1
|
Wener ER, McLennan JD, Papsin BC, Cushing SL, Stavropoulos DJ, Mendoza-Londono R, Quercia N, Gordon KA. Variants in Genes Associated with Hearing Loss in Children: Prevalence in a Large Canadian Cohort. Laryngoscope 2024; 134:3832-3838. [PMID: 38426810 DOI: 10.1002/lary.31373] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2023] [Revised: 01/17/2024] [Accepted: 02/02/2024] [Indexed: 03/02/2024]
Abstract
OBJECTIVE The objective of this study was to assess the prevalence of genetic variants associated with hearing loss in a large cohort of children in Canada using high throughput next generation sequencing (NGS). METHODS A total of 485 children with hearing loss underwent NGS testing with an 80 gene panel of syndromic and non-syndromic variants known to be associated with hearing loss. Genetic variants were classified as pathogenic, likely pathogenic, likely benign, benign, or variants of uncertain significance (VUS), according to the American College of Medical Genetics and Genomics guidelines. RESULTS Across the 80 genes tested, 923 variants, predominantly in 28 genes, were identified in 324 children. Pathogenic variants occurred in 19/80 (23.8%) of the hearing loss related genes tested and confirmed the etiology of hearing loss in 73/485 (15.1%) of children. GJB2 was the most prevalent gene, affecting 28/73 (38.4%) children with confirmed genetic hearing loss in our cohort. Most identified variants (748/923, 81.0%, in 76/80 genes) were of uncertain significance. CONCLUSION Genetic testing using NGS identified the etiology in approximately 15% of childhood hearing loss in a Canadian cohort which is lower than what is typically reported. GJB2 was the most common genetic cause of hearing loss. VUS are commonly identified, presenting clinical challenges for counseling. LEVEL OF EVIDENCE 4 Laryngoscope, 134:3832-3838, 2024.
Collapse
Affiliation(s)
- Emily R Wener
- Archie's Cochlear Implant Laboratory, Neuroscience & Mental Health, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Jacob D McLennan
- Archie's Cochlear Implant Laboratory, Neuroscience & Mental Health, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Blake C Papsin
- Archie's Cochlear Implant Laboratory, Neuroscience & Mental Health, Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Sharon L Cushing
- Archie's Cochlear Implant Laboratory, Neuroscience & Mental Health, Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada
| | - Dimitri James Stavropoulos
- Genome Diagnostics Paediatric Laboratory Medicine, Clinical and Metabolic Genetics, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Roberto Mendoza-Londono
- Genome Diagnostics Paediatric Laboratory Medicine, Clinical and Metabolic Genetics, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Nada Quercia
- Division of Clinical & Metabolic Genetics, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Genetic Counselling, The Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Molecular Genetics, Temerty Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada
| | - Karen A Gordon
- Archie's Cochlear Implant Laboratory, Neuroscience & Mental Health, Hospital for Sick Children, Toronto, Ontario, Canada
- Department of Otolaryngology-Head and Neck Surgery, University of Toronto, Hospital for Sick Children, Toronto, Ontario, Canada
| |
Collapse
|
2
|
Alkhidir S, El-Akouri K, Al-Dewik N, Khodjet-El-Khil H, Okashah S, Islam N, Ben-Omran T, Al-Shafai M. The genetic basis and the diagnostic yield of genetic testing related to nonsyndromic hearing loss in Qatar. Sci Rep 2024; 14:4202. [PMID: 38378725 PMCID: PMC10879212 DOI: 10.1038/s41598-024-52784-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Accepted: 01/23/2024] [Indexed: 02/22/2024] Open
Abstract
Hearing loss is the most predominant sensory defect occurring in pediatrics, of which, 66% cases are attributed to genetic factors. The prevalence of hereditary hearing loss increases in consanguineous populations, and the prevalence of hearing loss in Qatar is 5.2%. We aimed to investigate the genetic basis of nonsyndromic hearing loss (NSHL) in Qatar and to evaluate the diagnostic yield of different genetic tests available. A retrospective chart review was conducted for 59 pediatric patients with NSHL referred to the Department of Adult and Pediatric Medical Genetics at Hamad Medical Corporation in Qatar, and who underwent at least one genetic test. Out of the 59 patients, 39 were solved cases due to 19 variants in 11 genes and two copy number variants that explained the NSHL phenotype. Of them 2 cases were initially uncertain and were reclassified using familial segregation. Around 36.8% of the single variants were in GJB2 gene and c.35delG was the most common recurrent variant seen in solved cases. We detected the c.283C > T variant in FGF3 that was seen in a Qatari patient and found to be associated with NSHL for the first time. The overall diagnostic yield was 30.7%, and the diagnostic yield was significantly associated with genetic testing using GJB2 sequencing and using the hearing loss (HL) gene panel. The diagnostic yield for targeted familial testing was 60% (n = 3 patients) and for gene panel was 50% (n = 5). Thus, we recommend using GJB2 gene sequencing as a first-tier genetic test and HL gene panel as a second-tier genetic test for NSHL. Our work provided new insights into the genetic pool of NSHL among Arabs and highlights its unique diversity, this is believed to help further in the diagnostic and management options for NSHL Arab patients.
