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Wang L, Aton SJ. Perspective - ultrastructural analyses reflect the effects of sleep and sleep loss on neuronal cell biology. Sleep 2022; 45:zsac047. [PMID: 35554582 PMCID: PMC9113019 DOI: 10.1093/sleep/zsac047] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Revised: 02/05/2022] [Indexed: 11/13/2022] Open
Abstract
Recent electron microscopic analyses of neurons in the Drosophila and rodent brain demonstrate that acute or chronic sleep loss can alter the structures of various organelles, including mitochondria, nucleus, and Golgi apparatus. Here, we discuss these findings in the context of biochemical findings from the sleep deprived brain, to clarify how these morphological changes may related to altered organelle function. We discuss how, taken together, the available data suggest that sleep loss (particularly chronic sleep loss) disrupts such fundamental cellular processes as transcription, translation, intracellular transport, and metabolism. A better understanding of these effects will have broad implications for understanding the biological importance of sleep, and the relationship of sleep loss to neuropathology.
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Affiliation(s)
- Lijing Wang
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
| | - Sara J Aton
- Department of Molecular, Cellular, and Developmental Biology, University of Michigan, Ann Arbor, MI, USA
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2
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Carpena MX, Bonilla C, Matijasevich A, Martins-Silva T, Genro JP, Hutz MH, Rohde LA, Tovo-Rodrigues L. Sleep-related traits and attention-deficit/hyperactivity disorder comorbidity: Shared genetic risk factors, molecular mechanisms, and causal effects. World J Biol Psychiatry 2021; 22:778-791. [PMID: 33821771 DOI: 10.1080/15622975.2021.1907719] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
OBJECTIVES To evaluate the shared genetic components, common pathways and causal relationship between ADHD and sleep-related phenotypes. METHODS We used the largest genome-wide association summary statistics available for attention-deficit/hyperactivity disorder (ADHD) and various sleep-related phenotypes (insomnia, napping, daytime dozing, snoring, ease getting up, daytime sleepiness, sleep duration and chronotype). We estimated the genomic correlation using cross-trait linkage disequilibrium score regression (LDSR) and investigated the potential common mechanisms using gene-based cross-trait metanalyses and functional enrichment analyses. The causal effect was estimated using two-sample Mendelian randomisation (TSMR), using the inverse variance weighted method as the main estimator. RESULTS A positive genomic correlation between insomnia, daytime napping, daytime dozing, snoring, daytime sleepiness, short and long sleep duration, and ADHD was observed. Insomnia, daytime sleepiness, and snoring shared genes with ADHD, that are involved in neurobiological functions and regulatory signalling pathways. The TSMR supported a causal effect of insomnia, daytime napping, and short sleep duration on ADHD, and of ADHD on long sleep duration and chronotype. CONCLUSION Comorbidity between sleep phenotypes and ADHD may be mediated by common genetic factors that play an important role in neuronal signalling pathways. A causal effect of sleep disturbances and short sleep duration on ADHD reinforced their role as predictors of ADHD.
