1
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Mégarbané A, Mehawej C, Mahfoud D, Chouery E, Devriendt K, Hijazi M, Ryu SW, Kim J, McNeill A. How many phenotypes for the FBXO11 related disease? Report on a new patient with a tricho-rhino-phalangeal like phenotype. Eur J Med Genet 2024; 69:104944. [PMID: 38679370 DOI: 10.1016/j.ejmg.2024.104944] [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: 08/05/2023] [Revised: 03/11/2024] [Accepted: 04/25/2024] [Indexed: 05/01/2024]
Abstract
Here we report the case of a young boy with developmental delay, thin sparse hair, early closure of the anterior fontanel, bilateral choanal atresia, brachyturicephaly; and dysmorphic features closely resembling those seen in trichorhinophalangeal syndrome (TRPS). These features include sparse hair, sparse lateral eyebrows, a bulbous pear shaped nose, a long philtrum, thin lips, small/hypoplastic nails, pes planovalgus; bilateral cone-shaped epiphyses at the proximal 5th phalanx, slender long bones, coxa valga, mild scoliosis, and delayed bone age. Given that TRPS had been excluded by a thorough genetic analysis, whole exome sequencing was performed and a heterozygous likely pathogenic variant was identified in the FBXO11 gene (NM_001190274.2: c.1781A > G; p. His594Arg), confirming the diagnosis of the newly individualized IDDFBA syndrome: Intellectual Developmental Disorder, dysmorphic Facies, and Behavioral Abnormalities (OMIM# 618,089). Our findings further delineate the clinical spectrum linked to FBXO11 and highlight the importance of investigating further cases with mutations in this gene to establish a potential genotype-phenotype correlation.
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Affiliation(s)
- Andre Mégarbané
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Beirut, Lebanon; Institut Jerome Lejeune, Paris, France.
| | - Cybel Mehawej
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Beirut, Lebanon.
| | - Daniel Mahfoud
- Department of Radiology, Medical Center - Rizk Hospital, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Lebanon.
| | - Eliane Chouery
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Beirut, Lebanon.
| | - Koenraad Devriendt
- Center for Human Genetics, University of Leuven (KU) and University Hospitals Leuven (UZ), Louvain, Belgium.
| | - Mariam Hijazi
- Department of Human Genetics, Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Beirut, Lebanon.
| | | | - JiHye Kim
- 3 Billion Inc., Seoul, Republic of Korea.
| | - Alisdair McNeill
- Sheffield Institute for Translational Neuroscience, The University of Sheffield, Sheffield, UK.
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2
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Struys I, Velázquez C, Devriendt K, Godderis L, Segers H, Thienpont B, van Boxtel R, Van Calsteren K, Voet T, Wolters V, Lenaerts L, Amant F. Evaluating offspring Genomic and Epigenomic alterations after prenatal exposure to Cancer treatment In Pregnancy (GE-CIP): a multicentric observational study. BMJ Open 2024; 14:e081833. [PMID: 38548357 PMCID: PMC10982724 DOI: 10.1136/bmjopen-2023-081833] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2023] [Accepted: 03/05/2024] [Indexed: 04/02/2024] Open
Abstract
INTRODUCTION Around 1 in 1000-2000 pregnancies are affected by a cancer diagnosis. Previous studies have shown that chemotherapy during pregnancy has reassuring cognitive and cardiac neonatal outcomes, and hence has been proposed as standard of care. However, although these children perform within normal ranges for their age, subtle differences have been identified. Given that chemotherapeutic compounds can cross the placenta, the possibility that prenatal chemotherapy exposure mutates the offspring's genome and/or epigenome, with potential deleterious effects later in life, urges to be investigated. METHODS AND ANALYSES This multicentric observational study aims to collect cord blood, meconium and neonatal buccal cells at birth, as well as peripheral blood, buccal cells and urine from infants when 6, 18 and/or 36 months of age. Using bulk and single-cell approaches, we will compare samples from chemotherapy-treated pregnant patients with cancer, pregnant patients with cancer not treated with chemotherapy and healthy pregnant women. Potential chemotherapy-related newborn genomic and/or epigenomic alterations, such as single nucleotide variants, copy number variants and DNA-methylation alterations, will be identified in mononuclear and epithelial cells, isolated from blood, buccal swabs and urine. DNA from maternal peripheral blood and paternal buccal cells will be used to determine de novo somatic mutations in the neonatal blood and epithelial cells. Additionally, the accumulated exposure of the fetus, and biological effective dose of alkylating agents, will be assessed in meconium and cord blood via mass spectrometry approaches. ETHICS AND DISSEMINATION The Ethics Committee Research of UZ/KU Leuven (EC Research) and the Medical Ethical Review Committee of University Medical Center Amsterdam have approved the study. Results of this study will be disseminated via presentations at (inter)national conferences, through peer-reviewed, open-access publications, via social media platforms aimed to inform patients and healthcare workers, and through the website of the International Network on Cancer, Infertility and Pregnancy (www.cancerinpregnancy.org).
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Affiliation(s)
- Ilana Struys
- Department of Oncology, KU Leuven, Leuven, Flanders, Belgium
| | | | - Koenraad Devriendt
- Department of Human Genetics, University Hospital Leuven, Leuven, Belgium
| | - Lode Godderis
- Department of Public Health and Primary Care, KU Leuven, Leuven, Flanders, Belgium
- External Service for Prevention and Protection at Work, Heverlee, Belgium
| | - Heidi Segers
- Department of Paediatric Oncology, University Hospital Leuven, Leuven, Belgium
| | | | - Ruben van Boxtel
- Princess Maxima Center for Pediatric Oncology, Utrecht, Netherlands
| | - Kristel Van Calsteren
- Department of Obstetrics and Gynecology, University Hospital Leuven, Leuven, Belgium
| | - Thierry Voet
- Department of Human Genetics, KU Leuven, Leuven, Flanders, Belgium
- Institute for Single Cell Omics (LISCO), KU Leuven, Leuven, Flanders, Belgium
| | - Vera Wolters
- Gynecologic Oncology, Netherlands Cancer Institute, Amsterdam, Netherlands
| | | | - Frederic Amant
- Department of Oncology, KU Leuven, Leuven, Flanders, Belgium
- Department of Obstetrics and Gynecology, University Hospital Leuven, Leuven, Belgium
- Gynecologic Oncology, Netherlands Cancer Institute, Amsterdam, Netherlands
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3
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Parijs I, Brison N, Vancoillie L, Baetens M, Blaumeiser B, Boulanger S, Désir J, Dimitrov B, Fieremans N, Janssens K, Janssens S, Marichal A, Menten B, Meunier C, Van Berkel K, Van Den Bogaert A, Devriendt K, Van Den Bogaert K, Vermeesch JR. Population screening for 15q11-q13 duplications: corroboration of the difference in impact between maternally and paternally inherited alleles. Eur J Hum Genet 2024; 32:31-36. [PMID: 37029316 PMCID: PMC10772068 DOI: 10.1038/s41431-023-01336-6] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 12/21/2022] [Revised: 02/28/2023] [Accepted: 03/09/2023] [Indexed: 04/09/2023] Open
Abstract
Maternally inherited 15q11-q13 duplications are generally found to cause more severe neurodevelopmental anomalies compared to paternally inherited duplications. However, this assessment is mainly inferred from the study of patient populations, causing an ascertainment bias towards patients at the more severe end of the phenotypic spectrum. Here, we analyze the low coverage genome-wide cell-free DNA sequencing data obtained from pregnant women during non-invasive prenatal screening (NIPS). We detect 23 15q11-q13 duplications in 333,187 pregnant women (0.0069%), with an approximately equal distribution between maternal and paternal duplications. Maternally inherited duplications are always associated with a clinical phenotype (ranging from learning difficulties to intellectual impairment, epilepsy and psychiatric disorders), while paternal duplications are normal or associated with milder phenotypes (mild learning difficulties and dyslexia). This data corroborates the difference in impact between paternally and maternally inherited 15q11-q13 duplications, contributing to the improvement of genetic counselling. We recommend reporting 15q11-q13 duplications identified during genome-wide NIPS with appropriate genetic counselling for these pregnant women in the interest of both mothers and future children.
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Affiliation(s)
- Ilse Parijs
- Center for Human Genetics, University Hospitals Leuven-KU Leuven, Leuven, Belgium
| | - Nathalie Brison
- Center for Human Genetics, University Hospitals Leuven-KU Leuven, Leuven, Belgium
| | - Leen Vancoillie
- Center for Human Genetics, University Hospitals Leuven-KU Leuven, Leuven, Belgium
| | - Machteld Baetens
- Center of Medical Genetics, University Hospital Ghent, Ghent, Belgium
| | - Bettina Blaumeiser
- Center of Medical Genetics, University and University Hospital Antwerp, Antwerp, Belgium
| | - Sébastien Boulanger
- Center for Medical Genetics, Institut de Pathologie et de Génétique Gosselies, Charleroi, Belgium
| | - Julie Désir
- Center for Medical Genetics, Institut de Pathologie et de Génétique Gosselies, Charleroi, Belgium
| | - Boyan Dimitrov
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Clinical Sciences, research group Reproduction and Genetics, Center for Medical Genetics, Brussels, Belgium
| | - Nathalie Fieremans
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Clinical Sciences, research group Reproduction and Genetics, Center for Medical Genetics, Brussels, Belgium
| | - Katrien Janssens
- Center of Medical Genetics, University and University Hospital Antwerp, Antwerp, Belgium
| | - Sandra Janssens
- Center of Medical Genetics, University Hospital Ghent, Ghent, Belgium
| | - Axel Marichal
- Center for Medical Genetics, Institut de Pathologie et de Génétique Gosselies, Charleroi, Belgium
| | - Björn Menten
- Center of Medical Genetics, University Hospital Ghent, Ghent, Belgium
| | - Colombine Meunier
- Center for Medical Genetics, Institut de Pathologie et de Génétique Gosselies, Charleroi, Belgium
| | - Kim Van Berkel
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Clinical Sciences, research group Reproduction and Genetics, Center for Medical Genetics, Brussels, Belgium
| | - Ann Van Den Bogaert
- Vrije Universiteit Brussel (VUB), Universitair Ziekenhuis Brussel (UZ Brussel), Clinical Sciences, research group Reproduction and Genetics, Center for Medical Genetics, Brussels, Belgium
| | - Koenraad Devriendt
- Center for Human Genetics, University Hospitals Leuven-KU Leuven, Leuven, Belgium
| | - Kris Van Den Bogaert
- Center for Human Genetics, University Hospitals Leuven-KU Leuven, Leuven, Belgium
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Mbayabo G, Ngole M, Lumbala PK, Lumaka A, Race V, Matthijs G, Mikobi TM, Devriendt K, Van Geet C, Lukusa PT. Clinical and biological profile of Sickle Cell Anemia children in a rural area in Central Africa. Hematology 2023; 28:2193770. [PMID: 37014748 DOI: 10.1080/16078454.2023.2193770] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/05/2023] Open
Abstract
BACKGROUND Sickle Cell Anemia (SCA) is the most common genetic disease worldwide caused by a single mutation in the gene HBB. The disease severity is very variable and depends on many factors. We evaluated the clinical and biological profile of sickle cell anemia children in rural Central Africa. METHODS This cross-sectional study was conducted in the Hôpital Saint Luc de Kisantu, located 120 km away from Kinshasa-DR Congo in an area of 35 km around Kisantu with a population of roughly 80 000 individuals. We included SCA patients aged 6 months to 18 years. We collected clinical and hematological data. The SCA scoring system proposed by Adegoke et al. in 2013 was applied to determine the disease severity. We searched for factors associated to the disease severity. RESULTS This study included 136 patients, 66 males and 70 females (sex-ratio M/F 0.94). The mean severity score was 8.21 ± 5.30 (ranges 0-23). Fifty-nine (43.4%) children had mild disease, 62 (45.6%) moderate and 15 (11%) severe disease. Girls had higher levels of HbF than boys (p = 0.003). An inverse correlation was observed between fetal hemoglobin and the disease severity (p = 0.005, r -0.239, IC95% -6.139; -1.469). Some factors such age influence the occurrence of certain chronic complications such as avascular bone necrosis. CONCLUSION In conclusion, the disease severity of SCA depends on multiple factors. In this study, fetal hemoglobin was the main modulator of the disease severity. These data may also serve as a baseline to initiate HU treatment in this setting.
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Affiliation(s)
- Gloire Mbayabo
- Department of Pediatrics, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
- Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium
- Center of Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Mamy Ngole
- Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium
- Department of Clinical Biology, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
- Center of Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Paul Kabuyi Lumbala
- Department of Pediatrics, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
- Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium
- Center of Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Aimé Lumaka
- Department of Pediatrics, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
- Center of Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
- Service de Génétique, CHU de Liège, Liège, Belgium
| | - Valerie Race
- Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium
| | - Gert Matthijs
- Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium
| | - Tite Minga Mikobi
- Center of Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
- Département des sciences de base, Laboratory of biochemistry and molecular biology; Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Koenraad Devriendt
- Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium
| | - Chris Van Geet
- Department of Cardiovascular Sciences and Pediatrics (Hemato-oncology), KU Leuven and University Hospitals Leuven, Leuven, Belgium
| | - Prosper Tshilobo Lukusa
- Department of Pediatrics, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
- Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium
- Center of Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
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5
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Peluso F, Caraffi SG, Contrò G, Valeri L, Napoli M, Carboni G, Seth A, Zuntini R, Coccia E, Astrea G, Bisgaard AM, Ivanovski I, Maitz S, Brischoux-Boucher E, Carter MT, Dentici ML, Devriendt K, Bellini M, Digilio MC, Doja A, Dyment DA, Farholt S, Ferreira CR, Wolfe LA, Gahl WA, Gnazzo M, Goel H, Grønborg SW, Hammer T, Iughetti L, Kleefstra T, Koolen DA, Lepri FR, Lemire G, Louro P, McCullagh G, Madeo SF, Milone A, Milone R, Nielsen JEK, Novelli A, Ockeloen CW, Pascarella R, Pippucci T, Ricca I, Robertson SP, Sawyer S, Falkenberg Smeland M, Stegmann S, Stumpel CT, Goel A, Taylor JM, Barbuti D, Soresina A, Bedeschi MF, Battini R, Cavalli A, Fusco C, Iascone M, Van Maldergem L, Venkateswaran S, Zuffardi O, Vergano S, Garavelli L, Bayat A. Deep phenotyping of the neuroimaging and skeletal features in KBG syndrome: a study of 53 patients and review of the literature. J Med Genet 2023; 60:1224-1234. [PMID: 37586838 DOI: 10.1136/jmg-2023-109141] [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: 01/03/2023] [Accepted: 06/30/2023] [Indexed: 08/18/2023]
Abstract
BACKGROUND KBG syndrome is caused by haploinsufficiency of ANKRD11 and is characterised by macrodontia of upper central incisors, distinctive facial features, short stature, skeletal anomalies, developmental delay, brain malformations and seizures. The central nervous system (CNS) and skeletal features remain poorly defined. METHODS CNS and/or skeletal imaging were collected from molecularly confirmed individuals with KBG syndrome through an international network. We evaluated the original imaging and compared our results with data in the literature. RESULTS We identified 53 individuals, 44 with CNS and 40 with skeletal imaging. Common CNS findings included incomplete hippocampal inversion and posterior fossa malformations; these were significantly more common than previously reported (63.4% and 65.9% vs 1.1% and 24.7%, respectively). Additional features included patulous internal auditory canal, never described before in KBG syndrome, and the recurrence of ventriculomegaly, encephalic cysts, empty sella and low-lying conus medullaris. We found no correlation between these structural anomalies and epilepsy or intellectual disability. Prevalent skeletal findings comprised abnormalities of the spine including scoliosis, coccygeal anomalies and cervical ribs. Hand X-rays revealed frequent abnormalities of carpal bone morphology and maturation, including a greater delay in ossification compared with metacarpal/phalanx bones. CONCLUSION This cohort enabled us to describe the prevalence of very heterogeneous neuroradiological and skeletal anomalies in KBG syndrome. Knowledge of the spectrum of such anomalies will aid diagnostic accuracy, improve patient care and provide a reference for future research on the effects of ANKRD11 variants in skeletal and brain development.
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Affiliation(s)
- Francesca Peluso
- Medical Genetics Unit, Maternal and Child Health Department, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Emilia-Romagna, Italy
| | - Stefano G Caraffi
- Medical Genetics Unit, Maternal and Child Health Department, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Emilia-Romagna, Italy
| | - Gianluca Contrò
- Medical Genetics Unit, Maternal and Child Health Department, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Emilia-Romagna, Italy
| | - Lara Valeri
- Medical Genetics Unit, Maternal and Child Health Department, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Emilia-Romagna, Italy
- Department of Pediatrics, University of Modena and Reggio Emilia Faculty of Medicine and Surgery, Modena, Emilia-Romagna, Italy
| | - Manuela Napoli
- Neuroradiology Unit, Azienda USL - IRCCS di Reggio Emilia, Reggio Emilia, Emilia-Romagna, Italy
| | - Giorgia Carboni
- Radiology Unit, Azienda USL - IRCCS di Reggio Emilia, Reggio Emilia, Emilia-Romagna, Italy
| | - Alka Seth
- Radiology, Rigshospitalet, Kobenhavn, Denmark
| | - Roberta Zuntini
- Medical Genetics Unit, Maternal and Child Health Department, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Emilia-Romagna, Italy
| | - Emanuele Coccia
- Medical Genetics Unit, Maternal and Child Health Department, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Emilia-Romagna, Italy
| | - Guja Astrea
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Calambrone, Toscana, Italy
| | - Anne-Marie Bisgaard
- Center for Rare Diseases, Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital, Kobenhavn, Denmark
| | - Ivan Ivanovski
- Institute of Medical Genetics, University of Zurich, Zurich, Switzerland
| | - Silvia Maitz
- Service of Medical Genetics, IOSI, EOC, Lugano, Switzerland
| | | | - Melissa T Carter
- The University of Newcastle, Callaghan, New South Wales, Australia
| | - Maria Lisa Dentici
- Department of Clinical Genetics, Copenhagen University Hospital, Kobenhavn, Denmark
| | - Koenraad Devriendt
- Department for Epilepsy Genetics and Personalized Medicine, Danish Epilepsy Centre, Dianalund, Denmark
| | - Melissa Bellini
- Department of Pediatrics, University of Modena and Reggio Emilia, Modena, Italy
| | - Maria Cristina Digilio
- Department of Medical and Surgical Sciences of the Mother, Children and Adults, University of Modena and Reggio Emilia, Modena, Italy
| | - Asif Doja
- The University of Newcastle, Callaghan, New South Wales, Australia
| | - David A Dyment
- The University of Newcastle, Callaghan, New South Wales, Australia
| | - Stense Farholt
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Gelderland, Netherlands
| | - Carlos R Ferreira
- Medical Genetics Unit, Centro Hospitalar e Universitário de Coimbra EPE, Coimbra, Coimbra, Portugal
| | - Lynne A Wolfe
- Medical Genetics Unit, Centro Hospitalar e Universitário de Coimbra EPE, Coimbra, Coimbra, Portugal
| | - William A Gahl
- National Human Genome Research Institute, Bethesda, Maryland, USA
| | - Maria Gnazzo
- Translational Cytogenomics Research Unit, Laboratory of Medical Genetics, Bambino Gesu Pediatric Hospital, Roma, Lazio, Italy
| | - Himanshu Goel
- Hunter Genetics, John Hunter Hospital, New Lambton Heights, New South Wales, Australia
- The University of Newcastle, Callaghan, New South Wales, Australia
| | - Sabine Weller Grønborg
- Center for Rare Diseases, Department of Pediatrics and Adolescent Medicine, Copenhagen University Hospital, Kobenhavn, Denmark
- Department of Clinical Genetics, Copenhagen University Hospital, Kobenhavn, Denmark
| | - Trine Hammer
- Department of Clinical Genetics, Copenhagen University Hospital, Kobenhavn, Denmark
- Department for Epilepsy Genetics and Personalized Medicine, Danish Epilepsy Centre, Dianalund, Denmark
| | - Lorenzo Iughetti
- Department of Pediatrics, University of Modena and Reggio Emilia, Modena, Italy
- Department of Medical and Surgical Sciences of the Mother, Children and Adults, University of Modena and Reggio Emilia, Modena, Italy
| | - Tjitske Kleefstra
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Gelderland, Netherlands
| | - David A Koolen
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Gelderland, Netherlands
| | - Francesca Romana Lepri
- Translational Cytogenomics Research Unit, Laboratory of Medical Genetics, Bambino Gesu Pediatric Hospital, Roma, Lazio, Italy
| | - Gabrielle Lemire
- Department of Genetics, Children's Hospital of Eastern Ontario (CHEO), Ottawa, Ontario, Canada
| | - Pedro Louro
- Medical Genetics Unit, Centro Hospitalar e Universitário de Coimbra EPE, Coimbra, Coimbra, Portugal
| | - Gary McCullagh
- Royal Manchester Children's Hospital and University of Manchester, Royal Manchester Children's Hospital, Manchester, Manchester, UK
| | - Simona F Madeo
- Department of Medical and Surgical Sciences of the Mother, Children and Adults, University of Modena and Reggio Emilia, Modena, Italy
| | - Annarita Milone
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Calambrone, Toscana, Italy
| | - Roberta Milone
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Calambrone, Toscana, Italy
| | - Jens Erik Klint Nielsen
- Department of Pediatrics, Zealand University Hospital Roskilde, Roskilde, Sjaelland, Denmark
| | - Antonio Novelli
- Translational Cytogenomics Research Unit, Laboratory of Medical Genetics, Bambino Gesu Pediatric Hospital, Roma, Lazio, Italy
| | - Charlotte W Ockeloen
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, Gelderland, Netherlands
| | - Rosario Pascarella
- Neuroradiology Unit, Azienda USL - IRCCS di Reggio Emilia, Reggio Emilia, Emilia-Romagna, Italy
| | - Tommaso Pippucci
- U.O. Genetica Medica, IRCCS Azienda Ospedaliero-Universitaria di Bologna Policlinico S Orsola, Bologna, Emilia-Romagna, Italy
| | - Ivana Ricca
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Calambrone, Toscana, Italy
| | - Stephen P Robertson
- Department of Women's and Children's Health, Dunedin School of Medicine, University of Otago, Dunedin, New Zealand
| | - Sarah Sawyer
- Department of Genetics, Children's Hospital of Eastern Ontario (CHEO), Ottawa, Ontario, Canada
| | | | - Sander Stegmann
- Department of Clinical Genetics and School for Oncology and Developmental Biology, Maastricht University Medical Centre+, Maastricht, Limburg, Netherlands
| | - Constanze T Stumpel
- Department of Clinical Genetics and School for Oncology and Developmental Biology, Maastricht University Medical Centre+, Maastricht, Limburg, Netherlands
| | - Amy Goel
- University of Newcastle, Callaghan, The University of Newcastle, Callaghan, New South Wales, Australia
| | - Juliet M Taylor
- Genetic Health Service - Northern Hub, Genetic Health Service - Northern Hub, Aukland, New Zealand
| | - Domenico Barbuti
- Radiology and Bioimaging Unit, Bambino Gesu Pediatric Hospital, Roma, Lazio, Italy
| | - Annarosa Soresina
- Paediatrics Clinic and Institute for Molecular Medicine A. Nocivelli, Department of Clinical and Ex-perimental Sciences, ASST Spedali Civili di Brescia, Brescia, Lombardia, Italy
| | | | - Roberta Battini
- Department of Developmental Neuroscience, IRCCS Stella Maris Foundation, Calambrone, Toscana, Italy
- Department of Clinical and Experimental Medicine, University of Pisa, Pisa, Toscana, Italy
| | - Anna Cavalli
- Child Neurology and Psychiatry Unit, Azienda USL - IRCCS di Reggio Emilia, Reggio Emilia, Emilia-Romagna, Italy
| | - Carlo Fusco
- Child Neurology and Psychiatry Unit, Azienda USL - IRCCS di Reggio Emilia, Reggio Emilia, Emilia-Romagna, Italy
| | - Maria Iascone
- Laboratory of Medical Genetics, ASST Papa Giovanni XXIII, Bergamo, Lombardia, Italy
| | - Lionel Van Maldergem
- Centre de génétique humaine, Université de Franche-Comté, Centre Hospitalier Universitaire de Besancon, Besancon, France
| | | | - Orsetta Zuffardi
- Department of Molecular Medicine, University of Pavia, Pavia, Lombardia, Italy
| | - Samantha Vergano
- Division of Medical Genetics and Metabolism, Children's Hospital of The King's Daughters, Norfolk, Virginia, USA
| | - Livia Garavelli
- Medical Genetics Unit, Maternal and Child Health Department, Azienda USL-IRCCS di Reggio Emilia, Reggio Emilia, Emilia-Romagna, Italy
| | - Allan Bayat
- Department for Epilepsy Genetics and Personalized Medicine, Danish Epilepsy Centre, Dianalund, Denmark
- Institute for Regional Health Services Research, University of Southern Denmark, Odense, Syddanmark, Denmark
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6
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Devos J, Devriendt K, Richter J, Jansen K, Baldewijns M, Thal DR, Aertsen M. Fetal-onset Alexander disease with radiological-neuropathological correlation. Pediatr Radiol 2023; 53:2149-2153. [PMID: 37455276 DOI: 10.1007/s00247-023-05710-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] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/27/2023] [Revised: 06/16/2023] [Accepted: 06/20/2023] [Indexed: 07/18/2023]
Abstract
Alexander disease is a leukodystrophy caused by mutations in the GFAP gene, primarily affecting the astrocytes. This report describes the prenatal and post-mortem neuroimaging findings in a case of genetically confirmed, fetal-onset Alexander disease with pathological correlation after termination of pregnancy. The additional value of fetal brain magnetic resonance imaging in the third trimester as a complementary evaluation tool to neurosonography is shown for suspected cases of fetal-onset Alexander disease. Diffuse signal abnormalities of the periventricular white matter in association with thickening of the fornix and optic chiasm can point towards the diagnosis. Furthermore, the presence of atypical imaging findings such as microcephaly and cortical folding abnormalities in this case broadens our understanding of the phenotypic variability of Alexander disease.
