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Aygun D, Dumur S, Elgormus MN, Alpaslan MS, Uzun H. Serum Otoconin-90 and Otolin-1 Concentrations in Benign Paroxysmal Positional Vertigo. Biomolecules 2024; 14:1279. [PMID: 39456211 PMCID: PMC11506338 DOI: 10.3390/biom14101279] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2024] [Revised: 10/08/2024] [Accepted: 10/09/2024] [Indexed: 10/28/2024] Open
Abstract
OBJECTIVE The aim was to evaluate the value of otolith-associated protein otoconin-90 (OC90) and otolin-1 in the pathogenesis research and clinical treatment of benign paroxysmal positional vertigo (BPPV). MATERIAL AND METHOD The study included 50 patients with BPPV admitted to neurology and otorhinolaryngology departments and 30 healthy subjects with no history of dizziness as a control group. RESULTS BPPV and controls were similar in terms of gender and age. Otolin-1 concentration was significantly greater in the BPPV group than in the controls (710.44 [584.35-837.39] vs 280.45 [212.7-419.61]; p < 0.001). No statistical significance was found, although OC90 was higher in the BPPV group than in the controls. There was a strong positive correlation between otolin-1 and OC90, a moderate negative correlation between otolin-1 and vitamin D, and a strong negative correlation between OC90 and vitamin D in the BPPV patient group. Otolin-1 had high specificity and AUC values for BPPV (AUC: 0.933; 95% CI: 0.881-0.986, 79.2% sensitivity, 100% specificity with a cutoff greater than 525). CONCLUSIONS High serum concentrations of otolin-1 were associated with an increased risk of BPPV, but high concentrations of OC90 were not. Serum concentrations of otolin-1 can potentially be used as a biomarker for the acute onset of inner ear disorders due to the significant increase in patients with BPPV. Vitamin D has high specificity and sensitivity in patients with BPPV. It also provides evidence that BPPV patients with vitamin D deficiency may improve their symptoms with replacement therapy. More large-scale prospective studies are required to confirm these associations and clarify the exact mechanisms.
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Affiliation(s)
- Demet Aygun
- Department of Neurology, Faculty of Medicine, Istanbul Atlas University, 34408 Istanbul, Turkey;
| | - Seyma Dumur
- Department of Medical Biochemistry, Faculty of Medicine, Istanbul Atlas University, 34408 Istanbul, Turkey;
| | - Mehmet Nuri Elgormus
- Department of Otorhinolaryngology, Faculty of Medicine, Istanbul Atlas University, 34408 Istanbul, Turkey; (M.N.E.); (M.S.A.)
| | - Mehmet Serkan Alpaslan
- Department of Otorhinolaryngology, Faculty of Medicine, Istanbul Atlas University, 34408 Istanbul, Turkey; (M.N.E.); (M.S.A.)
