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Wang S, Lin Y, Liang P, Li Q, Li W, Wang Z, Wang J, Chen J, Zha D. De novo Splice Site Mutation of the CHD7 Gene in a Chinese Patient with Typical CHARGE Syndrome. ORL J Otorhinolaryngol Relat Spec 2022; 84:417-424. [PMID: 35078197 DOI: 10.1159/000520376] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Accepted: 08/26/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION CHARGE syndrome (CS, OMIM 214800) is a rare genetic disease characterized by multiple congenital abnormalities, including coloboma, heart defect, atresia of the choanae, retardation of development, genital anomalies, and ear anomalies/deafness. The syndrome is mainly caused by a heterozygous variant in the chromodomain helicase DNA-binding protein 7 (CHD7) gene that encodes the CHD7 protein, involved in the ATP-dependent remodeling of chromatin. METHODS In this study, the next-generation sequencing targeted panel was used to detect a de novo variant c.3523-2A>G in the CHD7 gene in a patient with severe CS, congenital heart disease, left coloboma of the choroid, cryptorchidism, and congenital deafness. The Sanger sequencing confirmed the variant and clarified it as de novo variant by short tandem repeat analysis in the patient family. We analyzed the effect of a variant by Minigene assay to evaluate the pathogenicity of the variant. RESULTS In summary, cDNA analysis confirmed that c.3523-2A>G variant activates a cryptic splice site, resulting in 172 base pair missing in exon 15, leading to the premature truncation of the CHD7 protein (p.V1175Afs*11). CONCLUSION The present study functionally characterized the novel c.3523-2A>G variant in CHD7, providing further confirmatory evidence that it is associated with CS.
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Affiliation(s)
- Shujuan Wang
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, China,
| | - Ying Lin
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, China
| | - Pengfei Liang
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, China
| | - Qiong Li
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, China
| | - Wei Li
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, China
| | - Zhaoxia Wang
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, China
| | - Jian Wang
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, China
| | - Jun Chen
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, China
| | - Dingjun Zha
- Department of Otolaryngology and Head and Neck Surgery, Xijing Hospital, Air Force Military Medical University, Xi'an, China
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Park JM, Lee B, Kim JH, Park SY, Yu J, Kim UK, Park JS. An autosomal dominant ERLIN2 mutation leads to a pure HSP phenotype distinct from the autosomal recessive ERLIN2 mutations (SPG18). Sci Rep 2020; 10:3295. [PMID: 32094424 PMCID: PMC7039913 DOI: 10.1038/s41598-020-60374-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2019] [Accepted: 02/03/2020] [Indexed: 12/17/2022] Open
Abstract
Hereditary spastic paraplegia (HSP) is a heterogeneous inherited disorder that manifests with lower extremity weakness and spasticity. HSP can be inherited by autosomal dominant, autosomal recessive, and X-linked inheritance patterns. Recent studies have shown that, although rare, mutations in a single gene can lead to multiple patterns of inheritance of HSP. We enrolled the HSP family showing autosomal dominant inheritance and performed genetic study to find the cause of phenotype in this family. We recruited five members of a Korean family as study participants. Four of the five family members had pure HSP. Part of the family members underwent whole-exome sequencing (WES) to identify the causative mutation. As the result of WES and Sanger sequencing analysis, a novel missense mutation (c.452 C > T, p.Ala151Val) of ERLIN2 gene was identified as the cause of the autosomal dominant HSP in the family. Our study suggests that the ERLIN2 gene leads to both autosomal recessive and autosomal dominant patterns of inheritance in HSP. Moreover, autosomal dominant HSP caused by ERLIN2 appears to cause pure HSP in contrast to autosomal recessive ERLIN2 related complicated HSP (SPG18).
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Affiliation(s)
- Jin-Mo Park
- Department of Neurology, Dongguk University College of Medicine, Dongguk Unversity Gyeongju Hospital, Gyeongju, Republic of Korea
| | - Byeonghyeon Lee
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea.,School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Republic of Korea
| | - Jong-Heun Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea.,School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Republic of Korea
| | - Seong-Yong Park
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea.,School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Republic of Korea
| | - Jinhoon Yu
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea.,School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Republic of Korea
| | - Un-Kyung Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, Republic of Korea. .,School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, Republic of Korea.
| | - Jin-Sung Park
- Department of Neurology, School of medicine, Kyungpook National University, Kyungpook National University Chilgok hospital, Daegu, Republic of Korea.
