Orphanet Report Series Rare Diseases Collection
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Emery-Dreifuss Muscular Dystrophy: the Most Recognizable Laminopathy
Review paper Emery-Dreifuss muscular dystrophy: the most recognizable laminopathy Agnieszka Madej-Pilarczyk, Andrzej Kochański Neuromuscular Unit, Mossakowski Medical Research Centre, Polish Academy of Sciences, Warsaw, Poland The authors dedicate this review to Prof. Irena Hausmanowa-Petrusewicz. Folia Neuropathol 2016; 54 (1): 1-8 DOI: 10.5114/fn.2016.58910 Abstract Emery-Dreifuss muscular dystrophy (EDMD), a rare inherited disease, is characterized clinically by humero-peroneal muscle atrophy and weakness, multijoint contractures, spine rigidity and cardiac insufficiency with conduction defects. There are at least six types of EDMD known so far, of which five have been associated with mutations in genes encoding nuclear proteins. The majority of the EDMD cases described so far are of the emerinopathy (EDMD1) kind, with a recessive X-linked mode of inheritance, or else laminopathy (EDMD2), with an autosomal dominant mode of inheritance. In the work described here, the authors have sought to describe the history by which EDMD came to be distinguished as a separate entity, as well as the clinical and genetic characteristics of the disease, the pathophysiolo- gy of lamin-related muscular diseases and, finally, therapeutic issues, prevention and ethical aspects. Key words: Emery-Dreifuss muscular dystrophy, emerin, lamin A/C, laminopathy, LMNA gene. embryo nic development [14,35]. Lamin A/C plays the Introduction role of a structural integrator in a cell nucleus, ensur- Laminopathies fall within a group of rare diseas- ing the maintenance of the latter’s shape, as well as es connected with structural/functional defects of its mechanical endurance (mechanotransduction). the proteins making up the nuclear envelope (which It takes part in regulation of the cell-division cycle, is composed of inner and outer nuclear membranes). -
Three New Cases of Dilated Cardiomyopathy Caused by Mutations in LMNA Gene
Acta Myologica • 2017; XXXVI: p. 207-212 Three new cases of dilated cardiomyopathy caused by mutations in LMNA gene Larysa N. Sivitskaya1, Nina G. Danilenko1, Tatiyana G. Vaikhanskaya2, Tatsiyana V. Kurushka2 and Oleg G. Davydenko1 1 Institute of Genetics and Cytology, National Academy of Sciences of Belarus, Minsk, Belarus; 2 Republican Scientific and Practical Center of Cardiology, Minsk, Belarus Three cases of delated cardiomyopathy (DCM) with conduc- Mutations in LMNA affect lamins’ dimerization and as- tion defects (OMIM 115200), limb girdle muscular dystrophy sembly (1, 2). It apparently leads to nuclear stability loss 1B (OMIM 159001) and autosomal dominant Emery-Dreifuss and inability to perform functions in its entirety. The muscular dystrophy 2 (OMIM 181350), all associated with dif- ferent LMNA mutations are presented. Three heterozygous mutations in LMNA lead to at least 10 clinically distinct missense mutations were identified in unrelated patients – p. phenotypes, termed laminopathies, affecting different W520R (c.1558T > C), p.T528R (с.1583С > G) and p.R190P tissues including cardiac and skeletal muscle, cutane- (c.569G > C). We consider these variants as pathogenic, lead- ous, nervous and adipose tissue. There is no explicit ing to isolated DCM with conduction defects or syndromic relation between syndrome development and mutation DCM forms with limb-girdle muscular dystrophy and Emery- domain localization. A number of hot spots were de- Dreifuss muscular dystrophy. The mutations were not detected in the ethnically matched control group and publicly available scribed in LMNA, but the mutations common for lami- population databases. Their de novo occurrence led to the de- nopathies were not found. -
Relevant Sources for Orphan Disease Prevalence Data