| | - Hafize Uzun
- Department of Medical Biochemistry, Faculty of Medicine, Istanbul Atlas University, 34408 Istanbul, Turkey;
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Ihler F, Brzoska T, Altindal R, Dziemba O, Völzke H, Busch CJ, Ittermann T. Prevalence and risk factors of self-reported hearing loss, tinnitus, and dizziness in a population-based sample from rural northeastern Germany. Sci Rep 2024; 14:17739. [PMID: 39085387 PMCID: PMC11291685 DOI: 10.1038/s41598-024-68577-3] [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: 12/21/2023] [Accepted: 07/25/2024] [Indexed: 08/02/2024] Open
Abstract
A close anatomical and physiological relationship is known between the senses of hearing and balance, while an additional pathophysiological interaction is supposed. The mechanisms underlying this association are not yet fully understood, especially in individuals without a known specific otologic disorder. In particular, only scarce information on the combined occurrence of audiovestibular sensory impairment is available so far. Therefore, this study aims to provide further insight into the prevalence and co-prevalence of the audiovestibular symptoms hearing loss, tinnitus and dizziness. Additionally, the influence of potential risk factors from lifestyle habits as well as cardiovascular and metabolic conditions on the development of those symptoms is studied. Data was analyzed from 8134 individuals from the population-based Study of Health in Pomerania (SHIP). SHIP pursues a broad and comprehensive examination program in chronologically separated cohorts with longitudinal follow-up. Cohorts are sampled from Western Pomerania, a rural region of north-eastern Germany. The study population represents a cross-sectional analysis from the cohorts SHIP-START (recruited 1997-2001) and SHIP-TREND (recruited 2008-2012), sampled for baseline investigations (SHIP-START-0 and SHIP-TREND-0) at the age of 20-79 years. Audiovestibular symptoms as outcome variables were assessed by structured questionnaires. Additionally, individuals were comprehensively characterized regarding modifiable lifestyle factors as well as cardiovascular and metabolic disorders, allowing the assessment of their role as exposure variables. We calculated a weighted prevalence of 14.2% for hearing loss, 9.7% for tinnitus, and 13.5% for dizziness in the population. Prevalence increased with age and differed among the sexes. A considerable share of 28.0% of the investigated individuals reported more than one symptom at once. The prevalence of hearing loss as well as tinnitus increased between the two cohorts. A moderate positive correlation was found between the occurrence of hearing loss and tinnitus (phi-coefficient 0.318). In multivariable regression analyses, education was identified as a significant protective factor while only smoking was significantly associated with all three symptoms. Furthermore, several cardiovascular risk factors contributed to both hearing loss and dizziness. In conclusion, audiovestibular symptoms are highly prevalent in the investigated population. A considerable but complex influence of risk factors points towards a relation with neuronal as well as cardiovascular disease processes. To clarify the underlying mechanisms, the interaction between the senses of hearing and balance as well as the mode of action of the risk factors should be evaluated in more detail in the future.
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Affiliation(s)
- Friedrich Ihler
- Department of Otorhinolaryngology, Head and Neck Surgery, Greifswald University Medicine, Fleischmannstrasse 8, 17475, Greifswald, Germany.
| | - Tina Brzoska
- Department of Otorhinolaryngology, Head and Neck Surgery, Greifswald University Medicine, Fleischmannstrasse 8, 17475, Greifswald, Germany
| | - Reyhan Altindal
- Department of Otorhinolaryngology, Head and Neck Surgery, Greifswald University Medicine, Fleischmannstrasse 8, 17475, Greifswald, Germany
| | - Oliver Dziemba
- Department of Otorhinolaryngology, Head and Neck Surgery, Greifswald University Medicine, Fleischmannstrasse 8, 17475, Greifswald, Germany
| | - Henry Völzke
- Institute for Community Medicine, University Medicine Greifswald, 17475, Greifswald, Germany
| | - Chia-Jung Busch
- Department of Otorhinolaryngology, Head and Neck Surgery, Greifswald University Medicine, Fleischmannstrasse 8, 17475, Greifswald, Germany
| | - Till Ittermann
- Institute for Community Medicine, University Medicine Greifswald, 17475, Greifswald, Germany
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3
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Alshehri S, Alahmari KA. Evaluating the impact of COVID-19 on vertigo and hearing impairment: A post-recovery analysis. Medicine (Baltimore) 2024; 103:e38819. [PMID: 38968457 PMCID: PMC11224820 DOI: 10.1097/md.0000000000038819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 06/13/2024] [Indexed: 07/07/2024] Open
Abstract
The COVID-19 pandemic, caused by the novel coronavirus SARS-CoV-2, has manifested with respiratory symptoms and a spectrum of extra-pulmonary complications. Emerging evidence suggests potential impacts on the auditory and vestibular systems, but the extent and nature of these effects in recovered individuals remain unclear. This study aimed to investigate the prevalence and severity of vertigo and hearing impairment in individuals who have recovered from COVID-19 and to identify potential risk factors associated with these sensory symptoms. A cohort of 250 recovered COVID-19 patients was assessed. Standardized questionnaires, including the Dizziness Handicap Inventory and the Vertigo Symptom Scale, were used to evaluate vertigo. Hearing assessment was conducted using pure-tone audiometry, speech audiometry, tympanometry, and oto-acoustic emissions testing. Logistic regression analysis was performed to assess the association between COVID-19 severity and the occurrence of sensory symptoms, controlling for confounding variables such as age and comorbidities. Of the participants, 10% reported vertigo, varying severity. Hearing assessments revealed that most participants had normal hearing, with an average speech discrimination score of 94.6. Logistic regression analysis indicated a significant association between severe COVID-19 and an increased likelihood of vertigo (OR 2.11, 95% CI 1.02-4.35, P = .043) and hearing impairment (OR 3.29, 95% CI 1.60-6.78, P = .002). This study suggests a significant association between COVID-19 severity and vertigo and hearing impairment prevalence. The findings underscore the importance of sensory symptom assessment in the post-recovery phase of COVID-19, highlighting the need for comprehensive healthcare approaches to manage long-term sequelae.
