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Jammes M, Cassé F, Velot E, Bianchi A, Audigié F, Contentin R, Galéra P. Pro-Inflammatory Cytokine Priming and Purification Method Modulate the Impact of Exosomes Derived from Equine Bone Marrow Mesenchymal Stromal Cells on Equine Articular Chondrocytes. Int J Mol Sci 2023; 24:14169. [PMID: 37762473 PMCID: PMC10531906 DOI: 10.3390/ijms241814169] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 09/12/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023] Open
Abstract
Osteoarthritis (OA) is a widespread osteoarticular pathology characterized by progressive hyaline cartilage degradation, exposing horses to impaired well-being, premature career termination, alongside substantial financial losses for horse owners. Among the new therapeutic strategies for OA, using mesenchymal stromal cell (MSC)-derived exosomes (MSC-exos) appears to be a promising option for conveying MSC therapeutic potential, yet avoiding the limitations inherent to cell therapy. Here, we first purified and characterized exosomes from MSCs by membrane affinity capture (MAC) and size-exclusion chromatography (SEC). We showed that intact MSC-exos are indeed internalized by equine articular chondrocytes (eACs), and then evaluated their functionality on cartilaginous organoids. Compared to SEC, mRNA and protein expression profiles revealed that MAC-exos induced a greater improvement of eAC-neosynthesized hyaline-like matrix by modulating collagen levels, increasing PCNA, and decreasing Htra1 synthesis. However, because the MAC elution buffer induced unexpected effects on eACs, an ultrafiltration step was included to the isolation protocol. Finally, exosomes from MSCs primed with equine pro-inflammatory cytokines (IL-1β, TNF-α, or IFN-γ) further improved the eAC hyaline-like phenotype, particularly IL-1β and TNF-α. Altogether, these findings indicate the importance of the exosome purification method and further demonstrate the potential of pro-inflammatory priming in the enhancement of the therapeutic value of MSC-exos for equine OA treatment.
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Affiliation(s)
- Manon Jammes
- BIOTARGEN, UNICAEN, Normandie University, 14000 Caen, France; (M.J.); (F.C.); (R.C.)
| | - Frédéric Cassé
- BIOTARGEN, UNICAEN, Normandie University, 14000 Caen, France; (M.J.); (F.C.); (R.C.)
| | - Emilie Velot
- Molecular Engineering and Articular Physiopathology (IMoPA), French National Center for Scientific Research (CNRS), Université de Lorraine, 54000 Nancy, France; (E.V.); (A.B.)
| | - Arnaud Bianchi
- Molecular Engineering and Articular Physiopathology (IMoPA), French National Center for Scientific Research (CNRS), Université de Lorraine, 54000 Nancy, France; (E.V.); (A.B.)
| | - Fabrice Audigié
- Center of Imaging and Research in Locomotor Affections on Equines, Veterinary School of Alfort, 14430 Goustranville, France;
| | - Romain Contentin
- BIOTARGEN, UNICAEN, Normandie University, 14000 Caen, France; (M.J.); (F.C.); (R.C.)
| | - Philippe Galéra
- BIOTARGEN, UNICAEN, Normandie University, 14000 Caen, France; (M.J.); (F.C.); (R.C.)
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Jammes M, Contentin R, Audigié F, Cassé F, Galéra P. Effect of pro-inflammatory cytokine priming and storage temperature of the mesenchymal stromal cell (MSC) secretome on equine articular chondrocytes. Front Bioeng Biotechnol 2023; 11:1204737. [PMID: 37720315 PMCID: PMC10502223 DOI: 10.3389/fbioe.2023.1204737] [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: 04/12/2023] [Accepted: 08/21/2023] [Indexed: 09/19/2023] Open
Abstract
Context: Osteoarthritis (OA) is an invalidating articular disease characterized by cartilage degradation and inflammatory events. In horses, OA is associated with up to 60% of lameness and leads to reduced animal welfare along with extensive economic losses; currently, there are no curative therapies to treat OA. The mesenchymal stromal cell (MSC) secretome exhibits anti-inflammatory properties, making it an attractive candidate for improving the management of OA. In this study, we determined the best storage conditions for conditioned media (CMs) and tested whether priming MSCs with cytokines can enhance the properties of the MSC secretome. Methods: First, properties of CMs collected from bone-marrow MSC cultures and stored at -80°C, -20°C, 4°C, 20°C or 37°C were assessed on 3D cultures of equine articular chondrocytes (eACs). Second, we primed MSCs with IL-1β, TNF-α or IFN-γ, and evaluated the MSC transcript levels of immunomodulatory effectors and growth factors. The primed CMs were also harvested for subsequent treatment of eACs, either cultured in monolayers or as 3D cell cultures. Finally, we evaluated the effect of CMs on the proliferation and the phenotype of eACs and the quality of the extracellular matrix of the neosynthesized cartilage. Results: CM storage at -80°C, -20°C, and 4°C improved collagen protein accumulation, cell proliferation and the downregulation of inflammation. The three cytokines chosen for the MSC priming influenced MSC immunomodulator gene expression, although each cytokine led to a different pattern of MSC immunomodulation. The cytokine-primed CM had no major effect on eAC proliferation, with IL-1β and TNF-α slightly increasing collagen (types IIB and I) accumulation in eAC 3D cultures (particularly with the CM derived from MSCs primed with IL-1β), and IFN-γ leading to a marked decrease. IL-1β-primed CMs resulted in increased eAC transcript levels of MMP1, MMP13 and HTRA1, whereas IFNγ-primed CMs decreased the levels of HTRA1 and MMP13. Conclusion: Although the three cytokines differentially affected the expression of immunomodulatory molecules, primed CMs induced a distinct effect on eACs according to the cytokine used for MSC priming. Different mechanisms seemed to be triggered by each priming cytokine, highlighting the need for further investigation. Nevertheless, this study demonstrates the potential of MSC-CMs for improving equine OA management.
