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1. Bi-allelic variants in IPO8 cause a connective tissue disorder associated with cardiovascular defects, skeletal abnormalities, and immune dysregulation

Author

Karine Duroure, Estelle Colin, Thomas Edouard, Ludovic Martin, Linda Grimaud, Lyndon Gallacher, George McGillivray, Guy Lenaers, Valérie Desquiret-Dumas, Clarisse Billon, Anne Breton, Mohammed Zarhrate, Emmanuel Mas, Dominique Bonneau, Lynn Pais, Daniel Henrion, Thomas Haaf, Reza Maroofian, Marianna Parlato, Frank M. Ruemmele, Anne-Laure Guihot, Anaïs Philippe, Ehsan Ghayoor Karimiani, Pauline E. Schneeberger, Stanislas Lyonnet, Bernadette Bègue, Bruno Moulin, Rémi Duclaux-Loras, Nicolas Cagnard, Michael Frank, Laurence Faivre, Ruben Attali, Yves Alembik, Filippo Del Bene, Kerstin Kutsche, Céline Revenu, Fabienne Charbit-Henrion, Katta M. Girisha, Aboulfazl Rad, Eyal Reinstein, Shalini S. Nayak, Barbara Vona, Nadine Cerf-Bensussan, Caroline Lekszas, Shay Tzur, Alban Ziegler, Susan M. White, Centre Hospitalier Universitaire d'Angers (CHU Angers), PRES Université Nantes Angers Le Mans (UNAM), MitoVasc - Physiopathologie Cardiovasculaire et Mitochondriale (MITOVASC), Université d'Angers (UA)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Laboratory of Intestinal Immunity (Equipe Inserm U1163), Imagine - Institut des maladies génétiques (IHU) (Imagine - U1163), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Cité (UPCité)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Cité (UPCité), Institut de la Vision, Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Paris Cité (UPCité), Institut de Recherche en Santé Digestive (IRSD ), Université Toulouse III - Paul Sabatier (UT3), Université de Toulouse (UT)-Université de Toulouse (UT)-Ecole Nationale Vétérinaire de Toulouse (ENVT), Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Université de Toulouse (UT)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université de Toulouse (UT)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Ingénierie Radioprotection Sûreté Démantèlement (IRSD), Centre National de la Recherche Scientifique (CNRS), Geroscience and rejuvenation research center (RESTORE), Université de Toulouse (UT)-Université de Toulouse (UT)-EFS-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Hôpital Européen Georges Pompidou [APHP] (HEGP), Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Hôpitaux Universitaires Paris Ouest - Hôpitaux Universitaires Île de France Ouest (HUPO), Embryology and genetics of human malformation, CHU Necker - Enfants Malades [AP-HP], Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), FHU TRANSLAD (CHU de Dijon), Centre Hospitalier Universitaire de Dijon - Hôpital François Mitterrand (CHU Dijon), Hôpital de Hautepierre [Strasbourg], Nouvel Hôpital Civil de Strasbourg, Tel Aviv University (TAU), Emedgene Technologies [Tel Aviv], Murdoch Children's Research Institute (MCRI), Universitaetsklinikum Hamburg-Eppendorf = University Medical Center Hamburg-Eppendorf [Hamburg] (UKE), Kasturba Medical College, Manipal, Massachusetts Institute of Technology (MIT), University College of London [London] (UCL), Eberhard Karls Universität Tübingen = Eberhard Karls University of Tuebingen, St George's, University of London, University of Würzburg = Universität Würzburg, Fondation Princesse Grace, Fondation Maladies Rares, Harbig Family Foundation, Royal Children's Hospital Foundation, University of Tubingen (2545-1-0), Federal Ministry of Education and Research (01DQ17003 to K.K.), Indian Council of Medical Research (file no. 5/7/1508/2016 to K.M.G), National Human Genome Research Institute, the National Eye Institute, and the National Heart, Lung, and Blood Institute grant UM1 HG008900, National Human Genome Research Institute grant R01 HG009141, Victorian Government's Operational Infrastructure Support Program, ANR-10-IAHU-0001,Imagine,Institut Hospitalo-Universitaire Imagine(2010), ANR-18-IAHU-0001,FOReSIGHT,Enabling Vision Restoration(2018), European Project: 661527,H2020,H2020-MSCA-IF-2014,NMJALS(2015), European Project: 339407,EC:FP7:ERC,ERC-2013-ADG,IMMUNOBIOTA(2014), Service de génétique [Angers], Université d'Angers (UA)-Centre Hospitalier Universitaire d'Angers (CHU Angers), PRES Université Nantes Angers Le Mans (UNAM)-PRES Université Nantes Angers Le Mans (UNAM), Autophagie infection et immunité - Autophagy Infection Immunity (APY), Centre International de Recherche en Infectiologie - UMR (CIRI), Institut National de la Santé et de la Recherche Médicale (INSERM)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS)-Institut National de la Santé et de la Recherche Médicale (INSERM)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Centre National de la Recherche Scientifique (CNRS), Génétique et Biologie du Développement, Institut Curie [Paris]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Paris (UP)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Paris (UP), Imagine - Institut des maladies génétiques (IMAGINE - 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), Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Institut National de la Santé et de la Recherche Médicale (INSERM), Physiopathologie Cardiovasculaire et Mitochondriale (MITOVASC), Institut National de la Santé et de la Recherche Médicale (INSERM)-Université de Paris (UP), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Ecole Nationale Vétérinaire de Toulouse (ENVT), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut National de Recherche pour l’Agriculture, l’Alimentation et l’Environnement (INRAE), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-EFS-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Embryology and genetics of human malformation (Equipe Inserm U1163), SEGUIN, Nathalie, Instituts Hospitalo-Universitaires - Institut Hospitalo-Universitaire Imagine - - Imagine2010 - ANR-10-IAHU-0001 - IAHU - VALID, Enabling Vision Restoration - - FOReSIGHT2018 - ANR-18-IAHU-0001 - IAHU - VALID, In vivo analysis of neuromuscular junction stability in zebrafish models of amyotrophic lateral sclerosis - NMJALS - - H20202015-11-16 - 2017-11-15 - 661527 - VALID, Host-microbiota interactions across the gut immune system:lessons from early onset inflammatory bowel diseases and from gnotobiotic mice - IMMUNOBIOTA - - EC:FP7:ERC2014-03-01 - 2019-02-28 - 339407 - VALID, École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Lyon (ENS Lyon)-Université Claude Bernard Lyon 1 (UCBL), and Université de Lyon-Université de Lyon-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)

