1
|
Tian Y, Lv Y, Wang H, Che J, Cui F, Guo J, Tian W, Peng J, Yang B, Li H, Zhou B, Zhu X, Cui X, Liu L. Prenatal Phenotypic Analysis of Branchio-Oto-Renal Spectrum Disorder Attributable to EYA1 Gene Pathogenic Variants and Systematic Literature Review. Prenat Diagn 2024. [PMID: 39394648 DOI: 10.1002/pd.6673] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2024] [Revised: 08/29/2024] [Accepted: 09/05/2024] [Indexed: 10/13/2024]
Abstract
BACKGROUND Branchio-oto-renal (BOR) spectrum disorders are linked to pathogenic variants in the EYA1 gene, presenting significant challenges for prenatal ultrasound screening due to their phenotypic variability and complexity. Understanding these disorders' phenotypic expressions and genetic foundations is crucial. METHODS Our study included pregnant women who underwent fetal whole-exome sequencing at the Department of Medical Genetics and Prenatal Diagnosis, The Third Affiliated Hospital of Zhengzhou University, Henan, China between January 2023 and March 2024. We identified a novel EYA1 gene pathogenic variant and conducted a systematic literature review of all reported prenatal cases associated with EYA1-related diseases, focusing on the detectability of these conditions in prenatal ultrasound. Additionally, we systematically reviewed case reports related to the EYA1 gene, emphasizing missense pathogenic variants for functional predictions and locus position analysis. RESULTS Our research discovered a new pathogenic variant within the EYA1 gene, highlighting the difficulty of detecting BOR spectrum disorder phenotypes through prenatal ultrasound due to their subtle manifestations. We found that amniotic fluid anomalies and cardiac abnormalities are more prevalent in prenatal cases compared to postnatal cases. A critical region within the EYA Homologous Region (eyaHR) was identified, where missense pathogenic variants significantly affect protein stability, indicating a crucial area associated with the severity of phenotypic expression in EYA1 gene-associated disorders. CONCLUSION This study enhances the understanding of the genetic landscape of BOR spectrum disorders and suggests that certain phenotypic markers and genetic regions may be pivotal in improving prenatal screening and diagnosis for EYA1-related diseases.
Collapse
Affiliation(s)
- Yuan Tian
- Medical Genetics and Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan Province, Zhengzhou, China
| | - Yuexia Lv
- Medical Genetics and Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan Province, Zhengzhou, China
| | - Handuo Wang
- Medical Genetics and Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan Province, Zhengzhou, China
| | - Jia Che
- Medical Genetics and Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan Province, Zhengzhou, China
| | - Fangying Cui
- Medical Genetics and Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan Province, Zhengzhou, China
| | - Jing Guo
- Medical Genetics and Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan Province, Zhengzhou, China
| | - Weifang Tian
- Medical Genetics and Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan Province, Zhengzhou, China
| | - Jia Peng
- Medical Genetics and Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan Province, Zhengzhou, China
| | - Bo Yang
- Medical Genetics and Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan Province, Zhengzhou, China
| | - Haiyu Li
- Medical Genetics and Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan Province, Zhengzhou, China
| | - Baixue Zhou
- Medical Genetics and Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan Province, Zhengzhou, China
| | - Xiaolu Zhu
- Medical Genetics and Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan Province, Zhengzhou, China
| | - Xueyin Cui
- Medical Genetics and Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan Province, Zhengzhou, China
| | - Ling Liu
- Medical Genetics and Prenatal Diagnosis Center, The Third Affiliated Hospital of Zhengzhou University, Maternal and Child Health Hospital of Henan Province, Zhengzhou, China
| |
Collapse
|
2
|
Reshi HA, Medishetti R, Ahuja A, Balasubramanian D, Babu K, Jaiswal M, Chatti K, Maddika S. EYA protein complex is required for Wntless retrograde trafficking from endosomes to Golgi. Dev Cell 2024; 59:2443-2459.e7. [PMID: 38870942 DOI: 10.1016/j.devcel.2024.05.021] [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: 09/24/2022] [Revised: 12/01/2023] [Accepted: 05/17/2024] [Indexed: 06/15/2024]
Abstract
Retrograde transport of WLS (Wntless) from endosomes to trans-Golgi network (TGN) is required for efficient Wnt secretion during development. However, the molecular players connecting endosomes to TGN during WLS trafficking are limited. Here, we identified a role for Eyes Absent (EYA) proteins during retrograde trafficking of WLS to TGN in human cell lines. By using worm, fly, and zebrafish models, we found that the EYA-secretory carrier-associated membrane protein 3 (SCAMP3) axis is evolved in vertebrates. EYAs form a complex and interact with retromer on early endosomes. Retromer-bound EYA complex recruits SCAMP3 to endosomes, which is necessary for the fusion of WLS-containing endosomes to TGN. Loss of EYA complex or SCAMP3 leads to defective transport of WLS to TGN and failed Wnt secretion. EYA mutations found in patients with hearing loss form a dysfunctional EYA-retromer complex that fails to activate Wnt signaling. These findings identify the EYA complex as a component of retrograde trafficking of WLS from the endosome to TGN.
