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Maroto AF, Borrajo M, Prades S, Callejo À, Amilibia E, Pérez-Grau M, Roca-Ribas F, Castellanos E, Barrallo-Gimeno A, Llorens J. The vestibular calyceal junction is dismantled following subchronic streptomycin in rats and sensory epithelium stress in humans. Arch Toxicol 2023; 97:1943-1961. [PMID: 37195449 PMCID: PMC10256663 DOI: 10.1007/s00204-023-03518-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2023] [Accepted: 05/04/2023] [Indexed: 05/18/2023]
Abstract
Hair cell (HC) loss by epithelial extrusion has been described to occur in the rodent vestibular system during chronic 3,3'-iminodipropionitrile (IDPN) ototoxicity. This is preceded by dismantlement of the calyceal junction in the contact between type I HC (HCI) and calyx afferent terminals. Here, we evaluated whether these phenomena have wider significance. First, we studied rats receiving seven different doses of streptomycin, ranging from 100 to 800 mg/kg/day, for 3-8 weeks. Streptomycin caused loss of vestibular function associated with partial loss of HCI and decreased expression of contactin-associated protein (CASPR1), denoting calyceal junction dismantlement, in the calyces encasing the surviving HCI. Additional molecular and ultrastructural data supported the conclusion that HC-calyx detachment precede HCI loss by extrusion. Animals allowed to survive after the treatment showed functional recuperation and rebuilding of the calyceal junction. Second, we evaluated human sensory epithelia obtained during therapeutic labyrinthectomies and trans-labyrinthine tumour excisions. Some samples showed abnormal CASPR1 label strongly suggestive of calyceal junction dismantlement. Therefore, reversible dismantlement of the vestibular calyceal junction may be a common response triggered by chronic stress, including ototoxic stress, before HCI loss. This may partly explain clinical observations of reversion in function loss after aminoglycoside exposure.
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Affiliation(s)
- Alberto F. Maroto
- Departament de Ciències Fisiològiques, Universitat de Barcelona (UB), Feixa Llarga s/n, 08907 L’Hospitalet de Llobregat, Catalunya Spain
- Institut de Neurociènces, Universitat de Barcelona (UB), Barcelona, Catalunya Spain
- Institut d’Investigació Biomèdica de Bellvitge (IDIBELL), 08907 L’Hospitalet de Llobregat, Catalunya Spain
| | - Mireia Borrajo
- Departament de Ciències Fisiològiques, Universitat de Barcelona (UB), Feixa Llarga s/n, 08907 L’Hospitalet de Llobregat, Catalunya Spain
- Institut de Neurociènces, Universitat de Barcelona (UB), Barcelona, Catalunya Spain
- Institut d’Investigació Biomèdica de Bellvitge (IDIBELL), 08907 L’Hospitalet de Llobregat, Catalunya Spain
| | - Sílvia Prades
- Departament de Ciències Fisiològiques, Universitat de Barcelona (UB), Feixa Llarga s/n, 08907 L’Hospitalet de Llobregat, Catalunya Spain
| | - Àngela Callejo
- Servei d’Otorinolaringologia, Hospital Universitari Germans Trias i Pujol, Badalona, Catalunya Spain
- CSUR Phakomatoses Multidisciplinary Clinics HUGTIP-ICO-IGTP, Barcelona, Catalunya Spain
| | - Emilio Amilibia
- Servei d’Otorinolaringologia, Hospital Universitari Germans Trias i Pujol, Badalona, Catalunya Spain
- CSUR Phakomatoses Multidisciplinary Clinics HUGTIP-ICO-IGTP, Barcelona, Catalunya Spain
| | - Marta Pérez-Grau
- Servei d’Otorinolaringologia, Hospital Universitari Germans Trias i Pujol, Badalona, Catalunya Spain
- CSUR Phakomatoses Multidisciplinary Clinics HUGTIP-ICO-IGTP, Barcelona, Catalunya Spain
| | - Francesc Roca-Ribas
- Servei d’Otorinolaringologia, Hospital Universitari Germans Trias i Pujol, Badalona, Catalunya Spain
- CSUR Phakomatoses Multidisciplinary Clinics HUGTIP-ICO-IGTP, Barcelona, Catalunya Spain
| | - Elisabeth Castellanos
- CSUR Phakomatoses Multidisciplinary Clinics HUGTIP-ICO-IGTP, Barcelona, Catalunya Spain
- Clinical Genomics Research Group, Institut de Recerca Germans Trias i Pujol (IGTP), Badalona, Catalunya Spain
| | - Alejandro Barrallo-Gimeno
- Departament de Ciències Fisiològiques, Universitat de Barcelona (UB), Feixa Llarga s/n, 08907 L’Hospitalet de Llobregat, Catalunya Spain
- Institut de Neurociènces, Universitat de Barcelona (UB), Barcelona, Catalunya Spain
