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Bataveljic D, Pivonkova H, de Concini V, Hébert B, Ezan P, Briault S, Bemelmans AP, Pichon J, Menuet A, Rouach N. Astroglial Kir4.1 potassium channel deficit drives neuronal hyperexcitability and behavioral defects in Fragile X syndrome mouse model. Nat Commun 2024; 15:3583. [PMID: 38678030 PMCID: PMC11055954 DOI: 10.1038/s41467-024-47681-y] [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] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2021] [Accepted: 04/03/2024] [Indexed: 04/29/2024] Open
Abstract
Fragile X syndrome (FXS) is an inherited form of intellectual disability caused by the loss of the mRNA-binding fragile X mental retardation protein (FMRP). FXS is characterized by neuronal hyperexcitability and behavioral defects, however the mechanisms underlying these critical dysfunctions remain unclear. Here, using male Fmr1 knockout mouse model of FXS, we identify abnormal extracellular potassium homeostasis, along with impaired potassium channel Kir4.1 expression and function in astrocytes. Further, we reveal that Kir4.1 mRNA is a binding target of FMRP. Finally, we show that the deficit in astroglial Kir4.1 underlies neuronal hyperexcitability and several behavioral defects in Fmr1 knockout mice. Viral delivery of Kir4.1 channels specifically to hippocampal astrocytes from Fmr1 knockout mice indeed rescues normal astrocyte potassium uptake, neuronal excitability, and cognitive and social performance. Our findings uncover an important role for astrocyte dysfunction in the pathophysiology of FXS, and identify Kir4.1 channel as a potential therapeutic target for FXS.
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Affiliation(s)
- Danijela Bataveljic
- Neuroglial Interactions in Cerebral Physiology and Pathologies, Center for Interdisciplinary Research in Biology, Collège de France, CNRS, INSERM, Labex Memolife, Université PSL, Paris, France
- Department of Biomedical Sciences, University of Antwerp, Antwerp, Belgium
| | - Helena Pivonkova
- Neuroglial Interactions in Cerebral Physiology and Pathologies, Center for Interdisciplinary Research in Biology, Collège de France, CNRS, INSERM, Labex Memolife, Université PSL, Paris, France
- Department of Physiology, 2nd Faculty of Medicine, Charles University, Prague, Czech Republic
| | - Vidian de Concini
- Experimental and Molecular Immunology and Neurogenetics, CNRS UMR7355 and Orléans University, Orléans, France
| | - Betty Hébert
- Experimental and Molecular Immunology and Neurogenetics, CNRS UMR7355 and Orléans University, Orléans, France
| | - Pascal Ezan
- Neuroglial Interactions in Cerebral Physiology and Pathologies, Center for Interdisciplinary Research in Biology, Collège de France, CNRS, INSERM, Labex Memolife, Université PSL, Paris, France
| | - Sylvain Briault
- Experimental and Molecular Immunology and Neurogenetics, CNRS UMR7355 and Orléans University, Orléans, France
- Department of Genetics, Regional Hospital, Orléans, France
| | - Alexis-Pierre Bemelmans
- Commissariat à l'Energie Atomique et aux Energies Alternatives (CEA), Département de la Recherche Fondamentale, Institut de biologie François Jacob, MIRCen, and CNRS UMR 9199, Université Paris-Sud, Neurodegenerative Diseases Laboratory, Fontenay-aux-Roses, 92260, France
| | - Jacques Pichon
- Experimental and Molecular Immunology and Neurogenetics, CNRS UMR7355 and Orléans University, Orléans, France
| | - Arnaud Menuet
- Experimental and Molecular Immunology and Neurogenetics, CNRS UMR7355 and Orléans University, Orléans, France
| | - Nathalie Rouach
- Neuroglial Interactions in Cerebral Physiology and Pathologies, Center for Interdisciplinary Research in Biology, Collège de France, CNRS, INSERM, Labex Memolife, Université PSL, Paris, France.
