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López-Merino E, Cuartero MI, Esteban JA, Briz V. Perinatal exposure to pesticides alters synaptic plasticity signaling and induces behavioral deficits associated with neurodevelopmental disorders. Cell Biol Toxicol 2023; 39:2089-2111. [PMID: 35137321 PMCID: PMC10547633 DOI: 10.1007/s10565-022-09697-2] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [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: 09/23/2021] [Accepted: 01/26/2022] [Indexed: 12/17/2022]
Abstract
Increasing evidence from animal and epidemiological studies indicates that perinatal exposure to pesticides cause developmental neurotoxicity and may increase the risk for psychiatric disorders such as autism and intellectual disability. However, the underlying pathogenic mechanisms remain largely elusive. This work was aimed at testing the hypothesis that developmental exposure to different classes of pesticides hijacks intracellular neuronal signaling contributing to synaptic and behavioral alterations associated with neurodevelopmental disorders (NDD). Low concentrations of organochlorine (dieldrin, endosulfan, and chlordane) and organophosphate (chlorpyrifos and its oxon metabolite) pesticides were chronically dosed ex vivo (organotypic rat hippocampal slices) or in vivo (perinatal exposure in rats), and then biochemical, electrophysiological, behavioral, and proteomic studies were performed. All the pesticides tested caused prolonged activation of MAPK/ERK pathway in a concentration-dependent manner. Additionally, some of them impaired metabotropic glutamate receptor-dependent long-term depression (mGluR-LTD). In the case of the pesticide chlordane, the effect was attributed to chronic modulation of MAPK/ERK signaling. These synaptic alterations were reproduced following developmental in vivo exposure to chlordane and chlorpyrifos-oxon, and were also associated with prototypical behavioral phenotypes of NDD, including impaired motor development, increased anxiety, and social and memory deficits. Lastly, proteomic analysis revealed that these pesticides differentially regulate the expression of proteins in the hippocampus with pivotal roles in brain development and synaptic signaling, some of which are associated with NDD. Based on these results, we propose a novel mechanism of synaptic dysfunction, involving chronic overactivation of MAPK and impaired mGluR-LTD, shared by different pesticides which may have important implications for NDD.
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Affiliation(s)
| | - María I Cuartero
- Neurovascular Pathophysiology Group, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain
| | - José A Esteban
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain.
| | - Víctor Briz
- Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain.
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2
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Pedraza N, Monserrat MV, Ferrezuelo F, Torres-Rosell J, Colomina N, Miguez-Cabello F, Párraga JP, Soto D, López-Merino E, García-Vilela C, Esteban JA, Egea J, Garí E. Cyclin D1-Cdk4 regulates neuronal activity through phosphorylation of GABAA receptors. Cell Mol Life Sci 2023; 80:280. [PMID: 37684532 PMCID: PMC10491536 DOI: 10.1007/s00018-023-04920-7] [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: 06/14/2023] [Revised: 08/10/2023] [Accepted: 08/12/2023] [Indexed: 09/10/2023]
Abstract
Nuclear Cyclin D1 (Ccnd1) is a main regulator of cell cycle progression and cell proliferation. Interestingly, Ccnd1 moves to the cytoplasm at the onset of differentiation in neuronal precursors. However, cytoplasmic functions and targets of Ccnd1 in post-mitotic neurons are unknown. Here we identify the α4 subunit of gamma-aminobutyric acid (GABA) type A receptors (GABAARs) as an interactor and target of Ccnd1-Cdk4. Ccnd1 binds to an intracellular loop in α4 and, together with Cdk4, phosphorylates the α4 subunit at threonine 423 and serine 431. These modifications upregulate α4 surface levels, increasing the response of α4-containing GABAARs, measured in whole-cell patch-clamp recordings. In agreement with this role of Ccnd1-Cdk4 in neuronal signalling, inhibition of Cdk4 or expression of the non-phosphorylatable α4 decreases synaptic and extra-synaptic currents in the hippocampus of newborn rats. Moreover, according to α4 functions in synaptic pruning, CCND1 knockout mice display an altered pattern of dendritic spines that is rescued by the phosphomimetic α4. Overall, our findings molecularly link Ccnd1-Cdk4 to GABAARs activity in the central nervous system and highlight a novel role for this G1 cyclin in neuronal signalling.
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Affiliation(s)
- Neus Pedraza
- Cell Cycle, Department of Basic Medical Sciences, Institut de Recerca Biomèdica de Lleida (IRBLLEIDA), University of Lleida, Lleida, Spain.
| | - Ma Ventura Monserrat
- Cell Cycle, Department of Basic Medical Sciences, Institut de Recerca Biomèdica de Lleida (IRBLLEIDA), University of Lleida, Lleida, Spain
| | - Francisco Ferrezuelo
- Cell Cycle, Department of Basic Medical Sciences, Institut de Recerca Biomèdica de Lleida (IRBLLEIDA), University of Lleida, Lleida, Spain
| | - Jordi Torres-Rosell
- Cell Cycle, Department of Basic Medical Sciences, Institut de Recerca Biomèdica de Lleida (IRBLLEIDA), University of Lleida, Lleida, Spain
| | - Neus Colomina
- Cell Cycle, Department of Basic Medical Sciences, Institut de Recerca Biomèdica de Lleida (IRBLLEIDA), University of Lleida, Lleida, Spain
| | - Federico Miguez-Cabello
- Laboratori de Neurofisiologia, Departament de Biomedicina, Facultat de Medicina i Ciències de la Salut, Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
| | - Javier Picañol Párraga
- Laboratori de Neurofisiologia, Departament de Biomedicina, Facultat de Medicina i Ciències de la Salut, Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
| | - David Soto
- Laboratori de Neurofisiologia, Departament de Biomedicina, Facultat de Medicina i Ciències de la Salut, Institut de Neurociències, Universitat de Barcelona, Barcelona, Spain
- Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Hospital Clínic, Universitat de Barcelona, Barcelona, Spain
| | - Esperanza López-Merino
- Department of Molecular Neurobiology, Centro de Biología Molecular 'Severo Ochoa', Consejo Superior de Investigaciones Científicas (CSIC)/Universidad Autónoma de Madrid (UAM), Madrid, Spain
| | - Celia García-Vilela
- Department of Molecular Neurobiology, Centro de Biología Molecular 'Severo Ochoa', Consejo Superior de Investigaciones Científicas (CSIC)/Universidad Autónoma de Madrid (UAM), Madrid, Spain
| | - José A Esteban
- Department of Molecular Neurobiology, Centro de Biología Molecular 'Severo Ochoa', Consejo Superior de Investigaciones Científicas (CSIC)/Universidad Autónoma de Madrid (UAM), Madrid, Spain
| | - Joaquim Egea
- Molecular and Developmental Neurobiology, Dept. Ciències Mèdiques Bàsiques, Facultat de Medicina, Universitat de Lleida/IRBLLEIDA, Rovira Roure 80, 25198, Lleida, Spain
| | - Eloi Garí
- Cell Cycle, Department of Basic Medical Sciences, Institut de Recerca Biomèdica de Lleida (IRBLLEIDA), University of Lleida, Lleida, Spain.
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Carús-Cadavieco M, Berenguer López I, Montoro Canelo A, Serrano-Lope MA, González-de la Fuente S, Aguado B, Fernández-Rodrigo A, Saido TC, Frank García A, Venero C, Esteban JA, Guix F, Dotti CG. Cognitive decline in diabetic mice predisposed to Alzheimer's disease is greater than in wild type. Life Sci Alliance 2023; 6:e202201789. [PMID: 37059474 PMCID: PMC10105330 DOI: 10.26508/lsa.202201789] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Revised: 03/27/2023] [Accepted: 03/28/2023] [Indexed: 04/16/2023] Open
Abstract
In this work, we tested the hypothesis that the development of dementia in individuals with type 2 diabetes (T2DM) requires a genetic background of predisposition to neurodegenerative disease. As a proof of concept, we induced T2DM in middle-aged hAPP NL/F mice, a preclinical model of Alzheimer's disease. We show that T2DM produces more severe behavioral, electrophysiological, and structural alterations in these mice compared with wild-type mice. Mechanistically, the deficits are not paralleled by higher levels of toxic forms of Aβ or by neuroinflammation but by a reduction in γ-secretase activity, lower levels of synaptic proteins, and by increased phosphorylation of tau. RNA-seq analysis of the cerebral cortex of hAPP NL/F and wild-type mice suggests that the former could be more susceptible to T2DM because of defects in trans-membrane transport. The results of this work, on the one hand, confirm the importance of the genetic background in the severity of the cognitive disorders in individuals with T2DM and, on the other hand, suggest, among the involved mechanisms, the inhibition of γ-secretase activity.
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Affiliation(s)
- Marta Carús-Cadavieco
- Molecular Neuropathology Unit, Physiological and Pathological Processes Program, Centro de Biología Molecular Severo Ochoa(CBM), CSIC-UAM, Madrid, Spain
| | - Inés Berenguer López
- Molecular Neuropathology Unit, Physiological and Pathological Processes Program, Centro de Biología Molecular Severo Ochoa(CBM), CSIC-UAM, Madrid, Spain
| | - Alba Montoro Canelo
- Molecular Neuropathology Unit, Physiological and Pathological Processes Program, Centro de Biología Molecular Severo Ochoa(CBM), CSIC-UAM, Madrid, Spain
- Escuela Técnica Superior (E.T.S) de Ingeniería Agronómica, Alimentaria y de Biosistemas, Universidad Politécnica de Madrid, Madrid, Spain
| | - Miguel A Serrano-Lope
- Molecular Neuropathology Unit, Physiological and Pathological Processes Program, Centro de Biología Molecular Severo Ochoa(CBM), CSIC-UAM, Madrid, Spain
| | | | - Begoña Aguado
- Genomics and NGS Facility, Centro de Biología Molecular Severo Ochoa(CBM) CSIC-UAM, Madrid, Spain
| | - Alba Fernández-Rodrigo
- Molecular Neuropathology Unit, Physiological and Pathological Processes Program, Centro de Biología Molecular Severo Ochoa(CBM), CSIC-UAM, Madrid, Spain
| | - Takaomi C Saido
- Laboratory for Proteolytic Neuroscience, RIKEN Center for Brain Science, Saitama, Japan
| | - Ana Frank García
- Department of Neurology, Division Neurodegenerative Disease, University Hospital La Paz, Madrid, Spain
| | - César Venero
- Department of Psychobiology, Universidad Nacional de Educación a Distancia, Madrid, Spain
| | - José A Esteban
- Molecular Neuropathology Unit, Physiological and Pathological Processes Program, Centro de Biología Molecular Severo Ochoa(CBM), CSIC-UAM, Madrid, Spain
| | - Francesc Guix
- Molecular Neuropathology Unit, Physiological and Pathological Processes Program, Centro de Biología Molecular Severo Ochoa(CBM), CSIC-UAM, Madrid, Spain
- Department of Bioengineering, Institut Químic de Sarrià (IQS) - Universitat Ramón Llull (URL), Barcelona, Spain
| | - Carlos G Dotti
- Molecular Neuropathology Unit, Physiological and Pathological Processes Program, Centro de Biología Molecular Severo Ochoa(CBM), CSIC-UAM, Madrid, Spain
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4
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Sánchez-Castillo C, Cuartero MI, Fernández-Rodrigo A, Briz V, López-García S, Jiménez-Sánchez R, López JA, Graupera M, Esteban JA. Functional specialization of different PI3K isoforms for the control of neuronal architecture, synaptic plasticity, and cognition. Sci Adv 2022; 8:eabq8109. [PMID: 36417513 PMCID: PMC9683729 DOI: 10.1126/sciadv.abq8109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Accepted: 10/25/2022] [Indexed: 06/16/2023]
Abstract
Neuronal connectivity and activity-dependent synaptic plasticity are fundamental properties that support brain function and cognitive performance. Phosphatidylinositol 3-kinase (PI3K) intracellular signaling controls multiple mechanisms mediating neuronal growth, synaptic structure, and plasticity. However, it is still unclear how these pleiotropic functions are integrated at molecular and cellular levels. To address this issue, we used neuron-specific virally delivered Cre expression to delete either p110α or p110β (the two major catalytic isoforms of type I PI3K) from the hippocampus of adult mice. We found that dendritic and postsynaptic structures are almost exclusively supported by p110α activity, whereas p110β controls neurotransmitter release and metabotropic glutamate receptor-dependent long-term depression at the presynaptic terminal. In addition to these separate functions, p110α and p110β jointly contribute to N-methyl-d-aspartate receptor-dependent postsynaptic long-term potentiation. This molecular and functional specialization is reflected in different proteomes controlled by each isoform and in distinct behavioral alterations for learning/memory and sociability in mice lacking p110α or p110β.
