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Ohiri JC, Dellefave‐Castillo L, Tomar G, Wilsbacher L, Choudhury L, Barefield DY, Fullenkamp D, Gacita AM, Monroe TO, Pesce L, Blancard M, Vaught L, George AL, Demonbreun AR, Puckelwartz MJ, McNally EM. Reduction of Filamin C Results in Altered Proteostasis, Cardiomyopathy, and Arrhythmias. J Am Heart Assoc 2024; 13:e030467. [PMID: 38761081 PMCID: PMC11179814 DOI: 10.1161/jaha.123.030467] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Accepted: 04/17/2024] [Indexed: 05/20/2024]
Abstract
BACKGROUND Many cardiomyopathy-associated FLNC pathogenic variants are heterozygous truncations, and FLNC pathogenic variants are associated with arrhythmias. Arrhythmia triggers in filaminopathy are incompletely understood. METHODS AND RESULTS We describe an individual with biallelic FLNC pathogenic variants, p.Arg650X and c.970-4A>G, with peripartum cardiomyopathy and ventricular arrhythmias. We also describe clinical findings in probands with FLNC variants including Val2715fs87X, Glu2458Serfs71X, Phe106Leu, and c.970-4A>G with hypertrophic and dilated cardiomyopathy, atrial fibrillation, and ventricular tachycardia. Induced pluripotent stem cell-derived cardiomyocytes (iPSC-CMs) were generated. The FLNC truncation, Arg650X/c.970-4A>G, showed a marked reduction in filamin C protein consistent with biallelic loss of function mutations. To assess loss of filamin C, gene editing of a healthy control iPSC line was used to generate a homozygous FLNC disruption in the actin binding domain. Because filamin C has been linked to protein quality control, we assessed the necessity of filamin C in iPSC-CMs for response to the proteasome inhibitor bortezomib. After exposure to low-dose bortezomib, FLNC-null iPSC-CMs showed an increase in the chaperone proteins BAG3, HSP70 (heat shock protein 70), and HSPB8 (small heat shock protein B8) and in the autophagy marker LC3I/II. FLNC null iPSC-CMs had prolonged electric field potential, which was further prolonged in the presence of low-dose bortezomib. FLNC null engineered heart tissues had impaired function after low-dose bortezomib. CONCLUSIONS FLNC pathogenic variants associate with a predisposition to arrhythmias, which can be modeled in iPSC-CMs. Reduction of filamin C prolonged field potential, a surrogate for action potential, and with bortezomib-induced proteasome inhibition, reduced filamin C led to greater arrhythmia potential and impaired function.
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Affiliation(s)
- Joyce C. Ohiri
- Center for Genetic Medicine, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
| | | | - Garima Tomar
- Center for Genetic Medicine, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
| | - Lisa Wilsbacher
- Feinberg Cardiovascular and Renal Research Institute, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
| | - Lubna Choudhury
- Bluhm Cardiovascular InstituteNorthwestern MedicineChicagoILUSA
| | - David Y. Barefield
- Center for Genetic Medicine, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
- Cell and Molecular PhysiologyLoyola University Stritch School of MedicineMaywoodILUSA
| | - Dominic Fullenkamp
- Center for Genetic Medicine, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
| | - Anthony M. Gacita
- Center for Genetic Medicine, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
| | - Tanner O. Monroe
- Center for Genetic Medicine, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
| | - Lorenzo Pesce
- Center for Genetic Medicine, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
| | - Malorie Blancard
- Department of Pharmacology, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
| | - Lauren Vaught
- Center for Genetic Medicine, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
| | - Alfred L. George
- Department of Pharmacology, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
| | - Alexis R. Demonbreun
- Center for Genetic Medicine, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
- Department of Pharmacology, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
| | - Megan J. Puckelwartz
- Center for Genetic Medicine, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
- Department of Pharmacology, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
| | - Elizabeth M. McNally
- Center for Genetic Medicine, Feinberg School of MedicineNorthwestern UniversityChicagoILUSA
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2
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Daya NM, Döring K, Zhuge H, Volke L, Stab V, Dietz J, Athamneh M, Roos A, Zaehres H, Güttsches AK, Mavrommatis L, Vorgerd M. Generation of two hiPSCs lines of two patients carrying truncating mutations in the dimerization domain of filamin C. Stem Cell Res 2024; 76:103320. [PMID: 38309149 DOI: 10.1016/j.scr.2024.103320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/30/2023] [Revised: 01/19/2024] [Accepted: 01/23/2024] [Indexed: 02/05/2024] Open
Abstract
Here we introduce the human induced pluripotent stem cell lines (hiPSCs), HIMRi004-A and HIMRi005-A from dermal fibroblasts of a 48-year-old female (HIMRi004-A) carrying missense mutation that translate to the first described filamin C isoform p.W2710X and from a 56-year-old female (HIMRi005-A) carrying a recently described mutation in the same domain p.Y2704X. Both lines are generated via lentiviral expression of OCT4, SOX2, KLF4 and c-MYC. The lines display a typical embryonic stem cell-like morphology, express pluripotency markers, retain a normal karyotype (46, XX) and have the differentiation capacity in all three germ layers. The two lines can be used to elucidate the pathomechanisms of FLNC myofibrillar myopathies and to develop novel therapeutic options.
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Affiliation(s)
- N M Daya
- Department of Neurology, Heimer Institute for Muscle Research, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - K Döring
- Department of Human Genetics, Ruhr-University Bochum, 44801 Bochum, Germany
| | - H Zhuge
- Department of Neurology, Heimer Institute for Muscle Research, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - L Volke
- Department of Neurology, Heimer Institute for Muscle Research, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - V Stab
- Department of Endocrinology, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - J Dietz
- Department of Neurology, Heimer Institute for Muscle Research, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - M Athamneh
- Department of Clinical Science, Faculty of Medicine, Yarmouk University, Irbid, Jordan
| | - A Roos
- Department of Neurology, Heimer Institute for Muscle Research, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - H Zaehres
- Department of Anatomy and Molecular Embryology, Institute of Anatomy, Ruhr-University Bochum, 44801 Bochum, Germany
| | - A K Güttsches
- Department of Neurology, Heimer Institute for Muscle Research, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - L Mavrommatis
- Department of Neurology, Heimer Institute for Muscle Research, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - M Vorgerd
- Department of Neurology, Heimer Institute for Muscle Research, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany.