- Institut d’Investigació Biomèdica de Bellvitge (IDIBELL), 08907 L’Hospitalet de Llobregat, Catalunya Spain
| | - Jordi Llorens
- Departament de Ciències Fisiològiques, Universitat de Barcelona (UB), Feixa Llarga s/n, 08907 L’Hospitalet de Llobregat, Catalunya Spain
- Institut de Neurociènces, Universitat de Barcelona (UB), Barcelona, Catalunya Spain
- Institut d’Investigació Biomèdica de Bellvitge (IDIBELL), 08907 L’Hospitalet de Llobregat, Catalunya Spain
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2
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Giese APJ, Weng WH, Kindt KS, Chang HHV, Montgomery JS, Ratzan EM, Beirl AJ, Rivera RA, Lotthammer JM, Walujkar S, Foster MP, Zobeiri OA, Holt JR, Riazuddin S, Cullen KE, Sotomayor M, Ahmed ZM. Complexes of vertebrate TMC1/2 and CIB2/3 proteins form hair-cell mechanotransduction cation channels. bioRxiv 2023:2023.05.26.542533. [PMID: 37398045 PMCID: PMC10312449 DOI: 10.1101/2023.05.26.542533] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/04/2023]
Abstract
Calcium and integrin-binding protein 2 (CIB2) and CIB3 bind to transmembrane channel-like 1 (TMC1) and TMC2, the pore-forming subunits of the inner-ear mechanoelectrical transduction (MET) apparatus. Whether these interactions are functionally relevant across mechanosensory organs and vertebrate species is unclear. Here we show that both CIB2 and CIB3 can form heteromeric complexes with TMC1 and TMC2 and are integral for MET function in mouse cochlea and vestibular end organs as well as in zebrafish inner ear and lateral line. Our AlphaFold 2 models suggest that vertebrate CIB proteins can simultaneously interact with at least two cytoplasmic domains of TMC1 and TMC2 as validated using nuclear magnetic resonance spectroscopy of TMC1 fragments interacting with CIB2 and CIB3. Molecular dynamics simulations of TMC1/2 complexes with CIB2/3 predict that TMCs are structurally stabilized by CIB proteins to form cation channels. Overall, our work demonstrates that intact CIB2/3 and TMC1/2 complexes are integral to hair-cell MET function in vertebrate mechanosensory epithelia.
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Affiliation(s)
- Arnaud P J Giese
- Department of Otorhinolaryngology - Head & Neck Surgery, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Wei-Hsiang Weng
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA
- Biophysics Graduate Program, The Ohio State University, Columbus, OH, USA
| | - Katie S Kindt
- Section on Sensory Cell Development and Function, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | | | - Jonathan S Montgomery
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA
- Ohio State Biochemistry Program, The Ohio State University, Columbus, OH, USA
| | - Evan M Ratzan
- Departments of Otolaryngology and Neurology, F.M. Kirby Neurobiology Center, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Alisha J Beirl
- Section on Sensory Cell Development and Function, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Roberto Aponte Rivera
- Section on Sensory Cell Development and Function, National Institute on Deafness and Other Communication Disorders, National Institutes of Health, Bethesda, MD, USA
| | - Jeffrey M Lotthammer
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA
| | - Sanket Walujkar
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA
| | - Mark P Foster
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA
- Biophysics Graduate Program, The Ohio State University, Columbus, OH, USA
- Ohio State Biochemistry Program, The Ohio State University, Columbus, OH, USA
| | - Omid A Zobeiri
- Department of Biomedical Engineering, McGill University, Montreal, QC, Canada
| | - Jeffrey R Holt
- Departments of Otolaryngology and Neurology, F.M. Kirby Neurobiology Center, Boston Children's Hospital, Harvard Medical School, Boston, MA, USA
| | - Saima Riazuddin
- Department of Otorhinolaryngology - Head & Neck Surgery, University of Maryland School of Medicine, Baltimore, MD, USA
| | - Kathleen E Cullen
- Departments of Biomedical Engineering, Neuroscience, and Otolaryngology and Head and Neck Surgery, Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Marcos Sotomayor
- Department of Chemistry and Biochemistry, The Ohio State University, Columbus, OH, USA
- Biophysics Graduate Program, The Ohio State University, Columbus, OH, USA
