1
|
Rodríguez-Arzate CA, Noguez-Imm R, Reyes-Ortega P, Rodríguez-Ortiz LR, García-Peña MF, Ordaz RP, Vélez-Uriza F, Cisneros-Mejorado A, Arellano RO, Pérez CI, Hernández-Zimbrón LF, Dégardin J, Simonutti M, Picaud S, Thébault SC. Potential contributions of the intrinsic retinal oscillations recording using non-invasive electroretinogram to bioelectronics. Front Cell Neurosci 2024; 17:1224558. [PMID: 38269118 PMCID: PMC10806452 DOI: 10.3389/fncel.2023.1224558] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Accepted: 12/15/2023] [Indexed: 01/26/2024] Open
Abstract
Targeted electric signal use for disease diagnostics and treatment is emerging as a healthcare game-changer. Besides arrhythmias, treatment-resistant epilepsy and chronic pain, blindness, and perhaps soon vision loss, could be among the pathologies that benefit from bioelectronic medicine. The electroretinogram (ERG) technique has long demonstrated its role in diagnosing eye diseases and early stages of neurodegenerative diseases. Conspicuously, ERG applications are all based on light-induced responses. However, spontaneous, intrinsic activity also originates in retinal cells. It is a hallmark of degenerated retinas and its alterations accompany obesity and diabetes. To the extent that variables extracted from the resting activity of the retina measured by ERG allow the predictive diagnosis of risk factors for type 2 diabetes. Here, we provided a comparison of the baseline characteristics of intrinsic oscillatory activity recorded by ERGs in mice, rats, and humans, as well as in several rat strains, and explore whether zebrafish exhibit comparable activity. Their pattern was altered in neurodegenerative models including the cuprizone-induced demyelination model in mice as well as in the Royal College of Surgeons (RCS-/-) rats. We also discuss how the study of their properties may pave the way for future research directions and treatment approaches for retinopathies, among others.
Collapse
Affiliation(s)
- Cynthia Alejandra Rodríguez-Arzate
- Laboratorio de Investigación Traslacional en Salud Visual D-13, Instituto de Neurobiología, Universidad Nacional Autónoma de México (UNAM), Querétaro, Mexico
| | - Ramsés Noguez-Imm
- Laboratorio de Investigación Traslacional en Salud Visual D-13, Instituto de Neurobiología, Universidad Nacional Autónoma de México (UNAM), Querétaro, Mexico
| | - Pamela Reyes-Ortega
- Laboratorio de Investigación Traslacional en Salud Visual D-13, Instituto de Neurobiología, Universidad Nacional Autónoma de México (UNAM), Querétaro, Mexico
| | - Luis Roberto Rodríguez-Ortiz
- Laboratorio de Neurobiología Molecular y Celular, Instituto de Neurobiología, Universidad Nacional Autónoma de México (UNAM), Querétaro, Mexico
| | - María Fernanda García-Peña
- Laboratorio de Neurobiología Molecular y Celular, Instituto de Neurobiología, Universidad Nacional Autónoma de México (UNAM), Querétaro, Mexico
| | - Rainald Pablo Ordaz
- Laboratorio de Neurofisiología Celular, Instituto de Neurobiología, Universidad Nacional Autónoma de México (UNAM), Querétaro, Mexico
| | - Fidel Vélez-Uriza
- Laboratorio de Neurofisiología Celular, Instituto de Neurobiología, Universidad Nacional Autónoma de México (UNAM), Querétaro, Mexico
| | - Abraham Cisneros-Mejorado
- Laboratorio de Neurofisiología Celular, Instituto de Neurobiología, Universidad Nacional Autónoma de México (UNAM), Querétaro, Mexico
| | - Rogelio O. Arellano
- Laboratorio de Neurofisiología Celular, Instituto de Neurobiología, Universidad Nacional Autónoma de México (UNAM), Querétaro, Mexico
| | - Claudia I. Pérez
- Laboratorio de Neurofisiología de los Hábitos, Instituto de Neurobiología, Universidad Nacional Autónoma de México (UNAM), Querétaro, Mexico
| | - Luis Fernando Hernández-Zimbrón
- Clínica de Salud Visual, Escuela Nacional de Estudios Superiores, Unidad León, Universidad Nacional Autonóma de México (UNAM), León, Guanajuato, Mexico
| | - Julie Dégardin
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Manuel Simonutti
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Serge Picaud
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Stéphanie C. Thébault
- Laboratorio de Investigación Traslacional en Salud Visual D-13, Instituto de Neurobiología, Universidad Nacional Autónoma de México (UNAM), Querétaro, Mexico
| |
Collapse
|
2
|
Cadoni S, Demené C, Alcala I, Provansal M, Nguyen D, Nelidova D, Labernède G, Lubetzki J, Goulet R, Burban E, Dégardin J, Simonutti M, Gauvain G, Arcizet F, Marre O, Dalkara D, Roska B, Sahel JA, Tanter M, Picaud S. Ectopic expression of a mechanosensitive channel confers spatiotemporal resolution to ultrasound stimulations of neurons for visual restoration. Nat Nanotechnol 2023; 18:667-676. [PMID: 37012508 DOI: 10.1038/s41565-023-01359-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Accepted: 02/13/2023] [Indexed: 06/18/2023]
Abstract
Remote and precisely controlled activation of the brain is a fundamental challenge in the development of brain-machine interfaces for neurological treatments. Low-frequency ultrasound stimulation can be used to modulate neuronal activity deep in the brain, especially after expressing ultrasound-sensitive proteins. But so far, no study has described an ultrasound-mediated activation strategy whose spatiotemporal resolution and acoustic intensity are compatible with the mandatory needs of brain-machine interfaces, particularly for visual restoration. Here we combined the expression of large-conductance mechanosensitive ion channels with uncustomary high-frequency ultrasonic stimulation to activate retinal or cortical neurons over millisecond durations at a spatiotemporal resolution and acoustic energy deposit compatible with vision restoration. The in vivo sonogenetic activation of the visual cortex generated a behaviour associated with light perception. Our findings demonstrate that sonogenetics can deliver millisecond pattern presentations via an approach less invasive than current brain-machine interfaces for visual restoration.
Collapse
Affiliation(s)
- Sara Cadoni
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Charlie Demené
- Physics for Medicine Paris, INSERM, CNRS, École Supérieure de Physique et de Chimie Industrielles (ESPCI Paris), Paris Sciences et Lettres (PSL) Research University, Paris, France
| | - Ignacio Alcala
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | | | - Diep Nguyen
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Dasha Nelidova
- Institute of Molecular and Clinical Ophthalmology Basel, Basel, Switzerland
| | | | - Jules Lubetzki
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Ruben Goulet
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Emma Burban
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Julie Dégardin
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Manuel Simonutti
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Gregory Gauvain
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Fabrice Arcizet
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Olivier Marre
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Deniz Dalkara
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Botond Roska
- Institute of Molecular and Clinical Ophthalmology Basel, Basel, Switzerland
| | - José Alain Sahel
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
- Department of Ophthalmology, The University of Pittsburgh School of Medicine, Pittsburgh, PA, USA
- Department of Ophthalmology and Vitreo-Retinal Diseases, Fondation Ophtalmologique Rothschild, Paris, France
- Centre Hospitalier National d'Ophtalmologie des XV-XX, Paris, France
| | - Mickael Tanter
- Physics for Medicine Paris, INSERM, CNRS, École Supérieure de Physique et de Chimie Industrielles (ESPCI Paris), Paris Sciences et Lettres (PSL) Research University, Paris, France
| | - Serge Picaud
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France.
| |
Collapse
|
3
|
Cwerman-Thibault H, Lechauve C, Malko-Baverel V, Augustin S, Le Guilloux G, Reboussin É, Degardin-Chicaud J, Simonutti M, Debeir T, Corral-Debrinski M. Neuroglobin effectively halts vision loss in Harlequin mice at an advanced stage of optic nerve degeneration. Neurobiol Dis 2021; 159:105483. [PMID: 34400304 DOI: 10.1016/j.nbd.2021.105483] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 08/06/2021] [Accepted: 08/11/2021] [Indexed: 10/20/2022] Open
Abstract
Mitochondrial diseases are among the most prevalent groups of inherited neurological disorders, affecting up to 1 in 5000 adults. Despite the progress achieved on the identification of gene mutations causing mitochondrial pathologies, they cannot be cured so far. Harlequin mice, a relevant model of mitochondrial pathology due to apoptosis inducing factor depletion, suffer from progressive disappearance of retinal ganglion cells leading to optic neuropathy. In our previous work, we showed that administering adeno-associated virus encompassing the coding sequences for neuroglobin, (a neuroprotective molecule belonging to the globin family) or apoptosis-inducing factor, before neurodegeneration onset, prevented retinal ganglion cell loss and preserved visual function. One of the challenges to develop an effective treatment for optic neuropathies is to consider that by the time patients become aware of their handicap, a large amount of nerve fibers has already disappeared. Gene therapy was performed in Harlequin mice aged between 4 and 5 months with either a neuroglobin or an apoptosis-inducing factor vector to determine whether the increased abundance of either one of these proteins in retinas could preserve visual function at this advanced stage of the disease. We demonstrated that gene therapy, by preserving the connectivity of transduced retinal ganglion cells and optic nerve bioenergetics, results in the enhancement of visual cortex activity, ultimately rescuing visual impairment. This study demonstrates that: (a) An increased abundance of neuroglobin functionally overcomes apoptosis-inducing factor absence in Harlequin mouse retinas at a late stage of neuronal degeneration; (b) The beneficial effect for visual function could be mediated by neuroglobin localization to the mitochondria, thus contributing to the maintenance of the organelle homeostasis.
Collapse
Affiliation(s)
| | - Christophe Lechauve
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, F-75012 Paris, France
| | | | - Sébastien Augustin
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, F-75012 Paris, France
| | | | - Élodie Reboussin
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, F-75012 Paris, France
| | | | - Manuel Simonutti
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, F-75012 Paris, France
| | | | | |
Collapse
|
4
|
Lhussiez V, Dubus E, Cesar Q, Acar N, Nandrot EF, Simonutti M, Audo I, Lizé E, Nguyen S, Geissler A, Bouchot A, Ansar M, Picaud S, Thauvin-Robinet C, Olivier-Faivre L, Duplomb L, Da Costa R. Cohen Syndrome-Associated Cataract Is Explained by VPS13B Functions in Lens Homeostasis and Is Modified by Additional Genetic Factors. Invest Ophthalmol Vis Sci 2021; 61:18. [PMID: 32915983 PMCID: PMC7488618 DOI: 10.1167/iovs.61.11.18] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Purpose Cohen syndrome (CS) is a rare genetic disorder caused by variants of the VPS13B gene. CS patients are affected with a severe form of retinal dystrophy, and in several cases cataracts also develop. The purpose of this study was to investigate the mechanisms and risk factors for cataract in CS, as well as to report on cataract surgeries in CS patients. Methods To understand how VPS13B is associated with visual impairments in CS, we generated the Vps13b∆Ex3/∆Ex3 mouse model. Mice from 1 to 3 months of age were followed by ophthalmoscopy and slit-lamp examinations. Phenotypes were investigated by histology, immunohistochemistry, and western blot. Literature analysis was performed to determine specific characteristic features of cataract in CS and to identify potential genotype–phenotype correlations. Results Cataracts rapidly developed in 2-month-old knockout mice and were present in almost all lenses at 3 months. Eye fundi appeared normal until cataract development. Lens immunostaining revealed that cataract formation was associated with the appearance of large vacuoles in the cortical area, epithelial–mesenchymal transition, and fibrosis. In later stages, cataracts became hypermature, leading to profound retinal remodeling due to inflammatory events. Literature analysis showed that CS-related cataracts display specific features compared to other forms of retinitis pigmentosa-related cataracts, and their onset is modified by additional genetic factors. Corroboratively, we were able to isolate a subline of the Vps13b∆Ex3/∆Ex3 model with delayed cataract onset. Conclusions VPS13B participates in lens homeostasis, and the CS-related cataract development dynamic is linked to additional genetic factors.