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Onnée M, Bénézit A, Bastu S, Nadaj-Pakleza A, Lannes B, Ader F, Thèze C, Cintas P, Cances C, Carlier RY, Metay C, Cossée M, Malfatti E. The FLNC Ala1186Val Variant Linked to Cytoplasmic Body Myopathy and Cardiomyopathy Causes Protein Instability. Biomedicines 2024; 12:322. [PMID: 38397924 PMCID: PMC10887408 DOI: 10.3390/biomedicines12020322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 01/18/2024] [Accepted: 01/22/2024] [Indexed: 02/25/2024] Open
Abstract
Filamin C-related disorders include myopathies and cardiomyopathies linked to variants in the FLNC gene. Filamin C belongs to a family of actin-binding proteins involved in sarcomere stability. This study investigates the pathogenic impact of the FLNC c.3557C > T (p.Ala1186Val) pathogenic variant associated with an early-onset cytoplasmic body myopathy and cardiomyopathy in three unrelated patients. We performed clinical imaging and myopathologic and genetic characterization of three patients with an early-onset myopathy and cardiomyopathy. Bioinformatics analysis, variant interpretation, and protein structure analysis were performed to validate and assess the effects of the filamin C variant. All patients presented with a homogeneous clinical phenotype marked by a severe contractural myopathy, leading to loss of gait. There was prominent respiratory involvement and restrictive or hypertrophic cardiomyopathies. The Ala1186Val variant is located in the interstrand loop involved in intradomain stabilization and/or interdomain interactions with neighbor Ig-like domains. 3D modeling highlights local structural changes involving nearby residues and probably impacts the protein stability, causing protein aggregation in the form of cytoplasmic bodies. Myopathologic studies have disclosed the prominent aggregation and upregulation of the aggrephagy-associated proteins LC3B and p62. As a whole, the Ala1186Val variant in the FLNC gene provokes a severe myopathy with contractures, respiratory involvement, and cardiomyopathy due to protein aggregation in patients' muscles.
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Affiliation(s)
- Marion Onnée
- Institut Mondor de Recherche Biomédicale, Université Paris Est Créteil, Institut National de la Santé et de la Recherche Médicale U955, 94010 Créteil, France; (M.O.); (S.B.)
| | - Audrey Bénézit
- Neurologie et Réanimation Pédiatrique, Assistance Publique–Hôpitaux de Paris, Université Paris Saclay, Département Médico-Universitaire Santé de l’Enfant et de l’Adolescent, Hôpital Raymond Poincaré, 92380 Garches, France;
| | - Sultan Bastu
- Institut Mondor de Recherche Biomédicale, Université Paris Est Créteil, Institut National de la Santé et de la Recherche Médicale U955, 94010 Créteil, France; (M.O.); (S.B.)
| | - Aleksandra Nadaj-Pakleza
- Centre de Référence des Maladies Neuromusculaires Nord Est Ile-de-France, Service de Neurologie, Hôpitaux Universitaires de Strasbourg, 67200 Strasbourg, France;
- European Reference Network, EURO-NMD, Neuromuscular Centre at Hautepierre Hospital, Hôpitaux Universitaires de Strasbourg, 67200 Strasbourg, France
| | - Béatrice Lannes
- Département de Pathologie, Hôpitaux Universitaires de Strasbourg, 67091 Strasbourg, France;
| | - Flavie Ader
- Assistance Publique–Hôpitaux de Paris, Sorbonne Université, Département Médico-Universitaire BioGem, Unité Fonctionnelle de Cardiogénétique et Myogénétique Moléculaire et Cellulaire, 75013 Paris, France;
- Institut National de la Santé et de la Recherche Médicale UMRS1166, Université Paris Cité, 75006 Paris, France
| | - Corinne Thèze
- Laboratoire de Génétique Moléculaire, Centre Hospitalier Universitaire de Montpellier, Université de Montpellier, 34095 Montpellier, France;
| | - Pascal Cintas
- Centre de Référence des Maladies Neuromusculaires AOC (Atlantique-Occitanie-Caraïbes), Département de Neurologie, Hôpital Pierre-Paul Riquet, Centre Hospitalier Universitaire de Toulouse, 31059 Toulouse, France; (P.C.); (M.C.)
| | - Claude Cances
- Centre de Référence des Maladies Neuromusculaires AOC (Atlantique-Occitanie-Caraïbes), Unité de Neurologie Pédiatrique, Hôpital des Enfants, Centre Hospitalier Universitaire de Toulouse, 31059 Toulouse, France;
| | - Robert-Yves Carlier
- Assistance Publique–Hôpitaux de Paris, Groupe Hospitalier Universitaire Paris Saclay, Département Médico-Universitaire Smart Imaging, Service d’Imagerie Médicale, Institut National de la Santé et de la Recherche Médicale UMR1179, Hôpital Raymond Poincaré, 92380 Garches, France;
| | - Corinne Metay
- Unité Fonctionnelle de Cardiogénétique et Myogénétique Moléculaire et Cellulaire, Centre de Génétique Moléculaire et Chromosomique, Sorbonne Université, Institut National de la Santé et de la Recherche Médicale, Institut de Myologie, Groupe Hospitalier La Pitié-Salpêtrière, 75013 Paris, France;
| | - Mireille Cossée
- Centre de Référence des Maladies Neuromusculaires AOC (Atlantique-Occitanie-Caraïbes), Département de Neurologie, Hôpital Pierre-Paul Riquet, Centre Hospitalier Universitaire de Toulouse, 31059 Toulouse, France; (P.C.); (M.C.)
- PhyMedExp, Université de Montpellier, Institut National de la Santé et de la Recherche Médicale, Centre National de la Recherche Scientifique, 34295 Montpellier, France
| | - Edoardo Malfatti
- Institut Mondor de Recherche Biomédicale, Université Paris Est Créteil, Institut National de la Santé et de la Recherche Médicale U955, 94010 Créteil, France; (M.O.); (S.B.)
