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Eggermann T, Monk D, de Nanclares GP, Kagami M, Giabicani E, Riccio A, Tümer Z, Kalish JM, Tauber M, Duis J, Weksberg R, Maher ER, Begemann M, Elbracht M. Imprinting disorders. Nat Rev Dis Primers 2023; 9:33. [PMID: 37386011 DOI: 10.1038/s41572-023-00443-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 05/19/2023] [Indexed: 07/01/2023]
Abstract
Imprinting disorders (ImpDis) are congenital conditions that are characterized by disturbances of genomic imprinting. The most common individual ImpDis are Prader-Willi syndrome, Angelman syndrome and Beckwith-Wiedemann syndrome. Individual ImpDis have similar clinical features, such as growth disturbances and developmental delay, but the disorders are heterogeneous and the key clinical manifestations are often non-specific, rendering diagnosis difficult. Four types of genomic and imprinting defect (ImpDef) affecting differentially methylated regions (DMRs) can cause ImpDis. These defects affect the monoallelic and parent-of-origin-specific expression of imprinted genes. The regulation within DMRs as well as their functional consequences are mainly unknown, but functional cross-talk between imprinted genes and functional pathways has been identified, giving insight into the pathophysiology of ImpDefs. Treatment of ImpDis is symptomatic. Targeted therapies are lacking owing to the rarity of these disorders; however, personalized treatments are in development. Understanding the underlying mechanisms of ImpDis, and improving diagnosis and treatment of these disorders, requires a multidisciplinary approach with input from patient representatives.
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Affiliation(s)
- Thomas Eggermann
- Institute for Human Genetics and Genomic Medicine, Medical Faculty, RWTH Aachen University, Aachen, Germany.
| | - David Monk
- School of Biological Sciences, University of East Anglia, Norwich, UK
| | - Guiomar Perez de Nanclares
- Rare Diseases Research Group, Molecular (Epi)Genetics Laboratory, Bioaraba Research Health Institute, Araba University Hospital-Txagorritxu, Vitoria-Gasteiz, Spain
| | - Masayo Kagami
- Department of Molecular Endocrinology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Eloïse Giabicani
- Sorbonne Université, INSERM, Centre de Recherche Saint-Antoine, APHP, Hôpital Armand Trousseau, Endocrinologie Moléculaire et Pathologies d'Empreinte, Paris, France
| | - Andrea Riccio
- Department of Environmental, Biological and Pharmaceutical Sciences and Technologies, Università della Campania Luigi Vanvitelli, Caserta, Italy
- Institute of Genetics and Biophysics A. Buzzati-Traverso, CNR, Naples, Italy
| | - Zeynep Tümer
- Kennedy Center, Department of Clinical Genetics, Copenhagen University Hospital, Rigshospitalet, Copenhagen, Denmark
- Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Jennifer M Kalish
- Division of Human Genetics and Center for Childhood Cancer Research, Children's Hospital of Philadelphia and the Departments of Pediatrics and Genetics at the Perelman School of Medicine, University of Pennsylvania, Philadelphia, PA, USA
| | - Maithé Tauber
- Centre de Référence Maladies Rares PRADORT (syndrome de PRADer-Willi et autres Obésités Rares avec Troubles du comportement alimentaire), Hôpital des Enfants, CHU Toulouse, Toulouse, France
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (Infinity) INSERM UMR1291 - CNRS UMR5051 - Université Toulouse III, Toulouse, France
| | - Jessica Duis
- Department of Pediatrics, Children's Hospital Colorado, University of Colorado Anschutz Medical Campus, Aurora, CO, USA
| | - Rosanna Weksberg
- Division of Clinical and Metabolic Genetics, Department of Paediatrics and Genetics and Genome Biology Program, Research Institute, Hospital for Sick Children, Toronto, Ontario, Canada
- Institute of Medical Sciences and Department of Molecular Genetics, University of Toronto, Toronto, Canada
| | - Eamonn R Maher
- Department of Medical Genetics, University of Cambridge, Cambridge, UK
| | - Matthias Begemann
- Institute for Human Genetics and Genomic Medicine, Medical Faculty, RWTH Aachen University, Aachen, Germany
| | - Miriam Elbracht
- Institute for Human Genetics and Genomic Medicine, Medical Faculty, RWTH Aachen University, Aachen, Germany
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2
