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Moretto E, Miozzo F, Longatti A, Bonnet C, Coussen F, Jaudon F, Cingolani LA, Passafaro M. The tetraspanin TSPAN5 regulates AMPAR exocytosis by interacting with the AP4 complex. eLife 2023; 12:76425. [PMID: 36795458 PMCID: PMC9934860 DOI: 10.7554/elife.76425] [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] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Accepted: 01/25/2023] [Indexed: 02/17/2023] Open
Abstract
Intracellular trafficking of AMPA receptors is a tightly regulated process which involves several adaptor proteins, and is crucial for the activity of excitatory synapses both in basal conditions and during synaptic plasticity. We found that, in rat hippocampal neurons, an intracellular pool of the tetraspanin TSPAN5 promotes exocytosis of AMPA receptors without affecting their internalisation. TSPAN5 mediates this function by interacting with the adaptor protein complex AP4 and Stargazin and possibly using recycling endosomes as a delivery route. This work highlights TSPAN5 as a new adaptor regulating AMPA receptor trafficking.
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Affiliation(s)
- Edoardo Moretto
- Institute of Neuroscience, CNRVedano al LambroItaly,NeuroMI Milan Center for Neuroscience, University of Milano-BicoccaMilanItaly
| | | | | | - Caroline Bonnet
- University of Bordeaux, Interdisciplinary Institute for NeuroscienceBordeauxFrance
| | - Francoise Coussen
- University of Bordeaux, Interdisciplinary Institute for NeuroscienceBordeauxFrance
| | - Fanny Jaudon
- Department of Life Sciences, University of TriesteTriesteItaly,IRCCS Ospedale Policlinico San MartinoGenoaItaly
| | - Lorenzo A Cingolani
- Department of Life Sciences, University of TriesteTriesteItaly,Center for Synaptic Neuroscience and Technology (NSYN), Istituto Italiano di Tecnologia (IIT)GenoaItaly
| | - Maria Passafaro
- Institute of Neuroscience, CNRVedano al LambroItaly,NeuroMI Milan Center for Neuroscience, University of Milano-BicoccaMilanItaly
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Murru L, Ponzoni L, Longatti A, Mazzoleni S, Giansante G, Bassani S, Sala M, Passafaro M. Lateral habenula dysfunctions in Tm4sf2 -/y mice model for neurodevelopmental disorder. Neurobiol Dis 2021; 148:105189. [PMID: 33227491 PMCID: PMC7840593 DOI: 10.1016/j.nbd.2020.105189] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2020] [Revised: 10/30/2020] [Accepted: 11/17/2020] [Indexed: 12/25/2022] Open
Abstract
Mutations in the TM4SF2 gene, which encodes TSPAN7, cause a severe form of intellectual disability (ID) often comorbid with autism spectrum disorder (ASD). Recently, we found that TM4SF2 loss in mice affects cognition. Here, we report that Tm4sf2-/y mice, beyond an ID-like phenotype, display altered sociability, increased repetitive behaviors, anhedonic- and depressive-like states. Cognition relies on the integration of information from several brain areas. In this context, the lateral habenula (LHb) is strategically positioned to coordinate the brain regions involved in higher cognitive functions. Furthermore, in Tm4sf2-/y mice we found that LHb neurons present hypoexcitability, aberrant neuronal firing pattern and altered sodium and potassium voltage-gated ion channels function. Interestingly, we also found a reduced expression of voltage-gated sodium channel and a hyperactivity of the PKC-ERK pathway, a well-known modulator of ion channels activity, which might explain the functional phenotype showed by Tm4sf2-/y mice LHb neurons. These findings support Tm4sf2-/y mice as useful in modeling some ASD-like symptoms. Additionally, we can speculate that LHb functional alteration in Tm4sf2-/y mice might play a role in the disease pathophysiology.
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Affiliation(s)
- Luca Murru
- Institute of Neuroscience, CNR, Milan 20129, Italy; NeuroMI Milan Center for Neuroscience, Università Milano-Bicocca, Milan 20126, Italy.
| | - Luisa Ponzoni
- Department of Medical Biotechnology and Translational Medicine, Università di Milano, Segrate, MI 20090, Italy
| | | | - Sara Mazzoleni
- Institute of Neuroscience, CNR, Milan 20129, Italy; Department of Medical Biotechnology and Translational Medicine, Università di Milano, Segrate, MI 20090, Italy
| | | | - Silvia Bassani
- Institute of Neuroscience, CNR, Milan 20129, Italy; NeuroMI Milan Center for Neuroscience, Università Milano-Bicocca, Milan 20126, Italy
| | - Mariaelvina Sala
- Institute of Neuroscience, CNR, Milan 20129, Italy; NeuroMI Milan Center for Neuroscience, Università Milano-Bicocca, Milan 20126, Italy
| | - Maria Passafaro
- Institute of Neuroscience, CNR, Milan 20129, Italy; NeuroMI Milan Center for Neuroscience, Università Milano-Bicocca, Milan 20126, Italy.
