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Kaya I. Detection of 4p16.3 deletion and 11p15.5p15.4 gain in a boy by comparative genomic hybridization array: A case report. World J Clin Cases 2024; 12:1517-1522. [PMID: 38576798 PMCID: PMC10989453 DOI: 10.12998/wjcc.v12.i8.1517] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Revised: 01/03/2024] [Accepted: 02/25/2024] [Indexed: 03/12/2024] Open
Abstract
BACKGROUND Nonallelic homologous recombination (NAHR) of segmental duplications or low copy repeats (LCRs) result in DNA gain/loss and play an important role in the origin of genomic disorders. CASE SUMMARY A 3-year- old boy was referred for genetic analysis. Comparative genomic hybridization array analysis revealed a loss of 3776 kb in the 4p16.3 chromosomal region and a gain of 3201 kb in the 11p15.5p15.4 chromosomal region. CONCLUSION Genomic imbalances caused by NAHR in LCRs result in deletion and duplication syndromes.
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Affiliation(s)
- Işın Kaya
- Medical Genetics, Bakırçay University Çiğli Education ve Training Hospital, İzmir 35620, Turkey
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2
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Paprocka J, Kaminiów K, Yetkin O, Tekturk P, Baykan B, Leiz S, Kluger G, Striano P. Clinical and epilepsy characteristics in Wolf-Hirschhorn syndrome (4p-): A review. Seizure 2024; 116:14-23. [PMID: 36526544 DOI: 10.1016/j.seizure.2022.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2022] [Revised: 11/23/2022] [Accepted: 12/07/2022] [Indexed: 12/13/2022] Open
Abstract
Wolf-Hirschhorn syndrome (WHS) is araredisorderwithan estimated prevalence being around 1 in 50,000 births. The syndrome is caused by the deletion of a critical region (Wolf-Hirschhorn Syndrome Critical region- WHSCR) on chromosome 4p16.3. WHS is clinically characterized by pre-and postnatal growth restriction, hypotonia, intellectual disability, craniofacial dysmorphismand congenital fusion anomalies. The clinical aspects are variable due to the deletion size.Consistently, epilepsy is one of the major concerns for parents and professionals caring for children with WHS. Seizures tend to occur in over 90% of patients, with onset within the first 3 years of life, and a peak incidence at around 6-12 months of age. Approximately 20% of patients had the first seizure onset within the first 6 months of age, almost 50% at 6 to 12 months of age and about 25% later than 12 months of age. The main types of epileptic seizures occurring in patients with WHS were generalized tonic-clonic seizures (around 70%). These were followed by tonic spasms (20%); focal seizures with impaired awareness (12%) and clonicseizures in 7% of patients.Seizures are often triggered by fever, followed by infections of various systems. Particularly, half of WHS patients experience status epilepticus in the first years of life, which can be fatal. Due to limited number of reports on the topic of EEG abnormalities in epilepsy among WHS patients, it is difficult to determine whether there are any characteristic deviations for WHS. Although more than 300 persons with WHS have been reported in the literature, there is sparse knowledge about epilepsy and methods of its anti-seizure medication (ASM) management with an assessment of their effectiveness. The purpose of this systematic review is to briefly summarize achievements and advances in the field of epilepsy in Wolf-Hirschhorn syndrome.
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Affiliation(s)
- Justyna Paprocka
- Pediatric Neurology Department, Faculty of Medical Sciences, Medical University of Silesia, Katowice, Poland.
| | - Konrad Kaminiów
- Students' Scientific Society, Pediatric Neurology Department, Faculty of Medical Sciences in Katowice, Medical University of Silesia, Katowice, Poland
| | - Ozgun Yetkin
- Department of Developmental Neurology, Poznań University of Medical Sciences, Poznań, Poland
| | - Pınar Tekturk
- Child Neurology and Neurology Departments, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Türkiy
| | - Betül Baykan
- Clinical Neurophysiology and Neurology Departments, Istanbul Faculty of Medicine, Istanbul University, Istanbul, Turkey
| | - Steffen Leiz
- Neuropädiatrie, KinderklinikDritter Orden, München, Germany
| | - Gerhard Kluger
- Institute for Transition, Rehabilitation and Palliation, Paracelsus Medical University, Salzburg, Austria; Center for Pediatric Neurology, Neurorehabilitation and Epileptology, Schoen KlinikVogtareuth, Vogtareuth, Germany
| | - Pasquale Striano
- IRCCS IstitutoGianninaGaslini", Genova, Italy; Department of Neurosciences, Rehabilitation, Ophthalmology, Genetics, Maternal and Child Health, University of Genova, Genova, Italy
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Xia C, Kumar D, You B, Streck DL, Osborne L, Dermody J, Jiang JG, Pletcher BA. Wolf-Hirschhorn Syndrome with Hyperparathyroidism: A Case Report and a Narrative Review of the Literature. J Pediatr Genet 2023; 12:312-317. [PMID: 38162156 PMCID: PMC10756731 DOI: 10.1055/s-0041-1729751] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Accepted: 03/24/2021] [Indexed: 10/21/2022]
Abstract
Wolf-Hirschhorn syndrome (WHS) is a contiguous gene deletion condition. The WHS core phenotype includes developmental delays, intellectual disabilities, seizures, and distinctive facial features. Various other comorbidities have also been reported, such as hearing loss, heart defects, as well as eye problems and kidney problems. In this report, we present a case of WHS accompanied by hyperparathyroidism and hypercalcemia, which has not been previously reported. A girl was born at 37 weeks of gestation by vaginal delivery. She was small for the gestational age (2,045 g) and admitted to neonatal intensive care unit. She had typical WHS facial features and was found to have bilateral small kidneys associated with transient metabolic acidosis and renal insufficiency. She had right-sided sensorineural hearing loss, a small atrial septal defect, and colpocephaly and hypoplasia of corpus callosum. She had a single seizure which was well controlled with an oral antiepileptic medication. Cytogenetic studies demonstrated a large terminal chromosome 4p deletion (21.4 Mb) and 4p duplication (2.1 Mb) adjacent to the deletion. A unique finding in this patient is her consistently elevated levels of parathyroid hormone and serum calcium, suggesting hyperparathyroidism. We present this rare case along with a review of the literature and hope to draw an attention to a potential relationship between WHS and hyperparathyroidism.
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Affiliation(s)
- Changqing Xia
- Institute of Medical Genetics and Genomics, Rutgers New Jersey Medical School, Newark, New Jersey, United States
| | - Dibyendu Kumar
- Institute of Medical Genetics and Genomics, Rutgers New Jersey Medical School, Newark, New Jersey, United States
| | - Bei You
- Institute of Medical Genetics and Genomics, Rutgers New Jersey Medical School, Newark, New Jersey, United States
| | - Deanna L. Streck
- Institute of Medical Genetics and Genomics, Rutgers New Jersey Medical School, Newark, New Jersey, United States
| | - Lisa Osborne
- Institute of Medical Genetics and Genomics, Rutgers New Jersey Medical School, Newark, New Jersey, United States
| | - James Dermody
- Institute of Medical Genetics and Genomics, Rutgers New Jersey Medical School, Newark, New Jersey, United States
| | - Jie-Gen Jiang
- Institute of Medical Genetics and Genomics, Rutgers New Jersey Medical School, Newark, New Jersey, United States
| | - Beth A. Pletcher
- Department of Pediatrics, Rutgers New Jersey Medical School, Newark, New Jersey, United States
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4
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Su D, Eliason S, Sun Z, Shao F, Amendt BA. Wolf-Hirschhorn syndrome candidate 1 (Whsc1) methyltransferase signals via a Pitx2-miR-23/24 axis to effect tooth development. J Biol Chem 2023; 299:105324. [PMID: 37806494 PMCID: PMC10656234 DOI: 10.1016/j.jbc.2023.105324] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 09/01/2023] [Accepted: 09/22/2023] [Indexed: 10/10/2023] Open
Abstract
Wolf-Hirschhorn syndrome (WHS) is a developmental disorder attributed to a partial deletion on the short arm of chromosome 4. WHS patients suffer from oral manifestations including cleft lip and palate, hypodontia, and taurodontism. WHS candidate 1 (WHSC1) gene is a H3K36-specific methyltransferase that is deleted in every reported case of WHS. Mutation in this gene also results in tooth anomalies in patients. However, the correlation between genetic abnormalities and the tooth anomalies has remained controversial. In our study, we aimed to clarify the role of WHSC1 in tooth development. We profiled the Whsc1 expression pattern during mouse incisor and molar development by immunofluorescence staining and found Whsc1 expression is reduced as tooth development proceeds. Using real-time quantitative reverse transcription PCR, Western blot, chromatin immunoprecipitation, and luciferase assays, we determined that Whsc1 and Pitx2, the initial transcription factor involved in tooth development, positively and reciprocally regulate each other through their gene promoters. miRNAs are known to regulate gene expression posttranscriptionally during development. We previously reported miR-23a/b and miR-24-1/2 were highly expressed in the mature tooth germ. Interestingly, we demonstrate here that these two miRs directly target Whsc1 and repress its expression. Additionally, this miR cluster is also negatively regulated by Pitx2. We show the expression of these two miRs and Whsc1 are inversely correlated during mouse mandibular development. Taken together, our results provide new insights into the potential role of Whsc1 in regulating tooth development and a possible molecular mechanism underlying the dental defects in WHS.
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Affiliation(s)
- Dan Su
- Department of Anatomy and Cell Biology, The University of Iowa, Iowa City, Iowa, USA; Craniofacial Anomalies Research Center, Carver College of Medicine, The University of Iowa, Iowa City, Iowa, USA
| | - Steve Eliason
- Department of Anatomy and Cell Biology, The University of Iowa, Iowa City, Iowa, USA; Craniofacial Anomalies Research Center, Carver College of Medicine, The University of Iowa, Iowa City, Iowa, USA
| | - Zhao Sun
- College of Medicine, Washington University St Louis, St Louis, Missouri, USA
| | - Fan Shao
- Department of Anatomy and Cell Biology, The University of Iowa, Iowa City, Iowa, USA
| | - Brad A Amendt
- Department of Anatomy and Cell Biology, The University of Iowa, Iowa City, Iowa, USA; Craniofacial Anomalies Research Center, Carver College of Medicine, The University of Iowa, Iowa City, Iowa, USA; Iowa Institute for Oral Health Research, College of Dentistry, The University of Iowa, Iowa City, Iowa, USA.
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5
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Popp B, Brugger M, Poschmann S, Bartolomaeus T, Radtke M, Hentschel J, Di Donato N, Rump A, Gburek-Augustat J, Graf E, Wagner M, Sorge I, Lemke JR, Meitinger T, Abou Jamra R, Strehlow V, Brunet T. The constitutional gain-of-function variant p.Glu1099Lys in NSD2 is associated with a novel syndrome. Clin Genet 2023; 103:226-230. [PMID: 36189577 DOI: 10.1111/cge.14241] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2022] [Revised: 09/26/2022] [Accepted: 09/28/2022] [Indexed: 01/07/2023]
Abstract
NSD2 dimethylates histone H3 at lysine 36 (H3K36me2) and is located in the Wolf-Hirschhorn syndrome (WHS) critical region. Recent descriptions have delineated loss-of-function (LoF) variants in NSD2 with a distinct disorder. The oncogenic missense variant p.Glu1099Lys occurs somatically in leukemia and has a gain-of-function (GoF) effect. We describe two individuals carrying p.Glu1099Lys as heterozygous de novo germline variant identified by exome sequencing (ES) of blood DNA and subsequently confirmed in two ectodermal tissues. Clinically, these individuals are characterized by intellectual disability, coarse/ square facial gestalt, abnormalities of the hands, and organomegaly. Public cell lines with NSD2 GoF variants had increased K36me2, DNA promoter methylation, and dysregulated RNA expression. NSD2 GoF caused by p.Glu1099Lys is associated with a novel phenotype different from WHS and Rauch-Steindl syndrome (RAUST).
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Affiliation(s)
- Bernt Popp
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
- Berlin Institute of Health at Charité, Universitätsmedizin Berlin, Center of Functional Genomics, Berlin, Germany
| | - Melanie Brugger
- Institute of Human Genetics, Klinikum rechts der Isar, School of Medicine, Technical University of Munich, Munich, Germany
| | - Sibylle Poschmann
- Division of Neuropediatrics, Clinic for Children and Adolescents Dritter Orden, Munich, Germany
| | - Tobias Bartolomaeus
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
| | - Maximilian Radtke
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
| | - Julia Hentschel
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
| | - Nataliya Di Donato
- Institute for Clinical Genetics, University Hospital, TU Dresden, Dresden, Germany
| | - Andreas Rump
- Institute for Clinical Genetics, University Hospital, TU Dresden, Dresden, Germany
| | - Janina Gburek-Augustat
- Division of Neuropaediatrics, Hospital for Children and Adolescents, University of Leipzig Medical Center, Leipzig, Germany
| | - Elisabeth Graf
- Institute of Human Genetics, Klinikum rechts der Isar, School of Medicine, Technical University of Munich, Munich, Germany
| | - Matias Wagner
- Institute of Human Genetics, Klinikum rechts der Isar, School of Medicine, Technical University of Munich, Munich, Germany
- Institute of Neurogenomics, Helmholtz Zentrum München, Neuherberg, Germany
- Division of Pediatric Neurology, Developmental Medicine and Social Pediatrics, Department of Pediatrics, Dr. von Hauner Children's Hospital, Munich University Hospital (Ludwig Maximilians University), Munich, Germany
| | - Ina Sorge
- Department of Pediatric Radiology, University of Leipzig, Leipzig, Germany
| | - Johannes R Lemke
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
- Center of Rare Diseases, University of Leipzig Medical Center, Leipzig, Germany
| | - Thomas Meitinger
- Institute of Human Genetics, Klinikum rechts der Isar, School of Medicine, Technical University of Munich, Munich, Germany
| | - Rami Abou Jamra
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
| | - Vincent Strehlow
- Institute of Human Genetics, University of Leipzig Medical Center, Leipzig, Germany
| | - Theresa Brunet
- Institute of Human Genetics, Klinikum rechts der Isar, School of Medicine, Technical University of Munich, Munich, Germany
- Institute of Neurogenomics, Helmholtz Zentrum München, Neuherberg, Germany
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6
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Kaiyrzhanov R, Mohammed SEM, Maroofian R, Husain RA, Catania A, Torraco A, Alahmad A, Dutra-Clarke M, Grønborg S, Sudarsanam A, Vogt J, Arrigoni F, Baptista J, Haider S, Feichtinger RG, Bernardi P, Zulian A, Gusic M, Efthymiou S, Bai R, Bibi F, Horga A, Martinez-Agosto JA, Lam A, Manole A, Rodriguez DP, Durigon R, Pyle A, Albash B, Dionisi-Vici C, Murphy D, Martinelli D, Bugiardini E, Allis K, Lamperti C, Reipert S, Risom L, Laugwitz L, Di Nottia M, McFarland R, Vilarinho L, Hanna M, Prokisch H, Mayr JA, Bertini ES, Ghezzi D, Østergaard E, Wortmann SB, Carrozzo R, Haack TB, Taylor RW, Spinazzola A, Nowikovsky K, Houlden H. Bi-allelic LETM1 variants perturb mitochondrial ion homeostasis leading to a clinical spectrum with predominant nervous system involvement. Am J Hum Genet 2022; 109:1692-1712. [PMID: 36055214 PMCID: PMC9502063 DOI: 10.1016/j.ajhg.2022.07.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2022] [Accepted: 07/01/2022] [Indexed: 11/25/2022] Open
Abstract
Leucine zipper-EF-hand containing transmembrane protein 1 (LETM1) encodes an inner mitochondrial membrane protein with an osmoregulatory function controlling mitochondrial volume and ion homeostasis. The putative association of LETM1 with a human disease was initially suggested in Wolf-Hirschhorn syndrome, a disorder that results from de novo monoallelic deletion of chromosome 4p16.3, a region encompassing LETM1. Utilizing exome sequencing and international gene-matching efforts, we have identified 18 affected individuals from 11 unrelated families harboring ultra-rare bi-allelic missense and loss-of-function LETM1 variants and clinical presentations highly suggestive of mitochondrial disease. These manifested as a spectrum of predominantly infantile-onset (14/18, 78%) and variably progressive neurological, metabolic, and dysmorphic symptoms, plus multiple organ dysfunction associated with neurodegeneration. The common features included respiratory chain complex deficiencies (100%), global developmental delay (94%), optic atrophy (83%), sensorineural hearing loss (78%), and cerebellar ataxia (78%) followed by epilepsy (67%), spasticity (53%), and myopathy (50%). Other features included bilateral cataracts (42%), cardiomyopathy (36%), and diabetes (27%). To better understand the pathogenic mechanism of the identified LETM1 variants, we performed biochemical and morphological studies on mitochondrial K+/H+ exchange activity, proteins, and shape in proband-derived fibroblasts and muscles and in Saccharomyces cerevisiae, which is an important model organism for mitochondrial osmotic regulation. Our results demonstrate that bi-allelic LETM1 variants are associated with defective mitochondrial K+ efflux, swollen mitochondrial matrix structures, and loss of important mitochondrial oxidative phosphorylation protein components, thus highlighting the implication of perturbed mitochondrial osmoregulation caused by LETM1 variants in neurological and mitochondrial pathologies.
