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5 results on '"MESH: Loss of Function Mutation"'

1. Human T-bet Governs Innate and Innate-like Adaptive IFN-γ Immunity against Mycobacteria

Author

Laurent Abel, Laurie H. Glimcher, Lluis Quintana-Murci, Nico Marr, Fatima Al Ali, Jean Marc Doisne, David Langlais, Jacinta Bustamante, Marc Weisshaar, Jing Han, Jamila El Baghdadi, Frédéric Batteux, Manon Roynard, Yichao Shen, Mathieu Bourgey, Flore Rozenberg, Federica Sallusto, Peng Zhang, David Jarrossay, Carmen Oleaga-Quintas, Jean-Laurent Casanova, Daniela Latorre, Gaspard Kerner, Mahbuba Rahman, Houda Elarabi, Federico Mele, Yoann Seeleuthner, James P. Di Santo, Stuart G. Tangye, Michael S. Kobor, Janet Markle, Dusan Bogunovic, Stéphanie Boisson-Dupuis, Julia L. Maclsaac, Lucas T. Husquin, Lisa Worley, Conor Gruber, Cindy S. Ma, Jérémie Rosain, Taushif Khan, Thomas L. Carroll, Mohamed Jeljeli, Abderrahmane Errami, Anne Puel, Qiang Pan-Hammarström, Philippe Gros, Ibithal Benhsaien, Aziz Bousfiha, Fatima Ailal, Carys A. Croft, Rui Yang, Masato Ogishi, Rockefeller University [New York], Università della Svizzera italiana = University of Italian Switzerland (USI), Garvan Institute of medical research, McGill University = Université McGill [Montréal, Canada], Laboratory of Human Genetics of Infectious Diseases (Necker Branch - INSERM U1163), Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Necker - Enfants Malades [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Imagine - Institut des maladies génétiques (IHU) (Imagine - U1163), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Cité (UPCité), Université Hassan II [Casablanca] (UH2MC), Immunité Innée - Innate Immunity, Institut Pasteur [Paris] (IP)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Paris Cité (UPCité), Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich] (ETH Zürich), Icahn School of Medicine at Mount Sinai [New York] (MSSM), We thank the patients and families, members of the laboratory, Cecilia Lindestam Arlehamn and Alessandro Sette, NIH Tetramer Core Facility (NTCF), James McCluskey, Jamie Rossjohn, and David Fairlie, the Genomics and the Flow Cytometry Resource Center of Rockefeller University, National Center for Advancing Translational Sciences of the National Institutes of Health (UL1TR001866 to Rockefeller University), Steven Elledge, National Institute of Allergy and Infectious Diseases (R37AI095983 to J.L.C. and U19AI118626 to F.S.), Sackler Center for Biomedicine and Nutrition at the Center for Clinical and Translational Science (CCTS), Shapiro-Silverberg Fund for the Advancement of Translational Research at CCTS, Rockefeller University (to R.Y.), Research Grant Program of the Immune Deficiency Foundation (to R.Y.), Integrative Biology of Emerging Infectious Diseases Laboratory of Excellence (ANR-10-LABX-62-IBEID), French National Research Agency under the 'Investments for the future' program (ANR-10-IAHU-01), ANR-GENMSMD (ANR-16-CE17-0005-01 to J.B.), ANR-LTh-MSMD-CMCD (ANR-18-CE93-0008-01 to A.P and F.S.), Fonds de Recherche en Santé Respiratoire (SRC2017 to J.B.), French Foundation for Medical Research (FRM) (EQU201903007798), the SCOR Corporate Foundation for Science, ECOS Nord (C19S01-63407 to J.B.), Swiss National Science Foundation (310030L_182728 to F.S.), French Foundation for Medical Research (FRM) (EQU201903007798), Helmut Horten Foundation, Canadian Center for Computational Genomics (C3G), Genomics Technology Platform (GTP), and Genome Canada. J. R. was supported by INSERM Poste d’accueil and and Imagine Institute, T.K. by Qatar National Research Fund (PPM1-1220-150017). S.G.T. by Program grant (1113904), Principal Research Fellowship (1042925), and Leadership 3 Investigator grant (1176665) from the National Health and Medical Research Council of Australia, C.S.M. by an Early/Mid-Career Development Research Fellowship, Ministry of Health, NSW Government, R.Y. by Stony Wold-Herbert Fund., ANR-10-LABX-0062,IBEID,Integrative Biology of Emerging Infectious Diseases(2010), ANR-10-IAHU-0001,Imagine,Institut Hospitalo-Universitaire Imagine(2010), ANR-16-CE17-0005,GENMSMD,Dissection génétique de la Susceptibilité Mendélienne aux infections mycobactériennes chez l'homme(2016), ANR-18-CE93-0008,LTh-MSMD-CMCD,Différenciation des lymphocytes T-helper (Th) dans les défauts génétiques de l'immunité contre Mycobacterium et/ou Candida species.(2018), Garvan Institute of Medical Research [Darlinghurst, Australia], Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Paris (UP), Institut Pasteur [Paris]-Institut National de la Santé et de la Recherche Médicale (INSERM), and Université de Paris (UP)