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Affiliation(s)
- Manon Jammes
- Normandie University, UNICAEN, BIOTARGEN, Caen, France
| | | | - Fabrice Audigié
- Unit Under Contract 957 Equine Biomechanics and Locomotor Disorders (USC 957 BPLC), Center of Imaging and Research on Locomotor Affections on Equines (CIRALE), French National Research Institute for Agriculture Food and Environment (INRAE), École Nationale Vétérinaire d’Alfort, Maisons-Alfort, France
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Jammes M, Contentin R, Cassé F, Galéra P. Equine osteoarthritis: Strategies to enhance mesenchymal stromal cell-based acellular therapies. Front Vet Sci 2023; 10:1115774. [PMID: 36846261 PMCID: PMC9950114 DOI: 10.3389/fvets.2023.1115774] [Citation(s) in RCA: 4] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Accepted: 01/26/2023] [Indexed: 02/12/2023] Open
Abstract
Osteoarthritis (OA) is a degenerative disease that eventually leads to the complete degradation of articular cartilage. Articular cartilage has limited intrinsic capacity for self-repair and, to date, there is no curative treatment for OA. Humans and horses have a similar articular cartilage and OA etiology. Thus, in the context of a One Health approach, progress in the treatment of equine OA can help improve horse health and can also constitute preclinical studies for human medicine. Furthermore, equine OA affects horse welfare and leads to significant financial losses in the equine industry. In the last few years, the immunomodulatory and cartilage regenerative potentials of mesenchymal stromal cells (MSCs) have been demonstrated, but have also raised several concerns. However, most of MSC therapeutic properties are contained in their secretome, particularly in their extracellular vesicles (EVs), a promising avenue for acellular therapy. From tissue origin to in vitro culture methods, various aspects must be taken into consideration to optimize MSC secretome potential for OA treatment. Immunomodulatory and regenerative properties of MSCs can also be enhanced by recreating a pro-inflammatory environment to mimic an in vivo pathological setting, but more unusual methods also deserve to be investigated. Altogether, these strategies hold substantial potential for the development of MSC secretome-based therapies suitable for OA management. The aim of this mini review is to survey the most recent advances on MSC secretome research with regard to equine OA.
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Affiliation(s)
- Manon Jammes
- BIOTARGEN, UNICAEN, Normandie University, Caen, France
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Contentin R, Jammes M, Bourdon B, Cassé F, Bianchi A, Audigié F, Branly T, Velot É, Galéra P. Bone Marrow MSC Secretome Increases Equine Articular Chondrocyte Collagen Accumulation and Their Migratory Capacities. Int J Mol Sci 2022; 23:5795. [PMID: 35628604 PMCID: PMC9146805 DOI: 10.3390/ijms23105795] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Revised: 05/17/2022] [Accepted: 05/19/2022] [Indexed: 02/01/2023] Open
Abstract
Equine osteoarthritis (OA) leads to cartilage degradation with impaired animal well-being, premature cessation of sport activity, and financial losses. Mesenchymal stem cell (MSC)-based therapies are promising for cartilage repair, but face limitations inherent to the cell itself. Soluble mediators and extracellular vesicles (EVs) secreted by MSCs are the alternatives to overcome those limitations while preserving MSC restorative properties. The effect of equine bone marrow MSC secretome on equine articular chondrocytes (eACs) was analyzed with indirect co-culture and/or MSC-conditioned media (CM). The expression of healthy cartilage/OA and proliferation markers was evaluated in eACs (monolayers or organoids). In vitro repair experiments with MSC-CM were made to evaluate the proliferation and migration of eACs. The presence of nanosized EVs in MSC-CM was appraised with nanoparticle tracking assay and transmission electron microscopy. Our results demonstrated that the MSC secretome influences eAC phenotype by increasing cartilage functionality markers and cell migration in a greater way than MSCs, which could delay OA final outcomes. This study makes acellular therapy an appealing strategy to improve equine OA treatments. However, the MSC secretome contains a wide variety of soluble mediators and small EVs, such as exosomes, and further investigation must be performed to understand the mechanisms occurring behind these promising effects.