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Affiliation(s)
- Rauan Kaiyrzhanov
- Department of Neuromuscular Diseases, University College London, Queen Square, Institute of Neurology, London WC1N 3BG, UK
| | - Sami E M Mohammed
- Department of Biomedical Sciences, Institute of Physiology, Pathophysiology and Biophysics, University of Veterinary Medicine Vienna, Vienna 1210, Austria
| | - Reza Maroofian
- Department of Neuromuscular Diseases, University College London, Queen Square, Institute of Neurology, London WC1N 3BG, UK
| | - Ralf A Husain
- Department of Neuropediatrics, Jena University Hospital, Jena 07747, Germany; Center for Rare Diseases, Jena University Hospital, Jena 07747, Germany
| | - Alessia Catania
- Unit of Medical Genetics and Neurogenetics, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan 20126, Italy
| | - Alessandra Torraco
- Unit of Muscular and Neurodegenerative Disorders, Laboratory of Molecular Medicine, Bambino Gesù Children's Hospital, IRCCS, Rome 00146, Italy
| | - Ahmad Alahmad
- Wellcome Centre for Mitochondrial Research, Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne NE2 4HH, UK; Kuwait Medical Genetics Centre, Al-Sabah Medical Area 80901, Kuwait
| | - Marina Dutra-Clarke
- Division of Medical Genetics, Department of Pediatrics, David Geffen School of Medicine, the University of California at Los Angeles, Los Angeles, CA 90095, USA
| | - Sabine Grønborg
- Center for Rare Diseases, Department of Pediatrics and Department of Genetics, Copenhagen University Hospital Rigshospitalet, Blegdamsvej 9, Copenhagen 2100, Denmark
| | - Annapurna Sudarsanam
- West Midlands Regional Genetics Service, Birmingham Women's and Children's Hospital, Birmingham B15 2TG, UK
| | - Julie Vogt
- West Midlands Regional Genetics Service, Birmingham Women's and Children's Hospital, Birmingham B15 2TG, UK
| | - Filippo Arrigoni
- Paediatric Radiology and Neuroradiology Department, V. Buzzi Children's Hospital, Milan 20154, Italy
| | - Julia Baptista
- Peninsula Medical School, Faculty of Health, University of Plymouth, Plymouth PL4 8AA, UK
| | - Shahzad Haider
- Paediatrics Wah Medical College NUMS, Wah Cantonment, Punjab 44000, Pakistan
| | - René G Feichtinger
- University Children's Hospital, Salzburger Landeskliniken (SALK) and Paracelsus Medical University (PMU), Salzburg 5020, Austria
| | - Paolo Bernardi
- Department of Biomedical Sciences, University of Padova, Via Ugo Bassi 58/B, Padova 35131, Italy
| | - Alessandra Zulian
- Department of Biomedical Sciences, University of Padova, Via Ugo Bassi 58/B, Padova 35131, Italy
| | - Mirjana Gusic
- Institute of Neurogenomics, Helmholtz Zentrum München, Neuherberg 85764, Germany; DZHK (German Centre for Cardiovascular Research), Partner Site Munich Heart Alliance, Munich 81675, Germany; Institute of Human Genetics, Technical University of Munich, Munich 81675, Germany
| | - Stephanie Efthymiou
- Department of Neuromuscular Diseases, University College London, Queen Square, Institute of Neurology, London WC1N 3BG, UK
| | | | - Farah Bibi
- Institute of Biochemistry and Biotechnology, Pir Mehar Ali Shah Arid Agriculture University, Rawalpindi 44000, Pakistan
| | - Alejandro Horga
- Department of Neuromuscular Diseases, University College London, Queen Square, Institute of Neurology, London WC1N 3BG, UK; Neuromuscular Diseases Unit, Department of Neurology, Hospital Clinico San Carlos and San Carlos Health Research Institute (IdISSC), Madrid 28040, Spain
| | - Julian A Martinez-Agosto
- Department of Human Genetics, Division of Medical Genetics, Department of Pediatrics, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles, CA 90095, USA
| | - Amanda Lam
- Neurometabolic Unit, National Hospital for Neurology and Neurosurgery, London, UK; Department of Chemical Pathology, Great Ormond Street Hospital, WC1N 3BG London, UK
| | - Andreea Manole
- Department of Neuromuscular Diseases, University College London, Queen Square, Institute of Neurology, London WC1N 3BG, UK
| | - Diego-Perez Rodriguez
- Department of Clinical Movement Neurosciences, Royal Free Campus, University College of London, Queen Square Institute of Neurology, London WC1N 3BG, UK
| | - Romina Durigon
- Department of Clinical Movement Neurosciences, Royal Free Campus, University College of London, Queen Square Institute of Neurology, London WC1N 3BG, UK
| | - Angela Pyle
- Wellcome Centre for Mitochondrial Research, Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne NE2 4HH, UK
| | - Buthaina Albash
- Kuwait Medical Genetics Centre, Al-Sabah Medical Area 80901, Kuwait
| | - Carlo Dionisi-Vici
- Division of Metabolism, Bambino Gesù Children's Hospital, IRCCS, Rome 00146, Italy
| | - David Murphy
- Department of Clinical and Movement Neurosciences, UCL Queen Square Institute of Neurology, University College London, London WC1N 3BG, UK
| | - Diego Martinelli
- Division of Metabolism, Bambino Gesù Children's Hospital, IRCCS, Rome 00146, Italy
| | - Enrico Bugiardini
- Department of Neuromuscular Diseases, University College London, Queen Square, Institute of Neurology, London WC1N 3BG, UK
| | | | - Costanza Lamperti
- Unit of Medical Genetics and Neurogenetics, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan 20126, Italy
| | - Siegfried Reipert
- Core Facility of Cell Imaging and Ultrastructure Research, University of Vienna, Djerassiplatz 1, 1030 Wien, Austria
| | - Lotte Risom
- Department of Genetics, Copenhagen University Hospital Rigshospitalet Blegdamsvej, Copenhagen 2100, Denmark
| | - Lucia Laugwitz
- Institute of Medical Genetics and Applied Genomics, University of Tuebingen, 72076 Tübingen, Germany; Department of Neuropediatrics, Developmental Neurology and Social Pediatrics, University of Tübingen, Tübingen 72076, Germany
| | - Michela Di Nottia
- Unit of Muscular and Neurodegenerative Disorders, Laboratory of Molecular Medicine, Bambino Gesù Children's Hospital, IRCCS, Rome 00146, Italy
| | - Robert McFarland
- Wellcome Centre for Mitochondrial Research, Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne NE2 4HH, UK; NHS Highly Specialised Service for Rare Mitochondrial Disorders, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne NE1 4LP, UK
| | - Laura Vilarinho
- Unit of Neonatal Screening, Metabolism and Genetics, Department of Human Genetics, National Institute of Health Dr Ricardo Jorge, Porto 4000-055, Portugal
| | - Michael Hanna
- Department of Neuromuscular Diseases, University College London, Queen Square, Institute of Neurology, London WC1N 3BG, UK
| | - Holger Prokisch
- Institute of Neurogenomics, Helmholtz Zentrum München, Neuherberg 85764, Germany; Institute of Human Genetics, Technical University of Munich, Munich 81675, Germany
| | - Johannes A Mayr
- University Children's Hospital, Salzburger Landeskliniken (SALK) and Paracelsus Medical University (PMU), Salzburg 5020, Austria
| | - Enrico Silvio Bertini
- Unit of Muscular and Neurodegenerative Disorders, Laboratory of Molecular Medicine, Bambino Gesù Children's Hospital, IRCCS, Rome 00146, Italy
| | - Daniele Ghezzi
- Unit of Medical Genetics and Neurogenetics, Fondazione IRCCS Istituto Neurologico Carlo Besta, Milan 20126, Italy; Department of Pathophysiology and Transplantation, University of Milan, Milan 20122, Italy
| | - Elsebet Østergaard
- Department of Genetics, Copenhagen University Hospital Rigshospitalet Blegdamsvej, Copenhagen 2100, Denmark; Institute for Clinical Medicine, University of Copenhagen, Copenhagen 2200, Denmark
| | - Saskia B Wortmann
- University Children's Hospital, Salzburger Landeskliniken (SALK) and Paracelsus Medical University (PMU), Salzburg 5020, Austria; Institute of Neurogenomics, Helmholtz Zentrum München, Neuherberg 85764, Germany; Institute of Human Genetics, Technical University of Munich, Munich 81675, Germany; Radboud Center for Mitochondrial Medicine, Department of Pediatrics, Amalia Children's Hospital, Radboudumc, Nijmegen 6525 EZ, the Netherlands
| | - Rosalba Carrozzo
- Unit of Muscular and Neurodegenerative Disorders, Laboratory of Molecular Medicine, Bambino Gesù Children's Hospital, IRCCS, Rome 00146, Italy
| | - Tobias B Haack
- Department of Neuropediatrics, Developmental Neurology and Social Pediatrics, University of Tübingen, Tübingen 72076, Germany; Centre for Rare Diseases, University of Tuebingen, Tübingen 72076, Germany
| | - Robert W Taylor
- Wellcome Centre for Mitochondrial Research, Translational and Clinical Research Institute, Faculty of Medical Sciences, Newcastle University, Newcastle Upon Tyne NE2 4HH, UK; NHS Highly Specialised Service for Rare Mitochondrial Disorders, Newcastle upon Tyne Hospitals NHS Foundation Trust, Newcastle upon Tyne NE1 4LP, UK
| | - Antonella Spinazzola
- Department of Clinical Movement Neurosciences, Royal Free Campus, University College of London, Queen Square Institute of Neurology, London WC1N 3BG, UK
| | - Karin Nowikovsky
- Department of Biomedical Sciences, Institute of Physiology, Pathophysiology and Biophysics, University of Veterinary Medicine Vienna, Vienna 1210, Austria; Department of Internal Medicine I, ASCTR and Comprehensive Cancer Center, Medical University of Vienna, Vienna 1090, Austria.
| | - Henry Houlden
- Department of Neuromuscular Diseases, University College London, Queen Square, Institute of Neurology, London WC1N 3BG, UK.
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7
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Blanco Lago R, da Silva Mori X, Cristina BF, Málaga Diéguez I, Mori Álvarez MDLÁ, Graña Barreiro N, Lapunzina Badía P, Nevado Blanco J. [Prevalence and geographic distribution of the Wolf-Hirschhorn syndrome in Spain.]. Rev Esp Salud Publica 2022; 96:e202206045. [PMID: 35703131] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2022] [Accepted: 04/22/2022] [Indexed: 06/15/2023] Open
Abstract
OBJECTIVE Wolf-Hirschhorn syndrome is a rare disease of genetic origin caused by the deletion of the distal end of chromosome 4, including at least the region p16.3. The objectives of this work were to determine the prevalence of the disease in the Spanish population, as well as to establish the geographical distribution of the syndrome throughout the Spanish geography, elucidating the age range in which there are more patients. METHODS Patients diagnosed with the disease for nine years (2013-2021) throughout the Spanish territory were recruited for the research, thanks to agreements with the Spanish Association of Wolf-Hirschhorn Syndrome (AESWH). The clinical information of the patients was obtained from referring physicians using two standardized questionnaires completed with data from medical reports and the parent interview. The molecular characterization of the disease was made using SNP (single nucleotide polymorphism) microarrays (cytoSNP850K, Illumina, USA). The data were statistically processed using Microsoft Excel (Microsoft Corporation) and SPSS (IBM) software, using comparisons between two groups s with Student's t-test (for continuous variables) or with Chi-square tests (for categorical ones). For more than two groups, ANOVA analyses were performed (followed by Bonferroni or T3-Dunnett post hoc tests) for continuous variables and z-tests between column proportions for categorical variables. RESULTS In Spain (until 2021) eighty people are diagnosed with this syndrome, estimating its prevalence at 1.69x10-4 per 10,000 inhabitants and / or 1/172,904 for each live newborn. This paper remarks the existence of important differences in prevalence between the different regions in Spain. The region with the most diagnosed patients was Madrid, although the highest prevalence was observed in Asturias. Significant differences have been established in terms of sex and disease (ratio of women to men of 2:1), and the mean age at diagnosis has been established at 7.20 years. CONCLUSIONS The prevalence of this syndrome in Spain has been estimated well below the prevalence that is handled in scientific texts (1/50,000 newborns). In addition, we have determined that this prevalence shows large geographical differences, which allows us to affirm that this syndrome could be under-diagnosed in our country. Most of the patients included in this cohort are of paediatric age. It has not been possible to corroborate that mortality in this syndrome, in our population, occurs preferably during the first two years of life, as has been claimed.