Subjects
Male, Connective Tissue Disorder, Loss of Heterozygosity, [SDV.GEN] Life Sciences [q-bio]/Genetics, medicine.disease_cause, IPO8, TGF-β signaling, Pathogenesis, 0302 clinical medicine, Loss of Function Mutation, Transforming Growth Factor beta, connective tissue disorder, Child, Connective Tissue Diseases, Zebrafish, Genetics (clinical), Karyopherin, chemistry.chemical_classification, [SDV.MP.VIR] Life Sciences [q-bio]/Microbiology and Parasitology/Virology, Immunity, Cellular, 0303 health sciences, [SDV.MHEP] Life Sciences [q-bio]/Human health and pathology, Middle Aged, beta Karyopherins, Pedigree, arterial dilatation, Cell biology, [SDV.MHEP.CSC] Life Sciences [q-bio]/Human health and pathology/Cardiology and cardiovascular system, Phenotype, medicine.anatomical_structure, Cardiovascular Diseases, [SDV.MP.VIR]Life Sciences [q-bio]/Microbiology and Parasitology/Virology, Female, Bone Diseases, Signal Transduction, Adult, Adolescent, Connective tissue, Biology, Importin 8, Young Adult, 03 medical and health sciences, [SDV.IMM.VAC] Life Sciences [q-bio]/Immunology/Vaccinology, [SDV.MHEP.CSC]Life Sciences [q-bio]/Human health and pathology/Cardiology and cardiovascular system, Report, Genetics, medicine, Animals, Humans, 030304 developmental biology, [SDV.GEN]Life Sciences [q-bio]/Genetics, Infant, Immune dysregulation, Loeys-Dietz syndrome, biology.organism_classification, joint hyperlaxity, chemistry, [SDV.IMM.VAC]Life Sciences [q-bio]/Immunology/Vaccinology, 030217 neurology & neurosurgery, [SDV.MHEP]Life Sciences [q-bio]/Human health and pathology, Transforming growth factor
Abstract

International audience; Dysregulated transforming growth factor TGF-beta signaling underlies the pathogenesis of genetic disorders affecting the connective tissue such as Loeys-Dietz syndrome. Here, we report 12 individuals with bi-allelic loss-of-function variants in IPO8 who presented with a syndromic association characterized by cardio-vascular anomalies, joint hyperlaxity, and various degree of dysmorphic features and developmental delay as well as immune dysregulation; the individuals were from nine unrelated families. Importin 8 belongs to the karyopherin family of nuclear transport receptors and was previously shown to mediate TGF-beta-dependent SMADs trafficking to the nucleus in vitro. The important in vivo role of IPO8 in pSMAD nuclear translocation was demonstrated by CRISPR/Cas9-mediated inactivation in zebrafish. Consistent with IPO8's role in BMP/TGF-beta signaling, ipo8(-/-) zebrafish presented mild to severe dorso-ventral patterning defects during early embryonic development. Moreover, ipo8(-/-) zebrafish displayed severe cardiovascular and skeletal defects that mirrored the human phenotype. Our work thus provides evidence that IPO8 plays a critical and non-redundant role in TGF-beta signaling during development and reinforces the existing link between TGF-beta signaling and connective tissue defects.