- Ohio State Biochemistry Program, The Ohio State University, Columbus, OH, USA
| | - Zubair M Ahmed
- Department of Otorhinolaryngology - Head & Neck Surgery, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Biochemistry and Molecular Biology, University of Maryland School of Medicine, Baltimore, MD, USA
- Department of Ophthalmology and Visual Sciences, University of Maryland School of Medicine, Baltimore, MD, USA
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Greguske EA, Maroto AF, Borrajo M, Palou A, Gut M, Esteve-Codina A, Barrallo-Gimeno A, Llorens J. Decreased expression of synaptic genes in the vestibular ganglion of rodents following subchronic ototoxic stress. Neurobiol Dis 2023; 182:106134. [PMID: 37100209 DOI: 10.1016/j.nbd.2023.106134] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 04/14/2023] [Accepted: 04/23/2023] [Indexed: 04/28/2023] Open
Abstract
The vestibular ganglion contains primary sensory neurons that are postsynaptic to the transducing hair cells (HC) and project to the central nervous system. Understanding the response of these neurons to HC stress or loss is of great interest as their survival and functional competence will determine the functional outcome of any intervention aiming at repair or regeneration of the HCs. We have shown that subchronic exposure to the ototoxicant 3,3'-iminodipropionitrile (IDPN) in rats and mice causes a reversible detachment and synaptic uncoupling between the HCs and the ganglion neurons. Here, we used this paradigm to study the global changes in gene expression in vestibular ganglia using RNA-seq. Comparative gene ontology and pathway analyses of the data from both model species indicated a robust downregulation of terms related to synapses, including presynaptic and postsynaptic functions. Manual analyses of the most significantly downregulated transcripts identified genes with expressions related to neuronal activity, modulators of neuronal excitability, and transcription factors and receptors that promote neurite growth and differentiation. For choice selected genes, the mRNA expression results were replicated by qRT-PCR, validated spatially by RNA-scope, or were demonstrated to be associated with decreased expression of the corresponding protein. We conjectured that decreased synaptic input or trophic support on the ganglion neurons from the HC was triggering these expression changes. To support this hypothesis, we demonstrated decreased expression of BDNF mRNA in the vestibular epithelium after subchronic ototoxicity and also downregulated expression of similarly identified genes (e.g Etv5, Camk1g, Slc17a6, Nptx2, Spp1) after HC ablation with another ototoxic compound, allylnitrile. We conclude that vestibular ganglion neurons respond to decreased input from HCs by decreasing the strength of all their synaptic contacts, both as postsynaptic and presynaptic players.
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Affiliation(s)
- Erin A Greguske
- Departament de Ciències Fisiològiques, Universitat de Barcelona, Feixa Llarga s/n, 08907 l'Hospitalet de Llobregat, Catalunya, Spain; Institut de Neurociènces, Universitat de Barcelona, Barcelona, Catalunya, Spain; Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), 08907 l'Hospitalet de Llobregat, Catalunya, Spain
| | - Alberto F Maroto
- Departament de Ciències Fisiològiques, Universitat de Barcelona, Feixa Llarga s/n, 08907 l'Hospitalet de Llobregat, Catalunya, Spain; Institut de Neurociènces, Universitat de Barcelona, Barcelona, Catalunya, Spain; Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), 08907 l'Hospitalet de Llobregat, Catalunya, Spain
| | - Mireia Borrajo
- Departament de Ciències Fisiològiques, Universitat de Barcelona, Feixa Llarga s/n, 08907 l'Hospitalet de Llobregat, Catalunya, Spain; Institut de Neurociènces, Universitat de Barcelona, Barcelona, Catalunya, Spain; Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), 08907 l'Hospitalet de Llobregat, Catalunya, Spain.
| | - Aïda Palou
- Departament de Ciències Fisiològiques, Universitat de Barcelona, Feixa Llarga s/n, 08907 l'Hospitalet de Llobregat, Catalunya, Spain; Institut de Neurociènces, Universitat de Barcelona, Barcelona, Catalunya, Spain; Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), 08907 l'Hospitalet de Llobregat, Catalunya, Spain.