Subjects
Male, inborn errors of immunity, [SDV]Life Sciences [q-bio], Mendelian susceptibility to mycobacterial disease, MESH: Amino Acid Sequence, Adaptive Immunity, MESH: Base Sequence, Epigenesis, Genetic, mycobacterium, MESH: INDEL Mutation, 0302 clinical medicine, MESH: DNA Methylation, INDEL Mutation, Loss of Function Mutation, Interferon gamma, MESH: Epigenesis, Genetic, MESH: CpG Islands, IFN-γ, Immunodeficiency, 0303 health sciences, biology, MESH: Dendritic Cells, Homozygote, T-Lymphocytes, Helper-Inducer, MESH: Infant, Chromatin, Pedigree, 3. Good health, Killer Cells, Natural, Child, Preschool, [SDV.IMM]Life Sciences [q-bio]/Immunology, Female, MESH: Immunity, Innate, medicine.drug, MESH: Homozygote, MESH: Killer Cells, Natural, MESH: Pedigree, MESH: T-Box Domain Proteins, MESH: Interferon-gamma, T-bet, Article, General Biochemistry, Genetics and Molecular Biology, MESH: Chromatin, Interferon-gamma, 03 medical and health sciences, Immunity, medicine, MESH: Mycobacterium, Humans, Cell Lineage, Amino Acid Sequence, MESH: Mycobacterium Infections, MESH: T-Lymphocytes, Helper-Inducer, Transcription factor, 030304 developmental biology, Mycobacterium Infections, MESH: Humans, Base Sequence, MESH: Transcriptome, MESH: Child, Preschool, Infant, MESH: Loss of Function Mutation, Dendritic Cells, DNA Methylation, Mycobacterial disease, MESH: Cell Lineage, medicine.disease, biology.organism_classification, Immunity, Innate, MESH: Male, innate-like adaptive lymphocyte, Mycobacterial antigen, Immunology, CpG Islands, innate lymphocyte, T-Box Domain Proteins, Transcriptome, immunodeficiency, MESH: Female, 030217 neurology & neurosurgery, CD8, MESH: Adaptive Immunity, Mycobacterium
Abstract

International audience; Inborn errors of human interferon gamma (IFN-γ) immunity underlie mycobacterial disease. We report a patient with mycobacterial disease due to inherited deficiency of the transcription factor T-bet. The patient has extremely low counts of circulating Mycobacterium-reactive natural killer (NK), invariant NKT (iNKT), mucosal-associated invariant T (MAIT), and Vδ2+ γδ T lymphocytes, and of Mycobacterium-non reactive classic TH1 lymphocytes, with the residual populations of these cells also producing abnormally small amounts of IFN-γ. Other lymphocyte subsets develop normally but produce low levels of IFN-γ, with the exception of CD8+ αβ T and non-classic CD4+ αβ TH1∗ lymphocytes, which produce IFN-γ normally in response to mycobacterial antigens. Human T-bet deficiency thus underlies mycobacterial disease by preventing the development of innate (NK) and innate-like adaptive lymphocytes (iNKT, MAIT, and Vδ2+ γδ T cells) and IFN-γ production by them, with mycobacterium-specific, IFN-γ-producing, purely adaptive CD8+ αβ T, and CD4+ αβ TH1∗ cells unable to compensate for this deficit.

