- Toshihisa Murofushi
- Department of Otolaryngology, Teikyo University School of Medicine Mizonokuchi Hospital, Kawasaki, Japan
| | - Masahito Tsubota
- Department of Otolaryngology, Teikyo University School of Medicine Mizonokuchi Hospital, Kawasaki, Japan
| | - Kyoko Kitao
- Department of Otolaryngology, Teikyo University School of Medicine Mizonokuchi Hospital, Kawasaki, Japan
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33
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Abstract
Ménière's disease (MD) represents a heterogeneous group of relatively rare disorders with three core symptoms: episodic vertigo, tinnitus, and sensorineural hearing loss involving 125 to 2,000 Hz frequencies. The majority of cases are considered sporadic, although familial aggregation has been recognized in European and Korean populations, and the search for familial MD genes has been elusive until the last few years. Detailed phenotyping and cluster analyses have found several clinical predictors for different subgroups of patients, which may indicate different mechanisms, including genetic and immune factors. The genes associated with familial MD are COCH, FAM136A, DTNA, PRKCB, SEMA3D, and DPT. At least two mechanisms have been involved in MD: (a) a pro-inflammatory immune response mediated by interleukin-1 beta (IL-1β), tumor necrosis factor alpha (TNFα), and IL-6, and (b) a nuclear factor-kappa B (NF-κB)-mediated inflammation in the carriers of the single-nucleotide variant rs4947296. It is conceivable that microbial antigens trigger inflammation with release of pro-inflammatory cytokines at different sites within the cochlea, such as the endolymphatic sac, the stria vascularis, or the spiral ligament, leading to fluid imbalance with an accumulation of endolymph. Computational integration of clinical and "omics" data eventually should transform the management of MD from "one pill fits all" to precise patient stratification and a personalized approach. This article lays out a proposal for an algorithm for the genetic diagnosis of MD. This approach will facilitate the identification of new molecular targets for individualized treatment, including immunosuppressant and gene therapy, in the near future.
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Affiliation(s)
- Jose Antonio Lopez-Escamez
- Otology & Neurotology Group CTS495, Department of Genomic Medicine, Centro de Genómica e Investigación Oncológica, Pfizer/Universidad de Granada/Junta de Andalucía (GENYO), Granada, Spain.,Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, Esch-sur-Alzette, Luxembourg.,Department of Otolaryngology, Instituto de Investigación Biosanitaria, ibs.GRANADA, Hospital Universitario Virgen de las Nieves, Universidad de Granada, Granada, Spain
| | | | - Alexandre Bisdorff
- Clinique du Vertige, Centre Hospitalier Emile Mayrisch, Esch-sur-Alzette, Luxembourg
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Rujescu D, Hartmann AM, Giegling I, Konte B, Herrling M, Himmelein S, Strupp M. Genome-Wide Association Study in Vestibular Neuritis: Involvement of the Host Factor for HSV-1 Replication. Front Neurol 2018; 9:591. [PMID: 30079052 PMCID: PMC6062961 DOI: 10.3389/fneur.2018.00591] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 07/02/2018] [Indexed: 12/11/2022] Open
Abstract
Objective: In order to identify genetic variants associated with vestibular neuritis, a common cause of peripheral vertigo with a potential causative link to the reactivation of herpes simplex type 1 (HSV-1), we conducted a genome-wide association study. Methods: Association was assessed using approximately 8 million variants. 131 patients with vestibular neuritis and 2,609 controls of European ancestry were included. Results: Genome-wide associations with vestibular neuritis were detected in 4 regions containing protein coding genes assignable to two functional groups: virus hypothesis and insulin metabolism. Genes of set 1 are related to viral processes: nuclear receptor subfamily 3 group C member 2 (NR3C2) is a receptor for mineralocorticoids and glucocorticoids and was shown to be a host factor for HSV-1 replication. Ankyrin repeat domain 30A (ANKRD30A) encodes a host factor for human immunodeficiency virus-1 (HIV-1) infection. It shows rapid evolution and is induced by interferon stimulation. Mediator complex 30 (MED30), an important member of the mediator complex, has been shown to be involved in replication of HIV-1, a knockdown leading to impaired viral replication. The second set of genes LIM homeobox transcription factor 1 alpha (LMX1A), solute carrier family 30 member 8 (SLC30A8) is associated with insulin metabolism and resistance, a feature of some patients in whom type 2 diabetes is an accompanying comorbidity of vestibular neuritis. Conclusions: Using a GWAS approach to evaluate the etiology of vestibular neuritis these findings provide another piece of evidence that it may be caused by a viral inflammation.
