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Mary L, Fradin M, Pasquier L, Quelin C, Loget P, Le Lous M, Le Bouar G, Nivot-Adamiak S, Lokchine A, Dubourg C, Jauffret V, Nouyou B, Henry C, Launay E, Odent S, Jaillard S, Belaud-Rotureau MA. Role of chromosomal imbalances in the pathogenesis of DSD: A retrospective analysis of 115 prenatal samples. Eur J Med Genet 2023; 66:104748. [PMID: 36948288 DOI: 10.1016/j.ejmg.2023.104748] [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: 09/16/2022] [Revised: 03/10/2023] [Accepted: 03/18/2023] [Indexed: 03/24/2023]
Abstract
Differences of sex development (DSDs) are a group of congenital conditions characterized by a discrepancy between chromosomal, gonadal, and genital sex development of an individual, with significant impact on medical, psychological and reproductive life. The genetic heterogeneity of DSDs complicates the diagnosis and almost half of the patients remains undiagnosed. In this context, chromosomal imbalances in syndromic DSD patients may help to identify new genes implicated in DSDs. In this study, we aimed at describing the burden of chromosomal imbalances including submicroscopic ones (copy number variants or CNVs) in a cohort of prenatal syndromic DSD patients, and review their role in DSDs. Our patients carried at least one pathogenic or likely pathogenic chromosomal imbalance/CNV or low-level mosaicism for aneuploidy. Almost half of the cases resulted from an unbalanced chromosomal rearrangement. Chromosome 9p/q, 4p/q, 3q and 11q anomalies were more frequently observed. Review of the literature confirmed the causative role of CNVs in DSDs, either in disruption of known DSD-causing genes (SOX9, NR0B1, NR5A1, AR, ATRX, …) or as a tool to suspect new genes in DSDs (HOXD cluster, ADCY2, EMX2, CAMK1D, …). Recurrent CNVs of regulatory elements without coding sequence content (i.e. duplications/deletions upstream of SOX3 or SOX9) confirm detection of CNVs as a mean to explore our non-coding genome. Thus, CNV detection remains a powerful tool to explore undiagnosed DSDs, either through routine techniques or through emerging technologies such as long-read whole genome sequencing or optical genome mapping.
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Affiliation(s)
- L Mary
- CHU Rennes, Service de Cytogénétique et Biologie Cellulaire, F-35033, Rennes, France; Univ Rennes, CHU Rennes, Inserm, EHESP, Irset, UMR_S, 1085, F-35000, Rennes, France.
| | - M Fradin
- Service de Génétique Clinique, Centre de Référence Anomalies Du Développement, CLAD Ouest, CHU Rennes, Rennes, France
| | - L Pasquier
- Service de Génétique Clinique, Centre de Référence Anomalies Du Développement, CLAD Ouest, CHU Rennes, Rennes, France; Université de Rennes, IGDR (Institut de Génétique et Développement), CNRS UMR 6290, INSERM ERL 1305, Rennes, France
| | - C Quelin
- Service de Génétique Clinique, Centre de Référence Anomalies Du Développement, CLAD Ouest, CHU Rennes, Rennes, France
| | - P Loget
- Service D'Anatomie Pathologique, Hôpital Pontchaillou, CHU Rennes, Rennes, France
| | - M Le Lous
- Unité de Médecine Fœtale, Service de Gynécologie-Obstétrique, CHU Rennes, Rennes, France
| | - G Le Bouar
- Unité de Médecine Fœtale, Service de Gynécologie-Obstétrique, CHU Rennes, Rennes, France
| | - S Nivot-Adamiak
- Service D'endocrinologie Pédiatrique, CHU Rennes, Rennes, France
| | - A Lokchine
- CHU Rennes, Service de Cytogénétique et Biologie Cellulaire, F-35033, Rennes, France
| | - C Dubourg
- Université de Rennes, IGDR (Institut de Génétique et Développement), CNRS UMR 6290, INSERM ERL 1305, Rennes, France; Service de Génétique Moléculaire et Génomique, CHU de Rennes, Rennes, 35033, France
| | - V Jauffret
- CHU Rennes, Service de Cytogénétique et Biologie Cellulaire, F-35033, Rennes, France
| | - B Nouyou
