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Liu W, Yin D, Li Z, Zhu X, Zhang S, Zhang P, Lin D, Hua Z, Cao Z, Zhang H, Zhang J, Ying C, Xu P, Dong G, Liu K. Comparative Blood Transcriptome Analysis of Semi-Natural and Controlled Environment Populations of Yangtze Finless Porpoise. Animals (Basel) 2024; 14:199. [PMID: 38254368 PMCID: PMC10812818 DOI: 10.3390/ani14020199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2023] [Revised: 12/23/2023] [Accepted: 01/03/2024] [Indexed: 01/24/2024] Open
Abstract
The Yangtze finless porpoises (Neophocaena asiaeorientalis asiaeorientalis) living in different environments display significant differences in behavior and physiology. To compare and analyze gene expression differences between an ex situ population and a controlled environment population of the Yangtze finless porpoise, we sequenced the transcriptome of blood tissues living in a semi-natural reserve and an artificial facility, respectively. We identified 6860 differentially expressed genes (DEGs), of which 6603 were up-regulated and 257 were down-regulated in the controlled environment vs ex situ comparison. GO and KEGG enrichment analysis showed that the up-regulated genes in the controlled environment population were significantly associated with glucose metabolism, amino acid metabolism, and the nervous system, while those up-regulated in the ex situ population were significantly associated with energy supply and biosynthesis. Further analysis showed that metabolic and hearing-related genes were significantly affected by changes in the environment, and key metabolic genes such as HK, PFK, IDH, and GLS and key hearing-related genes such as OTOA, OTOF, SLC38A1, and GABBR2 were identified. These results suggest that the controlled environment population may have enhanced glucose metabolic ability via activation of glycolysis/gluconeogenesis, the TCA cycle, and inositol phosphate metabolism, while the ex situ population may meet higher energy requirements via enhancement of the amino acid metabolism of the liver and muscle and oxidative phosphorylation. Additionally, the acoustic behavior and auditory-related genes of Yangtze finless porpoise may show responsive changes and differential expression under different environment conditions, and thus the auditory sensitivity may also show corresponding adaptive characteristics. This study provides a new perspective for further exploration of the responsive changes of the two populations to various environments and provides a theoretical reference for further improvements in conservation practices for the Yangtze finless porpoise.
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Affiliation(s)
- Wang Liu
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China; (W.L.); (D.Y.); (D.L.); (Z.H.); (J.Z.); (P.X.)
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China;
| | - Denghua Yin
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China; (W.L.); (D.Y.); (D.L.); (Z.H.); (J.Z.); (P.X.)
| | - Zhanwei Li
- Zhuhai Chimelong Investment & Development Co., Ltd., Zhuhai 519000, China; (Z.L.); (P.Z.)
| | - Xiaoyan Zhu
- Anqing Aquatic Technology Promotion Center Station, Anqing 246000, China; (X.Z.); (S.Z.)
| | - Sigang Zhang
- Anqing Aquatic Technology Promotion Center Station, Anqing 246000, China; (X.Z.); (S.Z.)
| | - Peng Zhang
- Zhuhai Chimelong Investment & Development Co., Ltd., Zhuhai 519000, China; (Z.L.); (P.Z.)
| | - Danqing Lin
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China; (W.L.); (D.Y.); (D.L.); (Z.H.); (J.Z.); (P.X.)
| | - Zhong Hua
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China; (W.L.); (D.Y.); (D.L.); (Z.H.); (J.Z.); (P.X.)
| | - Zhichen Cao
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China; (Z.C.); (H.Z.)
| | - Han Zhang
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China; (Z.C.); (H.Z.)
| | - Jialu Zhang
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China; (W.L.); (D.Y.); (D.L.); (Z.H.); (J.Z.); (P.X.)
| | - Congping Ying
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China;
| | - Pao Xu
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China; (W.L.); (D.Y.); (D.L.); (Z.H.); (J.Z.); (P.X.)
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China;
| | - Guixin Dong
- Guangdong South China Rare Wild Animal Species Conservation Center, Zhuhai 519031, China
| | - Kai Liu
- Key Laboratory of Freshwater Fisheries and Germplasm Resources Utilization, Ministry of Agriculture and Rural Affairs, Freshwater Fisheries Research Center, Chinese Academy of Fishery Sciences, Wuxi 214081, China; (W.L.); (D.Y.); (D.L.); (Z.H.); (J.Z.); (P.X.)