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Affiliation(s)
- Johannes Devos
- Department of Radiology, University Hospitals Leuven (UZ), Herestraat 49, Louvain, 3000, Belgium.
| | - Koenraad Devriendt
- Center for Human Genetics, University of Leuven (KU) and University Hospitals Leuven (UZ), Louvain, Belgium
| | - Jute Richter
- Department of Gynecology and Obstetrics, University Hospitals Leuven (UZ), Louvain, Belgium
| | - Katrien Jansen
- Department of Development and Regeneration, University Hospitals Leuven (UZ), Louvain, Belgium
| | | | - Dietmar R Thal
- Laboratory for Neuropathology, Department of Imaging and Pathology and Leuven Brain Institute, University of Leuven (KU) and Department of Pathology, University Hospitals Leuven (UZ), Louvain, Belgium
| | - Michael Aertsen
- Department of Radiology, University Hospitals Leuven (UZ), Herestraat 49, Louvain, 3000, Belgium
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7
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Lubala TK, Kayembe-Kitenge T, Mubungu G, Lumaka A, Kanteng G, Savage S, Luboya O, Hagerman R, Devriendt K, Lukusa-Tshilobo P. Usefulness of automated image analysis for recognition of the fragile X syndrome gestalt in Congolese subjects. Eur J Med Genet 2023; 66:104819. [PMID: 37532084 DOI: 10.1016/j.ejmg.2023.104819] [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: 12/07/2022] [Revised: 07/16/2023] [Accepted: 07/30/2023] [Indexed: 08/04/2023]
Abstract
BACKGROUND Computer-aided software such as the facial image diagnostic aid (FIDA) and Face2Gene has been developed to perform pattern recognition of facial features with promising clinical results. The aim of this pilot study was to test Face2Gene's recognition performance on Bantu Congolese subjects with Fragile X syndrome (FXS) as compared to Congolese subjects with intellectual disability but without FXS (non-FXS). METHOD Frontal facial photograph from 156 participants (14 patients with FXS and 142 controls) predominantly young-adults to adults, median age 18.9 age range 4-39yo, were uploaded. Automated face analysis was conducted by using the technology used in proprietary software tools called Face2Gene CLINIC and Face2Gene RESEARCH (version 17.6.2). To estimate the statistical power of the Face2Gene technology in distinguishing affected individuals from controls, a cross validation scheme was used. RESULTS The similarity seen in the upper facial region (of males and females) is greater than the similarity seen in other parts of the face. Binary comparison of subjects with FXS versus non-FXS and subjects with FXS versus subjects with Down syndrome reveal an area under the curve values of 0.955 (p = 0.002) and 0.986 (p = 0.003). CONCLUSION The Face2Gene algorithm is separating well between FXS and Non-FXS subjects.
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Affiliation(s)
- Toni Kasole Lubala
- Division of Dysmorphology & Birth Defects, Department of Pediatrics, University of Lubumbashi, Democratic Republic of the Congo
| | - Tony Kayembe-Kitenge
- Unit of Toxicology and Environment, School of Public Health, University of Lubumbashi, Democratic Republic of the Congo; Center for Environment and Health, Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium; Higher Institute of Medical Techniques, Lubumbashi, Democratic Republic of the Congo.
| | - Gerrye Mubungu
- Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Democratic Republic of the Congo; Center for Human Genetics, National Institute for Biomedical Research (NIBR), Democratic Republic of the Congo; Center for Human Genetics, University Hospital Leuven, University of Leuven, Belgium
| | - Aimé Lumaka
- Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Democratic Republic of the Congo; Center for Human Genetics, National Institute for Biomedical Research (NIBR), Democratic Republic of the Congo; Center for Human Genetics, University Hospital Leuven, University of Leuven, Belgium; Department of Biomedical and Preclinical Sciences, GIGA-Rm Laboratory of Human Genetics, University of Liège, Liège, Belgium
| | - Gray Kanteng
- Division of Dysmorphology & Birth Defects, Department of Pediatrics, University of Lubumbashi, Democratic Republic of the Congo
| | | | - Oscar Luboya
- Division of Dysmorphology & Birth Defects, Department of Pediatrics, University of Lubumbashi, Democratic Republic of the Congo; Higher Institute of Medical Techniques, Lubumbashi, Democratic Republic of the Congo
| | - Randi Hagerman
- Department of Pediatrics, MIND Institute, University of California Davis Medical Center, Sacramento, CA, USA
| | - Koenraad Devriendt
- Center for Human Genetics, University Hospital Leuven, University of Leuven, Belgium
| | - Prosper Lukusa-Tshilobo
- Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Democratic Republic of the Congo; Center for Human Genetics, National Institute for Biomedical Research (NIBR), Democratic Republic of the Congo; Center for Human Genetics, University Hospital Leuven, University of Leuven, Belgium
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8
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Kabuyi PL, Mbayabo G, Ngole M, Zola AL, Race V, Matthijs G, Van Geet C, Tshilobo PL, Devriendt K, Mikobi TM. Hydroxyurea treatment for adult sickle cell anemia patients in Kinshasa. EJHaem 2023; 4:595-601. [PMID: 37601858 PMCID: PMC10435708 DOI: 10.1002/jha2.735] [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] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 05/20/2023] [Accepted: 06/08/2023] [Indexed: 08/22/2023]
Abstract
Background: Despite a high incidence of sickle cell anemia, hydroxyurea (HU) treatment is rarely used in the DR Congo. This study aims to assess the efficacy of HU, the incidence of side effects that may limit its use in adults and to determine the dose needed for clinical improvement in patients. Methods: In a prospective study, patients received an initial dose of 15 mg/kg/day which was increased by 5 mg/kg every 6 months, up to a maximum of 30 mg/kg/day. The response and side effects to HU were evaluated biologically and clinically every 3 months during a 2-year period. Results: Seventy adult patients with a moderate or severe clinical phenotype initiated treatment. Only minor side effects were reported. At the end of the 2-year treatment phase, 45 (64.3%) had dropped out, of whom 33 were without a clear reason. Clinical and biological improvement was more marked during the first year. There was a reduction in severe vaso-occlusive crises (p < 0.001), need for transfusion (p < 0.001), and hospitalization days (p = 0.038). Fetal hemoglobin (HbF) levels increased on average 2.9 times after 12 months (p < 0.001). The increase in mean corpuscular volume was greater in the first year (p < 0.001) than in the second year (p = 0.041). The decrease in leukocytes (p < 0.001) was significant during the first year. In 70% of patients, the 20 mg/kg/day dose was needed to reach the 20% HbF threshold. Conclusion: HU is effective and well tolerated. The magnitude of the response varies from one patient to another. Improvement of clinical manifestations is achieved in most patients with a relatively low dose. Effective implementation of HU treatment will require improved adherence to treatment.
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Affiliation(s)
- Paul Lumbala Kabuyi
- Department of PediatricsUniversity of KinshasaKinshasaDemocratic Republic of the Congo
- Center of Human GeneticsFaculty of MedicineUniversity of KinshasaKinshasaDemocratic Republic of the Congo
- Center for Human GeneticsKatholieke Universiteit Leuven and University Hospitals LeuvenLeuvenBelgium
| | - Gloire Mbayabo
- Department of PediatricsUniversity of KinshasaKinshasaDemocratic Republic of the Congo
- Center of Human GeneticsFaculty of MedicineUniversity of KinshasaKinshasaDemocratic Republic of the Congo
- Center for Human GeneticsKatholieke Universiteit Leuven and University Hospitals LeuvenLeuvenBelgium
| | - Mamy Ngole
- Center of Human GeneticsFaculty of MedicineUniversity of KinshasaKinshasaDemocratic Republic of the Congo
- Center for Human GeneticsKatholieke Universiteit Leuven and University Hospitals LeuvenLeuvenBelgium
- Department of Clinical BiologyUniversity of KinshasaKinshasaDemocratic Republic of the Congo
| | - Aimé Lumaka Zola
- Center of Human GeneticsFaculty of MedicineUniversity of KinshasaKinshasaDemocratic Republic of the Congo
| | - Valerie Race
- Center for Human GeneticsKatholieke Universiteit Leuven and University Hospitals LeuvenLeuvenBelgium
| | - Gert Matthijs
- Center for Human GeneticsKatholieke Universiteit Leuven and University Hospitals LeuvenLeuvenBelgium
| | - Chris Van Geet
- Department of Cardiovascular SciencesCenter for Molecular and Vascular BiologyKatholieke Universiteit LeuvenLeuvenBelgium
| | - Prosper Lukusa Tshilobo
- Center of Human GeneticsFaculty of MedicineUniversity of KinshasaKinshasaDemocratic Republic of the Congo
| | - Koenraad Devriendt
- Center for Human GeneticsKatholieke Universiteit Leuven and University Hospitals LeuvenLeuvenBelgium
| | - Tite Minga Mikobi
- Center of Human GeneticsFaculty of MedicineUniversity of KinshasaKinshasaDemocratic Republic of the Congo
- Departement des sciences de base, Laboratory of Biochemistry and Molecular Biology, Faculty of MedicineUniversity of KinshasaKinshasaDemocratic Republic of the Congo
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9
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van Renterghem V, Vilain C, Devriendt K, Casteels I, Smits G, Soblet J, Balikova I. Two siblings with Bosch-Boonstra-Schaaf optic atrophy syndrome due to parental gonadal mosaicism. Eur J Med Genet 2023; 66:104729. [PMID: 36775012 DOI: 10.1016/j.ejmg.2023.104729] [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: 04/12/2022] [Revised: 10/01/2022] [Accepted: 02/10/2023] [Indexed: 02/12/2023]
Abstract
Bosch-Boonstra-Schaaf Optic Atrophy Syndrome (BBSOAS, OMIM 615722) is a rare autosomal dominant disorder characterized by intellectual disability, optic atrophy, cortical visual impairment, mild facial dysmorphism, hypotonia, hearing problems, attention deficit and a thin corpus callosum. The gene underlying this disorder is NR2F1 located on chromosome 5q15 which encodes for a nuclear receptor protein. Mutations and deletions have been identified in patients. Here we report on a brother and a sister carrying a pathogenic nonsense NR2F1 variant. The patients have a mild phenotype showing optic atrophy, mild intellectual disability, dysmorphic features and thin corpus callosum. This correlates with previously described milder phenotypes in patients with mutations in this domain. The variant was not identified in the parental genome indicating most likely a gonadal mosaicism. Gonadal mosaicism has not yet been reported in Bosch-Boonstra-Schaaf Optic Atrophy Syndrome.
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Affiliation(s)
| | - Catheline Vilain
- Department of Genetics, University Hospital Erasme, Brussels, Belgium
| | | | - Ingele Casteels
- Department of Ophthalmology, University Hospitals Leuven, Leuven, Belgium
| | - Guillaume Smits
- Department of Genetics, University Hospital Erasme, Brussels, Belgium
| | - Julie Soblet
- Department of Genetics, University Hospital Erasme, Brussels, Belgium
| | - Irina Balikova
- Department of Ophthalmology, University Hospitals Leuven, Leuven, Belgium.
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10
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Lannoo L, van der Meij KRM, Bekker MN, De Catte L, Deckers S, Devriendt K, Roggen N, Galjaard RJH, Gitsels-van der Wal J, Macville MVE, Martin L, Sistermans EA, Van Calsteren K, Van Keirsbilck J, Crombag N, Henneman L. A cross-country comparison of pregnant women's decision-making and perspectives when opting for non-invasive prenatal testing in the Netherlands and Belgium. Prenat Diagn 2023; 43:294-303. [PMID: 36740754 DOI: 10.1002/pd.6329] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2022] [Revised: 01/27/2023] [Accepted: 01/28/2023] [Indexed: 02/07/2023]
Abstract
BACKGROUND The Netherlands and Belgium have been among the first countries to offer non-invasive prenatal testing (NIPT) as a first-tier screening test. Despite similarities, differences exist in counseling modalities and test uptake. This study explored decision-making and perspectives of pregnant women who opted for NIPT in both countries. METHODS A questionnaire study was performed among pregnant women in the Netherlands (NL) (n = 587) and Belgium (BE) (n = 444) opting for NIPT, including measures on informed choice, personal and societal perspectives on trisomy 21, 18 and 13 and pregnancy termination. RESULTS Differences between Dutch and Belgian women were shown in the level of informed choice (NL: 83% vs. BE: 59%, p < 0.001), intention to terminate the pregnancy in case of confirmed trisomy 21 (NL: 51% vs. BE: 62%, p = 0.003) and trisomy 13/18 (NL: 80% vs. BE: 73%, p = 0.020). More Belgian women considered trisomy 21 a severe condition (NL: 64% vs. BE: 81%, p < 0.001). Belgian women more frequently indicated that they believed parents are judged for having a child with trisomy 21 (BE: 42% vs. NL: 16%, p < 0.001) and were less positive about quality of care and support for children with trisomy 21 (BE: 23% vs. NL: 62%, p < 0.001). CONCLUSION Differences in women's decision-making regarding NIPT and the conditions screened for may be influenced by counseling aspects and country-specific societal and cultural contexts.
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Affiliation(s)
- Lore Lannoo
- Department of Obstetrics and Gynaecology, Fetomaternal Medicine, University Hospitals Leuven, Leuven, Belgium.,Department of Development and Regeneration, Cluster Woman and Child, Biomedical Sciences, KU Leuven, Leuven, Belgium
| | - Karuna R M van der Meij
- Department of Human Genetics, Amsterdam UMC, location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.,Amsterdam Reproduction and Development Research Institute, Amsterdam UMC, Amsterdam, The Netherlands
| | - Mireille N Bekker
- Department of Obstetrics and Gynaecology, Utrecht University Medical Center, Utrecht, The Netherlands
| | - Luc De Catte
- Department of Obstetrics and Gynaecology, Fetomaternal Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Sarah Deckers
- Department of Obstetrics and Gynaecology, Fetomaternal Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Koenraad Devriendt
- Department of Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Nele Roggen
- Department of Obstetrics and Gynaecology, AZ Imelda, Bonheiden, Belgium
| | - Robert-Jan H Galjaard
- Department of Clinical Genetics, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - Janneke Gitsels-van der Wal
- Department of Midwifery Science, Amsterdam UMC, location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.,Amsterdam Public Health Research Institute, Quality of Care, Amsterdam, The Netherlands
| | - Merryn V E Macville
- Department of Clinical Genetics, GROW School for Oncology and Reproduction, Maastricht University Medical Center+, Maastricht, The Netherlands
| | - Linda Martin
- Department of Midwifery Science, Amsterdam UMC, location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.,Midwifery Academy Amsterdam Groningen, InHolland, Amsterdam, The Netherlands
| | - Erik A Sistermans
- Department of Human Genetics, Amsterdam UMC, location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.,Amsterdam Reproduction and Development Research Institute, Amsterdam UMC, Amsterdam, The Netherlands
| | - Kristel Van Calsteren
- Department of Obstetrics and Gynaecology, Fetomaternal Medicine, University Hospitals Leuven, Leuven, Belgium.,Department of Development and Regeneration, Cluster Woman and Child, Biomedical Sciences, KU Leuven, Leuven, Belgium
| | | | - Neeltje Crombag
- Department of Development and Regeneration, Cluster Woman and Child, Biomedical Sciences, KU Leuven, Leuven, Belgium.,Department of Obstetrics and Gynaecology, Utrecht University Medical Center, Utrecht, The Netherlands
| | - Lidewij Henneman
- Department of Human Genetics, Amsterdam UMC, location Vrije Universiteit Amsterdam, Amsterdam, The Netherlands.,Amsterdam Reproduction and Development Research Institute, Amsterdam UMC, Amsterdam, The Netherlands
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11
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Lumbala PK, Mbayabo G, Ngole MN, Lumaka A, Race V, Matthijs G, Van Geet C, Lukusa PT, Devriendt K, Mikobi TM. Clinical and laboratory characterization of adult sickle cell anemia patients in Kinshasa. PLoS One 2022; 17:e0278478. [PMID: 36525434 PMCID: PMC9757547 DOI: 10.1371/journal.pone.0278478] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2022] [Accepted: 11/16/2022] [Indexed: 12/23/2022] Open
Abstract
BACKGROUND Sickle cell anemia (SCA) is a monogenic hemoglobinopathy associated with severe acute and chronic complications, with the highest incidence worldwide in Sub-Saharan Africa. The wide variability in clinical manifestations suggest that a uniform response to hydroxurea may not be attained. In view of a potential treatment with hydroxyurea (HU), we assessed the variability of clinical and hematological manifestations in a cohort of adults with SCA in Kinshasa, capital of the DR Congo in Central Africa. METHODS A cross-sectional study was conducted in a hospital dedicated to SCA management in Kinshasa. Clinical history of patients was recorded, a complete physical examination performed. The diagnosis was confirmed by means of DNA analysis. A full blood count and hemolysis markers were measured. The severity of the disease was evaluated by means of a previously reported score. RESULTS The study group consisted of 166 genetically confirmed SCA patients. The SCA severity was mild in 28.9%, moderate in 64.5% and severe in 6.6%. The disease severity score increased with patient's age (p ≤ 0.001). The severity was higher in males compared to females (p = 0.012). In males, the severity score was correlated with the presence of priapism (p = 0.045), a manifestation not previously incorporated in the severity score. The severity score was inversely correlated with the fetal hemoglobin (HbF) rate (p = 0.005). Malnutrition (BMI <18.5 kg/m2) was present in 47% of patients and was related to the male sex, hip disease (aOR 3.11; p = 0.019) and severe phenotype (aOR 3.53; p = 0.012). Leg ulcers were more frequent in males than in females (p = 0.001; OR 24.3) and were correlated with the number of days of hospitalization (p = 0.029). Hip disease was related to the increasing age (p = 0.008). CONCLUSION In this selected, hospital-based populations of adults with SCA, severe disease was rare, which may be due to survival bias. However, two thirds had moderate severity of the disease, mostly with a low HbF, and they may benefit from HU treatment. In the Central-African setting the separation between vaso-occlusive and hyperhemolytic sub-phenotypes was not applicable.
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Affiliation(s)
| | - Gloire Mbayabo
- Department of Pediatrics, University of Kinshasa, Kinshasa, DRC
| | - Mamy Nzita Ngole
- Department of Clinical Biology, University of Kinshasa, Kinshasa, DRC
| | - Aimé Lumaka
- Faculty of Medicine, Center of Human Genetics, University of Kinshasa, Kinshasa, DRC
| | - Valerie Race
- Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium
| | - Gert Matthijs
- Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium
| | - Chris Van Geet
- Department of Cardiovascular Sciences, Center for Molecular and Vascular Biology, KU Leuven, Leuven, Belgium
| | | | - Koenraad Devriendt
- Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium
- * E-mail: (KD); (TMM)
| | - Tite Minga Mikobi
- Faculty of Medicine, Center of Human Genetics, University of Kinshasa, Kinshasa, DRC
- Faculty of Medicine, Molecular Biology and Human Genetics Department of fundamental sciences, University of Kinshasa, Kinshasa, DRC
- * E-mail: (KD); (TMM)
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12
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Lannoo L, van Straaten K, Breckpot J, Brison N, De Catte L, Dimitriadou E, Legius E, Peeters H, Parijs I, Tsuiko O, Vancoillie L, Vermeesch JR, Van Buggenhout G, Van Den Bogaert K, Van Calsteren K, Devriendt K. Rare autosomal trisomies detected by non-invasive prenatal testing: an overview of current knowledge. Eur J Hum Genet 2022; 30:1323-1330. [PMID: 35896702 PMCID: PMC9712527 DOI: 10.1038/s41431-022-01147-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [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: 04/10/2022] [Revised: 06/15/2022] [Accepted: 06/30/2022] [Indexed: 12/16/2022] Open
Abstract
Non-invasive prenatal testing has been introduced for the detection of Trisomy 13, 18, and 21. Using genome-wide screening also other "rare" autosomal trisomies (RATs) can be detected with a frequency about half the frequency of the common trisomies in the large population-based studies. Large prospective studies and clear clinical guidelines are lacking to provide adequate counseling and management to those who are confronted with a RAT as a healthcare professional or patient. In this review we reviewed the current knowledge of the most common RATs. We compiled clinical relevant parameters such as incidence, meiotic or mitotic origin, the risk of fetal (mosaic) aneuploidy, clinical manifestations of fetal mosaicism for a RAT, the effect of confined placental mosaicism on placental function and the risk of uniparental disomy (UPD). Finally, we identified gaps in the knowledge on RATs and highlight areas of future research. This overview may serve as a first guide for prenatal management for each of these RATs.
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Affiliation(s)
- Lore Lannoo
- Department of Obstetrics and Gynaecology, Division Woman and Child, University Hospitals Leuven, Leuven, Belgium
| | | | - Jeroen Breckpot
- Department of Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Nathalie Brison
- Department of Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Luc De Catte
- Department of Obstetrics and Gynaecology, Division Woman and Child, University Hospitals Leuven, Leuven, Belgium
| | | | - Eric Legius
- Department of Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Hilde Peeters
- Department of Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Ilse Parijs
- Department of Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Olga Tsuiko
- Department of Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Leen Vancoillie
- Department of Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | | | | | | | - Kristel Van Calsteren
- Department of Obstetrics and Gynaecology, Division Woman and Child, University Hospitals Leuven, Leuven, Belgium
| | - Koenraad Devriendt
- Department of Human Genetics, University Hospitals Leuven, Leuven, Belgium.
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13
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Mubungu G, Roelants M, Lumaka A, Makay P, Tshika D, Lubala T, Tshilobo Lukusa P, Devriendt K. Objective evaluation of facial features in Congolese newborns by facial measurements. The need for population-specific measurements. Am J Med Genet A 2022; 188:3063-3070. [PMID: 35986581 DOI: 10.1002/ajmg.a.62958] [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: 10/21/2021] [Revised: 05/09/2022] [Accepted: 07/20/2022] [Indexed: 01/31/2023]
Abstract
The evaluation of dysmorphism is often subjective because many continuous traits are not easily measured or lack normal values. Because many common morphologic profiles vary between populations, population-specific reference ranges of relevant traits are needed. We aim to evaluate the objective assessment of facial dysmorphism in 553 Congolese newborns based on facial measurements. Measurements taken with a ruler were on average larger compared to those with a caliper, but the bias did not depend on the size of the measurement. We therefore introduced a correction factor that allows to use both techniques for facial measurements interchangeably in future studies. The outer canthal distance, palpebral fissure length, and mouth width were significantly larger in Congolese newborns (respectively mean 6.59 [SD 0.48]; mean 2.20 [SD 0.24]; mean 2.78 [SD 0.26]) when compared to references based on European newborns (respectively mean 3.59 [SD 1.76]; mean 4.20 [SD 2.26]; mean 0.47 [SD 1.21]), while the rest of measurements were significantly smaller. The interpupillary distance (IPD) calculated from inner canthal distance and outer canthal distance was not significantly different. We observed a poor agreement between clinical evaluation and measured features (kappa of 0.432). Clinicians were more likely to recognize a face as having wide-spaced eyes when it had been recognized as such during the clinical examination, more than if the child had a high interpupillary distance. This suggests that the measured IPD is not precisely reflecting what is clinically evaluated as wide-spaced eyes.
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Affiliation(s)
- Gerrye Mubungu
- Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Centre for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
| | - Mathieu Roelants
- Environment and Health, Department of Public Health and Primary Care, KU Leuven-University of Leuven, Leuven, Belgium
| | - Aimé Lumaka
- Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Département des Sciences Biomédicales et Précliniques, GIGA-R, Laboratoire de Génétique Humaine, University of Liège, Liège, Belgium
| | - Prince Makay
- Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Centre for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
| | - Dahlie Tshika
- Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Centre for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
| | - Toni Lubala
- Department of Pediatrics, Faculty of Medicine, University of Lubumbashi, Lubumbashi, Democratic Republic of the Congo
| | - Prosper Tshilobo Lukusa
- Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Centre for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
| | - Koenraad Devriendt
- Centre for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
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Laetitia MM, Veronique K, Mamy NZ, Cathy SM, Aimé L, Race V, Prosper LT, Devriendt K. Molecular genetic characterization of Congolese patients with oculocutaneous albinism. Eur J Med Genet 2022; 65:104611. [PMID: 36116698 DOI: 10.1016/j.ejmg.2022.104611] [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: 03/31/2022] [Revised: 08/16/2022] [Accepted: 09/06/2022] [Indexed: 11/03/2022]
Abstract
BACKGROUND Oculocutaneous albinism (OCA) is an autosomal recessive genetic disorder associated with reduced or absent pigmentation in the skin, hair and eyes. OCA type 2 (OCA2) is the most common type in Sub-Saharan Africa, related to a recurrent 2.7 kb intragenic deletion. Genomic data from Congolese patients are lacking. We aimed to describe genetic causes of OCA2 in a cohort of Congolese persons with OCA, and explore possible genotype-phenotype correlations. METHODS A cross sectional study was conducted from January 2015 to December 2017 in Kinshasa, Democratic Republic of Congo (DRC). 165 Congolese unrelated families with non-syndromic OCA, identified through patients' associations, consented to participate to this study. All index cases were tested for the known 2.7 kb deletion involving the exon 7 of the OCA2 gene. Patients heterozygous for the deletion underwent Sanger sequencing of all exons and flanking sequences in the OCA2 gene. Family segregation was performed for candidate pathogenic variants. RESULTS The 2.7 kb deletion in the OCA2 gene was identified in 136/165 (82.4%) index cases, including 113 (68.5%) homozygotes and 23 (13.9%) heterozygotes. Sanger sequencing identified a pathogenic or likely pathogenic variant in the OCA2 gene in 12 out of 23 heterozygotes investigated (52.1%). Segregation analysis allowed us to locate the point mutation on the trans allele in the three patients from whom parental DNA was available. CONCLUSION The OCA2 2.7 kb deletion is the major cause of non-syndromic OCA in Congolese patients recruited in this study, confirming results from other Sub-Saharan African populations. Several additional mutations were detected in OCA patient's heterozygote for the deletion, with to date no evidence for a second frequent founder mutation. The confirmation of a single mutation as the major cause will facilitate genetic counselling in this country.
