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Oliveira J, Gruber A, Cardoso M, Taipa R, Fineza I, Gonçalves A, Laner A, Winder TL, Schroeder J, Rath J, Oliveira ME, Vieira E, Sousa AP, Vieira JP, Lourenço T, Almendra L, Negrão L, Santos M, Melo-Pires M, Coelho T, den Dunnen JT, Santos R, Sousa M. LAMA2 gene mutation update: Toward a more comprehensive picture of the laminin-α2 variome and its related phenotypes. Hum Mutat 2018; 39:1314-1337. [PMID: 30055037 DOI: 10.1002/humu.23599] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Revised: 07/05/2018] [Accepted: 07/25/2018] [Indexed: 12/15/2022]
Abstract
Congenital muscular dystrophy type 1A (MDC1A) is one of the main subtypes of early-onset muscle disease, caused by disease-associated variants in the laminin-α2 (LAMA2) gene. MDC1A usually presents as a severe neonatal hypotonia and failure to thrive. Muscle weakness compromises normal motor development, leading to the inability to sit unsupported or to walk independently. The phenotype associated with LAMA2 defects has been expanded to include milder and atypical cases, being now collectively known as LAMA2-related muscular dystrophies (LAMA2-MD). Through an international multicenter collaborative effort, 61 new LAMA2 disease-associated variants were identified in 86 patients, representing the largest number of patients and new disease-causing variants in a single report. The collaborative variant collection was supported by the LOVD-powered LAMA2 gene variant database (https://www.LOVD.nl/LAMA2), updated as part of this work. As of December 2017, the database contains 486 unique LAMA2 variants (309 disease-associated), obtained from direct submissions and literature reports. Database content was systematically reviewed and further insights concerning LAMA2-MD are presented. We focus on the impact of missense changes, especially the c.2461A > C (p.Thr821Pro) variant and its association with late-onset LAMA2-MD. Finally, we report diagnostically challenging cases, highlighting the relevance of modern genetic analysis in the characterization of clinically heterogeneous muscle diseases.
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Affiliation(s)
- Jorge Oliveira
- Unidade de Genética Molecular, Centro de Genética Médica Dr. Jacinto Magalhães, Centro Hospitalar do Porto, Porto, Portugal.,Unidade Multidisciplinar de Investigação Biomédica (UMIB), Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto, Porto, Portugal
| | | | - Márcio Cardoso
- Consulta de Doenças Neuromusculares e Serviço de Neurofisiologia, Departamento de Neurociências, Centro Hospitalar do Porto, Porto, Portugal
| | - Ricardo Taipa
- Unidade de Neuropatologia, Centro Hospitalar do Porto, Porto, Portugal
| | - Isabel Fineza
- Unidade de Neuropediatria, Centro de Desenvolvimento da Criança Luís Borges, Hospital Pediátrico de Coimbra, Centro Hospitalar Universitário de Coimbra, Coimbra, Portugal
| | - Ana Gonçalves
- Unidade de Genética Molecular, Centro de Genética Médica Dr. Jacinto Magalhães, Centro Hospitalar do Porto, Porto, Portugal.,Unidade Multidisciplinar de Investigação Biomédica (UMIB), Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto, Porto, Portugal
| | | | | | | | - Julie Rath
- PreventionGenetics, Marshfield, Wisconsin
| | - Márcia E Oliveira
- Unidade de Genética Molecular, Centro de Genética Médica Dr. Jacinto Magalhães, Centro Hospitalar do Porto, Porto, Portugal.,Unidade Multidisciplinar de Investigação Biomédica (UMIB), Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto, Porto, Portugal
| | - Emília Vieira
- Unidade de Genética Molecular, Centro de Genética Médica Dr. Jacinto Magalhães, Centro Hospitalar do Porto, Porto, Portugal.,Unidade Multidisciplinar de Investigação Biomédica (UMIB), Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto, Porto, Portugal
| | - Ana Paula Sousa
- Consulta de Doenças Neuromusculares e Serviço de Neurofisiologia, Departamento de Neurociências, Centro Hospitalar do Porto, Porto, Portugal
| | - José Pedro Vieira
- Serviço de Neurologia, Hospital de Dona Estefânia, Centro Hospitalar de Lisboa Central, Lisboa, Portugal
| | - Teresa Lourenço
- Serviço de Genética Médica, Hospital de Dona Estefânia, Centro Hospitalar de Lisboa Central, Lisboa, Portugal
| | - Luciano Almendra
- Consulta de Doenças Neuromusculares, Hospitais da Universidade de Coimbra, Centro Hospitalar Universitário de Coimbra, Coimbra, Portugal
| | - Luís Negrão
- Consulta de Doenças Neuromusculares, Hospitais da Universidade de Coimbra, Centro Hospitalar Universitário de Coimbra, Coimbra, Portugal
| | - Manuela Santos
- Consulta de Doenças Neuromusculares e Serviço de Neuropediatria, Centro Hospitalar do Porto, Porto, Portugal
| | - Manuel Melo-Pires
- Unidade de Neuropatologia, Centro Hospitalar do Porto, Porto, Portugal
| | - Teresa Coelho
- Consulta de Doenças Neuromusculares e Serviço de Neurofisiologia, Departamento de Neurociências, Centro Hospitalar do Porto, Porto, Portugal
| | - Johan T den Dunnen
- Departments of Human Genetics and Clinical Genetics, Leiden University Medical Center, Leiden, the Netherlands
| | - Rosário Santos