- Wuxi Fisheries College, Nanjing Agricultural University, Wuxi 214081, China;
- National Demonstration Center for Experimental Fisheries Science Education, Shanghai Ocean University, Shanghai 201306, China; (Z.C.); (H.Z.)
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Levina EA, Koroleva IV, Levin SV. [Peculiarities of CI processor fitting in children with auditory neuropathy spectrum disorders]. Vestn Otorinolaringol 2023; 88:10-16. [PMID: 37184548 DOI: 10.17116/otorino20228802110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/16/2023]
Abstract
The peculiarities of cochlear implant (CI) processor fitting in children with auditory neuropathy spectrum disorders (ANSD) were investigated. At the 1-st fitting of the CI processor a standard protocol of parameters was used in all patients, including patients with cochlear nerve hypoplasia. After the initial fitting session, the behavioral tonal thresholds with CI in 55% of patients were 30-35 dB, in 32.% of patients - 40-50 dB. After 3-6 months, 65% of children with ANSD showed significant progress in auditory-speech development, which made it possible to use the standard protocol of tuning parameters for them with the most comfortable and threshold levels of electrical stimulation adjusted according to the child's reactions. The best dynamics was observed in 2 children with presynaptic ANSD with a confirmed DFNB9 (OTOF) gene mutation. In 35% of children, there was no progress in distinguishing speech signals and instability of reactions to sounds persisted after 6 months using of CI and speech therapy training, despite the low tonal thresholds of hearing. In these children the coding strategy was changed, the stimulation frequency was reduced, and the pulse width was increased. This helped to improve the discrimination of sounds with CI and progress in the child's speech development. The results demonstrate that children with ANSD require more frequent correction of CI processor settings: 1st year - every 3 months, then at least 2 times a year until the optimal coding strategy and settings are achieved. To predict the effectiveness of CI and determine the optimal tactics for setting up the CI processor in patients with ANSD, the preoperative examination should include MRI of the cerebellopontine angle to detect anomalies of the cochlear nerve and genetic examination to identify mutations that cause hearing impairment in patients with ANSD.
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Affiliation(s)
- E A Levina
- St. Petersburg Research Institute of Ear, Throat, Nose and Speech, St. Petersburg, Russia
| | - I V Koroleva
- St. Petersburg Research Institute of Ear, Throat, Nose and Speech, St. Petersburg, Russia
| | - S V Levin
- St. Petersburg Research Institute of Ear, Throat, Nose and Speech, St. Petersburg, Russia
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Shatokhina O, Galeeva N, Stepanova A, Markova T, Lalayants M, Alekseeva N, Tavarkiladze G, Markova T, Bessonova L, Petukhova M, Guseva D, Anisimova I, Polyakov A, Ryzhkova O, Bliznetz E. Spectrum of Genes for Non- GJB2-Related Non-Syndromic Hearing Loss in the Russian Population Revealed by a Targeted Deafness Gene Panel. Int J Mol Sci 2022; 23:ijms232415748. [PMID: 36555390 PMCID: PMC9779600 DOI: 10.3390/ijms232415748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2022] [Revised: 11/30/2022] [Accepted: 12/04/2022] [Indexed: 12/14/2022] Open
Abstract
Hearing loss is one of the most genetically heterogeneous disorders known. Over 120 genes are reportedly associated with non-syndromic hearing loss (NSHL). To date, in Russia, there have been relatively few studies that apply massive parallel sequencing (MPS) methods to elucidate the genetic factors underlying non-GJB2-related hearing loss cases. The current study is intended to provide an understanding of the mutation spectrum in non-GJB2-related hearing loss in a cohort of Russian sensorineural NSHL patients and establish the best diagnostic algorithm. Genetic testing using an MPS panel, which included 33 NSHL and syndromic hearing loss (SHL) genes that might be misdiagnosed as NSHL genes, was completed on 226 sequentially accrued and unrelated patients. As a result, the molecular basis of deafness was found in 21% of the non-GJB2 NSHL cases. The total contribution pathogenic, and likely pathogenic, variants in the genes studied among all hereditary NSHL Russian patients was 12%. STRC pathogenic and likely pathogenic, variants accounted for 30% of diagnoses in GJB2-negative patients, providing the most common diagnosis. The majority of causative mutations in STRC involved large copy number variants (CNVs) (80%). Among the point mutations, the most common were c.11864G>A (p.Trp3955*) in the USH2A gene, c.2171_2174delTTTG (p.Val724Glyfs*6) in the STRC gene, and c.107A>C (p.His36Pro) and c.1001G>T (p.Gly334Val) in the SLC26A4 gene. Pathogenic variants in genes involved in SHL accounted for almost half of the cases with an established molecular genetic diagnosis, which were 10% of the total cohort of patients with non-GJB2-related hearing loss.