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Affiliation(s)
- Romain Contentin
- Normandie University, Unicaen, Biotargen, F-14000 Caen, France; (R.C.); (M.J.); (B.B.); (F.C.); (T.B.)
| | - Manon Jammes
- Normandie University, Unicaen, Biotargen, F-14000 Caen, France; (R.C.); (M.J.); (B.B.); (F.C.); (T.B.)
| | - Bastien Bourdon
- Normandie University, Unicaen, Biotargen, F-14000 Caen, France; (R.C.); (M.J.); (B.B.); (F.C.); (T.B.)
| | - Frédéric Cassé
- Normandie University, Unicaen, Biotargen, F-14000 Caen, France; (R.C.); (M.J.); (B.B.); (F.C.); (T.B.)
| | - Arnaud Bianchi
- Molecular Engineering and Articular Physiopathology (IMoPA), French National Center for Scientific Research (CNRS), Université de Lorraine, F-54000 Nancy, France; (A.B.); (É.V.)
| | - Fabrice Audigié
- Center of Imaging and Research on Locomotor Affections on Equines (CIRALE), Unit Under Contract 957 Equine Biomechanics and Locomotor Disorders (USC 957 BPLC), French National Research Institute for Agriculture Food and Environment (INRAE), École Nationale Vétérinaire d’Alfort, F-94700 Maisons-Alfort, France;
| | - Thomas Branly
- Normandie University, Unicaen, Biotargen, F-14000 Caen, France; (R.C.); (M.J.); (B.B.); (F.C.); (T.B.)
| | - Émilie Velot
- Molecular Engineering and Articular Physiopathology (IMoPA), French National Center for Scientific Research (CNRS), Université de Lorraine, F-54000 Nancy, France; (A.B.); (É.V.)
| | - Philippe Galéra
- Normandie University, Unicaen, Biotargen, F-14000 Caen, France; (R.C.); (M.J.); (B.B.); (F.C.); (T.B.)
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Bourdon B, Contentin R, Cassé F, Maspimby C, Oddoux S, Noël A, Legendre F, Gruchy N, Galéra P. Marine Collagen Hydrolysates Downregulate the Synthesis of Pro-Catabolic and Pro-Inflammatory Markers of Osteoarthritis and Favor Collagen Production and Metabolic Activity in Equine Articular Chondrocyte Organoids. Int J Mol Sci 2021; 22:ijms22020580. [PMID: 33430111 PMCID: PMC7826754 DOI: 10.3390/ijms22020580] [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] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 12/22/2020] [Accepted: 12/31/2020] [Indexed: 01/07/2023] Open
Abstract
Articular cartilage experiences mechanical constraints leading to chondral defects that inevitably evolve into osteoarthritis (OA), because cartilage has poor intrinsic repair capacity. Although OA is an incurable degenerative disease, several dietary supplements may help improve OA outcomes. In this study, we investigated the effects of Dielen® hydrolyzed fish collagens from skin (Promerim®30 and Promerim®60) and cartilage (Promerim®40) to analyze the phenotype and metabolism of equine articular chondrocytes (eACs) cultured as organoids. Here, our findings demonstrated the absence of cytotoxicity and the beneficial effect of Promerim® hydrolysates on eAC metabolic activity under physioxia; further, Promerim®30 also delayed eAC senescence. To assess the effect of Promerim® in a cartilage-like tissue, eACs were cultured as organoids under hypoxia with or without BMP-2 and/or IL-1β. In some instances, alone or in the presence of IL-1β, Promerim®30 and Promerim®40 increased protein synthesis of collagen types I and II, while decreasing transcript levels of proteases involved in OA pathogenesis, namely Htra1, and the metalloproteinases Mmp1-3, Adamts5, and Cox2. Both Promerim® hydrolysates also decreased Htra1 protein amounts, particularly in inflammatory conditions. The effect of Promerim® was enhanced under inflammatory conditions, possibly due to a decrease in the synthesis of inflammation-associated molecules. Finally, Promerim® favored in vitro repair in a scratch wound assay through an increase in cell proliferation or migration. Altogether, these data show that Promerim®30 and 40 hold promise as dietary supplements to relieve OA symptoms in patients and to delay OA progression.
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Affiliation(s)
- Bastien Bourdon
- Normandie University, UNICAEN, BIOTARGEN, 14000 Caen, France; (B.B.); (R.C.); (F.C.); (C.M.); (F.L.); (N.G.)