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Affiliation(s)
- Mavinga Mpola Laetitia
- Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Democratic Republic of the Congo, The; Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Democratic Republic of the Congo, The.
| | - Kakiese Veronique
- Department of Dermatology, Faculty of Medicine, University of Kinshasa, Democratic Republic of the Congo, The
| | - Ngole Zita Mamy
- Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Democratic Republic of the Congo, The
| | - Songo Mbodo Cathy
- Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Democratic Republic of the Congo, The
| | - Lumaka Aimé
- Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Democratic Republic of the Congo, The; Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Democratic Republic of the Congo, The; Laboratory of Human Genetics, GIGA-R, University of Liège, Belgium
| | - Valerie Race
- Center for Human Genetics, University Hospital, KU Leuven, Belgium
| | - Lukusa Tshilobo Prosper
- Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Democratic Republic of the Congo, The; Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Democratic Republic of the Congo, The; Center for Human Genetics, University Hospital, KU Leuven, Belgium
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15
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Makay P, Mubungu G, Mupuala A, Bluske K, Brown C, Schmidt SA, Ngole M, Fuanani P, Perry DL, Lukusa P, Devriendt K, Taft RJ, Lumaka A. PERCHING syndrome: Clinical presentation in the first African patient confirmed by clinical whole genome sequencing. Am J Med Genet A 2022; 188:2825-2831. [PMID: 35670385 DOI: 10.1002/ajmg.a.62855] [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: 12/20/2021] [Revised: 04/17/2022] [Accepted: 05/12/2022] [Indexed: 01/25/2023]
Abstract
PERCHING syndrome is a rare multisystem developmental disorder caused by autosomal recessive (AR) variants (truncating and missense) in the Kelch-like family member 7 gene (KLHL7). We report the first phenotypic and molecular description of PERCHING syndrome in a patient from Central Africa. The patient presented multiple dysmorphic features in addition to neurological, respiratory, gastroenteric, and dysautonomic disorders. Clinical Whole Genome Sequencing in the proband and his mother identified two novel heterozygous variants in the KLHL7 gene, including a maternally inherited intronic variant (NM_001031710.2:c.793 + 5G > C) classified as Variant of Uncertain Significance and a frameshift stop gain variant (NM_001031710.2:c.944delG; p.Ser315ThrfsTer23) of unknown inheritance classified as likely pathogenic. Although the diagnosis was only evoked after genomic testing, the review of published patients suggests that this disease could be clinically recognizable and maybe considered as an encephalopathy. Our report will allow expanding the phenotypic and molecular spectrum of Perching syndrome.
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Affiliation(s)
- Prince Makay
- Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Centre for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
| | - Gerrye Mubungu
- Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Centre for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
| | - Aimée Mupuala
- Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | | | | | | | - Mamy Ngole
- Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | - Patrick Fuanani
- Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo
| | | | - Prosper Lukusa
- Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Centre for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
| | - Koenraad Devriendt
- Centre for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
| | | | - Aimé Lumaka
- Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of the Congo.,Laboratoire de Génétique Humaine, GIGA-Research Institute, University of Liège, Liège, Belgium
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16
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Mbayabo G, Lumbala Kabuyi P, Ngole M, Lumaka A, Race V, Maisin D, Gruson D, Matthijs G, Minga TM, Devriendt K, Van Geet C, Tshilobo PL. Value of DNA testing in the diagnosis of sickle-cell anemia in childhood in an environment with a high prevalence of other causes of anemia. J Clin Lab Anal 2022; 36:e24593. [PMID: 35819088 PMCID: PMC9396195 DOI: 10.1002/jcla.24593] [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: 01/20/2022] [Revised: 06/14/2022] [Accepted: 06/23/2022] [Indexed: 11/09/2022] Open
Abstract
Background Sickle‐cell anemia (SCA) is the most common genetic disease worldwide caused by a single mutation in the gene HBB. DNA testing can help to clarify the diagnosis when Hb electrophoresis is inconclusive. We evaluated the usefulness and feasibility of DNA‐based diagnosis of SCA in rural Central Africa. Methods This is a cross‐sectional study conducted from November 2016 to end October 2017 in the Hôpital Saint Luc de Kisantu, located 120 km from Kinshasa. This hospital offers the management of SCA patients, mainly identified using the Sickling test (Emmel test) combined with clinical features. We included patients aged 6 months to 18 years locally diagnosed as SCA, and we collected clinical and hematological data. All patients were offered Hb electrophoresis and DNA testing at the Center for Human Genetics of the University of Kinshasa. Results This study included 160 patients. Hemoglobin capillary electrophoresis suggested that 136 (85%) were homozygote SS, 13 (8.1%) were heterozygote (AS), and 11 (6.9%) were homozygote normal (AA). DNA testing confirmed these electrophoresis findings, with the exception of four patients, two AS in electrophoresis were found SS due to recent transfusion, and two SS in electrophoresis were found AS because they have compound heterozygous form S/β°‐thalassemia. The diagnosis of SCA was therefore wrongly ascertained with Emmel test in 15% of patients. Conclusion This study reveals a high proportion of false‐positive SCA diagnoses in a rural environment in Central Africa. This underlines the importance of DNA testing in conjunction with Hb electrophoresis.
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Affiliation(s)
- Gloire Mbayabo
- Department of Pediatrics, University of Kinshasa, Kinshasa, Democratic Republic of Congo.,Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium.,Center of Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo
| | - Paul Lumbala Kabuyi
- Department of Pediatrics, University of Kinshasa, Kinshasa, Democratic Republic of Congo.,Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium.,Center of Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo
| | - Mamy Ngole
- Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium.,Center of Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo.,Department of Clinical Biology, University of Kinshasa, Kinshasa, Democratic Republic of Congo
| | - Aimé Lumaka
- Department of Pediatrics, University of Kinshasa, Kinshasa, Democratic Republic of Congo.,Center of Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo.,Human Genetic Laboratory, GIGA Institute, University of Liège, Liège, Belgium
| | - Valerie Race
- Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium
| | - Diane Maisin
- Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Damien Gruson
- Cliniques Universitaires Saint-Luc, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Gert Matthijs
- Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium
| | - Tite Mikobi Minga
- Center of Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo.,Département des sciences de base, Laboratory of biochemistry and molecular biology; Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo
| | - Koenraad Devriendt
- Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium
| | - Chris Van Geet
- Department of Cardiovascular Sciences and Pediatrics (Hemato-oncology), KU Leuven and University Hospitals Leuven, Leuven, Belgium
| | - Prosper Lukusa Tshilobo
- Department of Pediatrics, University of Kinshasa, Kinshasa, Democratic Republic of Congo.,Center for Human Genetics, KU Leuven and University Hospitals Leuven, Leuven, Belgium.,Center of Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo
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17
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Lumaka A, Carstens N, Devriendt K, Krause A, Kulohoma B, Kumuthini J, Mubungu G, Mukisa J, Nel M, Olanrewaju TO, Lombard Z, Landouré G. Increasing African genomic data generation and sharing to resolve rare and undiagnosed diseases in Africa: a call-to-action by the H3Africa rare diseases working group. Orphanet J Rare Dis 2022; 17:230. [PMID: 35710439 PMCID: PMC9201791 DOI: 10.1186/s13023-022-02391-w] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 06/06/2022] [Indexed: 11/10/2022] Open
Abstract
The rich and diverse genomics of African populations is significantly underrepresented in reference and in disease-associated databases. This renders interpreting the Next Generation Sequencing (NGS) data and reaching a diagnostic more difficult in Africa and for the African diaspora. It increases chances for false positives with variants being misclassified as pathogenic due to their novelty or rarity. We can increase African genomic data by (1) making consent for sharing aggregate frequency data an essential component of research toolkit; (2) encouraging investigators with African data to share available data through public resources such as gnomAD, AVGD, ClinVar, DECIPHER and to use MatchMaker Exchange; (3) educating African research participants on the meaning and value of sharing aggregate frequency data; and (4) increasing funding to scale-up the production of African genomic data that will be more representative of the geographical and ethno-linguistic variation on the continent. The RDWG of H3Africa is hereby calling to action because this underrepresentation accentuates the health disparities. Applying the NGS to shorten the diagnostic odyssey or to guide therapeutic options for rare diseases will fully work for Africans only when public repositories include sufficient data from African subjects.
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Affiliation(s)
- Aimé Lumaka
- Department of Pediatrics, Faculty of Medicine, Centre for Human Genetics, University of Kinshasa, Kinshasa, Congo. .,Laboratoire de Génétique Humaine, GIGA-Research Institute, University of Liège, Bât. B34 +2, Sart Tilman, Avenue de l'Hôpital 13, 4000, Liège, Belgium.
| | - Nadia Carstens
- Division of Human Genetics, National Health Laboratory Service, and School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Koenraad Devriendt
- Centre for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
| | - Amanda Krause
- Division of Human Genetics, National Health Laboratory Service, and School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Benard Kulohoma
- Centre for Biotechnology and Bioinformatics, University of Nairobi, Nairobi, Kenya.,ADVANCE, IAVI, Nairobi, Kenya
| | - Judit Kumuthini
- South African National Bioinformatics Institute (SANBI), University of Western Cape (UWC), Robert Sobukwe Road Bellville, Cape Town, 7535, Republic of South Africa
| | - Gerrye Mubungu
- Department of Pediatrics, Faculty of Medicine, Centre for Human Genetics, University of Kinshasa, Kinshasa, Congo.,Centre for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
| | - John Mukisa
- Department of Immunology and Molecular Biology, Makerere University College of Health Sciences, Third Floor, Pathology & Microbiology building Upper Mulago Hill, P.O.Box 7072, Kampala, Uganda
| | - Melissa Nel
- Neurology Research Group, Neuroscience Institute, University of Cape Town, Cape Town, 7925, South Africa
| | - Timothy O Olanrewaju
- Division of Nephrology, Department of Medicine, University of Ilorin and University of Ilorin Teaching Hospital, Tanke Road, PMB 1515, Ilorin, Kwara State, Nigeria.,Julius Global Health, Julius Center for Health Sciences and Primary Care, University Medical Center Utrecht, Utrecht University, Utrecht, The Netherlands
| | - Zané Lombard
- Division of Human Genetics, National Health Laboratory Service, and School of Pathology, Faculty of Health Sciences, University of the Witwatersrand, Johannesburg, South Africa
| | - Guida Landouré
- Faculté de Médecine Et d'Odontostomatologie, USTTB, Bamako, Mali.,Service de Neurologie, Centre Hospitalier Universitaire du Point G, Bamako, Mali
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18
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Ngole M, Race V, Mbayabo G, Lumbala P, Songo C, Lukusa PT, Devriendt K, Matthijs G, Lumaka A. DNA testing for sickle cell anemia in Africa: Implementation choices for the Democratic Republic of Congo. J Clin Lab Anal 2022; 36:e24398. [PMID: 35405024 PMCID: PMC9102645 DOI: 10.1002/jcla.24398] [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: 11/15/2021] [Revised: 03/17/2022] [Accepted: 03/22/2022] [Indexed: 11/08/2022] Open
Abstract
BACKGROUND Hemoglobin-based tests form the reference diagnostic test for SCA. In limited resource countries, these tests face limitations including cost, low sensitivity due to recurrent transfusions in endemic malaria region, and interference from fetal hemoglobin in neonatal diagnostic. This study aimed at adapting DNA-based SCA tests to limited resource countries and evaluating the economic benefit. METHODS 338 participants were recruited in the Democratic Republic of Congo, sorted in 3 cohorts based on venous blood, umbilical cord blood (UCB) and buccal swab sampling. RFLP was performed to identify mutated allele. The feasibility and technical validity of this RFLP was evaluated for specimens collected on DBS cards and on EDTA tubes. RFLP on DBS stored at room temperature was regularly repeated to assess sample conservation. Finally, the cost analysis was performed. RESULTS DBS cards yielded identical results to extracted DNA. Repeated testing returned the same result after four years. The DBS-based test performed on UCB or on buccal swab had a sensitivity and a precision of 100%. Cost comparison indicated that our approach costs half price of the widely used isoelectrofocussing of hemoglobin. CONCLUSION The implemented DNA-based test approach overcomes the limitations faced by hemoglobin-based tests, while being more affordable. We propose to implement the RFLP test as a first line diagnostic test after transfusion and as second tiers for newborn screening. However, users should be aware that this test is unable to differentiate HbC from HbS or identify other point mutation of gene deletion of HBB gene.
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Affiliation(s)
- Mamy Ngole
- Center for Human Genetics, Faculty of Medicine, KU Leuven, Leuven, Belgium.,Center for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo.,Department of Medical Biology, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo
| | - Valerie Race
- Center for Human Genetics, Faculty of Medicine, KU Leuven, Leuven, Belgium
| | - Gloire Mbayabo
- Center for Human Genetics, Faculty of Medicine, KU Leuven, Leuven, Belgium.,Center for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo.,Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo
| | - Paul Lumbala
- Center for Human Genetics, Faculty of Medicine, KU Leuven, Leuven, Belgium.,Center for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo.,Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo
| | - Cathy Songo
- Center for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo
| | - Prosper Tshilobo Lukusa
- Center for Human Genetics, Faculty of Medicine, KU Leuven, Leuven, Belgium.,Center for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo.,Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo
| | - Koenraad Devriendt
- Center for Human Genetics, Faculty of Medicine, KU Leuven, Leuven, Belgium
| | - Gert Matthijs
- Center for Human Genetics, Faculty of Medicine, KU Leuven, Leuven, Belgium
| | - Aimé Lumaka
- Center for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo.,Department of Pediatrics, Faculty of Medicine, University of Kinshasa, Kinshasa, Democratic Republic of Congo.,GIGA-R, Laboratoire de Génétique Humaine, University of Liège, Liège, Belgium
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19
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De Decker M, Cassiman C, Casteels I, Devriendt K, Delbeke P. Extraocular muscle hypoplasia associated with Axenfeld-Rieger syndrome. Strabismus 2021; 29:216-220. [PMID: 34709103 DOI: 10.1080/09273972.2021.1987926] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
We describe a four-year-old girl with bilateral severe iris hypoplasia and secondary ocular hypertension. Genetic testing revealed a de novo deletion in the FOXC1 gene, establishing the diagnosis of Axenfeld-Rieger syndrome (ARS). The girl developed a gradually increasing exotropia, up to 95 prism diopters by the age of 3 years wherefore strabismus surgery was performed. Intra-operatively, only very rudimentary developed medial and lateral rectus muscles were found. This is the first observation of pronounced hypoplasia of both medial and lateral rectus muscles associated with ARS.
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Affiliation(s)
- Milo De Decker
- Department of Ophthalmology, University Hospitals Leuven, Leuven
| | | | - Ingele Casteels
- Department of Ophthalmology, University Hospitals Leuven, Leuven
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20
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Rodrigues Bento J, Feben C, Kempers M, van Rij M, Woiski M, Devriendt K, De Catte L, Baldewijns M, Alaerts M, Meester J, Verstraeten A, Hendson W, Loeys B. Two novel presentations of KCNMA1-related pathology--Expanding the clinical phenotype of a rare channelopathy. Mol Genet Genomic Med 2021; 9:e1797. [PMID: 34499417 PMCID: PMC8580096 DOI: 10.1002/mgg3.1797] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [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: 11/24/2020] [Revised: 05/19/2021] [Accepted: 08/13/2021] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND KCNMA1 mutations have recently been associated with a wide range of dysmorphological, gastro-intestinal, cardiovascular, and neurological manifestations. METHODS Whole exome sequencing was performed in order to identify the underlying pathogenic mutation in two cases presenting with diverse phenotypical manifestations that did not fit into well-known clinical entities. RESULTS In an 8-year-old boy presenting with severe aortic dilatation, facial dysmorphism, and overgrowth at birth a de novo p.Gly375Arg KCNMA1 mutation was identified which has been reported previously in association with gingival hypertrophy, aortic dilatation, and developmental delay. Additionally, in a 30-week-old fetus with severe growth retardation and duodenal atresia a de novo p.Pro805Leu KCNMA1 mutation was identified. The latter has also been reported before in a boy with severe neurological manifestations, including speech delay, developmental delay, and cerebellar dysfunction. CONCLUSION The current report presents the first antenatal presentation of a pathogenic KCNMA1 mutation and confirms the specific association of the p.Gly375Arg variant with early onset aortic root dilatation, gingival hypertrophy, and neonatal overgrowth.
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Affiliation(s)
- Jotte Rodrigues Bento
- Centre of Medical Genetics, Antwerp University Hospital, University of Antwerp, Antwerp, Belgium
| | - Candice Feben
- Division of Human Genetics, National Health Laboratory Service & The School of Pathology, University of the Witwatersrand, Johannesburg-Braamfontein, South Africa
| | - Marlies Kempers
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Maartje van Rij
- Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands.,Department of Gynaecology and Obstetrics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Mallory Woiski
- Department of Gynaecology and Obstetrics, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Koenraad Devriendt
- Department of Human Genetics, Catholic University of Leuven, Leuven, Belgium
| | - Luc De Catte
- Department of Gynaecology and Obstetrics, Catholic University of Leuven, Leuven, Belgium
| | - Marcella Baldewijns
- Department of Gynaecology and Obstetrics, Catholic University of Leuven, Leuven, Belgium
| | - Maaike Alaerts
- Centre of Medical Genetics, Antwerp University Hospital, University of Antwerp, Antwerp, Belgium
| | - Josephina Meester
- Centre of Medical Genetics, Antwerp University Hospital, University of Antwerp, Antwerp, Belgium
| | - Aline Verstraeten
- Centre of Medical Genetics, Antwerp University Hospital, University of Antwerp, Antwerp, Belgium
| | - Willy Hendson
- Department of Paediatrics, Rahima Moosa Mother and Child Hospital & The University of the Witwatersrand, Johannesburg-Braamfontein, South Africa
| | - Bart Loeys
- Centre of Medical Genetics, Antwerp University Hospital, University of Antwerp, Antwerp, Belgium.,Department of Human Genetics, Radboud University Medical Center, Nijmegen, The Netherlands
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Duerinckx S, Désir J, Perazzolo C, Badoer C, Jacquemin V, Soblet J, Maystadt I, Tunca Y, Blaumeiser B, Ceulemans B, Courtens W, Debray F, Destree A, Devriendt K, Jansen A, Keymolen K, Lederer D, Loeys B, Meuwissen M, Moortgat S, Mortier G, Nassogne M, Sekhara T, Van Coster R, Van Den Ende J, Van der Aa N, Van Esch H, Vanakker O, Verhelst H, Vilain C, Weckhuysen S, Passemard S, Verloes A, Aeby A, Deconinck N, Van Bogaert P, Pirson I, Abramowicz M. Phenotypes and genotypes in non-consanguineous and consanguineous primary microcephaly: High incidence of epilepsy. Mol Genet Genomic Med 2021; 9:e1768. [PMID: 34402213 PMCID: PMC8457702 DOI: 10.1002/mgg3.1768] [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] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Revised: 05/06/2021] [Accepted: 07/03/2021] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Primary microcephaly (PM) is defined as a significant reduction in occipitofrontal circumference (OFC) of prenatal onset. Clinical and genetic heterogeneity of PM represents a diagnostic challenge. METHODS We performed detailed phenotypic and genomic analyses in a large cohort (n = 169) of patients referred for PM and could establish a molecular diagnosis in 38 patients. RESULTS Pathogenic variants in ASPM and WDR62 were the most frequent causes in non-consanguineous patients in our cohort. In consanguineous patients, microarray and targeted gene panel analyses reached a diagnostic yield of 67%, which contrasts with a much lower rate in non-consanguineous patients (9%). Our series includes 11 novel pathogenic variants and we identify novel candidate genes including IGF2BP3 and DNAH2. We confirm the progression of microcephaly over time in affected children. Epilepsy was an important associated feature in our PM cohort, affecting 34% of patients with a molecular confirmation of the PM diagnosis, with various degrees of severity and seizure types. CONCLUSION Our findings will help to prioritize genomic investigations, accelerate molecular diagnoses, and improve the management of PM patients.
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Affiliation(s)
- Sarah Duerinckx
- Institut de Recherche Interdisciplinaire en Biologie Humaine et moléculaireUniversité Libre de BruxellesBrusselsBelgium
| | - Julie Désir
- Centre de Génétique HumaineInstitut de Pathologie et de GénétiqueGosseliesBelgium
| | - Camille Perazzolo
- Institut de Recherche Interdisciplinaire en Biologie Humaine et moléculaireUniversité Libre de BruxellesBrusselsBelgium
| | - Cindy Badoer
- Department of GeneticsHôpital ErasmeULB Center of Human GeneticsUniversité Libre de BruxellesBrusselsBelgium
| | - Valérie Jacquemin
- Institut de Recherche Interdisciplinaire en Biologie Humaine et moléculaireUniversité Libre de BruxellesBrusselsBelgium
| | - Julie Soblet
- Department of GeneticsHôpital ErasmeULB Center of Human GeneticsUniversité Libre de BruxellesBrusselsBelgium
- Hôpital Universitaire des Enfants Reine Fabiola (HUDERF)Université Libre de BruxellesBrusselsBelgium
| | - Isabelle Maystadt
- Centre de Génétique HumaineInstitut de Pathologie et de GénétiqueGosseliesBelgium
| | - Yusuf Tunca
- Department of Medical GeneticsGülhane Faculty of Medicine & Gülhane Training and Research HospitalUniversity of Health Sciences TurkeyAnkaraTurkey
| | | | | | | | | | - Anne Destree
- Centre de Génétique HumaineInstitut de Pathologie et de GénétiqueGosseliesBelgium
| | | | - Anna Jansen
- Universitair Ziekenhuis Brussel (UZ Brussel)Centrum Medische GeneticaUniversiteit Brussel (VUB)BrusselsBelgium
| | - Kathelijn Keymolen
- Universitair Ziekenhuis Brussel (UZ Brussel)Centrum Medische GeneticaUniversiteit Brussel (VUB)BrusselsBelgium
| | - Damien Lederer
- Centre de Génétique HumaineInstitut de Pathologie et de GénétiqueGosseliesBelgium
| | - Bart Loeys
- University and University Hospital of AntwerpAntwerpBelgium
| | | | - Stéphanie Moortgat
- Centre de Génétique HumaineInstitut de Pathologie et de GénétiqueGosseliesBelgium
| | - Geert Mortier
- University and University Hospital of AntwerpAntwerpBelgium
| | | | | | | | | | | | - Hilde Van Esch
- Center for Human GeneticsUniversity Hospitals LeuvenLeuvenBelgium
| | | | | | - Catheline Vilain
- Department of GeneticsHôpital ErasmeULB Center of Human GeneticsUniversité Libre de BruxellesBrusselsBelgium
- Hôpital Universitaire des Enfants Reine Fabiola (HUDERF)Université Libre de BruxellesBrusselsBelgium
| | | | | | - Alain Verloes
- Department of GeneticsAPHPRobert Debré University HospitalParisFrance
| | - Alec Aeby
- Hôpital Universitaire des Enfants Reine Fabiola (HUDERF)Université Libre de BruxellesBrusselsBelgium
| | - Nicolas Deconinck
- Hôpital Universitaire des Enfants Reine Fabiola (HUDERF)Université Libre de BruxellesBrusselsBelgium
| | | | - Isabelle Pirson
- Institut de Recherche Interdisciplinaire en Biologie Humaine et moléculaireUniversité Libre de BruxellesBrusselsBelgium
| | - Marc Abramowicz
- Institut de Recherche Interdisciplinaire en Biologie Humaine et moléculaireUniversité Libre de BruxellesBrusselsBelgium
- Department of Genetic Medicine and DevelopmentUniversity of GenevaGenèveSwitzerland
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Audain E, Wilsdon A, Breckpot J, Izarzugaza JMG, Fitzgerald TW, Kahlert AK, Sifrim A, Wünnemann F, Perez-Riverol Y, Abdul-Khaliq H, Bak M, Bassett AS, Benson DW, Berger F, Daehnert I, Devriendt K, Dittrich S, Daubeney PE, Garg V, Hackmann K, Hoff K, Hofmann P, Dombrowsky G, Pickardt T, Bauer U, Keavney BD, Klaassen S, Kramer HH, Marshall CR, Milewicz DM, Lemaire S, Coselli JS, Mitchell ME, Tomita-Mitchell A, Prakash SK, Stamm K, Stewart AFR, Silversides CK, Siebert R, Stiller B, Rosenfeld JA, Vater I, Postma AV, Caliebe A, Brook JD, Andelfinger G, Hurles ME, Thienpont B, Larsen LA, Hitz MP. Correction: Integrative analysis of genomic variants reveals new associations of candidate haploinsufficient genes with congenital heart disease. PLoS Genet 2021; 17:e1009809. [PMID: 34547032 PMCID: PMC8454942 DOI: 10.1371/journal.pgen.1009809] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
[This corrects the article DOI: 10.1371/journal.pgen.1009679.].
