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Mahmood N, Choi JH, Wu PY, Dooling SW, Watkins TA, Huang Z, Lipman J, Zhao H, Yang A, Silversmith J, Inglebert Y, Koumenis C, Sharma V, Lacaille JC, Sossin WS, Khoutorsky A, McKinney RA, Costa-Mattioli M, Sonenberg N. The ISR downstream target ATF4 represses long-term memory in a cell type-specific manner. Proc Natl Acad Sci U S A 2024; 121:e2407472121. [PMID: 39047038 DOI: 10.1073/pnas.2407472121] [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: 04/14/2024] [Accepted: 06/25/2024] [Indexed: 07/27/2024] Open
Abstract
The integrated stress response (ISR), a pivotal protein homeostasis network, plays a critical role in the formation of long-term memory (LTM). The precise mechanism by which the ISR controls LTM is not well understood. Here, we report insights into how the ISR modulates the mnemonic process by using targeted deletion of the activating transcription factor 4 (ATF4), a key downstream effector of the ISR, in various neuronal and non-neuronal cell types. We found that the removal of ATF4 from forebrain excitatory neurons (but not from inhibitory neurons, cholinergic neurons, or astrocytes) enhances LTM formation. Furthermore, the deletion of ATF4 in excitatory neurons lowers the threshold for the induction of long-term potentiation, a cellular model for LTM. Transcriptomic and proteomic analyses revealed that ATF4 deletion in excitatory neurons leads to upregulation of components of oxidative phosphorylation pathways, which are critical for ATP production. Thus, we conclude that ATF4 functions as a memory repressor selectively within excitatory neurons.
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Affiliation(s)
- Niaz Mahmood
- Department of Biochemistry, McGill University, Montréal, QC H3A 1A3, Canada
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC H3A 1A3, Canada
| | - Jung-Hyun Choi
- Department of Biochemistry, McGill University, Montréal, QC H3A 1A3, Canada
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC H3A 1A3, Canada
| | - Pei You Wu
- Department of Pharmacology and Therapeutics, McGill University, Montréal, QC H3G 0B1, Canada
| | - Sean W Dooling
- Department of Neuroscience, Baylor College of Medicine, Houston, TX 77030
| | - Trent A Watkins
- Department of Neuroscience, Baylor College of Medicine, Houston, TX 77030
| | - Ziying Huang
- Department of Biochemistry, McGill University, Montréal, QC H3A 1A3, Canada
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC H3A 1A3, Canada
| | - Jesse Lipman
- Department of Biochemistry, McGill University, Montréal, QC H3A 1A3, Canada
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC H3A 1A3, Canada
| | - Hanjie Zhao
- Department of Biochemistry, McGill University, Montréal, QC H3A 1A3, Canada
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC H3A 1A3, Canada
| | - Anqi Yang
- Department of Biochemistry, McGill University, Montréal, QC H3A 1A3, Canada
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC H3A 1A3, Canada
| | - Jake Silversmith
- Department of Biochemistry, McGill University, Montréal, QC H3A 1A3, Canada
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC H3A 1A3, Canada
| | - Yanis Inglebert
- Department of Pharmacology and Therapeutics, McGill University, Montréal, QC H3G 0B1, Canada
- Department of Neurosciences, Center for Interdisciplinary Research on Brain and Learning, Research Group on Neural Signaling and Circuitry, University of Montréal, Montréal, QC H3T1J4, Canada
| | - Constantinos Koumenis
- Department of Radiation Oncology, University of Pennsylvania Perelman School of Medicine, Philadelphia, PA 19104-5156
| | - Vijendra Sharma
- Department of Biomedical Sciences, University of Windsor, Windsor, ON N9B 3P4, Canada
| | - Jean-Claude Lacaille
- Department of Neurosciences, Center for Interdisciplinary Research on Brain and Learning, Research Group on Neural Signaling and Circuitry, University of Montréal, Montréal, QC H3T1J4, Canada
| | - Wayne S Sossin
- Department of Neurology and Neurosurgery, Montreal Neurological Institute, McGill University, Montréal, QC H3A 2B4, Canada
| | - Arkady Khoutorsky
- Department of Anesthesia and Faculty of Dental Medicine and Oral Health Sciences, McGill University, Montréal, QC H4A3J1, Canada
- Alan Edwards Centre for Research on Pain, McGill University, Montréal, QC H3A 2B4, Canada
| | - R Anne McKinney
- Department of Pharmacology and Therapeutics, McGill University, Montréal, QC H3G 0B1, Canada
| | - Mauro Costa-Mattioli
- Department of Neuroscience, Baylor College of Medicine, Houston, TX 77030
- Memory and Brain Research Center, Baylor College of Medicine, Houston, TX 77030
- Altos Labs Inc., Bay Area Institute of Science, Redwood City, CA 94065
| | - Nahum Sonenberg
- Department of Biochemistry, McGill University, Montréal, QC H3A 1A3, Canada
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC H3A 1A3, Canada
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Lockshin ER, Calakos N. The integrated stress response in brain diseases: A double-edged sword for proteostasis and synapses. Curr Opin Neurobiol 2024; 87:102886. [PMID: 38901329 DOI: 10.1016/j.conb.2024.102886] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2024] [Revised: 05/22/2024] [Accepted: 05/24/2024] [Indexed: 06/22/2024]
Abstract
The integrated stress response (ISR) is a highly conserved biochemical pathway that regulates protein synthesis. The ISR is activated in response to diverse stressors to restore cellular homeostasis. As such, the ISR is implicated in a wide range of diseases, including brain disorders. However, in the brain, the ISR also has potent influence on processes beyond proteostasis, namely synaptic plasticity, learning and memory. Thus, in the setting of brain diseases, ISR activity may have dual effects on proteostasis and synaptic function. In this review, we consider the ISR's contribution to brain disorders through the lens of its potential effects on synaptic plasticity. From these examples, we illustrate that at times ISR activity may be a "double-edged sword". We also highlight its potential as a therapeutic target to improve circuit function in brain diseases independent of its role in disease pathogenesis.
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Affiliation(s)
- Elana R Lockshin
- Department of Neurobiology, Duke University Medical Center, Durham, NC 27710, USA; Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA
| | - Nicole Calakos
- Department of Neurobiology, Duke University Medical Center, Durham, NC 27710, USA; Aligning Science Across Parkinson's (ASAP) Collaborative Research Network, Chevy Chase, MD 20815, USA; Department of Neurology, Duke University Medical Center, Durham, NC 27710, USA; Department of Cell Biology, Duke University Medical Center, Durham, NC 27710, USA.
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3
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Ketchesin KD, Becker-Krail DD, Xue X, Wilson RS, Lam TT, Williams KR, Nairn AC, Tseng GC, Logan RW. Differential Effects of Cocaine and Morphine on the Diurnal Regulation of the Mouse Nucleus Accumbens Proteome. J Proteome Res 2023. [PMID: 37311105 PMCID: PMC10392613 DOI: 10.1021/acs.jproteome.3c00126] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Substance use disorders are associated with disruptions in sleep and circadian rhythms that persist during abstinence and may contribute to relapse risk. Repeated use of substances such as psychostimulants and opioids may lead to significant alterations in molecular rhythms in the nucleus accumbens (NAc), a brain region central to reward and motivation. Previous studies have identified rhythm alterations in the transcriptome of the NAc and other brain regions following the administration of psychostimulants or opioids. However, little is known about the impact of substance use on the diurnal rhythms of the proteome in the NAc. We used liquid chromatography coupled to tandem mass spectrometry-based quantitative proteomics, along with a data-independent acquisition analysis pipeline, to investigate the effects of cocaine or morphine administration on diurnal rhythms of proteome in the mouse NAc. Overall, our data reveal cocaine and morphine differentially alter diurnal rhythms of the proteome in the NAc, with largely independent differentially expressed proteins dependent on time-of-day. Pathways enriched from cocaine altered protein rhythms were primarily associated with glucocorticoid signaling and metabolism, whereas morphine was associated with neuroinflammation. Collectively, these findings are the first to characterize the diurnal regulation of the NAc proteome and demonstrate a novel relationship between the phase-dependent regulation of protein expression and the differential effects of cocaine and morphine on the NAc proteome. The proteomics data in this study are available via ProteomeXchange with identifier PXD042043.