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Affiliation(s)
- Dan Rujescu
- German Center for Vertigo and Balance Disorders, University Hospital Munich, Munich, Germany.,Department of Psychiatry, Psychotherapy and Psychosomatics, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Annette M Hartmann
- Department of Psychiatry, Psychotherapy and Psychosomatics, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Ina Giegling
- German Center for Vertigo and Balance Disorders, University Hospital Munich, Munich, Germany.,Department of Psychiatry, Psychotherapy and Psychosomatics, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Bettina Konte
- Department of Psychiatry, Psychotherapy and Psychosomatics, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Marko Herrling
- German Center for Vertigo and Balance Disorders, University Hospital Munich, Munich, Germany
| | - Susanne Himmelein
- German Center for Vertigo and Balance Disorders, University Hospital Munich, Munich, Germany.,Department of Neurology, University Hospital Munich, Munich, Germany
| | - Michael Strupp
- German Center for Vertigo and Balance Disorders, University Hospital Munich, Munich, Germany.,Department of Neurology, University Hospital Munich, Munich, Germany
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35
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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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Gallego-Martinez A, Espinosa-Sanchez JM, Lopez-Escamez JA. Genetic contribution to vestibular diseases. J Neurol 2018; 265:29-34. [PMID: 29582143 DOI: 10.1007/s00415-018-8842-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Revised: 03/18/2018] [Accepted: 03/20/2018] [Indexed: 12/22/2022]
Abstract
Growing evidence supports the contribution of allelic variation to vestibular disorders. Heritability attributed to rare allelic variants is found in familial vestibular syndromes such as enlarged vestibular aqueduct syndrome or familial Meniere disease. However, the involvement of common allelic variants as key regulators of physiological processes in common and rare vestibular diseases is starting to be deciphered, including motion sickness or sporadic Meniere disease. The genetic contribution to most of the vestibular disorders is still largely unknown. This review will outline the role of common and rare variants in human genome to episodic vestibular syndromes, progressive vestibular syndrome, and hereditary sensorineural hearing loss associated with vestibular phenotype. Future genomic studies and network analyses of omic data will clarify the pathway towards a personalized stratification of treatments.
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Affiliation(s)
- Alvaro Gallego-Martinez
- Otology and Neurotology Group CTS495, Department of Genomic Medicine, Centre for Genomics and Oncological Research-Pfizer/University of Granada/Andalusian Regional Government (GENYO), Avda de la Ilustración, 114, 18016, Granada, Spain
| | - Juan Manuel Espinosa-Sanchez
- Otology and Neurotology Group CTS495, Department of Genomic Medicine, Centre for Genomics and Oncological Research-Pfizer/University of Granada/Andalusian Regional Government (GENYO), Avda de la Ilustración, 114, 18016, Granada, Spain
- Department of Otolaryngology, Instituto de Investigación Biosanitaria ibs.GRANADA, Hospital Universitario Virgen de las Nieves, Granada, Spain
| | - Jose Antonio Lopez-Escamez
- Otology and Neurotology Group CTS495, Department of Genomic Medicine, Centre for Genomics and Oncological Research-Pfizer/University of Granada/Andalusian Regional Government (GENYO), Avda de la Ilustración, 114, 18016, Granada, Spain.
- Luxembourg Centre for Systems Biomedicine (LCSB), University of Luxembourg, Esch-sur-Alzette, Luxembourg.
- Department of Otolaryngology, Instituto de Investigación Biosanitaria ibs.GRANADA, Hospital Universitario Virgen de las Nieves, Granada, Spain.
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Ahmad H, Requena T, Frejo L, Cobo M, Gallego-Martinez A, Martin F, Lopez-Escamez JA, Bronstein AM. Clinical and Functional Characterization of a Missense ELF2 Variant in a CANVAS Family. Front Genet 2018; 9:85. [PMID: 29628936 PMCID: PMC5876245 DOI: 10.3389/fgene.2018.00085] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 02/28/2018] [Indexed: 12/30/2022] Open
Abstract
Cerebellar ataxia with neuropathy and bilateral vestibular areflexia syndrome (CANVAS) is a rare disorder with an unknown etiology. We present a British family with presumed autosomal dominant CANVAS with incomplete penetrance and variable expressivity. Exome sequencing identified a rare missense variant in the ELF2 gene at chr4:g.140058846 C > T, c.10G > A, p.A4T which segregated in all affected patients. By using transduced BE (2)-M17 cells, we found that the mutated ELF2 (mt-ELF2) gene increased ATXN2 and reduced ELOVL5 gene expression, the causal genes of type 2 and type 38 spinocerebellar ataxias. Both, western blot and confocal microscopy confirmed an increase of ataxin-2 in BE(2)-M17 cells transduced with lentivirus expressing mt-ELF2 (CEE-mt-ELF2), which was not observed in cells transduced with lentivirus expressing wt-ELF2 (CEE-wt-ELF2). Moreover, we observed a significant decrease in the number and size of lipid droplets in the CEE-mt-ELF2-transduced BE (2)-M17 cells, but not in the CEE-wt-ELF2-transduced BE (2)-M17. Furthermore, changes in the expression of ELOVL5 could be related with the reduction of lipid droplets in BE (2)-M17 cells. This work supports that ELF2 gene regulates the expression of ATXN2 and ELOVL5 genes, and defines new molecular links in the pathophysiology of cerebellar ataxias.