Collapse
Affiliation(s)
- Vincent Lhussiez
- INSERM UMR1231, Equipe GAD, Université de Bourgogne Franche Comté, Dijon, France
| | - Elisabeth Dubus
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France.,Centre des Sciences du Goût et de l'Alimentation, AgroSup Dijon, CNRS, INRAE, Université Bourgogne Franche-Comté, Dijon, France
| | - Quénol Cesar
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Niyazi Acar
- Centre des Sciences du Goût et de l'Alimentation, AgroSup Dijon, CNRS, INRAE, Université Bourgogne Franche-Comté, Dijon, France
| | - Emeline F Nandrot
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Manuel Simonutti
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Isabelle Audo
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Eléonore Lizé
- INSERM UMR1231, Equipe GAD, Université de Bourgogne Franche Comté, Dijon, France
| | - Sylvie Nguyen
- INSERM UMR1231, Equipe GAD, Université de Bourgogne Franche Comté, Dijon, France
| | - Audrey Geissler
- Plateforme d'Imagerie Cellulaire DImaCell (site CellImaP), INSERM LNC UMR1231, Dijon, France
| | - André Bouchot
- Plateforme d'Imagerie Cellulaire DImaCell (site CellImaP), INSERM LNC UMR1231, Dijon, France
| | - Muhammad Ansar
- Institute of Molecular and Clinical Ophthalmology Basel, Basel, Switzerland.,Department of Genetic Medicine and Development, University of Geneva Medical School, Geneva, Switzerland
| | - Serge Picaud
- Sorbonne Université, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Christel Thauvin-Robinet
- INSERM UMR1231, Equipe GAD, Université de Bourgogne Franche Comté, Dijon, France.,FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France.,Centre de Référence Déficiences Intellectuelles de Causes Rares, CHU Dijon Bourgogne, Dijon, France
| | - Laurence Olivier-Faivre
- INSERM UMR1231, Equipe GAD, Université de Bourgogne Franche Comté, Dijon, France.,FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France.,Centre de Référence Anomalies du Développement et Syndromes Malformatifs, CHU Dijon Bourgogne, Dijon, France
| | - Laurence Duplomb
- INSERM UMR1231, Equipe GAD, Université de Bourgogne Franche Comté, Dijon, France.,FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France
| | - Romain Da Costa
- INSERM UMR1231, Equipe GAD, Université de Bourgogne Franche Comté, Dijon, France.,FHU-TRANSLAD, CHU Dijon Bourgogne, Dijon, France
| |
Collapse
|
5
|
Diaz J, Gérard X, Emerit MB, Areias J, Geny D, Dégardin J, Simonutti M, Guerquin MJ, Collin T, Viollet C, Billard JM, Métin C, Hubert L, Larti F, Kahrizi K, Jobling R, Agolini E, Shaheen R, Zigler A, Rouiller-Fabre V, Rozet JM, Picaud S, Novelli A, Alameer S, Najmabadi H, Cohn R, Munnich A, Barth M, Lugli L, Alkuraya FS, Blaser S, Gashlan M, Besmond C, Darmon M, Masson J. YIF1B mutations cause a post-natal neurodevelopmental syndrome associated with Golgi and primary cilium alterations. Brain 2021; 143:2911-2928. [PMID: 33103737 DOI: 10.1093/brain/awaa235] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Revised: 05/29/2020] [Accepted: 06/13/2020] [Indexed: 12/30/2022] Open
Abstract
Human post-natal neurodevelopmental delay is often associated with cerebral alterations that can lead, by themselves or associated with peripheral deficits, to premature death. Here, we report the clinical features of 10 patients from six independent families with mutations in the autosomal YIF1B gene encoding a ubiquitous protein involved in anterograde traffic from the endoplasmic reticulum to the cell membrane, and in Golgi apparatus morphology. The patients displayed global developmental delay, motor delay, visual deficits with brain MRI evidence of ventricle enlargement, myelination alterations and cerebellar atrophy. A similar profile was observed in the Yif1b knockout (KO) mouse model developed to identify the cellular alterations involved in the clinical defects. In the CNS, mice lacking Yif1b displayed neuronal reduction, altered myelination of the motor cortex, cerebellar atrophy, enlargement of the ventricles, and subcellular alterations of endoplasmic reticulum and Golgi apparatus compartments. Remarkably, although YIF1B was not detected in primary cilia, biallelic YIF1B mutations caused primary cilia abnormalities in skin fibroblasts from both patients and Yif1b-KO mice, and in ciliary architectural components in the Yif1b-KO brain. Consequently, our findings identify YIF1B as an essential gene in early post-natal development in human, and provide a new genetic target that should be tested in patients developing a neurodevelopmental delay during the first year of life. Thus, our work is the first description of a functional deficit linking Golgipathies and ciliopathies, diseases so far associated exclusively to mutations in genes coding for proteins expressed within the primary cilium or related ultrastructures. We therefore propose that these pathologies should be considered as belonging to a larger class of neurodevelopmental diseases depending on proteins involved in the trafficking of proteins towards specific cell membrane compartments.
Collapse
Affiliation(s)
- Jorge Diaz
- INSERM UMR894, Center for Psychiatry and Neuroscience, Paris F-75014, Université Paris Descartes, Sorbonne Paris Cité - Paris 5, France
| | - Xavier Gérard
- INSERM UMR-S1163 Imagine Institute for Genetic Diseases, Paris Descartes-Sorbonne Paris Cité University, France
| | - Michel-Boris Emerit
- INSERM UMR894, Center for Psychiatry and Neuroscience, Paris F-75014, Université Paris Descartes, Sorbonne Paris Cité - Paris 5, France
| | - Julie Areias
- INSERM UMR894, Center for Psychiatry and Neuroscience, Paris F-75014, Université Paris Descartes, Sorbonne Paris Cité - Paris 5, France
| | - David Geny
- INSERM UMR894, Center for Psychiatry and Neuroscience, Paris F-75014, Université Paris Descartes, Sorbonne Paris Cité - Paris 5, France
| | - Julie Dégardin
- INSERM UMR-S968, Institut de la vision, Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, Paris F-75012, Université Pierre et Marie Curie, France
| | - Manuel Simonutti
- INSERM UMR-S968, Institut de la vision, Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, Paris F-75012, Université Pierre et Marie Curie, France
| | | | - Thibault Collin
- Saint Pères Paris Institute for the Neurosciences CNRS - UMR 8003 Université de Paris, Paris 75006, France
| | - Cécile Viollet
- INSERM UMR894, Center for Psychiatry and Neuroscience, Paris F-75014, Université Paris Descartes, Sorbonne Paris Cité - Paris 5, France
| | - Jean-Marie Billard
- INSERM UMR894, Center for Psychiatry and Neuroscience, Paris F-75014, Université Paris Descartes, Sorbonne Paris Cité - Paris 5, France
| | - Christine Métin
- INSERM, UMR-S1270, Institut du Fer à Moulin, Sorbonne Université, Paris F-75005, France
| | - Laurence Hubert
- INSERM UMR-S1163 Imagine Institute for Genetic Diseases, Paris Descartes-Sorbonne Paris Cité University, France
| | - Farzaneh Larti
- University of Social Welfare and Rehabilitation Sciences, Genetics Research Center, Tehran 19834, Iran
| | - Kimia Kahrizi
- University of Social Welfare and Rehabilitation Sciences, Genetics Research Center, Tehran 19834, Iran
| | - Rebekah Jobling
- The Hospital for Sick Children, Molecular Genetics, Toronto, Canada
| | - Emanuele Agolini
- Laboratory of Medical Genetics, Bambino Gesù Children's Hospital, 00146 Rome, Italy
| | - Ranad Shaheen
- King Faisal Specialist Hospital and Research Center, Developmental Genetics Unit, Riyadh 11211, Saudi Arabia
| | | | | | - Jean-Michel Rozet
- INSERM UMR-S1163 Imagine Institute for Genetic Diseases, Paris Descartes-Sorbonne Paris Cité University, France
| | - Serge Picaud
- INSERM UMR-S968, Institut de la vision, Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, Paris F-75012, Université Pierre et Marie Curie, France
| | - Antonio Novelli
- Laboratory of Medical Genetics, Bambino Gesù Children's Hospital, 00146 Rome, Italy
| | - Seham Alameer
- Department of Pediatrics, King Khaled National Guard Hospital, King Abdulaziz Medical City, Jeddah, Saudi Arabia
| | - Hossein Najmabadi
- University of Social Welfare and Rehabilitation Sciences, Genetics Research Center, Tehran 19834, Iran
| | - Ronald Cohn
- The Hospital for Sick Children, Molecular Genetics, Toronto, Canada
| | - Arnold Munnich
- INSERM UMR-S1163 Imagine Institute for Genetic Diseases, Paris Descartes-Sorbonne Paris Cité University, France
| | | | - Licia Lugli
- Division of Neonatal Intensive Care Unit, Department of Pediatrics, University Hospital, 41125 Modena, Italy
| | - Fowzan S Alkuraya
- King Faisal Specialist Hospital and Research Center, Developmental Genetics Unit, Riyadh 11211, Saudi Arabia
| | - Susan Blaser
- Division of Neuroradiology, The Hospital for Sick Children, University of Toronto, Toronto, Canada
| | - Maha Gashlan
- King Faisal Specialist Hospital and Research Center, Developmental Genetics Unit, Riyadh 11211, Saudi Arabia
| | - Claude Besmond
- INSERM UMR-S1163 Imagine Institute for Genetic Diseases, Paris Descartes-Sorbonne Paris Cité University, France
| | - Michèle Darmon
- INSERM UMR894, Center for Psychiatry and Neuroscience, Paris F-75014, Université Paris Descartes, Sorbonne Paris Cité - Paris 5, France.,INSERM, UMR-S1270, Institut du Fer à Moulin, Sorbonne Université, Paris F-75005, France
| | - Justine Masson
- INSERM UMR894, Center for Psychiatry and Neuroscience, Paris F-75014, Université Paris Descartes, Sorbonne Paris Cité - Paris 5, France.,INSERM, UMR-S1270, Institut du Fer à Moulin, Sorbonne Université, Paris F-75005, France
| |
Collapse
|
6
|
Cases O, Obry A, Ben-Yacoub S, Augustin S, Joseph A, Toutirais G, Simonutti M, Christ A, Cosette P, Kozyraki R. Impaired vitreous composition and retinal pigment epithelium function in the FoxG1::LRP2 myopic mice. Biochim Biophys Acta Mol Basis Dis 2017; 1863:1242-1254. [DOI: 10.1016/j.bbadis.2017.03.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 03/09/2017] [Accepted: 03/29/2017] [Indexed: 01/12/2023]
|
7
|
Hadj-Saïd W, Froger N, Ivkovic I, Jiménez-López M, Dubus É, Dégardin-Chicaud J, Simonutti M, Quénol C, Neveux N, Villegas-Pérez MP, Agudo-Barriuso M, Vidal-Sanz M, Sahel JA, Picaud S, García-Ayuso D. Quantitative and Topographical Analysis of the Losses of Cone Photoreceptors and Retinal Ganglion Cells Under Taurine Depletion. Invest Ophthalmol Vis Sci 2017; 57:4692-703. [PMID: 27607415 DOI: 10.1167/iovs.16-19535] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
PURPOSE Taurine depletion is known to induce photoreceptor degeneration and was recently found to also trigger retinal ganglion cell (RGC) loss similar to the retinal toxicity of vigabatrin. Our objective was to study the topographical loss of RGCs and cone photoreceptors, with a distinction between the two cone types (S- and L- cones) in an animal model of induced taurine depletion. METHODS We used the taurine transporter (Tau-T) inhibitor, guanidoethane sulfonate (GES), to induce taurine depletion at a concentration of 1% in the drinking water. Spectral-domain optical coherence tomography (SD-OCT) and electroretinograms (ERG) were performed on animals after 2 months of GES treatment administered through the drinking water. Retinas were dissected as wholemounts and immunodetection of Brn3a (RGC), S-opsin (S-cones), and L-opsin (L-cones) was performed. The number of Brn3a+ RGCs, and L- and S-opsin+ cones was automatically quantified and their retinal distribution studied using isodensity maps. RESULTS The treatment resulted in a significant reduction in plasma taurine levels and a profound dysfunction of visual performance as shown by ERG recordings. Optical coherence tomography analysis revealed that the retina was thinner in the taurine-depleted group. S-opsin+cones were more affected (36%) than L-opsin+cones (27%) with greater cone cell loss in the dorsal area whereas RGC loss (12%) was uniformly distributed. CONCLUSIONS This study confirms that taurine depletion causes RGC and cone loss. Electroretinograms results show that taurine depletion induces retinal dysfunction in photoreceptors and in the inner retina. It establishes a gradient of cell loss depending on the cell type from S-opsin+cones, L-opsin+cones, to RGCs. The greater cell loss in the dorsal retina and of the S-cone population may underline different cellular mechanisms of cellular degeneration and suggests that S-cones may be more sensitive to light-induced retinal toxicity enhanced by the taurine depletion.