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Affiliation(s)
| | - Xana da Silva Mori
- Departamento de Investigación y Psicología en Educación, Facultad de Educación, Universidad Complutense de Madrid. Madrid. España
| | - Bel Fenellós Cristina
- Instituto de Genética Médica y Molecular (INGEMM)-IdiPAZ (Instituto de Investigación del Hospital Universitario La Paz). Madrid. España
| | | | - Mª de Los Ángeles Mori Álvarez
- Departamento de Investigación y Psicología en Educación, Facultad de Educación, Universidad Complutense de Madrid. Madrid. España
- Centro de Investigación Básica en Red de Enfermedades Raras (CIBERER). Instituto de Salud Carlos III. Madrid. España
- ITHACA-European Reference Network. Hospital la Paz. Madrid. España
| | - Natalia Graña Barreiro
- Responsable del Área Médica y Directora del Comité Científico, Asociación Española de Síndrome Wolf-Hirschhorn. Madrid. España
| | - Pablo Lapunzina Badía
- Departamento de Investigación y Psicología en Educación, Facultad de Educación, Universidad Complutense de Madrid. Madrid. España
- Centro de Investigación Básica en Red de Enfermedades Raras (CIBERER). Instituto de Salud Carlos III. Madrid. España
- ITHACA-European Reference Network. Hospital la Paz. Madrid. España
| | - Julián Nevado Blanco
- Departamento de Investigación y Psicología en Educación, Facultad de Educación, Universidad Complutense de Madrid. Madrid. España
- Centro de Investigación Básica en Red de Enfermedades Raras (CIBERER). Instituto de Salud Carlos III. Madrid. España
- ITHACA-European Reference Network. Hospital la Paz. Madrid. España
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8
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Wiel LC, Bruno I, Barbi E, Sirchia F. From Wolf-Hirschhorn syndrome to NSD2 haploinsufficiency: a shifting paradigm through the description of a new case and a review of the literature. Ital J Pediatr 2022; 48:72. [PMID: 35550183 PMCID: PMC9097050 DOI: 10.1186/s13052-022-01267-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/18/2021] [Accepted: 03/29/2022] [Indexed: 11/23/2022] Open
Abstract
Background Wolf-Hirschhorn syndrome (WHS) is a well-defined disorder, whose core phenotype encompasses growth restriction, facial gestalt, intellectual disability and seizures. Nevertheless, great phenotypic variability exists due to the variable extent of the responsible 4p deletion. In addition, exome sequencing analyses, recently identified two genes, namely NSD2 and NELFA, whose loss-of-function variants contribute to a clinical spectrum consistent with atypical or partial WHS. The observation of patients exhibiting clinical features resembling WHS, with only mild developmental delay and without the typical dysmorphic features, carrying microdeletions sparing NSD2, has lead to the hypothesis that NSD2 is responsible for the intellectual disability and the facial gestalt of WHS. While presenting some of the typical findings of WHS (intellectual disability, facial gestalt, microcephaly, growth restriction and congenital heart defects), NSD2-deleted children tend to display a milder spectrum of skeletal abnormalities, usually consisting of clinodactyly, and do not exhibit seizures. We describe the clinical picture of a child with WHS due to a de novo mutation of NSD2 and discuss the clinical and diagnostic implications. Case presentation A 6-year-old boy was evaluated for a history of intrauterine growth restriction, low birth weight, neonatal hypotonia, and psychomotor delay. No episodes of seizure were reported. At physical examination, he displayed marphanoid habitus, muscle hypotrophy and facial dysmorphisms consisting in high frontal hairline, upslanting palpebral fissures and full lips with bifid ugula. Cryptorchidism, shawl scrotum, mild clinodactyly of the right little finger and bilateral syndactyly of the II and III toes with sandal gap were also noted. The radiographic essay demonstrated delayed bone age and echocardiography showed mild mitral prolapse. Whole genome sequencing analysis revealed a heterozygous de novo variant of NSD2 (c.2523delG). Conclusions Full WHS phenotype likely arises from the cumulative effect of the combined haploinsufficiency of several causative genes mapping within the 4p16.3 region, as a contiguous genes syndrome, with slightly different phenotypes depending on the specific genes involved in the deletion. When evaluating children with pictures resembling WHS, in absence of seizures, clinicians should consider this differential diagnosis.
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Affiliation(s)
| | - Irene Bruno
- Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - Egidio Barbi
- University of Trieste, Piazzale Europa, 1, 34127, Trieste, Italy.,Institute for Maternal and Child Health - IRCCS Burlo Garofolo, Trieste, Italy
| | - Fabio Sirchia
- Department of Molecular Medicine, University of Pavia, Pavia, Italy.,IRCCS Mondino Foundation, Pavia, Italy
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9
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Serrano Martín C, Fernández Feijoo J, García Mato E, Varela Aneiros I, Diniz Freitas M, Vázquez García E, Limeres Posse J. "A practical approach to dental care for patients with Wolf-Hirschhorn syndrome". Spec Care Dentist 2021; 42:137-142. [PMID: 34538003 DOI: 10.1111/scd.12644] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2021] [Revised: 08/13/2021] [Accepted: 08/15/2021] [Indexed: 11/27/2022]
Abstract
Wolf-Hirschhorn syndrome is a polymalformative chromosomal disorder caused by a deletion in the distal region of the short arm of chromosome 4. The disease is considered rare (1/50,000 births) and predominantly affects females (2:1). In addition to the characteristic facial phenotype ("Greek warrior helmet"), its clinical manifestations include epilepsy, developmental and psychomotor delay, intellectual disability, cardiac and respiratory complications, and eating problems. The most prevalent oral manifestations are hypodontia, delayed tooth eruption, morphological dental abnormalities, dental malocclusions, cleft lip/palate and ogival palate. Based on our clinical experience, Wolf-Hirschhorn syndrome does not represent an absolute contraindication for any type of dental procedure. The feasibility of dental treatment will depend mainly on the degree of epilepsy control and on the level of collaboration, this latter conditioned by the severity of the intellectual disability and communication difficulties.
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Affiliation(s)
- Candela Serrano Martín
- Medical-Surgical Dentistry Research Group (OMEQUI), Health Research Institute of Santiago de Compostela (IDIS), University of Santiago de Compostela (USC), Santiago de Compostela, Spain
| | - Javier Fernández Feijoo
- Medical-Surgical Dentistry Research Group (OMEQUI), Health Research Institute of Santiago de Compostela (IDIS), University of Santiago de Compostela (USC), Santiago de Compostela, Spain
| | - Eliane García Mato
- Medical-Surgical Dentistry Research Group (OMEQUI), Health Research Institute of Santiago de Compostela (IDIS), University of Santiago de Compostela (USC), Santiago de Compostela, Spain
| | - Iván Varela Aneiros
- Medical-Surgical Dentistry Research Group (OMEQUI), Health Research Institute of Santiago de Compostela (IDIS), University of Santiago de Compostela (USC), Santiago de Compostela, Spain
| | - Marcio Diniz Freitas
- Medical-Surgical Dentistry Research Group (OMEQUI), Health Research Institute of Santiago de Compostela (IDIS), University of Santiago de Compostela (USC), Santiago de Compostela, Spain
| | | | - Jacobo Limeres Posse
- Medical-Surgical Dentistry Research Group (OMEQUI), Health Research Institute of Santiago de Compostela (IDIS), University of Santiago de Compostela (USC), Santiago de Compostela, Spain
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10
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Battaglia A, Carey JC. The delineation of the Wolf-Hirschhorn syndrome over six decades: Illustration of the ongoing advances in phenotype analysis and cytogenomic technology. Am J Med Genet A 2021; 185:2748-2755. [PMID: 34002939 DOI: 10.1002/ajmg.a.62341] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 03/24/2021] [Accepted: 05/03/2021] [Indexed: 11/10/2022]
Abstract
Since Hirschhorn's description in 1961, the history and chronology of the clinical, cytogenetic, and molecular characterization of Wolf-Hirschhorn syndrome (WHS) elegantly demonstrates the remarkable advances in genetic technology over the last six decades that have paralleled the delineation of the phenotype. After mention in the Human Chromosome Newsletter of a child with a visible deletion of the top of a B chromosome group, 4-5, Hirschhorn and colleagues companioned their report with that of Wolf et al. in Humangenetik in 1965, and the condition was recognized and named. The 1960-1970s witnessed the description of many of the now classic chromosome disorders, including WHS, while HRB allowed for the recognition of chromosome syndromes with smaller deletions/duplications. FISH probes, developed in the next two decades, enabled the characterization of the critical region of WHS and improved clinical diagnosis with subtelomeric probes. Cytogenomic microarray in the early-mid 2000s led to both improved diagnosis of WHS patients and documentation of microdeletions of <5 megabases, helping to characterize the critical regions for specific component phenotypes (e.g., seizures, face). Recently exome sequencing technology has led to the discovery of WHS patients with WHSC1 loss of function variants, displaying some cardinal features of the phenotype (face, growth, and developmental delay).
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Affiliation(s)
- Agatino Battaglia
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Pisa, Italy
| | - John C Carey
- Department of Pediatrics, Division of Medical Genetics, University of Utah, Utah, USA
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11
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Natarajan GK, Mishra J, Camara AKS, Kwok WM. LETM1: A Single Entity With Diverse Impact on Mitochondrial Metabolism and Cellular Signaling. Front Physiol 2021; 12:637852. [PMID: 33815143 PMCID: PMC8012663 DOI: 10.3389/fphys.2021.637852] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2020] [Accepted: 02/25/2021] [Indexed: 12/11/2022] Open
Abstract
Nearly 2 decades since its discovery as one of the genes responsible for the Wolf-Hirschhorn Syndrome (WHS), the primary function of the leucine-zipper EF-hand containing transmembrane 1 (LETM1) protein in the inner mitochondrial membrane (IMM) or the mechanism by which it regulates mitochondrial Ca2+ handling is unresolved. Meanwhile, LETM1 has been associated with the regulation of fundamental cellular processes, such as development, cellular respiration and metabolism, and apoptosis. This mini-review summarizes the diversity of cellular functions impacted by LETM1 and highlights the multiple roles of LETM1 in health and disease.
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Affiliation(s)
- Gayathri K Natarajan
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Jyotsna Mishra
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Amadou K S Camara
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, WI, United States.,Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, United States.,Cancer Center, Medical College of Wisconsin, Milwaukee, WI, United States.,Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Wai-Meng Kwok
- Department of Anesthesiology, Medical College of Wisconsin, Milwaukee, WI, United States.,Cancer Center, Medical College of Wisconsin, Milwaukee, WI, United States.,Cardiovascular Center, Medical College of Wisconsin, Milwaukee, WI, United States.,Department of Pharmacology and Toxicology, Medical College of Wisconsin, Milwaukee, WI, United States
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12
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Lin QT, Lee R, Feng AL, Kim MS, Stathopulos PB. The leucine zipper EF-hand containing transmembrane protein-1 EF-hand is a tripartite calcium, temperature, and pH sensor. Protein Sci 2021; 30:855-872. [PMID: 33576522 DOI: 10.1002/pro.4042] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 02/09/2021] [Accepted: 02/09/2021] [Indexed: 12/15/2022]
Abstract
Leucine Zipper EF-hand containing transmembrane protein-1 (LETM1) is an inner mitochondrial membrane protein that mediates mitochondrial calcium (Ca2+ )/proton exchange. The matrix residing carboxyl (C)-terminal domain contains a sequence identifiable EF-hand motif (EF1) that is highly conserved among orthologues. Deletion of EF1 abrogates LETM1 mediated mitochondrial Ca2+ flux, highlighting the requirement of EF1 for LETM1 function. To understand the mechanistic role of this EF-hand in LETM1 function, we characterized the biophysical properties of EF1 in isolation. Our data show that EF1 exhibits α-helical secondary structure that is augmented in the presence of Ca2+ . Unexpectedly, EF1 features a weak (~mM), but specific, apparent Ca2+ -binding affinity, consistent with the canonical Ca2+ coordination geometry, suggested by our solution NMR. The low affinity is, at least in part, due to an Asp at position 12 of the binding loop, where mutation to Glu increases the affinity by ~4-fold. Further, the binding affinity is sensitive to pH changes within the physiological range experienced by mitochondria. Remarkably, EF1 unfolds at high and low temperatures. Despite these unique EF-hand properties, Ca2+ binding increases the exposure of hydrophobic regions, typical of EF-hands; however, this Ca2+ -induced conformational change shifts EF1 from a monomer to higher order oligomers. Finally, we showed that a second, putative EF-hand within LETM1 is unreactive to Ca2+ either in isolation or tandem with EF1. Collectively, our data reveal that EF1 is structurally and biophysically responsive to pH, Ca2+ and temperature, suggesting a role as a multipartite environmental sensor within LETM1.
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Affiliation(s)
- Qi-Tong Lin
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
| | - Rachel Lee
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada.,Temerty Faculty of Medicine, University of Toronto, Toronto, Canada
| | - Allen L Feng
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada.,Faculty of Dentistry, University of Toronto, Toronto, Canada
| | - Michael S Kim
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada.,Department of Radiation Oncology, Dalhousie University, Halifax, Canada
| | - Peter B Stathopulos
- Department of Physiology and Pharmacology, Schulich School of Medicine and Dentistry, University of Western Ontario, London, Ontario, Canada
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13
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Carey JC. Parent-authored memoirs: Lessons in the practice of narrative medicine. Am J Med Genet A 2021; 185:2846-2848. [PMID: 33599369 DOI: 10.1002/ajmg.a.62107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 01/21/2021] [Indexed: 11/05/2022]
Abstract
Healthcare professionals, including practitioners of medical genetics and genetic counseling, have much to learn about the experiences of parents who are raising and caring for a child with a rare disease or developmental disability. Knowledge and understanding of the challenges in the care of a child with conditions such as Down syndrome and Wolf-Hirschhorn syndrome are at the core of the practice of genetic medicine. Insights into this experience can come from active listening to stories and from deep reading of memoirs and narratives authored by parents of children having these challenges. A recent book, Raising a rare girl: A memoir, by writer, poet, and teacher, Heather Lanier, represents a relevant and prototypic example of this genre. Spending the effort in the contemplation of the parental stories provides a valuable lesson in narrative medicine and the experience of empathy for the plight of the family.
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Affiliation(s)
- John C Carey
- Division of Medical Genetics, Department of Pediatrics, University of Utah Health, Salt Lake City, Utah, USA
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14
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Gofin Y, Mackay LP, Machol K, Keswani S, Potocki L, Di Gregorio E, Naretto VG, Brusco A, Hernandez-Garcia A, Scott DA. Evidence that FGFRL1 contributes to congenital diaphragmatic hernia development in humans. Am J Med Genet A 2021; 185:836-840. [PMID: 33443296 DOI: 10.1002/ajmg.a.62066] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Revised: 12/18/2020] [Accepted: 12/19/2020] [Indexed: 11/10/2022]
Abstract
Fibroblast growth factor receptor-like 1 (FGFRL1) encodes a transmembrane protein that is related to fibroblast growth factor receptors but lacks an intercellular tyrosine kinase domain. in vitro studies suggest that FGFRL1 inhibits cell proliferation and promotes cell differentiation and cell adhesion. Mice that lack FGFRL1 die shortly after birth from respiratory distress and have abnormally thin diaphragms whose muscular hypoplasia allows the liver to protrude into the thoracic cavity. Haploinsufficiency of FGFRL1 has been hypothesized to contribute to the development of congenital diaphragmatic hernia (CDH) associated with Wolf-Hirschhorn syndrome. However, data from both humans and mice suggest that disruption of one copy of FGFRL1 alone is insufficient to cause diaphragm defects. Here we report a female fetus with CDH whose 4p16.3 deletion allows us to refine the Wolf-Hirschhorn syndrome CDH critical region to an approximately 1.9 Mb region that contains FGFRL1. We also report a male infant with isolated left-sided diaphragm agenesis who carried compound heterozygous missense variants in FGFRL1. These cases provide additional evidence that deleterious FGFRL1 variants may contribute to the development of CDH in humans.