Published
2020

2. A Loss-of-Function Mutation in the Integrin Alpha L ( Itgal ) Gene Contributes to Susceptibility to Salmonella enterica Serovar Typhimurium Infection in Collaborative Cross Strain CC042

Author

Jing Zhang, Rachel Meade, Megan Teh, Danielle Malo, Anastasia Nijnik, Jean Jaubert, Xavier Montagutelli, Megan M. Eva, Jamie Kim, Romain Cayrol, Génétique de la souris - Mouse Genetics, Institut Pasteur [Paris] (IP), McGill University Research Centre on Complex Traits [Montreal] (MRCCT), McGill University = Université McGill [Montréal, Canada], Université de Montréal (UdeM), D.M. is the recipient of a Canadian Institutes of Health Research (CIHR) project grant (grant MOP133700) and a Natural Sciences and Engineering Research Council (NSERC) discovery grant (grant RGPIN-2017-04717). A.N. is a Canada Research Chair Tier II in Hematopoiesis and Lymphocyte Differentiation and the recipient of CIHR project grant PJT-153016 and NSERC discovery grant RGPIN-2016-05657. Funding had been provided to M.T. by an NSERC Undergraduate Student Research Award and the Fonds de Recherche du Québec Nature et Technologies and to J.K. by the McGill Faculty of Medicine Solvay Fellowship. The flow cytometry work/cell sorting was performed in the Flow Cytometry Core Facility for flow cytometry and single cell analysis of the Life Science Complex (McGill University) and was supported by funding from the Canadian Foundation for Innovation. This study was also supported by AgroParisTech (France) through a Ph.D. fellowship to J.Z., We thank Line Larivière and Hyejin Park for technical assistance and Patricia D’Arcy (McGill University) and Isabelle Lanctin and Tommy Penel (DTPS/C2RA-Central Animal Facility, Institut Pasteur) for mouse breeding and screening., and Institut Pasteur [Paris]

Subjects
0301 basic medicine, QTL mapping, Salmonella, MESH: Spleen, Immunology, Integrin Alpha-L, MESH: Lymphocyte Subsets, Spleen, MESH: CD11a Antigen, medicine.disease_cause, MESH: Bacterial Load, Microbiology, host resistance, 03 medical and health sciences, 0302 clinical medicine, immunophenotyping, MESH: Mice, Inbred C57BL, medicine, Splenocyte, MESH: Animals, MESH: Bacteremia, Gene, MESH: Mice, [SDV.GEN]Life Sciences [q-bio]/Genetics, MESH: Salmonella Infections, biology, MESH: Genetic Predisposition to Disease, MESH: Salmonella typhimurium, MESH: Loss of Function Mutation, MESH: Serogroup, MESH: Thymus Gland, biology.organism_classification, MESH: Genes, 3. Good health, Complementation, 030104 developmental biology, Infectious Diseases, medicine.anatomical_structure, Salmonella enterica, MESH: Survival Analysis, Parasitology, MESH: Bone Marrow, MESH: Disease Models, Animal, CD8, 030215 immunology
Abstract

International audience; Salmonella is an intracellular bacterium found in the gastrointestinal tract of mammalian, avian, and reptilian hosts. Mouse models have been extensively used to model in vivo distinct aspects of human Salmonella infections and have led to the identification of several host susceptibility genes. We have investigated the susceptibility of Collaborative Cross strains to intravenous infection with Salmonella enterica serovar Typhimurium as a model of human systemic invasive infection. In this model, strain CC042/GeniUnc (CC042) mice displayed extreme susceptibility with very high bacterial loads and mortality. CC042 mice showed lower spleen weights and decreased splenocyte numbers before and after infection, affecting mostly CD8+ T cells, B cells, and all myeloid cell populations, compared with control C57BL/6J mice. CC042 mice also had lower thymus weights with a reduced total number of thymocytes and double-negative and double-positive (CD4+, CD8+) thymocytes compared to C57BL/6J mice. Analysis of bone marrow-resident hematopoietic progenitors showed a strong bias against lymphoid-primed multipotent progenitors. An F2 cross between CC042 and C57BL/6N mice identified two loci on chromosome 7 (Stsl6 and Stsl7) associated with differences in bacterial loads. In the Stsl7 region, CC042 carried a loss-of-function variant, unique to this strain, in the integrin alpha L (Itgal) gene, the causative role of which was confirmed by a quantitative complementation test. Notably, Itgal loss of function increased the susceptibility to S. Typhimurium in a (C57BL/6J × CC042)F1 mouse background but not in a C57BL/6J mouse inbred background. These results further emphasize the utility of the Collaborative Cross to identify new host genetic variants controlling susceptibility to infections and improve our understanding of the function of the Itgal gene.

