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Vanstrum EB, Castellanos CX, Ziltzer RS, Ulloa R, Moen R, Choi JS, Cortessis VK. Cochlear implantation in Waardenburg syndrome: Systematic review and meta-analysis. Int J Pediatr Otorhinolaryngol 2023; 175:111738. [PMID: 37847940 DOI: 10.1016/j.ijporl.2023.111738] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2023] [Revised: 08/16/2023] [Accepted: 09/18/2023] [Indexed: 10/19/2023]
Abstract
OBJECTIVE Waardenburg syndrome (WS) is a genetic condition associated with moderate to profound sensorineural hearing loss. The aim of this review is to characterize cochlear implant (CI) outcomes in patients with a confirmed clinical diagnosis of WS. DATA SOURCES MEDLINE, Ovid EMBASE, and Cochrane Library. REVIEW METHODS All reports describing defined sets of patients with WS who underwent CI and subsequent evaluation of clinical outcomes were included. To harmonize outcome data between studies that used different measures, a binary variable Favored CI was developed to capture success of procedures (1 = favored, 0 = unfavored) based on original authors' description, commentary, discussion, and conclusions. Expert reviewers independently reviewed and selected articles, extracted data and scored Favored CI values. Synthetic and analytic meta-analyses were implemented using standard analytic techniques. RESULTS Twenty articles meeting inclusion criteria provided data on 192 WS patients and 210 CIs. The mean age at CI was 3.8 years (95% confidence interval [95%CI]; 3.1-4.5 years), and the mean duration of follow up was 5.2 years (95% CI; 3.4-7.0 years). Surgical complications were rare (11/210 implants, 5.2%) where gusher was the most common complication. CIs yielded favorable hearing outcomes in 90% (95% CI; 84-94%) of cases, and appear successful for those with temporal bone anomalies (p = 0.04). CONCLUSIONS Quantitative synthesis of the study data demonstrates that in the majority of patients with WS, CI yield favorable hearing outcomes and low rates of surgical complications. CI has shown to provide clinical benefits in patients with WS.
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Affiliation(s)
- Erik B Vanstrum
- Department of Head and Neck Surgery, David Geffen School of Medicine at the University of California Los Angeles, Los Angeles, CA, USA.
| | | | | | - Ruben Ulloa
- Keck School of Medicine, Los Angeles, CA, USA
| | | | - Janet S Choi
- Department of Otolaryngology - Head and Neck Surgery, University of Minnesota, USA
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Xiao J, Hao LW, Wang J, Yu XS, You JY, Li ZJ, Mao HD, Meng XY, Feng JX. Comprehensive characterization of the genetic landscape of familial Hirschsprung's disease. World J Pediatr 2023; 19:644-651. [PMID: 36857021 PMCID: PMC10258170 DOI: 10.1007/s12519-023-00686-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/04/2022] [Accepted: 01/09/2023] [Indexed: 03/02/2023]
Abstract
BACKGROUND Hirschsprung's disease (HSCR) is one of the most common congenital digestive tract malformations and can cause stubborn constipation or gastrointestinal obstruction after birth, causing great physical and mental pain to patients and their families. Studies have shown that more than 20 genes are involved in HSCR, and most cases of HSCR are sporadic. However, the overall rate of familial recurrence in 4331 cases of HSCR is about 7.6%. Furthermore, familial HSCR patients show incomplete dominance. We still do not know the penetrance and genetic characteristics of these known risk genes due to the rarity of HSCR families. METHODS To find published references, we used the title/abstract terms "Hirschsprung" and "familial" in the PubMed database and the MeSH terms "Hirschsprung" and "familial" in Web of Science. Finally, we summarized 129 HSCR families over the last 40 years. RESULTS The male-to-female ratio and the percentage of short segment-HSCR in familial HSCR are much lower than in sporadic HSCR. The primary gene factors in the syndromic families are ret proto-oncogene (RET) and endothelin B receptor gene (EDNRB). Most families show incomplete dominance and are relevant to RET, and the RET mutation has 56% penetrance in familial HSCR. When one of the parents is a RET mutation carrier in an HSCR family, the offspring's recurrence risk is 28%, and the incidence of the offspring does not depend on whether the parent suffers from HSCR. CONCLUSION Our findings will help HSCR patients obtain better genetic counseling, calculate the risk of recurrence, and provide new insights for future pedigree studies.