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Affiliation(s)
- Sarah Alshehri
- Otology and Neurotology, Department of Surgery, College of Medicine, King Khalid University, Abha, Saudi Arabia
| | - Khalid A. Alahmari
- Medical Rehabilitation Sciences, College of Applied Medical Sciences, King Khalid University, Abha, Saudi Arabia
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4
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Wang T, Ling AH, Billings SE, Hosseini DK, Vaisbuch Y, Kim GS, Atkinson PJ, Sayyid ZN, Aaron KA, Wagh D, Pham N, Scheibinger M, Zhou R, Ishiyama A, Moore LS, Maria PS, Blevins NH, Jackler RK, Alyono JC, Kveton J, Navaratnam D, Heller S, Lopez IA, Grillet N, Jan TA, Cheng AG. Single-cell transcriptomic atlas reveals increased regeneration in diseased human inner ear balance organs. Nat Commun 2024; 15:4833. [PMID: 38844821 PMCID: PMC11156867 DOI: 10.1038/s41467-024-48491-y] [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: 11/21/2022] [Accepted: 04/29/2024] [Indexed: 06/09/2024] Open
Abstract
Mammalian inner ear hair cell loss leads to permanent hearing and balance dysfunction. In contrast to the cochlea, vestibular hair cells of the murine utricle have some regenerative capacity. Whether human utricular hair cells regenerate in vivo remains unknown. Here we procured live, mature utricles from organ donors and vestibular schwannoma patients, and present a validated single-cell transcriptomic atlas at unprecedented resolution. We describe markers of 13 sensory and non-sensory cell types, with partial overlap and correlation between transcriptomes of human and mouse hair cells and supporting cells. We further uncover transcriptomes unique to hair cell precursors, which are unexpectedly 14-fold more abundant in vestibular schwannoma utricles, demonstrating the existence of ongoing regeneration in humans. Lastly, supporting cell-to-hair cell trajectory analysis revealed 5 distinct patterns of dynamic gene expression and associated pathways, including Wnt and IGF-1 signaling. Our dataset constitutes a foundational resource, accessible via a web-based interface, serving to advance knowledge of the normal and diseased human inner ear.
