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Abstract
Clinical bioinformatics system is well-established for diagnosing genetic disease based on next-generation sequencing, but requires special considerations when being adapted for the next-generation sequencing-based genetic diagnosis of mitochondrial diseases. Challenges are caused by the involvement of mitochondrial DNA genome in disease etiology. Heteroplasmy and haplogroup are key factors in interpreting mitochondrial DNA variant effects. Data resources and tools for analyzing variant and sequencing data are available at MSeqDR, MitoMap, and HmtDB. Revised specifications of the American College of Medical Genetics/Association of Molecular Pathology standards and guidelines for mitochondrial DNA variant interpretation are proposed by the MSeqDr Consortium and community experts.
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Affiliation(s)
- Lishuang Shen
- Keck School of Medicine of USC, Center for Personalized Medicine, Children's Hospital Los Angeles, Suite 300, 2100 West 3rd Street, Los Angeles, CA 90057, USA
| | - Elizabeth M McCormick
- Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, 3401 Civic Center Boulevard, Philadelphia, PA 19104, USA
| | - Colleen Clarke Muraresku
- Mitochondrial Medicine Frontier Program, Children's Hospital of Philadelphia, 3401 Civic Center Boulevard, Philadelphia, PA 19104, USA
| | - Marni J Falk
- CHOP Mitochondrial Medicine Frontier Program, Division of Human Genetics, Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, The Children's Hospital of Philadelphia, ARC 1002c, 3615 Civic Center Boulevard, Philadelphia, PA 19104, USA
| | - Xiaowu Gai
- Keck School of Medicine of USC, Center for Personalized Medicine, Children's Hospital Los Angeles, Suite 300, 2100 West 3rd Street, Los Angeles, CA 90057, USA.
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2
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Gonçalves FG, Hill B, Guo Y, Muraresku CC, McCormick E, Alves CAPF, Teixeira SR, Martin-Saavedra JS, Zolkipli-Cunningham Z, Falk MJ, Vossough A, Goldstein A, Zuccoli G. The Perirolandic Sign: A Unique Imaging Finding Observed in Association with Polymerase γ-Related Disorders. AJNR Am J Neuroradiol 2020; 41:917-922. [PMID: 32381541 DOI: 10.3174/ajnr.a6514] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 02/27/2020] [Indexed: 11/07/2022]
Abstract
Pathogenic variants in the polymerase γ gene (POLG) cause a diverse group of pathologies known as POLG-related disorders. In this report, we describe brain MR imaging findings and electroencephalogram correlates of 13 children with POLG-related disorders at diagnosis and follow-up. At diagnosis, all patients had seizures and 12 had abnormal MR imaging findings. The most common imaging findings were unilateral or bilateral perirolandic (54%) and unilateral or bilateral thalamic signal changes (77%). Association of epilepsia partialis continua with perirolandic and thalamic signal changes was present in 86% and 70% of the patients, respectively. The occipital lobe was affected in 2 patients. On follow-up, 92% of the patients had disease progression or fatal outcome. Rapid volume loss was seen in 77% of the patients. The occipital lobe (61%) and thalamus (61%) were the most affected brain regions. Perirolandic signal changes and seizures may represent a brain imaging biomarker of early-onset pediatric POLG-related disorders.
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Affiliation(s)
- F G Gonçalves
- From the Departments of Radiology and Division of Neuroradiology (F.G.G., B.H., C.A.P.F.A., S.R.T., J.S.M.-S., A.V., G.Z.)
| | - B Hill
- From the Departments of Radiology and Division of Neuroradiology (F.G.G., B.H., C.A.P.F.A., S.R.T., J.S.M.-S., A.V., G.Z.)
| | - Y Guo
- Departments of Pediatrics (Y.G., Z.Z.-C., M.J.F., A.G.)
