1
|
Koparir A, Lekszas C, Keseroglu K, Rose T, Rappl L, Rad A, Maroofian R, Narendran N, Hasanzadeh A, Karimiani EG, Boschann F, Kornak U, Klopocki E, Özbudak EM, Vona B, Haaf T, Liedtke D. Zebrafish as a model to investigate a biallelic gain-of-function variant in MSGN1, associated with a novel skeletal dysplasia syndrome. Hum Genomics 2024; 18:23. [PMID: 38448978 PMCID: PMC10916241 DOI: 10.1186/s40246-024-00593-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2024] [Accepted: 02/29/2024] [Indexed: 03/08/2024] Open
Abstract
BACKGROUND/OBJECTIVES Rare genetic disorders causing specific congenital developmental abnormalities often manifest in single families. Investigation of disease-causing molecular features are most times lacking, although these investigations may open novel therapeutic options for patients. In this study, we aimed to identify the genetic cause in an Iranian patient with severe skeletal dysplasia and to model its molecular function in zebrafish embryos. RESULTS The proband displays short stature and multiple skeletal abnormalities, including mesomelic dysplasia of the arms with complete humero-radio-ulna synostosis, arched clavicles, pelvic dysplasia, short and thin fibulae, proportionally short vertebrae, hyperlordosis and mild kyphosis. Exome sequencing of the patient revealed a novel homozygous c.374G > T, p.(Arg125Leu) missense variant in MSGN1 (NM_001105569). MSGN1, a basic-Helix-Loop-Helix transcription factor, plays a crucial role in formation of presomitic mesoderm progenitor cells/mesodermal stem cells during early developmental processes in vertebrates. Initial in vitro experiments show protein stability and correct intracellular localization of the novel variant in the nucleus and imply retained transcription factor function. To test the pathogenicity of the detected variant, we overexpressed wild-type and mutant msgn1 mRNA in zebrafish embryos and analyzed tbxta (T/brachyury/ntl). Overexpression of wild-type or mutant msgn1 mRNA significantly reduces tbxta expression in the tailbud compared to control embryos. Mutant msgn1 mRNA injected embryos depict a more severe effect, implying a gain-of-function mechanism. In vivo analysis on embryonic development was performed by clonal msgn1 overexpression in zebrafish embryos further demonstrated altered cell compartments in the presomitic mesoderm, notochord and pectoral fin buds. Detection of ectopic tbx6 and bmp2 expression in these embryos hint to affected downstream signals due to Msgn1 gain-of-function. CONCLUSION In contrast to loss-of-function effects described in animal knockdown models, gain-of-function of MSGN1 explains the only mildly affected axial skeleton of the proband and rather normal vertebrae. In this context we observed notochord bending and potentially disruption of pectoral fin buds/upper extremity after overexpression of msgn1 in zebrafish embryos. The latter might result from Msgn1 function on mesenchymal stem cells or on chondrogenesis in these regions. In addition, we detected ectopic tbx6 and bmp2a expression after gain of Msgn1 function in zebrafish, which are interconnected to short stature, congenital scoliosis, limb shortening and prominent skeletal malformations in patients. Our findings highlight a rare, so far undescribed skeletal dysplasia syndrome associated with a gain-of-function mutation in MSGN1 and hint to its molecular downstream effectors.