- Assistance Publique–Hôpitaux de Paris, Centre de Référence de Pathologie Neuromusculaire Nord-Est-Ile-de-France, Hôpital Henri Mondor, 94000 Créteil, France
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Lohanadan K, Assent M, Linnemann A, Schuld J, Heukamp LC, Krause K, Vorgerd M, Reimann J, Schänzer A, Kirfel G, Fürst DO, Van der Ven PFM. Synaptopodin-2 Isoforms Have Specific Binding Partners and Display Distinct, Muscle Cell Type-Specific Expression Patterns. Cells 2023; 13:85. [PMID: 38201288 PMCID: PMC10778272 DOI: 10.3390/cells13010085] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/18/2023] [Accepted: 12/28/2023] [Indexed: 01/12/2024] Open
Abstract
Synaptopodin-2 (SYNPO2) is a protein associated with the Z-disc in striated muscle cells. It interacts with α-actinin and filamin C, playing a role in Z-disc maintenance under stress by chaperone-assisted selective autophagy (CASA). In smooth muscle cells, SYNPO2 is a component of dense bodies. Furthermore, it has been proposed to play a role in tumor cell proliferation and metastasis in many different kinds of cancers. Alternative transcription start sites and alternative splicing predict the expression of six putative SYNPO2 isoforms differing by extended amino- and/or carboxy-termini. Our analyses at mRNA and protein levels revealed differential expression of SYNPO2 isoforms in cardiac, skeletal and smooth muscle cells. We identified synemin, an intermediate filament protein, as a novel binding partner of the PDZ-domain in the amino-terminal extension of the isoforms mainly expressed in cardiac and smooth muscle cells, and demonstrated colocalization of SYNPO2 and synemin in both cell types. A carboxy-terminal extension, mainly expressed in smooth muscle cells, is sufficient for association with dense bodies and interacts with α-actinin. SYNPO2 therefore represents an additional and novel link between intermediate filaments and the Z-discs in cardiomyocytes and dense bodies in smooth muscle cells, respectively. In pathological skeletal muscle samples, we identified SYNPO2 in the central and intermediate zones of target fibers of patients with neurogenic muscular atrophy, and in nemaline bodies. Our findings help to understand distinct functions of individual SYNPO2 isoforms in different muscle tissues, but also in tumor pathology.
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Affiliation(s)
| | - Marvin Assent
- Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Anja Linnemann
- Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Julia Schuld
- Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Lukas C. Heukamp
- Department of Pathology, University Hospital Bonn, 53127 Bonn, Germany
| | - Karsten Krause
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Matthias Vorgerd
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Jens Reimann
- Department of Neurology, Neuromuscular Diseases Section, University Hospital Bonn, 53127 Bonn, Germany
| | - Anne Schänzer
- Institute of Neuropathology, Justus-Liebig-University Giessen, 35392 Giessen, Germany
| | - Gregor Kirfel
- Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Dieter O. Fürst
- Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
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5
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Roos A, van der Ven PFM, Alrohaif H, Kölbel H, Heil L, Della Marina A, Weis J, Aßent M, Beck-Wödl S, Barresi R, Töpf A, O’Connor K, Sickmann A, Kohlschmidt N, El Gizouli M, Meyer N, Daya N, Grande V, Bois K, Kaiser FJ, Vorgerd M, Schröder C, Schara-Schmidt U, Gangfuss A, Evangelista T, Röbisch L, Hentschel A, Grüneboom A, Fuerst DO, Kuechler A, Tzschach A, Depienne C, Lochmüller H. Bi-allelic variants of FILIP1 cause congenital myopathy, dysmorphism and neurological defects. Brain 2023; 146:4200-4216. [PMID: 37163662 PMCID: PMC10545528 DOI: 10.1093/brain/awad152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 03/16/2023] [Accepted: 04/11/2023] [Indexed: 05/12/2023] Open
Abstract
Filamin-A-interacting protein 1 (FILIP1) is a structural protein that is involved in neuronal and muscle function and integrity and interacts with FLNa and FLNc. Pathogenic variants in filamin-encoding genes have been linked to neurological disorders (FLNA) and muscle diseases characterized by myofibrillar perturbations (FLNC), but human diseases associated with FILIP1 variants have not yet been described. Here, we report on five patients from four unrelated consanguineous families with homozygous FILIP1 variants (two nonsense and two missense). Functional studies indicated altered stability of the FILIP1 protein carrying the p.[Pro1133Leu] variant. Patients exhibit a broad spectrum of neurological symptoms including brain malformations, neurodevelopmental delay, muscle weakness and pathology and dysmorphic features. Electron and immunofluorescence microscopy on the muscle biopsy derived from the patient harbouring the homozygous p.[Pro1133Leu] missense variant revealed core-like zones of myofibrillar disintegration, autophagic vacuoles and accumulation of FLNc. Proteomic studies on the fibroblasts derived from the same patient showed dysregulation of a variety of proteins including FLNc and alpha-B-crystallin, a finding (confirmed by immunofluorescence) which is in line with the manifestation of symptoms associated with the syndromic phenotype of FILIP1opathy. The combined findings of this study show that the loss of functional FILIP1 leads to a recessive disorder characterized by neurological and muscular manifestations as well as dysmorphic features accompanied by perturbed proteostasis and myopathology.
