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Schvartz-Leyzac KC, Colesa DJ, Swiderski DL, Raphael Y, Pfingst BE. Cochlear Health and Cochlear-implant Function. J Assoc Res Otolaryngol 2023; 24:5-29. [PMID: 36600147 PMCID: PMC9971430 DOI: 10.1007/s10162-022-00882-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 11/24/2022] [Indexed: 01/06/2023] Open
Abstract
The cochlear implant (CI) is widely considered to be one of the most innovative and successful neuroprosthetic treatments developed to date. Although outcomes vary, CIs are able to effectively improve hearing in nearly all recipients and can substantially improve speech understanding and quality of life for patients with significant hearing loss. A wealth of research has focused on underlying factors that contribute to success with a CI, and recent evidence suggests that the overall health of the cochlea could potentially play a larger role than previously recognized. This article defines and reviews attributes of cochlear health and describes procedures to evaluate cochlear health in humans and animal models in order to examine the effects of cochlear health on performance with a CI. Lastly, we describe how future biologic approaches can be used to preserve and/or enhance cochlear health in order to maximize performance for individual CI recipients.
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Affiliation(s)
- Kara C Schvartz-Leyzac
- Department of Otolaryngology-Head and Neck Surgery, Michigan Medicine, Kresge Hearing Research Institute, University of Michigan, 1150 Medical Center Drive, Ann Arbor, MI, 48109-5616, USA
- Department of Otolaryngology-Head and Neck Surgery, Medical University of South Carolina, 135 Rutledge Ave, Charleston, SC, 29425, USA
| | - Deborah J Colesa
- Department of Otolaryngology-Head and Neck Surgery, Michigan Medicine, Kresge Hearing Research Institute, University of Michigan, 1150 Medical Center Drive, Ann Arbor, MI, 48109-5616, USA
| | - Donald L Swiderski
- Department of Otolaryngology-Head and Neck Surgery, Michigan Medicine, Kresge Hearing Research Institute, University of Michigan, 1150 Medical Center Drive, Ann Arbor, MI, 48109-5616, USA
| | - Yehoash Raphael
- Department of Otolaryngology-Head and Neck Surgery, Michigan Medicine, Kresge Hearing Research Institute, University of Michigan, 1150 Medical Center Drive, Ann Arbor, MI, 48109-5616, USA
| | - Bryan E Pfingst
- Department of Otolaryngology-Head and Neck Surgery, Michigan Medicine, Kresge Hearing Research Institute, University of Michigan, 1150 Medical Center Drive, Ann Arbor, MI, 48109-5616, USA.
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Lokwani P, Prabhu P, Nisha KV. Profiles and predictors of onset based differences in vocal characteristics of adults with auditory neuropathy spectrum disorder (ANSD). J Otol 2022; 17:218-225. [PMID: 36249919 PMCID: PMC9547112 DOI: 10.1016/j.joto.2022.08.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 07/14/2022] [Accepted: 08/08/2022] [Indexed: 10/25/2022] Open
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A nonsense TMEM43 variant leads to disruption of connexin-linked function and autosomal dominant auditory neuropathy spectrum disorder. Proc Natl Acad Sci U S A 2021; 118:2019681118. [PMID: 34050020 PMCID: PMC8179140 DOI: 10.1073/pnas.2019681118] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Genes that are primarily expressed in cochlear glia-like supporting cells (GLSs) have not been clearly associated with progressive deafness. Herein, we present a deafness locus mapped to chromosome 3p25.1 and an auditory neuropathy spectrum disorder (ANSD) gene, TMEM43, mainly expressed in GLSs. We identify p.(Arg372Ter) of TMEM43 by linkage analysis and exome sequencing in two large Asian families segregating ANSD, which is characterized by inability to discriminate speech despite preserved sensitivity to sound. The knock-in mouse with the p.(Arg372Ter) variant recapitulates a progressive hearing loss with histological abnormalities in GLSs. Mechanistically, TMEM43 interacts with the Connexin26 and Connexin30 gap junction channels, disrupting the passive conductance current in GLSs in a dominant-negative fashion when the p.(Arg372Ter) variant is introduced. Based on these mechanistic insights, cochlear implant was performed on three subjects, and speech discrimination was successfully restored. Our study highlights a pathological role of cochlear GLSs by identifying a deafness gene and its causal relationship with ANSD.