Collapse
Affiliation(s)
- Asuman Koparir
- Institute of Human Genetics, Julius-Maximilians-Universität Würzburg, Biozentrum, Am Hubland, 97074, Würzburg, Germany
| | - Caroline Lekszas
- Institute of Human Genetics, Julius-Maximilians-Universität Würzburg, Biozentrum, Am Hubland, 97074, Würzburg, Germany
| | - Kemal Keseroglu
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Thalia Rose
- Institute of Human Genetics, Julius-Maximilians-Universität Würzburg, Biozentrum, Am Hubland, 97074, Würzburg, Germany
| | - Lena Rappl
- Institute of Human Genetics, Julius-Maximilians-Universität Würzburg, Biozentrum, Am Hubland, 97074, Würzburg, Germany
| | - Aboulfazl Rad
- Cellular and Molecular Research Centre, Sabzevar University of Medical Sciences, Sabzevar, Iran
| | - Reza Maroofian
- Department of Neuromuscular Disorders, UCL Queen Square Institute of Neurology, London, WC1N 3BG, UK
| | - Nakul Narendran
- University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Atefeh Hasanzadeh
- Cellular and Molecular Research Centre, Sabzevar University of Medical Sciences, Sabzevar, 009851, Iran
| | | | - Felix Boschann
- Institute for Medical Genetics and Human Genetics, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität Zu Berlin, Berlin, Germany
- Berlin Institute of Health at Charité - Universitätsmedizin Berlin, Berlin, Germany
| | - Uwe Kornak
- Institute for Medical Genetics and Human Genetics, Charité - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität Zu Berlin, Berlin, Germany
- Institute of Human Genetics, University Medical Center Göttingen, Göttingen, Germany
| | - Eva Klopocki
- Institute of Human Genetics, Julius-Maximilians-Universität Würzburg, Biozentrum, Am Hubland, 97074, Würzburg, Germany
| | - Ertuğrul M Özbudak
- Division of Developmental Biology, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, OH, USA
| | - Barbara Vona
- Institute of Human Genetics, University Medical Center Göttingen, Göttingen, Germany
- Institute for Auditory Neuroscience and InnerEarLab, University Medical Center Göttingen, Göttingen, Germany
| | - Thomas Haaf
- Institute of Human Genetics, Julius-Maximilians-Universität Würzburg, Biozentrum, Am Hubland, 97074, Würzburg, Germany
| | - Daniel Liedtke
- Institute of Human Genetics, Julius-Maximilians-Universität Würzburg, Biozentrum, Am Hubland, 97074, Würzburg, Germany.
| |
Collapse
|
2
|
Villar-Quiles RN, Catervi F, Cabet E, Juntas-Morales R, Genetti CA, Gidaro T, Koparir A, Yüksel A, Coppens S, Deconinck N, Pierce-Hoffman E, Lornage X, Durigneux J, Laporte J, Rendu J, Romero NB, Beggs AH, Servais L, Cossée M, Olivé M, Böhm J, Duband-Goulet I, Ferreiro A. ASC-1 Is a Cell Cycle Regulator Associated with Severe and Mild Forms of Myopathy. Ann Neurol 2019; 87:217-232. [PMID: 31794073 DOI: 10.1002/ana.25660] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2019] [Revised: 12/02/2019] [Accepted: 12/02/2019] [Indexed: 12/12/2022]
Abstract
OBJECTIVE Recently, the ASC-1 complex has been identified as a mechanistic link between amyotrophic lateral sclerosis and spinal muscular atrophy (SMA), and 3 mutations of the ASC-1 gene TRIP4 have been associated with SMA or congenital myopathy. Our goal was to define ASC-1 neuromuscular function and the phenotypical spectrum associated with TRIP4 mutations. METHODS Clinical, molecular, histological, and magnetic resonance imaging studies were made in 5 families with 7 novel TRIP4 mutations. Fluorescence activated cell sorting and Western blot were performed in patient-derived fibroblasts and muscles and in Trip4 knocked-down C2C12 cells. RESULTS All mutations caused ASC-1 protein depletion. The clinical phenotype was purely myopathic, ranging from lethal neonatal to mild ambulatory adult patients. It included early onset axial and proximal weakness, scoliosis, rigid spine, dysmorphic facies, cutaneous involvement, respiratory failure, and in the older cases, dilated cardiomyopathy. Muscle biopsies showed multiminicores, nemaline rods, cytoplasmic bodies, caps, central nuclei, rimmed fibers, and/or mild endomysial fibrosis. ASC-1 depletion in C2C12 and in patient-derived fibroblasts and muscles caused accelerated proliferation, altered expression of cell cycle proteins, and/or shortening of the G0/G1 cell cycle phase leading to cell size reduction. INTERPRETATION Our results expand the phenotypical and molecular spectrum of TRIP4-associated disease to include mild adult forms with or without cardiomyopathy, associate ASC-1 depletion with isolated primary muscle involvement, and establish TRIP4 as a causative gene for several congenital muscle diseases, including nemaline, core, centronuclear, and cytoplasmic-body myopathies. They also identify ASC-1 as a novel cell cycle regulator with a key role in cell proliferation, and underline transcriptional coregulation defects as a novel pathophysiological mechanism. ANN NEUROL 2020;87:217-232.