- Dielen Laboratory, 50110 Tourlaville, France; (S.O.); (A.N.)
| | - Romain Contentin
- Normandie University, UNICAEN, BIOTARGEN, 14000 Caen, France; (B.B.); (R.C.); (F.C.); (C.M.); (F.L.); (N.G.)
| | - Frédéric Cassé
- Normandie University, UNICAEN, BIOTARGEN, 14000 Caen, France; (B.B.); (R.C.); (F.C.); (C.M.); (F.L.); (N.G.)
| | - Chloé Maspimby
- Normandie University, UNICAEN, BIOTARGEN, 14000 Caen, France; (B.B.); (R.C.); (F.C.); (C.M.); (F.L.); (N.G.)
| | - Sarah Oddoux
- Dielen Laboratory, 50110 Tourlaville, France; (S.O.); (A.N.)
| | - Antoine Noël
- Dielen Laboratory, 50110 Tourlaville, France; (S.O.); (A.N.)
| | - Florence Legendre
- Normandie University, UNICAEN, BIOTARGEN, 14000 Caen, France; (B.B.); (R.C.); (F.C.); (C.M.); (F.L.); (N.G.)
| | - Nicolas Gruchy
- Normandie University, UNICAEN, BIOTARGEN, 14000 Caen, France; (B.B.); (R.C.); (F.C.); (C.M.); (F.L.); (N.G.)
- Department of Genetics, Normandy Center for Genomic and Personalized Medicine, Caen University Hospital, 14000 Caen, France
| | - Philippe Galéra
- Normandie University, UNICAEN, BIOTARGEN, 14000 Caen, France; (B.B.); (R.C.); (F.C.); (C.M.); (F.L.); (N.G.)
- Correspondence:
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Schorova L, Pronot M, Poupon G, Prieto M, Folci A, Khayachi A, Brau F, Cassé F, Gwizdek C, Martin S. The synaptic balance between sumoylation and desumoylation is maintained by the activation of metabotropic mGlu5 receptors. Cell Mol Life Sci 2019; 76:3019-3031. [PMID: 30904951 DOI: 10.1007/s00018-019-03075-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Revised: 03/01/2019] [Accepted: 03/18/2019] [Indexed: 12/23/2022]
Abstract
Sumoylation is a reversible post-translational modification essential to the modulation of neuronal function, including neurotransmitter release and synaptic plasticity. A tightly regulated equilibrium between the sumoylation and desumoylation processes is critical to the brain function and its disruption has been associated with several neurological disorders. This sumoylation/desumoylation balance is governed by the activity of the sole SUMO-conjugating enzyme Ubc9 and a group of desumoylases called SENPs, respectively. We previously demonstrated that the activation of type 5 metabotropic glutamate receptors (mGlu5R) triggers the transient trapping of Ubc9 in dendritic spines, leading to a rapid increase in the overall synaptic sumoylation. However, the mechanisms balancing this increased synaptic sumoylation are still not known. Here, we examined the diffusion properties of the SENP1 enzyme using a combination of advanced biochemical approaches and restricted photobleaching/photoconversion of individual hippocampal spines. We demonstrated that the activation of mGlu5R leads to a time-dependent decrease in the exit rate of SENP1 from dendritic spines. The resulting post-synaptic accumulation of SENP1 restores synaptic sumoylation to initial levels. Altogether, our findings reveal the mGlu5R system as a central activity-dependent mechanism to maintaining the homeostasis of sumoylation at the mammalian synapse.
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Affiliation(s)
- Lenka Schorova
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660 route des lucioles, 06560, Valbonne, France
| | - Marie Pronot
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660 route des lucioles, 06560, Valbonne, France
| | - Gwénola Poupon
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660 route des lucioles, 06560, Valbonne, France
| | - Marta Prieto
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660 route des lucioles, 06560, Valbonne, France
| | - Alessandra Folci
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660 route des lucioles, 06560, Valbonne, France
| | - Anouar Khayachi
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660 route des lucioles, 06560, Valbonne, France
| | - Frédéric Brau
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660 route des lucioles, 06560, Valbonne, France
| | - Frédéric Cassé
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660 route des lucioles, 06560, Valbonne, France
| | - Carole Gwizdek
- Université Côte d'Azur, Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660 route des lucioles, 06560, Valbonne, France
| | - Stéphane Martin
- Université Côte d'Azur, Institut National de la Santé et de la Recherche Médicale, Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, UMR7275, 660 route des lucioles, 06560, Valbonne, France.
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Cassé F, Richetin K, Toni N. Astrocytes' Contribution to Adult Neurogenesis in Physiology and Alzheimer's Disease. Front Cell Neurosci 2018; 12:432. [PMID: 30538622 PMCID: PMC6277517 DOI: 10.3389/fncel.2018.00432] [Citation(s) in RCA: 67] [Impact Index Per Article: 11.2] [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: 06/12/2018] [Accepted: 10/31/2018] [Indexed: 12/22/2022] Open
Abstract
Adult neurogenesis is one of the most drastic forms of brain plasticity in adulthood and there is a growing body of evidence showing that, in the hippocampus, this process contributes to mechanisms of memory as well as depression. Interestingly, adult neurogenesis is tightly regulated by the neurogenic niche, which provides a structural and molecular scaffold for stem cell proliferation and the differentiation and functional integration of new neurons. In this review, we highlight the role of astrocytes in the regulation of adult neurogenesis in the context of cognitive function. We also discuss how the changes in astrocytes function may dysregulate adult neurogenesis and contribute to cognitive impairment in the context of Alzheimer's disease.