Published
2021
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2. Redox Signaling via Lipid Peroxidation Regulates Retinal Progenitor Cell Differentiation

Author

Sophie Vriz, Carola Eleonora Parolin, Carole Gauron, Karine Duroure, Jessica Fiori, Shahad Albadri, Marion Thauvin, Natalia Calonghi, Federica Naso, Filippo Del Bene, Carla Boga, Juliette Vougny, Génétique et Biologie du Développement, Institut Curie [Paris]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), Centre interdisciplinaire de recherche en biologie (CIRB), Labex MemoLife, École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Collège de France (CdF (institution))-Ecole Superieure de Physique et de Chimie Industrielles de la Ville de Paris (ESPCI Paris), Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Shahad Albadri, Federica Naso, Marion Thauvin, Carole Gauron, Carola Parolin, Karine Duroure, Juliette Vougny, Jessica Fiori, Carla Boga, Sophie Vriz, Natalia Calonghi, Filippo Del Bene, Alma Mater Studiorum University of Bologna (UNIBO), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-École normale supérieure - Paris (ENS-PSL), and CCSD, Accord Elsevier

Subjects
Neurogenesis, Cellular differentiation, [SDV]Life Sciences [q-bio], stem cell metabolism, Histone Deacetylase 1, Biology, Retina, General Biochemistry, Genetics and Molecular Biology, Lipid peroxidation, 03 medical and health sciences, chemistry.chemical_compound, retinal progenitor cells, 0302 clinical medicine, Lipid oxidation, 9-hydroxystearic acid, Animals, redox signaling, neuronal differentiation, Molecular Biology, Zebrafish, Tissue homeostasis, Cell Proliferation, 030304 developmental biology, chemistry.chemical_classification, 0303 health sciences, Reactive oxygen species, Stem Cells, H(2)O(2), Wnt signaling pathway, Cell Differentiation, Cell Biology, Zebrafish Proteins, biology.organism_classification, HDAC1, Cell biology, [SDV] Life Sciences [q-bio], chemistry, Second messenger system, 9-hydroxystearic acid, retina, lipid peroxidation, redox signaling, zebrafish, Lipid Peroxidation, Reactive Oxygen Species, Oxidation-Reduction, 030217 neurology & neurosurgery, Developmental Biology
Abstract

International audience; Reactive oxygen species (ROS) and downstream products of lipid oxidation are emerging as important secondary messengers in tissue homeostasis. However, their regulation and mechanism of action remain poorly studied in vivo during normal development. Here, we reveal that the fine regulation of hydrogen peroxide (H2O2) levels by its scavenger Catalase to mediate the switch from proliferation to differentiation in retinal progenitor cells (RPCs) is crucial. We identify 9-hydroxystearic acid (9-HSA), an endogenous downstream lipid peroxidation product, as a mediator of this effect in the zebrafish retina. We show that the 9-HSA proliferative effect is due to the activation of Notch and Wnt pathways through the inhibition of the histone deacetylase 1. We show that the local and temporal manipulation of H2O2 levels in RPCs is sufficient to trigger their premature differentiation. We finally propose a mechanism that links H2O2 homeostasis and neuronal differentiation via the modulation of lipid peroxidation.

Published
2019
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3. Deletion of a kinesin I motor unmasks a mechanism of homeostatic branching control by neurotrophin-3

Author

Claire Wyart, Koichi Kawakami, Thomas O. Auer, Valérie Bercier, Tong Xiao, Christoph Gebhardt, Karine Duroure, Maximiliano L. Suster, Jean-Paul Concordet, Joachim Wittbrodt, Herwig Baier, Filippo Del Bene, Génétique et Biologie du Développement, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut Curie [Paris]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS), Centre for Organismal Studies EMBL (COS), Universität Heidelberg [Heidelberg] = Heidelberg University, Department of Physiology, University of California [San Francisco] (UC San Francisco), University of California (UC)-University of California (UC), Department of Chemistry & Biochemistry, University of California (UC), Structure et Instabilité des Génomes (STRING), Muséum national d'Histoire naturelle (MNHN)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut du Cerveau et de la Moëlle Epinière = Brain and Spine Institute (ICM), Université Pierre et Marie Curie - Paris 6 (UPMC)-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)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), National Institute of Genetics (NIG), Neural Circuits and Behaviour Group, School of Medicine and Public Health, Kyoto University, Max Planck Institute of Neurobiology, Centre National de la Recherche Scientifique (CNRS)-Institut Curie [Paris]-Institut National de la Santé et de la Recherche Médicale (INSERM)-Université Pierre et Marie Curie - Paris 6 (UPMC), Universität Heidelberg [Heidelberg], University of California [San Francisco] (UCSF), University of California-University of California, University of California, Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut National de la Santé et de la Recherche Médicale (INSERM)-Centre National de la Recherche Scientifique (CNRS)-CHU Pitié-Salpêtrière [AP-HP], Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP)-Sorbonne Université (SU)-Assistance publique - Hôpitaux de Paris (AP-HP) (AP-HP), Kyoto University [Kyoto], and HAL-UPMC, Gestionnaire