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Affiliation(s)
- Tian Wang
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
- Department of Otolaryngology - Head and Neck Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan Province, 410011, PR China
| | - Angela H Ling
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
- Department of Otolaryngology - Head and Neck Surgery, Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - Sara E Billings
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Davood K Hosseini
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Yona Vaisbuch
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Grace S Kim
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Patrick J Atkinson
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Zahra N Sayyid
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Ksenia A Aaron
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Dhananjay Wagh
- Stanford Genomics Facility, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Nicole Pham
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Mirko Scheibinger
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Ruiqi Zhou
- Department of Otolaryngology - Head and Neck Surgery, Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, TN, 37232, USA
| | - Akira Ishiyama
- Department of Head and Neck Surgery, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Lindsay S Moore
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Peter Santa Maria
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Nikolas H Blevins
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Robert K Jackler
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Jennifer C Alyono
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - John Kveton
- Department of Surgery, Yale University School of Medicine, New Haven, CT, 06510, USA
| | - Dhasakumar Navaratnam
- Department of Surgery, Yale University School of Medicine, New Haven, CT, 06510, USA
- Department of Neurology, Yale University School of Medicine, New Haven, CT, 06510, USA
| | - Stefan Heller
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Ivan A Lopez
- Department of Head and Neck Surgery, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Nicolas Grillet
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA
| | - Taha A Jan
- Department of Otolaryngology - Head and Neck Surgery, Epithelial Biology Center, Vanderbilt University Medical Center, Nashville, TN, 37232, USA.
| | - Alan G Cheng
- Department of Otolaryngology - Head and Neck Surgery, Stanford University School of Medicine, Stanford, CA, 94305, USA.
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5
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Mendia C, Peineau T, Zamani M, Felgerolle C, Yahiaoui N, Christophersen N, Papal S, Maudoux A, Maroofian R, Patni P, Nouaille S, Bowl MR, Delmaghani S, Galehdari H, Vona B, Dulon D, Vitry S, El-Amraoui A. Clarin-2 gene supplementation durably preserves hearing in a model of progressive hearing loss. Mol Ther 2024; 32:800-817. [PMID: 38243601 PMCID: PMC10928142 DOI: 10.1016/j.ymthe.2024.01.021] [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: 10/20/2023] [Revised: 12/22/2023] [Accepted: 01/12/2024] [Indexed: 01/21/2024] Open
Abstract
Hearing loss is a major health concern affecting millions of people worldwide with currently limited treatment options. In clarin-2-deficient Clrn2-/- mice, used here as a model of progressive hearing loss, we report synaptic auditory abnormalities in addition to the previously demonstrated defects of hair bundle structure and mechanoelectrical transduction. We sought an in-depth evaluation of viral-mediated gene delivery as a therapy for these hearing-impaired mice. Supplementation with either the murine Clrn2 or human CLRN2 genes preserved normal hearing in treated Clrn2-/- mice. Conversely, mutated forms of CLRN2, identified in patients with post-lingual moderate to severe hearing loss, failed to prevent hearing loss. The ectopic expression of clarin-2 successfully prevented the loss of stereocilia, maintained normal mechanoelectrical transduction, preserved inner hair cell synaptic function, and ensured near-normal hearing thresholds over time. Maximal hearing preservation was observed when Clrn2 was delivered prior to the loss of transducing stereocilia. Our findings demonstrate that gene therapy is effective for the treatment of post-lingual hearing impairment and age-related deafness associated with CLRN2 patient mutations.