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Affiliation(s)
- Kyle D Ketchesin
- Translational Neuroscience Program, Department of Psychiatry, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15219, United States
- Center for Neuroscience, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Darius D Becker-Krail
- Translational Neuroscience Program, Department of Psychiatry, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15219, United States
- Center for Neuroscience, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Xiangning Xue
- Department of Biostatistics, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Rashaun S Wilson
- Yale/NIDA Neuroproteomics Center, 300 George Street, New Haven, Connecticut 06511, United States
- W.M. Keck Biotechnology Mass Spectrometry (MS) & Proteomics Resource Laboratory, Yale University School of Medicine, New Haven, Connecticut 06511, United States
- Department of Molecular Biophysics and Biochemistry, Yale University School of Medicine, New Haven, Connecticut 06520, United States
| | - TuKiet T Lam
- Yale/NIDA Neuroproteomics Center, 300 George Street, New Haven, Connecticut 06511, United States
- W.M. Keck Biotechnology Mass Spectrometry (MS) & Proteomics Resource Laboratory, Yale University School of Medicine, New Haven, Connecticut 06511, United States
- Department of Molecular Biophysics and Biochemistry, Yale University School of Medicine, New Haven, Connecticut 06520, United States
| | - Kenneth R Williams
- Yale/NIDA Neuroproteomics Center, 300 George Street, New Haven, Connecticut 06511, United States
- Department of Molecular Biophysics and Biochemistry, Yale University School of Medicine, New Haven, Connecticut 06520, United States
| | - Angus C Nairn
- Yale/NIDA Neuroproteomics Center, 300 George Street, New Haven, Connecticut 06511, United States
- Department of Psychiatry, Yale University School of Medicine, Connecticut Mental Health Center, New Haven, Connecticut 06511, United States
| | - George C Tseng
- Department of Biostatistics, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
| | - Ryan W Logan
- Translational Neuroscience Program, Department of Psychiatry, School of Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania 15219, United States
- Center for Neuroscience, University of Pittsburgh, Pittsburgh, Pennsylvania 15261, United States
- Department of Psychiatry, University of Massachusetts Chan Medical School, Worcester, Massachusetts 01655, United States
- Department of Neurobiology, University of Massachusetts Chan Medical School, Worcester, Massachusetts 01605, United States
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Zimbelman AR, Wong B, Murray CH, Wolf ME, Stefanik MT. Dopamine D1 and NMDA receptor co-regulation of protein translation in cultured nucleus accumbens neurons. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.04.02.535293. [PMID: 37034633 PMCID: PMC10081306 DOI: 10.1101/2023.04.02.535293] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/11/2023]
Abstract
Protein translation is essential for some forms of synaptic plasticity. We used nucleus accumbens (NAc) medium spiny neurons (MSN), co-cultured with cortical neurons to restore excitatory synapses, to examine whether dopamine modulates protein translation in NAc MSN. FUNCAT was used to measure translation in MSNs under basal conditions and after disinhibiting excitatory transmission using the GABAA receptor antagonist bicuculline (2 hr). Under basal conditions, translation was not altered by the D1-class receptor (D1R) agonist SKF81297 or the D2-class receptor (D2R) agonist quinpirole. Bicuculline alone robustly increased translation. This was reversed by quinpirole but not SKF81297. It was also reversed by co-incubation with the D1R antagonist SCH23390, but not the D2R antagonist eticlopride, suggesting dopaminergic tone at D1Rs. This was surprising because no dopamine neurons are present. An alternative explanation is that bicuculline activates translation by increasing glutamate tone at NMDA receptors (NMDAR) within D1R/NMDAR heteromers, which have been described in other cell types. Supporting this, immunocytochemistry and proximity ligation assays revealed D1/NMDAR heteromers on NAc cells both in vitro and in vivo. Further, bicuculline's effect was reversed to the same extent by SCH23390 alone, the NMDAR antagonist APV alone, or SCH23390+APV. These results suggest that: 1) excitatory synaptic transmission stimulates translation in NAc MSNs, 2) this is opposed when glutamate activates D1R/NMDAR heteromers, even in the absence of dopamine, and 3) antagonist occupation of D1Rs within the heteromers prevents their activation. Our study is the first to suggest a role for D2 receptors and D1R/NMDAR heteromers in regulating protein translation.
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Affiliation(s)
- Alexa R. Zimbelman
- Department of Psychology and Neuroscience, North Central College, Naperville, IL 60540
| | - Benjamin Wong
- Department of Psychology and Neuroscience, North Central College, Naperville, IL 60540
| | - Conor H. Murray
- Department of Neuroscience, The Chicago Medical School at Rosalind Franklin University of Medicine and Science, North Chicago, IL, 60064
- Present address: Department of Psychiatry and Behavioral Neuroscience, University of Chicago, Chicago, IL
| | - Marina E. Wolf
- Department of Neuroscience, The Chicago Medical School at Rosalind Franklin University of Medicine and Science, North Chicago, IL, 60064
- These authors contributed equally
- Present address: Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, OR 97212
| | - Michael T. Stefanik
- Department of Psychology and Neuroscience, North Central College, Naperville, IL 60540
- Department of Neuroscience, The Chicago Medical School at Rosalind Franklin University of Medicine and Science, North Chicago, IL, 60064
- These authors contributed equally
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5
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Ketchesin KD, Becker-Krail DD, Xue X, Wilson RS, Lam TT, Williams KR, Nairn AC, Tseng GC, Logan RW. Differential Effects of Cocaine and Morphine on the Diurnal Regulation of the Mouse Nucleus Accumbens Proteome. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.03.01.530696. [PMID: 36909659 PMCID: PMC10002738 DOI: 10.1101/2023.03.01.530696] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/07/2023]
Abstract
Substance use disorders (SUDs) are associated with disruptions in sleep and circadian rhythms that persist during abstinence and may contribute to relapse risk. Repeated use of substances such as psychostimulants and opioids may lead to significant alterations in molecular rhythms in the nucleus accumbens (NAc), a brain region central to reward and motivation. Previous studies have identified rhythm alterations in the transcriptome of the NAc and other brain regions following the administration of psychostimulants or opioids. However, little is known about the impact of substance use on the diurnal rhythms of the proteome in the NAc. We used liquid chromatography coupled to tandem mass spectrometry-based (LC-MS/MS) quantitative proteomics, along with a data-independent acquisition (DIA) analysis pipeline, to investigate the effects of cocaine or morphine administration on diurnal rhythms of proteome in the mouse NAc. Overall, our data reveals cocaine and morphine differentially alters diurnal rhythms of the proteome in the NAc, with largely independent differentially expressed proteins dependent on time-of-day. Pathways enriched from cocaine altered protein rhythms were primarily associated with glucocorticoid signaling and metabolism, whereas morphine was associated with neuroinflammation. Collectively, these findings are the first to characterize the diurnal regulation of the NAc proteome and demonstrate a novel relationship between phase-dependent regulation of protein expression and the differential effects of cocaine and morphine on the NAc proteome.
