1
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Yang L, Wu G, Yin H, Pan M, Zhu Y. Periventricular nodular heterotopias is associated with mutation at the FLNA locus-a case history and a literature review. BMC Pediatr 2023; 23:346. [PMID: 37422633 PMCID: PMC10329368 DOI: 10.1186/s12887-023-04161-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/09/2022] [Accepted: 06/27/2023] [Indexed: 07/10/2023] Open
Abstract
BACKGROUND Periventricular nodular heterotopia (PNH), associated with FLNA mutations, is a rare clinical condition potentially associated with multiple systemic conditions, including cardiac, pulmonary, skeletal, and cutaneous diseases. However, due to a paucity of information in the literature, accurate prognostic advice cannot be provided to patients with the disease. CASE PRESENTATION We report a 2-year-old female whose PNH was associated with a nonsense mutation in the q28 region of the X chromosome, in exon 31 of FLNA (c.5159dupA). The patient is currently seizure-free and has no congenital heart disease, lung disease or skeletal or joint issues, and her development is normal. CONCLUSIONS FLNA-associated PNH is a genetically-heterogeneous disease, and the FLNA mutation, c.5159dupA (p.Tyr1720*) is a newly identified pathogenic variant. FLNA characterization will help the clinical diagnosis and treatment of PNH and provide individualized genetic counseling for patients.
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Affiliation(s)
- Lin Yang
- Pediatric Department, The Affiliated Hospital of Hangzhou Normal University, No. 126 Wenzhou Road, Hangzhou, Zhejiang 310000 China
| | - GuangSheng Wu
- Pediatric Department, The Affiliated Hospital of Hangzhou Normal University, No. 126 Wenzhou Road, Hangzhou, Zhejiang 310000 China
| | - HuiMei Yin
- Pediatric Department, The Affiliated Hospital of Hangzhou Normal University, No. 126 Wenzhou Road, Hangzhou, Zhejiang 310000 China
| | - MengLan Pan
- Pediatric Department, The Affiliated Hospital of Hangzhou Normal University, No. 126 Wenzhou Road, Hangzhou, Zhejiang 310000 China
| | - YaFei Zhu
- Pediatric Department, The Affiliated Hospital of Hangzhou Normal University, No. 126 Wenzhou Road, Hangzhou, Zhejiang 310000 China
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2
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Gerlevik U, Saygı C, Cangül H, Kutlu A, Çaralan EF, Topçu Y, Özören N, Sezerman OU. Computational analysis of missense filamin-A variants, including the novel p.Arg484Gln variant of two brothers with periventricular nodular heterotopia. PLoS One 2022; 17:e0265400. [PMID: 35613087 PMCID: PMC9132340 DOI: 10.1371/journal.pone.0265400] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2021] [Accepted: 03/01/2022] [Indexed: 12/01/2022] Open
Abstract
Background Periventricular nodular heterotopia (PNH) is a cell migration disorder associated with mutations in Filamin-A (FLNA) gene on chromosome X. Majority of the individuals with PNH-associated FLNA mutations are female whereas liveborn males with FLNA mutations are very rare. Fetal viability of the males seems to depend on the severity of the variant. Splicing or severe truncations presumed loss of function of the protein product, lead to male lethality and only partial-loss-of-function variants are reported in surviving males. Those variants mostly manifest milder clinical phenotypes in females and thus avoid detection of the disease in females. Methods We describe a novel p.Arg484Gln variant in the FLNA gene by performing whole exome analysis on the index case, his one affected brother and his healthy non-consanguineous parents. The transmission of PNH from a clinically asymptomatic mother to two sons is reported in a fully penetrant classical X-linked dominant mode. The variant was verified via Sanger sequencing. Additionally, we investigated the impact of missense mutations reported in affected males on the FLNa protein structure, dynamics and interactions by performing molecular dynamics (MD) simulations to examine the disease etiology and possible compensative mechanisms allowing survival of the males. Results We observed that p.Arg484Gln disrupts the FLNa by altering its structural and dynamical properties including the flexibility of certain regions, interactions within the protein, and conformational landscape of FLNa. However, these impacts existed for only a part the MD trajectories and highly similar patterns observed in the other 12 mutations reported in the liveborn males validated this mechanism. Conclusion It is concluded that the variants seen in the liveborn males result in transient pathogenic effects, rather than persistent impairments. By this way, the protein could retain its function occasionally and results in the survival of the males besides causing the disease.
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Affiliation(s)
- Umut Gerlevik
- Department of Biostatistics and Bioinformatics, Institute of Health Sciences, Acibadem Mehmet Ali Aydınlar University, Istanbul, Turkey
| | - Ceren Saygı
- Department of Molecular Biology and Genetics, Boğaziçi University, Istanbul, Turkey
| | - Hakan Cangül
- Center for Genetic Diagnosis, Istanbul Medipol University, Istanbul, Turkey
| | - Aslı Kutlu
- Department of Biostatistics and Bioinformatics, Institute of Health Sciences, Acibadem Mehmet Ali Aydınlar University, Istanbul, Turkey
- Bioinformatics & Genetics, Faculty of Engineering and Natural Science, İstinye University, İstanbul, Turkey
| | | | - Yasemin Topçu
- Department of Pediatric Neurology, Faculty of Medicine, Istanbul Medipol University, Istanbul, Turkey
| | - Nesrin Özören
- Department of Molecular Biology and Genetics, Boğaziçi University, Istanbul, Turkey
| | - Osman Uğur Sezerman
- Department of Biostatistics and Bioinformatics, Institute of Health Sciences, Acibadem Mehmet Ali Aydınlar University, Istanbul, Turkey
- Department of Biostatistics and Medical Informatics, School of Medicine, Acıbadem Mehmet Ali Aydınlar University, Istanbul, Turkey
- * E-mail:
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3
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Loft Nagel J, Jønch AE, Nguyen NTTN, Bygum A. Phenotypic manifestations in FLNA-related periventricular nodular heterotopia: a case report and review of the literature. BMJ Case Rep 2022; 15:e247268. [PMID: 35414575 PMCID: PMC9006829 DOI: 10.1136/bcr-2021-247268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/29/2022] [Indexed: 11/03/2022] Open
Abstract
Periventricular nodular heterotopia (PVNH) is an X-linked disease caused by loss-of-function variants in the filamin A (FLNA) gene. FLNA-PVNH is a heterogeneous disorder, and the phenotype is associated with neurological and non-neurological features including cardiovascular, gastrointestinal, pulmonary, haematological, cutaneous and skeletal manifestations. No clear definition of the FLNA-PVNH phenotype has been established, but the patients are predominantly females with seizures, cardiovascular manifestations, and normal intelligence or mild intellectual disability. Herein, we describe a PVNH patient diagnosed with a novel heterozygous missense variant in FLNA after an atypical presentation of deep vein thrombosis and thrombocytopenia. Clinical evaluation found hypermobility, cardiovascular and skin manifestations. Moreover, we conducted a literature review of 186 FLNA-PVNH patients to describe the phenotypic spectrum. In conclusion, our patient highlights the importance of thorough clinical evaluation to identify manifestations in this very heterogeneous disorder. The phenotypic review may guide clinicians in the assessment and follow-up of FLNA-PVNH patients.