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Eshraghi AA, Polineni SP, Davies C, Shahal D, Mittal J, Al-Zaghal Z, Sinha R, Jindal U, Mittal R. Genotype-Phenotype Correlation for Predicting Cochlear Implant Outcome: Current Challenges and Opportunities. Front Genet 2020; 11:678. [PMID: 32765579 PMCID: PMC7381205 DOI: 10.3389/fgene.2020.00678] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 06/02/2020] [Indexed: 12/13/2022] Open
Abstract
The use and utility of cochlear implantation has rapidly increased in recent years as technological advances in the field have expanded both the efficacy and eligible patient population for implantation. This review aims to serve as a general overview of the most common hearing disorders that have favorable auditory outcomes with cochlear implants (CI). Hearing loss in children caused by congenital cytomegalovirus infection, syndromic conditions including Pendred Syndrome, and non-syndromic genetic conditions such as hearing impairment associated with GJB2 mutations have shown to be successfully managed by CI. Furthermore, cochlear implantation provides the auditory rehabilitation for the most common etiology of hearing loss in adults and age-related hearing loss (ARHL) or presbycusis. However, in some cases, cochlear implantation have been associated with some challenges. Regarding implantation in children, studies have shown that sometimes parents seem to have unrealistic expectations regarding the ability of CI to provide auditory rehabilitation and speech improvement. Given the evidence revealing the beneficial effects of early intervention via CI in individuals with hearing disorders especially hearing loss due to genetic etiology, early auditory and genetic screening efforts may yield better clinical outcomes. There is a need to better understand genotype-phenotype correlations and CI outcome, so that effective genetic counseling and successful treatment strategies can be developed at the appropriate time for hearing impaired individuals.
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Affiliation(s)
- Adrien A. Eshraghi
- Department of Otolaryngology, Miller School of Medicine, University of Miami Hearing Research Laboratory, Miami, FL, United States
- Department of Neurological Surgery, Miller School of Medicine, Miami, FL, United States
- Department of Biomedical Engineering, University of Miami, Coral Gables, FL, United States
| | - Sai P. Polineni
- Department of Otolaryngology, Miller School of Medicine, University of Miami Hearing Research Laboratory, Miami, FL, United States
| | - Camron Davies
- Department of Otolaryngology, Miller School of Medicine, University of Miami Hearing Research Laboratory, Miami, FL, United States
| | - David Shahal
- Department of Otolaryngology, Miller School of Medicine, University of Miami Hearing Research Laboratory, Miami, FL, United States
| | - Jeenu Mittal
- Department of Otolaryngology, Miller School of Medicine, University of Miami Hearing Research Laboratory, Miami, FL, United States
| | - Zaid Al-Zaghal
- Department of Otolaryngology, Miller School of Medicine, University of Miami Hearing Research Laboratory, Miami, FL, United States
| | - Rahul Sinha
- Department of Otolaryngology, Miller School of Medicine, University of Miami Hearing Research Laboratory, Miami, FL, United States
| | - Urmi Jindal
- Department of Otolaryngology, Miller School of Medicine, University of Miami Hearing Research Laboratory, Miami, FL, United States
| | - Rahul Mittal
- Department of Otolaryngology, Miller School of Medicine, University of Miami Hearing Research Laboratory, Miami, FL, United States