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23
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Audain E, Wilsdon A, Breckpot J, Izarzugaza JMG, Fitzgerald TW, Kahlert AK, Sifrim A, Wünnemann F, Perez-Riverol Y, Abdul-Khaliq H, Bak M, Bassett AS, Benson WD, Berger F, Daehnert I, Devriendt K, Dittrich S, Daubeney PEF, Garg V, Hackmann K, Hoff K, Hofmann P, Dombrowsky G, Pickardt T, Bauer U, Keavney BD, Klaassen S, Kramer HH, Marshall CR, Milewicz DM, Lemaire S, Coselli JS, Mitchell ME, Tomita-Mitchell A, Prakash SK, Stamm K, Stewart AFR, Silversides CK, Siebert R, Stiller B, Rosenfeld JA, Vater I, Postma AV, Caliebe A, Brook JD, Andelfinger G, Hurles ME, Thienpont B, Larsen LA, Hitz MP. Integrative analysis of genomic variants reveals new associations of candidate haploinsufficient genes with congenital heart disease. PLoS Genet 2021; 17:e1009679. [PMID: 34324492 PMCID: PMC8354477 DOI: 10.1371/journal.pgen.1009679] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 08/10/2021] [Accepted: 06/23/2021] [Indexed: 11/18/2022] Open
Abstract
Numerous genetic studies have established a role for rare genomic variants in Congenital Heart Disease (CHD) at the copy number variation (CNV) and de novo variant (DNV) level. To identify novel haploinsufficient CHD disease genes, we performed an integrative analysis of CNVs and DNVs identified in probands with CHD including cases with sporadic thoracic aortic aneurysm. We assembled CNV data from 7,958 cases and 14,082 controls and performed a gene-wise analysis of the burden of rare genomic deletions in cases versus controls. In addition, we performed variation rate testing for DNVs identified in 2,489 parent-offspring trios. Our analysis revealed 21 genes which were significantly affected by rare CNVs and/or DNVs in probands. Fourteen of these genes have previously been associated with CHD while the remaining genes (FEZ1, MYO16, ARID1B, NALCN, WAC, KDM5B and WHSC1) have only been associated in small cases series or show new associations with CHD. In addition, a systems level analysis revealed affected protein-protein interaction networks involved in Notch signaling pathway, heart morphogenesis, DNA repair and cilia/centrosome function. Taken together, this approach highlights the importance of re-analyzing existing datasets to strengthen disease association and identify novel disease genes and pathways.
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Affiliation(s)
- Enrique Audain
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital of Schleswig-Holstein, Kiel, Germany
- German Center for Cardiovascular Research (DZHK), Kiel, Germany
| | - Anna Wilsdon
- School of Life Sciences, University of Nottingham, University Park, Nottingham, United Kingdom
| | - Jeroen Breckpot
- Centre for Human Genetics, Katholieke Universiteit Leuven, Leuven, Belgium
| | | | - Tomas W. Fitzgerald
- European Bioinformatics Institute (EMBL-EBI), Wellcome Genome Campus, Cambridge, United Kingdom
| | - Anne-Karin Kahlert
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital of Schleswig-Holstein, Kiel, Germany
- German Center for Cardiovascular Research (DZHK), Kiel, Germany
- Institute for Clinical Genetics, Faculty of Medicine Carl Gustav Carus, TU Dresden, Dresden, Germany
| | - Alejandro Sifrim
- Department of Human Genetics, University of Leuven, KU Leuven, Leuven, Belgium
- Sanger Institute-EBI Single-Cell Genomics Centre, Wellcome Trust Sanger Institute, Hinxton, United Kingdom
| | | | - Yasset Perez-Riverol
- European Molecular Biology Laboratory, European Bioinformatics Institute (EMBL-EBI), Wellcome Trust Genome Campus, Hinxton, Cambridge, United Kingdom
| | - Hashim Abdul-Khaliq
- Clinic for Pediatric Cardiology—University Hospital of Saarland, Homburg (Saar), Germany
| | - Mads Bak
- Department of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen, Denmark
- Department of Clinical Genetics, Rigshospitalet, Copenhagen University Hospital, Copenhagen, Denmark
| | - Anne S. Bassett
- Toronto Congenital Cardiac Centre for Adults, and Division of Cardiology, Department of Medicine, University Health Network, Toronto, Canada
- Department of Psychiatry, University of Toronto, Toronto, Canada
| | - Woodrow D. Benson
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Felix Berger
- Department of Congenital Heart Disease—Pediatric Cardiology, German Heart Center Berlin, Berlin, Germany
| | - Ingo Daehnert
- Department of Pediatric Cardiology and Congenital Heart Disease, Heart Center, University of Leipzig, Leipzig, Germany
| | - Koenraad Devriendt
- Centre for Human Genetics, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Sven Dittrich
- Department of Pediatric Cardiology, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nürnberg (FAU), Erlangen, Germany
| | - Piers EF Daubeney
- Division of Paediatric Cardiology, Royal Brompton Hospital, London, United Kingdom
| | - Vidu Garg
- The Heart Center, Nationwide Children’s Hospital, Columbus, Ohio, United States of America
- Department of Molecular Genetics, The Ohio State University, Columbus, Ohio, United States of America
- Center for Cardiovascular Research, Nationwide Children’s Hospital, Columbus, Ohio, United States of America
- Department of Pediatrics, The Ohio State University, Columbus, Ohio, United States of America
| | - Karl Hackmann
- Institute for Clinical Genetics, Faculty of Medicine Carl Gustav Carus, TU Dresden, Dresden, Germany
| | - Kirstin Hoff
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital of Schleswig-Holstein, Kiel, Germany
- German Center for Cardiovascular Research (DZHK), Kiel, Germany
| | - Philipp Hofmann
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital of Schleswig-Holstein, Kiel, Germany
- German Center for Cardiovascular Research (DZHK), Kiel, Germany
| | - Gregor Dombrowsky
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital of Schleswig-Holstein, Kiel, Germany
- German Center for Cardiovascular Research (DZHK), Kiel, Germany
| | - Thomas Pickardt
- Competence Network for Congenital Heart Defects, Berlin, Germany
| | - Ulrike Bauer
- Competence Network for Congenital Heart Defects, Berlin, Germany
| | - Bernard D. Keavney
- Division of Cardiovascular Sciences, School of Medical Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
- Division of Evolution & Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, Manchester, United Kingdom
| | - Sabine Klaassen
- Experimental and Clinical Research Center (ECRC), a joint cooperation between the Charité Medical Faculty and the Max-Delbrück-Center for Molecular Medicine (MDC), Berlin, Germany
- Charité—Universitätsmedizin Berlin, corporate member of Freie Universität Berlin, Humboldt-Universität zu Berlin, and Berlin Institute of Health, Department of Pediatric Cardiology, Berlin, Germany
- DZHK (German Centre for Cardiovascular Research), partner site Berlin, Berlin, Germany
| | - Hans-Heiner Kramer
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital of Schleswig-Holstein, Kiel, Germany
- German Center for Cardiovascular Research (DZHK), Kiel, Germany
| | - Christian R. Marshall
- The Centre for Applied Genomics, The Hospital for Sick Children, Toronto, Canada
- Genome Diagnostics, Department of Paediatric Laboratory Medicine, The Hospital for Sick Children, Toronto, Canada
| | - Dianna M. Milewicz
- Department of Internal Medicine, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, Texas, United States of America
| | - Scott Lemaire
- Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas, United States of America
| | - Joseph S. Coselli
- Department of Surgery, Division of Cardiothoracic Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Michael E. Mitchell
- Department of Surgery, Division of Cardiothoracic Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Aoy Tomita-Mitchell
- Department of Surgery, Division of Cardiothoracic Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Siddharth K. Prakash
- Department of Internal Medicine, McGovern Medical School, University of Texas Health Science Center at Houston, Houston, Texas, United States of America
| | - Karl Stamm
- Department of Surgery, Division of Cardiothoracic Surgery, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Alexandre F. R. Stewart
- Ruddy Canadian Cardiovascular Genetics Centre, University of Ottawa Heart Institute, Ottawa, Canada
| | - Candice K. Silversides
- Toronto Congenital Cardiac Centre for Adults, and Division of Cardiology, Department of Medicine, University Health Network, Toronto, Canada
| | - Reiner Siebert
- Institute of Human Genetics, University Hospital Ulm, Ulm, Germany
- Department of Human Genetics, University Medical Center Schleswig-Holstein (UKSH), Kiel, Germany
| | - Brigitte Stiller
- Department of Congenital Heart Disease and Pediatric Cardiology, University Heart Center Freiburg—Bad Krozingen, Freiburg, Germany
| | - Jill A. Rosenfeld
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, Wisconsin, United States of America
| | - Inga Vater
- Department of Human Genetics, University Medical Center Schleswig-Holstein (UKSH), Kiel, Germany
| | - Alex V. Postma
- Department of Medical Biology, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
- Department of Clinical Genetics, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Almuth Caliebe
- Department of Human Genetics, University Medical Center Schleswig-Holstein (UKSH), Kiel, Germany
| | - J. David Brook
- School of Life Sciences, University of Nottingham, University Park, Nottingham, United Kingdom
| | - Gregor Andelfinger
- Cardiovascular Genetics, Department of Pediatrics, Centre Hospitalier Universitaire Saint-Justine Research Centre, Université de Montréal, Montreal, Canada
| | - Matthew E. Hurles
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, United Kingdom
| | - Bernard Thienpont
- Centre for Human Genetics, Katholieke Universiteit Leuven, Leuven, Belgium
- Laboratory of Translational Genetics, Department of Human Genetics, KU Leuven, Leuven, Belgium
| | - Lars Allan Larsen
- Department of Cellular and Molecular Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Marc-Phillip Hitz
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital of Schleswig-Holstein, Kiel, Germany
- German Center for Cardiovascular Research (DZHK), Kiel, Germany
- Department of Human Genetics, University Medical Center Schleswig-Holstein (UKSH), Kiel, Germany
- Wellcome Sanger Institute, Wellcome Genome Campus, Hinxton, Cambridge, United Kingdom
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24
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Janssens P, Decuypere JP, De Rechter S, Breysem L, Van Giel D, Billen J, Hindryckx A, De Catte L, Baldewijns M, Claes K, Wissing KM, Devriendt K, Bammens B, Meyts I, Torres V, Vennekens R, Mekahli D. MO021ENHANCED MCP-1 RELEASE IN EARLY AUTOSOMAL DOMINANT POLYCYSTIC KIDNEY DISEASE. Nephrol Dial Transplant 2021. [DOI: 10.1093/ndt/gfab081.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background and Aims
Autosomal dominant polycystic kidney disease (ADPKD) is caused by mutations in either the PKD1 or PKD2 gene. While kidney failure typically occurs in adulthood, the disease starts in utero. The best change of preserving renal function long term might be the use of agents with few side effects as early as possible. For this approach, both better early prognostic stratification and novel treatment options are needed. The pediatric phase of ADPKD, while kidney function is still normal and before significant tissue destruction has occurred could be the best stage both to identify and study prognostic biomarkers as well as to identify novel targets for early treatment. Copeptin (a surrogate for vasopressin), epidermal growth factor (EGF) ( a measure for functional tubular mass) and monocyte chemoattractant protein-1 (MCP-1) ( a chemoattractant for macrophages) are associated with severity and hold prognostic value in adults but remain unstudied in the early disease stage. Kidneys from adults with ADPKD exhibit macrophage infiltration, and a prominent role of MCP-1 secretion by tubular epithelial cells is suggested from rodent models.
Method
A monocentric cross-sectional study in a tertiary referral center was performed. All consenting genotyped ADPKD patients attending the outpatient pediatric ADPKD clinic of the university hospital of Leuven and age, sex and BMI matched healthy controls were included between June and October 2017. Plasma copeptin, urinary EGF and urinary MCP-1 were evaluated. MCP-1 was studied in mouse collecting duct cells, human proximal tubular cells and fetal kidney tissue.
Results
53 genotyped ADPKD patients and 53 controls were included. Mean (SD) age was 10.4 (5.9) vs 10.5 (6.1) years (P=0.543), and eGFR 122.7 (39.8) vs 114.5 (23.1) ml/min/1.73 m2 (P= 0.177) in patients vs controls respectively. Outcome parameters in table. Plasma copeptin and EGF secretion were comparable between both groups. Median (IQR) urinary MCP-1 (pg/mg creatinine) was significantly higher in ADPKD patients (185.4 (213.8)) compared to controls (154.7 (98.0)) (P= 0.010). Human proximal tubular cells with a heterozygous PKD1 mutation and mouse collecting duct cells with a PKD1 knockout exhibited increased MCP-1 secretion triggered by fetal bovine serum. Human fetal ADPKD kidneys displayed prominent MCP-1 immunoreactivity and M2 macrophage infiltration.
Conclusion
An increase in tubular MCP-1 secretion is an early event in ADPKD, long before kidney function decline and in children with few kidney cysts. MCP-1 is a promising early disease severity marker and a potential treatment target.
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Affiliation(s)
| | | | | | | | | | - Jaak Billen
- KU Leuven, Laboratory Medicine, Leuven, Belgium
| | - An Hindryckx
- KU Leuven, Obstetrics and gynecology, Leuven, Belgium
| | - Luc De Catte
- KU Leuven, Obstetrics and gynecology, Leuven, Belgium
| | | | | | | | | | | | | | - Vicente Torres
- Mayo Clinic College of Medicine, Nephrology and Hypertension, United States of America
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25
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Lenaerts L, Brison N, Maggen C, Vancoillie L, Che H, Vandenberghe P, Dierickx D, Michaux L, Dewaele B, Neven P, Floris G, Tousseyn T, Lannoo L, Jatsenko T, Bempt IV, Van Calsteren K, Vandecaveye V, Dehaspe L, Devriendt K, Legius E, Bogaert KVD, Vermeesch JR, Amant F. Comprehensive genome-wide analysis of routine non-invasive test data allows cancer prediction: A single-center retrospective analysis of over 85,000 pregnancies. EClinicalMedicine 2021; 35:100856. [PMID: 34036251 PMCID: PMC8138727 DOI: 10.1016/j.eclinm.2021.100856] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 03/19/2021] [Accepted: 04/01/2021] [Indexed: 12/22/2022] Open
Abstract
BACKGROUND Implausible false positive results in non-invasive prenatal testing (NIPT) have been occasionally associated with the detection of occult maternal malignancies. Hence, there is a need for approaches allowing accurate prediction of whether the NIPT result is pointing to an underlying malignancy, as well as for organized programs ensuring efficient downstream clinical management of these cases. METHODS Using a data set of 88,294 NIPT performed at University Hospital Leuven (Belgium) between November 2013 and March 2020, we retrospectively evaluated the positive predictive value (PPV) of our NIPT approach for cancer detection. In this approach, whole-genome cell-free DNA (cfDNA) data from NIPT were scrutinized for the presence of (sub)chromosomal copy number alterations (CNAs) predictive for a malignancy, using an unbiased NIPT analysis pipeline coined GIPSeq. For suspected cases, the presence of a maternal cancer was evaluated via subsequent multidisciplinary clinical follow-up examinations. The cancer-specificity of the identified CNAs in cfDNA was assessed through genetic analyses of a tumor biopsy. FINDINGS Fifteen women without a cancer history were identified with a GIPSeq result suggestive of a malignant process. Their cfDNA profiles showed either genome-wide aberrations or a single trisomy 8. Upon clinical examinations, a solid or hematological cancer was identified in 4 and 7 cases, respectively. Three women were identified as having a clonal mosaicism. For one case no underlying condition was found. These numbers add to a PPV of 73%. Based on this experience, we presented a multidisciplinary care path for efficient clinical management of these cases. INTERPRETATION The presented approach for analysing NIPT results has a high PPV, yet unknown sensitivity, for detecting asymptomatic malignancies upon routine NIPT. Given the complexity of diagnosing a pregnant woman with cancer, clinical follow-up should occur in a well-designed multidisciplinary setting, such as via the care model that we presented here. FUNDING This work was supported by Research Foundation Flanders and KU Leuven funding.
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Affiliation(s)
| | - Nathalie Brison
- Center for Human Genetics, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
| | - Charlotte Maggen
- Department of Oncology, KU Leuven, Herestraat 49, Leuven, Belgium
| | - Leen Vancoillie
- Center for Human Genetics, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
| | - Huiwen Che
- Department of Human Genetics, KU Leuven, Herestraat 49, Leuven, Belgium
| | - Peter Vandenberghe
- Department of Human Genetics, KU Leuven, Herestraat 49, Leuven, Belgium
- Hematology, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
| | - Daan Dierickx
- Department of Oncology, KU Leuven, Herestraat 49, Leuven, Belgium
- Hematology, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
| | - Lucienne Michaux
- Center for Human Genetics, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
- Department of Human Genetics, KU Leuven, Herestraat 49, Leuven, Belgium
| | - Barbara Dewaele
- Center for Human Genetics, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
| | - Patrick Neven
- Department of Oncology, KU Leuven, Herestraat 49, Leuven, Belgium
- Gynaecology and Obstetrics, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
| | - Giuseppe Floris
- Pathology, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
- Department of Imaging & Pathology, KU Leuven, Herestraat 49, Leuven, Belgium
| | - Thomas Tousseyn
- Pathology, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
- Department of Imaging & Pathology, KU Leuven, Herestraat 49, Leuven, Belgium
| | - Lore Lannoo
- Gynaecology and Obstetrics, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
- Department of Department of Development and Regeneration, KU Leuven, Herestraat 49, Leuven, Belgium
| | - Tatjana Jatsenko
- Department of Human Genetics, KU Leuven, Herestraat 49, Leuven, Belgium
| | - Isabelle Vanden Bempt
- Center for Human Genetics, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
- Department of Human Genetics, KU Leuven, Herestraat 49, Leuven, Belgium
| | - Kristel Van Calsteren
- Gynaecology and Obstetrics, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
- Department of Department of Development and Regeneration, KU Leuven, Herestraat 49, Leuven, Belgium
| | - Vincent Vandecaveye
- Radiology, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
- Department of Imaging & Pathology, KU Leuven, Herestraat 49, Leuven, Belgium
| | - Luc Dehaspe
- Genomics Core facility, KU Leuven, Herestraat 49, Leuven, Belgium
| | - Koenraad Devriendt
- Center for Human Genetics, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
- Department of Human Genetics, KU Leuven, Herestraat 49, Leuven, Belgium
| | - Eric Legius
- Center for Human Genetics, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
- Department of Human Genetics, KU Leuven, Herestraat 49, Leuven, Belgium
| | - Kris Van Den Bogaert
- Center for Human Genetics, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
- Department of Human Genetics, KU Leuven, Herestraat 49, Leuven, Belgium
| | - Joris Robert Vermeesch
- Center for Human Genetics, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
- Department of Human Genetics, KU Leuven, Herestraat 49, Leuven, Belgium
- Genomics Core facility, KU Leuven, Herestraat 49, Leuven, Belgium
- Corresponding authors.
| | - Frédéric Amant
- Department of Oncology, KU Leuven, Herestraat 49, Leuven, Belgium
- Gynaecology and Obstetrics, University Hospitals Leuven, Herestraat 49, Leuven, Belgium
- Academic Medical Centers Amsterdam-University of Amsterdam and The Netherlands Cancer Institute-Antoni van Leeuwenhoek, Amsterdam, Netherlands
- Corresponding authors.
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26
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Mubungu G, Makay P, Boujemla B, Yanda S, Posey JE, Lupski JR, Bours V, Lukusa P, Devriendt K, Lumaka A. Clinical presentation and evolution of Xia-Gibbs syndrome due to p.Gly375ArgfsTer3 variant in a patient from DR Congo (Central Africa). Am J Med Genet A 2021; 185:990-994. [PMID: 33372375 PMCID: PMC9235023 DOI: 10.1002/ajmg.a.62049] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2020] [Revised: 11/22/2020] [Accepted: 12/12/2020] [Indexed: 12/26/2022]
Abstract
Xia-Gibbs syndrome (XGS) is a very rare genetic condition. The clinical spectrum is very broad and variable. The phenotype and evolution in a Congolese boy with XGS have been reported. At 6 years he had speech delay, drooling, marked hyperactivity, attention deficit, aggressive behavior, and intellectual disability. Dysmorphological evaluation revealed strabismus, mild unilateral ptosis, uplifted ear lobes, flat philtrum, thin upper lip vermillion, high arched palate, and flat feet. Patient-only whole exome sequencing identified a known pathogenic frameshift variant in the AHDC1 gene [NM_001029882.3(AHDC1):c.1122dupC;(p.Gly375ArgfsTer3)]. The clinical follow-up revealed the deterioration of his fine motor skills and significant cerebellar phenotype including tremor, pes cavus, and gait instability at the age of 12 years. This patient was compared with three previously reported patients with the same variant but did not identify a consistent pattern in the evolution of symptoms with age.
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Affiliation(s)
- Gerrye Mubungu
- Centre for Human Genetics, Faculty of Medicine, University
of Kinshasa, Kinshasa, DR, Congo
- Institut National de Recherche Biomédicale,
Kinshasa, DR, Congo
- Department of Pediatrics, Faculty of Medicine, University
of Kinshasa, Kinshasa, DR, Congo
- Centre for Human Genetics, University Hospital, University
of Leuven, Leuven, Belgium
| | - Prince Makay
- Centre for Human Genetics, Faculty of Medicine, University
of Kinshasa, Kinshasa, DR, Congo
- Institut National de Recherche Biomédicale,
Kinshasa, DR, Congo
- Department of Pediatrics, Faculty of Medicine, University
of Kinshasa, Kinshasa, DR, Congo
- Centre for Human Genetics, University Hospital, University
of Leuven, Leuven, Belgium
| | - Bouchra Boujemla
- Laboratoire de Génétique Humaine,
GIGA-Research Institute, University of Liège, Liège, Belgium
| | - Stephane Yanda
- Unit of Medical Imaging, Department of Internal medicine,
Faculty of Medicine, University of Kinshasa, Kinshasa, DR, Congo
| | - Jennifer E. Posey
- Department of Molecular and Human Genetics, Baylor College
of Medicine, Houston, Texas
| | - James R. Lupski
- Department of Molecular and Human Genetics, Baylor College
of Medicine, Houston, Texas
- Human Genome Sequencing Center, Baylor College of Medicine,
Houston, Texas
- Department of Pediatrics, Baylor College of Medicine,
Houston, Texas
- Texas Children’s Hospital, Houston, Texas
| | - Vincent Bours
- Laboratoire de Génétique Humaine,
GIGA-Research Institute, University of Liège, Liège, Belgium
| | - Prosper Lukusa
- Institut National de Recherche Biomédicale,
Kinshasa, DR, Congo
- Department of Pediatrics, Faculty of Medicine, University
of Kinshasa, Kinshasa, DR, Congo
- Centre for Human Genetics, University Hospital, University
of Leuven, Leuven, Belgium
- Laboratoire de Génétique Humaine,
GIGA-Research Institute, University of Liège, Liège, Belgium
| | - Koenraad Devriendt
- Laboratoire de Génétique Humaine,
GIGA-Research Institute, University of Liège, Liège, Belgium
| | - Aimé Lumaka
- Centre for Human Genetics, Faculty of Medicine, University
of Kinshasa, Kinshasa, DR, Congo
- Institut National de Recherche Biomédicale,
Kinshasa, DR, Congo
- Department of Pediatrics, Faculty of Medicine, University
of Kinshasa, Kinshasa, DR, Congo
- Centre for Human Genetics, University Hospital, University
of Leuven, Leuven, Belgium
- Laboratoire de Génétique Humaine,
GIGA-Research Institute, University of Liège, Liège, Belgium
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27
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Van Den Bogaert K, Lannoo L, Brison N, Gatinois V, Baetens M, Blaumeiser B, Boemer F, Bourlard L, Bours V, De Leener A, De Rademaeker M, Désir J, Dheedene A, Duquenne A, Fieremans N, Fieuw A, Gatot JS, Grisart B, Janssens K, Janssens S, Lederer D, Marichal A, Menten B, Meunier C, Palmeira L, Pichon B, Sammels E, Smits G, Sznajer Y, Vantroys E, Devriendt K, Vermeesch JR. Outcome of publicly funded nationwide first-tier noninvasive prenatal screening. Genet Med 2021; 23:1137-1142. [PMID: 33564150 DOI: 10.1038/s41436-021-01101-4] [Citation(s) in RCA: 50] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 01/07/2021] [Accepted: 01/08/2021] [Indexed: 11/09/2022] Open
Abstract
PURPOSE Noninvasive prenatal screening (NIPS) using cell-free DNA has transformed prenatal care. Belgium was the first country to implement and fully reimburse NIPS as a first-tier screening test offered to all pregnant women. A consortium consisting of all Belgian genetic centers report the outcome of two years genome-wide NIPS implementation. METHODS The performance for the common trisomies and for secondary findings was evaluated based on 153,575 genome-wide NIP tests. Furthermore, the evolution of the number of invasive tests and the incidence of Down syndrome live births was registered. RESULTS Trisomies 21, 18, and 13 were detected in respectively 0.32%, 0.07%, and 0.06% of cases, with overall positive predictive values (PPVs) of 92.4%, 84.6%, and 43.9%. Rare autosomal trisomies and fetal segmental imbalances were detected in respectively 0.23% and 0.07% of cases with PPVs of 4.1% and 47%. The number of invasive obstetric procedures decreased by 52%. The number of trisomy 21 live births dropped to 0.04%. CONCLUSION Expanding the scope of NIPS beyond trisomy 21 fetal screening allows the implementation of personalized genomic medicine for the obstetric population. This genome-wide NIPS approach has been embedded successfully in prenatal genetic care in Belgium and might serve as a framework for other countries offering NIPS.