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Affiliation(s)
- Yoel Gofin
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA.,Texas Children's Hospital, Houston, Texas, USA
| | - Laura Palmer Mackay
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA.,Texas Children's Hospital, Houston, Texas, USA
| | - Keren Machol
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA.,Texas Children's Hospital, Houston, Texas, USA
| | - Sundeep Keswani
- Texas Children's Hospital, Houston, Texas, USA.,Department of Surgery, Baylor College of Medicine, Houston, Texas, USA
| | - Lorraine Potocki
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA.,Texas Children's Hospital, Houston, Texas, USA
| | - Eleonora Di Gregorio
- Medical Genetics Unit, Città della Salute e della Scienza University Hospital, Torino, Italy
| | - Valeria Giorgia Naretto
- Medical Genetics Unit, Città della Salute e della Scienza University Hospital, Torino, Italy
| | - Alfredo Brusco
- Medical Genetics Unit, Città della Salute e della Scienza University Hospital, Torino, Italy.,Department of Medical Sciences, University of Turin, Torino, Italy
| | | | - Daryl A Scott
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas, USA.,Texas Children's Hospital, Houston, Texas, USA.,Department of Molecular Physiology and Biophysics, Baylor College of Medicine, Houston, Texas, USA
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15
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Hu X, Wu D, Li Y, Wei L, Li X, Qin M, Li H, Li M, Chen S, Gong C, Shen Y. The first familial NSD2 cases with a novel variant in a Chinese father and daughter with atypical WHS facial features and a 7.5-year follow-up of growth hormone therapy. BMC Med Genomics 2020; 13:181. [PMID: 33276791 PMCID: PMC7716467 DOI: 10.1186/s12920-020-00831-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Accepted: 11/23/2020] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Wolf-Hirschhorn syndrome is a well-characterized genomic disorder caused by 4p16.3 deletions. Wolf-Hirschhorn syndrome patients exhibit characteristic facial dysmorphism, growth retardation, developmental delay, intellectual disability and seizure disorders. Recently, NSD2 gene located within the 165 kb Wolf-Hirschhorn syndrome critical region was identified as the key causal gene responsible for most if not all phenotypes of Wolf-Hirschhorn syndrome. So far, eight NSD2 loss of function variants have been reported in patients from different parts of the world, all were de novo variants. METHODS In our study, we performed whole exome sequencing for two patients from one family. We also reviewed more NSD2 mutation cases in pervious literature. RESULTS A novel loss of function NSD2 variant, c.1577dupG (p.Asn527Lysfs*14), was identified in a Chinese family in the proband and her father both affected with intellectual disability. After reviewing more NSD2 mutation cases in pervious literature, we found none of them had facial features that can be recognized as Wolf-Hirschhorn syndrome. In addition, we have given our proband growth hormone and followed up with this family for 7.5 years. CONCLUSIONS Here we reported the first familial NSD2 variant and the long-term effect of growth hormone therapy for patients. Our results suggested NSD2 mutation might cause a distinct intellectual disability and short stature syndrome.
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Affiliation(s)
- Xuyun Hu
- Beijing Key Laboratory for Genetics of Birth Defects, Beijing Pediatric Research Institute; MOE Key Laboratory of Major Diseases in Children, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100045, China.,Genetics and Birth Defects Control Center, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100045, China
| | - Di Wu
- Department of Endocrinology, Genetics and Metabolism, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, No.56 South Lishi Road, Xicheng District, Beijing, 100045, PR China
| | - Yuchuan Li
- Department of Endocrinology, Genetics and Metabolism, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, No.56 South Lishi Road, Xicheng District, Beijing, 100045, PR China
| | - Liya Wei
- Department of Endocrinology, Genetics and Metabolism, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, No.56 South Lishi Road, Xicheng District, Beijing, 100045, PR China
| | - Xiaoqiao Li
- Department of Endocrinology, Genetics and Metabolism, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, No.56 South Lishi Road, Xicheng District, Beijing, 100045, PR China
| | - Miao Qin
- Department of Endocrinology, Genetics and Metabolism, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, No.56 South Lishi Road, Xicheng District, Beijing, 100045, PR China
| | - Hongdou Li
- Obstetrics Gynecology Hospital, The Institute of Reproduction and Developmental Biology, Fudan University, Shanghai, 200011, China
| | - Mengting Li
- Genetic and Metabolic Central Laboratory, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, 530023, Guangxi, China
| | - Shaoke Chen
- The second affiliated hospital of Guangxi Medical University, Nanning, 530000, Guangxi, China
| | - Chunxiu Gong
- Beijing Key Laboratory for Genetics of Birth Defects, Beijing Pediatric Research Institute; MOE Key Laboratory of Major Diseases in Children, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, Beijing, 100045, China. .,Department of Endocrinology, Genetics and Metabolism, Beijing Children's Hospital, Capital Medical University, National Center for Children's Health, No.56 South Lishi Road, Xicheng District, Beijing, 100045, PR China.
| | - Yiping Shen
- Genetic and Metabolic Central Laboratory, Maternal and Child Health Hospital of Guangxi Zhuang Autonomous Region, Nanning, 530023, Guangxi, China. .,Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, Shanghai, 200011, China. .,Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, 300 Longwood Ave, Boston, MA, 02115, USA.
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16
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Mekkawy MK, Kamel AK, Thomas MM, Ashaat EA, Zaki MS, Eid OM, Ismail S, Hammad SA, Megahed H, ElAwady H, Refaat KM, Hussien S, Helmy N, Abd Allah SG, Mohamed AM, El Ruby MO. Clinical and genetic characterization of ten Egyptian patients with Wolf-Hirschhorn syndrome and review of literature. Mol Genet Genomic Med 2020; 9:e1546. [PMID: 33217222 PMCID: PMC8077161 DOI: 10.1002/mgg3.1546] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2020] [Revised: 09/26/2020] [Accepted: 10/12/2020] [Indexed: 12/25/2022] Open
Abstract
Background Wolf–Hirschhorn syndrome (WHS) (OMIM 194190) is a multiple congenital anomalies/intellectual disability syndrome. It is caused by partial loss of genetic material from the distal portion of the short arm of chromosome. Methods We studied the phenotype–genotype correlation. Results We present the clinical manifestations and cytogenetic results of 10 unrelated Egyptian patients with 4p deletions. Karyotyping, FISH and MLPA was performed for screening for microdeletion syndromes. Array CGH was done for two patients. All patients exhibited the cardinal clinical manifestation of WHS. FISH proved deletion of the specific WHS locus in all patients. MLPA detected microdeletion of the specific locus in two patients with normal karyotypes, while array CGH, performed for two patients, has delineated the extent of the deleted segments and the involved genes. LETM1, the main candidate gene for the seizure phenotype, was found deleted in the two patients tested by array CGH; nevertheless, one of them did not manifest seizures. The study emphasized the previous. Conclusion WHS is a contiguous gene syndrome resulting from hemizygosity of the terminal 2 Mb of 4p16.3 region. The Branchial fistula, detected in one of our patients is a new finding that, to our knowledge, was not reported.
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Affiliation(s)
- Mona K Mekkawy
- Human Cytogenetics Department, National Research Centre, Cairo, Egypt
| | - Alaa K Kamel
- Human Cytogenetics Department, National Research Centre, Cairo, Egypt
| | - Manal M Thomas
- Clinical Genetics Department, National Research Centre, Cairo, Egypt
| | - Engy A Ashaat
- Clinical Genetics Department, National Research Centre, Cairo, Egypt
| | - Maha S Zaki
- Clinical Genetics Department, National Research Centre, Cairo, Egypt
| | - Ola M Eid
- Human Cytogenetics Department, National Research Centre, Cairo, Egypt
| | - Samira Ismail
- Clinical Genetics Department, National Research Centre, Cairo, Egypt
| | - Saida A Hammad
- Clinical Genetics Department, National Research Centre, Cairo, Egypt
| | - Hisham Megahed
- Clinical Genetics Department, National Research Centre, Cairo, Egypt
| | - Heba ElAwady
- Pediatric Department, Faculty of Medicine, Fayoum unIversity, Fayoum, Egypt
| | - Khaled M Refaat
- Human Cytogenetics Department, National Research Centre, Cairo, Egypt
| | - Shymaa Hussien
- Human Cytogenetics Department, National Research Centre, Cairo, Egypt
| | - Nivine Helmy
- Human Cytogenetics Department, National Research Centre, Cairo, Egypt
| | - Sally G Abd Allah
- Human Cytogenetics Department, National Research Centre, Cairo, Egypt
| | - Amal M Mohamed
- Human Cytogenetics Department, National Research Centre, Cairo, Egypt
| | - Mona O El Ruby
- Clinical Genetics Department, National Research Centre, Cairo, Egypt
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17
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Limeres J, Serrano C, De Nova JM, Silvestre-Rangil J, Machuca G, Maura I, Cruz Ruiz-Villandiego J, Diz P, Blanco-Lago R, Nevado J, Diniz-Freitas M. Oral Manifestations of Wolf-Hirschhorn Syndrome: Genotype-Phenotype Correlation Analysis. J Clin Med 2020; 9:jcm9113556. [PMID: 33158290 PMCID: PMC7694380 DOI: 10.3390/jcm9113556] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2020] [Revised: 10/30/2020] [Accepted: 10/31/2020] [Indexed: 02/07/2023] Open
Abstract
Background: Wolf-Hirschhorn syndrome (WHS) is a rare disease caused by deletion in the distal moiety of the short arm of chromosome 4. The objectives of this study were to report the most representative oral findings of WHS, relate them with other clinical characteristics of the disease, and establish possible phenotype-genotype correlation. Methods: The study was conducted at 6 reference centers distributed throughout Spain during 2018–2019. The study group consisted of 31 patients with WHS who underwent a standardized oral examination. Due to behavioral reasons, imaging studies were performed on only 11 of the children 6 years of age or older. All participants had previously undergone a specific medical examination for WHS, during which anatomical, functional, epilepsy-related, and genetic variables were recorded. Results: The most prevalent oral manifestations were delayed tooth eruption (74.1%), bruxism (64.5%), dental agenesis (63.6%), micrognathia (60.0%), oligodontia (45.5%), and downturned corners of the mouth (32.3%). We detected strong correlation between psychomotor delay and oligodontia (p = 0.008; Cramér’s V coefficient, 0.75). The size of the deletion was correlated in a statistically significant manner with the presence of oligodontia (p = 0.009; point-biserial correlation coefficient, 0.75). Conclusion: Certain oral manifestations prevalent in WHS can form part of the syndrome’s phenotypic variability. A number of the characteristics of WHS, such as psychomotor delay and epilepsy, are correlated with oral findings such as oligodontia and bruxism. Although most genotype-phenotype correlations are currently unknown, most of them seem to be associated with larger deletions, suggesting that some oral-facial candidate genes might be outside the critical WHS region, indicating that WHS is a contiguous gene syndrome.
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Affiliation(s)
- Jacobo Limeres
- Medical-Surgical Dentistry Research Group (OMEQUI), Health Research Institute of Santiago de Compostela (IDIS), University of Santiago de Compostela (USC), 15782 Santiago de Compostela, Spain; (J.L.); (C.S.); (M.D.-F.)
| | - Candela Serrano
- Medical-Surgical Dentistry Research Group (OMEQUI), Health Research Institute of Santiago de Compostela (IDIS), University of Santiago de Compostela (USC), 15782 Santiago de Compostela, Spain; (J.L.); (C.S.); (M.D.-F.)
| | - Joaquin Manuel De Nova
- Department of Stomatology IV, School of Dentistry, University Complutense de Madrid, 28040 Madrid, Spain;
| | | | - Guillermo Machuca
- Department of Special Care in Dentistry, School of Dentistry, University of Seville, 41009 Sevilla, Spain;
| | - Isabel Maura
- Service of Pediatric Dentistry, Barcelona University Children’s Hospital HM Nens, 08009 Barcelona, Spain;
| | | | - Pedro Diz
- Medical-Surgical Dentistry Research Group (OMEQUI), Health Research Institute of Santiago de Compostela (IDIS), University of Santiago de Compostela (USC), 15782 Santiago de Compostela, Spain; (J.L.); (C.S.); (M.D.-F.)
- Correspondence:
| | - Raquel Blanco-Lago
- Service of Neuropediatrics, University Hospital Central de Asturias, 33011 Oviedo, Spain;
| | - Julian Nevado
- Medical and Molecular Genetics Institute (INGEMM), La Paz University Hospital, IdiPAZ, 28046 Madrid, Spain;
- Institute of Rare Diseases Research (IIER) & Centre for Biomedical Network Research on Rare Diseases (CIBERER), Instituto de Salud Carlos III, 28029 Madrid, Spain
- ERN (European Reference Network)-ITHACA, La Paz University Hospital, 28046 Madrid, Spain
| | - Marcio Diniz-Freitas
- Medical-Surgical Dentistry Research Group (OMEQUI), Health Research Institute of Santiago de Compostela (IDIS), University of Santiago de Compostela (USC), 15782 Santiago de Compostela, Spain; (J.L.); (C.S.); (M.D.-F.)
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18
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Berrocoso S, Amayra I, Lázaro E, Martínez O, López-Paz JF, García M, Pérez M, Al-Rashaida M, Rodríguez AA, Luna PM, Pérez-Núñez P, Blanco R, Nevado J. Coping with Wolf-Hirschhorn syndrome: quality of life and psychosocial features of family carers. Orphanet J Rare Dis 2020; 15:293. [PMID: 33076957 PMCID: PMC7574588 DOI: 10.1186/s13023-020-01476-8] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 07/21/2020] [Indexed: 11/24/2022] Open
Abstract
BACKGROUND Wolf-Hirschhorn Syndrome (WHS) is a rare, congenital disease characterized by a distinctive facial phenotype, seizures, intellectual disability and developmental delay, and pre and postnatal growth requiring lifelong care. The psychosocial status of the family caregivers of children diagnosed with WHS is unknown. This study aims to characterize the sociodemographic and psychosocial profile of WHS caregivers and analyze how these variables impact their quality of life (QoL) and well-being. RESULTS The sociodemographic and clinical profile of 22 Spanish caregivers of children with WHS and the characteristics of those affected have been described. Significant relationships were found between sociodemographic and psychosocial characteristics among caregivers. The impact on the parents' QoL and negative relationship with the symptomatology were assessed. The use of engagement strategies such as problem focused coping was associated with improved psychological QoL and social support. CONCLUSIONS WHS caregivers share similarities in their profile and needs with caregivers of children with other rare diseases. Pychosocial support groups involving parents caring for children with the same disease could improve caregivers' well-being and QoL by strengthening their social support network and using positive coping styles.