Collapse
Affiliation(s)
- Hilal Ahmad Reshi
- Laboratory of Cell Death & Cell Survival, Centre for DNA Fingerprinting and Diagnostics (CDFD), Uppal, Hyderabad 500039, India; Graduate Studies, Regional Centre for Biotechnology, Faridabad 121001, India
| | - Raghavender Medishetti
- Dr. Reddy's Institute of Life Sciences (DRILS), University of Hyderabad Campus, Hyderabad 500046, India
| | - Aishwarya Ahuja
- Centre for Neuroscience, Indian Institute of Science (IISc), Bangalore 560012, India
| | | | - Kavita Babu
- Centre for Neuroscience, Indian Institute of Science (IISc), Bangalore 560012, India
| | - Manish Jaiswal
- Tata Institute of Fundamental Research, Hyderabad 500046, India
| | - Kiranam Chatti
- Dr. Reddy's Institute of Life Sciences (DRILS), University of Hyderabad Campus, Hyderabad 500046, India
| | - Subbareddy Maddika
- Laboratory of Cell Death & Cell Survival, Centre for DNA Fingerprinting and Diagnostics (CDFD), Uppal, Hyderabad 500039, India.
| |
Collapse
|
3
|
Wang F, Zhang R, Jian J, Sun Y, Li Q. Identification and Functional Study of Enhancers of EYA1: The Causative Gene of Branchio-Oto-Renal Syndrome. Dev Neurosci 2024; 46:333-340. [PMID: 38228108 DOI: 10.1159/000536260] [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: 09/11/2023] [Accepted: 01/10/2024] [Indexed: 01/18/2024] Open
Abstract
INTRODUCTION Branchio-oto-renal syndrome (BOR syndrome) is a rare genetic disorder with an incidence of 1 in 40,000, affecting the development of multiple organs, including the branchio, ear, and kidney. It is responsible for 2% of childhood deafness. Currently, variants in the coding regions of the main causative genes, such as EYA1, SIX1, and SIX5, explain only half of the disease's etiology. Therefore, there is a need to explore the non-coding regions, which constitute the majority of the genome, especially the regulatory regions, as potential new causative factors. METHOD In this study, we focused on the EYA1 gene, which accounts for over 40% of BOR syndrome cases, and conducted a screening of candidate enhancers within a 250-kb region upstream and downstream of the gene using comparative genomics. We characterized the enhancer activities of these candidates in zebrafish using the Tol2 transposon system. RESULTS Our findings revealed that out of the 11 conserved non-coding elements (CNEs) examined, four exhibited enhancer activity. Notably, CNE16.39 and CNE16.45 displayed tissue-specific enhancer activity in the ear. CNE16.39 required the full-length 206 bp sequence for inner-ear-specific expression, while the core functional region of CNE16.45 was identified as 136 bp. Confocal microscopy results demonstrated that both CNE16.39 and CNE16.45 drove the expression of GFP in the sensory region of the crista of the inner ear in zebrafish, consistent with the expression pattern of eya1. CONCLUSION This study contributes to the understanding of the regulatory network governing EYA1 expression and offers new insights to further clarify the pathogenic role of EYA1 in BOR syndrome.
