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Carton de Tournai D, Vandernoot I, Marangoni M, Faverly D, Diaz M, Casagranda A, Berlingin E, Van Maldergem L. CYLD-related cutaneous syndrome: variable p.Pro482fs*6 phenotype in five individuals from two unrelated families. J Eur Acad Dermatol Venereol 2020; 35:e81-e83. [PMID: 32678957 DOI: 10.1111/jdv.16823] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- D Carton de Tournai
- Department of Dermatology, Ambroise Paré University Hospital, Mons, Belgium.,Department of Dermatology, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - I Vandernoot
- Department of Dermatology, Ambroise Paré University Hospital, Mons, Belgium.,Center of Human Genetics, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - M Marangoni
- Center of Human Genetics, Hôpital Erasme, Université Libre de Bruxelles, Brussels, Belgium
| | - D Faverly
- Center of Morphological Pathology, Brussels, Belgium
| | - M Diaz
- Department of Oncology, Ambroise Paré University Hospital, Mons, Belgium
| | - A Casagranda
- Department of Dermatology, Ambroise Paré University Hospital, Mons, Belgium
| | - E Berlingin
- Department of Dermatology, Ambroise Paré University Hospital, Mons, Belgium
| | - L Van Maldergem
- Clinical Investigation Center 1431, National Institute of Health and Medical Research (INSERM), Paris, France.,Center of Human Genetics, University of Franche-Comté, Besançon, France
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2
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Ader F, De Groote P, Reant P, Dupin Deguine D, Rambaud C, Khraiche D, Pruny J, Dramard M, Troadec Y, Gouya L, Jeunemaitre X, Van Maldergem L, Villard E, Charron P, Richard P. FLNC pathogenic variants in patients with cardiomyopathies: Prevalence and genotype-phenotype correlations. Archives of Cardiovascular Diseases Supplements 2020. [DOI: 10.1016/j.acvdsp.2019.09.065] [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: 11/16/2022]
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3
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Ader F, De Groote P, Reant P, Dupin-Deguine D, Rambaud C, Khraiche D, Pruny JF, Mathieu Dramard M, Troadec Y, Gouya L, Jeunemaitre X, Van Maldergem L, Villard E, Charron P, Richard P. P1247FLNC pathogenic variants in patients with various cardiomyopathies:prevalence and genotype-phenotype correlations. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background/Introduction
Pathogenic variants FLNC encoding filamin C have been firstly reported to cause myopathies, and were recently linked to isolated cardiac phenotypes.However, few data on phenotype-genotype correlation are available.
Purpose
Our aim was to estimate the prevalence of FLNC pathogenic variants in cardiomyopathies and to study the relations between phenotype and genotype.
Methods
DNAs from a cohort of 1150 unrelated index-patients with an isolated cardiomyopathy (700 hypertrophic, 300 dilated, 50 restrictive cardiomyopathies, and 100 left ventricle non-compactions) have been sequenced on a custom panel of 52 cardiomyopathy disease-causing genes.
Results
A FLNC pathogenic variant was identified in 28 patients corresponding to a prevalence ranging from 1 to 8% depending on the cardiomyopathy subtypes. Truncating variants were always identified in patients with dilated cardiomyopathy, while missense or in-frame variants were found in other phenotypes. This work reported for the first time a left ventricular non-compaction associated with FLNC pathogenic variant.
In the cohort, nine patients (32%) were implanted with an automatic defibrillator. In 7 families (25%), history of sudden cardiac death (SCD) before 50 years was reported. A personal or family history of sudden cardiac death (SCD) was significantly higher in patients with truncating variants than in patients carrying missense variants (p=0.01). Four patients died of cardiac cause including 3 from SCD and 1 from heart failure.
Conclusion
This work highlights the role of FLNC in cardiomyopathies. A correlation between the type of the variant and the cardiomyopathy subtype was observed as well as with SCD risk. These new data should be taken into consideration for patient's management and primary prevention of sudden cardiac death.
Acknowledgement/Funding
La ligue contre la Cardiomyopathie
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Affiliation(s)
- F Ader
- Hospital Pitie-Salpetriere, Paris, France
| | | | - P Reant
- Hospital Haut Leveque, Bordeaux-Pessac, France
| | | | - C Rambaud
- Hopital Raymond Poincare, Garches, France
| | | | - J F Pruny
- Hospital Pitie-Salpetriere, Paris, France
| | | | - Y Troadec
- University Hospital of Caen, Caen, France
| | - L Gouya
- Hospital Bichat-Claude Bernard, Paris, France
| | | | | | | | - P Charron
- Hospital Pitie-Salpetriere, Paris, France
| | - P Richard
- Hospital Pitie-Salpetriere, Paris, France
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4
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Ader F, De Groote P, Reant P, Rooryck-Thambo C, Dupin Deguine D, Rambaud C, Khraiche D, Perret C, Pruny J, Mathieu Dramard M, Gerard M, Troadec Y, Gouya L, Jeunemaitre X, Van Maldergem L, Hagège A, Villard E, Charron P, Richard P. FLNC mutations in patients with cardiomyopathies: Prevalence and genotype-phenotype correlations. Archives of Cardiovascular Diseases Supplements 2019. [DOI: 10.1016/j.acvdsp.2019.02.184] [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: 11/25/2022]
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5
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Brischoux-Boucher E, Trimouille A, Baujat G, Goldenberg A, Schaefer E, Guichard B, Hannequin P, Paternoster G, Baer S, Cabrol C, Weber E, Godfrin G, Lenoir M, Lacombe D, Collet C, Van Maldergem L. IL11RA-related Crouzon-like autosomal recessive craniosynostosis in 10 new patients: Resemblances and differences. Clin Genet 2018; 94:373-380. [DOI: 10.1111/cge.13409] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 06/14/2018] [Accepted: 06/15/2018] [Indexed: 02/02/2023]
Affiliation(s)
| | - A. Trimouille
- CHU Bordeaux, Service de Génétique Médicale, INSERM U1211; Université de Bordeaux; Bordeaux France
| | - G. Baujat
- Centre de Référence Maladies Osseuses Constitutionnelles, Institut Imagine; Université Paris Descartes-Sorbonne Paris Cité; Paris France
| | - A. Goldenberg
- Service de Génétique, Centre Normand de Génomique Médicale et Médecine Personnalisée; Centre Hospitalier et Universitaire, Université de Rouen; Rouen France
| | - E. Schaefer
- Service de Génétique Médicale; Centre Hospitalier et Universitaire, Hôpital de Hautepierre, Université de Strasbourg; Strasbourg France
| | - B. Guichard
- Service de Chirurgie Maxillo-Faciale; Centre Hospitalier et Universitaire, Université de Rouen; Rouen France
| | - P. Hannequin
- Service de Neurochirurgie; Centre Hospitalier et Universitaire, Université de Rouen; Rouen France
| | - G. Paternoster
- Service de Neurochirurgie Pédiatrique; Hôpital Necker-Enfants Malades; Paris France
| | - S. Baer
- Service de Génétique Médicale; Centre Hospitalier et Universitaire, Hôpital de Hautepierre, Université de Strasbourg; Strasbourg France
| | - C. Cabrol
- Centre de Génétique Humaine; Université de Franche-Comté; Besançon France
| | - E. Weber
- Service de Chirurgie Maxillo-Faciale; Centre Hospitalier et Universitaire, Université de Franche-Comté; Besançon France
| | - G. Godfrin
- Service de Neurochirurgie; Centre Hospitalier et Universitaire, Université de Franche-Comté; Besançon France
| | - M. Lenoir
- Service de Radiologie; Centre Hospitalier et Universitaire, Université de Franche-Comté; Besançon France
| | - D. Lacombe
- CHU Bordeaux, Service de Génétique Médicale, INSERM U1211; Université de Bordeaux; Bordeaux France
| | - C. Collet
- Service de Biochimie et Biologie Moléculaire; Groupement Hospitalier et Universitaire Lariboisière, Assistance Publique - Hôpitaux de Paris, Université Paris-Descartes; Paris France
| | - L. Van Maldergem
- Centre de Génétique Humaine; Université de Franche-Comté; Besançon France
- Integrative and Cognitive Neurosciences Research Unit EA481; University of Franche-Comté; Besançon France
- Clinical Investigation Center 1431; National Institute of Health and Medical Research (INSERM), University of Franche-Comté; Besançon France
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6
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Ramaekers VT, Segers K, Sequeira JM, Koenig M, Van Maldergem L, Bours V, Kornak U, Quadros EV. Genetic assessment and folate receptor autoantibodies in infantile-onset cerebral folate deficiency (CFD) syndrome. Mol Genet Metab 2018; 124:87-93. [PMID: 29661558 DOI: 10.1016/j.ymgme.2018.03.001] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 03/01/2018] [Accepted: 03/02/2018] [Indexed: 01/08/2023]
Abstract
INTRODUCTION Cerebral folate deficiency (CFD) syndromes are defined as neuro-psychiatric conditions with low CSF folate and attributed to different causes such as autoantibodies against the folate receptor-alpha (FR) protein that can block folate transport across the choroid plexus, FOLR1 gene mutations or mitochondrial disorders. High-dose folinic acid treatment restores many neurologic deficits. STUDY AIMS AND METHODS Among 36 patients from 33 families the infantile-onset CFD syndrome was diagnosed based on typical clinical features and low CSF folate. All parents were healthy. Three families had 2 affected siblings, while parents from 4 families were first cousins. We analysed serum FR autoantibodies and the FOLR1 and FOLR2 genes. Among three consanguineous families homozygosity mapping attempted to identify a monogenetic cause. Whole exome sequencing (WES) was performed in the fourth consanguineous family, where two siblings also suffered from polyneuropathy as an atypical finding. RESULTS Boys (72%) outnumbered girls (28%). Most patients (89%) had serum FR autoantibodies fluctuating over 5-6 weeks. Two children had a genetic FOLR1 variant without pathological significance. Homozygosity mapping failed to detect a single autosomal recessive gene. WES revealed an autosomal recessive polynucleotide kinase 3´phosphatase (PNKP) gene abnormality in the siblings with polyneuropathy. DISCUSSION Infantile-onset CFD was characterized by serum FR autoantibodies as its predominant pathology whereas pathogenic FOLR1 gene mutations were absent. Homozygosity mapping excluded autosomal recessive inheritance of any single responsible gene. WES in one consanguineous family identified a PNKP gene abnormality that explained the polyneuropathy and also its contribution to the infantile CFD syndrome because the PNKP gene plays a dual role in both neurodevelopment and immune-regulatory function. Further research for candidate genes predisposing to FRα-autoimmunity is suggested to include X-chromosomal and non-coding DNA regions.