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6
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Kawa AB, Hwang EK, Funke JR, Zhou H, Costa-Mattioli M, Wolf ME. Positive Allosteric Modulation of mGlu 1 Reverses Cocaine-Induced Behavioral and Synaptic Plasticity Through the Integrated Stress Response and Oligophrenin-1. Biol Psychiatry 2022; 92:871-879. [PMID: 35871097 PMCID: PMC10656746 DOI: 10.1016/j.biopsych.2022.05.008] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 04/21/2022] [Accepted: 05/05/2022] [Indexed: 11/21/2022]
Abstract
BACKGROUND Cue-induced cocaine craving progressively intensifies (incubates) during abstinence from cocaine self-administration. Expression of incubated cocaine craving depends on elevated calcium-permeable AMPA receptors (CP-AMPARs) on medium spiny neurons in the nucleus accumbens (NAc) core. After incubation has occurred, stimulation of NAc metabotropic glutamate 1 (mGlu1) receptors or systemic administration of mGlu1 positive allosteric modulators removes CP-AMPARs from NAc synapses via dynamin-dependent internalization (mGlu1 long-term depression [LTD]) and thereby reduces incubated cocaine craving. Because mGlu1 positive allosteric modulators are potential therapeutics for cocaine craving, it is important to further define the mechanism triggering this mGlu1-LTD. METHODS Male and female rats self-administered saline or cocaine (10 days) using a long access regimen (6 h/day). Following ≥40 days of abstinence, we assessed the ability of an mGlu1 positive allosteric modulator to inhibit expression of incubated craving and remove CP-AMPARs from NAc synapses under control conditions, after blocking the integrated stress response (ISR), or after knocking down oligophrenin-1, a mediator of the ISR that can promote AMPAR endocytosis. AMPAR transmission in NAc medium spiny neurons was assessed with ex vivo slice recordings. RESULTS mGlu1 stimulation reduced cue-induced craving and removed synaptic CP-AMPARs. When the ISR was blocked prior to mGlu1 stimulation, there was no reduction in cue-induced craving, nor were CP-AMPARs removed from the synapse. Further, selective knockdown of oligophrenin-1 blocked mGlu1-LTD. CONCLUSIONS Our results indicate that mGlu1-LTD in the NAc and consequently the reduction of cue-induced seeking occur through activation of the ISR, which induces translation of oligophrenin-1. We also demonstrate CP-AMPAR accumulation and mGlu1 reversal in female rats, as previously shown in male rats.
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Affiliation(s)
- Alex B Kawa
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, Oregon
| | - Eun-Kyung Hwang
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, Oregon
| | - Jonathan R Funke
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, Oregon
| | - Hongyi Zhou
- Department of Neuroscience, Baylor College of Medicine, Houston, Texas
| | | | - Marina E Wolf
- Department of Behavioral Neuroscience, Oregon Health & Science University, Portland, Oregon.
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7
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Beiser T, Lisniansky E, Weitz M, Bingor A, Grad E, Rosenblum K, Thornton C, Yaka R. A functional eEF2K-eEF2 pathway in the NAc is critical for the expression of cocaine-induced psychomotor sensitisation and conditioned place preference. Transl Psychiatry 2022; 12:460. [PMID: 36319619 PMCID: PMC9626485 DOI: 10.1038/s41398-022-02232-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Revised: 10/20/2022] [Accepted: 10/24/2022] [Indexed: 01/24/2023] Open
Abstract
Recent evidence links synaptic plasticity and mRNA translation, via the eukaryotic elongation factor 2 kinase (eEF2K) and its only known substrate, eEF2. However, the involvement of the eEF2 pathway in cocaine-induced neuroadaptations and cocaine-induced behaviours is not known. Knock-in (KI) mice and shRNA were used to globally and specifically reduce eEF2K expression. Cocaine psychomotor sensitization and conditioned place preference were used to evaluate behavioural outcome. Changes in eEF2 phosphorylation were determined by western blot analyses. No effect was observed on the AMPA/NMDA receptor current ratio in the ventral tegmental area, 24 h after cocaine injection in eEF2K-KI mice compared with WT. However, development and expression of cocaine psychomotor sensitization were decreased in KI mice. Phosphorylated eEF2 was decreased one day after psychomotor sensitization and returned to baseline at seven days in the nucleus accumbens (NAc) of WT mice, but not in eEF2K-KI mice. However, one day following cocaine challenge, phosphorylated eEF2 decreased in WT but not KI mice. Importantly, specific targeting of eEF2K expression by shRNA in the NAc decreased cocaine condition place preference. These results suggest that the eEF2 pathway play a role in cocaine-induced locomotor sensitization and conditioned place preference.
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Affiliation(s)
- Tehila Beiser
- grid.9619.70000 0004 1937 0538Institute for Drug Research (IDR), School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Elvira Lisniansky
- grid.9619.70000 0004 1937 0538Institute for Drug Research (IDR), School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Moriya Weitz
- grid.9619.70000 0004 1937 0538Institute for Drug Research (IDR), School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Alexey Bingor
- grid.9619.70000 0004 1937 0538Institute for Drug Research (IDR), School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Etty Grad
- grid.9619.70000 0004 1937 0538Institute for Drug Research (IDR), School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Kobi Rosenblum
- grid.18098.380000 0004 1937 0562Sagol Department of Neuroscience, University of Haifa, Haifa, Israel
| | - Claire Thornton
- grid.20931.390000 0004 0425 573XDepartment of Comparative Biomedical Sciences, Royal Veterinary College, London, UK
| | - Rami Yaka
- Institute for Drug Research (IDR), School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel.
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8
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Regulation and function of elF2B in neurological and metabolic disorders. Biosci Rep 2022; 42:231311. [PMID: 35579296 PMCID: PMC9208314 DOI: 10.1042/bsr20211699] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Revised: 04/28/2022] [Accepted: 05/12/2022] [Indexed: 11/27/2022] Open
Abstract
Eukaryotic initiation factor 2B, eIF2B is a guanine nucleotide exchange, factor with a central role in coordinating the initiation of translation. During stress and disease, the activity of eIF2B is inhibited via the phosphorylation of its substrate eIF2 (p-eIF2α). A number of different kinases respond to various stresses leading to the phosphorylation of the alpha subunit of eIF2, and collectively this regulation is known as the integrated stress response, ISR. This targeting of eIF2B allows the cell to regulate protein synthesis and reprogramme gene expression to restore homeostasis. Advances within structural biology have furthered our understanding of how eIF2B interacts with eIF2 in both the productive GEF active form and the non-productive eIF2α phosphorylated form. Here, current knowledge of the role of eIF2B in the ISR is discussed within the context of normal and disease states focusing particularly on diseases such as vanishing white matter disease (VWMD) and permanent neonatal diabetes mellitus (PNDM), which are directly linked to mutations in eIF2B. The role of eIF2B in synaptic plasticity and memory formation is also discussed. In addition, the cellular localisation of eIF2B is reviewed and considered along with the role of additional in vivo eIF2B binding factors and protein modifications that may play a role in modulating eIF2B activity during health and disease.