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Affiliation(s)
- Sarah Berrocoso
- Facultad de Psicología y Educación, Neuro-e-Motion, Investigación sobre aspectos Neuropsicológicos y Psicosociales de las Enfermedades Raras, Universidad de Deusto, Avda. Universidades 24, 48007 Bilbao, Spain
| | - Imanol Amayra
- Facultad de Psicología y Educación, Neuro-e-Motion, Investigación sobre aspectos Neuropsicológicos y Psicosociales de las Enfermedades Raras, Universidad de Deusto, Avda. Universidades 24, 48007 Bilbao, Spain
| | - Esther Lázaro
- Facultad de Psicología y Educación, Neuro-e-Motion, Investigación sobre aspectos Neuropsicológicos y Psicosociales de las Enfermedades Raras, Universidad de Deusto, Avda. Universidades 24, 48007 Bilbao, Spain
| | - Oscar Martínez
- Facultad de Psicología y Educación, Neuro-e-Motion, Investigación sobre aspectos Neuropsicológicos y Psicosociales de las Enfermedades Raras, Universidad de Deusto, Avda. Universidades 24, 48007 Bilbao, Spain
| | - Juan Francisco López-Paz
- Facultad de Psicología y Educación, Neuro-e-Motion, Investigación sobre aspectos Neuropsicológicos y Psicosociales de las Enfermedades Raras, Universidad de Deusto, Avda. Universidades 24, 48007 Bilbao, Spain
| | - Maitane García
- Facultad de Psicología y Educación, Neuro-e-Motion, Investigación sobre aspectos Neuropsicológicos y Psicosociales de las Enfermedades Raras, Universidad de Deusto, Avda. Universidades 24, 48007 Bilbao, Spain
| | - Manuel Pérez
- Facultad de Psicología y Educación, Neuro-e-Motion, Investigación sobre aspectos Neuropsicológicos y Psicosociales de las Enfermedades Raras, Universidad de Deusto, Avda. Universidades 24, 48007 Bilbao, Spain
| | - Mohammad Al-Rashaida
- Facultad de Psicología y Educación, Neuro-e-Motion, Investigación sobre aspectos Neuropsicológicos y Psicosociales de las Enfermedades Raras, Universidad de Deusto, Avda. Universidades 24, 48007 Bilbao, Spain
| | - Alicia Aurora Rodríguez
- Facultad de Psicología y Educación, Neuro-e-Motion, Investigación sobre aspectos Neuropsicológicos y Psicosociales de las Enfermedades Raras, Universidad de Deusto, Avda. Universidades 24, 48007 Bilbao, Spain
| | - Paula Maria Luna
- Facultad de Psicología y Educación, Neuro-e-Motion, Investigación sobre aspectos Neuropsicológicos y Psicosociales de las Enfermedades Raras, Universidad de Deusto, Avda. Universidades 24, 48007 Bilbao, Spain
| | - Paula Pérez-Núñez
- Facultad de Psicología y Educación, Neuro-e-Motion, Investigación sobre aspectos Neuropsicológicos y Psicosociales de las Enfermedades Raras, Universidad de Deusto, Avda. Universidades 24, 48007 Bilbao, Spain
| | - Raquel Blanco
- Hospital Universitario Central de Asturias, Neurología Pediátrica, Oviedo, Spain
| | - Julián Nevado
- INGEMM Hospital Universitario La Paz Madrid, Instituto de Genética Médica y Molecular; CIBERER, Madrid, Spain
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19
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Cammarata-Scalisi F, Blanco Lago R, Barruz Galián P, Lapunzina Badía P, Araque D, Da Silva G, Lacruz-Rengel MA, Avendaño A, Nevado Blanco J. [Wolf-Hirschhorn syndrome. Description of five cases characterized by means of single nucleotide polymorphism microarrays]. ARCH ARGENT PEDIATR 2020; 117:e406-e412. [PMID: 31339285 DOI: 10.5546/aap.2019.e406] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2018] [Accepted: 02/14/2019] [Indexed: 11/12/2022]
Abstract
Wolf-Hirschhorn syndrome is a polymalformative entity due to the microdeletion in the distal region of the short arm of chromosome 4 (4p16.3), which produces a series of clinical manifestations that can vary depending on the type and size of the genetic defect in this contiguous gene syndrome. Five patients are presented, three of them female, all with the primary clinical findings, characterized by "Greek warrior helmet appearance" facial feature, growth retardation and psychomotor development delay. In addition to the partial deletion in the distal region of the short arm of chromosome 4, two additional genetic alterations were found in two patients, through the use of single nucleotide polymorphism arrays. The clinical characteristics of Wolf-Hirschhorn syndrome are highlighted in order to guide the diagnosis, provide interdisciplinary medical care and, through its confirmation, provide adequate family genetic counseling.
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Affiliation(s)
- Francisco Cammarata-Scalisi
- Unidad de Genética Médica, Departamento de Puericultura y Pediatría, Facultad de Medicina, Universidad de Los Andes, Mérida, Venezuela.
| | - Raquel Blanco Lago
- Servicio de Neuropediatría, Hospital Universitario Central de Asturias, Oviedo, España
| | - Pilar Barruz Galián
- Instituto de Genética Médica y Molecular (INGEMM) e Instituto de Investigación del Hospital Universitario La Paz (IdIPaz), Madrid, España
| | - Pablo Lapunzina Badía
- Instituto de Genética Médica y Molecular (INGEMM) e Instituto de Investigación del Hospital Universitario La Paz (IdIPaz), Madrid, España.,Centro de Investigación Biomédica en RED de Enfermedades Raras (CIBERER), Madrid, España
| | - Dianora Araque
- Unidad de Genética Médica, Departamento de Puericultura y Pediatría, Facultad de Medicina, Universidad de Los Andes, Mérida, Venezuela
| | - Gloria Da Silva
- Unidad de Genética Médica, Departamento de Puericultura y Pediatría, Facultad de Medicina, Universidad de Los Andes, Mérida, Venezuela
| | - María A Lacruz-Rengel
- Servicio de Neuropediatría, Departamento de Puericultura y Pediatría, Facultad de Medicina, Universidad de Los Andes, Mérida, Venezuela
| | - Andrea Avendaño
- Unidad de Genética Médica, Departamento de Puericultura y Pediatría, Facultad de Medicina, Universidad de Los Andes, Mérida, Venezuela
| | - Julián Nevado Blanco
- Instituto de Genética Médica y Molecular (INGEMM) e Instituto de Investigación del Hospital Universitario La Paz (IdIPaz), Madrid, España.,Centro de Investigación Biomédica en RED de Enfermedades Raras (CIBERER), Madrid, España
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20
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Kim HJ, You JA, Park S, Kim EJ, Park SJ, Kim HY. Anesthetic considerations for an adult with Wolf-Hirschhorn syndrome - A case report. Anesth Pain Med (Seoul) 2020; 15:120-123. [PMID: 33329800 PMCID: PMC7713862 DOI: 10.17085/apm.2020.15.1.120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2019] [Revised: 06/15/2019] [Accepted: 06/18/2019] [Indexed: 11/17/2022] Open
Abstract
Background Wolf-Hirschhorn syndrome (WHS) includes features such as growth restriction, mental retardation, congenital heart disease, convulsions as well as microcephaly and micrognathia. Thus, the anesthesiologists may have difficulties in airway management, neuromuscular relaxation, and in maintaining hemodynamic stability. Case A 24-year-old man with WHS underwent surgery for closed reduction and internal fixation of the right neck of femur. His face showed features typical of patients with WHS such as a prominent glabella, hypertelorism, micrognathia, low-set malformed ears, and a down-turned mouth. Since difficult airway management was expected, a video-assisted laryngoscope was used for successful intubation. The surgery terminated without any problems under total intravenous anesthesia. Conclusions A patient with WHS may have a variety of problems. Therefore, through careful evaluation of the airway, cardiovascular system, and cerebral nervous system and by making an appropriate anesthetic plan, anesthesiologists can perform a safe general anesthesia in patients with WHS.
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Affiliation(s)
- Hye-Jin Kim
- Department of Anesthesia and Pain Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Jun A You
- Department of Anesthesia and Pain Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Seyeon Park
- Department of Anesthesia and Pain Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Eun-Jung Kim
- Department of Dental Anesthesia and Pain Medicine, Pusan National University Dental Hospital, Yangsan, Korea
| | - Soon Ji Park
- Department of Anesthesia and Pain Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea
| | - Hee Young Kim
- Department of Anesthesia and Pain Medicine, Pusan National University Yangsan Hospital, Yangsan, Korea
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21
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Jiang Y, Sun H, Lin Q, Wang Z, Wang G, Wang J, Jiang F, Yao R. De novo truncating variant in NSD2gene leading to atypical Wolf-Hirschhorn syndrome phenotype. BMC Med Genet 2019; 20:134. [PMID: 31382906 PMCID: PMC6683463 DOI: 10.1186/s12881-019-0863-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/14/2019] [Accepted: 07/23/2019] [Indexed: 12/20/2022]
Abstract
Background Wolf-Hirschhorn syndrome (WHS) is a contiguous gene syndrome caused by partial 4p deletion highly variable in size in individual patients. The core WHS phenotype is defined by the association of growth delay, typical facial characteristics, intellectual disability and seizures. The WHS critical region (WHSCR) has been narrowed down and NSD2 falls within this 200 kb region. Only four patients with NSD2 variants have been documented with phenotypic features in detail. Case presentation Herein, we report the case of a 12-year-old boy with developmental delay. He had dysmorphic facial features including wide-spaced eyes, prominent nasal bridge continuing to forehead, abnormal teething and micrognathia. He also had mild clinodactyly of both hands. Using whole-exome sequencing, we identified a pathogenic mutation in NSD2 [c.4029_4030insAA, p.Glu1344Lysfs*49] isolated from peripheral blood DNA. Sanger confirmation of this variant revealed it as a de novo truncating variant in the family. Conclusion Here, we reported a boy with de novo truncating variant in NSD2 with atypical clinical features comparing with 4p16.3 deletion related WHS. Our finding further supported the pathogenesis of truncating variants in NSD2 and delineated the possible symptom spectrum caused by these variants.
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Affiliation(s)
- Yanrui Jiang
- Department of Developmental and Behavioral Pediatrics, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, 1678 Dongfang Road, Shanghai, 200127, People's Republic of China.,MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai, 200127, People's Republic of China
| | - Huizhen Sun
- Department of Urology, Shanghai Children's Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, 200127, People's Republic of China
| | - Qingmin Lin
- Department of Developmental and Behavioral Pediatrics, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, 1678 Dongfang Road, Shanghai, 200127, People's Republic of China.,MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai, 200127, People's Republic of China
| | - Zengge Wang
- Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, 1678 Dongfang Road, Shanghai, 200127, People's Republic of China
| | - Guanghai Wang
- Department of Developmental and Behavioral Pediatrics, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, 1678 Dongfang Road, Shanghai, 200127, People's Republic of China.,MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai, 200127, People's Republic of China
| | - Jian Wang
- Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, 1678 Dongfang Road, Shanghai, 200127, People's Republic of China
| | - Fan Jiang
- Department of Developmental and Behavioral Pediatrics, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, 1678 Dongfang Road, Shanghai, 200127, People's Republic of China. .,MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai, 200127, People's Republic of China.
| | - Ruen Yao
- Department of Medical Genetics and Molecular Diagnostic Laboratory, Shanghai Children's Medical Center, Shanghai Jiao Tong University School of Medicine, 1678 Dongfang Road, Shanghai, 200127, People's Republic of China.
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22
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Mozer Joaquim T, Paiva Grangeiro CH, Gaona de Oliveira Gennaro F, Galvão Gomes A, Squire JA, Martelli LR. Partial Monosomy 4p and Trisomy 12q due to a t(4;12)(p16.3;q24.31) Familial Translocation in Two Cousins. Mol Syndromol 2019; 10:264-271. [PMID: 32021597 DOI: 10.1159/000501923] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/25/2019] [Indexed: 11/19/2022] Open
Abstract
Wolf-Hirschhorn syndrome (WHS) is caused by a distal 4p monosomy usually involving the region of the WHSC1 and WHSC2 genes. About 40-45% of WHS patients show an unbalanced translocation leading to both 4p monosomy and partial trisomy of another chromosome arm. In this case report, we describe 2 female cousins (P1 and P2) with a derivative chromosome leading to a 4p16.3pter deletion and 12q24.31qter duplication. Conventional karyotyping and genomic analyses showed that they both had the same rearrangement derived from a balanced parental translocation involving chromosomes 4 and 12, t(4;12)(p16.3;q24.31). The rearrangements occurred between 4p16.3pter and 12q24.31qter detected by array-CGH analysis, with a 2.7-Mb loss at 4p and a large 12.4-Mb gain at 12q. Both affected patients shared global developmental delay and craniofacial dysmorphisms with some distinct phenotypic findings associated with both WHS and 12qter trisomy. P2 was more severely impaired than P1, and she showed severe intellectual disability, seizures, midface hypoplasia, unilateral microtia, and deafness which were absent in P1. Previous studies of distal 4p monosomies have found phenotypic variability in WHS which does not correlate with haploinsufficiency of specific genes. Features of 12q trisomies are diverse with developmental and growth delay, intellectual disability, behavioral problems, and facial abnormalities. Collectively, our analysis of the literature of 3 similar translocations involving 4p and 12q, together with the clinical features of the affected cousins in this familial translocation, permits an evaluation of genes closely linked to WHSC1 and WHSC2 in the context of WHS and the genes involved in 12q trisomy.
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Affiliation(s)
- Tatiana Mozer Joaquim
- Department of Genetics, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Carlos H Paiva Grangeiro
- Department of Genetics, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.,Medical Genetics Section, Clinical Hospital of Ribeirão Preto, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | | | - Alexandra Galvão Gomes
- Department of Genetics, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
| | - Jeremy A Squire
- Department of Genetics, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.,Department of Pathology and Molecular Medicine, Queen's University, Kingston, Canada
| | - Lucia R Martelli
- Department of Genetics, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil.,Medical Genetics Section, Clinical Hospital of Ribeirão Preto, Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, Brazil
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23
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Lin QT, Stathopulos PB. Molecular Mechanisms of Leucine Zipper EF-Hand Containing Transmembrane Protein-1 Function in Health and Disease. Int J Mol Sci 2019; 20:E286. [PMID: 30642051 DOI: 10.3390/ijms20020286] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2018] [Revised: 01/08/2019] [Accepted: 01/09/2019] [Indexed: 02/07/2023] Open
Abstract
Mitochondrial calcium (Ca2+) uptake shapes cytosolic Ca2+ signals involved in countless cellular processes and more directly regulates numerous mitochondrial functions including ATP production, autophagy and apoptosis. Given the intimate link to both life and death processes, it is imperative that mitochondria tightly regulate intramitochondrial Ca2+ levels with a high degree of precision. Among the Ca2+ handling tools of mitochondria, the leucine zipper EF-hand containing transmembrane protein-1 (LETM1) is a transporter protein localized to the inner mitochondrial membrane shown to constitute a Ca2+/H+ exchanger activity. The significance of LETM1 to mitochondrial Ca2+ regulation is evident from Wolf-Hirschhorn syndrome patients that harbor a haplodeficiency in LETM1 expression, leading to dysfunctional mitochondrial Ca2+ handling and from numerous types of cancer cells that show an upregulation of LETM1 expression. Despite the significance of LETM1 to cell physiology and pathophysiology, the molecular mechanisms of LETM1 function remain poorly defined. In this review, we aim to provide an overview of the current understanding of LETM1 structure and function and pinpoint the knowledge gaps that need to be filled in order to unravel the underlying mechanistic basis for LETM1 function.