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Affiliation(s)
- Julie Loft Nagel
- Faculty of Health Sciences, University of Southern Denmark, Odense, Denmark
| | - Aia Elise Jønch
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
| | - Nina T T N Nguyen
- Department of Neuroradiology, Odense University Hospital, Odense, Denmark
| | - Anette Bygum
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark
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4
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Billon C, Adham S, Hernandez Poblete N, Legrand A, Frank M, Chiche L, Zuily S, Benistan K, Savale L, Zaafrane-Khachnaoui K, Brehin AC, Bal L, Busa T, Fradin M, Quelin C, Chesneau B, Wahl D, Fergelot P, Goizet C, Mirault T, Jeunemaitre X, Albuisson J. Cardiovascular and connective tissue disorder features in FLNA-related PVNH patients: progress towards a refined delineation of this syndrome. Orphanet J Rare Dis 2021; 16:504. [PMID: 34863227 PMCID: PMC8642866 DOI: 10.1186/s13023-021-02128-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Accepted: 11/14/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND FLNA Loss-of-Function (LoF) causes periventricular nodular heterotopia type 1 (PVNH1), an acknowledged cause of seizures of various types. Neurological symptoms are inconstant, and cardiovascular (CV) defects or connective tissue disorders (CTD) have regularly been associated. We aimed at refining the description of CV and CTD features in patients with FLNA LoF and depicting the multisystemic nature of this condition. METHODS We retrospectively evaluated FLNA variants and clinical presentations in FLNA LoF patient with at least one CV or CTD feature, from three cohorts: ten patients from the French Reference Center for Rare Vascular Diseases, 23 patients from the national reference diagnostic lab for filaminopathies-A, and 59 patients from literature review. RESULTS Half of patients did not present neurological symptoms. Most patients presented a syndromic association combining CV and CTD features. CV anomalies, mostly aortic aneurysm and/or dilation were present in 75% of patients. CTD features were present in 75%. Variants analysis demonstrated an enrichment of coding variants in the CH1 domain of FLNA protein. CONCLUSION In FLNA LoF patients, the absence of seizures should not be overlooked. When considering a diagnosis of PVNH1, the assessment for CV and CTD anomalies is of major interest as they represent interlinked features. We recommend systematic study of FLNA within CTD genes panels, regardless of the presence of neurological symptoms.
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Affiliation(s)
- Clarisse Billon
- Département de génétique, Centre national de référence pour les maladies vasculaires rares, centre de référence européen VASCERN MSA, Hôpital Européen Georges Pompidou, AP-HP, 20 rue Leblanc, 75015, Paris, France. .,INSERM, U970 PARCC, Université de Paris, Paris, France.
| | - Salma Adham
- Département de génétique, Centre national de référence pour les maladies vasculaires rares, centre de référence européen VASCERN MSA, Hôpital Européen Georges Pompidou, AP-HP, 20 rue Leblanc, 75015, Paris, France.,Service de Médecine Vasculaire, Hôpital Saint Eloi, CHU Montpellier, Montpellier, France
| | - Natalia Hernandez Poblete
- Département de génétique médicale, Centre national de référence pour les maladies rares Neurogénétiques, Hôpital Pellegrin, CHU Bordeaux, Bordeaux, France.,Laboratoire de maladies rares : Génétique et Metabolisme (MRGM), INSERM U1211, Université de Bordeaux, Bordeaux, France
| | - Anne Legrand
- Département de génétique, Centre national de référence pour les maladies vasculaires rares, centre de référence européen VASCERN MSA, Hôpital Européen Georges Pompidou, AP-HP, 20 rue Leblanc, 75015, Paris, France.,INSERM, U970 PARCC, Université de Paris, Paris, France
| | - Michael Frank
- Département de génétique, Centre national de référence pour les maladies vasculaires rares, centre de référence européen VASCERN MSA, Hôpital Européen Georges Pompidou, AP-HP, 20 rue Leblanc, 75015, Paris, France.,INSERM, U970 PARCC, Université de Paris, Paris, France
| | - Laurent Chiche
- Faculté de médecine, Université de la Sorbonne, Paris, France.,Service de chirurgie vasculaire et endovasculaire, Centre aortique tertiaire, Hôpital universitaire Pitié-Salpêtrière, AP-HP, Paris, France
| | - Stephane Zuily
- Inserm UMRS 1116 DCAC, Université de Lorraine, Nancy, France.,Division de médecine vasculaire et centre de compétence régional pour les maladies vasculaires rares et autoimmunes systémiques, Centre Hospitalier Régional Universitaire de Nancy, Nancy, France
| | - Karelle Benistan
- Centre de Référence des Syndromes d'Ehlers-Danlos non Vasculaires, Hôpital Raymond Poincaré, Assistance Publique Hôpitaux de Paris, Garches, France.,UMR U1179 INSERM, Université Versailles Saint-Quentin, Montigny-le-Bretonneux, France
| | - Laurent Savale
- Université Paris-Saclay, Le Kremlin Bicêtre, France.,UMR_S 999, INSERM, Groupe hospitalier Marie-Lannelongue -Saint Joseph, Université Paris-Sud, Le Plessis-Robinson, France.,Service de Pneumologie, Hôpital Bicêtre, APHP, Le Kremlin-Bicêtre, France
| | | | - Anne-Claire Brehin
- INSERM U1245 , Normandy center for Genomic and Personalized Medicine, Normandie Univ, CHU Rouen, 76000, Rouen, France
| | - Laurence Bal
- Centre de référence régional Marfan et apparentés, Centre aortique, Hôpital La Timone, AP-HM, Marseille, France
| | - Tiffany Busa
- Département de Génétique Médicale, Hôpital La Timone, CHU de Marseille, Marseille, France
| | - Mélanie Fradin
- Service de Génétique Clinique, Centre de Référence Maladies Rares CLAD-Ouest, ERN ITHACA, CHU Rennes, Hôpital Sud, Rennes, France
| | - Chloé Quelin
- Service de Génétique Clinique, Centre de Référence Maladies Rares CLAD-Ouest, ERN ITHACA, CHU Rennes, Hôpital Sud, Rennes, France
| | - Bertrand Chesneau
- Service de génétique médicale, Hôpital Purpan, CHU de Toulouse, Toulouse, France.,Centre de Référence du Syndrome de Marfan et des syndromes apparentés, Hôpital des Enfants, CHU de Toulouse, Toulouse, France
| | - Denis Wahl
