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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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Parra-Perez AM, Lopez-Escamez JA. Types of Inheritance and Genes Associated with Familial Meniere Disease. J Assoc Res Otolaryngol 2023:10.1007/s10162-023-00896-0. [PMID: 37022572 DOI: 10.1007/s10162-023-00896-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 03/15/2023] [Indexed: 04/07/2023] Open
Abstract
Meniere disease (MD) is a rare disorder of the inner ear defined by sensorineural hearing loss (SNHL) associated with episodes of vertigo and tinnitus. The phenotype is variable, and it may be associated with other comorbidities such as migraine, respiratory allergies, and several autoimmune disorders. The condition has a significant heritability according to epidemiological and familial segregation studies. Familial MD is found in 10% of cases, the most frequently found genes being OTOG, MYO7A, and TECTA, previously associated with autosomal dominant and recessive non-syndromic SNHL. These findings suggest a new hypothesis where proteins involved in the extracellular structures in the apical surface of sensory epithelia (otolithic and tectorial membranes) and proteins in the stereocilia links would be key elements in the pathophysiology of MD. The ionic homeostasis of the otolithic and tectorial membranes could be critical to suppress the innate motility of individual hair cell bundles. Initially, focal detachment of these extracellular membranes may cause random depolarization of hair cells and will explain changes in tinnitus loudness or trigger vertigo attacks in early stages of MD. With the progression of the disease, a larger detachment will lead to an otolithic membrane herniation into the horizontal semicircular canal with dissociation in caloric and head impulse responses. Familial MD shows different types of inheritance, including autosomal dominant and compound recessive patterns and implementation of genetic testing will improve our understanding of the genetic structure of MD.
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Affiliation(s)
- Alberto M Parra-Perez
- Meniere's Disease Neuroscience Research Program, Faculty of Medicine & Health, School of Medical Sciences, The Kolling Institute, University of Sydney, 10 Westbourne St, St Leonards NSW 2064, Sydney, NSW, Australia
- Otology and Neurotology Group CTS495, Department of Genomic Medicine, GENYO - Centre for Genomics and Oncological Research - Pfizer, University of Granada, PTS, Junta de Andalucía, Granada, Spain
- Division of Otolaryngology, Department of Surgery, Instituto de Investigación Biosanitaria, Ibs.GRANADA, Universidad de Granada, Granada, Spain
- Sensorineural Pathology Programme, Centro de Investigación Biomédica en Red en Enfermedades Raras, CIBERER, Madrid, Spain
| | - Jose A Lopez-Escamez
- Meniere's Disease Neuroscience Research Program, Faculty of Medicine & Health, School of Medical Sciences, The Kolling Institute, University of Sydney, 10 Westbourne St, St Leonards NSW 2064, Sydney, NSW, Australia.
- Otology and Neurotology Group CTS495, Department of Genomic Medicine, GENYO - Centre for Genomics and Oncological Research - Pfizer, University of Granada, PTS, Junta de Andalucía, Granada, Spain.
- Division of Otolaryngology, Department of Surgery, Instituto de Investigación Biosanitaria, Ibs.GRANADA, Universidad de Granada, Granada, Spain.
- Sensorineural Pathology Programme, Centro de Investigación Biomédica en Red en Enfermedades Raras, CIBERER, Madrid, Spain.
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