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Affiliation(s)
- Kris Van Den Bogaert
- Center for Human Genetics, University Hospitals Leuven-KU Leuven, Leuven, Belgium
| | - Lore Lannoo
- Department of Obstetrics and Gynaecology, University Hospitals Leuven, Leuven, Belgium
| | - Nathalie Brison
- Center for Human Genetics, University Hospitals Leuven-KU Leuven, Leuven, Belgium
| | - Vincent Gatinois
- Center for Human Genetics, University Hospitals Leuven-KU Leuven, Leuven, Belgium
| | - Machteld Baetens
- Center for Medical Genetics, University Hospital Ghent, Ghent, Belgium
| | - Bettina Blaumeiser
- Center for Medical Genetics, Universiteit Antwerpen, Antwerp, Belgium.,Center for Medical Genetics, University Hospital Antwerp, Edegem, Belgium
| | - François Boemer
- Center for Medical Genetics, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Laura Bourlard
- Center for Human Genetics, Université Libre de Bruxelles, Brussels, Belgium
| | - Vincent Bours
- Center for Medical Genetics, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Anne De Leener
- Center for Human Genetics, Université Catholique de Louvain, Brussels, Belgium
| | | | - Julie Désir
- Center for Human Genetics, Université Libre de Bruxelles, Brussels, Belgium.,Center for Medical Genetics, Institut de Pathologie et de Génétique Gosselies, Charleroi, Belgium
| | - Annelies Dheedene
- Center for Medical Genetics, University Hospital Ghent, Ghent, Belgium
| | - Armelle Duquenne
- Center for Human Genetics, Université Catholique de Louvain, Brussels, Belgium
| | - Nathalie Fieremans
- Center for Medical Genetics, Vrije Universiteit Brussel, Brussels, Belgium
| | - Annelies Fieuw
- Center for Medical Genetics, Vrije Universiteit Brussel, Brussels, Belgium
| | - Jean-Stéphane Gatot
- Center for Medical Genetics, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Bernard Grisart
- Center for Medical Genetics, Institut de Pathologie et de Génétique Gosselies, Charleroi, Belgium
| | - Katrien Janssens
- Center for Medical Genetics, Universiteit Antwerpen, Antwerp, Belgium
| | - Sandra Janssens
- Center for Medical Genetics, University Hospital Ghent, Ghent, Belgium
| | - Damien Lederer
- Center for Medical Genetics, Institut de Pathologie et de Génétique Gosselies, Charleroi, Belgium
| | - Axel Marichal
- Center for Medical Genetics, Institut de Pathologie et de Génétique Gosselies, Charleroi, Belgium
| | - Björn Menten
- Center for Medical Genetics, University Hospital Ghent, Ghent, Belgium
| | - Colombine Meunier
- Center for Medical Genetics, Institut de Pathologie et de Génétique Gosselies, Charleroi, Belgium
| | - Leonor Palmeira
- Center for Medical Genetics, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Bruno Pichon
- Center for Human Genetics, Université Libre de Bruxelles, Brussels, Belgium
| | - Eva Sammels
- Center for Medical Genetics, Vrije Universiteit Brussel, Brussels, Belgium
| | - Guillaume Smits
- Center for Human Genetics, Université Libre de Bruxelles, Brussels, Belgium
| | - Yves Sznajer
- Center for Human Genetics, Université Catholique de Louvain, Brussels, Belgium
| | - Elise Vantroys
- Center for Medical Genetics, Vrije Universiteit Brussel, Brussels, Belgium
| | - Koenraad Devriendt
- Center for Human Genetics, University Hospitals Leuven-KU Leuven, Leuven, Belgium
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28
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Russo FM, Debeer A, De Coppi P, Devriendt K, Crombag N, Hubble T, Power B, Benachi A, Deprest J. What should we tell parents? Congenital diaphragmatic hernia. Prenat Diagn 2020; 42:398-407. [PMID: 33599313 DOI: 10.1002/pd.5880] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 10/13/2020] [Accepted: 11/30/2020] [Indexed: 12/18/2022]
Abstract
Congenital diaphragmatic hernia (CDH) is characterized by a defect in the muscle dividing the thoracic and abdominal cavities. This leads to herniation of the abdominal organs into the thorax and a disturbance of lung development. Two-thirds of cases are identified by prenatal ultrasound in the second trimester, which should prompt referral to a tertiary center for prognosis assessment and counseling by a multidisciplinary team familiar with this condition. In this review, we summarize evidence on prenatal diagnosis and postnatal management of CDH. There is a focus on information that should be provided to expecting parents during prenatal counseling.
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Affiliation(s)
- Francesca M Russo
- Clinical Department of Obstetrics and Gynaecology, University Hospitals Leuven, Leuven, Belgium.,Academic Department of Development and Regeneration, Cluster Woman and Child, KU Leuven, Leuven, Belgium
| | - Anne Debeer
- Academic Department of Development and Regeneration, Cluster Woman and Child, KU Leuven, Leuven, Belgium.,Neonatal Intensive Care Unit, University Hospitals Leuven, Leuven, Belgium
| | - Paolo De Coppi
- Neonatal and Paediatric Surgery Unit, Great Ormond Street Hospital, London, UK.,Stem Cells & Regenerative Medicine Section, NIHR Biomedical Research Center, UCL Great Ormond Street Institute of Child Health, London, UK
| | | | - Neeltje Crombag
- Academic Department of Development and Regeneration, Cluster Woman and Child, KU Leuven, Leuven, Belgium
| | - Talia Hubble
- Academic Department of Development and Regeneration, Cluster Woman and Child, KU Leuven, Leuven, Belgium.,Medical Sciences Division, University of Oxford, Oxford, UK
| | | | - Alexandra Benachi
- Department of Obstetrics and Gynecology, Hôpital Antoine Béclère, AP-HP, Université Paris Saclay, Clamart, France.,Centre Référence Maladie Rare: Hernie de Coupole Diaphragmatique, Clamart, France
| | - Jan Deprest
- Clinical Department of Obstetrics and Gynaecology, University Hospitals Leuven, Leuven, Belgium.,Academic Department of Development and Regeneration, Cluster Woman and Child, KU Leuven, Leuven, Belgium.,Institute for Women's Health, University College London, London, UK
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29
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Robyns T, Willems R, Van Cleemput J, Jhangiani S, Muzny D, Gibbs R, Lupski JR, Breckpot J, Devriendt K, Corveleyn A. Whole exome sequencing in a large pedigree with DCM identifies a novel mutation in RBM20. Acta Cardiol 2020; 75:748-753. [PMID: 31583969 DOI: 10.1080/00015385.2019.1674490] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Background: Familial dilated cardiomyopathy (DCM) is genetically heterogeneous and is associated with mutations in at least 40 different genes. Apart from TTN encoding the giant protein Titin, none of these genes have an expected diagnostic yield of more than 5% complicating genetic diagnosis. Whole exome sequencing (WES) is a powerful alternative for the identification of the causal gene, however variant interpretation remains challenging. We report on WES in a large family with autosomal dominant DCM complicated by end stage heart failure and non-sustained ventricular arrhythmias in whom no causative mutation was identified using a targeted gene panel including 28 genes.Methods and results: WES was applied on 2 affected cousins. Stringent filtering of the identified genetic variants was performed including population variant frequencies, in silico analysis, orthologous and paralogous conservation. Subsequently Sanger sequencing was performed for 10 potential disease causing variants in order to confirm the presence of the variant and to evaluate co-segregation. Only one variant in exon 9 of the RBM20 gene (c.2714T > A, p.Met950Lys, NM_001334363) showed full co-segregation in the 7 affected family members resulting in a maximum 2-point LOD score of 2.1 and suggesting this as the pathogenic mutation responsible for the phenotype. Recently mutations in RBM20 have been linked to arrhythmogenic dilated cardiomyopathy caused by defective splicing of the giant sarcomere protein titin and abnormal calcium handling.Conclusions: We report the identification of a novel mutation in RBM20 by WES in a large pedigree with DCM.
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Affiliation(s)
- Tomas Robyns
- Department of Cardiovascular Diseases, University Hospitals Leuven, Leuven, Belgium
- Department of Cardiovascular Sciences, University of Leuven, Leuven, Belgium
| | - Rik Willems
- Department of Cardiovascular Diseases, University Hospitals Leuven, Leuven, Belgium
- Department of Cardiovascular Sciences, University of Leuven, Leuven, Belgium
| | - Johan Van Cleemput
- Department of Cardiovascular Diseases, University Hospitals Leuven, Leuven, Belgium
- Department of Cardiovascular Sciences, University of Leuven, Leuven, Belgium
| | - Shalini Jhangiani
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Donna Muzny
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Richard Gibbs
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - James R. Lupski
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
| | - Jeroen Breckpot
- Department of Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Koenraad Devriendt
- Department of Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Anniek Corveleyn
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, TX, USA
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30
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Peeters S, Declerck K, Thomas M, Boudin E, Beckers D, Chivu O, Heinrichs C, Devriendt K, de Zegher F, Van Hul W, Vanden Berghe W, De Schepper J, Rooman R, Mortier G. DNA Methylation Profiling and Genomic Analysis in 20 Children with Short Stature Who Were Born Small for Gestational Age. J Clin Endocrinol Metab 2020; 105:5873625. [PMID: 32685970 DOI: 10.1210/clinem/dgaa465] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Accepted: 07/15/2020] [Indexed: 12/30/2022]
Abstract
PURPOSE In a significant proportion of children born small for gestational age (SGA) with failure of catch-up growth, the etiology of short stature remains unclear after routine diagnostic workup. We wanted to investigate if extensive analysis of the (epi)genome can unravel the cause of growth failure in a significant portion of these children. PATIENTS AND METHODS Twenty SGA children treated with GH because of short stature were selected from the BELGROW database of the Belgian Society for Pediatric Endocrinology and Diabetology for exome sequencing, single-nucleotide polymorphism (SNP) array and genome-wide methylation analysis to identify the (epi)genetic cause. First-year response to GH was compared with the response of SGA patients in the KIGS database. RESULTS We identified (likely) pathogenic variants in 4 children (from 3 families) using exome sequencing and found pathogenic copy number variants in 2 probands using SNP array. In a child harboring a NSD1-containing microduplication, we identified a DNA methylation signature that is opposite to the genome-wide DNA methylation signature of Sotos syndrome. Moreover, we observed multilocus imprinting disturbances in 2 children in whom no other genomic alteration could be identified. Five of 6 children with a genetic diagnosis had an "above average" response to GH. CONCLUSIONS The study indicates that a more advanced approach with deep genotyping can unravel unexpected (epi)genomic alterations in SGA children with persistent growth failure. Most SGA children with a genetic diagnosis had a good response to GH treatment.
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Affiliation(s)
- Silke Peeters
- Department of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
| | - Ken Declerck
- Laboratory of Protein Chemistry, Proteomics and Epigenetic Signalling (PPES), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Muriel Thomas
- Belgian Society for Pediatric Endocrinology and Diabetology, Brussels, Belgium
| | - Eveline Boudin
- Department of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
| | - Dominique Beckers
- Unité d'Endocrinologie Pédiatrique, CHU Namur, Université catholique de Louvain, Yvoir, Belgium and Department of Pediatrics, University Hospital Leuven, Leuven, Belgium
| | - Olimpia Chivu
- Department of Pediatrics, Clinique de l'Espérance, Saint-Nicolas, Belgium
| | - Claudine Heinrichs
- Paediatric Endocrinology Unit, Hôpital Universitaire des Enfants Reine Fabiola (HUDERF), Brussels, Belgium
| | - Koenraad Devriendt
- Center for Human Genetics, University of Leuven and the University Hospital Leuven, Leuven, Belgium
| | - Francis de Zegher
- Department of Development & Regeneration, University of Leuven, Leuven, Belgium
| | - Wim Van Hul
- Department of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
| | - Wim Vanden Berghe
- Laboratory of Protein Chemistry, Proteomics and Epigenetic Signalling (PPES), Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Jean De Schepper
- Department of Pediatrics, Vrije Universiteit Brussel, Universitair Ziekenhuis Brussel, Brussels, Belgium and Department of Pediatrics, Universitair Ziekenhuis Gent, Ghent, Belgium
| | | | - Geert Mortier
- Department of Medical Genetics, University of Antwerp and Antwerp University Hospital, Antwerp, Belgium
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31
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Mubungu G, Makay P, Lumaka A, Mvuama N, Tshika D, Tady BP, Biselele T, Roelants M, Tshilobo PL, Devriendt K. Dysmorphism and major anomalies are a main predictor of survival in newborns admitted to the neonatal intensive care unit in the Democratic Republic of Congo. Am J Med Genet A 2020; 185:453-460. [PMID: 33247552 DOI: 10.1002/ajmg.a.61987] [Citation(s) in RCA: 1] [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: 07/15/2020] [Revised: 10/24/2020] [Accepted: 11/07/2020] [Indexed: 11/10/2022]
Abstract
In Central-Africa, neonatal infections, asphyxia and prematurity are main reasons for admission to the neonatal intensive care unit and major determinants of newborn survival. Also, the outcome of newborns with congenital anomalies is expected to be poor, due to a lack of state-of-the art care. We conducted a study of 102 newborns recruited in the Neonatal Intensive Care Unit (NICU) at the University Hospitals of Kinshasa, DR Congo, to assess the impact of congenital anomalies. The presence of a major anomaly was associated with a hazard ratio of death of 13.2 (95%CI: 3.7-46.7, p < .001). In addition, the presence of three or more minor anomalies was associated with a 4.5-fold increased risk of death (95%CI: 1.1-18.6, p = .04). We conclude that like major anomalies, the presence of three or more minor anomalies should also be given particular attention and that the evaluation of dysmorphism should be promoted in NICU.
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Affiliation(s)
- Gerrye Mubungu
- Faculty of Medicine, Center for Human Genetics, University of Kinshasa, Kinshasa, Congo.,Faculty of Medicine, Department of Pediatrics, University of Kinshasa, Kinshasa, Congo.,Center for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
| | - Prince Makay
- Faculty of Medicine, Center for Human Genetics, University of Kinshasa, Kinshasa, Congo.,Faculty of Medicine, Department of Pediatrics, University of Kinshasa, Kinshasa, Congo
| | - Aimé Lumaka
- Faculty of Medicine, Center for Human Genetics, University of Kinshasa, Kinshasa, Congo.,Faculty of Medicine, Department of Pediatrics, University of Kinshasa, Kinshasa, Congo.,Département des Sciences Biomédicales et Précliniques, GIGA-R, Laboratoire de Génétique Humaine, University of Liège, Liège, Belgium.,Institut National de Recherche Biomédicale, Kinshasa, Kinshasa, Congo
| | - Nono Mvuama
- Faculty of Medicine, Kinshasa School of Public Health, University of Kinshasa, Kinshasa, Congo
| | - Dahlie Tshika
- Faculty of Medicine, Center for Human Genetics, University of Kinshasa, Kinshasa, Congo.,Faculty of Medicine, Department of Pediatrics, University of Kinshasa, Kinshasa, Congo
| | - Bruno-Paul Tady
- Faculty of Medicine, Department of Pediatrics, University of Kinshasa, Kinshasa, Congo
| | - Thérèse Biselele
- Faculty of Medicine, Department of Pediatrics, University of Kinshasa, Kinshasa, Congo
| | - Mathieu Roelants
- Department of Public Health and Primary Care, Environment and Health, KU Leuven-University of Leuven, Leuven, Belgium
| | - Prosper Lukusa Tshilobo
- Faculty of Medicine, Center for Human Genetics, University of Kinshasa, Kinshasa, Congo.,Faculty of Medicine, Department of Pediatrics, University of Kinshasa, Kinshasa, Congo.,Center for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium.,Institut National de Recherche Biomédicale, Kinshasa, Kinshasa, Congo
| | - Koenraad Devriendt
- Center for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
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32
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Delvallée C, Nicaise S, Antin M, Leuvrey AS, Nourisson E, Leitch CC, Kellaris G, Stoetzel C, Geoffroy V, Scheidecker S, Keren B, Depienne C, Klar J, Dahl N, Deleuze JF, Génin E, Redon R, Demurger F, Devriendt K, Mathieu-Dramard M, Poitou-Bernert C, Odent S, Katsanis N, Mandel JL, Davis EE, Dollfus H, Muller J. A BBS1 SVA F retrotransposon insertion is a frequent cause of Bardet-Biedl syndrome. Clin Genet 2020; 99:318-324. [PMID: 33169370 DOI: 10.1111/cge.13878] [Citation(s) in RCA: 15] [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: 09/29/2020] [Revised: 11/04/2020] [Accepted: 11/06/2020] [Indexed: 12/11/2022]
Abstract
Bardet-Biedl syndrome (BBS) is a ciliopathy characterized by retinitis pigmentosa, obesity, polydactyly, cognitive impairment and renal failure. Pathogenic variants in 24 genes account for the molecular basis of >80% of cases. Toward saturated discovery of the mutational basis of the disorder, we carefully explored our cohorts and identified a hominid-specific SINE-R/VNTR/Alu type F (SVA-F) insertion in exon 13 of BBS1 in eight families. In six families, the repeat insertion was found in trans with c.1169 T > G, p.Met390Arg and in two families the insertion was found in addition to other recessive BBS loci. Whole genome sequencing, de novo assembly and SNP array analysis were performed to characterize the genomic event. This insertion is extremely rare in the general population (found in 8 alleles of 8 BBS cases but not in >10 800 control individuals from gnomAD-SV) and due to a founder effect. Its 2435 bp sequence contains hallmarks of LINE1 mediated retrotransposition. Functional studies with patient-derived cell lines confirmed that the BBS1 SVA-F is deleterious as evidenced by a significant depletion of both mRNA and protein levels. Such findings highlight the importance of dedicated bioinformatics pipelines to identify all types of variation.
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Affiliation(s)
- Clarisse Delvallée
- Laboratoire de Génétique Médicale, Institut de génétique médicale d'Alsace IGMA, INSERM U1112, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg UMRS_1112, Strasbourg, France
| | - Samuel Nicaise
- Laboratoire de Génétique Médicale, Institut de génétique médicale d'Alsace IGMA, INSERM U1112, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg UMRS_1112, Strasbourg, France
| | - Manuela Antin
- Laboratoires de Diagnostic Génétique, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Anne-Sophie Leuvrey
- Laboratoires de Diagnostic Génétique, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Elsa Nourisson
- Laboratoires de Diagnostic Génétique, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Carmen C Leitch
- Advanced Center for Translational and Genetic Medicine (ACT-GeM), Stanley Manne Children's Research Institute, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA
| | - Georgios Kellaris
- Advanced Center for Translational and Genetic Medicine (ACT-GeM), Stanley Manne Children's Research Institute, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA
| | - Corinne Stoetzel
- Laboratoire de Génétique Médicale, Institut de génétique médicale d'Alsace IGMA, INSERM U1112, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg UMRS_1112, Strasbourg, France
| | - Véronique Geoffroy
- Laboratoire de Génétique Médicale, Institut de génétique médicale d'Alsace IGMA, INSERM U1112, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg UMRS_1112, Strasbourg, France
| | - Sophie Scheidecker
- Laboratoire de Génétique Médicale, Institut de génétique médicale d'Alsace IGMA, INSERM U1112, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg UMRS_1112, Strasbourg, France.,Laboratoires de Diagnostic Génétique, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Boris Keren
- Institut du Cerveau et de la Moelle épinière (ICM), Sorbonne Université, Paris, France.,AP-HP, Hôpital de la Pitié-Salpêtrière, Département de Génétique, Paris, France
| | - Christel Depienne
- Institut du Cerveau et de la Moelle épinière (ICM), Sorbonne Université, Paris, France.,Institute of Human Genetics, University Hospital Essen, University of Duisburg-Essen, Essen, Germany
| | - Joakim Klar
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Niklas Dahl
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Jean-François Deleuze
- Centre National de Recherche en Génomique Humaine (CNRGH), Institut de biologie François Jacob, Evry, France
| | | | - Richard Redon
- Université de Nantes, CNRS, INSERM, l'institut du thorax, Nantes, France
| | - Florence Demurger
- Service de Génétique Médicale, Centre Hospitalier Bretagne Atlantique, Vannes, France
| | - Koenraad Devriendt
- Center for Human Genetics, University Hospital Leuven and KU Leuven, Leuven, Belgium
| | | | - Christine Poitou-Bernert
- Assistance Publique Hôpitaux de Paris, Nutrition Department Pitié-Salpêtrière Hospital; Sorbonne Université, INSERM, NutriOmics Research Unit, Paris, France
| | - Sylvie Odent
- Centre de Référence Maladies Rares CLAD-Ouest, Service de Génétique Clinique, CHU Rennes, Rennes, France.,CNRS, IGDR (Institut de Génétique et Développement de Rennes) UMR 6290, Université de Rennes, Rennes, France
| | - Nicholas Katsanis
- Advanced Center for Translational and Genetic Medicine (ACT-GeM), Stanley Manne Children's Research Institute, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA.,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Jean-Louis Mandel
- Laboratoires de Diagnostic Génétique, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.,Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS UMR 7104, INSERM U964, Université de Strasbourg, Dept Transl Med and Neurogenetics Illkirch, France
| | - Erica E Davis
- Advanced Center for Translational and Genetic Medicine (ACT-GeM), Stanley Manne Children's Research Institute, Ann and Robert H. Lurie Children's Hospital of Chicago, Chicago, Illinois, USA.,Department of Pediatrics, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - Hélène Dollfus
- Laboratoire de Génétique Médicale, Institut de génétique médicale d'Alsace IGMA, INSERM U1112, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg UMRS_1112, Strasbourg, France.,Service de Génétique Médicale, Hôpitaux Universitaires de Strasbourg, Strasbourg, France.,Filière SENSGENE, Centre de Référence pour les affections rares en génétique ophtalmologique, CARGO, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
| | - Jean Muller
- Laboratoire de Génétique Médicale, Institut de génétique médicale d'Alsace IGMA, INSERM U1112, Fédération de Médecine Translationnelle de Strasbourg (FMTS), Université de Strasbourg UMRS_1112, Strasbourg, France.,Laboratoires de Diagnostic Génétique, Hôpitaux Universitaires de Strasbourg, Strasbourg, France
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33
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Lenaerts L, Reynhout S, Verbinnen I, Laumonnier F, Toutain A, Bonnet-Brilhault F, Hoorne Y, Joss S, Chassevent AK, Smith-Hicks C, Loeys B, Joset P, Steindl K, Rauch A, Mehta SG, Chung WK, Devriendt K, Holder SE, Jewett T, Baldwin LM, Wilson WG, Towner S, Srivastava S, Johnson HF, Daumer-Haas C, Baethmann M, Ruiz A, Gabau E, Jain V, Varghese V, Al-Beshri A, Fulton S, Wechsberg O, Orenstein N, Prescott K, Childs AM, Faivre L, Moutton S, Sullivan JA, Shashi V, Koudijs SM, Heijligers M, Kivuva E, McTague A, Male A, van Ierland Y, Plecko B, Maystadt I, Hamid R, Hannig VL, Houge G, Janssens V. The broad phenotypic spectrum of PPP2R1A-related neurodevelopmental disorders correlates with the degree of biochemical dysfunction. Genet Med 2020; 23:352-362. [PMID: 33106617 PMCID: PMC7862067 DOI: 10.1038/s41436-020-00981-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [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: 06/09/2020] [Revised: 09/15/2020] [Accepted: 09/17/2020] [Indexed: 12/31/2022] Open
Abstract
Purpose Neurodevelopmental disorders (NDD) caused by protein phosphatase 2A (PP2A) dysfunction have mainly been associated with de novo variants in PPP2R5D and PPP2CA, and more rarely in PPP2R1A. Here, we aimed to better understand the latter by characterizing 30 individuals with de novo and often recurrent variants in this PP2A scaffolding Aα subunit. Methods Most cases were identified through routine clinical diagnostics. Variants were biochemically characterized for phosphatase activity and interaction with other PP2A subunits. Results We describe 30 individuals with 16 different variants in PPP2R1A, 21 of whom had variants not previously reported. The severity of developmental delay ranged from mild learning problems to severe intellectual disability (ID) with or without epilepsy. Common features were language delay, hypotonia, and hypermobile joints. Macrocephaly was only seen in individuals without B55α subunit-binding deficit, and these patients had less severe ID and no seizures. Biochemically more disruptive variants with impaired B55α but increased striatin binding were associated with profound ID, epilepsy, corpus callosum hypoplasia, and sometimes microcephaly. Conclusion We significantly expand the phenotypic spectrum of PPP2R1A-related NDD, revealing a broader clinical presentation of the patients and that the functional consequences of the variants are more diverse than previously reported.
