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Medina E, Peterson S, Ford K, Singletary K, Peixoto L. Critical periods and Autism Spectrum Disorders, a role for sleep. Neurobiol Sleep Circadian Rhythms 2023; 14:100088. [PMID: 36632570 PMCID: PMC9826922 DOI: 10.1016/j.nbscr.2022.100088] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 12/16/2022] [Accepted: 12/19/2022] [Indexed: 12/24/2022] Open
Abstract
Brain development relies on both experience and genetically defined programs. Time windows where certain brain circuits are particularly receptive to external stimuli, resulting in heightened plasticity, are referred to as "critical periods". Sleep is thought to be essential for normal brain development. Importantly, studies have shown that sleep enhances critical period plasticity and promotes experience-dependent synaptic pruning in the developing mammalian brain. Therefore, normal plasticity during critical periods depends on sleep. Problems falling and staying asleep occur at a higher rate in Autism Spectrum Disorder (ASD) relative to typical development. In this review, we explore the potential link between sleep, critical period plasticity, and ASD. First, we review the importance of critical period plasticity in typical development and the role of sleep in this process. Next, we summarize the evidence linking ASD with deficits in synaptic plasticity in rodent models of high-confidence ASD gene candidates. We then show that the high-confidence rodent models of ASD that show sleep deficits also display plasticity deficits. Given how important sleep is for critical period plasticity, it is essential to understand the connections between synaptic plasticity, sleep, and brain development in ASD. However, studies investigating sleep or plasticity during critical periods in ASD mouse models are lacking. Therefore, we highlight an urgent need to consider developmental trajectory in studies of sleep and plasticity in neurodevelopmental disorders.
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Affiliation(s)
- Elizabeth Medina
- Department of Translational Medicine and Physiology, Sleep and Performance Research Center, Elson S. Floyd College of Medicine, Washington State University, Spokane, WA, United States
| | - Sarah Peterson
- Department of Translational Medicine and Physiology, Sleep and Performance Research Center, Elson S. Floyd College of Medicine, Washington State University, Spokane, WA, United States
| | - Kaitlyn Ford
- Department of Translational Medicine and Physiology, Sleep and Performance Research Center, Elson S. Floyd College of Medicine, Washington State University, Spokane, WA, United States
| | - Kristan Singletary
- Department of Translational Medicine and Physiology, Sleep and Performance Research Center, Elson S. Floyd College of Medicine, Washington State University, Spokane, WA, United States
| | - Lucia Peixoto
- Department of Translational Medicine and Physiology, Sleep and Performance Research Center, Elson S. Floyd College of Medicine, Washington State University, Spokane, WA, United States
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2
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Yamashita A, Shichino Y, Fujii K, Koshidaka Y, Adachi M, Sasagawa E, Mito M, Nakagawa S, Iwasaki S, Takao K, Shiina N. ILF3 prion-like domain regulates gene expression and fear memory under chronic stress. iScience 2023; 26:106229. [PMID: 36876121 PMCID: PMC9982275 DOI: 10.1016/j.isci.2023.106229] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2022] [Revised: 01/11/2023] [Accepted: 02/14/2023] [Indexed: 02/22/2023] Open
Abstract
The prion-like domain (PrLD) is a class of intrinsically disordered regions. Although its propensity to form condensates has been studied in the context of neurodegenerative diseases, the physiological role of PrLD remains unclear. Here, we investigated the role of PrLD in the RNA-binding protein NFAR2, generated by a splicing variant of the Ilf3 gene. Removal of the PrLD in mice did not impair the function of NFAR2 required for survival, but did affect the responses to chronic water immersion and restraint stress (WIRS). The PrLD was required for WIRS-sensitive nuclear localization of NFAR2 and WIRS-induced changes in mRNA expression and translation in the amygdala, a fear-related brain region. Consistently, the PrLD conferred resistance to WIRS in fear-associated memory formation. Our study provides insights into the PrLD-dependent role of NFAR2 for chronic stress adaptation in the brain.
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Affiliation(s)
- Akira Yamashita
- Laboratory of Neuronal Cell Biology, National Institute for Basic Biology, Okazaki, Aichi 444-8585, Japan
- Department of Basic Biology, The Graduate University for Advanced Studies, SOKENDAI, Okazaki, Aichi 444-8585, Japan
| | - Yuichi Shichino
- RNA Systems Biochemistry Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama 351-0198, Japan
| | - Kazuki Fujii
- Department of Behavioral Physiology, Faculty of Medicine, University of Toyama, Toyama 930-0194, Japan
- Life Science Research Center, University of Toyama, Toyama 930-0194, Japan
- Research Center for Idling Brain Science, University of Toyama, Toyama 930-0194, Japan
| | - Yumie Koshidaka
- Life Science Research Center, University of Toyama, Toyama 930-0194, Japan
| | - Mayumi Adachi
- Life Science Research Center, University of Toyama, Toyama 930-0194, Japan
| | - Eri Sasagawa
- Department of Behavioral Physiology, Graduate School of Innovative Life Science, University of Toyama, Toyama 930-0194, Japan
| | - Mari Mito
- RNA Systems Biochemistry Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama 351-0198, Japan
| | - Shinichi Nakagawa
- RNA Biology Laboratory, Faculty of Pharmaceutical Sciences, Hokkaido University, Sapporo Hokkaido 060-0812, Japan
| | - Shintaro Iwasaki
- RNA Systems Biochemistry Laboratory, RIKEN Cluster for Pioneering Research, Wako, Saitama 351-0198, Japan
- Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa, Chiba 277-8561, Japan
| | - Keizo Takao
- Department of Behavioral Physiology, Faculty of Medicine, University of Toyama, Toyama 930-0194, Japan
- Life Science Research Center, University of Toyama, Toyama 930-0194, Japan
- Research Center for Idling Brain Science, University of Toyama, Toyama 930-0194, Japan
- Department of Behavioral Physiology, Graduate School of Innovative Life Science, University of Toyama, Toyama 930-0194, Japan
| | - Nobuyuki Shiina
- Laboratory of Neuronal Cell Biology, National Institute for Basic Biology, Okazaki, Aichi 444-8585, Japan
- Department of Basic Biology, The Graduate University for Advanced Studies, SOKENDAI, Okazaki, Aichi 444-8585, Japan
- Exploratory Research Center on Life and Living Systems (ExCELLS), National Institutes of Natural Sciences, Okazaki, Aichi 444-8585, Japan
- Corresponding author
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3
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Pavinato L, Delle Vedove A, Carli D, Ferrero M, Carestiato S, Howe JL, Agolini E, Coviello DA, van de Laar I, Au PYB, Di Gregorio E, Fabbiani A, Croci S, Mencarelli MA, Bruno LP, Renieri A, Veltra D, Sofocleous C, Faivre L, Mazel B, Safraou H, Denommé-Pichon AS, van Slegtenhorst MA, Giesbertz N, van Jaarsveld RH, Childers A, Rogers RC, Novelli A, De Rubeis S, Buxbaum JD, Scherer SW, Ferrero GB, Wirth B, Brusco A. CAPRIN1 haploinsufficiency causes a neurodevelopmental disorder with language impairment, ADHD and ASD. Brain 2023; 146:534-548. [PMID: 35979925 PMCID: PMC10169411 DOI: 10.1093/brain/awac278] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 07/04/2022] [Accepted: 07/11/2022] [Indexed: 11/12/2022] Open
Abstract
We describe an autosomal dominant disorder associated with loss-of-function variants in the Cell cycle associated protein 1 (CAPRIN1; MIM*601178). CAPRIN1 encodes a ubiquitous protein that regulates the transport and translation of neuronal mRNAs critical for synaptic plasticity, as well as mRNAs encoding proteins important for cell proliferation and migration in multiple cell types. We identified 12 cases with loss-of-function CAPRIN1 variants, and a neurodevelopmental phenotype characterized by language impairment/speech delay (100%), intellectual disability (83%), attention deficit hyperactivity disorder (82%) and autism spectrum disorder (67%). Affected individuals also had respiratory problems (50%), limb/skeletal anomalies (50%), developmental delay (42%) feeding difficulties (33%), seizures (33%) and ophthalmologic problems (33%). In patient-derived lymphoblasts and fibroblasts, we showed a monoallelic expression of the wild-type allele, and a reduction of the transcript and protein compatible with a half dose. To further study pathogenic mechanisms, we generated sCAPRIN1+/- human induced pluripotent stem cells via CRISPR-Cas9 mutagenesis and differentiated them into neuronal progenitor cells and cortical neurons. CAPRIN1 loss caused reduced neuronal processes, overall disruption of the neuronal organization and an increased neuronal degeneration. We also observed an alteration of mRNA translation in CAPRIN1+/- neurons, compatible with its suggested function as translational inhibitor. CAPRIN1+/- neurons also showed an impaired calcium signalling and increased oxidative stress, two mechanisms that may directly affect neuronal networks development, maintenance and function. According to what was previously observed in the mouse model, measurements of activity in CAPRIN1+/- neurons via micro-electrode arrays indicated lower spike rates and bursts, with an overall reduced activity. In conclusion, we demonstrate that CAPRIN1 haploinsufficiency causes a novel autosomal dominant neurodevelopmental disorder and identify morphological and functional alterations associated with this disorder in human neuronal models.