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Affiliation(s)
- Andreas Roos
- Department of Pediatric Neurology, Center for Neuromuscular Disorders, Center for Translational Neuro- and Behavioral Sciences, University Duisburg-Essen, 45147 Essen, Germany
- Brain and Mind Research Institute, Children’s Hospital of Eastern Ontario Research Institute, Ottawa, ON, K1H 8L1, Canada
- Department of Neurology, University Hospital Bergmannsheil, Heimer Institute for Muscle Research, 44789 Bochum, Germany
| | - Peter F M van der Ven
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Hadil Alrohaif
- John Walton Muscular Dystrophy Research Centre, Translational and Clinical Research Institute, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, NE1 3BZ, UK
- Kuwait Medical Genetics Center, Sabah Hospital, Kuwait City, Kuwait
| | - Heike Kölbel
- Department of Pediatric Neurology, Center for Neuromuscular Disorders, Center for Translational Neuro- and Behavioral Sciences, University Duisburg-Essen, 45147 Essen, Germany
| | - Lorena Heil
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Adela Della Marina
- Department of Pediatric Neurology, Center for Neuromuscular Disorders, Center for Translational Neuro- and Behavioral Sciences, University Duisburg-Essen, 45147 Essen, Germany
| | - Joachim Weis
- Institute of Neuropathology, RWTH Aachen University Hospital, 52074 Aachen, Germany
| | - Marvin Aßent
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Stefanie Beck-Wödl
- Institute of Medical Genetics and Applied Genomics, University of Tübingen, 72076 Tübingen, Germany
| | | | - Ana Töpf
- John Walton Muscular Dystrophy Research Centre, Translational and Clinical Research Institute, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, NE1 3BZ, UK
| | - Kaela O’Connor
- Brain and Mind Research Institute, Children’s Hospital of Eastern Ontario Research Institute, Ottawa, ON, K1H 8L1, Canada
| | - Albert Sickmann
- Department of Bioanalytics, Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., 44227 Dortmund, Germany
| | | | - Magdeldin El Gizouli
- Institute of Human Genetics, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany
| | - Nancy Meyer
- Department of Pediatric Neurology, Center for Neuromuscular Disorders, Center for Translational Neuro- and Behavioral Sciences, University Duisburg-Essen, 45147 Essen, Germany
| | - Nassam Daya
- Department of Neurology, University Hospital Bergmannsheil, Heimer Institute for Muscle Research, 44789 Bochum, Germany
| | - Valentina Grande
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Karin Bois
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Frank J Kaiser
- Institute of Human Genetics, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany
| | - Matthias Vorgerd
- Department of Neurology, University Hospital Bergmannsheil, Heimer Institute for Muscle Research, 44789 Bochum, Germany
| | - Christopher Schröder
- Institute of Human Genetics, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany
| | - Ulrike Schara-Schmidt
- Department of Pediatric Neurology, Center for Neuromuscular Disorders, Center for Translational Neuro- and Behavioral Sciences, University Duisburg-Essen, 45147 Essen, Germany
| | - Andrea Gangfuss
- Department of Pediatric Neurology, Center for Neuromuscular Disorders, Center for Translational Neuro- and Behavioral Sciences, University Duisburg-Essen, 45147 Essen, Germany
| | - Teresinha Evangelista
- John Walton Muscular Dystrophy Research Centre, Translational and Clinical Research Institute, Newcastle University and Newcastle Hospitals NHS Foundation Trust, Newcastle upon Tyne, NE1 3BZ, UK
- Nord/Est/Ile-de-France Neuromuscular Reference Center, Institute of Myology, Pitié-Salpêtrière Hospital, APHP, Sorbonne University, 75013 Paris, France
| | - Luisa Röbisch
- Department of Bioanalytics, Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., 44227 Dortmund, Germany
| | - Andreas Hentschel
- Department of Bioanalytics, Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., 44227 Dortmund, Germany
| | - Anika Grüneboom
- Department of Bioanalytics, Leibniz-Institut für Analytische Wissenschaften - ISAS - e.V., 44227 Dortmund, Germany
| | - Dieter O Fuerst
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Alma Kuechler
- Institute of Human Genetics, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany
| | - Andreas Tzschach
- Medical Center, Faculty of Medicine, Institute of Human Genetics, University of Freiburg, 79106 Freiburg, Germany
| | - Christel Depienne
- Institute of Human Genetics, University Hospital Essen, University of Duisburg-Essen, 45147 Essen, Germany
| | - Hanns Lochmüller
- Brain and Mind Research Institute, Children’s Hospital of Eastern Ontario Research Institute, Ottawa, ON, K1H 8L1, Canada
- Division of Neurology, Department of Medicine, The Ottawa Hospital, Ottawa, ON, K1H 8L1, Canada
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6
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Li Q, Wu K, Zhang Y, Liu Y, Wang Y, Chen Y, Sun S, Duan C. Construction of HBV-HCC prognostic model and immune characteristics based on potential genes mining through protein interaction networks. J Cancer Res Clin Oncol 2023; 149:11263-11278. [PMID: 37358667 DOI: 10.1007/s00432-023-04989-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Accepted: 06/15/2023] [Indexed: 06/27/2023]
Abstract
OBJECTIVE To search for human protein-coding genes related to hepatocellular carcinoma (HCC) in the context of hepatitis B virus (HBV) infection, and perform prognosis risk assessment. METHODS Genes related to HBV-HCC were selected through literature screening and protein-protein interaction (PPI) network database analysis. Prognosis potential genes (PPGs) were identified using Cox regression analysis. Patients were divided into high-risk and low-risk groups based on PPGs, and risk scores were calculated. Kaplan-Meier plots were used to analyze overall survival rates, and the results were predicted based on clinicopathological variables. Association analysis was also conducted with immune infiltration, immune therapy, and drug sensitivity. Experimental verification of the expression of PPGs was done in patient liver cancer tissue and normal liver tissue adjacent to tumors. RESULTS The use of a prognosis potential genes risk assessment model can reliably predict the prognosis risk of patients, demonstrating strong predictive ability. Kaplan-Meier analysis showed that the overall survival rate of the low-risk group was significantly higher than that of the high-risk group. There were significant differences between the two subgroups in terms of immune infiltration and IC50 association analysis. Experimental verification revealed that CYP2C19, FLNC, and HNRNPC were highly expressed in liver cancer tissue, while UBE3A was expressed at a lower level. CONCLUSION PPGs can be used to predict the prognosis risk of HBV-HCC patients and play an important role in the diagnosis and treatment of liver cancer. They also reveal their potential role in the tumor immune microenvironment, clinical-pathological characteristics, and prognosis.
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Affiliation(s)
- Qingxiu Li
- Department of Cell Biology and Medical Genetics, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, 400016, China
| | - Kejia Wu
- Department of Cell Biology and Medical Genetics, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, 400016, China
| | - Yiqi Zhang
- Department of Cell Biology and Medical Genetics, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, 400016, China
| | - Yuxin Liu
- Department of Cell Biology and Medical Genetics, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, 400016, China
| | - Yalan Wang
- Department of Cell Biology and Medical Genetics, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, 400016, China
| | - Yong Chen
- Department of Hepatobillary Surgery, The First Affiliated Hospital, Chongqing Medical University, Chongqing, 400016, China
| | - Shuangling Sun
- Chongqing Medical and Pharmaceutical College, No. 82, University Town Middle Road, Shapingba District, Chongqing, 400016, China
| | - Changzhu Duan
- Department of Cell Biology and Medical Genetics, Molecular Medicine and Cancer Research Center, Chongqing Medical University, Chongqing, 400016, China.