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Correia-Costa GR, Sgardioli IC, Santos APD, Araujo TKD, Secolin R, Lopes-Cendes I, Gil-da-Silva-Lopes VL, Vieira TP. Increased runs of homozygosity in the autosomal genome of Brazilian individuals with neurodevelopmental delay/intellectual disability and/or multiple congenital anomalies investigated by chromosomal microarray analysis. Genet Mol Biol 2022; 45:e20200480. [PMID: 35238326 PMCID: PMC8892458 DOI: 10.1590/1678-4685-gmb-2020-0480] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2021] [Accepted: 12/30/2021] [Indexed: 12/18/2022] Open
Abstract
Runs of homozygosity (ROH) in the human genome may be clinically relevant. The aim of this study was to report the frequency of increased ROH of the autosomal genome in individuals with neurodevelopmental delay/intellectual disability and/or multiple congenital anomalies, and to compare these data with a control group. Data consisted of calls of homozygosity from 265 patients and 289 controls. In total, 7.2% (19/265) of the patients showed multiple ROH exceeding 1% of autosomal genome, compared to 1.4% (4/289) in the control group (p=0.0006). Homozygosity ranged from 1.38% to 22.12% among patients, and from 1.53 to 2.40% in the control group. In turn, 1.9% (5/265) of patients presented ROH ≥10Mb in a single chromosome, compared to 0.3% (1/289) of individuals from the control group (p=0.0801). By excluding cases with reported consanguineous parents (15/24), the frequency of increased ROH was 3.4% (9/250) among patients and 1.7% (5/289) in the control group, considering multiple ROH exceeding 1% of the autosome genome and ROH ≥10Mb in a single chromosome together, although not statistically significant (p=0.1873). These results reinforce the importance of investigating ROH, which with complementary diagnostic tests can improve the diagnostic yield for patients with such conditions.
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Affiliation(s)
- Gabriela Roldão Correia-Costa
- Universidade de Campinas, Faculdade de Ciências Médicas, Departamento de Medicina Translacional, Campinas, SP, Brazil
| | - Ilária Cristina Sgardioli
- Universidade de Campinas, Faculdade de Ciências Médicas, Departamento de Medicina Translacional, Campinas, SP, Brazil
| | - Ana Paula Dos Santos
- Universidade de Campinas, Faculdade de Ciências Médicas, Departamento de Medicina Translacional, Campinas, SP, Brazil
| | - Tânia Kawasaki de Araujo
- Universidade de Campinas, Faculdade de Ciências Médicas, Departamento de Medicina Translacional, Campinas, SP, Brazil
| | - Rodrigo Secolin
- Universidade de Campinas, Faculdade de Ciências Médicas, Departamento de Medicina Translacional, Campinas, SP, Brazil
| | - Iscia Lopes-Cendes
- Universidade de Campinas, Faculdade de Ciências Médicas, Departamento de Medicina Translacional, Campinas, SP, Brazil
| | - Vera Lúcia Gil-da-Silva-Lopes
- Universidade de Campinas, Faculdade de Ciências Médicas, Departamento de Medicina Translacional, Campinas, SP, Brazil
| | - Társis Paiva Vieira
- Universidade de Campinas, Faculdade de Ciências Médicas, Departamento de Medicina Translacional, Campinas, SP, Brazil
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Prenatal Detection of Uniparental Disomies (UPD): Intended and Incidental Finding in the Era of Next Generation Genomics. Genes (Basel) 2020; 11:genes11121454. [PMID: 33287348 PMCID: PMC7761756 DOI: 10.3390/genes11121454] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2020] [Revised: 11/30/2020] [Accepted: 12/01/2020] [Indexed: 12/12/2022] Open
Abstract
Prenatal detection of uniparental disomy (UPD) is a methodological challenge, and a positive testing result requires comprehensive considerations on the clinical consequences as well as ethical issues. Whereas prenatal testing for UPD in families which are prone to UPD formation (e.g., in case of chromosomal variants, imprinting disorders) is often embedded in genetic counselling, the incidental identification of UPD is often more difficult to manage. With the increasing application of high-resolution test systems enabling the identification of UPD, an increase in pregnancies with incidental detection of UPD can be expected. This paper will cover the current knowledge on uniparental disomies, their clinical consequences with focus on prenatal testing, genetic aspects and predispositions, genetic counselling, as well as methods (conventional tests and high-throughput assays).