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Murru L, Vezzoli E, Longatti A, Ponzoni L, Falqui A, Folci A, Moretto E, Bianchi V, Braida D, Sala M, D'Adamo P, Bassani S, Francolini M, Passafaro M. Pharmacological Modulation of AMPAR Rescues Intellectual Disability-Like Phenotype in Tm4sf2-/y Mice. Cereb Cortex 2018; 27:5369-5384. [PMID: 28968657 PMCID: PMC5939231 DOI: 10.1093/cercor/bhx221] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [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: 05/03/2017] [Accepted: 08/02/2017] [Indexed: 01/02/2023] Open
Abstract
Intellectual disability affects 2–3% of the world's population and typically begins during childhood, causing impairments in social skills and cognitive abilities. Mutations in the TM4SF2 gene, which encodes the TSPAN7 protein, cause a severe form of intellectual disability, and currently, no therapy is able to ameliorate this cognitive impairment. We previously reported that, in cultured neurons, shRNA-mediated down-regulation of TSPAN7 affects AMPAR trafficking by enhancing PICK1–GluA2 interaction, thereby increasing the intracellular retention of AMPAR. Here, we found that loss of TSPAN7 function in mice causes alterations in hippocampal excitatory synapse structure and functionality as well as cognitive impairment. These changes occurred along with alterations in AMPAR expression levels. We also found that interfering with PICK1–GluA2 binding restored synaptic function in Tm4sf2−/y mice. Moreover, potentiation of AMPAR activity via the administration of the ampakine CX516 reverted the neurological phenotype observed in Tm4sf2−/y mice, suggesting that pharmacological modulation of AMPAR may represent a new approach for treating patients affected by TM4SF2 mutations and intellectual disability.
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Affiliation(s)
- Luca Murru
- CNR Institute of Neuroscience, 20129 Milano, Italy
| | - Elena Vezzoli
- Department of Medical Biotechnology and Translational Medicine, Università degli studi di Milano, Via Vanvitelli 32, 20129 Milano, Italy.,Department of Pharmacological and Biomolecular Sciences (DiSFeB), Università di Milano, Via Balzaretti 9, 20133 Milano, Italy.,Department of Biosciences and Centre for Stem Cell Research, University of Milan and Istituto Nazionale di Genetica Molecolare "Romeo ed Enrica Invernizzi" Milan, Italy
| | - Anna Longatti
- CNR Institute of Neuroscience, 20129 Milano, Italy.,Department of Pharmacological and Biomolecular Sciences (DiSFeB), Università di Milano, Via Balzaretti 9, 20133 Milano, Italy
| | - Luisa Ponzoni
- Department of Medical Biotechnology and Translational Medicine, Università degli studi di Milano, Via Vanvitelli 32, 20129 Milano, Italy.,Fondazione Umberto Veronesi, Piazza Velasca 5, 20122 Milan, Italy
| | - Andrea Falqui
- Biological and Environmental Sciences and Engineering Division, King Abdullah University for Science and Technology (KAUST), Thuwal 23955-6900, Kingdom of Saudi Arabia
| | | | | | - Veronica Bianchi
- Division of Neuroscience, IRCSS San Raffaele Scientific Institute, 20132 Milan, Italy
| | - Daniela Braida
- Department of Medical Biotechnology and Translational Medicine, Università degli studi di Milano, Via Vanvitelli 32, 20129 Milano,Italy
| | | | - Patrizia D'Adamo
- Division of Neuroscience, IRCSS San Raffaele Scientific Institute, 20132 Milan, Italy
| | | | - Maura Francolini
- Department of Medical Biotechnology and Translational Medicine, Università degli studi di Milano, Via Vanvitelli 32, 20129 Milano,Italy
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Marazzini PM, Crossignani RM, Fois R, Longatti A, Telli L. [Transfer of a very low birth weight newborn infant to the intensive therapy center at birth. Transfer "in utero" or after delivery?]. Minerva Pediatr 1991; 43:701-9. [PMID: 1791797] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
During the 1975-1984 period, 93 infants weighing 1500 g or less were transferred to the Magenta Perinatal Center Hospital. The survival rate at discharge was 82.9% for infants transferred in utero and 63.5% for infants transferred postnatally (p less than 0.05). The incidence of major neurological sequelae was 3.1% and 23.3% respectively (p less than 0.02). This experience confirms that the high risk pregnancies should be referred to the Perinatal Center for optimal care of the mother, fetus and newborn infant.
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Affiliation(s)
- P M Marazzini
- Divisione di Pediatria e Patologia Neonatale, Ospedale Provinciale G. Fornaroli, Magenta, MI
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Marazzini PM, Cerri MA, Colombo P, Telli L, Longatti A, Calò S. [Very low birth weight neonates: from perinatal care to neurological follow-up. I. Review of the world literature]. Minerva Pediatr 1987; 39:1147-56. [PMID: 3330180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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