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Daya NM, Mavrommatis L, Zhuge H, Athamneh M, Roos A, Gläser D, Doering K, Zaehres H, Vorgerd M, Güttsches AK. Generation of a human iPSC line (HIMRi001-A) from a patient with filaminopathy. Stem Cell Res 2023; 72:103210. [PMID: 37748332 DOI: 10.1016/j.scr.2023.103210] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 09/15/2023] [Accepted: 09/19/2023] [Indexed: 09/27/2023] Open
Abstract
Here we introduce the human induced pluripotent stem cell (hiPSC) line HIMRi001-A generated from cultured dermal fibroblasts of a 60-year-old male patient with a myofibrillar myopathy, carrying a heterozygous c.4984C > T [p.Q1662X] mutation in the filamin C (FLNC)-gene, via lentiviral expression of OCT4, SOX2, KLF4 and c-MYC. HIMRi001-A displays typical embryonic stem cell-like morphology, carries the c.4984C > T FLNC gene mutation, expressed several pluripotent stem cell makers, retained normal karyotype (46, XY) and holds the potential to differentiate in all three germ layers. We postulate that HIMRi001-A can be used for the elucidation of FLNC-associated pathomechanisms and for developing new therapeutic options.
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Affiliation(s)
- N M Daya
- Department of Neurology, Heimer Institute for Muscle Research, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - L Mavrommatis
- Department of Neurology, Heimer Institute for Muscle Research, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - H Zhuge
- Department of Neurology, Heimer Institute for Muscle Research, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - M Athamneh
- Department of Neurology, Heimer Institute for Muscle Research, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - A Roos
- Department of Neurology, Heimer Institute for Muscle Research, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - D Gläser
- Genetikum, Center for Human Genetics, 89231 Neu-Ulm, Germany
| | - K Doering
- Department of Human Genetics, Ruhr-University Bochum, 44801 Bochum, Germany
| | - H Zaehres
- Department of Anatomy and Molecular Embryology, Institute of Anatomy, Ruhr-University Bochum, 44801 Bochum, Germany
| | - M Vorgerd
- Department of Neurology, Heimer Institute for Muscle Research, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - A K Güttsches
- Department of Neurology, Heimer Institute for Muscle Research, BG-University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany.
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8
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Monda E, Lioncino M, Caiazza M, Simonelli V, Nesti C, Rubino M, Perna A, Mauriello A, Budillon A, Pota V, Bruno G, Varone A, Nigro V, Santorelli FM, Pacileo G, Russo MG, Frisso G, Sampaolo S, Limongelli G. Clinical, Genetic, and Histological Characterization of Patients with Rare Neuromuscular and Mitochondrial Diseases Presenting with Different Cardiomyopathy Phenotypes. Int J Mol Sci 2023; 24:ijms24109108. [PMID: 37240454 DOI: 10.3390/ijms24109108] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2023] [Revised: 05/15/2023] [Accepted: 05/20/2023] [Indexed: 05/28/2023] Open
Abstract
Cardiomyopathies are mostly determined by genetic mutations affecting either cardiac muscle cell structure or function. Nevertheless, cardiomyopathies may also be part of complex clinical phenotypes in the spectrum of neuromuscular (NMD) or mitochondrial diseases (MD). The aim of this study is to describe the clinical, molecular, and histological characteristics of a consecutive cohort of patients with cardiomyopathy associated with NMDs or MDs referred to a tertiary cardiomyopathy clinic. Consecutive patients with a definitive diagnosis of NMDs and MDs presenting with a cardiomyopathy phenotype were described. Seven patients were identified: two patients with ACAD9 deficiency (Patient 1 carried the c.1240C>T (p.Arg414Cys) homozygous variant in ACAD9; Patient 2 carried the c.1240C>T (p.Arg414Cys) and the c.1646G>A (p.Ar549Gln) variants in ACAD9); two patients with MYH7-related myopathy (Patient 3 carried the c.1325G>A (p.Arg442His) variant in MYH7; Patient 4 carried the c.1357C>T (p.Arg453Cys) variant in MYH7); one patient with desminopathy (Patient 5 carried the c.46C>T (p.Arg16Cys) variant in DES); two patients with mitochondrial myopathy (Patient 6 carried the m.3243A>G variant in MT-TL1; Patient 7 carried the c.253G>A (p.Gly85Arg) and the c.1055C>T (p.Thr352Met) variants in MTO1). All patients underwent a comprehensive cardiovascular and neuromuscular evaluation, including muscle biopsy and genetic testing. This study described the clinical phenotype of rare NMDs and MDs presenting as cardiomyopathies. A multidisciplinary evaluation, combined with genetic testing, plays a main role in the diagnosis of these rare diseases, and provides information about clinical expectations, and guides management.
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Affiliation(s)
- Emanuele Monda
- Inherited and Rare Cardiovascular Disease Unit, Department of Translational Medical Sciences, University of Campania Luigi Vanvitelli, AORN dei Colli, Monaldi Hospital, 81031 Naples, Italy
| | - Michele Lioncino
- Inherited and Rare Cardiovascular Disease Unit, Department of Translational Medical Sciences, University of Campania Luigi Vanvitelli, AORN dei Colli, Monaldi Hospital, 81031 Naples, Italy
| | - Martina Caiazza
- Inherited and Rare Cardiovascular Disease Unit, Department of Translational Medical Sciences, University of Campania Luigi Vanvitelli, AORN dei Colli, Monaldi Hospital, 81031 Naples, Italy
| | | | - Claudia Nesti
- Molecular Medicine, IRCCS Stella Maris Foundation, 56128 Pisa, Italy
| | - Marta Rubino
- Inherited and Rare Cardiovascular Disease Unit, Department of Translational Medical Sciences, University of Campania Luigi Vanvitelli, AORN dei Colli, Monaldi Hospital, 81031 Naples, Italy
| | - Alessia Perna
- Inherited and Rare Cardiovascular Disease Unit, Department of Translational Medical Sciences, University of Campania Luigi Vanvitelli, AORN dei Colli, Monaldi Hospital, 81031 Naples, Italy
| | - Alfredo Mauriello
- Inherited and Rare Cardiovascular Disease Unit, Department of Translational Medical Sciences, University of Campania Luigi Vanvitelli, AORN dei Colli, Monaldi Hospital, 81031 Naples, Italy
| | - Alberta Budillon
- Department of Advanced Medical and Surgical Sciences, 2nd Division of Neurology, Center for Rare Diseases and InterUniversity Center for Research in Neurosciences, University of Campania Luigi Vanvitelli, Via Sergio Pansini, 5, 80131 Naples, Italy
| | - Vincenzo Pota
- NeuroMuscular Omnicentre (NEMO), AORN dei Colli, Monaldi Hospital, 80131 Naples, Italy
| | - Giorgia Bruno
- Pediatric Neurology Unit, Department of Neurosciences, Santobono-Pausilipon Children's Hospital, 80122 Naples, Italy
| | - Antonio Varone
- Pediatric Neurology Unit, Department of Neurosciences, Santobono-Pausilipon Children's Hospital, 80122 Naples, Italy
| | - Vincenzo Nigro
- Department of Precision Medicine, University of Campania Luigi Vanvitelli, Via Luigi De Crecchio 7, 80138 Naples, Italy
- Telethon Institute of Genetics and Medicine, Via Campi Flegrei 34, 80078 Pozzuoli, Italy
| | | | - Giuseppe Pacileo
- Heart Failure Unit, Department of Cardiology, AORN dei Colli, Monaldi Hospital, 80131 Naples, Italy