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Affiliation(s)
- Clara Mendia
- Institut Pasteur, Université Paris Cité, INSERM AO06, Institut de l'Audition, Unit Progressive Sensory Disorders, Pathophysiology and Therapy, 63 rue de Charenton, 75012 Paris, France; Sorbonne Université, Collège Doctoral, 75005 Paris, France
| | - Thibault Peineau
- Institut de l'Audition and Université de Bordeaux, Laboratoire de Neurophysiologie de la Synapse Auditive, Bordeaux Neurocampus, 33076 Bordeaux, France
| | - Mina Zamani
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz 6135783151, Iran
| | - Chloé Felgerolle
- Institut Pasteur, Université Paris Cité, INSERM AO06, Institut de l'Audition, Unit Progressive Sensory Disorders, Pathophysiology and Therapy, 63 rue de Charenton, 75012 Paris, France
| | - Nawal Yahiaoui
- Institut Pasteur, Université Paris Cité, INSERM AO06, Institut de l'Audition, Unit Progressive Sensory Disorders, Pathophysiology and Therapy, 63 rue de Charenton, 75012 Paris, France
| | - Nele Christophersen
- Institute for Auditory Neuroscience and InnerEarLab, University Medical Center Göttingen, 37075 Göttingen, Germany; Institute of Human Genetics, University Medical Center Göttingen, 37075 Göttingen, Germany
| | - Samantha Papal
- Institut Pasteur, Université Paris Cité, INSERM AO06, Institut de l'Audition, Unit Progressive Sensory Disorders, Pathophysiology and Therapy, 63 rue de Charenton, 75012 Paris, France
| | - Audrey Maudoux
- Institut Pasteur, Université Paris Cité, INSERM AO06, Institut de l'Audition, Unit Progressive Sensory Disorders, Pathophysiology and Therapy, 63 rue de Charenton, 75012 Paris, France
| | - Reza Maroofian
- Department of Neuromuscular Diseases, UCL Queen Square Institute of Neurology, University College London, WC1E 6BT London, UK
| | - Pranav Patni
- Institut Pasteur, Université Paris Cité, INSERM AO06, Institut de l'Audition, Unit Progressive Sensory Disorders, Pathophysiology and Therapy, 63 rue de Charenton, 75012 Paris, France
| | - Sylvie Nouaille
- Institut Pasteur, Université Paris Cité, INSERM AO06, Institut de l'Audition, Unit Progressive Sensory Disorders, Pathophysiology and Therapy, 63 rue de Charenton, 75012 Paris, France
| | - Michael R Bowl
- UCL Ear Institute, University College London, 332 Gray's Inn Road, WC1X 8EE London, UK
| | - Sedigheh Delmaghani
- Institut Pasteur, Université Paris Cité, INSERM AO06, Institut de l'Audition, Unit Progressive Sensory Disorders, Pathophysiology and Therapy, 63 rue de Charenton, 75012 Paris, France
| | - Hamid Galehdari
- Department of Biology, Faculty of Science, Shahid Chamran University of Ahvaz, Ahvaz 6135783151, Iran
| | - Barbara Vona
- Institute for Auditory Neuroscience and InnerEarLab, University Medical Center Göttingen, 37075 Göttingen, Germany; Institute of Human Genetics, University Medical Center Göttingen, 37075 Göttingen, Germany
| | - Didier Dulon
- Institut de l'Audition and Université de Bordeaux, Laboratoire de Neurophysiologie de la Synapse Auditive, Bordeaux Neurocampus, 33076 Bordeaux, France
| | - Sandrine Vitry
- Institut Pasteur, Université Paris Cité, INSERM AO06, Institut de l'Audition, Unit Progressive Sensory Disorders, Pathophysiology and Therapy, 63 rue de Charenton, 75012 Paris, France.
| | - Aziz El-Amraoui
- Institut Pasteur, Université Paris Cité, INSERM AO06, Institut de l'Audition, Unit Progressive Sensory Disorders, Pathophysiology and Therapy, 63 rue de Charenton, 75012 Paris, France.
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Morel G, Ernest S, Serey-Gaut M, Jonard L, Balogoun AR, Parodi M, Loundon N, Achard S, Marlin S. RIPOR2: A new gene of non-syndromic cochleovestibular dysfunction, discrepancy between human pathology and animal models. Clin Genet 2023; 104:669-673. [PMID: 37864412 DOI: 10.1111/cge.14436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2023] [Revised: 09/22/2023] [Accepted: 09/28/2023] [Indexed: 10/22/2023]
Abstract
Cochleovestibular dysfunctions are rare conditions misrecognized. A homozygous pathogenic variation c.1561C > T (p.Arg521*) in RIPOR2 (RHO family interacting cell polarization regulator 2) has been identified by WES in Tunisian siblings suffering from congenital bilateral profound hearing and vestibular dysfunctions. In contrast to the vestibular areflexia observed in our patients, deaf Ripor2 KO mouse model and our zebrafish model have normal vestibular function.