| | - Marta Gut
- CNAG-CRG, Centre for Genomic Regulation, Barcelona Institute of Science and Technology (BIST), Barcelona, Spain; Universitat Pompeu Fabra, Barcelona, Spain.
| | - Anna Esteve-Codina
- CNAG-CRG, Centre for Genomic Regulation, Barcelona Institute of Science and Technology (BIST), Barcelona, Spain; Universitat Pompeu Fabra, Barcelona, Spain.
| | - Alejandro Barrallo-Gimeno
- Departament de Ciències Fisiològiques, Universitat de Barcelona, Feixa Llarga s/n, 08907 l'Hospitalet de Llobregat, Catalunya, Spain; Institut de Neurociènces, Universitat de Barcelona, Barcelona, Catalunya, Spain; Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), 08907 l'Hospitalet de Llobregat, Catalunya, Spain.
| | - Jordi Llorens
- Departament de Ciències Fisiològiques, Universitat de Barcelona, Feixa Llarga s/n, 08907 l'Hospitalet de Llobregat, Catalunya, Spain; Institut de Neurociènces, Universitat de Barcelona, Barcelona, Catalunya, Spain; Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), 08907 l'Hospitalet de Llobregat, Catalunya, Spain.
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Ding D, Manohar S, Jiang H, Salvi R. Hydroxypropyl-β-cyclodextrin causes massive damage to the developing auditory and vestibular system. Hear Res 2020; 396:108073. [PMID: 32956992 DOI: 10.1016/j.heares.2020.108073] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 07/03/2020] [Accepted: 08/25/2020] [Indexed: 12/14/2022]
Abstract
2-hydroxypropyl-β-cyclodextrin (HPβCD), a cholesterol chelator used to treat Niemann-Pick C1 (NPC1) lysosomal storage disease, causes hearing loss in mammals by preferentially destroying outer hair cells. Because cholesterol plays an important role in early neural development, we hypothesized that HPβCD would cause more extensive damage to postnatal cochlear and vestibular structures in than adult rats. This hypothesis was tested by administering HPβCD to adult rats and postnatal day 3 (P3) cochlear and vestibular organ cultures. Adult rats treated with HPβCD developed hearing impairment and outer hair cell loss 3-day post-treatment; damage increased with dose from the high frequency base toward the low-frequency apex. The HPβCD-induced histopathologies were more severe and widespread in cochlear and vestibular cultures at P3 than in adults. HPβCD destroyed both outer and inner hair cells, auditory nerve fibers and spiral ganglion neurons as well as type I and type II vestibular hair cells and vestibular ganglion neurons. The early stage of HPβCD damage involved disruption of hair cell mechanotransduction and destruction of stereocilia. HPβCD-mediated apoptosis in P3 cultures was most-strongly initiated by activation of the extrinsic caspase-8 cell death pathway in cochlear and vestibular hair cells and neurons followed by activation of executioner caspase-3. Thus, HPβCD is toxic to all types of postnatal cochlear and vestibular hair cells and neurons in vitro whereas in vivo it only appears to destroy outer hair cells in adult cochleae. The more severe HPβCD-induced damage in postnatal cultures could be due to greater drug bioavailability in vitro and/or greater vulnerability of the developing inner ear.
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Affiliation(s)
- Dalian Ding
- Center for Hearing and Deafness, University at Buffalo, 137 Cary Hall, Buffalo, NY 14214, United States
| | - Senthilvelan Manohar
- Center for Hearing and Deafness, University at Buffalo, 137 Cary Hall, Buffalo, NY 14214, United States
| | - Haiyan Jiang
- Center for Hearing and Deafness, University at Buffalo, 137 Cary Hall, Buffalo, NY 14214, United States
| | - Richard Salvi
- Center for Hearing and Deafness, University at Buffalo, 137 Cary Hall, Buffalo, NY 14214, United States.