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Affiliation(s)
- Carla Sánchez-Castillo
- Department of Molecular Neuropathology, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain
| | - María I. Cuartero
- Department of Molecular Neuropathology, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain
| | - Alba Fernández-Rodrigo
- Department of Molecular Neuropathology, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain
| | - Víctor Briz
- Department of Molecular Neuropathology, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain
| | - Sergio López-García
- Department of Molecular Neuropathology, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain
| | - Raquel Jiménez-Sánchez
- Department of Molecular Neuropathology, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain
| | - Juan A. López
- Proteomics Unit, Centro Nacional de Investigaciones Cardiovasculares Carlos III (CNIC), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, Madrid, Spain
| | - Mariona Graupera
- Endothelial Pathobiology and Microenviroment Group, Josep Carreras Leukaemia Research Institute (IJC), 08916 Badalona, Barcelona, Spain
- Centro de Investigación Biomédica en Red de Cáncer (CIBERONC), Instituto de Salud Carlos III, Madrid, Spain
| | - José A. Esteban
- Department of Molecular Neuropathology, Centro de Biología Molecular Severo Ochoa (CSIC-UAM), Madrid, Spain
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Ruiz-Pérez G, Ruiz de Martín Esteban S, Marqués S, Aparicio N, Grande MT, Benito-Cuesta I, Martínez-Relimpio AM, Arnanz MA, Tolón RM, Posada-Ayala M, Cravatt BF, Esteban JA, Romero J, Palenzuela R. Potentiation of amyloid beta phagocytosis and amelioration of synaptic dysfunction upon FAAH deletion in a mouse model of Alzheimer's disease. J Neuroinflammation 2021; 18:223. [PMID: 34587978 PMCID: PMC8482614 DOI: 10.1186/s12974-021-02276-y] [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] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 09/15/2021] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND The complex pathophysiology of Alzheimer's disease (AD) hampers the development of effective treatments. Attempts to prevent neurodegeneration in AD have failed so far, highlighting the need for further clarification of the underlying cellular and molecular mechanisms. Neuroinflammation seems to play a crucial role in disease progression, although its specific contribution to AD pathogenesis remains elusive. We have previously shown that the modulation of the endocannabinoid system (ECS) renders beneficial effects in a context of amyloidosis, which triggers neuroinflammation. In the 5xFAD model, the genetic inactivation of the enzyme that degrades anandamide (AEA), the fatty acid amide hydrolase (FAAH), was associated with a significant amelioration of the memory deficit. METHODS In this work, we use electrophysiology, flow cytometry and molecular analysis to evaluate the cellular and molecular mechanisms underlying the improvement associated to the increased endocannabinoid tone in the 5xFAD mouse- model. RESULTS We demonstrate that the chronic enhancement of the endocannabinoid tone rescues hippocampal synaptic plasticity in the 5xFAD mouse model. At the CA3-CA1 synapse, both basal synaptic transmission and long-term potentiation (LTP) of synaptic transmission are normalized upon FAAH genetic inactivation, in a CB1 receptor (CB1R)- and TRPV1 receptor-independent manner. Dendritic spine density in CA1 pyramidal neurons, which is notably decreased in 6-month-old 5xFAD animals, is also restored. Importantly, we reveal that the expression of microglial factors linked to phagocytic activity, such as TREM2 and CTSD, and other factors related to amyloid beta clearance and involved in neuron-glia crosstalk, such as complement component C3 and complement receptor C3AR, are specifically upregulated in 5xFAD/FAAH-/- animals. CONCLUSION In summary, our findings support the therapeutic potential of modulating, rather than suppressing, neuroinflammation in Alzheimer's disease. In our model, the long-term enhancement of the endocannabinoid tone triggered augmented microglial activation and amyloid beta phagocytosis, and a consequent reversal in the neuronal phenotype associated to the disease.
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Affiliation(s)
- Gonzalo Ruiz-Pérez
- Faculty of Experimental Sciences, Universidad Francisco de Vitoria, Pozuelo de Alarcón, 28223, Madrid, Spain
| | | | - Sharai Marqués
- Faculty of Experimental Sciences, Universidad Francisco de Vitoria, Pozuelo de Alarcón, 28223, Madrid, Spain
| | - Noelia Aparicio
- Faculty of Experimental Sciences, Universidad Francisco de Vitoria, Pozuelo de Alarcón, 28223, Madrid, Spain
| | - M Teresa Grande
- Faculty of Experimental Sciences, Universidad Francisco de Vitoria, Pozuelo de Alarcón, 28223, Madrid, Spain
| | - Irene Benito-Cuesta
- Faculty of Experimental Sciences, Universidad Francisco de Vitoria, Pozuelo de Alarcón, 28223, Madrid, Spain
| | - Ana M Martínez-Relimpio
- Faculty of Experimental Sciences, Universidad Francisco de Vitoria, Pozuelo de Alarcón, 28223, Madrid, Spain
| | - M Andrea Arnanz
- Faculty of Experimental Sciences, Universidad Francisco de Vitoria, Pozuelo de Alarcón, 28223, Madrid, Spain
| | - Rosa M Tolón
- Faculty of Experimental Sciences, Universidad Francisco de Vitoria, Pozuelo de Alarcón, 28223, Madrid, Spain
| | - María Posada-Ayala
- Faculty of Experimental Sciences, Universidad Francisco de Vitoria, Pozuelo de Alarcón, 28223, Madrid, Spain
| | - Benjamin F Cravatt
- The Skaggs Institute for Chemical Biology and Departments of Cell Biology and Chemistry, The Scripps Research Institute, La Jolla, San Diego, CA, 92037, USA
| | - José A Esteban
- Centro de Biología Molecular Severo Ochoa, CSIC-Universidad Autónoma de Madrid, 28049, Madrid, Spain
| | - Julián Romero
- Faculty of Experimental Sciences, Universidad Francisco de Vitoria, Pozuelo de Alarcón, 28223, Madrid, Spain.
| | - Rocío Palenzuela
- Faculty of Experimental Sciences, Universidad Francisco de Vitoria, Pozuelo de Alarcón, 28223, Madrid, Spain.
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6
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Brachet A, Lario A, Fernández-Rodrigo A, Heisler FF, Gutiérrez Y, Lobo C, Kneussel M, Esteban JA. A kinesin 1-protrudin complex mediates AMPA receptor synaptic removal during long-term depression. Cell Rep 2021; 36:109499. [PMID: 34348158 DOI: 10.1016/j.celrep.2021.109499] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 05/19/2021] [Accepted: 07/14/2021] [Indexed: 10/20/2022] Open
Abstract
The synaptic removal of AMPA-type glutamate receptors (AMPARs) is a core mechanism for hippocampal long-term depression (LTD). In this study, we address the role of microtubule-dependent transport of AMPARs as a driver for vesicular trafficking and sorting during LTD. Here, we show that the kinesin-1 motor KIF5A/C is strictly required for LTD expression in CA3-to-CA1 hippocampal synapses. Specifically, we find that KIF5 is required for an efficient internalization of AMPARs after NMDA receptor activation. We show that the KIF5/AMPAR complex is assembled in an activity-dependent manner and associates with microsomal membranes upon LTD induction. This interaction is facilitated by the vesicular adaptor protrudin, which is also required for LTD expression. We propose that protrudin links KIF5-dependent transport to endosomal sorting, preventing AMPAR recycling to synapses after LTD induction. Therefore, this work identifies an activity-dependent molecular motor and the vesicular adaptor protein that executes AMPAR synaptic removal during LTD.
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Affiliation(s)
- Anna Brachet
- Centro de Biología Molecular Severo Ochoa, CSIC-Universidad Autónoma de Madrid, 28049 Madrid, Spain.
| | - Argentina Lario
- Centro de Biología Molecular Severo Ochoa, CSIC-Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Alba Fernández-Rodrigo
- Centro de Biología Molecular Severo Ochoa, CSIC-Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Frank F Heisler
- Center for Molecular Neurobiology (ZMNH), University Medical Center Hamburg-Eppendorf (UKE), D-20251 Hamburg, Germany
| | - Yolanda Gutiérrez
- Centro de Biología Molecular Severo Ochoa, CSIC-Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Clara Lobo
- Centro de Biología Molecular Severo Ochoa, CSIC-Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Matthias Kneussel
- Center for Molecular Neurobiology (ZMNH), University Medical Center Hamburg-Eppendorf (UKE), D-20251 Hamburg, Germany
| | - José A Esteban
- Centro de Biología Molecular Severo Ochoa, CSIC-Universidad Autónoma de Madrid, 28049 Madrid, Spain.
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7
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Sánchez-Puelles C, Calleja-Felipe M, Ouro A, Bougamra G, Arroyo A, Diez I, Erramuzpe A, Cortés J, Martínez-Hernández J, Luján R, Navarrete M, Venero C, Chan A, Morales M, Esteban JA, Knafo S. PTEN Activity Defines an Axis for Plasticity at Cortico-Amygdala Synapses and Influences Social Behavior. Cereb Cortex 2021; 30:505-524. [PMID: 31240311 DOI: 10.1093/cercor/bhz103] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 12/17/2018] [Revised: 03/29/2019] [Accepted: 04/25/2019] [Indexed: 12/11/2022] Open
Abstract
Phosphatase and tensin homolog on chromosome 10 (PTEN) is a tumor suppressor and autism-associated gene that exerts an important influence over neuronal structure and function during development. In addition, it participates in synaptic plasticity processes in adulthood. As an attempt to assess synaptic and developmental mechanisms by which PTEN can modulate cognitive function, we studied the consequences of 2 different genetic manipulations in mice: presence of additional genomic copies of the Pten gene (Ptentg) and knock-in of a truncated Pten gene lacking its PDZ motif (Pten-ΔPDZ), which is required for interaction with synaptic proteins. Ptentg mice exhibit substantial microcephaly, structural hypoconnectivity, enhanced synaptic depression at cortico-amygdala synapses, reduced anxiety, and intensified social interactions. In contrast, Pten-ΔPDZ mice have a much more restricted phenotype, with normal synaptic connectivity, but impaired synaptic depression at cortico-amygdala synapses and virtually abolished social interactions. These results suggest that synaptic actions of PTEN in the amygdala contribute to specific behavioral traits, such as sociability. Also, PTEN appears to function as a bidirectional rheostat in the amygdala: reduction in PTEN activity at synapses is associated with less sociability, whereas enhanced PTEN activity accompanies hypersocial behavior.
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Affiliation(s)
- Cristina Sánchez-Puelles
- Molecular Cognition Laboratory, Biophysics Institute, Consejo Superior de Investigaciones Cientificas (CSIC)-University of the Basque Country (UPV)/Euskal Herriko University (EHU), Campus Universidad del País Vasco, 48940 Leioa, Spain.,Department of Molecular Neurobiology, Centro de Biología Molecular Severo Ochoa, CSIC/Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - María Calleja-Felipe
- Molecular Cognition Laboratory, Biophysics Institute, Consejo Superior de Investigaciones Cientificas (CSIC)-University of the Basque Country (UPV)/Euskal Herriko University (EHU), Campus Universidad del País Vasco, 48940 Leioa, Spain
| | - Alberto Ouro
- Molecular Cognition Laboratory, Biophysics Institute, Consejo Superior de Investigaciones Cientificas (CSIC)-University of the Basque Country (UPV)/Euskal Herriko University (EHU), Campus Universidad del País Vasco, 48940 Leioa, Spain
| | - Ghassen Bougamra
- Molecular Cognition Laboratory, Biophysics Institute, Consejo Superior de Investigaciones Cientificas (CSIC)-University of the Basque Country (UPV)/Euskal Herriko University (EHU), Campus Universidad del País Vasco, 48940 Leioa, Spain
| | - Ana Arroyo
- Molecular Cognition Laboratory, Biophysics Institute, Consejo Superior de Investigaciones Cientificas (CSIC)-University of the Basque Country (UPV)/Euskal Herriko University (EHU), Campus Universidad del País Vasco, 48940 Leioa, Spain
| | - Ibai Diez
- Computational Neuroimaging Laboratory, Biocruces Health Research Institute, 48903 Barakaldo, Spain
| | - Asier Erramuzpe
- Computational Neuroimaging Laboratory, Biocruces Health Research Institute, 48903 Barakaldo, Spain
| | - Jesús Cortés
- Computational Neuroimaging Laboratory, Biocruces Health Research Institute, 48903 Barakaldo, Spain.,Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
| | - José Martínez-Hernández
- Department of Biochemistry and Molecular Biology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain
| | - Rafael Luján
- Department of Biochemistry and Molecular Biology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), 48940 Leioa, Spain
| | - Marta Navarrete
- Department of Molecular Neurobiology, Centro de Biología Molecular Severo Ochoa, CSIC/Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - César Venero
- Department of Psychobiology, Universidad Nacional de Educación a Distancia, 28040 Madrid, Spain
| | - Andrew Chan
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Miguel Morales
- Molecular Cognition Laboratory, Biophysics Institute, Consejo Superior de Investigaciones Cientificas (CSIC)-University of the Basque Country (UPV)/Euskal Herriko University (EHU), Campus Universidad del País Vasco, 48940 Leioa, Spain
| | - José A Esteban
- Department of Molecular Neurobiology, Centro de Biología Molecular Severo Ochoa, CSIC/Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Shira Knafo
- Molecular Cognition Laboratory, Biophysics Institute, Consejo Superior de Investigaciones Cientificas (CSIC)-University of the Basque Country (UPV)/Euskal Herriko University (EHU), Campus Universidad del País Vasco, 48940 Leioa, Spain.,Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain.,Department of Physiology and Cell Biology and National Institute of Biotechnology in the Negev, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, 8410501 Israel
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8
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Gutiérrez Y, López-García S, Lario A, Gutiérrez-Eisman S, Delevoye C, Esteban JA. KIF13A drives AMPA receptor synaptic delivery for long-term potentiation via endosomal remodeling. J Cell Biol 2021; 220:212112. [PMID: 33999113 PMCID: PMC8129809 DOI: 10.1083/jcb.202003183] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [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: 03/30/2020] [Revised: 02/16/2021] [Accepted: 03/31/2021] [Indexed: 02/06/2023] Open
Abstract
The regulated trafficking of AMPA-type glutamate receptors (AMPARs) from dendritic compartments to the synaptic membrane in response to neuronal activity is a core mechanism for long-term potentiation (LTP). However, the contribution of the microtubule cytoskeleton to this synaptic transport is still unknown. In this work, using electrophysiological, biochemical, and imaging techniques, we have found that one member of the kinesin-3 family of motor proteins, KIF13A, is specifically required for the delivery of AMPARs to the spine surface during LTP induction. Accordingly, KIF13A depletion from hippocampal slices abolishes LTP expression. We also identify the vesicular protein centaurin-α1 as part of a motor transport machinery that is engaged with KIF13A and AMPARs upon LTP induction. Finally, we determine that KIF13A is responsible for the remodeling of Rab11-FIP2 endosomal structures in the dendritic shaft during LTP. Overall, these results identify specific kinesin molecular motors and endosomal transport machinery that catalyzes the dendrite-to-synapse translocation of AMPA receptors during synaptic plasticity.