Published
2019

3. Characterization of Kcnk3 -Mutated Rat, a Novel Model of Pulmonary Hypertension

Author

Thomas Bertero, Catherine Rucker-Martin, David Montani, Laurent Tesson, Marc Humbert, Fabrice Antigny, Frédéric Perros, Séverine Remy, Véronique Capuano, Barbara Girerd, Ignacio Anegon, Boris Manoury, Christine Péchoux, Olaf Mercier, Mélanie Lambert, Valérie Domergue, Morad K. Nakhleh, Aurélie Hautefort, Angèle Boet, Centre chirurgical Marie Lannelongue, Université Paris-Sud - Paris 11 - Faculté de médecine (UP11 UFR Médecine), Université Paris-Sud - Paris 11 (UP11), Centre de Recherche en Transplantation et Immunologie (U1064 Inserm - CRTI), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Nantes - UFR de Médecine et des Techniques Médicales (UFR MEDECINE), Université de Nantes (UN)-Université de Nantes (UN), Biologie et physiopathologie cutanées : expression génique, signalisation et thérapie, Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-IFR50-Institut National de la Santé et de la Recherche Médicale (INSERM), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA), Centre National de la Recherche Scientifique (CNRS), Unité de recherche génomique et physiologie de la lactation (GPL), Institut National de la Recherche Agronomique (INRA), Hypertension arterielle pulmonaire physiopathologie et innovation thérapeutique, Centre chirurgical Marie Lannelongue-Institut National de la Santé et de la Recherche Médicale (INSERM), Détoxication et réparation tissulaire, Université de Rennes 1 (UR1), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Chirurgical Marie Lannelongue (CCML), ANR-18-CE14-0025,MatriPHate,Comprendre la dynamique de la niche vasculaire dans l'hypertension pulmonaire.(2018), Université Paris-Sud 11 - Faculté de médecine (UP11 UFR Médecine), Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-IFR50-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Côte d'Azur (UCA), Génomique et Physiologie de la Lactation (GPL), Université de Rennes (UNIV-RENNES)-Université de Rennes (UNIV-RENNES)-IFR140-Institut National de la Santé et de la Recherche Médicale (INSERM), ANR-18-CE14-0025,MATRIPHATE,UNDERSTANDING THE DYNAMIC OF THE VASCULAR NICHE IN PULMONARY HYPERTENSION (PH). MATRIX REPROGRAMMING FORCES PH.(2018), Université Nice Sophia Antipolis (1965 - 2019) (UNS), Centre Chirurgical Marie Lannelongue (CCML)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université de Rennes (UR)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Paris-Saclay, Hôpital Bicêtre, Adhésion et Inflammation (LAI), Aix Marseille Université (AMU)-Assistance Publique - Hôpitaux de Marseille (APHM)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre de Recherche en Transplantation et Immunologie - Center for Research in Transplantation and Translational Immunology (U1064 Inserm - CR2TI), Institut National de la Santé et de la Recherche Médicale (INSERM)-Nantes Université - UFR de Médecine et des Techniques Médicales (Nantes Univ - UFR MEDECINE), Nantes Université - pôle Santé, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ)-Nantes Université - pôle Santé, Nantes Université (Nantes Univ)-Nantes Université (Nantes Univ), Transgenic Rats and Immunophenomics Platform, Partenaires INRAE, Institut de pharmacologie moléculaire et cellulaire (IPMC), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Centre National de la Recherche Scientifique (CNRS)-Université Côte d'Azur (UCA), Génétique Animale et Biologie Intégrative (GABI), AgroParisTech-Université Paris-Saclay-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Signalisation et physiopathologie cardiovasculaire (CARPAT), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris-Saclay, Ingénierie et Plateformes au Service de l'Innovation Thérapeutique (IPSIT), Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut Universitaire de Cardiologie et de Pneumologie de Québec (IUCPQ), Université Laval [Québec] (ULaval), Fondation du Souffle et Fonds de Dotation Recherche en Sante Respiratoire from the Fondation Lefoulon-Delalande, Fondation Legs Poix, Therapeutic Innovation Doctoral SchoolED569, ANR-18-CE14-0023,KAPAH,KCNK3 une nouvelle cible thérapeutique dans l'hypertension artérielle pulmonaire(2018), Bertero, Thomas, APPEL À PROJETS GÉNÉRIQUE 2018 - Comprendre la dynamique de la niche vasculaire dans l'hypertension pulmonaire. - - MatriPHate2018 - ANR-18-CE14-0025 - AAPG2018 - VALID, Antigny, Fabrice, and APPEL À PROJETS GÉNÉRIQUE 2018 - KCNK3 une nouvelle cible thérapeutique dans l'hypertension artérielle pulmonaire - - KAPAH2018 - ANR-18-CE14-0023 - AAPG2018 - VALID