Collapse
Affiliation(s)
- Wahiba Hadj-Saïd
- INSERM U968, Institut de la Vision, Paris, France 2Sorbonne Universités, UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, France 3CNRS UMR7210, Institut de la Vision, Paris, France
| | - Nicolas Froger
- INSERM U968, Institut de la Vision, Paris, France 2Sorbonne Universités, UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, France 3CNRS UMR7210, Institut de la Vision, Paris, France
| | - Ivana Ivkovic
- INSERM U968, Institut de la Vision, Paris, France 2Sorbonne Universités, UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, France 3CNRS UMR7210, Institut de la Vision, Paris, France
| | - Manuel Jiménez-López
- Departamento de Oftalmología, Facultad de Medicina, Universidad de Murcia, Murcia, Spain and Instituto Murciano de Investigación Biosanitaria- Hospital Virgen de la Arrixaca (IMIB-Arrixaca)
| | - Élisabeth Dubus
- INSERM U968, Institut de la Vision, Paris, France 2Sorbonne Universités, UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, France 3CNRS UMR7210, Institut de la Vision, Paris, France
| | - Julie Dégardin-Chicaud
- INSERM U968, Institut de la Vision, Paris, France 2Sorbonne Universités, UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, France 3CNRS UMR7210, Institut de la Vision, Paris, France
| | - Manuel Simonutti
- INSERM U968, Institut de la Vision, Paris, France 2Sorbonne Universités, UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, France 3CNRS UMR7210, Institut de la Vision, Paris, France
| | - César Quénol
- INSERM U968, Institut de la Vision, Paris, France 2Sorbonne Universités, UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, France 3CNRS UMR7210, Institut de la Vision, Paris, France
| | - Nathalie Neveux
- Service de Biochimie, Groupe Hospitalier Cochin - Hôtel-Dieu, Assistance Publique - Hôpitaux de Paris, Paris, France 6Laboratoire de Nutrition, EA 4466, Université Paris Descartes, Faculté de Pharmacie, Paris, France
| | - María Paz Villegas-Pérez
- Departamento de Oftalmología, Facultad de Medicina, Universidad de Murcia, Murcia, Spain and Instituto Murciano de Investigación Biosanitaria- Hospital Virgen de la Arrixaca (IMIB-Arrixaca)
| | - Marta Agudo-Barriuso
- Departamento de Oftalmología, Facultad de Medicina, Universidad de Murcia, Murcia, Spain and Instituto Murciano de Investigación Biosanitaria- Hospital Virgen de la Arrixaca (IMIB-Arrixaca)
| | - Manuel Vidal-Sanz
- Departamento de Oftalmología, Facultad de Medicina, Universidad de Murcia, Murcia, Spain and Instituto Murciano de Investigación Biosanitaria- Hospital Virgen de la Arrixaca (IMIB-Arrixaca)
| | - Jose-Alain Sahel
- INSERM U968, Institut de la Vision, Paris, France 2Sorbonne Universités, UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, France 3CNRS UMR7210, Institut de la Vision, Paris, France 7CHNO des Quinze-Vingts, Paris, France 8Academie des Sciences, Paris, France 9Fondation Ophtalmologique Adolphe de Rothschild, Paris, France
| | - Serge Picaud
- INSERM U968, Institut de la Vision, Paris, France 2Sorbonne Universités, UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, France 3CNRS UMR7210, Institut de la Vision, Paris, France
| | - Diego García-Ayuso
- Departamento de Oftalmología, Facultad de Medicina, Universidad de Murcia, Murcia, Spain and Instituto Murciano de Investigación Biosanitaria- Hospital Virgen de la Arrixaca (IMIB-Arrixaca)
| |
Collapse
|
8
|
Cwerman-Thibault H, Lechauve C, Augustin S, Roussel D, Reboussin É, Mohammad A, Degardin-Chicaud J, Simonutti M, Liang H, Brignole-Baudouin F, Maron A, Debeir T, Corral-Debrinski M. Neuroglobin Can Prevent or Reverse Glaucomatous Progression in DBA/2J Mice. Mol Ther Methods Clin Dev 2017; 5:200-220. [PMID: 28540323 PMCID: PMC5430497 DOI: 10.1016/j.omtm.2017.04.008] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 04/21/2017] [Indexed: 01/12/2023]
Abstract
Mitochondrial dysfunction is responsible for hereditary optic neuropathies. We wished to determine whether preserving mitochondrial bioenergetics could prevent optic neuropathy in a reliable model of glaucoma. DBA/2J mice exhibit elevated intraocular pressure, progressive degeneration of their retinal ganglion cells, and optic neuropathy that resembles glaucoma. We established that glaucoma in these mice is directly associated with mitochondrial dysfunction: respiratory chain activity was compromised in optic nerves 5 months before neuronal loss began, and the amounts of some mitochondrial proteins were reduced in retinas of glaucomatous mice. One of these proteins is neuroglobin, which has a neuroprotective function. Therefore, we investigated whether gene therapy aimed at restoring neuroglobin levels in the retina via ocular administration of an adeno-associated viral vector could reduce neuronal degeneration. The approach of treating 2-month-old mice impeded glaucoma development: few neurons died and respiratory chain activity and visual cortex activity were comparable to those in young, asymptomatic mice. When the treatment was performed in 8-month-old mice, the surviving neurons acquired new morphologic and functional properties, leading to the preservation of visual cortex activity and respiratory chain activity. The beneficial effects of neuroglobin in DBA/2J retinas confirm this protein to be a promising candidate for treating glaucoma.
Collapse
Affiliation(s)
- Hélène Cwerman-Thibault
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, 17 rue Moreau, 75012 Paris, France
- PROTECT, INSERM, Université Paris Diderot, Sorbonne Paris Cité, 75019 Paris, France
| | - Christophe Lechauve
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, 17 rue Moreau, 75012 Paris, France
- Department of Hematology, St. Jude Children’s Research Hospital, Memphis, TN 38105, USA
| | - Sébastien Augustin
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, 17 rue Moreau, 75012 Paris, France
| | - Delphine Roussel
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, 17 rue Moreau, 75012 Paris, France
- Institut du Cerveau et de la Moelle Épinière, Hôpital Pitié Salpêtrière, 75013 Paris, France
| | - Élodie Reboussin
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, 17 rue Moreau, 75012 Paris, France
| | - Ammara Mohammad
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, 17 rue Moreau, 75012 Paris, France
- Genomic Paris Centre, Institut de Biologie de l’Ecole normale supérieure, 46 rue d’Ulm, 75230 Paris, France
| | - Julie Degardin-Chicaud
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, 17 rue Moreau, 75012 Paris, France
| | - Manuel Simonutti
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, 17 rue Moreau, 75012 Paris, France
| | - Hong Liang
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, 17 rue Moreau, 75012 Paris, France
- CHNO des Quinze-Vingts, DHU Sight Restore, INSERM-DHOS CIC, 28 rue de Charenton, 75012 Paris, France
| | - Françoise Brignole-Baudouin
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, 17 rue Moreau, 75012 Paris, France
| | - Anne Maron
- Sanofi-Aventis, 94400 Vitry-sur-Seine, France
| | - Thomas Debeir
- Departments of Evaluation and Expertise Strategy, Science Policy and External Innovation, Sanofi, 75008 Paris, France
| | - Marisol Corral-Debrinski
- Sorbonne Universités, UPMC Univ Paris 06, INSERM, CNRS, Institut de la Vision, 17 rue Moreau, 75012 Paris, France
- PROTECT, INSERM, Université Paris Diderot, Sorbonne Paris Cité, 75019 Paris, France
- Corresponding author: Marisol Corral-Debrinski, PROTECT, INSERM (UMR1141), Université Paris Diderot, Sorbonne Paris Cité, 48 Boulevard Sérurier, 75019 Paris, France.
| |
Collapse
|
9
|
Gomez Perdiguero E, Liabotis-Fontugne A, Durand M, Faye C, Ricard-Blum S, Simonutti M, Augustin S, Robb BM, Paques M, Valenzuela DM, Murphy AJ, Yancopoulos GD, Thurston G, Galaup A, Monnot C, Germain S. ANGPTL4-αvβ3 interaction counteracts hypoxia-induced vascular permeability by modulating Src signalling downstream of vascular endothelial growth factor receptor 2. J Pathol 2016; 240:461-471. [PMID: 27577973 DOI: 10.1002/path.4805] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 08/22/2016] [Accepted: 08/26/2016] [Indexed: 01/13/2023]
Abstract
Dynamic control of endothelial cell junctions is essential for vascular homeostasis and angiogenesis. We recently provided genetic evidence that ANGPTL4 is a key regulator of vascular integrity both during developmental and in hypoxia-induced pathological conditions. The purpose of the present study was to decipher the molecular mechanisms through which ANGPTL4 regulates vascular integrity. Using surface plasmon resonance and proximity ligation assays, we show that ANGPTL4 binds integrin αvβ3. In vitro and in vivo functional assays with Angptl4-deficient mice demonstrate that ANGPTL4-αvβ3 interaction is necessary to mediate ANGPTL4 vasoprotective effects. Mechanistically, ANGPTL4-αvβ3 interaction enhances Src recruitment to integrin αvβ3 and inhibits Src signalling downstream of vascular endothelial growth factor receptor 2 (VEFGR2), thereby repressing hypoxia-induced breakdown of VEGFR2-VE-cadherin and VEGFR2-αvβ3 complexes. We further demonstrate that intravitreal injection of recombinant human ANGPTL4 limits vascular permeability and leads to increased adherens junction and tight junction integrity. These findings identify a novel mechanism by which ANGPTL4 counteracts hypoxia-driven vascular permeability through integrin αvβ3 binding, modulation of VEGFR2-Src kinase signalling, and endothelial junction stabilization. We further demonstrate that Angptl4-deficient mice show increased vascular leakage in vivo in a model of laser-induced choroidal neovascularization, indicating that this newly identified ANGPTL4-αvβ3 axis might be a target for pharmaceutical intervention in pathological conditions. Copyright © 2016 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
Collapse
Affiliation(s)
- Elisa Gomez Perdiguero
- Centre for Interdisciplinary Research in Biology (CIRB), College de France, CNRS, INSERM, PSL Research University, Paris, France.,Ecole Doctorale 394: Physiologie, Physiopathologie et Thérapeutique, Université Pierre et Marie Curie, Paris, France
| | - Athanasia Liabotis-Fontugne
- Centre for Interdisciplinary Research in Biology (CIRB), College de France, CNRS, INSERM, PSL Research University, Paris, France.,Ecole Doctorale 394: Physiologie, Physiopathologie et Thérapeutique, Université Pierre et Marie Curie, Paris, France
| | - Mélanie Durand
- Centre for Interdisciplinary Research in Biology (CIRB), College de France, CNRS, INSERM, PSL Research University, Paris, France
| | - Clément Faye
- UMR 5086 CNRS Université Lyon 1, Institut de Biologie et Chimie des Protéines, Lyon, France
| | - Sylvie Ricard-Blum
- UMR 5086 CNRS Université Lyon 1, Institut de Biologie et Chimie des Protéines, Lyon, France
| | - Manuel Simonutti
- Sorbonne Universités, UPMC Univ. Paris 06, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Sébastien Augustin
- Sorbonne Universités, UPMC Univ. Paris 06, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Bryan M Robb
- Sorbonne Universités, UPMC Univ. Paris 06, INSERM, CNRS, Institut de la Vision, Paris, France
| | - Michel Paques
- Sorbonne Universités, UPMC Univ. Paris 06, INSERM, CNRS, Institut de la Vision, Paris, France.,Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, INSERM-DHOS CIC 503, Paris, France
| | | | | | | | | | - Ariane Galaup
- Centre for Interdisciplinary Research in Biology (CIRB), College de France, CNRS, INSERM, PSL Research University, Paris, France
| | - Catherine Monnot
- Centre for Interdisciplinary Research in Biology (CIRB), College de France, CNRS, INSERM, PSL Research University, Paris, France
| | - Stéphane Germain
- Centre for Interdisciplinary Research in Biology (CIRB), College de France, CNRS, INSERM, PSL Research University, Paris, France
| |
Collapse
|
10
|
Pellizzari M, Simonutti M, Degardin J, Sahel JA, Fink M, Paques M, Atlan M. High speed optical holography of retinal blood flow. Opt Lett 2016; 41:3503-6. [PMID: 27472604 DOI: 10.1364/ol.41.003503] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/20/2023]
Abstract
We performed noninvasive video imaging of retinal blood flow in a pigmented rat by holographic interferometry of near-infrared laser light backscattered by retinal tissue, beating against an off-axis reference beam sampled at a frame rate of 39 kHz with a high throughput camera. Local Doppler contrasts emerged from the envelopes of short-time Fourier transforms and the phase of autocorrelation functions of holograms rendered by Fresnel transformation. This approach permitted imaging of blood flow in large retinal vessels (∼30 microns diameter) over 400×400 pixels with a spatial resolution of ∼8 microns and a temporal resolution of ∼6.5 ms.