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Affiliation(s)
- Yolanda Gutiérrez
- Molecular Neuropathology Unit, Centro de Biología Molecular Severo Ochoa (Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid), Madrid, Spain
| | - Sergio López-García
- Molecular Neuropathology Unit, Centro de Biología Molecular Severo Ochoa (Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid), Madrid, Spain
| | - Argentina Lario
- Molecular Neuropathology Unit, Centro de Biología Molecular Severo Ochoa (Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid), Madrid, Spain
| | - Silvia Gutiérrez-Eisman
- Molecular Neuropathology Unit, Centro de Biología Molecular Severo Ochoa (Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid), Madrid, Spain
| | - Cédric Delevoye
- Institut Curie, Paris Sciences et Lettres Research University, Centre National de la Recherche Scientifique, UMR144, Structure and Membrane Compartments, Paris, France.,Institut Curie, Paris Sciences et Lettres Research University, Centre National de la Recherche Scientifique, UMR144, Cell and Tissue Imaging Facility, Paris, France
| | - José A Esteban
- Molecular Neuropathology Unit, Centro de Biología Molecular Severo Ochoa (Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid), Madrid, Spain
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9
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Esparza-Moltó PB, Romero-Carramiñana I, Núñez de Arenas C, Pereira MP, Blanco N, Pardo B, Bates GR, Sánchez-Castillo C, Artuch R, Murphy MP, Esteban JA, Cuezva JM. Generation of mitochondrial reactive oxygen species is controlled by ATPase inhibitory factor 1 and regulates cognition. PLoS Biol 2021; 19:e3001252. [PMID: 33983919 PMCID: PMC8148373 DOI: 10.1371/journal.pbio.3001252] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 05/25/2021] [Accepted: 04/29/2021] [Indexed: 11/18/2022] Open
Abstract
The mitochondrial ATP synthase emerges as key hub of cellular functions controlling the production of ATP, cellular signaling, and fate. It is regulated by the ATPase inhibitory factor 1 (IF1), which is highly abundant in neurons. Herein, we ablated or overexpressed IF1 in mouse neurons to show that IF1 dose defines the fraction of active/inactive enzyme in vivo, thereby controlling mitochondrial function and the production of mitochondrial reactive oxygen species (mtROS). Transcriptomic, proteomic, and metabolomic analyses indicate that IF1 dose regulates mitochondrial metabolism, synaptic function, and cognition. Ablation of IF1 impairs memory, whereas synaptic transmission and learning are enhanced by IF1 overexpression. Mechanistically, quenching the IF1-mediated increase in mtROS production in mice overexpressing IF1 reduces the increased synaptic transmission and obliterates the learning advantage afforded by the higher IF1 content. Overall, IF1 plays a key role in neuronal function by regulating the fraction of ATP synthase responsible for mitohormetic mtROS signaling.
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Affiliation(s)
- Pau B. Esparza-Moltó
- Departamento de Biología Molecular, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain
- Instituto de Investigación Hospital 12 de Octubre, Madrid, Spain
| | - Inés Romero-Carramiñana
- Departamento de Biología Molecular, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain
- Instituto de Investigación Hospital 12 de Octubre, Madrid, Spain
| | - Cristina Núñez de Arenas
- Departamento de Biología Molecular, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain
- Instituto de Investigación Hospital 12 de Octubre, Madrid, Spain
| | - Marta P. Pereira
- Departamento de Biología Molecular, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
| | - Noelia Blanco
- Departamento de Biología Molecular, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain
- Instituto de Investigación Hospital 12 de Octubre, Madrid, Spain
| | - Beatriz Pardo
- Departamento de Biología Molecular, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
| | - Georgina R. Bates
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, United Kingdom
- Department of Medicine, University of Cambridge, Addenbrooke’s Hospital, Cambridge, United Kingdom
| | - Carla Sánchez-Castillo
- Unidad de Neuropatología Molecular, Centro de Biología Molecular Severo Ochoa, Madrid, Spain
| | - Rafael Artuch
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain
- Departamento de Bioquímica Clínica, Institut de Recerca Sant Joan de Déu, Barcelona, Spain
| | - Michael P. Murphy
- MRC Mitochondrial Biology Unit, University of Cambridge, Cambridge, United Kingdom
- Department of Medicine, University of Cambridge, Addenbrooke’s Hospital, Cambridge, United Kingdom
| | - José A. Esteban
- Unidad de Neuropatología Molecular, Centro de Biología Molecular Severo Ochoa, Madrid, Spain
| | - José M. Cuezva
- Departamento de Biología Molecular, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), ISCIII, Madrid, Spain
- Instituto de Investigación Hospital 12 de Octubre, Madrid, Spain
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10
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Ribeiro LF, Catarino T, Carvalho M, Cortes L, Santos SD, Opazo PO, Ribeiro LR, Oliveiros B, Choquet D, Esteban JA, Peça J, Carvalho AL. Ligand-independent activity of the ghrelin receptor modulates AMPA receptor trafficking and supports memory formation. Sci Signal 2021; 14:14/670/eabb1953. [PMID: 33593997 DOI: 10.1126/scisignal.abb1953] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
The biological signals of hunger, satiety, and memory are interconnected. The role of the hormone ghrelin in regulating feeding and memory makes ghrelin receptors attractive targets for associated disorders. We investigated the effects of the high ligand-independent activity of the ghrelin receptor GHS-R1a on the physiology of excitatory synapses in the hippocampus. Blocking this activity produced a decrease in the synaptic content of AMPA receptors in hippocampal neurons and a reduction in GluA1 phosphorylation at Ser845 Reducing the ligand-independent activity of GHS-R1a increased the surface diffusion of AMPA receptors and impaired AMPA receptor-dependent synaptic delivery induced by chemical long-term potentiation. Accordingly, we found that blocking this GHS-R1a activity impaired spatial and recognition memory in mice. These observations support a role for the ligand-independent activity of GHS-R1a in regulating AMPA receptor trafficking under basal conditions and in the context of synaptic plasticity that underlies learning.
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Affiliation(s)
- Luís F Ribeiro
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.
| | - Tatiana Catarino
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.,University of Coimbra, IIIUC-Institute for Interdisciplinary Research, 3030-789 Coimbra, Portugal
| | - Mário Carvalho
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.,MIT-Portugal Bioengineering Systems Doctoral Program, NOVA University of Lisbon, 1099-85, Lisboa, Portugal
| | - Luísa Cortes
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.,University of Coimbra, IIIUC-Institute for Interdisciplinary Research, 3030-789 Coimbra, Portugal
| | - Sandra D Santos
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.,University of Coimbra, IIIUC-Institute for Interdisciplinary Research, 3030-789 Coimbra, Portugal
| | - Patricio O Opazo
- University of Bordeaux, Interdisciplinary Institute for Neuroscience, UMR 5297, 33000 Bordeaux, France.,CNRS, UMR 5297, 33000 Bordeaux, France
| | - Lyn Rosenbrier Ribeiro
- Functional and Mechanistic Safety, Clinical Pharmacology and Safety Sciences, R&D AstraZeneca, Cambridge CB2 0SL, UK
| | - Bárbara Oliveiros
- Laboratory of Biostatistics and Medical Informatics (LBIM), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal.,Coimbra Institute for Clinical and Biomedical Research (iCBR), Faculty of Medicine, University of Coimbra, 3000-548 Coimbra, Portugal
| | - Daniel Choquet
- University of Bordeaux, Interdisciplinary Institute for Neuroscience, UMR 5297, 33000 Bordeaux, France.,CNRS, UMR 5297, 33000 Bordeaux, France.,Bordeaux Imaging Center, UMS 3420, CNRS-Bordeaux University, US4 INSERM, 33000 Bordeaux, France
| | - José A Esteban
- Department of Molecular Neurobiology, Centro de Biología Molecular "Severo Ochoa," Consejo Superior de Investigaciones Científicas (CSIC)/Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - João Peça
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal.,University of Coimbra, Department of Life Sciences, 3000-456 Coimbra, Portugal
| | - Ana Luísa Carvalho
- CNC-Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal. .,University of Coimbra, Department of Life Sciences, 3000-456 Coimbra, Portugal
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11
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Chan AML, Baum L, Chang RCC, Esteban JA, Lin ZX, Wong YH, Yung WH. Targeted drug discovery for Alzheimer disease: abridged secondary publication. Hong Kong Med J 2020; 26 Suppl 7:20-22. [PMID: 33229613] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023] Open
Affiliation(s)
- A M L Chan
- School of Biomedical Sciences, The Chinese University of Hong Kong
| | - L Baum
- School of Pharmacy, The Chinese University of Hong Kong
| | - R C C Chang
- School of Biomedical Sciences, The Chinese University of Hong Kong
| | - J A Esteban
- Department of Molecular Neurobiology, Centro de Biología Molecular 'Severo Ochoa', Consejo Superior de Investigaciones Científicas (CSIC), Spain
| | - Z X Lin
- School of Chinese Medicine, The Chinese University of Hong Kong
| | - Y H Wong
- Division of Life Science, The Hong Kong University of Science and Technology
| | - W H Yung
- School of Biomedical Sciences, The Chinese University of Hong Kong
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12
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Draffin JE, Sánchez-Castillo C, Fernández-Rodrigo A, Sánchez-Sáez X, Ávila J, Wagner FF, Esteban JA. GSK3α, not GSK3β, drives hippocampal NMDAR-dependent LTD via tau-mediated spine anchoring. EMBO J 2020; 40:e105513. [PMID: 33197065 DOI: 10.15252/embj.2020105513] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [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: 05/04/2020] [Revised: 10/08/2020] [Accepted: 10/13/2020] [Indexed: 11/09/2022] Open
Abstract
Glycogen synthase kinase-3 (GSK3) is an important signalling protein in the brain and modulates different forms of synaptic plasticity. Neuronal functions of GSK3 are typically attributed to one of its two isoforms, GSK3β, simply because of its prevalent expression in the brain. Consequently, the importance of isoform-specific functions of GSK3 in synaptic plasticity has not been fully explored. We now directly address this question for NMDA receptor-dependent long-term depression (LTD) in the hippocampus. Here, we specifically target the GSK3 isoforms with shRNA knock-down in mouse hippocampus and with novel isoform-selective drugs to dissect their roles in LTD. Using electrophysiological and live imaging approaches, we find that GSK3α, but not GSK3β, is required for LTD. The specific engagement of GSK3α occurs via its transient anchoring in dendritic spines during LTD induction. We find that the major GSK3 substrate, the microtubule-binding protein tau, is required for this spine anchoring of GSK3α and mediates GSK3α-induced LTD. These results link GSK3α and tau in a common mechanism for synaptic depression and rule out a major role for GSK3β in this process.
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Affiliation(s)
- Jonathan E Draffin
- Centro de Biología Molecular Severo Ochoa, CSIC-Universidad Autónoma de Madrid, Madrid, Spain
| | - Carla Sánchez-Castillo
- Centro de Biología Molecular Severo Ochoa, CSIC-Universidad Autónoma de Madrid, Madrid, Spain
| | - Alba Fernández-Rodrigo
- Centro de Biología Molecular Severo Ochoa, CSIC-Universidad Autónoma de Madrid, Madrid, Spain
| | - Xavier Sánchez-Sáez
- Centro de Biología Molecular Severo Ochoa, CSIC-Universidad Autónoma de Madrid, Madrid, Spain
| | - Jesús Ávila
- Centro de Biología Molecular Severo Ochoa, CSIC-Universidad Autónoma de Madrid, Madrid, Spain
| | - Florence F Wagner
- Stanley Center for Psychiatric Research, Broad Institute of Massachusetts Institute of Technology and Harvard University, Cambridge, MA, USA
| | - José A Esteban
- Centro de Biología Molecular Severo Ochoa, CSIC-Universidad Autónoma de Madrid, Madrid, Spain
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13
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Sánchez-Puelles C, Calleja-Felipe M, Ouro A, Bougamra G, Arroyo A, Diez I, Erramuzpe A, Cortés J, Martínez-Hernández J, Luján R, Navarrete M, Venero C, Chan A, Morales M, Esteban JA, Knafo S. Corrigendum to: -PTEN activity defines an axis for plasticity at cortico-amygdala synapses and influences social behavior. Cereb Cortex 2020; 30:849. [PMID: 31560052 DOI: 10.1093/cercor/bhz232] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 03/29/2019] [Accepted: 04/25/2019] [Indexed: 11/13/2022] Open
Affiliation(s)
- Cristina Sánchez-Puelles
- Molecular Cognition Laboratory, Biophysics Institute, Consejo Superior de Investigaciones Cientificas (CSIC)-University of the Basque Country (UPV)/Euskal Herriko University (EHU), Campus Universidad del País Vasco, 48940 Leioa, Spain.,Department of Molecular Neurobiology, Centro de Biología Molecular Severo Ochoa, CSIC/Universidad Autónoma de Madrid, 28049 Madrid, Spain.,Instituto Cajal, CSIC, 28002 Madrid, Spain
| | - María Calleja-Felipe
- Molecular Cognition Laboratory, Biophysics Institute, Consejo Superior de Investigaciones Cientificas (CSIC)-University of the Basque Country (UPV)/Euskal Herriko University (EHU), Campus Universidad del País Vasco, 48940 Leioa, Spain
| | - Alberto Ouro
- Molecular Cognition Laboratory, Biophysics Institute, Consejo Superior de Investigaciones Cientificas (CSIC)-University of the Basque Country (UPV)/Euskal Herriko University (EHU), Campus Universidad del País Vasco, 48940 Leioa, Spain
| | - Ghassen Bougamra
- Molecular Cognition Laboratory, Biophysics Institute, Consejo Superior de Investigaciones Cientificas (CSIC)-University of the Basque Country (UPV)/Euskal Herriko University (EHU), Campus Universidad del País Vasco, 48940 Leioa, Spain
| | - Ana Arroyo
- Molecular Cognition Laboratory, Biophysics Institute, Consejo Superior de Investigaciones Cientificas (CSIC)-University of the Basque Country (UPV)/Euskal Herriko University (EHU), Campus Universidad del País Vasco, 48940 Leioa, Spain
| | - Ibai Diez
- Computational Neuroimaging Laboratory, Biocruces Health Research Institute, 48903 Barakaldo, Spain
| | - Asier Erramuzpe
- Computational Neuroimaging Laboratory, Biocruces Health Research Institute, 48903 Barakaldo, Spain
| | - Jesús Cortés
- Computational Neuroimaging Laboratory, Biocruces Health Research Institute, 48903 Barakaldo, Spain.,Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain
| | - José Martínez-Hernández
- Synaptic Structure Laboratory, Instituto de Investigación en Discapacidades Neurológicas, Departamento Ciencias Médicas, Facultad de Medicina, Universidad Castilla-La Mancha, 02008 Albacete, Spain
| | - Rafael Luján
- Synaptic Structure Laboratory, Instituto de Investigación en Discapacidades Neurológicas, Departamento Ciencias Médicas, Facultad de Medicina, Universidad Castilla-La Mancha, 02008 Albacete, Spain
| | - Marta Navarrete
- Department of Molecular Neurobiology, Centro de Biología Molecular Severo Ochoa, CSIC/Universidad Autónoma de Madrid, 28049 Madrid, Spain.,Instituto Cajal, CSIC, 28002 Madrid, Spain
| | - César Venero
- Department of Psychobiology, Universidad Nacional de Educación a Distancia, 28040 Madrid, Spain
| | - Andrew Chan
- School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong Special Administrative Region, China
| | - Miguel Morales
- Molecular Cognition Laboratory, Biophysics Institute, Consejo Superior de Investigaciones Cientificas (CSIC)-University of the Basque Country (UPV)/Euskal Herriko University (EHU), Campus Universidad del País Vasco, 48940 Leioa, Spain
| | - José A Esteban
- Department of Molecular Neurobiology, Centro de Biología Molecular Severo Ochoa, CSIC/Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Shira Knafo
- Molecular Cognition Laboratory, Biophysics Institute, Consejo Superior de Investigaciones Cientificas (CSIC)-University of the Basque Country (UPV)/Euskal Herriko University (EHU), Campus Universidad del País Vasco, 48940 Leioa, Spain.,Ikerbasque, Basque Foundation for Science, 48013 Bilbao, Spain.,Department of Physiology and Cell Biology and National Institute of Biotechnology in the Negev, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, 8410501 Israel
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14
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Royo M, Gutiérrez Y, Fernández-Monreal M, Gutiérrez-Eisman S, Jiménez R, Jurado S, Esteban JA. A retention-release mechanism based on RAB11FIP2 for AMPA receptor synaptic delivery during long-term potentiation. J Cell Sci 2019; 132:jcs.234237. [PMID: 31757887 DOI: 10.1242/jcs.234237] [Citation(s) in RCA: 7] [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: 05/10/2019] [Accepted: 11/15/2019] [Indexed: 02/05/2023] Open
Abstract
It is well--established that Rab11-dependent recycling endosomes drive the activity-dependent delivery of AMPA receptors (AMPARs) into synapses during long-term potentiation (LTP). Nevertheless, the molecular basis for this specialized function of recycling endosomes is still unknown. Here, we have investigated RAB11FIP2 (FIP2 hereafter) as a potential effector of Rab11-dependent trafficking during LTP in rat hippocampal slices. Surprisingly, we found that FIP2 operates independently from Rab11 proteins, and acts as a negative regulator of AMPAR synaptic trafficking. Under basal conditions, FIP2 associates with AMPARs at immobile compartments, separately from recycling endosomes. Using shRNA-mediated knockdown, we found that FIP2 prevents GluA1 (encoded by the Gria1 gene) AMPARs from reaching the surface of dendritic spines in the absence of neuronal stimulation. Upon induction of LTP, FIP2 is rapidly mobilized, dissociates from AMPARs and undergoes dephosphorylation. Interestingly, this dissociation of the FIP2-AMPAR complex, together with FIP2 dephosphorylation, is required for LTP, but the interaction between FIP2 and Rab11 proteins is not. Based on these results, we propose a retention-release mechanism, where FIP2 acts as a gate that restricts the trafficking of AMPARs, until LTP induction triggers their release and allows synaptic delivery.