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Affiliation(s)
- Frédéric Cassé
- Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital, Lausanne, Switzerland
| | - Kevin Richetin
- Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital, Lausanne, Switzerland
| | - Nicolas Toni
- Center for Psychiatric Neuroscience, Department of Psychiatry, Lausanne University Hospital, Lausanne, Switzerland
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Krzisch M, Fülling C, Jabinet L, Armida J, Gebara E, Cassé F, Habbas S, Volterra A, Hornung JP, Toni N. Synaptic Adhesion Molecules Regulate the Integration of New Granule Neurons in the Postnatal Mouse Hippocampus and their Impact on Spatial Memory. Cereb Cortex 2018; 27:4048-4059. [PMID: 27473321 DOI: 10.1093/cercor/bhw217] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [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: 06/23/2016] [Accepted: 06/21/2016] [Indexed: 11/14/2022] Open
Abstract
Postnatal hippocampal neurogenesis induces network remodeling and may participate to mechanisms of learning. In turn, the maturation and survival of newborn neurons is regulated by their activity. Here, we tested the effect of a cell-autonomous overexpression of synaptic adhesion molecules on the maturation and survival of neurons born postnatally and on hippocampal-dependent memory performances. Families of adhesion molecules are known to induce pre- and post-synaptic assembly. Using viral targeting, we overexpressed three different synaptic adhesion molecules, SynCAM1, Neuroligin-1B and Neuroligin-2A in newborn neurons in the dentate gyrus of 7- to 9-week-old mice. We found that SynCAM1 increased the morphological maturation of dendritic spines and mossy fiber terminals while Neuroligin-1B increased spine density. In contrast, Neuroligin-2A increased both spine density and size as well as GABAergic innervation and resulted in a drastic increase of neuronal survival. Surprisingly, despite increased neurogenesis, mice overexpressing Neuroligin-2A in new neurons showed decreased memory performances in a Morris water maze task. These results indicate that the cell-autonomous overexpression of synaptic adhesion molecules can enhance different aspects of synapse formation on new neurons and increase their survival. Furthermore, they suggest that the mechanisms by which new neurons integrate in the postnatal hippocampus conditions their functional implication in learning and memory.
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Affiliation(s)
- Marine Krzisch
- Department of Fundamental Neurosciences, University of Lausanne, 9, rue du Bugnon, Lausanne, Switzerland
| | - Christine Fülling
- Department of Fundamental Neurosciences, University of Lausanne, 9, rue du Bugnon, Lausanne, Switzerland
| | - Laura Jabinet
- Department of Fundamental Neurosciences, University of Lausanne, 9, rue du Bugnon, Lausanne, Switzerland
| | - Jan Armida
- Department of Fundamental Neurosciences, University of Lausanne, 9, rue du Bugnon, Lausanne, Switzerland
| | - Elias Gebara
- Department of Fundamental Neurosciences, University of Lausanne, 9, rue du Bugnon, Lausanne, Switzerland
| | - Frédéric Cassé
- Department of Fundamental Neurosciences, University of Lausanne, 9, rue du Bugnon, Lausanne, Switzerland
| | - Samia Habbas
- Department of Fundamental Neurosciences, University of Lausanne, 9, rue du Bugnon, Lausanne, Switzerland
| | - Andrea Volterra
- Department of Fundamental Neurosciences, University of Lausanne, 9, rue du Bugnon, Lausanne, Switzerland
| | - Jean-Pierre Hornung
- Department of Fundamental Neurosciences, University of Lausanne, 9, rue du Bugnon, Lausanne, Switzerland
| | - Nicolas Toni
- Department of Fundamental Neurosciences, University of Lausanne, 9, rue du Bugnon, Lausanne, Switzerland
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Khayachi A, Gwizdek C, Poupon G, Alcor D, Chafai M, Cassé F, Maurin T, Prieto M, Folci A, De Graeve F, Castagnola S, Gautier R, Schorova L, Loriol C, Pronot M, Besse F, Brau F, Deval E, Bardoni B, Martin S. Sumoylation regulates FMRP-mediated dendritic spine elimination and maturation. Nat Commun 2018; 9:757. [PMID: 29472612 PMCID: PMC5823917 DOI: 10.1038/s41467-018-03222-y] [Citation(s) in RCA: 48] [Impact Index Per Article: 8.0] [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] [Received: 07/25/2017] [Accepted: 01/28/2018] [Indexed: 12/02/2022] Open
Abstract
Fragile X syndrome (FXS) is the most frequent inherited cause of intellectual disability and the best-studied monogenic cause of autism. FXS results from the functional absence of the fragile X mental retardation protein (FMRP) leading to abnormal pruning and consequently to synaptic communication defects. Here we show that FMRP is a substrate of the small ubiquitin-like modifier (SUMO) pathway in the brain and identify its active SUMO sites. We unravel the functional consequences of FMRP sumoylation in neurons by combining molecular replacement strategy, biochemical reconstitution assays with advanced live-cell imaging. We first demonstrate that FMRP sumoylation is promoted by activation of metabotropic glutamate receptors. We then show that this increase in sumoylation controls the homomerization of FMRP within dendritic mRNA granules which, in turn, regulates spine elimination and maturation. Altogether, our findings reveal the sumoylation of FMRP as a critical activity-dependent regulatory mechanism of FMRP-mediated neuronal function. Fragile X syndrome patients display intellectual disability and autism, caused by mutations in the RNA-binding protein fragile X mental retardation protein (FMRP). Here, the authors show that FMRP sumoylation is required for regulating spine density and maturation.