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Affiliation(s)
- Olga Shatokhina
- Federal State Budgetary Institution “Research Centre For Medical Genetics”, 115478 Moscow, Russia
| | - Nailya Galeeva
- Federal State Budgetary Institution “Research Centre For Medical Genetics”, 115478 Moscow, Russia
| | - Anna Stepanova
- Federal State Budgetary Institution “Research Centre For Medical Genetics”, 115478 Moscow, Russia
| | - Tatiana Markova
- Federal State Budgetary Institution of Science “National Research Centre for Audiology and Hearing Rehabilitation”, 117513 Moscow, Russia
- Federal State Budgetary Educational Institution of Further Professional Education “Russian Medical Academy of Continuous Professional Education”, 125993 Moscow, Russia
| | - Maria Lalayants
- Federal State Budgetary Institution of Science “National Research Centre for Audiology and Hearing Rehabilitation”, 117513 Moscow, Russia
- Federal State Budgetary Educational Institution of Further Professional Education “Russian Medical Academy of Continuous Professional Education”, 125993 Moscow, Russia
| | - Natalia Alekseeva
- Federal State Budgetary Institution of Science “National Research Centre for Audiology and Hearing Rehabilitation”, 117513 Moscow, Russia
- Federal State Budgetary Educational Institution of Further Professional Education “Russian Medical Academy of Continuous Professional Education”, 125993 Moscow, Russia
| | - George Tavarkiladze
- Federal State Budgetary Institution of Science “National Research Centre for Audiology and Hearing Rehabilitation”, 117513 Moscow, Russia
- Federal State Budgetary Educational Institution of Further Professional Education “Russian Medical Academy of Continuous Professional Education”, 125993 Moscow, Russia
| | - Tatiana Markova
- Federal State Budgetary Institution “Research Centre For Medical Genetics”, 115478 Moscow, Russia
| | - Liudmila Bessonova
- Federal State Budgetary Institution “Research Centre For Medical Genetics”, 115478 Moscow, Russia
| | - Marina Petukhova
- Federal State Budgetary Institution “Research Centre For Medical Genetics”, 115478 Moscow, Russia
| | - Daria Guseva
- Federal State Budgetary Institution “Research Centre For Medical Genetics”, 115478 Moscow, Russia
| | - Inga Anisimova
- Federal State Budgetary Institution “Research Centre For Medical Genetics”, 115478 Moscow, Russia
| | - Alexander Polyakov
- Federal State Budgetary Institution “Research Centre For Medical Genetics”, 115478 Moscow, Russia
| | - Oxana Ryzhkova
- Federal State Budgetary Institution “Research Centre For Medical Genetics”, 115478 Moscow, Russia
- Correspondence:
| | - Elena Bliznetz
- Federal State Budgetary Institution “Research Centre For Medical Genetics”, 115478 Moscow, Russia
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Sun L, Lin Z, Zhang J, Shen J, Wang X, Yang J. Genetic etiological analysis of auditory neuropathy spectrum disorder by next-generation sequencing. Front Neurol 2022; 13:1026695. [PMID: 36570450 PMCID: PMC9772003 DOI: 10.3389/fneur.2022.1026695] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Accepted: 11/14/2022] [Indexed: 12/12/2022] Open
Abstract
Objective Auditory neuropathy spectrum disease (ANSD) is caused by both environmental and genetic causes and is defined by a failure in peripheral auditory neural transmission but normal outer hair cells function. To date, 13 genes identified as potentially causing ANSD have been documented. To study the etiology of ANSD, we collected 9 probands with ANSD diagnosed in the clinic and performed targeted next-generation sequencing. Methods Nine probands have been identified as ANSD based on the results of the ABR tests and DPOAE/CMs. Genomic DNA extracted from their peripheral blood was examined by next-generation sequencing (NGS) for a gene panel to identify any potential causal variations. For candidate pathogenic genes, we performed co-segregation among all family members of the pedigrees. Subsequently, using a mini-gene assay, we examined the function of a novel splice site mutant of OTOF. Results We analyzed nine cases of patients with ANSD with normal CMs/DPOAE and abnormal ABR, discovered three novel mutants of the OTOF gene that are known to cause ANSD, and six cases of other gene mutations including TBC1D24, LARS2, TIMM8A, MITF, and WFS1. Conclusion Our results extend the mutation spectrum of the OTOF gene and indicate that the genetic etiology of ANSD may be related to gene mutations of TBC1D24, LARS2, TIMM8A, MITF, and WFS1.