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24
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Battaglia A, Calhoun ARUL, Lortz A, Carey JC. Risk of hepatic neoplasms in Wolf-Hirschhorn syndrome (4p-): Four new cases and review of the literature. Am J Med Genet A 2018; 176:2389-2394. [PMID: 30289612 DOI: 10.1002/ajmg.a.40469] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2017] [Revised: 05/18/2018] [Accepted: 06/18/2018] [Indexed: 01/02/2023]
Abstract
Wolf-Hirschhorn syndrome (WHS) is a rare contiguous gene deletion disorder characterized by distinctive craniofacial features, prenatal/postnatal growth deficiency, intellectual disability, and seizures. Various malformations of internal organs are also seen. Neoplasia has not been documented as a typical feature of WHS. We review the three prior reports of hepatic neoplasia in WHS and add four previously unreported individuals. We propose that, in the context of the rarity of WHS, these seven cases suggest that hepatocellular neoplasia may be a feature of WHS.
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Affiliation(s)
- Agatino Battaglia
- The Stella Maris Clinical Research Institute for Child and Adolescent Neurology and Psychiatry, Pisa, Italy
| | - Amy R U L Calhoun
- Stead Family Department of Pediatrics, Division of Medical Genetics, University of Iowa, Iowa City, Iowa
| | | | - John C Carey
- Division of Medical Genetics, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, Utah
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25
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Bernardini L, Radio FC, Acquaviva F, Gorgone C, Postorivo D, Torres B, Alesi V, Magliozzi M, Lonardo F, Monica MD, Nardone AM, Cesario C, Mattina T, Scarano G, Dallapiccola B, Digilio MC, Novelli A. Small 4p16.3 deletions: Three additional patients and review of the literature. Am J Med Genet A 2018; 176:2501-2508. [PMID: 30244530 DOI: 10.1002/ajmg.a.40512] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2017] [Revised: 01/05/2018] [Accepted: 07/17/2018] [Indexed: 11/11/2022]
Abstract
Wolf-Hirschhorn syndrome is a well-defined disorder due to 4p16.3 deletion, characterized by distinct facial features, intellectual disability, prenatal and postnatal growth retardation, and seizures. Genotype-phenotype correlations based on differently sized deletions have been attempted, and some candidate genes have been suggested. We report on clinical characteristics of three patients with pure interstitial submicroscopic 4p16.3 deletions, ranging in size from 68 to 166 kb, involving WHSCR1 and/or part of WHSCR2, and review published cases with overlapping 4p16.3 losses. The present study highlights a major role of NSD2 gene in the pathogenesis of the WHS main features and predicts that loss-of-function mutations affecting NSD2 gene could result in microcephaly, prenatal and postnatal growth retardation, psychomotor and language delay, and craniofacial features. Absent seizures in all subjects corroborate the suggestion that this specific feature is causally linked with at least one additional causative gene. Finally, we suggest that mir-943 could play a role in the pathogenesis of CHD in some of these patients.
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Affiliation(s)
- Laura Bernardini
- Cytogenetics Unit, IRCCS "Casa Sollievo della Sofferenza", San Giovanni Rotondo, Italy
| | - Francesca C Radio
- Medical Genetics Unit and Laboratory of Medical Genetics, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | - Fabio Acquaviva
- Medical Genetics Unit, A.O.R.N. "G. Rummo", Benevento, Italy
| | | | - Diana Postorivo
- Laboratory of Medical Genetics, Policlinico Tor Vergata, Rome, Italy
| | - Barbara Torres
- Cytogenetics Unit, IRCCS "Casa Sollievo della Sofferenza", San Giovanni Rotondo, Italy
| | - Viola Alesi
- Medical Genetics Unit and Laboratory of Medical Genetics, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | - Monia Magliozzi
- Medical Genetics Unit and Laboratory of Medical Genetics, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | | | - Matteo Della Monica
- Medical Genetics and Laboratory of Medical Genetics Unit, A.O. "Antonio Cardarelli", Naples, Italy
| | - Anna M Nardone
- Laboratory of Medical Genetics, Policlinico Tor Vergata, Rome, Italy
| | - Claudia Cesario
- Medical Genetics Unit and Laboratory of Medical Genetics, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | | | | | - Bruno Dallapiccola
- Medical Genetics Unit and Laboratory of Medical Genetics, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | - Maria C Digilio
- Medical Genetics Unit and Laboratory of Medical Genetics, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
| | - Antonio Novelli
- Medical Genetics Unit and Laboratory of Medical Genetics, Ospedale Pediatrico Bambino Gesù, IRCCS, Rome, Italy
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Campos-Sanchez E, Deleyto-Seldas N, Dominguez V, Carrillo-de-Santa-Pau E, Ura K, Rocha PP, Kim J, Aljoufi A, Esteve-Codina A, Dabad M, Gut M, Heyn H, Kaneda Y, Nimura K, Skok JA, Martinez-Frias ML, Cobaleda C. Wolf-Hirschhorn Syndrome Candidate 1 Is Necessary for Correct Hematopoietic and B Cell Development. Cell Rep 2018; 19:1586-1601. [PMID: 28538178 DOI: 10.1016/j.celrep.2017.04.069] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2016] [Revised: 02/20/2017] [Accepted: 04/24/2017] [Indexed: 12/21/2022] Open
Abstract
Immunodeficiency is one of the most important causes of mortality associated with Wolf-Hirschhorn syndrome (WHS), a severe rare disease originated by a deletion in chromosome 4p. The WHS candidate 1 (WHSC1) gene has been proposed as one of the main genes responsible for many of the alterations in WHS, but its mechanism of action is still unknown. Here, we present in vivo genetic evidence showing that Whsc1 plays an important role at several points of hematopoietic development. Particularly, our results demonstrate that both differentiation and function of Whsc1-deficient B cells are impaired at several key developmental stages due to profound molecular defects affecting B cell lineage specification, commitment, fitness, and proliferation, demonstrating a causal role for WHSC1 in the immunodeficiency of WHS patients.
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Affiliation(s)
- Elena Campos-Sanchez
- Department of Cell Biology and Immunology, Centro de Biologia Molecular Severo Ochoa (CBMSO), CSIC/UAM, Madrid 28049, Spain
| | - Nerea Deleyto-Seldas
- Department of Cell Biology and Immunology, Centro de Biologia Molecular Severo Ochoa (CBMSO), CSIC/UAM, Madrid 28049, Spain
| | | | - Enrique Carrillo-de-Santa-Pau
- Epithelial Carcinogenesis Group, Cancer Cell Biology Programme, Spanish National Cancer Research Centre (CNIO), Madrid 28029, Spain
| | - Kiyoe Ura
- Department of Biology, Graduate School of Science, Chiba University, Yayoicho, Inage-ku, Chiba 263-8522, Japan
| | - Pedro P Rocha
- Department of Pathology, New York University School of Medicine, New York, NY 10016, USA
| | - JungHyun Kim
- Department of Pathology, New York University School of Medicine, New York, NY 10016, USA
| | - Arafat Aljoufi
- Department of Pathology, New York University School of Medicine, New York, NY 10016, USA
| | - Anna Esteve-Codina
- CNAG-CRG, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology (BIST), Barcelona 08028, Spain; Universitat Pompeu Fabra (UPF), Barcelona 08002, Spain
| | - Marc Dabad
- CNAG-CRG, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology (BIST), Barcelona 08028, Spain; Universitat Pompeu Fabra (UPF), Barcelona 08002, Spain
| | - Marta Gut
- CNAG-CRG, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology (BIST), Barcelona 08028, Spain; Universitat Pompeu Fabra (UPF), Barcelona 08002, Spain
| | - Holger Heyn
- CNAG-CRG, Centre for Genomic Regulation (CRG), Barcelona Institute of Science and Technology (BIST), Barcelona 08028, Spain; Universitat Pompeu Fabra (UPF), Barcelona 08002, Spain
| | - Yasufumi Kaneda
- Division of Gene Therapy Science, Graduate School of Medicine, Osaka University, Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Keisuke Nimura
- Division of Gene Therapy Science, Graduate School of Medicine, Osaka University, Yamada-oka, Suita, Osaka 565-0871, Japan
| | - Jane A Skok
- Department of Pathology, New York University School of Medicine, New York, NY 10016, USA
| | - Maria Luisa Martinez-Frias
- ECEMC (Spanish Collaborative Study of Congenital Malformations), Madrid 28029, Spain; CIAC (Research Center on Congenital Anomalies), Institute of Health Carlos III (ISCIII), Madrid 28029, Spain; CIBER de Enfermedades Raras (CIBERER), U724, Madrid 28029, Spain
| | - Cesar Cobaleda
- Department of Cell Biology and Immunology, Centro de Biologia Molecular Severo Ochoa (CBMSO), CSIC/UAM, Madrid 28049, Spain.
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27
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Ali MH, Azar NF, Aakalu V, Chau FY, Abbasian J, Setabutr P, Maumenee IH. Congenital cavitary optic disc anomaly and Axenfeld's anomaly in Wolf-Hirschhorn syndrome: A case report and review of the literature. Ophthalmic Genet 2017; 39:271-274. [PMID: 29199884 DOI: 10.1080/13816810.2017.1408850] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
BACKGROUND Wolf-Hirschhorn syndrome is a rare genetic syndrome caused by a heterozygous deletion on chromosome 4p16.3 and is characterized by a "Greek warrior helmet" facies, hypotonia, developmental delay, seizures, structural central nervous system defects, intrauterine growth restriction, sketelal anomalies, cardiac defects, abnormal tooth development, and hearing loss. A variety of ocular manifestations may occur in up to 40% of patients. MATERIALS/METHODS We report the genetic testing results, systemic findings, and complete ophthalmologic examination findings in a patient with Wolf-Hirschhorn syndrome, including external photography, RetCam3 (Clarity Medical Systems, Pleasonton, CA) goniography, and fundus photography. In addition, we review the literature on ocular manifestations of Wolf-Hirschhorn syndrome. RESULTS Microarray analysis revealed an unbalanced translocation between 4p16.3-15.3 and Xp22.33-p22.2. Systemic findings included "Greek warrior helmet" facies, hypotonia, cleft palate, neonatal tooth eruption, talipes equinovarus, bilateral clinodactyly, clitoromegaly, partial agenesis of the corpus callosum, bilateral renal hypoplasia, and two atrial septal defects. Ocular findings included normal intraocular pressures and corneal diameters, large-angle exotropia, downward slanting of the palpebral fissures, absent eyelid creases, upper and lower eyelid retraction with shortage of the anterior eyelid lamellae, euryblepharon, lagophthalmos with poor Bell's reflex and exposure keratopathy, hypertelorism, Axenfeld's anomaly, megalopapillae, and cavitary optic disc anomaly. CONCLUSIONS We describe the ocular phenotype of a patient with Wolf-Hirschhorn syndrome, including the rare descriptions and photographs of Axenfeld's anomaly, megalopapilla, and cavitary optic disc anomaly in this condition.
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Affiliation(s)
- Mohsin H Ali
- a Department of Ophthalmology and Visual Sciences , University of Illinois at Chicago, Illinois Eye and Ear Infirmary , Chicago , IL, USA
| | - Nathalie F Azar
- a Department of Ophthalmology and Visual Sciences , University of Illinois at Chicago, Illinois Eye and Ear Infirmary , Chicago , IL, USA
| | - Vinay Aakalu
- a Department of Ophthalmology and Visual Sciences , University of Illinois at Chicago, Illinois Eye and Ear Infirmary , Chicago , IL, USA
| | - Felix Y Chau
- a Department of Ophthalmology and Visual Sciences , University of Illinois at Chicago, Illinois Eye and Ear Infirmary , Chicago , IL, USA
| | - Javaneh Abbasian
- a Department of Ophthalmology and Visual Sciences , University of Illinois at Chicago, Illinois Eye and Ear Infirmary , Chicago , IL, USA
| | - Pete Setabutr
- a Department of Ophthalmology and Visual Sciences , University of Illinois at Chicago, Illinois Eye and Ear Infirmary , Chicago , IL, USA
| | - Irene H Maumenee
- a Department of Ophthalmology and Visual Sciences , University of Illinois at Chicago, Illinois Eye and Ear Infirmary , Chicago , IL, USA
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Bayhan T, Aydin B, Yalcin B, Orhan D, Akyuz C. Hepatoblastoma and Wolf-Hirschhorn syndrome: Coincidence or a new feature of a rare disease? Pediatr Int 2017; 59:1028-1029. [PMID: 28786167 DOI: 10.1111/ped.13345] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2016] [Revised: 03/29/2017] [Accepted: 06/13/2017] [Indexed: 01/04/2023]
Affiliation(s)
- Turan Bayhan
- Department of Pediatric Oncology, Cancer Institute, Hacettepe University, Ankara, Turkey
| | - Burca Aydin
- Department of Pediatric Oncology, Cancer Institute, Hacettepe University, Ankara, Turkey
| | - Bilgehan Yalcin
- Department of Pediatric Oncology, Cancer Institute, Hacettepe University, Ankara, Turkey
| | - Diclehan Orhan
- Department of Pathology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Canan Akyuz
- Department of Pediatric Oncology, Cancer Institute, Hacettepe University, Ankara, Turkey
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Abstract
In this interview, Kurt and Rochelle Hirschhorn talk with their son, Joel, about their research and collaborations, the early years of medical genetics, the development of genetic counseling, the challenges of being a woman in science, and new challenges and directions for the study of human genetics.
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Affiliation(s)
- Kurt Hirschhorn
- Icahn School of Medicine at Mount Sinai, New York, NY 10029;
| | - Rochelle Hirschhorn
- Department of Medicine, New York University School of Medicine, New York, NY 10016;
| | - Joel N Hirschhorn
- Program in Medical and Population Genetics, The Broad Institute of MIT and Harvard, Cambridge, Massachusetts 02142; .,Division of Endocrinology and Center for Basic and Translational Obesity Research, Boston Children's Hospital, Boston, Massachusetts 02115
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30
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Šumanović-Glamuzina D, Lozić B, Iwanowski PS, Zemunik T, Bilinovac Z, Stasiewicz-Jarocka B, Panasiuk B, Midro AT. Limited survivability of unbalanced progeny of carriers of a unique t(4;19)(p15.32;p13.3): a study in multiple generations. Mol Cytogenet 2017; 10:29. [PMID: 28785312 PMCID: PMC5545035 DOI: 10.1186/s13039-017-0330-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 07/26/2017] [Indexed: 11/22/2022] Open
Abstract
Background Carriership of a reciprocal chromosomal translocation (RCT) involving the short arm of chromosome 4 (4p) may result in birth of a child with Wolf-Hirschhorn syndrome (WHS) due to monosomy 4p, a priori modified by the impact of the partner chromosome imbalance. Familial transmission studies of RCT enable obtaining empirical risk figures that are essential for genetic counseling. In this study, pedigree data from carriers of a unique t(4;19)(p15.32;p13.3), ascertained by two children with WHS phenotype, were collected through five generations and empirical risk for different pregnancy outcomes was assessed. In addition, the phenotype-karyotype correlation was studied in two unbalanced children against the phenotypes of children (literature data) with pure monosomy 4p15.32 → pter and pure trisomy 19p13.3 → pter, accordingly. The phenotype analysis was conducted using the catalogue of traits according to the Munich Dysmorphology Database. Pedigree segregation analysis was conducted by the direct method according to Stengel- Rutkowski et al. Results A double segment imbalance, trisomy 19p13.3 → pter with monosomy 4p15.32 → pter, was diagnosed in WHS progeny at birth. No essential modification of WHS phenotype by the additional trisomy 19p was observed, except for a limited survivability (death in infancy). Pedigree segregation analysis covered 39 relatives showed the probability rate for liveborn with unbalanced karyotype of 3.7 ± 3.6% (1/27), for stillbirth/neonatal death at 7.4 ± 5.0% (2/27), for miscarriage at 22.2 ± 8.0% (6/27), for the chance of having a baby without unbalanced karyotype was estimated at 66.7 ± 9.1% (18/27). In addition, the value of 7.4% for genetic counseling for any carrier of RCT at risk for single segment 19p13.3 → pter imbalance at birth was evaluated as such value have not been estimated so far. Conclusion Carriership of a t(4;19)(p15.32;p13.3) is at low risk for an unbalanced child at birth and for stillbirth/neonatal death but high for miscarriages. The chance of having a baby without unbalanced karyotype was estimated to be high. Monosomy 4p15.32 → pter together with trisomy 19p13.3 → pter as a double segment imbalance in children with WHS may be connected with a limited survivability in infancy. Electronic supplementary material The online version of this article (doi:10.1186/s13039-017-0330-8) contains supplementary material, which is available to authorized users.