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9
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Korneeva NL. Integrated Stress Response in Neuronal Pathology and in Health. BIOCHEMISTRY. BIOKHIMIIA 2022; 87:S111-S127. [PMID: 35501991 DOI: 10.1134/s0006297922140103] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 10/29/2021] [Accepted: 11/02/2021] [Indexed: 06/14/2023]
Abstract
Neurodegeneration involves progressive pathological loss of a specific population of neurons, glial activation, and dysfunction of myelinating oligodendrocytes leading to cognitive impairment and altered movement, breathing, and senses. Neuronal degeneration is a hallmark of aging, stroke, drug abuse, toxic chemical exposure, viral infection, chronic inflammation, and a variety of neurological diseases. Accumulation of intra- and extracellular protein aggregates is a common characteristic of cell pathologies. Excessive production of reactive oxygen species and nitric oxide, induction of endoplasmic reticulum stress, and accumulation of misfolded protein aggregates have been shown to trigger a defensive mechanism called integrated stress response (ISR). Activation of ISR is important for synaptic plasticity in learning and memory formation. However, sustaining of ISR may lead to the development of neuronal pathologies and altered patterns in behavior and perception.
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Affiliation(s)
- Nadejda L Korneeva
- Louisiana State University Health Science Center, Shreveport, LA 71103, USA.
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10
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Pharmacological targeting of endoplasmic reticulum stress in disease. Nat Rev Drug Discov 2021; 21:115-140. [PMID: 34702991 DOI: 10.1038/s41573-021-00320-3] [Citation(s) in RCA: 176] [Impact Index Per Article: 58.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/15/2021] [Indexed: 02/08/2023]
Abstract
The accumulation of misfolded proteins in the endoplasmic reticulum (ER) leads to ER stress, resulting in activation of the unfolded protein response (UPR) that aims to restore protein homeostasis. However, the UPR also plays an important pathological role in many diseases, including metabolic disorders, cancer and neurological disorders. Over the last decade, significant effort has been invested in targeting signalling proteins involved in the UPR and an array of drug-like molecules is now available. However, these molecules have limitations, the understanding of which is crucial for their development into therapies. Here, we critically review the existing ER stress and UPR-directed drug-like molecules, highlighting both their value and their limitations.
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Cabana-Domínguez J, Martín-García E, Gallego-Roman A, Maldonado R, Fernàndez-Castillo N, Cormand B. Reduced cue-induced reinstatement of cocaine-seeking behavior in Plcb1 +/- mice. Transl Psychiatry 2021; 11:521. [PMID: 34635637 PMCID: PMC8505421 DOI: 10.1038/s41398-021-01396-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/19/2020] [Revised: 03/24/2021] [Accepted: 04/20/2021] [Indexed: 11/28/2022] Open
Abstract
Cocaine addiction causes serious health problems, and no effective treatment is available yet. We previously identified a genetic risk variant for cocaine addiction in the PLCB1 gene and found this gene upregulated in postmortem brains of cocaine abusers and in human dopaminergic neuron-like cells after an acute cocaine exposure. Here, we functionally tested the contribution of the PLCB1 gene to cocaine addictive properties using Plcb1+/- mice. First, we performed a general phenotypic characterization and found that Plcb1+/- mice showed normal behavior, although they had increased anxiety and impaired short-term memory. Subsequently, mice were trained for operant conditioning, self-administered cocaine for 10 days, and were tested for cocaine motivation. After extinction, we found a reduction in the cue-induced reinstatement of cocaine-seeking behavior in Plcb1+/- mice. After reinstatement, we identified transcriptomic alterations in the medial prefrontal cortex of Plcb1+/- mice, mostly related to pathways relevant to addiction like the dopaminergic synapse and long-term potentiation. To conclude, we found that heterozygous deletion of the Plcb1 gene decreases cue-induced reinstatement of cocaine-seeking, pointing at PLCB1 as a possible therapeutic target for preventing relapse and treating cocaine addiction.
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Affiliation(s)
- Judit Cabana-Domínguez
- grid.5841.80000 0004 1937 0247Department de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Catalonia Spain ,grid.452372.50000 0004 1791 1185Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain ,grid.5841.80000 0004 1937 0247Institut de Biomedicina de la Universitat de Barcelona (IBUB), Barcelona, Catalonia Spain ,grid.411160.30000 0001 0663 8628Institut de Recerca Sant Joan de Déu (IR-SJD), Barcelona, Catalonia Spain
| | - Elena Martín-García
- grid.5612.00000 0001 2172 2676Laboratory of Neuropharmacology-Neurophar, Department of Experimental and Health Sciences, Universitat Pompeu Fabra (UPF), Barcelona, Catalonia Spain ,grid.20522.370000 0004 1767 9005Hospital del Mar Medical Research Institute (IMIM), Barcelona, Catalonia Spain
| | - Ana Gallego-Roman
- grid.5612.00000 0001 2172 2676Laboratory of Neuropharmacology-Neurophar, Department of Experimental and Health Sciences, Universitat Pompeu Fabra (UPF), Barcelona, Catalonia Spain
| | - Rafael Maldonado
- grid.5612.00000 0001 2172 2676Laboratory of Neuropharmacology-Neurophar, Department of Experimental and Health Sciences, Universitat Pompeu Fabra (UPF), Barcelona, Catalonia Spain ,grid.20522.370000 0004 1767 9005Hospital del Mar Medical Research Institute (IMIM), Barcelona, Catalonia Spain
| | - Noèlia Fernàndez-Castillo
- Department de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Catalonia, Spain. .,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain. .,Institut de Biomedicina de la Universitat de Barcelona (IBUB), Barcelona, Catalonia, Spain. .,Institut de Recerca Sant Joan de Déu (IR-SJD), Barcelona, Catalonia, Spain.
| | - Bru Cormand
- Department de Genètica, Microbiologia i Estadística, Facultat de Biologia, Universitat de Barcelona, Barcelona, Catalonia, Spain. .,Centro de Investigación Biomédica en Red de Enfermedades Raras (CIBERER), Madrid, Spain. .,Institut de Biomedicina de la Universitat de Barcelona (IBUB), Barcelona, Catalonia, Spain. .,Institut de Recerca Sant Joan de Déu (IR-SJD), Barcelona, Catalonia, Spain.
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12
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Oliveira MM, Lourenco MV, Longo F, Kasica NP, Yang W, Ureta G, Ferreira DDP, Mendonça PHJ, Bernales S, Ma T, De Felice FG, Klann E, Ferreira ST. Correction of eIF2-dependent defects in brain protein synthesis, synaptic plasticity, and memory in mouse models of Alzheimer's disease. Sci Signal 2021; 14:14/668/eabc5429. [PMID: 33531382 DOI: 10.1126/scisignal.abc5429] [Citation(s) in RCA: 64] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Neuronal protein synthesis is essential for long-term memory consolidation, and its dysregulation is implicated in various neurodegenerative disorders, including Alzheimer's disease (AD). Cellular stress triggers the activation of protein kinases that converge on the phosphorylation of eukaryotic translation initiation factor 2α (eIF2α), which attenuates mRNA translation. This translational inhibition is one aspect of the integrated stress response (ISR). We found that postmortem brain tissue from AD patients showed increased phosphorylation of eIF2α and reduced abundance of eIF2B, another key component of the translation initiation complex. Systemic administration of the small-molecule compound ISRIB (which blocks the ISR downstream of phosphorylated eIF2α) rescued protein synthesis in the hippocampus, measures of synaptic plasticity, and performance on memory-associated behavior tests in wild-type mice cotreated with salubrinal (which inhibits translation by inducing eIF2α phosphorylation) and in both β-amyloid-treated and transgenic AD model mice. Thus, attenuating the ISR downstream of phosphorylated eIF2α may restore hippocampal protein synthesis and delay cognitive decline in AD patients.