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Affiliation(s)
- Lisa Pavinato
- Department of Medical Sciences, University of Turin, 10126 Turin, Italy.,Institute of Human Genetics, Center for Molecular Medicine Cologne, Center for Rare Diseases Cologne, University Hospital Cologne, University of Cologne, 50931 Cologne, Germany
| | - Andrea Delle Vedove
- Institute of Human Genetics, Center for Molecular Medicine Cologne, Center for Rare Diseases Cologne, University Hospital Cologne, University of Cologne, 50931 Cologne, Germany.,Institute for Genetics, University of Cologne, 50674 Cologne, Germany
| | - Diana Carli
- Department of Public Health and Pediatrics, University of Turin, 10126 Turin, Italy.,Pediatric Onco-Hematology, Stem Cell Transplantation and Cell Therapy Division, Regina Margherita Children's Hospital, Città Della Salute e Della Scienza di Torino, 10126 Turin, Italy
| | - Marta Ferrero
- Department of Medical Sciences, University of Turin, 10126 Turin, Italy.,Experimental Zooprophylactic Institute of Piedmont, Liguria e Valle d'Aosta, 10154 Turin, Italy
| | - Silvia Carestiato
- Department of Medical Sciences, University of Turin, 10126 Turin, Italy
| | - Jennifer L Howe
- The Centre for Applied Genomics, Genetics and Genome Biology Program, The Hospital for Sick Children, Toronto, ON M5G 0A4, Canada
| | - Emanuele Agolini
- Laboratory of Medical Genetics, IRCCS, Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - Domenico A Coviello
- Laboratory of Human Genetics, IRCCS Istituto Giannina Gaslini, 16147 Genoa, Italy
| | - Ingrid van de Laar
- Clinical Genetics, Department of Clinical Genetics, Erasmus MC, University Medical Center Rotterdam, 3015 CN, Rotterdam, The Netherlands
| | - Ping Yee Billie Au
- Department of Medical Genetics, Alberta Children's Hospital Research Institute, University of Calgary, Calgary, AB T2N 1N4, Canada
| | - Eleonora Di Gregorio
- Medical Genetics Unit, Città della Salute e della Scienza University Hospital, 10126 Turin, Italy
| | - Alessandra Fabbiani
- Medical Genetics Unit, Azienda Ospedaliera Universitaria Senese, 53100 Siena, Italy.,Medical Genetics, University of Siena, 53100 Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy
| | - Susanna Croci
- Medical Genetics, University of Siena, 53100 Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy
| | | | - Lucia P Bruno
- Medical Genetics, University of Siena, 53100 Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy
| | - Alessandra Renieri
- Medical Genetics Unit, Azienda Ospedaliera Universitaria Senese, 53100 Siena, Italy.,Medical Genetics, University of Siena, 53100 Siena, Italy.,Med Biotech Hub and Competence Center, Department of Medical Biotechnologies, University of Siena, 53100 Siena, Italy
| | - Danai Veltra
- Laboratory of Medical Genetics, School of Medicine, National & Kapodistrian University of Athens, 'Aghia Sophia' Children's Hospital, 11527 Athens, Greece
| | - Christalena Sofocleous
- Laboratory of Medical Genetics, School of Medicine, National & Kapodistrian University of Athens, 'Aghia Sophia' Children's Hospital, 11527 Athens, Greece
| | - Laurence Faivre
- Centre de référence Anomalies du Développement et Syndromes Malformatifs, Fédération Hospitalo-Universitaire TRANSLAD, CHU Dijon, 21079 Dijon, France.,UMR1231 GAD, Inserm-Université Bourgogne-Franche Comté, 21078 Dijon, France
| | - Benoit Mazel
- Centre de référence Anomalies du Développement et Syndromes Malformatifs, Fédération Hospitalo-Universitaire TRANSLAD, CHU Dijon, 21079 Dijon, France
| | - Hana Safraou
- UMR1231 GAD, Inserm-Université Bourgogne-Franche Comté, 21078 Dijon, France.,Unité Fonctionnelle Innovation en Diagnostic génomique des maladies rares, FHU TRANSLAD, CHU Dijon Bourgogne, 21000 Dijon, France
| | - Anne-Sophie Denommé-Pichon
- UMR1231 GAD, Inserm-Université Bourgogne-Franche Comté, 21078 Dijon, France.,Unité Fonctionnelle Innovation en Diagnostic génomique des maladies rares, FHU TRANSLAD, CHU Dijon Bourgogne, 21000 Dijon, France
| | - Marjon A van Slegtenhorst
- Clinical Genetics, Department of Clinical Genetics, Erasmus MC, University Medical Center Rotterdam, 3015 CN, Rotterdam, The Netherlands
| | - Noor Giesbertz
- Department of Genetics, University Medical Centre Utrecht, 3584 CX, Utrecht, The Netherlands
| | - Richard H van Jaarsveld
- Department of Genetics, University Medical Centre Utrecht, 3584 CX, Utrecht, The Netherlands
| | | | | | - Antonio Novelli
- Laboratory of Medical Genetics, IRCCS, Ospedale Pediatrico Bambino Gesù, Rome, Italy
| | - Silvia De Rubeis
- Seaver Autism Center for Research and Treatment, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.,Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.,The Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.,Friedman Brain Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Joseph D Buxbaum
- Seaver Autism Center for Research and Treatment, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.,Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.,The Mindich Child Health and Development Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA.,Department of Neuroscience, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
| | - Stephen W Scherer
- Department of Molecular Genetics, University of Toronto, Toronto, ON M5S 1A8, Canada.,McLaughlin Centre, University of Toronto, Toronto, ON M5S 1A1, Canada
| | | | - Brunhilde Wirth
- Institute of Human Genetics, Center for Molecular Medicine Cologne, Center for Rare Diseases Cologne, University Hospital Cologne, University of Cologne, 50931 Cologne, Germany.,Institute for Genetics, University of Cologne, 50674 Cologne, Germany
| | - Alfredo Brusco
- Department of Medical Sciences, University of Turin, 10126 Turin, Italy.,Medical Genetics Unit, Città della Salute e della Scienza University Hospital, 10126 Turin, Italy
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4
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Using Machine Learning to Explore Shared Genetic Pathways and Possible Endophenotypes in Autism Spectrum Disorder. Genes (Basel) 2023; 14:genes14020313. [PMID: 36833240 PMCID: PMC9956345 DOI: 10.3390/genes14020313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/22/2023] [Accepted: 01/23/2023] [Indexed: 01/27/2023] Open
Abstract
Autism spectrum disorder (ASD) is a heterogeneous condition, characterized by complex genetic architectures and intertwined genetic/environmental interactions. Novel analysis approaches to disentangle its pathophysiology by computing large amounts of data are needed. We present an advanced machine learning technique, based on a clustering analysis on genotypical/phenotypical embedding spaces, to identify biological processes that might act as pathophysiological substrates for ASD. This technique was applied to the VariCarta database, which contained 187,794 variant events retrieved from 15,189 individuals with ASD. Nine clusters of ASD-related genes were identified. The 3 largest clusters included 68.6% of all individuals, consisting of 1455 (38.0%), 841 (21.9%), and 336 (8.7%) persons, respectively. Enrichment analysis was applied to isolate clinically relevant ASD-associated biological processes. Two of the identified clusters were characterized by individuals with an increased presence of variants linked to biological processes and cellular components, such as axon growth and guidance, synaptic membrane components, or transmission. The study also suggested other clusters with possible genotype-phenotype associations. Innovative methodologies, including machine learning, can improve our understanding of the underlying biological processes and gene variant networks that undergo the etiology and pathogenic mechanisms of ASD. Future work to ascertain the reproducibility of the presented methodology is warranted.
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5
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Ueno H, Takahashi Y, Murakami S, Wani K, Miyazaki T, Matsumoto Y, Okamoto M, Ishihara T. Comprehensive behavioral study of C57BL/6.KOR-ApoE shl mice. Transl Neurosci 2023; 14:20220284. [PMID: 37396111 PMCID: PMC10314129 DOI: 10.1515/tnsci-2022-0284] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2022] [Revised: 04/04/2023] [Accepted: 04/05/2023] [Indexed: 07/04/2023] Open
Abstract
Background Apolipoprotein E (ApoE) is associated with Alzheimer's disease (AD) and cognitive dysfunction in elderly individuals. There have been extensive studies on behavioral abnormalities in ApoE-deficient (Apoeshl) mice, which have been described as AD mouse models. Spontaneously hyperlipidemic mice were discovered in 1999 as ApoE-deficient mice due to ApoE gene mutations. However, behavioral abnormalities in commercially available Apoeshl mice remain unclear. Accordingly, we aimed to investigate the behavioral abnormalities of Apoeshl mice. Results Apoeshl mice showed decreased motor skill learning and increased anxiety-like behavior toward heights. Apoeshl mice did not show abnormal behavior in the Y-maze test, open-field test, light/dark transition test, and passive avoidance test. Conclusion Our findings suggest the utility of Apoeshl mice in investigating the function of ApoE in the central nervous system.