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Affiliation(s)
- Lianhua Sun
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China,Shanghai Jiao Tong University School of Medicine Ear Institute, Shanghai, China,Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China,*Correspondence: Lianhua Sun
| | - Zhengyu Lin
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China,Shanghai Jiao Tong University School of Medicine Ear Institute, Shanghai, China,Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Jifang Zhang
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China,Shanghai Jiao Tong University School of Medicine Ear Institute, Shanghai, China,Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Jiali Shen
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China,Shanghai Jiao Tong University School of Medicine Ear Institute, Shanghai, China,Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Xiaowen Wang
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China,Shanghai Jiao Tong University School of Medicine Ear Institute, Shanghai, China,Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China
| | - Jun Yang
- Department of Otorhinolaryngology-Head and Neck Surgery, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China,Shanghai Jiao Tong University School of Medicine Ear Institute, Shanghai, China,Shanghai Key Laboratory of Translational Medicine on Ear and Nose Diseases, Shanghai, China,Jun Yang
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Markova TG, Lalayants MR, Alekseeva NN, Ryzhkova OP, Shatokhina OL, Galeeva NM, Bliznetz EA, Weener ME, Belov OA, Chibisova SS, Polyakov AV, Tavartkiladze GA. Early audiological phenotype in patients with mutations in the USH2A gene. Int J Pediatr Otorhinolaryngol 2022; 157:111140. [PMID: 35452909 DOI: 10.1016/j.ijporl.2022.111140] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 03/16/2022] [Accepted: 04/11/2022] [Indexed: 11/27/2022]
Abstract
INTRODUCTION Nowadays, due to universal newborn hearing screening (UNHS) the number of children with mild-to-moderate hearing loss diagnosed in the first year of life has increased significantly. Aside from that, identification of the genetic cause improves the genetic counselling of the families and allows to reveal possible comorbidities which may need a special approach. OBJECTIVE To present the characteristics of the early audiologic phenotype in hearing impaired patients with biallelic mutations in the USH2A gene based on systematic analysis of the audiological data. PATIENTS AND METHODS 13 patients with mutations in the USH2A gene underwent audiological examination. Most of them were found among a large group of infants with bilateral nonsyndromic sensorineural hearing loss (SNHL) examined under 12 months. RESULTS Eight out of eleven children failed UNHS and were initially diagnosed as having bilateral nonsyndromic SNHL. Seven children underwent an audiological assessment before the age of 9 months. The earliest audiological examination was carried out at 1 and 3 months. The children with pathogenic variants in the USH2A gene in our examined group were identified in the first year of life via UNHS. The hearing threshold levels (HTL) for the USH2A group are compactly distributed between 51.25 dB and 66.25 dB, quartiles are 54 dB and 63.4 dB, with a median of 60 dB. The audiological profile of patients with biallelic USH2A mutations differs from audiograms of patients who had STRC-related hearing loss. We have not found any significant elevation in hearing thresholds in the first decade of life. We also estimated the prevalence of the USH2A and STRC mutations among GJB2-negative infants with bilateral nonsyndromic SNHL examined under 12 months, and it was 7.5% and 16.1%, respectively. CONCLUSION According to our results, the early hearing phenotype in pediatric patients with biallelic mutations in the USH2A- gene is characterized by nonsyndromic mild-to-moderate SNHL in the first decade of life. Our results indicate that the presence of mutations in the USH2A or STRC genes can be expected in a child with congenital mild-to-moderate nonsyndromic SNHL. This information is of practical importance for parents, as they have to know the prognosis of hearing loss for their child from the very beginning. Post-screening follow-up should include adequate clinical, genetic, and social support for children and their parents.