Collapse
Affiliation(s)
- Feng Wang
- Department of General Pediatrics, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China,
- Translational Medical Center for Development and Disease, Shanghai Key Laboratory of Birth Defect Prevention and Control, Institute of Pediatrics, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China,
| | - Ruizhi Zhang
- Translational Medical Center for Development and Disease, Shanghai Key Laboratory of Birth Defect Prevention and Control, Institute of Pediatrics, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | | | - Yanhe Sun
- Translational Medical Center for Development and Disease, Shanghai Key Laboratory of Birth Defect Prevention and Control, Institute of Pediatrics, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| | - Qiang Li
- Translational Medical Center for Development and Disease, Shanghai Key Laboratory of Birth Defect Prevention and Control, Institute of Pediatrics, Children's Hospital of Fudan University, National Children's Medical Center, Shanghai, China
| |
Collapse
|
4
|
Chen A, Ling J, Peng X, Liu X, Mao S, Chen Y, Qin M, Zhang S, Bai Y, Song J, Feng Z, Ma L, He D, Mei L, He C, Feng Y. A Novel EYA1 Mutation Causing Alternative RNA Splicing in a Chinese Family With Branchio-Oto Syndrome: Implications for Molecular Diagnosis and Clinical Application. Clin Exp Otorhinolaryngol 2023; 16:342-358. [PMID: 37817567 DOI: 10.21053/ceo.2023.00668] [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: 05/12/2023] [Accepted: 10/11/2023] [Indexed: 10/12/2023] Open
Abstract
OBJECTIVES Branchio-oto syndrome (BOS) primarily manifests as hearing loss, preauricular pits, and branchial defects. EYA1 is the most common pathogenic gene, and splicing mutations account for a substantial proportion of cases. However, few studies have addressed the structural changes in the protein caused by splicing mutations and potential pathogenic factors, and several studies have shown that middle-ear surgery has limited effectiveness in improving hearing in these patients. BOS has also been relatively infrequently reported in the Chinese population. This study explored the genetic etiology in the family of a proband with BOS and provided clinical treatment to improve the patient's hearing. METHODS We collected detailed clinical features and peripheral blood samples from the patients and unaffected individuals within the family. Pathogenic mutations were identified by whole-exome sequencing and cosegregation analysis and classified according to the American College of Medical Genetics and Genomics guidelines. Alternative splicing was verified through a minigene assay. The predicted three-dimensional protein structure and biochemical experiments were used to investigate the pathogenicity of the mutation. The proband underwent middle-ear surgery and was followed up at 1 month and 6 months postoperatively to monitor auditory improvement. RESULTS A novel heterozygous EYA1 splicing variant (c.1050+4 A>C) was identified and classified as pathogenic (PVS1(RNA), PM2, PP1). Skipping of exon 11 of the EYA1 pre-mRNA was confirmed using a minigene assay. This mutation may impair EYA1-SIX1 interactions, as shown by an immunoprecipitation assay. The EYA1-Mut protein exhibited cellular mislocalization and decreased protein expression in cytological experiments. Middle-ear surgery significantly improved hearing loss caused by bone-conduction abnormalities in the proband. CONCLUSION We reported a novel splicing variant of EYA1 in a Chinese family with BOS and revealed the potential molecular pathogenic mechanism. The significant hearing improvement observed in the proband after middle-ear surgery provides a reference for auditory rehabilitation in similar patients.
Collapse
Affiliation(s)
- Anhai Chen
- Department of Otorhinolaryngology, Xiangya Hospital, Central South University, Changsha, China
- Key Laboratory of Otolaryngology Major Disease Research of Hunan Province, Changsha, China
- National Clinical Research Centre for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha, China
| | - Jie Ling
- Medical Functional Experiment Center, School of Basic Medicine, Central South University, Changsha, China
| | - Xin Peng
- National Clinical Research Centre for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha, China
- Department of Pathology, Xiangya Hospital, Central South University, Changsha, China
| | - Xianlin Liu
- Department of Otorhinolaryngology, Xiangya Hospital, Central South University, Changsha, China
- Key Laboratory of Otolaryngology Major Disease Research of Hunan Province, Changsha, China
- National Clinical Research Centre for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha, China
| | - Shuang Mao
- Department of Otorhinolaryngology, Xiangya Hospital, Central South University, Changsha, China
- Key Laboratory of Otolaryngology Major Disease Research of Hunan Province, Changsha, China
- National Clinical Research Centre for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha, China
| | - Yongjia Chen
- Department of Otorhinolaryngology, Xiangya Hospital, Central South University, Changsha, China
- Key Laboratory of Otolaryngology Major Disease Research of Hunan Province, Changsha, China