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Affiliation(s)
- Hena Ahmad
- Division of Brain Sciences, Imperial College, Charing Cross Hospital, London, United Kingdom.,National Hospital for Neurology & Neurosurgery, London, United Kingdom
| | - Teresa Requena
- Otology and Neurotology Group CTS495, Department of Genomic Medicine, Centro de Genómica e Investigación Oncológica (GENYO), Pfizer-Universidad de Granada-Junta de Andalucía, Granada, Spain
| | - Lidia Frejo
- Otology and Neurotology Group CTS495, Department of Genomic Medicine, Centro de Genómica e Investigación Oncológica (GENYO), Pfizer-Universidad de Granada-Junta de Andalucía, Granada, Spain
| | - Marien Cobo
- Gene and Cell Therapy Group, Department of Genomic Medicine, Centro de Genómica e Investigación Oncológica (GENYO), Pfizer-Universidad de Granada-Junta de Andalucía, Granada, Spain
| | - Alvaro Gallego-Martinez
- Otology and Neurotology Group CTS495, Department of Genomic Medicine, Centro de Genómica e Investigación Oncológica (GENYO), Pfizer-Universidad de Granada-Junta de Andalucía, Granada, Spain
| | - Francisco Martin
- Gene and Cell Therapy Group, Department of Genomic Medicine, Centro de Genómica e Investigación Oncológica (GENYO), Pfizer-Universidad de Granada-Junta de Andalucía, Granada, Spain
| | - Jose A Lopez-Escamez
- Otology and Neurotology Group CTS495, Department of Genomic Medicine, Centro de Genómica e Investigación Oncológica (GENYO), Pfizer-Universidad de Granada-Junta de Andalucía, Granada, Spain.,Department of Otolaryngology, Instituto de Investigación Biosanitaria ibs.GRANADA, Hospital Virgen de las Nieves, Universidad de Granada, Granada, Spain
| | - Adolfo M Bronstein
- Division of Brain Sciences, Imperial College, Charing Cross Hospital, London, United Kingdom.,National Hospital for Neurology & Neurosurgery, London, United Kingdom
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Frejo L, Requena T, Okawa S, Gallego-Martinez A, Martinez-Bueno M, Aran I, Batuecas-Caletrio A, Benitez-Rosario J, Espinosa-Sanchez JM, Fraile-Rodrigo JJ, García-Arumi AM, González-Aguado R, Marques P, Martin-Sanz E, Perez-Fernandez N, Pérez-Vázquez P, Perez-Garrigues H, Santos-Perez S, Soto-Varela A, Tapia MC, Trinidad-Ruiz G, Del Sol A, Alarcon Riquelme ME, Lopez-Escamez JA. Regulation of Fn14 Receptor and NF-κB Underlies Inflammation in Meniere's Disease. Front Immunol 2017; 8:1739. [PMID: 29326686 PMCID: PMC5733484 DOI: 10.3389/fimmu.2017.01739] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Accepted: 11/23/2017] [Indexed: 12/17/2022] Open
Abstract
Meniere’s disease (MD) is a rare disorder characterized by episodic vertigo, sensorineural hearing loss, tinnitus, and aural fullness. It is associated with a fluid imbalance between the secretion of endolymph in the cochlear duct and its reabsorption into the subarachnoid space, leading to an accumulation of endolymph in the inner ear. Epidemiological evidence, including familial aggregation, indicates a genetic contribution and a consistent association with autoimmune diseases (AD). We conducted a case–control study in two phases using an immune genotyping array in a total of 420 patients with bilateral MD and 1,630 controls. We have identified the first locus, at 6p21.33, suggesting an association with bilateral MD [meta-analysis leading signal rs4947296, OR = 2.089 (1.661–2.627); p = 1.39 × 10−09]. Gene expression profiles of homozygous genotype-selected peripheral blood mononuclear cells (PBMCs) demonstrated that this region is a trans-expression quantitative trait locus (eQTL) in PBMCs. Signaling analysis predicted several tumor necrosis factor-related pathways, the TWEAK/Fn14 pathway being the top candidate (p = 2.42 × 10−11). This pathway is involved in the modulation of inflammation in several human AD, including multiple sclerosis, systemic lupus erythematosus, or rheumatoid arthritis. In vitro studies with genotype-selected lymphoblastoid cells from patients with MD suggest that this trans-eQTL may regulate cellular proliferation in lymphoid cells through the TWEAK/Fn14 pathway by increasing the translation of NF-κB. Taken together; these findings suggest that the carriers of the risk genotype may develop an NF-κB-mediated inflammatory response in MD.