- Inserm UMRS 1116 DCAC, Université de Lorraine, Nancy, France.,Division de médecine vasculaire et centre de compétence régional pour les maladies vasculaires rares et autoimmunes systémiques, Centre Hospitalier Régional Universitaire de Nancy, Nancy, France
| | - Patricia Fergelot
- Département de génétique médicale, Centre national de référence pour les maladies rares Neurogénétiques, Hôpital Pellegrin, CHU Bordeaux, Bordeaux, France.,Laboratoire de maladies rares : Génétique et Metabolisme (MRGM), INSERM U1211, Université de Bordeaux, Bordeaux, France
| | - Cyril Goizet
- Département de génétique médicale, Centre national de référence pour les maladies rares Neurogénétiques, Hôpital Pellegrin, CHU Bordeaux, Bordeaux, France.,Faculté de médecine, Université de la Sorbonne, Paris, France
| | - Tristan Mirault
- Département de génétique, Centre national de référence pour les maladies vasculaires rares, centre de référence européen VASCERN MSA, Hôpital Européen Georges Pompidou, AP-HP, 20 rue Leblanc, 75015, Paris, France.,INSERM, U970 PARCC, Université de Paris, Paris, France
| | - Xavier Jeunemaitre
- Département de génétique, Centre national de référence pour les maladies vasculaires rares, centre de référence européen VASCERN MSA, Hôpital Européen Georges Pompidou, AP-HP, 20 rue Leblanc, 75015, Paris, France.,INSERM, U970 PARCC, Université de Paris, Paris, France
| | - Juliette Albuisson
- Département de génétique, Centre national de référence pour les maladies vasculaires rares, centre de référence européen VASCERN MSA, Hôpital Européen Georges Pompidou, AP-HP, 20 rue Leblanc, 75015, Paris, France.,INSERM, U970 PARCC, Université de Paris, Paris, France.,Plateforme de Transfert en Biologie Cancérologique, Centre Georges François Leclerc - UNICANCER- Institut GIMI, Dijon, France
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5
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Lu YT, Hsu CY, Liu YT, Chan CK, Chuang YC, Lin CH, Chang KP, Ho CJ, Ng CC, Lim KS, Tsai MH. The clinical and imaging features of FLNA positive and negative periventricular nodular heterotopia. Biomed J 2021; 45:542-548. [PMID: 35660364 PMCID: PMC9421925 DOI: 10.1016/j.bj.2021.05.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 04/10/2021] [Accepted: 05/13/2021] [Indexed: 11/30/2022] Open
Affiliation(s)
- Yan-Ting Lu
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Chung-Yao Hsu
- Department of Neurology, Kaohsiung Medical University Hospital, Kaohsiung, Taiwan
| | - Yo-Tsen Liu
- Division of Epilepsy, Department of Neurology Neurological Institute, Taipei Veterans General Hospital, Taipei, Taiwan; Department of Neurology, National Yang-Ming University School of Medicine, Taipei, Taiwan; Institute of Brain Science, National Yang-Ming University, Taipei, Taiwan; Brain Research Center, National Yang-Ming University, Taipei, Taiwan
| | - Chung-Kin Chan
- Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Yao-Chung Chuang
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Chih-Hsiang Lin
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Kai-Ping Chang
- Department of Pediatric, Wei-Gong Memorial Hospital, Miaoli, Taiwan; Department of Pediatric, National Yang-Ming University School of Medicine, Taipei, Taiwan
| | - Chen-Jui Ho
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
| | - Ching-Ching Ng
- Genetics and Molecular Biology, Institute of Biological Sciences, Faculty of Science, University of Malaya, Kuala Lumpur, Malaysia
| | - Kheng-Seang Lim
- Division of Neurology, Department of Medicine, Faculty of Medicine, University of Malaya, Kuala Lumpur, Malaysia
| | - Meng-Han Tsai
- Department of Neurology, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan; College of Medicine, Chang Gung University, Taoyuan, Taiwan.
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6
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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] [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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7
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Rezazadeh A, Bercovici E, Kiehl TR, Chow EW, Krings T, Bassett AS, Andrade DM. Periventricular nodular heterotopia in 22q11.2 deletion and frontal lobe migration. Ann Clin Transl Neurol 2018; 5:1314-1322. [PMID: 30480026 PMCID: PMC6243376 DOI: 10.1002/acn3.641] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 08/04/2018] [Accepted: 08/10/2018] [Indexed: 01/03/2023] Open
Abstract
Objective We aimed to delineate the distribution of periventricular nodular heterotopia (PNH) in patients with 22q11.2 microdeletion syndrome (22q11.2DS) and place this in the context of other genetic forms of PNH. Methods We retrospectively analyzed brain imaging and postmortem data available for adult patients with 22q11.2DS. We included only those with good quality MRI data (n = 29) in addition to two patients with PNH identified through postmortem studies. We also reviewed the pattern of PNH in all genetic conditions reported with this phenotype. Results Of the total seven patients (M = 4, F = 3; age: 19–61 years) identified to have PNH, six had a history of seizures, six had schizophrenia, six had variable levels of intellectual disability, and two had obsessive compulsive disorder. In all seven patients, the nodules were located over the dorsal pole of the frontal horn of the lateral ventricles. The nodules were small, noncontiguous, and ranged in number from 1 to 10 per individual. Our review identified 37 genetic conditions associated with PNH. With the cases reported here, 22q11.2DS becomes the fifth most commonly reported genetic condition, and the third most common copy number variation, associated with PNH. Interpretation The neuropsychiatric manifestations in our patients with PNH support other data indicating abnormal neurodevelopment as part of the pathogenesis of 22q11.2DS.The location and cellular characteristics of PNH in 22q11.2DS overlaps with a group of migrating postnatal interneurons termed Arc cells, although more research is needed to confirm that PNH in 22q11.2DS represents Arc cells arrested in their migratory pathway.
