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6 results on '"Tüysüz, Beyhan"'

1. Mutations in the Gene Encoding IFT Dynein Complex Component WDR34 Cause Jeune Asphyxiating Thoracic Dystrophy

Author

Schmidts, Miriam, Vodopiutz, Julia, Christou-Savina, Sonia, Cortés, Claudio R, McInerney-Leo, Aideen M, Emes, Richard D, Arts, Heleen H, Tüysüz, Beyhan, D’Silva, Jason, Leo, Paul J, Giles, Tom C, Oud, Machteld M, Harris, Jessica A, Koopmans, Marije, Marshall, Mhairi, Elçioglu, Nursel, Kuechler, Alma, Bockenhauer, Detlef, Moore, Anthony T, Wilson, Louise C, Janecke, Andreas R, Hurles, Matthew E, Emmet, Warren, Gardiner, Brooke, Streubel, Berthold, Dopita, Belinda, Zankl, Andreas, Kayserili, Hülya, Scambler, Peter J, Brown, Matthew A, Beales, Philip L, Wicking, Carol, UK10K, Duncan, Emma L, and Mitchison, Hannah M

Subjects
Rare Diseases, Pediatric, Underpinning research, 1.1 Normal biological development and functioning, Generic health relevance, Animals, Asians, Axoneme, Carrier Proteins, Child, Chlamydomonas, Cilia, Cytoplasmic Dyneins, Cytoskeleton, Ellis-Van Creveld Syndrome, Exome, Exons, Humans, Infant, Infant, Newborn, Intracellular Signaling Peptides and Proteins, Mutation, Protein Conformation, Proteomics, Whites, UK10K, Asian People, White People, Biological Sciences, Medical and Health Sciences, Genetics & Heredity
Abstract

Bidirectional (anterograde and retrograde) motor-based intraflagellar transport (IFT) governs cargo transport and delivery processes that are essential for primary cilia growth and maintenance and for hedgehog signaling functions. The IFT dynein-2 motor complex that regulates ciliary retrograde protein transport contains a heavy chain dynein ATPase/motor subunit, DYNC2H1, along with other less well functionally defined subunits. Deficiency of IFT proteins, including DYNC2H1, underlies a spectrum of skeletal ciliopathies. Here, by using exome sequencing and a targeted next-generation sequencing panel, we identified a total of 11 mutations in WDR34 in 9 families with the clinical diagnosis of Jeune syndrome (asphyxiating thoracic dystrophy). WDR34 encodes a WD40 repeat-containing protein orthologous to Chlamydomonas FAP133, a dynein intermediate chain associated with the retrograde intraflagellar transport motor. Three-dimensional protein modeling suggests that the identified mutations all affect residues critical for WDR34 protein-protein interactions. We find that WDR34 concentrates around the centrioles and basal bodies in mammalian cells, also showing axonemal staining. WDR34 coimmunoprecipitates with the dynein-1 light chain DYNLL1 in vitro, and mining of proteomics data suggests that WDR34 could represent a previously unrecognized link between the cytoplasmic dynein-1 and IFT dynein-2 motors. Together, these data show that WDR34 is critical for ciliary functions essential to normal development and survival, most probably as a previously unrecognized component of the mammalian dynein-IFT machinery.