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Affiliation(s)
- Lidia Frejo
- Otology and Neurotology Group CTS495, Department of Genomic Medicine - Centre for Genomics and Oncological Research - Pfizer/Universidad de Granada/Junta de Andalucía (GENYO), Granada, Spain
| | - Teresa Requena
- Otology and Neurotology Group CTS495, Department of Genomic Medicine - Centre for Genomics and Oncological Research - Pfizer/Universidad de Granada/Junta de Andalucía (GENYO), Granada, Spain
| | - Satoshi Okawa
- Computational Biology Group, Luxembourg Centre for Systems Biomedicine (LCSB), Universite du Luxembourg, Belval, Luxembourg
| | - Alvaro Gallego-Martinez
- Otology and Neurotology Group CTS495, Department of Genomic Medicine - Centre for Genomics and Oncological Research - Pfizer/Universidad de Granada/Junta de Andalucía (GENYO), Granada, Spain
| | - Manuel Martinez-Bueno
- Group of Genetics of Complex Diseases, Department of Genomic Medicine - Centre for Genomics and Oncological Research - Pfizer/Universidad de Granada/Junta de Andalucía (GENYO), Granada, Spain
| | - Ismael Aran
- Department of Otolaryngology, Complexo Hospitalario de Pontevedra, Pontevedra, Spain
| | | | - Jesus Benitez-Rosario
- Department of Otolaryngology, Hospital Universitario de Gran Canaria Dr Negrin, Las Palmas de Gran Canaria, Las Palmas, Spain
| | - Juan M Espinosa-Sanchez
- Otology and Neurotology Group CTS495, Department of Genomic Medicine - Centre for Genomics and Oncological Research - Pfizer/Universidad de Granada/Junta de Andalucía (GENYO), Granada, Spain.,Department of Otolaryngology, Instituto de Investigación Biosanitaria ibs.GRANADA, Hospital Universitario Virgen de las Nieves, Granada, Spain
| | | | - Ana María García-Arumi
- Department of Otorhinolaryngology, Hospital Universitario Vall d'Hebron, Barcelona, Spain
| | - Rocío González-Aguado
- Department of Otorhinolaryngology, Hospital Universitario Marqués de Valdecilla, Santander, Cantabria, Spain
| | - Pedro Marques
- Department of Otorhinolaryngology, Centro Hospitalar de S.João, EPE, University of Porto Medical School, Porto, Portugal
| | - Eduardo Martin-Sanz
- Department of Otolaryngology, Hospital Universitario de Getafe, Getafe, Madrid, Spain
| | | | - Paz Pérez-Vázquez
- Department of Otorhinolaryngology, Hospital Universitario de Cabueñes, Gijón, Asturias, Spain
| | | | - Sofía Santos-Perez
- Division of Otoneurology, Department of Otorhinolaryngology, Complexo Hospitalario Universitario, Santiago de Compostela, Spain
| | - Andres Soto-Varela
- Division of Otoneurology, Department of Otorhinolaryngology, Complexo Hospitalario Universitario, Santiago de Compostela, Spain
| | - Maria C Tapia
- Department of Otorhinolaryngology, Instituto Antolí Candela, Madrid, Spain
| | - Gabriel Trinidad-Ruiz
- Division of Otoneurology, Department of Otorhinolaryngology, Complejo Hospitalario Badajoz, Badajoz, Spain
| | - Antonio Del Sol
- Computational Biology Group, Luxembourg Centre for Systems Biomedicine (LCSB), Universite du Luxembourg, Belval, Luxembourg
| | - Marta E Alarcon Riquelme
- Group of Genetics of Complex Diseases, Department of Genomic Medicine - Centre for Genomics and Oncological Research - Pfizer/Universidad de Granada/Junta de Andalucía (GENYO), Granada, Spain.,Unit of Chronic Inflammatory Diseases, Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Jose A Lopez-Escamez
- Otology and Neurotology Group CTS495, Department of Genomic Medicine - Centre for Genomics and Oncological Research - Pfizer/Universidad de Granada/Junta de Andalucía (GENYO), Granada, Spain.,Department of Otolaryngology, Instituto de Investigación Biosanitaria ibs.GRANADA, Hospital Universitario Virgen de las Nieves, Granada, Spain.,Luxembourg Centre for System Biomedicine (LCSB), Universite du Luxembourg, Belval, Luxembourg
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Sun Y, Zhang D, Sun G, Lv Y, Li Y, Li X, Song Y, Li J, Fan Z, Wang H. RNA-sequencing study of peripheral blood mononuclear cells in sporadic Ménière's disease patients: possible contribution of immunologic dysfunction to the development of this disorder. Clin Exp Immunol 2017; 192:33-45. [PMID: 29164594 DOI: 10.1111/cei.13083] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/09/2017] [Indexed: 12/13/2022] Open
Abstract
To date, the pathogenesis of Ménière's disease (MD) remains unclear. This study aims to investigate the possible relationship between potential immune system-related genes and sporadic MD. The whole RNA-sequencing (RNA-seq) technology was used to analyse the transcriptome of peripheral blood mononuclear cells of three MD patients and three control individuals. Of 366 differentially expressed genes (DEGs), 154 genes were up-regulated and 212 genes were down-regulated (|log2 fold change| > 1 and P < 0·05). Gene ontology (GO) enrichment analysis illustrated that immune relevant factors played a key role in the pathogenesis of MD. Of 366 DEGs, we focused upon analysing the possible immune-related genes, among which the significantly up-regulated genes [glutathione S-transferase mu 1 (GSTM1), transmembrane protein 176 (TMEM176)B, TMEM176A] and down-regulated genes [solute carrier family 4 member (SLC4A)10 and SLC4A1] especially drew our attention. The mRNA expression levels of GSTM1, TMEM176B, TMEM176A, SLC4A1 and SLC4A10 were analysed by quantitative reverse transcription-polymerase chain reaction (qRT-PCR). The serum concentration of GSTM1, TMEM176B and SLC4A10 proteins were measured by enzyme-linked immunosorbent assay (ELISA). Considering the results of qRT-PCR and ELISA, it was noteworthy that GSTM1 exhibited the highest fold change between two groups, which was consistent with the deep sequencing results by RNA-seq. In conclusion, our study first offers a new perspective in MD development on the basis of RNA expression patterns, suggesting that immune factors might be involved in the MD pathogenesis. Remarkably, GSTM1 might be a possible candidate gene for the diagnostic biomarker of MD and provides the basis for further biological and functional investigations.