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Affiliation(s)
- V Th Ramaekers
- Center of Autism and Department of Genetics, University Hospital Liège (CHU), Belgium.
| | - K Segers
- Center of Autism and Department of Genetics, University Hospital Liège (CHU), Belgium
| | - J M Sequeira
- Department of Medicine, SUNY-Downstate Medical Center, Brooklyn, New York, USA
| | - M Koenig
- EA7402 Institut Universitaire de Recherche Clinique, Montpellier, France
| | - L Van Maldergem
- Center Human Genetics, Université de Franche-Comté, Besançon, France
| | - V Bours
- Center of Autism and Department of Genetics, University Hospital Liège (CHU), Belgium
| | - U Kornak
- Institut für Humangenetik, Charité-University Berlin, Berlin, Germany
| | - E V Quadros
- Department of Medicine, SUNY-Downstate Medical Center, Brooklyn, New York, USA
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7
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Braunisch MC, Gallwitz H, Abicht A, Diebold I, Holinski-Feder E, Van Maldergem L, Lammens M, Kovács-Nagy R, Alhaddad B, Strom TM, Meitinger T, Senderek J, Rudnik-Schöneborn S, Haack TB. Extension of the phenotype of biallelic loss-of-function mutations in SLC25A46 to the severe form of pontocerebellar hypoplasia type I. Clin Genet 2017; 93:255-265. [PMID: 28653766 DOI: 10.1111/cge.13084] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2017] [Revised: 06/18/2017] [Accepted: 06/20/2017] [Indexed: 01/04/2023]
Abstract
Biallelic mutations in SLC25A46, encoding a modified solute transporter involved in mitochondrial dynamics, have been identified in a wide range of conditions such as hereditary motor and sensory neuropathy with optic atrophy type VIB (OMIM: *610826) and congenital lethal pontocerebellar hypoplasia (PCH). To date, 18 patients from 13 families have been reported, presenting with the key clinical features of optic atrophy, peripheral neuropathy, and cerebellar atrophy. The course of the disease was highly variable ranging from severe muscular hypotonia at birth and early death to first manifestations in late childhood and survival into the fifties. Here we report on 4 patients from 2 families diagnosed with PCH who died within the first month of life from respiratory insufficiency. Patients from 1 family had pathoanatomically proven spinal motor neuron degeneration (PCH1). Using exome sequencing, we identified biallelic disease-segregating loss-of-function mutations in SLC25A46 in both families. Our study adds to the definition of the SLC25A46-associated phenotypic spectrum that includes neonatal fatalities due to PCH as the severe extreme.
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Affiliation(s)
- M C Braunisch
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.,Department of Nephrology, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - H Gallwitz
- Department of Pediatrics, Socio-Pediatric Center, Klinikum Memmingen, Memmingen, Germany
| | - A Abicht
- Medical Genetics Center, Munich, Germany.,Friedrich-Baur-Institut, Neurologische Klinik und Poliklinik, Klinikum der Universität München, Munich, Germany
| | - I Diebold
- Medical Genetics Center, Munich, Germany
| | - E Holinski-Feder
- Medical Genetics Center, Munich, Germany.,Medizinische Klinik und Poliklinik IV, Campus Innenstadt, Klinikum der Universität München, Munich, Germany
| | - L Van Maldergem
- Center for Human Genetics, University of Franche-Comté, Besançon, France
| | - M Lammens
- Department of Pathology, Antwerp University Hospital, Edegem, Belgium.,Department of Neuropathology, Born Bunge Institute, Antwerp University, Wilrijk, Belgium
| | - R Kovács-Nagy
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - B Alhaddad
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, Munich, Germany
| | - T M Strom
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.,Institute of Human Genetics, Helmholtz Zentrum München, Neuherberg, Germany
| | - T Meitinger
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.,Institute of Human Genetics, Helmholtz Zentrum München, Neuherberg, Germany
| | - J Senderek
- Friedrich-Baur-Institut, Neurologische Klinik und Poliklinik, Klinikum der Universität München, Munich, Germany
| | - S Rudnik-Schöneborn
- Division of Human Genetics, Medical University Innsbruck, Innsbruck, Austria.,Institut für Humangenetik, Uniklinik RWTH Aachen, Aachen, Germany
| | - T B Haack
- Institute of Human Genetics, Klinikum rechts der Isar, Technische Universität München, Munich, Germany.,Institute of Human Genetics, Helmholtz Zentrum München, Neuherberg, Germany.,Institute of Medical Genetics and Applied Genomics, University of Tübingen, Tübingen, Germany
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8
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Hu H, Haas SA, Chelly J, Van Esch H, Raynaud M, de Brouwer APM, Weinert S, Froyen G, Frints SGM, Laumonnier F, Zemojtel T, Love MI, Richard H, Emde AK, Bienek M, Jensen C, Hambrock M, Fischer U, Langnick C, Feldkamp M, Wissink-Lindhout W, Lebrun N, Castelnau L, Rucci J, Montjean R, Dorseuil O, Billuart P, Stuhlmann T, Shaw M, Corbett MA, Gardner A, Willis-Owen S, Tan C, Friend KL, Belet S, van Roozendaal KEP, Jimenez-Pocquet M, Moizard MP, Ronce N, Sun R, O'Keeffe S, Chenna R, van Bömmel A, Göke J, Hackett A, Field M, Christie L, Boyle J, Haan E, Nelson J, Turner G, Baynam G, Gillessen-Kaesbach G, Müller U, Steinberger D, Budny B, Badura-Stronka M, Latos-Bieleńska A, Ousager LB, Wieacker P, Rodríguez Criado G, Bondeson ML, Annerén G, Dufke A, Cohen M, Van Maldergem L, Vincent-Delorme C, Echenne B, Simon-Bouy B, Kleefstra T, Willemsen M, Fryns JP, Devriendt K, Ullmann R, Vingron M, Wrogemann K, Wienker TF, Tzschach A, van Bokhoven H, Gecz J, Jentsch TJ, Chen W, Ropers HH, Kalscheuer VM. X-exome sequencing of 405 unresolved families identifies seven novel intellectual disability genes. Mol Psychiatry 2016; 21:133-48. [PMID: 25644381 PMCID: PMC5414091 DOI: 10.1038/mp.2014.193] [Citation(s) in RCA: 208] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Revised: 11/17/2014] [Accepted: 12/08/2014] [Indexed: 12/27/2022]
Abstract
X-linked intellectual disability (XLID) is a clinically and genetically heterogeneous disorder. During the past two decades in excess of 100 X-chromosome ID genes have been identified. Yet, a large number of families mapping to the X-chromosome remained unresolved suggesting that more XLID genes or loci are yet to be identified. Here, we have investigated 405 unresolved families with XLID. We employed massively parallel sequencing of all X-chromosome exons in the index males. The majority of these males were previously tested negative for copy number variations and for mutations in a subset of known XLID genes by Sanger sequencing. In total, 745 X-chromosomal genes were screened. After stringent filtering, a total of 1297 non-recurrent exonic variants remained for prioritization. Co-segregation analysis of potential clinically relevant changes revealed that 80 families (20%) carried pathogenic variants in established XLID genes. In 19 families, we detected likely causative protein truncating and missense variants in 7 novel and validated XLID genes (CLCN4, CNKSR2, FRMPD4, KLHL15, LAS1L, RLIM and USP27X) and potentially deleterious variants in 2 novel candidate XLID genes (CDK16 and TAF1). We show that the CLCN4 and CNKSR2 variants impair protein functions as indicated by electrophysiological studies and altered differentiation of cultured primary neurons from Clcn4(-/-) mice or after mRNA knock-down. The newly identified and candidate XLID proteins belong to pathways and networks with established roles in cognitive function and intellectual disability in particular. We suggest that systematic sequencing of all X-chromosomal genes in a cohort of patients with genetic evidence for X-chromosome locus involvement may resolve up to 58% of Fragile X-negative cases.
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Affiliation(s)
- H Hu
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - S A Haas
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - J Chelly
- University Paris Descartes, Paris, France,Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Institut National de la Santé et de la Recherche Médicale Unité 1016, Institut Cochin, Paris, France
| | - H Van Esch
- Center for Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - M Raynaud
- Inserm U930 ‘Imaging and Brain', Tours, France,University François-Rabelais, Tours, France,Centre Hospitalier Régional Universitaire, Service de Génétique, Tours, France
| | - A P M de Brouwer
- Department of Human Genetics, Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - S Weinert
- Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany,Leibniz-Institut für Molekulare Pharmakologie, Berlin, Germany
| | - G Froyen
- Human Genome Laboratory, VIB Center for the Biology of Disease, Leuven, Belgium,Human Genome Laboratory, Department of Human Genetics, K.U. Leuven, Leuven, Belgium
| | - S G M Frints
- Department of Clinical Genetics, Maastricht University Medical Center, azM, Maastricht, The Netherlands,School for Oncology and Developmental Biology, GROW, Maastricht University, Maastricht, The Netherlands
| | - F Laumonnier
- Inserm U930 ‘Imaging and Brain', Tours, France,University François-Rabelais, Tours, France
| | - T Zemojtel
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - M I Love
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - H Richard
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - A-K Emde
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - M Bienek
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - C Jensen
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - M Hambrock
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - U Fischer
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - C Langnick
- Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany
| | - M Feldkamp
- Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany
| | - W Wissink-Lindhout
- Department of Human Genetics, Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - N Lebrun
- University Paris Descartes, Paris, France,Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Institut National de la Santé et de la Recherche Médicale Unité 1016, Institut Cochin, Paris, France
| | - L Castelnau
- University Paris Descartes, Paris, France,Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Institut National de la Santé et de la Recherche Médicale Unité 1016, Institut Cochin, Paris, France
| | - J Rucci
- University Paris Descartes, Paris, France,Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Institut National de la Santé et de la Recherche Médicale Unité 1016, Institut Cochin, Paris, France
| | - R Montjean
- University Paris Descartes, Paris, France,Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Institut National de la Santé et de la Recherche Médicale Unité 1016, Institut Cochin, Paris, France
| | - O Dorseuil
- University Paris Descartes, Paris, France,Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Institut National de la Santé et de la Recherche Médicale Unité 1016, Institut Cochin, Paris, France
| | - P Billuart
- University Paris Descartes, Paris, France,Centre National de la Recherche Scientifique Unité Mixte de Recherche 8104, Institut National de la Santé et de la Recherche Médicale Unité 1016, Institut Cochin, Paris, France
| | - T Stuhlmann
- Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany,Leibniz-Institut für Molekulare Pharmakologie, Berlin, Germany
| | - M Shaw
- School of Paediatrics and Reproductive Health, The University of Adelaide, Adelaide, SA, Australia,Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
| | - M A Corbett
- School of Paediatrics and Reproductive Health, The University of Adelaide, Adelaide, SA, Australia,Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
