1
|
Attallah A, Ardourel M, Gallazzini F, Lesne F, De Oliveira A, Togbé D, Briault S, Perche O. Lack of FMRP in the retina: Evidence of a retinal specific transcriptomic profile. Exp Eye Res 2024; 246:110015. [PMID: 39089568 DOI: 10.1016/j.exer.2024.110015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2024] [Revised: 07/11/2024] [Accepted: 07/30/2024] [Indexed: 08/04/2024]
Abstract
Fragile X Syndrome (FXS), the most common inherited form of human intellectual disability, is a monogenic neurodevelopmental disorder caused by a loss-of-function mutation of the FMR1 gene. FMR1 is encoding the Fragile X Messenger Ribonucleo Protein (FMRP) an RNA-binding protein that regulates the translation of synaptic proteins. The absence of FMRP expression has many important consequences on synaptic plasticity and function, leading to the FXS clinical phenotype. Over the last decade, a visual neurosensorial phenotype had been described in the FXS patients as well as in the murine model (Fmr1-/ymice), characterized by retinal deficits associated to retinal perception alterations. However, although the transcriptomic profile in the absence of FMRP has been studied in the cerebral part of the central nervous system (CNS), there are no actual data for the retina which is an extension of the CNS. Herein, we investigate the transcriptomic profile of mRNA from whole retinas of Fmr1-/ymice. Interestingly, we found a specific signature of Fmrp absence on retinal mRNA expression with few common genes compared to other brain studies. Gene Ontology on these retinal specific genes demonstrated an enrichment in retinal development genes as well as in synaptic genes. These alterations could be linked to the reported retinal phenotype of the FXS condition. In conclusion, we describe for the first time, retinal-specific transcriptomic changes in the absence of FMRP.
Collapse
Affiliation(s)
- Amir Attallah
- Orléans University, University Hospital Center of Orleans, LI(2)RSO, 14, Avenue de l'hôpital, 45100, Orléans, France; Orleans University, CNRS, laboratoire INEM, UMR7355, 3b Rue de la Férollerie, F-45071, Orléans, Cedex 2, France; ART ARNm US55, 14 Avenue de l'Hôpital, 45100, Orléans, France
| | - Maryvonne Ardourel
- Orléans University, University Hospital Center of Orleans, LI(2)RSO, 14, Avenue de l'hôpital, 45100, Orléans, France; ART ARNm US55, 14 Avenue de l'Hôpital, 45100, Orléans, France
| | - Felix Gallazzini
- University Hospital Center of Orleans, Genetic Department, 14 Avenue de l'Hôpital, 45100, Orléans, France
| | - Fabien Lesne
- University Hospital Center of Orléans CAR&IB, Pôle Biopatholgie, 14 Avenue de l'Hôpital, 45100, Orléans, France
| | - Anthony De Oliveira
- University Hospital Center of Orléans CAR&IB, Pôle Biopatholgie, 14 Avenue de l'Hôpital, 45100, Orléans, France
| | - Dieudonnée Togbé
- Orleans University, CNRS, laboratoire INEM, UMR7355, 3b Rue de la Férollerie, F-45071, Orléans, Cedex 2, France
| | - Sylvain Briault
- Orléans University, University Hospital Center of Orleans, LI(2)RSO, 14, Avenue de l'hôpital, 45100, Orléans, France; ART ARNm US55, 14 Avenue de l'Hôpital, 45100, Orléans, France; University Hospital Center of Orleans, Genetic Department, 14 Avenue de l'Hôpital, 45100, Orléans, France
| | - Olivier Perche
- Orléans University, University Hospital Center of Orleans, LI(2)RSO, 14, Avenue de l'hôpital, 45100, Orléans, France; ART ARNm US55, 14 Avenue de l'Hôpital, 45100, Orléans, France; University Hospital Center of Orleans, Genetic Department, 14 Avenue de l'Hôpital, 45100, Orléans, France.
| |
Collapse
|
2
|
Attallah A, Ardourel M, Lesne F, De Oliveira A, Felgerolle C, Briault S, Ranchon-Cole I, Perche O. Dietary supplement enriched in antioxidants and omega-3 promotes retinal glutamine synthesis. Exp Eye Res 2024; 245:109964. [PMID: 38851478 DOI: 10.1016/j.exer.2024.109964] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2024] [Revised: 05/07/2024] [Accepted: 06/05/2024] [Indexed: 06/10/2024]
Abstract
To prevent ocular pathologies, new generation of dietary supplements have been commercially available. They consist of nutritional supplement mixing components known to provide antioxidative properties, such as unsaturated fatty acid, resveratrol or flavonoids. However, to date, few data evaluating the impact of a mixture mainly composed of those components (Nutrof Total®) on the retina are available. Only one in-vivo preclinical study demonstrated that dietary supplementation (DS) prevents the retina from light-induced retinal degeneration; and only one in-vitro study on Müller cells culture showed that glutamate metabolism cycle was key in oxidative stress response. Therefore, we raised the question about the in-vivo effect of DS on glutamate metabolism in the retina. Herein, we showed that the dietary supplementation promotes in-vivo increase of retinal glutamine amount through a higher glutamine synthesis as observed in-vitro on Muller cells. Therefore, we can suggest that the promotion of glutamine synthesis is part of the protective effect of DS against retinal degeneration, acting as a preconditioning mechanism against retinal degeneration.
