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Gug C, Gorduza EV, Lăcătuşu A, Vaida MA, Bîrsăşteanu F, Puiu M, Stoicănescu D. CHARGE syndrome associated with de novo (I1460Rfs *15) frameshift mutation of CHD7 gene in a patient with arteria lusoria and horseshoe kidney. Exp Ther Med 2020; 20:479-485. [PMID: 32509017 PMCID: PMC7271729 DOI: 10.3892/etm.2020.8683] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Accepted: 03/02/2020] [Indexed: 12/22/2022] Open
Abstract
CHARGE syndrome is an autosomal dominant condition caused by mutations in the chromodomain helicase DNA binding protein 7 (CHD7) gene. The present study reported on the case of a 16-month-old female with plurimalformative syndrome, whose etiology was identified by clinical whole-exome sequencing (WES) analysis. Clinical and follow-up assessments identified multiple craniofacial dysmorphisms, congenital defects and functional symptoms, including dysphagia and Marcus Gunn jaw winking synkinesis. Trio-WES analysis was performed for the patient and their parents and the presence of CHARGE syndrome was further indicated using single-molecule real-time sequencing. A de novo pathogenic variant, c.4379_4380del (p.Ile1460Argfs*15), was identified in exon 19 of the CHD7 gene, which resulted in a premature translational stop signal. Trio-WES analysis was used for further investigation, indicating that neither of the patient's parents had the mutation and confirming its de novo nature. To the best of our knowledge, the case of the present study was the first reported case of CHARGE syndrome in Romania with congenital defects including an aberrant right subclavian artery and a horseshoe kidney. CHARGE syndrome was diagnosed in the patient based on the pathogenic mutation in the CHD7 gene. To the best of our knowledge, the present case report is the first to suggest that the CHD7 gene variant is associated with CHARGE syndrome.
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Affiliation(s)
- Cristina Gug
- Department of Microscopic Morphology, Victor Babeş University of Medicine and Pharmacy, 300041 Timisoara, Romania
| | - Eusebiu Vlad Gorduza
- Prenatal Diagnosis Department, Cuza Voda Obstetrics-Gynecology Clinical Hospital, 700038 Iasi, Romania.,Department of Medical Genetics, Grigore T. Popa University of Medicine and Pharmacy, 700115 Iasi, Romania
| | - Adrian Lăcătuşu
- Department of Pediatrics, Victor Babeş University of Medicine and Pharmacy, 300041 Timisoara, Romania
| | - Monica Adriana Vaida
- Department of Anatomy and Embryology, Victor Babeş University of Medicine and Pharmacy, 300041 Timisoara, Romania
| | - Florin Bîrsăşteanu
- Department of Radiology and Medical Imaging, Victor Babeş University of Medicine and Pharmacy, 300041 Timisoara, Romania
| | - Maria Puiu
- Department of Microscopic Morphology, Victor Babeş University of Medicine and Pharmacy, 300041 Timisoara, Romania
| | - Dorina Stoicănescu
- Department of Microscopic Morphology, Victor Babeş University of Medicine and Pharmacy, 300041 Timisoara, Romania
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Platt JL, Kent NA, Kimmel AR, Harwood AJ. Regulation of nucleosome positioning by a CHD Type III chromatin remodeler and its relationship to developmental gene expression in Dictyostelium. Genome Res 2017; 27:591-600. [PMID: 28330902 PMCID: PMC5378177 DOI: 10.1101/gr.216309.116] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2016] [Accepted: 02/27/2017] [Indexed: 01/14/2023]
Abstract
Nucleosome placement and repositioning can direct transcription of individual genes; however, the precise interactions of these events are complex and largely unresolved at the whole-genome level. The Chromodomain-Helicase-DNA binding (CHD) Type III proteins are a subfamily of SWI2/SNF2 proteins that control nucleosome positioning and are associated with several complex human disorders, including CHARGE syndrome and autism. Type III CHDs are required for multicellular development of animals and Dictyostelium but are absent in plants and yeast. These CHDs can mediate nucleosome translocation in vitro, but their in vivo mechanism is unknown. Here, we use genome-wide analysis of nucleosome positioning and transcription profiling to investigate the in vivo relationship between nucleosome positioning and gene expression during development of wild-type (WT) Dictyostelium and mutant cells lacking ChdC, a Type III CHD protein ortholog. We demonstrate major nucleosome positional changes associated with developmental gene regulation in WT. Loss of chdC caused an increase of intragenic nucleosome spacing and misregulation of gene expression, affecting ∼50% of the genes that are repositioned during WT development. These analyses demonstrate active nucleosome repositioning during Dictyostelium multicellular development, establish an in vivo function of CHD Type III chromatin remodeling proteins in this process, and reveal the detailed relationship between nucleosome positioning and gene regulation, as cells transition between developmental states.