| | - A Gardner
- School of Paediatrics and Reproductive Health, The University of Adelaide, Adelaide, SA, Australia,Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
| | - S Willis-Owen
- School of Paediatrics and Reproductive Health, The University of Adelaide, Adelaide, SA, Australia,National Heart and Lung Institute, Imperial College London, London, UK
| | - C Tan
- School of Paediatrics and Reproductive Health, The University of Adelaide, Adelaide, SA, Australia
| | - K L Friend
- SA Pathology, Women's and Children's Hospital, Adelaide, SA, Australia
| | - S Belet
- Human Genome Laboratory, VIB Center for the Biology of Disease, Leuven, Belgium,Human Genome Laboratory, Department of Human Genetics, K.U. Leuven, Leuven, Belgium
| | - K E P van Roozendaal
- Department of Clinical Genetics, Maastricht University Medical Center, azM, Maastricht, The Netherlands,School for Oncology and Developmental Biology, GROW, Maastricht University, Maastricht, The Netherlands
| | - M Jimenez-Pocquet
- Centre Hospitalier Régional Universitaire, Service de Génétique, Tours, France
| | - M-P Moizard
- Inserm U930 ‘Imaging and Brain', Tours, France,University François-Rabelais, Tours, France,Centre Hospitalier Régional Universitaire, Service de Génétique, Tours, France
| | - N Ronce
- Inserm U930 ‘Imaging and Brain', Tours, France,University François-Rabelais, Tours, France,Centre Hospitalier Régional Universitaire, Service de Génétique, Tours, France
| | - R Sun
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - S O'Keeffe
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - R Chenna
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - A van Bömmel
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - J Göke
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - A Hackett
- Genetics of Learning and Disability Service, Hunter Genetics, Waratah, NSW, Australia
| | - M Field
- Genetics of Learning and Disability Service, Hunter Genetics, Waratah, NSW, Australia
| | - L Christie
- Genetics of Learning and Disability Service, Hunter Genetics, Waratah, NSW, Australia
| | - J Boyle
- Genetics of Learning and Disability Service, Hunter Genetics, Waratah, NSW, Australia
| | - E Haan
- School of Paediatrics and Reproductive Health, The University of Adelaide, Adelaide, SA, Australia,SA Pathology, Women's and Children's Hospital, Adelaide, SA, Australia
| | - J Nelson
- Genetic Services of Western Australia, King Edward Memorial Hospital, Perth, WA, Australia
| | - G Turner
- Genetics of Learning and Disability Service, Hunter Genetics, Waratah, NSW, Australia
| | - G Baynam
- Genetic Services of Western Australia, King Edward Memorial Hospital, Perth, WA, Australia,School of Paediatrics and Child Health, University of Western Australia, Perth, WA, Australia,Institute for Immunology and Infectious Diseases, Murdoch University, Perth, WA, Australia,Telethon Kids Institute, Perth, WA, Australia
| | | | - U Müller
- Institut für Humangenetik, Justus-Liebig-Universität Giessen, Giessen, Germany,bio.logis Center for Human Genetics, Frankfurt a. M., Germany
| | - D Steinberger
- Institut für Humangenetik, Justus-Liebig-Universität Giessen, Giessen, Germany,bio.logis Center for Human Genetics, Frankfurt a. M., Germany
| | - B Budny
- Chair and Department of Endocrinology, Metabolism and Internal Diseases, Ponzan University of Medical Sciences, Poznan, Poland
| | - M Badura-Stronka
- Chair and Department of Medical Genetics, Poznan University of Medical Sciences, Poznan, Poland
| | - A Latos-Bieleńska
- Chair and Department of Medical Genetics, Poznan University of Medical Sciences, Poznan, Poland
| | - L B Ousager
- Department of Clinical Genetics, Odense University Hospital, Odense, Denmark
| | - P Wieacker
- Institut für Humangenetik, Universitätsklinikum Münster, Muenster, Germany
| | | | - M-L Bondeson
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - G Annerén
- Department of Immunology, Genetics and Pathology, Uppsala University, Uppsala, Sweden
| | - A Dufke
- Institut für Medizinische Genetik und Angewandte Genomik, Tübingen, Germany
| | - M Cohen
- Kinderzentrum München, München, Germany
| | - L Van Maldergem
- Centre de Génétique Humaine, Université de Franche-Comté, Besançon, France
| | - C Vincent-Delorme
- Service de Génétique, Hôpital Jeanne de Flandre CHRU de Lilles, Lille, France
| | - B Echenne
- Service de Neuro-Pédiatrie, CHU Montpellier, Montpellier, France
| | - B Simon-Bouy
- Laboratoire SESEP, Centre hospitalier de Versailles, Le Chesnay, France
| | - T Kleefstra
- Department of Human Genetics, Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - M Willemsen
- Department of Human Genetics, Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - J-P Fryns
- Center for Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - K Devriendt
- Center for Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - R Ullmann
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - M Vingron
- Department of Computational Molecular Biology, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - K Wrogemann
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany,Department of Biochemistry and Medical Genetics, University of Manitoba, Winnipeg, MB, Canada
| | - T F Wienker
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - A Tzschach
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - H van Bokhoven
- Department of Human Genetics, Radboud University Medical Center, Donders Institute for Brain, Cognition and Behaviour, Nijmegen, The Netherlands
| | - J Gecz
- School of Paediatrics and Reproductive Health, The University of Adelaide, Adelaide, SA, Australia,Robinson Research Institute, The University of Adelaide, Adelaide, SA, Australia
| | - T J Jentsch
- Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany,Leibniz-Institut für Molekulare Pharmakologie, Berlin, Germany
| | - W Chen
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany,Max-Delbrück-Centrum für Molekulare Medizin, Berlin, Germany
| | - H-H Ropers
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany
| | - V M Kalscheuer
- Department of Human Molecular Genetics, Max Planck Institute for Molecular Genetics, Berlin, Germany,Max Planck Institute for Molecular Genetics, Ihnestrasse 73, Berlin 14195, Germany. E-mail:
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9
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Cabrol C, Delobeau M, Bienvenu T, Ruaud L, Girodon E, Noacco G, Fanian F, Van Maldergem L, Aubin F. Kératodermie aquagénique et mutations du gène CFTR. Ann Dermatol Venereol 2015. [DOI: 10.1016/j.annder.2015.10.346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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10
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Haghighi A, Kavehmanesh Z, Haghighi A, Salehzadeh F, Santos-Simarro F, Van Maldergem L, Cimbalistiene L, Collins F, Chopra M, Al-Sinani S, Dastmalchian S, de Silva DC, Bakhti H, Garg A, Hilbert P. Congenital generalized lipodystrophy: identification of novel variants and expansion of clinical spectrum. Clin Genet 2015; 89:434-441. [PMID: 26072926 DOI: 10.1111/cge.12623] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2015] [Revised: 06/08/2015] [Accepted: 06/11/2015] [Indexed: 11/29/2022]
Abstract
Congenital generalized lipodystrophy (CGL) is an autosomal recessive disorder with two major subtypes. Variants in AGPAT2 result in CGL type 1 with milder manifestations, whereas BSCL2 variants cause CGL type 2 with more severe features. Muscle hypertrophy caused by lack of adipose tissue is present early in life in CGL patients. Our aim was to investigate 10 CGL patients from 7 different countries and report genotype-phenotype relationships. Genetic analysis identified disease-causing variants in AGPAT2 (five patients) and in BSCL2 (five patients), including three novel variants; c.134C>A (p.Ser45*), c.216C>G (p.Tyr72*) in AGPAT2 and c.458C>A (p.Ser153*) in BSCL2. We also report possible novel clinical features such as anemia, breast enlargement, steatorrhea, intraventricular hemorrhage and nephrolithiasis in CGL patients. Generalized lipodystrophy and muscular hypertrophy were the only features in all of our patients. Hepatomegaly was the second common feature. Some manifestations were exclusively noticed in our CGL2 patients; hypertrichosis, high-pitched voice and umbilical hernia. Bone cysts and history of seizures were noticed only in CGL1 patients. The findings of this study expand our knowledge of genotype-phenotype correlations in CGL patients. These results have important clinical applications in diagnosis and management of the CGL patients as well as in genetic counseling in families at-risk.
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Affiliation(s)
- A Haghighi
- Department of Genetics, Harvard Medical School, Boston, MA, USA.,Department of Medicine and the Howard Hughes Medical Institute, Brigham and Women's Hospital, Boston, MA, USA.,Wellcome Trust Centre for Human Genetics, University of Oxford, Oxford, UK
| | - Z Kavehmanesh
- Research Center for Gastroenterology and Liver Diseases, Baqiyatallah University of Medical Sciences, Tehran, Iran
| | - A Haghighi
- Toronto General Hospital, University of Toronto, Toronto, Canada
| | - F Salehzadeh
- Pediatric Department, Bouali Hospital, Ardabil University of Medical Sciences, Ardabil, Iran
| | - F Santos-Simarro
- CIBERER, Centro de Investigación Biomédica en Red de Enfermedades Raras, ISCIII, Madrid, Spain.,Clinical Genetics Unit, INGEMM, IdiPAZ, Hospital Universitario La Paz, UAM, Madrid, Spain
| | - L Van Maldergem
- Centre de génétique humaine, Université de FRanche-Comté, Besançon, France
| | - L Cimbalistiene
- Department of Human and Medical Genetics, Vilnius University, Vilnius, Lithuania
| | - F Collins
- Department of Clinical Genetics, Children's Hospital at Westmead, Sydney, Australia
| | - M Chopra
- Department of Medical Genomics, Royal Prince Alfred Hospital, Camperdown, Sydney, Australia
| | - S Al-Sinani
- Gastroenterology Unit, Department of Child Health, Sultan Qaboos University Hospital, Muscat, Oman
| | - S Dastmalchian
- Case Medical Center, Case Western Reserve University, Cleveland, OH, USA
| | - D C de Silva
- Department of Physiology, Faculty of Medicine, University of Kelaniya, Ragama, Sri Lanka
| | - H Bakhti
- Pathology Department, Takht-e Jamshid Hospital, Karaj, Iran
| | - A Garg
- Division of Nutrition and Metabolic Diseases, Department of Internal Medicine and the Center for Human Nutrition, UT Southwestern Medical Center, Dallas, TX, USA
| | - P Hilbert
- Institute of Pathology and Genetics, Gosselies, Belgium
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11
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Lechien JR, Brotchi J, Van Maldergem L, Costa de Araujo P, Bruninx G, Hilbert P, Nubourgh Y. Li-Fraumeni syndrome: multiple distinct brain tumours in two brothers. Neurochirurgie 2014; 60:51-4. [PMID: 24636404 DOI: 10.1016/j.neuchi.2013.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2013] [Revised: 10/21/2013] [Accepted: 11/13/2013] [Indexed: 11/16/2022]
Abstract
Li-Fraumeni syndrome is a rare autosomal dominant cancer-prone condition characterized by the occurrence of a large set of different types of cancer in a patient and their family. A germline disease-causing mutation of the gene encoding the p53 protein is associated with the syndrome. We report on a family in which segregation of a TP53 mutation in two generations was associated with two brain tumours, a leiomyosarcoma and a thyroid carcinoma in four male patients. The main patient presented with seizures revealing several primary brain tumours. We review recent views on its molecular basis and discuss management of the condition as well as a review of the literature.