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Affiliation(s)
- Y Sun
- Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China.,Shandong Provincial Key Laboratory of Otology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - D Zhang
- Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China.,Shandong Provincial Key Laboratory of Otology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - G Sun
- Shandong Provincial Key Laboratory of Otology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Y Lv
- Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Y Li
- Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - X Li
- Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Y Song
- Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China.,Shandong Provincial Key Laboratory of Otology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - J Li
- Shandong Provincial Key Laboratory of Otology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - Z Fan
- Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China.,Shandong Provincial Key Laboratory of Otology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
| | - H Wang
- Otolaryngology-Head and Neck Surgery, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China.,Shandong Provincial Key Laboratory of Otology, Shandong Provincial Hospital Affiliated to Shandong University, Jinan, China
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Cederroth CR, Kähler AK, Sullivan PF, Lopez-Escamez JA. Genetics of Tinnitus: Time to Biobank Phantom Sounds. Front Genet 2017; 8:110. [PMID: 28928766 PMCID: PMC5591447 DOI: 10.3389/fgene.2017.00110] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 08/09/2017] [Indexed: 12/13/2022] Open
Abstract
Tinnitus is a common phantom sensation resulting most often from sensory deprivation, and for which little knowledge on the molecular mechanisms exists. While the existing evidence for a genetic influence on the condition has been until now sparse and underpowered, recent data suggest that specific forms of tinnitus have a strong genetic component revealing that not all tinnitus percepts are alike, at least in how they are genetically driven. These new findings pave the way for a better understanding on how phantom sensations are molecularly driven and call for international biobanking efforts.
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Affiliation(s)
- Christopher R. Cederroth
- Experimental Audiology, Department of Physiology and Pharmacology, Karolinska InstitutetStockholm, Sweden
| | - Anna K. Kähler
- Department of Molecular Epidemiology and Biostatistics, Karolinska InstitutetStockholm, Sweden
| | - Patrick F. Sullivan
- Department of Molecular Epidemiology and Biostatistics, Karolinska InstitutetStockholm, Sweden
- Department of Genetics, University of North Carolina, Chapel HillNC, United States
- Department of Psychiatry, University of North Carolina, Chapel HillNC, United States
| | - Jose A. Lopez-Escamez
- Otology & Neurotology Group, Department of Genomic Medicine, Pfizer-Universidad de Granada-Junta de Andalucía Centre for Genomics and Oncology Research (GENyO)Granada, Spain
- Department of Otolaryngology, Instituto de Investigación Biosanitaria ibs.GRANADA, Hospital Virgen de las Nieves, Universidad de GranadaGranada, Spain
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Requena T, Gallego-Martinez A, Lopez-Escamez JA. A pipeline combining multiple strategies for prioritizing heterozygous variants for the identification of candidate genes in exome datasets. Hum Genomics 2017; 11:11. [PMID: 28532469 PMCID: PMC5441048 DOI: 10.1186/s40246-017-0107-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 05/11/2017] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The identification of disease-causing variants in autosomal dominant diseases using exome-sequencing data remains a difficult task in small pedigrees. We combined several strategies to improve filtering and prioritizing of heterozygous variants using exome-sequencing datasets in familial Meniere disease: an in-house Pathogenic Variant (PAVAR) score, the Variant Annotation Analysis and Search Tool (VAAST-Phevor), Exomiser-v2, CADD, and FATHMM. We also validated the method by a benchmarking procedure including causal mutations in synthetic exome datasets. RESULTS PAVAR and VAAST were able to select the same sets of candidate variants independently of the studied disease. In contrast, Exomiser V2 and VAAST-Phevor had a variable correlation depending on the phenotypic information available for the disease on each family. Nevertheless, all the selected diseases ranked a limited number of concordant variants in the top 10 ranking, using the three systems or other combined algorithm such as CADD or FATHMM. Benchmarking analyses confirmed that the combination of systems with different approaches improves the prediction of candidate variants compared with the use of a single method. The overall efficiency of combined tools ranges between 68 and 71% in the top 10 ranked variants. CONCLUSIONS Our pipeline prioritizes a short list of heterozygous variants in exome datasets based on the top 10 concordant variants combining multiple systems.