Collapse
Affiliation(s)
- Amir Attallah
- Université D'Orléans, CHU D'Orléans, LI(2)RSO, 14, Avenue de L'hôpital, 45100, Orléans, France; Université D'Orléans, CNRS, Laboratoire INEM, UMR7355, 3b Rue de La Ferollerie, F-45071, Orléans, Cedex 2, France
| | - Maryvonne Ardourel
- Université D'Orléans, CHU D'Orléans, LI(2)RSO, 14, Avenue de L'hôpital, 45100, Orléans, France; Université D'Orléans, CNRS, Laboratoire INEM, UMR7355, 3b Rue de La Ferollerie, F-45071, Orléans, Cedex 2, France
| | - Fabien Lesne
- CHU D'Orléans CARIB, Pôle Biopatholgie, L, 14 Avenue de L'Hôpital, 45100, Orléans, France
| | - Anthony De Oliveira
- CHU D'Orléans CARIB, Pôle Biopatholgie, L, 14 Avenue de L'Hôpital, 45100, Orléans, France
| | - Chloé Felgerolle
- Université D'Orléans, CNRS, Laboratoire INEM, UMR7355, 3b Rue de La Ferollerie, F-45071, Orléans, Cedex 2, France
| | - Sylvain Briault
- Université D'Orléans, CHU D'Orléans, LI(2)RSO, 14, Avenue de L'hôpital, 45100, Orléans, France; CHU D'Orléans, Département de Génétique, 14 Avenue de L'Hôpital, 45100, Orléans, France
| | - Isabelle Ranchon-Cole
- Université Clermont Auvergne, CHU Clermont-Ferrand, Inserm, Neuro-Dol, F-63000, Clermont-Ferrand, France
| | - Olivier Perche
- Université D'Orléans, CHU D'Orléans, LI(2)RSO, 14, Avenue de L'hôpital, 45100, Orléans, France; CHU D'Orléans, Département de Génétique, 14 Avenue de L'Hôpital, 45100, Orléans, France.
| |
Collapse
|
3
|
Ardourel M, Ranchon-Cole I, Pâris A, Felgerolle C, Acar N, Lesne F, Briault S, Perche O. FMR protein: Evidence of an emerging role in retinal aging? Exp Eye Res 2022; 225:109282. [PMID: 36265576 DOI: 10.1016/j.exer.2022.109282] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2022] [Revised: 10/05/2022] [Accepted: 10/11/2022] [Indexed: 12/29/2022]
Abstract
Aging is a multifactorial process that affects the entire organism by cumulative alterations. Visual function impairments that go along with aging are commonly observed, causing lower visual acuity, lower contrast sensitivity, and impaired dark adaptation. Electroretinogram analysis revealed that the amplitudes of rod- and cone-mediated responses are reduced in aged mice and humans. Reports suggested that age-related changes observed in both rod and cone photoreceptor functionality were linked to oxidative stress regulation or free radical production homeostasis. Interestingly, several recent reports linked the fragile X mental retardation protein (FMRP) cellular activity with oxidative stress regulation in several tissue including brain tissue where FMRP participates to the response to stress via protein translation in neurite or is involved in free radical production and abnormal glutathione homeostasis. Based on these recent literatures, we raised the question about the effect of FMRP absence in the aging retina of Fmr1-/y compared to their WT littermates. Indeed, up to now, only young or adult mice (<6 months) were investigated and have shown a specific retinal phenotype. Herein, we demonstrated that Fmr1-/y mice do not present the aging effect on retinal function observed in WT littermates since ERG a- and b-waves amplitudes as well as oscillatory potentials amplitudes were not collapsed with age (12/18 months old). Absence of FMRP and its consequences seem to protect the retina against aging effect, rising a pivotal role of FMRP in retinal aging process.