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Affiliation(s)
- J R Lechien
- Department of Anatomy, Faculty of Medicine, University of Mons, avenue du Champ-de-Mars, 6, 7000 Mons, Belgium.
| | - J Brotchi
- Department of Neurosurgery, Erasme Hospital, Université Libre de Bruxelles, Bruxelles, Belgium
| | | | - P Costa de Araujo
- Department of Anatomy, Faculty of Medicine, University of Mons, avenue du Champ-de-Mars, 6, 7000 Mons, Belgium
| | - G Bruninx
- Department of Radiology, CHU Charleroi, Université Libre de Bruxelles, Bruxelles, Belgium
| | - P Hilbert
- Institute of Pathology and Genetics, avenue Georges-Lemaître, 25, 6041 Gosselies, Belgium
| | - Y Nubourgh
- Department of Neurosurgery, CHU Charleroi, Université Libre de Bruxelles, Bruxelles, Belgium
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12
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van der Crabben SN, Verhoeven-Duif NM, Brilstra EH, Van Maldergem L, Coskun T, Rubio-Gozalbo E, Berger R, de Koning TJ. An update on serine deficiency disorders. J Inherit Metab Dis 2013; 36:613-9. [PMID: 23463425 DOI: 10.1007/s10545-013-9592-4] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/20/2012] [Revised: 01/17/2013] [Accepted: 01/21/2013] [Indexed: 11/28/2022]
Abstract
Serine deficiency disorders are caused by a defect in one of the three synthesising enzymes of the L-serine biosynthesis pathway. Serine deficiency disorders give rise to a neurological phenotype with psychomotor retardation, microcephaly and seizures in newborns and children or progressive polyneuropathy in adult patients. There are three defects that cause serine deficiency of which 3-phosphoglycerate dehydrogenase (3-PGDH) deficiency, the defect affecting the first step in the pathway, has been reported most frequently. The other two disorders in L-serine biosynthesis phosphoserine aminotransferase (PSAT) deficiency and phosphoserine phosphatase (PSP) deficiency have been reported only in a limited number of patients. The biochemical hallmarks of all three disorders are low concentrations of serine in cerebrospinal fluid and plasma. Prompt recognition of affected patients is important, since serine deficiency disorders are treatable causes of neurometabolic disorders. The use of age-related reference values for serine in CSF and plasma can be of great help in establishing a correct diagnosis of serine deficiency, in particular in newborns and young children.
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Affiliation(s)
- S N van der Crabben
- Department of Medical Genetics, University Medical Center Utrecht, Utrecht, The Netherlands
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13
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Thauvin-Robinet C, Thomas S, Sinico M, Aral B, Burglen L, Gigot N, Dollfus H, Rossignol S, Raynaud M, Philippe C, Badens C, Touraine R, Gomes C, Franco B, Lopez E, Elkhartoufi N, Faivre L, Munnich A, Boddaert N, Van Maldergem L, Encha-Razavi F, Lyonnet S, Vekemans M, Escudier E, Attié-Bitach T. OFD1 mutations in males: phenotypic spectrum and ciliary basal body docking impairment. Clin Genet 2012; 84:86-90. [PMID: 23036093 DOI: 10.1111/cge.12013] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2012] [Revised: 08/22/2012] [Accepted: 09/04/2012] [Indexed: 12/30/2022]
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14
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Karakurt C, Koçak G, Elkiran O, Coucke PJ, Van Maldergem L. Arterial tortuosity syndrome: case report. Genet Couns 2012; 23:477-482. [PMID: 23431747] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Arterial tortuosity syndrome (ATS; OMIM 208050) is a rare autosomal recessive condition characterized by dysmorphic features, elongation, tortuosity, and aneurysm of the large and middle sized arteries. We report on a 13-year-old boy who presented with a malformed ascending aorta mimicking coarctation of aorta and a cutis laxa-like facial dysmorphia. Based on angiogram, a diagnosis of ATS was made and subsequently confirmed by a homozygous one base-pair deletion at position g.318 of SLCA10. We stress similarities (facial appearance, inguinal herniae, ..) between ATS and autosomal recessive cutis laxa, both being connective tissue disorders disorganizing the elastin network.
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Affiliation(s)
- C Karakurt
- Department of Paediatric Cardiology, Faculty of Medicine, Malatya, Turkey.
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15
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Marlin S, Jonard L, Loundon N, Bonnet C, Leboulanger N, Van Maldergem L, Gherbi S, Louha M, Deltenre P, Collette J, Couderc R, Garabedian E, Denoyelle F. Genetic Update on Auditory Neuropathy. Audiol Neurotol Extra 2011. [DOI: 10.1159/000329545] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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16
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Desmyter L, Ghassibe M, Revencu N, Boute O, Lees M, François G, Verellen-Dumoulin C, Sznajer Y, Moncla A, Benateau H, Claes K, Devriendt K, Mathieu M, Van Maldergem L, Addor MC, Drouin-Garraud V, Mortier G, Bouma M, Dieux-Coeslier A, Genevieve D, Goldenberg A, Gozu A, Makrythanasis P, McEntagart U, Sanchez A, Vilain C, Vermeer S, Connell F, Verheij J, Manouvrier S, Pierquin G, Odent S, Holder-Espinasse M, Vincent-Delorme C, Gillerot Y, Vanwijck R, Bayet B, Vikkula M. IRF6 Screening of Syndromic and a priori Non-Syndromic Cleft Lip and Palate Patients: Identification of a New Type of Minor VWS Sign. Mol Syndromol 2010; 1:67-74. [PMID: 21045959 DOI: 10.1159/000313786] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Van der Woude syndrome (VWS), caused by dominant IRF6 mutation, is the most common cleft syndrome. In 15% of the patients, lip pits are absent and the phenotype mimics isolated clefts. Therefore, we hypothesized that some of the families classified as having non-syndromic inherited cleft lip and palate could have an IRF6 mutation. We screened in total 170 patients with cleft lip with or without cleft palate (CL/P): 75 were syndromic and 95 were a priori part of multiplex non-syndromic families. A mutation was identified in 62.7 and 3.3% of the patients, respectively. In one of the 95 a priori non-syndromic families with an autosomal dominant inheritance (family B), new insights into the family history revealed the presence, at birth, of lower lip pits in two members and the diagnosis was revised as VWS. A novel lower lip sign was observed in one individual in this family. Interestingly, a similar lower lip sign was also observed in one individual from a 2nd family (family A). This consists of 2 nodules below the lower lip on the external side. In a 3rd multiplex family (family C), a de novo mutation was identified in an a priori non-syndromic CL/P patient. Re-examination after mutation screening revealed the presence of a tiny pit-looking lesion on the inner side of the lower lip leading to a revised diagnosis of VWS. On the basis of this data, we conclude that IRF6 should be screened when any doubt rises about the normality of the lower lip and also if a non-syndromic cleft lip patient (with or without cleft palate) has a family history suggestive of autosomal dominant inheritance.
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Affiliation(s)
- L Desmyter
- Laboratory of Human Molecular Genetics, de Duve Institute, Belgium, France
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17
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Saal S, Faivre L, Aral B, Gigot N, Toutain A, Van Maldergem L, Destree A, Maystadt I, Cosyns JP, Jouk PS, Loeys B, Chauveau D, Bieth E, Layet V, Mathieu M, Lespinasse J, Teebi A, Franco B, Gautier E, Binquet C, Masurel-Paulet A, Mousson C, Gouyon JB, Huet F, Thauvin-Robinet C. Renal insufficiency, a frequent complication with age in oral-facial-digital syndrome type I. Clin Genet 2009; 77:258-65. [PMID: 19817772 DOI: 10.1111/j.1399-0004.2009.01290.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The oral-facial-digital syndrome type I (OFD I) is characterized by multiple congenital malformations of the face, oral cavity and digits. A polycystic kidney disease (PKD) is found in about one-third of patients but long-term outcome and complications are not well described in the international literature. Renal findings have been retrospectively collected in a cohort of 34 females all carrying a pathogenic mutation in the OFD1 gene with ages ranging from 1 to 65 years. Twelve patients presented with PKD - 11/16 (69%) if only adults were considered -with a median age at diagnosis of 29 years [IQR (interquartile range) = (23.5-38)]. Among them, 10 also presented with renal impairment and 6 were grafted (median age = 38 years [IQR = (25-48)]. One grafted patient under immunosuppressive treatment died from a tumor originated from a native kidney. The probability to develop renal failure was estimated to be more than 50% after the age of 36 years. Besides, neither genotype-phenotype correlation nor clinical predictive association with renal failure could be evidenced. These data reveal an unsuspected high incidence rate of the renal impairment outcome in OFD I syndrome. A systematic ultrasound (US) and renal function follow-up is therefore highly recommended for all OFD I patients.
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Affiliation(s)
- S Saal
- Centre de Génétique, Hôpital d'Enfants, CHU Dijon, France
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Friguls B, Coroleu W, Alcazar D, Hilbert P, Van Maldergem L, Pintos-Morell G. Corrigendum to “Severe cardiac phenotype of Berardinelli-Seip congenital lipodystrophy in an infant with a E158X BSCL2 mutation” [Eur. J. Med. Genet. 52 (1) (2009) 14–16]. Eur J Med Genet 2009. [DOI: 10.1016/j.ejmg.2009.03.008] [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: 11/25/2022]
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Shirwalkar HU, Patel ZM, Magre J, Hilbert P, Van Maldergem L, Mukhopadhyay RR, Maitra A. Congenital generalized lipodystrophy in an Indian patient with a novel mutation in BSCL2 gene. J Inherit Metab Dis 2008; 31 Suppl 2:S317-22. [PMID: 18690553 DOI: 10.1007/s10545-008-0899-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2008] [Revised: 05/13/2008] [Accepted: 06/26/2008] [Indexed: 11/30/2022]
Abstract
Congenital generalized lipodystrophy (CGL) is an autosomal recessive metabolic syndrome with involvement of multiple organs. Mutations in BSCL2 are known to be associated with a severe form of CGL and mental retardation (MR). The genetic heterogeneity in CGL patients is accompanied by phenotypic heterogeneity in different ethnic groups. Studies in the Indian context are very few in this regard. We report here a detailed clinical analysis of a CGL case from infancy to adult hood. Interestingly, the patient was found to be homozygous for a novel BSCL2 mutation, but with normal intellectual development contrasting with the MR associated with BSCL2 mutation in CGL patients. The biochemical investigations at the time of diagnosis (9 months) included total cholesterol, total lipids, triglycerides, phospholipids, β-lipoprotein and free fatty acids, which were above normal limits. The clinical phenotype, viz. lack of subcutaneous fat, hepatosplenomegaly, cardiomegaly, and advanced bone age was also documented. The patient was found to be insulin resistant and diabetes mellitus was diagnosed by age 13 years. Ultrasonography of the ovaries at age 22 showed polycystic features with elevated levels of gonadotropins and negligible levels of serum leptin. For genetic analysis, direct DNA sequencing of BSCL2 was carried out and disclosed an 11-base-pair deletion in exon 6 (H217fsX272) resulting in a truncated protein. This is a novel mutation that contributes to CGL formation in a family of Indian origin and adds to the array of variants reported in this disorder. Moreover, the novel mutation is found to be associated with normal intellectual ability.