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Affiliation(s)
- Teresa Requena
- Otology & Neurotology Group CTS495, Department of Genomic Medicine, GENYO - Centre for Genomics and Oncological Research – Pfizer/University of Granada/Junta de Andalucía, PTS, 18016 Granada, Spain
| | - Alvaro Gallego-Martinez
- Otology & Neurotology Group CTS495, Department of Genomic Medicine, GENYO - Centre for Genomics and Oncological Research – Pfizer/University of Granada/Junta de Andalucía, PTS, 18016 Granada, Spain
| | - Jose A. Lopez-Escamez
- Otology & Neurotology Group CTS495, Department of Genomic Medicine, GENYO - Centre for Genomics and Oncological Research – Pfizer/University of Granada/Junta de Andalucía, PTS, 18016 Granada, Spain
- Department of Otolaryngology, Complejo Hospitalario Universidad de Granada (CHUGRA), ibs.granada, 18014 Granada, Spain
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Vona B, Nanda I, Shehata-Dieler W, Haaf T. Genetics of Tinnitus: Still in its Infancy. Front Neurosci 2017; 11:236. [PMID: 28533738 PMCID: PMC5421307 DOI: 10.3389/fnins.2017.00236] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 04/10/2017] [Indexed: 12/20/2022] Open
Abstract
Tinnitus is the perception of a phantom sound that affects between 10 and 15% of the general population. Despite this considerable prevalence, treatments for tinnitus are presently lacking. Tinnitus exhibits a diverse array of recognized risk factors and extreme clinical heterogeneity. Furthermore, it can involve an unknown number of auditory and non-auditory networks and molecular pathways. This complex combination has hampered advancements in the field. The identification of specific genetic factors has been at the forefront of several research investigations in the past decade. Nine studies have examined genes in a case-control association approach. Recently, a genome-wide association study has highlighted several potentially significant pathways that are implicated in tinnitus. Two twin studies have calculated a moderate heritability for tinnitus and disclosed a greater concordance rate in monozygotic twins compared to dizygotic twins. Despite the more recent data alluding to genetic factors in tinnitus, a strong association with any specific genetic locus is lacking and a genetic study with sufficient statistical power has yet to be designed. Future research endeavors must overcome the many inherent limitations in previous study designs. This review summarizes the previously embarked upon tinnitus genetic investigations and summarizes the hurdles that have been encountered. The identification of candidate genes responsible for tinnitus may afford gene based diagnostic approaches, effective therapy development, and personalized therapeutic intervention.
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Affiliation(s)
- Barbara Vona
- Institute of Human Genetics, Julius Maximilians University WürzburgWürzburg, Germany
| | - Indrajit Nanda
- Institute of Human Genetics, Julius Maximilians University WürzburgWürzburg, Germany
| | - Wafaa Shehata-Dieler
- Plastic, Aesthetic and Reconstructive Surgery, Department of Otorhinolaryngology, Comprehensive Hearing Center, University Hospital WürzburgWürzburg, Germany
| | - Thomas Haaf
- Institute of Human Genetics, Julius Maximilians University WürzburgWürzburg, Germany
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Frejo L, Martin-Sanz E, Teggi R, Trinidad G, Soto-Varela A, Santos-Perez S, Manrique R, Perez N, Aran I, Almeida-Branco MS, Batuecas-Caletrio A, Fraile J, Espinosa-Sanchez JM, Perez-Guillen V, Perez-Garrigues H, Oliva-Dominguez M, Aleman O, Benitez J, Perez P, Lopez-Escamez JA. Extended phenotype and clinical subgroups in unilateral Meniere disease: A cross-sectional study with cluster analysis. Clin Otolaryngol 2017; 42:1172-1180. [PMID: 28166395 DOI: 10.1111/coa.12844] [Citation(s) in RCA: 91] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/30/2017] [Indexed: 01/19/2023]
Abstract
OBJECTIVES To define clinical subgroups by cluster analysis in patients with unilateral Meniere disease (MD) and to compare them with the clinical subgroups found in bilateral MD. DESIGN A cross-sectional study with a two-step cluster analysis. SETTINGS A tertiary referral multicenter study. PARTICIPANTS Nine hundred and eighty-eight adult patients with unilateral MD. MAIN OUTCOME MEASURES best predictors to define clinical subgroups with potential different aetiologies. RESULTS We established five clusters in unilateral MD. Group 1 is the most frequently found, includes 53% of patients, and it is defined as the sporadic, classic MD without migraine and without autoimmune disorder (AD). Group 2 is found in 8% of patients, and it is defined by hearing loss, which antedates the vertigo episodes by months or years (delayed MD), without migraine or AD in most of cases. Group 3 involves 13% of patients, and it is considered familial MD, while group 4, which includes 15% of patients, is linked to the presence of migraine in all cases. Group 5 is found in 11% of patients and is defined by a comorbid AD. We found significant differences in the distribution of AD in clusters 3, 4 and 5 between patients with uni- and bilateral MD. CONCLUSIONS Cluster analysis defines clinical subgroups in MD, and it extends the phenotype beyond audiovestibular symptoms. This classification will help to improve the phenotyping in MD and facilitate the selection of patients for randomised clinical trials.