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Affiliation(s)
- Lisa Lenaerts
- Laboratory of Protein Phosphorylation & Proteomics, Department of Cellular & Molecular Medicine, University of Leuven (KU Leuven), Leuven, Belgium
| | - Sara Reynhout
- Laboratory of Protein Phosphorylation & Proteomics, Department of Cellular & Molecular Medicine, University of Leuven (KU Leuven), Leuven, Belgium.,KU Leuven Brain Institute (LBI), Leuven, Belgium
| | - Iris Verbinnen
- Laboratory of Protein Phosphorylation & Proteomics, Department of Cellular & Molecular Medicine, University of Leuven (KU Leuven), Leuven, Belgium
| | - Frédéric Laumonnier
- UMR1253, iBrain, University of Tours, INSERM, Tours, France.,Service de Génétique, Centre Hospitalier Régional Universitaire, Tours, France
| | - Annick Toutain
- UMR1253, iBrain, University of Tours, INSERM, Tours, France.,Service de Génétique, Centre Hospitalier Régional Universitaire, Tours, France
| | - Frédérique Bonnet-Brilhault
- UMR1253, iBrain, University of Tours, INSERM, Tours, France.,Excellence Center in Autism and Neurodevelopmental Disorders, Centre Hospitalier Régional Universitaire, Tours, France
| | - Yana Hoorne
- Laboratory of Protein Phosphorylation & Proteomics, Department of Cellular & Molecular Medicine, University of Leuven (KU Leuven), Leuven, Belgium
| | - Shelagh Joss
- West of Scotland Centre for Genomic Medicine, Queen Elizabeth University Hospital, Glasgow, UK
| | | | | | - Bart Loeys
- Center for Medical Genetics, University of Antwerp/Antwerp University Hospital, Antwerp, Belgium
| | - Pascal Joset
- Institute of Medical Genetics, University of Zurich, Schlieren, Zurich, Switzerland
| | - Katharina Steindl
- Institute of Medical Genetics, University of Zurich, Schlieren, Zurich, Switzerland
| | - Anita Rauch
- Institute of Medical Genetics, University of Zurich, Schlieren, Zurich, Switzerland
| | - Sarju G Mehta
- East Anglian Regional Medical Genetics Service, Addenbrookes Hospital, Cambridge, UK
| | - Wendy K Chung
- Columbia University Medical Center, New York, NY, USA
| | - Koenraad Devriendt
- Department of Human Genetics, University of Leuven (KU Leuven), Leuven, Belgium
| | - Susan E Holder
- North West Thames Regional Genetics Service, Harrow, London, UK
| | - Tamison Jewett
- Wake Forest School of Medicine, Wake Forest University, Winston-Salem, NC, USA
| | - Lauren M Baldwin
- Wake Forest School of Medicine, Wake Forest University, Winston-Salem, NC, USA
| | - William G Wilson
- Department of Pediatrics, University of Virginia, Charlottesville, VA, USA
| | - Shelley Towner
- Department of Pediatrics, University of Virginia, Charlottesville, VA, USA
| | | | - Hannah F Johnson
- Department of Neurology, Boston Children's Hospital, Boston, MA, USA
| | | | - Martina Baethmann
- Pediatric Neurology, Sozialpädiatrisches Zentrum, Klinikum Dritter Orden München, Munich, Germany
| | - Anna Ruiz
- Genetics Laboratory, UDIAT-Centre Diagnòstic, Parc Taulí Hospital Universitari, Institut d'Investigació i Innovació Parc Taulí I3PT, Universitat Autònoma de Barcelona, Sabadell, Spain
| | - Elisabeth Gabau
- Paediatric Unit, Parc Taulí Hospital Universitari, Institut d'Investigació i Innovació Parc taulí I3PT, Universitat Autònoma de Barcelona, Sabadell, Spain
| | - Vani Jain
- All Wales Medical Genomics Service, University Hospital of Wales, Cardiff, UK
| | - Vinod Varghese
- All Wales Medical Genomics Service, University Hospital of Wales, Cardiff, UK
| | - Ali Al-Beshri
- Internal Medicine & Medical Genetics, University of Alabama at Birmingham, Birmingham, AL, USA
| | | | - Oded Wechsberg
- Pediatric Genetics Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Maccabi Healthcare Services, Tel Aviv, Israel
| | - Naama Orenstein
- Pediatric Genetics Unit, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Katrina Prescott
- Yorkshire Regional Genetics Department, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Anne-Marie Childs
- Department of Neurology, Leeds Teaching Hospitals NHS Trust, Leeds, UK
| | - Laurence Faivre
- Centre de référence Anomalies du Développement et Syndromes malformatifs, FHU TRANSLAD, UMR1231 GAD, CHU Dijon et Université de Bourgogne, Dijon, France
| | - Sébastien Moutton
- CPDPN, Pôle mère enfant, Maison de Santé Bordeaux Bagatelle, Talence, France
| | - Jennifer A Sullivan
- Department of Pediatrics, Division of Medical Genetics, Duke University Medical Center, Durham, NC, USA
| | - Vandana Shashi
- Department of Pediatrics, Division of Medical Genetics, Duke University Medical Center, Durham, NC, USA
| | | | - Malou Heijligers
- Department of Clinical Genetics, Maastricht UMC+, Maastricht, The Netherlands
| | - Emma Kivuva
- Royal Devon & Exeter NHS Foundation Trust, Exeter, UK
| | - Amy McTague
- Developmental Neurosciences, UCL Great Ormond Street Institute of Child Health, London, UK.,Department of Neurology, Great Ormond Street Hospital, London, UK
| | - Alison Male
- Developmental Neurosciences, UCL Great Ormond Street Institute of Child Health, London, UK.,Department of Neurology, Great Ormond Street Hospital, London, UK
| | | | - Barbara Plecko
- Division of General Pediatrics, Department of Pediatrics and Adolescent Medicine, Medical University of Graz, Graz, Austria
| | - Isabelle Maystadt
- Centre de Génétique Humaine, Institut de Pathologie et de Génétique, Gosselies, Belgium
| | - Rizwan Hamid
- Vanderbilt University Medical Center, Nashville, TN, USA
| | | | - Gunnar Houge
- Department of Medical Genetics, Haukeland University Hospital, Bergen, Norway.
| | - Veerle Janssens
- Laboratory of Protein Phosphorylation & Proteomics, Department of Cellular & Molecular Medicine, University of Leuven (KU Leuven), Leuven, Belgium. .,KU Leuven Brain Institute (LBI), Leuven, Belgium.
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34
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Roelandt MA, Devriendt K, de Llano-Pérula MC, Raes M, Willems G, Verdonck A. Dental and Craniofacial Characteristics in Patients With 14Q22.1-Q22.2 Deletion: A Case Series. Cleft Palate Craniofac J 2020; 58:505-513. [PMID: 33063524 DOI: 10.1177/1055665620954090] [Citation(s) in RCA: 1] [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] [Indexed: 11/15/2022] Open
Abstract
This case series is a follow-up report focusing on dental and facial characteristics in patients with a rare microdeletion in chromosome 14q22.1-q22.2. Usually, these patients have severe ocular, brain, and digital abnormalities. However, this case series shows that clinical presentation can be mild. Four relatives spanning 3 generations were diagnosed with a familial autosomal dominant 2.79 Mb microdeletion in chromosome 14q22.1-q22.2. Genetic screening was done by the Bacterial Artificial Chromosome array-comparative genome hybridization and was confirmed by the fluorescence in situ hybridization technique. Dental and craniofacial data were collected from medical files, clinical examinations, clinical photos, panoramic and cephalometric radiographs, and dental casts. Written informed consent for scientific use was obtained for all family members. No larger syndrome could be identified. All cases had similar facial red flag characteristics, consisting of a long face with retrognathia and open mouth relation, associated oral clefts in varying degrees, depressed nasal bridge, delayed tooth development, hypertelorism, and low-set angular ears. The dental casts showed a distal molar occlusion and a lack of space in the dental arches. Developmental delay was noted together with limb defects such as poly- and syndactyly. Microphthalmia and hearing loss were present in the most severe cases. This rare congenital disorder, associated with facial dysmorphia, oral clefts, and tooth agenesis, can remain undiagnosed until adulthood. A family history of short stature, developmental delay, poly- or syndactyly, and micropthalmia are suggestive features. Similar reports help to raise awareness among dental practitioners, leading to an early genetic diagnosis.
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Affiliation(s)
- Marie Anne Roelandt
- Department of Oral Health Sciences-Orthodontics, 60182KU Leuven and Dentistry, University Hospitals Leuven, Leuven, Belgium
| | | | - Maria Cadenas de Llano-Pérula
- Department of Oral Health Sciences-Orthodontics, 60182KU Leuven and Dentistry, University Hospitals Leuven, Leuven, Belgium
| | - Margot Raes
- Department of Oral Health Sciences-Orthodontics, 60182KU Leuven and Dentistry, University Hospitals Leuven, Leuven, Belgium
| | - Guy Willems
- Department of Oral Health Sciences-Orthodontics, 60182KU Leuven and Dentistry, University Hospitals Leuven, Leuven, Belgium
| | - Anna Verdonck
- Department of Oral Health Sciences-Orthodontics, 60182KU Leuven and Dentistry, University Hospitals Leuven, Leuven, Belgium.,Multidisciplinary Cleft Lip and Palate Team, University Hospitals Leuven, Leuven, Belgium
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35
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Van Elslande J, Brison N, Vermeesch JR, Devriendt K, Van Den Bogaert K, Legius E, Van Ranst M, Vermeersch P, Billen J. The sudden death of the combined first trimester aneuploidy screening, a single centre experience in Belgium. Clin Chem Lab Med 2020; 57:e294-e297. [PMID: 31112505 DOI: 10.1515/cclm-2019-0231] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 04/04/2019] [Indexed: 11/15/2022]
Affiliation(s)
- Jan Van Elslande
- Clinical Department of Laboratory Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Nathalie Brison
- Centre for Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Joris R Vermeesch
- Centre for Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | | | | | - Eric Legius
- Centre for Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Marc Van Ranst
- Laboratory of Clinical and Epidemiological Virology, Department of Microbiology and Immunology, University of Leuven, Leuven, Belgium
| | - Pieter Vermeersch
- Clinical Department of Laboratory Medicine, University Hospitals Leuven, Leuven, Belgium
| | - Jaak Billen
- Clinical Department of Laboratory Medicine, University Hospitals Leuven, Herestraat 49, 3000 Leuven, Belgium, Phone: 003216347015, Fax: 003216347931
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36
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Mak CCY, Doherty D, Lin AE, Vegas N, Cho MT, Viot G, Dimartino C, Weisfeld-Adams JD, Lessel D, Joss S, Li C, Gonzaga-Jauregui C, Zarate YA, Ehmke N, Horn D, Troyer C, Kant SG, Lee Y, Ishak GE, Leung G, Barone Pritchard A, Yang S, Bend EG, Filippini F, Roadhouse C, Lebrun N, Mehaffey MG, Martin PM, Apple B, Millan F, Puk O, Hoffer MJV, Henderson LB, McGowan R, Wentzensen IM, Pei S, Zahir FR, Yu M, Gibson WT, Seman A, Steeves M, Murrell JR, Luettgen S, Francisco E, Strom TM, Amlie-Wolf L, Kaindl AM, Wilson WG, Halbach S, Basel-Salmon L, Lev-El N, Denecke J, Vissers LELM, Radtke K, Chelly J, Zackai E, Friedman JM, Bamshad MJ, Nickerson DA, Reid RR, Devriendt K, Chae JH, Stolerman E, McDougall C, Powis Z, Bienvenu T, Tan TY, Orenstein N, Dobyns WB, Shieh JT, Choi M, Waggoner D, Gripp KW, Parker MJ, Stoler J, Lyonnet S, Cormier-Daire V, Viskochil D, Hoffman TL, Amiel J, Chung BHY, Gordon CT. MN1 C-terminal truncation syndrome is a novel neurodevelopmental and craniofacial disorder with partial rhombencephalosynapsis. Brain 2020; 143:55-68. [PMID: 31834374 DOI: 10.1093/brain/awz379] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [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: 07/05/2019] [Revised: 10/02/2019] [Accepted: 10/15/2019] [Indexed: 11/12/2022] Open
Abstract
MN1 encodes a transcriptional co-regulator without homology to other proteins, previously implicated in acute myeloid leukaemia and development of the palate. Large deletions encompassing MN1 have been reported in individuals with variable neurodevelopmental anomalies and non-specific facial features. We identified a cluster of de novo truncating mutations in MN1 in a cohort of 23 individuals with strikingly similar dysmorphic facial features, especially midface hypoplasia, and intellectual disability with severe expressive language delay. Imaging revealed an atypical form of rhombencephalosynapsis, a distinctive brain malformation characterized by partial or complete loss of the cerebellar vermis with fusion of the cerebellar hemispheres, in 8/10 individuals. Rhombencephalosynapsis has no previously known definitive genetic or environmental causes. Other frequent features included perisylvian polymicrogyria, abnormal posterior clinoid processes and persistent trigeminal artery. MN1 is encoded by only two exons. All mutations, including the recurrent variant p.Arg1295* observed in 8/21 probands, fall in the terminal exon or the extreme 3' region of exon 1, and are therefore predicted to result in escape from nonsense-mediated mRNA decay. This was confirmed in fibroblasts from three individuals. We propose that the condition described here, MN1 C-terminal truncation (MCTT) syndrome, is not due to MN1 haploinsufficiency but rather is the result of dominantly acting C-terminally truncated MN1 protein. Our data show that MN1 plays a critical role in human craniofacial and brain development, and opens the door to understanding the biological mechanisms underlying rhombencephalosynapsis.
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Affiliation(s)
- Christopher C Y Mak
- Department of Paediatrics and Adolescent Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Dan Doherty
- Department of Pediatrics, University of Washington, Seattle, WA, USA.,Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA, USA
| | - Angela E Lin
- Medical Genetics, MassGeneral Hospital for Children, Boston, MA, USA
| | - Nancy Vegas
- Laboratory of Embryology and Genetics of Human Malformation, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1163, Institut Imagine, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France
| | | | - Géraldine Viot
- Gynécologie Obstétrique, Hôpital Cochin, Hôpitaux Universitaires Paris Centre (HUPC), Assistance Publique Hôpitaux de Paris (AP-HP), Paris, France
| | - Clémantine Dimartino
- Laboratory of Embryology and Genetics of Human Malformation, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1163, Institut Imagine, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France
| | - James D Weisfeld-Adams
- Section of Clinical Genetics and Metabolism, Department of Pediatrics, University of Colorado-Denver School of Medicine, Aurora, CO, USA
| | - Davor Lessel
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | - Shelagh Joss
- West of Scotland Regional Genetics Service, Queen Elizabeth University Hospital, Glasgow, UK
| | - Chumei Li
- McMaster University Medical Center, Hamilton, Ontario, Canada
| | | | - Yuri A Zarate
- Section of Genetics and Metabolism, University of Arkansas for Medical Sciences, Arkansas Children's Hospital, Little Rock, AR, USA
| | - Nadja Ehmke
- Institute for Medical Genetics and Human Genetics, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Denise Horn
- Institute for Medical Genetics and Human Genetics, Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Caitlin Troyer
- Pediatrics and Medical Genetics, University of Virginia Health System, Charlottesville, VA, USA
| | - Sarina G Kant
- Department of Clinical Genetics, Leiden University Medical Center, RC Leiden, The Netherlands
| | - Youngha Lee
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Gisele E Ishak
- Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA, USA.,Department of Radiology, University of Washington, Seattle, WA, USA
| | - Gordon Leung
- Department of Paediatrics and Adolescent Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | | | | | - Eric G Bend
- Greenwood Genetic Center, Greenwood, SC, USA.,PreventionGenetics, Marshfield, WI, USA
| | - Francesca Filippini
- Laboratory of Embryology and Genetics of Human Malformation, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1163, Institut Imagine, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France
| | | | - Nicolas Lebrun
- Institut Cochin, INSERM U1016, CNRS UMR, Paris Descartes University, Paris, France
| | | | - Pierre-Marie Martin
- Institute for Human Genetics, University of California San Francisco, San Francisco, CA, USA.,Division of Medical Genetics, Department of Pediatrics, University of California San Francisco, San Francisco, CA, USA
| | - Benjamin Apple
- Section of Clinical Genetics and Metabolism, Department of Pediatrics, University of Colorado-Denver School of Medicine, Aurora, CO, USA
| | | | - Oliver Puk
- Praxis für Humangenetik Tübingen, Tübingen, Germany
| | - Mariette J V Hoffer
- Department of Clinical Genetics, Leiden University Medical Center, RC Leiden, The Netherlands
| | | | - Ruth McGowan
- West of Scotland Regional Genetics Service, Queen Elizabeth University Hospital, Glasgow, UK
| | | | - Steven Pei
- Department of Paediatrics and Adolescent Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Farah R Zahir
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Mullin Yu
- Department of Paediatrics and Adolescent Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - William T Gibson
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Ann Seman
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA
| | - Marcie Steeves
- Medical Genetics, MassGeneral Hospital for Children, Boston, MA, USA
| | - Jill R Murrell
- Division of Genomic Diagnostics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Sabine Luettgen
- Institute of Human Genetics, University Medical Center Hamburg-Eppendorf, Hamburg, Germany
| | | | - Tim M Strom
- Institute of Human Genetics, Helmholtz Zentrum München, Neuherberg, Germany.,Institute of Human Genetics, Technische Universität München, Munich, Germany
| | - Louise Amlie-Wolf
- Division of Medical Genetics, A I duPont Hospital for Children/Nemours, Wilmington, DE, USA
| | - Angela M Kaindl
- Charité - Universitätsmedizin Berlin, Institute of Neuroanatomy and Cell Biology, Department of Pediatric Neurology and Center for Chronically Sick Children, Berlin, Germany.,Berlin Institute of Health (BIH), Berlin, Germany
| | - William G Wilson
- Pediatrics and Medical Genetics, University of Virginia Health System, Charlottesville, VA, USA
| | - Sara Halbach
- Department of Human Genetics, University of Chicago, Chicago, IL, USA
| | - Lina Basel-Salmon
- Raphael Recanati Genetic Institute, Rabin Medical Center-Beilinson Hospital, Petach Tikva, Israel.,Pediatric Genetics Clinic, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Felsenstein Medical Research Center, Petach Tikva, Israel
| | - Noa Lev-El
- Raphael Recanati Genetic Institute, Rabin Medical Center-Beilinson Hospital, Petach Tikva, Israel
| | - Jonas Denecke
- Department of Pediatrics, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
| | - Lisenka E L M Vissers
- Department of Human Genetics, Donders Centre for Neuroscience, Radboud University Medical Center, HB Nijmegen, The Netherlands
| | - Kelly Radtke
- Clinical Genomics Department, Ambry Genetics, Aliso Viejo, CA, USA
| | - Jamel Chelly
- Laboratoire de Diagnostic Génétique, Hôpitaux Universitaires de Strasbourg, Nouvel Hôpital Civil, Strasbourg, France.,Fédération de Médecine Translationnelle de Strasbourg, Université de Strasbourg, 67000 Strasbourg, France.,Institut de Génétique et de Biologie Moléculaire et Cellulaire, INSERM U964, CNRS UMR7104, Université de Strasbourg, 67404 Illkirch, France
| | - Elaine Zackai
- Division of Human Genetics, Children's Hospital of Philadelphia, Philadelphia, PA, USA.,Department of Pediatrics, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Jan M Friedman
- Department of Medical Genetics, University of British Columbia, Vancouver, BC, Canada
| | - Michael J Bamshad
- Department of Pediatrics, University of Washington, Seattle, WA, USA.,Department of Genome Sciences, University of Washington, Seattle, WA, USA.,University of Washington Center for Mendelian Genomics, Seattle, WA, USA
| | - Deborah A Nickerson
- Department of Genome Sciences, University of Washington, Seattle, WA, USA.,University of Washington Center for Mendelian Genomics, Seattle, WA, USA
| | | | - Russell R Reid
- Department of Surgery, Section of Plastic Surgery, University of Chicago, Chicago, IL, USA
| | - Koenraad Devriendt
- Department of Human Genetics, Katholieke Universiteit Leuven, 3000 Leuven, Belgium
| | - Jong-Hee Chae
- Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
| | | | - Carey McDougall
- Division of Human Genetics, Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Zöe Powis
- Clinical Genomics Department, Ambry Genetics, Aliso Viejo, CA, USA
| | - Thierry Bienvenu
- Institut Cochin, INSERM U1016, CNRS UMR, Paris Descartes University, Paris, France.,Laboratoire de Génétique et Biologie Moléculaires, Hôpital Cochin, HUPC, AP-HP, 75014 Paris, France
| | - Tiong Y Tan
- Victorian Clinical Genetics Services, Murdoch Children's Research Institute, Department of Paediatrics, University of Melbourne, Melbourne, 3052, Australia
| | - Naama Orenstein
- Pediatric Genetics Clinic, Schneider Children's Medical Center of Israel, Petach Tikva, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - William B Dobyns
- Department of Pediatrics, University of Washington, Seattle, WA, USA.,Center for Integrative Brain Research, Seattle Children's Research Institute, Seattle, WA, USA.,Department of Neurology, University of Washington, Seattle, WA, USA
| | - Joseph T Shieh
- Institute for Human Genetics, University of California San Francisco, San Francisco, CA, USA.,Division of Medical Genetics, Department of Pediatrics, University of California San Francisco, San Francisco, CA, USA
| | - Murim Choi
- Department of Biomedical Sciences, Seoul National University College of Medicine, Seoul, Republic of Korea.,Department of Pediatrics, Seoul National University College of Medicine, Seoul, Republic of Korea
| | - Darrel Waggoner
- Department of Human Genetics, University of Chicago, Chicago, IL, USA
| | - Karen W Gripp
- Division of Medical Genetics, A I duPont Hospital for Children/Nemours, Wilmington, DE, USA
| | - Michael J Parker
- Sheffield Clinical Genetics Service, Sheffield Children's Hospital, Sheffield S10 2TH, UK
| | - Joan Stoler
- Division of Genetics and Genomics, Boston Children's Hospital, Boston, MA, USA
| | - Stanislas Lyonnet
- Laboratory of Embryology and Genetics of Human Malformation, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1163, Institut Imagine, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France.,Département de Génétique, Hôpital Necker-Enfants Malades, AP-HP, Paris, France
| | - Valérie Cormier-Daire
- Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France.,Département de Génétique, Hôpital Necker-Enfants Malades, AP-HP, Paris, France.,Laboratory of Molecular and Physiopathological Bases of Osteochondrodysplasia, INSERM UMR 1163, Institut Imagine, 75015 Paris, France
| | - David Viskochil
- Division of Medical Genetics, University of Utah, Salt Lake City, UT, USA
| | - Trevor L Hoffman
- Southern California Kaiser Permanente Medical Group, Anaheim, CA, USA
| | - Jeanne Amiel
- Laboratory of Embryology and Genetics of Human Malformation, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1163, Institut Imagine, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France.,Département de Génétique, Hôpital Necker-Enfants Malades, AP-HP, Paris, France
| | - Brian H Y Chung
- Department of Paediatrics and Adolescent Medicine, LKS Faculty of Medicine, The University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Christopher T Gordon
- Laboratory of Embryology and Genetics of Human Malformation, Institut National de la Santé et de la Recherche Médicale (INSERM) UMR 1163, Institut Imagine, Paris, France.,Paris Descartes-Sorbonne Paris Cité University, Institut Imagine, Paris, France
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37
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Aerden M, Bauters M, Van Den Bogaert K, Vermeesch JR, Holvoet M, Plasschaert F, Devriendt K. Genotype-phenotype correlations of UBA2 mutations in patients with ectrodactyly. Eur J Med Genet 2020; 63:104009. [PMID: 32758660 DOI: 10.1016/j.ejmg.2020.104009] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 06/05/2020] [Accepted: 07/10/2020] [Indexed: 10/23/2022]
Abstract
Interstitial 19q13.11 deletions are associated with ectrodactyly, which has recently been linked to loss-of-function of the UBA2 gene. We report a boy with a de novo frameshift mutation in UBA2 (c.612delA (p.(Glu205Lysfs*63)), presenting with ectrodactyly of the feet associated with learning difficulties and minor physical anomalies. We review genotype-phenotype correlations in patients with chromosomal 19q13.11 microdeletions compared to those with intragenic UBA2 mutations.
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Affiliation(s)
- Mio Aerden
- Center for Human Genetics, University Hospital Leuven and KU Leuven, Leuven, Belgium
| | - Marijke Bauters
- Center for Human Genetics, University Hospital Leuven and KU Leuven, Leuven, Belgium
| | - Kris Van Den Bogaert
- Center for Human Genetics, University Hospital Leuven and KU Leuven, Leuven, Belgium
| | - Joris R Vermeesch
- Center for Human Genetics, University Hospital Leuven and KU Leuven, Leuven, Belgium
| | - Maureen Holvoet
- Center for Human Genetics, University Hospital Leuven and KU Leuven, Leuven, Belgium
| | - Frank Plasschaert
- Department of Physical Medicine and Orthopaedic Surgery, Ghent University, Ghent, Belgium
| | - Koenraad Devriendt
- Center for Human Genetics, University Hospital Leuven and KU Leuven, Leuven, Belgium.
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38
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Kayembe-Kitenge T, Manyong'a Kadiamba V, de Luca C, Musa Obadia P, Kasamba Ilunga E, Mbuyi-Musanzayi S, Nawrot T, Lubaba Nkulu CB, Nemery B, Devriendt K. Agnathia otocephaly: A case from the Katanga Copperbelt. Birth Defects Res 2020; 112:1287-1291. [PMID: 32639113 DOI: 10.1002/bdr2.1758] [Citation(s) in RCA: 1] [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: 05/08/2020] [Revised: 06/02/2020] [Accepted: 06/14/2020] [Indexed: 12/20/2022]
Abstract
BACKGROUND Agnathia otocephaly is a rare craniofacial malformation complex characterised by absent/hypoplastic mandible, abnormally positioned ears meeting at level of neck. Besides mutations in two genes, PRRX1 and OTX2, a teratogenic cause has been suggested. A higher risk of congenital malformations has been associated with paternal work in mining in the Democratic Republic of the Congo's part of the Copperbelt. CASE We studied a female neonate with a clinical diagnosis of agnathia otocephaly, stillborn in Lubumbashi in 2019. The child's father had been working as an artisanal mineworker at the time of conception. RESULTS Genetic analysis did not reveal a causal mutation. The concentrations of cobalt, arsenic cadmium, and uranium in cord blood of the infant were much higher than those of normal neonates from a previous study. CONCLUSION In the absence of identified genetic causes, we hypothesize this case of agnathia otocephaly was related to an exogenous cause, possibly the father's mining-related job.