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Affiliation(s)
- H U Shirwalkar
- Department of Molecular Endocrinology, National Institute for Research in Reproductive Health (ICMR), Jehangir Merwanji Street, Parel, Mumbai, 400 012, India
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20
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Friguls B, Coroleu W, del Alcazar R, Hilbert P, Van Maldergem L, Pintos-Morell G. Severe cardiac phenotype of Berardinelli-Seip congenital lipodystrophy in an infant with homozygous E189X BSCL2 mutation. Eur J Med Genet 2008; 52:14-6. [PMID: 19041432 DOI: 10.1016/j.ejmg.2008.10.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2008] [Accepted: 10/26/2008] [Indexed: 10/21/2022]
Abstract
Berardinelli-Seip congenital lipodystrophy (BSCL) is a rare autosomal recessive condition associating insulin resistance, absence of subcutaneous fat and muscular hypertrophy. Disease-causing mutations have been described in AGPAT2 and BSCL2 genes. Hypertrophic cardiomyopathy is a classical late (third decade) complication which has only been occasionally described in childhood. We report on a 4-month-old Chinese male infant who presented with a severe BSCL "cardiac" phenotype comprising heart failure, hypertension and hypertrophic cardiomyopathy.
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Affiliation(s)
- B Friguls
- Department of Paediatrics, Germans Trias i Pujol Hospital, Badalona, Autonomous University of Barcelona, Spain
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21
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Van Maldergem L, Yuksel-Apak M, Kayserili H, Seemanova E, Giurgea S, Basel-Vanagaite L, Leao-Teles E, Vigneron J, Foulon M, Greally M, Jaeken J, Mundlos S, Dobyns WB. Cobblestone-like brain dysgenesis and altered glycosylation in congenital cutis laxa, Debre type. Neurology 2008; 71:1602-8. [PMID: 18716235 DOI: 10.1212/01.wnl.0000327822.52212.c7] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
OBJECTIVE To delineate a new syndrome of brain dysgenesis and cutis laxa based on the description of 11 patients belonging to nine unrelated families recruited through an international collaboration effort. METHODS Careful clinical assessment of patients from birth to the age of 23 years with follow-up studies ranging from 3 to 20 years. Biochemical studies of serum proteins glycosylation by isoelectric focusing and capillary zone electrophoresis were performed in 10 patients. Brain MRI studies using conventional methods were analyzed in eight patients. RESULTS An expanded clinical spectrum of a syndrome comprising facial dysmorphia (enlarged anterior fontanelles, downward slant of palpebral fissures, prominent root of the nose), a connective tissue disorder (inguinal hernia, hip dislocation, high myopia), and neurologic impairment was defined. Early developmental delay was followed by onset of generalized seizures by the end of the first decade and a subsequent neurodegenerative course. A defect of N- or N- plus O-glycosylation of serum transferrins and ApoCIII was observed in 10 patients. An unusual cobblestone-like cortical malformation over the frontal and parietal regions was seen in eight patients and cerebellar abnormalities, including two patients with Dandy-Walker malformation, were observed in three patients. CONCLUSIONS Our results suggest that autosomal recessive cutis laxa, Debré type, initially considered a dermatologic syndrome, is a multisystemic disorder with cobblestone-like brain dysgenesis manifesting as developmental delay and an epileptic neurodegenerative syndrome. It might represent a metabolic cause of Dandy-Walker malformation. It is associated with a deficient N- and-O glycosylation of proteins and shares many similarities with muscle-eye-brain syndromes.
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Affiliation(s)
- L Van Maldergem
- Centre de Génétique Humaine, CHU Sart-Tilman, Université de Liège, 4000 Liège, Belgium.
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22
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Menko FH, Kneepkens CMF, de Leeuw N, Peeters EAJ, Van Maldergem L, Kamsteeg EJ, Davidson R, Rozendaal L, Lasham CA, Peeters-Scholte CMP, Jansweijer MC, Hilhorst-Hofstee Y, Gille JJP, Heins YM, Nieuwint AWM, Sistermans EA. Variable phenotypes associated with 10q23 microdeletions involving the PTEN and BMPR1A genes. Clin Genet 2008; 74:145-54. [PMID: 18510548 DOI: 10.1111/j.1399-0004.2008.01026.x] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Infantile juvenile polyposis is a rare disease with severe gastrointestinal symptoms and a grave clinical course. Recently, 10q23 microdeletions involving the PTEN and BMPR1A genes were found in four patients with infantile juvenile polyposis. It was hypothesized that a combined and synergistic effect of the deletion of both genes would explain the condition. Subsequently, however, a patient with a larger 10q23 deletion including the same genes but with a mild clinical phenotype was identified. Here, we present four additional patients with 10q23 microdeletions involving the PTEN and BMPR1A genes. The sizes of the deletions were analyzed using single nucleotide polymorphism array analysis. All patients had macrocephaly, dysmorphic features, retardation and congenital abnormalities. One patient developed colorectal cancer. However, only one case had disease onset before 2 years of age and severe symptoms requiring colectomy. No clear correlation was found between ages at onset or severity of gastrointestinal symptoms and the sizes of the deletions. We conclude that patients with 10q23 microdeletions involving the PTEN and BMPR1A genes have variable clinical phenotypes, which cannot be explained merely by the deletion sizes. The phenotypes are not restricted to severe infantile juvenile polyposis but include childhood-onset cases with macrocephaly, retardation, mild gastrointestinal symptoms and possibly early-onset colorectal cancer.
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Affiliation(s)
- F H Menko
- Department of Clinical Genetics, VU University Medical Center, Amsterdam, the Netherlands.
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Limaye N, Revencu N, Van Regemorter N, Garzon M, Bonduelle M, Chung W, Daras MD, Fahey MC, Garrett C, Gillerot Y, Gillessen-Kaesbach G, Giménez-Arnau A, Guzzetta F, Battaglia D, Heimdal K, Lissens W, Taub E, Van Maldergem L, Van Paesschen W, Wieczorek D, Wood NW, Boon L, Vikkula M. Novel human pathological mutations. Gene symbol: KRIT1. Disease: cerebral cavernous malformation. Hum Genet 2007; 122:551. [PMID: 18383595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Nisha Limaye
- Institute of Cellular Pathology, Université Catholique de Louvain, Laboratory of Human Molecular Genetics, Avenue Hippocrate 74(+5), bp. 75.39, B-1200, Brussels, Belgium.
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Limaye N, Revencu N, Van Regemorter N, Garzon M, Bonduelle M, Chung W, Daras MD, Fahey MC, Garrett C, Gillerot Y, Gillessen-Kaesbach G, Giménez-Arnau A, Guzzetta F, Battaglia D, Heimdal K, Lissens W, Taub E, Van Maldergem L, Van Paesschen W, Wieczorek D, Wood NW, Boon L, Vikkula M. Novel human pathological mutations. Gene symbol: KRIT1. Disease: cerebral cavernous malformation. Hum Genet 2007; 122:550. [PMID: 18383588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Nisha Limaye
- Institute of Cellular Pathology, Université Catholique de Louvain, Laboratory of Human Molecular Genetics, Avenue Hippocrate, Brussels, Belgium.
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Limaye N, Revencu N, Van Regemorter N, Garzon M, Bonduelle M, Chung W, Daras MD, Fahey MC, Garrett C, Gillerot Y, Gillessen-Kaesbach G, Giménez-Arnau A, Guzzetta F, Battaglia D, Heimda K, Lissens W, Taub E, Van Maldergem L, Van Paesschen W, Wieczorek D, Wood NW, Boon L, Vikkula M. Novel human pathological mutations. Gene symbol: KRIT1. Disease: cerebral cavernous malformation. Hum Genet 2007; 122:549-550. [PMID: 18383587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Nisha Limaye
- Institute of Cellular Pathology, Université Catholique de Louvain, Laboratory of Human Molecular Genetics, Avenue Hippocrate, Brussels, Belgium.
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Limaye N, Revencu N, Van Regemorter N, Garzon M, Bonduelle M, Chung W, Daras MD, Fahey MC, Garrett C, Gillerot Y, Gillessen-Kaesbach G, Giménez-Arnau A, Guzzetta F, Battaglia D, Heimdal K, Lissens W, Taub E, Van Maldergem L, Van Paesschen W, Wieczorek D, Wood NW, Boon L, Vikkula M. Novel human pathological mutations. Gene symbol: KRIT1. Disease: cerebral cavernous malformation. Hum Genet 2007; 122:552. [PMID: 18383597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Nisha Limaye
- Institute of Cellular Pathology, Université Catholique de Louvain, Laboratory of Human Molecular Genetics, Avenue Hippocrate 74(+5), bp. 75.39, B-1200, Brussels, Belgium.
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Limaye N, Revencu N, Van Regemorter N, Garzon M, Bonduelle M, Chung W, Daras MD, Fahey MC, Garrett C, Gillerot Y, Gillessen-Kaesbach G, Giménez-Arnau A, Guzzetta F, Battaglia D, Heimdal K, Lissens W, Taub E, Van Maldergem L, Van Paesschen W, Wieczorek D, Wood NW, Boon L, Vikkula M. Novel human pathological mutations. Gene symbol: KRIT1. Disease: cerebral cavernous malformation. Hum Genet 2007; 122:551. [PMID: 18383591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Nisha Limaye
- Institute of Cellular Pathology, Université Catholique de Louvain, Laboratory of Human Molecular Genetics, Avenue Hippocrate, Brussels, Belgium.
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Limaye N, Revencu N, Van Regemorter N, Garzon M, Bonduelle M, Chung W, Daras MD, Fahey MC, Garrett C, Gillerot Y, Gillessen-Kaesbach G, Giménez-Arnau A, Guzzetta F, Battaglia D, Heimda K, Lissens W, Taub E, Van Maldergem L, Van Paesschen W, Wieczorek D, Wood NW, Boon L, Vikkula M. Novel human pathological mutations. Gene symbol: KRIT1. Disease: cerebral cavernous malformation. Hum Genet 2007; 122:549. [PMID: 18380023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Nisha Limaye
- Institute of Cellular Pathology, Université Catholique de Louvain, Laboratory of Human Molecular Genetics, Brussels, Belgium.
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29
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Limaye N, Revencu N, Van Regemorter N, Garzon M, Bonduelle M, Chung W, Daras MD, Fahey MC, Garrett C, Gillerot Y, Gillessen-Kaesbach G, Giménez-Arnau A, Guzzetta F, Battaglia D, Heimdal K, Lissens W, Taub E, Van Maldergem L, Van Paesschen W, Wieczorek D, Wood NW, Boon L, Vikkula M. Novel human pathological mutations. Gene symbol: KRIT1. Disease: cerebral cavernous malformation. Hum Genet 2007; 122:552. [PMID: 18383596] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Nisha Limaye
- Institute of Cellular Pathology, Université Catholique de Louvain, Laboratory of Human Molecular Genetics, Avenue Hippocrate 74(+5), bp. 75.39, B-1200, Brussels, Belgium.