Collapse
|
11
|
Kim HT, Kim SJ, Sohn YI, Paik SS, Caplette R, Simonutti M, Moon KH, Lee EJ, Min KW, Kim MJ, Lee DG, Simeone A, Lamonerie T, Furukawa T, Choi JS, Kweon HS, Picaud S, Kim IB, Shong M, Kim JW. Mitochondrial Protection by Exogenous Otx2 in Mouse Retinal Neurons. Cell Rep 2015; 13:990-1002. [PMID: 26565912 DOI: 10.1016/j.celrep.2015.09.075] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2015] [Revised: 09/15/2015] [Accepted: 09/25/2015] [Indexed: 10/22/2022] Open
Abstract
OTX2 (orthodenticle homeobox 2) haplodeficiency causes diverse defects in mammalian visual systems ranging from retinal dysfunction to anophthalmia. We find that the retinal dystrophy of Otx2(+/GFP) heterozygous knockin mice is mainly due to the loss of bipolar cells and consequent deficits in retinal activity. Among bipolar cell types, OFF-cone bipolar subsets, which lack autonomous Otx2 gene expression but receive Otx2 proteins from photoreceptors, degenerate most rapidly in Otx2(+/GFP) mouse retinas, suggesting a neuroprotective effect of the imported Otx2 protein. In support of this hypothesis, retinal dystrophy in Otx2(+/GFP) mice is prevented by intraocular injection of Otx2 protein, which localizes to the mitochondria of bipolar cells and facilitates ATP synthesis as a part of mitochondrial ATP synthase complex. Taken together, our findings demonstrate a mitochondrial function for Otx2 and suggest a potential therapeutic application of OTX2 protein delivery in human retinal dystrophy.
Collapse
Affiliation(s)
- Hyoung-Tai Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, South Korea
| | - Soung Jung Kim
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon 301-721, South Korea
| | - Young-In Sohn
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, South Korea
| | - Sun-Sook Paik
- Department of Anatomy, College of Medicine, The Catholic University of Korea, Seoul 137-701, South Korea
| | - Romain Caplette
- INSERM, U968, Paris 75012, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 968, Institut de la Vision, Paris 75012, France; CNRS, UMR_7210, Paris 75012, France
| | - Manuel Simonutti
- INSERM, U968, Paris 75012, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 968, Institut de la Vision, Paris 75012, France; CNRS, UMR_7210, Paris 75012, France
| | - Kyeong Hwan Moon
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, South Korea
| | - Eun Jung Lee
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, South Korea
| | - Kwang Wook Min
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, South Korea
| | - Mi Jeong Kim
- Nano-Bio Electron Microscopy Research Group, Korea Basic Science Institute (KBSI), Daejeon 305-806, South Korea
| | - Dong-Gi Lee
- Biological Disaster Analysis Group, Korea Basic Science Institute (KBSI), Daejeon 305-806, Korea
| | - Antonio Simeone
- Institute of Genetics and Biophysics, Adriano Buzzati-Traverso, Via Pietro Castellino 111, 80131 Napoli, Italy; IRCCS Neuromed, Pozzilli, IS 86077, Italy
| | - Thomas Lamonerie
- Institut de Biologie Valrose, University of Nice Sophia Antipolis, UMR UNS/CNRS 7277/INSERM 1091, Nice 06108, France
| | - Takahisa Furukawa
- Laboratory for Molecular and Developmental Biology, Institute for Protein Research, Osaka University, 3-2 Yamadaoka, Suita, Osaka 565-0871, Japan; AMED-CREST, Japan Agency for Medical Research and Development, Tokyo 100-0004, Japan
| | - Jong-Soon Choi
- Biological Disaster Analysis Group, Korea Basic Science Institute (KBSI), Daejeon 305-806, Korea
| | - Hee-Seok Kweon
- Nano-Bio Electron Microscopy Research Group, Korea Basic Science Institute (KBSI), Daejeon 305-806, South Korea
| | - Serge Picaud
- INSERM, U968, Paris 75012, France; Sorbonne Universités, UPMC Univ Paris 06, UMR_S 968, Institut de la Vision, Paris 75012, France; CNRS, UMR_7210, Paris 75012, France
| | - In-Beom Kim
- Department of Anatomy, College of Medicine, The Catholic University of Korea, Seoul 137-701, South Korea
| | - Minho Shong
- Research Center for Endocrine and Metabolic Diseases, Chungnam National University School of Medicine, Daejeon 301-721, South Korea
| | - Jin Woo Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 305-701, South Korea.
| |
Collapse
|
12
|
Cases O, Joseph A, Obry A, Santin MD, Ben-Yacoub S, Pâques M, Amsellem-Levera S, Bribian A, Simonutti M, Augustin S, Debeir T, Sahel JA, Christ A, de Castro F, Lehéricy S, Cosette P, Kozyraki R. Foxg1-Cre Mediated Lrp2 Inactivation in the Developing Mouse Neural Retina, Ciliary and Retinal Pigment Epithelia Models Congenital High Myopia. PLoS One 2015; 10:e0129518. [PMID: 26107939 PMCID: PMC4480972 DOI: 10.1371/journal.pone.0129518] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2014] [Accepted: 05/08/2015] [Indexed: 12/11/2022] Open
Abstract
Myopia is a common ocular disorder generally due to increased axial length of the eye-globe. Its extreme form high myopia (HM) is a multifactorial disease leading to retinal and scleral damage, visual impairment or loss and is an important health issue. Mutations in the endocytic receptor LRP2 gene result in Donnai-Barrow (DBS) and Stickler syndromes, both characterized by HM. To clearly establish the link between Lrp2 and congenital HM we inactivated Lrp2 in the mouse forebrain including the neural retina and the retinal and ciliary pigment epithelia. High resolution in vivo MRI imaging and ophthalmological analyses showed that the adult Lrp2-deficient eyes were 40% longer than the control ones mainly due to an excessive elongation of the vitreal chamber. They had an apparently normal intraocular pressure and developed chorioretinal atrophy and posterior scleral staphyloma features reminiscent of human myopic retinopathy. Immunomorphological and ultrastructural analyses showed that increased eye lengthening was first observed by post-natal day 5 (P5) and that it was accompanied by a rapid decrease of the bipolar, photoreceptor and retinal ganglion cells, and eventually the optic nerve axons. It was followed by scleral thinning and collagen fiber disorganization, essentially in the posterior pole. We conclude that the function of LRP2 in the ocular tissues is necessary for normal eye growth and that the Lrp2-deficient eyes provide a unique tool to further study human HM.
Collapse
Affiliation(s)
- Olivier Cases
- INSERM, U968, Paris, F-75012, France
- UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, F-75012, France
- CNRS, UMR_7210, Paris, F-75012, France
| | - Antoine Joseph
- INSERM, U968, Paris, F-75012, France
- UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, F-75012, France
- CNRS, UMR_7210, Paris, F-75012, France
| | - Antoine Obry
- CNRS, UMR_6270, PISSARO Proteomics Platform, Institute for Research and Innovation in Biomedicine, Rouen University Hospital, Rouen, F-76821, France
- INSERM, U905, PISSARO Proteomics Platform, Institute for Research and Innovation in Biomedicine, Rouen University Hospital, Rouen, F-76821, France
| | | | - Sirine Ben-Yacoub
- INSERM, U968, Paris, F-75012, France
- UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, F-75012, France
- CNRS, UMR_7210, Paris, F-75012, France
| | - Michel Pâques
- INSERM, U968, Paris, F-75012, France
- UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, F-75012, France
- CNRS, UMR_7210, Paris, F-75012, France
- Centre Hospitalier National d’Ophthalmologie des Quinze-Vingts, INSERM-DHOS CIC 503, Paris, F-75012, France
| | - Sabine Amsellem-Levera
- INSERM, U968, Paris, F-75012, France
- UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, F-75012, France
- CNRS, UMR_7210, Paris, F-75012, France
| | - Ana Bribian
- Grupo de Neurobiologia del Desarollo-GNDe, Hospital Nacional de Parapléjicos, Toledo, Spain
| | - Manuel Simonutti
- INSERM, U968, Paris, F-75012, France
- UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, F-75012, France
- CNRS, UMR_7210, Paris, F-75012, France
| | - Sébastien Augustin
- INSERM, U968, Paris, F-75012, France
- UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, F-75012, France
- CNRS, UMR_7210, Paris, F-75012, France
| | | | - José Alain Sahel
- INSERM, U968, Paris, F-75012, France
- UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, F-75012, France
- CNRS, UMR_7210, Paris, F-75012, France
- Centre Hospitalier National d’Ophthalmologie des Quinze-Vingts, INSERM-DHOS CIC 503, Paris, F-75012, France
| | - Annabel Christ
- Max-Delbrück-Center for Molecular Medicine, Berlin, D-13125, Germany
| | - Fernando de Castro
- Grupo de Neurobiologia del Desarollo-GNDe, Hospital Nacional de Parapléjicos, Toledo, Spain
| | | | - Pascal Cosette
- CNRS, UMR_6270, PISSARO Proteomics Platform, Institute for Research and Innovation in Biomedicine, Rouen University Hospital, Rouen, F-76821, France
| | - Renata Kozyraki
- INSERM, U968, Paris, F-75012, France
- UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, F-75012, France
- CNRS, UMR_7210, Paris, F-75012, France
- * E-mail:
| |
Collapse
|
13
|
Magnain C, Castel A, Boucneau T, Simonutti M, Ferezou I, Rancillac A, Vitalis T, Sahel JA, Paques M, Atlan M. Holographic laser Doppler imaging of microvascular blood flow. J Opt Soc Am A Opt Image Sci Vis 2014; 31:2723-35. [PMID: 25606762 DOI: 10.1364/josaa.31.002723] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We report on local superficial blood flow monitoring in biological tissue from laser Doppler holographic imaging. In time-averaging recording conditions, holography acts as a narrowband bandpass filter, which, combined with a frequency-shifted reference beam, permits frequency-selective imaging in the radio frequency range. These Doppler images are acquired with an off-axis Mach-Zehnder interferometer. Microvascular hemodynamic components mapping is performed in the cerebral cortex of the mouse and the eye fundus of the rat with near-infrared laser light without any exogenous marker. These measures are made from a basic inverse-method analysis of local first-order optical fluctuation spectra at low radio frequencies, from 0 Hz to 100 kHz. Local quadratic velocity is derived from Doppler broadenings induced by fluid flows, with elementary diffusing wave spectroscopy formalism in backscattering configuration. We demonstrate quadratic mean velocity assessment in the 0.1-10 mm/s range in vitro and imaging of superficial blood perfusion with a spatial resolution of about 10 micrometers in rodent models of cortical and retinal blood flow.
Collapse
|
14
|
Berger A, Cavallero S, Dominguez E, Barbe P, Simonutti M, Sahel JA, Sennlaub F, Raoul W, Paques M, Bemelmans AP. Spectral-domain optical coherence tomography of the rodent eye: highlighting layers of the outer retina using signal averaging and comparison with histology. PLoS One 2014; 9:e96494. [PMID: 24788712 PMCID: PMC4008571 DOI: 10.1371/journal.pone.0096494] [Citation(s) in RCA: 74] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2013] [Accepted: 04/08/2014] [Indexed: 12/12/2022] Open
Abstract
Spectral-Domain Optical Coherence Tomography (SD-OCT) is a widely used method to observe retinal layers and follow pathological events in human. Recently, this technique has been adapted for animal imaging. This non-invasive technology brings a cross-sectional visualization of the retina, which permits to observe precisely each layer. There is a clear expansion of the use of this imaging modality in rodents, thus, a precise characterization of the different outer retinal layers observed by SD-OCT is now necessary to make the most of this technology. The identification of the inner strata until the outer nuclear layer has already been clearly established, while the attribution of the layers observed by SD-OCT to the structures corresponding to photoreceptors segments and retinal pigment epithelium is much more questionable. To progress in the understanding of experimental SD-OCT imaging, we developed a method for averaging SD-OCT data to generate a mean image allowing to better delineate layers in the retina of pigmented and albino strains of mice and rats. It allowed us to locate precisely the interface between photoreceptors and retinal pigment epithelium and to identify unambiguously four layers corresponding to the inner and outer parts of photoreceptors segments. We show that the thickness of the various layers can be measured as accurately in vivo on SD-OCT images, than post-mortem by a morphometric analysis of histological sections. We applied SD-OCT to different models and demonstrated that it allows analysis of focal or diffuse retinal pathological processes such as mutation-dependant damages or light-driven modification of photoreceptors. Moreover, we report a new method of combined use of SD-OCT and integration to quantify laser-induced choroidal neovascularization. In conclusion, we clearly demonstrated that SD-OCT represents a valuable tool for imaging the rodent retina that is at least as accurate as histology, non-invasive and allows longitudinal follow-up of the same animal.