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An integrative approach for pediatric auditory neuropathy spectrum disorders: revisiting etiologies and exploring the prognostic utility of auditory steady-state response. Sci Rep 2020; 10:9816. [PMID: 32555439 PMCID: PMC7299968 DOI: 10.1038/s41598-020-66877-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2019] [Accepted: 05/12/2020] [Indexed: 11/22/2022] Open
Abstract
Auditory neuropathy is an important entity in childhood sensorineural hearing loss. Due to diverse etiologies and clinical features, the management is often challenging. This study used an integrative patient-history, audiologic, genetic, and imaging-based approach to investigate the etiologies and audiologic features of 101 children with auditory neuropathy. Etiologically, 48 (47.5%), 16 (15.8%), 11 (10.9%), and 26 (25.7%) children were categorized as having acquired, genetic, cochlear nerve deficiency-related, and indefinite auditory neuropathy, respectively. The most common causes of acquired and genetic auditory neuropathy were prematurity and OTOF mutations, respectively. Patients with acquired auditory neuropathy presented hearing loss earlier (odds ratio, 10.2; 95% confidence interval, 2.2–47.4), whereas patients with genetic auditory neuropathy had higher presence rate of distortion product otoacoustic emissions (odds ratio, 10.7; 95% confidence interval, 1.3–85.4). In patients with different etiologies or pathological sites, moderate to strong correlations (Pearson’s r = 0.51–0.83) were observed between behavioral thresholds and auditory steady-state response thresholds. In conclusion, comprehensive assessments can provide etiological clues in ~75% of the children with auditory neuropathy. Different etiologies are associated with different audiologic features, and auditory steady-state responses might serve as an objective measure for estimating behavioral thresholds.
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Jayagobi PA, Yeoh A, Hee KYM, Sok Bee Lim L, Choo KP, Kun Kiaang HT, Lazaroo D, Daniel LM. Hearing screening outcome in neonatal intensive care unit graduates from a tertiary care centre in Singapore. Child Care Health Dev 2020; 46:104-110. [PMID: 31503354 DOI: 10.1111/cch.12717] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2018] [Revised: 08/30/2019] [Accepted: 09/05/2019] [Indexed: 11/27/2022]
Abstract
BACKGROUND We aimed to analyse the outcome of universal newborn hearing screening (UNHS) and high-risk hearing screening in neonatal intensive care unit (NICU) graduates in a tertiary care unit. METHODS The hearing screen programme comprises a 2-stage automated auditory brainstem response protocol followed by a high-risk hearing screen at 3-6 months. This study is a retrospective study of NICU graduates born between April 2002 and December 2009. Data on hearing screening, audiological assessment, and management were extracted from a computerized data management system (HITRACK). RESULTS Of 100,225 newborn infants, 2.9% were admitted to the NICU during the study period. The overall incidence of hearing loss (HL) of any type/severity was 35/1,000 infants. Of infants with HL, 92.4% had their first automated auditory brainstem response at/before 1 month of corrected age. The incidence of congenital permanent HL identified by the UNHS was 15.4/1,000. The corrected median age of diagnosis was 4.5 months (1-23.5 months). Of 2,552 NICU graduates who passed the UNHS, 75.5% were retested at 3-6 months of life. Twelve infants with permanent late-onset HL were identified, raising the overall incidence of permanent HL to 19.9/1,000; 1.1/1,000 had auditory neuropathy. Of the 92 infants with HL, 89 (96.7%) had multiple risk factors. CONCLUSIONS There is a high incidence of HL in NICU graduates; 22.6% were late in onset. An early rescreen in those who pass the UNHS is a beneficial step for this high risk population.