- CHU Rennes, Service de Cytogénétique et Biologie Cellulaire, F-35033, Rennes, France
| | - C Henry
- CHU Rennes, Service de Cytogénétique et Biologie Cellulaire, F-35033, Rennes, France
| | - E Launay
- CHU Rennes, Service de Cytogénétique et Biologie Cellulaire, F-35033, Rennes, France
| | - S Odent
- Service de Génétique Clinique, Centre de Référence Anomalies Du Développement, CLAD Ouest, CHU Rennes, Rennes, France; Université de Rennes, IGDR (Institut de Génétique et Développement), CNRS UMR 6290, INSERM ERL 1305, Rennes, France
| | - S Jaillard
- CHU Rennes, Service de Cytogénétique et Biologie Cellulaire, F-35033, Rennes, France; Univ Rennes, CHU Rennes, Inserm, EHESP, Irset, UMR_S, 1085, F-35000, Rennes, France
| | - M A Belaud-Rotureau
- CHU Rennes, Service de Cytogénétique et Biologie Cellulaire, F-35033, Rennes, France; Univ Rennes, CHU Rennes, Inserm, EHESP, Irset, UMR_S, 1085, F-35000, Rennes, France
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Caillault L, Garlantézec R, Le Lous M, Le Bouar G, Loget P, Cauchois A, Quelin C, Plesse C, Lescoat A, Beranger R, Belhomme N. Rôle de l’interniste dans la démarche diagnostique et la prise en charge des morts fœtales in utero : l’expérience d’un registre multicentrique de MFIU entre 2010 et 2019. Rev Med Interne 2022. [DOI: 10.1016/j.revmed.2022.10.016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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Mouillé M, Rio M, Breton S, Piketty ML, Afenjar A, Amiel J, Capri Y, Goldenberg A, Francannet C, Michot C, Mignot C, Perrin L, Quelin C, Van Gils J, Barcia G, Pingault V, Maruani G, Koumakis E, Cormier-Daire V. SATB2-associated syndrome: characterization of skeletal features and of bone fragility in a prospective cohort of 19 patients. Orphanet J Rare Dis 2022; 17:100. [PMID: 35241104 PMCID: PMC8895909 DOI: 10.1186/s13023-022-02229-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 02/06/2022] [Indexed: 11/10/2022] Open
Abstract
Background Individuals with pathogenic variants in SATB2 display intellectual disability, speech and behavioral disorders, dental abnormalities and often features of Pierre Robin sequence. SATB2 encodes a transcription factor thought to play a role in bone remodeling. The primary aim of our study was to systematically review the skeletal manifestations of SATB2-associated syndrome. For this purpose, we performed a non-interventional, multicenter cohort study, from 2017 to 2018. We included 19 patients, 9 females and 10 males ranging in age from 2 to 19 years-old. The following data were collected prospectively for each patient: clinical data, bone markers and calcium and phosphate metabolism parameters, skeletal X-rays and bone mineral density. Results Digitiform impressions were present in 8/14 patients (57%). Vertebral compression fractures affected 6/17 patients (35%). Skeletal demineralization (16/17, 94%) and cortical thinning of vertebrae (15/17) were the most frequent radiological features at the spine. Long bones were generally demineralized (18/19). The distal phalanges were short, thick and abnormally shaped. C-telopeptide (CTX) and Alkaline phosphatase levels were in the upper normal values and osteocalcin and serum procollagen type 1 amino-terminal propeptide (P1NP) were both increased. Vitamin D insufficiency was frequent (66.7%). Conclusion We conclude that SATB2 pathogenic variants are responsible for skeletal demineralization and osteoporosis. We found increased levels of bone formation markers, supporting the key role of SATB2 in osteoblast differentiation. These results support the need for bone evaluation in children and adult patients with SATB2-associated syndrome (SAS). Supplementary Information The online version contains supplementary material available at 10.1186/s13023-022-02229-5.