Collapse
Affiliation(s)
- Rocío N Villar-Quiles
- Basic and Translational Myology Laboratory, UMR8251, University of Paris/National Center for Scientific Research, Paris, France.,Reference Center for Neuromuscular Disorders, Pitié-Salpêtrière Hospital, APHP, Institute of Myology, Paris, France
| | - Fabio Catervi
- Basic and Translational Myology Laboratory, UMR8251, University of Paris/National Center for Scientific Research, Paris, France
| | - Eva Cabet
- Basic and Translational Myology Laboratory, UMR8251, University of Paris/National Center for Scientific Research, Paris, France
| | - Raul Juntas-Morales
- Neuromuscular Unit, University Hospital Center Montpellier/EA7402 University of Montpellier, University Institute of Clinical Research, Montpellier, France
| | - Casie A Genetti
- Manton Center for Orphan Disease Research, Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA
| | | | - Asuman Koparir
- Department of Molecular Biology and Genetics, Biruni University, Istanbul, Turkey
| | - Adnan Yüksel
- Department of Molecular Biology and Genetics, Biruni University, Istanbul, Turkey
| | - Sandra Coppens
- Department of Pediatric Neurology, Reference Neuromuscular Center, Queen Fabiola Children's University Hospital, Free University of Brussels, Brussels, Belgium
| | - Nicolas Deconinck
- Department of Pediatric Neurology, Reference Neuromuscular Center, Queen Fabiola Children's University Hospital, Free University of Brussels, Brussels, Belgium
| | - Emma Pierce-Hoffman
- Center for Mendelian Genomics, Broad Institute of Massachusetts Institute of Technology and Harvard, Cambridge, MA
| | - Xavière Lornage
- Department of Translational Medicine and Neurogenetics, Institute of Genetics and Molecular and Cellular Biology, National Institute of Health and Medical Research U1258, National Center for Scientific Research UMR7104, University of Strasbourg, Illkirch, France
| | - Julien Durigneux
- Department of Neuropediatrics, University Hospital Center Angers, Neuromuscular Diseases Reference Center Antlantique Occitanie Caraïbe, Angers, France
| | - Jocelyn Laporte
- Department of Translational Medicine and Neurogenetics, Institute of Genetics and Molecular and Cellular Biology, National Institute of Health and Medical Research U1258, National Center for Scientific Research UMR7104, University of Strasbourg, Illkirch, France
| | - John Rendu
- Laboratory of Biochemistry and Molecular Genetics, University Hospital Center Grenoble, Grenoble, France
| | - Norma B Romero
- Reference Center for Neuromuscular Disorders, Pitié-Salpêtrière Hospital, APHP, Institute of Myology, Paris, France.,Neuromuscular Morphology Unit, Institute of Myology, Pitié-Salpêtrière Hospital, Paris, France
| | - Alan H Beggs
- Manton Center for Orphan Disease Research, Division of Genetics and Genomics, Boston Children's Hospital, Harvard Medical School, Boston, MA
| | - Laurent Servais
- I-Motion, Institute of Myology, APHP, Paris, France.,Division of Child Neurology, Neuromuscular Diseases Reference Center, Department of Pediatrics, Liège University Hospital and University of Liège, Liège, Belgium
| | - Mireille Cossée
- Molecular Genetics Laboratory, University Hospital Center Montpellier/National Institute of Health and Medical Research U827, University Institute of Clinical Research, Montpellier, France
| | - Montse Olivé
- Neuropathology Unit, Department of Pathology and Neuromuscular Unit, Institute of Biomedical Research of Bellvitge-University Hospital of Bellvitge, Barcelona, Spain
| | - Johann Böhm
- Department of Translational Medicine and Neurogenetics, Institute of Genetics and Molecular and Cellular Biology, National Institute of Health and Medical Research U1258, National Center for Scientific Research UMR7104, University of Strasbourg, Illkirch, France