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Affiliation(s)
- Jun Xiao
- Department of Pediatric Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
- Hubei Clinical Center of Hirschsprung's Disease and Allied Disorders, Wuhan, 430030, China
| | - Lu-Wen Hao
- Department of Radiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
| | - Jing Wang
- Department of Pediatric Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
- Hubei Clinical Center of Hirschsprung's Disease and Allied Disorders, Wuhan, 430030, China
| | - Xiao-Si Yu
- Department of Pediatric Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
- Hubei Clinical Center of Hirschsprung's Disease and Allied Disorders, Wuhan, 430030, China
| | - Jing-Yi You
- Department of Pediatric Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
- Hubei Clinical Center of Hirschsprung's Disease and Allied Disorders, Wuhan, 430030, China
| | - Ze-Jian Li
- Department of Pediatric Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
- Hubei Clinical Center of Hirschsprung's Disease and Allied Disorders, Wuhan, 430030, China
| | - Han-Dan Mao
- Department of Pediatric Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China
- Hubei Clinical Center of Hirschsprung's Disease and Allied Disorders, Wuhan, 430030, China
| | - Xin-Yao Meng
- Department of Pediatric Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China.
- Hubei Clinical Center of Hirschsprung's Disease and Allied Disorders, Wuhan, 430030, China.
| | - Jie-Xiong Feng
- Department of Pediatric Surgery, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095 Jiefang Avenue, Wuhan, 430030, China.
- Hubei Clinical Center of Hirschsprung's Disease and Allied Disorders, Wuhan, 430030, China.
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3
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Koh JY, Affortit C, Ranum PT, West C, Walls WD, Yoshimura H, Shao JQ, Mostaert B, Smith RJH. Single-cell RNA-sequencing of stria vascularis cells in the adult Slc26a4 -/- mouse. BMC Med Genomics 2023; 16:133. [PMID: 37322474 PMCID: PMC10268361 DOI: 10.1186/s12920-023-01549-0] [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: 01/20/2023] [Accepted: 05/15/2023] [Indexed: 06/17/2023] Open
Abstract
BACKGROUND The primary pathological alterations of Pendred syndrome are endolymphatic pH acidification and luminal enlargement of the inner ear. However, the molecular contributions of specific cell types remain poorly characterized. Therefore, we aimed to identify pH regulators in pendrin-expressing cells that may contribute to the homeostasis of endolymph pH and define the cellular pathogenic mechanisms that contribute to the dysregulation of cochlear endolymph pH in Slc26a4-/- mice. METHODS We used single-cell RNA sequencing to identify both Slc26a4-expressing cells and Kcnj10-expressing cells in wild-type (WT, Slc26a4+/+) and Slc26a4-/- mice. Bioinformatic analysis of expression data confirmed marker genes defining the different cell types of the stria vascularis. In addition, specific findings were confirmed at the protein level by immunofluorescence. RESULTS We found that spindle cells, which express pendrin, contain extrinsic cellular components, a factor that enables cell-to-cell communication. In addition, the gene expression profile informed the pH of the spindle cells. Compared to WT, the transcriptional profiles in Slc26a4-/- mice showed downregulation of extracellular exosome-related genes in spindle cells. Immunofluorescence studies in spindle cells of Slc26a4-/- mice validated the increased expression of the exosome-related protein, annexin A1, and the clathrin-mediated endocytosis-related protein, adaptor protein 2. CONCLUSION Overall, cell isolation of stria vascularis from WT and Slc26a4-/- samples combined with cell type-specific transcriptomic analyses revealed pH-dependent alternations in spindle cells and intermediate cells, inspiring further studies into the dysfunctional role of stria vascularis cells in SLC26A4-related hearing loss.