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Affiliation(s)
- Godelieve Morel
- Centre de Référence «Surdités Génétiques», Fédération de Génétique; Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
- Service de Génétique Médicale, CHU Felix Guyon, France
| | - Sylvain Ernest
- Laboratory of Embryology and Genetics of Malformations, Imagine Institute, INSERM UMR 1163, Université de Paris, Paris, France
| | - Margaux Serey-Gaut
- Centre de Référence «Surdités Génétiques», Fédération de Génétique; Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
- Centre de Recherche en Audiologie (CREA), Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Laurence Jonard
- Centre de Référence «Surdités Génétiques», Fédération de Génétique; Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
- Centre de Recherche en Audiologie (CREA), Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Abeke Ralyath Balogoun
- Centre de Référence «Surdités Génétiques», Fédération de Génétique; Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
- Centre de Recherche en Audiologie (CREA), Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Marine Parodi
- Service d'ORL Pédiatrique et de Chirurgie Cervico-Faciale, Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Natalie Loundon
- Centre de Référence «Surdités Génétiques», Fédération de Génétique; Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
- Centre de Recherche en Audiologie (CREA), Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
- Service d'ORL Pédiatrique et de Chirurgie Cervico-Faciale, Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Sophie Achard
- Centre de Référence «Surdités Génétiques», Fédération de Génétique; Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
- Service d'ORL Pédiatrique et de Chirurgie Cervico-Faciale, Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
| | - Sandrine Marlin
- Centre de Référence «Surdités Génétiques», Fédération de Génétique; Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
- Laboratory of Embryology and Genetics of Malformations, Imagine Institute, INSERM UMR 1163, Université de Paris, Paris, France
- Centre de Recherche en Audiologie (CREA), Hôpital Necker-Enfants Malades, Assistance Publique Hôpitaux de Paris, Paris, France
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7
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Cortada M, Levano S, Hall MN, Bodmer D. mTORC2 regulates auditory hair cell structure and function. iScience 2023; 26:107687. [PMID: 37694145 PMCID: PMC10484995 DOI: 10.1016/j.isci.2023.107687] [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: 03/30/2023] [Revised: 07/14/2023] [Accepted: 08/17/2023] [Indexed: 09/12/2023] Open
Abstract
mTOR broadly controls cell growth, but little is known about the role of mTOR complex 2 (mTORC2) in the inner ear. To investigate the role of mTORC2 in sensory hair cells (HCs), we generated HC-specific Rictor knockout (HC-RicKO) mice. HC-RicKO mice exhibited early-onset, progressive, and profound hearing loss. Increased DPOAE thresholds indicated outer HC dysfunction. HCs are lost, but this occurs after hearing loss. Ultrastructural analysis revealed stunted and absent stereocilia in outer HCs. In inner HCs, the number of synapses was significantly decreased and the remaining synapses displayed a disrupted actin cytoskeleton and disorganized Ca2+ channels. Thus, the mTORC2 signaling pathway plays an important role in regulating auditory HC structure and function via regulation of the actin cytoskeleton. These results provide molecular insights on a central regulator of cochlear HCs and thus hearing.