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Affiliation(s)
- Hiroshi Ueno
- Department of Medical Technology, Kawasaki University of Medical Welfare, 288, Matsushima, Kurashiki, Okayama, 701-0193, Japan
| | - Yu Takahashi
- Department of Psychiatry, Kawasaki Medical School, Kurashiki, 701-0192, Japan
| | - Shinji Murakami
- Department of Psychiatry, Kawasaki Medical School, Kurashiki, 701-0192, Japan
| | - Kenta Wani
- Department of Psychiatry, Kawasaki Medical School, Kurashiki, 701-0192, Japan
| | - Tetsuji Miyazaki
- Department of Psychiatry, Kawasaki Medical School, Kurashiki, 701-0192, Japan
| | - Yosuke Matsumoto
- Department of Neuropsychiatry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, 700-8558, Japan
| | - Motoi Okamoto
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, Okayama, 700-8558, Japan
| | - Takeshi Ishihara
- Department of Psychiatry, Kawasaki Medical School, Kurashiki, 701-0192, Japan
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6
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Chronic Inhibition of Aggressive Behavior Induces Behavioral Change in Mice. Behav Neurol 2022; 2022:7630779. [PMID: 36619803 PMCID: PMC9815925 DOI: 10.1155/2022/7630779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2022] [Revised: 12/15/2022] [Accepted: 12/16/2022] [Indexed: 12/31/2022] Open
Abstract
Suppression of anger is more common than its expression among Asian individuals. Emotional suppression is considered an unhealthy emotional regulation. Most studies on emotional suppression have concluded that suppression adversely affects social outcomes, with approximately 5% of the world's population suffering from emotional disorders. However, anger suppression has not received academic attention, and details of the effects of chronic anger suppression on the central nervous system remain unclear. In this study, we performed the resident-intruder test to investigate the effect of chronic suppression of aggressive behavior in mice using a behavioral test battery and to clarify whether suppression of this aggressive behavior is stressful for mice. Mice chronically inhibited aggressive behavior and lost weight. Mice with inhibited aggressive behavior showed a reduced percentage of immobility time during the tail suspension test as well as no changes in activity, anxiety-like behavior, muscle strength, or temperature sensitivity. This study provides scientific evidence for the effects of chronic aggressive behavior inhibition on the body and central nervous system.
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7
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Delle Vedove A, Natarajan J, Zanni G, Eckenweiler M, Muiños-Bühl A, Storbeck M, Guillén Boixet J, Barresi S, Pizzi S, Hölker I, Körber F, Franzmann TM, Bertini ES, Kirschner J, Alberti S, Tartaglia M, Wirth B. CAPRIN1 P512L causes aberrant protein aggregation and associates with early-onset ataxia. Cell Mol Life Sci 2022; 79:526. [PMID: 36136249 PMCID: PMC9499908 DOI: 10.1007/s00018-022-04544-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2022] [Revised: 08/15/2022] [Accepted: 08/31/2022] [Indexed: 12/26/2022]
Abstract
CAPRIN1 is a ubiquitously expressed protein, abundant in the brain, where it regulates the transport and translation of mRNAs of genes involved in synaptic plasticity. Here we describe two unrelated children, who developed early-onset ataxia, dysarthria, cognitive decline and muscle weakness. Trio exome sequencing unraveled the identical de novo c.1535C > T (p.Pro512Leu) missense variant in CAPRIN1, affecting a highly conserved residue. In silico analyses predict an increased aggregation propensity of the mutated protein. Indeed, overexpressed CAPRIN1P512L forms insoluble ubiquitinated aggregates, sequestrating proteins associated with neurodegenerative disorders (ATXN2, GEMIN5, SNRNP200 and SNCA). Moreover, the CAPRIN1P512L mutation in isogenic iPSC-derived cortical neurons causes reduced neuronal activity and altered stress granule dynamics. Furthermore, nano-differential scanning fluorimetry reveals that CAPRIN1P512L aggregation is strongly enhanced by RNA in vitro. These findings associate the gain-of-function Pro512Leu mutation to early-onset ataxia and neurodegeneration, unveiling a critical residue of CAPRIN1 and a key role of RNA–protein interactions.
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Affiliation(s)
- Andrea Delle Vedove
- Institute of Human Genetics, University Hospital of Cologne, University Cologne, 50931, Cologne, Germany.,Center for Molecular Medicine Cologne, University of Cologne, 50931, Cologne, Germany.,Institute for Genetics, University of Cologne, 50674, Cologne, Germany
| | - Janani Natarajan
- Center for Molecular and Cellular Bioengineering, Biotechnology Center, Technische Universität Dresden, 01307, Dresden, Germany
| | - Ginevra Zanni
- Genetics and Rare Diseases Research Division and Unit of Muscular and Neurodegenerative Disorders - the Department of Neurosciences of the Bambino Gesù Childrens' Hospital, IRCCS, Rome, Italy
| | - Matthias Eckenweiler
- Department of Neuropediatrics and Muscle Disorders, Faculty of Medicine, Medical Center-University of Freiburg, University of Freiburg, 79106, Freiburg, Germany
| | - Anixa Muiños-Bühl
- Institute of Human Genetics, University Hospital of Cologne, University Cologne, 50931, Cologne, Germany.,Center for Molecular Medicine Cologne, University of Cologne, 50931, Cologne, Germany.,Institute for Genetics, University of Cologne, 50674, Cologne, Germany
| | - Markus Storbeck
- Institute of Human Genetics, University Hospital of Cologne, University Cologne, 50931, Cologne, Germany.,Center for Molecular Medicine Cologne, University of Cologne, 50931, Cologne, Germany.,Institute for Genetics, University of Cologne, 50674, Cologne, Germany
| | - Jordina Guillén Boixet
- Center for Molecular and Cellular Bioengineering, Biotechnology Center, Technische Universität Dresden, 01307, Dresden, Germany
| | - Sabina Barresi
- Genetics and Rare Diseases Research Division and Unit of Muscular and Neurodegenerative Disorders - the Department of Neurosciences of the Bambino Gesù Childrens' Hospital, IRCCS, Rome, Italy
| | - Simone Pizzi
- Genetics and Rare Diseases Research Division and Unit of Muscular and Neurodegenerative Disorders - the Department of Neurosciences of the Bambino Gesù Childrens' Hospital, IRCCS, Rome, Italy
| | - Irmgard Hölker
- Institute of Human Genetics, University Hospital of Cologne, University Cologne, 50931, Cologne, Germany.,Center for Molecular Medicine Cologne, University of Cologne, 50931, Cologne, Germany.,Institute for Genetics, University of Cologne, 50674, Cologne, Germany
| | - Friederike Körber
- Institute of Diagnostic and Interventional Radiology, 50937, Cologne, Germany
| | - Titus M Franzmann
- Center for Molecular and Cellular Bioengineering, Biotechnology Center, Technische Universität Dresden, 01307, Dresden, Germany
| | - Enrico S Bertini
- Genetics and Rare Diseases Research Division and Unit of Muscular and Neurodegenerative Disorders - the Department of Neurosciences of the Bambino Gesù Childrens' Hospital, IRCCS, Rome, Italy
| | - Janbernd Kirschner
- Department of Neuropediatrics and Muscle Disorders, Faculty of Medicine, Medical Center-University of Freiburg, University of Freiburg, 79106, Freiburg, Germany
| | - Simon Alberti
- Center for Molecular and Cellular Bioengineering, Biotechnology Center, Technische Universität Dresden, 01307, Dresden, Germany
| | - Marco Tartaglia
- Genetics and Rare Diseases Research Division and Unit of Muscular and Neurodegenerative Disorders - the Department of Neurosciences of the Bambino Gesù Childrens' Hospital, IRCCS, Rome, Italy
| | - Brunhilde Wirth
- Institute of Human Genetics, University Hospital of Cologne, University Cologne, 50931, Cologne, Germany. .,Center for Molecular Medicine Cologne, University of Cologne, 50931, Cologne, Germany. .,Institute for Genetics, University of Cologne, 50674, Cologne, Germany. .,Center for Rare Diseases, University Hospital of Cologne, 50931, Cologne, Germany.
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8
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Kipper K, Mansour A, Pulk A. Neuronal RNA granules are ribosome complexes stalled at the pre-translocation state. J Mol Biol 2022; 434:167801. [PMID: 36038000 DOI: 10.1016/j.jmb.2022.167801] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2022] [Revised: 06/20/2022] [Accepted: 08/22/2022] [Indexed: 11/30/2022]
Abstract
The polarized cell morphology of neurons dictates many neuronal processes, including the axodendridic transport of specific mRNAs and subsequent translation. mRNAs together with ribosomes and RNA-binding proteins form RNA granules that are targeted to axodendrites for localized translation in neurons. It has been established that localized protein synthesis in neurons is essential for long-term memory formation, synaptic plasticity, and neurodegeneration. We have used proteomics and electron microscopy to characterize neuronal RNA granules (nRNAg) isolated from rat brain tissues or human neuroblastoma. We show that ribosome containing RNA granules are morula-like structures when visualized by electron microscopy. Crosslinking-coupled mass-spectrometry identified potential G3BP2 binding site on the ribosome near the eIF3d-binding site on the 40S ribosomal subunit. We used cryo-EM to resolve the structure of the ribosome-component of nRNAg. The cryo-EM reveals that predominant particles in nRNAg are 80S ribosomes, resembling the pre-translocation state where tRNA's are in the hybrid A/P and P/E site. We also describe a new kind of principal motion of the ribosome, which we call the rocking motion.
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Affiliation(s)
- Kalle Kipper
- Structural Biology Unit, Institute of Technology, University of Tartu, Tartu 50411, Estonia
| | - Abbas Mansour
- Structural Biology Unit, Institute of Technology, University of Tartu, Tartu 50411, Estonia
| | - Arto Pulk
- Structural Biology Unit, Institute of Technology, University of Tartu, Tartu 50411, Estonia.
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9
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Dougnon G, Matsui H. Modelling Autism Spectrum Disorder (ASD) and Attention-Deficit/Hyperactivity Disorder (ADHD) Using Mice and Zebrafish. Int J Mol Sci 2022; 23:ijms23147550. [PMID: 35886894 PMCID: PMC9319972 DOI: 10.3390/ijms23147550] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Revised: 07/01/2022] [Accepted: 07/04/2022] [Indexed: 02/06/2023] Open
Abstract
Autism spectrum disorders (ASD) and attention-deficit/hyperactivity disorder (ADHD) are two debilitating neurodevelopmental disorders. The former is associated with social impairments whereas the latter is associated with inattentiveness, hyperactivity, and impulsivity. There is recent evidence that both disorders are somehow related and that genes may play a large role in these disorders. Despite mounting human and animal research, the neurological pathways underlying ASD and ADHD are still not well understood. Scientists investigate neurodevelopmental disorders by using animal models that have high similarities in genetics and behaviours with humans. Mice have been utilized in neuroscience research as an excellent animal model for a long time; however, the zebrafish has attracted much attention recently, with an increasingly large number of studies using this model. In this review, we first discuss ASD and ADHD aetiology from a general point of view to their characteristics and treatments. We also compare mice and zebrafish for their similarities and discuss their advantages and limitations in neuroscience. Finally, we summarize the most recent and existing research on zebrafish and mouse models of ASD and ADHD. We believe that this review will serve as a unique document providing interesting information to date about these models, thus facilitating research on ASD and ADHD.