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Affiliation(s)
| | - Annie Yeoh
- Department of Neonatology, KK Women's and Children's Hospital, Singapore
| | - Karen Y M Hee
- Department of Neonatology, KK Women's and Children's Hospital, Singapore
| | - Lim Sok Bee Lim
- Department of Child Development, KK Women's and Children's Hospital, Singapore
| | - Khoo Poh Choo
- Department of Neonatology, KK Women's and Children's Hospital, Singapore
| | | | - Derek Lazaroo
- Department of Otolaryngology, KK Women's and Children's Hospital, Singapore
| | - Lourdes Mary Daniel
- Department of Child Development, KK Women's and Children's Hospital, Singapore
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Advances in cochlear implantation for hereditary deafness caused by common mutations in deafness genes. JOURNAL OF BIO-X RESEARCH 2019. [DOI: 10.1097/jbr.0000000000000037] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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Sung JKK, Luk BPK, Wong TKC, Thong JF, Wong HT, Tong MCF. Pediatric Auditory Brainstem Implantation: Impact on Audiological Rehabilitation and Tonal Language Development. Audiol Neurootol 2018; 23:126-134. [PMID: 30227389 DOI: 10.1159/000491991] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 07/06/2018] [Indexed: 11/19/2022] Open
Abstract
OBJECTIVE This is a retrospective review of the impact of an Auditory Brainstem Implant (ABI) on the audiological rehabilitation and tonal language development of pediatric patients with prelingual profound deafness in Hong Kong. RESULTS From January 2009 to February 2015, 11 pediatric patients with profound prelingual deafness received an ABI in Hong Kong (age range 1.67-3.75 years). Etiologies included Cochlear Nerve Deficiency in 7, Severe Cochlear Malformations in 2, and Retrocochlear Deafness in 2. All of them were rehabilitated in Cantonese, a dialect of Chinese. Standard pediatric cochlear implant outcome measurements were used in this study that comprised of the 7-Sound Detection, Syllable Identification, Vowel Identification, Consonant Identification, Tone Imitation, Tone Production and Speech Perception Category. Audiological rehabilitation and speech development outcomes were reviewed. Age-matched outcomes of pediatric cochlear implant users were used for comparisons. CONCLUSION Encouraging results of speech development were found, especially with continued use of the ABI. There was considerable variation in outcomes. Children with coexisting developmental and nonauditory cognitive disabilities did not perform as well. Auditory brainstem implantation is a safe and beneficial treatment for profound prelingual deafness in Cantonese-speaking pediatric patients.
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Wang J, Jin L, Chen J, Fang X, Liao Z. Clinical relationship between auditory neuropathy and nervous system diseases. Pak J Med Sci 2018; 33:1495-1500. [PMID: 29492085 PMCID: PMC5768851 DOI: 10.12669/pjms.336.13225] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Objective: To explore the clinical relationship between auditory neuropathy (AN) and nervous system diseases. Methods: A total of 134 AN patients who were treated in our hospital from December 2011 to April 2016 were selected. Then 120 cases (240 ears) with complete data of pure tone audiometry and acoustic immittance test were selected as an AN1 group, which was compared with 30 patients (49 ears) with general sensorineural hearing loss (SHL) in regard to the results of pure tone audiometry and acoustic immittance test. On the other hand, 79 cases (158 ears) of the 134 patients with complete data of DP otoacoustic emission test were selected as an AN2 group, which was compared with 30 normal subjects (60 ears) regarding the results of DP otoacoustic emission test. Results: Increases in the pure-tone hearing threshold by air conduction of AN1 group significantly exceeded those of SHL group at 0.125 and 0.25 kHz (low frequency) (P<0.05). The former group had significantly lower values at 1.0, 2.0 kHz (moderate frequency) and 4.0, 8.0 kHz (high frequency) (P<0.05). Of 134 patients, 14 (19 ears) had evoked V wave upon auditory brainstem response, whereas no waves after I wave were evoked in other tested ears. Distortion product (DP) otoacoustic emissions could all be evoked. AN2 group had significantly higher amplitudes of DP-gram than those of normal control group at 0.5 and 0.7 kHz (low frequency) (P<0.05). Except for three cases of unsteady walking and 10 of dizziness, others did not suffer from typical symptoms of vertigo attack. As to caloric test-induced electronystagmograms, there were 30 bilaterally normal cases (75.0%), one case of left-side semicircular canal paresis (25%) and nine cases of bilateral semicircular canal paresis (22.5%). Four patients with other nervous system diseases were complicated with AN. Other nervous system disorders included three cases of optic nerve atrophy and 7 of lower limb nerve damage. Conclusion: According to characteristic hearing dysfunction, AN may occur in the afferent pathway of acoustic nerve, probably accompanied by the pathological changes of efferent nerve in the olivocochlear system inside the brainstem.