16 December 2014 1 EMA/452415/2012 Rev. 1 Human Medicines Research and Development Support This document was valid from 16 December 2014 to 9 January 2018. It is no longer valid. Relevant sources for orphan disease prevalence data Sponsors applying for orphan designation for a medicine under Article 3(1) a paragraph 1 of Regulation (EC) No 141/2000 on orphan medicinal products are requested tovalid provide authoritative references to demonstrate that the condition, for which the medicine is intended, does not affect more than 5 in 10,000 people in the EU at the time the application is made. Possible sources include relevant scientific literature and databases. After more than 10 years of the implementation of the Orphan Regulation the Agency has accumulated a considerable amount of data on sources of prevalence of rare diseases from the applications for orphan designation. In most cases those sources are publicly available but not easily accessible. The Agency has decided to make the information collected so far publicly available. This will decrease the administrative burden for applicants for orphan designation and thus encourage the development of medicines for rare diseases. The information is provided in the table below will be updated regularly. The information provided herewith does not replace the obligation for the sponsor under the legislation to establish the prevalence (see Regulation (EC) No 141/2000 and the Guideline on the format and content of applications for designation as orphan medicinal product, ENTR/6283/00). Sponsors are still obliged to submit an original, up-to-date prevalence calculation supported by data with their orphan designation application. -
Increased Nuchal Translucency Precision Panel
Increased Nuchal Translucency Precision Panel Overview Increased Nuchal Translucency (NT) is defined as an abnormal accumulation of fluid in the nuchal area, which is visualized as a thickened sonolucent area. It is a standardized measure obtained between 11 and 14 weeks of gestation to calculate the risk of a fetus being affected by a chromosomal aneuploidy. NT>3.5mm has been found to be associated with fetal chromosomal abnormalities and single-gene disorders as well as cardiac defects and other structural abnormalities in euploid and aneuploid fetuses. Proportionally as NT increases, even with a normal karyotype, there is a higher risk of adverse pregnancy outcomes such as miscarriage, intrauterine death, congenital heart defects and numerous other structural and genetic syndromes. There is not one single cause of increased NT, it is based on a complex and multifactorial process, linked to one or more embryonic processes. It has been shown that a persistently increased NT with a normal karyotype and aCGH has a 4-10% probability of being associated to Noonan Syndrome and/or other RASopathies using Whole Exome Sequencing (WES). However, the general tendency following detection of isolated enlarged NT in an euploid fetus is that most babies with normal detailed ultrasound examination and echocardiography will have uneventful outcomes. The Igenomix Increased Nuchal Translucency Precision Panel can be used to make a directed and accurate prenatal differential diagnosis of increased nuchal translucency in patients with or without a normal karyotype ultimately leading to a better management and prognosis of the associated comorbidities. It provides a comprehensive analysis of the genes involved in this disease using next-generation sequencing (NGS) to fully understand the spectrum of relevant genes involved. -
Genetic Mutations and Mechanisms in Dilated Cardiomyopathy
Genetic mutations and mechanisms in dilated cardiomyopathy Elizabeth M. McNally, … , Jessica R. Golbus, Megan J. Puckelwartz J Clin Invest. 2013;123(1):19-26. https://doi.org/10.1172/JCI62862. Review Series Genetic mutations account for a significant percentage of cardiomyopathies, which are a leading cause of congestive heart failure. In hypertrophic cardiomyopathy (HCM), cardiac output is limited by the thickened myocardium through impaired filling and outflow. Mutations in the genes encoding the thick filament components myosin heavy chain and myosin binding protein C (MYH7 and MYBPC3) together explain 75% of inherited HCMs, leading to the observation that HCM is a disease of the sarcomere. Many mutations are “private” or rare variants, often unique to families. In contrast, dilated cardiomyopathy (DCM) is far more genetically heterogeneous, with mutations in genes encoding cytoskeletal, nucleoskeletal, mitochondrial, and calcium-handling proteins. DCM is characterized by enlarged ventricular dimensions and impaired systolic and diastolic function. Private mutations account for most DCMs, with few hotspots or recurring mutations. More than 50 single genes are linked to inherited DCM, including many genes that also link to HCM. Relatively few clinical clues guide the diagnosis of inherited DCM, but emerging evidence supports the use of genetic testing to identify those patients at risk for faster disease progression, congestive heart failure, and arrhythmia. Find the latest version: https://jci.me/62862/pdf Review series Genetic mutations and mechanisms in dilated cardiomyopathy Elizabeth M. McNally, Jessica R. Golbus, and Megan J. Puckelwartz Department of Human Genetics, University of Chicago, Chicago, Illinois, USA. Genetic mutations account for a significant percentage of cardiomyopathies, which are a leading cause of conges- tive heart failure. -