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Affiliation(s)
- M Mouillé
- Clinical Genetics, Necker Enfants Malades Hospital, APHP, 149 rue de Sevres, Paris, 75015, France.,Department of Neonatal Medicine, Cochin-Port Royal Hospital, APHP, Paris, France
| | - M Rio
- Clinical Genetics, Necker Enfants Malades Hospital, APHP, 149 rue de Sevres, Paris, 75015, France
| | - S Breton
- Department of Pediatric Radiology, Necker Enfants Malades Hospital, APHP, Paris, France
| | - M L Piketty
- Functional Exploration Laboratory, Necker Enfants Malades Hospital, APHP, Paris, France
| | - A Afenjar
- Sorbonne University, Reference Center for Intellectual Disabilities, Department of Genetics and Medical Embryology, Armand-Trousseau Hospital, APHP, Paris, France
| | - J Amiel
- Clinical Genetics, Necker Enfants Malades Hospital, APHP, 149 rue de Sevres, Paris, 75015, France
| | - Y Capri
- Clinical Genetics Functional Unit, Robert Debré Hospital, APHP, Paris, France
| | | | - C Francannet
- Clinical Genetics, Clermont-Ferrand CHU, Clermont-Ferrand, France
| | - C Michot
- Clinical Genetics, Necker Enfants Malades Hospital, APHP, 149 rue de Sevres, Paris, 75015, France.,Paris Cité University, Reference Center for Constitutional Bone Diseases, INSERM UMR1163, Imagine Institute, Paris, France
| | - C Mignot
- Sorbonne University, Reference Center for Intellectual Disabilities, Department of Genetics and Medical Embryology, Armand-Trousseau Hospital, APHP, Paris, France.,Clinical Genetics, La Pitié Salpétrière Hospital, APHP, Paris, France
| | - L Perrin
- Clinical Genetics Functional Unit, Robert Debré Hospital, APHP, Paris, France
| | - C Quelin
- Clinical Genetics, Hospital Sud, Rennes, France
| | - J Van Gils
- Clinical Genetics, Hospital Pellegrin, Bordeaux, France
| | - G Barcia
- Molecular Genetics, Necker Enfants Malades Hospital, APHP, Paris, France
| | - V Pingault
- Molecular Genetics, Necker Enfants Malades Hospital, APHP, Paris, France
| | - G Maruani
- Department of Physiology, Hôpital Necker Enfants Malades and Hôpital Européen Georges Pompidou, AP-HP, Paris, France
| | - E Koumakis
- Paris Cité University, Reference Center for Constitutional Bone Diseases, INSERM UMR1163, Imagine Institute, Paris, France.,Reference Center for Skeletal Dysplasia, Cochin Hospital, APHP, Paris, France
| | - V Cormier-Daire
- Clinical Genetics, Necker Enfants Malades Hospital, APHP, 149 rue de Sevres, Paris, 75015, France. .,Paris Cité University, Reference Center for Constitutional Bone Diseases, INSERM UMR1163, Imagine Institute, Paris, France.