Collapse
Affiliation(s)
- Adeline Berger
- Inserm, U 968, Paris, France
- UPMC Univ Paris 06, UMR_S 968, Institut de la Vision, Paris, France
| | - Sophie Cavallero
- Inserm, U 968, Paris, France
- UPMC Univ Paris 06, UMR_S 968, Institut de la Vision, Paris, France
| | - Elisa Dominguez
- Inserm, U 968, Paris, France
- UPMC Univ Paris 06, UMR_S 968, Institut de la Vision, Paris, France
| | - Peggy Barbe
- Inserm, U 968, Paris, France
- UPMC Univ Paris 06, UMR_S 968, Institut de la Vision, Paris, France
| | - Manuel Simonutti
- Inserm, U 968, Paris, France
- UPMC Univ Paris 06, UMR_S 968, Institut de la Vision, Paris, France
| | - José-Alain Sahel
- Inserm, U 968, Paris, France
- UPMC Univ Paris 06, UMR_S 968, Institut de la Vision, Paris, France
- Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, INSERM-DHOS CIC 503, Paris, France
| | - Florian Sennlaub
- Inserm, U 968, Paris, France
- UPMC Univ Paris 06, UMR_S 968, Institut de la Vision, Paris, France
| | - William Raoul
- Inserm, U 968, Paris, France
- UPMC Univ Paris 06, UMR_S 968, Institut de la Vision, Paris, France
| | - Michel Paques
- Inserm, U 968, Paris, France
- UPMC Univ Paris 06, UMR_S 968, Institut de la Vision, Paris, France
- Centre Hospitalier National d'Ophtalmologie des Quinze-Vingts, INSERM-DHOS CIC 503, Paris, France
| | - Alexis-Pierre Bemelmans
- Inserm, U 968, Paris, France
- UPMC Univ Paris 06, UMR_S 968, Institut de la Vision, Paris, France
- CEA, DSV, IBM, Molecular Imaging Research Center (MIRCen), Fontenay-aux-Roses, France
- CNRS, CEA URA 2210, Fontenay-aux-Roses, France
- * E-mail:
| |
Collapse
|
15
|
Cia D, Simonutti M, Fort PE, Doly M, Rendon A. Slight Alteration of the Electroretinogram in Mice Lacking Dystrophin Dp71. Ophthalmic Res 2014; 51:196-203. [DOI: 10.1159/000357272] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2013] [Accepted: 11/11/2013] [Indexed: 11/19/2022]
|
16
|
Bernard C, Kim HT, Torero Ibad R, Lee EJ, Simonutti M, Picaud S, Acampora D, Simeone A, Di Nardo AA, Prochiantz A, Moya KL, Kim JW. Graded Otx2 activities demonstrate dose-sensitive eye and retina phenotypes. Hum Mol Genet 2013; 23:1742-53. [PMID: 24234651 DOI: 10.1093/hmg/ddt562] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In the human, mutations of OTX2 (Orthodenticle homeobox 2 transcription factor) translate into eye malformations of variable expressivity (even between the two eyes of the same individual) and incomplete penetrance, suggesting the existence of subtle thresholds in OTX2 activity. We have addressed this issue by analyzing retinal structure and function in six mutant mice with graded Otx2 activity: Otx2(+/+), Otx2(+/AA), Otx2(+/GFP), Otx2(AA/AA), Otx2(AA/GFP) and Otx2(GFP/GFP). Null mice (Otx2(GFP/GFP)) fail to develop the head and are embryonic lethal, and compound heterozygous Otx2(AA/GFP) mice show a truncated head and die at birth. All other genotypes develop until adulthood. We analyzed eye structure and visual physiology in the genotypes that develop until adulthood and report that phenotype severity parallels Otx2 activity. Otx2(+/AA) are only mildly affected whereas Otx2(+/GFP) are more affected than Otx2(+/AA) but less than Otx2(AA/AA) mice. Otx2(AA/AA) mice later manifest the most severe defects, with variable expressivity. Electrophysiological and histological analyses of the mouse retina revealed progressive death of bipolar cells and cone photoreceptors that is both Otx2 activity- and age-dependent with the same ranking of phenotypic severity. This study demonstrates the importance of gene dosage in the development of age-dependent pathologies and underscores the fact that small gene dosage differences can cause significant pathological states.
Collapse
Affiliation(s)
- Clémence Bernard
- Collège de France, Center for Interdisciplinary Research in Biology, UMR CNRS 7241/INSERM U1050, 11 place Marcelin Berthelot, Paris 75005, France
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
17
|
Bouaita A, Augustin S, Lechauve C, Cwerman-Thibault H, Bénit P, Simonutti M, Paques M, Rustin P, Sahel JA, Corral-Debrinski M. Downregulation of apoptosis-inducing factor in Harlequin mice induces progressive and severe optic atrophy which is durably prevented by AAV2-AIF1 gene therapy. ACTA ACUST UNITED AC 2011; 135:35-52. [PMID: 22120150 DOI: 10.1093/brain/awr290] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The Harlequin mutant mouse, characterized by loss of function of apoptosis-inducing factor, represents a reliable genetic model that resembles pathologies caused by human mitochondrial complex I deficiency. Therefore, we extensively characterized the retinal morphology and function of Harlequin mice during the course of neuronal cell death leading to blindness, with the aim of preventing optic atrophy. Retinas and optic nerves from these mice showed an isolated respiratory chain complex I defect correlated with retinal ganglion cell loss, optic atrophy, glial and microglial cell activation. All of these changes led to irreversible vision loss. In control mice, retinas AIF1 messenger RNA was 2.3-fold more abundant than AIF2, both messenger RNAs being sorted to the mitochondrial surface. In Harlequin mouse retinas, there was a 96% decrease of both AIF1 and AIF2 messenger RNA steady-state levels. We attained substantial and long-lasting protection of retinal ganglion cell and optic nerve integrity, the preservation of complex I function in optic nerves, as well as the prevention of glial and microglial responses after intravitreal administration of an AAV2 vector containing the full-length open reading frame and the 3' untranslated region of the AIF1 gene. Therefore, we demonstrate that gene therapy for mitochondrial diseases due to mutations in nuclear DNA can be achieved, so long as the 'therapeutic gene' permits the accurate cellular localization of the corresponding messenger RNA.
Collapse
|
18
|
Paques M, Simonutti M, Augustin S, Goupille O, El Mathari B, Sahel JA. In vivo observation of the locomotion of microglial cells in the retina. Glia 2011; 58:1663-8. [PMID: 20578032 DOI: 10.1002/glia.21037] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Microglial cells (MCs) are active sensors and reactive phagocytes of neural tissues. They are known to migrate and accumulate in areas of neuronal damage. Thus, microglial locomotion is an essential feature of the inflammatory reaction in neural tissue. Yet, to our knowledge there has been no report of direct in vivo observation of the migration of MCs. Here, we show that intravitreally injected cyanine dyes (DiO, DiI, and indocyanine green) are sequestrated in MCs during several months, and subsequently in vivo images of these fluorescent MCs can be obtained by confocal scanning laser ophthalmoscopy. This enabled noninvasive, time-lapse observation of the migrating behavior of MCs, both in the basal state and following laser damage. In the basal state, a slow, intermittent, random-like locomotion was observed. Following focal laser damage, MCs promptly (i.e., within 1 h) initiated centripetal, convergent migration. MCs up to 400 μm away migrated into the scar at velocities up to 7 μm/min. This early phase of centripetal migration was followed by a more prolonged phase of nontargeted locomotion around and within injured sites during at least 24 h. Cyanine-positive cells persisted within the scar during several weeks. To our knowledge, this is the first in vivo observation of the locomotion of individual MCs. Our results show that the locomotion of MCs is not limited to translocation to acutely damaged area, but may also be observed in the basal state and after completion of the recruitment of MCs into scars.
Collapse
Affiliation(s)
- Michel Paques
- Inserm, UMR_S968, Institut de la Vision, Paris, France.
| | | | | | | | | | | |
Collapse
|
19
|
Abstract
We report laser Doppler ophthalmoscopic fundus imaging in the rat eye with near-IR heterodyne holography. Sequential sampling of the beat of the reflected radiation against a frequency-shifted optical local oscillator is made onto an array detector. Wide-field maps of fluctuation spectra in the 10 Hz to 25 kHz band exhibit angiographic contrasts in the retinal vascular tree without requirement of an exogenous marker.
Collapse
Affiliation(s)
- M Simonutti
- Institut National de la Santé et de la Recherche Médicale-101, UMR-S 968, rue de Tolbiac, 75654 Paris Cedex 13, France
| | | | | | | | | | | | | |
Collapse
|
20
|
Jammoul F, Dégardin J, Pain D, Gondouin P, Simonutti M, Dubus E, Caplette R, Fouquet S, Craft CM, Sahel JA, Picaud S. Taurine deficiency damages photoreceptors and retinal ganglion cells in vigabatrin-treated neonatal rats. Mol Cell Neurosci 2010; 43:414-21. [PMID: 20132888 DOI: 10.1016/j.mcn.2010.01.008] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2009] [Revised: 01/22/2010] [Accepted: 01/26/2010] [Indexed: 10/19/2022] Open
Abstract
The anti-epileptic drug vigabatrin induces an irreversible constriction of the visual field, but is still widely used to treat infantile spasms and some forms of epilepsy. We recently reported that vigabatrin-induced cone damage is due to a taurine deficiency. However, optic atrophy and thus retinal ganglion cell degeneration was also reported in children treated for infantile spasms. We here show in neonatal rats treated from postnatal days 4 to 29 that the vigabatrin treatment triggers not only cone photoreceptor damage, disorganisation of the photoreceptor layer and gliosis but also retinal ganglion cell loss. Furthermore, we demonstrate in these neonatal rats that taurine supplementation partially prevents these retinal lesions and in particular the retinal ganglion cell loss. These results provide the first evidence of retinal ganglion cell neuroprotection by taurine. They further confirm that taurine supplementation should be administered with the vigabatrin treatment for infantile spasms or epilepsy.
Collapse
Affiliation(s)
- Firas Jammoul
- INSERM, UMR_S968, Institut de la Vision, Paris, France; UPMC Univ Paris 06, UMR_S968, Institut de la Vision, Paris, France
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
21
|
Kolomiets B, Dubus E, Simonutti M, Rosolen S, Sahel JA, Picaud S. Late histological and functional changes in the P23H rat retina after photoreceptor loss. Neurobiol Dis 2010; 38:47-58. [PMID: 20060471 DOI: 10.1016/j.nbd.2009.12.025] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2009] [Revised: 12/09/2009] [Accepted: 12/26/2009] [Indexed: 10/20/2022] Open
Abstract
Several strategies have been proposed to restore useful vision following photoreceptor degeneration. However, a very few studies have investigated late anatomical changes and functional state of residual retinal neurons after complete photoreceptor loss. We investigated the progressive degeneration of retinal ganglion cells (RGCs) in P23H rats. The RGC multielectrode array recordings indicated lower firing rates, disappearance of broad-scale, and maintenance of short-scale pairwise correlations. Up to 11% of RGCs displayed repetitive and often correlated spike discharges, reminiscent of developmental rhythmic activity, which could be reversibly suppressed by blockade of the AMPA/kainite glutamate receptors. RGCs in P23H rats remain sensitive to local electrical stimulation, generating short-latency responses as in the normal retina. These results provide evidence that, despite the demonstrated RGC degeneration, remaining active RGCs maintain their basic physiological and network properties with some emerging functional changes such as the spontaneous rhythmic activity in late stages of the degenerative disease.
Collapse
|
22
|
Claudepierre T, Paques M, Simonutti M, Buard I, Sahel J, Maue RA, Picaud S, Pfrieger FW. Lack of Niemann-Pick type C1 induces age-related degeneration in the mouse retina. Mol Cell Neurosci 2009; 43:164-76. [PMID: 19883762 DOI: 10.1016/j.mcn.2009.10.007] [Citation(s) in RCA: 59] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2009] [Accepted: 10/17/2009] [Indexed: 11/26/2022] Open
Abstract
Niemann-Pick type C (NPC) disease is an inherited lysosomal storage disease and caused by mutations in Npc1 or Npc2, which mediate cooperatively the egress of cholesterol from lysosomes. The disease entails progressive neurodegeneration, whose cause is poorly understood. Here, we report that Npc1 is distributed in distinct layers of the mouse retina and that its deficiency causes striking retinal degeneration in 2-month-old mice with signs of age-related maculopathies. This includes impaired visual function, accumulation of lipofuscin in the retinal pigment epithelium layer, degeneration of photoreceptor outer segments, disruption of synaptic layers and an increase in autophagy markers in the ganglion cell layer. Moreover, the lack of Npc1 results in the upregulation of proteins that mediate cellular cholesterol release in the retina. Our findings suggest that Npc1 is required for normal retinal function and that its absence may serve as model to study age-related degeneration of the retina.