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10
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Fernández de Cossío L, Lacabanne C, Bordeleau M, Castino G, Kyriakakis P, Tremblay MÈ. Lipopolysaccharide-induced maternal immune activation modulates microglial CX3CR1 protein expression and morphological phenotype in the hippocampus and dentate gyrus, resulting in cognitive inflexibility during late adolescence. Brain Behav Immun 2021; 97:440-454. [PMID: 34343619 DOI: 10.1016/j.bbi.2021.07.025] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Revised: 07/25/2021] [Accepted: 07/28/2021] [Indexed: 12/26/2022] Open
Abstract
Inflammation during pregnancy can disturb brain development and lead to disorders in the progeny, including autism spectrum disorder and schizophrenia. However, the mechanism by which a prenatal, short-lived increase of cytokines results in adverse neurodevelopmental outcomes remains largely unknown. Microglia-the brain's resident immune-cells-stand as fundamental cellular mediators, being highly sensitive and responsive to immune signals, which also play key roles during normal development. The fractalkine signaling axis is a neuron-microglia communication mechanism used to regulate neurogenesis and network formation. Previously, we showed hippocampal reduction of fractalkine receptor (Cx3cr1) mRNA at postnatal day (P) 15 in male offspring exposed to maternal immune activation induced with lipopolysaccharide (LPS) during late gestation, which was concomitant to an increased dendritic spine density in the dentate gyrus, a neurogenic niche. The current study sought to evaluate the origin and impact of this reduced hippocampal Cx3cr1 mRNA expression on microglia and cognition. We found that microglial total cell number and density are not affected in the dorsal hippocampus and dentate gyrus, respectively, but that the microglial CX3CR1 protein is decreased in the hippocampus of LPS-male offspring at P15. Further characterization of microglial morphology in the dentate gyrus identified a more ameboid phenotype in LPS-exposed offspring, predominantly in males, at P15. We thus explored maternal plasma and fetal brain cytokines to understand the mechanism behind microglial priming, showing a robust immune activation in the mother at 2 and 4 hrs after LPS administration, while only IL-10 tended towards upregulation at 2 hrs after LPS in fetal brains. To evaluate the functional long-term consequences, we assessed learning and cognitive flexibility behavior during late adolescence, finding that LPS affects only the latter with a male predominance on perseveration. A CX3CR1 gene variant in humans that results in disrupted fractalkine signaling has been recently associated with an increased risk for neurodevelopmental disorders. We show that an acute immune insult during late gestation can alter fractalkine signaling by reducing the microglial CX3CR1 protein expression, highlighting neuron-microglial fractalkine signaling as a relevant target underlying the outcomes of environmental risk factors on neurodevelopmental disorders.
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Affiliation(s)
- Lourdes Fernández de Cossío
- Department of Neurosciences, University of California, La Jolla, CA, USA; Integrated Program in Neuroscience, McGill University, Montreal, QC, Canada.
| | - Chloé Lacabanne
- Integrated Program in Neuroscience, McGill University, Montreal, QC, Canada
| | - Maude Bordeleau
- Integrated Program in Neuroscience, McGill University, Montreal, QC, Canada; Axe Neurosciences, Centre de Recherche du CHU de Québec - Université Laval, Québec, QC, Canada
| | - Garance Castino
- Department of Biology, École Normale Supérieure de Lyon, Université de Lyon, Lyon, France
| | | | - Marie-Ève Tremblay
- Axe Neurosciences, Centre de Recherche du CHU de Québec - Université Laval, Québec, QC, Canada; Département de médecine moléculaire, Université Laval, Québec, QC, Canada; Department of Neurology and Neurosurgery, McGill University, Montréal, QC, Canada; Division of Medical Sciences, University of Victoria, Victoria, BC, Canada; Biochemistry and Molecular Biology, Faculty of Medicine, The University of British Colombia, Vancouver, BC, Canada.
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11
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Ueda D, Yonemochi N, Kamata T, Shibasaki M, Kamei J, Waddington JL, Ikeda H. Increase in neuropeptide Y activity impairs social behaviour in association with glutamatergic dysregulation in diabetic mice. Br J Pharmacol 2020; 178:726-740. [PMID: 33197050 DOI: 10.1111/bph.15326] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2020] [Revised: 10/27/2020] [Accepted: 10/29/2020] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND AND PURPOSE Patients with diabetes mellitus are reported to show a raised prevalence of mental disorders, which may be reflected in impaired social interaction. However, the mechanisms underlying such impairment in diabetes are unknown. EXPERIMENTAL APPROACH The present study investigated whether social interaction is impaired in diabetic mice and whether central neuropeptide Y (NPY) and glutamatergic function are involved in such impairment. KEY RESULTS In the three-chamber test, social novelty preference, but not sociability, was impaired in streptozotocin (STZ)-induced diabetic mice. The mRNA level of NPY in the hypothalamus was increased in STZ-induced diabetic mice. Injection of the NPY Y2 receptor agonist NPY 13-36 into naïve mice impaired social novelty preference, but not sociability, and this effect was inhibited by the Y2 receptor antagonist BIIE 0246. BIIE 0246 also reversed the impairment of social novelty preference in STZ-induced diabetic mice. Similarly, injection of the AMPA receptor agonist AMPA into naïve mice impaired social novelty preference, but not sociability, and this effect was inhibited by the AMPA receptor antagonist NBQX. Impairment of social novelty preference induced by NPY 13-36 was inhibited by NBQX, whereas impairment of social novelty preference induced by AMPA was not inhibited by BIIE 0246. Finally, impairment of social novelty preference in STZ-induced diabetic mice was reversed by NBQX. CONCLUSION AND IMPLICATIONS These findings suggest that NPY neurons are activated in diabetic mice and that this may impair social novelty preference by promoting glutamatergic function through Y2 receptors.
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Affiliation(s)
- Daiki Ueda
- Department of Pathophysiology and Therapeutics, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - Naomi Yonemochi
- Department of Pathophysiology and Therapeutics, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - Tomohiro Kamata
- Department of Pathophysiology and Therapeutics, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - Masahiro Shibasaki
- Department of Pathophysiology and Therapeutics, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - Junzo Kamei
- Department of Biomolecular Pharmacology, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
| | - John L Waddington
- School of Pharmacy and Biomolecular Sciences, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Hiroko Ikeda
- Department of Pathophysiology and Therapeutics, Hoshi University School of Pharmacy and Pharmaceutical Sciences, Tokyo, Japan
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12
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Ueno H, Shimada A, Suemitsu S, Murakami S, Kitamura N, Wani K, Takahashi Y, Matsumoto Y, Okamoto M, Ishihara T. Increased anxiety-related behavior in mice following β-citronellol inhalation. Libyan J Med 2020; 15:1767275. [PMID: 32475228 PMCID: PMC7646537 DOI: 10.1080/19932820.2020.1767275] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 03/27/2020] [Indexed: 12/14/2022] Open
Abstract
β-Citronellol is a monoterpene alcohol found in essential oils of various aromatic plant species. The physiological effects of β-citronellol inhalation on the central nervous system remain unclear. We investigated the effects of β-citronellol inhalation on mouse behavior. First, we examined whether the odor of β-citronellol was attractive or repellent to mice. Then, following 30 minutes of β-citronellol inhalation, a series of behavioral tests (elevated plus maze, open field, Y-maze, tail suspension, and forced swim tests) were performed. Mice were neither attracted to nor repelled by β-citronellol. Mice that inhaled β-citronellol showed an increase in anxiety-like behavior in the elevated plus maze and open field tests. Performance in the Y-maze and forced swim tests was not affected. These results indicate that β-citronellol acts on the central nervous system of mice following inhalation and increases anxiety. Essential oils and cosmetics containing β-citronellol should be used with caution.
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Affiliation(s)
- Hiroshi Ueno
- Department of Medical Technology, Kawasaki University of Medical Welfare, Okayama, Japan
| | - Atsumi Shimada
- Division of Food and Nutrition, Nakamura Gakuen University Junior College, Fukuoka, Japan
| | | | - Shinji Murakami
- Department of Psychiatry, Kawasaki Medical School, Okayama, Japan
| | - Naoya Kitamura
- Department of Psychiatry, Kawasaki Medical School, Okayama, Japan
| | - Kenta Wani
- Department of Psychiatry, Kawasaki Medical School, Okayama, Japan
| | - Yu Takahashi
- Department of Psychiatry, Kawasaki Medical School, Okayama, Japan
| | - Yosuke Matsumoto
- Department of Neuropsychiatry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, Japan
| | - Motoi Okamoto
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, Okayama, Japan
| | - Takeshi Ishihara
- Department of Psychiatry, Kawasaki Medical School, Okayama, Japan
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Ueno H, Shimada A, Suemitsu S, Murakami S, Kitamura N, Wani K, Takahashi Y, Matsumoto Y, Okamoto M, Ishihara T. Hexanal inhalation affects cognition and anxiety-like behavior in mice. Z NATURFORSCH C 2020; 75:409-415. [PMID: 32589610 DOI: 10.1515/znc-2019-0215] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Accepted: 05/26/2020] [Indexed: 12/27/2022]
Abstract
Hexanal is a 6-carbon aldehyde that smells like green leaves and urine to mammals. However, its physiological effects remain unclear. In particular, the effects of hexanal inhalation on the central nervous system have not been clarified. We investigated hexanal inhalation in mice and conducted a series of behavioral experiments to examine the neuropsychological effects of hexanal. After inhaling hexanal emissions for 30 min, mice were subjected to an open field test, a hot plate test, a grip strength test, an elevated plus maze test, a Y-maze test, a tail suspension test, and a forced swim test to examine the effects of hexanal odor on mouse behavior. Compared to controls, mice that inhaled hexanal exhibited reduced anxiety-like behavior in the elevated plus maze test. In addition, mice that inhaled hexanal displayed significantly improved spatial cognitive ability in the Y-maze test. However, in some behavioral experiments there was no significant difference between control mice and mice that inhaled hexanal. The results of this study suggest that hexanal inhalation causes anxiolytic effects and improves cognitive function in mice. These findings may have implications for safety management procedures and determining the effective use of household goods containing hexanal, though further work is required.