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Deloison B, Sonigo P, Millischer-Bellaiche AE, Quibel T, Cavallin M, Benoist G, Quelin C, Jouk PS, Lev D, Alison M, Baumann C, Beldjord C, Razavi F, Bessières B, Boddaert N, Ville Y, Salomon LJ, Bahi-Buisson N. Prenatally diagnosed periventricular nodular heterotopia: Further delineation of the imaging phenotype and outcome. Eur J Med Genet 2018; 61:773-782. [PMID: 30391507 DOI: 10.1016/j.ejmg.2018.10.015] [Citation(s) in RCA: 5] [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: 11/17/2017] [Revised: 10/24/2018] [Accepted: 10/28/2018] [Indexed: 12/22/2022]
Abstract
OBJECTIVES Periventricular nodular heterotopia (PNH) is a malformation of cortical development which presents with heterogeneous imaging, neurological phenotype and outcome. There is a paucity of comprehensive description detailing the prenatal diagnosis of PNH. The aim of this study is to report neuroimaging features and correlated outcomes in order to delineate the spectrum of prenatally diagnosed PNH. METHODS It was a retrospective study over 15 years in five tertiary centers. All fetuses with prenatally diagnosed PNH were collected. Fetal ultrasound and MRI were reviewed and genetic screening collected. Prenatal findings were analyzed in correlation to fetopathological analyses and post-natal follow up. RESULTS Thirty fetuses (22 females and 8 males) with PNH were identified. The two major ultrasound signs were ventriculomegaly associated with dysmorphic frontal horns (60%) and posterior fossa anomalies (73.3%). On MRI, two groups of PNH were identified: the contiguous and diffuse PNH (n = 15, 50%), often associated with megacisterna magna, and the non-diffuse, either anterior, posterior or unilateral PNH. FLNA mutations were found in 6/11 cases with diffuse PNH. Additional cortical malformations were exclusively observed in non diffuse PNH (9/15; 60%). Twenty-four pregnancies (80%) were terminated. Six children aged 6 months to 5 years are alive. Five have normal neurodevelopment (all had diffuse PNH) whereas one case with non diffuse PNH has developmental delay and epilepsy. CONCLUSION PNH is heterogeneous but patients with diffuse PNH are a common subgroup with specific findings on prenatal imaging and implications for prenatal counseling.
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Affiliation(s)
- B Deloison
- Department of Obstetrics and Gynecology and SFAPE Société Française pour l'Amélioration des Pratiques Echographiques, Necker Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France; Université Paris Descartes - Sorbonne Paris Cités, France; EA 7328 FETUS, Université Paris Descartes, France
| | - P Sonigo
- Pediatric Radiology, Necker Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - A E Millischer-Bellaiche
- Pediatric Radiology, Necker Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - T Quibel
- Department of Obstetrics and Gynecology, Poissy Saint-Germain Hospital, Poissy, France
| | - M Cavallin
- Université Paris Descartes - Sorbonne Paris Cités, France; Institut Imagine-INSERM UMR-1163, Embryology and genetics of congenital malformations, France; Pediatric Neurology, Necker Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - G Benoist
- Department of Obstetrics and Gynecology, Caen Hospital, Caen Basse Normandie University, France
| | - C Quelin
- Clinical Genetic Department, Rennes Hospital, France
| | - P S Jouk
- Clinical Genetic Department, Grenoble Hospital, France
| | - D Lev
- Institute of Medical Genetics, Wolfson Medical Center, Holon, Israel
| | - M Alison
- Pediatric Radiology, Robert Debre Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - C Baumann
- Clinical Genetics Department, Robert Debre Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - C Beldjord
- Department of Molecular Genetics, Cochin-Port-Royal Université Paris Descartes - Sorbonne Paris Cités, Paris, France
| | - F Razavi
- Fetopathology Necker Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - B Bessières
- Fetopathology Necker Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - N Boddaert
- Université Paris Descartes - Sorbonne Paris Cités, France; Pediatric Radiology, Necker Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Y Ville
- Department of Obstetrics and Gynecology and SFAPE Société Française pour l'Amélioration des Pratiques Echographiques, Necker Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France; Université Paris Descartes - Sorbonne Paris Cités, France; EA 7328 FETUS, Université Paris Descartes, France
| | - L J Salomon
- Department of Obstetrics and Gynecology and SFAPE Société Française pour l'Amélioration des Pratiques Echographiques, Necker Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France; Université Paris Descartes - Sorbonne Paris Cités, France; EA 7328 FETUS, Université Paris Descartes, France
| | - N Bahi-Buisson
- Université Paris Descartes - Sorbonne Paris Cités, France; Institut Imagine-INSERM UMR-1163, Embryology and genetics of congenital malformations, France; Pediatric Neurology, Necker Enfants Malades Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France.