| | - Isabelle Duband-Goulet
- Basic and Translational Myology Laboratory, UMR8251, University of Paris/National Center for Scientific Research, Paris, France
| | - Ana Ferreiro
- Basic and Translational Myology Laboratory, UMR8251, University of Paris/National Center for Scientific Research, Paris, France.,Reference Center for Neuromuscular Disorders, Pitié-Salpêtrière Hospital, APHP, Institute of Myology, Paris, France
| |
Collapse
|
3
|
Koparir A, Karatas OF, Yilmaz SS, Suer I, Ozer B, Yuceturk B, Ozen M. Revealing the functions of novel mutations in RAB3GAP1
in Martsolf and Warburg micro syndromes. Am J Med Genet A 2019; 179:579-587. [DOI: 10.1002/ajmg.a.61065] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2018] [Revised: 01/17/2019] [Accepted: 01/17/2019] [Indexed: 12/30/2022]
Affiliation(s)
- Asuman Koparir
- Department of Internal Medicine, Division of Medical Genetics; Istanbul University; Istanbul Turkey
| | - Omer Faruk Karatas
- Molecular Biology and Genetics Department; Erzurum Technical University; Erzurum Turkey
| | - Seda Salman Yilmaz
- Department of Medical Genetics; Istanbul University, Cerrahpasa Medical School; Istanbul Turkey
| | - Ilknur Suer
- Department of Internal Medicine, Division of Medical Genetics; Istanbul University; Istanbul Turkey
| | - Bugra Ozer
- Advanced Genomics and Bioinformatics Research Center; The Scientific and Technological Research Council of Turkey (TUBITAK-BILGEM); Kocaeli Turkey
| | - Betul Yuceturk
- Advanced Genomics and Bioinformatics Research Center; The Scientific and Technological Research Council of Turkey (TUBITAK-BILGEM); Kocaeli Turkey
| | - Mustafa Ozen
- Department of Medical Genetics; Istanbul University, Cerrahpasa Medical School; Istanbul Turkey
- Department of Pathology and Immunology; Baylor College of Medicine; Houston Texas
| |
Collapse
|
4
|
Duband-Goulet I, Catervi F, Cabet E, Davignon L, Genetti C, Gidaro T, Koparir A, Coppen S, Pierce-Hoffman E, Beggs A, Servais L, Ferreiro A. CONGENITAL MYOPATHIES: GENERAL AND RYR1. Neuromuscul Disord 2018. [DOI: 10.1016/j.nmd.2018.06.075] [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: 11/28/2022]
|
5
|
Lee B, Duz MB, Sagong B, Koparir A, Lee KY, Choi JY, Seven M, Yuksel A, Kim UK, Ozen M. Revealing the function of a novel splice-site mutation of CHD7 in CHARGE syndrome. Gene 2015; 576:776-81. [PMID: 26551301 DOI: 10.1016/j.gene.2015.11.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Revised: 09/24/2015] [Accepted: 11/04/2015] [Indexed: 11/27/2022]
Abstract
Most cases of CHARGE syndrome are sporadic and autosomal dominant. CHD7 is a major causative gene of CHARGE syndrome. In this study, we screened CHD7 in two Turkish patients demonstrating symptoms of CHARGE syndrome such as coloboma, heart defect, choanal atresia, retarded growth, genital abnomalities and ear anomalies. Two mutations of CHD7 were identified including a novel splice-site mutation (c.2443-2A>G) and a previously known frameshift mutation (c.2504_2508delATCTT). We performed exon trapping analysis to determine the effect of the c.2443-2A>G mutation at the transcriptional level, and found that it caused a complete skip of exon 7 and splicing at a cryptic splice acceptor site. Our current study is the second study demonstrating an exon 7 deficit in CHD7. Results of previous studies suggest that the c.2443-2A>G mutation affects the formation of nasal tissues and the neural retina during early development, resulting in choanal atresia and coloboma, respectively. The findings of the present study will improve our understanding of the genetic causes of CHARGE syndrome.