Collapse
Affiliation(s)
- M Ardourel
- UMR7355, CNRS, Orléans, France; Experimental and Molecular Immunology and Neurogenetics, University of Orléans, 3b rue de la Ferollerie, 45071, Orléans, Cedex 2, France
| | - I Ranchon-Cole
- Université Clermont Auvergne, CHU Clermont-Ferrand, Inserm, Neuro-Dol, F-63000, Clermont-Ferrand, France
| | - A Pâris
- UMR7355, CNRS, Orléans, France; Experimental and Molecular Immunology and Neurogenetics, University of Orléans, 3b rue de la Ferollerie, 45071, Orléans, Cedex 2, France
| | - C Felgerolle
- UMR7355, CNRS, Orléans, France; Experimental and Molecular Immunology and Neurogenetics, University of Orléans, 3b rue de la Ferollerie, 45071, Orléans, Cedex 2, France
| | - N Acar
- Eye and Nutrition Research Group, Centre des Sciences du Goût et de l'Alimentation, CNRS, INRAE, Institut Agro, Université Bourgogne Franche-Comté, 21000, Dijon, France
| | - F Lesne
- Genetic Department, Regional Hospital, 14 Avenue de l'hôpital, 45100, Orléans, France
| | - S Briault
- UMR7355, CNRS, Orléans, France; Experimental and Molecular Immunology and Neurogenetics, University of Orléans, 3b rue de la Ferollerie, 45071, Orléans, Cedex 2, France; Genetic Department, Regional Hospital, 14 Avenue de l'hôpital, 45100, Orléans, France
| | - O Perche
- UMR7355, CNRS, Orléans, France; Experimental and Molecular Immunology and Neurogenetics, University of Orléans, 3b rue de la Ferollerie, 45071, Orléans, Cedex 2, France; Genetic Department, Regional Hospital, 14 Avenue de l'hôpital, 45100, Orléans, France.
| |
Collapse
|
4
|
Ardourel M, Pâris A, Felgerolle C, Lesne F, Ranchon-Cole I, Briault S, Perche O. FMRP-related retinal phenotypes: Evidence of glutamate-glutamine metabolic cycle impairment. Exp Eye Res 2022; 224:109238. [PMID: 36067823 DOI: 10.1016/j.exer.2022.109238] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 08/16/2022] [Accepted: 08/29/2022] [Indexed: 11/18/2022]
Abstract
FMRP, the fragile X mental retardation protein coded by the FMR1 gene, is an RNA-binding protein that assists transport, stabilization and translational regulation of specific synaptic mRNAs. Its expression has been found in multiple cell types of central nervous system (CNS) including glial cells where its involvement in glutamate neurotransmitter homeostasis have been shown. Indeed, glutamate homeostasis deficit has been observed in absence of FMRP in-vivo in cortex and hippocampus structures as well as in vitro on astroglial cell culture. Interestingly, the retina which is an extension of the CNS is presenting electrophysiological alterations in absence of FMRP in both human and murine models suggesting neurotransmitter impairments. Therefore, we investigate the consequences of Fmrp absence on Glutamate-Glutamine cycle in whole retinas and primary retinal Müller cells culture which are the main glial cells of the retina. Using the Fmr1-/y mice, we have shown in vivo and in vitro that the absence of Fmrp in Müller cells is characterized by loss of Glutamate-Glutamine cycle homeostasis due to a lower Glutamine Synthetase protein expression and activity. The lack of Fmrp in the retina induces a reduced flow of glutamine synthesis. Our data established for the first time in literature a direct link between the lack of Fmrp and neurotransmitter homeostasis in the retina.
Collapse
Affiliation(s)
- Maryvonne Ardourel
- UMR7355, CNRS, Orléans, France; Experimental and Molecular Immunology and Neurogenetics, University of Orléans, 3b rue de la Ferollerie, F-45071, Orléans Cedex 2, France
| | - Arnaud Pâris
- UMR7355, CNRS, Orléans, France; Experimental and Molecular Immunology and Neurogenetics, University of Orléans, 3b rue de la Ferollerie, F-45071, Orléans Cedex 2, France
| | - Chloé Felgerolle
- UMR7355, CNRS, Orléans, France; Experimental and Molecular Immunology and Neurogenetics, University of Orléans, 3b rue de la Ferollerie, F-45071, Orléans Cedex 2, France
| | - Fabien Lesne
- Genetic Department, Regional Hospital, 14 Avenue de l'hôpital, 45100, Orléans, France
| | - Isabelle Ranchon-Cole
- Université Clermont Auvergne, CHU Clermont-Ferrand, Inserm, Neuro-Dol, F-63000, Clermont-Ferrand, France
| | - Sylvain Briault
- Genetic Department, Regional Hospital, 14 Avenue de l'hôpital, 45100, Orléans, France; UMR7355, CNRS, Orléans, France; Experimental and Molecular Immunology and Neurogenetics, University of Orléans, 3b rue de la Ferollerie, F-45071, Orléans Cedex 2, France
| | - Olivier Perche
- Genetic Department, Regional Hospital, 14 Avenue de l'hôpital, 45100, Orléans, France; UMR7355, CNRS, Orléans, France; Experimental and Molecular Immunology and Neurogenetics, University of Orléans, 3b rue de la Ferollerie, F-45071, Orléans Cedex 2, France.
| |
Collapse
|
5
|
Liu Z, Wang Y, Ding Y, Wang H, Zhang J, Wang H. CXCL7 aggravates the pathological manifestations of neuromyelitis optica spectrum disorder by enhancing the inflammatory infiltration of neutrophils, macrophages and microglia. Clin Immunol 2022; 245:109139. [DOI: 10.1016/j.clim.2022.109139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 08/30/2022] [Accepted: 09/12/2022] [Indexed: 11/03/2022]
|