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Affiliation(s)
| | - Carole Gwizdek
- Université Côte d'Azur, CNRS, IPMC, 06560, Valbonne, France
| | - Gwénola Poupon
- Université Côte d'Azur, CNRS, IPMC, 06560, Valbonne, France
| | - Damien Alcor
- Université Côte d'Azur, INSERM, C3M, 06200, Nice, France
| | - Magda Chafai
- Université Côte d'Azur, CNRS, IPMC, 06560, Valbonne, France
| | - Frédéric Cassé
- Université Côte d'Azur, CNRS, IPMC, 06560, Valbonne, France
| | - Thomas Maurin
- Université Côte d'Azur, CNRS, IPMC, 06560, Valbonne, France
| | - Marta Prieto
- Université Côte d'Azur, CNRS, IPMC, 06560, Valbonne, France
| | | | | | | | - Romain Gautier
- Université Côte d'Azur, CNRS, IPMC, 06560, Valbonne, France
| | - Lenka Schorova
- Université Côte d'Azur, CNRS, IPMC, 06560, Valbonne, France
| | - Céline Loriol
- Université Côte d'Azur, CNRS, IPMC, 06560, Valbonne, France
| | - Marie Pronot
- Université Côte d'Azur, CNRS, IPMC, 06560, Valbonne, France
| | - Florence Besse
- Université Côte d'Azur, CNRS, INSERM, iBV, 06108, Nice, France
| | - Frédéric Brau
- Université Côte d'Azur, CNRS, IPMC, 06560, Valbonne, France
| | - Emmanuel Deval
- Université Côte d'Azur, CNRS, IPMC, 06560, Valbonne, France
| | - Barbara Bardoni
- Université Côte d'Azur, INSERM, CNRS, IPMC, 06560, Valbonne, France
| | - Stéphane Martin
- Université Côte d'Azur, INSERM, CNRS, IPMC, 06560, Valbonne, France.
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10
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Xiong H, Cassé F, Zhou M, Xiong ZQ, Joels M, Martin S, Krugers HJ. Interactions between N-Ethylmaleimide-sensitive factor and GluA2 contribute to effects of glucocorticoid hormones on AMPA receptor function in the rodent hippocampus. Hippocampus 2016; 26:848-56. [PMID: 26766634 DOI: 10.1002/hipo.22567] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [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: 11/10/2015] [Revised: 01/07/2016] [Accepted: 01/07/2016] [Indexed: 01/12/2023]
Abstract
Glucocorticoid hormones, via activation of their receptors, promote memory consolidation, but the exact underlying mechanisms remain elusive. We examined how corticosterone regulates AMPA receptor (AMPAR) availability in the synapse, which is important for synaptic plasticity and memory formation. Peptides which specifically block the interaction between N-Ethylmaleimide-Sensitive Factor (NSF) and the AMPAR-subunit GluA2 prevented the increase in synaptic transmission and surface expression of AMPARs known to occur after corticosterone application to hippocampal neurons. Combining a live imaging Fluorescence Recovery After Photobleaching (FRAP) approach with the use of the pH-sensitive GFP-AMPAR tagging revealed that this NSF/GluA2 interaction was also essential for the increase of the mobile fraction and reduction of the diffusion of AMPARs after treating hippocampal neurons with corticosterone. We conclude that the interaction between NSF and GluA2 contributes to the effects of corticosterone on AMPAR function. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Hui Xiong
- SILS-CNS, University of Amsterdam, Science Park 904, Amsterdam, 1098 XH, the Netherlands
| | - Frédéric Cassé
- Centre National De La Recherche Scientifique, University of Nice - Sophia-Antipolis Institut De Pharmacologie Moléculaire Et Cellulaire, UMR7275, Valbonne, 06560, France
| | - Ming Zhou
- Institute of Neuroscience, Chinese Academy of Sciences, 320 Yue Yang Road, Shanghai, 20031, China
| | - Zhi-Qi Xiong
- SILS-CNS, University of Amsterdam, Science Park 904, Amsterdam, 1098 XH, the Netherlands
| | - Marian Joels
- SILS-CNS, University of Amsterdam, Science Park 904, Amsterdam, 1098 XH, the Netherlands
| | - Stéphane Martin
- Centre National De La Recherche Scientifique, University of Nice - Sophia-Antipolis Institut De Pharmacologie Moléculaire Et Cellulaire, UMR7275, Valbonne, 06560, France
| | - Harm J Krugers
- SILS-CNS, University of Amsterdam, Science Park 904, Amsterdam, 1098 XH, the Netherlands
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11
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Sultan S, Li L, Moss J, Petrelli F, Cassé F, Gebara E, Lopatar J, Pfrieger FW, Bezzi P, Bischofberger J, Toni N. Synaptic Integration of Adult-Born Hippocampal Neurons Is Locally Controlled by Astrocytes. Neuron 2015; 88:957-972. [PMID: 26606999 DOI: 10.1016/j.neuron.2015.10.037] [Citation(s) in RCA: 184] [Impact Index Per Article: 20.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Revised: 09/23/2015] [Accepted: 10/13/2015] [Indexed: 01/20/2023]