DATA Poster Numbers: P Da001 - 130 Application Posters: P Da001 - 041
POSTER LIST ORDERED ALPHABETICALLY BY POSTER TITLE GROUPED BY THEME/TRACK THEME/TRACK: DATA Poster numbers: P_Da001 - 130 Application posters: P_Da001 - 041 Poster EasyChair Presenting Author list Title Abstract Theme/track Topics number number author APPLICATION POSTERS WITHIN DATA THEME P_Da001 773 Benoît Carrères, Anne Benoît Carrères A systems approach to explore Microalgae are promising platforms for sustainable biofuel production. They produce triacyl-glycerides (TAG) which are easily converted into biofuel. When exposed to nitrogen limitation, Data/ Application Klok, Maria Suarez Diez, triacylglycerol production in Neochloris Neochloris oleoabundans accumulates up to 40% of its dry weight in TAG. However, a feasible production requires a decrease of production costs, which can be partially reached by Application Lenny de Jaeger, Mark oleoabundans increasing TAG yield.We built a constraint-based model describing primary metabolism of N. oleoabundans. It was grown in combinations of light absorption and nitrate supply rates and the poster Sturme, Packo Lamers, parameters needed for modeling of metabolism were measured. Fluxes were then calculated by flux balance analysis. cDNA samples of 16 experimental conditions were sequenced, Rene' Wijffels, Vitor Dos assembled and functionally annotated. Relative expression changes and relative flux changes for all reactions in the model were compared.The model predicts a maximum TAG yield on light Santos, Peter Schaap of 1.07g (mol photons)-1, more than 3 times current yield under optimal conditions. Furthermore, from optimization scenarios we concluded that increasing light efficiency has much higher and Dirk Martens potential to increase TAG yield than blocking entire pathways.Certain reaction expression patterns suggested an interdependence of the response to nitrogen and light supply. -
Deciphering Nuclear Mechanobiology in Laminopathy
cells Review Deciphering Nuclear Mechanobiology in Laminopathy Jungwon Hah and Dong-Hwee Kim * KU-KIST Graduate School of Converging Science and Technology, Korea University, Seoul 02841, Korea; [email protected] * Correspondence: [email protected]; Tel.: +82-2-3290-4615 Received: 29 January 2019; Accepted: 5 March 2019; Published: 11 March 2019 Abstract: Extracellular mechanical stimuli are translated into biochemical signals inside the cell via mechanotransduction. The nucleus plays a critical role in mechanoregulation, which encompasses mechanosensing and mechanotransduction. The nuclear lamina underlying the inner nuclear membrane not only maintains the structural integrity, but also connects the cytoskeleton to the nuclear envelope. Lamin mutations, therefore, dysregulate the nuclear response, resulting in abnormal mechanoregulations, and ultimately, disease progression. Impaired mechanoregulations even induce malfunction in nuclear positioning, cell migration, mechanosensation, as well as differentiation. To know how to overcome laminopathies, we need to understand the mechanisms of laminopathies in a mechanobiological way. Recently, emerging studies have demonstrated the varying defects from lamin mutation in cellular homeostasis within mechanical surroundings. Therefore, this review summarizes recent findings highlighting the role of lamins, the architecture of nuclear lamina, and their disease relevance in the context of nuclear mechanobiology. We will also provide an overview of the differentiation of cellular mechanics in laminopathy. Keywords: lamin; laminopathy; cytoskeleton; nucleus 1. Introduction Mechanical stimuli are the key to controlling numerous biological processes, including proliferation, differentiation, and migration [1–3]. Integrin mediates the transduction of forces from the external microenvironment to the intracellular cytoskeleton, and the nucleo-cytoskeletal molecular connections transmit the forces to the intranuclear chromosomal organizations [4,5]. -
Preconception Carrier Screening by Genome Sequencing: Results from the Clinical Laboratory