- National Clinical Research Centre for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha, China
| | - Mengyao Qin
- Department of Otorhinolaryngology, Xiangya Hospital, Central South University, Changsha, China
- Key Laboratory of Otolaryngology Major Disease Research of Hunan Province, Changsha, China
- National Clinical Research Centre for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha, China
| | - Shuai Zhang
- Department of Otorhinolaryngology, Xiangya Hospital, Central South University, Changsha, China
- Key Laboratory of Otolaryngology Major Disease Research of Hunan Province, Changsha, China
- National Clinical Research Centre for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha, China
| | - Yijiang Bai
- Department of Otorhinolaryngology, Xiangya Hospital, Central South University, Changsha, China
- Key Laboratory of Otolaryngology Major Disease Research of Hunan Province, Changsha, China
- National Clinical Research Centre for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha, China
| | - Jian Song
- Department of Otorhinolaryngology, Xiangya Hospital, Central South University, Changsha, China
- Key Laboratory of Otolaryngology Major Disease Research of Hunan Province, Changsha, China
- National Clinical Research Centre for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha, China
| | - Zhili Feng
- Department of Otorhinolaryngology, Head and Neck Surgery, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, China
- MOE Key Lab of Rare Pediatric Diseases and Institute of Otorhinolaryngology, Head and Neck Surgery, University of South China, Changsha, China
| | - Lu Ma
- MOE Key Lab of Rare Pediatric Diseases and Institute of Otorhinolaryngology, Head and Neck Surgery, University of South China, Changsha, China
- The Hengyang Key Laboratory of Cellular Stress Biology, Institute of Cytology and Genetics, Hengyang Medical School, University of South China, Hengyang, China
| | - Dinghua He
- Department of Otorhinolaryngology, The Affiliated Maternal and Child Health Hospital of Hunan Province, Hengyang Medical School, University of South China, Changsha, China
| | - Lingyun Mei
- Department of Otorhinolaryngology, Xiangya Hospital, Central South University, Changsha, China
- Key Laboratory of Otolaryngology Major Disease Research of Hunan Province, Changsha, China
- National Clinical Research Centre for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha, China
| | - Chufeng He
- Department of Otorhinolaryngology, Xiangya Hospital, Central South University, Changsha, China
- Key Laboratory of Otolaryngology Major Disease Research of Hunan Province, Changsha, China
- National Clinical Research Centre for Geriatric Disorders, Department of Geriatrics, Xiangya Hospital, Central South University, Changsha, China
| | - Yong Feng
- Department of Otorhinolaryngology, Xiangya Hospital, Central South University, Changsha, China
- Department of Otorhinolaryngology, Head and Neck Surgery, The Affiliated Changsha Central Hospital, Hengyang Medical School, University of South China, Changsha, China
- MOE Key Lab of Rare Pediatric Diseases and Institute of Otorhinolaryngology, Head and Neck Surgery, University of South China, Changsha, China
- Department of Otorhinolaryngology, The Affiliated Maternal and Child Health Hospital of Hunan Province, Hengyang Medical School, University of South China, Changsha, China
| |
Collapse
|
5
|
Yuan L, Yang R, Deng H. Auricular fistula: a review of its clinical manifestations, genetics, and treatments. J Mol Med (Berl) 2023; 101:1041-1058. [PMID: 37458758 DOI: 10.1007/s00109-023-02343-2] [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: 12/19/2022] [Revised: 06/21/2023] [Accepted: 06/22/2023] [Indexed: 09/07/2023]
Abstract
Auricular fistula is a common congenital auricular malformation, characterized as a small opening in the skin and a subcutaneous cyst. It can be classified in different ways according to positions of pits and directions of fistula tracts. The term preauricular fistula and variant type of preauricular fistula (postauricular fistula) are used. Auricular fistula prevalence varies in countries and populations, and its actual prevalence is presently unknown. The most accepted and widely cited theory of auricular fistula etiopathogenesis is an incorrect or incomplete fusion of six auricular hillocks that are mesenchymal proliferations. Auricular fistula can occur either sporadically or genetically. The pattern in inherited cases is thought to be incomplete autosomal dominant, with variable expressions, reduced penetrance, and inapparent gender differences. Auricular fistula has several forms and is reported as being a component of many syndromes. In the field of genetics, currently, there is no related review to comprehensively summarize the genetic basis of auricular fistula and related disorders. This article provides a comprehensive review of auricular fistula, especially congenital preauricular fistula, which accounts for the majority of auricular fistula, by summarizing the clinical manifestations, histological and embryological development, genetics, examinations, and treatments, as well as syndromes with auricular fistula.