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Affiliation(s)
- María Royo
- Department of Neurobiology, Centro de Biología Molecular 'Severo Ochoa' (CSIC-UAM), 28049 Madrid, Spain
| | - Yolanda Gutiérrez
- Department of Neurobiology, Centro de Biología Molecular 'Severo Ochoa' (CSIC-UAM), 28049 Madrid, Spain
| | - Mónica Fernández-Monreal
- Department of Neurobiology, Centro de Biología Molecular 'Severo Ochoa' (CSIC-UAM), 28049 Madrid, Spain
| | - Silvia Gutiérrez-Eisman
- Department of Neurobiology, Centro de Biología Molecular 'Severo Ochoa' (CSIC-UAM), 28049 Madrid, Spain
| | - Raquel Jiménez
- Department of Neurobiology, Centro de Biología Molecular 'Severo Ochoa' (CSIC-UAM), 28049 Madrid, Spain
| | - Sandra Jurado
- Instituto de Neurociencias CSIC-UMH, 03550 San Juan de Alicante, Spain
| | - José A Esteban
- Department of Neurobiology, Centro de Biología Molecular 'Severo Ochoa' (CSIC-UAM), 28049 Madrid, Spain
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15
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Casadomé-Perales Á, Matteis LD, Alleva M, Infantes-Rodríguez C, Palomares-Pérez I, Saito T, Saido TC, Esteban JA, Nebreda AR, de la Fuente JM, Dotti CG. Inhibition of p38 MAPK in the brain through nasal administration of p38 inhibitor loaded in chitosan nanocapsules. Nanomedicine (Lond) 2019; 14:2409-2422. [PMID: 31456488 DOI: 10.2217/nnm-2018-0496] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023] Open
Abstract
Aim: To determine whether a p38 MAPK inhibitor incorporated into nanoemulsion-based chitosan nanocapsules can reduce the activity of this kinase in the brain through their nasal administration in mice. Materials & methods: We selected the p38 MAPK inhibitor PH797804, an ATP-competitive inhibitor of p38α encapsulated in nanoemulsion-based chitosan nanocapsules. Biological effect was evaluated in microglial and neuronal cells in vitro and in ex vivo and in vivo systems, in a mouse model of Alzheimer's disease. Results: Encapsulated inhibitor retains enzymatic inhibitory activity and tissue penetration capacity in vitro, ex vivo and in vivo. Conclusion: Nasal administration of chitosan nanocapsules can be an effective approach for brain-restricted reduction of p38 MAPK activity, thus reducing the side effects of systemic administration.
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Affiliation(s)
- Álvaro Casadomé-Perales
- Department of Molecular Neuropathology, Centro de Biología Molecular Severo Ochoa, CSIC/UAM, 28049 Madrid, Spain
| | - Laura De Matteis
- Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza & CIBER-BBN, 50018 Zaragoza, Spain
| | - Maria Alleva
- Instituto de Nanociencia de Aragón (INA), Universidad de Zaragoza & CIBER-BBN, 50018 Zaragoza, Spain
| | - Cristina Infantes-Rodríguez
- Department of Molecular Neuropathology, Centro de Biología Molecular Severo Ochoa, CSIC/UAM, 28049 Madrid, Spain
| | - Irene Palomares-Pérez
- Department of Molecular Neuropathology, Centro de Biología Molecular Severo Ochoa, CSIC/UAM, 28049 Madrid, Spain
| | - Takashi Saito
- Laboratory for Proteolytic Neuroscience, RIKEN Center for Brain Science, Saitama 351-0106, Japan
| | - Takaomi C Saido
- Laboratory for Proteolytic Neuroscience, RIKEN Center for Brain Science, Saitama 351-0106, Japan
| | - José A Esteban
- Department of Molecular Neuropathology, Centro de Biología Molecular Severo Ochoa, CSIC/UAM, 28049 Madrid, Spain
| | - Angel R Nebreda
- Institute for Research in Biomedicine (IRB Barcelona), The Barcelona Institute of Science & Technology, & ICREA, 08028 Barcelona, Spain
| | - Jesús M de la Fuente
- Instituto de Ciencia de Materiales de Aragón (ICMA), CSIC-Universidad de Zaragoza & CIBER-BBN, 50018 Zaragoza, Spain
| | - Carlos G Dotti
- Department of Molecular Neuropathology, Centro de Biología Molecular Severo Ochoa, CSIC/UAM, 28049 Madrid, Spain
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16
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Genoud NW, Alonso Serena M, Díaz MH, Esteban JA, Peroni JH, Giunta DH, Grande Ratti MF, Martínez B. [Assessment of an educational intervention regarding blood cultures as process indicators in an emergency department in Argentina]. J Healthc Qual Res 2018; 33:278-283. [PMID: 30401423 DOI: 10.1016/j.jhqr.2018.05.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [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: 02/07/2018] [Revised: 05/08/2018] [Accepted: 05/10/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVE The aim of this study was to describe 2 process indicators related to taking blood cultures (BC) in an Adult Emergency Department of a tertiary university hospital in Buenos Aires,and to describe the changes after a series of educational activities for health professionals was implemented during May 2016 as regards the appropriate indication of BC and the proper collection technique. MATERIALS AND METHODS A retrospective cohort study was designed to assess its effectiveness, which consecutively included all patients admitted during 2015-2016. The BC request rate was used as a process indicator, and the percentage of contaminated BCs and the true positives rate were used as quality indicators. Both were measured monthly and prospectively during the period of study. RESULTS The annual adjusted rate of BC requests was 4.9% (95% CI 4.8-5) in 2015 and 2.9% (95% CI 2.8-2.9) in 2016. The rate of false positive (contaminated) BCs was 4.5% in 2015 and 4.3% after the educational intervention. The true positive BCs were 8.3% in 2015 and 12% post-intervention. CONCLUSIONS These findings prove how important and effective the educational interventions are.
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Affiliation(s)
- N W Genoud
- Sección de Infectología, Clínica Médica, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina; Central de Emergencias de Adultos, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - M Alonso Serena
- Área de Investigación en Medicina Interna, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina.
| | - M H Díaz
- Central de Emergencias de Adultos, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina; Clínica Médica, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - J A Esteban
- Central de Emergencias de Adultos, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina; Clínica Médica, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - J H Peroni
- Central de Emergencias de Adultos, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina; Sección de Neumonología, Clínica Médica, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - D H Giunta
- Área de Investigación en Medicina Interna, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina; Clínica Médica, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina; Departamento de Investigación, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
| | - M F Grande Ratti
- Área de Investigación en Medicina Interna, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina; Servicio de Medicina Familiar y Comunitaria, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina; Área Epidemiológica, Dirección de Promoción de la Salud y Control de Enfermedades no Transmisibles, Ministerio de Salud de la Nación, Buenos Aires, Argentina
| | - B Martínez
- Central de Emergencias de Adultos, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina; Clínica Médica, Hospital Italiano de Buenos Aires, Buenos Aires, Argentina
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17
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González-Sánchez P, Del Arco A, Esteban JA, Satrústegui J. Store-Operated Calcium Entry Is Required for mGluR-Dependent Long Term Depression in Cortical Neurons. Front Cell Neurosci 2017; 11:363. [PMID: 29311823 PMCID: PMC5735122 DOI: 10.3389/fncel.2017.00363] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [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: 09/04/2017] [Accepted: 11/03/2017] [Indexed: 01/13/2023] Open
Abstract
Store-operated calcium entry (SOCE) is a Calcium (Ca2+) influx pathway activated by depletion of intracellular stores that occurs in eukaryotic cells. In neurons, the presence and functions of SOCE are still in question. Here, we show evidences for the existence of SOCE in primary mouse cortical neurons. Endoplasmic reticulum (ER)-Ca2+ depletion using thapsigargin (Tg) triggered a maintained cytosolic Ca2+ increase, which rapidly returned to basal level in the presence of the SOCE blockers 2-Aminoethoxydiphenyl borate (2-APB) and YM-58483. Neural SOCE is also engaged by activation of metabotropic glutamate receptors (mGluRs) with (S)-3,5-dihydroxyphenylglycine (DHPG) (agonist of group I mGluRs), being an essential mechanism to maintain the mGluR-driven Ca2+ signal. Activation of group I of mGluRs triggers long-term depression (LTD) in many brain regions, but the underlying mechanism and, specifically, the necessity of Ca2+ increase in the postsynaptic neuron is controversial. In primary cortical neurons, we now show that the inhibition of Ca2+ influx through SOCE impaired DHPG-LTD, pointing out a key function of calcium and SOCE in synaptic plasticity.
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Affiliation(s)
- Paloma González-Sánchez
- Department of Molecular Biology, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain.,Instituto de Investigación Sanitaria Fundación Jiménez Díaz (IIS-FJD), Madrid, Spain
| | - Araceli Del Arco
- Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain.,Instituto de Investigación Sanitaria Fundación Jiménez Díaz (IIS-FJD), Madrid, Spain.,Facultad de Ciencias Ambientales y Bioquímica, Universidad de Castilla la Mancha, Toledo, Spain
| | - José A Esteban
- Department of Molecular Neurobiology, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain
| | - Jorgina Satrústegui
- Department of Molecular Biology, Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas-Universidad Autónoma de Madrid (CSIC-UAM), Madrid, Spain.,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain.,Instituto de Investigación Sanitaria Fundación Jiménez Díaz (IIS-FJD), Madrid, Spain
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18
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Lissek T, Adams M, Adelman J, Ahissar E, Akaaboune M, Akil H, al’Absi M, Arain F, Arango-Lasprilla JC, Atasoy D, Avila J, Badawi A, Bading H, Baig AM, Baleriola J, Belmonte C, Bertocchi I, Betz H, Blakemore C, Blanke O, Boehm-Sturm P, Bonhoeffer T, Bonifazi P, Brose N, Campolongo P, Celikel T, Chang CC, Chang TY, Citri A, Cline HT, Cortes JM, Cullen K, Dean K, Delgado-Garcia JM, Desroches M, Disterhoft JF, Dowling JE, Draguhn A, El-Khamisy SF, El Manira A, Enam SA, Encinas JM, Erramuzpe A, Esteban JA, Fariñas I, Fischer E, Fukunaga I, Gabilondo I, Ganten D, Gidon A, Gomez-Esteban JC, Greengard P, Grinevich V, Gruart A, Guillemin R, Hariri AR, Hassan B, Häusser M, Hayashi Y, Hussain NK, Jabbar AA, Jaber M, Jahn R, Janahi EM, Kabbaj M, Kettenmann H, Kindt M, Knafo S, Köhr G, Komai S, Krugers H, Kuhn B, Ghazal NL, Larkum ME, London M, Lutz B, Matute C, Martinez-Millan L, Maroun M, McGaugh J, Moustafa AA, Nasim A, Nave KA, Neher E, Nikolich K, Outeiro T, Palmer LM, Penagarikano O, Perez-Otano I, Pfaff DW, Poucet B, Rahman AU, Ramos-Cabrer P, Rashidy-Pour A, Roberts RJ, Rodrigues S, Sanes JR, Schaefer AT, Segal M, Segev I, Shafqat S, Siddiqui NA, Soreq H, Soriano-García E, Spanagel R, Sprengel R, Stuart G, Südhof TC, Tønnesen J, Treviño M, Uthman BM, Venter JC, Verkhratsky A, Weiss C, Wiesel TN, Yaksi E, Yizhar O, Young LJ, Young P, Zawia NH, Zugaza JL, Hasan MT. Building Bridges through Science. Neuron 2017; 96:730-735. [DOI: 10.1016/j.neuron.2017.09.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2017] [Revised: 09/16/2017] [Accepted: 09/19/2017] [Indexed: 10/18/2022]
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19
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Salas IH, Callaerts-Vegh Z, Arranz AM, Guix FX, D'Hooge R, Esteban JA, De Strooper B, Dotti CG. Correction: Tetraspanin 6: A novel regulator of hippocampal synaptic transmission and long term plasticity. PLoS One 2017; 12:e0187179. [PMID: 29065158 PMCID: PMC5655380 DOI: 10.1371/journal.pone.0187179] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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20
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Salas IH, Callaerts-Vegh Z, Arranz AM, Guix FX, D'Hooge R, Esteban JA, De Strooper B, Dotti CG. Correction: Tetraspanin 6: A novel regulator of hippocampal synaptic transmission and long term plasticity. PLoS One 2017; 12:e0178016. [PMID: 28686613 PMCID: PMC5501433 DOI: 10.1371/journal.pone.0178016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
[This corrects the article DOI: 10.1371/journal.pone.0171968.].