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Xu YP, Shi LP, Zhu J. Atypical CHARGE associated with a novel frameshift mutation of CHD7 in a Chinese neonatal patient. BMC Pediatr 2018; 18:203. [PMID: 29945602 PMCID: PMC6020284 DOI: 10.1186/s12887-018-1181-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2017] [Accepted: 06/18/2018] [Indexed: 01/12/2023] Open
Abstract
BACKGROUND CHARGE syndrome is an autosomal dominant malformation disorder caused by heterozygous loss of function mutations in the chromatin remodeler CHD7, which has been estimated to occur in 1:10,000 births worldwide. It is a genetic disorder closely resembles other pattern of anomalies. Genetic testing should be pointed out as a useful method for clinical diagnosis. CASE PRESENTATION A female infant was the second child born to a 33-year-old, gravida 3, para 2 mother. The infant was born at 37 + 4 weeks of gestation with a birth weight of 2440 g (- 1.1 S.D.). Clinical examination showed atypical CHARGE syndrome, with choanal atresia, a heart defect, and sensorineural deafness. Genomic DNA was extracted from peripheral venous blood sample using molecular biological technique. We used the Illumina TruSigt One sequencing panel on the MiSeq next- generation sequencing (NGS) platform for mutation screening and found a novel frameshift mutation in chromodomain helicase DNA binding protein 7 (CHD7; c.4656dupT). This mutation results in a new reading frame ending in p.(Ile1553fs). At the first month of age, the patient had a posterior nostril plasty operation by nasal endoscope. At the second month of age, she had patent ductus arteriosus ligation surgery. At the 4th month of age, she was discharged from the hospital. CONCLUSIONS Our findings further reveal that patients should not be rejected for CHD7 mutational analysis even if they do not fulfill CHARGE syndrome Verloes criteria.
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Affiliation(s)
- Yan-Ping Xu
- NICU, Children's Hospital, Zhejiang University School of Medicine, Hangzhou, 310053, China.
| | - Li-Ping Shi
- NICU, Children's Hospital, Zhejiang University School of Medicine, Hangzhou, 310053, China
| | - Jiajun Zhu
- Department of Neonatology, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, 310006, China.
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Villate O, Ibarluzea N, Fraile-Bethencourt E, Valenzuela A, Velasco EA, Grozeva D, Raymond FL, Botella MP, Tejada MI. Functional Analyses of a Novel Splice Variant in the CHD7 Gene, Found by Next Generation Sequencing, Confirm Its Pathogenicity in a Spanish Patient and Diagnose Him with CHARGE Syndrome. Front Genet 2018; 9:7. [PMID: 29434620 PMCID: PMC5790995 DOI: 10.3389/fgene.2018.00007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2017] [Accepted: 01/08/2018] [Indexed: 01/30/2023] Open
Abstract
Mutations in CHD7 have been shown to be a major cause of CHARGE syndrome, which presents many symptoms and features common to other syndromes making its diagnosis difficult. Next generation sequencing (NGS) of a panel of intellectual disability related genes was performed in an adult patient without molecular diagnosis. A splice donor variant in CHD7 (c.5665 + 1G > T) was identified. To study its potential pathogenicity, exons and flanking intronic sequences were amplified from patient DNA and cloned into the pSAD® splicing vector. HeLa cells were transfected with this construct and a wild-type minigene and functional analysis were performed. The construct with the c.5665 + 1G > T variant produced an aberrant transcript with an insert of 63 nucleotides of intron 28 creating a premature termination codon (TAG) 25 nucleotides downstream. This would lead to the insertion of 8 new amino acids and therefore a truncated 1896 amino acid protein. As a result of this, the patient was diagnosed with CHARGE syndrome. Functional analyses underline their usefulness for studying the pathogenicity of variants found by NGS and therefore its application to accurately diagnose patients.
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Affiliation(s)
- Olatz Villate
- Biocruces Health Research Institute, Barakaldo, Spain.,Molecular Genetics Laboratory, Genetics Service, Cruces University Hospital, Barakaldo, Spain
| | | | - Eugenia Fraile-Bethencourt
- Splicing and Cancer Laboratory, Instituto de BiologĂa y GenĂ©tica Molecular, Consejo Superior de Investigaciones CientĂficas, Universidad de Valladolid, Valladolid, Spain
| | - Alberto Valenzuela
- Splicing and Cancer Laboratory, Instituto de BiologĂa y GenĂ©tica Molecular, Consejo Superior de Investigaciones CientĂficas, Universidad de Valladolid, Valladolid, Spain
| | - Eladio A Velasco
- Splicing and Cancer Laboratory, Instituto de BiologĂa y GenĂ©tica Molecular, Consejo Superior de Investigaciones CientĂficas, Universidad de Valladolid, Valladolid, Spain
| | - Detelina Grozeva