| | - Maria Giovanna Russo
- Paediatric Cardiology Unit, University of Campania Luigi Vanvitelli, AORN dei Colli, Monaldi Hospital, 81100 Caserta, Italy
| | - Giulia Frisso
- Department of Molecular Medicine and Medical Biotechnology, University of Naples "Federico II", 80138 Naples, Italy
| | - Simone Sampaolo
- Department of Advanced Medical and Surgical Sciences, 2nd Division of Neurology, Center for Rare Diseases and InterUniversity Center for Research in Neurosciences, University of Campania Luigi Vanvitelli, Via Sergio Pansini, 5, 80131 Naples, Italy
| | - Giuseppe Limongelli
- Inherited and Rare Cardiovascular Disease Unit, Department of Translational Medical Sciences, University of Campania Luigi Vanvitelli, AORN dei Colli, Monaldi Hospital, 81031 Naples, Italy
- NeuroMuscular Omnicentre (NEMO), AORN dei Colli, Monaldi Hospital, 80131 Naples, Italy
- Institute of Cardiovascular Sciences, University College of London and St. Bartholomew's Hospital, Gower St, London WC1E 6DD, UK
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9
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Sellung D, Heil L, Daya N, Jacobsen F, Mertens-Rill J, Zhuge H, Döring K, Piran M, Milting H, Unger A, Linke WA, Kley R, Preusse C, Roos A, Fürst DO, Ven PFMVD, Vorgerd M. Novel Filamin C Myofibrillar Myopathy Variants Cause Different Pathomechanisms and Alterations in Protein Quality Systems. Cells 2023; 12:cells12091321. [PMID: 37174721 PMCID: PMC10177260 DOI: 10.3390/cells12091321] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2023] [Revised: 04/28/2023] [Accepted: 05/03/2023] [Indexed: 05/15/2023] Open
Abstract
Myofibrillar myopathies (MFM) are a group of chronic muscle diseases pathophysiologically characterized by accumulation of protein aggregates and structural failure of muscle fibers. A subtype of MFM is caused by heterozygous mutations in the filamin C (FLNC) gene, exhibiting progressive muscle weakness, muscle structural alterations and intracellular protein accumulations. Here, we characterize in depth the pathogenicity of two novel truncating FLNc variants (p.Q1662X and p.Y2704X) and assess their distinct effect on FLNc stability and distribution as well as their impact on protein quality system (PQS) pathways. Both variants cause a slowly progressive myopathy with disease onset in adulthood, chronic myopathic alterations in muscle biopsy including the presence of intracellular protein aggregates. Our analyses revealed that p.Q1662X results in FLNc haploinsufficiency and p.Y2704X in a dominant-negative FLNc accumulation. Moreover, both protein-truncating variants cause different PQS alterations: p.Q1662X leads to an increase in expression of several genes involved in the ubiquitin-proteasome system (UPS) and the chaperone-assisted selective autophagy (CASA) system, whereas p.Y2704X results in increased abundance of proteins involved in UPS activation and autophagic buildup. We conclude that truncating FLNC variants might have different pathogenetic consequences and impair PQS function by diverse mechanisms and to varying extents. Further studies on a larger number of patients are necessary to confirm our observations.
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Affiliation(s)
- Dominik Sellung
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Lorena Heil
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Nassam Daya
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Frank Jacobsen
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Janine Mertens-Rill
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Heidi Zhuge
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Kristina Döring
- Department of Human Genetics, Ruhr-University Bochum, 44801 Bochum, Germany
| | - Misagh Piran
- Erich and Hanna Klessmann Institute, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, 32545 Bad Oeynhausen, Germany
| | - Hendrik Milting
- Erich and Hanna Klessmann Institute, Heart and Diabetes Centre NRW, University Hospital of the Ruhr-University Bochum, 32545 Bad Oeynhausen, Germany
| | - Andreas Unger
- Institute of Physiology II, University of Münster, 48149 Münster, Germany
| | - Wolfgang A Linke
- Institute of Physiology II, University of Münster, 48149 Münster, Germany
| | - Rudi Kley
- Department of Neurology and Clinical Neurophysiology, St. Marien-Hospital Borken, 46325 Borken, Germany
| | - Corinna Preusse
- Department of Neuropathology, Charité-Universitätsmedizin Berlin, 10117 Berlin, Germany
| | - Andreas Roos
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
| | - Dieter O Fürst
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Peter F M van der Ven
- Department of Molecular Cell Biology, Institute for Cell Biology, University of Bonn, 53121 Bonn, Germany
| | - Matthias Vorgerd
- Department of Neurology, Heimer Institute for Muscle Research, University Hospital Bergmannsheil, Ruhr-University Bochum, 44789 Bochum, Germany
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10
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Nicolau S, Dasgupta A, Dasari S, Charlesworth MC, Johnson KL, Pandey A, Doles JD, Milone M. Molecular signatures of inherited and acquired sporadic late onset nemaline myopathies. Acta Neuropathol Commun 2023; 11:20. [PMID: 36703211 PMCID: PMC9878979 DOI: 10.1186/s40478-023-01518-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2022] [Accepted: 01/18/2023] [Indexed: 01/27/2023] Open
Abstract
Acquired sporadic late onset nemaline myopathy (SLONM) and inherited nemaline myopathy (iNM) both feature accumulation of nemaline rods in muscle fibers. Unlike iNM, SLONM is amenable to therapy. The distinction between these disorders is therefore crucial when the diagnosis remains ambiguous after initial investigations. We sought to identify biomarkers facilitating this distinction and to investigate the pathophysiology of nemaline rod formation in these different disorders. Twenty-two muscle samples from patients affected by SLONM or iNM underwent quantitative histological analysis, laser capture microdissection for proteomic analysis of nemaline rod areas and rod-free areas, and transcriptomic analysis. In all iNM samples, nemaline rods were found in subsarcolemmal or central aggregates, whereas they were diffusely distributed within muscle fibers in most SLONM samples. In SLONM, muscle fibers harboring nemaline rods were smaller than those without rods. Necrotic fibers, increased endomysial connective tissue, and atrophic fibers filled with nemaline rods were more common in SLONM. Proteomic analysis detected differentially expressed proteins between nemaline rod areas and rod-free areas, as well as between SLONM and iNM. These differentially expressed proteins implicated immune, structural, metabolic, and cellular processes in disease pathophysiology. Notably, immunoglobulin overexpression with accumulation in nemaline rod areas was detected in SLONM. Transcriptomic analysis corroborated proteomic findings and further revealed substantial gene expression differences between SLONM and iNM. Overall, we identified unique pathological and molecular signatures associated with SLONM and iNM, suggesting distinct underlying pathophysiological mechanisms. These findings represent a step towards enhanced diagnostic tools and towards development of treatments for SLONM.