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Affiliation(s)
- Arezoo Rezazadeh
- Division of Neurology Department of Medicine Krembil Neuroscience Centre Toronto Western Hospital University of Toronto Toronto Ontario Canada
| | - Eduard Bercovici
- Division of Neurology Department of Medicine Krembil Neuroscience Centre Toronto Western Hospital University of Toronto Toronto Ontario Canada
| | - Tim-Rasmus Kiehl
- Department of Pathology University Health Network University of Toronto Toronto Ontario Canada
| | - Eva W Chow
- Clinical Genetics Research Program Centre for Addiction and Mental Health and Department of Psychiatry Toronto Ontario Canada
| | - Timo Krings
- Division of Neuroradiology Joint Department of Medical Imaging Toronto Western Hospital University Health Network University of Toronto Toronto Canada
| | - Anne S Bassett
- Clinical Genetics Research Program Centre for Addiction and Mental Health and Department of Psychiatry Toronto Ontario Canada.,Dalglish Family 22q Clinic Toronto General Research Institute and Department of Psychiatry Campbell Family Mental Health Research Institute University Health Network Centre for Addiction and Mental Health Toronto Ontario Canada
| | - Danielle M Andrade
- Division of Neurology Department of Medicine Krembil Neuroscience Centre Toronto Western Hospital University of Toronto Toronto Ontario Canada.,Krembil Neurosciences Epilepsy Genetics Program Toronto Western Hospital University of Toronto Toronto Ontario Canada
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8
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Cannaerts E, Shukla A, Hasanhodzic M, Alaerts M, Schepers D, Van Laer L, Girisha KM, Hojsak I, Loeys B, Verstraeten A. FLNA mutations in surviving males presenting with connective tissue findings: two new case reports and review of the literature. BMC MEDICAL GENETICS 2018; 19:140. [PMID: 30089473 PMCID: PMC6083619 DOI: 10.1186/s12881-018-0655-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/19/2018] [Accepted: 07/24/2018] [Indexed: 11/25/2022]
Abstract
Background Mutations in the X-linked gene filamin A (FLNA), encoding the actin-binding protein FLNA, cause a wide spectrum of connective tissue, skeletal, cardiovascular and/or gastrointestinal manifestations. Males are typically more severely affected than females with common pre- or perinatal death. Case presentation We provide a genotype- and phenotype-oriented literature overview of FLNA hemizygous mutations and report on two live-born male FLNA mutation carriers. Firstly, we identified a de novo, missense mutation (c.238C > G, p.(Leu80Val)) in a five-year old Indian boy who presented with periventricular nodular heterotopia, increased skin laxity, joint hypermobility, mitral valve prolapse with regurgitation and marked facial features (e.g. a flat face, orbital fullness, upslanting palpebral fissures and low-set ears). Secondly, we identified two cis-located FLNA mutations (c.7921C > G, p.(Pro2641Ala); c.7923delC, p.(Tyr2642Thrfs*63)) in a Bosnian patient with Ehlers-Danlos syndrome-like features such as skin translucency and joint hypermobility. This patient also presented with brain anomalies, pectus excavatum, mitral valve prolapse, pulmonary hypertension and dilatation of the pulmonary arteries. He died from heart failure in his second year of life. Conclusions These two new cases expand the list of live-born FLNA mutation-positive males with connective tissue disease from eight to ten, contributing to a better knowledge of the genetic and phenotypic spectrum of FLNA-related disease. Electronic supplementary material The online version of this article (10.1186/s12881-018-0655-0) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Elyssa Cannaerts
- Center of Medical Genetics, Faculty of Medicine and Health Sciences, University of Antwerp and Antwerp University Hospital, Prins Boudewijnlaan 43, 2650, Antwerp, Belgium
| | - Anju Shukla
- Department of Medical Genetics, Kasturba Medical College Manipal Academy of Higher Education, Manipal, India
| | - Mensuda Hasanhodzic
- Department of Endocrinology, Metabolic Diseases and Genetics, University Clinical Center Tuzla, Children's hospital, Tuzla, Bosnia and Herzegovina
| | - Maaike Alaerts
- Center of Medical Genetics, Faculty of Medicine and Health Sciences, University of Antwerp and Antwerp University Hospital, Prins Boudewijnlaan 43, 2650, Antwerp, Belgium
| | - Dorien Schepers
- Center of Medical Genetics, Faculty of Medicine and Health Sciences, University of Antwerp and Antwerp University Hospital, Prins Boudewijnlaan 43, 2650, Antwerp, Belgium
| | - Lut Van Laer
- Center of Medical Genetics, Faculty of Medicine and Health Sciences, University of Antwerp and Antwerp University Hospital, Prins Boudewijnlaan 43, 2650, Antwerp, Belgium
| | - Katta M Girisha
- Department of Medical Genetics, Kasturba Medical College Manipal Academy of Higher Education, Manipal, India
| | - Iva Hojsak
- Referral Center for Pediatric Gastroenterology and Nutrition, Children's Hospital Zagreb, University of Zagreb, School of Medicine, Zagreb, Croatia
| | - Bart Loeys
- Center of Medical Genetics, Faculty of Medicine and Health Sciences, University of Antwerp and Antwerp University Hospital, Prins Boudewijnlaan 43, 2650, Antwerp, Belgium.,Department of Human Genetics, Radboud University Nijmegen Medical Center, Nijmegen, The Netherlands
| | - Aline Verstraeten
- Center of Medical Genetics, Faculty of Medicine and Health Sciences, University of Antwerp and Antwerp University Hospital, Prins Boudewijnlaan 43, 2650, Antwerp, Belgium.
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9
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D'hondt S, Van Damme T, Malfait F. Vascular phenotypes in nonvascular subtypes of the Ehlers-Danlos syndrome: a systematic review. Genet Med 2017; 20:562-573. [PMID: 28981071 PMCID: PMC5993673 DOI: 10.1038/gim.2017.138] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2017] [Accepted: 07/18/2017] [Indexed: 12/31/2022] Open
Abstract
Purpose Within the spectrum of the Ehlers-Danlos syndromes (EDS), vascular complications are usually associated with the vascular subtype of EDS. Vascular complications are also observed in other EDS subtypes, but the reports are anecdotal and the information is dispersed. To better document the nature of vascular complications among “nonvascular” EDS subtypes, we performed a systematic review. Methods We queried three databases for English-language studies from inception until May 2017, documenting both phenotypes and genotypes of patients with nonvascular EDS subtypes. The outcome included the number and nature of vascular complications. Results A total of 112 papers were included and data were collected from 467 patients, of whom 77 presented with a vascular phenotype. Severe complications included mainly hematomas (53%), frequently reported in musculocontractural and classical-like EDS; intracranial hemorrhages (18%), with a high risk in dermatosparaxis EDS; and arterial dissections (16%), frequently reported in kyphoscoliotic and classical EDS. Other, more minor, vascular complications were reported in cardiac-valvular, arthrochalasia, spondylodysplastic, and periodontal EDS. Conclusion Potentially life-threatening vascular complications are a rare but important finding in several nonvascular EDS subtypes, highlighting a need for more systematic documentation. This review will help familiarize clinicians with the spectrum of vascular complications in EDS and guide follow-up and management.
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Affiliation(s)
- Sanne D'hondt
- Center for Medical Genetics, Ghent University and Ghent University Hospital, Ghent, Belgium
| | - Tim Van Damme
- Center for Medical Genetics, Ghent University and Ghent University Hospital, Ghent, Belgium
| | - Fransiska Malfait
- Center for Medical Genetics, Ghent University and Ghent University Hospital, Ghent, Belgium
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10
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Sahinoglu Z, Yapicier O, Ozcan N. Prenatal diagnosis of periventricular nodular heterotopia in borderline ventriculomegaly using sonography and magnetic resonance imaging. JOURNAL OF CLINICAL ULTRASOUND : JCU 2016; 44:510-513. [PMID: 26990213 DOI: 10.1002/jcu.22350] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/02/2015] [Accepted: 02/03/2016] [Indexed: 06/05/2023]
Abstract
Periventricular nodular heterotopia (PNH) is usually missed on prenatal sonographic examinations, even on targeted scans. Irregular ventricular walls on axial view and irregular square-shaped lateral ventricles on coronal view are suggestive of PNH in the early third trimester. To achieve an early prenatal diagnosis, it is important to keep in mind the possible coexistence of PNH with brain malformations such as ventriculomegaly, posterior fossa anomalies, or agenesis of corpus callosum. © 2016 Wiley Periodicals, Inc. J Clin Ultrasound 44:510-513, 2016.