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Affiliation(s)
- Maurizio Cortada
- Department of Biomedicine, University of Basel, CH-4031 Basel, Switzerland
| | - Soledad Levano
- Department of Biomedicine, University of Basel, CH-4031 Basel, Switzerland
| | | | - Daniel Bodmer
- Department of Biomedicine, University of Basel, CH-4031 Basel, Switzerland
- Clinic for Otorhinolaryngology, Head and Neck Surgery, University of Basel Hospital, CH-4031 Basel, Switzerland
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8
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Rodríguez-Villalba R, Caballero-Borrego M. Normative values for the video Head Impulse Test in children without otoneurologic symptoms and their evolution across childhood by gender. Eur Arch Otorhinolaryngol 2023; 280:4037-4043. [PMID: 36892616 PMCID: PMC10382384 DOI: 10.1007/s00405-023-07900-6] [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: 11/30/2022] [Accepted: 02/22/2023] [Indexed: 03/10/2023]
Abstract
PURPOSE The video Head Impulse Test is routinely used to assess semicircular canal function in adults, but to date, pediatric reference values are scarce. This study aimed to explore the vestibulo-ocular reflex (VOR) in healthy children at different development stages and to compare the obtained gain values with reference to those in an adult population. METHODS This prospective, single-center study recruited 187 children from among patients without otoneurological diseases, healthy relatives of these patients, and staff families from a tertiary hospital. Patients were divided into three groups by age: 3-6 years, 7-10 years, and 11-16 years. The vestibulo-ocular reflex was assessed by video Head Impulse Test, using a device with a high-speed infrared camera and accelerometer (EyeSeeCam®; Interacoustics, Denmark). RESULTS We found a lower vestibulo-ocular reflex gain of both horizontal canals in the 3-6-year-old group when compared with the other age groups. No increasing trend was found in the horizontal canals from age 7-10 years to age 11-16 years, and no differences were found by sex. CONCLUSION Gain values in the horizontal canals increased with age until children reached age 7-10 years and matched the normal values for adults.
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Affiliation(s)
- Rosana Rodríguez-Villalba
- Department of Otorhinolaryngology, Hospital Sant Joan de Déu, Barcelona, Spain
- Department of Otorhinolaryngology, Althaia Xarxa Assistencial Universitària de Manresa, Manresa, Spain
| | - Miguel Caballero-Borrego
- Otorhinolaryngology-Head and Neck Surgery Department, Hospital Clínic, University of Barcelona, C/Villarroel, 170, Esc. 8, 2ª, 08036, Barcelona, Spain.
- Institut d'Investigacions Biomèdiques Agusti Pi Sunyer (IDIBAPS), University of Barcelona, Barcelona, Spain.
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Coudert A, Parodi M, Denoyelle F, Maudoux A, Loundon N, Simon F. Paediatric vestibular assessment in French cochlear implant centres: Challenges and improvement areas. Int J Pediatr Otorhinolaryngol 2023; 171:111651. [PMID: 37454475 DOI: 10.1016/j.ijporl.2023.111651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2023] [Revised: 07/02/2023] [Accepted: 07/08/2023] [Indexed: 07/18/2023]
Abstract
OBJECTIVE Survey of paediatric vestibular activity in all 30 French paediatric cochlear implant (CI) centres to identify challenges and areas of improvement. METHOD All 30 French CI centres answered a 29-question questionnaire about their paediatric vestibular activity, equipment, and management in different clinical situations (e.g. vestibular assessment before a cochlear implantation or in cases of vertigo) at different ages. RESULTS Eighteen CI centres had dedicated paediatric vestibular clinics and 12 did not. Minimum age required for vestibular testing was 3 years in eight centres. Four vestibular tests stood out: caloric tests, video Head Impulse Test (vHIT), rotating chair, vestibular evoked myogenic potentials (VEMP). Depending on the centre's experience, the use of vestibular tests in clinical routine was very heterogeneous. Expert centres mostly used vHIT and cervical VEMP (in bone conduction) for assessments before the first cochlear implantation in 1-year-old children. Dizziness assessment in 4-year children was based on the use of vHIT, cervical VEMP on bone conduction, rotatory test, and caloric test. Ocular VEMP was rarely used. CONCLUSIONS Paediatric vestibular assessment requires specific expertise compared to adults. Due to a lack of specialised human resources, some centres may be unable to follow French paediatric CI guidelines. International recommendations could help standardise paediatric vestibular management and public health policies should be discussed to improve training and access for children.