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Limaye N, Revencu N, Van Regemorter N, Garzon M, Bonduelle M, Chung W, Daras MD, Fahey MC, Garrett C, Gillerot Y, Gillessen-Kaesbach G, Giménez-Arnau A, Guzzetta F, Battaglia D, Heimdal K, Lissens W, Taub E, Van Maldergem L, Van Paesschen W, Wieczorek D, Wood NW, Boon L, Vikkula M. Novel human pathological mutations. Gene symbol: KRIT1. Disease: cerebral cavernous malformation. Hum Genet 2007; 122:552. [PMID: 18383594] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Nisha Limaye
- Institute of Cellular Pathology, Université Catholique de Louvain, Laboratory of Human Molecular Genetics, Avenue Hippocrate 74(+5), bp. 75.39, B-1200, Brussels, Belgium.
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Limaye N, Revencu N, Van Regemorter N, Garzon M, Bonduelle M, Chung W, Daras MD, Fahey MC, Garrett C, Gillerot Y, Gillessen-Kaesbach G, Giménez-Arnau A, Guzzetta F, Battaglia D, Heimdal K, Lissens W, Taub E, Van Maldergem L, Van Paesschen W, Wieczorek D, Wood NW, Boon L, Vikkula M. Novel human pathological mutations. Gene symbol: KRIT1. Disease: cerebral cavernous malformation. Hum Genet 2007; 122:551. [PMID: 18383593] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Nisha Limaye
- Institute of Cellular Pathology, Université Catholique de Louvain, Laboratory of Human Molecular Genetics, Avenue Hippocrate, Brussels, Belgium.
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Limaye N, Revencu N, Van Regemorter N, Garzon M, Bonduelle M, Chung W, Daras MD, Fahey MC, Garrett C, Gillerot Y, Gillessen-Kaesbach G, Giménez-Arnau A, Guzzetta F, Battaglia D, Heimdal K, Lissens W, Taub E, Van Maldergem L, Van Paesschen W, Wieczorek D, Wood NW, Boon L, Vikkula M. Novel human pathological mutations. Gene symbol: KRIT1. Disease: cerebral cavernous malformation. Hum Genet 2007; 122:550. [PMID: 18383589] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Nisha Limaye
- Institute of Cellular Pathology, Université Catholique de Louvain, Laboratory of Human Molecular Genetics, Avenue Hippocrate, Brussels, Belgium.
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Limaye N, Revencu N, Van Regemorter N, Garzon M, Bonduelle M, Chung W, Daras MD, Fahey MC, Garrett C, Gillerot Y, Gillessen-Kaesbach G, Giménez-Arnau A, Guzzetta F, Battaglia D, Heimdal K, Lissens W, Taub E, Van Maldergem L, Van Paesschen W, Wieczorek D, Wood NW, Boon L, Vikkula M. Novel human pathological mutations. Gene symbol: KRIT1. Disease: cerebral cavernous malformation. Hum Genet 2007; 122:550. [PMID: 18383590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Affiliation(s)
- Nisha Limaye
- Institute of Cellular Pathology, Université Catholique de Louvain, Laboratory of Human Molecular Genetics, Avenue Hippocrate, Brussels, Belgium.
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Pittis MG, Montalvo ALE, Heikinheimo P, Sbaragli M, Balducci C, Persichetti E, Van Maldergem L, Filocamo M, Bembi B, Beccari T. Funtional characterization of four novel MAN2B1 mutations causing juvenile onset alpha-mannosidosis. Clin Chim Acta 2007; 375:136-9. [PMID: 16919251 DOI: 10.1016/j.cca.2006.06.034] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2006] [Revised: 06/26/2006] [Accepted: 06/26/2006] [Indexed: 10/24/2022]
Abstract
Alpha-mannosidosis is a recessively inherited disorder due to the deficiency of the lysosomal alpha-mannosidase. We report the molecular analysis performed in two patients with the late onset form of alpha-mannosidosis. Four new alleles were identified: three missense mutations involving highly conserved residues, c.597 C>A (p.H200N), c.1553 T>C (p.L518P) and c.2746 C>A (p.R916S) and a single nucleotide deletion, c.2660delC. In vitro expression studies in COS-1 cells demonstrated that pH200N, p.L518P and p.R916S proteins are expressed but retained no residual enzyme activity. These data are supported by structural 3D analysis which predicted that both p.L518P and p.R916S could affect the interaction of the small E-domain with the active site domain or the main body of the structure while the pH200N might alter substrate binding or other catalytic properties. Finally, the c.2660delC causes a frameshift introducing a premature stop codon (p.T887SfsX45), presuming to be a severe mutation.
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Affiliation(s)
- M G Pittis
- Unità Malattie Metaboliche, IRCCS Burlo Garofolo, Trieste, Italy
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Thauvin-Robinet C, Cossée M, Cormier-Daire V, Van Maldergem L, Toutain A, Alembik Y, Bieth E, Layet V, Parent P, David A, Goldenberg A, Mortier G, Héron D, Sagot P, Bouvier AM, Huet F, Cusin V, Donzel A, Devys D, Teyssier JR, Faivre L. Clinical, molecular, and genotype-phenotype correlation studies from 25 cases of oral-facial-digital syndrome type 1: a French and Belgian collaborative study. J Med Genet 2006; 43:54-61. [PMID: 16397067 PMCID: PMC2564504 DOI: 10.1136/jmg.2004.027672] [Citation(s) in RCA: 114] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Oral-facial-digital syndrome type 1 (OFD1) is characterised by an X linked dominant mode of inheritance with lethality in males. Clinical features include facial dysmorphism with oral, tooth, and distal abnormalities, polycystic kidney disease, and central nervous system malformations. Large interfamilial and intrafamilial clinical variability has been widely reported, and 18 distinct mutations have been previously reported within OFD1. A French and Belgian collaborative study collected 25 cases from 16 families. OFD1 was analysed using direct sequencing and phenotype-genotype correlation was performed using chi2 test. X inactivation studies were performed on blood lymphocytes. In 11 families, 11 novel mutations, including nine frameshift, one nonsense, and one missense mutation were identified, which spanned nine different exons. A combination of our results with previously reported cases showed that the majority of mutations (65.5%) was located in exons 3, 8, 9, 13, and 16. There was phenotype-genotype correlation between (a) polycystic kidney disease and splice mutations; (b) mental retardation and mutations located in exons 3, 8, 9, 13, and 16; and (c) tooth abnormalities and mutations located in coiled coil domains. Comparing the phenotype of the families with a pathogenic mutation to families with absence of OFD1 mutation, polycystic kidneys and short stature were significantly more frequent in the group with no OFD1 mutation, whereas lingual hamartomas were significantly more frequent in the group with OFD1 mutation. Finally, an X inactivation study showed non-random X inactivation in a third of the samples. Differential X inactivation between mothers and daughters in two families with high intrafamilial variability was of particular interest. Slight phenotype-genotype correlations were established, and X inactivation study showed that skewed X inactivation could be partially involved in the pathogenesis of intrafamilial clinical variability.
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Courtmans I, Mancilla V, Ligny C, Hilbert P, Mansbach AL, Van Maldergem L. Clinical findings and PDS mutations in 15 patients with hearing loss and dilatation of the vestibular aqueduct. J Laryngol Otol 2006; 121:312-7. [PMID: 17125574 DOI: 10.1017/s0022215106004245] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 08/10/2006] [Indexed: 11/06/2022]
Abstract
Following systematic skull imaging of hundred and sixty seven individuals attending a medical referral centre for the deaf in Brussels, Belgium, fifteen patients (9 per cent) aged between two and 25 years were diagnosed with dilatation of the vestibular aqueduct. Careful audiological study, with a baseline assessment then longitudinal follow up, indicated mild to profound deafness with a progressive course (i.e. an average loss of 3.3 dB per year) and frequent dizziness. Sequencing of PDS was performed in all individuals. Alterations of this gene (either homozygous, heterozygous or compound heterozygous base changes) were found in 53 per cent of patients with a large vestibular aqueduct. Four new mutations (two missense, a splice site and a four base pair insertion) were described. We were unable to confirm a correlation between homozygosity, heterozygosity and a Pendred or deafness-only phenotype.
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Affiliation(s)
- I Courtmans
- Centre Comprendre et Parler, Brussels, Belgium
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Sniekers M, Foulon V, Mannaerts GP, Van Maldergem L, Mandel H, Gelb BD, Casteels M, Van Veldhoven PP. Thiamine pyrophosphate: an essential cofactor for the alpha-oxidation in mammals--implications for thiamine deficiencies? Cell Mol Life Sci 2006; 63:1553-63. [PMID: 16786225 DOI: 10.1007/s00018-005-5603-4] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Abstract
The identification of 2-hydroxyphytanoyl-CoA lyase (2-HPCL), a thiamine pyrophosphate (TPP)-dependent peroxisomal enzyme involved in the alpha-oxidation of phytanic acid and of 2-hydroxy straight chain fatty acids, pointed towards a role of TPP in these processes. Until then, TPP had not been implicated in mammalian peroxisomal metabolism. The effect of thiamine deficiency on 2-HPCL and alpha-oxidation has not been studied, nor have possible adverse effects of deficient alpha-oxidation been considered in the pathogenesis of diseases associated with thiamine shortage, such as thiamine-responsive megaloblastic anemia (TRMA). Experiments with cultured cells and animal models showed that alpha-oxidation is controlled by the thiamine status of the cell/tissue/organism, and suggested that some pathological consequences of thiamine starvation could be related to impaired alpha-oxidation. Whereas accumulation of phytanic acid and/or 2-hydroxyfatty acids or their alpha-oxidation intermediates in TRMA patients given a normal supply of thiamine is unlikely, this may not be true when malnourished.