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21
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Salas IH, Callaerts-Vegh Z, Arranz AM, Guix FX, D’Hooge R, Esteban JA, De Strooper B, Dotti CG. Tetraspanin 6: A novel regulator of hippocampal synaptic transmission and long term plasticity. PLoS One 2017; 12:e0171968. [PMID: 28207852 PMCID: PMC5312877 DOI: 10.1371/journal.pone.0171968] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Accepted: 01/27/2017] [Indexed: 11/19/2022] Open
Abstract
Tetraspanins (Tspan) are transmembrane proteins with important scaffold and signalling functions. Deletions of Tetraspanin 6 (Tspan6) gene, a member of the tetraspanin family, have been reported in patients with Epilepsy Female-restricted with Mental Retardation (EFMR). Interestingly, mutations in Tspan7, highly homologous to Tspan6, are associated with X-linked intellectual disability, suggesting that these two proteins are important for cognition. Considering recent evidences showing that Tspan7 plays a key role in synapse development and AMPAR trafficking, we initiated the study of Tspan6 in synaptic function using a Tspan6 knock out mouse model. Here we report that hippocampal field recordings from Tspan6 knock out mice show an enhanced basal synaptic transmission and impaired long term potentiation (LTP). A normal paired-pulse facilitation response suggests that Tspan6 affects the properties of the postsynaptic rather than the presynaptic terminal. However, no changes in spine morphology or postsynaptic markers could be detected in Tspan6 KO mice compared with wild types. In addition, Tspan6 KO mice show normal locomotor behaviour and no defects in hippocampus-dependent memory tests.
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Affiliation(s)
- Isabel H. Salas
- VIB Center for Biology of Disease – VIB, Leuven, Belgium
- Center of Human Genetics and Leuven Institute for Neurodegenerative Diseases (LIND), KU Leuven, Leuven, Gasthuisberg O&N4, Belgium
| | | | - Amaia M. Arranz
- VIB Center for Biology of Disease – VIB, Leuven, Belgium
- Center of Human Genetics and Leuven Institute for Neurodegenerative Diseases (LIND), KU Leuven, Leuven, Gasthuisberg O&N4, Belgium
| | - Francesc X. Guix
- VIB Center for Biology of Disease – VIB, Leuven, Belgium
- Center of Human Genetics and Leuven Institute for Neurodegenerative Diseases (LIND), KU Leuven, Leuven, Gasthuisberg O&N4, Belgium
| | - Rudi D’Hooge
- Laboratory of Biological Psychology, KU Leuven, Leuven, Belgium
| | - José A. Esteban
- Centro de Biologıa Molecular ‘Severo Ochoa’ (CSIC/UAM), Madrid, Spain
| | - Bart De Strooper
- VIB Center for Biology of Disease – VIB, Leuven, Belgium
- Center of Human Genetics and Leuven Institute for Neurodegenerative Diseases (LIND), KU Leuven, Leuven, Gasthuisberg O&N4, Belgium
- * E-mail: (CGD); (BDS)
| | - Carlos G. Dotti
- Centro de Biologıa Molecular ‘Severo Ochoa’ (CSIC/UAM), Madrid, Spain
- * E-mail: (CGD); (BDS)
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22
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Briz CG, Navarrete M, Esteban JA, Nieto M. In Utero Electroporation Approaches to Study the Excitability of Neuronal Subpopulations and Single-cell Connectivity. J Vis Exp 2017. [PMID: 28287556 DOI: 10.3791/55139] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
The nervous system is composed of an enormous range of distinct neuronal types. These neuronal subpopulations are characterized by, among other features, their distinct dendritic morphologies, their specific patterns of axonal connectivity, and their selective firing responses. The molecular and cellular mechanisms responsible for these aspects of differentiation during development are still poorly understood. Here, we describe combined protocols for labeling and characterizing the structural connectivity and excitability of cortical neurons. Modification of the in utero electroporation (IUE) protocol allows the labeling of a sparse population of neurons. This, in turn, enables the identification and tracking of the dendrites and axons of individual neurons, the precise characterization of the laminar location of axonal projections, and morphometric analysis. IUE can also be used to investigate changes in the excitability of wild-type (WT) or genetically modified neurons by combining it with whole-cell recording from acute slices of electroporated brains. These two techniques contribute to a better understanding of the coupling of structural and functional connectivity and of the molecular mechanisms controlling neuronal diversity during development. These developmental processes have important implications on axonal wiring, the functional diversity of neurons, and the biology of cognitive disorders.
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Affiliation(s)
- Carlos G Briz
- Department for Molecular and Cellular Biology, Centro Nacional de Biotecnología (CNB-CSIC)
| | - Marta Navarrete
- Molecular Neurobiology Department, Centro de Biología Molecular "Severo Ochoa", Consejo Superior de Investigaciones Científicas (CSIC-UAM)
| | - José A Esteban
- Molecular Neurobiology Department, Centro de Biología Molecular "Severo Ochoa", Consejo Superior de Investigaciones Científicas (CSIC-UAM)
| | - Marta Nieto
- Department for Molecular and Cellular Biology, Centro Nacional de Biotecnología (CNB-CSIC);
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23
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Knafo S, Esteban JA. PTEN: Local and Global Modulation of Neuronal Function in Health and Disease. Trends Neurosci 2017; 40:83-91. [PMID: 28081942 DOI: 10.1016/j.tins.2016.11.008] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [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: 10/15/2016] [Revised: 11/23/2016] [Accepted: 11/29/2016] [Indexed: 11/27/2022]
Abstract
Phosphatase and tensin homolog deleted on chromosome ten (PTEN) was recently revealed to be a synaptic player during plasticity events in addition to its well-established role as a general controlling factor in cell proliferation and neuronal growth during development. Alterations of these direct actions of PTEN at synapses may lead to synaptic dysfunction with behavioral and cognitive consequences. A recent paradigmatic example of this situation, Alzheimer's disease (AD), is associated with excessive recruitment of PTEN into synapses leading to pathological synaptic depression. By contrast, some forms of autism are characterized by failure to weaken synaptic connections, which may be related to insufficient PTEN signaling. Understanding the modulation of synaptic function by PTEN in these pathologies may contribute to the development of new therapies.
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Affiliation(s)
- Shira Knafo
- Biophysics Institute, CSIC-UPV/EHU, Campus Universidad del País Vasco, Barrio Sarriena s/n, 48940 Leioa, Spain; Ikerbasque, Basque Foundation for Science, Bilbao, Basque Country, Spain.
| | - José A Esteban
- Department of Molecular Neurobiology, Centro de Biología Molecular 'Severo Ochoa', Consejo Superior de Investigaciones Científicas (CSIC)/Universidad Autónoma de Madrid, 28049 Madrid, Spain.
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24
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Fernández-Monreal M, Sánchez-Castillo C, Esteban JA. APPL1 gates long-term potentiation through its plekstrin homology domain. J Cell Sci 2016; 129:2793-803. [PMID: 27257087 DOI: 10.1242/jcs.183475] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [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: 11/16/2015] [Accepted: 05/31/2016] [Indexed: 01/02/2023] Open
Abstract
Hippocampal synaptic plasticity involves both membrane trafficking events and intracellular signaling, but how these are coordinated is far from clear. The endosomal transport of glutamate receptors in and out of the postsynaptic membrane responds to multiple signaling cascades triggered by synaptic activity. In this work, we have identified adaptor protein containing a plekstrin homology domain, phosphotyrosine-binding domain and leucine zipper motif 1 (APPL1) as a crucial element linking trafficking and signaling during synaptic plasticity. We show that APPL1 knockdown specifically impairs PI3K-dependent forms of synaptic plasticity, such as long-term potentiation (LTP) and metabotropic-glutamate-receptor-dependent long-term depression (mGluR-LTD). Indeed, we demonstrate that APPL1 is required for the activation of the phosphatidylinositol triphosphate (PIP3) pathway in response to LTP induction. This requirement can be bypassed by membrane localization of PI3K and is related to phosphoinositide binding. Interestingly, inhibitors of PDK1 (also known as PDPK1) and Akt have no effect on LTP expression. Therefore, we conclude that APPL1 gates PI3K activation at the plasma membrane upon LTP induction, which is then relayed by downstream PIP3 effectors that are different from PDK1 and Akt.
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Affiliation(s)
- Mónica Fernández-Monreal
- Centro de Biología Molecular 'Severo Ochoa', Consejo Superior de Investigaciones Científicas - Universidad Autónoma de Madrid (CSIC-UAM), Madrid 28049, Spain
| | - Carla Sánchez-Castillo
- Centro de Biología Molecular 'Severo Ochoa', Consejo Superior de Investigaciones Científicas - Universidad Autónoma de Madrid (CSIC-UAM), Madrid 28049, Spain
| | - José A Esteban
- Centro de Biología Molecular 'Severo Ochoa', Consejo Superior de Investigaciones Científicas - Universidad Autónoma de Madrid (CSIC-UAM), Madrid 28049, Spain
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25
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Sanz-García A, Knafo S, Pereda-Pérez I, Esteban JA, Venero C, Armario A. Administration of the TrkB receptor agonist 7,8-dihydroxyflavone prevents traumatic stress-induced spatial memory deficits and changes in synaptic plasticity. Hippocampus 2016; 26:1179-88. [PMID: 27068341 DOI: 10.1002/hipo.22599] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/07/2016] [Indexed: 01/18/2023]
Abstract
Post-traumatic stress disorder (PTSD) occurs after exposure to traumatic situations and it is characterized by cognitive deficits that include impaired explicit memory. The neurobiological bases of such PTSD-associated memory alterations are yet to be elucidated and no satisfactory treatment for them exists. To address this issue, we first studied whether a single exposure of young adult rats (60 days) to immobilization on boards (IMO), a putative model of PTSD, produces long-term behavioral effects (2-8 days) similar to those found in PTSD patients. Subsequently, we investigated whether the administration of the TrkB agonist 7,8-dihydroxyflavone (DHF) 8 h after stress (therapeutic window) ameliorated the PTSD-like effect of IMO and the associated changes in synaptic plasticity. A single IMO exposure induced a spatial memory impairment similar to that found in other animal models of PTSD or in PTSD patients. IMO also increased spine density and long-term potentiation (LTP) in the CA3-CA1 pathway. Significantly, DHF reverted both spatial memory impairment and the increase in LTP, while it produced no effect in the controls. These data provide novel insights into the possible neurobiological substrate for explicit memory impairment in PTSD patients, supporting the idea that the activation of the BDNF/TrkB pathway fulfils a protective role after severe stress. Administration of DHF in the aftermath of a traumatic experience might be relevant to prevent its long-term consequences. © 2016 Wiley Periodicals, Inc.
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Affiliation(s)
- Ancor Sanz-García
- Unitat De Fisiologia Animal (Facultat De Biociències), Universitat Autònoma De Barcelona, 08193 Bellaterra, Barcelona, Spain.,Institut De Neurociències, Universitat Autonòma De Barcelona, 08193 Bellaterra, Barcelona, Spain.,Red De Trastornos Adictivos (RTA), Instituto De Salud Carlos III, Madrid, Spain
| | - Shira Knafo
- IkerBasque Research Professor, Biophysics Unit (Unidad De Biofísica CSIC-UPV/EHU), Leioa, Bizkaia, Spain
| | | | - José A Esteban
- Deparment of Molecular Neurobiology, Centro De Biología Molecular "Severo Ochoa," Consejo Superior De Investigaciones Científicas (CSIC)/Universidad Autónoma De Madrid, Madrid, Spain
| | - César Venero
- Department of Psychobiology, Universidad Nacional De Educación a Distancia, Juan Del Rosal 10, Madrid, 28040, Spain
| | - Antonio Armario
- Unitat De Fisiologia Animal (Facultat De Biociències), Universitat Autònoma De Barcelona, 08193 Bellaterra, Barcelona, Spain.,Institut De Neurociències, Universitat Autonòma De Barcelona, 08193 Bellaterra, Barcelona, Spain.,Red De Trastornos Adictivos (RTA), Instituto De Salud Carlos III, Madrid, Spain
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26
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Rodríguez-Tornos FM, Briz CG, Weiss LA, Sebastián-Serrano A, Ares S, Navarrete M, Frangeul L, Galazo M, Jabaudon D, Esteban JA, Nieto M. Cux1 Enables Interhemispheric Connections of Layer II/III Neurons by Regulating Kv1-Dependent Firing. Neuron 2016; 89:494-506. [PMID: 26804994 DOI: 10.1016/j.neuron.2015.12.020] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2015] [Revised: 04/23/2015] [Accepted: 12/01/2015] [Indexed: 01/19/2023]
Abstract
Neuronal subtype-specific transcription factors (TFs) instruct key features of neuronal function and connectivity. Activity-dependent mechanisms also contribute to wiring and circuit assembly, but whether and how they relate to TF-directed neuronal differentiation is poorly investigated. Here we demonstrate that the TF Cux1 controls the formation of the layer II/III corpus callosum (CC) projections through the developmental transcriptional regulation of Kv1 voltage-dependent potassium channels and the resulting postnatal switch to a Kv1-dependent firing mode. Loss of Cux1 function led to a decrease in the expression of Kv1 transcripts, aberrant firing responses, and selective loss of CC contralateral innervation. Firing and innervation were rescued by re-expression of Kv1 or postnatal reactivation of Cux1. Knocking down Kv1 mimicked Cux1-mediated CC axonal loss. These findings reveal that activity-dependent processes are central bona fide components of neuronal TF-differentiation programs and establish the importance of intrinsic firing modes in circuit assembly within the neocortex.
