Genetic etiology of hearing loss in Russia

Posukh, Olga L.

doi:10.1007/s00439-021-02327-7

Cited by 4 publications

(3 citation statements)

References 63 publications

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“…Genetic etiology was confirmed in 57% of the study sample including 50% with pathological genotype in GJB2 gene and 7% in other SNHL-related genes. The most frequent pathogenic variant in the current is 35delG with 77% allelic frequency that is explained by its' high carrier rate in Russian population [25]. Totally eight most frequent pathogenic variants account for 95% of all found variants.…”

Section: Discussionmentioning

confidence: 99%

“…The conception of comprehensive hearing and genetic screening for Russian healthcare system was first proposed in 2010 by Tavartkiladze et al [24]. It was based on detection of 35delG as this pathogenic variant has the highest carrier rate (up to 6%) in Russian population [25]. In the case of 35delG in one allele full GJB2 sequencing should be performed.…”

Section: Introductionmentioning

confidence: 99%

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Towards Comprehensive Newborn Hearing and Genetic Screening in Russia: Perspectives of Implementation

Chibisova,

Markova,

Tsigankova

et al. 2024

JOHBM

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The universal newborn hearing screening (NHS) program was implemented in Russia in 2008 to replace the high-risk newborn hearing screening. More than 95% coverage and significant improvement in early detection and intervention is achieved. Meanwhile, it was shown that current OAE-based hearing screening missed 13% of newborns with genetically ascertained hereditary sensorineural hearing loss (SNHL). The aim of the study is to assess the results of genetic investigation and NHS in a large cohort of Russian children with bilateral SNHL and to study the feasibility of implementation of combined hearing and genetic screening in Russia. Genetic, audiological and NHS data of 1292 pediatric patients with bilateral SNHL born in 2008–2021 were analyzed. GJB2 sequencing was performed for all subjects, 644 patients had pathological GJB2 genotype, 406 of them were homozygous for c.35delG variant. The group of 155 GJB2-negative patients were searched for other SNHL genes, The pathological genotypes were identified at 87 patients. The most frequent genes were STRC (21.8%), USH2A (16.1%), OTOF (8%) and SLC26A4 (6.9%). Children with confirmed genetic etiology passed NHS in 21% of cases. The perspectives of implementation of national comprehensive newborn hearing and genetic screening including whole exome sequencing technologies are discussed.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Towards Comprehensive Newborn Hearing and Genetic Screening in Russia: Perspectives of Implementation

Chibisova,

Markova,

Tsigankova

et al. 2024

JOHBM

View full text Add to dashboard Cite

show abstract

“…However, to date, in Russia, there are relatively few studies that focus on applying MPS methods to elucidate the genetic factors underlying non- GJB2 -related hearing loss. Thus, the prevalence and spectrum of other genes of hearing loss among Russian patients remain unknown [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Spectrum of Genes for Non-GJB2-Related Non-Syndromic Hearing Loss in the Russian Population Revealed by a Targeted Deafness Gene Panel

Shatokhina

Галеева

Степанова

et al. 2022

IJMS

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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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Genetic landscape of hearing loss in prelingual deaf patients of eastern Iran: Insights from exome sequencing analysis

Alerasool,

Eslahi,

Vona

et al. 2024

Clinical Genetics

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Hearing loss is one of the most prevalent genetic disorders in humans. Locus and allelic heterogeneity cause fundamental challenges in hearing loss genetic diagnosis and management of patients and their families. This study examined the genetic profile of patients with prelingual hearing loss who were referred to the Genetic Foundation of Khorasan Razavi spanning over a decade. Deleterious variants in GJB2 were evaluated through Sanger sequencing among 745 non‐syndromic hearing loss patients. Furthermore, exome sequencing was applied in 250 patients with negative GJB2 sequencing results and 30 patients with syndromic hearing loss. The findings revealed a relatively low frequency of GJB2 variants among the studied patients. Exome sequencing successfully identified the genetic causes of hearing loss in 70% of the patients. Moreover, variants in 10 genes, namely SLC26A4, MYO15A, TMPRSS3, TMC1, OTOF, CDH23, PJVK, MYO7A, TECTA, and PCDH15, accounted for 66% of the positive exome sequencing findings in this study. At least three prevalent founder alleles in the hearing‐impaired population of eastern Iran were identified. This study emphasizes the efficiency of exome sequencing as a powerful tool for determining the etiology of prelingual hearing loss in the eastern Iranian population.

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Genetic etiology of hearing loss in Russia

Cited by 4 publications

References 63 publications

Towards Comprehensive Newborn Hearing and Genetic Screening in Russia: Perspectives of Implementation

Towards Comprehensive Newborn Hearing and Genetic Screening in Russia: Perspectives of Implementation

Spectrum of Genes for Non-GJB2-Related Non-Syndromic Hearing Loss in the Russian Population Revealed by a Targeted Deafness Gene Panel

Genetic landscape of hearing loss in prelingual deaf patients of eastern Iran: Insights from exome sequencing analysis

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