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Affiliation(s)
- M Sniekers
- Departement Moleculaire Celbiologie, Afdeling Farmacologie, Faculteit Geneeskunde, Katholieke Universiteit Leuven, O & N1, Herestraat 49, Box 601, 3000, Leuven, Belgium
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Parrini E, Ramazzotti A, Dobyns WB, Mei D, Moro F, Veggiotti P, Marini C, Brilstra EH, Dalla Bernardina B, Goodwin L, Bodell A, Jones MC, Nangeroni M, Palmeri S, Said E, Sander JW, Striano P, Takahashi Y, Van Maldergem L, Leonardi G, Wright M, Walsh CA, Guerrini R. Periventricular heterotopia: phenotypic heterogeneity and correlation with Filamin A mutations. Brain 2006; 129:1892-906. [PMID: 16684786 DOI: 10.1093/brain/awl125] [Citation(s) in RCA: 232] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Periventricular heterotopia (PH) occurs when collections of neurons lay along the lateral ventricles or just beneath. Human Filamin A gene (FLNA) mutations are associated with classical X-linked bilateral periventricular nodular heterotopia (PNH), featuring contiguous heterotopic nodules, mega cisterna magna, cardiovascular malformations and epilepsy. FLNA encodes an F-actin-binding cytoplasmic phosphoprotein and is involved in early brain neurogenesis and neuronal migration. A rare, recessive form of bilateral PNH with microcephaly and severe delay is associated with mutations of the ADP-ribosylation factor guanine nucleotide-exchange factor-2 (ARFGEF2) gene, required for vesicle and membrane trafficking from the trans-Golgi. However, PH is a heterogeneous disorder. We studied clinical and brain MRI of 182 patients with PH and, based on its anatomic distribution and associated birth defects, identified 15 subtypes. Classical bilateral PNH represented the largest group (98 patients: 54%). The 14 additional phenotypes (84 patients: 46%) included PNH with Ehlers-Danlos syndrome (EDS), temporo-occipital PNH with hippocampal malformation and cerebellar hypoplasia, PNH with fronto-perisylvian or temporo-occipital polymicrogyria, posterior PNH with hydrocephalus, PNH with microcephaly, PNH with frontonasal dysplasia, PNH with limb abnormalities, PNH with fragile-X syndrome, PNH with ambiguous genitalia, micronodular PH, unilateral PNH, laminar ribbon-like and linear PH. We performed mutation analysis of FLNA in 120 patients, of whom 72 (60%) had classical bilateral PNH and 48 (40%) other PH phenotypes, and identified 25 mutations in 40 individuals. Sixteen mutations had not been reported previously. Mutations were found in 35 patients with classical bilateral PNH, in three with PNH with EDS and in two with unilateral PNH. Twenty one mutations were nonsense and frame-shift and four missense. The high prevalence of mutations causing protein truncations confirms that loss of function is the major cause of the disorder. FLNA mutations were found in 100% of familial cases with X-linked PNH (10 families: 8 with classical bilateral PNH, 1 with EDS and 1 with unilateral PH) and in 26% of sporadic patients with classical bilateral PNH. Overall, mutations occurred in 49% of individuals with classical bilateral PNH irrespective of their being familial or sporadic. However, the chances of finding a mutation were exceedingly gender biased with 93% of mutations occurring in females and 7% in males. The probability of finding FLNA mutations in other phenotypes was 4% but was limited to the minor variants of PNH with EDS and unilateral PNH. Statistical analysis considering all 42 mutations described so far identifies a hotspot region for PNH in the actin-binding domain (P < 0.05).
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Affiliation(s)
- E Parrini
- Research Institute, I.R.C.C.S, Stella Maris Foundation, University of Pisa, Italy
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Rack K, Rombout S, Sartenaer D, Vidrequin S, Destree A, Van Maldergem L, Gillerot Y. P9: Molecular cytogenetic mapping of an interstitial deletion of 10p in a patient with mild mental retardation, autistic features and facial dysmorphia. Eur J Med Genet 2005. [DOI: 10.1016/j.ejmg.2005.10.016] [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: 11/24/2022]
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Cantagrel V, Lossi AM, Boulanger S, Depetris D, Mattei MG, Gecz J, Schwartz CE, Van Maldergem L, Villard L. Disruption of a new X linked gene highly expressed in brain in a family with two mentally retarded males. J Med Genet 2005; 41:736-42. [PMID: 15466006 PMCID: PMC1735597 DOI: 10.1136/jmg.2004.021626] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND Mental retardation (MR) affects 2-3% of the human population and some of these cases are genetically determined. Although several genes responsible for MR have been identified, many cases have still not been explained. METHODS We have identified a pericentric inversion of the X chromosome inv(X)(p22.3;q13.2) segregating in a family where two male carriers have severe MR while female carriers are not affected. RESULTS The molecular characterisation of this inversion led us to identify two new genes which are disrupted by the breakpoints: KIAA2022 in Xq13.2 and P2RY8 in Xp22.3. These genes were not previously fully characterised in humans. KIAA2022 encodes a protein which lacks significant homology to any other known protein and is highly expressed in the brain. P2RY8 is a member of the purine nucleotide G-protein coupled receptor gene family. It is located in the pseudo-autosomal region of the X chromosome and is not expressed in brain. CONCLUSIONS Because the haploinsufficiency of P2RY8 in carrier mothers does not have a phenotypic consequence, we propose that the severe MR of the affected males in this family is due to the absence of the KIAA2022 gene product. However, screening 20 probands from X linked MR families did not reveal mutations in KIAA2022. Nonetheless, the high expression of this gene in fetal brain and in the adult cerebral cortex could be consistent with a role in brain development and/or cognitive function.
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Affiliation(s)
- V Cantagrel
- Inserm U491, Faculté de Médecine de La Timone, 27, Bd. Jean Moulin, 13385 Marseille Cedex 5, France
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41
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Van Maldergem L, Siitonen HA, Jalkh N, Chouery E, De Roy M, Delague V, Muenke M, Jabs EW, Cai J, Wang LL, Plon SE, Fourneau C, Kestilä M, Gillerot Y, Mégarbané A, Verloes A. Revisiting the craniosynostosis-radial ray hypoplasia association: Baller-Gerold syndrome caused by mutations in the RECQL4 gene. J Med Genet 2005; 43:148-52. [PMID: 15964893 PMCID: PMC2564634 DOI: 10.1136/jmg.2005.031781] [Citation(s) in RCA: 164] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Baller-Gerold syndrome (BGS) is a rare autosomal recessive condition with radial aplasia/hypoplasia and craniosynostosis (OMIM 218600). Of >20 cases reported so far, a few appear atypical and have been reassigned to other nosologic entities, including Fanconi anaemia, Roberts SC phocomelia, and Pfeiffer syndromes after demonstration of corresponding cytogenetic or molecular abnormalities. Clinical overlap between BGS, Rothmund-Thomson syndrome (RTS), and RAPADILINO syndrome is noticeable. Because patients with RAPADILINO syndrome and a subset of patients with RTS have RECQL4 mutations, we reassessed two previously reported BGS families and found causal mutations in RECQL4 in both. In the first family, four affected offspring had craniosynostosis and radial defect and one of them developed poikiloderma. In this family, compound heterozygosity for a R1021W missense mutation and a g.2886delT frameshift mutation of exon 9 was found. In the second family, the affected male had craniosynostosis, radial ray defect, poikiloderma, and short stature. He had a homozygous splice site mutation (IVS17-2A>C). In both families, the affected offspring had craniosynostosis, radial defects, and growth retardation, and two developed poikiloderma. Our results confirm that BGS in a subgroup of patients is due to RECQL4 mutations and could be integrated into a clinical spectrum that encompasses RTS and RAPADILINO syndrome.
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Affiliation(s)
- L Van Maldergem
- Centre de Génétique Humaine, Institut de Pathologie et de Génétique, Loverval, Belgium.
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42
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Janssens K, Vanhoenacker F, Bonduelle M, Verbruggen L, Van Maldergem L, Ralston S, Guañabens N, Migone N, Wientroub S, Divizia MT, Bergmann C, Bennett C, Simsek S, Melançon S, Cundy T, Van Hul W. Camurati-Engelmann disease: review of the clinical, radiological, and molecular data of 24 families and implications for diagnosis and treatment. J Med Genet 2005; 43:1-11. [PMID: 15894597 PMCID: PMC2564495 DOI: 10.1136/jmg.2005.033522] [Citation(s) in RCA: 176] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Camurati-Engelmann disease (CED) is a rare autosomal dominant type of bone dysplasia. This review is based on the unpublished and detailed clinical, radiological, and molecular findings in 14 CED families, comprising 41 patients, combined with data from 10 other previously reported CED families. For all 100 cases, molecular evidence for CED was available, as a mutation was detected in TGFB1, the gene encoding transforming growth factor (TGF) beta1. Pain in the extremities was the most common clinical symptom, present in 68% of the patients. A waddling gait (48%), easy fatigability (44%), and muscle weakness (39%) were other important features. Radiological symptoms were not fully penetrant, with 94% of the patients showing the typical long bone involvement. A large percentage of the patients also showed involvement of the skull (54%) and pelvis (63%). The review provides an overview of possible treatments, diagnostic guidelines, and considerations for prenatal testing. The detailed description of such a large set of CED patients will be of value in establishing the correct diagnosis, genetic counselling, and treatment.
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Affiliation(s)
- K Janssens
- Department of Medical Genetics, University of Antwerp, Antwerp, Belgium
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43
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Van Maldergem L, Moser AB, Vincent MF, Roland D, Reding R, Otte JB, Wanders RJ, Sokal E. Orthotopic liver transplantation from a living-related donor in an infant with a peroxisome biogenesis defect of the infantile Refsum disease type. J Inherit Metab Dis 2005; 28:593-600. [PMID: 15902563 DOI: 10.1007/s10545-005-0593-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2004] [Accepted: 01/11/2005] [Indexed: 10/25/2022]
Abstract
Peroxisomal biogenesis defects include a number of severe neurodevelopmental disorders, among which infantile Refsum disease (IRD) occupies the mildest end of the spectrum. Although high docosahexaenoic acid (DHA) and low phytanic acid diets can correct some of the biochemical defects, they have not consistently altered the progressive course of the disease. We carried out orthotopic liver transplantation (OLT) in a mildly symptomatic 6-month-old infant who was a sibling of a severely neurologically impaired older sister. After transplantation the clinical course of this young child appeared much improved by comparison to her older sister. She walked alone at 4 years, had acceptable social interaction and had a noticeable recovery of audition. After transplantation her biochemical parameters were significantly improved: phytanic acid and very long-chain fatty acid (VLCFA) serum concentrations decreased. Abnormal bile acids disappeared from plasma. Although the OLT did not result in a cure of the disorder, the clinical and biochemical results suggest that OLT should be considered in mildly symptomatic patients.
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Affiliation(s)
- L Van Maldergem
- Centre de Génétique Humaine, Institut de Pathologie et de Génétique, Loverval, Belgium.
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44
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Dehout F, Roland D, Treille de Granseigne S, Guillaume B, Van Maldergem L. Relief of gastrointestinal symptoms under enzyme replacement therapy [corrected] in patients with Fabry disease. J Inherit Metab Dis 2004; 27:499-505. [PMID: 15303007 DOI: 10.1023/b:boli.0000037342.59612.69] [Citation(s) in RCA: 51] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Gastrointestinal symptoms, including diarrhoea and abdominal pain, are one of the earliest and most frequently reported signs of Fabry disease, a rare X-linked lipid storage disorder. As the disease progresses, renal, cardiac and cerebrovascular complications develop, resulting in more serious symptoms and early mortality. The present study evaluated the effects of enzyme replacement therapy (ERT) with agalsidase alfa on the gastrointestinal symptoms of Fabry disease. Following 6 months of treatment, both the severity ( p < 0.02) and frequency ( p < 0.02) of abdominal pain decreased. For those patients who had received agalsidase alfa for more than 6 months, the observed improvement was generally maintained. This is the first study indicating a significant beneficial effect of ERT on gastrointestinal symptoms in a group of patients treated for Fabry disease.