Collapse
Affiliation(s)
- Thomas Claudepierre
- CNRS UPR 3212, University of Strasbourg, Institute of Cellular and Integrative Neurosciences (INCI), 5, rue Blaise Pascal, F-67084 Strasbourg, France
| | | | | | | | | | | | | | | |
Collapse
|
23
|
Jammoul F, Wang Q, Nabbout R, Coriat C, Duboc A, Simonutti M, Dubus E, Craft CM, Ye W, Collins SD, Dulac O, Chiron C, Sahel JA, Picaud S. Taurine deficiency is a cause of vigabatrin-induced retinal phototoxicity. Ann Neurol 2009; 65:98-107. [PMID: 19194884 DOI: 10.1002/ana.21526] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
OBJECTIVE Although vigabatrin irreversibly constricts the visual field, it remains a potent therapy for infantile spasms and a third-line drug for refractory epilepsies. In albino animals, this drug induces a reduction in retinal cell function, retinal disorganization, and cone photoreceptor damage. The objective of this study was to investigate the light dependence of the vigabatrin-elicited retinal toxicity and to screen for molecules preventing this secondary effect of vigabatrin. METHODS Rats and mice were treated daily with 40 and 3mg vigabatrin, respectively. Retinal cell lesions were demonstrated by assessing cell function with electroretinogram measurements, and quantifying retinal disorganization, gliosis, and cone cell densities. RESULTS Vigabatrin-elicited retinal lesions were prevented by maintaining animals in darkness during treatment. Different mechanisms including taurine deficiency were reported to produce such phototoxicity; we therefore measured amino acid plasma levels in vigabatrin-treated animals. Taurine levels were 67% lower in vigabatrin-treated animals than in control animals. Taurine supplementation reduced all components of retinal lesions in both rats and mice. Among six vigabatrin-treated infants, the taurine plasma level was found to be below normal in three patients and undetectable in two patients. INTERPRETATION These results indicate that vigabatrin generates a taurine deficiency responsible for its retinal phototoxicity. Future studies will investigate whether cotreatment with taurine and vigabatrin can limit epileptic seizures without inducing the constriction of the visual field. Patients taking vigabatrin could gain immediate benefit from reduced light exposures and dietetic advice on taurine-rich foods.
Collapse
Affiliation(s)
- Firas Jammoul
- Institut National de la Sante et de la Recherche Médicale, U592, Institut de la Vision, Paris, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Yang Y, Mohand-Said S, Danan A, Simonutti M, Fontaine V, Clerin E, Picaud S, Léveillard T, Sahel JA. Functional cone rescue by RdCVF protein in a dominant model of retinitis pigmentosa. Mol Ther 2009; 17:787-95. [PMID: 19277021 DOI: 10.1038/mt.2009.28] [Citation(s) in RCA: 124] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
In retinitis pigmentosa (RP), a majority of causative mutations affect genes solely expressed in rods; however, cone degeneration inevitably follows rod cell loss. Following transplantation and in vitro studies, we demonstrated the role of photoreceptor cell paracrine interactions and identified a Rod-derived Cone Viability Factor (RdCVF), which increases cone survival. In order to establish the clinical relevance of such mechanism, we assessed the functional benefit afforded by the injection of this factor in a frequent type of rhodopsin mutation, the P23H rat. In this model of autosomal dominant RP, RdCVF expression decreases in parallel with primary rod degeneration, which is followed by cone loss. RdCVF protein injections induced an increase in cone cell number and, more important, a further increase in the corresponding electroretinogram (ERG). These results indicate that RdCVF can not only rescue cones but also preserve significantly their function. Interestingly, the higher amplitude of the functional versus the survival effect of RdCVF on cones indicates that RdCVF is acting more directly on cone function. The demonstration at the functional level of the therapeutic potential of RdCVF in the most frequent of dominant RP mutations paves the way toward the use of RdCVF for preserving central vision in many RP patients.
Collapse
Affiliation(s)
- Ying Yang
- Université Pierre et Marie Curie-Paris6, UMR-S 592, Paris, France
| | | | | | | | | | | | | | | | | |
Collapse
|
25
|
Guyomard JL, Rosolen SG, Paques M, Delyfer MN, Simonutti M, Tessier Y, Sahel JA, Legargasson JF, Picaud S. A Low-Cost and Simple Imaging Technique of the Anterior and Posterior Segments: Eye Fundus, Ciliary Bodies, Iridocorneal Angle. ACTA ACUST UNITED AC 2008; 49:5168-74. [PMID: 18539931 DOI: 10.1167/iovs.07-1340] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Jean-Laurent Guyomard
- From INSERM, Institut de la Vision, Paris, France;2Universite´ Pierre et Marie Curie (Paris 6), Paris, France
| | - Serge G. Rosolen
- From INSERM, Institut de la Vision, Paris, France;2Universite´ Pierre et Marie Curie (Paris 6), Paris, France;3Fondation Ophtalmologique Adolphe de Rothschild, Paris, France;4Clinique Ve´te´rinaire Voltaire, Asnie`res, France
| | - Michel Paques
- From INSERM, Institut de la Vision, Paris, France;2Universite´ Pierre et Marie Curie (Paris 6), Paris, France;3Fondation Ophtalmologique Adolphe de Rothschild, Paris, France
| | | | - Manuel Simonutti
- From INSERM, Institut de la Vision, Paris, France;2Universite´ Pierre et Marie Curie (Paris 6), Paris, France
| | - Yann Tessier
- Pfizer Global Research and Development, Amboise, France
| | - Jose´ A. Sahel
- From INSERM, Institut de la Vision, Paris, France;2Universite´ Pierre et Marie Curie (Paris 6), Paris, France;3Fondation Ophtalmologique Adolphe de Rothschild, Paris, France;7Centre Hospitalier National d’Ophtalmologie des Quinze-Vingts, Paris, France; an
| | - Jean-Franc¸ois Legargasson
- From INSERM, Institut de la Vision, Paris, France;2Universite´ Pierre et Marie Curie (Paris 6), Paris, France
| | - Serge Picaud
- From INSERM, Institut de la Vision, Paris, France;2Universite´ Pierre et Marie Curie (Paris 6), Paris, France;3Fondation Ophtalmologique Adolphe de Rothschild, Paris, France;8Assistance Publique-Hopitaux de Paris, Paris, France
| |
Collapse
|
26
|
Ellouze S, Augustin S, Bouaita A, Bonnet C, Simonutti M, Forster V, Picaud S, Sahel JA, Corral-Debrinski M. Optimized allotopic expression of the human mitochondrial ND4 prevents blindness in a rat model of mitochondrial dysfunction. Am J Hum Genet 2008; 83:373-87. [PMID: 18771762 DOI: 10.1016/j.ajhg.2008.08.013] [Citation(s) in RCA: 163] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2008] [Revised: 07/11/2008] [Accepted: 08/16/2008] [Indexed: 11/28/2022] Open
Abstract
Mitochondrial diseases due to mutations in mitochondrial DNA can no longer be ignored in most medical areas. With prevalence certainly higher than one in 6000, they probably represent the most common form of metabolic disorders. Despite progress in identification of their molecular mechanisms, little has been done with regard to therapy. We have recently optimized the allotopic expression for the mitochondrial genes ATP6, ND1, and ND4 and obtained a complete and long-lasting rescue of mitochondrial dysfunction in the human fibroblasts in which these genes were mutated. However, biosafety and benefit to mitochondrial function must be validated in animal models prior to clinical applications. To create an animal model of Leber Hereditary Optic Neuropathy (LHON), we introduced the human ND4 gene harboring the G11778A mutation, responsible of 60% of LHON cases, to rat eyes by in vivo electroporation. The treatment induced the degeneration of retinal ganglion cells (RGCs), which were 40% less abundant in treated eyes than in control eyes. This deleterious effect was also confirmed in primary cell culture, in which both RGC survival and neurite outgrowth were compromised. Importantly, RGC loss was clearly associated with a decline in visual performance. A subsequent electroporation with wild-type ND4 prevented both RGC loss and the impairment of visual function. Hence, these data provide the proof-of-principle that optimized allotopic expression can be an effective treatment for LHON, and they open the way to clinical studies on other devastating mitochondrial disorders.
Collapse
Affiliation(s)
- Sami Ellouze
- Institut de la Vision, Université Pierre et Marie Curie-Paris6, Unité mixte de recherche S 592, 17 rue Moreau, Paris F-75012, France
| | | | | | | | | | | | | | | | | |
Collapse
|
27
|
Wang QP, Jammoul F, Duboc A, Gong J, Simonutti M, Dubus E, Craft CM, Ye W, Sahel JA, Picaud S. Treatment of epilepsy: the GABA-transaminase inhibitor, vigabatrin, induces neuronal plasticity in the mouse retina. Eur J Neurosci 2008; 27:2177-87. [PMID: 18412635 DOI: 10.1111/j.1460-9568.2008.06175.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Vigabatrin was a major drug in the treatment of epilepsy until the discovery that it was associated with an irreversible constriction of the visual field. Nevertheless, the drug is still prescribed for infantile spasms and refractory epilepsy. Disorganization of the photoreceptor nuclear layer and cone photoreceptor damage have been described in albino rats. To investigate the vigabatrin-elicited retinal toxicity further, we examined the retinal tissue of albino mice treated with two vigabatrin doses. The higher dose did not always cause the photoreceptor layer disorganization after 1 month of treatment. However, it triggered a massive synaptic plasticity in retinal areas showing a normal layering of the retina. This plasticity was shown by the withdrawal of rod but not cone photoreceptor terminals from the outer plexiform layers towards their cell bodies. Furthermore, both rod bipolar cells and horizontal cells exhibited dendritic sprouting into the photoreceptor nuclear layer. Withdrawing rod photoreceptors appeared to form ectopic contacts with growing postsynaptic dendrites. Indeed, contacts between rods and bipolar cells, and between bipolar cells and horizontal cells were observed deep inside the outer nuclear layer. This neuronal plasticity is highly suggestive of an impaired glutamate release by photoreceptors because similar observations have been reported in different genetically modified mice with deficient synaptic transmission. Such a synaptic deficit is consistent with the decrease in glutamate concentration induced by vigabatrin. This description of the neuronal plasticity associated with vigabatrin provides new insights into its retinal toxicity in epileptic patients.
Collapse
Affiliation(s)
- Qing-Ping Wang
- INSERM UMRS-592, Laboratoire de Physiopathologie Cellulaire et Moléculaire de la Rétine, Paris, France
| | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Guyomard J, Rosolen S, Paques M, Delyfer M, Simonutti M, Sahel J, Legargasson J, Picaud S. 156 À propos d’une technique d’imagerie simple et peu onéreuse pour l’examen des structures oculaires : fond d’œil, corps ciliaires, angle irido-cornéen et angiographie fluorescéinique. J Fr Ophtalmol 2008. [DOI: 10.1016/s0181-5512(08)70752-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
|
29
|
Paques M, Guyomard JL, Simonutti M, Roux MJ, Picaud S, Legargasson JF, Sahel JA. Panretinal, high-resolution color photography of the mouse fundus. Invest Ophthalmol Vis Sci 2007; 48:2769-74. [PMID: 17525211 DOI: 10.1167/iovs.06-1099] [Citation(s) in RCA: 94] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
PURPOSE To analyze high-resolution color photographs of the mouse fundus. METHODS A contact fundus camera based on topical endoscopy fundus imaging (TEFI) was built. Fundus photographs of C57 and Balb/c mice obtained by TEFI were qualitatively analyzed. RESULTS High-resolution digital imaging of the fundus, including the ciliary body, was routinely obtained. The reflectance and contrast of retinal vessels varied significantly with the amount of incident and reflected light and, thus, with the degree of fundus pigmentation. The combination of chromatic and spherical aberration favored blue light imaging, in term of both field and contrast. CONCLUSIONS TEFI is a small, low-cost system that allows high-resolution color fundus imaging and fluorescein angiography in conscious mice. Panretinal imaging is facilitated by the presence of the large rounded lens. TEFI significantly improves the quality of in vivo photography of retina and ciliary process of mice. Resolution is, however, affected by chromatic aberration, and should be improved by monochromatic imaging.
Collapse
Affiliation(s)
- Michel Paques
- Department of Ophthalmology, Université Pierre et Marie Curie-Paris 6, Paris, France.
| | | | | | | | | | | | | |
Collapse
|
30
|
Gaucher D, Chiappore JA, Pâques M, Simonutti M, Boitard C, Sahel JA, Massin P, Picaud S. Microglial changes occur without neural cell death in diabetic retinopathy. Vision Res 2006; 47:612-23. [PMID: 17267004 DOI: 10.1016/j.visres.2006.11.017] [Citation(s) in RCA: 91] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2006] [Revised: 07/29/2006] [Accepted: 11/08/2006] [Indexed: 11/28/2022]
Abstract
Very early neuroglial changes have been observed to precede major vascular changes in the retina of diabetic patients and animal models. We investigated the sequence of these neuroglial changes further, in mice with alloxan-induced diabetes. Diabetes was induced by a single injection of Alloxan into C57/Bl6 mice, which subsequently received daily insulin injections. Diabetic and control animals were weighed and their blood glucose levels were determined weekly. Electroretinographic recordings and scanner laser ophthalmoscope (SLO) examinations were carried out 15 days, one month and three months after the onset of diabetes. Diabetes induction was confirmed by the presence of glucose in the urine, a tripling of blood glucose level, weight loss and an increase in glycated haemoglobin levels. Three months after diabetes onset, the electroretinogram b/a wave amplitude ratio was decreased at the highest light intensities and oscillatory potentials were delayed. The retinal fundus and vessels remained unchanged. No cell apoptosis was detected in vertical and horizontal sections of the retina by TUNEL or immunocytochemistry for the active caspase 3. No increase in GFAP-immunostaining indicative of a glial reaction was observed in Müller glial cells. By contrast, changes in the morphology of microglial cells were observed, with marked shortening of the dendrites. Thus, the microglial reaction occurs very early in progression to diabetic retinopathy, at about the same time as early electroretinographic modifications. The absence of apoptotic cells, contrasting with previous results in mice with streptozotocin-induced diabetes, is consistent with insulin neuroprotection.