Collapse
Affiliation(s)
- Shaza Alkhidir
- Department of Biomedical Sciences, College of Health Sciences, QU Health, Qatar University, Doha, Qatar
- Department of Adult and Pediatric Medical Genetics, Hamad Medical Corporation, Doha, Qatar
| | - Karen El-Akouri
- Department of Adult and Pediatric Medical Genetics, Hamad Medical Corporation, Doha, Qatar
- Division of Genetic and Genomic Medicine, Sidra Medicine, Doha, Qatar
| | - Nader Al-Dewik
- Department of Adult and Pediatric Medical Genetics, Hamad Medical Corporation, Doha, Qatar
| | - Houssein Khodjet-El-Khil
- Department of Biomedical Sciences, College of Health Sciences, QU Health, Qatar University, Doha, Qatar
| | - Sarah Okashah
- Department of Adult and Pediatric Medical Genetics, Hamad Medical Corporation, Doha, Qatar
- Department of Public Health, College of Health Sciences, QU Health, Qatar University, Doha, Qatar
| | - Nazmul Islam
- Department of Public Health, College of Health Sciences, QU Health, Qatar University, Doha, Qatar
- Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, Ontario, Canada
| | - Tawfeg Ben-Omran
- Department of Adult and Pediatric Medical Genetics, Hamad Medical Corporation, Doha, Qatar.
- Division of Genetic and Genomic Medicine, Sidra Medicine, Doha, Qatar.
| | - Mashael Al-Shafai
- Department of Biomedical Sciences, College of Health Sciences, QU Health, Qatar University, Doha, Qatar.
- Biomedical Research Center, Qatar University, Doha, Qatar.
| |
Collapse
|
3
|
Amiel A, Tarabeih M. Prenatal Testing and Pregnancy Termination Among Muslim Women Living in Israel Who Have Given Birth to a Child with a Genetic Disease. JOURNAL OF RELIGION AND HEALTH 2023; 62:3215-3229. [PMID: 37715869 DOI: 10.1007/s10943-023-01904-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/21/2023] [Indexed: 09/18/2023]
Abstract
The aim of the study was to investigate whether a Muslim woman with a child afflicted with a genetic disease who is living at home would perform more prenatal tests and pregnancy terminations as opposed to a woman with a normal child living at home, and what demographic characteristics, if any, influenced this decision. The study included 771 Muslim women; 37.1% lived with a child afflicted with a genetic disease; and 62.9% did not. Muslim women with a child affected with a genetic disease living at home will undergo more prenatal testing and more pregnancy terminations. Village dwellers were more religious and consulted further with a religious authority. More city dwellers underwent prenatal tests and pregnancy terminations and received more health care and genetic counseling. In the villages populated by Muslims, more genetic counselling must be given, accompanied by guidance from religious Muslim authorities.