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Affiliation(s)
| | - Carlos G Briz
- Centro Nacional de Biotecnología (CNB-CSIC), Campus de Cantoblanco, Darwin 3, 28049 Madrid, Spain
| | - Linnea A Weiss
- Centro Nacional de Biotecnología (CNB-CSIC), Campus de Cantoblanco, Darwin 3, 28049 Madrid, Spain
| | - Alvaro Sebastián-Serrano
- Centro Nacional de Biotecnología (CNB-CSIC), Campus de Cantoblanco, Darwin 3, 28049 Madrid, Spain
| | - Saúl Ares
- Centro Nacional de Biotecnología (CNB-CSIC), Campus de Cantoblanco, Darwin 3, 28049 Madrid, Spain; Departamento de Matemáticas Universidad Carlos III de Madrid, Grupo Interdisciplinar de Sistemas Complejos (GISC), 28911 Leganés, Madrid, Spain
| | - Marta Navarrete
- Centro de Biología Molecular "Severo Ochoa," Consejo Superior de Investigaciones Científicas (CSIC-UAM), 28049 Madrid, Spain
| | - Laura Frangeul
- Department of Basic Neurosciences, University of Geneva, 1211 Geneva 4, Switzerland
| | - Maria Galazo
- HSCRB Harvard University, Cambridge, MA 02138, USA
| | - Denis Jabaudon
- Department of Basic Neurosciences, University of Geneva, 1211 Geneva 4, Switzerland
| | - José A Esteban
- Centro de Biología Molecular "Severo Ochoa," Consejo Superior de Investigaciones Científicas (CSIC-UAM), 28049 Madrid, Spain
| | - Marta Nieto
- Centro Nacional de Biotecnología (CNB-CSIC), Campus de Cantoblanco, Darwin 3, 28049 Madrid, Spain.
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27
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Knafo S, Sánchez-Puelles C, Palomer E, Delgado I, Draffin JE, Mingo J, Wahle T, Kaleka K, Mou L, Pereda-Perez I, Klosi E, Faber EB, Chapman HM, Lozano-Montes L, Ortega-Molina A, Ordóñez-Gutiérrez L, Wandosell F, Viña J, Dotti CG, Hall RA, Pulido R, Gerges NZ, Chan AM, Spaller MR, Serrano M, Venero C, Esteban JA. PTEN recruitment controls synaptic and cognitive function in Alzheimer's models. Nat Neurosci 2016; 19:443-53. [DOI: 10.1038/nn.4225] [Citation(s) in RCA: 96] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 12/03/2015] [Indexed: 11/09/2022]
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Brachet A, Norwood S, Brouwers JF, Palomer E, Helms JB, Dotti CG, Esteban JA. LTP-triggered cholesterol redistribution activates Cdc42 and drives AMPA receptor synaptic delivery. J Gen Physiol 2015. [DOI: 10.1085/jgp.1454oia11] [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: 11/20/2022] Open
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Mignogna ML, Giannandrea M, Gurgone A, Fanelli F, Raimondi F, Mapelli L, Bassani S, Fang H, Van Anken E, Alessio M, Passafaro M, Gatti S, Esteban JA, Huganir R, D'Adamo P. The intellectual disability protein RAB39B selectively regulates GluA2 trafficking to determine synaptic AMPAR composition. Nat Commun 2015; 6:6504. [PMID: 25784538 PMCID: PMC4383008 DOI: 10.1038/ncomms7504] [Citation(s) in RCA: 75] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2014] [Accepted: 02/03/2015] [Indexed: 01/31/2023] Open
Abstract
RAB39B is a member of the RAB family of small GTPases that controls intracellular vesicular trafficking in a compartment-specific manner. Mutations in the RAB39B gene cause intellectual disability comorbid with autism spectrum disorder and epilepsy, but the impact of RAB39B loss of function on synaptic activity is largely unexplained. Here we show that protein interacting with C-kinase 1 (PICK1) is a downstream effector of GTP-bound RAB39B and that RAB39B-PICK1 controls trafficking from the endoplasmic reticulum to the Golgi and, hence, surface expression of GluA2, a subunit of alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptors (AMPARs). The role of AMPARs in synaptic transmission varies depending on the combination of subunits (GluA1, GluA2 and GluA3) they incorporate. RAB39B downregulation in mouse hippocampal neurons skews AMPAR composition towards non GluA2-containing Ca2+-permeable forms and thereby alters synaptic activity, specifically in hippocampal neurons. We posit that the resulting alteration in synaptic function underlies cognitive dysfunction in RAB39B-related disorders. Mutations in the RAB39B gene, which encodes a protein involved in vesicular trafficking, are associated with intellectual disability, but the impact of RAB39B loss of function on synaptic activity is not known. Here the authors show that RAB39B interacts with PICK1, and that this interaction is critical for the translocation of AMPA receptor subunits into the Golgi.
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Affiliation(s)
- Maria Lidia Mignogna
- 1] Dulbecco Telethon Institute at IRCCS San Raffaele Scientific Institute, Division of Neuroscience, 20132 Milan, Italy [2] F. Hoffmann-La Roche AG, pRED Pharma Research &Early Development, DTA Neuroscience, CH4070 Basel, Switzerland [3] Vita-Salute San Raffaele University, 20132 Milan, Italy
| | - Maila Giannandrea
- 1] Dulbecco Telethon Institute at IRCCS San Raffaele Scientific Institute, Division of Neuroscience, 20132 Milan, Italy [2] F. Hoffmann-La Roche AG, pRED Pharma Research &Early Development, DTA Neuroscience, CH4070 Basel, Switzerland
| | - Antonia Gurgone
- 1] Dulbecco Telethon Institute at IRCCS San Raffaele Scientific Institute, Division of Neuroscience, 20132 Milan, Italy [2] Vita-Salute San Raffaele University, 20132 Milan, Italy
| | - Francesca Fanelli
- Department of Life Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Francesco Raimondi
- Department of Life Sciences, University of Modena and Reggio Emilia, 41125 Modena, Italy
| | - Lisa Mapelli
- CNR Institute of Neuroscience, Department of BIOMETRA, University of Milan, 20129 Milan, Italy
| | - Silvia Bassani
- CNR Institute of Neuroscience, Department of BIOMETRA, University of Milan, 20129 Milan, Italy
| | - Huaqiang Fang
- Department of Neuroscience and Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - Eelco Van Anken
- IRCCS San Raffaele Scientific Institute, Division of Genetics and Cell Biology, 20132 Milan, Italy
| | - Massimo Alessio
- IRCCS San Raffaele Scientific Institute, Division of Genetics and Cell Biology, 20132 Milan, Italy
| | - Maria Passafaro
- CNR Institute of Neuroscience, Department of BIOMETRA, University of Milan, 20129 Milan, Italy
| | - Silvia Gatti
- F. Hoffmann-La Roche AG, pRED Pharma Research &Early Development, DTA Neuroscience, CH4070 Basel, Switzerland
| | - José A Esteban
- Centro de Biología Molecular Severo Ochoa, Consejo Superior de Investigaciones Científicas/Universidad Autónoma de Madrid, Madrid 28049, Spain
| | - Richard Huganir
- Department of Neuroscience and Howard Hughes Medical Institute, Johns Hopkins University School of Medicine, Baltimore, Maryland 21205, USA
| | - Patrizia D'Adamo
- Dulbecco Telethon Institute at IRCCS San Raffaele Scientific Institute, Division of Neuroscience, 20132 Milan, Italy
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Brachet A, Norwood S, Brouwers JF, Palomer E, Helms JB, Dotti CG, Esteban JA. LTP-triggered cholesterol redistribution activates Cdc42 and drives AMPA receptor synaptic delivery. ACTA ACUST UNITED AC 2015; 208:791-806. [PMID: 25753037 PMCID: PMC4362467 DOI: 10.1083/jcb.201407122] [Citation(s) in RCA: 49] [Impact Index Per Article: 5.4] [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: 11/22/2022]
Abstract
Cholesterol acts as a sensor of NMDA receptor activation and as a trigger of downstream signaling by engaging small GTPase activation and AMPA receptor synaptic delivery during long-term potentiation. Neurotransmitter receptor trafficking during synaptic plasticity requires the concerted action of multiple signaling pathways and the protein transport machinery. However, little is known about the contribution of lipid metabolism during these processes. In this paper, we addressed the question of the role of cholesterol in synaptic changes during long-term potentiation (LTP). We found that N-methyl-d-aspartate–type glutamate receptor (NMDAR) activation during LTP induction leads to a rapid and sustained loss or redistribution of intracellular cholesterol in the neuron. A reduction in cholesterol, in turn, leads to the activation of Cdc42 and the mobilization of GluA1-containing α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid–type glutamate receptors (AMPARs) from Rab11-recycling endosomes into the synaptic membrane, leading to synaptic potentiation. This process is accompanied by an increase of NMDAR function and an enhancement of LTP. These results imply that cholesterol acts as a sensor of NMDAR activation and as a trigger of downstream signaling to engage small GTPase (guanosine triphosphatase) activation and AMPAR synaptic delivery during LTP.
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Affiliation(s)
- Anna Brachet
- Departamento de Neurobiología, Centro de Biología Molecular "Severo Ochoa," Consejo Superior de Investigaciones Cientificas-Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Stephanie Norwood
- Departamento de Neurobiología, Centro de Biología Molecular "Severo Ochoa," Consejo Superior de Investigaciones Cientificas-Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - Jos F Brouwers
- Department of Biochemistry and Cell Biology, Faculty of Veterinary Medicine, Utrecht University, 3508 Utrecht, Netherlands
| | - Ernest Palomer
- Departamento de Neurobiología, Centro de Biología Molecular "Severo Ochoa," Consejo Superior de Investigaciones Cientificas-Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - J Bernd Helms
- Department of Biochemistry and Cell Biology, Faculty of Veterinary Medicine, Utrecht University, 3508 Utrecht, Netherlands
| | - Carlos G Dotti
- Departamento de Neurobiología, Centro de Biología Molecular "Severo Ochoa," Consejo Superior de Investigaciones Cientificas-Universidad Autónoma de Madrid, 28049 Madrid, Spain
| | - José A Esteban
- Departamento de Neurobiología, Centro de Biología Molecular "Severo Ochoa," Consejo Superior de Investigaciones Cientificas-Universidad Autónoma de Madrid, 28049 Madrid, Spain
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Arendt KL, Benoist M, Lario A, Draffin JE, Muñoz M, Esteban JA. PTEN counteracts PIP3 upregulation in spines during NMDA-receptor-dependent long-term depression. J Cell Sci 2014; 127:5253-60. [PMID: 25335889 DOI: 10.1242/jcs.156554] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Phosphoinositide 3-kinase (PI3K) and PTEN have been shown to participate in synaptic plasticity during long-term potentiation (LTP) and long-term depression (LTD), respectively. Nevertheless, the dynamics of phosphatidylinositol-(3,4,5)-trisphosphate (PIP3) and the regulation of its synthesis and degradation at synaptic compartments is far from clear. Here, we have used fluorescence resonance energy transfer (FRET) imaging to monitor changes in PIP3 levels in dendritic spines from CA1 hippocampal neurons under basal conditions and upon induction of NMDA receptor (NMDAR)-dependent LTD and LTP. We found that PIP3 undergoes constant turnover in dendritic spines. Contrary to expectations, both LTD and LTP induction trigger an increase in PIP3 synthesis, which requires NMDARs and PI3K activity. Using biochemical methods, the upregulation of PIP3 levels during LTP was estimated to be twofold. However, in the case of LTD, PTEN activity counteracts the increase in PIP3 synthesis, resulting in no net change in PIP3 levels. Therefore, both LTP and LTD signaling converge towards PIP3 upregulation, but PTEN acts as an LTD-selective switch that determines the outcome of PIP3 accumulation.
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Affiliation(s)
- Kristin L Arendt
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA
| | - Marion Benoist
- Centro de Biología Molecular "Severo Ochoa", Consejo Superior de Investigaciones Científicas (CSIC)/Universidad Autónoma de Madrid (UAM), Madrid 28049, Spain
| | - Argentina Lario
- Centro de Biología Molecular "Severo Ochoa", Consejo Superior de Investigaciones Científicas (CSIC)/Universidad Autónoma de Madrid (UAM), Madrid 28049, Spain
| | - Jonathan E Draffin
- Centro de Biología Molecular "Severo Ochoa", Consejo Superior de Investigaciones Científicas (CSIC)/Universidad Autónoma de Madrid (UAM), Madrid 28049, Spain
| | - María Muñoz
- Centro de Biología Molecular "Severo Ochoa", Consejo Superior de Investigaciones Científicas (CSIC)/Universidad Autónoma de Madrid (UAM), Madrid 28049, Spain
| | - José A Esteban
- Centro de Biología Molecular "Severo Ochoa", Consejo Superior de Investigaciones Científicas (CSIC)/Universidad Autónoma de Madrid (UAM), Madrid 28049, Spain
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Knafo S, Esteban JA. Common pathways for growth and for plasticity. Curr Opin Neurobiol 2012; 22:405-11. [DOI: 10.1016/j.conb.2012.02.008] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2012] [Revised: 02/13/2012] [Accepted: 02/15/2012] [Indexed: 11/24/2022]
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Knafo S, Venero C, Sánchez-Puelles C, Pereda-Peréz I, Franco A, Sandi C, Suárez LM, Solís JM, Alonso-Nanclares L, Martín ED, Merino-Serrais P, Borcel E, Li S, Chen Y, Gonzalez-Soriano J, Berezin V, Bock E, DeFelipe J, Esteban JA. Facilitation of AMPA receptor synaptic delivery as a molecular mechanism for cognitive enhancement. PLoS Biol 2012; 10:e1001262. [PMID: 22363206 PMCID: PMC3283560 DOI: 10.1371/journal.pbio.1001262] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [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: 02/03/2011] [Accepted: 01/05/2012] [Indexed: 11/19/2022] Open
Abstract
Cell adhesion molecules and downstream growth factor-dependent signaling are critical for brain development and synaptic plasticity, and they have been linked to cognitive function in adult animals. We have previously developed a mimetic peptide (FGL) from the neural cell adhesion molecule (NCAM) that enhances spatial learning and memory in rats. We have now investigated the cellular and molecular basis of this cognitive enhancement, using biochemical, morphological, electrophysiological, and behavioral analyses. We have found that FGL triggers a long-lasting enhancement of synaptic transmission in hippocampal CA1 neurons. This effect is mediated by a facilitated synaptic delivery of AMPA receptors, which is accompanied by enhanced NMDA receptor-dependent long-term potentiation (LTP). Both LTP and cognitive enhancement are mediated by an initial PKC activation, which is followed by persistent CaMKII activation. These results provide a mechanistic link between facilitation of AMPA receptor synaptic delivery and improved hippocampal-dependent learning, induced by a pharmacological cognitive enhancer.
