1
|
Jin M, Iwamoto Y, Shirazinejad C, Drubin DG. Intersectin1 promotes clathrin-mediated endocytosis by organizing and stabilizing endocytic protein interaction networks. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.04.22.590579. [PMID: 38712149 PMCID: PMC11071352 DOI: 10.1101/2024.04.22.590579] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2024]
Abstract
During clathrin-mediated endocytosis (CME), dozens of proteins are recruited to nascent CME sites on the plasma membrane. Coordination of endocytic protein recruitment in time and space is important for efficient CME. Here, we show that the multivalent scaffold protein intersectin1 (ITSN1) promotes CME by organizing and stabilizing endocytic protein interaction networks. By live-cell imaging of genome-edited cells, we observed that endogenously labeled ITSN1 is recruited to CME sites shortly after they begin to assemble. Knocking down ITSN1 impaired endocytic protein recruitment during the stabilization stage of CME site assembly. Artificially locating ITSN1 to the mitochondria surface was sufficient to assemble puncta consisting of CME initiation proteins, including EPS15, FCHO, adaptor proteins, the AP2 complex and epsin1 (EPN1), and the vesicle scission GTPase dynamin2 (DNM2). ITSN1 can form puncta and recruit DNM2 independently of EPS15/FCHO or EPN1. Our work redefines ITSN1's primary endocytic role as organizing and stabilizing the CME protein interaction networks rather than a previously suggested role in initiation and provides new insights into the multi-step and multi-zone organization of CME site assembly.
Collapse
Affiliation(s)
- Meiyan Jin
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
- Current Address: Department of Biology, University of Florida, Gainesville, Fl 32611, USA
| | - Yuichiro Iwamoto
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
| | - Cyna Shirazinejad
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
| | - David G. Drubin
- Department of Molecular and Cell Biology, University of California, Berkeley, CA 94720, USA
- Lead author
| |
Collapse
|
2
|
Borreca A, Mantovani C, Desiato G, Corradini I, Filipello F, Elia CA, D'Autilia F, Santamaria G, Garlanda C, Morini R, Pozzi D, Matteoli M. Loss of interleukin 1 signaling causes impairment of microglia- mediated synapse elimination and autistic-like behaviour in mice. Brain Behav Immun 2024; 117:493-509. [PMID: 38307446 DOI: 10.1016/j.bbi.2024.01.221] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/05/2023] [Revised: 01/11/2024] [Accepted: 01/25/2024] [Indexed: 02/04/2024] Open
Abstract
In the last years, the hypothesis that elevated levels of proinflammatory cytokines contribute to the pathogenesis of neurodevelopmental diseases has gained popularity. IL-1 is one of the main cytokines found to be elevated in Autism spectrum disorder (ASD), a complex neurodevelopmental condition characterized by defects in social communication and cognitive impairments. In this study, we demonstrate that mice lacking IL-1 signaling display autistic-like defects associated with an excessive number of synapses. We also show that microglia lacking IL-1 signaling at early neurodevelopmental stages are unable to properly perform the process of synapse engulfment and display excessive activation of mammalian target of rapamycin (mTOR) signaling. Notably, even the acute inhibition of IL-1R1 by IL-1Ra is sufficient to enhance mTOR signaling and reduce synaptosome phagocytosis in WT microglia. Finally, we demonstrate that rapamycin treatment rescues the defects in IL-1R deficient mice. These data unveil an exclusive role of microglial IL-1 in synapse refinement via mTOR signaling and indicate a novel mechanism possibly involved in neurodevelopmental disorders associated with defects in the IL-1 pathway.