Collapse
Affiliation(s)
- Aliza Amiel
- School of Nursing Sciences, The Academic College of Tel-Aviv-Yaffa, 2 Rabenu Yerucham St, P.O.B 8401, 61083, Tel-Aviv, Israel.
| | - Mahdi Tarabeih
- School of Nursing Sciences, The Academic College of Tel-Aviv-Yaffa, 2 Rabenu Yerucham St, P.O.B 8401, 61083, Tel-Aviv, Israel
| |
Collapse
|
4
|
Amiel A, Na’amnih W, Tarabeih M. Prenatal Diagnosis and Pregnancy Termination in Jewish and Muslim Women with a Deaf Child in Israel. CHILDREN (BASEL, SWITZERLAND) 2023; 10:1438. [PMID: 37761399 PMCID: PMC10528870 DOI: 10.3390/children10091438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2023] [Revised: 08/14/2023] [Accepted: 08/21/2023] [Indexed: 09/29/2023]
Abstract
Deafness is the most common sensory disability in humans, influencing all aspects of life, However, early diagnosis of hearing impairment and initiating the rehabilitation process are of great importance to enable the development of language and communication as soon as possible. We examined the differences in attitudes towards performing prenatal invasive tests and pregnancy terminations in Jewish and Muslim women in Israel due to deafness. Overall, 953 Israeli women, aged 18-46 years with a mean age of 32.0 (SD = 7.12), were enrolled. Of those, 68.7% were city dwellers and 31.3% were village dwellers, and 60.2% were Muslim women and 39.8% were Jewish women. All participants had a child with a hearing impairment or deafness. The group with no genetic hearing loss performed more prenatal invasive tests and pregnancy terminations than those with genetic hearing loss in both ethnic groups. Jewish women performed more invasive prenatal tests and, consequently, a pregnancy termination. Secular Jewish women more frequently underwent pregnancy terminations due to fetal deafness. Further genetic counseling and information concerning IVF and PGD procedures should be provided to the Muslim population.
Collapse
Affiliation(s)
- Aliza Amiel
- School of Nursing Science, The Academic College of Tel Aviv-Yaffo, Tel Aviv 64044, Israel; (W.N.); (M.T.)
| | - Wasef Na’amnih
- School of Nursing Science, The Academic College of Tel Aviv-Yaffo, Tel Aviv 64044, Israel; (W.N.); (M.T.)
- Department of Epidemiology and Preventive Medicine, School of Public Health, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 69978, Israel
| | - Mahdi Tarabeih
- School of Nursing Science, The Academic College of Tel Aviv-Yaffo, Tel Aviv 64044, Israel; (W.N.); (M.T.)
| |
Collapse
|
5
|
Asaad M, Mahfood M, Al Mutery A, Tlili A. Loss-of-function mutations in MYO15A and OTOF cause non-syndromic hearing loss in two Yemeni families. Hum Genomics 2023; 17:42. [PMID: 37189200 DOI: 10.1186/s40246-023-00489-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2022] [Accepted: 05/06/2023] [Indexed: 05/17/2023] Open
Abstract
BACKGROUND Hearing loss is a rare hereditary deficit that is rather common among consanguineous populations. Autosomal recessive non-syndromic hearing loss is the predominant form of hearing loss worldwide. Although prevalent, hearing loss is extremely heterogeneous and poses a pitfall in terms of diagnosis and screening. Using next-generation sequencing has enabled a rapid increase in the identification rate of genes and variants in heterogeneous conditions, including hearing loss. We aimed to identify the causative variants in two consanguineous Yemeni families affected with hearing loss using targeted next-generation sequencing (clinical exome sequencing). The proband of each family was presented with sensorineural hearing loss as indicated by pure-tone audiometry results. RESULTS We explored variants obtained from both families, and our analyses collectively revealed the presence and segregation of two novel loss-of-function variants: a frameshift variant, c.6347delA in MYO15A in Family I, and a splice site variant, c.5292-2A > C, in OTOF in Family II. Sanger sequencing and PCR-RFLP of DNA samples from 130 deaf and 50 control individuals confirmed that neither variant was present in our in-house database. In silico analyses predicted that each variant has a pathogenic effect on the corresponding protein. CONCLUSIONS We describe two novel loss-of-function variants in MYO15A and OTOF that cause autosomal recessive non-syndromic hearing loss in Yemeni families. Our findings are consistent with previously reported pathogenic variants in the MYO15A and OTOF genes in Middle Eastern individuals and suggest their implication in hearing loss.