Collapse
Affiliation(s)
- Byeonghyeon Lee
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, South Korea; School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, South Korea
| | - Mehmet Bugrahan Duz
- Department of Medical Genetics, Istanbul University Cerrahpasa Medical School, Istanbul, Turkey
| | - Borum Sagong
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, South Korea; School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, South Korea
| | - Asuman Koparir
- Department of Medical Genetics, Istanbul University Cerrahpasa Medical School, Istanbul, Turkey
| | - Kyu-Yup Lee
- Department of Otorhinolaryngology-Head and Neck Surgery, School of Medicine, Kyungpook National University, Daegu, South Korea
| | - Jae Young Choi
- Department of Otorhinolaryngology, Yonsei University College of Medicine, Seoul, South Korea
| | - Mehmet Seven
- Department of Medical Genetics, Istanbul University Cerrahpasa Medical School, Istanbul, Turkey
| | - Adnan Yuksel
- Department of Medical Genetics, Biruni University Medical School, Istanbul, Turkey
| | - Un-Kyung Kim
- Department of Biology, College of Natural Sciences, Kyungpook National University, Daegu, South Korea; School of Life Sciences, BK21 Plus KNU Creative BioResearch Group, Kyungpook National University, Daegu, South Korea.
| | - Mustafa Ozen
- Department of Medical Genetics, Istanbul University Cerrahpasa Medical School, Istanbul, Turkey; Department of Medical Genetics, Biruni University Medical School, Istanbul, Turkey; Department of Pathology & Immunology, Baylor College of Medicine, Michael E. DeBakey VAMC, Houston, TX, United States.
| |
Collapse
|
6
|
Atik T, Koparir A, Bademci G, Foster J, Altunoglu U, Mutlu GY, Bowdin S, Elcioglu N, Tayfun GA, Atik SS, Ozen M, Ozkinay F, Alanay Y, Kayserili H, Thiel S, Tekin M. Novel MASP1 mutations are associated with an expanded phenotype in 3MC1 syndrome. Orphanet J Rare Dis 2015; 10:128. [PMID: 26419238 PMCID: PMC4589207 DOI: 10.1186/s13023-015-0345-3] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2015] [Accepted: 09/23/2015] [Indexed: 11/28/2022] Open
Abstract
Background 3MC1 syndrome is a rare autosomal recessive disorder characterized by intellectual disability, short stature and distinct craniofacial, umbilical, and sacral anomalies. Five mutations in MASP1, encoding lectin complement pathway enzymes MASP-1 and MASP-3, have thus far been reported to cause 3MC1 syndrome. Only one previously reported mutation affects both MASP-1 and MASP-3, while the other mutations affect only MASP-3. Methods We evaluated six unrelated individuals with 3MC1 syndrome and performed Sanger sequencing for all coding exons of MASP1. We also measured complement lectin and alternative pathway activities in an affected individual’s serum. Results We found two novel splice site mutations, c.1012-2A > G in one and c.891 + 1G > T in two probands, and three novel missense mutations, c.1451G > A (p.G484E), c.1657G > A (p.D553N), and c.1987G > T (p.D663Y). Missense mutations affect only MASP-3, while splice site mutations affect both MASP-1 and MASP-3. In a proband who is homozygous for c.891 + 1G > T, we detected a total lack of lectin complement pathway activity and a 2.5-fold lower alternative pathway activity. The phenotype observed in patients whose both MASP-1 and MASP-3 are affected and in those whose only MASP-3 is affected does not appear to be different. We observed structural brain abnormalities, neonatal tooth, a vascular anomaly and a solid lesion in liver as novel phenotypic features of 3MC1 syndrome. Conclusion Novel mutations and additional phenotypic features expand the genotypic and phenotypic spectrum of 3MC1 syndrome. Although patients with MASP-1 dysfunction in addition to disrupted MASP-3 have an altered complement system, their disease phenotype is not different from those having only MASP-3 dysfunction. Electronic supplementary material The online version of this article (doi:10.1186/s13023-015-0345-3) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Tahir Atik
- Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, 1501 NW 10th Avenue, BRB-610 M-860, Miami, FL, 33136, USA. .,Division of Genetics, Department of Pediatrics, Ege University School of Medicine, Izmir, Turkey.