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Affiliation(s)
- Stefan Nicolau
- grid.66875.3a0000 0004 0459 167XDepartment of Neurology, Mayo Clinic, 200 First St. SW, Rochester, MN 55905 USA ,grid.240344.50000 0004 0392 3476Center for Gene Therapy, Nationwide Children’s Hospital, Columbus, OH 43205 USA
| | - Aneesha Dasgupta
- grid.66875.3a0000 0004 0459 167XDepartment of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN 55905 USA ,grid.257413.60000 0001 2287 3919Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN 46202 USA ,grid.257413.60000 0001 2287 3919Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN 46202 USA
| | - Surendra Dasari
- grid.66875.3a0000 0004 0459 167XDepartment of Quantitative Health Sciences, Mayo Clinic, Rochester, MN 55905 USA
| | - M. Cristine Charlesworth
- grid.66875.3a0000 0004 0459 167XProteomics Core, Medical Genomics Facility, Mayo Clinic, Rochester, MN 55905 USA
| | - Kenneth L. Johnson
- grid.66875.3a0000 0004 0459 167XProteomics Core, Medical Genomics Facility, Mayo Clinic, Rochester, MN 55905 USA
| | - Akhilesh Pandey
- grid.66875.3a0000 0004 0459 167XDepartment of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN 55905 USA ,grid.411639.80000 0001 0571 5193Manipal Academy of Higher Education (MAHE), Manipal, Karnataka 576104 India
| | - Jason D. Doles
- grid.66875.3a0000 0004 0459 167XDepartment of Biochemistry and Molecular Biology, Mayo Clinic, Rochester, MN 55905 USA ,grid.257413.60000 0001 2287 3919Department of Anatomy, Cell Biology and Physiology, Indiana University School of Medicine, Indianapolis, IN 46202 USA ,grid.257413.60000 0001 2287 3919Indiana Center for Musculoskeletal Health, Indiana University School of Medicine, Indianapolis, IN 46202 USA
| | - Margherita Milone
- grid.66875.3a0000 0004 0459 167XDepartment of Neurology, Mayo Clinic, 200 First St. SW, Rochester, MN 55905 USA
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11
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Savarese M, Jokela M, Udd B. Distal myopathy. HANDBOOK OF CLINICAL NEUROLOGY 2023; 195:497-519. [PMID: 37562883 DOI: 10.1016/b978-0-323-98818-6.00002-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 08/12/2023]
Abstract
Distal myopathies are a group of genetic, primary muscle diseases. Patients develop progressive weakness and atrophy of the muscles of forearm, hands, lower leg, or feet. Currently, over 20 different forms, presenting a variable age of onset, clinical presentation, disease progression, muscle involvement, and histological findings, are known. Some of them are dominant and some recessive. Different variants in the same gene are often associated with either dominant or recessive forms, although there is a lack of a comprehensive understanding of the genotype-phenotype correlations. This chapter provides a description of the clinicopathologic and genetic aspects of distal myopathies emphasizing known etiologic and pathophysiologic mechanisms.
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Affiliation(s)
- Marco Savarese
- Folkhälsan Research Center, Helsinki, Finland; Department of Medical Genetics, Medicum, University of Helsinki, Helsinki, Finland
| | - Manu Jokela
- Neuromuscular Research Center, Department of Neurology, Tampere University and University Hospital, Tampere, Finland; Division of Clinical Neurosciences, Department of Neurology, Turku University Hospital, Turku, Finland
| | - Bjarne Udd
- Folkhälsan Research Center, Helsinki, Finland; Department of Medical Genetics, Medicum, University of Helsinki, Helsinki, Finland; Neuromuscular Research Center, Department of Neurology, Tampere University and University Hospital, Tampere, Finland; Department of Neurology, Vaasa Central Hospital, Vaasa, Finland.
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12
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Muravyev A, Vershinina T, Tesner P, Sjoberg G, Fomicheva Y, Čajbiková NN, Kozyreva A, Zhuk S, Mamaeva E, Tarnovskaya S, Jornholt J, Sokolnikova P, Pervunina T, Vasichkina E, Sejersen T, Kostareva A. Rare clinical phenotype of filaminopathy presenting as restrictive cardiomyopathy and myopathy in childhood. Orphanet J Rare Dis 2022; 17:358. [PMID: 36104822 PMCID: PMC9476594 DOI: 10.1186/s13023-022-02477-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Accepted: 08/13/2022] [Indexed: 11/10/2022] Open
Abstract
Background FLNC is one of the few genes associated with all types of cardiomyopathies, but it also underlies neuromuscular phenotype. The combination of concomitant neuromuscular and cardiac involvement is not often observed in filaminopathies and the impact of this on the disease prognosis has hitherto not been analyzed. Results Here we provide a detailed clinical, genetic, and structural prediction analysis of distinct FLNC-associated phenotypes based on twelve pediatric cases. They include early-onset restrictive cardiomyopathy (RCM) in association with congenital myopathy. In all patients the initial diagnosis was established during the first year of life and in five out of twelve (41.7%) patients the first symptoms were observed at birth. RCM was present in all patients, often in combination with septal defects. No ventricular arrhythmias were noted in any of the patients presented here. Myopathy was confirmed by neurological examination, electromyography, and morphological studies. Arthrogryposes was diagnosed in six patients and remained clinically meaningful with increasing age in three of them. One patient underwent successful heart transplantation at the age of 18 years and two patients are currently included in the waiting list for heart transplantation. Two died due to congestive heart failure. One patient had ICD instally as primary prevention of SCD. In ten out of twelve patients the disease was associated with missense variants and only in two cases loss of function variants were detected. In half of the described cases, an amino acid substitution A1186V, altering the structure of IgFLNc10, was found. Conclusions The present description of twelve cases of early-onset restrictive cardiomyopathy with congenital myopathy and FLNC mutation, underlines a distinct unique phenotype that can be suggested as a separate clinical form of filaminopathies. Amino acid substitution A1186V, which was observed in half of the cases, defines a mutational hotspot for the reported combination of myopathy and cardiomyopathy. Several independent molecular mechanisms of FLNC mutations linked to filamin structure and function can explain the broad spectrum of FLNC-associated phenotypes. Early disease presentation and unfavorable prognosis of heart failure demanding heart transplantation make awareness of this clinical form of filaminopathy of great clinical importance. Supplementary Information The online version contains supplementary material available at 10.1186/s13023-022-02477-5.