The American Journal of Human Genetics, Volume 102 Supplemental Data Preconception Carrier Screening by Genome Sequencing: Results from the Clinical Laboratory Sumit Punj, Yassmine Akkari, Jennifer Huang, Fei Yang, Allison Creason, Christine Pak, Amiee Potter, Michael O. Dorschner, Deborah A. Nickerson, Peggy D. Robertson, Gail P. Jarvik, Laura M. Amendola, Jennifer Schleit, Dana Kostiner Simpson, Alan F. Rope, Jacob Reiss, Tia Kauffman, Marian J. Gilmore, Patricia Himes, Benjamin Wilfond, Katrina A.B. Goddard, and C. Sue Richards Supplemental Note: Clinical Report Carrier Results: Four Known Pathogenic Variants Detected. Gene Inheritance Disease Prevalence Variant Classification Pendred Syndrome/ Non- syndromic Autosomal Hearing Loss A c.1246A>C, SLC26A4 1/500 Pathogenic Recessive DFNB4 with (p.Thr416Pro) enlarged vestibular aqueduct Autosomal Spastic ++ c.1045G>A, SPG7 2-6/100,000 Pathogenic Recessive Paraplegia 7 (p.Gly349Ser) 3.7 Autosomal Alpha +++ -α HBA2 1-5/10,000 Pathogenic Recessive Thalassemia (α+- thalassemia) Autosomal Hereditary 1/200 – c.845G>A HFE Pathogenic Recessive Hemochromatosis 1/1000+ (p.Cys282Tyr) +: GeneReviews; ++: Genetics Home Reference; +++: orphan.net – varies with population; A- Generalized prevalence of all deafness and hearing loss Interpretation: A sample from this individual was referred to our laboratory for analysis of Next-Generation Genome Sequencing (NGS) and Sanger confirmation of variants identified in carrier screening for: (1) conditions with significantly shortened lifespan; (2) serious conditions; (3) mild conditions; (4) conditions with unpredictable outcomes: and (5) conditions that begin as adults. One known heterozygous missense variant, c.1246A>C (p.Thr416Pro) (NM_000441.1), was detected in exon 10 of the SLC26A4 gene of this individual by NGS. -
Genetic Determinants Underlying Rare Diseases Identified Using Next-Generation Sequencing Technologies
Western University Scholarship@Western Electronic Thesis and Dissertation Repository 8-2-2018 1:30 PM Genetic determinants underlying rare diseases identified using next-generation sequencing technologies Rosettia Ho The University of Western Ontario Supervisor Hegele, Robert A. The University of Western Ontario Graduate Program in Biochemistry A thesis submitted in partial fulfillment of the equirr ements for the degree in Master of Science © Rosettia Ho 2018 Follow this and additional works at: https://ir.lib.uwo.ca/etd Part of the Medical Genetics Commons Recommended Citation Ho, Rosettia, "Genetic determinants underlying rare diseases identified using next-generation sequencing technologies" (2018). Electronic Thesis and Dissertation Repository. 5497. https://ir.lib.uwo.ca/etd/5497 This Dissertation/Thesis is brought to you for free and open access by Scholarship@Western. It has been accepted for inclusion in Electronic Thesis and Dissertation Repository by an authorized administrator of Scholarship@Western. For more information, please contact [email protected]. Abstract Rare disorders affect less than one in 2000 individuals, placing a huge burden on individuals, families and the health care system. Gene discovery is the starting point in understanding the molecular mechanisms underlying these diseases. The advent of next- generation sequencing has accelerated discovery of disease-causing genetic variants and is showing numerous benefits for research and medicine. I describe the application of next-generation sequencing, namely LipidSeq™ ‒ a targeted resequencing panel for the identification of dyslipidemia-associated variants ‒ and whole-exome sequencing, to identify genetic determinants of several rare diseases. Utilization of next-generation sequencing plus associated bioinformatics led to the discovery of disease-associated variants for 71 patients with lipodystrophy, two with early-onset obesity, and families with brachydactyly, cerebral atrophy, microcephaly-ichthyosis, and widow’s peak syndrome. -
POEMS Syndrome: an Atypical Presentation with Chronic Diarrhoea and Asthenia