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Affiliation(s)
- Mauricio M Oliveira
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil.,Center for Neural Science, New York University, New York, NY 10003, USA
| | - Mychael V Lourenco
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil
| | - Francesco Longo
- Center for Neural Science, New York University, New York, NY 10003, USA
| | - Nicole P Kasica
- Department of Internal Medicine, Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
| | - Wenzhong Yang
- Department of Internal Medicine, Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
| | | | - Danielle D P Ferreira
- Institute of Biomedical Sciences, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil
| | - Paulo H J Mendonça
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil
| | | | - Tao Ma
- Department of Internal Medicine, Gerontology and Geriatric Medicine, Wake Forest School of Medicine, Winston-Salem, NC 27157, USA
| | - Fernanda G De Felice
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil.,Centre for Neuroscience Studies and Department of Psychiatry, Queen's University, Kingston, ON K7L 3N6, Canada
| | - Eric Klann
- Center for Neural Science, New York University, New York, NY 10003, USA. .,NYU Neuroscience Institute, New York University School of Medicine, New York, NY 10016, USA
| | - Sergio T Ferreira
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil. .,Institute of Biophysics Carlos Chagas Filho, Federal University of Rio de Janeiro, Rio de Janeiro, RJ 21941-902, Brazil
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13
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Srinivasan V, Korhonen L, Lindholm D. The Unfolded Protein Response and Autophagy as Drug Targets in Neuropsychiatric Disorders. Front Cell Neurosci 2020; 14:554548. [PMID: 33132844 PMCID: PMC7550790 DOI: 10.3389/fncel.2020.554548] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 09/02/2020] [Indexed: 12/15/2022] Open
Abstract
Neurons are polarized in structure with a cytoplasmic compartment extending into dendrites and a long axon that terminates at the synapse. The high level of compartmentalization imposes specific challenges for protein quality control in neurons making them vulnerable to disturbances that may lead to neurological dysfunctions including neuropsychiatric diseases. Synapse and dendrites undergo structural modulations regulated by neuronal activity involve key proteins requiring strict control of their turnover rates and degradation pathways. Recent advances in the study of the unfolded protein response (UPR) and autophagy processes have brought novel insights into the specific roles of these processes in neuronal physiology and synaptic signaling. In this review, we highlight recent data and concepts about UPR and autophagy in neuropsychiatric disorders and synaptic plasticity including a brief outline of possible therapeutic approaches to influence UPR and autophagy signaling in these diseases.
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Affiliation(s)
- Vignesh Srinivasan
- Medicum, Department of Biochemistry and Developmental Biology, Faculty of Medicine, University of Helsinki, Helsinki, Finland.,Minerva Foundation Institute for Medical Research, Biomedicum Helsinki 2U, Helsinki, Finland
| | - Laura Korhonen
- Department of Biochemical and Clinical Sciences (BKV), Linköping University, Linköping, Sweden.,Department of Child and Adolescent Psychiatry, Region Östergötland, Linköping, Sweden
| | - Dan Lindholm
- Medicum, Department of Biochemistry and Developmental Biology, Faculty of Medicine, University of Helsinki, Helsinki, Finland.,Minerva Foundation Institute for Medical Research, Biomedicum Helsinki 2U, Helsinki, Finland
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14
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Costa-Mattioli M, Walter P. The integrated stress response: From mechanism to disease. Science 2020; 368:368/6489/eaat5314. [PMID: 32327570 DOI: 10.1126/science.aat5314] [Citation(s) in RCA: 654] [Impact Index Per Article: 163.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Protein quality control is essential for the proper function of cells and the organisms that they make up. The resulting loss of proteostasis, the processes by which the health of the cell's proteins is monitored and maintained at homeostasis, is associated with a wide range of age-related human diseases. Here, we highlight how the integrated stress response (ISR), a central signaling network that responds to proteostasis defects by tuning protein synthesis rates, impedes the formation of long-term memory. In addition, we address how dysregulated ISR signaling contributes to the pathogenesis of complex diseases, including cognitive disorders, neurodegeneration, cancer, diabetes, and metabolic disorders. The development of tools through which the ISR can be modulated promises to uncover new avenues to diminish pathologies resulting from it for clinical benefit.
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Affiliation(s)
- Mauro Costa-Mattioli
- Department of Neuroscience, Memory and Brain Research Center, Baylor College of Medicine, Houston, TX, USA.
| | - Peter Walter
- Howard Hughes Medical Institute and Department of Biochemistry and Biophysics, University of California at San Francisco, San Francisco, CA, USA.
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15
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Wang BC, Zhang ST, Chen G. Research Progress of the UPR Mechanism and its Effect on Improving Foreign Protein Expression. Protein Pept Lett 2020; 27:831-840. [PMID: 32264804 DOI: 10.2174/0929866527666200407113549] [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: 01/09/2020] [Revised: 03/02/2020] [Accepted: 03/06/2020] [Indexed: 11/22/2022]
Abstract
The unfolded protein response (UPR) is a protective mechanism against endoplasmic reticulum (ER) stress that induces a series of signal transduction pathways to eliminate misfolded proteins. The UPR mechanism is highly conserved in fungi, higher organisms, plants and mammals. The UPR pathway is activated to stabilize ER functions when there are too many unfolded proteins or misfolded proteins in the ER. However, stress continues when ER proteins are stimulated by toxic substances that affect the balance of the UPR pathway, which causes changes in the structure and function of the ER and other organelles. These ultimately disrupt homeostasis in the body and cause pathological reactions that can be fatal. The UPR mechanism has clear effects on stabilizing the protein-folding environment. Dysfunction or disruption of the UPR mechanism is associated with numerous disorders, including neurodegenerative diseases, loss of control of protein secretion, cerebral ischemia and epilepsy, neuropsychiatric diseases, eye diseases, skin diseases, metabolic and inflammatory diseases, atherosclerosis, and heart disease. Thus, characterization of UPR function and its dysfunction has significant importance and has broad application prospects, which make research into the UPR a research hotspot.
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Affiliation(s)
- Bao-Chen Wang
- Key Laboratory of Straw Biology and Utilization, Ministry of Education Changchun City, Jilin Province 130118, China
| | - Si-Tong Zhang
- Key Laboratory of Straw Biology and Utilization, Ministry of Education Changchun City, Jilin Province 130118, China.,Jilin Agricultural University, College of Life Sciences Changchun City, Jilin Province 130118, China,Straw Biotransformation and Agricultural Utilization Engineering Research Center, Changchun City, Jilin Province 130118, China
| | - Guang Chen
- Key Laboratory of Straw Biology and Utilization, Ministry of Education Changchun City, Jilin Province 130118, China.,Jilin Agricultural University, College of Life Sciences Changchun City, Jilin Province 130118, China,Straw Biotransformation and Agricultural Utilization Engineering Research Center, Changchun City, Jilin Province 130118, China
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16
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Krukowski K, Nolan A, Frias ES, Grue K, Becker M, Ureta G, Delgado L, Bernales S, Sohal VS, Walter P, Rosi S. Integrated Stress Response Inhibitor Reverses Sex-Dependent Behavioral and Cell-Specific Deficits after Mild Repetitive Head Trauma. J Neurotrauma 2020; 37:1370-1380. [PMID: 31884883 DOI: 10.1089/neu.2019.6827] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023] Open
Abstract
Mild repetitive traumatic brain injury (rTBI) induces chronic behavioral and cognitive alterations and increases the risk for dementia. Currently, there are no therapeutic strategies to prevent or mitigate chronic deficits associated with rTBI. Previously we developed an animal model of rTBI that recapitulates the cognitive and behavioral deficits observed in humans. We now report that rTBI results in an increase in risk-taking behavior in male but not female mice. This behavioral phenotype is associated with chronic activation of the integrated stress response and cell-specific synaptic alterations in the type A subtype of layer V pyramidal neurons in the medial prefrontal cortex. Strikingly, by briefly treating animals weeks after injury with ISRIB, a selective inhibitor of the integrated stress response (ISR), we (1) relieve ISR activation, (2) reverse the increased risk-taking behavioral phenotype and maintain this reversal, and (3) restore cell-specific synaptic function in the affected mice. Our results indicate that targeting the ISR even at late time points after injury can permanently reverse behavioral changes. As such, pharmacological inhibition of the ISR emerges as a promising avenue to combat rTBI-induced behavioral dysfunction.