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Affiliation(s)
- Zeki Sahinoglu
- Department of Perinatology, Clinic of Obstetrics and Gynecology, Anadolu Medical Center in affiliation with Johns Hopkins Medicine, Istanbul, Turkey.
| | - Ozlem Yapicier
- Department of Pathology, Acibadem University, Istanbul, Turkey
| | - Nahit Ozcan
- Department of Radiology, Sonomed Imaging Center, Istanbul, Turkey
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11
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Moutton S, Fergelot P, Naudion S, Cordier MP, Solé G, Guerineau E, Hubert C, Rooryck C, Vuillaume ML, Houcinat N, Deforges J, Bouron J, Devès S, Le Merrer M, David A, Geneviève D, Giuliano F, Journel H, Megarbane A, Faivre L, Chassaing N, Francannet C, Sarrazin E, Stattin EL, Vigneron J, Leclair D, Abadie C, Sarda P, Baumann C, Delrue MA, Arveiler B, Lacombe D, Goizet C, Coupry I. Otopalatodigital spectrum disorders: refinement of the phenotypic and mutational spectrum. J Hum Genet 2016; 61:693-9. [PMID: 27193221 DOI: 10.1038/jhg.2016.37] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 03/15/2016] [Accepted: 03/15/2016] [Indexed: 11/09/2022]
Abstract
Otopalatodigital spectrum disorders (OPDSD) constitute a group of dominant X-linked osteochondrodysplasias including four syndromes: otopalatodigital syndromes type 1 and type 2 (OPD1 and OPD2), frontometaphyseal dysplasia, and Melnick-Needles syndrome. These syndromes variably associate specific facial and extremities features, hearing loss, cleft palate, skeletal dysplasia and several malformations, and show important clinical overlap over the different entities. FLNA gain-of-function mutations were identified in these conditions. FLNA encodes filamin A, a scaffolding actin-binding protein. Here, we report phenotypic descriptions and molecular results of FLNA analysis in a large series of 27 probands hypothesized to be affected by OPDSD. We identified 11 different missense mutations in 15 unrelated probands (n=15/27, 56%), of which seven were novel, including one of unknown significance. Segregation analyses within families made possible investigating 20 additional relatives carrying a mutation. This series allows refining the phenotypic and mutational spectrum of FLNA mutations causing OPDSD, and providing suggestions to avoid the overdiagnosis of OPD1.
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Affiliation(s)
- Sébastien Moutton
- CHU Bordeaux, Hôpital Pellegrin, Department of Medical Genetics, Centre de Référence des Anomalies du Développement Embryonnaire, Bordeaux cedex, France.,Université de Bordeaux, INSERM U1211, Laboratoire Maladies Rares: Génétique et Métabolisme, Bordeaux, France
| | - Patricia Fergelot
- CHU Bordeaux, Hôpital Pellegrin, Department of Medical Genetics, Centre de Référence des Anomalies du Développement Embryonnaire, Bordeaux cedex, France.,Université de Bordeaux, INSERM U1211, Laboratoire Maladies Rares: Génétique et Métabolisme, Bordeaux, France.,Plateforme Génome Transcriptome, Centre de Génomique Fonctionnelle de Bordeaux, Université de Bordeaux, Bordeaux, France
| | - Sophie Naudion
- CHU Bordeaux, Hôpital Pellegrin, Department of Medical Genetics, Centre de Référence des Anomalies du Développement Embryonnaire, Bordeaux cedex, France
| | - Marie-Pierre Cordier
- CHU Lyon, Hôpital Femme-Mère-Enfant, Department of Medical Genetics, Bron cedex, France
| | - Guilhem Solé
- Université de Bordeaux, INSERM U1211, Laboratoire Maladies Rares: Génétique et Métabolisme, Bordeaux, France.,CHU Bordeaux, Hôpital Pellegrin, Department of Neurology, Fédération des Neurosciences Cliniques, Bordeaux, France
| | - Elodie Guerineau
- Université de Bordeaux, INSERM U1211, Laboratoire Maladies Rares: Génétique et Métabolisme, Bordeaux, France
| | - Christophe Hubert
- Plateforme Génome Transcriptome, Centre de Génomique Fonctionnelle de Bordeaux, Université de Bordeaux, Bordeaux, France
| | - Caroline Rooryck
- CHU Bordeaux, Hôpital Pellegrin, Department of Medical Genetics, Centre de Référence des Anomalies du Développement Embryonnaire, Bordeaux cedex, France.,Université de Bordeaux, INSERM U1211, Laboratoire Maladies Rares: Génétique et Métabolisme, Bordeaux, France
| | - Marie-Laure Vuillaume
- CHU Bordeaux, Hôpital Pellegrin, Department of Medical Genetics, Centre de Référence des Anomalies du Développement Embryonnaire, Bordeaux cedex, France.,Université de Bordeaux, INSERM U1211, Laboratoire Maladies Rares: Génétique et Métabolisme, Bordeaux, France
| | - Nada Houcinat
- CHU Bordeaux, Hôpital Pellegrin, Department of Medical Genetics, Centre de Référence des Anomalies du Développement Embryonnaire, Bordeaux cedex, France.,Université de Bordeaux, INSERM U1211, Laboratoire Maladies Rares: Génétique et Métabolisme, Bordeaux, France
| | - Julie Deforges
- CHU Bordeaux, Hôpital Pellegrin, Department of Medical Genetics, Centre de Référence des Anomalies du Développement Embryonnaire, Bordeaux cedex, France
| | - Julie Bouron
- CHU Bordeaux, Hôpital Pellegrin, Department of Medical Genetics, Centre de Référence des Anomalies du Développement Embryonnaire, Bordeaux cedex, France
| | - Sylvie Devès
- CHU Bordeaux, Hôpital Pellegrin, Department of Medical Genetics, Centre de Référence des Anomalies du Développement Embryonnaire, Bordeaux cedex, France
| | - Martine Le Merrer
- Institut Imagine, Hôpital Necker Enfants Malades, Department of Medical Genetics, INSERM U781, Université Paris Descartes-Sorbonne Paris Cité, Paris cedex, France
| | - Albert David
- CHU Nantes, Hôpital Mère-Enfant, Department of Medical Genetics, Nantes cedex, France
| | - David Geneviève
- CHRU Montpellier, Hôpital Arnaud de Villeneuve, Department of Medical Genetics, Université Montpellier INSERM U1183, CLAD Sud Languedoc-Roussillon, Montpellier cedex, France
| | - Fabienne Giuliano
- CHU Nice, Hôpital l'Archet 2, Department of Medical Genetics, Nice cedex, France
| | - Hubert Journel
- Centre Hospitalier Bretagne Atlantique, Department of Medical Genetics and Oncogenetics, Vannes cedex, France
| | - André Megarbane
- Al-Jawhara Center, Department of Medical Genetics, Arabian Gulf University, Manama, Kingdom of Bahrain
| | - Laurence Faivre
- CHU Dijon, Department of Medical Genetics, Centre de Référence Anomalies de Développement et Syndromes Malformatifs de l'inter-région Grand-Est, Hôpital d'Enfants, Dijon, France
| | - Nicolas Chassaing
- CHU Toulouse, Hôpital Purpan, Department of Medical Genetics, UDEAR, Université de Toulouse, Inserm, UPS, CNRS, Toulouse cedex, France
| | - Christine Francannet
- CHU Clermont-Ferrand, Hôpital d'Estaing, Department of Medical Genetics, Clermont-Ferrand cedex, France
| | - Elisabeth Sarrazin
- CHU de Fort de France, Hôpital Pierre Zobda-Quitman, Department of Neuropediatrics, Centre de Référence Caribéen des Maladies Rares Neurologiques et Neuromusculaires, Martinique, France
| | - Eva-Lena Stattin