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Affiliation(s)
- F Dehout
- Department of Nephrology, CHU, Intercommunale de Santé Publique du Pays de Charleroi, Charleroi, Belgium.
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45
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Shaw MA, Brunetti-Pierri N, Kádasi L, Kovácová V, Van Maldergem L, De Brasi D, Salerno M, Gécz J. Identification of three novel SEDL mutations, including mutation in the rare, non-canonical splice site of exon 4. Clin Genet 2003; 64:235-42. [PMID: 12919139 DOI: 10.1034/j.1399-0004.2003.00132.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Spondyloepiphyseal dysplasia tarda (SEDT) is an X-linked recessive disorder, characterized by disproportionately short stature and degenerative joint disease, which manifests in the early teens. The gene responsible for SED tarda, SEDL, has been identified in Xp22. We report on three novel SEDL mutations. The first mutation is in the rare, non-canonical 5' splice site of intron 4 (IVS4+4T>C) in an Italian family. Reverse transcription-polymerase chain reaction (RT-PCR) analysis has revealed that this mutation causes alternative splicing of exon 5, and, as a consequence, inclusion of exon 4b sequence. This gives rise to an altered, truncated SEDL protein. We also describe two new deletions: one is a 4-bp deletion in exon 6 [333-336del(GAAT)], identified in a Slovak patient with SEDT, and one is a 1.335-kb deletion (in5/ex6del), found in a Belgian patient. The identification of these novel mutations in SEDL adds to the spectrum of 30 mutations previously identified. A short summary of all currently known SEDL gene mutations is presented.
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Affiliation(s)
- M A Shaw
- Department of Cytogenetics and Molecular Genetics, Women's and Children's Hospital, Adelaide, SA, Australia
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46
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Van Maldergem L, Magré J, Khallouf TE, Gedde-Dahl T, Delépine M, Trygstad O, Seemanova E, Stephenson T, Albott CS, Bonnici F, Panz VR, Medina JL, Bogalho P, Huet F, Savasta S, Verloes A, Robert JJ, Loret H, De Kerdanet M, Tubiana-Rufi N, Mégarbané A, Maassen J, Polak M, Lacombe D, Kahn CR, Silveira EL, D'Abronzo FH, Grigorescu F, Lathrop M, Capeau J, O'Rahilly S. Genotype-phenotype relationships in Berardinelli-Seip congenital lipodystrophy. J Med Genet 2002; 39:722-33. [PMID: 12362029 PMCID: PMC1734991 DOI: 10.1136/jmg.39.10.722] [Citation(s) in RCA: 206] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Generalised lipodystrophy of the Berardinelli-Seip type (BSCL) is a rare autosomal recessive human disorder with severe adverse metabolic consequences. A gene on chromosome 9 (BSCL1) has recently been identified, predominantly in African-American families. More recently, mutations in a previously undescribed gene of unknown function (BSCL2) on chromosome 11, termed seipin, have been found to be responsible for this disorder in a number of European and Middle Eastern families. We have studied the genotype/phenotype relationships in 70 affected subjects from 44 apparently unrelated pedigrees of diverse ethnic origin. In all subjects, hepatic dysfunction, hyperlipidaemia, diabetes mellitus, and hypertrophic cardiomyopathy were significant contributors to morbidity with no clear differences in their prevalence between subjects with BSCL1 or BSCL2 and those with evidence against cosegregation with either chromosome 9 or 11 (designated BSCLX). BSCL2 appears to be a more severe disorder than BSCL1 with a higher incidence of premature death and a lower prevalence of partial and/or delayed onset of lipodystrophy. Notably, subjects with BSCL2 had a significantly higher prevalence of intellectual impairment than those with BSCL1 or BSCLX (p<0.0001, OR 17.0, CI 3.6 to 79.0). The higher prevalence of intellectual impairment and the increased risk of premature death in BSCL2 compared to BSCL1 emphasise the importance of molecular diagnosis of this syndrome and have clear implications for genetic counselling.
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Affiliation(s)
- L Van Maldergem
- Centre de Génétique Humaine, Institut de Pathologie et de Génétique, Loverval, Belgium.
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47
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Andries S, Sartenaer D, Rack K, Rombout S, Tuerlinckx D, Gillerot Y, Van Maldergem L. Pure terminal duplication of the short arm of chromosome 19 in a boy with mild microcephaly. J Med Genet 2002; 39:E60. [PMID: 12362042 PMCID: PMC1734980 DOI: 10.1136/jmg.39.10.e60] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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48
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De Koning TJ, Duran M, Van Maldergem L, Pineda M, Dorland L, Gooskens R, Jaeken J, Poll-The BT. Congenital microcephaly and seizures due to 3-phosphoglycerate dehydrogenase deficiency: outcome of treatment with amino acids. J Inherit Metab Dis 2002; 25:119-25. [PMID: 12118526 DOI: 10.1023/a:1015624726822] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Congenital microcephaly, intractable seizures and severe psychomotor retardation characterize 3-phosphoglycerate dehydrogenase (3-PGDH) deficiency, a disorder of L-serine biosynthesis. The enzyme defect results in low concentrations of serine and to a variable degree of glycine in plasma and cerebrospinal fluid. Short-term beneficial effects have been reported of oral treatment with the deficient amino acids. In this paper, we report the first follow-up data of amino acid therapy in five patients treated for 3-7.5 years. Different treatment regimes were used, but a favourable response to amino acids was observed in all patients. A major reduction in seizure frequency occurred in all patients; two patients became free of seizures. Amino acids were well tolerated and no adverse effects were documented. A progress of psychomotor development was only observed in one patient, diagnosed early and treated with a high dosage of L-serine. A favourable outcome of 3-PGDH deficiency depends on early diagnosis and treatment.
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Affiliation(s)
- T J De Koning
- Department of Metabolic Diseases, University Medical Center Utrecht, The Netherlands.
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49
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Grohmann K, Schuelke M, Diers A, Hoffmann K, Lucke B, Adams C, Bertini E, Leonhardt-Horti H, Muntoni F, Ouvrier R, Pfeufer A, Rossi R, Van Maldergem L, Wilmshurst JM, Wienker TF, Sendtner M, Rudnik-Schöneborn S, Zerres K, Hübner C. Mutations in the gene encoding immunoglobulin mu-binding protein 2 cause spinal muscular atrophy with respiratory distress type 1. Nat Genet 2001; 29:75-7. [PMID: 11528396 DOI: 10.1038/ng703] [Citation(s) in RCA: 223] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Classic spinal muscular atrophy (SMA) is caused by mutations in the telomeric copy of SMN1. Its product is involved in various cellular processes, including cytoplasmic assembly of spliceosomal small nuclear ribonucleoproteins, pre-mRNA processing and activation of transcription. Spinal muscular atrophy with respiratory distress (SMARD) is clinically and genetically distinct from SMA. Here we demonstrate that SMARD type 1 (SMARD1) results from mutations in the gene encoding immunoglobulin micro-binding protein 2 (IGHMBP2; on chromosome 11q13.2-q13.4). In six SMARD1 families, we detected three recessive missense mutations (exons 5, 11 and 12), two nonsense mutations (exons 2 and 5), one frameshift deletion (exon 5) and one splice donor-site mutation (intron 13). Mutations in mouse Ighmbp2 (ref. 14) have been shown to be responsible for spinal muscular atrophy in the neuromuscular degeneration (nmd) mouse, whose phenotype resembles the SMARD1 phenotype. Like the SMN1 product, IGHMBP2 colocalizes with the RNA-processing machinery in both the cytoplasm and the nucleus. Our results show that IGHMBP2 is the second gene found to be defective in spinal muscular atrophy, and indicate that IGHMBP2 and SMN share common functions important for motor neuron maintenance and integrity in mammals.
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Affiliation(s)
- K Grohmann
- Department of Neuropediatrics, Charité, Campus Virchow-Klinikum, Humboldt University, 13353 Berlin, Germany
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50
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Magré J, Delépine M, Khallouf E, Gedde-Dahl T, Van Maldergem L, Sobel E, Papp J, Meier M, Mégarbané A, Bachy A, Verloes A, d'Abronzo FH, Seemanova E, Assan R, Baudic N, Bourut C, Czernichow P, Huet F, Grigorescu F, de Kerdanet M, Lacombe D, Labrune P, Lanza M, Loret H, Matsuda F, Navarro J, Nivelon-Chevalier A, Polak M, Robert JJ, Tric P, Tubiana-Rufi N, Vigouroux C, Weissenbach J, Savasta S, Maassen JA, Trygstad O, Bogalho P, Freitas P, Medina JL, Bonnicci F, Joffe BI, Loyson G, Panz VR, Raal FJ, O'Rahilly S, Stephenson T, Kahn CR, Lathrop M, Capeau J. Identification of the gene altered in Berardinelli-Seip congenital lipodystrophy on chromosome 11q13. Nat Genet 2001; 28:365-70. [PMID: 11479539 DOI: 10.1038/ng585] [Citation(s) in RCA: 490] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Congenital generalized lipodystrophy, or Berardinelli-Seip syndrome (BSCL), is a rare autosomal recessive disease characterized by a near-absence of adipose tissue from birth or early infancy and severe insulin resistance. Other clinical and biological features include acanthosis nigricans, hyperandrogenism, muscular hypertrophy, hepatomegaly, altered glucose tolerance or diabetes mellitus, and hypertriglyceridemia. A locus (BSCL1) has been mapped to 9q34 with evidence of heterogeneity. Here, we report a genome screen of nine BSCL families from two geographical clusters (in Lebanon and Norway). We identified a new disease locus, designated BSCL2, within the 2.5-Mb interval flanked by markers D11S4076 and D11S480 on chromosome 11q13. Analysis of 20 additional families of various ethnic origins led to the identification of 11 families in which the disease cosegregates with the 11q13 locus; the remaining families provide confirmation of linkage to 9q34. Sequence analysis of genes located in the 11q13 interval disclosed mutations in a gene homologous to the murine guanine nucleotide-binding protein (G protein), gamma3-linked gene (Gng3lg) in all BSCL2-linked families. BSCL2 is most highly expressed in brain and testis and encodes a protein (which we have called seipin) of unknown function. Most of the variants are null mutations and probably result in a severe disruption of the protein. These findings are of general importance for understanding the molecular mechanisms underlying regulation of body fat distribution and insulin resistance.
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Affiliation(s)
- J Magré
- INSERM U.402, Faculté de Médecine Saint-Antoine, Université Pierre et Marie Curie, 27 rue Chaligny, 75012 Paris, France.
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