Subjects
Kinesins, Animals, Genetically Modified, Neurotrophin 3, Postsynaptic potential, Cell polarity, Biology (General), Cloning, Molecular, In Situ Hybridization, Zebrafish, Microscopy, Confocal, axonal development, General Neuroscience, Neurogenesis, Cell Polarity, Chromosome Mapping, General Medicine, Anatomy, Immunohistochemistry, neurotrophic signaling, Cell biology, Mitochondria, medicine.anatomical_structure, Retinal ganglion cell, Medicine, Kinesin, Research Article, Signal Transduction, Genotype, QH301-705.5, Science, Blotting, Western, Neurotransmission, Biology, Real-Time Polymerase Chain Reaction, Time-Lapse Imaging, General Biochemistry, Genetics and Molecular Biology, Microscopy, Electron, Transmission, medicine, Animals, DNA Primers, General Immunology and Microbiology, [SCCO.NEUR]Cognitive science/Neuroscience, [SCCO.NEUR] Cognitive science/Neuroscience, Biological Transport, Zebrafish Proteins, Axons, nervous system, Retrograde signaling, Axoplasmic transport, visual system, Neuroscience
Abstract

Development and function of highly polarized cells such as neurons depend on microtubule-associated intracellular transport, but little is known about contributions of specific molecular motors to the establishment of synaptic connections. In this study, we investigated the function of the Kinesin I heavy chain Kif5aa during retinotectal circuit formation in zebrafish. Targeted disruption of Kif5aa does not affect retinal ganglion cell differentiation, and retinal axons reach their topographically correct targets in the tectum, albeit with a delay. In vivo dynamic imaging showed that anterograde transport of mitochondria is impaired, as is synaptic transmission. Strikingly, disruption of presynaptic activity elicits upregulation of Neurotrophin-3 (Ntf3) in postsynaptic tectal cells. This in turn promotes exuberant branching of retinal axons by signaling through the TrkC receptor (Ntrk3). Thus, our study has uncovered an activity-dependent, retrograde signaling pathway that homeostatically controls axonal branching. DOI: http://dx.doi.org/10.7554/eLife.05061.001, eLife digest Different regions of a neuron have distinct structures and roles. For example, each neuron has a cable-like structure called the axon that extends out of the body of the cell and carries electrical signals away from the cell body. To pass these messages on to neighboring cells, branches on the axon form connections called synapses with other neurons. The axon lacks most of the cellular machinery needed to make proteins and other molecules that the cell needs to work correctly. Therefore, neurons must transport these materials from the cell body—where they are produced—down to the end of the axon. Specialized proteins called molecular motors carry this cargo down the axon along ‘tracks’ composed of filaments called microtubules. Auer, Xiao et al. have now used genetic techniques to disrupt the gene that encodes an important molecular motor, called Kif5A, in developing zebrafish larvae. The effects of this manipulation on the development of the zebrafish's visual system were then examined. When zebrafish are a few days old, neurons in the retina—the structure at the back of the eye that responds to light—extend axons into a region of the brain called the tectum. The formation of synapses between cells in the retina and the tectum provides a pathway that enables information to travel from the eye to the brain. Auer, Xiao et al. found that in larvae that lack Kif5A, axons from the retina enter the brain about a day later than they do in normal larvae. However, when these mutant axons arrive, they produce large numbers of branches, each with the potential to form multiple synapses with cells in the tectum. However, none of the resulting synapses appear to respond to visual stimuli, which is consistent with the fact that Kif5A mutant larvae are blind. Experiments to identify what triggers the excessive branching of retinal axons revealed that the mutant fish had elevated levels of a growth-promoting protein called neurotrophin-3 in cells in the tectum. This increased production of neurotrophin-3 was also observed when neuronal activity was blocked, for example by toxins. The lack of neuronal activity in retinal axons therefore seems to increase the production of neurotrophin-3, which in turn stimulates axonal branching. Future experiments could investigate the molecular signal that drives this increased production of neurotrophin-3, and how this is regulated during normal neuronal development. DOI: http://dx.doi.org/10.7554/eLife.05061.002

Published
2015
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