- Department of Medical Genetics, Cambridge Institute for Medical Research, University of Cambridge, Cambridge, United Kingdom
| | - F L Raymond
- Department of Medical Genetics, Cambridge Institute for Medical Research, University of Cambridge, Cambridge, United Kingdom
| | - MarĂa P Botella
- Department of Pediatrics, Araba University Hospital, Vitoria, Spain
| | - MarĂa-Isabel Tejada
- Biocruces Health Research Institute, Barakaldo, Spain.,Molecular Genetics Laboratory, Genetics Service, Cruces University Hospital, Barakaldo, Spain.,Clinical Group, Centro de Investigación Biomédica en Red de Enfermedades Raras, Madrid, Spain
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5
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Legendre M, Abadie V, Attié-Bitach T, Philip N, Busa T, Bonneau D, Colin E, Dollfus H, Lacombe D, Toutain A, Blesson S, Julia S, Martin-Coignard D, Geneviève D, Leheup B, Odent S, Jouk PS, Mercier S, Faivre L, Vincent-Delorme C, Francannet C, Naudion S, Mathieu-Dramard M, Delrue MA, Goldenberg A, Héron D, Parent P, Touraine R, Layet V, Sanlaville D, Quélin C, Moutton S, Fradin M, Jacquette A, Sigaudy S, Pinson L, Sarda P, Guerrot AM, Rossi M, Masurel-Paulet A, El Chehadeh S, Piguel X, Rodriguez-Ballesteros M, Ragot S, Lyonnet S, Bilan F, Gilbert-Dussardier B. Phenotype and genotype analysis of a French cohort of 119 patients with CHARGE syndrome. AMERICAN JOURNAL OF MEDICAL GENETICS PART C-SEMINARS IN MEDICAL GENETICS 2017; 175:417-430. [DOI: 10.1002/ajmg.c.31591] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2017] [Revised: 10/05/2017] [Accepted: 10/09/2017] [Indexed: 11/06/2022]
Affiliation(s)
- Marine Legendre
- Service de Génétique, CHU de Poitiers; Poitiers France
- EA 3808, Université de Poitiers; Poitiers France
| | - VĂ©ronique Abadie
- Service de Pédiatrie Générale, Hôpital Universitaire Necker-Enfants Malades, AP-HP; Paris France
- Unité INSERM 1178/1018-CESP, Université Paris Descartes; Paris France
| | - Tania Attié-Bitach
- INSERM U1163, Laboratoire d'Embryologie et de Génétique des Malformations Congénitales; Sorbonne Paris Cité et Institut Imagine, Université Paris Descartes; Paris France
- Département de Génétique; Hôpital Universitaire Necker-Enfants Malades; AP-HP Paris France
| | | | | | | | | | | | - Didier Lacombe
- Service de Génétique, CHU de Bordeaux, INSERM U1211, Université de Bordeaux; Bordeaux France
| | | | | | - Sophie Julia
- Service de Génétique, CHU de Toulouse; Toulouse France
| | | | - David Geneviève
- Service de Génétique Clinique, Département de génétique médicale, maladies rares et médecine personnalisée, Unité Inserm U1183, Université Montpellier, CHU Montpellier; Montpellier France
| | - Bruno Leheup
- Service de Génétique, CHU de Nancy; Nancy France
| | - Sylvie Odent
- Service de Génétique, CHU de Rennes; Rennes France
| | | | | | - Laurence Faivre
- Centre de Référence Anomalies du Développement et Syndromes Malformatifs, FHU TRANSLAD, Hôpital d'Enfants, CHU Dijon; Dijon France
| | | | | | - Sophie Naudion
- Service de Génétique, CHU de Bordeaux, INSERM U1211, Université de Bordeaux; Bordeaux France
| | | | - Marie-Ange Delrue
- Service de Génétique, CHU de Bordeaux, INSERM U1211, Université de Bordeaux; Bordeaux France
| | | | - Delphine HĂ©ron
- Service de Génétique, CHU Pitié-Salpêtrière, AP-HP; Paris France
| | | | - Renaud Touraine
- Service de Génétique, CHU de Saint-Etienne; Saint-Etienne France
| | | | | | | | - SĂ©bastien Moutton
- Service de Génétique, CHU de Bordeaux, INSERM U1211, Université de Bordeaux; Bordeaux France
| | | | | | | | - Lucile Pinson
- Service de Génétique Clinique, Département de génétique médicale, maladies rares et médecine personnalisée, Unité Inserm U1183, Université Montpellier, CHU Montpellier; Montpellier France
| | - Pierre Sarda
- Service de Génétique Clinique, Département de génétique médicale, maladies rares et médecine personnalisée, Unité Inserm U1183, Université Montpellier, CHU Montpellier; Montpellier France
| | | | | | - Alice Masurel-Paulet
- Centre de Référence Anomalies du Développement et Syndromes Malformatifs, FHU TRANSLAD, Hôpital d'Enfants, CHU Dijon; Dijon France
| | - Salima El Chehadeh
- Centre de Référence Anomalies du Développement et Syndromes Malformatifs, FHU TRANSLAD, Hôpital d'Enfants, CHU Dijon; Dijon France
| | - Xavier Piguel
- Service d'Endocrinologie, CHU de Poitiers; Poitiers France
| | | | - Stéphanie Ragot
- Centre d'Investigation Clinique, CHU de Poitiers; Poitiers France
- INSERM CIC 1402; Poitiers France
| | - Stanislas Lyonnet
- INSERM U1163, Laboratoire d'Embryologie et de Génétique des Malformations Congénitales; Sorbonne Paris Cité et Institut Imagine, Université Paris Descartes; Paris France
- Département de Génétique; Hôpital Universitaire Necker-Enfants Malades; AP-HP Paris France
| | - Frédéric Bilan
- Service de Génétique, CHU de Poitiers; Poitiers France
- EA 3808, Université de Poitiers; Poitiers France
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