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Affiliation(s)
- Hiroshi Ueno
- Department of Medical Technology, Kawasaki University of Medical Welfare, Okayama, 701-0193, Japan
| | - Atsumi Shimada
- Division of Food and Nutrition, Nakamura Gakuen University Junior College, Fukuoka, 814-0198, Japan
| | - Shunsuke Suemitsu
- Department of Psychiatry, Kawasaki Medical School, Okayama, 701-0192, Japan
| | - Shinji Murakami
- Department of Psychiatry, Kawasaki Medical School, Okayama, 701-0192, Japan
| | - Naoya Kitamura
- Department of Psychiatry, Kawasaki Medical School, Okayama, 701-0192, Japan
| | - Kenta Wani
- Department of Psychiatry, Kawasaki Medical School, Okayama, 701-0192, Japan
| | - Yu Takahashi
- Department of Psychiatry, Kawasaki Medical School, Okayama, 701-0192, Japan
| | - Yosuke Matsumoto
- Department of Neuropsychiatry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, 700-8558, Japan
| | - Motoi Okamoto
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, Okayama, Japan
| | - Takeshi Ishihara
- Department of Psychiatry, Kawasaki Medical School, Okayama, 701-0192, Japan
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14
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Abstract
It is increasingly recognized that local protein synthesis (LPS) contributes to fundamental aspects of axon biology, in both developing and mature neurons. Mutations in RNA-binding proteins (RBPs), as central players in LPS, and other proteins affecting RNA localization and translation are associated with a range of neurological disorders, suggesting disruption of LPS may be of pathological significance. In this review, we substantiate this hypothesis by examining the link between LPS and key axonal processes, and the implicated pathophysiological consequences of dysregulated LPS. First, we describe how the length and autonomy of axons result in an exceptional reliance on LPS. We next discuss the roles of LPS in maintaining axonal structural and functional polarity and axonal trafficking. We then consider how LPS facilitates the establishment of neuronal connectivity through regulation of axonal branching and pruning, how it mediates axonal survival into adulthood and its involvement in neuronal stress responses.
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Affiliation(s)
- Julie Qiaojin Lin
- UK Dementia Research Institute at University of Cambridge, Department of Clinical Neurosciences, Island Research Building, Cambridge Biomedical Campus, Cambridge, UK
| | | | - Christine E Holt
- Department of Physiology, Development and Neuroscience, University of Cambridge, Cambridge, UK
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15
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Nakazawa K, Shichino Y, Iwasaki S, Shiina N. Implications of RNG140 (caprin2)-mediated translational regulation in eye lens differentiation. J Biol Chem 2020; 295:15029-15044. [PMID: 32839273 DOI: 10.1074/jbc.ra120.012715] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2020] [Revised: 08/07/2020] [Indexed: 01/02/2023] Open
Abstract
Regulation of gene expression at the translational level is key to determining cell fate and function. An RNA-binding protein, RNG140 (caprin2), plays a role in eye lens differentiation and has been reported to function in translational regulation. However, the mechanism and its role in eyes has remained unclear. Here, we show that RNG140 binds to the translation initiation factor eukaryotic initiation factor 3 (eIF3) and suppresses translation through mechanisms involving suppression of eIF3-dependent translation initiation. Comprehensive ribosome profiling revealed that overexpression of RNG140 in cultured Chinese hamster ovary cells reduces translation of long mRNAs, including those associated with cell proliferation. RNG140-mediated translational regulation also operates in the mouse eye, where RNG140 knockout increased the translation of long mRNAs. mRNAs involved in lens differentiation, such as crystallin mRNAs, are short and can escape translational inhibition by RNG140 and be translated in differentiating lenses. Thus, this study provides insights into the mechanistic basis of lens cell transition from proliferation to differentiation via RNG140-mediated translational regulation.
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Affiliation(s)
- Kaori Nakazawa
- Laboratory of Neuronal Cell Biology, National Institute for Basic Biology, Okazaki, Aichi, Japan; Department of Basic Biology, SOKENDAI (Graduate University for Advanced Studies), Okazaki, Aichi, Japan
| | - Yuichi Shichino
- RNA Systems Biochemistry Laboratory, RIKEN Cluster for Pioneering Research, Saitama, Japan
| | - Shintaro Iwasaki
- RNA Systems Biochemistry Laboratory, RIKEN Cluster for Pioneering Research, Saitama, Japan; Department of Computational Biology and Medical Sciences, Graduate School of Frontier Sciences, University of Tokyo, Chiba, Japan
| | - Nobuyuki Shiina
- Laboratory of Neuronal Cell Biology, National Institute for Basic Biology, Okazaki, Aichi, Japan; Department of Basic Biology, SOKENDAI (Graduate University for Advanced Studies), Okazaki, Aichi, Japan; Exploratory Research Center on Life and Living Systems (ExCELLS), Okazaki, Aichi, Japan.
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16
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Bowers MS, Cacheaux LP, Sahu SU, Schmidt ME, Sennello JA, Leaderbrand K, Khan MA, Kroes RA, Moskal JR. NYX-2925 induces metabotropic N-methyl-d-aspartate receptor (NMDAR) signaling that enhances synaptic NMDAR and α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor. J Neurochem 2020; 152:523-541. [PMID: 31376158 PMCID: PMC7065110 DOI: 10.1111/jnc.14845] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2018] [Revised: 07/05/2019] [Accepted: 07/08/2019] [Indexed: 12/18/2022]
Abstract
N-methyl-d-aspartate receptors (NMDARs) mediate both physiological and pathophysiological processes, although selective ligands lack broad clinical utility. NMDARs are composed of multiple subunits, but N-methyl-d-aspartate receptor subunit 2 (GluN2) is predominately responsible for functional heterogeneity. Specifically, the GluN2A- and GluN2B-containing subtypes are enriched in adult hippocampus and cortex and impact neuronal communication via dynamic trafficking into and out of the synapse. We sought to understand if ((2S, 3R)-3-hydroxy-2-((R)-5-isobutyryl-1-oxo-2,5-diazaspiro[3,4]octan-2-yl) butanamide (NYX-2925), a novel NMDAR modulator, alters synaptic levels of GluN2A- or GluN2B-containing NMDARs. Low-picomolar NYX-2925 increased GluN2B colocalization with the excitatory post-synaptic marker post-synaptic density protein 95 (PSD-95) in rat primary hippocampal neurons within 30 min. Twenty-four hours following oral administration, 1 mg/kg NYX-2925 increased GluN2B in PSD-95-associated complexes ex vivo, and low-picomolar NYX-2925 regulated numerous trafficking pathways in vitro. Because the NYX-2925 concentration that increases synaptic GluN2B was markedly below that which enhances long-term potentiation (mid-nanomolar), we sought to elucidate the basis of this effect. Although NMDAR-dependent, NYX-2925-mediated colocalization of GluN2B with PSD-95 occurred independent of ion flux, as colocalization increased in the presence of either the NMDAR channel blocker (5R,10S)-(-)-5-Methyl-10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5,10-imine hydrogen maleate or glycine site antagonist 7-chlorokynurenic acid. Moreover, while mid-nanomolar NYX-2925 concentrations, which do not increase synaptic GluN2B, enhanced calcium transients, functional plasticity was only enhanced by picomolar NYX-2925. Thus, NYX-2925 concentrations that increase synaptic GluN2B facilitated the chemical long-term potentiation induced insertion of synaptic α-amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid receptor GluA1 subunit levels. Basal (unstimulated by chemical long-term potentiation) levels of synaptic GluA1 were only increased by mid-nanomolar NYX-2925. These data suggest that NYX-2925 facilitates homeostatic plasticity by initially increasing synaptic GluN2B via metabotropic-like NMDAR signaling. Cover Image for this issue: doi: 10.1111/jnc.14735.