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Affiliation(s)
| | - Bernarda Lozić
- Department of Pediatrics, University Hospital Centre Split, Split, Croatia
| | - Piotr S Iwanowski
- Department of Clinical Genetics, Medical University of Bialystok, Waszyngtona St. 13, PO Box 22, 15-089 Białystok, Poland
| | - Tatijana Zemunik
- Department of Medical Biology, School of Medicine Split, University of Split, Split, Croatia
| | - Zeljka Bilinovac
- Department of Pediatrics, University Hospital Mostar, Mostar, Bosnia and Herzegovina
| | - Beata Stasiewicz-Jarocka
- Department of Clinical Genetics, Medical University of Bialystok, Waszyngtona St. 13, PO Box 22, 15-089 Białystok, Poland
| | - Barbara Panasiuk
- Department of Clinical Genetics, Medical University of Bialystok, Waszyngtona St. 13, PO Box 22, 15-089 Białystok, Poland
| | - Alina T Midro
- Department of Clinical Genetics, Medical University of Bialystok, Waszyngtona St. 13, PO Box 22, 15-089 Białystok, Poland
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31
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Mbuyi-Musanzayi S, Lumaka A, Kasole TL, Ilunga EK, Asani BY, Tshilobo PL, Muenze PK, Reychler H, Katombe FT, Devriendt K. Wolf-Hirschhorn Syndrome: Clinical and Genetic Data from a First Case Diagnosed in Central Africa. J Pediatr Genet 2017; 6:186-190. [PMID: 28794913 DOI: 10.1055/s-0037-1599194] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2016] [Accepted: 01/18/2017] [Indexed: 12/19/2022]
Abstract
Wolf-Hirschhorn syndrome (WHS) is a multiple congenital anomaly-intellectual disability syndrome caused by a deletion involving chromosome 4p16.3. We report clinical and genetic findings of the first WHS patient diagnosed in central Africa. This boy who presented with cleft palate, microcephaly, severe growth delay, and intellectual disability was 12 years old. Typical craniofacial features were present, though the characteristic "Greek helmet" appearance of the nose was less evident, probably reflecting a variable expression related to the genetic background. The clinical diagnosis of WHS was confirmed by array CGH, which revealed a terminal 4p16.3 deletion of 3.47 Mb, typically associated with a milder phenotype, contributing to the long survival of this child in a developing country.
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Affiliation(s)
- Sébastien Mbuyi-Musanzayi
- Department of Surgery, University Hospital, University of Lubumbashi, Lubumbashi, DR Congo.,Center for Human Genetics, Faculty of Medicine, University of Lubumbashi, Lubumbashi, DR Congo
| | - Aimé Lumaka
- Center for Human Genetics, University Hospital, Katholieke Universiteit Leuven, Leuven, Belgium.,Department of Pediatrics, University Hospital, University of Kinshasa, Kin XI, Kinshasa, The Democratic Republic of the Congo.,Center for Human Genetics, Faculty of Medicine, University of Kinshasa, Kin XI, Kinshasa, The Democratic Republic of the Congo.,Institut National de Recherche Biomedicale, Kinshasa, The Democratic Republic of the Congo
| | - Toni Lubala Kasole
- Center for Human Genetics, Faculty of Medicine, University of Lubumbashi, Lubumbashi, DR Congo.,Department of Pediatrics, University Hospital, University of Lubumbashi, Lubumbashi, DR Congo
| | - Erick Kasamba Ilunga
- Center for Human Genetics, Faculty of Medicine, University of Lubumbashi, Lubumbashi, DR Congo.,Department of Basic sciences, University Hospital, University of Lubumbashi, Lubumbashi, DR Congo
| | - Bienvenu Yogolelo Asani
- Center for Human Genetics, Faculty of Medicine, University of Lubumbashi, Lubumbashi, DR Congo.,Department of Ophthalmology, University Hospital, University of Lubumbashi, Lubumbashi, DR Congo
| | - Prosper Lukusa Tshilobo
- Center for Human Genetics, University Hospital, Katholieke Universiteit Leuven, Leuven, Belgium.,Department of Pediatrics, University Hospital, University of Kinshasa, Kin XI, Kinshasa, The Democratic Republic of the Congo.,Center for Human Genetics, Faculty of Medicine, University of Kinshasa, Kin XI, Kinshasa, The Democratic Republic of the Congo.,Institut National de Recherche Biomedicale, Kinshasa, The Democratic Republic of the Congo
| | - Prosper Kalenga Muenze
- Center for Human Genetics, Faculty of Medicine, University of Lubumbashi, Lubumbashi, DR Congo.,Department of Basic sciences, University Hospital, University of Lubumbashi, Lubumbashi, DR Congo.,Department of Gynecology, University Hospital, University of Lubumbashi, Lubumbashi, DR Congo
| | - Hervé Reychler
- Department of Oral and Maxillofacial surgery, University Hospital, UC Louvain, Brussels, Belgium
| | | | - Koenraad Devriendt
- Center for Human Genetics, University Hospital, Katholieke Universiteit Leuven, Leuven, Belgium
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Abstract
Complex, and sometimes intractable, seizures affect the quality of life and cognitive development of over 90% of individuals with Wolf-Hirschhorn syndrome (WHS). Fine resolution genotype-phenotype mapping of the WHS locus recently identified a candidate gene whose probable function has led to insights into a mechanism connecting WHS seizures with those of Dravet syndrome, a distinct condition caused by mutations in SCN1A and SCN1B. In addition to this possible molecular mechanistic connection, these disorders' seizures share a strikingly similar constellation of features, including clinical presentation, seizure types, early age of onset, EEG pattern, and responses to specific anti-epileptic drugs. Based in part on these similarities, we suggest that a highly successful Phase III clinical trial of a formulation of cannabidiol for Dravet syndrome seizures may be directly translatable into possible benefits for WHS individuals with challenging seizure patterns. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Karen S Ho
- Lineagen, Inc., Salt Lake City, Utah.,Department of Pediatrics, School of Medicine, University of Utah, Salt Lake City, Utah
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33
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Abstract
Wolf-Hirschhorn syndrome (WHS) encompasses multiple congenital anomalies and mental retardation and is caused by partial deletions in the short arm of chromosome 4. Prenatal-onset growth deficiency is one of the WHS characteristics. Assessing and recording growth profiles of patients with WHS were the aims of this study. Anonymous questionnaire surveys were conducted with cooperation of a WHS peer-support group in Japan, and data from 34 WHS patients (12 males and 22 females; age, 1-23 years) were retrospectively collected. Height, weight, and head circumference (occipitofrontal head circumference) were measured and plotted on the standard growth charts of healthy Japanese children. Results indicated that most WHS patients showed growth retardation under the 3rd percentile since the first year of life and extremely poor body-weight gain after pubertal age. These findings are characteristic of WHS patients. The assessed growth patterns in this study could help monitoring and documentation of growth of WHS patients.
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Affiliation(s)
- Keiko Shimojima
- Tokyo Women' Medical University Institute for Integrated Medical Sciences, Tokyo, Japan
| | - Toshiyuki Yamamoto
- Tokyo Women' Medical University Institute for Integrated Medical Sciences, Tokyo, Japan
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34
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Piccione M, Salzano E, Vecchio D, Ferrara D, Malacarne M, Pierluigi M, Ferrara I, Corsello G. 4p16.1-p15.31 duplication and 4p terminal deletion in a 3-years old Chinese girl: Array-CGH, genotype-phenotype and neurological characterization. Eur J Paediatr Neurol 2015; 19:477-83. [PMID: 25769226 DOI: 10.1016/j.ejpn.2015.02.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 02/03/2015] [Accepted: 02/10/2015] [Indexed: 10/23/2022]
Abstract
BACKGROUND Microscopically chromosome rearrangements of the short arm of chromosome 4 include the two known clinical entities: partial trisomy 4p and deletions of the Wolf-Hirschhorn critical regions 1 and 2 (WHSCR-1 and WHSCR-2, respectively), which cause cranio-facial anomalies, congenital malformations and developmental delay/intellectual disability. METHODS/RESULTS We report on clinical findings detected in a Chinese patient with a de novo 4p16.1-p15.32 duplication in association with a subtle 4p terminal deletion of 6 Mb in size. This unusual chromosome imbalance resulted in WHS classical phenotype, while clinical manifestations of 4p trisomy were practically absent. CONCLUSION This observation suggests the hypothesis that haploinsufficiency of sensitive dosage genes with regulatory function placed in WHS critical region, is more pathogenic than concomitant 4p duplicated segment. Additionally clinical findings in our patient confirm a variable penetrance of major malformations and neurological features in Chinese children despite of WHS critical region's deletion.
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Affiliation(s)
- Maria Piccione
- Department of Sciences for Health Promotion and Mother and Child Care, University of Palermo, Palermo, Italy.
| | - Emanuela Salzano
- Department of Sciences for Health Promotion and Mother and Child Care, University of Palermo, Palermo, Italy
| | - Davide Vecchio
- Department of Sciences for Health Promotion and Mother and Child Care, University of Palermo, Palermo, Italy
| | - Dante Ferrara
- Department of Sciences for Health Promotion and Mother and Child Care, University of Palermo, Palermo, Italy
| | | | - Mauro Pierluigi
- Laboratory of Human Genetics, Galliera Hospital, Genoa, Italy
| | - Ines Ferrara
- Department of Sciences for Health Promotion and Mother and Child Care, University of Palermo, Palermo, Italy
| | - Giovanni Corsello
- Department of Sciences for Health Promotion and Mother and Child Care, University of Palermo, Palermo, Italy
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35
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Arakawa C, Fujita Y, Fuchigami T, Kawamura Y, Ishii W, Endo A, Kohira R, Takahashi S. Affinity for music in Wolf-Hirschhorn syndrome: two case reports. Pediatr Neurol 2014; 51:550-2. [PMID: 25266617 DOI: 10.1016/j.pediatrneurol.2014.07.012] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/23/2014] [Revised: 07/09/2014] [Accepted: 07/09/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND Wolf-Hirschhorn syndrome is a congenital malformation syndrome resulting from deletion of the short arm of chromosome 4. Individuals with Wolf-Hirschhorn syndrome may have a "Greek warrior helmet" appearance, growth retardation, developmental delay, muscular hypotonia, epilepsy, and difficulty with language including verbal communication. An affinity for music has not previously been reported in these patients. PATIENTS We describe two patients with Wolf-Hirschhorn syndrome who both have a strong affinity for music. One patient is a 20-year-old woman who likes to listen to music all day and can hum many tunes. The other patient is a 9-year-old girl who is calmed by music and received music therapy, with subsequent improvement in her communication skills (eye contact, joint attention, and vocalizations to request music). CONCLUSIONS Individuals with Wolf-Hirschhorn syndrome may have a strong affinity for music and may benefit from music therapy. Additional studies are needed to investigate the interest in music in individuals with Wolf-Hirschhorn syndrome.
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Affiliation(s)
- Chikako Arakawa
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo, Japan
| | - Yukihiko Fujita
- Division of Medical Education Planning, Nihon University School of Medicine, Tokyo, Japan
| | - Tatsuo Fuchigami
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo, Japan.
| | - Yuki Kawamura
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo, Japan
| | - Wakako Ishii
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo, Japan
| | - Ayumi Endo
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo, Japan
| | - Ryutaro Kohira
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo, Japan
| | - Shori Takahashi
- Department of Pediatrics and Child Health, Nihon University School of Medicine, Tokyo, Japan
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Doonan PJ, Chandramoorthy HC, Hoffman NE, Zhang X, Cárdenas C, Shanmughapriya S, Rajan S, Vallem S, Chen X, Foskett JK, Cheung JY, Houser SR, Madesh M. LETM1-dependent mitochondrial Ca2+ flux modulates cellular bioenergetics and proliferation. FASEB J 2014; 28:4936-49. [PMID: 25077561 DOI: 10.1096/fj.14-256453] [Citation(s) in RCA: 84] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Dysregulation of mitochondrial Ca(2+)-dependent bioenergetics has been implicated in various pathophysiological settings, including neurodegeneration and myocardial infarction. Although mitochondrial Ca(2+) transport has been characterized, and several molecules, including LETM1, have been identified, the functional role of LETM1-mediated Ca(2+) transport remains unresolved. This study examines LETM1-mediated mitochondrial Ca(2+) transport and bioenergetics in multiple cell types, including fibroblasts derived from patients with Wolf-Hirschhorn syndrome (WHS). The results show that both mitochondrial Ca(2+) influx and efflux rates are impaired in LETM1 knockdown, and similar phenotypes were observed in ΔEF hand, (D676A D688K)LETM1 mutant-overexpressed cells, and in cells derived from patients with WHS. Although LETM1 levels were lower in WHS-derived fibroblasts, the mitochondrial Ca(2+) uniporter components MCU, MCUR1, and MICU1 remain unaltered. In addition, the MCU mitoplast patch-clamp current (IMCU) was largely unaffected in LETM1-knockdown cells. Silencing of LETM1 also impaired basal mitochondrial oxygen consumption, possibly via complex IV inactivation and ATP production. Remarkably, LETM1 knockdown also resulted in increased reactive oxygen species production. Further, LETM1 silencing promoted AMPK activation, autophagy, and cell cycle arrest. Reconstitution of LETM1 or antioxidant overexpression rescued mitochondrial Ca(2+) transport and bioenergetics. These findings reveal the role of LETM1-dependent mitochondrial Ca(2+) flux in shaping cellular bioenergetics.