Collapse
Affiliation(s)
- Lamei Yuan
- Health Management Center, the Third Xiangya Hospital, Central South University, Changsha, 410013, China
- Center for Experimental Medicine, the Third Xiangya Hospital, Central South University, Changsha, 410013, China
- Disease Genome Research Center, Central South University, Changsha, 410013, China
- Department of Neurology, the Third Xiangya Hospital, Central South University, Changsha, 410013, China
| | - Ruikang Yang
- Health Management Center, the Third Xiangya Hospital, Central South University, Changsha, 410013, China
- Center for Experimental Medicine, the Third Xiangya Hospital, Central South University, Changsha, 410013, China
- Disease Genome Research Center, Central South University, Changsha, 410013, China
| | - Hao Deng
- Health Management Center, the Third Xiangya Hospital, Central South University, Changsha, 410013, China.
- Center for Experimental Medicine, the Third Xiangya Hospital, Central South University, Changsha, 410013, China.
- Disease Genome Research Center, Central South University, Changsha, 410013, China.
- Department of Neurology, the Third Xiangya Hospital, Central South University, Changsha, 410013, China.
| |
Collapse
|
6
|
Biggs K, Crundwell G, Metcalfe C, Muzaffar J, Monksfield P, Bance M. Anatomical and audiological considerations in branchiootorenal syndrome: A systematic review. Laryngoscope Investig Otolaryngol 2022; 7:540-563. [PMID: 35434312 PMCID: PMC9008175 DOI: 10.1002/lio2.749] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Revised: 12/08/2021] [Accepted: 12/11/2021] [Indexed: 11/23/2022] Open
Abstract
Objective Establish anatomical considerations, audiological outcomes, and optimal management in patients with branchiootic/branchiootorenal syndrome (BO/BOR). Methods Databases reviewed: Medline, Pubmed, Embase, Web of Science, Cochrane Collection, and ClinicalTrials.gov. Clinical or radiological studies of patients with BOR syndrome describing either the audiological profile or anatomical changes were included. Articles in which BOR syndrome was associated with other syndromes, and those that were focused only on general and genetic aspects of BOR syndrome were excluded. Articles were assessed using Oxford Centre for Evidence‐Based Medicine (OCEBM) grading system and the Brazzelli risk of bias tool for nonrandomized studies. Results Searches identified 379 articles. Of these, 64 studies met the inclusion criteria, reporting outcomes in 482 patients from at least 95 families. In 308 patients, hearing loss was categorized as sensorineural (29%), conductive (20%), and mixed (51%). Hearing outcomes were variable in terms of onset, pattern, and severity; ranging from mild to profound deafness. One hundred sixty‐nine patients presented with inner ear anomalies, 145 had middle, and 151 had external ear abnormalities. In 44 studies, 58 ear operations were described. Mixed outcomes were reported in patients managed with hearing aids or middle ear surgery; however, successful cochlear implantation was described in all five cases. Conclusion The anatomical and audiological profiles of patients with BO/BOR are variable. A range of surgical procedures were described, however lacked objective outcome measures. Given the range of anatomical variants, management decisions should be made on an individual basis including full audiological and radiological assessment. Level of evidence NA.
Collapse
Affiliation(s)
- Kirsty Biggs
- Royal Stoke University Hospital Stoke on Trent UK
- Wolfson Institute of Population Health Queen Mary University of London London UK
| | - Gemma Crundwell
- Cambridge University Hospitals NHS Foundation Trust Addenbrooke’s Health Campus Cambridge UK
| | - Christopher Metcalfe
- Royal Stoke University Hospital Stoke on Trent UK
- ENT Department, Queen Elizabeth Hospital Birmingham University Hospitals Birmingham NHS Foundation Trust Birmingham UK
| | - Jameel Muzaffar
- ENT Department, Queen Elizabeth Hospital Birmingham University Hospitals Birmingham NHS Foundation Trust Birmingham UK
- University of Cambridge Department of Clinical Neurosciences, Addenbrooke’s Health Campus Cambridge UK
| | - Peter Monksfield
- ENT Department, Queen Elizabeth Hospital Birmingham University Hospitals Birmingham NHS Foundation Trust Birmingham UK
| | - Manohar Bance
- Cambridge University Hospitals NHS Foundation Trust Addenbrooke’s Health Campus Cambridge UK
- University of Cambridge Department of Clinical Neurosciences, Addenbrooke’s Health Campus Cambridge UK
| |
Collapse
|
7
|
Abstract
Usher syndrome (USH) is the most common genetic condition responsible for combined loss of hearing and vision. Balance disorders and bilateral vestibular areflexia are also observed in some cases. The syndrome was first described by Albrecht von Graefe in 1858, but later named by Charles Usher, who presented a large number of cases with hearing loss and retinopathy in 1914. USH has been grouped into three main clinical types: 1, 2, and 3, which are caused by mutations in different genes and are further divided into different subtypes. To date, nine causative genes have been identified and confirmed as responsible for the syndrome when mutated: MYO7A, USH1C, CDH23, PCDH15, and USH1G (SANS) for Usher type 1; USH2A, ADGRV1, and WHRN for Usher type 2; CLRN1 for Usher type 3. USH is inherited in an autosomal recessive pattern. Digenic, bi-allelic, and polygenic forms have also been reported, in addition to dominant or nonsyndromic forms of genetic mutations. This narrative review reports the causative forms, diagnosis, prognosis, epidemiology, rehabilitation, research, and new treatments of USH.