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Affiliation(s)
- Shira Knafo
- Centro de Biología Molecular “Severo Ochoa,” Consejo Superior de Investigaciones Científicas (CSIC)/Universidad Autónoma de Madrid, Madrid, Spain
- Instituto Cajal (CSIC), Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, and Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
- * E-mail: (JAE), (SK); (CV)
| | - César Venero
- Department of Psychobiology, Universidad Nacional de Educación a Distancia, Madrid, Spain
- * E-mail: (JAE), (SK); (CV)
| | - Cristina Sánchez-Puelles
- Centro de Biología Molecular “Severo Ochoa,” Consejo Superior de Investigaciones Científicas (CSIC)/Universidad Autónoma de Madrid, Madrid, Spain
| | | | - Ana Franco
- Centro Nacional Biotecnología (CSIC), Universidad Autónoma de Madrid, Madrid, Spain
| | - Carmen Sandi
- Brain Mind Institute, Ecole Polytechnique Federale de Lausanne (EPFL), Switzerland
| | - Luz M. Suárez
- Instituto Cajal (CSIC), Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, and Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
- Servicio de Neurobiología-Investigación, Hospital Ramón y Cajal, IRYCIS, Madrid, Spain
| | - José M. Solís
- Servicio de Neurobiología-Investigación, Hospital Ramón y Cajal, IRYCIS, Madrid, Spain
| | - Lidia Alonso-Nanclares
- Instituto Cajal (CSIC), Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, and Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Eduardo D. Martín
- Departamento de Ciencias Médicas, Universidad de Castilla-la Mancha, Albacete, Spain
| | - Paula Merino-Serrais
- Instituto Cajal (CSIC), Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, and Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - Erika Borcel
- Department of Psychobiology, Universidad Nacional de Educación a Distancia, Madrid, Spain
| | - Shizhong Li
- Protein Laboratory, Department of Neuroscience and Pharmacology, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Yongshuo Chen
- Protein Laboratory, Department of Neuroscience and Pharmacology, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Juncal Gonzalez-Soriano
- Department of Anatomy, Faculty of Veterinary Medicine, Complutense University, Madrid, Spain
| | - Vladimir Berezin
- Protein Laboratory, Department of Neuroscience and Pharmacology, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Elisabeth Bock
- Protein Laboratory, Department of Neuroscience and Pharmacology, Faculty of Health Sciences, University of Copenhagen, Copenhagen, Denmark
| | - Javier DeFelipe
- Instituto Cajal (CSIC), Centro de Tecnología Biomédica, Universidad Politécnica de Madrid, and Centro de Investigación Biomédica en Red sobre Enfermedades Neurodegenerativas (CIBERNED), Madrid, Spain
| | - José A. Esteban
- Centro de Biología Molecular “Severo Ochoa,” Consejo Superior de Investigaciones Científicas (CSIC)/Universidad Autónoma de Madrid, Madrid, Spain
- * E-mail: (JAE), (SK); (CV)
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Franco A, Knafo S, Banon-Rodriguez I, Merino-Serrais P, Fernaud-Espinosa I, Nieto M, Garrido JJ, Esteban JA, Wandosell F, Anton IM. WIP is a negative regulator of neuronal maturation and synaptic activity. ACTA ACUST UNITED AC 2011; 22:1191-202. [PMID: 21810783 DOI: 10.1093/cercor/bhr199] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Wiskott-Aldrich syndrome protein (WASP) -interacting protein (WIP) is an actin-binding protein involved in the regulation of actin polymerization in cells, such as fibroblasts and lymphocytes. Despite its recognized function in non-neuronal cells, the role of WIP in the central nervous system has not been examined previously. We used WIP-deficient mice to examine WIP function both in vivo and in vitro. We report here that WIP(-)(/-) hippocampal neurons exhibit enlargement of somas as well as overgrowth of neuritic and dendritic branches that are more evident in early developmental stages. Dendritic arborization and synaptogenesis, which includes generation of postsynaptic dendritic spines, are actin-dependent processes that occur in parallel at later stages. WIP deficiency also increases the amplitude and frequency of miniature excitatory postsynaptic currents, suggesting that WIP(-)(/-) neurons have more mature synapses than wild-type neurons. These findings reveal WIP as a previously unreported regulator of neuronal maturation and synaptic activity.
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Affiliation(s)
- A Franco
- Centro Nacional de Biotecnología (CNB-CSIC), 28049 Madrid, Spain
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35
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Malinow R, Hayashi Y, Maletic-Savatic M, Zaman SH, Poncer JC, Shi SH, Esteban JA, Osten P, Seidenman K. Introduction of green fluorescent protein (GFP) into hippocampal neurons through viral infection. Cold Spring Harb Protoc 2010; 2010:pdb.prot5406. [PMID: 20360360 DOI: 10.1101/pdb.prot5406] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
Expression of green fluorescent protein (GFP), its more fluorescent mutant forms (e.g., EGFP [enhanced GFP]), or their fusion protein derivatives, affords a number of informative possibilities in cellular neuroscience. EGFP is a soluble protein and appears to be homogeneously distributed within the cytosol of neurons when expressed. Thus, it reveals the structure of the neuron, including the cell body, and axonal and dendritic arbors. It is also sufficiently bright to reveal detailed structures such as axonal boutons and dendritic spines. When expressed as a fusion protein, EGFP can provide information about the distribution characteristics of the proteins within neurons. Furthermore, during single-cell electrophysiological studies, such expression can direct the investigator to record from a cell carrying a foreign gene. In this protocol, we describe the use of the Sindbis pseudovirus expression system to deliver GFP to neurons. Sindbis is a member of the alphaviruses, which are plus-stranded RNA viruses. This protocol uses the DH(26S) strain, which preferentially infects neurons over glia (50:1). Two infection methods are given: one for dissociated hippocampal cultured neurons and one for organotypic hippocampal slices.
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36
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Jurado S, Benoist M, Lario A, Knafo S, Petrok CN, Esteban JA. PTEN is recruited to the postsynaptic terminal for NMDA receptor-dependent long-term depression. EMBO J 2010; 29:2827-40. [PMID: 20628354 DOI: 10.1038/emboj.2010.160] [Citation(s) in RCA: 114] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2009] [Accepted: 06/24/2010] [Indexed: 01/10/2023] Open
Abstract
Phosphatase and tensin homolog deleted on chromosome ten (PTEN) is an important regulator of phosphatidylinositol-(3,4,5,)-trisphosphate signalling, which controls cell growth and differentiation. However, PTEN is also highly expressed in the adult brain, in which it can be found in dendritic spines in hippocampus and other brain regions. Here, we have investigated specific functions of PTEN in the regulation of synaptic function in excitatory hippocampal synapses. We found that NMDA receptor activation triggers a PDZ-dependent association between PTEN and the synaptic scaffolding molecule PSD-95. This association is accompanied by PTEN localization at the postsynaptic density and anchoring within the spine. On the other hand, enhancement of PTEN lipid phosphatase activity is able to drive depression of AMPA receptor-mediated synaptic responses. This activity is specifically required for NMDA receptor-dependent long-term depression (LTD), but not for LTP or metabotropic glutamate receptor-dependent LTD. Therefore, these results reveal PTEN as a regulated signalling molecule at the synapse, which is recruited to the postsynaptic membrane upon NMDA receptor activation, and is required for the modulation of synaptic activity during plasticity.
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Affiliation(s)
- Sandra Jurado
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI, USA
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37
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Arendt KL, Royo M, Fernández-Monreal M, Knafo S, Petrok CN, Martens JR, Esteban JA. PIP3 controls synaptic function by maintaining AMPA receptor clustering at the postsynaptic membrane. Nat Neurosci 2009; 13:36-44. [PMID: 20010819 PMCID: PMC2810846 DOI: 10.1038/nn.2462] [Citation(s) in RCA: 121] [Impact Index Per Article: 8.1] [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: 08/03/2009] [Accepted: 11/04/2009] [Indexed: 12/05/2022]
Abstract
Despite their low abundance, phosphoinositides are critical regulators of intracellular signaling and membrane compartmentalization. However, little is known of phosphoinositide function at the postsynaptic membrane. Here we show that continuous synthesis and availability of phosphatidylinositol-(3,4,5)-trisphosphate (PIP3) at the postsynaptic terminal is necessary for sustaining synaptic function in rat hippocampal neurons. This requirement is specific for synaptic, but not for extrasynaptic, AMPA receptors, nor NMDA receptors. We found that PIP3 down-regulation impairs PSD-95 accumulation in spines. Concomitantly, AMPA receptors become more mobile and migrate from the postsynaptic density towards the perisynaptic membrane within the spine, leading to synaptic depression. Interestingly, these effects are only revealed after prolonged inhibition of PIP3 synthesis or by direct quenching of this phosphoinositide at the postsynaptic cell. Therefore, we conclude that a slow, but constant turnover of PIP3 at synapses is required for maintaining AMPA receptor clustering and synaptic strength under basal conditions.
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Affiliation(s)
- Kristin L Arendt
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, Michigan, USA
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38
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Correia SS, Bassani S, Brown TC, Lisé MF, Backos DS, El-Husseini A, Passafaro M, Esteban JA. Motor protein–dependent transport of AMPA receptors into spines during long-term potentiation. Nat Neurosci 2008; 11:457-66. [DOI: 10.1038/nn2063] [Citation(s) in RCA: 208] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2007] [Accepted: 02/01/2008] [Indexed: 12/12/2022]
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Abstract
AMPA-type glutamate receptors are one of the most dynamic components of excitatory synapses. Their regulated addition and removal from synapses leads to long-lasting forms of synaptic plasticity, known as long-term potentiation (LTP) and long-term depression (LTD). In addition, AMPA receptors reach their synaptic targets after a complicated journey involving multiple transport steps through different membrane compartments. This review summarizes our current knowledge of the trafficking pathways of AMPARs and their relation to synaptic function and plasticity.
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Affiliation(s)
- J A Esteban
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI, USA.
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40
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Brown TC, Correia SS, Petrok CN, Esteban JA. Functional compartmentalization of endosomal trafficking for the synaptic delivery of AMPA receptors during long-term potentiation. J Neurosci 2007; 27:13311-5. [PMID: 18045925 PMCID: PMC6673392 DOI: 10.1523/jneurosci.4258-07.2007] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.4] [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: 09/17/2007] [Revised: 10/11/2007] [Accepted: 10/12/2007] [Indexed: 11/21/2022] Open
Abstract
Endosomal membrane trafficking in dendritic spines is important for proper synaptic function and plasticity. However, little is known about the molecular identity and functional compartmentalization of the membrane trafficking machinery operating at the postsynaptic terminal. Here we report that the transport of AMPA-type glutamate receptors into synapses occurs in two discrete steps, and we identify the specific endosomal functions that control this process during long-term potentiation. We found that Rab11-dependent endosomes translocate AMPA receptors from the dendritic shaft into spines. Subsequently, an additional endosomal trafficking step, controlled by Rab8, drives receptor insertion into the synaptic membrane. Separate from this receptor delivery route, we show that Rab4 mediates a constitutive endosomal recycling within the spine. This Rab4-dependent cycling is critical for maintaining spine size but does not influence receptor transport. Therefore, our data reveal a highly compartmentalized endosomal network within the spine and identify the molecular components and functional organization of the membrane organelles that mediate AMPA receptor synaptic delivery during plasticity.
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Affiliation(s)
- Tyler C. Brown
- Neuroscience Program and
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, Michigan 48109
| | - Susana S. Correia
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, Michigan 48109
| | - Cortney N. Petrok
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, Michigan 48109
| | - José A. Esteban
- Neuroscience Program and
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, Michigan 48109
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Abstract
AMPA-type glutamate receptors mediate the majority of fast excitatory transmission in the central nervous system. The trafficking of AMPA receptors to and from synapses alters synaptic strength and has been recognized as a central mechanism underlying various forms of synaptic plasticity. Both secretory and endocytic trafficking events seem to be driven by the subunit composition of AMPA receptor tetramers. Moreover, recent work suggests that synapses employ different tetramer combinations in response to altered synaptic input, suggesting the existence of signalling pathways that mediate remodelling of AMPA receptors. These latest developments and recent progress in elucidating the mechanisms that underlie channel assembly and trafficking are the subject of this review.
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Affiliation(s)
- Ingo H Greger
- Neurobiology Division, MRC Laboratory of Molecular Biology, Hills Road, Cambridge CB2 2QH, UK.
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42
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Caldeira MV, Melo CV, Pereira DB, Carvalho R, Correia SS, Backos DS, Carvalho AL, Esteban JA, Duarte CB. Brain-derived neurotrophic factor regulates the expression and synaptic delivery of alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid receptor subunits in hippocampal neurons. J Biol Chem 2007; 282:12619-28. [PMID: 17337442 DOI: 10.1074/jbc.m700607200] [Citation(s) in RCA: 183] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Brain-derived neurotrophic factor (BDNF) plays an important role in synaptic plasticity in the hippocampus, but the mechanisms involved are not fully understood. The neurotrophin couples synaptic activation to changes in gene expression underlying long term potentiation and short term plasticity. Here we show that BDNF acutely up-regulates GluR1, GluR2, and GluR3 alpha-amino-3-hydroxy-5-methyl-4-isoxazole propionic acid (AMPA) receptor subunits in 7-day in vitro cultured hippocampal neurons. The increase in GluR1 and GluR2 protein levels in developing cultures was impaired by K252a, a tropomyosin-related [corrected] kinase (Trk) inhibitor, and by translation (emetine and anisomycin) and transcription (alpha-amanitine and actinomycin D) inhibitors [corrected] The increase in GluR1 and GluR2 protein levels in developing cultures was impaired by K252a, a Trk inhibitor, and by translation (emetine and anisomycin) and transcription (alpha-amanitine and actinomycin D) inhibitors. Accordingly, BDNF increased the mRNA levels for GluR1 and GluR2 subunits. Biotinylation studies showed that stimulation with BDNF for 30 min selectively increased the amount of GluR1 associated with the plasma membrane, and this effect was abrogated by emetine. Under the same conditions, BDNF induced GluR1 phosphorylation on Ser-831 through activation of protein kinase C and Ca(2+)-calmodulin-dependent protein kinase II. Chelation of endogenous extracellular BDNF with TrkB-IgG selectively decreased GluR1 protein levels in 14-day in vitro cultures of hippocampal neurons. Moreover, BDNF promoted synaptic delivery of homomeric GluR1 AMPA receptors in cultured organotypic slices, by a mechanism independent of NMDA receptor activation. Taken together, the results indicate that BDNF up-regulates the protein levels of AMPA receptor subunits in hippocampal neurons and induces the delivery of AMPA receptors to the synapse.