Collapse
Affiliation(s)
- Maria Asaad
- Department of Applied Biology, College of Sciences, University of Sharjah, Building W8 - Room 107, P.O. Box 27272, Sharjah, UAE
| | - Mona Mahfood
- Department of Applied Biology, College of Sciences, University of Sharjah, Building W8 - Room 107, P.O. Box 27272, Sharjah, UAE
| | - Abdullah Al Mutery
- Department of Applied Biology, College of Sciences, University of Sharjah, Building W8 - Room 107, P.O. Box 27272, Sharjah, UAE
- Human Genetics and Stem Cells Research Group, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah, UAE
| | - Abdelaziz Tlili
- Department of Applied Biology, College of Sciences, University of Sharjah, Building W8 - Room 107, P.O. Box 27272, Sharjah, UAE.
- Human Genetics and Stem Cells Research Group, Research Institute of Sciences and Engineering, University of Sharjah, Sharjah, UAE.
| |
Collapse
|
6
|
Garadat SN, Almasri NA. Translation, adaptation, and validation of the Arabic version of the meaningful auditory integration scale. Cochlear Implants Int 2023; 24:35-42. [PMID: 36369726 DOI: 10.1080/14670100.2022.2141417] [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: 11/15/2022]
Abstract
OBJECTIVES The main objectives of this study were to translate and adapt the infant-toddler meaningful integration scale (IT-MAIS) into Arabic and to establish the psychometric properties of the translated scale in children with a cochlear implant. METHODS The translation and cross-cultural adaptation of this questionnaire were completed in multiple steps and following standard translation protocols. In total, twenty-eight parents of young cochlear implant recipients completed IT-MAIS. Data were collected postoperatively and at 3-, 6-, 9-, and 12-month post-device activation. Data were examined for the validity and reliability of the scale. The internal consistency and reliability of the scale were analyzed using Cronbach α, split-half reliability, and the corrected item-total correlation coefficients. RESULTS Findings demonstrated that the scale exhibited good face and content validity, suggesting that the scale is a one-dimensional measure. Additionally, the reliability analysis for the scale indicated high reliability and correlation among test items. IT-MAIS scores consistently improved over time for all participants and this improvement. correlated negatively with the duration of deafness. CONCLUSION Current findings indicated that the translated Arabic version of the IT-MAIS scale could serve as a valid instrument for assessing the development of auditory skills in Arabic-speaking children with cochlear implants.
Collapse
Affiliation(s)
- Soha N Garadat
- Department of Hearing and Speech Sciences, The University of Jordan, Amman, Jordan
| | - Nihad A Almasri
- Department of Physiotherapy, The University of Jordan, Amman, Jordan
| |
Collapse
|
7
|
Souissi A, Gibriel AA, Masmoudi S. Genetics and meta-analysis of recessive non-syndromic hearing impairment and Usher syndrome in Maghreb population: lessons from the past, contemporary actualities and future challenges. Hum Genet 2021; 141:583-593. [PMID: 34268600 DOI: 10.1007/s00439-021-02314-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 07/08/2021] [Indexed: 11/29/2022]
Abstract
Hereditary hearing impairment (HI) is a heterogeneous condition with over 130 genes associated with genetic non-syndromic HI (NSHI) and Usher syndrome (USH). Approximately 80% of hereditary NSHI cases have autosomal recessive (AR) mode of inheritance. The high rate of consanguinity and endogamy in the Maghreb countries, including Tunisia, Algeria and Morocco, represents a major contributing factor to the development of ARHI. Since the 90s, those populations, with their particular large familiar structure, represented an effective key towards the discovery of the first HI loci and genes. In this study, we performed a deep literature database search to analyze the mutational spectrum and the distribution of pathogenic variants responsible of USH and the NSHI among those populations. To date, 124 pathogenic variants were identified in 32 genes of which over 70% represent population-specific variants. The particular variants' distribution is related to the high rate of consanguinity as well as the multiple shared features such as demographic history of migrations and social behavior that promoted the spreading of several founder mutations within those countries. This is the first study to report lessons from the past and current actualities of HI within the three Maghreb countries. However, despite the great impact placed by such population for the HI genetic studies, only a few next-generation sequencing platforms have so far been implemented with those countries. We, therefore, believe that those countries should be supported to implement this technology that would definitely be of great value in the discovery of additional novel HI genes/variants.