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Affiliation(s)
- Marina Xavier Carpena
- Post-Graduate Program in Epidemiology, Federal University of Pelotas, Pelotas, Brazil
| | - Carolina Bonilla
- Departamento de Medicina Preventiva, Faculdade de Medicina FMUSP, Universidade de São Paulo, SP, Brasil.,Population Health Sciences, University of Bristol, Bristol, UK
| | - Alicia Matijasevich
- Post-Graduate Program in Epidemiology, Federal University of Pelotas, Pelotas, Brazil.,Departamento de Medicina Preventiva, Faculdade de Medicina FMUSP, Universidade de São Paulo, SP, Brasil
| | - Thais Martins-Silva
- Post-Graduate Program in Epidemiology, Federal University of Pelotas, Pelotas, Brazil
| | - Julia P Genro
- Graduate Program in Biosciences, Universidade Federal de Ciências da Saúde de Porto Alegre, Porto Alegre, Brazil
| | - Mara Helena Hutz
- Department of Genetics, Federal University of Rio Grande do Sul, Porto Alegre, Brazil
| | - Luis Augusto Rohde
- Federal University of Rio Grande do Sul, Department of Psychiatry, Child & Adolescent Psychiatry Unit, Hospital de Clinicas de Porto Alegre, Porto Alegre, Brazil
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3
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Wu X, Bai F, Wang Y, Zhang L, Liu L, Chen Y, Li H, Zhang T. Circadian Rhythm Disorders and Corresponding Functional Brain Abnormalities in Young Female Nurses: A Preliminary Study. Front Neurol 2021; 12:664610. [PMID: 33995261 PMCID: PMC8120025 DOI: 10.3389/fneur.2021.664610] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2021] [Accepted: 04/08/2021] [Indexed: 11/13/2022] Open
Abstract
Objective: Shift work is associated with a decrease in melatonin level and perturbation of the circadian rhythm; however, it is unknown if these lead to functional brain changes. In this study, we investigated whether circadian rhythm disorders caused by shift work are related to changes in brain functional connectivity (FC) and regional homogeneity (ReHo) using whole-brain resting-state functional magnetic resonance imaging (fMRI). Methods: This prospective case-control study included nine female night shift nurses and nine age-matched female day work nurses with normal sleep rhythms. To assess sleep quality and mood, participants were asked to complete questionnaires. Serum melatonin and cortisol levels were measured. ReHo of whole-brain resting-state function and seed-based FC of the bilateral hypothalamus were compared between groups. Variables that differed significantly between groups were used to examine the association between questionnaire scores and hormone levels and fMRI data. Results: The night shift nurses had significantly lower sleep quality and melatonin levels; lower ReHo activation in the bilateral cerebellar hemisphere and higher ReHo in the bilateral occipital lobe and left parietal lobe; and higher FC from the hypothalamus to the right cingulate gyrus, right putamen, and vermis than did the day shift nurses. Activation of the right cerebellar hemisphere left superior parietal gyrus, and the right superior occipital gyrus was correlated with sleep quality scores. Moreover, activation of the right cerebellar hemisphere (r = 0.583, P = 0.011) was correlated with melatonin levels, and higher sleepiness scores were associated with stronger FC between the hypothalamus and vermis (r = 0.501, P = 0.034). Conclusions: Circadian rhythm disorder caused by night shift work can lead to a decrease in sleep quality and melatonin level, as well as a series of changes in brain FC and ReHo.
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Affiliation(s)
- Xiaoli Wu
- Department of Neurorehabilitation, Rehabilitation Medicine of Capital Medical University, China Rehabilitation Research Centre, Beijing, China
| | - Fan Bai
- China Rehabilitation Science Institute of China Rehabilitation Research Centre, Beijing, China.,Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
| | - Yunlei Wang
- China Rehabilitation Science Institute of China Rehabilitation Research Centre, Beijing, China.,Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
| | - Lu Zhang
- Department of Neurorehabilitation, Rehabilitation Medicine of Capital Medical University, China Rehabilitation Research Centre, Beijing, China
| | - Lixu Liu
- Department of Neurorehabilitation, Rehabilitation Medicine of Capital Medical University, China Rehabilitation Research Centre, Beijing, China
| | - Yudong Chen
- Department of Neurorehabilitation, Rehabilitation Medicine of Capital Medical University, China Rehabilitation Research Centre, Beijing, China
| | - Hanzhi Li
- Department of Neurorehabilitation, Rehabilitation Medicine of Capital Medical University, China Rehabilitation Research Centre, Beijing, China
| | - Tong Zhang