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LUO Y, SHEN M, SUN Y, QIAN Y, WANG L, YU J, HU J, JIN F, DONG M. [Genetic analysis of a fetus with multiple malformations caused by complex translocations of four chromosomes]. Zhejiang Da Xue Xue Bao Yi Xue Ban 2019; 48:397-402. [PMID: 31901043 PMCID: PMC8800750 DOI: 10.3785/j.issn.1008-9292.2019.08.08] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
OBJECTIVE To conduct genetic analysis in a fetus with complex translocation of four chromosomes. METHODS G-banded chromosome karyotype analysis, single nucleotide polymorphism array (SNP array) and fluorescence in situ hybridization (FISH) were performed in a fetus with multiple malformations. Peripheral blood chromosome karyotype and FISH were also carried out for the parents. RESULTS The fetal amniotic fluid karyotype was 46, XY, t(12; 13)(q22; q32). SNP array analysis showed that there were 20 192 kb duplication at 1q42.13q44 and 13 293 kb deletion at 15q26.1q26.3 in the fetus. The results of karyotype and SNP array were inconsistent. FISH analyses on the parental peripheral blood samples demonstrated that the mother was a cryptic 46, XX, t(1; 15)(q42.1; q26.1) translocation. The fetus had inherited 46, XY, t(12; 13)(q22; q32) from his father and der(15)t(1; 15)(q42.1; q26.1) from his mother. CONCLUSIONS The 1q42.13q44 duplication and 15q26.1q26.3 deletion may have contributed to the abnormal sonographic features of the fetus. The combination of cytogenetic, SNP array and FISH techniques was beneficial for providing an accurate genetic counseling.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Minyue DONG
- 董旻岳(1964—), 男, 博士, 主任医师, 博士生导师, 主要从事生殖遗传学研究; E-mail:
;
https://orcid.org/0000-0002-4344-7924
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Kurtas NE, Xumerle L, Leonardelli L, Delledonne M, Brusco A, Chrzanowska K, Schinzel A, Larizza D, Guerneri S, Natacci F, Bonaglia MC, Reho P, Manolakos E, Mattina T, Soli F, Provenzano A, Al-Rikabi AH, Errichiello E, Nazaryan-Petersen L, Giglio S, Tommerup N, Liehr T, Zuffardi O. Small supernumerary marker chromosomes: A legacy of trisomy rescue? Hum Mutat 2018; 40:193-200. [PMID: 30412329 DOI: 10.1002/humu.23683] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Revised: 11/07/2018] [Accepted: 11/07/2018] [Indexed: 11/11/2022]
Abstract
We studied by a whole genomic approach and trios genotyping, 12 de novo, nonrecurrent small supernumerary marker chromosomes (sSMC), detected as mosaics during pre- or postnatal diagnosis and associated with increased maternal age. Four sSMCs contained pericentromeric portions only, whereas eight had additional non-contiguous portions of the same chromosome, assembled together in a disordered fashion by repair-based mechanisms in a chromothriptic event. Maternal hetero/isodisomy was detected with a paternal origin of the sSMC in some cases, whereas in others two maternal alleles in the sSMC region and biparental haplotypes of the homologs were detected. In other cases, the homologs were biparental while the sSMC had the same haplotype of the maternally inherited chromosome. These findings strongly suggest that most sSMCs are the result of a multiple-step mechanism, initiated by maternal meiotic nondisjunction followed by postzygotic anaphase lagging of the supernumerary chromosome and its subsequent chromothripsis.