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Affiliation(s)
- Tony Kayembe-Kitenge
- Unit of Toxicology and Environment, School of Public Health, University of Lubumbashi, Lubumbashi, DR Congo.,Department of Internal Medicine University Hospital, University of Malemba-Nkulu, Malemba-Nkulu, DR Congo.,Centre for Environment and Health, Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium
| | - Vicky Manyong'a Kadiamba
- Department of Gynaeco-obstetrics, University Hospital, University of Lubumbashi, Lubumbashi, DR Congo
| | - Chiara de Luca
- Center for Human Genetics, University Hospital, KU Leuven, Leuven, Belgium
| | - Paul Musa Obadia
- Unit of Toxicology and Environment, School of Public Health, University of Lubumbashi, Lubumbashi, DR Congo.,Department of Internal Medicine University Hospital, University of Malemba-Nkulu, Malemba-Nkulu, DR Congo.,Centre for Environment and Health, Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium
| | | | | | - Tim Nawrot
- Centre for Environment and Health, Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium
| | - Célestin Banza Lubaba Nkulu
- Unit of Toxicology and Environment, School of Public Health, University of Lubumbashi, Lubumbashi, DR Congo.,Department of Internal Medicine University Hospital, University of Malemba-Nkulu, Malemba-Nkulu, DR Congo
| | - Benoit Nemery
- Centre for Environment and Health, Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium
| | - Koenraad Devriendt
- Center for Human Genetics, University Hospital, KU Leuven, Leuven, Belgium
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39
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Muys J, Jacquemyn Y, Blaumeiser B, Bourlard L, Brison N, Bulk S, Chiarappa P, De Leener A, De Rademaeker M, Désir J, Destrée A, Devriendt K, Dheedene A, Duquenne A, Fieuw A, Fransen E, Gatot J, Jamar M, Janssens S, Kerstjens J, Keymolen K, Lederer D, Menten B, Pichon B, Rombout S, Sznajer Y, Van Den Bogaert A, Van Den Bogaert K, Vermeesch J, Janssens K. Prenatally detected copy number variants in a national cohort: A postnatal follow‐up study. Prenat Diagn 2020; 40:1272-1283. [DOI: 10.1002/pd.5751] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2020] [Revised: 05/13/2020] [Accepted: 05/16/2020] [Indexed: 01/17/2023]
Affiliation(s)
- Joke Muys
- Department of Gynaecology University Hospital Antwerp Edegem Belgium
- Center for Medical Genetics, Universiteit Antwerpen Antwerpen Belgium
| | - Yves Jacquemyn
- Department of Gynaecology University Hospital Antwerp Edegem Belgium
- ASTARC and Global Health Institute Universiteit Antwerpen Antwerpen Belgium
| | - Bettina Blaumeiser
- Department of Gynaecology University Hospital Antwerp Edegem Belgium
- Center for Medical Genetics, Universiteit Antwerpen Antwerpen Belgium
| | - Laura Bourlard
- Center for Medical Genetics Université Libre de Bruxelles Bruxelles Belgium
| | - Nathalie Brison
- Center for Medical Genetics Katholieke Universiteit Leuven Leuven Belgium
| | - Saskia Bulk
- Center for Medical Genetics Centre Hospitalier Universitaire de Liège Liege Belgium
| | - Patrizia Chiarappa
- Center for Medical Genetics Université Catholique de Louvain Louvain‐la‐Neuve Belgium
| | - Anne De Leener
- Center for Medical Genetics Université Catholique de Louvain Louvain‐la‐Neuve Belgium
| | | | - Julie Désir
- Center for Medical Genetics Université Libre de Bruxelles Bruxelles Belgium
| | - Anne Destrée
- Center for Medical Genetics Institut de Pathologie et de Génétique Gosselies Gosselies Belgium
| | - Koenraad Devriendt
- Center for Medical Genetics Katholieke Universiteit Leuven Leuven Belgium
| | | | - Armelle Duquenne
- Center for Medical Genetics Université Catholique de Louvain Louvain‐la‐Neuve Belgium
| | - Annelies Fieuw
- Center for Medical Genetics Vrije Universiteit Brussel Brussel Belgium
| | - Erik Fransen
- Center for Medical Genetics, Universiteit Antwerpen Antwerpen Belgium
| | - Jean‐Stéphane Gatot
- Center for Medical Genetics Centre Hospitalier Universitaire de Liège Liege Belgium
| | - Mauricette Jamar
- Center for Medical Genetics Centre Hospitalier Universitaire de Liège Liege Belgium
| | | | - Jorien Kerstjens
- Faculty for Medical Sciences Rijksuniversteit Groningen Groningen The Netherlands
| | | | - Damien Lederer
- Center for Medical Genetics Institut de Pathologie et de Génétique Gosselies Gosselies Belgium
| | - Björn Menten
- Center for Medical Genetics Universiteit Gent Gent Belgium
| | - Bruno Pichon
- Center for Medical Genetics Université Libre de Bruxelles Bruxelles Belgium
| | - Sonia Rombout
- Center for Medical Genetics Institut de Pathologie et de Génétique Gosselies Gosselies Belgium
| | - Yves Sznajer
- Center for Medical Genetics Université Catholique de Louvain Louvain‐la‐Neuve Belgium
| | | | | | - Joris Vermeesch
- Center for Medical Genetics Katholieke Universiteit Leuven Leuven Belgium
| | - Katrien Janssens
- Center for Medical Genetics, Universiteit Antwerpen Antwerpen Belgium
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40
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Mubungu G, Lukute G, Makay P, Songo C, Lukusa P, Devriendt K, Lumaka A. Phenotype and growth in Sotos syndrome patient from
DR
Congo (Central Africa). Am J Med Genet A 2020; 182:1572-1575. [DOI: 10.1002/ajmg.a.61617] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 03/09/2020] [Accepted: 04/20/2020] [Indexed: 11/09/2022]
Affiliation(s)
- Gerrye Mubungu
- Center for Human Genetics University of Kinshasa Kinshasa Congo
- Institut National de Recherche Biomédicale (INRB) Kinshasa Congo
- Center for Human Genetics Catholic University of Leuven Leuven Belgium
| | | | - Prince Makay
- Center for Human Genetics University of Kinshasa Kinshasa Congo
- Center for Human Genetics Catholic University of Leuven Leuven Belgium
| | - Cathy Songo
- Center for Human Genetics University of Kinshasa Kinshasa Congo
| | - Prosper Lukusa
- Center for Human Genetics University of Kinshasa Kinshasa Congo
- Institut National de Recherche Biomédicale (INRB) Kinshasa Congo
- Center for Human Genetics Catholic University of Leuven Leuven Belgium
| | | | - Aimé Lumaka
- Center for Human Genetics University of Kinshasa Kinshasa Congo
- Institut National de Recherche Biomédicale (INRB) Kinshasa Congo
- Département des Sciences Biomédicales et Précliniques, GIGA‐R, Laboratoire de Génétique Humaine University of Liège Liège Belgium
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Rinaldi B, Race V, Corveleyn A, Van Hoof E, Bauters M, Van Den Bogaert K, Denayer E, de Ravel T, Legius E, Baldewijns M, Aertsen M, Lewi L, De Catte L, Breckpot J, Devriendt K. Next-generation sequencing in prenatal setting: Some examples of unexpected variant association. Eur J Med Genet 2020; 63:103875. [PMID: 32058062 DOI: 10.1016/j.ejmg.2020.103875] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2019] [Revised: 11/28/2019] [Accepted: 02/01/2020] [Indexed: 01/08/2023]
Abstract
The application of next-generation sequencing to fetal pathology has proved to increase the diagnostic yield in fetuses with abnormal ultrasounds. We retrospectively reviewed genetic data of 30 selected cases studied through targeted resequencing of OMIM genes. In our experience, clinical data proved to be essential to support diagnostic reasoning and enhance variants' assessment. The molecular diagnosis was reached in 19/30 (63%) cases. Only in 7/19 cases the molecular diagnosis confirmed the initial diagnostic hypothesis, showing the relevance of the genotype-first approach. According to the genotype-phenotype correlation, we were able to divide the solved cases into three groups: i) the correlation is well established but it was missed due to lack of specificity, unusual presentation or recent description; ii) the clinical presentation is much more severe than currently known for the underlying condition; iii) the correlation does not recapitulate the entire phenotype, possibly due to the fetal presentation or multiple coexisting conditions. Moreover, we found a higher proportion of recessive diagnosis in abnormal fetuses compared to cohorts of individuals with developmental delay. Our findings suggest that fetal pathology may be enriched in rare alleles and/or in unusual combinations, counter-selected in postnatal genomes and thus contributing to both phenotypic extremeness and atypical presentation.
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Affiliation(s)
| | - Valerie Race
- Center for Human Genetics, University Hospitals Leuven, Catholic University Leuven, Leuven, Belgium
| | - Anniek Corveleyn
- Center for Human Genetics, University Hospitals Leuven, Catholic University Leuven, Leuven, Belgium
| | - Evelien Van Hoof
- Center for Human Genetics, University Hospitals Leuven, Catholic University Leuven, Leuven, Belgium
| | - Marijke Bauters
- Center for Human Genetics, University Hospitals Leuven, Catholic University Leuven, Leuven, Belgium
| | - Kris Van Den Bogaert
- Center for Human Genetics, University Hospitals Leuven, Catholic University Leuven, Leuven, Belgium
| | - Ellen Denayer
- Center for Human Genetics, University Hospitals Leuven, Catholic University Leuven, Leuven, Belgium
| | - Thomy de Ravel
- Centre for Medical Genetics, Reproduction and Genetics, University Hospital Brussels, Brussels, Belgium
| | - Eric Legius
- Center for Human Genetics, University Hospitals Leuven, Catholic University Leuven, Leuven, Belgium
| | - Marcella Baldewijns
- Department of Pathological Anatomy, University Hospitals Leuven, Catholic University Leuven, Leuven, Belgium
| | - Michael Aertsen
- Department of Radiology, University Hospitals Leuven, Catholic University Leuven, Leuven, Belgium
| | - Liesbeth Lewi
- Department of Obstetrics & Gynaecology, Fetal Medicine, University Hospitals Leuven, Catholic University Leuven, Leuven, Belgium
| | - Luc De Catte
- Department of Obstetrics & Gynaecology, Fetal Medicine, University Hospitals Leuven, Catholic University Leuven, Leuven, Belgium
| | - Jeroen Breckpot
- Center for Human Genetics, University Hospitals Leuven, Catholic University Leuven, Leuven, Belgium
| | - Koenraad Devriendt
- Center for Human Genetics, University Hospitals Leuven, Catholic University Leuven, Leuven, Belgium.
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Cosemans N, Vandenhove L, Vogels A, Devriendt K, Van Esch H, Van Buggenhout G, Olivié H, de Ravel T, Ortibus E, Legius E, Aerssens P, Breckpot J, R Vermeesch J, Shen S, Fitzgerald J, Gallagher L, Peeters H. The clinical relevance of intragenic NRXN1 deletions. J Med Genet 2020; 57:347-355. [PMID: 31932357 DOI: 10.1136/jmedgenet-2019-106448] [Citation(s) in RCA: 6] [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: 08/02/2019] [Revised: 11/02/2019] [Accepted: 11/17/2019] [Indexed: 11/03/2022]
Abstract
BACKGROUND Intragenic NRXN1 deletions are susceptibility variants for neurodevelopmental disorders; however, their clinical interpretation is often unclear. Therefore, a literature study and an analysis of 43 previously unpublished deletions are provided. METHODS The literature cohort covered 629 heterozygous NRXN1 deletions: 148 in controls, 341 in probands and 140 in carrier relatives, and was used for clinical hypothesis testing. Exact breakpoint determination was performed for 43 in-house deletions. RESULTS The prevalence of exonic NRXN1 deletions in controls was ~1/3000 as compared with ~1/800 in patients with neurodevelopmental/neuropsychiatric disorders. The differential distribution of deletions across the gene between controls and probands allowed to distinguish distinct areas within the gene. Exon 6-24 deletions appeared only twice in over 100000 control individuals, had an estimated penetrance for neurodevelopmental disorders of 32.43%, a de novo rate of 50% and segregated mainly with intellectual disability (ID) and schizophrenia. In contrast, exon 1-5 deletions appeared in 20 control individuals, had an estimated penetrance of 12.59%, a de novo rate of 32.5% and were reported with a broad range of neurodevelopmental phenotypes. Exact breakpoint determination revealed six recurrent intron 5 deletions. CONCLUSION Exon 6-24 deletions have a high penetrance and are mainly associated with ID and schizophrenia. In contrast, the actual contribution of exon 1-5 deletions to a neurodevelopmental/neuropsychiatric disorder in an individual patient and family remains very difficult to assess. To enhance the clinical interpretation, this study provides practical considerations for counselling and an interactive table for comparing a deletion of interest with the available literature data.
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Affiliation(s)
- Nele Cosemans
- Department of Human Genetics, KU Leuven, Leuven, Belgium.,Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | | | - Annick Vogels
- Department of Human Genetics, KU Leuven, Leuven, Belgium
| | | | - Hilde Van Esch
- Department of Human Genetics, KU Leuven, Leuven, Belgium
| | | | - Hilde Olivié
- Center for Developmental Disabilities Leuven, Leuven, Belgium
| | - Thomy de Ravel
- Department of Human Genetics, KU Leuven, Leuven, Belgium
| | - Els Ortibus
- Center for Developmental Disabilities Leuven, Leuven, Belgium.,Department of Development and Regeneration, KU Leuven, Leuven, Belgium
| | - Eric Legius
- Department of Human Genetics, KU Leuven, Leuven, Belgium.,Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
| | | | | | | | - Sanbing Shen
- Regenerative Medicine Institute, School of Medicine, BioMedical Sciences Building, National University of Ireland (NUI), Galway, Ireland
| | | | - Louise Gallagher
- Trinity College Institute of Neuroscience, Trinity College Dublin, Dublin, Ireland
| | - Hilde Peeters
- Department of Human Genetics, KU Leuven, Leuven, Belgium .,Leuven Autism Research (LAuRes), KU Leuven, Leuven, Belgium
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43
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Mubungu G, Lumaka A, Mvuama N, Tshika D, Makay P, Tshilobo PL, Devriendt K. Morphological characterization of newborns in Kinshasa, DR Congo: Common variants, minor, and major anomalies. Am J Med Genet A 2020; 182:632-639. [DOI: 10.1002/ajmg.a.61477] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2019] [Revised: 11/28/2019] [Accepted: 12/16/2019] [Indexed: 12/26/2022]
Affiliation(s)
- Gerrye Mubungu
- Faculty of Medicine, Centre for Human GeneticsUniversity of Kinshasa Kinshasa DR Congo
- Faculty of Medicine, Department of PediatricsUniversity of Kinshasa Kinshasa DR Congo
- Centre for Human Genetics, University HospitalsUniversity of Leuven Leuven Belgium
| | - Aimé Lumaka
- Faculty of Medicine, Centre for Human GeneticsUniversity of Kinshasa Kinshasa DR Congo
- Faculty of Medicine, Department of PediatricsUniversity of Kinshasa Kinshasa DR Congo
- Département des Sciences Biomédicales et Précliniques, GIGA‐R, Laboratoire de Génétique HumaineUniversity of Liège Liège Belgium
- Institut National de Recherche Biomédicale Kinshasa DR Congo
| | - Nono Mvuama
- Department of Health EnvironmentKinshasa School of Public Health Kinshasa DR Congo
| | - Dahlie Tshika
- Faculty of Medicine, Centre for Human GeneticsUniversity of Kinshasa Kinshasa DR Congo
- Faculty of Medicine, Department of PediatricsUniversity of Kinshasa Kinshasa DR Congo
| | - Prince Makay
- Faculty of Medicine, Centre for Human GeneticsUniversity of Kinshasa Kinshasa DR Congo
- Faculty of Medicine, Department of PediatricsUniversity of Kinshasa Kinshasa DR Congo
| | - Prosper Lukusa Tshilobo
- Faculty of Medicine, Centre for Human GeneticsUniversity of Kinshasa Kinshasa DR Congo
- Faculty of Medicine, Department of PediatricsUniversity of Kinshasa Kinshasa DR Congo
- Centre for Human Genetics, University HospitalsUniversity of Leuven Leuven Belgium
- Institut National de Recherche Biomédicale Kinshasa DR Congo
| | - Koenraad Devriendt
- Centre for Human Genetics, University HospitalsUniversity of Leuven Leuven Belgium
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Abstract
PURPOSE To characterize the ocular features of a severe case of renal coloboma syndrome in a long-term follow-up. METHODS Observational case report over a period of 45 years. Examination under anesthesia at the age of 3 months, repeated ophthalmologic examination (age 7, 14, 25, 45 years), fluorescein and indocyanine green angiography, electroretinography, ocular ultrasound, optical coherence tomography, computed tomography scan orbits, and magnetic resonance imaging of the brain. RESULTS Presentation with severe bilateral posterior eye defects, optic nerve aplasia and a retrobulbar cyst in the left eye, renal abnormalities, and mental retardation. Over time, a progressive axial myopia in the right eye, band keratopathy in the left eye, and progressive bilateral posterior lens opacities were noted. There was only a minor decrease in visual acuity and visual field of the only functional right eye. The mother of this patient had a mild optic disk hypoplasia, progressive lens opacities, and late-onset renal disease. Both had a confirmed mutation in exon 2 of the PAX2 gene. CONCLUSION This first published long-term follow-up of renal coloboma syndrome shows progressive posterior lens opacities, axial myopia, and band keratopathy with only a small decline in visual function over time.
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Affiliation(s)
- Lise Sels
- Department of Ophthalmology, University Hospital Leuven Campus St. Rafaël, University of Leuven (KUL), Leuven, Belgium
| | - Werner Dirven
- Department of Ophthalmology, Turnhout General Hospital, AZ Turnhout, Turnhout, Belgium; and
| | - Koenraad Devriendt
- Department of Human Genetics, University Hospital Leuven Campus Gasthuisberg, University of Leuven (KUL), Leuven, Belgium
| | - Anita Leys
- Department of Ophthalmology, University Hospital Leuven Campus St. Rafaël, University of Leuven (KUL), Leuven, Belgium
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45
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Page DJ, Miossec MJ, Williams SG, Monaghan RM, Fotiou E, Cordell HJ, Sutcliffe L, Topf A, Bourgey M, Bourque G, Eveleigh R, Dunwoodie SL, Winlaw DS, Bhattacharya S, Breckpot J, Devriendt K, Gewillig M, Brook JD, Setchfield KJ, Bu'Lock FA, O'Sullivan J, Stuart G, Bezzina CR, Mulder BJM, Postma AV, Bentham JR, Baron M, Bhaskar SS, Black GC, Newman WG, Hentges KE, Lathrop GM, Santibanez-Koref M, Keavney BD. Whole Exome Sequencing Reveals the Major Genetic Contributors to Nonsyndromic Tetralogy of Fallot. Circ Res 2019; 124:553-563. [PMID: 30582441 DOI: 10.1161/circresaha.118.313250] [Citation(s) in RCA: 98] [Impact Index Per Article: 19.6] [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] [Indexed: 11/16/2022]
Abstract
RATIONALE Familial recurrence studies provide strong evidence for a genetic component to the predisposition to sporadic, nonsyndromic Tetralogy of Fallot (TOF), the most common cyanotic congenital heart disease phenotype. Rare genetic variants have been identified as important contributors to the risk of congenital heart disease, but relatively small numbers of TOF cases have been studied to date. OBJECTIVE We used whole exome sequencing to assess the prevalence of unique, deleterious variants in the largest cohort of nonsyndromic TOF patients reported to date. METHODS AND RESULTS Eight hundred twenty-nine TOF patients underwent whole exome sequencing. The presence of unique, deleterious variants was determined; defined by their absence in the Genome Aggregation Database and a scaled combined annotation-dependent depletion score of ≥20. The clustering of variants in 2 genes, NOTCH1 and FLT4, surpassed thresholds for genome-wide significance (assigned as P<5×10-8) after correction for multiple comparisons. NOTCH1 was most frequently found to harbor unique, deleterious variants. Thirty-one changes were observed in 37 probands (4.5%; 95% CI, 3.2%-6.1%) and included 7 loss-of-function variants 22 missense variants and 2 in-frame indels. Sanger sequencing of the unaffected parents of 7 cases identified 5 de novo variants. Three NOTCH1 variants (p.G200R, p.C607Y, and p.N1875S) were subjected to functional evaluation, and 2 showed a reduction in Jagged1-induced NOTCH signaling. FLT4 variants were found in 2.4% (95% CI, 1.6%-3.8%) of TOF patients, with 21 patients harboring 22 unique, deleterious variants. The variants identified were distinct to those that cause the congenital lymphoedema syndrome Milroy disease. In addition to NOTCH1, FLT4 and the well-established TOF gene, TBX1, we identified potential association with variants in several other candidates, including RYR1, ZFPM1, CAMTA2, DLX6, and PCM1. CONCLUSIONS The NOTCH1 locus is the most frequent site of genetic variants predisposing to nonsyndromic TOF, followed by FLT4. Together, variants in these genes are found in almost 7% of TOF patients.
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Affiliation(s)
- Donna J Page
- From the Division of Cardiovascular Sciences, School of Medical Sciences, Faculty of Biology, Medicine, and Health, Manchester Academic Health Science Centre, University of Manchester, United Kingdom (D.J.P., S.G.W., R.M.M., E.F., B.D.K.)
| | - Matthieu J Miossec
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom (M.J.M., H.J.C., L.S., A.T., M.S.-K.).,Center for Bioinformatics and Integrative Biology, Faculty of Biological Sciences, Universidad Andrés Bello, Santiago, Chile (M.J.M.)
| | - Simon G Williams
- From the Division of Cardiovascular Sciences, School of Medical Sciences, Faculty of Biology, Medicine, and Health, Manchester Academic Health Science Centre, University of Manchester, United Kingdom (D.J.P., S.G.W., R.M.M., E.F., B.D.K.)
| | - Richard M Monaghan
- From the Division of Cardiovascular Sciences, School of Medical Sciences, Faculty of Biology, Medicine, and Health, Manchester Academic Health Science Centre, University of Manchester, United Kingdom (D.J.P., S.G.W., R.M.M., E.F., B.D.K.)
| | - Elisavet Fotiou
- From the Division of Cardiovascular Sciences, School of Medical Sciences, Faculty of Biology, Medicine, and Health, Manchester Academic Health Science Centre, University of Manchester, United Kingdom (D.J.P., S.G.W., R.M.M., E.F., B.D.K.)
| | - Heather J Cordell
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom (M.J.M., H.J.C., L.S., A.T., M.S.-K.)
| | | | - Ana Topf
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom (M.J.M., H.J.C., L.S., A.T., M.S.-K.)
| | - Mathieu Bourgey
- Canadian Centre for Computational Genomics, Montréal, QC, Canada (M.B.).,McGill Genome Center, Montréal, QC, Canada (M.B., G.B., R.E., G.M.L.)
| | - Guillaume Bourque
- McGill Genome Center, Montréal, QC, Canada (M.B., G.B., R.E., G.M.L.)
| | - Robert Eveleigh
- McGill Genome Center, Montréal, QC, Canada (M.B., G.B., R.E., G.M.L.)
| | - Sally L Dunwoodie
- Chain Reaction Program in Congenital Heart Disease Research, Victor Chang Cardiac Research Institute, Sydney, NSW, Australia (S.L.D.).,Faculties of Medicine and Science, University of New South Wales, Sydney (S.L.D.).,Heart Centre for Children, The Children's Hospital at Westmead, Sydney, NSW (S.L.D.)
| | - David S Winlaw
- School of Child and Adolescent Health, Sydney Medical School, University of Sydney (D.S.W.).,Victor Chang Cardiac Research Institute, NSW, Australia (D.S.W.).,RDM Cardiovascular Medicine, Wellcome Centre for Human Genetics, University of Oxford (D.S.W., S.B.)
| | - Shoumo Bhattacharya
- RDM Cardiovascular Medicine, Wellcome Centre for Human Genetics, University of Oxford (D.S.W., S.B.).,Center for Human Genetics, Catholic University Leuven, Belgium (S.B., J.B., K.D.)
| | - Jeroen Breckpot
- Center for Human Genetics, Catholic University Leuven, Belgium (S.B., J.B., K.D.).,Pediatric and Congenital Cardiology, UZ Leuven (J.B., M.G.)
| | - Koenraad Devriendt
- Center for Human Genetics, Catholic University Leuven, Belgium (S.B., J.B., K.D.)
| | - Marc Gewillig
- Pediatric and Congenital Cardiology, UZ Leuven (J.B., M.G.)
| | - J David Brook
- School of Life Sciences, University of Nottingham, Queen's Medical Centre (J.D.B., K.J.S.)
| | - Kerry J Setchfield
- School of Life Sciences, University of Nottingham, Queen's Medical Centre (J.D.B., K.J.S.)
| | - Frances A Bu'Lock
- Congenital and Paediatric Cardiology, East Midlands Congenital Heart Centre and University of Leicester, Glenfield Hospital (F.A.B.)
| | - John O'Sullivan
- Adult Congenital and Paediatric Cardiac Unit, Freeman Hospital, Newcastle upon Tyne (J.O.)
| | - Graham Stuart
- University Hospitals Bristol NHS Foundation Trust, Bristol (G.S.)
| | - Connie R Bezzina
- Heart Center, Department of Clinical and Experimental Cardiology (C.R.B.), Academic Medical Center, Amsterdam, the Netherlands
| | - Barbara J M Mulder
- Department of Medical Biology (B.J.M.M.), Academic Medical Center, Amsterdam, the Netherlands
| | - Alex V Postma
- Department of Clinical Genetics (A.V.P.), Academic Medical Center, Amsterdam, the Netherlands
| | - James R Bentham
- Department of Paediatric Cardiology, Yorkshire Heart Centre, Leeds (J.R.B.)
| | - Martin Baron
- Division of Molecular and Cellular Function, School of Biological Sciences, Faculty of Biology Medicine and Health, University of Manchester (M.B.)
| | - Sanjeev S Bhaskar
- Manchester Centre for Genomic Medicine, Saint Mary's Hospital, Oxford, Manchester (S.S.B., G.C.B.)
| | - Graeme C Black
- Manchester Centre for Genomic Medicine, Saint Mary's Hospital, Oxford, Manchester (S.S.B., G.C.B.)
| | - William G Newman
- Division of Evolution and Genomic Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Oxford (W.G.N.); and Division of Evolution and Genomic Sciences, School of Biological Sciences, Faculty of Biology, Medicine and Health, The University of Manchester, UK
| | | | - G Mark Lathrop
- McGill Genome Center, Montréal, QC, Canada (M.B., G.B., R.E., G.M.L.)
| | - Mauro Santibanez-Koref
- Institute of Genetic Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom (M.J.M., H.J.C., L.S., A.T., M.S.-K.)
| | - Bernard D Keavney
- From the Division of Cardiovascular Sciences, School of Medical Sciences, Faculty of Biology, Medicine, and Health, Manchester Academic Health Science Centre, University of Manchester, United Kingdom (D.J.P., S.G.W., R.M.M., E.F., B.D.K.)