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13
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Naddaf E, Dasari S, Selcen D, Charlesworth MC, Johnson KL, Mauermann ML, Kourelis T. Proteomic profiling of sporadic late-onset nemaline myopathy. Ann Clin Transl Neurol 2022; 9:391-402. [PMID: 35187860 PMCID: PMC8935314 DOI: 10.1002/acn3.51527] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2022] [Accepted: 02/04/2022] [Indexed: 11/08/2022] Open
Abstract
Objective To define the proteomic profile of sporadic late‐onset nemaline myopathy (SLONM) and explore its pathogenesis. Methods We performed mass spectrometry on laser‐dissected frozen muscle samples from five patients with SLONM, three of whom with an associated monoclonal protein (MP), and four controls, to determine the proteomic profile of SLONM. Furthermore, we assessed the role of the MP by evaluating the expression of the immunoglobulin light chain variable regions (IGVL). Results There were 294 differentially expressed proteins: 272 upregulated and 22 downregulated. Among the top 100 upregulated proteins, the most common categories were: nuclear or nucleic acid metabolism (24%), extracellular matrix and basal lamina (17%), immune response (13%), and actin dynamics (8%). Downregulated proteins consisted mostly of contractile proteins. Among upregulated proteins, there were 65 with a role related to the immune system, including eight proteins involved in major histocompatibility complex 1 (MHC1) and antigen processing, 15 in MHCII complex and phagocytosis, and 23 in B and/or T‐cell function. Among nine upregulated immunoglobulin proteins, there were two IGVL genes. However, these were also detected in SLONM cases without an MP, with no evidence of clonally dominant immunoglobulin deposition. In muscle sections from SLONM patients, nemaline rods tended to accumulate in atrophic fibers with marked rarefaction of the myofibrils. Increased MHC1 reactivity was present in fibers containing nemaline rods as well as adjacent nonatrophic fibers. Conclusion Our findings suggest that aberrant immune activation is present in SLONM, but do not support a direct causal relationship between the MP and SLONM.
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Affiliation(s)
- Elie Naddaf
- Division of Neuromuscular Medicine, Department of Neurology, Mayo Clinic, Rochester, Minnesota, USA
| | - Surendra Dasari
- Department of Qualitative Health Sciences, Mayo Clinic, Rochester, Minnesota, USA
| | - Duygu Selcen
- Division of Neuromuscular Medicine, Department of Neurology, Mayo Clinic, Rochester, Minnesota, USA
| | | | - Kenneth L Johnson
- Medical Genome Facility Proteomics Core, Mayo Clinic, Rochester, Minnesota, USA
| | - Michelle L Mauermann
- Division of Neuromuscular Medicine, Department of Neurology, Mayo Clinic, Rochester, Minnesota, USA
| | - Taxiarchis Kourelis
- Division of Hematology, Department of Internal Medicine, Mayo Clinic, Rochester, Minnesota, USA
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14
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Gangfuß A, Schara-Schmidt U, Roos A. [Genomics and proteomics in the research of neuromuscular diseases]. DER NERVENARZT 2021; 93:114-121. [PMID: 34622318 DOI: 10.1007/s00115-021-01201-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 09/04/2021] [Indexed: 11/30/2022]
Abstract
Neurological diseases affect 3-5% of children and, apart from cardiovascular diseases and cancer, represent the most prominent cause of morbidity and mortality in adults and particularly in the aged population of western Europe. Neuromuscular disorders are a subgroup of neurological diseases and often have a genetic origin, which leads to familial clustering. Despite the enormous progress in the analysis of the genome, such as by sequence analysis of coding regions of deoxyribonucleic acid or even the entire deoxyribonucleic acid sequence, in approximately 50% of the patients suffering from rare forms of neurological diseases the genetic cause remains unsolved. The reasons for this limited detection rate are presented in this article. If a treatment concept is available, under certain conditions this can have an impact on the adequate and early treatment of these patients. Considering neuromuscular disorders as a paradigm, this article reports on the advantages of the inclusion of next generation sequencing analysis-based DNA investigations as an omics technology (genomics) and the advantage of the integration with protein analyses (proteomics). A special focus is on the combination of genomics and proteomics in the sense of a proteogenomic approach in the diagnostics and research of these diseases. Along this line, this article presents a proteogenomic approach in the context of a multidisciplinary project aiming towards improved diagnostic work-up and future treatment of patients with neuromuscular diseases; "NMD-GPS: gene and protein signatures as a global positioning system in patients suffering from neuromuscular diseases".
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Affiliation(s)
- Andrea Gangfuß
- Abteilung für Neuropädiatrie, Universitätsmedizin Essen, Hufelandstrasse 55, 45147, Essen, Deutschland
| | - Ulrike Schara-Schmidt
- Abteilung für Neuropädiatrie, Universitätsmedizin Essen, Hufelandstrasse 55, 45147, Essen, Deutschland
| | - Andreas Roos
- Abteilung für Neuropädiatrie, Universitätsmedizin Essen, Hufelandstrasse 55, 45147, Essen, Deutschland. .,Children's Hospital of Eastern Ontario Research Institute, University of Ottawa, Ottawa, Kanada.
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15
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Liewluck T. A Window Into the Myofibrillar Myopathy Proteome. Neurol Genet 2021; 7:e587. [PMID: 34084941 PMCID: PMC8170776 DOI: 10.1212/nxg.0000000000000587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Teerin Liewluck
- Division of Neuromuscular Medicine and Muscle Laboratory, Department of Neurology, Mayo Clinic, Rochester, MN
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