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Affiliation(s)
- Jin-Young Koh
- Roy J. Carver Department of Biomedical Engineering, College of Engineering, University of Iowa, University of Iowa, Iowa City, IA, USA
- Molecular Otolaryngology and Renal Research Laboratories, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Corentin Affortit
- Molecular Otolaryngology and Renal Research Laboratories, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Paul T Ranum
- Molecular Otolaryngology and Renal Research Laboratories, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
- Raymond G. Perelman Center for Cellular and Molecular Therapeutics, The Children's Hospital of Philadelphia Research Institute, Philadelphia, PA, USA
| | - Cody West
- Molecular Otolaryngology and Renal Research Laboratories, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - William D Walls
- Molecular Otolaryngology and Renal Research Laboratories, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Hidekane Yoshimura
- Molecular Otolaryngology and Renal Research Laboratories, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
- Department of Otorhinolaryngology - Head and Neck Surgery, Shinshu University School of Medicine, Matsumoto, Japan
| | - Jian Q Shao
- Central Microscopy Research Facility, University of Iowa, Iowa City, IA, USA
| | - Brian Mostaert
- Department of Otolaryngology, Head and Neck Surgery, Carver College of Medicine, University of Iowa, Iowa City, IA, USA
| | - Richard J H Smith
- Roy J. Carver Department of Biomedical Engineering, College of Engineering, University of Iowa, University of Iowa, Iowa City, IA, USA.
- Molecular Otolaryngology and Renal Research Laboratories, Carver College of Medicine, University of Iowa, Iowa City, IA, USA.
- Department of Otolaryngology, Head and Neck Surgery, Carver College of Medicine, University of Iowa, Iowa City, IA, USA.
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Mutations in rhodopsin, endothelin B receptor, and CC chemokine receptor 5 in large animals: Modeling human diseases. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2022; 189:155-178. [PMID: 35595348 DOI: 10.1016/bs.pmbts.2022.02.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
G protein-coupled receptors (GPCRs) are the largest family of cell membrane receptors involved in modulating almost all physiological processes by transducing extracellular signals into the cytoplasm. Dysfunctions of GPCR-regulated signaling result in diverse human diseases, making GPCRs the most popular drug targets for human medicine. Large animals share higher similarities (in physiology and metabolism) with humans than rodents. Similar to findings in human genetics, diverse diseases caused by mutations in GPCR genes have also been discovered in large animals. Rhodopsin, endothelin B receptor, and CC chemokine receptor type 5 have been shown to be involved in human retinitis pigmentosa, Hirschsprung disease, and HIV infection/AIDS, respectively, and several mutations of these GPCRs have also been identified from large animals. The large animals with naturally occurring mutations of these GPCRs provide an opportunity to gain a better understanding of the pathogenesis of human diseases, and can be used for preclinical trials of therapies for human diseases. In this review, we aim to summarize the naturally occurring mutations of these three GPCRs in large animals and humans.
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Holbrook M, Tobias JD. Perioperative Care of a Patient With Waardenburg Syndrome. J Med Cases 2021; 12:381-385. [PMID: 34691332 PMCID: PMC8510664 DOI: 10.14740/jmc3751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2021] [Accepted: 07/29/2021] [Indexed: 11/24/2022] Open
Abstract
Waardenburg syndrome is a genetic disorder, resulting in defective control of the division and migration of neural crest cells including the melanocyte lineage during embryonic development. Primary involvement of melanocytes results in the characteristic phenotypic involvement including a white forelock, vitiligo, and heterochromia. Involvement of the organ of Corti leads to sensorineural hearing loss. Involvement of the craniofacial mesenchyme results in abnormal facial features, airway abnormality, and upper limb involvement malformations. Given the potential for end-organ involvement, surgical intervention may be required. Specific concerns during anesthetic care include the potential for difficulties with endotracheal intubation, tracheal involvement, impairment of communication related to deafness, and associated congenital heart disease.