Collapse
Affiliation(s)
- Amal Souissi
- Laboratory of Molecular and Cellular Screening Processes, Center of Biotechnology of Sfax, University of Sfax, Sidi Mansour road Km 6, BP "1177", 3018, Sfax, Tunisia
| | - Abdullah A Gibriel
- Biochemistry and Molecular Biology Department, Faculty of Pharmacy, The British University in Egypt (BUE), Cairo, Egypt
| | - Saber Masmoudi
- Laboratory of Molecular and Cellular Screening Processes, Center of Biotechnology of Sfax, University of Sfax, Sidi Mansour road Km 6, BP "1177", 3018, Sfax, Tunisia.
| |
Collapse
|
8
|
Al-Thani HF, Ahmad MN, Younes S, Zayed H. Genetic Variants Associated With Alzheimer Disease in the 22 Arab Countries: A Systematic Review. Alzheimer Dis Assoc Disord 2021; 35:178-186. [PMID: 33769987 DOI: 10.1097/wad.0000000000000447] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 02/16/2021] [Indexed: 12/13/2022]
Abstract
BACKGROUND AND AIMS Alzheimer disease (AD) is a progressive and complex neurodegenerative disease. Approximately 70% of AD risk is attributed to genetic risk factors, including variants in amyloid precursor protein (APP), presenilin 1 (PSEN1), and presenilin 2 (PSEN2) genes. Several studies have revealed a considerable number of candidate loci and genes for AD among different ethnic populations. However, the outcomes of these studies have been inconsistent. In this study, we aimed to investigate the spectrum of variants that are associated with the onset and development of AD among 22 Arab countries. METHODOLOGY We systematically searched 4 literature databases (Science Direct, Scopus, PubMed, and Web of Science) from the date of inception until July 2020 using various search terms to obtain all the reported genetic data on Arab AD cases. RESULTS In total, 18 studies were included, comprising a total of 2173 individuals, of whom 888 were clinically diagnosed AD patients and were genetically tested for genes and variants associated with AD. A total of 27 variants in 8 genes were found to be associated with AD. Of these variants, 17 were unique to the Arab population and 10 were shared with other ethnic groups. CONCLUSIONS There is a dearth of studies on the genetics of AD in the Arab world. There seems to be distinctive genetic and clinical susceptibility profiles for Arab patients with AD.
Collapse
Affiliation(s)
- Hissa F Al-Thani
- Department of Biomedical Science, College of Health Sciences, QU Health, Qatar University, Doha, Qatar
| | | | | | | |
Collapse
|
9
|
Genetic polymorphisms associated with obesity in the Arab world: a systematic review. Int J Obes (Lond) 2021; 45:1899-1913. [PMID: 34131278 PMCID: PMC8380539 DOI: 10.1038/s41366-021-00867-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2020] [Revised: 04/27/2021] [Accepted: 05/18/2021] [Indexed: 02/05/2023]
Abstract
BACKGROUND Obesity, one of the most common chronic health conditions worldwide, is a multifactorial disease caused by complex genetic and environmental interactions. Several association studies have revealed a considerable number of candidate loci for obesity; however, the genotype-phenotype correlations remain unclear. To date, no comprehensive systematic review has been conducted to investigate the genetic risk factors for obesity among Arabs. OBJECTIVES This study aimed to systematically review the genetic polymorphisms that are significantly associated with obesity in Arabs. METHODS We searched four literature databases (PubMed, Science Direct, Scopus, and Google Scholar) from inception until May 2020 to obtain all reported genetic data related to obesity in Arab populations. Quality assessment and data extraction were performed individually by three investigators. RESULTS In total, 59 studies comprising a total of 15,488 cases and 9,760 controls were included in the systematic review. A total of 76 variants located within or near 49 genes were reported to be significantly associated with obesity. Among the 76 variants, two were described as unique to Arabs, as they have not been previously reported in other populations, and 19 were reported to be distinctively associated with obesity in Arabs but not in non-Arab populations. CONCLUSIONS There appears to be a unique genetic and clinical susceptibility profile of obesity in Arab patients.
Collapse
|