European Journal of Case Reports in Internal Medicine POEMS Syndrome: an Atypical Presentation with Chronic Diarrhoea and Asthenia Joana Alves Vaz1, Lilia Frada2, Maria Manuela Soares1, Alberto Mello e Silva1 1 Department of Internal Medicine, Egas Moniz Hospital, Lisbon, Portugal 2 Department of Gynecology and Obstetrics, Espirito Santo Hospital, Evora, Portugal Doi: 10.12890/2019_001241 - European Journal of Case Reports in Internal Medicine - © EFIM 2019 Received: 28/07/2019 Accepted: 13/11/2019 Published: 16/12/2019 How to cite this article: Alves Vaz J, Frada L, Soares MM, Mello e Silva A. POEMS syndrome: an atypical presentation with chronic diarrhoea and astenia. EJCRIM 2019;7: doi:10.12890/2019_001241. Conflicts of Interests: The Authors declare that there are no competing interest This article is licensed under a Commons Attribution Non-Commercial 4.0 License ABSTRACT POEMS syndrome is a rare paraneoplastic condition associated with polyneuropathy, organomegaly, monoclonal gammopathy, endocrine and skin changes. We report a case of a man with Castleman disease and monoclonal gammopathy, with a history of chronic diarrhoea and asthenia. Gastrointestinal involvement in POEMS syndrome is not frequently referred to in the literature and its physiopathology is not fully understood. Diagnostic criteria were met during hospitalization but considering the patient’s overall health condition, therapeutic options were limited. Current treatment for POEMS syndrome depends on the management of the underlying plasma cell disorder. This report outlines the importance of a thorough review of systems and a physical examination to allow an attempted diagnosis and appropriate treatment. LEARNING POINTS • POEMS syndrome should be suspected in the presence of peripheral polyneuropathy associated with monoclonal gammopathy; diagnostic workup is challenging and delay in treatment is very common. -
WES Gene Package Multiple Congenital Anomalie.Xlsx
Whole Exome Sequencing Gene package Multiple congenital anomalie, version 5, 1‐2‐2018 Technical information DNA was enriched using Agilent SureSelect Clinical Research Exome V2 capture and paired‐end sequenced on the Illumina platform (outsourced). The aim is to obtain 8.1 Giga base pairs per exome with a mapped fraction of 0.99. The average coverage of the exome is ~50x. Duplicate reads are excluded. Data are demultiplexed with bcl2fastq Conversion Software from Illumina. Reads are mapped to the genome using the BWA‐MEM algorithm (reference: http://bio‐bwa.sourceforge.net/). Variant detection is performed by the Genome Analysis Toolkit HaplotypeCaller (reference: http://www.broadinstitute.org/gatk/). The detected variants are filtered and annotated with Cartagenia software and classified with Alamut Visual. It is not excluded that pathogenic mutations are being missed using this technology. At this moment, there is not enough information about the sensitivity of this technique with respect to the detection of deletions and duplications of more than 5 nucleotides and of somatic mosaic mutations (all types of sequence changes). HGNC approved Phenotype description including OMIM phenotype ID(s) OMIM median depth % covered % covered % covered gene symbol gene ID >10x >20x >30x A4GALT [Blood group, P1Pk system, P(2) phenotype], 111400 607922 101 100 100 99 [Blood group, P1Pk system, p phenotype], 111400 NOR polyagglutination syndrome, 111400 AAAS Achalasia‐addisonianism‐alacrimia syndrome, 231550 605378 73 100 100 100 AAGAB Keratoderma, palmoplantar, -
Blueprint Genetics Craniosynostosis Panel
Craniosynostosis Panel Test code: MA2901 Is a 38 gene panel that includes assessment of non-coding variants. Is ideal for patients with craniosynostosis. About Craniosynostosis Craniosynostosis is defined as the premature fusion of one or more cranial sutures leading to secondary distortion of skull shape. It may result from a primary defect of ossification (primary craniosynostosis) or, more commonly, from a failure of brain growth (secondary craniosynostosis). Premature closure of the sutures (fibrous joints) causes the pressure inside of the head to increase and the skull or facial bones to change from a normal, symmetrical appearance resulting in skull deformities with a variable presentation. Craniosynostosis may occur in an isolated setting or as part of a syndrome with a variety of inheritance patterns and reccurrence risks. Craniosynostosis occurs in 1/2,200 live births. Availability 4 weeks Gene Set Description Genes in the Craniosynostosis Panel and their clinical significance Gene Associated phenotypes Inheritance ClinVar HGMD ALPL Odontohypophosphatasia, Hypophosphatasia perinatal lethal, AD/AR 78 291 infantile, juvenile and adult forms ALX3 Frontonasal dysplasia type 1 AR 8 8 ALX4 Frontonasal dysplasia type 2, Parietal foramina AD/AR 15 24 BMP4 Microphthalmia, syndromic, Orofacial cleft AD 8 39 CDC45 Meier-Gorlin syndrome 7 AR 10 19 EDNRB Hirschsprung disease, ABCD syndrome, Waardenburg syndrome AD/AR 12 66 EFNB1 Craniofrontonasal dysplasia XL 28 116 ERF Craniosynostosis 4 AD 17 16 ESCO2 SC phocomelia syndrome, Roberts syndrome