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Affiliation(s)
- Miranda Holbrook
- Heritage College of Osteopathic Medicine - Dublin Campus, Ohio University, Athens, OH, USA
| | - Joseph D Tobias
- Department of Anesthesiology & Pain Medicine, Nationwide Children's Hospital and the Department of Anesthesiology & Pain Medicine, The Ohio State University College of Medicine, Columbus, OH, USA
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6
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Albarry MA, Latif M, Alreheli AQ, Awadh MA, Almatrafi AM, Albalawi AM, Basit S. Frameshift variant in MITF gene in a large family with Waardenburg syndrome type II and a co-segregation of a C2orf74 variant. PLoS One 2021; 16:e0246607. [PMID: 33571247 PMCID: PMC7877624 DOI: 10.1371/journal.pone.0246607] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Accepted: 01/21/2021] [Indexed: 11/30/2022] Open
Abstract
Waardenburg syndrome (WS) is a hereditary disorder affecting the auditory system and pigmentation of hair, eyes, and skin. Different variants of the disease exist with the involvement of mutation in six genes. The aim of the study is to identify the genetic defects underlying Waardenburg syndrome in a large family with multiple affected individuals. Here, in this study, we recruited a large family with eleven affected individuals segregating WS type 2. We performed whole genome SNP genotyping, whole exome sequencing and segregation analysis using Sanger approach. Whole genome SNP genotyping, whole exome sequencing followed by Sanger validation of variants of interest identified a novel single nucleotide deletion mutation (c.965delA) in the MITF gene. Moreover, a rare heterozygous, missense damaging variant (c.101T>G; p.Val34Gly) in the C2orf74 has also been identified. The C2orf74 is an uncharacterized gene present in the linked region detected by DominantMapper. Variants in MITF and C2orf74 follows autosomal dominant segregation with the phenotype, however, the variant in C2orf74 is incompletely penetrant. We proposed a digenic inheritance of variants as an underlying cause of WS2 in this family.
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Affiliation(s)
- Maan Abdullah Albarry
- Department of Ophthalmology, College of Medicine, Taibah University, Almadinah, Saudi Arabia
| | - Muhammad Latif
- Center for Genetics and Inherited Diseases, Taibah University, Almadinah, Saudi Arabia
| | - Ahdab Qasem Alreheli
- Department of Ophthalmology, College of Medicine, Taibah University, Almadinah, Saudi Arabia
| | - Mohammed A. Awadh
- College of Applied Medical Sciences, Taibah University, Almadinah, Saudi Arabia
| | - Ahmad M. Almatrafi
- Department of Biology, College of Science, Taibah University, Almadinah, Saudi Arabia
| | - Alia M. Albalawi
- Center for Genetics and Inherited Diseases, Taibah University, Almadinah, Saudi Arabia
- Department of Biology, College of Science, King Abdulaziz University, Jeddah, Saudi Arabia
| | - Sulman Basit
- Center for Genetics and Inherited Diseases, Taibah University, Almadinah, Saudi Arabia
- * E-mail:
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Albarry MA, Alreheli AQ, Albalawi AM, Basit S. Whole genome genotyping mapped regions on chromosome 2 and 18 in a family segregating Waardenburg syndrome type II. Saudi J Ophthalmol 2020; 33:326-331. [PMID: 31920441 PMCID: PMC6950962 DOI: 10.1016/j.sjopt.2019.09.004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2019] [Revised: 04/01/2019] [Accepted: 09/10/2019] [Indexed: 11/17/2022] Open
Abstract
Objectives Waardenburg syndrome is a rare genetic disorder. It is characterized by sensorineural hearing impairment and pigment defects of the skin, hair and iris. In some cases abnormalities in the tissues derived from neural crest have also been reported. Mutations in several genes have been reported as an underlying cause of Waardenburg syndrome. Objective of this study is to identify the chromosomal region(s) associated with Waardenburg syndrome in an extended Saudi family. Methods Genomic DNA was extracted from fifteen individuals of a Saudi family segregating Waardenburg syndrome. Whole genome SNP genotyping was performed to identify common identity by descent chromosomal region(s) shared by affected individuals. Results Pedigree analysis confirm autosomal dominant inheritance of Waardenburg syndrome type II in a family. Whole genome SNP genotypes were analyzed using AutoSNPa and DominantMapper tools. Shared identity by descent chromosomal regions were identified on chromosome 2 and chromosome 18. Regions were checked for known Waardenburg syndrome genes. No known gene is present in both regions. Conclusions In summary, we identified novel chromosomal regions associated with Waardenburg syndrome type II in a Saudi family. Deep sequencing of a complete candidate regions are required to identify the gene underlying Waardenburg syndrome in this family.