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Affiliation(s)
- James L Platt
- School of Biosciences, Cardiff University, Cardiff, CF10 3AX, United Kingdom.,Laboratory of Cellular and Developmental Biology, National Institutes of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Nicholas A Kent
- School of Biosciences, Cardiff University, Cardiff, CF10 3AX, United Kingdom
| | - Alan R Kimmel
- Laboratory of Cellular and Developmental Biology, National Institutes of Diabetes and Digestive and Kidney Diseases, National Institutes of Health, Bethesda, Maryland 20892, USA
| | - Adrian J Harwood
- School of Biosciences, Cardiff University, Cardiff, CF10 3AX, United Kingdom.,Neuroscience and Mental Health Research Institute, Cardiff University, Cardiff, CF24 4HQ, United Kingdom
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Bozkaya OG, Ataman E, Randa C, Cura DO, Gürsoy S, Aksel O, Ulgenalp A. Three novel mutations of CHD7 gene in two turkish patients with charge syndrome; A double point mutation and an insertion. Balkan J Med Genet 2016; 18:65-70. [PMID: 26929907 PMCID: PMC4768827 DOI: 10.1515/bjmg-2015-0007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
The CHARGE (coloboma, heart defects, atresia, retardation, genital, ear) syndrome is a genetic disease characterized by ocular coloboma, choanal atresia or stenosis and semicircular canal abnormalities. Most of the patients clinically diagnosed with CHARGE syndrome have mutations in chromodomain helicase DNA-binding protein 7 (CHD7) gene. The CHD7 gene is located on chromosome 8q12.1, and up to now, there are more than 500 pathogenic mutations identified in the literature. We report two patients diagnosed with CHARGE syndrome with two novel mutations in the CHD7 gene: the first patient has double consecutive novel mutations in three adjacent codons, and the other has a novel insertion.
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Affiliation(s)
- O Giray Bozkaya
- Department of Pediatrics, Division of Genetics, Faculty of Medicine, Dokuz Eylul University, Inciralti, Izmir 35340, Turkey
| | - E Ataman
- Department of Pediatrics, Division of Genetics, Faculty of Medicine, Dokuz Eylul University, Inciralti, Izmir 35340, Turkey
| | - C Randa
- Department of Pediatrics, Division of Genetics, Faculty of Medicine, Dokuz Eylul University, Inciralti, Izmir 35340, Turkey
| | - D Onur Cura
- Department of Pediatrics, Division of Genetics, Faculty of Medicine, Dokuz Eylul University, Inciralti, Izmir 35340, Turkey
| | - S Gürsoy
- Department of Pediatrics, Division of Genetics, Faculty of Medicine, Dokuz Eylul University, Inciralti, Izmir 35340, Turkey
| | - O Aksel
- Department of Pediatrics, Division of Genetics, Faculty of Medicine, Dokuz Eylul University, Inciralti, Izmir 35340, Turkey
| | - A Ulgenalp
- Department of Pediatrics, Division of Genetics, Faculty of Medicine, Dokuz Eylul University, Inciralti, Izmir 35340, Turkey
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