| | - Asuman Koparir
- Department of Medical Genetics, Cerrahpasa Medical School, Istanbul University, Istanbul, Turkey.
| | - Guney Bademci
- Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, 1501 NW 10th Avenue, BRB-610 M-860, Miami, FL, 33136, USA.
| | - Joseph Foster
- Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, 1501 NW 10th Avenue, BRB-610 M-860, Miami, FL, 33136, USA.
| | - Umut Altunoglu
- Department of Medical Genetics, Istanbul Medical School, Istanbul University, Istanbul, Turkey.
| | - Gül Yesiltepe Mutlu
- Division of Pediatric Endocrinology and Diabetes, Kocaeli University School of Medicine, Kocaeli, Turkey.
| | - Sarah Bowdin
- Division of Clinical and Metabolic Genetics, Department of Paediatrics, The Hospital for Sick Children, Toronto, Ontario, Canada.
| | - Nursel Elcioglu
- Division of Genetics, Department of Pediatrics, Marmara University School of Medicine, Istanbul, Turkey.
| | - Gulsen A Tayfun
- Division of Genetics, Department of Pediatrics, Marmara University School of Medicine, Istanbul, Turkey.
| | - Sevinc Sahin Atik
- Department of Ophthalmology, Ataturk Teaching and Research Hospital, Katip Celebi University, Izmir, Turkey.
| | - Mustafa Ozen
- Department of Medical Genetics, Cerrahpasa Medical School, Istanbul University, Istanbul, Turkey. .,Department of Medical Genetics/Molecular Biology and Genetics Biruni University, Istanbul, Turkey.
| | - Ferda Ozkinay
- Division of Genetics, Department of Pediatrics, Ege University School of Medicine, Izmir, Turkey.
| | - Yasemin Alanay
- Division of Genetics, Department of Pediatrics, Acibadem University Medical Faculty, Istanbul, Turkey.
| | - Hulya Kayserili
- Department of Medical Genetics, Istanbul Medical School, Istanbul University, Istanbul, Turkey. .,Medical Genetics Department, Koç University School of Medicine, Istanbul, Turkey.
| | - Steffen Thiel
- Department of Biomedicine, Aarhus University, Aarhus, Denmark.
| | - Mustafa Tekin
- Dr. John T. Macdonald Foundation Department of Human Genetics and John P. Hussman Institute for Human Genomics, Miller School of Medicine, University of Miami, 1501 NW 10th Avenue, BRB-610 M-860, Miami, FL, 33136, USA.