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Affiliation(s)
| | | | | | | | - César Cárdenas
- Anatomy and Developmental Biology Program, Institute of Biomedical Sciences, University of Chile, Santiago, Chile; and
| | | | - Sudarsan Rajan
- Department of Biochemistry, Center for Translational Medicine
| | - Sandhya Vallem
- Department of Biochemistry, Center for Translational Medicine
| | - Xiongwen Chen
- Cardiovascular Research Center, and Department of Physiology, Temple University School of Medicine, Philadelphia, Pennsylvania, USA
| | - J Kevin Foskett
- Department of Physiology, University of Pennsylvania, Philadelphia, Pennsylvania, USA
| | | | - Steven R Houser
- Cardiovascular Research Center, and Department of Physiology, Temple University School of Medicine, Philadelphia, Pennsylvania, USA
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Hart L, Rauch A, Carr AM, Vermeesch JR, O’Driscoll M. LETM1 haploinsufficiency causes mitochondrial defects in cells from humans with Wolf-Hirschhorn syndrome: implications for dissecting the underlying pathomechanisms in this condition. Dis Model Mech 2014; 7:535-45. [PMID: 24626991 PMCID: PMC4007405 DOI: 10.1242/dmm.014464] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Accepted: 03/03/2014] [Indexed: 12/14/2022] Open
Abstract
Wolf-Hirschhorn syndrome (WHS) represents an archetypical example of a contiguous gene deletion disorder - a condition comprising a complex set of developmental phenotypes with a multigenic origin. Epileptic seizures, intellectual disability, growth restriction, motor delay and hypotonia are major co-morbidities in WHS. Haploinsufficiency of LETM1, which encodes a mitochondrial inner-membrane protein functioning in ion transport, has been proposed as an underlying pathomechanism, principally for seizures but also for other core features of WHS, including growth and motor delay. Growing evidence derived from several model organisms suggests that reduced LETM1 expression is associated with some element of mitochondrial dysfunction. Surprisingly, LETM1-dependent mitochondrial functional deficits have not previously been described in cells from individuals with WHS. Here, using a unique panel of WHS-patient-derived cell lines with deletions of differing sizes, incorporating LETM1 or not, we show, for the first time, that LETM1 expression is reduced in mitochondria isolated from WHS-patient cells. Furthermore, we show that this is associated with distinct mitochondrial phenotypes, including altered intracellular [Ca(2+)] levels, dysfunctional mitochondrial transition-pore opening, hyperpolarization and superoxide leakage from resting mitochondria. Interestingly, we find that these phenotypes segregate with seizures in our WHS cohort. Our findings identify novel cellular phenotypes in WHS attributable to a 50% reduction in LETM1 expression level; these phenotypes could underlie and/or contribute to some of the core clinical features of this condition.
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Affiliation(s)
- Lesley Hart
- Human DNA Damage Response Disorders Group, Genome Damage and Stability Centre, School of Life Sciences, University of Sussex, Brighton, BN1 9RQ, UK
- DNA Replication and Cell Cycle Group, Genome Damage and Stability Centre, School of Life Sciences, University of Sussex, Brighton, BN1 9RQ, UK
| | - Anita Rauch
- University of Zurich, Institute of Medical Genetics, Wagistrasse 12, CH-8952 Schlieren, Switzerland
| | - Antony M. Carr
- DNA Replication and Cell Cycle Group, Genome Damage and Stability Centre, School of Life Sciences, University of Sussex, Brighton, BN1 9RQ, UK
| | - Joris R. Vermeesch
- Center for Human Genetics, UZ Leuven, Gasthuisberg, Herestraat 49, B-3000 Leuven, Belgium
| | - Mark O’Driscoll
- Human DNA Damage Response Disorders Group, Genome Damage and Stability Centre, School of Life Sciences, University of Sussex, Brighton, BN1 9RQ, UK
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Martínez-Quintana E, Rodríguez-González F. Clinical features in adult patient with Wolf-Hirschhorn syndrome. Morphologie 2014; 98:86-9. [PMID: 24656633 DOI: 10.1016/j.morpho.2014.02.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2013] [Accepted: 02/12/2014] [Indexed: 11/18/2022]
Abstract
The Wolf-Hirschhorn syndrome (WHS) encompasses deletions at the distal part of the short arm of one chromosome 4 (4p16 region). Clinical signs frequently include a typical facial appearance, mental retardation, intrauterine and postnatal growth retardation, hypotonia with decreased muscle bulk and seizures besides congenital heart malformations, midline defects, urinary tract malformations and brain, hearing and ophthalmologic malformations. Pathogenesis of WHS is multigenic and many factors are involved in prediction of prognosis such as extent of deletion, the occurrence of severe chromosome anomalies, the severe of seizures, the existence of serious internal, mainly cardiac, abnormalities and the degree of mental retardation. The phenotype of adult with WHS is in general similar to that of childhood being facial dysmorphism, growth retardation and mental retardation the rule in both adults and children. Avoid long-term complications and provide rehabilitation programs and genetic counseling may be essential in these patients.
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MESH Headings
- Adolescent
- Chromosome Deletion
- Chromosomes, Human, Pair 4/genetics
- Chromosomes, Human, Pair 4/ultrastructure
- Chromosomes, Human, Pair 8/genetics
- Chromosomes, Human, Pair 8/ultrastructure
- Double Outlet Right Ventricle/genetics
- Epilepsy, Generalized/genetics
- Facies
- Female
- Hallux Valgus/genetics
- Humans
- In Situ Hybridization, Fluorescence
- Intellectual Disability/genetics
- Kyphosis/genetics
- Male
- Phenotype
- Translocation, Genetic
- Wolf-Hirschhorn Syndrome/genetics
- Wolf-Hirschhorn Syndrome/pathology
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Affiliation(s)
- E Martínez-Quintana
- Cardiology Service, Insular-Materno Infantil University Hospital, Complejo Hospitalario Universitario Insular-Materno Infantil, Avd. Marítima del Sur s/n, 35016 Las Palmas de Gran Canaria, Spain.
| | - F Rodríguez-González
- Ophtalmology Service, Dr. Negrín University Hospital of Gran Canaria, Las Palmas de Gran Canaria, Spain
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Shimizu K, Wakui K, Kosho T, Okamoto N, Mizuno S, Itomi K, Hattori S, Nishio K, Samura O, Kobayashi Y, Kako Y, Arai T, Tsutomu OI, Kawame H, Narumi Y, Ohashi H, Fukushima Y. Microarray and FISH-based genotype-phenotype analysis of 22 Japanese patients with Wolf-Hirschhorn syndrome. Am J Med Genet A 2013; 164A:597-609. [PMID: 24357569 DOI: 10.1002/ajmg.a.36308] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Accepted: 09/30/2013] [Indexed: 01/17/2023]
Abstract
Wolf-Hirschhorn syndrome (WHS) is a contiguous gene deletion syndrome of the distal 4p chromosome, characterized by craniofacial features, growth impairment, intellectual disability, and seizures. Although genotype-phenotype correlation studies have previously been published, several important issues remain to be elucidated including seizure severity. We present detailed clinical and molecular-cytogenetic findings from a microarray and fluorescence in situ hybridization (FISH)-based genotype-phenotype analysis of 22 Japanese WHS patients, the first large non-Western series. 4p deletions were terminal in 20 patients and interstitial in two, with deletion sizes ranging from 2.06 to 29.42 Mb. The new Wolf-Hirschhorn syndrome critical region (WHSCR2) was deleted in all cases, and duplication of other chromosomal regions occurred in four. Complex mosaicism was identified in two cases: two different 4p terminal deletions; a simple 4p terminal deletion and an unbalanced translocation with the same 4p breakpoint. Seizures began in infancy in 33% (2/6) of cases with small (<6 Mb) deletions and in 86% (12/14) of cases with larger deletions (>6 Mb). Status epilepticus occurred in 17% (1/6) with small deletions and in 87% (13/15) with larger deletions. Renal hypoplasia or dysplasia and structural ocular anomalies were more prevalent in those with larger deletions. A new susceptible region for seizure occurrence is suggested between 0.76 and 1.3 Mb from 4 pter, encompassing CTBP1 and CPLX1, and distal to the previously-supposed candidate gene LETM1. The usefulness of bromide therapy for seizures and additional clinical features including hypercholesterolemia are also described.
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Affiliation(s)
- Kenji Shimizu
- Department of Medical Genetics, Shinshu University School of Medicine, Matsumoto, Japan; Division of Medical Genetics, Saitama Children's Medical Center, Saitama, Japan
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Terrone G, Cappuccio G, Genesio R, Esposito A, Fiorentino V, Riccitelli M, Nitsch L, Brunetti-Pierri N, Del Giudice E. A case of 14q11.2 microdeletion with autistic features, severe obesity and facial dysmorphisms suggestive of Wolf-Hirschhorn syndrome. Am J Med Genet A 2013; 164A:190-3. [PMID: 24243641 DOI: 10.1002/ajmg.a.36200] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2013] [Accepted: 07/28/2013] [Indexed: 11/11/2022]
Abstract
We report on a 21-year old woman with intellectual disability, autistic features, severe obesity, and facial dysmorphisms suggestive of Wolf-Hirschhorn syndrome (WHS). Array-CGH analysis showed a 2.89 Mb deletion on chromosome 14q11.2 containing 47 known genes. The most interesting genes included in this deletion are CHD8, a chromodomain helicase DNA binding protein that is associated with autism spectrum disorders, and MMP14, a matrix metalloproteinase that has been linked to obesity and type 2 diabetes. This report shows that 14q11.2 microdeletions can mimic WHS and suggests that gene(s) in the deleted interval that may be responsible for a phenocopy of WHS.
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Affiliation(s)
- Gaetano Terrone
- Department of Translational Medicine (Section of Pediatrics), Federico II University, Naples, Italy
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Chen CP, Lee MJ, Chern SR, Wu PS, Su JW, Chen YT, Lee MS, Wang W. Prenatal diagnosis and molecular cytogenetic characterization of a de novo proximal interstitial deletion of chromosome 4p (4p15.2→p14). Gene 2013; 529:351-6. [PMID: 23948085 DOI: 10.1016/j.gene.2013.07.063] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2013] [Revised: 07/13/2013] [Accepted: 07/16/2013] [Indexed: 02/03/2023]
Abstract
We present prenatal diagnosis of de novo proximal interstitial deletion of chromosome 4p (4p15.2→p14) and molecular cytogenetic characterization of the deletion using uncultured amniocytes. We review the phenotypic abnormalities of previously reported patients with similar proximal interstitial 4p deletions, and we discuss the functions of the genes of RBPJ, CCKAR, STIM2, PCDH7 and ARAP2 that are deleted within this region.
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Affiliation(s)
- Chih-Ping Chen
- Department of Obstetrics and Gynecology, Mackay Memorial Hospital, Taipei, Taiwan; Department of Medical Research, Mackay Memorial Hospital, Taipei, Taiwan; Department of Biotechnology, Asia University, Taichung, Taiwan; School of Chinese Medicine, College of Chinese Medicine, China Medical University, Taichung, Taiwan; Institute of Clinical and Community Health Nursing, National Yang-Ming University, Taipei, Taiwan; Department of Obstetrics and Gynecology, School of Medicine, National Yang-Ming University, Taipei, Taiwan.
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Hanprasertpong T, Hanaoka U, Zhang X, Mori N, Inubashiri E, Kanenishi K, Yamashiro C, Tanaka H, Shiota A, Yanagihara T, Hata T. Three-dimensional sonographic features of a fetus with Wolf-Hirschhorn syndrome. J Med Ultrason (2001) 2008; 35:197-9. [PMID: 27278992 DOI: 10.1007/s10396-008-0182-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2008] [Accepted: 05/08/2008] [Indexed: 10/21/2022]
Abstract
We present a case of fetal Wolf-Hirschhorn syndrome diagnosed by conventional two-dimensional and three-dimensional ultrasonography. Conventional two-dimensional ultrasonography revealed a diaphragmatic hernia, nuchal edema, and suspected hypospadias. Three-dimensional ultrasonography clearly showed a flattening of the face, a high forehead, a broad nasal bridge continuing to the forehead, exophthalmos, and micrognathia (resembling the appearance of a Greek warrior helmet), but conventional two-dimensional ultrasonography did not depict these findings. Prenatal chromosomal analysis confirmed the diagnosis of Wolf-Hirschhorn syndrome [46XY, del(4)(p15.2)]. Here we demonstrate how three-dimensional ultrasonography provided a novel visual depiction of the facial dysmorphism, which helped substantially in prenatal counseling.
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Affiliation(s)
- Tharangrut Hanprasertpong
- Department of Perinatology and Gynecology, Kagawa University School of Medicine, 1750-1 Ikenobe, Miki, Kagawa, 761-0793, Japan
| | - Uiko Hanaoka
- Department of Perinatology and Gynecology, Kagawa University School of Medicine, 1750-1 Ikenobe, Miki, Kagawa, 761-0793, Japan
| | - Xia Zhang
- Department of Perinatology and Gynecology, Kagawa University School of Medicine, 1750-1 Ikenobe, Miki, Kagawa, 761-0793, Japan
| | - Nobuhiro Mori
- Department of Perinatology and Gynecology, Kagawa University School of Medicine, 1750-1 Ikenobe, Miki, Kagawa, 761-0793, Japan
| | - Eisuke Inubashiri
- Department of Perinatology and Gynecology, Kagawa University School of Medicine, 1750-1 Ikenobe, Miki, Kagawa, 761-0793, Japan
| | - Kenji Kanenishi
- Department of Perinatology and Gynecology, Kagawa University School of Medicine, 1750-1 Ikenobe, Miki, Kagawa, 761-0793, Japan
| | - Chizu Yamashiro
- Department of Perinatology and Gynecology, Kagawa University School of Medicine, 1750-1 Ikenobe, Miki, Kagawa, 761-0793, Japan
| | - Hirokazu Tanaka
- Department of Perinatology and Gynecology, Kagawa University School of Medicine, 1750-1 Ikenobe, Miki, Kagawa, 761-0793, Japan
| | - Atsuko Shiota
- Department of Perinatology and Gynecology, Kagawa University School of Medicine, 1750-1 Ikenobe, Miki, Kagawa, 761-0793, Japan
| | - Toshihiro Yanagihara
- Department of Perinatology and Gynecology, Kagawa University School of Medicine, 1750-1 Ikenobe, Miki, Kagawa, 761-0793, Japan
| | - Toshiyuki Hata
- Department of Perinatology and Gynecology, Kagawa University School of Medicine, 1750-1 Ikenobe, Miki, Kagawa, 761-0793, Japan.
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Iijima S, Ohzeki T. Extremely low birthweight infant with wolf-hirschhorn syndrome: a dilemma in determination of the optimal timing of delivery. Clin Med Case Rep 2008; 1:37-40. [PMID: 24179343 PMCID: PMC3785355 DOI: 10.4137/ccrep.s760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Wolf-Hirschhorn syndrome (WHS) is characterized by multiple malformations as well as mental and developmental defects resulting from the absence of a distal segment of the short arm of chromosome 4. We experienced an extremely low birthweight infant with WHS. The male infant (birthweight 934 g) was born at 31 weeks’ gestation by cesarean section due to intrauterine growth restriction and presented with the typical WHS phenotype. Chromosomal analysis showed a deletion: 46,XY,del(4)(p15.3 p16). Although the patient’s respiratory distress syndrome resolved favourably and his subsequent condition was also stable, he had unusually severe retinopathy of prematurity and periventricular leukomalacia. We suppose that these severe complications were associated with not only prematurity but also with latent structural fragility due to WHS. Herein, we discuss the prenatal detection of WHS and the optimal timing of delivery.
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Affiliation(s)
- Shigeo Iijima
- Department of Pediatrics, Hamamatsu University School of Medicine
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