- Department of Immunology, Genetics and Pathology, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Jacqueline Vigneron
- CHU Nancy, Maternité Régionale Adolphe Pinard, Department of Medical Genetics, Nancy cedex, France
| | - Danielle Leclair
- CHU Raymond Poincaré, Department of Physical Medicine and Rehabilitation, Centre de Référence Maladies Neuromusculaires, Garches, France
| | - Caroline Abadie
- CHRU Montpellier, Hôpital Arnaud de Villeneuve, Department of Medical Genetics, Université Montpellier INSERM U1183, CLAD Sud Languedoc-Roussillon, Montpellier cedex, France
| | - Pierre Sarda
- CHRU Montpellier, Hôpital Arnaud de Villeneuve, Department of Medical Genetics, Université Montpellier INSERM U1183, CLAD Sud Languedoc-Roussillon, Montpellier cedex, France
| | - Clarisse Baumann
- AP-HP, Hôpital Robert Debré, Department of Medical Genetics, CLAD Ile de France, Paris, France
| | - Marie-Ange Delrue
- CHU Bordeaux, Hôpital Pellegrin, Department of Medical Genetics, Centre de Référence des Anomalies du Développement Embryonnaire, Bordeaux cedex, France
| | - Benoit Arveiler
- CHU Bordeaux, Hôpital Pellegrin, Department of Medical Genetics, Centre de Référence des Anomalies du Développement Embryonnaire, Bordeaux cedex, France.,Université de Bordeaux, INSERM U1211, Laboratoire Maladies Rares: Génétique et Métabolisme, Bordeaux, France
| | - Didier Lacombe
- CHU Bordeaux, Hôpital Pellegrin, Department of Medical Genetics, Centre de Référence des Anomalies du Développement Embryonnaire, Bordeaux cedex, France.,Université de Bordeaux, INSERM U1211, Laboratoire Maladies Rares: Génétique et Métabolisme, Bordeaux, France
| | - Cyril Goizet
- CHU Bordeaux, Hôpital Pellegrin, Department of Medical Genetics, Centre de Référence des Anomalies du Développement Embryonnaire, Bordeaux cedex, France.,Université de Bordeaux, INSERM U1211, Laboratoire Maladies Rares: Génétique et Métabolisme, Bordeaux, France
| | - Isabelle Coupry
- Université de Bordeaux, INSERM U1211, Laboratoire Maladies Rares: Génétique et Métabolisme, Bordeaux, France
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12
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Naudion S, Moutton S, Coupry I, Sole G, Deforges J, Guerineau E, Hubert C, Deves S, Pilliod J, Rooryck C, Abel C, Le Breton F, Collardeau-Frachon S, Cordier M, Delezoide A, Goldenberg A, Loget P, Melki J, Odent S, Patrier S, Verloes A, Viot G, Blesson S, Bessières B, Lacombe D, Arveiler B, Goizet C, Fergelot P. Fetal phenotypes in otopalatodigital spectrum disorders. Clin Genet 2015; 89:371-7. [DOI: 10.1111/cge.12679] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 09/12/2015] [Accepted: 09/21/2015] [Indexed: 11/27/2022]
Affiliation(s)
- S. Naudion
- CHU Bordeaux, Centre de Référence des Anomalies du Développement Embryonnaire; Service de Génétique Médicale; Bordeaux France
| | - S. Moutton
- CHU Bordeaux, Centre de Référence des Anomalies du Développement Embryonnaire; Service de Génétique Médicale; Bordeaux France
- University Bordeaux, Laboratoire Maladies Rares; Génétique et Métabolisme (MRGM); Bordeaux France
| | - I. Coupry
- University Bordeaux, Laboratoire Maladies Rares; Génétique et Métabolisme (MRGM); Bordeaux France
| | - G. Sole
- University Bordeaux, Laboratoire Maladies Rares; Génétique et Métabolisme (MRGM); Bordeaux France
- CHU Bordeaux; Fédération des Neurosciences Cliniques; Bordeaux France
| | - J. Deforges
- CHU Bordeaux, Centre de Référence des Anomalies du Développement Embryonnaire; Service de Génétique Médicale; Bordeaux France
| | - E. Guerineau
- University Bordeaux, Laboratoire Maladies Rares; Génétique et Métabolisme (MRGM); Bordeaux France
| | - C. Hubert
- Plateforme Génome Transcriptome; Centre de Génomique Fonctionnelle de Bordeaux, Université de Bordeaux; Bordeaux France
| | - S. Deves
- CHU Bordeaux, Centre de Référence des Anomalies du Développement Embryonnaire; Service de Génétique Médicale; Bordeaux France
| | - J. Pilliod
- University Bordeaux, Laboratoire Maladies Rares; Génétique et Métabolisme (MRGM); Bordeaux France
| | - C. Rooryck
- CHU Bordeaux, Centre de Référence des Anomalies du Développement Embryonnaire; Service de Génétique Médicale; Bordeaux France
- University Bordeaux, Laboratoire Maladies Rares; Génétique et Métabolisme (MRGM); Bordeaux France
| | - C. Abel
- CHU Lyon, Service de Génétique; Hôpital Femme Mère Enfant, Hospices Civils de Lyon; Lyon France
| | - F. Le Breton
- CHU Lyon, Service de Pathologie du Nord; Hôpital de la Croix-Rousse; Lyon France
| | | | - M.P. Cordier
- CHU Lyon, Service de Génétique Médicale; Hôpital Mère Enfant; Lyon France
| | - A.L. Delezoide
- APHP, Service de Biologie du Développement; Hôpital Robert Debré; Paris France
| | - A. Goldenberg
- CHU Rouen; Service de Génétique Médicale; Rouen France
| | - P. Loget
- CHU Rennes; Service d'Anatomie Cytologie Pathologique; Rennes France
| | - J. Melki
- INSERM U78, Laboratoire de Neurogénétique Moléculaire; Université de Paris XI; Paris France
| | - S. Odent
- CHU de Rennes, Service de Génétique Clinique; Centre de Référence Anomalies du Développement CLAD-Ouest, Hôpital Sud; Rennes France
| | - S. Patrier
- CHU Rouen; Service d'Anatomie Pathologique; Rouen France
| | - A. Verloes
- Département de Génétique, APHP-Hôpital universitaire Robert Debré; Université Sorbonne Paris-Cité, Faculté de Médecine Denis Diderot-Paris 7, and INSERM UMR 1141; Paris France
| | - G. Viot
- APHP, Service de Génétique Médicale; Maternité Port-Royal; Paris France
| | - S. Blesson
- CHRU Tours, Service de Génétique; Hôpital Bretonneau; Tours France
| | - B. Bessières
- APHP, Service Histo-Embryologie et Cytogénétique; Hôpital Necker; Paris France
| | - D. Lacombe
- CHU Bordeaux, Centre de Référence des Anomalies du Développement Embryonnaire; Service de Génétique Médicale; Bordeaux France
- University Bordeaux, Laboratoire Maladies Rares; Génétique et Métabolisme (MRGM); Bordeaux France
| | - B. Arveiler
- CHU Bordeaux, Centre de Référence des Anomalies du Développement Embryonnaire; Service de Génétique Médicale; Bordeaux France
- University Bordeaux, Laboratoire Maladies Rares; Génétique et Métabolisme (MRGM); Bordeaux France
| | - C. Goizet
- CHU Bordeaux, Centre de Référence des Anomalies du Développement Embryonnaire; Service de Génétique Médicale; Bordeaux France
- University Bordeaux, Laboratoire Maladies Rares; Génétique et Métabolisme (MRGM); Bordeaux France
| | - P. Fergelot
- CHU Bordeaux, Centre de Référence des Anomalies du Développement Embryonnaire; Service de Génétique Médicale; Bordeaux France
- University Bordeaux, Laboratoire Maladies Rares; Génétique et Métabolisme (MRGM); Bordeaux France
- Plateforme Génome Transcriptome; Centre de Génomique Fonctionnelle de Bordeaux, Université de Bordeaux; Bordeaux France
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13