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5
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Ranza E, Huber C, Levin N, Baujat G, Bole-Feysot C, Nitschke P, Masson C, Alanay Y, Al-Gazali L, Bitoun P, Boute O, Campeau P, Coubes C, McEntagart M, Elcioglu N, Faivre L, Gezdirici A, Johnson D, Mihci E, Nur BG, Perrin L, Quelin C, Terhal P, Tuysuz B, Cormier-Daire V. Chondrodysplasia with multiple dislocations: comprehensive study of a series of 30 cases. Clin Genet 2017; 91:868-880. [PMID: 28229453 DOI: 10.1111/cge.12885] [Citation(s) in RCA: 7] [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] [Received: 08/17/2016] [Revised: 10/05/2016] [Accepted: 10/08/2016] [Indexed: 11/28/2022]
Abstract
The group of chondrodysplasia with multiple dislocations includes several entities, characterized by short stature, dislocation of large joints, hand and/or vertebral anomalies. Other features, such as epiphyseal or metaphyseal changes, cleft palate, intellectual disability are also often part of the phenotype. In addition, several conditions with overlapping features are related to this group and broaden the spectrum. The majority of these disorders have been linked to pathogenic variants in genes encoding proteins implicated in the synthesis or sulfation of proteoglycans (PG). In a series of 30 patients with multiple dislocations, we have performed exome sequencing and subsequent targeted analysis of 15 genes, implicated in chondrodysplasia with multiple dislocations, and related conditions. We have identified causative pathogenic variants in 60% of patients (18/30); when a clinical diagnosis was suspected, this was molecularly confirmed in 53% of cases. Forty percent of patients remain without molecular etiology. Pathogenic variants in genes implicated in PG synthesis are of major importance in chondrodysplasia with multiple dislocations and related conditions. The combination of hand features, growth failure severity, radiological aspects of long bones and of vertebrae allowed discrimination among the different conditions. We propose key diagnostic clues to the clinician.
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Affiliation(s)
- E Ranza
- Department of Genetics, INSERM UMR1163, Université Paris Descartes-Sorbonne Paris Cité, Institut Imagine, Hôpital Necker Enfants Malades (AP-HP), Paris, France.,Service of Genetic Medicine, University Hospitals of Geneva, Geneva, Switzerland
| | - C Huber
- Department of Genetics, INSERM UMR1163, Université Paris Descartes-Sorbonne Paris Cité, Institut Imagine, Hôpital Necker Enfants Malades (AP-HP), Paris, France
| | - N Levin
- Department of Genetics, INSERM UMR1163, Université Paris Descartes-Sorbonne Paris Cité, Institut Imagine, Hôpital Necker Enfants Malades (AP-HP), Paris, France
| | - G Baujat
- Department of Genetics, INSERM UMR1163, Université Paris Descartes-Sorbonne Paris Cité, Institut Imagine, Hôpital Necker Enfants Malades (AP-HP), Paris, France
| | - C Bole-Feysot
- Plateforme de génomique, Fondation IMAGINE, Paris, France
| | - P Nitschke
- Plateforme de Bioinformatique, Université Paris Descartes, Paris, France
| | - C Masson
- Plateforme de Bioinformatique, Université Paris Descartes, Paris, France
| | - Y Alanay
- School of Medicine, Department of Pediatrics, Pediatric Genetics Unit, Acibadem University, Istanbul, Turkey
| | - L Al-Gazali
- Department of Pediatrics, College of Medicine and Health Sciences, UAE University, Al Ain, United Arab Emirates
| | - P Bitoun
- Génétique Médicale, Hôpital Jean Verdier, Bondy, France
| | - O Boute
- Génétique Clinique, Hôpital Jeanne de Flandre, Lille, France
| | - P Campeau
- Division of Medical genetics, Department of Pediatrics, CHU Sainte Justine and University of Montreal, Montreal, Quebec, Canada