Abstract
Adult neurogenesis is regulated by the neurogenic niche, through mechanisms that remain poorly defined. Here, we investigated whether niche-constituting astrocytes influence the maturation of adult-born hippocampal neurons using two independent transgenic approaches to block vesicular release from astrocytes. In these models, adult-born neurons but not mature neurons showed reduced glutamatergic synaptic input and dendritic spine density that was accompanied with lower functional integration and cell survival. By taking advantage of the mosaic expression of transgenes in astrocytes, we found that spine density was reduced exclusively in segments intersecting blocked astrocytes, revealing an extrinsic, local control of spine formation. Defects in NMDA receptor (NMDAR)-mediated synaptic transmission and dendrite maturation were partially restored by exogenous D-serine, whose extracellular level was decreased in transgenic models. Together, these results reveal a critical role for adult astrocytes in local dendritic spine maturation, which is necessary for the NMDAR-dependent functional integration of newborn neurons.
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Affiliation(s)
- Sébastien Sultan
- University of Lausanne, Department of Fundamental Neurosciences, 9 rue du Bugnon, 1005 Lausanne, Switzerland
| | - Liyi Li
- Department of Biomedicine, Physiological Institute, University of Basel, Pestalozzistrasse 20, 4056 Basel, Switzerland
| | - Jonathan Moss
- University of Lausanne, Department of Fundamental Neurosciences, 9 rue du Bugnon, 1005 Lausanne, Switzerland
| | - Francesco Petrelli
- University of Lausanne, Department of Fundamental Neurosciences, 9 rue du Bugnon, 1005 Lausanne, Switzerland
| | - Frédéric Cassé
- University of Lausanne, Department of Fundamental Neurosciences, 9 rue du Bugnon, 1005 Lausanne, Switzerland
| | - Elias Gebara
- University of Lausanne, Department of Fundamental Neurosciences, 9 rue du Bugnon, 1005 Lausanne, Switzerland
| | - Jan Lopatar
- University of Lausanne, Department of Fundamental Neurosciences, 9 rue du Bugnon, 1005 Lausanne, Switzerland
| | - Frank W Pfrieger
- CNRS UPR 3212, University of Strasbourg, Institute of Cellular and Integrative Neurosciences, 67084 Strasbourg, France
| | - Paola Bezzi
- University of Lausanne, Department of Fundamental Neurosciences, 9 rue du Bugnon, 1005 Lausanne, Switzerland
| | - Josef Bischofberger
- Department of Biomedicine, Physiological Institute, University of Basel, Pestalozzistrasse 20, 4056 Basel, Switzerland
| | - Nicolas Toni
- University of Lausanne, Department of Fundamental Neurosciences, 9 rue du Bugnon, 1005 Lausanne, Switzerland.
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12
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Xiong H, Cassé F, Zhou Y, Zhou M, Xiong ZQ, Joëls M, Martin S, Krugers HJ. mTOR is essential for corticosteroid effects on hippocampal AMPA receptor function and fear memory. Learn Mem 2015; 22:577-83. [PMID: 26572647 PMCID: PMC4749735 DOI: 10.1101/lm.039420.115] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [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] [Received: 06/21/2015] [Accepted: 09/04/2015] [Indexed: 02/06/2023]
Abstract
Glucocorticoid hormones, via activation of their receptors, promote memory consolidation, but the exact underlying mechanisms remain elusive. We examined how corticosterone regulates AMPA receptors (AMPARs), which are crucial for synaptic plasticity and memory formation. Combining a live imaging fluorescent recovery after photobleaching approach with the use of the pH-sensitive GFP-AMPAR tagging revealed that corticosterone enhances the AMPAR mobile fraction and increases synaptic trapping of AMPARs in hippocampal cells. In parallel, corticosterone-enhanced AMPAR-mediated synaptic transmission. Blocking the mammalian target of rapamycin (mTOR) pathway prevented the effects of corticosterone on both AMPAR trapping—but not on the mobile fraction—and synaptic transmission. Blocking the mTOR pathway also prevented the memory enhancing effects of corticosterone in a contextual fear-conditioning paradigm. We conclude that activation of the mTOR pathway is essential for the effects of corticosterone on synaptic trapping of AMPARs and, possibly as a consequence, fearful memory formation.