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Affiliation(s)
- Karen Krukowski
- Department of Physical Therapy and Rehabilitation Science, University of California, San Francisco, California, USA.,Department of Brain and Spinal Injury Center, University of California, San Francisco, California, USA
| | - Amber Nolan
- Department of Physical Therapy and Rehabilitation Science, University of California, San Francisco, California, USA.,Department of Brain and Spinal Injury Center, University of California, San Francisco, California, USA.,Department of Pathology, University of California, San Francisco, California, USA
| | - Elma S Frias
- Department of Physical Therapy and Rehabilitation Science, University of California, San Francisco, California, USA.,Department of Brain and Spinal Injury Center, University of California, San Francisco, California, USA.,Department of Biomedical Sciences, University of California, San Francisco, California, USA
| | - Katherine Grue
- Department of Physical Therapy and Rehabilitation Science, University of California, San Francisco, California, USA.,Department of Brain and Spinal Injury Center, University of California, San Francisco, California, USA
| | - McKenna Becker
- Department of Physical Therapy and Rehabilitation Science, University of California, San Francisco, California, USA.,Department of Brain and Spinal Injury Center, University of California, San Francisco, California, USA
| | | | | | | | - Vikaas S Sohal
- Department of Psychiatry, University of California, San Francisco, California, USA
| | - Peter Walter
- Department of Biochemistry and Biophysics, University of California, San Francisco, California, USA.,Howard Hughes Medical Institute, University of California, San Francisco, California, USA
| | - Susanna Rosi
- Department of Physical Therapy and Rehabilitation Science, University of California, San Francisco, California, USA.,Department of Brain and Spinal Injury Center, University of California, San Francisco, California, USA.,Department of Neurological Surgery, University of California, San Francisco, California, USA.,Weill Institute for Neuroscience, University of California, San Francisco, California, USA.,Kavli Institute of Fundamental Neuroscience, University of California, San Francisco, California, USA
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17
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Starski P, Peyton L, Oliveros A, Heppelmann CJ, Dasari S, Choi DS. Proteomic Profile of a Chronic Binge Ethanol Exposure Model. J Proteome Res 2019; 18:3492-3502. [PMID: 31329447 DOI: 10.1021/acs.jproteome.9b00394] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Chronic binge alcohol drinking is known to increase risky decision through pathological impulsive behaviors. Recently, we established a novel rodent model of ethanol-induced waiting impulsivity using 5-choice serial reaction time task (5-CSRTT) in mice. However, molecular mechanisms underlying the chronic binge ethanol-induced waiting impulsivity is not well characterized. Among brain regions involved in impulsivity, the anterior cingulate cortex (ACC) is a major neural substrate for mediating the 5-CSRTT-based waiting impulsivity. Thus, we sought to determine the ACC proteomic profile using label-free proteomics of mice exhibiting ethanol-induced impulsivity. Ingenuity pathway analysis revealed that impulsivity-related proteins involved in ion channel complexes such as KCNIP3 (potassium voltage-gated channel interacting protein 3) and CACNG2 (calcium voltage-gated channel auxiliary subunit gamma 2) are downregulated in the ACC. We identified significant protein expression changes in the mechanistic target of rapamycin (mTOR) canonical pathway between control and ethanol-induced impulsive mice. Impulsive mice showed over 60% of proteins involved in the mTOR canonical pathway have been altered. This pathway has been previously implicated in the neuroadaptation in drugs of abuse and impulsivity. We found substantial changes in the protein levels involved in neurological disorders such as schizophrenia and Alzheimer's disease. Our findings provide a neuroproteomic profile of ethanol-induced impulsive mice.
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18
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Sossin WS, Costa-Mattioli M. Translational Control in the Brain in Health and Disease. Cold Spring Harb Perspect Biol 2019; 11:cshperspect.a032912. [PMID: 30082469 DOI: 10.1101/cshperspect.a032912] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Translational control in neurons is crucially required for long-lasting changes in synaptic function and memory storage. The importance of protein synthesis control to brain processes is underscored by the large number of neurological disorders in which translation rates are perturbed, such as autism and neurodegenerative disorders. Here we review the general principles of neuronal translation, focusing on the particular relevance of several key regulators of nervous system translation, including eukaryotic initiation factor 2α (eIF2α), the mechanistic (or mammalian) target of rapamycin complex 1 (mTORC1), and the eukaryotic elongation factor 2 (eEF2). These pathways regulate the overall rate of protein synthesis in neurons and have selective effects on the translation of specific messenger RNAs (mRNAs). The importance of these general and specific translational control mechanisms is considered in the normal functioning of the nervous system, particularly during synaptic plasticity underlying memory, and in the context of neurological disorders.
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Affiliation(s)
- Wayne S Sossin
- Montreal Neurological Institute, McGill University, Montreal, Quebec H3A-2B4, Canada
| | - Mauro Costa-Mattioli
- Department of Neuroscience, Memory and Brain Research Center, Baylor College of Medicine, Houston, Texas 77030
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19
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Abstract
Although historically research has focused on transcription as the central governor of protein expression, protein translation is now increasingly being recognized as a major factor for determining protein levels within cells. The central nervous system relies on efficient updating of the protein landscape. Thus, coordinated regulation of mRNA localization, initiation, or termination of translation is essential for proper brain function. In particular, dendritic protein synthesis plays a key role in synaptic plasticity underlying learning and memory as well as cognitive processes. Increasing evidence suggests that impaired mRNA translation is a common feature found in numerous psychiatric disorders. In this review, we describe how malfunction of translation contributes to development of psychiatric diseases, including schizophrenia, major depression, bipolar disorder, and addiction.
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Affiliation(s)
- Sophie Laguesse
- Department of Neurology, University of California San Francisco, San Francisco, CA, USA.,GIGA-Neurosciences, GIGA-Stem Cells, University of Liège, Liège, Belgium
| | - Dorit Ron
- Department of Neurology, University of California San Francisco, San Francisco, CA, USA
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20
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Delaidelli A, Jan A, Herms J, Sorensen PH. Translational control in brain pathologies: biological significance and therapeutic opportunities. Acta Neuropathol 2019; 137:535-555. [PMID: 30739199 DOI: 10.1007/s00401-019-01971-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2018] [Revised: 01/30/2019] [Accepted: 02/04/2019] [Indexed: 12/13/2022]
Abstract
Messenger RNA (mRNA) translation is the terminal step in protein synthesis, providing a crucial regulatory checkpoint for this process. Translational control allows specific cell types to respond to rapid changes in the microenvironment or to serve specific functions. For example, neurons use mRNA transport to achieve local protein synthesis at significant distances from the nucleus, the site of RNA transcription. Altered expression or functions of the various components of the translational machinery have been linked to several pathologies in the central nervous system. In this review, we provide a brief overview of the basic principles of mRNA translation, and discuss alterations of this process relevant to CNS disease conditions, with a focus on brain tumors and chronic neurological conditions. Finally, synthesizing this knowledge, we discuss the opportunities to exploit the biology of altered mRNA translation for novel therapies in brain disorders, as well as how studying these alterations can shed new light on disease mechanisms.