Subjects
0301 basic medicine, [SDV.BA] Life Sciences [q-bio]/Animal biology, Physiology, [SDV]Life Sciences [q-bio], [SDV.GEN] Life Sciences [q-bio]/Genetics, MESH: Rats, Sprague-Dawley, 030204 cardiovascular system & hematology, Extracellular matrix, Exon, 0302 clinical medicine, echocardiography, MESH: Animals, exon, MESH: von Willebrand Factor, MESH: Nerve Tissue Proteins, MESH: Action Potentials, ComputingMilieux_MISCELLANEOUS, Cardiopulmonary disease, education.field_of_study, Potassium channel subfamily K member 3, [SDV.BA]Life Sciences [q-bio]/Animal biology, MESH: Potassium Channels, Tandem Pore Domain, MESH: Blood Pressure, MESH: Muscle, Smooth, Vascular, 3. Good health, [SDV] Life Sciences [q-bio], MESH: Vasoconstriction, medicine.symptom, Cardiology and Cardiovascular Medicine, MESH: Mitogen-Activated Protein Kinase 3, MESH: Nitric Oxide Synthase Type III, MESH: Mitogen-Activated Protein Kinase 1, MESH: Rats, extracellular matrix, MESH: Hypoxia-Inducible Factor 1, alpha Subunit, 03 medical and health sciences, medicine, MESH: Lung, MESH: Survivin, education, Gene, Loss function, [SDV.GEN]Life Sciences [q-bio]/Genetics, MESH: Hypertension, Pulmonary, hypoxia, business.industry, MESH: Loss of Function Mutation, Hypoxia (medical), medicine.disease, Pulmonary hypertension, MESH: Male, rats, 030104 developmental biology, Cancer research, MESH: Disease Models, Animal, business, MESH: Female
Abstract

Rationale: Pulmonary arterial hypertension is a severe lethal cardiopulmonary disease. Loss of function mutations in KCNK3 (potassium channel subfamily K member 3) gene, which encodes an outward rectifier K + channel, have been identified in pulmonary arterial hypertension patients. Objective: We have demonstrated that KCNK3 dysfunction is common to heritable and nonheritable pulmonary arterial hypertension and to experimental pulmonary hypertension (PH). Finally, KCNK3 is not functional in mouse pulmonary vasculature. Methods and Results: Using CRISPR/Cas9 technology, we generated a 94 bp out of frame deletion in exon 1 of Kcnk3 gene and characterized these rats at the electrophysiological, echocardiographic, hemodynamic, morphological, cellular, and molecular levels to decipher the cellular mechanisms associated with loss of KCNK3. Using patch-clamp technique, we validated our transgenic strategy by demonstrating the absence of KCNK3 current in freshly isolated pulmonary arterial smooth muscle cells from Kcnk3 -mutated rats. At 4 months of age, echocardiographic parameters revealed shortening of the pulmonary artery acceleration time associated with elevation of the right ventricular systolic pressure. Kcnk3 -mutated rats developed more severe PH than wild-type rats after monocrotaline exposure or chronic hypoxia exposure. Kcnk3 -mutation induced a lung distal neomuscularization and perivascular extracellular matrix activation. Lungs of Kcnk3 -mutated rats were characterized by overactivation of ERK1/2 (extracellular signal–regulated kinase1-/2), AKT (protein kinase B), SRC, and overexpression of HIF1-α (hypoxia-inducible factor-1 α), survivin, and VWF (Von Willebrand factor). Linked with plasma membrane depolarization, reduced endothelial-NOS expression and desensitization of endothelial-derived hyperpolarizing factor, Kcnk3 -mutated rats presented predisposition to vasoconstriction of pulmonary arteries and a severe loss of sildenafil-induced pulmonary arteries relaxation. Moreover, we showed strong alteration of right ventricular cardiomyocyte excitability. Finally, Kcnk3 -mutated rats developed age-dependent PH associated with low serum-albumin concentration. Conclusions: We established the first Kcnk3 -mutated rat model of PH. Our results confirm that KCNK3 loss of function is a key event in pulmonary arterial hypertension pathogenesis. This model presents new opportunities for understanding the initiating mechanisms of PH and testing biologically relevant therapeutic molecules in the context of PH.