Collapse
Affiliation(s)
- Antonella Borreca
- Institute of Neuroscience (IN-CNR), Consiglio Nazionale delle Ricerche, Milan, Italy; IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Milan, Italy
| | - Cristina Mantovani
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Milan, Italy; Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20072 Pieve Emanuele, Milan, Italy
| | - Genni Desiato
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Milan, Italy
| | - Irene Corradini
- Institute of Neuroscience (IN-CNR), Consiglio Nazionale delle Ricerche, Milan, Italy; IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Milan, Italy
| | - Fabia Filipello
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Milan, Italy
| | - Chiara Adriana Elia
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Milan, Italy
| | - Francesca D'Autilia
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Milan, Italy
| | - Giulia Santamaria
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Milan, Italy
| | - Cecilia Garlanda
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Milan, Italy; Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20072 Pieve Emanuele, Milan, Italy
| | - Raffaella Morini
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Milan, Italy
| | - Davide Pozzi
- IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Milan, Italy; Department of Biomedical Sciences, Humanitas University, Via Rita Levi Montalcini 4, 20072 Pieve Emanuele, Milan, Italy.
| | - Michela Matteoli
- Institute of Neuroscience (IN-CNR), Consiglio Nazionale delle Ricerche, Milan, Italy; IRCCS Humanitas Research Hospital, Via Manzoni 56, 20089 Rozzano, Milan, Italy.
| |
Collapse
|
3
|
Vollweiter D, Shergill JK, Hilse A, Kochlamazashvili G, Koch SP, Mueller S, Boehm-Sturm P, Haucke V, Maritzen T. Intersectin deficiency impairs cortico-striatal neurotransmission and causes obsessive-compulsive behaviors in mice. Proc Natl Acad Sci U S A 2023; 120:e2304323120. [PMID: 37603735 PMCID: PMC10469033 DOI: 10.1073/pnas.2304323120] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2023] [Accepted: 07/24/2023] [Indexed: 08/23/2023] Open
Abstract
The generation of appropriate behavioral responses involves dedicated neuronal circuits. The cortico-striatal-thalamo-cortical loop is especially important for the expression of motor routines and habits. Defects in this circuitry are closely linked to obsessive stereotypic behaviors, hallmarks of neuropsychiatric diseases including autism spectrum disorders (ASDs) and obsessive-compulsive disorders (OCDs). However, our knowledge of the essential synaptic machinery required to maintain balanced neurotransmission and plasticity within the cortico-striatal circuitry remains fragmentary. Mutations in the large synaptic scaffold protein intersectin1 (ITSN1) have been identified in patients presenting with ASD symptoms including stereotypic behaviors, although a causal relationship between stereotypic behavior and intersectin function has not been established. We report here that deletion of the two closely related proteins ITSN1 and ITSN2 leads to severe ASD/OCD-like behavioral alterations and defective cortico-striatal neurotransmission in knockout (KO) mice. Cortico-striatal function was compromised at multiple levels in ITSN1/2-depleted animals. Morphological analyses showed that the striatum of intersectin KO mice is decreased in size. Striatal neurons exhibit reduced complexity and an underdeveloped dendritic spine architecture. These morphological abnormalities correlate with defects in cortico-striatal neurotransmission and plasticity as well as reduced N-methyl-D-aspartate (NMDA) receptor currents as a consequence of postsynaptic NMDA receptor depletion. Our findings unravel a physiological role of intersectin in cortico-striatal neurotransmission to counteract ASD/OCD. Moreover, we delineate a molecular pathomechanism for the neuropsychiatric symptoms of patients carrying intersectin mutations that correlates with the observation that NMDA receptor dysfunction is a recurrent feature in the development of ASD/OCD-like symptoms.