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Affiliation(s)
- Alberto Delaidelli
- Department of Molecular Oncology, British Columbia Cancer Research Centre, Vancouver, BC, V5Z 1L3, Canada.
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada.
| | - Asad Jan
- Department of Biomedicine, Aarhus Institute of Advanced Studies, Aarhus University, Høegh-Guldbergs Gade 6B, 8000, Aarhus C, Denmark
| | - Jochen Herms
- Department for Translational Brain Research, German Center for Neurodegenerative Diseases (DZNE), Munich, Germany
- Center for Neuropathology and Prion Research, Ludwig-Maximilians-University, Munich, Germany
- Munich Cluster of Systems Neurology (SyNergy), Ludwig-Maximilians-University Munich, Schillerstraße 44, 80336, Munich, Germany
| | - Poul H Sorensen
- Department of Molecular Oncology, British Columbia Cancer Research Centre, Vancouver, BC, V5Z 1L3, Canada.
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, V6T 1Z3, Canada.
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21
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Mao D, Lin G, Tepe B, Zuo Z, Tan KL, Senturk M, Zhang S, Arenkiel BR, Sardiello M, Bellen HJ. VAMP associated proteins are required for autophagic and lysosomal degradation by promoting a PtdIns4P-mediated endosomal pathway. Autophagy 2019; 15:1214-1233. [PMID: 30741620 DOI: 10.1080/15548627.2019.1580103] [Citation(s) in RCA: 40] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Mutations in the ER-associated VAPB/ALS8 protein cause amyotrophic lateral sclerosis and spinal muscular atrophy. Previous studies have argued that ER stress may underlie the demise of neurons. We find that loss of VAP proteins (VAPs) leads to an accumulation of aberrant lysosomes and impairs lysosomal degradation. VAPs mediate ER to Golgi tethering and their loss may affect phosphatidylinositol-4-phosphate (PtdIns4P) transfer between these organelles. We found that loss of VAPs elevates PtdIns4P levels in the Golgi, leading to an expansion of the endosomal pool derived from the Golgi. Fusion of these endosomes with lysosomes leads to an increase in lysosomes with aberrant acidity, contents, and shape. Importantly, reducing PtdIns4P levels with a PtdIns4-kinase (PtdIns4K) inhibitor, or removing a single copy of Rab7, suppress macroautophagic/autophagic degradation defects as well as behavioral defects observed in Drosophila Vap33 mutant larvae. We propose that a failure to tether the ER to the Golgi when VAPs are lost leads to an increase in Golgi PtdIns4P levels, and an expansion of endosomes resulting in an accumulation of dysfunctional lysosomes and a failure in proper autophagic lysosomal degradation. Abbreviations: ALS: amyotrophic lateral sclerosis; CSF: cerebrospinal fluid; CERT: ceramide transfer protein; FFAT: two phenylalanines in an acidic tract; MSP: major sperm proteins; OSBP: oxysterol binding protein; PH: pleckstrin homology; PtdIns4P: phosphatidylinositol-4-phosphate; PtdIns4K: phosphatidylinositol 4-kinase; UPR: unfolded protein response; VAMP: vesicle-associated membrane protein; VAPA/B: mammalian VAPA and VAPB proteins; VAPs: VAMP-associated proteins (referring to Drosophila Vap33, and human VAPA and VAPB).
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Affiliation(s)
- Dongxue Mao
- a Program in Developmental Biology , Baylor College of Medicine , Houston , TX , USA
| | - Guang Lin
- b Department of Molecular and Human Genetics , Baylor College of Medicine , Houston , TX , USA
| | - Burak Tepe
- a Program in Developmental Biology , Baylor College of Medicine , Houston , TX , USA
| | - Zhongyuan Zuo
- b Department of Molecular and Human Genetics , Baylor College of Medicine , Houston , TX , USA
| | - Kai Li Tan
- a Program in Developmental Biology , Baylor College of Medicine , Houston , TX , USA
| | - Mumine Senturk
- a Program in Developmental Biology , Baylor College of Medicine , Houston , TX , USA
| | - Sheng Zhang
- c The Brown Foundation Institute of Molecular Medicine , University of Texas McGovern Medical School at Houston , Houston , TX , USA.,d Department of Neurobiology and Anatomy , University of Texas McGovern Medical School at Houston , Houston , TX , USA.,e Programs in Genetics & Epigenetics and Neuroscience , University of Texas MD Anderson Cancer Center UTHealth Graduate School of Biomedical Sciences (MD Anderson UTHealth GSBS) , Houston , TX , USA
| | - Benjamin R Arenkiel
- a Program in Developmental Biology , Baylor College of Medicine , Houston , TX , USA.,b Department of Molecular and Human Genetics , Baylor College of Medicine , Houston , TX , USA.,f Texas Children's Hospital , Jan and Dan Duncan Neurological Research Institute , Houston , TX , USA.,g Department of Neuroscience , Baylor College of Medicine , Houston , TX , USA
| | - Marco Sardiello
- b Department of Molecular and Human Genetics , Baylor College of Medicine , Houston , TX , USA.,f Texas Children's Hospital , Jan and Dan Duncan Neurological Research Institute , Houston , TX , USA
| | - Hugo J Bellen
- a Program in Developmental Biology , Baylor College of Medicine , Houston , TX , USA.,b Department of Molecular and Human Genetics , Baylor College of Medicine , Houston , TX , USA.,f Texas Children's Hospital , Jan and Dan Duncan Neurological Research Institute , Houston , TX , USA.,g Department of Neuroscience , Baylor College of Medicine , Houston , TX , USA.,h Baylor College of Medicine , Howard Hughes Medical Institute , Houston , TX , USA
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22
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Stefanik MT, Sakas C, Lee D, Wolf ME. Ionotropic and metabotropic glutamate receptors regulate protein translation in co-cultured nucleus accumbens and prefrontal cortex neurons. Neuropharmacology 2018; 140:62-75. [PMID: 30077883 DOI: 10.1016/j.neuropharm.2018.05.032] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2018] [Revised: 05/15/2018] [Accepted: 05/29/2018] [Indexed: 01/14/2023]
Abstract
The regulation of protein translation by glutamate receptors and its role in plasticity have been extensively studied in the hippocampus. In contrast, very little is known about glutamatergic regulation of translation in nucleus accumbens (NAc) medium spiny neurons (MSN), despite their critical role in addiction-related plasticity and recent evidence that protein translation contributes to this plasticity. We used a co-culture system, containing NAc MSNs and prefrontal cortex (PFC) neurons, and fluorescent non-canonical amino acid tagging (FUNCAT) to visualize newly synthesized proteins in neuronal processes of NAc MSNs and PFC pyramidal neurons. First, we verified that the FUNCAT signal reflects new protein translation. Next, we examined the regulation of translation by group I metabotropic glutamate receptors (mGluRs) and ionotropic glutamate receptors by incubating co-cultures with agonists or antagonists during the 2-h period of non-canonical amino acid labeling. In NAc MSNs, basal translation was modestly reduced by blocking Ca2+-permeable AMPARs whereas blocking all AMPARs or suppressing constitutive mGluR5 signaling enhanced translation. Activating group I mGluRs with dihydroxyphenylglycine increased translation in an mGluR1-dependent manner in NAc MSNs and PFC pyramidal neurons. Disinhibiting excitatory transmission with bicuculline also increased translation. In MSNs, this was reversed by antagonists of mGluR1, mGluR5, AMPARs or NMDARs. In PFC neurons, AMPAR or NMDAR antagonists blocked bicuculline-stimulated translation. Our study, the first to examine glutamatergic regulation of translation in MSNs, demonstrates regulatory mechanisms specific to MSNs that depend on the level of neuronal activation. This sets the stage for understanding how translation may be altered in addiction.