Collapse
|
8
|
Mironovich OL, Bliznetz EA, Markova TG, Alekseeva NN, Golybeva TI, Ryzhkova OP, Polyakov AV. Molecular Genetic Causes and Clinical Description of Branchio-Oto-renal Syndrome. RUSS J GENET+ 2019. [DOI: 10.1134/s1022795419050119] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
|
9
|
Wang YG, Sun SP, Qiu YL, Xing QH, Lu W. A novel mutation in EYA1 in a Chinese family with Branchio-oto-renal syndrome. BMC MEDICAL GENETICS 2018; 19:139. [PMID: 30086703 PMCID: PMC6081847 DOI: 10.1186/s12881-018-0653-2] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/18/2017] [Accepted: 07/24/2018] [Indexed: 01/07/2023]
Abstract
Background Branchio-oto-renal (BOR) syndrome is a dominant autosomal disorder characterized by phenotypes such as hearing loss, branchial fistulae, preauricular pits, and renal abnormalities. EYA1, the human homolog of the Drosophila “eye absent” gene on chromosome 8q13.3, is recognized as one of the most important genes associated with BOR syndrome. Methods The proposita in this study was a 5-year-old Chinese girl with hearing loss, bilateral otitis media with effusion, microtia, facial hypoplasia, palatoschisis, and bilateral branchial cleft fistulae. The girl’s family members, except two who were deceased, agreed to undergo clinical examination. We collected blood samples from 10 family members, including six who were affected by the syndrome. Genomic DNA was extracted and subjected to Sanger sequencing. A minigene assay was performed to confirm whether splicing signals were altered. In addition, we performed western blotting to determine alterations in protein levels of the wild-type and mutant gene. Results Clinical tests showed that some of the family members met the criteria for BOR syndrome. The affected members harbored a novel heterozygous nonsense variation in exon 11 of EYA1, whereas no unaffected member carried the mutation at this position. Functional experiments did not detect abnormal splicing at the RNA level; however, western blotting showed that the mutated protein was truncated. Conclusions This study reports a novel mutation associated with BOR syndrome in a Chinese family. We highlight the usefulness of genetic testing in the diagnosis of BOR syndrome. Thus, we believe that this report would benefit clinicians in this field. Electronic supplementary material The online version of this article (10.1186/s12881-018-0653-2) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Yan-Gong Wang
- Institutes of Biomedical Sciences and Children's Hospital, Fudan University, Mingdao Building, Dong-an Road 131, Shanghai, 200032, China
| | - Shu-Ping Sun
- Department of Otorhinolaryngology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jian-she Road, Zhengzhou, 450052, China
| | - Yi-Ling Qiu
- The Center for Pediatric Liver Diseases, Children's Hospital of Fudan University, Wan-yuan Road 399, Shanghai, 201102, China
| | - Qing-He Xing
- Institutes of Biomedical Sciences and Children's Hospital, Fudan University, Mingdao Building, Dong-an Road 131, Shanghai, 200032, China.
| | - Wei Lu
- Department of Otorhinolaryngology, The First Affiliated Hospital of Zhengzhou University, No. 1 Jian-she Road, Zhengzhou, 450052, China.
| |
Collapse
|
10
|
Dantas VG, Freitas EL, Della-Rosa VA, Lezirovitz K, de Moraes AMS, Ramos SB, Oiticica J, Alves LU, Pearson PL, Rosenberg C, Mingroni-Netto RC. Novel partial duplication ofEYA1causes branchiootic syndrome in a large Brazilian family. Int J Audiol 2015; 54:593-8. [DOI: 10.3109/14992027.2015.1030511] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|