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Affiliation(s)
- Margarida V Caldeira
- Center for Neuroscience and Cell Biology, Department of Zoology, University of Coimbra, 3004-517 Coimbra, Portugal
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Abstract
Repeated exposure to psychostimulant drugs produces long-lasting changes in dendritic structure, presumably reflecting a reorganization in patterns of synaptic connectivity, in brain regions that mediate the psychomotor activating and incentive motivational effects of these drugs, including the nucleus accumbens and prefrontal cortex. However, repeated exposure to psychostimulant drugs also facilitates a transition in the control of some behaviors from action-outcome associations to behavior controlled by stimulus-response (S-R) habits. This latter effect is thought to be due to increasing engagement and control over behavior by the dorsolateral (but not dorsomedial) striatum. We hypothesized therefore that repeated exposure to methamphetamine would differentially alter the density of dendritic spines on medium spiny neurons (MSNs) in the dorsolateral vs. dorsomedial striatum. Rats were treated with repeated injections of methamphetamine, and 3 months later dendrites were visualized using Sindbis virus-mediated green fluorescent protein (GFP) expression in vivo. We report that prior exposure to methamphetamine produced a significant increase in mushroom and thin spines on MSNs in the dorsolateral striatum, but a significant decrease in mushroom spines in the dorsomedial striatum. This may be due to changes in the glutamatergic innervation of these two subregions of the dorsal striatum. Thus, we speculate that exposure to psychostimulant drugs may facilitate the development of S-R habits because this reorganizes patterns of synaptic connectivity in the dorsal striatum in a way that increases control over behavior by the dorsolateral striatum.
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Affiliation(s)
- Jakub P Jedynak
- Neuroscience Program, The University of Michigan, Ann Arbor, MI, USA
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Gomes AR, Correia SS, Esteban JA, Duarte CB, Carvalho AL. PKC Anchoring to GluR4 AMPA Receptor Subunit Modulates PKC-Driven Receptor Phosphorylation and Surface Expression. Traffic 2006; 8:259-69. [PMID: 17233759 DOI: 10.1111/j.1600-0854.2006.00521.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Changes in the synaptic content of alpha-amino-3-hydroxy-5-methyl-4-isoxazolepropionate (AMPA)-type glutamate receptors lead to synaptic efficacy modifications, involved in synaptic plasticity mechanisms believed to underlie learning and memory formation. Early in development, GluR4 is highly expressed in the hippocampus, and GluR4-containing AMPA receptors are inserted into synapses. During synapse maturation, the number of AMPA receptors at the synapse is dynamically regulated, and both addition and removal of receptors from postsynaptic sites occur through regulated mechanisms. GluR4 delivery to synapses in rat hippocampal slices was shown to require protein kinase A (PKA)-mediated phosphorylation of GluR4 at serine 842 (Ser842). Protein kinase C (PKC) can also phosphorylate Ser842, and we have shown that PKCgamma can associate with GluR4. Here we show that activation of PKC in retina neurons, or in human embryonic kidney 293 cells cotransfected with GluR4 and PKCgamma, increases GluR4 surface expression and Ser842 phosphorylation. Moreover, mutation of amino acids R821A, K825A and R826A at the GluR4 C-terminal, within the interacting region of GluR4 with PKCgamma, abolishes the interaction between PKCgamma and GluR4 and prevents the stimulatory effect of PKCgamma on GluR4 Ser842 phosphorylation and surface expression. These data argue for a role of anchored PKCgamma in Ser842 phosphorylation and targeting to the plasma membrane. The triple GluR4 mutant is, however, phosphorylated by PKA, and it is targeted to the synapse in CA1 hippocampal neurons in organotypic rat hippocampal slices. The present findings show that the interaction between PKCgamma and GluR4 is specifically required to assure PKC-driven phosphorylation and surface membrane expression of GluR4.
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Affiliation(s)
- André R Gomes
- Center for Neuroscience and Cell Biology, University of Coimbra, Coimbra 3004-517, Portugal
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Gerges NZ, Backos DS, Rupasinghe CN, Spaller MR, Esteban JA. Dual role of the exocyst in AMPA receptor targeting and insertion into the postsynaptic membrane. EMBO J 2006; 25:1623-34. [PMID: 16601687 PMCID: PMC1440842 DOI: 10.1038/sj.emboj.7601065] [Citation(s) in RCA: 119] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2005] [Accepted: 03/03/2006] [Indexed: 02/08/2023] Open
Abstract
Intracellular membrane trafficking of glutamate receptors at excitatory synapses is critical for synaptic function. However, little is known about the specialized trafficking events occurring at the postsynaptic membrane. We have found that two components of the exocyst complex, Sec8 and Exo70, separately control synaptic targeting and insertion of AMPA-type glutamate receptors. Sec8 controls the directional movement of receptors towards synapses through PDZ-dependent interactions. In contrast, Exo70 mediates receptor insertion at the postsynaptic membrane, but it does not participate in receptor targeting. Thus, interference with Exo70 function accumulates AMPA receptors inside the spine, forming a complex physically associated, but not yet fused with the postsynaptic membrane. Electron microscopic analysis of these complexes indicates that Exo70 mediates AMPA receptor insertion directly within the postsynaptic density, rather than at extrasynaptic membranes. Therefore, we propose a molecular and anatomical model that dissects AMPA receptor sorting and synaptic delivery within the spine, and uncovers new functions of the exocyst at the postsynaptic membrane.
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Affiliation(s)
- Nashaat Z Gerges
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI USA
| | - Donald S Backos
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI USA
| | | | - Mark R Spaller
- Department of Chemistry, Wayne State University, Detroit, MI, USA
| | - José A Esteban
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, MI USA
- Department of Pharmacology, University of Michigan Medical School, 1150 W Medical Center Drive, Ann Arbor, MI 48109-0632, USA. Tel.: +1 734 615 2686; Fax: +1 734 763 4450; E-mail:
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Ruiz de Temiño M, Esteban JA, Elías J, González N, Gracia J, Romeo M, Escartín R, Burgués P, Sainz A, Pueyo C. [Esophageal atresia type I. Is impossible possible?]. Cir Pediatr 2006; 19:39-45. [PMID: 16671511] [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] [Subscribe] [Scholar Register] [Indexed: 05/09/2023]
Abstract
INTRODUCTION Treatment of esophageal atresia with "long gap" remains difficult and controversial. According to the idea that esophageal anastomosis is imposible in most cases, several esophageal substitution methods have been proposed, as esophagocoloplasty, gastric transposition or reversed gastric tube. Nevertheless reconstruction of native esophagus is accepted as the best option if posible. "Long gap" definition is imprecise, expressed by variability in percent of these cases in total esophageal atresias reported in different series in literature. We report our experience in seven cases type I esophageal atresia with long gap and the different therapeutic options used, with attention to delayed or early esophageal anastomosis feasibility and outcome. MATERIAL AND METHODS We have treated 121 patients with esophageal atresia from whom we analized 7 cases with pure esophageal atresia with "long gap" (5.8%). Six patients underwent gastrostomy and two gastrostomy and esophagostomy. Five patient underwent primary repair with esophageal anastomosis, delayed between 14 days and 4 months in 4 cases. One patient underwent esophageal anastomosis in the first day without gastrostomy. Retroesternal esophagocoloplasty was performed in 2 patients about their first year of life. Esophagogram was done in first month after surgery and pH monitoring of gastroesophageal reflux. Follow-up ranged from 6 months to 28 years. RESULTS Esophageal anastomosis was feasible in all 5 patients in whom it was tried. Stricture occurred in two patients, one patient underwent anastomotic resection and new esophageal anastomosis. Esophageal reflux was present in two patients, one of them required funduplication. One patient was dead by complications of cardiac malformation. Remaining patients have normal swallowing and are in normal growth curves. Patients with esophagocoloplasty had not relevant early or late complications. CONCLUSIONS In most pure esophageal atresia, delayed or even early esophageal anastomosis is feasible, making use of surgical and anesthesic sources that favour it. Esophageal substitution techniques can be reserved if this approach fails.
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Affiliation(s)
- M Ruiz de Temiño
- Servicio de Cirugía Pediátrica, Hospital Infantil Miguel Servet, Zaragoza
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Brown TC, Tran IC, Backos DS, Esteban JA. NMDA receptor-dependent activation of the small GTPase Rab5 drives the removal of synaptic AMPA receptors during hippocampal LTD. Neuron 2005; 45:81-94. [PMID: 15629704 DOI: 10.1016/j.neuron.2004.12.023] [Citation(s) in RCA: 187] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2004] [Revised: 07/20/2004] [Accepted: 12/03/2004] [Indexed: 11/17/2022]
Abstract
The activity-dependent removal of AMPA receptors from synapses underlies long-term depression in hippocampal excitatory synapses. In this study, we have investigated the role of the small GTPase Rab5 during this process. We propose that Rab5 is a critical link between the signaling cascades triggered by LTD induction and the machinery that executes the activity-dependent removal of AMPA receptors. We have found that Rab5 activation drives the specific internalization of synaptic AMPA receptors in a clathrin-dependent manner and that this activity is required for LTD. Interestingly, Rab5 does not participate in the constitutive cycling of AMPA receptors. Rab5 is able to remove both GluR1 and GluR2 AMPA receptor subunits, leading to GluR1 dephosphorylation. Importantly, NMDA receptor-dependent LTD induction produces a rapid and transient increase of active (GTP bound) Rab5. We propose a model in which synaptic activity leads to Rab5 activation, which in turn drives the removal of AMPA receptors from synapses.
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Affiliation(s)
- Tyler C Brown
- Neuroscience Program, University of Michigan Medical School, Ann Arbor, MI 48109, USA
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Gerges NZ, Brown TC, Correia SS, Esteban JA. Analysis of Rab protein function in neurotransmitter receptor trafficking at hippocampal synapses. Methods Enzymol 2005; 403:153-66. [PMID: 16473584 DOI: 10.1016/s0076-6879(05)03013-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Members of the Rab family of small GTPases are essential regulators of intracellular membrane sorting. Nevertheless, very little is known about the role of these proteins in the membrane trafficking processes that operate at synapses, and specifically, at postsynaptic terminals. These events include the activity-dependent exocytic and endocytic trafficking of AMPA-type glutamate receptors, which underlies long-lasting forms of synaptic plasticity such as long-term potentiation (LTP) and long-term depression (LTD). This chapter summarizes different experimental methods to address the role of Rab proteins in the trafficking of neurotransmitter receptors at postsynaptic terminals in the hippocampus. These techniques include immunogold electron microscopy to ultrastructurally localize endogenous Rab proteins at synapses, molecular biology methods to express recombinant Rab proteins in hippocampal slice cultures, electrophysiological techniques to evaluate the role of Rab proteins in synaptic transmission, and confocal fluorescence imaging to monitor receptor trafficking at dendrites and spines and its dependence on Rab proteins.
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Gerges NZ, Backos DS, Esteban JA. Local control of AMPA receptor trafficking at the postsynaptic terminal by a small GTPase of the Rab family. J Biol Chem 2004; 279:43870-8. [PMID: 15297461 DOI: 10.1074/jbc.m404982200] [Citation(s) in RCA: 117] [Impact Index Per Article: 5.9] [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: 12/23/2022] Open
Abstract
The delivery of neurotransmitter receptors into the synaptic membrane is essential for synaptic function and plasticity. However, the molecular mechanisms of these specialized trafficking events and their integration with the intracellular membrane transport machinery are virtually unknown. Here, we have investigated the role of the Rab family of membrane sorting proteins in the late stages of receptor trafficking into the postsynaptic membrane. We have identified Rab8, a vesicular transport protein associated with trans-Golgi network membranes, as a critical component of the cellular machinery that delivers AMPA-type glutamatergic receptors (AMPARs) into synapses. Using electron microscopic techniques, we have found that Rab8 is localized in close proximity to the synaptic membrane, including the postsynaptic density. Electrophysiological studies indicated that Rab8 is necessary for the synaptic delivery of AMPARs during plasticity (long-term potentiation) and during constitutive receptor cycling. In addition, Rab8 is required for AMPAR delivery into the spine surface, but not for receptor transport from the dendritic shaft into the spine compartment or for delivery into the dendritic surface. Therefore, Rab8 specifically drives the local delivery of AMPARs into synapses. These results demonstrate a new role for the cellular secretory machinery in the control of synaptic function and plasticity directly at the postsynaptic membrane.
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Affiliation(s)
- Nashaat Z Gerges
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor 48109-0632, USA
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50
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Gerges NZ, Tran IC, Backos DS, Harrell JM, Chinkers M, Pratt WB, Esteban JA. Independent functions of hsp90 in neurotransmitter release and in the continuous synaptic cycling of AMPA receptors. J Neurosci 2004; 24:4758-66. [PMID: 15152036 PMCID: PMC6729466 DOI: 10.1523/jneurosci.0594-04.2004] [Citation(s) in RCA: 62] [Impact Index Per Article: 3.1] [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: 12/01/2003] [Revised: 04/05/2004] [Accepted: 04/05/2004] [Indexed: 11/21/2022] Open
Abstract
The delivery of neurotransmitter receptors into synapses is essential for synaptic function and plasticity. In particular, AMPA-type glutamate receptors (AMPA receptors) reach excitatory synapses according to two distinct routes: a regulated pathway, which operates transiently during synaptic plasticity, and a constitutive pathway, which maintains synaptic function under conditions of basal transmission. However, the specific mechanisms that distinguish these two trafficking pathways are essentially unknown. Here, we evaluate the role of the molecular chaperone hsp90 (heat shock protein 90) in excitatory synaptic transmission in the hippocampus. On one hand, we found that hsp90 is necessary for the efficient neurotransmitter release at the presynaptic terminal. In addition, we identified hsp90 as a critical component of the cellular machinery that delivers AMPA receptors into the postsynaptic membrane. Using the hsp90-specific inhibitors radicicol and geldanamycin, we show that hsp90 is required for the constitutive trafficking of AMPA receptors into synapses during their continuous cycling between synaptic and nonsynaptic sites. In contrast, hsp90 function is not required for either the surface delivery of AMPA receptors into the nonsynaptic plasma membrane or for the acute, regulated delivery of AMPA receptors into synapses during plasticity induction (long-term potentiation). The synaptic cycling of AMPA receptors was also blocked by an hsp90-binding tetratricopeptide repeat (TPR) domain, suggesting that the role of hsp90 in AMPA receptor trafficking is mediated by a TPR domain-containing protein. These results demonstrate new roles for hsp90 in synaptic function by controlling neurotransmitter release and, independently, by mediating the continuous cycling of synaptic AMPA receptors.
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Affiliation(s)
- Nashaat Z Gerges
- Department of Pharmacology, University of Michigan Medical School, Ann Arbor, Michigan 48109, USA
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