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van Kogelenberg M, Clark AR, Jenkins Z, Morgan T, Anandan A, Sawyer GM, Edwards M, Dudding T, Homfray T, Castle B, Tolmie J, Stewart F, Kivuva E, Pilz DT, Gabbett M, Sutherland-Smith AJ, Robertson SP. Diverse phenotypic consequences of mutations affecting the C-terminus of FLNA. J Mol Med (Berl) 2015; 93:773-82. [PMID: 25686753 DOI: 10.1007/s00109-015-1261-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 01/20/2015] [Accepted: 01/30/2015] [Indexed: 01/21/2023]
Abstract
UNLABELLED Filamin A, the filamentous protein encoded by the X-linked gene FLNA, cross-links cytoskeletal actin into three-dimensional networks, facilitating its role as a signalling scaffold and a mechanosensor of extrinsic shear forces. Central to these functions is the ability of FLNA to form V-shaped homodimers through its C-terminal located filamin repeat 24. Additionally, many proteins that interact with FLNA have a binding site that includes the C-terminus of the protein. Here, a cohort of patients with mutations affecting this region of the protein is studied, with particular emphasis on the phenotype of male hemizygotes. Seven unrelated families are reported, with five exhibiting a typical female presentation of periventricular heterotopia (PH), a neuronal migration disorder typically caused by loss-of-function mutations in FLNA. One male presents with widespread PH consistent with previous male phenotypes attributable to hypomorphic mutations in FLNA. In stark contrast, two brothers are described with a mild PH presentation, due to a missense mutation (p.Gly2593Glu) inserting a large negatively charged amino acid into the hydrophobic dimerisation interface of FLNA. Co-immunoprecipitation, in vitro cross-linking studies and gel filtration chromatography all demonstrated that homodimerisation of isolated FLNA repeat 24 is abolished by this p.Gly2593Glu substitution but that extended FLNA(Gly2593Glu) repeat 16-24 constructs exhibit dimerisation. These observations imply that other interactions apart from those mediated by the canonical repeat 24 dimerisation interface contribute to FLNA homodimerisation and that mutations affecting this region of the protein can have broad phenotypic effects. KEY MESSAGES • Mutations in the X-linked gene FLNA cause a spectrum of syndromes. • Genotype-phenotype correlations are emerging but still remain unclear. • C-term mutations can confer male lethality, survival or connective tissue defects. • Mutations leading to the latter affect filamin dimerisation. • This deficit is compensated for by remotely acting domains elsewhere in FLNA.
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Affiliation(s)
- Margriet van Kogelenberg
- Department of Paediatrics and Child Health, Dunedin School of Medicine, Otago University, Dunedin, New Zealand
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14
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Teixeira SR, Blondiaux E, Cassart M, Couture A, Moutard ML, Whalen S, Gelot A, Ducou le Pointe H, Garel C. Association of periventricular nodular heterotopia with posterior fossa cyst: a prenatal case series. Prenat Diagn 2015; 35:337-41. [DOI: 10.1002/pd.4543] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2014] [Revised: 10/20/2014] [Accepted: 12/01/2014] [Indexed: 12/22/2022]
Affiliation(s)
- Sara R. Teixeira
- Service de Radiologie; Hôpital d'Enfants Armand-Trousseau-Hôpitaux Universitaires de l'Est Parisien (APHP), Université Pierre et Marie Curie; Paris VI France
| | - Eléonore Blondiaux
- Service de Radiologie; Hôpital d'Enfants Armand-Trousseau-Hôpitaux Universitaires de l'Est Parisien (APHP), Université Pierre et Marie Curie; Paris VI France
| | - Marie Cassart
- Service d'Imagerie Médicale; Hôpital d'Ixelles-Etterbeek; Bruxelles Belgium
| | - Alain Couture
- Service de Radiopédiatrie; Hôpital Arnaud de Villeneuve; Montpellier France
| | - Marie-Laure Moutard
- Service de Neurologie Pédiatrique; Hôpital d'Enfants Armand-Trousseau; Paris France
| | - Sandra Whalen
- Service de Génétique Médicale, Hôpital de la Pitié-Salpétrière; Université Pierre et Marie Curie; Paris VI France
| | - Antoinette Gelot
- Unité de Neuropathologie, Service d'anatomo-pathologie, Hôpital d'Enfants Armand-Trousseau; APHP, Université Pierre et Marie Curie; Paris VI France
| | - Hubert Ducou le Pointe
- Service de Radiologie; Hôpital d'Enfants Armand-Trousseau-Hôpitaux Universitaires de l'Est Parisien (APHP), Université Pierre et Marie Curie; Paris VI France
| | - Catherine Garel
- Service de Radiologie; Hôpital d'Enfants Armand-Trousseau-Hôpitaux Universitaires de l'Est Parisien (APHP), Université Pierre et Marie Curie; Paris VI France
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Germline mosaicism in X-linked periventricular nodular heterotopia. BMC Neurol 2014; 14:125. [PMID: 24906659 PMCID: PMC4057563 DOI: 10.1186/1471-2377-14-125] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Accepted: 05/28/2014] [Indexed: 11/28/2022] Open
Abstract
Background X-linked periventricular nodular heterotopia is a disorder of neuronal migration resulting from mutations in the filamin A gene. This is an X-linked dominant condition where most affected patients are female and present with seizures. Extra–cerebral features such as cardiac abnormalities and thrombocytopenia have also been documented. Loss of function mutations in filamin A are predicted to result in prenatal lethality in males. Somatic mosaicism and mutations that lead to partial loss of function of the protein are hypothesized to explain viability of males reported in the literature. We report the first case of germline mosaicism involving a loss of function mutation in filamin A in a family where brain MRI, clinical exam, and mutation analysis is normal in both biological parents. Case presentation The index patient, a 39 year old female with normal development, had her first seizure at 24 years with no evidence of any precipitating factors. Brain MRI shows bilateral periventricular nodular heterotopia. She has thrombocytopenia and an echocardiogram at age 32 years revealed a mildly dilated aortic root and ascending aorta with mild aortic regurgitation. The second patient, the 36 year old younger sister of the index case, is currently healthy with no evidence of seizures or cardiac abnormalities. Her brain MRI is consistent with bilateral periventricular nodular heterotopia. The mother is healthy at 57 years of age with a normal brain MRI. The father is healthy at 59 years of age with a normal brain MRI. DNA sequencing of lymphocyte extracted DNA from the two sisters shows a c.2002C > T transition in exon 13 of filamin A resulting in a p.Gln668Ter mutation. This nonsense mutation was not detected in peripheral blood lymphocytes from the unaffected parents. Conclusion This report provides evidence for germline mosaicism in filamin A-associated periventricular nodular heterotopia. This case must now be considered when providing genetic counseling to families where a proband presents as an isolated case and parental investigations are unremarkable.