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Affiliation(s)
- L Frejo
- Otology & Neurotology Group CTS495, Department of Genomic Medicine- Centro de Genómica e Investigación Oncológica - Pfizer/Universidad de Granada/Junta de Andalucía (GENYO), Granada, Spain
| | - E Martin-Sanz
- Department of Otolaryngology, Hospital Universitario de Getafe, Getafe, Spain
| | - R Teggi
- Department of Otolaryngology, San Raffaelle Scientific Institute, Milan, Italy
| | - G Trinidad
- Division of Otoneurology, Department of Otorhinolaryngology, Complejo Hospitalario Universitario de Badajoz, Badajoz, Spain
| | - A Soto-Varela
- Division of Otoneurology, Department of Otorhinolaryngology, Complexo Hospitalario Universitario, Santiago de Compostela, Spain
| | - S Santos-Perez
- Division of Otoneurology, Department of Otorhinolaryngology, Complexo Hospitalario Universitario, Santiago de Compostela, Spain
| | - R Manrique
- Department of Otolaryngology, Clinica Universidad de Navarra, Pamplona, Spain
| | - N Perez
- Department of Otolaryngology, Clinica Universidad de Navarra, Pamplona, Spain
| | - I Aran
- Department of Otolaryngology, Complexo Hospitalario de Pontevedra, Pontevedra, Spain
| | - M S Almeida-Branco
- Department of Otolaryngology, Hospital de Poniente, El Ejido, Almería, Spain
| | - A Batuecas-Caletrio
- Department of Otolaryngology, Hospital Universitario Salamanca, Salamanca, Spain
| | - J Fraile
- Department of Otolaryngology, Hospital Miguel Servet, Zaragoza, Spain
| | - J M Espinosa-Sanchez
- Otology & Neurotology Group CTS495, Department of Genomic Medicine- Centro de Genómica e Investigación Oncológica - Pfizer/Universidad de Granada/Junta de Andalucía (GENYO), Granada, Spain.,Department of Otorhinolaryngology, Hospital San Agustin, Linares, Jaen, Spain
| | - V Perez-Guillen
- Department of Otorhinolaryngology, Hospital Universitario La Fe, Valencia, Spain
| | - H Perez-Garrigues
- Department of Otorhinolaryngology, Hospital Universitario La Fe, Valencia, Spain
| | - M Oliva-Dominguez
- Department of Otorhinolaryngology, Hospital Costa del Sol, Marbella, Malaga, Spain
| | - O Aleman
- Department of Otolaryngology, Hospital General Universitario de Alicante, Alicante, Spain
| | - J Benitez
- Department of Otolaryngology, Hospital Universitario de Gran Canaria Dr Negrin, Las Palmas, Spain
| | - P Perez
- Department of Otorhinolaryngology, Hospital Universitario de Cabueñes, Gijon, Spain
| | - J A Lopez-Escamez
- Otology & Neurotology Group CTS495, Department of Genomic Medicine- Centro de Genómica e Investigación Oncológica - Pfizer/Universidad de Granada/Junta de Andalucía (GENYO), Granada, Spain.,Department of Otolaryngology, Instituto de Investigación Biosanitaria ibs.GRANADA, Complejo Hospitalario Universidad de Granada (CHUGRA), Granada, Spain
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45
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Kim BG, Kim JY, Jung J, Moon IS, Yoon JH, Choi JY, Kim SH. β 1- and β 2-adrenergic stimulation-induced electrogenic transport by human endolymphatic sac epithelium and its clinical implications. Sci Rep 2017; 7:42217. [PMID: 28165045 PMCID: PMC5292703 DOI: 10.1038/srep42217] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2016] [Accepted: 01/03/2017] [Indexed: 01/02/2023] Open
Abstract
The endolymphatic sac (ES) is a cystic structure of the inner ear connected to the cochlea and vestibule, which plays a role in regulating ion homeostasis in inner ear fluid. Disruption of ion homeostasis can cause inner ear disorders with hearing loss and dizziness, such as Meniere's disease. Herein, we found, for the first time, functional evidence for the involvement of β1- and β2-adrenergic receptors in apical electrogenic ion transport by human ES epithelium by using electrophysiological/pharmacological and molecular biological methods, which were dependent on K+ and Cl- ion transport. The apical electrogenic transport was absent or very weak in ES epithelia of patients with Meniere's disease. These results suggested that adrenergic stimulation via β1- and β2-adrenergic receptors in the human ES was involved in regulation of inner ear fluid ion homeostasis and impairment of this response could be a pathological mechanism of Meniere's disease.