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Affiliation(s)
- Michael T Stefanik
- Department of Neuroscience, The Chicago Medical School at Rosalind Franklin University of Medicine and Science, North Chicago, IL, 60064, USA
| | - Courtney Sakas
- Department of Neuroscience, The Chicago Medical School at Rosalind Franklin University of Medicine and Science, North Chicago, IL, 60064, USA
| | - Dennis Lee
- Department of Neuroscience, The Chicago Medical School at Rosalind Franklin University of Medicine and Science, North Chicago, IL, 60064, USA
| | - Marina E Wolf
- Department of Neuroscience, The Chicago Medical School at Rosalind Franklin University of Medicine and Science, North Chicago, IL, 60064, USA.
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23
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Melas PA, Qvist JS, Deidda M, Upreti C, Wei YB, Sanna F, Fratta W, Scherma M, Fadda P, Kandel DB, Kandel ER. Cannabinoid Modulation of Eukaryotic Initiation Factors (eIF2α and eIF2B1) and Behavioral Cross-Sensitization to Cocaine in Adolescent Rats. Cell Rep 2018. [DOI: 10.1016/j.celrep.2018.02.065] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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24
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Protein Translation in the Nucleus Accumbens Is Dysregulated during Cocaine Withdrawal and Required for Expression of Incubation of Cocaine Craving. J Neurosci 2018; 38:2683-2697. [PMID: 29431650 DOI: 10.1523/jneurosci.2412-17.2018] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2017] [Revised: 01/08/2018] [Accepted: 01/31/2018] [Indexed: 01/11/2023] Open
Abstract
Exposure to drug-associated cues can induce drug craving and relapse in abstinent addicts. Cue-induced craving that progressively intensifies ("incubates") during withdrawal from cocaine has been observed in both rats and humans. Building on recent evidence that aberrant protein translation underlies incubation-related adaptations in the NAc, we used male rats to test the hypothesis that translation is dysregulated during cocaine withdrawal and/or when rats express incubated cocaine craving. We found that intra-NAc infusion of anisomycin, a general protein translation inhibitor, or rapamycin, an inhibitor of mammalian target of rapamycin, reduced the expression of incubated cocaine craving, consistent with previous results showing that inhibition of translation in slices normalized the adaptations that maintain incubation. We then examined signaling pathways involved in protein translation using NAc synaptoneurosomes prepared after >47 d of withdrawal from cocaine or saline self-administration, or after withdrawal plus a cue-induced seeking test. The most robust changes were observed following seeking tests. Most notably, we found that eukaryotic elongation factor 2 (eEF2) and eukaryotic initiation factor 2α (eIF2α) are dephosphorylated when cocaine rats undergo a cue-induced seeking test; both effects are consistent with increased translation during the test. Blocking eIF2α dephosphorylation and thereby restoring its inhibitory influence on translation, via intra-NAc injection of Sal003 just before the test, substantially reduced cocaine seeking. These results are consistent with dysregulation of protein translation in the NAc during cocaine withdrawal, enabling cocaine cues to elicit an aberrant increase in translation that is required for the expression of incubated cocaine craving.SIGNIFICANCE STATEMENT Cue-induced cocaine craving progressively intensifies (incubates) during withdrawal in both humans and rats. This may contribute to persistent vulnerability to relapse. We previously demonstrated a role for protein translation in synaptic adaptations in the NAc closely linked to incubation. Here, we tested the hypothesis that translation is dysregulated during cocaine withdrawal, and this contributes to incubated craving. Analysis of signaling pathways regulating translation suggested that translation is enhanced when "incubated" rats undergo a cue-induced seeking test. Furthermore, intra-NAc infusions of drugs that inhibit protein translation through different mechanisms reduced expression of incubated cue-induced cocaine seeking. These results demonstrate that the expression of incubation depends on an acute increase in translation that may result from dysregulation of several pathways.
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Inhibition of the integrated stress response reverses cognitive deficits after traumatic brain injury. Proc Natl Acad Sci U S A 2017; 114:E6420-E6426. [PMID: 28696288 DOI: 10.1073/pnas.1707661114] [Citation(s) in RCA: 145] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Traumatic brain injury (TBI) is a leading cause of long-term neurological disability, yet the mechanisms underlying the chronic cognitive deficits associated with TBI remain unknown. Consequently, there are no effective treatments for patients suffering from the long-lasting symptoms of TBI. Here, we show that TBI persistently activates the integrated stress response (ISR), a universal intracellular signaling pathway that responds to a variety of cellular conditions and regulates protein translation via phosphorylation of the translation initiation factor eIF2α. Treatment with ISRIB, a potent drug-like small-molecule inhibitor of the ISR, reversed the hippocampal-dependent cognitive deficits induced by TBI in two different injury mouse models-focal contusion and diffuse concussive injury. Surprisingly, ISRIB corrected TBI-induced memory deficits when administered weeks after the initial injury and maintained cognitive improvement after treatment was terminated. At the physiological level, TBI suppressed long-term potentiation in the hippocampus, which was fully restored with ISRIB treatment. Our results indicate that ISR inhibition at time points late after injury can reverse memory deficits associated with TBI. As such, pharmacological inhibition of the ISR emerges as a promising avenue to combat head trauma-induced chronic cognitive deficits.
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Lindholm D, Korhonen L, Eriksson O, Kõks S. Recent Insights into the Role of Unfolded Protein Response in ER Stress in Health and Disease. Front Cell Dev Biol 2017; 5:48. [PMID: 28540288 PMCID: PMC5423914 DOI: 10.3389/fcell.2017.00048] [Citation(s) in RCA: 141] [Impact Index Per Article: 20.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Accepted: 04/13/2017] [Indexed: 12/20/2022] Open
Abstract
Unfolded stress response (UPR) is a conserved cellular pathway involved in protein quality control to maintain homeostasis under different conditions and disease states characterized by cell stress. Although three general schemes of and genes induced by UPR are rather well-established, open questions remain including the precise role of UPR in human diseases and the interactions between different sensor systems during cell stress signaling. Particularly, the issue how the normally adaptive and pro-survival UPR pathway turns into a deleterious process causing sustained endoplasmic reticulum (ER) stress and cell death requires more studies. UPR is also named a friend with multiple personalities that we need to understand better to fully recognize its role in normal physiology and in disease pathology. UPR interacts with other organelles including mitochondria, and with cell stress signals and degradation pathways such as autophagy and the ubiquitin proteasome system. Here we review current concepts and mechanisms of UPR as studied in different cells and model systems and highlight the relevance of UPR and related stress signals in various human diseases.
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Affiliation(s)
- Dan Lindholm
- Medicum, Department of Biochemistry and Developmental Biology, Faculty of Medicine, University of HelsinkiHelsinki, Finland.,Minerva Foundation Institute for Medical ResearchHelsinki, Finland
| | - Laura Korhonen
- Minerva Foundation Institute for Medical ResearchHelsinki, Finland.,Division of Child Psychiatry, Helsinki University Central HospitalHelsinki, Finland
| | - Ove Eriksson
- Medicum, Department of Biochemistry and Developmental Biology, Faculty of Medicine, University of HelsinkiHelsinki, Finland
| | - Sulev Kõks
- Department of Pathophysiology, University of TartuTartu, Estonia.,Department of Reproductive Biology, Estonian University of Life SciencesTartu, Estonia
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