Published
2013

4. SLC10A7 mutations cause a skeletal dysplasia with amelogenesis imperfecta mediated by GAG biosynthesis defects

Author

Dubail, Johanne, Huber, Céline, Chantepie, Sandrine, Sonntag, Stephan, Tüysüz, Beyhan, Mihci, Ercan, Gordon, Christopher T., Steichen-Gersdorf, Elisabeth, Amiel, Jeanne, Nur, Banu, Stolte-Dijkstra, Irene, van Eerde, Albertien M., van Gassen, Koen L., Breugem, Corstiaan C., Stegmann, Alexander, Lekszas, Caroline, Maroofian, Reza, Karimiani, Ehsan Ghayoor, Bruneel, Arnaud, Seta, Nathalie, Munnich, Arnold, Papy-Garcia, Dulce, De La Dure-Molla, Muriel, Cormier-Daire, Valérie, ARD - Amsterdam Reproduction and Development, Imagine - Institut des maladies génétiques (IMAGINE - U1163), Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Paris Descartes - Paris 5 (UPD5), Université Sorbonne Paris Cité (USPC), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), CHU Necker - Enfants Malades [AP-HP], Croissance cellulaire, réparation et régénération tissulaires (CRRET), Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS), PolyGene AG [Rümlang, Switzerland], Department of Pediatric Genetics [Istanbul, Turkey] (Cerrahpasa Medicine School), Istanbul University, Paediatric Genetic Department [Antalya, Turkey], Akdeniz University, Innsbruck Medical University [Austria] (IMU), University Medical Center Groningen [Groningen] (UMCG), University Medical Center [Utrecht], Division of Paediatric Plastic Surgery [Utrecht, The Netherlands], Wilhelmina Children´s Hopsital [Utrecht, The Netherlands], Maastricht University Medical Centre (MUMC), Maastricht University [Maastricht], Radboud University Medical Center [Nijmegen], Julius-Maximilians-Universität Würzburg [Wurtzbourg, Allemagne] (JMU), Molecular and Clinical Sciences Institute - St George’s [London, UK] (Genetics Research Centre), University of London [London], Next Generation Genetic Clinic [Mashhad, Iran], Razavi Cancer Research Center [Mashhad, Iran] (Razavi Hospital), Imam Reza International University [Mashhad, Iran], CIC Hôpital Bichat, Institut National de la Santé et de la Recherche Médicale (INSERM)-UFR de Médecine-AP-HP - Hôpital Bichat - Claude Bernard [Paris], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Centre de Recherche des Cordeliers (CRC (UMR_S_1138 / U1138)), École pratique des hautes études (EPHE), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU), Sorbonne Université - Faculté de Médecine (SU FM), Sorbonne Université (SU), This work was supported by the European Community’s Seventh Framework Programme (FP7/2007-2013) under grant agreement number 602300 (SYBIL) and the Fondation pour la Recherche Médicale (FRM) funding (DEQ20120323703)., European Project: 602300,EC:FP7:HEALTH,FP7-HEALTH-2013-INNOVATION-1,SYBIL(2013), Gestionnaire, Hal Sorbonne Université, Systems biology for the functional validation of genetic determinants of skeletal diseases - SYBIL - - EC:FP7:HEALTH2013-10-01 - 2018-09-30 - 602300 - VALID, Innsbruck Medical University = Medizinische Universität Innsbruck (IMU), Julius-Maximilians-Universität Würzburg (JMU), AP-HP - Hôpital Bichat - Claude Bernard [Paris], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-UFR de Médecine, MUMC+: DA KG Lab Centraal Lab (9), MUMC+: DA Pat Cytologie (9), RS: GROW - R4 - Reproductive and Perinatal Medicine, Wilhelmina Children’s Hospital, and École Pratique des Hautes Études (EPHE)

Subjects
Electrophoresis, Chemistry(all), Amelogenesis Imperfecta, DISORDERS, PROTEINS, Science, GROWTH-PLATE, [SDV]Life Sciences [q-bio], Organic Anion Transporters, Sodium-Dependent, HEPARAN-SULFATE PROTEOGLYCANS, PHENOTYPES, Physics and Astronomy(all), Osteochondrodysplasias, Article, CALCIUM, Mice, Chlorocebus aethiops, Animals, Humans, Exome, Child, lcsh:Science, Glycoproteins, GLYCOSAMINOGLYCANS, Mice, Knockout, Bone Diseases, Developmental, Symporters, Biochemistry, Genetics and Molecular Biology(all), Body Weight, CHONDROITIN, Infant, GENE, [SDV] Life Sciences [q-bio], Disease Models, Animal, HEK293 Cells, Child, Preschool, COS Cells, Mutation, lcsh:Q, REGULATOR
Abstract

Skeletal dysplasia with multiple dislocations are severe disorders characterized by dislocations of large joints and short stature. The majority of them have been linked to pathogenic variants in genes encoding glycosyltransferases, sulfotransferases or epimerases required for glycosaminoglycan synthesis. Using exome sequencing, we identify homozygous mutations in SLC10A7 in six individuals with skeletal dysplasia with multiple dislocations and amelogenesis imperfecta. SLC10A7 encodes a 10-transmembrane-domain transporter located at the plasma membrane. Functional studies in vitro demonstrate that SLC10A7 mutations reduce SLC10A7 protein expression. We generate a Slc10a7−/− mouse model, which displays shortened long bones, growth plate disorganization and tooth enamel anomalies, recapitulating the human phenotype. Furthermore, we identify decreased heparan sulfate levels in Slc10a7−/− mouse cartilage and patient fibroblasts. Finally, we find an abnormal N-glycoprotein electrophoretic profile in patient blood samples. Together, our findings support the involvement of SLC10A7 in glycosaminoglycan synthesis and specifically in skeletal development., The majority of skeletal dysplasia are caused by pathogenic variants in genes required for glycosaminoglycan (GAG) metabolism. Here, Dubail et al. identify genetic variants in the solute carrier family protein SLC10A7 in families with skeletal dysplasia and amelogenesis imperfecta that disrupt GAG synthesis.

Published
2018
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5. Neurofibromatosis Type 1 in Children: A Single-Center Experience.