Collapse
Affiliation(s)
- Dennis Vollweiter
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, 13125Berlin, Germany
- Department of Nanophysiology, Faculty of Biology, Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, 67663Kaiserslautern, Germany
| | - Jasmeet Kaur Shergill
- Department of Nanophysiology, Faculty of Biology, Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, 67663Kaiserslautern, Germany
| | - Alexandra Hilse
- Department of Nanophysiology, Faculty of Biology, Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, 67663Kaiserslautern, Germany
| | | | - Stefan Paul Koch
- Charité–Universitätsmedizin Berlin, Charité 3R | Replace, Reduce, Refine, 10117Berlin, Germany
- Charité–Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Experimental Neurology and Center for Stroke Research, Charitéplatz 1, 10117Berlin, Germany
- Charité-Universitätsmedizin Berlin, NeuroCure Cluster of Excellence and Charité Core Facility 7T Experimental MRIs, 10117Berlin, Germany
| | - Susanne Mueller
- Charité–Universitätsmedizin Berlin, Charité 3R | Replace, Reduce, Refine, 10117Berlin, Germany
- Charité–Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Experimental Neurology and Center for Stroke Research, Charitéplatz 1, 10117Berlin, Germany
- Charité-Universitätsmedizin Berlin, NeuroCure Cluster of Excellence and Charité Core Facility 7T Experimental MRIs, 10117Berlin, Germany
| | - Philipp Boehm-Sturm
- Charité–Universitätsmedizin Berlin, Charité 3R | Replace, Reduce, Refine, 10117Berlin, Germany
- Charité–Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Department of Experimental Neurology and Center for Stroke Research, Charitéplatz 1, 10117Berlin, Germany
- Charité-Universitätsmedizin Berlin, NeuroCure Cluster of Excellence and Charité Core Facility 7T Experimental MRIs, 10117Berlin, Germany
| | - Volker Haucke
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, 13125Berlin, Germany
- NeuroCure Cluster of Excellence, Charité–Universitätsmedizin Berlin, 10117Berlin, Germany
- Freie Universität Berlin, Faculty of Biology, Chemistry and Pharmacy, 14195Berlin, Germany
| | - Tanja Maritzen
- Leibniz-Forschungsinstitut für Molekulare Pharmakologie, 13125Berlin, Germany
- Department of Nanophysiology, Faculty of Biology, Rheinland-Pfälzische Technische Universität Kaiserslautern-Landau, 67663Kaiserslautern, Germany
| |
Collapse
|
4
|
A Nuclear Belt Fastens on Neural Cell Fate. Cells 2022; 11:cells11111761. [PMID: 35681456 PMCID: PMC9179901 DOI: 10.3390/cells11111761] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/20/2022] [Accepted: 05/21/2022] [Indexed: 12/22/2022] Open
Abstract
Successful embryonic and adult neurogenesis require proliferating neural stem and progenitor cells that are intrinsically and extrinsically guided into a neuronal fate. In turn, migration of new-born neurons underlies the complex cytoarchitecture of the brain. Proliferation and migration are therefore essential for brain development, homeostasis and function in adulthood. Among several tightly regulated processes involved in brain formation and function, recent evidence points to the nuclear envelope (NE) and NE-associated components as critical new contributors. Classically, the NE was thought to merely represent a barrier mediating selective exchange between the cytoplasm and nucleoplasm. However, research over the past two decades has highlighted more sophisticated and diverse roles for NE components in progenitor fate choice and migration of their progeny by tuning gene expression via interactions with chromatin, transcription factors and epigenetic factors. Defects in NE components lead to neurodevelopmental impairments, whereas age-related changes in NE components are proposed to influence neurodegenerative diseases. Thus, understanding the roles of NE components in brain development, maintenance and aging is likely to reveal new pathophysiological mechanisms for intervention. Here, we review recent findings for the previously underrepresented contribution of the NE in neuronal commitment and migration, and envision future avenues for investigation.
Collapse
|
5
|
McNeill A. New year, new issue. Eur J Hum Genet 2022; 30:1-2. [PMID: 34848845 PMCID: PMC8738724 DOI: 10.1038/s41431-021-01014-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Affiliation(s)
- Alisdair McNeill
- grid.11835.3e0000 0004 1936 9262Department of Neuroscience, The University of Sheffield, Sheffield, UK ,grid.413991.70000 0004 0641 6082Sheffield Clinical Genetics Department, Sheffield Children’s Hospital NHS Foundation Trust, Sheffield, UK
| |
Collapse
|