- Unidade de Genética Molecular, Centro de Genética Médica Dr. Jacinto Magalhães, Centro Hospitalar do Porto, Porto, Portugal.,Unidade Multidisciplinar de Investigação Biomédica (UMIB), Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto, Porto, Portugal.,UCIBIO/REQUIMTE, Departamento de Ciências Biológicas, Laboratório de Bioquímica, Faculdade de Farmácia, Universidade do Porto, Porto, Portugal
| | - Mário Sousa
- Unidade Multidisciplinar de Investigação Biomédica (UMIB), Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto, Porto, Portugal.,Departamento de Microscopia, Laboratório de Biologia Celular, Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto, Porto, Portugal.,Centro de Genética da Reprodução Prof. Alberto Barros, Porto, Portugal
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Dowling O, Difeo A, Ramirez MC, Tukel T, Narla G, Bonafe L, Kayserili H, Yuksel-Apak M, Paller AS, Norton K, Teebi AS, Grum-Tokars V, Martin GS, Davis GE, Glucksman MJ, Martignetti JA. Mutations in capillary morphogenesis gene-2 result in the allelic disorders juvenile hyaline fibromatosis and infantile systemic hyalinosis. Am J Hum Genet 2003; 73:957-66. [PMID: 12973667 PMCID: PMC1180616 DOI: 10.1086/378781] [Citation(s) in RCA: 143] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2003] [Accepted: 07/23/2003] [Indexed: 11/03/2022] Open
Abstract
Juvenile hyaline fibromatosis (JHF) and infantile systemic hyalinosis (ISH) are autosomal recessive syndromes of unknown etiology characterized by multiple, recurring subcutaneous tumors, gingival hypertrophy, joint contractures, osteolysis, and osteoporosis. Both are believed to be allelic disorders; ISH is distinguished from JHF by its more severe phenotype, which includes hyaline deposits in multiple organs, recurrent infections, and death within the first 2 years of life. Using the previously reported chromosome 4q21 JHF disease locus as a guide for candidate-gene identification, we identified and characterized JHF and ISH disease-causing mutations in the capillary morphogenesis factor-2 gene (CMG2). Although CMG2 encodes a protein upregulated in endothelial cells during capillary formation and was recently shown to function as an anthrax-toxin receptor, its physiologic role is unclear. Two ISH family-specific truncating mutations, E220X and the 1-bp insertion P357insC that results in translation of an out-of-frame stop codon, were generated by site-directed mutagenesis and were shown to delete the CMG-2 transmembrane and/or cytosolic domains, respectively. An ISH compound mutation, I189T, is predicted to create a novel and destabilizing internal cavity within the protein. The JHF family-specific homoallelic missense mutation G105D destabilizes a von Willebrand factor A extracellular domain alpha-helix, whereas the other mutation, L329R, occurs within the transmembrane domain of the protein. Finally, and possibly providing insight into the pathophysiology of these diseases, analysis of fibroblasts derived from patients with JHF or ISH suggests that CMG2 mutations abrogate normal cell interactions with the extracellular matrix.
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Affiliation(s)
- Oonagh Dowling
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
| | - Analisa Difeo
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
| | - Maria C. Ramirez
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
| | - Turgut Tukel
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
| | - Goutham Narla
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
| | - Luisa Bonafe
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
| | - Hulya Kayserili
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
| | - Memnune Yuksel-Apak
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
| | - Amy S. Paller
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
| | - Karen Norton
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
| | - Ahmad S. Teebi
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
| | - Valerie Grum-Tokars
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
| | - Gail S. Martin
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
| | - George E. Davis
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
| | - Marc J. Glucksman
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
| | - John A. Martignetti
- Departments of Human Genetics, Division of Liver Diseases, Radiology, and Pediatrics and The Derald H. Ruttenberg Cancer Center, Mount Sinai School of Medicine, New York; Istanbul Medical Faculty, Department of Pediatrics, and Child Health Institute, Division of Medical Genetics, and Institute for Experimental Medicine, Department of Genetics, Istanbul University, Istanbul; Division of Molecular Paediatrics, Centre Hospitalier Universitaire Vaudois, Lausanne, Switzerland; Departments of Pediatrics and Dermatology, Children’s Memorial Hospital, Northwestern University’s Feinberg School of Medicine, Chicago; Department of Genetics, The Hospital for Sick Children, Toronto; Midwest Proteome Center and Department of Biochemistry & Molecular Biology, Finch University of Health Sciences, Chicago Medical School, North Chicago; and Department of Pathology, System Health Science Center, Texas A&M University, College Station
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