| | - C Coubes
- Département de Génétique Médicale, Hôpital Arnaud de Villeneuve, Montpellier, France
| | - M McEntagart
- Medical Genetics, St George's Healthcare NHS Trust, London, UK
| | - N Elcioglu
- Department of Pediatric Genetics, Marmara University Medical School, Istanbul, Turkey
| | - L Faivre
- Centre de Référence Anomalies du Développement et Syndromes Malformatifs et FHU TRANSLAD, CHU de Dijon et Université de Bourgogne, Dijon, France
| | - A Gezdirici
- Department of Medical Genetics, Kanuni Sultan Suleyman Training and Research Hospital, Istanbul, Turkey
| | - D Johnson
- Sheffield Clinical Genetics Service, Sheffield Children's Hospital, Sheffield, UK
| | - E Mihci
- Akdeniz University School of Medicine, Division of Pediatric Genetics, Antalya, Turkey
| | - B G Nur
- Akdeniz University School of Medicine, Division of Pediatric Genetics, Antalya, Turkey
| | - L Perrin
- Unité de Génétique Clinique, Hopital Robert Debré, Paris, France
| | - C Quelin
- Génétique Médicale, Hôpital Sud, Rennes, France
| | - P Terhal
- University Medical Center, Wilhelmina Childrens Hospital, Utrecht, the Netherlands
| | - B Tuysuz
- Cerrahpasa Medical Faculty, Department of Pediatric Genetics, Istanbul University, Istanbul, Turkey
| | - V Cormier-Daire
- Department of Genetics, INSERM UMR1163, Université Paris Descartes-Sorbonne Paris Cité, Institut Imagine, Hôpital Necker Enfants Malades (AP-HP), Paris, France
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Mouden C, Dubourg C, Carré W, Rose S, Quelin C, Akloul L, Hamdi-Rozé H, Viot G, Salhi H, Darnault P, Odent S, Dupé V, David V. Complex mode of inheritance in holoprosencephaly revealed by whole exome sequencing. Clin Genet 2016; 89:659-68. [DOI: 10.1111/cge.12722] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2015] [Revised: 12/28/2015] [Accepted: 12/30/2015] [Indexed: 12/12/2022]
Affiliation(s)
- C. Mouden
- UMR6290 Institut de Génétique et Développement de Rennes; Université de Rennes 1; Rennes France
| | - C. Dubourg
- UMR6290 Institut de Génétique et Développement de Rennes; Université de Rennes 1; Rennes France
- Laboratoire de Génétique Moléculaire et Génomique; C.H.U. de Rennes; Rennes France
| | - W. Carré
- Laboratoire de Génétique Moléculaire et Génomique; C.H.U. de Rennes; Rennes France
| | - S. Rose
- UMR1085 Institut de Recherche sur la Santé, l'Environnement et le Travail; Université de Rennes 1; Rennes France
| | - C. Quelin
- Service de Génétique Clinique; C.H.U. de Rennes; Rennes France
| | - L. Akloul
- Service de Génétique Clinique; C.H.U. de Rennes; Rennes France
| | - H. Hamdi-Rozé
- UMR6290 Institut de Génétique et Développement de Rennes; Université de Rennes 1; Rennes France
- Laboratoire de Génétique Moléculaire et Génomique; C.H.U. de Rennes; Rennes France
| | - G. Viot
- Service de Génétique Médicale; Maternité Port Royal; Paris France
| | - H. Salhi
- Foetopathologie et Anatomie Pathologique Pédiatrique; Hôpital Cochin; Paris France
| | - P. Darnault
- Service de Radiologie et Imagerie Médicale; C.H.U. de Rennes; Rennes France
| | - S. Odent
- UMR6290 Institut de Génétique et Développement de Rennes; Université de Rennes 1; Rennes France
- Service de Génétique Clinique; C.H.U. de Rennes; Rennes France
| | - V. Dupé
- UMR6290 Institut de Génétique et Développement de Rennes; Université de Rennes 1; Rennes France
| | - V. David
- UMR6290 Institut de Génétique et Développement de Rennes; Université de Rennes 1; Rennes France
- Laboratoire de Génétique Moléculaire et Génomique; C.H.U. de Rennes; Rennes France