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Affiliation(s)
- M. Scott Bowers
- Falk Center for Molecular Therapeutics, Biomedical EngineeringNorthwestern UniversityEvanstonIllinoisUSA
- Aptinyx, Inc.EvanstonIllinoisUSA
| | | | - Srishti U. Sahu
- Falk Center for Molecular Therapeutics, Biomedical EngineeringNorthwestern UniversityEvanstonIllinoisUSA
| | | | | | | | | | - Roger A. Kroes
- Falk Center for Molecular Therapeutics, Biomedical EngineeringNorthwestern UniversityEvanstonIllinoisUSA
- Aptinyx, Inc.EvanstonIllinoisUSA
| | - Joseph R. Moskal
- Falk Center for Molecular Therapeutics, Biomedical EngineeringNorthwestern UniversityEvanstonIllinoisUSA
- Aptinyx, Inc.EvanstonIllinoisUSA
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17
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Ueno H, Takahashi Y, Suemitsu S, Murakami S, Kitamura N, Wani K, Matsumoto Y, Okamoto M, Ishihara T. Effects of repetitive gentle handling of male C57BL/6NCrl mice on comparative behavioural test results. Sci Rep 2020; 10:3509. [PMID: 32103098 PMCID: PMC7044437 DOI: 10.1038/s41598-020-60530-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2020] [Accepted: 02/05/2020] [Indexed: 02/08/2023] Open
Abstract
Mice are the most commonly used laboratory animals for studying diseases, behaviour, and pharmacology. Behavioural experiment battery aids in evaluating abnormal behaviour in mice. During behavioural experiments, mice frequently experience human contact. However, the effects of repeated handling on mice behaviour remains unclear. To minimise mice stress, methods of moving mice using transparent tunnels or cups have been recommended but are impractical in behavioural tests. To investigate these effects, we used a behavioural test battery to assess differences between mice accustomed to the experimenter’s handling versus control mice. Repeatedly handled mice gained slightly more weight than control mice. In behavioural tests, repeatedly handled mice showed improved spatial cognition in the Y-maze test and reduced anxiety-like behaviour in the elevated plus-maze test. However, there was no change in anxiety-like behaviour in the light/dark transition test or open-field test. Grip strength, rotarod, sociability, tail suspension, Porsolt forced swim, and passive avoidance tests revealed no significant differences between repeatedly handled and control mice. Our findings demonstrated that mice repeatedly handled by the experimenter before behavioural tests showed reduced anxiety about high altitudes and improved spatial cognition, suggesting that repeated contact can affect the results of some behavioural tests.
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Affiliation(s)
- Hiroshi Ueno
- Department of Medical Technology, Kawasaki University of Medical Welfare, Okayama, 701-0193, Japan.
| | - Yu Takahashi
- Department of Psychiatry, Kawasaki Medical School, Okayama, 701-0192, Japan
| | - Shunsuke Suemitsu
- Department of Psychiatry, Kawasaki Medical School, Okayama, 701-0192, Japan
| | - Shinji Murakami
- Department of Psychiatry, Kawasaki Medical School, Okayama, 701-0192, Japan
| | - Naoya Kitamura
- Department of Psychiatry, Kawasaki Medical School, Okayama, 701-0192, Japan
| | - Kenta Wani
- Department of Psychiatry, Kawasaki Medical School, Okayama, 701-0192, Japan
| | - Yosuke Matsumoto
- Department of Neuropsychiatry, Graduate School of Medicine, Dentistry and Pharmaceutical Sciences, Okayama University, Okayama, 700-8558, Japan
| | - Motoi Okamoto
- Department of Medical Technology, Graduate School of Health Sciences, Okayama University, Okayama, 700-8558, Japan
| | - Takeshi Ishihara
- Department of Psychiatry, Kawasaki Medical School, Okayama, 701-0192, Japan
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Cataloguing and Selection of mRNAs Localized to Dendrites in Neurons and Regulated by RNA-Binding Proteins in RNA Granules. Biomolecules 2020; 10:biom10020167. [PMID: 31978946 PMCID: PMC7072219 DOI: 10.3390/biom10020167] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/18/2020] [Accepted: 01/20/2020] [Indexed: 12/15/2022] Open
Abstract
Spatiotemporal translational regulation plays a key role in determining cell fate and function. Specifically, in neurons, local translation in dendrites is essential for synaptic plasticity and long-term memory formation. To achieve local translation, RNA-binding proteins in RNA granules regulate target mRNA stability, localization, and translation. To date, mRNAs localized to dendrites have been identified by comprehensive analyses. In addition, mRNAs associated with and regulated by RNA-binding proteins have been identified using various methods in many studies. However, the results obtained from these numerous studies have not been compiled together. In this review, we have catalogued mRNAs that are localized to dendrites and are associated with and regulated by the RNA-binding proteins fragile X mental retardation protein (FMRP), RNA granule protein 105 (RNG105, also known as Caprin1), Ras-GAP SH3 domain binding protein (G3BP), cytoplasmic polyadenylation element binding protein 1 (CPEB1), and staufen double-stranded RNA binding proteins 1 and 2 (Stau1 and Stau2) in RNA granules. This review provides comprehensive information on dendritic mRNAs, the neuronal functions of mRNA-encoded proteins, the association of dendritic mRNAs with RNA-binding proteins in RNA granules, and the effects of RNA-binding proteins on mRNA regulation. These findings provide insights into the mechanistic basis of protein-synthesis-dependent synaptic plasticity and memory formation and contribute to future efforts to understand the physiological implications of local regulation of dendritic mRNAs in neurons.
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19
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Roy R, Shiina N, Wang DO. More dynamic, more quantitative, unexpectedly intricate: Advanced understanding on synaptic RNA localization in learning and memory. Neurobiol Learn Mem 2019; 168:107149. [PMID: 31881355 DOI: 10.1016/j.nlm.2019.107149] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Revised: 10/25/2019] [Accepted: 12/23/2019] [Indexed: 01/13/2023]
Abstract
Synaptic signaling exhibits great diversity, complexity, and plasticity which necessitates maintenance and rapid modification of a local proteome. One solution neurons actively exploit to meet such demands is the strategic deposition of mRNAs encoding proteins for both basal and experience-driven activities into ribonucleoprotein complexes at the synapse. Transcripts localized in this manner can be rapidly accessed for translation in response to a diverse range of stimuli in a temporal- and spatially-restricted manner. Here we review recent findings on localized RNAs and RNA binding proteins in the context of learning and memory, as revealed by cutting-edge in-vitro and in-vivo technologies capable of yielding quantitative and dynamic information. The new technologies include proteomic and transcriptomic analyses, high-resolution multiplexed RNA imaging, single-molecule RNA tracking in living neurons, animal models and human neuron cell models. Among many recent advances in the field, RNA chemical modification has emerged as one of the new regulatory layers of gene expression at synapse that is complex and yet largely unexplored. These exciting new discoveries have enhanced our understanding of the modulation mechanisms of synaptic gene expression and their roles in cognition.
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Affiliation(s)
- Rohini Roy
- Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Kyoto, Japan; Graduate School of Biostudies, Kyoto University, Kyoto, Japan
| | - Nobuyuki Shiina
- Laboratory of Neuronal Cell Biology, National Institute for Basic Biology, Okazaki, Japan; Department of Basic Biology, SOKENDAI, Okazaki, Japan; Exploratory Research Center on Life and Living Systems, Okazaki, Japan.
| | - Dan Ohtan Wang
- Wuya College of Innovation, Shenyang Pharmaceutical University, Liaoning, China; Institute for Integrated Cell-Material Sciences (iCeMS), Kyoto University, Kyoto, Japan; The Keihanshin Consortium for Fostering the Next Generation of Global Leaders in Research (K-CONNEX), Kyoto University, Kyoto, Japan.
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20
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Du Y, Li Z, Liu Z, Zhang N, Wang R, Li F, Zhang T, Jiang Y, Zhi X, Wang Z, Wu J. Nonrandom occurrence of multiple de novo coding variants in a
proband indicates the existence of an oligogenic model in autism. Genet Med 2019; 22:170-180. [DOI: 10.1038/s41436-019-0610-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2019] [Accepted: 07/03/2019] [Indexed: 01/01/2023] Open
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21
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Comprehensive behavioral study of the effects of vanillin inhalation in mice. Biomed Pharmacother 2019; 115:108879. [PMID: 31035009 DOI: 10.1016/j.biopha.2019.108879] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 03/27/2019] [Accepted: 04/11/2019] [Indexed: 01/16/2023] Open
Abstract
Vanillin is widely used in food and cosmetics, among other substances, for its sweet smell. However, the neuropsychological effects of vanillin inhalation have not been elucidated. In this study, we investigated the effect of vanillin inhalation on mouse behavior. First, we investigated whether the aroma of vanillin was attractive or repulsive for mice. Thereafter, the mice inhaled vanillin for 20 min before each test in a series of behavioral tests (elevated plus maze, open field, Y-maze, tail suspension, cotton bud biting, and Porsolt forced swim tests). In these tests, the mice showed a neutral response to vanillin. Mice that inhaled vanillin had a suppressed pain response in the hot plate test. In addition, the grip strength of the forelimbs of mice that inhaled vanillin was decreased. No significant differences were found between the mice inhaling vanillin and control mice in the open field, Y-maze, tail suspension, forced swimming, and aggression tests. These results show that vanillin inhalation has anti-nociceptive effects, similar to other routes of administration. The results also show that vanillin inhalation does not cause significant behavioral effects.
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22
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Hattori S, Okumura Y, Takao K, Yamaguchi Y, Miyakawa T. Open source code for behavior analysis in rodents. Neuropsychopharmacol Rep 2019; 39:67-69. [PMID: 30659767 PMCID: PMC7292282 DOI: 10.1002/npr2.12047] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2018] [Revised: 12/13/2018] [Accepted: 12/14/2018] [Indexed: 11/16/2022] Open
Abstract
Aim We have conducted a series of behavioral tests, which cover a broad range of behavioral domains, on various strains of genetically engineered mice. For the behavioral screening, we have been using Image J plugins that we developed for most of the tests in the battery. Our behavioral analysis system with the plugins enables systematic and automated image analysis of behavior. The plugins are freely available on the “Mouse Phenotype Database” website (http://www.mouse-phenotype.org/software.html). Here, we release the source code of the plugins in a Git repository with the aim of promoting their use and expanding their functionality. Methods We published the source code of the Image J plugins for behavioral analysis at Git repository (https://github.com/neuroinformatics). The source code for light/dark transition, elevated plus maze, open filed, T‐maze, and fear conditioning tests was made publicly available in the repository. Conclusions The source code of the plugins for the behavioral tests as well as the pre‐compiled binaries can be freely obtained. The open source code could promote the development and modification of the plugins for additional behavioral indices in these tests and for other behavioral tests. We developed the Image J plugins for behavioral analysis, and the pre‐compiled plugins are freely available on the website of “Mouse Phenotype Database.” Here, we released the source code of the plugins in the Git repository.