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Cheng H, Capponi S, Wakeling E, Marchi E, Li Q, Zhao M, Weng C, Piatek SG, Ahlfors H, Kleyner R, Rope A, Lumaka A, Lukusa P, Devriendt K, Vermeesch J, Posey JE, Palmer EE, Murray L, Leon E, Diaz J, Worgan L, Mallawaarachchi A, Vogt J, de Munnik SA, Dreyer L, Baynam G, Ewans L, Stark Z, Lunke S, Gonçalves AR, Soares G, Oliveira J, Fassi E, Willing M, Waugh JL, Faivre L, Riviere JB, Moutton S, Mohammed S, Payne K, Walsh L, Begtrup A, Sacoto MJG, Douglas G, Alexander N, Buckley MF, Mark PR, Adès LC, Sandaradura SA, Lupski JR, Roscioli T, Agrawal PB, Kline AD, Wang K, Timmers HTM, Lyon GJ. Missense variants in TAF1 and developmental phenotypes: challenges of determining pathogenicity. Hum Mutat 2019; 41:10.1002/humu.23936. [PMID: 31646703 PMCID: PMC7187541 DOI: 10.1002/humu.23936] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2019] [Accepted: 10/16/2019] [Indexed: 12/26/2022]
Abstract
We recently described a new neurodevelopmental syndrome (TAF1/MRXS33 intellectual disability syndrome) (MIM# 300966) caused by pathogenic variants involving the X-linked gene TAF1, which participates in RNA polymerase II transcription. The initial study reported eleven families, and the syndrome was defined as presenting early in life with hypotonia, facial dysmorphia, and developmental delay that evolved into intellectual disability (ID) and/or autism spectrum disorder (ASD). We have now identified an additional 27 families through a genotype-first approach. Familial segregation analysis, clinical phenotyping, and bioinformatics were capitalized on to assess potential variant pathogenicity, and molecular modelling was performed for those variants falling within structurally characterized domains of TAF1. A novel phenotypic clustering approach was also applied, in which the phenotypes of affected individuals were classified using 51 standardized Human Phenotype Ontology (HPO) terms. Phenotypes associated with TAF1 variants show considerable pleiotropy and clinical variability, but prominent among previously unreported effects were brain morphological abnormalities, seizures, hearing loss, and heart malformations. Our allelic series broadens the phenotypic spectrum of TAF1/MRXS33 intellectual disability syndrome and the range of TAF1 molecular defects in humans. It also illustrates the challenges for determining the pathogenicity of inherited missense variants, particularly for genes mapping to chromosome X. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Hanyin Cheng
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Simona Capponi
- German Cancer Consortium (DKTK), Partner Site Freiburg, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Department of Urology, Medical Faculty-University of Freiburg, Freiburg, Germany
| | - Emma Wakeling
- North West Thames Regional Genetics Service, London North West University Healthcare NHS Trust, Harrow, UK
| | - Elaine Marchi
- Institute for Basic Research in Developmental Disabilities (IBR), Staten Island, New York
| | - Quan Li
- Princess Margaret Cancer Centre, University Health Network, University of Toronto, Toronto, Ontario, Canada
| | - Mengge Zhao
- Raymond G. Perelman Center for Cellular and Molecular Therapeutics, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - Chunhua Weng
- Department of Biomedical Informatics, Columbia University Medical Center, New York, New York
| | - Stefan G. Piatek
- North East Thames Regional Genetics Laboratory, Great Ormond Street Hospital, London, UK
| | - Helena Ahlfors
- North East Thames Regional Genetics Laboratory, Great Ormond Street Hospital, London, UK
| | - Robert Kleyner
- Stanley Institute for Cognitive Genomics, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York
| | - Alan Rope
- Kaiser Permanente Center for Health Research, Portland, Oregon
- Genome Medical, South San Francisco, California
| | - Aimé Lumaka
- Department of Biomedical and Preclinical Sciences, GIGA-R, Laboratory of Human Genetics, University of Liège, Liège, Belgium
- Institut National de Recherche Biomédicale, Kinshasa, DR Congo
- Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, DR Congo
| | - Prosper Lukusa
- Institut National de Recherche Biomédicale, Kinshasa, DR Congo
- Centre for Human Genetics, Faculty of Medicine, University of Kinshasa, Kinshasa, DR Congo
- Centre for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
| | - Koenraad Devriendt
- Centre for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
| | - Joris Vermeesch
- Centre for Human Genetics, University Hospital, University of Leuven, Leuven, Belgium
| | - Jennifer E. Posey
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
| | - Elizabeth E. Palmer
- Genetics of Learning Disability Service, Newcastle, New South Wales, Australia
- School of Women’s and Children’s Health, University of New South Wales, Randwick, New South Wales, Australia
| | - Lucinda Murray
- Genetics of Learning Disability Service, Newcastle, New South Wales, Australia
| | - Eyby Leon
- Rare Disease Institute, Children’s National Health System, Washington, District of Columbia
| | - Jullianne Diaz
- Rare Disease Institute, Children’s National Health System, Washington, District of Columbia
| | - Lisa Worgan
- Department of Clinical Genetics, Liverpool Hospital, Sydney, New South Wales, Australia
| | - Amali Mallawaarachchi
- Department of Clinical Genetics, Liverpool Hospital, Sydney, New South Wales, Australia
| | - Julie Vogt
- West Midlands Regional Clinical Genetics Service and Birmingham Health Partners, Birmingham Women’s and Children’s Hospitals NHS Foundation Trust, Birmingham, UK
| | - Sonja A. de Munnik
- Department of Human Genetics, Institute for Genetic and Metabolic Disease, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Lauren Dreyer
- Genetic Services of Western Australia, Undiagnosed Diseases Program, Perth, Western Australia, Australia
| | - Gareth Baynam
- Genetic Services of Western Australia, Undiagnosed Diseases Program, Perth, Western Australia, Australia
- Western Australian Register of Developmental Anomalies, Perth, Western Australia, Australia
- Institute for Immunology and Infectious Diseases, Murdoch University, Perth, Western Australia, Australia
- Telethon Kids Institute, Perth, Western Australia, Australia
- Division of Paediatrics, School of Medicine, University of Western Australia, Perth, Western Australia, Australia
| | - Lisa Ewans
- Kinghorn Centre for Clinical Genomics, Garvan Institute of Medical Research, Darlinghurst, New South Wales, Australia
| | - Zornitza Stark
- Victorian Clinical Genetics Services, Murdoch Children’s Research Institute, Melbourne, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Melbourne, Victoria, Australia
- Australian Genomics Health Alliance, Melbourne, Victoria, Australia
| | - Sebastian Lunke
- Victorian Clinical Genetics Services, Murdoch Children’s Research Institute, Melbourne, Victoria, Australia
- Department of Paediatrics, University of Melbourne, Melbourne, Victoria, Australia
- Australian Genomics Health Alliance, Melbourne, Victoria, Australia
| | - Ana R. Gonçalves
- Center for Medical Genetics Dr. Jacinto de Magalhāes, Hospital and University Center of Porto, Porto, Portugal
| | - Gabriela Soares
- Center for Medical Genetics Dr. Jacinto de Magalhāes, Hospital and University Center of Porto, Porto, Portugal
| | - Jorge Oliveira
- Center for Medical Genetics Dr. Jacinto de Magalhāes, Hospital and University Center of Porto, Porto, Portugal
- unIGENe, and Center for Predictive and Preventive Genetics (CGPP), Institute for Molecular and Cell Biology (IBMC), Institute of Health Research and Innovation (i3S), University of Porto, Porto, Portugal
| | - Emily Fassi
- Department of Pediatrics, Division of Genetics and Genomic Medicine, Washington University School of Medicine, St. Louis, Michigan
| | - Marcia Willing
- Department of Pediatrics, Division of Genetics and Genomic Medicine, Washington University School of Medicine, St. Louis, Michigan
| | - Jeff L. Waugh
- Department of Neurology, Boston Children’s Hospital, Harvard Medical School, Boston, Massachusetts
- Department of Pediatrics, Division of Pediatric Neurology, University of Texas Southwestern, Dallas, Texas
| | - Laurence Faivre
- INSERM U1231, LNC UMR1231 GAD, Burgundy University, Dijon, France
| | | | - Sebastien Moutton
- INSERM U1231, LNC UMR1231 GAD, Burgundy University, Dijon, France
- Department of Medical Genetics, Reference Center for Developmental Anomalies, Bordeaux University Hospital, Bordeaux, France
| | | | - Katelyn Payne
- Department of Neurology, Indiana University School of Medicine, Indianapolis, Indiana
| | - Laurence Walsh
- Department of Neurology, Indiana University School of Medicine, Indianapolis, Indiana
| | | | | | | | | | - Michael F. Buckley
- New South Wales Health Pathology Genomic Laboratory, Prince of Wales Hospital, Randwick, New South Wales, Australia
| | - Paul R. Mark
- Spectrum Health Division of Medical and Molecular Genetics, Grand Rapids, Michigan
| | - Lesley C. Adès
- Department of Paediatrics and Child Health, University of Sydney, Sydney, New South Wales, Australia
- Department of Genetics, The Children’s Hospital at Westmead, Sydney, New South Wales, Australia
| | - Sarah A. Sandaradura
- Department of Paediatrics and Child Health, University of Sydney, Sydney, New South Wales, Australia
- Department of Genetics, The Children’s Hospital at Westmead, Sydney, New South Wales, Australia
| | - James R. Lupski
- Department of Molecular and Human Genetics, Baylor College of Medicine, Houston, Texas
- Human Genome Sequencing Center, Baylor College of Medicine, Houston, Texas
- Department of Pediatrics, Baylor College of Medicine, Houston, Texas
- Department of Pediatrics, Texas Children’s Hospital, Houston, Texas
| | - Tony Roscioli
- New South Wales Health Pathology Genomic Laboratory, Prince of Wales Hospital, Randwick, New South Wales, Australia
- Centre for Clinical Genetics, Sydney Children’s Hospital, Randwick, New South Wales, Australia
- Neuroscience Research Australia, University of New South Wales, Sydney, New South Wales, Australia
| | - Pankaj B. Agrawal
- Divisions of Newborn Medicine and Genetics and Genomics, Manton Center for Orphan Disease Research, Boston Children’s Hospital, Harvard Medical School, Boston, Maryland
| | - Antonie D. Kline
- Harvey Institute for Human Genetics, Greater Baltimore Medical Center, Baltimore, Maryland
| | | | - Kai Wang
- Raymond G. Perelman Center for Cellular and Molecular Therapeutics, Children’s Hospital of Philadelphia, Philadelphia, Pennsylvania
- Department of Pathology and Laboratory Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, Pennsylvania
| | - H. T. Marc Timmers
- German Cancer Consortium (DKTK), Partner Site Freiburg, German Cancer Research Center (DKFZ), Heidelberg, Germany
- Department of Urology, Medical Faculty-University of Freiburg, Freiburg, Germany
| | - Gholson J. Lyon
- Institute for Basic Research in Developmental Disabilities (IBR), Staten Island, New York
- Stanley Institute for Cognitive Genomics, Cold Spring Harbor Laboratory, Cold Spring Harbor, New York
- The Graduate Center, The City University of New York, New York, New York
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47
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Kayembe-Kitenge T, Kasole Lubala T, Musa Obadia P, Katoto Chimusa P, Katshiez Nawej C, Banza Lubaba Nkulu C, Devriendt K, Nemery B. Holoprosencephaly: A case series from an area with high mining-related pollution. Birth Defects Res 2019; 111:1561-1563. [PMID: 31419067 DOI: 10.1002/bdr2.1583] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [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: 06/17/2019] [Revised: 08/03/2019] [Accepted: 08/06/2019] [Indexed: 12/31/2022]
Abstract
BACKGROUND The extraction and processing of copper and cobalt in the African Copperbelt in the Democratic Republic of Congo have led to substantial environmental pollution, causing concerns about possible adverse effects on human health, including birth defects. CASES We report three neonates with clinically diagnosed holoprosencephaly who were part of a case-control study performed in Lubumbashi between February 2013 and February 2015. One mother had a high concentration of uranium in urine, and high manganese concentrations were found in blood of another mother and in cord blood of one infant. Two of the three fathers had a mining-related job. DISCUSSION We hypothesize that these cases of holoprosencephaly were connected to mining-related pollution, possibly via epigenetic alterations induced by paternal occupational exposure to toxic metals.
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Affiliation(s)
- Tony Kayembe-Kitenge
- Unit of Toxicology and Environment, School of Public Health, University of Lubumbashi, Lubumbashi, DR Congo.,Department of Internal Medicine University Hospital, University of Malemba-Nkulu, Malemba-Nkulu, DR Congo.,Centre for Environment and Health, Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium
| | - Toni Kasole Lubala
- Department of Pediatrics, University Hospital, University of Lubumbashi, Lubumbashi, DR Congo
| | - Paul Musa Obadia
- Unit of Toxicology and Environment, School of Public Health, University of Lubumbashi, Lubumbashi, DR Congo.,Department of Internal Medicine University Hospital, University of Malemba-Nkulu, Malemba-Nkulu, DR Congo.,Centre for Environment and Health, Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium
| | - Patrick Katoto Chimusa
- Centre for Environment and Health, Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium.,Department of Internal Medicine, Faculty of Medicine, Catholic University of Bukavu, Bukavu, DR Congo
| | | | - Célestin Banza Lubaba Nkulu
- Unit of Toxicology and Environment, School of Public Health, University of Lubumbashi, Lubumbashi, DR Congo.,Department of Internal Medicine University Hospital, University of Malemba-Nkulu, Malemba-Nkulu, DR Congo
| | - Koenraad Devriendt
- Center for Human Genetics, University Hospital, KU Leuven, Leuven, Belgium
| | - Benoit Nemery
- Centre for Environment and Health, Department of Public Health and Primary Care, KU Leuven, Leuven, Belgium
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48
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Willaert A, Van Eynde C, Verhaert N, Desloovere C, Vander Poorten V, Devriendt K, Swillen A, Hens G. Vestibular dysfunction is a manifestation of 22q11.2 deletion syndrome. Am J Med Genet A 2019; 179:448-454. [DOI: 10.1002/ajmg.a.7] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 10/08/2018] [Accepted: 10/27/2018] [Indexed: 01/14/2023]
Affiliation(s)
- Annelore Willaert
- Department of Otorhinolaryngology‐Head and Neck SurgeryUniversity Hospitals Leuven Leuven Belgium
- Department of NeurosciencesKU Leuven – University of Leuven, ExpORL Leuven Belgium
| | - Charlotte Van Eynde
- Department of Otorhinolaryngology‐Head and Neck SurgeryUniversity Hospitals Leuven Leuven Belgium
| | - Nicolas Verhaert
- Department of Otorhinolaryngology‐Head and Neck SurgeryUniversity Hospitals Leuven Leuven Belgium
- Department of NeurosciencesKU Leuven – University of Leuven, ExpORL Leuven Belgium
| | - Christian Desloovere
- Department of Otorhinolaryngology‐Head and Neck SurgeryUniversity Hospitals Leuven Leuven Belgium
| | - Vincent Vander Poorten
- Department of Otorhinolaryngology‐Head and Neck SurgeryUniversity Hospitals Leuven Leuven Belgium
| | - Koenraad Devriendt
- Department of Human Genetics, University of Leuven, Centre for Human GeneticsUniversity Hospitals Leuven Leuven Belgium
| | - Ann Swillen
- Department of Human Genetics, University of Leuven, Centre for Human GeneticsUniversity Hospitals Leuven Leuven Belgium
| | - Greet Hens
- Department of Otorhinolaryngology‐Head and Neck SurgeryUniversity Hospitals Leuven Leuven Belgium
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49
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Muys J, Blaumeiser B, Jacquemyn Y, Bandelier C, Brison N, Bulk S, Chiarappa P, Courtens W, De Leener A, De Rademaeker M, Désir J, Destrée A, Devriendt K, Dheedene A, Fieuw A, Fransen E, Gatot JS, Holmgren P, Jamar M, Janssens S, Keymolen K, Lederer D, Menten B, Meuwissen M, Parmentier B, Pichon B, Rombout S, Sznajer Y, Van Den Bogaert A, Van Den Bogaert K, Vanakker O, Vermeesch J, Janssens K. The Belgian MicroArray Prenatal (BEMAPRE) database: A systematic nationwide repository of fetal genomic aberrations. Prenat Diagn 2018; 38:1120-1128. [PMID: 30334587 DOI: 10.1002/pd.5373] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Revised: 10/01/2018] [Accepted: 10/04/2018] [Indexed: 12/18/2022]
Abstract
OBJECTIVE With the replacement of karyotyping by chromosomal microarray (CMA) in invasive prenatal diagnosis, new challenges have arisen. By building a national database, we standardize the classification and reporting of prenatally detected copy number variants (CNVs) across Belgian genetic centers. This database, which will link genetic and ultrasound findings with postnatal development, forms a unique resource to investigate the pathogenicity of variants of uncertain significance and to refine the phenotypic spectrum of pathogenic and susceptibility CNVs. METHODS The Belgian MicroArray Prenatal (BEMAPRE) consortium is a collaboration of all genetic centers in Belgium. We collected data from all invasive prenatal procedures performed between May 2013 and July 2016. RESULTS In this three-year period, 13 266 prenatal CMAs were performed. By national agreement, a limited number of susceptibility CNVs and no variants of uncertain significance were reported. Added values for using CMA versus conventional karyotyping were 1.8% in the general invasive population and 2.7% in cases with an ultrasound anomaly. Of the reported CNVs, 31.5% would have remained undetected with non-invasive prenatal test as the first-tier test. CONCLUSION The establishment of a national database for prenatal CNV data allows for a uniform reporting policy and the investigation of the prenatal and postnatal genotype-phenotype correlation.
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Affiliation(s)
- Joke Muys
- Department of Obstetrics and Gynaecology, University Hospital Antwerp, Edegem, Belgium.,Center for Medical Genetics, Universiteit Antwerpen, Antwerp, Belgium
| | - Bettina Blaumeiser
- Center for Medical Genetics, Universiteit Antwerpen, Antwerp, Belgium.,Department of Medical Genetics, University Hospital Antwerp, Edegem, Belgium
| | - Yves Jacquemyn
- Department of Obstetrics and Gynaecology, University Hospital Antwerp, Edegem, Belgium
| | - Claude Bandelier
- Center for Medical Genetics, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Nathalie Brison
- Center for Medical Genetics, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Saskia Bulk
- Center for Medical Genetics, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Patrizia Chiarappa
- Center for Medical Genetics, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Winnie Courtens
- Center for Medical Genetics, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Anne De Leener
- Center for Medical Genetics, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | - Marjan De Rademaeker
- Department of Medical Genetics, University Hospital Antwerp, Edegem, Belgium.,Center for Medical Genetics, Vrije Universiteit Brussel, Brussels, Belgium
| | - Julie Désir
- Center for Medical Genetics, Université Libre de Bruxelles, Brussels, Belgium
| | - Anne Destrée
- Center for Medical Genetics, Institut de Pathologie et de Génétique Gosselies, Charleroi, Belgium
| | - Koenraad Devriendt
- Center for Medical Genetics, Katholieke Universiteit Leuven, Leuven, Belgium
| | | | - Annelies Fieuw
- Center for Medical Genetics, Vrije Universiteit Brussel, Brussels, Belgium
| | - Erik Fransen
- Center for Medical Genetics, Universiteit Antwerpen, Antwerp, Belgium
| | - Jean-Stéphane Gatot
- Center for Medical Genetics, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Philip Holmgren
- Center for Medical Genetics, Universiteit Antwerpen, Antwerp, Belgium
| | - Mauricette Jamar
- Center for Medical Genetics, Centre Hospitalier Universitaire de Liège, Liège, Belgium
| | - Sandra Janssens
- Center for Medical Genetics, Universiteit Gent, Ghent, Belgium
| | - Kathelijn Keymolen
- Center for Medical Genetics, Vrije Universiteit Brussel, Brussels, Belgium
| | - Damien Lederer
- Center for Medical Genetics, Institut de Pathologie et de Génétique Gosselies, Charleroi, Belgium
| | - Björn Menten
- Center for Medical Genetics, Universiteit Gent, Ghent, Belgium
| | - Marije Meuwissen
- Center for Medical Genetics, Universiteit Antwerpen, Antwerp, Belgium
| | - Benoit Parmentier
- Center for Medical Genetics, Institut de Pathologie et de Génétique Gosselies, Charleroi, Belgium
| | - Bruno Pichon
- Center for Medical Genetics, Université Libre de Bruxelles, Brussels, Belgium
| | - Sonia Rombout
- Center for Medical Genetics, Institut de Pathologie et de Génétique Gosselies, Charleroi, Belgium
| | - Yves Sznajer
- Center for Medical Genetics, Université Catholique de Louvain, Louvain-la-Neuve, Belgium
| | | | | | | | - Joris Vermeesch
- Center for Medical Genetics, Katholieke Universiteit Leuven, Leuven, Belgium
| | - Katrien Janssens
- Center for Medical Genetics, Universiteit Antwerpen, Antwerp, Belgium
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50
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Schreurs L, Lannoo L, De Catte L, Van Schoubroeck D, Devriendt K, Richter J. First trimester cystic hygroma colli: Retrospective analysis in a tertiary center. Eur J Obstet Gynecol Reprod Biol 2018; 231:60-64. [PMID: 30321790 DOI: 10.1016/j.ejogrb.2018.10.019] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [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: 09/04/2018] [Revised: 10/02/2018] [Accepted: 10/06/2018] [Indexed: 12/14/2022]
Abstract
OBJECTIVE This retrospective study aims to evaluate the incidence, presence of chromosomal anomalies and outcome of fetuses diagnosed with cystic hygroma colli in the first trimester in a single tertiary center. STUDY DESIGN A retrospective study was performed over a ten-years period from 2007 to 2017 of all fetuses with a first-trimester diagnosis of cystic hygroma. Maternal and fetal parameters were assessed with descriptive statistics. RESULTS A total of 185 singleton pregnancies were included. Chromosomal anomalies were present in 122 cases (65.9%). Sixty-three fetuses (34.1%) had a normal karyotype. Noonan syndrome was diagnosed in 6 cases using additional testing for RASopathies. In euploid fetuses, a major congenital anomaly was detected in 35 of 63 cases (56%) and if present, 91.4% had an abnormal fetal outcome compared to 32.1% if no structural anomaly was found (p < 0.01). Fetuses with a nuchal translucency thickness more than 10 mm and hydropic fetuses had a worse outcome. DISCUSSION Associated structural anomalies or hydrops fetalis are significant predictors for an abnormal outcome in pregnancies with first-trimester cystic hygroma and a normal karyotype. Cytogenetic evaluation and detailed sonographic evaluation are of great importance in the determination of the prognosis of pregnancies complicated by first-trimester cystic hygroma.
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Affiliation(s)
- Lore Schreurs
- Department of obstetrics and gynecology, University Hospitals Leuven, Leuven, Belgium
| | - Lore Lannoo
- Department of obstetrics and gynecology, University Hospitals Leuven, Leuven, Belgium
| | - Luc De Catte
- Department of obstetrics and gynecology, University Hospitals Leuven, Leuven, Belgium
| | | | | | - Jute Richter
- Department of obstetrics and gynecology, University Hospitals Leuven, Leuven, Belgium.
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