Published
2019

4. Recessive loss of function PIGN alleles, including an intragenic deletion with founder effect in La Réunion Island, in patients with Fryns syndrome

Author

Asma Chebil, Duksha Ramful, Thibaud Jouan, Hanitra Randrianaivo, Norbert F. Ajeawung, Nicolas Gruchy, Yannis Duffourd, Bérénice Doray, Christopher T. Gordon, Francesca Filippini, Christine Bole-Feysot, Philippe M. Campeau, Asma Omarjee, Julien Thevenon, Paul Kuentz, Jean-Luc Alessandri, Patrick Nitschke, Laurence Faivre, Jeanne Amiel, Coralie Dumont, Thi Tuyet Mai Nguyen, Marion Gérard, Myriam Oufadem, Guillaume Benoist, Olivier Alibeu, Marie-Line Jacquemont, Centre Hospitalier Universitaire de La Réunion (CHU La Réunion), Imagine - Institut des maladies génétiques (IMAGINE - U1163), Centre National de la Recherche Scientifique (CNRS)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Sud Saint Pierre [Ile de la Réunion], Service de Génétique [CHU Caen], Université de Caen Normandie (UNICAEN), Normandie Université (NU)-Normandie Université (NU)-CHU Caen, Normandie Université (NU)-Tumorothèque de Caen Basse-Normandie (TCBN)-Tumorothèque de Caen Basse-Normandie (TCBN), Centre de recherche du CHU Sainte-Justine, CHU Sainte Justine [Montréal], Centre Hospitalier de Mayotte, Equipe GAD (LNC - U1231), Lipides - Nutrition - Cancer [Dijon - U1231] (LNC), Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, Université de Bourgogne (UB)-Institut National de la Santé et de la Recherche Médicale (INSERM)-AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement, FHU TRANSLAD, Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), Laboratoire de Génétique Médicale (LGM), Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM), Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre de recherche du CHU Sainte-Justine [Montreal], Université de Montréal (UdeM)-CHU Sainte Justine [Montréal], Service de réanimation néonatologique et pédiatrique [La Réunion], Groupe Hospitalier Sud-CHR La réunion, Embryology and genetics of human malformation (Equipe Inserm U1163), Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), Génétique et épigénétique des maladies métaboliques, neurosensorielles et du développement (Inserm U781), Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM), CHU Caen, Normandie Université (NU)-Tumorothèque de Caen Basse-Normandie (TCBN)-Normandie Université (NU)-Tumorothèque de Caen Basse-Normandie (TCBN)-Université de Caen Normandie (UNICAEN), Normandie Université (NU), Biologie, génétique et thérapies ostéoarticulaires et respiratoires (BIOTARGEN), Normandie Université (NU)-Normandie Université (NU), Pôle Gynécologie Obstétrique [CHM, Mayotte], Centre de génétique - Centre de référence des maladies rares, anomalies du développement et syndromes malformatifs (CHU de Dijon), Hôpital d'Enfants [CHU Dijon], Hôpital du Bocage, Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon)-Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), Pôle Femme-Mère-Enfant [CHU La Réunion, Saint-Pierre, La Réunion], Plateforme de génomique [SFR Necker], Structure Fédérative de Recherche Necker (SFR Necker - UMS 3633 / US24), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Plate Forme Paris Descartes de Bioinformatique (BIP-D), Université Paris Descartes - Paris 5 (UPD5), CHU Necker - Enfants Malades [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Biologie moléculaire et cellulaire de la différenciation, Université Joseph Fourier - Grenoble 1 (UJF)-Institut Albert Bonniot-Institut National de la Santé et de la Recherche Médicale (INSERM), Centre Hospitalier Universitaire de La Réunion ( CHU La Réunion ), Imagine - Institut des maladies génétiques ( IMAGINE - U1163 ), Centre National de la Recherche Scientifique ( CNRS ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Université Paris Descartes - Paris 5 ( UPD5 ), Service de Génétique Clinique [Caen], Université de Caen Normandie ( UNICAEN ), Normandie Université ( NU ) -Normandie Université ( NU ) -CHU Caen, Lipides - Nutrition - Cancer [Dijon - U1231] ( LNC ), Université de Bourgogne ( UB ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Santé et de la Recherche Médicale ( INSERM ) -Université de Bourgogne ( UB ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Santé et de la Recherche Médicale ( INSERM ), Université de Bourgogne ( UB ) -AgroSup Dijon - Institut National Supérieur des Sciences Agronomiques, de l'Alimentation et de l'Environnement-Institut National de la Santé et de la Recherche Médicale ( INSERM ), Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand ( CHU Dijon ), Laboratoire de Génétique Médicale ( LGM ), Université de Strasbourg ( UNISTRA ) -Institut National de la Santé et de la Recherche Médicale ( INSERM ), Service de Réanimation Néonatale et Pédiatrique, CHD Félix Guyon, Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology in Zürich [Zürich] (ETH Zürich), Université de Lausanne (UNIL), Laboratoire de Chimie Physique Macromoléculaire (LCPM), Université de Lorraine (UL)-Centre National de la Recherche Scientifique (CNRS), Equipe NuTox (LNC - U1231) (NUTOX), Service de Médecine Néonatale [CHRU Nancy], Centre Hospitalier Régional Universitaire de Nancy (CHRU Nancy), Centre National de la Recherche Scientifique (CNRS)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Descartes - Paris 5 (UPD5)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Assistance publique - Hôpitaux de Paris (AP-HP) (APHP), Université de Maurice, Service de médecine foetale et foetopathologie, Service de Génétique, Hôpital de Hautepierre [Strasbourg], Department of Experimental Cardiology, Academic Medical Center - Academisch Medisch Centrum [Amsterdam] (AMC), and University of Amsterdam [Amsterdam] (UvA)-University of Amsterdam [Amsterdam] (UvA)-Heart Failure Research Center (HFRC)