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Affiliation(s)
- T G Markova
- National Research Centre for Audiology and Hearing Rehabilitation, Moscow, 117513, Russia; Russian Medical Academy of Continuing Professional Education, Moscow, 125993, Russia
| | - M R Lalayants
- National Research Centre for Audiology and Hearing Rehabilitation, Moscow, 117513, Russia; Russian Medical Academy of Continuing Professional Education, Moscow, 125993, Russia
| | - N N Alekseeva
- National Research Centre for Audiology and Hearing Rehabilitation, Moscow, 117513, Russia; Russian Medical Academy of Continuing Professional Education, Moscow, 125993, Russia
| | - O P Ryzhkova
- Research Centre for Medical Genetics, Moscow, 115478, Russia
| | - O L Shatokhina
- Research Centre for Medical Genetics, Moscow, 115478, Russia
| | - N M Galeeva
- Research Centre for Medical Genetics, Moscow, 115478, Russia
| | - E A Bliznetz
- Research Centre for Medical Genetics, Moscow, 115478, Russia
| | - M E Weener
- CRO LLC «Oftalmic», Moscow, 125167, Russia
| | - O A Belov
- National Research Centre for Audiology and Hearing Rehabilitation, Moscow, 117513, Russia
| | - S S Chibisova
- National Research Centre for Audiology and Hearing Rehabilitation, Moscow, 117513, Russia; Russian Medical Academy of Continuing Professional Education, Moscow, 125993, Russia
| | - A V Polyakov
- Research Centre for Medical Genetics, Moscow, 115478, Russia
| | - G A Tavartkiladze
- National Research Centre for Audiology and Hearing Rehabilitation, Moscow, 117513, Russia; Russian Medical Academy of Continuing Professional Education, Moscow, 125993, Russia.
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Savenko IV, Garbaruk ES, Boboshko MY. [The issue of auditory neuropathy: from origins to the present]. Vestn Otorinolaringol 2022; 87:60-69. [PMID: 35274894 DOI: 10.17116/otorino20228701160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
The issue of auditory neuropathy spectrum disorders (ANSD) has been in a focus of specialists attention for a relatively short time, but during this time a huge amount of scientific and practical knowledge about this hearing disorder has been accumulated. ANSD is a specific auditory deficit caused by dysfunction of periphery part of the auditory system, which may affect the inner hair cells, the spiral ganglion neurons and the auditory nerve, as well as the area of synaptic contact between them, while the outer hair cells, as a rule, remain intact. As a result, a specific condition is formed, in which a patient's otoacoustic emissions and/or cochlear microphonics are present, auditory brainstem responses are abnormal or absent, electrophysiological data may not correlate with hearing level, the discrepancy between pure tone audiometry and speech discrimination is observed. ANSD prevalence, epidemiology, contemporary views on its etiology, including detailed information on hereditary forms of the disorder and its risk factors are considered in the review. The data on the basic rungs of the ANSD pathogenesis, which underlie the development of various forms of the disorder and mainly determine the rehabilitation approach, are presented. The detailed clinical and audiological characteristics of ANSD are presented; contemporary approach to ANSD diagnosis and rehabilitation, including indications for surgical treatment, are considered.
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Affiliation(s)
- I V Savenko
- Pavlov State Medical University, St. Petersburg, Russia
| | - E S Garbaruk
- Pavlov State Medical University, St. Petersburg, Russia.,St. Petersburg State Pediatric Medical University, St. Petersburg, Russia
| | - M Yu Boboshko
- Pavlov State Medical University, St. Petersburg, Russia.,Mechnikov North-Western State Medical University, St. Petersburg, Russia
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Posukh OL. Genetic etiology of hearing loss in Russia. Hum Genet 2021; 141:649-663. [PMID: 34363095 DOI: 10.1007/s00439-021-02327-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 07/28/2021] [Indexed: 10/20/2022]
Abstract
Prevalence and locus/allelic heterogeneity of the hereditary hearing loss (HL) vary significantly in different human populations. Investigation of the hereditary HL diversity and the evaluation of the factors determining the region-specific landscapes of genetic HL are important for local healthcare and medical genetic services. This review presents the summarized data from the published studies concerning the genetic etiology of HL in different populations of Russia. Multiethnic population of Russia (in total, about 146 million on 2021) includes over 180 different ethnic groups, the number of which varies from millions to just several thousand people. Among them, Russians are the largest group (about 111 million). The contribution of GJB2 gene in the HL etiology in patients of different ethnicities and ethnic-specific prevalence of the GJB2 pathogenic variants were studied in many local populations of Russia. However, the investigation of other "deafness" genes is still limited to a relatively small number of studies on patients with HL of unsolved etiology.
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Affiliation(s)
- Olga L Posukh
- Federal Research Center Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences, Novosibirsk, Russia, 630090. .,Novosibirsk State University, Novosibirsk, Russia, 630090.
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