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Affiliation(s)
- Bo Gyung Kim
- Department of Otorhinolaryngology, Soonchunhyang University College of Medicine, Bucheon, 420-767, Republic of Korea
| | - Jin Young Kim
- Research Center for Natural Human Defense System, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Republic of Korea
| | - JinSei Jung
- Department of Otorhinolaryngology, Yonsei University College of Medicine
| | - In Seok Moon
- Department of Otorhinolaryngology, Yonsei University College of Medicine
| | - Joo-Heon Yoon
- Research Center for Natural Human Defense System, Brain Korea 21 PLUS Project for Medical Science, Yonsei University College of Medicine, Republic of Korea.,Department of Otorhinolaryngology, Yonsei University College of Medicine.,The Airway Mucus Institute, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
| | - Jae Young Choi
- Department of Otorhinolaryngology, Yonsei University College of Medicine.,The Airway Mucus Institute, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
| | - Sung Huhn Kim
- Department of Otorhinolaryngology, Yonsei University College of Medicine.,The Airway Mucus Institute, Yonsei University College of Medicine, Seoul, 03722, Republic of Korea
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46
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Variable expressivity and genetic heterogeneity involving DPT and SEMA3D genes in autosomal dominant familial Meniere's disease. Eur J Hum Genet 2016; 25:200-207. [PMID: 27876815 DOI: 10.1038/ejhg.2016.154] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 10/08/2016] [Accepted: 10/13/2016] [Indexed: 01/03/2023] Open
Abstract
Autosomal dominant (AD) familial Meniere's disease (FMD) is a rare disorder involving the inner ear defined by sensorineural hearing loss, tinnitus and episodic vertigo. Here, we have identified two novel and rare heterozygous variants in the SEMA3D and DPT genes segregating with the complete phenotype that have variable expressivity in two pedigrees with AD-FMD. A detailed characterization of the phenotype within each family illustrates the clinical heterogeneity in the onset and progression of the disease. We also showed the expression of both genes in the human cochlea and performed in silico analyses of these variants. Three-dimensional protein modelling showed changes in the structure of the protein indicating potential physical interactions. These results confirm a genetic heterogeneity in FMD with incomplete penetrance and variable expressivity.
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47
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Lopez-Escamez JA, Bibas T, Cima RFF, Van de Heyning P, Knipper M, Mazurek B, Szczepek AJ, Cederroth CR. Genetics of Tinnitus: An Emerging Area for Molecular Diagnosis and Drug Development. Front Neurosci 2016; 10:377. [PMID: 27594824 PMCID: PMC4990555 DOI: 10.3389/fnins.2016.00377] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 08/03/2016] [Indexed: 12/13/2022] Open
Abstract
Subjective tinnitus is the perception of sound in the absence of external or bodily-generated sounds. Chronic tinnitus is a highly prevalent condition affecting over 70 million people in Europe. A wide variety of comorbidities, including hearing loss, psychiatric disorders, neurodegenerative disorders, and temporomandibular joint (TMJ) dysfunction, have been suggested to contribute to the onset or progression of tinnitus; however, the precise molecular mechanisms of tinnitus are not well understood and the contribution of genetic and epigenetic factors remains unknown. Human genetic studies could enable the identification of novel molecular therapeutic targets, possibly leading to the development of novel pharmaceutical therapeutics. In this article, we briefly discuss the available evidence for a role of genetics in tinnitus and consider potential hurdles in designing genetic studies for tinnitus. Since multiple diseases have tinnitus as a symptom and the supporting genetic evidence is sparse, we propose various strategies to investigate the genetic underpinnings of tinnitus, first by showing evidence of heritability using concordance studies in twins, and second by improving patient selection according to phenotype and/or etiology in order to control potential biases and optimize genetic data output. The increased knowledge resulting from this endeavor could ultimately improve the drug development process and lead to the preventive or curative treatment of tinnitus.
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Affiliation(s)
- Jose A Lopez-Escamez
- Otology and Neurotology Group, Department of Genomic Medicine, Pfizer - Universidad de Granada - Junta de Andalucía Centro de Genómica e Investigación Oncológica, PTSGranada, Spain; Department of Otolaryngology, Instituto de Investigación Biosanitaria ibs.GRANADA, Complejo Hospital Universitario GranadaGranada, Spain
| | - Thanos Bibas
- 1st Department of Otolaryngology, National and Kapodistrian University of Athens, Hippocrateion HospitalAthens, Greece; Ear Institute, UCLLondon, UK
| | - Rilana F F Cima
- Department of Clinical Psychological Science, Maastricht University Maastricht, Netherlands
| | - Paul Van de Heyning
- University Department ENT and Head and Neck Surgery, Antwerp University Hospital, University of Antwerp Antwerp, Belgium
| | - Marlies Knipper
- Hearing Research Centre Tübingen, Molecular Physiology of Hearing Tübingen, Germany
| | - Birgit Mazurek
- Tinnitus Center, Charité-Universitätsmedizin Berlin Berlin, Germany
| | | | - Christopher R Cederroth
- Experimental Audiology, Department of Physiology and Pharmacology, Karolinska Institutet Stockholm, Sweden
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