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Méresse S, Larrigaldie V, Oummadi A, de Concini V, Morisset-Lopez S, Reverchon F, Menuet A, Montécot-Dubourg C, Mortaud S. β-N-Methyl-Amino-L-Alanine cyanotoxin promotes modification of undifferentiated cells population and disrupts the inflammatory status in primary cultures of neural stem cells. Toxicology 2022; 482:153358. [DOI: 10.1016/j.tox.2022.153358] [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] [Received: 08/09/2022] [Revised: 10/06/2022] [Accepted: 10/24/2022] [Indexed: 11/07/2022]
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Reverchon F, de Concini V, Larrigaldie V, Benmerzoug S, Briault S, Togbé D, Ryffel B, Quesniaux VFJ, Menuet A. Hippocampal interleukin-33 mediates neuroinflammation-induced cognitive impairments. J Neuroinflammation 2020; 17:268. [PMID: 32917228 PMCID: PMC7488545 DOI: 10.1186/s12974-020-01939-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2020] [Accepted: 08/24/2020] [Indexed: 12/23/2022] Open
Abstract
Background Interleukin (IL)-33 is expressed in a healthy brain and plays a pivotal role in several neuropathologies, as protective or contributing to the development of cerebral diseases associated with cognitive impairments. However, the role of IL-33 in the brain is poorly understood, raising the question of its involvement in immunoregulatory mechanisms. Methods We administered recombinant IL-33 (rmIL-33) by intra-hippocampal injection to C57BL/6 J (WT) and IL-1αβ deficient mice. Chronic minocycline administration was performed and cognitive functions were examined trough spatial habituation test. Hippocampal inflammatory responses were investigated by RT-qPCR. The microglia activation was assessed using immunohistological staining and fluorescence-activated cell sorting (FACS). Results We showed that IL-33 administration in mice led to a spatial memory performance defect associated with an increase of inflammatory markers in the hippocampus while minocycline administration limited the inflammatory response. Quantitative assessment of glial cell activation in situ demonstrated an increase of proximal intersections per radius in each part of the hippocampus. Moreover, rmIL-33 significantly promoted the outgrowth of microglial processes. Fluorescence-activated cell sorting analysis on isolated microglia, revealed overexpression of IL-1β, 48 h post-rmIL-33 administration. This microglial reactivity was closely related to the onset of cognitive disturbance. Finally, we demonstrated that IL-1αβ deficient mice were resistant to cognitive disorders after intra-hippocampal IL-33 injection. Conclusion Thus, hippocampal IL-33 induced an inflammatory state, including IL-1β overexpression by microglia cells, being causative of the cognitive impairment. These results highlight the pathological role for IL-33 in the central nervous system, independently of a specific neuropathological model.
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Affiliation(s)
- Flora Reverchon
- UMR7355, Experimental and Molecular Immunology and Neurogenetics, CNRS and University of Orléans, 3B rue de la Ferollerie, 45071, Orléans, France.,Current address: Center for Molecular Biophysics, CNRS UPR4301, 45071, Orléans, France
| | - Vidian de Concini
- UMR7355, Experimental and Molecular Immunology and Neurogenetics, CNRS and University of Orléans, 3B rue de la Ferollerie, 45071, Orléans, France
| | - Vanessa Larrigaldie
- UMR7355, Experimental and Molecular Immunology and Neurogenetics, CNRS and University of Orléans, 3B rue de la Ferollerie, 45071, Orléans, France
| | - Sulayman Benmerzoug
- UMR7355, Experimental and Molecular Immunology and Neurogenetics, CNRS and University of Orléans, 3B rue de la Ferollerie, 45071, Orléans, France.,Current address:Department of Urology, Urology Research Unit, CHUV, Lausanne, Switzerland
| | - Sylvain Briault
- UMR7355, Experimental and Molecular Immunology and Neurogenetics, CNRS and University of Orléans, 3B rue de la Ferollerie, 45071, Orléans, France.,Department of Genetics, Regional Hospital, Orléans, France
| | | | - Bernhard Ryffel
- UMR7355, Experimental and Molecular Immunology and Neurogenetics, CNRS and University of Orléans, 3B rue de la Ferollerie, 45071, Orléans, France
| | - Valérie F J Quesniaux
- UMR7355, Experimental and Molecular Immunology and Neurogenetics, CNRS and University of Orléans, 3B rue de la Ferollerie, 45071, Orléans, France
| | - Arnaud Menuet
- UMR7355, Experimental and Molecular Immunology and Neurogenetics, CNRS and University of Orléans, 3B rue de la Ferollerie, 45071, Orléans, France.
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