Collapse
Affiliation(s)
- David Gaucher
- INSERM U-592, Hôpital St. Antoine, Laboratoire de Physiopathologie Cellulaire et Moléculaire de la Rétine, Bâtiment Kourilsky, and Université Pierre et Marie Curie Paris-6, Paris, France
| | | | | | | | | | | | | | | |
Collapse
|
31
|
Salzmann J, Linderholm OP, Guyomard JL, Paques M, Simonutti M, Lecchi M, Sommerhalder J, Dubus E, Pelizzone M, Bertrand D, Sahel J, Renaud P, Safran AB, Picaud S. Subretinal electrode implantation in the P23H rat for chronic stimulations. Br J Ophthalmol 2006; 90:1183-7. [PMID: 16754649 PMCID: PMC1857388 DOI: 10.1136/bjo.2005.089110] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
BACKGROUND In age related macular degeneration and inherited dystrophies, preservation of retinal ganglion cells has been demonstrated. This finding has led to the development of various models of subretinal or epiretinal implant in order to restore vision. This study addresses the development of a polyimide subretinal electrode platform in the dystrophic P23H rat in vivo. METHODS A technique was developed for implanting a subretinal electrode into the subretinal space and stabilising the distal extremity of the cabling on the rat cranium in order to allow future electrical stimulations of the retina. RESULTS In vivo imaging of the retina with the scanning laser ophthalmoscope demonstrated reabsorption of the surgically induced retinal detachment and the absence of major tissue reactions. These in vivo observations were confirmed by retinal histology. The extraocular fixation system on the rat cranium was effective in stabilising the distal connector for in vivo stimulation. CONCLUSION This study demonstrates that a retinal implant can be introduced into the subretinal space of a dystrophic rat with a stable external connection for repeatable electrical measurements and stimulation. This in vivo model should therefore allow us to evaluate the safety and efficacy of electrical stimulations on dystrophic retina.
Collapse
Affiliation(s)
- J Salzmann
- Service d'Opthalmologie Hôpitaux Universitaires de Genève, Switzerland
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Paques M, Simonutti M, Roux MJ, Picaud S, Levavasseur E, Bellman C, Sahel JA. High resolution fundus imaging by confocal scanning laser ophthalmoscopy in the mouse. Vision Res 2006; 46:1336-45. [PMID: 16289196 DOI: 10.1016/j.visres.2005.09.037] [Citation(s) in RCA: 60] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2005] [Revised: 09/15/2005] [Accepted: 09/28/2005] [Indexed: 10/25/2022]
Abstract
We evaluated fundus imaging using a modified confocal scanning laser ophthalmoscope (cSLO) in mice. Examinations were performed in conscious, untrained mice. The largest field of view measured 1,520 x 1,520 mu, with a significant interindividual variability, itself correlated to biometric variability. The composite field of view extended up to the ora serrata. The reflectance imaging associated light reflection from nerve fiber bundles and vessel walls, and absorption by hemoglobin and melanin. Light absorption by the pigment epithelium indeed increased the contrast of the nerve fiber layer, but impaired viewing of the choroid. Due to the confocal mode, fluorescence angiograms with clear separation of retinal and choroidal fluorescence could be obtained even in albino mice. Micrometric-scale transverse resolution and several planes of optical sectioning within the retina were obtained. This permitted for instance tridimensional, subcellular viewing of gfp-expressing retinal microglial cells in CX(3)CR1 mice. We concluded that cSLO is a promising tool for noninvasive, multimodal intravital microscopy of the fundus in the mouse.
Collapse
Affiliation(s)
- Michel Paques
- Laboratory of Cellular and Molecular Physiopathology of the Retina, National Institute for Health and Medical Research, INSERM Unité 592, Paris, France.
| | | | | | | | | | | | | |
Collapse
|
33
|
Andrieu-Soler C, Aubert-Pouëssel A, Doat M, Picaud S, Halhal M, Simonutti M, Venier-Julienne MC, Benoit JP, Behar-Cohen F. Intravitreous injection of PLGA microspheres encapsulating GDNF promotes the survival of photoreceptors in the rd1/rd1 mouse. Mol Vis 2005; 11:1002-11. [PMID: 16319820] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/05/2023] Open
Abstract
PURPOSE To evaluate the potential delay of the retinal degeneration in rd1/rd1 mice using recombinant human glial cell line-derived neurotrophic factor (rhGDNF) encapsulated in poly(D,L-lactide-co-glycolide) (PLGA) microspheres. METHODS rhGDNF-loaded PLGA microspheres were prepared using a water in oil in water (w/o/w) emulsion solvent extraction-evaporation process. In vitro, the rhGDNF release profile was assessed using radiolabeled factor. In vivo, rhGDNF microspheres, blank microspheres, or microspheres loaded with inactivated rhGDNF were injected into the vitreous of rd1/rd1 mice at postnatal day 11 (PN11). The extent of retinal degeneration was examined at PN28 using rhodopsin immunohistochemistry on whole flat-mount retinas, outer nuclear layer (ONL) cell counting on histology sections, and electroretinogram tracings. Immunohistochemical reactions for glial fibrillary acidic protein (GFAP), F4/80, and rhodopsin were performed on cryosections. RESULTS Significant delay of rod photoreceptors degeneration was observed in mice receiving the rhGDNF-loaded microspheres compared to either untreated mice or to mice receiving blank or inactivated rhGDNF microspheres. The degeneration delay in the eyes receiving the rhGDNF microspheres was illustrated by the increased rhodopsin positive signals, the preservation of significantly higher number of cell nuclei within the ONL, and significant b-wave increase. A reduction of the subretinal glial proliferation was also observed in these treated eyes. No significant intraocular inflammatory reaction was observed after the intravitreous injection of the various microspheres. CONCLUSIONS A single intravitreous injection of rhGDNF-loaded microspheres slows the retinal degeneration processes in rd1/rd1 mice. The use of injectable, biodegradable polymeric systems in the vitreous enables the efficient delivery of therapeutic proteins for the treatment of retinal diseases.
Collapse
|
34
|
Delyfer MN, Simonutti M, Neveux N, Léveillard T, Sahel JA. Does GDNF exert its neuroprotective effects on photoreceptors in the rd1 retina through the glial glutamate transporter GLAST? Mol Vis 2005; 11:677-87. [PMID: 16163265] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/04/2023] Open
Abstract
PURPOSE We previously demonstrated that exogenous glial cell line-derived neurotrophic factor (GDNF) induces histological and functional protection of photoreceptors in the retinal degeneration (rd1) mouse model. The mechanisms underlying such neuroprotection remain elusive. In parallel to this work, we provided evidence for the occurrence of glutamate-mediated excitotoxic phenomena contributing to rod photoreceptor death in the rd1 retina in the companion paper. In the present study, we investigated whether, as demonstrated in other models, GDNF could exert its neuroprotective effect on photoreceptors through Müller glial cells (MGC) by promoting the expression of the glial L-glutamate/L-aspartate transporter (GLAST), an endogenous neuroprotective mechanism against glutamate-mediated excitotoxicity. METHODS Reverse transcription-polymerase chain reaction (RT-PCR) was used to compare the mRNA expression levels of GDNF receptors between rd1 and wild-type mouse retinas as well as between MGC and mixed retinal cell cultures. Recombinant GDNF was applied to pure MGC cultures, to rd1 retinal organ cultures and injected subretinally into rd1 mouse eyes. GLAST expression following GDNF treatment was measured by RT-PCR, immunoblotting and immunohistochemistry. Free glutamate and glutamine levels were quantified in rd1 retinas after GDNF or control treatment using an amino acid analyzer. RESULTS mRNA expression studies of GDNF receptors, GFRalpha-1 and Ret, demonstrated that GDNF receptors were not exclusively expressed by the degenerating photoreceptor cells but mainly by MGC. Exogenous GDNF application to MGC cultures, rd1 mouse retinal explants and in vivo rd1 mouse retinas increased the expression of GLAST by 48% in retinal explants (p<0.005) and by 25% in vivo (p<0.0005). GLAST protein expression in MGC was particularly increased around degenerative photoreceptors. Free glutamate and glutamine levels in the rd1 retina were not significantly modified by exogenous GDNF. CONCLUSIONS Our data suggest that, in the rd1 mouse retina, GDNF neuroprotective effect on photoreceptors can be mediated indirectly through the activation of MGC. We demonstrate that injection of recombinant GDNF enhances the expression of GLAST and more particularly around the degenerating photoreceptors. Since we failed to demonstrate that GDNF decreases free glutamate levels, we could not ascertain whether GDNF promoted photoreceptor-survival via an increase of glutamate uptake and, therefore, a change in glutamate distribution.
Collapse
Affiliation(s)
- Marie-Noëlle Delyfer
- Laboratoire de Physiopathologie Cellulaire et Moléculaire de la Rétine, Institut National de la Santé et de la Recherche Médicale (Inserm U592), Université Pierre et Marie Curie, Paris, France.
| | | | | | | | | |
Collapse
|
35
|
Grieve K, Dubois A, Simonutti M, Paques M, Sahel J, Le Gargasson JF, Boccara C. In vivo anterior segment imaging in the rat eye with high speed white light full-field optical coherence tomography. Opt Express 2005; 13:6286-95. [PMID: 19498641 DOI: 10.1364/opex.13.006286] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
We present a new high speed full-field optical coherence tomography (OCT) instrument, the first full-field OCT system that is capable of in vivo ocular imaging. An isotropic resolution of ~ 1 mum is achieved thanks to the use of a xenon arc lamp source and relatively high numerical aperture microscope objectives in a Linnik-type interferometer. Full-field illumination allows the capture of two-dimensional en face images in parallel, using a fast CMOS camera as detector array. Each en face image is acquired in a 4 ms period, at a maximum repetition rate of 250 Hz. Detection sensitivity per en face image is 71 dB. Higher sensitivity can be achieved by image correlation and averaging, although frame rate is reduced. We present the first preliminary results of in vivo imaging in the anterior segment of the rat eye, which reveal some cellular features in the corneal layers.
Collapse
|
36
|
Paques M, Simonutti M, Levavasseur E, Saulnier V, Sahel J. 033 Occlusion veineuse rétinienne chez le rongeur : corrélation fundoscopique et histologique. J Fr Ophtalmol 2005. [DOI: 10.1016/s0181-5512(05)74429-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
37
|
Léveillard T, Mohand-Saïd S, Lorentz O, Hicks D, Fintz AC, Clérin E, Simonutti M, Forster V, Cavusoglu N, Chalmel F, Dollé P, Poch O, Lambrou G, Sahel JA. Identification and characterization of rod-derived cone viability factor. Nat Genet 2004; 36:755-9. [PMID: 15220920 DOI: 10.1038/ng1386] [Citation(s) in RCA: 293] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2003] [Accepted: 05/17/2004] [Indexed: 11/09/2022]
Abstract
Retinitis pigmentosa is an untreatable, inherited retinal disease that leads to blindness. The disease initiates with the loss of night vision due to rod photoreceptor degeneration, followed by irreversible, progressive loss of cone photoreceptor. Cone loss is responsible for the main visual handicap, as cones are essential for day and high-acuity vision. Their loss is indirect, as most genes associated with retinitis pigmentosa are not expressed by these cells. We previously showed that factors secreted from rods are essential for cone viability. Here we identified one such trophic factor by expression cloning and named it rod-derived cone viability factor (RdCVF). RdCVF is a truncated thioredoxin-like protein specifically expressed by photoreceptors. The identification of this protein offers new treatment possibilities for retinitis pigmentosa.