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Affiliation(s)
| | - Luciano Xumerle
- Department of Biotechnology, University of Verona, Verona, Italy
| | | | | | - Alfredo Brusco
- Department of Medical Sciences, University of Turin, Torino, Italy
| | - Krystyna Chrzanowska
- Department of Medical Genetics, The Children's Memorial Health Institute, Warsaw, Poland
| | - Albert Schinzel
- Institute of Medical Genetics, University of Zurich, Zurich, Switzerland
| | - Daniela Larizza
- Pediatrics and Adolescentology Unit, University of Pavia, Fondazione IRCCS Policlinico San Matteo, Pavia, Italy
| | - Silvana Guerneri
- Laboratory of Medical Genetics, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Federica Natacci
- Laboratory of Medical Genetics, Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milan, Italy
| | - Maria Clara Bonaglia
- Cytogenetics Laboratory, Scientific Institute, IRCCS Eugenio Medea, Bosisio Parini, Lecco, Italy
| | - Paolo Reho
- Biomedical Experimental and Clinical Sciences "Mario Serio", University of Florence, Firenze, Italy
| | | | - Teresa Mattina
- Department of Biomedical and Biotechnological Sciences, University of Catania, Catania, Italy
| | - Fiorenza Soli
- Department of Genetics, Santa Chiara Hospital, Trento, Italy
| | - Aldesia Provenzano
- Biomedical Experimental and Clinical Sciences "Mario Serio", University of Florence, Firenze, Italy.,Azienda Ospedaliero-Universitaria Meyer, Firenze, Italy
| | - Ahmed H Al-Rikabi
- Institute of Human Genetics, Jena University Hospital, Jena, Germany
| | | | | | - Sabrina Giglio
- Biomedical Experimental and Clinical Sciences "Mario Serio", University of Florence, Firenze, Italy.,Azienda Ospedaliero-Universitaria Meyer, Firenze, Italy
| | - Niels Tommerup
- Department of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Thomas Liehr
- Institute of Human Genetics, Jena University Hospital, Jena, Germany
| | - Orsetta Zuffardi
- Department of Molecular Medicine, University of Pavia, Pavia, Italy
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6
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De novo unbalanced translocations have a complex history/aetiology. Hum Genet 2018; 137:817-829. [DOI: 10.1007/s00439-018-1941-9] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2018] [Accepted: 09/24/2018] [Indexed: 12/21/2022]
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7
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An G, Lin Y, Xu LP, Huang HL, Liu SP, Yu YH, Yang F. Application of chromosomal microarray to investigate genetic causes of isolated fetal growth restriction. Mol Cytogenet 2018; 11:33. [PMID: 29991965 PMCID: PMC5987400 DOI: 10.1186/s13039-018-0382-4] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 05/13/2018] [Indexed: 12/23/2022] Open
Abstract
Background Application of chromosomal microarray analysis (CMA) to investigate the genetic characteristics of fetal growth restriction (FGR) without ultrasonic structural anomalies at 18–32 weeks. Methods This study includes singleton fetuses with the estimated fetal weight (EFW) using the formula of Hadlock C below the 10th percentile for gestational age. FGRs without structural anomalies were selected, and the ones at high risk of noninvasive prenatal testing for trisomy 13, 18 and 21 would be excluded. The cases were divided into two groups: early-onset group (< 24+ 0 weeks) and late-onset group (24–33 weeks). All patients were offered invasive prenatal testing with CMA and karyotype analysis. Results CMA detected 10 pathogenic copy number variants and 2 variant of uncertain significance case. CMA has a 5.5% (7/127) incremental yield of pathogenic chromosomal abnormalities over karyotyping. The positive detected rate was 9.6% (5/52) in early-onset group and 9.3% (7/75) in late-onset group respectively. Conclusions When FGR without structural anomaly is diagnosed before 33 weeks, an invasive prenatal procedure is strongly recommended. CMA can identify a 5.5% (7/127) incremental detection rate of pathogenic chromosomal abnormalities, which would impact clinical management for FGR.