Subjects
0301 basic medicine, Male, MESH: Limb Deformities, Congenital, Limb Deformities, Congenital, MESH: Phosphotransferases, [SDV.CAN]Life Sciences [q-bio]/Cancer, 030105 genetics & heredity, Biology, MESH: Founder Effect, Article, 03 medical and health sciences, Pulmonary hypoplasia, 0302 clinical medicine, Fryns syndrome, Loss of Function Mutation, Genetics, medicine, Missense mutation, Humans, Allele, [ SDV.GEN.GH ] Life Sciences [q-bio]/Genetics/Human genetics, Genetics (clinical), Loss function, Hernia, Diaphragmatic, [SDV.GEN]Life Sciences [q-bio]/Genetics, MESH: Humans, Phosphotransferases, MESH: Infant, Newborn, Infant, Newborn, Congenital diaphragmatic hernia, Facies, Infant, MESH: Loss of Function Mutation, medicine.disease, MESH: Infant, Hypoplasia, Founder Effect, MESH: Male, MESH: Hernia, Diaphragmatic, MESH: Facies, [SDV.GEN.GH]Life Sciences [q-bio]/Genetics/Human genetics, MESH: Gene Deletion, Female, MESH: Female, 030217 neurology & neurosurgery, Gene Deletion, Founder effect
Abstract

International audience; Fryns syndrome (FS) is a multiple malformations syndrome with major features of congenital diaphragmatic hernia, pulmonary hypoplasia, craniofacial dysmorphic features, distal digit hypoplasia, and a range of other lower frequency malformations. FS is typically lethal in the fetal or neonatal period. Inheritance is presumed autosomal recessive. Although no major genetic cause has been identified for FS, biallelic truncating variants in PIGN, encoding a component of the glycosylphosphatidylinositol (GPI)-anchor biosynthesis pathway, have been identified in a limited number of cases with a phenotype compatible with FS. Biallelic variants in PIGN, typically missense or compound missense with truncating, also cause multiple congenital anomalies-hypotonia-seizures syndrome 1 (MCAHS1). Here we report six further patients with FS with or without congenital diaphragmatic hernia and recessive loss of function PIGN alleles, including an intragenic deletion with a likely founder effect in La Réunion and other Indian Ocean islands. Our results support the hypothesis that a spectrum of phenotypic severity is associated with recessive PIGN variants, ranging from FS at the extreme end, caused by complete loss of function, to MCAHS1, in which some residual PIGN function may remain. Our data add FS resulting from PIGN variants to the catalog of inherited GPI deficiencies caused by the disruption of the GPI-anchor biosynthesis pathway.