Collapse
Affiliation(s)
- Thierry Léveillard
- Laboratoire de Physiopathologie Cellulaire et Moléculaire et de la Rétine, Inserm U592, Université Pierre et Marie Curie, Hôpital St-Antoine, 184 rue du Faubourg St-Antoine, 75571, Paris cedex 12, France
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Mori M, Metzger D, Picaud S, Hindelang C, Simonutti M, Sahel J, Chambon P, Mark M. Retinal dystrophy resulting from ablation of RXR alpha in the mouse retinal pigment epithelium. Am J Pathol 2004; 164:701-10. [PMID: 14742273 PMCID: PMC1602254 DOI: 10.1016/s0002-9440(10)63157-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Vitamin A (retinol) actions in eye development are mediated by retinoic acid receptors (RARs and RXRs). Using the Cre/loxP system, we have selectively ablated RXR alpha in the retinal pigment epithelium (RPE), a cell monolayer critically involved in visual retinoid renewal and phagocytosis of photoreceptor outer segments. In the mutant (RXR alpha (rpe-/-)) mice, RPE cells are morphologically and functionally abnormal and display decreased expression of proteins involved in the visual retinoid cycle, namely RPE65, CRALBP, and RGR. RXR alpha (rpe-/-) mice also show alterations of photoreceptor cells including: 1) decrease in their number; 2) outer segment shortening and disorganization, and 3) reduced light responses in electroretinograms. These results indicate that RXR alpha is required for normal maturation of the RPE, which is known to play essential roles in photoreceptor cell function and survival, and point to a possible involvement of RXR alpha signaling pathways in the RPE in human retinal diseases.
Collapse
Affiliation(s)
- Mikiro Mori
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, Centre National de la Recherche Scientifique, Institut National de la Santé et de la Recherche Médicale, Université Louis Pasteur, Collège de France, Strasbourg, France
| | | | | | | | | | | | | | | |
Collapse
|
39
|
Genevois O, Paques M, Simonutti M, Sercombe R, Seylaz J, Gaudric A, Brouland JP, Sahel J, Vicaut E. Microvascular Remodeling after Occlusion-Recanalization of a Branch Retinal Vein in Rats. ACTA ACUST UNITED AC 2004; 45:594-600. [PMID: 14744903 DOI: 10.1167/iovs.03-0764] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
PURPOSE To describe the time course of microvascular changes after transient branch retinal vein occlusion (BRVO) in rats. METHODS BRVO was induced in pigmented rats by focal laser photocoagulation. The subsequent changes in the retinal angiogram were followed up, both in vivo by confocal scanning laser ophthalmoscopy and ex vivo by confocal microscopy. RESULTS At day 1, capillary closure affected the three microvessel layer differentially, the intermediary layer being the most affected. Collateral veins, which were initiated by the dilation of deep-layer venules, pursued their course below adjacent arteries. These microvascular changes peaked between days 1 and 3. After recanalization at day 3, microvascular changes regressed gradually but incompletely, and at day 30 capillary closure and venule dilation persisted. CONCLUSIONS Transient occlusion of a retinal vein in rats leads to short- and long-term microvascular remodeling upstream of the occlusion site. This study describes a model for the tridimensional arrangement of retinal microvessel that accounts for the topography of the early capillary closure and collateral vessel formation that occur after BRVO. In the long term, these changes regressed incompletely, with recanalization of the occluded vein, suggesting that after a short period of occlusion, microvascular changes may become at least partially independent of flow. Despite the intrinsically limited applicability of this model to human vein occlusion, the results suggest that even if therapeutic decompression of an occluded vein is performed early, it may not reverse capillary dropout completely.
Collapse
Affiliation(s)
- Olivier Genevois
- Microcirculation Laboratory, Hôpital Fernand Widal, Paris France
| | | | | | | | | | | | | | | | | |
Collapse
|
40
|
Duboc A, Hanoteau N, Simonutti M, Rudolf G, Nehlig A, Sahel JA, Picaud S. Vigabatrin, the GABA-transaminase inhibitor, damages cone photoreceptors in rats. Ann Neurol 2004; 55:695-705. [PMID: 15122710 DOI: 10.1002/ana.20081] [Citation(s) in RCA: 53] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Epileptic patients experienced an irreversible loss of their peripheral visual field upon treatment with vigabatrin (gamma-vinyl GABA), an inhibitor of the GABA degrading enzyme, GABA transaminase. Subsequently, central visual function was reported to also be irreversibly altered. This visual loss is associated with a decrease in the electroretinogram measurement localizing the deficit to the retina. To investigate its cellular origin, we treated rats daily with vigabatrin for 45 days. Two days after arresting this treatment, rats exhibited an irreversible decrease in the photopic electroretinogram, the flicker response, and the oscillatory potentials. These functional alterations were associated with a peripheral disorganization of the outer retina. However, photoreceptor damage was not limited to these disorganized areas, but cone inner and outer segments were severely injured in more central areas and their numbers were irreversibly decreased by 17 to 20%. Ultrastructural examination of the retina confirmed the presence of major photoreceptor damages, which were further supported by terminal deoxynucleotidyltransferase-mediated dUTP nick end labeling (TUNEL) and caspase-3 activation both indicative of photoreceptor apoptosis. This study suggests that the visual field loss in vigabatrin-treated epileptic patients may result from a sequence of events starting from cone cell injury to a more severe disorganization of the photoreceptor layer.
Collapse
Affiliation(s)
- Agnès Duboc
- Laboratoire de Physiopathologie Cellulaire et Moléculaire de la Rétine, INSERM U-592, UPMC, Bâtiment Kourislky, Paris Cedex 12, Paris, France
| | | | | | | | | | | | | |
Collapse
|
41
|
Frasson M, Picaud S, Léveillard T, Simonutti M, Mohand-Said S, Dreyfus H, Hicks D, Sabel J. Glial cell line-derived neurotrophic factor induces histologic and functional protection of rod photoreceptors in the rd/rd mouse. Invest Ophthalmol Vis Sci 1999; 40:2724-34. [PMID: 10509671] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/14/2023] Open
Abstract
PURPOSE To evaluate the neuroprotective potential of glial cell line-derived neurotrophic factor (GDNF) in the retinal degeneration (rd/rd) mouse model of human retinitis pigmentosa. METHODS Subretinal injections of GDNF were made into rd/rd mice at 13 and 17 days of age and electroretinograms (ERGs) recorded at 22 days. Control mice received saline vehicle injections or underwent no procedure. At 23 days of age, retinas from treated and control mice were fixed and processed for wholemount immunohistochemistry using an anti-rod opsin antibody, and rod numbers were estimated using an unbiased stereological systematic random approach. Subsequent to counting, immunolabeled retinas were re-embedded and sectioned in a transverse plane and the numbers of rods recalculated. RESULTS Although ERGs could not be recorded from sham-operation or nonsurgical rd/rd mice at 22 days of age, detectable responses (both a- and b-waves) were observed in 4 of 10 GDNF-treated mice. Stereological assessment of immunolabeled rods at 23 days showed that control rd/rd retinas contained 41,880+/-3,890 (mean +/- SEM; n = 6), phosphate-buffered saline (PBS)-injected retinas contained 61,165+/-4,932 (n = 10; P < 0.001 versus control retinas) and GDNF-injected retinas contained 89,232+/-8,033 (n = 10; P < 0.001 versus control retinas, P < 0.002 versus PBS). This increase in rod numbers after GDNF treatment was confirmed by cell counts obtained from frozen sections. CONCLUSIONS GDNF exerts both histologic and functional neuroprotective effects on rod photoreceptors in the rd/rd mouse. Thus rescue was demonstrated in an animal model of inherited retinal degeneration in which the gene defect was located within the rods themselves, similar to most forms of human retinitis pigmentosa. GDNF represents a candidate neurotrophic factor for palliating some forms of hereditary human blindness.
Collapse
Affiliation(s)
- M Frasson
- Laboratoire de Physiopathologie Rétinienne, Clinique Ophthalmologique, Université Louis Pasteur, Centre Hospitalier Régional Universitaire, Strasbourg, France
| | | | | | | | | | | | | | | |
Collapse
|
42
|
Frasson M, Sahel JA, Fabre M, Simonutti M, Dreyfus H, Picaud S. Retinitis pigmentosa: rod photoreceptor rescue by a calcium-channel blocker in the rd mouse. Nat Med 1999; 5:1183-7. [PMID: 10502823 DOI: 10.1038/13508] [Citation(s) in RCA: 177] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Retinitis pigmentosa is an inherited degenerative disease of photoreceptors leading to blindness. A well-characterized model for this disease is provided by the retinal degeneration mouse, in which the gene for the rod cGMP phosphodiesterase is mutated, as in some affected human families. We report that D-cis-diltiazem, a calcium-channel blocker that also acts at light-sensitive cGMP-gated channels, rescued photoreceptors and preserved visual function in the retinal degeneration mouse. The long record of diltiazem prescription in cardiology should facilitate the design of clinical trials for some forms of retinitis pigmentosa.
Collapse
Affiliation(s)
- M Frasson
- Laboratoire de Physiopathologie Cellulaire et Moléculaire de la Rétine, Médicale A, BP 426, 1 place de l'hôpital, Université Louis Pasteur, 67091 Strasbourg, France
| | | | | | | | | | | |
Collapse
|
43
|
Mohand-Said S, Deudon-Combe A, Hicks D, Simonutti M, Forster V, Fintz AC, Léveillard T, Dreyfus H, Sahel JA. Normal retina releases a diffusible factor stimulating cone survival in the retinal degeneration mouse. Proc Natl Acad Sci U S A 1998; 95:8357-62. [PMID: 9653191 PMCID: PMC20980 DOI: 10.1073/pnas.95.14.8357] [Citation(s) in RCA: 127] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The role of cellular interactions in the mechanism of secondary cone photoreceptor degeneration in inherited retinal degenerations in which the mutation specifically affects rod photoreceptors was studied. We developed an organ culture model of whole retinas from 5-week-old mice carrying the retinal degeneration mutation, which at this age contain few remaining rods and numerous surviving cones cocultured with primary cultures of mixed cells from postnatal day 8 normal-sighted mice (C57BL/6) retinas or retinal explants from normal (C57BL/6) or dystrophic (C3H/He) 5-week-old mice. After 7 days, the numbers of residual cone photoreceptors were quantified after specific peanut lectin or anti-arrestin antibody labeling by using an unbiased stereological approach. Examination of organ cultured retinas revealed significantly greater numbers of surviving cones (15-20%) if cultured in the presence of retinas containing normal rods as compared with controls or cocultures with rod-deprived retinas. These data indicate the existence of a diffusible trophic factor released from retinas containing rod cells and acting on retinas in which only cones are present. Because cones are responsible for high acuity and color vision, such data could have important implications not only for eventual therapeutic approaches to human retinal degenerations but also to define interactions between retinal photoreceptor types.
Collapse
Affiliation(s)
- S Mohand-Said
- Laboratoire de Physiopathologie Rétinienne, Université Louis Pasteur, Clinique Ophtalmologique, Centre Hospitalier et Universitaire, BP 426, 1, Place de l'Hôpital, 67091 Strasbourg Cedex, France
| | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Mohand-Said S, Hicks D, Simonutti M, Tran-Minh D, Deudon-Combe A, Dreyfus H, Silverman MS, Ogilvie JM, Tenkova T, Sahel J. Photoreceptor transplants increase host cone survival in the retinal degeneration (rd) mouse. Ophthalmic Res 1997; 29:290-7. [PMID: 9323720 DOI: 10.1159/000268027] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Retinal transplants offer a potentially interesting approach to treating human retinal degenerations, but so far little quantitative data are available on possible beneficial effects. We isolated photoreceptor layers from normal-sighted mice and grafted them into the subretinal space of retinal degeneration (rd) mice lacking rod photoreceptors. At 2 weeks after surgery, the numbers of residual host cone photoreceptors outside the graft zone were quantified following specific labelling. Examination of operated retinas revealed highly significantly greater numbers of surviving cones (mean of 38% more at 2 weeks) within the central field compared to sham-operated paired control retinas (p < 0.01). These are the first quantified data indicating a trophic effect of transplanted photoreceptors upon host cone cells. As cone cells are responsible for high acuity and colour vision, such data could have important implications not only for eventual therapeutic approaches to human retinal degenerations but also to understanding underlying interactions between retinal photoreceptors.
Collapse
Affiliation(s)
- S Mohand-Said
- Laboratoire de Physiopathologie Rétinienne INSERM CJF 92/02-ULP, Centre Hospitalier et Universitaire, Strasbourg, France
| | | | | | | | | | | | | | | | | | | |
Collapse
|
45
|
|
46
|
Vailati G, Montini M, Simonutti M, Nosari I, Pagani G. [The clinical use of bis-(hydroxy-ethyl-thio)-1,10-decane in the treatment of hyperlipemic and dyslipemic conditions]. Clin Ter 1978; 85:361-73. [PMID: 668273] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
|
47
|
Montini M, Ongaro A, Simonutti M. [Controlled clinical study and clinico-psychological evaluation of a preparation with neurotrophic effects]. Clin Ter 1977; 82:243-62. [PMID: 334449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|