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Affiliation(s)
- Jingbo Wang
- Jingbo Wang, Department of Otorhinolaryngology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, P. R. China
| | - Lanlan Jin
- Lanlan Jin, Department of Otorhinolaryngology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, P. R. China
| | - Jun Chen
- Jun Chen, Department of Otorhinolaryngology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, P. R. China
| | - Xiaobi Fang
- Xiaobi Fang, Department of Otorhinolaryngology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, P. R. China
| | - Zhisu Liao
- Zhisu Liao, Department of Otorhinolaryngology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou 325000, P. R. China
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Ai Y, Xu L, Li L, Li J, Luo J, Wang M, Fan Z, Wang H. The auditory characteristics of children with inner auditory canal stenosis. Acta Otolaryngol 2016; 136:687-91. [PMID: 26981851 DOI: 10.3109/00016489.2016.1152505] [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: 11/13/2022]
Abstract
Conclusions This study shows that the prevalence of auditory neuropathy spectrum disorder (ANSD) in the children with inner auditory canal (IAC) stenosis is much higher than those without IAC stenosis, regardless of whether they have other inner ear anomalies. In addition, the auditory characteristics of ANSD with IAC stenosis are significantly different from those of ANSD without any middle and inner ear malformations. Objectives To describe the auditory characteristics in children with IAC stenosis as well as to examine whether the narrow inner auditory canal is associated with ANSD. Method A total of 21 children, with inner auditory canal stenosis, participated in this study. A series of auditory tests were measured. Meanwhile, a comparative study was conducted on the auditory characteristics of ANSD, based on whether the children were associated with isolated IAC stenosis. Results Wave V in the ABR was not observed in all the patients, while cochlear microphonic (CM) response was detected in 81.1% ears with stenotic IAC. Sixteen of 19 (84.2%) ears with isolated IAC stenosis had CM response present on auditory brainstem responses (ABR) waveforms. There was no significant difference in ANSD characteristics between the children with and without isolated IAC stenosis.
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MESH Headings
- Audiometry
- Child
- Child, Preschool
- Ear, Inner/abnormalities
- Ear, Inner/diagnostic imaging
- Ear, Inner/physiopathology
- Evoked Potentials, Auditory, Brain Stem
- Female
- Hearing
- Hearing Loss, Sensorineural/congenital
- Hearing Loss, Sensorineural/diagnostic imaging
- Hearing Loss, Sensorineural/etiology
- Hearing Loss, Sensorineural/physiopathology
- Humans
- Infant
- Magnetic Resonance Imaging
- Male
- Otoacoustic Emissions, Spontaneous
- Retrospective Studies
- Temporal Bone/diagnostic imaging
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Affiliation(s)
- Yu Ai
- a Otolaryngology-Head and Neck Surgery, Provincial Hospital Affiliated to Shandong University , Jinan , PR China
- b Clinical Auditory Center, Eye & Ear Infirmary of Shandong Provincial Hospital Group , Jinan , PR China
- c Shandong Provincial Key Laboratory of Otology , Jinan , PR China
- d Artificial Auditory Engineering Centre of Shandon Province , Jinan , PR China
| | - Lei Xu
- a Otolaryngology-Head and Neck Surgery, Provincial Hospital Affiliated to Shandong University , Jinan , PR China
- b Clinical Auditory Center, Eye & Ear Infirmary of Shandong Provincial Hospital Group , Jinan , PR China