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Affiliation(s)
- Maan Abdullah Albarry
- Department of Ophthalmology, College of Medicine, Taibah University Almadinah, Saudi Arabia
| | - Ahdab Qasem Alreheli
- Department of Ophthalmology, College of Medicine, Taibah University Almadinah, Saudi Arabia
| | - Alia M Albalawi
- Center for Genetics and Inherited Diseases, Taibah University Almadinah, Saudi Arabia
| | - Sulman Basit
- Center for Genetics and Inherited Diseases, Taibah University Almadinah, Saudi Arabia
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Abstract
Melanocyte development is orchestrated by a complex interconnecting regulatory network of genes and synergistic interactions. Piebaldism and Waardenburg syndrome are neurocristopathies that arise from mutations in genes involved in this complex network. Our understanding of melanocyte development, Piebaldism, and Waardenburg syndrome has improved dramatically over the past decade. The diagnosis and classification of Waardenburg syndrome, first proposed in 1992 and based on phenotype, have expanded over the past three decades to include genotype. This review focuses on the current understanding of human melanocyte development and the evaluation and management of Piebaldism and Waardenburg syndrome. Management is often challenging and requires a multidisciplinary approach.
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Bondurand N, Dufour S, Pingault V. News from the endothelin-3/EDNRB signaling pathway: Role during enteric nervous system development and involvement in neural crest-associated disorders. Dev Biol 2018; 444 Suppl 1:S156-S169. [PMID: 30171849 DOI: 10.1016/j.ydbio.2018.08.014] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2018] [Revised: 08/27/2018] [Accepted: 08/27/2018] [Indexed: 01/08/2023]
Abstract
The endothelin system is a vertebrate-specific innovation with important roles in regulating the cardiovascular system and renal and pulmonary processes, as well as the development of the vertebrate-specific neural crest cell population and its derivatives. This system is comprised of three structurally similar 21-amino acid peptides that bind and activate two G-protein coupled receptors. In 1994, knockouts of the Edn3 and Ednrb genes revealed their crucial function during development of the enteric nervous system and melanocytes, two neural-crest derivatives. Since then, human and mouse genetics, combined with cellular and developmental studies, have helped to unravel the role of this signaling pathway during development and adulthood. In this review, we will summarize the known functions of the EDN3/EDNRB pathway during neural crest development, with a specific focus on recent scientific advances, and the enteric nervous system in normal and pathological conditions.
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Affiliation(s)
- Nadege Bondurand
- Laboratory of Embryology and Genetics of Congenital Malformations, INSERM U1163, Institut Imagine, Paris, France; Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France.
| | - Sylvie Dufour
- INSERM, U955, Equipe 06, Créteil 94000, France; Université Paris Est, Faculté de Médecine, Créteil 94000, France
| | - Veronique Pingault
- Laboratory of Embryology and Genetics of Congenital Malformations, INSERM U1163, Institut Imagine, Paris, France; Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France; Service de Génétique Moléculaire, Hôpital Necker-Enfants Malades, Assistance Publique - Hôpitaux de Paris, Paris, France
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Zhang JR, Zhang ZB. [Syndromic Hirschsprung′s disease and its mode of inheritance]. ZHONGGUO DANG DAI ER KE ZA ZHI = CHINESE JOURNAL OF CONTEMPORARY PEDIATRICS 2018; 20:428-432. [PMID: 29764583 PMCID: PMC7389055 DOI: 10.7499/j.issn.1008-8830.2018.05.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 12/01/2017] [Accepted: 03/06/2018] [Indexed: 06/08/2023]
Abstract
Hirschsprung′s disease (HSCR) is one of the major causes of chronic incomplete intestinal obstruction in children. HSCR is considered a type of neurocristopathy caused by no colonization of ganglion cells on some parts of the bowel wall due to abnormal termination of the migration of vagal neural cells during embryonic development. This disease can be classified into different types according to the length of the affected intestinal canal. Most HSCR patients present with single deformity, but some HSCR patients are affected by other deformities, which constitutes syndromic HSCR, such as congenital central hypoventilation syndrome, Fryns syndrome, and cartilage-hair hypoplasia syndrome. Most syndromes have abnormal genetic material. An adequate knowledge of syndromic HSCR is of vital importance for accurate diagnosis and prognostic evaluation. This article reviews the clinical manifestations, genetic basis, and genetic modes of different types of syndromic HSCR.
