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Longaretti A, Forastieri C, Toffolo E, Caffino L, Locarno A, Misevičiūtė I, Marchesi E, Battistin M, Ponzoni L, Madaschi L, Cambria C, Bonasoni MP, Sala M, Perrone D, Fumagalli F, Bassani S, Antonucci F, Tonini R, Francolini M, Battaglioli E, Rusconi F. LSD1 is an environmental stress-sensitive negative modulator of the glutamatergic synapse. Neurobiol Stress 2020; 13:100280. [PMID: 33457471 PMCID: PMC7794663 DOI: 10.1016/j.ynstr.2020.100280] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2020] [Revised: 11/19/2020] [Accepted: 11/22/2020] [Indexed: 12/22/2022] Open
Abstract
Along with neuronal mechanisms devoted to memory consolidation –including long term potentiation of synaptic strength as prominent electrophysiological correlate, and inherent dendritic spines stabilization as structural counterpart– negative control of memory formation and synaptic plasticity has been described at the molecular and behavioral level. Within this work, we report a role for the epigenetic corepressor Lysine Specific Demethylase 1 (LSD1) as a negative neuroplastic factor whose stress-enhanced activity may participate in coping with adverse experiences. Constitutively increasing LSD1 activity via knocking out its dominant negative splicing isoform neuroLSD1 (neuroLSD1KO mice), we observed extensive structural, functional and behavioral signs of excitatory decay, including disrupted memory consolidation. A similar LSD1 increase, obtained with acute antisense oligonucleotide-mediated neuroLSD1 splicing knock down in primary neuronal cultures, dampens spontaneous glutamatergic transmission, reducing mEPSCs. Remarkably, LSD1 physiological increase occurs in response to psychosocial stress-induced glutamatergic signaling. Since this mechanism entails neuroLSD1 splicing downregulation, we conclude that LSD1/neuroLSD1 ratio modulation in the hippocampus is instrumental to a negative homeostatic feedback, restraining glutamatergic neuroplasticity in response to glutamate. The active process of forgetting provides memories with salience. With our work, we propose that softening memory traces of adversities could further represent a stress-coping process in which LSD1/neuroLSD1 ratio modulation may help preserving healthy emotional references.
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Affiliation(s)
- A Longaretti
- Dept. of Medical Biotechnology and Translational Medicine, Università Degli Studi di Milano, Via F.lli Cervi, 93, Segrate (MI), Italy
| | - C Forastieri
- Dept. of Medical Biotechnology and Translational Medicine, Università Degli Studi di Milano, Via F.lli Cervi, 93, Segrate (MI), Italy
| | - E Toffolo
- Dept. of Medical Biotechnology and Translational Medicine, Università Degli Studi di Milano, Via F.lli Cervi, 93, Segrate (MI), Italy
| | - L Caffino
- Dept. of Pharmacological and Biomolecular Sciences, Università Degli Studi di Milano, Via Balzaretti, 9, Milano, Italy
| | - A Locarno
- Neuromodulation of Cortical and Subcortical Circuits Laboratory, Istituto Italiano di Tecnologia, Via Morengo, 30, Genova, 16163, Italy
| | - I Misevičiūtė
- Neuromodulation of Cortical and Subcortical Circuits Laboratory, Istituto Italiano di Tecnologia, Via Morengo, 30, Genova, 16163, Italy
| | - E Marchesi
- Dept. of Chemical and Pharmaceutical Sciences, Università di Ferrara, Via Borsari, 46, Ferrara, Italy
| | - M Battistin
- Dept. of Medical Biotechnology and Translational Medicine, Università Degli Studi di Milano, Via F.lli Cervi, 93, Segrate (MI), Italy
| | - L Ponzoni
- Institute of Neuroscience, Consiglio Nazionale Delle Ricerche (CNR), Via Vanvitelli, 32, Milan, Italy
| | - L Madaschi
- UNITECH NO LIMITS, Università Degli Studi di Milano, Via Celoria, 26, Milan, Italy
| | - C Cambria
- Dept. of Medical Biotechnology and Translational Medicine, Università Degli Studi di Milano, Via F.lli Cervi, 93, Segrate (MI), Italy
| | - M P Bonasoni
- ASMN Santa Maria Nuova Via Risorgimento, 80 Reggio Emilia, Italy
| | - M Sala
- Institute of Neuroscience, Consiglio Nazionale Delle Ricerche (CNR), Via Vanvitelli, 32, Milan, Italy
| | - D Perrone
- Dept. of Chemical and Pharmaceutical Sciences, Università di Ferrara, Via Borsari, 46, Ferrara, Italy
| | - F Fumagalli
- Dept. of Pharmacological and Biomolecular Sciences, Università Degli Studi di Milano, Via Balzaretti, 9, Milano, Italy
| | - S Bassani
- Institute of Neuroscience, Consiglio Nazionale Delle Ricerche (CNR), Via Vanvitelli, 32, Milan, Italy
| | - F Antonucci
- Dept. of Medical Biotechnology and Translational Medicine, Università Degli Studi di Milano, Via F.lli Cervi, 93, Segrate (MI), Italy
| | - R Tonini
- Neuromodulation of Cortical and Subcortical Circuits Laboratory, Istituto Italiano di Tecnologia, Via Morengo, 30, Genova, 16163, Italy
| | - M Francolini
- Dept. of Medical Biotechnology and Translational Medicine, Università Degli Studi di Milano, Via F.lli Cervi, 93, Segrate (MI), Italy
| | - E Battaglioli
- Dept. of Medical Biotechnology and Translational Medicine, Università Degli Studi di Milano, Via F.lli Cervi, 93, Segrate (MI), Italy
| | - F Rusconi
- Dept. of Medical Biotechnology and Translational Medicine, Università Degli Studi di Milano, Via F.lli Cervi, 93, Segrate (MI), Italy
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