- c Shandong Provincial Key Laboratory of Otology , Jinan , PR China
- d Artificial Auditory Engineering Centre of Shandon Province , Jinan , PR China
| | - Li Li
- a Otolaryngology-Head and Neck Surgery, Provincial Hospital Affiliated to Shandong University , Jinan , PR China
- c Shandong Provincial Key Laboratory of Otology , Jinan , PR China
| | - Jianfeng Li
- a Otolaryngology-Head and Neck Surgery, Provincial Hospital Affiliated to Shandong University , Jinan , PR China
- c Shandong Provincial Key Laboratory of Otology , Jinan , PR China
| | - Jianfen Luo
- a Otolaryngology-Head and Neck Surgery, Provincial Hospital Affiliated to Shandong University , Jinan , PR China
- b Clinical Auditory Center, Eye & Ear Infirmary of Shandong Provincial Hospital Group , Jinan , PR China
- c Shandong Provincial Key Laboratory of Otology , Jinan , PR China
- d Artificial Auditory Engineering Centre of Shandon Province , Jinan , PR China
| | - Mingming Wang
- a Otolaryngology-Head and Neck Surgery, Provincial Hospital Affiliated to Shandong University , Jinan , PR China
- c Shandong Provincial Key Laboratory of Otology , Jinan , PR China
| | - Zhaomin Fan
- a Otolaryngology-Head and Neck Surgery, Provincial Hospital Affiliated to Shandong University , Jinan , PR China
- c Shandong Provincial Key Laboratory of Otology , Jinan , PR China
- d Artificial Auditory Engineering Centre of Shandon Province , Jinan , PR China
| | - Haibo Wang
- a Otolaryngology-Head and Neck Surgery, Provincial Hospital Affiliated to Shandong University , Jinan , PR China
- c Shandong Provincial Key Laboratory of Otology , Jinan , PR China
- d Artificial Auditory Engineering Centre of Shandon Province , Jinan , PR China
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Zhang QJ, Han B, Lan L, Zong L, Shi W, Wang HY, Xie LY, Wang H, Zhao C, Zhang C, Yin ZF, Wang DY, Petit C, Guan J, Wang QJ. High frequency of OTOF mutations in Chinese infants with congenital auditory neuropathy spectrum disorder. Clin Genet 2016; 90:238-46. [PMID: 26818607 DOI: 10.1111/cge.12744] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2015] [Revised: 01/21/2016] [Accepted: 01/22/2016] [Indexed: 11/30/2022]
Abstract
Auditory neuropathy spectrum disorder (ANSD) is one of the most common diseases leading to hearing and speech communication barriers in infants and young children. The OTOF gene is the first gene identified for autosomal recessive non-syndromic ANSD, and patients with OTOF mutations have shown marked improvement of auditory functions from the cochlear implantation, but the true involvement of OTOF mutations in Chinese ANSD patients is still unknown which precludes the effective management of this disease. Here, we investigated the contribution of OTOF mutations to congenital ANSD patients in China. In all, 37 infants and young Children with ANSD were screened for all the exons of OTOF gene, of them 34 patients had no neonatal risk factors who were considered as congenital ANSD. The clinical manifestation and audiometric features were also investigated and compared in patients with and without OTOF mutations. In all, 14 of these subjects were shown to carry two or three mutant alleles of OTOF with the high frequency of 41.2% in congenital ANSD patients. In total, 15 novel pathogenic mutations and 10 reported mutations were identified. Our results confirmed that mutations in OTOF gene were a major cause of congenital ANSD in China. Identification of OTOF mutations can facilitate diagnosis, clinical intervention and counseling for congenital ANSD.