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Affiliation(s)
- Jing-Ru Zhang
- Department of Neonatal Surgery, Shengjing Hospital of China Medical University, Shenyang 110003, China.
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Li H, Jin P, Hao Q, Zhu W, Chen X, Wang P. Identification of a Novel De Novo Heterozygous Deletion in the SOX10 Gene in Waardenburg Syndrome Type II Using Next-Generation Sequencing. Genet Test Mol Biomarkers 2017; 21:681-685. [PMID: 29045167 DOI: 10.1089/gtmb.2016.0421] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
OBJECTIVES Waardenburg syndrome (WS) is a rare autosomal dominant disorder associated with pigmentation abnormalities and sensorineural hearing loss. In this study, we investigated the genetic cause of WSII in a patient and evaluated the reliability of the targeted next-generation exome sequencing method for the genetic diagnosis of WS. METHODS Clinical evaluations were conducted on the patient and targeted next-generation sequencing (NGS) was used to identify the candidate genes responsible for WSII. Multiplex ligation-dependent probe amplification (MLPA) and real-time quantitative polymerase chain reaction (qPCR) were performed to confirm the targeted NGS results. RESULTS Targeted NGS detected the entire deletion of the coding sequence (CDS) of the SOX10 gene in the WSII patient. MLPA results indicated that all exons of the SOX10 heterozygous deletion were detected; no aberrant copy number in the PAX3 and microphthalmia-associated transcription factor (MITF) genes was found. Real-time qPCR results identified the mutation as a de novo heterozygous deletion. CONCLUSIONS This is the first report of using a targeted NGS method for WS candidate gene sequencing; its accuracy was verified by using the MLPA and qPCR methods. Our research provides a valuable method for the genetic diagnosis of WS.
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Affiliation(s)
- Haonan Li
- 1 Department of Otolaryngology-Head and Neck Surgery, First Hospital of Jilin University , Changchun, China
| | - Peng Jin
- 1 Department of Otolaryngology-Head and Neck Surgery, First Hospital of Jilin University , Changchun, China
| | - Qian Hao
- 2 Department of Ophthalmology, First Hospital of Jilin University , Changchun, China
| | - Wei Zhu
- 1 Department of Otolaryngology-Head and Neck Surgery, First Hospital of Jilin University , Changchun, China
| | - Xia Chen
- 3 Department of Pharmacology, College of Basic Medical Sciences, Jilin University , Changchun, China
| | - Ping Wang
- 1 Department of Otolaryngology-Head and Neck Surgery, First Hospital of Jilin University , Changchun, China
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Issa S, Bondurand N, Faubert E, Poisson S, Lecerf L, Nitschke P, Deggouj N, Loundon N, Jonard L, David A, Sznajer Y, Blanchet P, Marlin S, Pingault V. EDNRB mutations cause Waardenburg syndrome type II in the heterozygous state. Hum Mutat 2017; 38:581-593. [PMID: 28236341 DOI: 10.1002/humu.23206] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2016] [Revised: 02/02/2017] [Accepted: 02/18/2017] [Indexed: 01/21/2023]
Abstract
Waardenburg syndrome (WS) is a genetic disorder characterized by sensorineural hearing loss and pigmentation anomalies. The clinical definition of four WS types is based on additional features due to defects in structures mostly arising from the neural crest, with type I and type II being the most frequent. While type I is tightly associated to PAX3 mutations, WS type II (WS2) remains partly enigmatic with mutations in known genes (MITF, SOX10) accounting for only 30% of the cases. We performed exome sequencing in a WS2 index case and identified a heterozygous missense variation in EDNRB. Interestingly, homozygous (and very rare heterozygous) EDNRB mutations are already described in type IV WS (i.e., in association with Hirschsprung disease [HD]) and heterozygous mutations in isolated HD. Screening of a WS2 cohort led to the identification of an overall of six heterozygous EDNRB variations. Clinical phenotypes, pedigrees and molecular segregation investigations unraveled a dominant mode of inheritance with incomplete penetrance. In parallel, cellular and functional studies showed that each of the mutations impairs the subcellular localization of the receptor or induces a defective downstream signaling pathway. Based on our results, we now estimate EDNRB mutations to be responsible for 5%-6% of WS2.