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Chassaing N, Causse A, Vigouroux A, Delahaye A, Alessandri JL, Boespflug-Tanguy O, Boute-Benejean O, Dollfus H, Duban-Bedu B, Gilbert-Dussardier B, Giuliano F, Gonzales M, Holder-Espinasse M, Isidor B, Jacquemont ML, Lacombe D, Martin-Coignard D, Mathieu-Dramard M, Odent S, Picone O, Pinson L, Quelin C, Sigaudy S, Toutain A, Thauvin-Robinet C, Kaplan J, Calvas P. Molecular findings and clinical data in a cohort of 150 patients with anophthalmia/microphthalmia. Clin Genet 2013; 86:326-34. [PMID: 24033328 DOI: 10.1111/cge.12275] [Citation(s) in RCA: 75] [Impact Index Per Article: 6.8] [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: 07/12/2013] [Revised: 09/03/2013] [Accepted: 09/05/2013] [Indexed: 11/27/2022]
Abstract
Anophthalmia and microphthalmia (AM) are the most severe malformations of the eye, corresponding respectively to reduced size or absent ocular globe. Wide genetic heterogeneity has been reported and different genes have been demonstrated to be causative of syndromic and non-syndromic forms of AM. We screened seven AM genes [GDF6 (growth differentiation factor 6), FOXE3 (forkhead box E3), OTX2 (orthodenticle protein homolog 2), PAX6 (paired box 6), RAX (retina and anterior neural fold homeobox), SOX2 (SRY sex determining region Y-box 2), and VSX2 (visual system homeobox 2 gene)] in a cohort of 150 patients with isolated or syndromic AM. The causative genetic defect was identified in 21% of the patients (32/150). Point mutations were identified by direct sequencing of these genes in 25 patients (13 in SOX2, 4 in RAX, 3 in OTX2, 2 in FOXE3, 1 in VSX2, 1 in PAX6, and 1 in GDF6). In addition eight gene deletions (five SOX2, two OTX2 and one RAX) were identified using a semi-quantitative multiplex polymerase chain reaction (PCR) [quantitative multiplex PCR amplification of short fluorescent fragments (QMPSF)]. The causative genetic defect was identified in 21% of the patients. This result contributes to our knowledge of the molecular basis of AM, and will facilitate accurate genetic counselling.
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Affiliation(s)
- N Chassaing
- Service de Génétique Médicale, Hôpital Purpan, CHU Toulouse, Toulouse, France; Université Paul-Sabatier Toulouse III, Toulouse, France
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Démurger F, Pasquier L, Dubourg C, Dupé V, Gicquel I, Evain C, Ratié L, Jaillard S, Beri M, Leheup B, Lespinasse J, Martin-Coignard D, Mercier S, Quelin C, Loget P, Marcorelles P, Laquerrière A, Bendavid C, Odent S, David V. Array-CGH Analysis Suggests Genetic Heterogeneity in Rhombencephalosynapsis. Mol Syndromol 2013; 4:267-72. [PMID: 24167461 DOI: 10.1159/000353878] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/17/2013] [Indexed: 11/19/2022] Open
Abstract
Rhombencephalosynapsis is an uncommon, but increasingly recognized, cerebellar malformation defined as vermian agenesis with fusion of the hemispheres. The embryologic and genetic mechanisms involved are still unknown, and to date, no animal models are available. In the present study, we used Agilent oligonucleotide arrays in a large series of 57 affected patients to detect candidate genes. Four different unbalanced rearrangements were detected: a 16p11.2 deletion, a 14q12q21.2 deletion, an unbalanced translocation t(2p;10q), and a 16p13.11 microdeletion containing 2 candidate genes. These genes were further investigated by sequencing and in situ hybridization. This first microarray screening of a rhombencephalosynapsis series suggests that there may be heterogeneous genetic causes.
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Affiliation(s)
- F Démurger
- Service de Génétique Clinique, CHU Hôpital Sud, Rouen, France ; Equipe Génétique des Pathologies Liées au Développement, UMR 6290 CNRS, IFR 140 GFAS, Université de Rennes 1, Faculté de Médecine, and Laboratoires de, Rouen, France
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