| |
Collapse
|
7
|
Koparir A, Karatas OF, Yuceturk B, Yuksel B, Bayrak AO, Gerdan OF, Sagiroglu MS, Gezdirici A, Kirimtay K, Selcuk E, Karabay A, Creighton CJ, Yuksel A, Ozen M. Novel POC1A mutation in primordial dwarfism reveals new insights for centriole biogenesis. Hum Mol Genet 2015; 24:5378-87. [PMID: 26162852 DOI: 10.1093/hmg/ddv261] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2015] [Accepted: 07/04/2015] [Indexed: 12/17/2022] Open
Abstract
POC1A encodes a WD repeat protein localizing to centrioles and spindle poles and is associated with short stature, onychodysplasia, facial dysmorphism and hypotrichosis (SOFT) syndrome. These main features are related to the defect in cell proliferation of chondrocytes in growth plate. In the current study, we aimed at identifying the molecular basis of two patients with primordial dwarfism (PD) in a single family through utilization of whole-exome sequencing. A novel homozygous p.T120A missense mutation was detected in POC1A in both patients, a known causative gene of SOFT syndrome, and confirmed using Sanger sequencing. To test the pathogenicity of the detected mutation, primary fibroblast cultures obtained from the patients and a control individual were used. For evaluating the global gene expression profile of cells carrying p.T120A mutation in POC1A, we performed the gene expression array and compared their expression profiles to those of control fibroblast cells. The gene expression array analysis showed that 4800 transcript probes were significantly deregulated in cells with p.T120A mutation in comparison to the control. GO term association results showed that deregulated genes are mostly involved in the extracellular matrix and cytoskeleton. Furthermore, the p.T120A missense mutation in POC1A caused the formation of abnormal mitotic spindle structure, including supernumerary centrosomes, and changes in POC1A were accompanied by alterations in another centrosome-associated WD repeat protein p80-katanin. As a result, we identified a novel mutation in POC1A of patients with PD and showed that this mutation causes the formation of multiple numbers of centrioles and multipolar spindles with abnormal chromosome arrangement.
Collapse
Affiliation(s)
- Asuman Koparir
- Department of Medical Genetics, Istanbul University, Cerrahpasa Medical School, Istanbul, Turkey
| | - Omer F Karatas
- Molecular Biology and Genetics Department, Erzurum Technical University, Erzurum, Turkey
| | - Betul Yuceturk
- Advanced Genomics and Bioinformatics Research Center (IGBAM), BİLGEM, TUBITAK, Kocaeli, Turkey
| | - Bayram Yuksel
- Genetic Engineering and Biotechnology Institute, TUBITAK Marmara Research Center, Kocaeli, Turkey
| | - Ali O Bayrak
- Advanced Genomics and Bioinformatics Research Center (IGBAM), BİLGEM, TUBITAK, Kocaeli, Turkey
| | - Omer F Gerdan
- Advanced Genomics and Bioinformatics Research Center (IGBAM), BİLGEM, TUBITAK, Kocaeli, Turkey
| | - Mahmut S Sagiroglu
- Advanced Genomics and Bioinformatics Research Center (IGBAM), BİLGEM, TUBITAK, Kocaeli, Turkey
| | - Alper Gezdirici
- Department of Medical Genetics, Kanuni Sultan Suleyman Training and Research Hospital, 34303 Istanbul, Turkey
| | - Koray Kirimtay
- Department of Molecular Biology and Genetics, Istanbul Technical University, Istanbul, Turkey
| | - Ece Selcuk
- Department of Molecular Biology and Genetics, Istanbul Technical University, Istanbul, Turkey
| | - Arzu Karabay
- Department of Molecular Biology and Genetics, Istanbul Technical University, Istanbul, Turkey
| | - Chad J Creighton
- Department of Medicine and Dan L Duncan Cancer Center, Division of Biostatistics and
| | - Adnan Yuksel
- Department of Molecular Biology and Genetics, Biruni University, Topkapi, Istanbul, Turkey
| | - Mustafa Ozen
- Department of Medical Genetics, Istanbul University, Cerrahpasa Medical School, Istanbul, Turkey, Department of Pathology and Immunology, Baylor College of Medicine, Houston, TX 77030, USA and Department of Molecular Biology and Genetics, Biruni University, Topkapi, Istanbul, Turkey