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Affiliation(s)
- Sarah Issa
- INSERM U955, IMRB, Equipe 6, Créteil, France.,Université Paris 12, Faculté de Médecine, Créteil, France.,INSERM U1163, Institut IMAGINE, Equipe Embryologie et Génétique des Malformations Humaines, Paris, France
| | - Nadege Bondurand
- INSERM U955, IMRB, Equipe 6, Créteil, France.,Université Paris 12, Faculté de Médecine, Créteil, France.,INSERM U1163, Institut IMAGINE, Equipe Embryologie et Génétique des Malformations Humaines, Paris, France
| | - Emmanuelle Faubert
- AP-HP, Groupe Henri Mondor-Albert Chenevier, Département de Génétique, Créteil, France
| | - Sylvain Poisson
- AP-HP, Hôpital Necker, Laboratoire de Génétique Moléculaire, Paris, France
| | - Laure Lecerf
- INSERM U955, IMRB, Equipe 6, Créteil, France.,Université Paris 12, Faculté de Médecine, Créteil, France
| | | | - Naima Deggouj
- ENT Department and Audio-Phonological Center, Cliniques universitaires St Luc, Université catholique de Louvain, Brussels, Belgium
| | | | - Laurence Jonard
- AP-HP, Hôpital Necker, Laboratoire de Génétique Moléculaire, Paris, France.,AP-HP, Centre de référence «Surdités génétiques», Hôpital Necker, Paris, France
| | - Albert David
- Centre hospitalier universitaire de Nantes, Service de Génétique Médicale, Nantes, France
| | - Yves Sznajer
- Centre de génétique humaine, Cliniques universitaires Saint-Luc, Université catholique de Louvain, Brussels, Belgium
| | - Patricia Blanchet
- Centre Hospitalier Universitaire de Montpellier, Département de Génétique Médicale, Montpellier, France
| | - Sandrine Marlin
- INSERM U1163, Institut IMAGINE, Equipe Embryologie et Génétique des Malformations Humaines, Paris, France.,AP-HP, Centre de référence «Surdités génétiques», Hôpital Necker, Paris, France
| | - Veronique Pingault
- INSERM U955, IMRB, Equipe 6, Créteil, France.,INSERM U1163, Institut IMAGINE, Equipe Embryologie et Génétique des Malformations Humaines, Paris, France.,AP-HP, Groupe Henri Mondor-Albert Chenevier, Département de Génétique, Créteil, France.,AP-HP, Hôpital Necker, Laboratoire de Génétique Moléculaire, Paris, France.,Université Paris-Descartes, Faculté de Médecine, Paris, France
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13
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Oiso N, Sakai K, Nishio K, Kawada A. Phylloid hypomelanosis associated with a mosaic trisomy 13 in the 13q31.3-qter region: atypical phylloid distribution and typical hypomelanosis. Pigment Cell Melanoma Res 2017; 30:269-272. [DOI: 10.1111/pcmr.12566] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Naoki Oiso
- Department of Dermatology; Kindai University Faculty of Medicine; Osaka-Sayama Japan
| | - Kazuko Sakai
- Department of Genome Biology; Kindai University Faculty of Medicine; Osaka-Sayama Japan
| | - Kazuto Nishio
- Department of Genome Biology; Kindai University Faculty of Medicine; Osaka-Sayama Japan
| | - Akira Kawada
- Department of Dermatology; Kindai University Faculty of Medicine; Osaka-Sayama Japan
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14
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Wang X, Zhu Y, Shen N, Peng J, Wang C, Liu H, Lu Y. A de novo deletion mutation in SOX10 in a Chinese family with Waardenburg syndrome type 4. Sci Rep 2017; 7:41513. [PMID: 28128317 PMCID: PMC5269737 DOI: 10.1038/srep41513] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2016] [Accepted: 12/21/2016] [Indexed: 12/15/2022] Open
Abstract