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Affiliation(s)
- Satoko Hattori
- Division of Systems Medical Science, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, Japan
| | - Yoshihiro Okumura
- Neuroinformatics Unit, Integrative Computational Brain Science Collaboration Center, RIKEN Center for Brain Science, Wako, Japan
| | - Keizo Takao
- Division of Animal Resources and Development, Life Science Research Center, University of Toyama, Toyama, Japan
| | - Yoko Yamaguchi
- Neuroinformatics Unit, Integrative Computational Brain Science Collaboration Center, RIKEN Center for Brain Science, Wako, Japan
| | - Tsuyoshi Miyakawa
- Division of Systems Medical Science, Institute for Comprehensive Medical Science, Fujita Health University, Toyoake, Japan
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23
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Fujii K, Koshidaka Y, Adachi M, Takao K. Effects of chronic fentanyl administration on behavioral characteristics of mice. Neuropsychopharmacol Rep 2018; 39:17-35. [PMID: 30506634 PMCID: PMC7292323 DOI: 10.1002/npr2.12040] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Revised: 10/10/2018] [Accepted: 10/19/2018] [Indexed: 01/16/2023] Open
Abstract
Background Fentanyl, a synthetic opioid categorized as a narcotic analgesic, has a 100‐ to 200‐fold stronger effect than most opioids, such as morphine. Fatal accidents due to chronic use and abuse of fentanyl are a worldwide social problem. One reason for the abuse of fentanyl is its psychostimulant effects that could induce behavioral changes. The effects of chronic fentanyl administration on behavior, however, are unclear. Methods Adult male C57BL/6J mice were chronically administered fentanyl (0.03 or 0.3 mg/kg/d i.p.), and various behaviors were assessed using a behavioral test battery. Results Mice chronically administered a high dose of fentanyl (0.3 mg/kg/d) exhibited decreased anxiety‐like behavior as assessed by the open field and elevated plus maze tests. On the other hand, interruption of fentanyl administration led to increased anxiety‐like behavior as observed in the light and dark transition test. The hot plate test revealed that chronic administration of fentanyl reduced pain sensitivity. High‐dose chronic fentanyl administration reduced the locomotor stimulatory effects of cocaine. The results, however, failed to reach the threshold for study‐wide statistical significance. Conclusion Chronic fentanyl administration induces some behavioral changes in mice. Although further studies are needed to clarify the underlying mechanisms of the behavioral effects of chronic fentanyl administration, our findings suggest that fentanyl is safe under properly controlled conditions. To investigate the effects of long‐term fentanyl use on brain function, adult male C57BL/6J mice were chronically administered fentanyl (0.03 or 0.3 mg/kg/d ip) and analyzed in a behavioral test battery. Chronic fentanyl administration reduced anxiety‐like behavior, pain sensitivity, and the locomotor stimulatory effects of cocaine in mice. The results, however, failed to reach the threshold for study‐wide statistical significance.![]()
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Affiliation(s)
- Kazuki Fujii
- Department of Behavioral Physiology, Graduate School of Innovative Life Science, University of Toyama, Toyama, Japan.,Life Science Research Center, University of Toyama, Toyama, Japan
| | - Yumie Koshidaka
- Life Science Research Center, University of Toyama, Toyama, Japan
| | - Mayumi Adachi
- Life Science Research Center, University of Toyama, Toyama, Japan
| | - Keizo Takao
- Department of Behavioral Physiology, Graduate School of Innovative Life Science, University of Toyama, Toyama, Japan.,Life Science Research Center, University of Toyama, Toyama, Japan
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24
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Chen YC, Chang YW, Huang YS. Dysregulated Translation in Neurodevelopmental Disorders: An Overview of Autism-Risk Genes Involved in Translation. Dev Neurobiol 2018; 79:60-74. [PMID: 30430754 DOI: 10.1002/dneu.22653] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 09/17/2018] [Accepted: 10/25/2018] [Indexed: 01/08/2023]
Abstract
Regulated local translation-whereby specific mRNAs are transported and localized in subcellular domains where they are translated in response to regional signals-allows for remote control of gene expression to concentrate proteins in subcellular compartments. Neurons are highly polarized cells with unique features favoring local control for axonal pathfinding and synaptic plasticity, which are key processes involved in constructing functional circuits in the developing brain. Neurodevelopmental disorders are caused by genetic or environmental factors that disturb the nervous system's development during prenatal and early childhood periods. The growing list of genetic mutations that affect mRNA translation raises the question of whether aberrant translatomes in individuals with neurodevelopmental disorders share common molecular features underlying their stereotypical phenotypes and, vice versa, cause a certain degree of phenotypic heterogeneity. Here, we briefly give an overview of the role of local translation during neuronal development. We take the autism-risk gene list and discuss the molecules that (perhaps) are involved in mRNA transport and translation. Both exaggerated and suppressed translation caused by mutations in those genes have been identified or suggested. Finally, we discuss some proof-of-principle regimens for use in autism mouse models to correct dysregulated translation.
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Affiliation(s)
- Yan-Chu Chen
- Institute of Biomedical Sciences, Academia Sinica, Taipei, 11529, Taiwan
| | - Yu-Wei Chang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, 11529, Taiwan
| | - Yi-Shuian Huang
- Institute of Biomedical Sciences, Academia Sinica, Taipei, 11529, Taiwan
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25
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Anti-depressive-like effect of 2-phenylethanol inhalation in mice. Biomed Pharmacother 2018; 111:1499-1506. [PMID: 30415864 DOI: 10.1016/j.biopha.2018.10.073] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 10/12/2018] [Accepted: 10/12/2018] [Indexed: 01/30/2023] Open
Abstract
Rose oil has traditionally been used to treat psychiatric disorders, but the scientific basis of this treatment remains poorly understood. The main odor component of rose oil is 2-phenylethanol (2-PE), but the neuropsychological effects of 2-PE have not been investigated in detail. Thus, we aimed to investigate the effects of 2-PE on mouse behavior. We first investigated whether 2-PE is attractive or repulsive to mice. After 2-PE inhalation, the mice underwent a series of behavioral experiments, such as the elevated plus maze, open field, Y-maze, tail-suspension, and Porsolt forced-swim tests. Mice did not have a strong interest in 2-PE but were not repelled by it nor were fearful. In the open field test, mice that had inhaled 2-PE spent less time in the center area, while in the tail suspension test, their immobility time decreased. There was no change in cognitive function, activity level, muscle strength, or aggression in these mice. Our results suggest that 2-PE elicits neuropsychological effects that alter the behavior of mice and may also elicit anti-depressive effects. Inhalation of rose oil containing 2-PE may be effective against depression and stress-related diseases.
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26
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Nakayama K, Ohashi R, Shinoda Y, Yamazaki M, Abe M, Fujikawa A, Shigenobu S, Futatsugi A, Noda M, Mikoshiba K, Furuichi T, Sakimura K, Shiina N. RNG105/caprin1, an RNA granule protein for dendritic mRNA localization, is essential for long-term memory formation. eLife 2017; 6. [PMID: 29157358 PMCID: PMC5697933 DOI: 10.7554/elife.29677] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2017] [Accepted: 10/22/2017] [Indexed: 12/18/2022] Open
Abstract
Local regulation of synaptic efficacy is thought to be important for proper networking of neurons and memory formation. Dysregulation of global translation influences long-term memory in mice, but the relevance of the regulation specific for local translation by RNA granules remains elusive. Here, we demonstrate roles of RNG105/caprin1 in long-term memory formation. RNG105 deletion in mice impaired synaptic strength and structural plasticity in hippocampal neurons. Furthermore, RNG105-deficient mice displayed unprecedentedly severe defects in long-term memory formation in spatial and contextual learning tasks. Genome-wide profiling of mRNA distribution in the hippocampus revealed an underlying mechanism: RNG105 deficiency impaired the asymmetric somato-dendritic localization of mRNAs. Particularly, RNG105 deficiency reduced the dendritic localization of mRNAs encoding regulators of AMPAR surface expression, which was consistent with attenuated homeostatic AMPAR scaling in dendrites and reduced synaptic strength. Thus, RNG105 has an essential role, as a key regulator of dendritic mRNA localization, in long-term memory formation. Messages pass from one nerve cell to the next across gaps called synapses. The first neuron releases chemical signals from the end of its long, thin nerve fiber. The second receives the message at receptors on branching structures known as dendrites. Each connection has a corresponding bump called a dendritic spine. As animals learn, these can grow larger, strengthening the connection. This is the basis of how memories form. To strengthen a synapse, the cell must transport the materials to the dendritic spine. The cell makes copies of the genetic instructions to strengthen the synapse in the form of messenger RNA (often shortened to mRNA). But, this happens in the body of the cell, a long way from the dendrites themselves. The mRNA travels from the cell body to the dendrites in collections of molecules referred to as ‘RNA granules’. One of the key components of the RNA granule system is a protein called RNG105/caprin1. Now, Nakayama, Ohashi et al. have engineered mice to delete the gene for RNG105/caprin1, revealing its effect on memory. Mice lacking RNG105/caprin1 struggled to make long-term memories. Unlike their normal counterparts, these mutant mice did not become accustomed to new environments or objects. They also found it more challenging to learn the position of a hidden platform in a water-based maze. Lastly, over time, the mutant mice forgot to be fearful of a dark chamber where they had received a small electric shock. Memories form in a part of the brain called the hippocampus and the dendritic spines in this region were smaller in mice lacking RNG105/caprin1. Furthermore, when the nerve cells from this part of the brain were grown in Petri dishes, they did not respond normally to stimulation. The dendritic spines of normal cells increased in size, but those on the cells lacking RNG105/caprin1 got smaller compared to normal cells. A closer look revealed that the distribution of mRNA in brain cells from mice lacking RNG105/caprin1 differed from that of normal mice. Some pieces of genetic information failed to make it from the cell body to the dendrites. This included mRNA involved in making regulators of a component of dendritic spines called the AMPA receptor. The AMPA receptor detects the chemical messenger, glutamate, and is crucial for memory formation. These findings further our understanding of long-term memory and open the way for future research into human disease. Mutations in RNA granule components, including RNG105/caprin1, have links to conditions such as amyotrophic lateral sclerosis (ALS) and autism spectrum disorder (ASD). Further investigation could reveal new targets for drug treatment.