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Affiliation(s)
- Gang An
- 1Nanfang Hospital, Southern Medical University, Guangzhou, 510515 Guangdong China.,2Fujian Provincial Key Laboratory for Prenatal diagnosis and Birth Defect, Fujian Provincial Maternity and Children's Hospital of Fujian Medical University, Fuzhou, Fujian China
| | - Yuan Lin
- 2Fujian Provincial Key Laboratory for Prenatal diagnosis and Birth Defect, Fujian Provincial Maternity and Children's Hospital of Fujian Medical University, Fuzhou, Fujian China
| | - Liang Pu Xu
- 2Fujian Provincial Key Laboratory for Prenatal diagnosis and Birth Defect, Fujian Provincial Maternity and Children's Hospital of Fujian Medical University, Fuzhou, Fujian China
| | - Hai Long Huang
- 2Fujian Provincial Key Laboratory for Prenatal diagnosis and Birth Defect, Fujian Provincial Maternity and Children's Hospital of Fujian Medical University, Fuzhou, Fujian China
| | - Si Ping Liu
- 1Nanfang Hospital, Southern Medical University, Guangzhou, 510515 Guangdong China
| | - Yan Hong Yu
- 1Nanfang Hospital, Southern Medical University, Guangzhou, 510515 Guangdong China
| | - Fang Yang
- 1Nanfang Hospital, Southern Medical University, Guangzhou, 510515 Guangdong China
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8
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Heide S, Chantot-Bastaraud S, Keren B, Harbison MD, Azzi S, Rossignol S, Michot C, Lackmy-Port Lys M, Demeer B, Heinrichs C, Newfield RS, Sarda P, Van Maldergem L, Trifard V, Giabicani E, Siffroi JP, Le Bouc Y, Netchine I, Brioude F. Chromosomal rearrangements in the 11p15 imprinted region: 17 new 11p15.5 duplications with associated phenotypes and putative functional consequences. J Med Genet 2017; 55:205-213. [PMID: 29223973 DOI: 10.1136/jmedgenet-2017-104919] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2017] [Revised: 10/11/2017] [Accepted: 11/04/2017] [Indexed: 11/04/2022]
Abstract
BACKGROUND The 11p15 region contains two clusters of imprinted genes. Opposite genetic and epigenetic anomalies of this region result in two distinct growth disturbance syndromes: Beckwith-Wiedemann (BWS) and Silver-Russell syndromes (SRS). Cytogenetic rearrangements within this region represent less than 3% of SRS and BWS cases. Among these, 11p15 duplications were infrequently reported and interpretation of their pathogenic effects is complex. OBJECTIVES To report cytogenetic and methylation analyses in a cohort of patients with SRS/BWS carrying 11p15 duplications and establish genotype/phenotype correlations. METHODS From a cohort of patients with SRS/BWS with an abnormal methylation profile (using ASMM-RTQ-PCR), we used SNP-arrays to identify and map the 11p15 duplications. We report 19 new patients with SRS (n=9) and BWS (n=10) carrying de novo or familial 11p15 duplications, which completely or partially span either both telomeric and centromeric domains or only one domain. RESULTS Large duplications involving one complete domain or both domains are associated with either SRS or BWS, depending on the parental origin of the duplication. Genotype-phenotype correlation studies of partial duplications within the telomeric domain demonstrate the prominent role of IGF2, rather than H19, in the control of growth. Furthermore, it highlights the role of CDKN1C within the centromeric domain and suggests that the expected overexpression of KCNQ1OT1 from the paternal allele (in partial paternal duplications, excluding CDKN1C) does not affect the expression of CDKN1C. CONCLUSIONS The phenotype associated with 11p15 duplications depends on the size, genetic content, parental inheritance and imprinting status. Identification of these rare duplications is crucial for genetic counselling.