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Blondiaux E, Sileo C, Nahama-Allouche C, Moutard ML, Gelot A, Jouannic JM, Ducou le Pointe H, Garel C. Periventricular nodular heterotopia on prenatal ultrasound and magnetic resonance imaging. ULTRASOUND IN OBSTETRICS & GYNECOLOGY : THE OFFICIAL JOURNAL OF THE INTERNATIONAL SOCIETY OF ULTRASOUND IN OBSTETRICS AND GYNECOLOGY 2013; 42:149-155. [PMID: 23151899 DOI: 10.1002/uog.12340] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 10/29/2012] [Indexed: 06/01/2023]
Abstract
OBJECTIVES To describe the prenatal ultrasound and magnetic resonance imaging (MRI) findings suggestive of periventricular nodular heterotopia (PNH). METHODS This retrospective case series included fetuses referred to our institution for brain MRI between 2007 and 2012, which were diagnosed with PNH and confirmed by postnatal MRI or autopsy. The type of PNH, associated ventriculomegaly and associated malformations are reported. RESULTS We included 11 fetuses (nine female, two male) with a mean gestational age at diagnosis of 31 (range, 23-34) weeks. PNH lesions were small and diffuse (n = 7), large and multiple (n = 1) or single (n = 3). A targeted ultrasound examination performed before fetal MRI missed the diagnosis in four cases (one diffuse and three single); a further ultrasound examination performed after MRI diagnosed PNH in two of these four cases. Ventriculomegaly was present in six cases (four unilateral and two bilateral). PNH appeared in all cases as nodules of intermediate echogenicity protruding into the ventricular lumen. In all cases of diffuse PNH, the frontal horns and bodies of the lateral ventricles appeared square in shape on coronal view, with irregular borders on axial view. Associated cerebral malformations were observed in seven cases and included corpus callosal agenesis (n = 4, with additional malformations in two) and retrocerebellar cyst (n = 3). Extracerebral malformations were also present in two cases. Maternal MRI was performed in five of the six cases of isolated small and diffuse PNH in female fetuses, and demonstrated PNH in two of these. CONCLUSION PNH is underdiagnosed at prenatal ultrasound, even on targeted scans. Irregular ventricular borders on axial view and irregular square-shaped lateral ventricles on coronal view are suggestive of PNH at prenatal ultrasound.
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Affiliation(s)
- E Blondiaux
- Service de Radiologie, Hôpital Trousseau, Hôpitaux Universitaires de l'Est Parisien (APHP), Université Pierre et Marie Curie, Paris VI, France.
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Oegema R, Hulst JM, Theuns-Valks SD, van Unen LM, Schot R, Mancini GM, Schipper ME, de Wit MC, Sibbles BJ, de Coo IF, Nanninga V, Hofstra RM, Halley DJ, Brooks AS. Novel no-stop FLNA
mutation causes multi-organ involvement in males. Am J Med Genet A 2013; 161A:2376-84. [DOI: 10.1002/ajmg.a.36109] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2013] [Accepted: 05/27/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Renske Oegema
- Department of Clinical Genetics; Erasmus MC; Rotterdam the Netherlands
| | - Jessie M. Hulst
- Department of Pediatric Gastroenterology; Erasmus MC-Sophia; Rotterdam the Netherlands
| | | | | | - Rachel Schot
- Department of Clinical Genetics; Erasmus MC; Rotterdam the Netherlands
| | | | | | - Marie C.Y. de Wit
- Department of Pediatric Neurology; Erasmus MC-Sophia; Rotterdam the Netherlands
| | - Barbara J. Sibbles
- Department of Pediatric Gastroenterology; Erasmus MC-Sophia; Rotterdam the Netherlands
| | | | - Veerle Nanninga
- Department of Neurology; Albert Schweitzer Ziekenhuis; Dordrecht the Netherlands
| | | | - Dicky J.J. Halley
- Department of Clinical Genetics; Erasmus MC; Rotterdam the Netherlands
| | - Alice S. Brooks
- Department of Clinical Genetics; Erasmus MC; Rotterdam the Netherlands
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Kasper BS, Kurzbuch K, Chang BS, Pauli E, Hamer HM, Winkler J, Hehr U. Paternal inheritance of classic X-linked bilateral periventricular nodular heterotopia. Am J Med Genet A 2013; 161A:1323-8. [DOI: 10.1002/ajmg.a.35917] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2012] [Accepted: 02/04/2013] [Indexed: 11/09/2022]
Affiliation(s)
- Burkhard S. Kasper
- Department of Neurology; Epilepsy Center, Erlangen University; Erlangen; Germany
| | - Katrin Kurzbuch
- Department of Neurology; Epilepsy Center, Erlangen University; Erlangen; Germany
| | - Bernard S. Chang
- Department of Neurology; Comprehensive Epilepsy Center, Beth Israel Deaconess Medical Center and Harvard Medical School; Boston, Massachusetts
| | - Elisabeth Pauli
- Department of Neurology; Epilepsy Center, Erlangen University; Erlangen; Germany
| | - Hajo M. Hamer
- Department of Neurology; Epilepsy Center, Erlangen University; Erlangen; Germany
| | - Jürgen Winkler
- Department of Neurology; Molecular Neurology, Erlangen University; Erlangen; Germany
| | - Ute Hehr
- Department of Human Genetics; Center for Human Genetics, University of Regensburg; Regensburg; Germany
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Copy number variants in adult patients with Lennox-Gastaut syndrome features. Epilepsy Res 2013; 105:110-7. [PMID: 23415449 DOI: 10.1016/j.eplepsyres.2013.01.009] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2012] [Revised: 12/29/2012] [Accepted: 01/18/2013] [Indexed: 12/14/2022]
Abstract
PURPOSE Lennox-Gastaut syndrome (LGS) is a severe epileptic encephalopathy with complex etiology. To explore possible genetic predispositions and causes of LGS, we have searched for copy number variants (CNVs). METHODS We studied 21 patients with LGS or LGS-like epilepsy for CNVs using whole-genome array comparative genomic hybridization (aCGH). KEY FINDINGS Eight patients (38%) carried rare CNVs that might contribute to their phenotype. The pathogenicity could be questioned in some of them, but in four patients (19%) a causative role was considered highly probable. Three had CNVs and clinical features consistent with known genetic syndromes: 22q13.3 deletion, 2q23.1 deletion, and MECP2 duplication. SIGNIFICANCE There is a high frequency of rare CNVs in adult patients with LGS-like epilepsy. The phenotypes of these background disorders may be obscured by the effects of intractable seizures and massive antiepileptic drug treatment. Previously, syndromic disorders were primarily identified by their clinical features; however, a genome wide approach with identification of the genotype might shed light on the phenotype.
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