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Affiliation(s)
- Kei Nakayama
- Laboratory of Neuronal Cell Biology, National Institute for Basic Biology, Okazaki, Japan.,Department of Basic Biology, SOKENDAI, Okazaki, Japan.,Okazaki Institute for Integrative Bioscience, Okazaki, Japan
| | - Rie Ohashi
- Laboratory of Neuronal Cell Biology, National Institute for Basic Biology, Okazaki, Japan.,Department of Basic Biology, SOKENDAI, Okazaki, Japan
| | - Yo Shinoda
- Department of Applied Biological Science, Tokyo University of Science, Noda, Japan.,School of Pharmacy, Tokyo University of Pharmacy and Life Sciences, Hachioji, Japan
| | - Maya Yamazaki
- Department of Cellular Neurobiology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Manabu Abe
- Department of Cellular Neurobiology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Akihiro Fujikawa
- Division of Molecular Neurobiology, National Institute for Basic Biology, Okazaki, Japan
| | - Shuji Shigenobu
- Department of Basic Biology, SOKENDAI, Okazaki, Japan.,Functional Genomics Facility, National Institute for Basic Biology, Okazaki, Japan
| | - Akira Futatsugi
- Department of Basic Medical Science, Kobe City College of Nursing, Hyogo, Japan
| | - Masaharu Noda
- Department of Basic Biology, SOKENDAI, Okazaki, Japan.,Division of Molecular Neurobiology, National Institute for Basic Biology, Okazaki, Japan
| | - Katsuhiko Mikoshiba
- Laboratory for Developmental Neurobiology, Brain Science Institute, Wako, Japan
| | - Teiichi Furuichi
- Department of Applied Biological Science, Tokyo University of Science, Noda, Japan
| | - Kenji Sakimura
- Department of Cellular Neurobiology, Brain Research Institute, Niigata University, Niigata, Japan
| | - Nobuyuki Shiina
- Laboratory of Neuronal Cell Biology, National Institute for Basic Biology, Okazaki, Japan.,Department of Basic Biology, SOKENDAI, Okazaki, Japan.,Okazaki Institute for Integrative Bioscience, Okazaki, Japan
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27
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Dendritic transport of tick-borne flavivirus RNA by neuronal granules affects development of neurological disease. Proc Natl Acad Sci U S A 2017; 114:9960-9965. [PMID: 28847946 DOI: 10.1073/pnas.1704454114] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Neurological diseases caused by encephalitic flaviviruses are severe and associated with high levels of mortality. However, little is known about the detailed mechanisms of viral replication and pathogenicity in the brain. Previously, we reported that the genomic RNA of tick-borne encephalitis virus (TBEV), a member of the genus Flavivirus, is transported and replicated in the dendrites of neurons. In the present study, we analyzed the transport mechanism of the viral genome to dendrites. We identified specific sequences of the 5' untranslated region of TBEV genomic RNA that act as a cis-acting element for RNA transport. Mutated TBEV with impaired RNA transport in dendrites caused a reduction in neurological symptoms in infected mice. We show that neuronal granules, which regulate the transport and local translation of dendritic mRNAs, are involved in TBEV genomic RNA transport. TBEV genomic RNA bound an RNA-binding protein of neuronal granules and disturbed the transport of dendritic mRNAs. These results demonstrated a neuropathogenic virus hijacking the neuronal granule system for the transport of viral genomic RNA in dendrites, resulting in severe neurological disease.
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28
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Umemura M, Ogura T, Matsuzaki A, Nakano H, Takao K, Miyakawa T, Takahashi Y. Comprehensive Behavioral Analysis of Activating Transcription Factor 5-Deficient Mice. Front Behav Neurosci 2017; 11:125. [PMID: 28744205 PMCID: PMC5504141 DOI: 10.3389/fnbeh.2017.00125] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2017] [Accepted: 06/15/2017] [Indexed: 12/27/2022] Open
Abstract
Activating transcription factor 5 (ATF5) is a member of the CREB/ATF family of basic leucine zipper transcription factors. We previously reported that ATF5-deficient (ATF5-/-) mice demonstrated abnormal olfactory bulb development due to impaired interneuron supply. Furthermore, ATF5-/- mice were less aggressive than ATF5+/+ mice. Although ATF5 is widely expressed in the brain, and involved in the regulation of proliferation and development of neurons, the physiological role of ATF5 in the higher brain remains unknown. Our objective was to investigate the physiological role of ATF5 in the higher brain. We performed a comprehensive behavioral analysis using ATF5-/- mice and wild type littermates. ATF5-/- mice exhibited abnormal locomotor activity in the open field test. They also exhibited abnormal anxiety-like behavior in the light/dark transition test and open field test. Furthermore, ATF5-/- mice displayed reduced social interaction in the Crawley’s social interaction test and increased pain sensitivity in the hot plate test compared with wild type. Finally, behavioral flexibility was reduced in the T-maze test in ATF5-/- mice compared with wild type. In addition, we demonstrated that ATF5-/- mice display disturbances of monoamine neurotransmitter levels in several brain regions. These results indicate that ATF5 deficiency elicits abnormal behaviors and the disturbance of monoamine neurotransmitter levels in the brain. The behavioral abnormalities of ATF5-/- mice may be due to the disturbance of monoamine levels. Taken together, these findings suggest that ATF5-/- mice may be a unique animal model of some psychiatric disorders.
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Affiliation(s)
- Mariko Umemura
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life SciencesHachioji, Japan
| | - Tae Ogura
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life SciencesHachioji, Japan
| | - Ayako Matsuzaki
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life SciencesHachioji, Japan
| | - Haruo Nakano
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life SciencesHachioji, Japan
| | - Keizo Takao
- Section of Behavior Patterns, Center for Genetic Analysis of Behavior, National Institute for Physiological SciencesOkazaki, Japan.,Life Science Research Center, University of ToyamaToyama, Japan
| | - Tsuyoshi Miyakawa
- Section of Behavior Patterns, Center for Genetic Analysis of Behavior, National Institute for Physiological SciencesOkazaki, Japan.,Division of Systems Medical Science, Institute for Comprehensive Medical Science, Fujita Health UniversityToyoake, Japan
| | - Yuji Takahashi
- Laboratory of Environmental Molecular Physiology, School of Life Sciences, Tokyo University of Pharmacy and Life SciencesHachioji, Japan
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29
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Rao NR, Abad C, Perez IC, Srivastava AK, Young JI, Walz K. Rai1 Haploinsufficiency Is Associated with Social Abnormalities in Mice. BIOLOGY 2017; 6:biology6020025. [PMID: 28448442 PMCID: PMC5485472 DOI: 10.3390/biology6020025] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Revised: 04/13/2017] [Accepted: 04/20/2017] [Indexed: 11/16/2022]
Abstract
Background: Autism is characterized by difficulties in social interaction, communication, and repetitive behaviors; with different degrees of severity in each of the core areas. Haploinsufficiency and point mutations of RAI1 are associated with Smith-Magenis syndrome (SMS), a genetic condition that scores within the autism spectrum range for social responsiveness and communication, and is characterized by neurobehavioral abnormalities, intellectual disability, developmental delay, sleep disturbance, and self-injurious behaviors. Methods: To investigate the relationship between Rai1 and social impairment, we evaluated the Rai1+/− mice with a battery of tests to address social behavior in mice. Results: We found that the mutant mice showed diminished interest in social odors, abnormal submissive tendencies, and increased repetitive behaviors when compared to wild type littermates. Conclusions: These findings suggest that Rai1 contributes to social behavior in mice, and prompt it as a candidate gene for the social behaviors observed in Smith-Magenis Syndrome patients.
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Affiliation(s)
- Nalini R Rao
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL 33136, USA.
| | - Clemer Abad
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL 33136, USA.
| | - Irene C Perez
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL 33136, USA.
| | - Anand K Srivastava
- J.C. Self Research Institute, Greenwood Genetic Center, Greenwood, SC 29646, USA.
| | - Juan I Young
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL 33136, USA.
- Dr. John T. Macdonald Foundation Department of Human Genetics, Miller School of Medicine, University of Miami, Miami, FL 33136, USA.
| | - Katherina Walz
- John P. Hussman Institute for Human Genomics, University of Miami, Miami, FL 33136, USA.
- Dr. John T. Macdonald Foundation Department of Human Genetics, Miller School of Medicine, University of Miami, Miami, FL 33136, USA.
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