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Affiliation(s)
- Solveig Heide
- Département de Génétique, APHP, Hôpital Armand-Trousseau, UF de Génétique Chromosomique, Paris, France
| | - Sandra Chantot-Bastaraud
- Département de Génétique, APHP, Hôpital Armand-Trousseau, UF de Génétique Chromosomique, Paris, France
| | - Boris Keren
- Département de Génétique, APHP, Groupe Hospitalier Pitié-Salpêtrière, Paris, France
| | - Madeleine D Harbison
- Department of Pediatrics, Icahn School of Medicine at Mount Sinai, New York, USA
| | - Salah Azzi
- Nuclear Dynamics ISPG, Babraham Institute, Cambridge, UK
| | - Sylvie Rossignol
- Service de Pédiatrie 1, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.,Laboratoire de Génétique Médicale, INSERM U1112, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg, Strasbourg, France
| | - Caroline Michot
- Department of Genetics, INSERM UMR 1163, Université Paris Descartes-Sorbonne Paris Cité, Institut Imagine, Hôpital Necker Enfants Malades (AP-HP), Paris, France
| | - Marilyn Lackmy-Port Lys
- Unité de Génétique Clinique, Centre de Compétences Maladies Rares Anomalies du développement, Centre Hospitalier Universitaire Pointe-a-Pitre Abymes, Pointe-a-Pitre, France
| | - Bénédicte Demeer
- Service de Génétique Clinique et Oncogénétique, CLAD Nord de France, CHU Amiens-Picardie, Amiens, France
| | - Claudine Heinrichs
- Service d'Endocrinologie Pédiatrique, Queen Fabiola Children's University Hospital, Université Libre de Bruxelles (ULB), Brussels, Belgium
| | - Ron S Newfield
- Department of Pediatrics, Division of Pediatric Endocrinology, University of California San Diego, San Diego, CA, USA.,Rady Children's Hospital San Diego, San Diego, CA, USA
| | - Pierre Sarda
- Service de Génétique Médicale, CHU de Montpellier, Montpellier, France
| | - Lionel Van Maldergem
- CHU, Centre de Génétique Humaine Besançon, Université de Franche-Comté, Besançon, France
| | - Véronique Trifard
- Service de Pédiatrie, CH de La Roche sur Yon, La Roche sur Yon, France
| | - Eloise Giabicani
- AP-HP, Hôpitaux Universitaires Paris Est, Hôpital des Enfants Armand Trousseau, Service d'Explorations Fonctionnelles Endocriniennes, Paris, France.,INSERM UMR_S938, Centre de Recherche Saint Antoine, Paris, France.,Sorbonne Universites, UPMC Univ Paris 06, Paris, France
| | - Jean-Pierre Siffroi
- Département de Génétique, APHP, Hôpital Armand-Trousseau, UF de Génétique Chromosomique, Paris, France
| | - Yves Le Bouc
- AP-HP, Hôpitaux Universitaires Paris Est, Hôpital des Enfants Armand Trousseau, Service d'Explorations Fonctionnelles Endocriniennes, Paris, France.,INSERM UMR_S938, Centre de Recherche Saint Antoine, Paris, France.,Sorbonne Universites, UPMC Univ Paris 06, Paris, France
| | - Irène Netchine
- AP-HP, Hôpitaux Universitaires Paris Est, Hôpital des Enfants Armand Trousseau, Service d'Explorations Fonctionnelles Endocriniennes, Paris, France.,INSERM UMR_S938, Centre de Recherche Saint Antoine, Paris, France.,Sorbonne Universites, UPMC Univ Paris 06, Paris, France
| | - Frédéric Brioude
- AP-HP, Hôpitaux Universitaires Paris Est, Hôpital des Enfants Armand Trousseau, Service d'Explorations Fonctionnelles Endocriniennes, Paris, France.,INSERM UMR_S938, Centre de Recherche Saint Antoine, Paris, France.,Sorbonne Universites, UPMC Univ Paris 06, Paris, France
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9