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Affiliation(s)
- Q-J Zhang
- Department of Otolaryngology/ Head and Neck Surgery, Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
| | - B Han
- Department of Otolaryngology/ Head and Neck Surgery, Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
| | - L Lan
- Department of Otolaryngology/ Head and Neck Surgery, Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
| | - L Zong
- Department of Otolaryngology/ Head and Neck Surgery, Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
| | - W Shi
- Department of Otolaryngology/ Head and Neck Surgery, Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
| | - H-Y Wang
- Department of Otolaryngology/ Head and Neck Surgery, Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
| | - L-Y Xie
- Department of Otolaryngology/ Head and Neck Surgery, Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
| | - H Wang
- Department of Otolaryngology/ Head and Neck Surgery, Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
| | - C Zhao
- Department of Otolaryngology/ Head and Neck Surgery, Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
| | - C Zhang
- Department of Otolaryngology/ Head and Neck Surgery, Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
| | - Z-F Yin
- Department of Otolaryngology/ Head and Neck Surgery, Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
| | - D-Y Wang
- Department of Otolaryngology/ Head and Neck Surgery, Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
| | - C Petit
- Unité de Génétique et Physiologie de l'Audition, Institut Pasteur, Collège de France, Paris, France
| | - J Guan
- Department of Otolaryngology/ Head and Neck Surgery, Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
| | - Q-J Wang
- Department of Otolaryngology/ Head and Neck Surgery, Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Beijing, China
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Understanding auditory neuropathy spectrum disorder: a systematic review in transgenic mouse models. SCIENCE CHINA-LIFE SCIENCES 2016; 59:480-6. [PMID: 26783139 DOI: 10.1007/s11427-015-4985-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 11/03/2015] [Indexed: 01/19/2023]
Abstract
Auditory neuropathy spectrum disorder is a unique group of hearing dysfunctions characterized by preserved outer hair cell function and abnormal neural conduction of the auditory pathway. However, the pathogenic mechanism underlying this disorder is not clear. We therefore performed a systematic review of genetic mouse models with different gene mutations to provide a valuable tool for better understanding of the process and the possible molecular mechanisms. Of the 18 articles retrieved, nine met the required criteria. All biochemical, histological, and electrophysiological results were recorded for each of the mouse models, as was the transgenic technology. This review provides a summary of different mouse models that may play an important role in the diagnosis and management of auditory neuropathy spectrum disorder in the future.
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Abstract
Permanent childhood sensorineural hearing loss, is one of the most common birth defects in developed countries. It is important to identify the aetiology of hearing loss for many reasons, as there may be important health surveillance implications particularly with syndromic causes. Non-syndromic sensorineural hearing loss is a highly heterogeneous genetic condition, meaning that it may be caused by any one of numerous genes, with very few phenotypic distinctions between the different genetic types. This has previously presented significant challenges for genetic testing. However, the introduction of new technologies should enable more comprehensive testing in the future, bringing significant benefits to more affected children and their families.
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Affiliation(s)
- Michael Parker
- Sheffield Clinical Genetics Service, Sheffield Children's Hospital NHS Foundation Trust, Sheffield, South Yorkshire, UK
| | - Maria Bitner-Glindzicz
- UCL Institute of Child Health, Genetics and Genomic Medicine Programme, London, UK North East Thames Regional Genetics Service, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
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15
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Soh LJM, Chan YM. Revisiting Oto-Acoustic Emissions. PROCEEDINGS OF SINGAPORE HEALTHCARE 2015. [DOI: 10.1177/201010581502400204] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Oto-acoustic emissions (OAEs) are an audiometric diagnostic test that allows quick objective measure of hair cell function in the inner ear. It is a reflection of hearing function at the interface of conductive and sensorineural components in the human ear. Unfortunately, it is not commonly used due to the unique expertise and niche equipment required to successfully carry it out. This article is to further shed light about the use of such tests to junior doctors so that such resources can be better utilised. It also reviews the current and possible future applications of OAEs at the frontiers in otology today.
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Affiliation(s)
| | - Yew Meng Chan
- Department of Otorhinolaryngology, Singapore General Hospital, Singapore
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Norrix LW. Hearing Thresholds, Minimum Response Levels, and Cross-Check Measures in Pediatric Audiology. Am J Audiol 2015; 24:137-44. [PMID: 25760246 DOI: 10.1044/2015_aja-14-0095] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2014] [Accepted: 02/15/2015] [Indexed: 11/09/2022] Open
Abstract
PURPOSE Pediatric audiologists must identify hearing loss in a timely manner so that early intervention can be provided. In this article, the methods important for differentiating between a hearing threshold and minimum response level (MRL), important for an accurate diagnosis, are described. METHOD Operant conditioning procedures, used during visual reinforcement audiometry and conditioned play audiometry, are reviewed. Case examples are provided that demonstrate the importance of using evidence-based procedures, evaluating the success of such procedures, and using cross-check measures for interpreting responses as thresholds or MRLs. RESULTS Behavioral-hearing thresholds can be obtained when operant conditioning procedures are successful and cross-check measures corroborate the audiometric results. When MRLs are obtained, cross-check measures are critical in determining the likelihood of hearing loss and making follow-up recommendations. CONCLUSIONS Early diagnosis of hearing loss is important so that intervention can be initiated within critical periods during infant and childhood learning. Accurate diagnosis depends on the audiologist, who must adhere to evidence-based procedures, use cross-check measures, and evaluate the validity of each procedure. Future research and guidelines are needed to examine decision-making processes in pediatric audiology that ensure diagnostic accuracy and timely intervention for infants and children identified with hearing loss.