| |
Collapse
|
8
|
Yuan B, Pehlivan D, Karaca E, Patel N, Charng WL, Gambin T, Gonzaga-Jauregui C, Sutton VR, Yesil G, Bozdogan ST, Tos T, Koparir A, Koparir E, Beck CR, Gu S, Aslan H, Yuregir OO, Al Rubeaan K, Alnaqeb D, Alshammari MJ, Bayram Y, Atik MM, Aydin H, Geckinli BB, Seven M, Ulucan H, Fenercioglu E, Ozen M, Jhangiani S, Muzny DM, Boerwinkle E, Tuysuz B, Alkuraya FS, Gibbs RA, Lupski JR. Global transcriptional disturbances underlie Cornelia de Lange syndrome and related phenotypes. J Clin Invest 2015; 125:636-51. [PMID: 25574841 DOI: 10.1172/jci77435] [Citation(s) in RCA: 121] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2014] [Accepted: 12/09/2014] [Indexed: 01/05/2023] Open
Abstract
Cornelia de Lange syndrome (CdLS) is a genetically heterogeneous disorder that presents with extensive phenotypic variability, including facial dysmorphism, developmental delay/intellectual disability (DD/ID), abnormal extremities, and hirsutism. About 65% of patients harbor mutations in genes that encode subunits or regulators of the cohesin complex, including NIPBL, SMC1A, SMC3, RAD21, and HDAC8. Wiedemann-Steiner syndrome (WDSTS), which shares CdLS phenotypic features, is caused by mutations in lysine-specific methyltransferase 2A (KMT2A). Here, we performed whole-exome sequencing (WES) of 2 male siblings clinically diagnosed with WDSTS; this revealed a hemizygous, missense mutation in SMC1A that was predicted to be deleterious. Extensive clinical evaluation and WES of 32 Turkish patients clinically diagnosed with CdLS revealed the presence of a de novo heterozygous nonsense KMT2A mutation in 1 patient without characteristic WDSTS features. We also identified de novo heterozygous mutations in SMC3 or SMC1A that affected RNA splicing in 2 independent patients with combined CdLS and WDSTS features. Furthermore, in families from 2 separate world populations segregating an autosomal-recessive disorder with CdLS-like features, we identified homozygous mutations in TAF6, which encodes a core transcriptional regulatory pathway component. Together, our data, along with recent transcriptome studies, suggest that CdLS and related phenotypes may be "transcriptomopathies" rather than cohesinopathies.
Collapse
|
9
|
Koparir A, Gezdirici A, Koparir E, Ulucan H, Yilmaz M, Erdemir A, Yuksel A, Ozen M. Poikiloderma with neutropenia: genotype-ethnic origin correlation, expanding phenotype and literature review. Am J Med Genet A 2014; 164A:2535-40. [PMID: 25044170 DOI: 10.1002/ajmg.a.36683] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2013] [Accepted: 05/05/2014] [Indexed: 11/06/2022]
Abstract
Poikiloderma with neutropenia (PN), is a rare genodermatosis associated with patognomic features of poikiloderma and permanent neutropenia. Three common recurrent mutations of related gene, USB1, were considered to be associated with three different ethnic origins. The most common recurrent mutation, c.531delA, has been detected in seven Caucasian patients in the literature. In this paper, we present review of all patients from the literature and report two additional patients of Turkish ancestry with the diagnosis of PN. The diagnosis of these two PN patients were made clinically and confirmed by molecular analysis which detected the most common recurrent mutation, c.531delA. Genotype-ethnic origin correlation hypothesis, therefore, has been strengthened with this result. Short stature in PN, is a common finding, which until now has never been treated with growth hormone (GH). One of our patients is the first patient with attempted treatment of short stature via GH administration. Finally, both of our patients had high-pitched voice and vocal cord nodules which might be considered as additional clinical findings not associated with PN before.
Collapse
Affiliation(s)
- Asuman Koparir
- Department of Medical Genetics, Cerrahpasa Medical School, Istanbul University, Istanbul, Turkey
| | | | | | | | | | | | | | | |
Collapse
|