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Su J, Wang J, Fan X, Fu C, Zhang S, Zhang Y, Qin Z, Li H, Luo J, Li C, Jiang T, Shen Y. Mosaic UPD(7q)mat in a patient with silver Russell syndrome. Mol Cytogenet 2017; 10:36. [PMID: 29075327 PMCID: PMC5645907 DOI: 10.1186/s13039-017-0337-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Accepted: 10/12/2017] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Silver-Russell syndrome (SRS) is one of the imprinting disorders characterized by prenatal and postnatal growth restriction, relative macrocephaly, body asymmetry and characteristic facial features. ~ 10% of SRS cases are known to be associated with maternal uniparental disomy of chromosome 7 (UPD(7)mat). Mosaic maternal segmental UPD of 7q (UPD(7q)mat) is very rare, had only been described in one case before. CASE PRESENTATION We reported a second case of mosaic segmental UPD involving 7q. The patient presented with dysmorphic features including thin and short stature, triangular face, moderate protruding forehead, relative macrocephaly, fifth toe clinodactyly and irregular teeth, meeting the clinical diagnosed criteria of SRS. This case indicated that ~ 80% of mosaic UPD(7q)mat lead to the manifestation of main phenotypes of Silver-Russell syndrome. CONCLUSIONS Our case support the notion that there are genes control postnatal growth on long arm of chromosome 7 and indicate that ~ 80% of UPD(7q)mat mosaicism level was contributed to the SRS phenotype.
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Affiliation(s)
- Jiasun Su
- Department of Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Guangxi Birth Defects Prevention and Control Institute, No 59, Xiangzhu Road, Nanning, China
| | - Jin Wang
- Department of Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Guangxi Birth Defects Prevention and Control Institute, No 59, Xiangzhu Road, Nanning, China
| | - Xin Fan
- Department of Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Guangxi Birth Defects Prevention and Control Institute, No 59, Xiangzhu Road, Nanning, China
| | - Chunyun Fu
- Department of Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Guangxi Birth Defects Prevention and Control Institute, No 59, Xiangzhu Road, Nanning, China
| | - ShuJie Zhang
- Department of Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Guangxi Birth Defects Prevention and Control Institute, No 59, Xiangzhu Road, Nanning, China
| | - Yue Zhang
- Department of Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Guangxi Birth Defects Prevention and Control Institute, No 59, Xiangzhu Road, Nanning, China
| | - Zailong Qin
- Department of Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Guangxi Birth Defects Prevention and Control Institute, No 59, Xiangzhu Road, Nanning, China
| | - Hongdou Li
- Department of Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Guangxi Birth Defects Prevention and Control Institute, No 59, Xiangzhu Road, Nanning, China
| | - Jingsi Luo
- Department of Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Guangxi Birth Defects Prevention and Control Institute, No 59, Xiangzhu Road, Nanning, China
| | - Chuan Li
- Department of Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Guangxi Birth Defects Prevention and Control Institute, No 59, Xiangzhu Road, Nanning, China
| | - Tingting Jiang
- Department of Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Guangxi Birth Defects Prevention and Control Institute, No 59, Xiangzhu Road, Nanning, China
| | - Yiping Shen
- Department of Genetic and Metabolic Central Laboratory, Guangxi Maternal and Child Health Hospital, Guangxi Birth Defects Prevention and Control Institute, No 59, Xiangzhu Road, Nanning, China.,Department of Laboratory Medicine, Boston Children's Hospital, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115 USA
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