| | - C C Muraresku
- Mitochondrial Medicine Frontier Program, Division of Human Genetics (C.C.M., E.M., Z.Z.-C., M.J.F., A.G.), Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - E McCormick
- Mitochondrial Medicine Frontier Program, Division of Human Genetics (C.C.M., E.M., Z.Z.-C., M.J.F., A.G.), Children's Hospital of Philadelphia, Philadelphia, Pennsylvania
| | - C A P F Alves
- From the Departments of Radiology and Division of Neuroradiology (F.G.G., B.H., C.A.P.F.A., S.R.T., J.S.M.-S., A.V., G.Z.)
| | - S R Teixeira
- From the Departments of Radiology and Division of Neuroradiology (F.G.G., B.H., C.A.P.F.A., S.R.T., J.S.M.-S., A.V., G.Z.)
| | - J S Martin-Saavedra
- From the Departments of Radiology and Division of Neuroradiology (F.G.G., B.H., C.A.P.F.A., S.R.T., J.S.M.-S., A.V., G.Z.)
| | - Z Zolkipli-Cunningham
- Mitochondrial Medicine Frontier Program, Division of Human Genetics (C.C.M., E.M., Z.Z.-C., M.J.F., A.G.), Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.,Departments of Pediatrics (Y.G., Z.Z.-C., M.J.F., A.G.)
| | - M J Falk
- Mitochondrial Medicine Frontier Program, Division of Human Genetics (C.C.M., E.M., Z.Z.-C., M.J.F., A.G.), Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.,Departments of Pediatrics (Y.G., Z.Z.-C., M.J.F., A.G.)
| | - A Vossough
- From the Departments of Radiology and Division of Neuroradiology (F.G.G., B.H., C.A.P.F.A., S.R.T., J.S.M.-S., A.V., G.Z.).,Radiology (A.V.), University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania
| | - A Goldstein
- Mitochondrial Medicine Frontier Program, Division of Human Genetics (C.C.M., E.M., Z.Z.-C., M.J.F., A.G.), Children's Hospital of Philadelphia, Philadelphia, Pennsylvania.,Departments of Pediatrics (Y.G., Z.Z.-C., M.J.F., A.G.)
| | - G Zuccoli
- From the Departments of Radiology and Division of Neuroradiology (F.G.G., B.H., C.A.P.F.A., S.R.T., J.S.M.-S., A.V., G.Z.).,The Program for the Study of Neurodevelopment in Rare Disorders (NDRD) (G.Z.), Children's Hospital of Pittsburgh of UPMC
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3
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Shen L, Diroma MA, Gonzalez M, Navarro-Gomez D, Leipzig J, Lott MT, van Oven M, Wallace DC, Muraresku CC, Zolkipli-Cunningham Z, Chinnery PF, Attimonelli M, Zuchner S, Falk MJ, Gai X. MSeqDR: A Centralized Knowledge Repository and Bioinformatics Web Resource to Facilitate Genomic Investigations in Mitochondrial Disease. Hum Mutat 2016; 37:540-548. [PMID: 26919060 DOI: 10.1002/humu.22974] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [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: 11/25/2015] [Accepted: 02/03/2016] [Indexed: 11/11/2022]
Abstract
MSeqDR is the Mitochondrial Disease Sequence Data Resource, a centralized and comprehensive genome and phenome bioinformatics resource built by the mitochondrial disease community to facilitate clinical diagnosis and research investigations of individual patient phenotypes, genomes, genes, and variants. A central Web portal (https://mseqdr.org) integrates community knowledge from expert-curated databases with genomic and phenotype data shared by clinicians and researchers. MSeqDR also functions as a centralized application server for Web-based tools to analyze data across both mitochondrial and nuclear DNA, including investigator-driven whole exome or genome dataset analyses through MSeqDR-Genesis. MSeqDR-GBrowse genome browser supports interactive genomic data exploration and visualization with custom tracks relevant to mtDNA variation and mitochondrial disease. MSeqDR-LSDB is a locus-specific database that currently manages 178 mitochondrial diseases, 1,363 genes associated with mitochondrial biology or disease, and 3,711 pathogenic variants in those genes. MSeqDR Disease Portal allows hierarchical tree-style disease exploration to evaluate their unique descriptions, phenotypes, and causative variants. Automated genomic data submission tools are provided that capture ClinVar compliant variant annotations. PhenoTips will be used for phenotypic data submission on deidentified patients using human phenotype ontology terminology. The development of a dynamic informed patient consent process to guide data access is underway to realize the full potential of these resources.