Published
2018

5. Biallelic loss-of-function variations in PRDX3 cause cerebellar ataxia

Author

Alexandra Durr, Dagmar Timmann, Carlos T. Moraes, Lena Guillot-Noel, Adriana P. Rebelo, Giulia Coarelli, Claire Guissart, Christine Tranchant, Michel Koenig, Stephan Züchner, Claudia V. Pereira, Ludger Schöls, Matthis Synofzik, Giovanni Stevanin, Mathieu Anheim, Jack Howell, Andreas Traschütz, Vívian Pedigone Cintra, Ilse Eidhof, Bart P.C. van de Warrenburg, Annette Schenck, University of Miami Leonard M. Miller School of Medicine (UMMSM), Radboud university [Nijmegen], CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Institut du Cerveau et de la Moëlle Epinière = Brain and Spine Institute (ICM), Institut National de la Santé et de la Recherche Médicale (INSERM)-CHU Pitié-Salpêtrière [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), University of Duisburg-Essen, University of Tübingen, German Research Center for Neurodegenerative Diseases - Deutsches Zentrum für Neurodegenerative Erkrankungen (DZNE), Centre for Integrative Biology - CBI (Inserm U964 - CNRS UMR7104 - IGBMC), Institut de Génétique et de Biologie Moléculaire et Cellulaire (IGBMC), Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-Université de Strasbourg (UNISTRA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), CHU Strasbourg, Service de Neurologie [Strasbourg], CHU Strasbourg-Hopital Civil, Centre Hospitalier Régional Universitaire [Montpellier] (CHRU Montpellier), Physiologie & médecine expérimentale du Cœur et des Muscles [U 1046] (PhyMedExp), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Montpellier (UM)-Centre National de la Recherche Scientifique (CNRS), and Deutsches Zentrum für Neurodegenerative Erkrankungen [Ulm] (DZNE)

Subjects
0301 basic medicine, Male, Cerebellum, Peroxiredoxin III, MESH: Drosophila, [SDV.NEU.NB]Life Sciences [q-bio]/Neurons and Cognition [q-bio.NC]/Neurobiology, Medizin, Mitochondrion, medicine.disease_cause, 0302 clinical medicine, Loss of Function Mutation, MESH: Peroxiredoxin III, genetics [Oxidative Stress], MESH: Animals, genetics [Peroxiredoxin III], MESH: Middle Aged, MESH: Oxidative Stress, genetics [Cerebellar Ataxia], Neurodegeneration, ROS, Middle Aged, Disorders of movement Donders Center for Medical Neuroscience [Radboudumc 3], 3. Good health, Pedigree, MESH: Cerebellar Ataxia, medicine.anatomical_structure, Cerebellar atrophy, Drosophila, Female, medicine.symptom, Adult, Ataxia, Cerebellar Ataxia, MESH: Pedigree, Biology, pathology [Cerebellar Ataxia], PRDX3, 03 medical and health sciences, metabolism [Cerebellar Ataxia], medicine, Animals, Humans, ddc:610, Neurodevelopmental disorders Donders Center for Medical Neuroscience [Radboudumc 7], MESH: Humans, Cerebellar ataxia, ataxia, MESH: Adult, MESH: Loss of Function Mutation, medicine.disease, MESH: Male, Oxidative Stress, 030104 developmental biology, [SDV.GEN.GH]Life Sciences [q-bio]/Genetics/Human genetics, Cancer research, Neurology (clinical), MESH: Female, 030217 neurology & neurosurgery, Oxidative stress
Abstract

Peroxiredoxin 3 (PRDX3) belongs to a superfamily of peroxidases that function as protective antioxidant enzymes. Among the six isoforms (PRDX1–PRDX6), PRDX3 is the only protein exclusively localized to the mitochondria, which are the main source of reactive oxygen species. Excessive levels of reactive oxygen species are harmful to cells, inducing mitochondrial dysfunction, DNA damage, lipid and protein oxidation and ultimately apoptosis. Neuronal cell damage induced by oxidative stress has been associated with numerous neurodegenerative disorders including Alzheimer’s and Parkinson’s diseases. Leveraging the large aggregation of genomic ataxia datasets from the PREPARE (Preparing for Therapies in Autosomal Recessive Ataxias) network, we identified recessive mutations in PRDX3 as the genetic cause of cerebellar ataxia in five unrelated families, providing further evidence for oxidative stress in the pathogenesis of neurodegeneration. The clinical presentation of individuals with PRDX3 mutations consists of mild-to-moderate progressive cerebellar ataxia with concomitant hyper- and hypokinetic movement disorders, severe early-onset cerebellar atrophy, and in part olivary and brainstem degeneration. Patient fibroblasts showed a lack of PRDX3 protein, resulting in decreased glutathione peroxidase activity and decreased mitochondrial maximal respiratory capacity. Moreover, PRDX3 knockdown in cerebellar medulloblastoma cells resulted in significantly decreased cell viability, increased H2O2 levels and increased susceptibility to apoptosis triggered by reactive oxygen species. Pan-neuronal and pan-glial in vivo models of Drosophila revealed aberrant locomotor phenotypes and reduced survival times upon exposure to oxidative stress. Our findings reveal a central role for mitochondria and the implication of oxidative stress in PRDX3 disease pathogenesis and cerebellar vulnerability and suggest targets for future therapeutic approaches.

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