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Guo CK. Existence of nicotinic receptors in a subset of type I vestibular hair cells of guinea pigs. Brain Res 2018; 1681:85-90. [PMID: 29294348 DOI: 10.1016/j.brainres.2017.12.038] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2017] [Revised: 11/19/2017] [Accepted: 12/27/2017] [Indexed: 10/18/2022]
Abstract
In mammals, vestibular hair cells (VHCs) are classified as type I and II according to morphological criteria. Acetylcholine (ACh) is identified as the primary efferent neurotransmitter. To date, cholinergic activities have been reported in mammalian type II VHCs, but similar activities in type I VHCs have not been pursued presumably because the body of type I VHCs were suggested to be totally surrounded by afferent nerve calyces. A few reports showed that part of type I VHCs were incompletely surrounded by calyces and received contact from the efferent nerve endings in the mammals studied. The possibility of the expression of cholinergic receptors, their subunit composition, and their function in mammals' type I VHCs are still unclear. In this study, nicotinic responses were investigated by the whole-cell patch clamp technique in isolated type I VHCs of guinea pigs. Of the cells, 7.3% were sensitive to cholinergic agonists and showed an excitatory current at -40 mV which was not sensitive to nifedipine, iberiotoxin (IBTX), and apamin. The main carriers of this current were Na+ and K+. The rank order of activation potency was nicotine > 1,1-dimethyl-4-phenyl-piperazinium (DMPP) > ACh. These nicotinic ACh receptors (nAChRs) were not blocked by strychnine and α-bungarotoxin (α-BTX), but sensitive to d-tubocurarine (dTC) and mecamylamine (Mec). The findings provide physiological evidence that some subtypes of nAChRs may be located in a subset of type I VHCs, which were different from α9α10 nAChRs.
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Affiliation(s)
- Chang-Kai Guo
- Shoujia ENT Hospital, 180 Jiefang Avenue, Qiaokou District, Wuhan 430033, China.
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Monsanto RDC, Schachern P, Paparella MM, Cureoglu S, Penido NDO. Progression of changes in the sensorial elements of the cochlear and peripheral vestibular systems: The otitis media continuum. Hear Res 2017; 351:2-10. [PMID: 28578877 DOI: 10.1016/j.heares.2017.05.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/18/2017] [Revised: 04/10/2017] [Accepted: 05/03/2017] [Indexed: 12/16/2022]
Abstract
Our study aimed to evaluate pathologic changes in the cochlear (inner and outer hair cells and stria vascularis) and vestibular (vestibular hair cells, dark, and transitional cells) sensorial elements in temporal bones from donors who had otitis media. We studied 40 temporal bones from such donors, which were categorized in serous otitis media (SOM), serous-purulent otitis media (SPOM), mucoid/mucoid-purulent otitis media (MOM/MPOM), and chronic otitis media (COM); control group comprised 10 nondiseased temporal bones. We found significant loss of inner and outer cochlear hair cells in the basal turn of the SPOM, MOM/MPOM and COM groups; significant loss of vestibular hair cells was observed in the MOM/MPOM and COM groups. All otitis media groups had smaller mean area of the stria vascularis in the basal turn of the cochlea when compared to controls. In conclusion, our study demonstrated more severe pathologic changes in the later stages of the continuum of otitis media (MOM/MPOM and COM). Those changes seem to progress from the basal turn of the cochlea (stria vascularis, then inner and outer hair cells) to the middle turn of the cochlea and to the saccule and utricle in the MOM/MPOM and COM stages.
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Affiliation(s)
- Rafael da Costa Monsanto
- Department of Otolaryngology, University of Minnesota, 2001 6th St. SE, Lions Research Building, Room 210, Otopathology Laboratory, Minneapolis, MN 55455, USA; Department of Otorhinolaryngology Head and Neck Surgery, Universidade Federal de São Paulo (UNIFESP), Escola Paulista de Medicina, Rua dos Otonis, 700 - Piso Superior - Vila Clementino, São Paulo, SP 04025 002, Brazil
| | - Patricia Schachern
- Department of Otolaryngology, University of Minnesota, 2001 6th St. SE, Lions Research Building, Room 210, Otopathology Laboratory, Minneapolis, MN 55455, USA
| | - Michael M Paparella
- Department of Otolaryngology, University of Minnesota, 2001 6th St. SE, Lions Research Building, Room 210, Otopathology Laboratory, Minneapolis, MN 55455, USA
| | - Sebahattin Cureoglu
- Department of Otolaryngology, University of Minnesota, 2001 6th St. SE, Lions Research Building, Room 210, Otopathology Laboratory, Minneapolis, MN 55455, USA.
| | - Norma de Oliveira Penido
- Department of Otorhinolaryngology Head and Neck Surgery, Universidade Federal de São Paulo (UNIFESP), Escola Paulista de Medicina, Rua dos Otonis, 700 - Piso Superior - Vila Clementino, São Paulo, SP 04025 002, Brazil
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