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Affiliation(s)
- A Coudert
- Department of Paediatric Otolaryngology-Head & Neck Surgery, Femme Mere Enfant Hospital, Hospices Civils de Lyon, Lyon, France; University of Lyon 1, Lyon, France.
| | - M Parodi
- Department of Paediatric Otolaryngology-Head & Neck Surgery, AP-HP, Necker-Enfants Malades, F-75015, Paris, France
| | - F Denoyelle
- Department of Paediatric Otolaryngology-Head & Neck Surgery, AP-HP, Necker-Enfants Malades, F-75015, Paris, France; Université Paris Cité, F-75006, Paris, France
| | - A Maudoux
- Université Paris Cité, F-75006, Paris, France; Department of Pediatric Otolaryngology-Head & Neck Surgery, AP-HP, Robert-Debré Hospital, Paris, France
| | - N Loundon
- Department of Paediatric Otolaryngology-Head & Neck Surgery, AP-HP, Necker-Enfants Malades, F-75015, Paris, France
| | - F Simon
- Department of Paediatric Otolaryngology-Head & Neck Surgery, AP-HP, Necker-Enfants Malades, F-75015, Paris, France; Université Paris Cité, F-75006, Paris, France
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Brancaleone MP, Talarico MK, Boucher LC, Yang J, Merfeld D, Onate JA. Hearing Status and Static Postural Control of Collegiate Athletes. J Athl Train 2023; 58:452-457. [PMID: 35984719 PMCID: PMC11220902 DOI: 10.4085/1062-6050-0262.22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
CONTEXT Because of the close proximity of the cochlea, vestibular apparatus, and shared neurovascular structures, the static postural control of athletes who are deaf or hard of hearing (D/HoH) may be different from that of athletes who are hearing. Limited research is available to quantify differences between these athletes. OBJECTIVE To determine the effect of hearing status and stance condition on the static postural control of athletes. DESIGN Cross-sectional study. SETTING Athletic training facilities. PATIENTS OR OTHER PARTICIPANTS Fifty-five collegiate varsity athletes who were D/HoH (age = 20.62 ± 1.80 years, height = 1.73 ± 0.08 m, mass = 80.34 ± 18.92 kg) and 100 university club athletes who were hearing (age = 20.11 ± 1.59 years, height = 1.76 ± 0.09 m, mass = 77.66 ± 14.37 kg). MAIN OUTCOME MEASURE(S) Participants completed the Modified Clinical Test of Sensory Interaction and Balance on a triaxial force plate. Anteroposterior and mediolateral (ML) center-of-pressure (CoP) velocity, anteroposterior and ML CoP amplitude root mean square, and 95% ellipse sway area were calculated. RESULTS Athletes who were D/HoH had a larger CoP velocity, larger ML root mean square, and larger sway area than those who were hearing (P values < .01). A significant main effect of stance condition was observed for all postural control variables (P values < .01). CONCLUSIONS During the Modified Clinical Test of Sensory Interaction and Balance, athletes who were D/HoH demonstrated a larger sway area compared with athletes who were hearing. Therefore, individualized baseline assessments of static postural control may be warranted for athletes who are D/HoH as opposed to comparisons with existing normative data.
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Affiliation(s)
| | - Maria K. Talarico
- DEVCOM Analysis Center, Human Systems Integration Division–Weapons Branch, US Army Futures Command, Aberdeen Proving Ground, MD
| | - Laura C. Boucher
- School of Health and Rehabilitation Sciences, The Ohio State University, Columbus
- Jameson Crane Sports Medicine Institute, The Ohio State University, Columbus
| | - Jingzhen Yang
- Center for Injury Research and Policy, The Abigail Wexner Research Institute at Nationwide Children's Hospital, Columbus, OH
| | - Daniel Merfeld
- School of Health and Rehabilitation Sciences, The Ohio State University, Columbus
- Department of Otolaryngology–Head and Neck Surgery, The Ohio State University, Columbus
| | - James A. Onate
- School of Health and Rehabilitation Sciences, The Ohio State University, Columbus
- Jameson Crane Sports Medicine Institute, The Ohio State University, Columbus
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