Waardenburg syndrome type 4 (WS4) or Waardenburg-Shah syndrome is a rare genetic disorder with a prevalence of <1/1,000,000 and characterized by the association of congenital sensorineural hearing loss, pigmentary abnormalities, and intestinal aganglionosis. There are three types of WS4 (WS4A–C) caused by mutations in endothelin receptor type B, endothelin 3, and SRY-box 10 (SOX10), respectively. This study investigated a genetic mutation in a Chinese family with one WS4 patient in order to improve genetic counselling. Genomic DNA was extracted, and mutation analysis of the three WS4 related genes was performed using Sanger sequencing. We detected a de novo heterozygous deletion mutation [c.1333delT (p.Ser445Glnfs*57)] in SOX10 in the patient; however, this mutation was absent in the unaffected parents and 40 ethnicity matched healthy controls. Subsequent phylogenetic analysis and three-dimensional modelling of the SOX10 protein confirmed that the c.1333delT heterozygous mutation was pathogenic, indicating that this mutation might constitute a candidate disease-causing mutation.
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Affiliation(s)
- Xiong Wang
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yaowu Zhu
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Na Shen
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Jing Peng
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Chunyu Wang
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Haiyi Liu
- Department of Obstetrics and Gynecology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Yanjun Lu
- Department of Laboratory Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
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15
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Sergi CM, Caluseriu O, McColl H, Eisenstat DD. Hirschsprung's disease: clinical dysmorphology, genes, micro-RNAs, and future perspectives. Pediatr Res 2017; 81:177-191. [PMID: 27682968 DOI: 10.1038/pr.2016.202] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2016] [Accepted: 09/05/2016] [Indexed: 01/17/2023]
Abstract
On the occasion of the 100th anniversary of Dr. Harald Hirschsprung's death, there is a worldwide significant research effort toward identifying and understanding the role of genes and biochemical pathways involved in the pathogenesis as well as the use of new therapies for the disease harboring his name (Hirschsprung disease, HSCR). HSCR (aganglionic megacolon) is a frequent diagnostic and clinical challenge in perinatology and pediatric surgery, and a major cause of neonatal intestinal obstruction. HSCR is characterized by the absence of ganglia of the enteric nervous system, mostly in the distal gastrointestinal tract. This review focuses on current understanding of genes and pathways associated with HSCR and summarizes recent knowledge related to micro RNAs (miRNAs) and HSCR pathogenesis. While commonly sporadic, Mendelian patterns of inheritance have been described in syndromic cases with HSCR. Although only half of the patients with HSCR have mutations in specific genes related to early embryonic development, recent pathway-based analysis suggests that gene modules with common functions may be associated with HSCR in different populations. This comprehensive profile of functional gene modules may serve as a useful resource for future developmental, biochemical, and genetic studies providing insights into the complex nature of HSCR.
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Affiliation(s)
- Consolato Maria Sergi
- Department of Orthopedics, Wuhan University of Science and Technology, Hubei, P.R. China.,Department of Laboratory Medicine and Pathology, University of Alberta, Edmonton, Alberta, Canada.,Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
| | - Oana Caluseriu
- Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada.,Department of Medical Genetics, University of Alberta, Edmonton, Alberta, Canada
| | - Hunter McColl
- Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
| | - David D Eisenstat
- Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada.,Department of Medical Genetics, University of Alberta, Edmonton, Alberta, Canada
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