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Affiliation(s)
- Hui Xiong
- Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam 1098 XH, The Netherlands
| | - Frédéric Cassé
- Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, UMR-7275, University of Nice, Sophia Antipolis, Valbonne 06560, France
| | - Yang Zhou
- Institute of Neuroscience, State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Ming Zhou
- Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam 1098 XH, The Netherlands
| | - Zhi-Qi Xiong
- Institute of Neuroscience, State Key Laboratory of Neuroscience, CAS Center for Excellence in Brain Science, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Shanghai 200031, China
| | - Marian Joëls
- Department of Neuroscience and Pharmacology, Brain Center Rudolf Magnus, University Medical Center Utrecht, Utrecht 3508 AB, The Netherlands
| | - Stéphane Martin
- Centre National de la Recherche Scientifique, Institut de Pharmacologie Moléculaire et Cellulaire, UMR-7275, University of Nice, Sophia Antipolis, Valbonne 06560, France
| | - Harm J Krugers
- Swammerdam Institute for Life Sciences, University of Amsterdam, Amsterdam 1098 XH, The Netherlands
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13
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Cassé F, Martin S. Tracking the activity-dependent diffusion of synaptic proteins using restricted photoconversion of Dendra2. Front Cell Neurosci 2015; 9:367. [PMID: 26441538 PMCID: PMC4585026 DOI: 10.3389/fncel.2015.00367] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [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: 07/07/2015] [Accepted: 09/04/2015] [Indexed: 12/23/2022] Open
Abstract
Spines are small protrusions on dendritic membranes receiving inputs from axonal termini. They consist in a head connected to the dendritic shaft by a narrow neck and contain multiple synaptic proteins that interact in a coordinated manner to allow for synaptic communication. This process involves many proteins that are moving in and out spines. However, comparing this synaptodendritic movement in basal and stimulated conditions is very challenging. Here we describe an elegant method to measure the activity-dependent diffusion of synaptic proteins using Dendra2 photoconversion. We provide a successful method to obtain Dendra2-photoconverted images and a step-by-step procedure to analyze the data. This live-imaging approach may also apply to investigate the diffusion of proteins across other subcellular compartments or organelles including but not restricted to, nucleus, nucleolus, ER, or vesicular structures. Once the imaging system is set up, data can be acquired in 1-30 min and analyzed in approximately 1-4 h.
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Affiliation(s)
- Frédéric Cassé
- Centre National de la Recherche Scientifique UMR7275 - Laboratory of Excellence "Network for Innovation on Signal Transduction, Pathways in Life Sciences, " Institut de Pharmacologie Moléculaire et Cellulaire, University of Nice - Sophia Antipolis Valbonne, France
| | - Stéphane Martin
- Centre National de la Recherche Scientifique UMR7275 - Laboratory of Excellence "Network for Innovation on Signal Transduction, Pathways in Life Sciences, " Institut de Pharmacologie Moléculaire et Cellulaire, University of Nice - Sophia Antipolis Valbonne, France
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14
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Gwizdek C, Cassé F, Martin S. Protein sumoylation in brain development, neuronal morphology and spinogenesis. Neuromolecular Med 2013; 15:677-91. [PMID: 23907729 DOI: 10.1007/s12017-013-8252-z] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [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: 05/29/2013] [Accepted: 07/22/2013] [Indexed: 01/11/2023]
Abstract
Small ubiquitin-like modifiers (SUMOs) are polypeptides resembling ubiquitin that are covalently attached to specific lysine residue of target proteins through a specific enzymatic pathway. Sumoylation is now seen as a key posttranslational modification involved in many biological processes, but little is known about how this highly dynamic protein modification is regulated in the brain. Disruption of the sumoylation enzymatic pathway during the embryonic development leads to lethality revealing a pivotal role for this protein modification during development. The main aim of this review is to briefly describe the SUMO pathway and give an overview of the sumoylation regulations occurring in brain development, neuronal morphology and synapse formation.
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Affiliation(s)
- Carole Gwizdek
- Institut de Pharmacologie Moléculaire et Cellulaire, Laboratory of Excellence 'Network for Innovation on Signal Transduction Pathways in Life Sciences', UMR7275, Centre National de la Recherche Scientifique, University of Nice-Sophia-Antipolis, 660 route des lucioles, 06560, Valbonne, France
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