Author

Kaçar, Ayşe Gonca, Oktay, Burcu Kılınc, Özel, Simge Çınar, Ocak, Süheyla, Güneş, Nilay, Alkaya, Dilek Uludağ, Tüysüz, Beyhan, Apak, Hilmi, and Celkan, Tülin Tiraje

Subjects
GLIOMAS, RETROSPECTIVE studies, NEUROFIBROMA, DESCRIPTIVE statistics, NEUROFIBROMATOSIS 1, HUMAN skin color, MELANOSIS, SYMPTOMS
Abstract

Objective: Neurofibromatosis (NF) is the most common autosomal dominantly inherited neurocutaneous syndrome. The characteristic features of NF type 1 (NF-1) are café au lait spots, axillary and inguinal freckling, peripheral neurofibromas, optic pathway glioma, and Lisch nodules. The present study aimed to analyze the clinical features of children with NF-1. Materials and Methods: In this study, the children with NF-1 diagnosed and followed-up in our center between 2000 and 2020 were retrospectively evaluated. Demographic and clinical features of patients were defined. Results: The study group consisted of 52 patients. Of those, 25 were boys and 27 were girls. The children's median age at diagnosis was 5.9 years (1-15.8). Café au lait (CAL) spots and axillary/ inguinal freckling were observed in 50 and 24 patients, respectively. Neurofibroma was present in 22 cases. Ten of the cohort had optic gliomas, and 39 of them had cranial hamartomas. Orthopedic complications such as scoliosis, tibial pseudoarthrosis, and osteoporosis were observed in 13 patients. Eleven children had neurocognitive disorders. Conclusions: Early diagnosis is important in neurofibromatosis to prevent the complications of the disease. Also, neurological development and secondary malignancy follow-up should be done carefully in this group of patients. [ABSTRACT FROM AUTHOR]

Published
2021
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6. Mutations in the Gene Encoding IFT Dynein Complex Component WDR34 Cause Jeune Asphyxiating Thoracic Dystrophy

Author

Schmidts, Miriam, Vodopiutz, Julia, Christou-Savina, Sonia, Cortés, Claudio R., McInerney-Leo, Aideen M., Emes, Richard D., Arts, Heleen H., Tüysüz, Beyhan, D’Silva, Jason, Leo, Paul J., Giles, Tom C., Oud, Machteld M., Harris, Jessica A., Koopmans, Marije, Marshall, Mhairi, Elçioglu, Nursel, Kuechler, Alma, Bockenhauer, Detlef, Moore, Anthony T., Wilson, Louise C., Janecke, Andreas R., Hurles, Matthew E., Emmet, Warren, Gardiner, Brooke, Streubel, Berthold, Dopita, Belinda, Zankl, Andreas, Kayserili, Hülya, Scambler, Peter J., Brown, Matthew A., Beales, Philip L., Wicking, Carol, Duncan, Emma L., and Mitchison, Hannah M.

Subjects
Cytoplasmic Dyneins, Proteomics, Axoneme, Ellis-Van Creveld Syndrome, Protein Conformation, Chlamydomonas, Infant, Newborn, Intracellular Signaling Peptides and Proteins, Medizin, Infant, Exons, White People, Asian People, Report, Mutation, Genetics, Animals, Humans, Exome, Genetics(clinical), Cilia, sense organs, Carrier Proteins, Child, Cytoskeleton
Abstract

Bidirectional (anterograde and retrograde) motor-based intraflagellar transport (IFT) governs cargo transport and delivery processes that are essential for primary cilia growth and maintenance and for hedgehog signaling functions. The IFT dynein-2 motor complex that regulates ciliary retrograde protein transport contains a heavy chain dynein ATPase/motor subunit, DYNC2H1, along with other less well functionally defined subunits. Deficiency of IFT proteins, including DYNC2H1, underlies a spectrum of skeletal ciliopathies. Here, by using exome sequencing and a targeted next-generation sequencing panel, we identified a total of 11 mutations in WDR34 in 9 families with the clinical diagnosis of Jeune syndrome (asphyxiating thoracic dystrophy). WDR34 encodes a WD40 repeat-containing protein orthologous to Chlamydomonas FAP133, a dynein intermediate chain associated with the retrograde intraflagellar transport motor. Three-dimensional protein modeling suggests that the identified mutations all affect residues critical for WDR34 protein-protein interactions. We find that WDR34 concentrates around the centrioles and basal bodies in mammalian cells, also showing axonemal staining. WDR34 coimmunoprecipitates with the dynein-1 light chain DYNLL1 in vitro, and mining of proteomics data suggests that WDR34 could represent a previously unrecognized link between the cytoplasmic dynein-1 and IFT dynein-2 motors. Together, these data show that WDR34 is critical for ciliary functions essential to normal development and survival, most probably as a previously unrecognized component of the mammalian dynein-IFT machinery. © 2013 by The American Society of Human Genetics. All rights reserved.

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