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Abstract
Permanent childhood sensorineural hearing loss, is one of the most common birth defects in developed countries. It is important to identify the aetiology of hearing loss for many reasons, as there may be important health surveillance implications particularly with syndromic causes. Non-syndromic sensorineural hearing loss is a highly heterogeneous genetic condition, meaning that it may be caused by any one of numerous genes, with very few phenotypic distinctions between the different genetic types. This has previously presented significant challenges for genetic testing. However, the introduction of new technologies should enable more comprehensive testing in the future, bringing significant benefits to more affected children and their families.
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Affiliation(s)
- Michael Parker
- Sheffield Clinical Genetics Service, Sheffield Children's Hospital NHS Foundation Trust, Sheffield, South Yorkshire, UK
| | - Maria Bitner-Glindzicz
- UCL Institute of Child Health, Genetics and Genomic Medicine Programme, London, UK North East Thames Regional Genetics Service, Great Ormond Street Hospital for Children NHS Foundation Trust, London, UK
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Stroebel D, Swanepoel DW. Does parental experience of the diagnosis and intervention process differ for children with auditory neuropathy? Int J Pediatr Otorhinolaryngol 2014; 78:2210-5. [PMID: 25458162 DOI: 10.1016/j.ijporl.2014.10.015] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Revised: 10/05/2014] [Accepted: 10/10/2014] [Indexed: 11/17/2022]
Abstract
OBJECTIVES This study compared parental experience of the audiological diagnosis and intervention process in children with auditory neuropathy spectrum disorder and sensory neural hearing loss. METHODS A matched group survey was used with parents of children with auditory neuropathy spectrum disorder (ANSD) matched with a control group of parents and children with sensorineural hearing loss (SNHL). The two groups were matched in terms of the child's gender, age, amplifications used, social background and utilisation of private or public health care sectors. An interview questionnaire, consisting of 45 questions in six categories (1. biographic information, 2. experiences of audiological diagnosis, 3. hearing aid benefit, 4. parental experience of the rehabilitation decision making process, 5. parental needs for emotional support and 6. parental needs for information) using a 5-point Likert scale for categories 2-7, was administered by the same audiologist. RESULTS Children with ANSD experienced a significantly longer waiting period from diagnosis to hearing aid fitting (p=0.025) and/or cochlear implantation (p=0.036). Parents of children with ANSD reported significantly different experiences of the diagnostic process (p=0.001) with poorer understanding of the diagnosis and reporting insufficient time allowed for asking questions. During the rehabilitation decision-making process 47% of parents with ANSD children (vs. 0% of parents with SNHL children) reported receiving conflicting information. Parents of children with ANSD were also less likely to recommend hearing aids to other parents. Information needs were similar between groups. CONCLUSIONS Parents of children with ANSD have different experiences and greater uncertainty during the diagnostic and rehabilitation process. Providing regular consultation and structured timelines through the diagnostic process and decision-making process may facilitate this process with less uncertainty.
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Affiliation(s)
- Deidré Stroebel
- Department of Speech-Language Pathology and Audiology, University of Pretoria, South Africa
| | - De Wet Swanepoel
- Department of Speech-Language Pathology and Audiology, University of Pretoria, South Africa; Ear Sciences Centre, School of Surgery, University of Western Australia, Nedlands, Australia; Ear Science Institute Australia, Subiaco, Australia.
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