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Affiliation(s)
- Lishuang Shen
- Center for Personalized Medicine, Children's Hospital Los Angeles, Los Angeles, California, USA.,Massachusetts Eye and Ear Infirmary, Harvard Medical School, 243 Charles St, Boston, Massachusetts, USA
| | - Maria Angela Diroma
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy.,CEINGE-Biotecnologie Avanzate, Napoli, Italy
| | - Michael Gonzalez
- Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA.,The Genesis Project, Miami, Florida, USA
| | - Daniel Navarro-Gomez
- Massachusetts Eye and Ear Infirmary, Harvard Medical School, 243 Charles St, Boston, Massachusetts, USA
| | - Jeremy Leipzig
- Center for Biomedical Informatics, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Marie T Lott
- Center for Mitochondrial and Epigenomic Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA
| | - Mannis van Oven
- Department of Forensic Molecular Biology, Erasmus MC - University Medical Center Rotterdam, The Netherlands
| | - Douglas C Wallace
- Center for Mitochondrial and Epigenomic Medicine, The Children's Hospital of Philadelphia, Philadelphia, Pennsylvania, USA.,Department of Pathology, The Children's Hospital of Philadelphia and University of Pennsylvania Perelman School of Medicine, Philadelphia, Pennsylvania, USA
| | - Colleen Clarke Muraresku
- Division of Human Genetics, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia USA
| | | | - Patrick F Chinnery
- Department of Clinical Neurosciences, Cambridge Biomedical Campus, Cambridge, United Kingdom
| | - Marcella Attimonelli
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari, Bari, Italy
| | - Stephan Zuchner
- Dr. John T. Macdonald Foundation Department of Human Genetics, University of Miami Miller School of Medicine, Miami, Florida, USA.,The Genesis Project, Miami, Florida, USA
| | - Marni J Falk
- Division of Human Genetics, Department of Pediatrics, The Children's Hospital of Philadelphia, Philadelphia USA.,Department of Pediatrics, University of Pennsylvania Perelman School of Medicine, Philadelphia, USA
| | - Xiaowu Gai
- Center for Personalized Medicine, Children's Hospital Los Angeles, Los Angeles, California, USA.,Massachusetts Eye and Ear Infirmary, Harvard Medical School, 243 Charles St, Boston, Massachusetts, USA
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4
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Ganetzky R, Izumi K, Edmondson A, Muraresku CC, Zackai E, Deardorff M, Ganesh J. Fetal akinesia deformation sequence due to a congenital disorder of glycosylation. Am J Med Genet A 2015; 167A:2411-7. [DOI: 10.1002/ajmg.a.37184] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Accepted: 05/15/2015] [Indexed: 12/12/2022]
Affiliation(s)
- Rebecca Ganetzky
- Division of Genetics; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
- Section of Biochemical Genetics; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
| | - Kosuke Izumi
- Division of Genetics; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
- Section of Biochemical Genetics; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
| | - Andrew Edmondson
- The Perelman School of Medicine at The University of Pennsylvania; Philadelphia Pennsylvania
| | - Colleen Clarke Muraresku
- Section of Biochemical Genetics; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
| | - Elaine Zackai
- Division of Genetics; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
- The Perelman School of Medicine at The University of Pennsylvania; Philadelphia Pennsylvania
| | - Matthew Deardorff
- Division of Genetics; The Children's Hospital of Philadelphia; Philadelphia Pennsylvania
- The Perelman School of Medicine at The University of Pennsylvania; Philadelphia Pennsylvania
| | - Jaya Ganesh
- Genetics Program, Children's Regional Hospital; Cooper University Health Care
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