- Department of Neurorehabilitation, Rehabilitation Medicine of Capital Medical University, China Rehabilitation Research Centre, Beijing, China.,China Rehabilitation Science Institute of China Rehabilitation Research Centre, Beijing, China.,Beijing Key Laboratory of Neural Injury and Rehabilitation, Beijing, China
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4
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Ma T, Zhang H, Xu ZP, Lu Y, Fu Q, Wang W, Li GH, Wang YY, Yang YT, Mi WD. Activation of brain-derived neurotrophic factor signaling in the basal forebrain reverses acute sleep deprivation-induced fear memory impairments. Brain Behav 2020; 10:e01592. [PMID: 32157827 PMCID: PMC7177564 DOI: 10.1002/brb3.1592] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2019] [Revised: 01/15/2020] [Accepted: 02/15/2020] [Indexed: 12/22/2022] Open
Abstract
INTRODUCTION The mechanisms underlying sleep deprivation-induced memory impairments and relevant compensatory signaling pathways remain elusive. We tested the hypothesis that increased brain-derived neurotrophic factor (BDNF) expression in the basal forebrain following acute sleep deprivation was a compensatory mechanism to maintain fear memory performance. METHODS Adult male Wistar rats were deprived of 6-hr total sleep from the beginning of the light cycle. The effects of sleep deprivation on BDNF protein expression and activation of downstream tropomyosin receptor kinase B (TrkB)/phospholipase C-γ1 (PLCγ1) signaling in the basal forebrain and fear memory consolidation were examined. BDNF or selective downstream TrkB receptor antagonist ANA-12 was further injected into the basal forebrain bilaterally to observe the changes in fear memory consolidation in response to modulation of the BDNF/TrkB signaling. RESULTS Six hours of sleep deprivation-induced both short- and long-term fear memory impairments. Increased BDNF protein expression and TrkB and PLCγ1 phosphorylation in the basal forebrain were observed after sleep deprivation. Microinjection of BDNF into the basal forebrain partly reversed fear memory deficits caused by sleep deprivation, which were accompanied by increased BDNF protein levels and TrkB/PLCγ1 activation. After ANA-12 microinjection, sleep deprivation-induced activation of the BDNF/TrkB pathway was inhibited and impairments of fear memory consolidation were further aggravated. CONCLUSIONS Acute sleep deprivation induces compensatory increase of BDNF expression in the basal forebrain. Microinjection of BDNF into the basal forebrain mitigates the fear memory impairments caused by sleep deprivation by activating TrkB/PLCγ1 signaling.
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Affiliation(s)
- Tao Ma
- Anesthesia and Operation Center, Chinese PLA Medical School, Beijing, China.,Department of Anesthesiology, PLA Rocket Force Characteristic Medical Center, Beijing, China
| | - Hao Zhang
- Department of Anesthesiology, PLA Rocket Force Characteristic Medical Center, Beijing, China
| | - Zhi-Peng Xu
- Anesthesia and Operation Center, Chinese PLA Medical School, Beijing, China
| | - Yan Lu
- Department of Neurology, PLA Rocket Force Characteristic Medical Center, Beijing, China
| | - Qiang Fu
- Anesthesia and Operation Center, Chinese PLA Medical School, Beijing, China
| | - Wei Wang
- Department of Anesthesiology, PLA Rocket Force Characteristic Medical Center, Beijing, China
| | - Guan-Hua Li
- Department of Anesthesiology, PLA Rocket Force Characteristic Medical Center, Beijing, China
| | - Ying-Ying Wang
- Department of Anesthesiology, PLA Rocket Force Characteristic Medical Center, Beijing, China.,PLA Rocket Force Characteristic Medical Center, Postgraduate Training Base of Jinzhou Medical University, Beijing, China
| | - Yi-Tian Yang
- Anesthesia and Operation Center, Chinese PLA Medical School, Beijing, China
| | - Wei-Dong Mi
- Anesthesia and Operation Center, Chinese PLA Medical School, Beijing, China
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5
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The Brain-Derived Neurotrophic Factor: Missing Link Between Sleep Deprivation, Insomnia, and Depression. Neurochem Res 2019; 45:221-231. [PMID: 31782101 DOI: 10.1007/s11064-019-02914-1] [Citation(s) in RCA: 69] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2019] [Revised: 11/08/2019] [Accepted: 11/17/2019] [Indexed: 12/15/2022]
Abstract
The brain-derived neurotrophic factor (BDNF) mediates the plasticity-related changes that associate with memory processing during sleep. Sleep deprivation and chronic stress are associated with propensity to depression, anxiety, and insomnia. We propose a model by which explain alterations in the CNS and serum expression of BDNF associated with chronic sleep deprivation, depression, and insomnia. Mild sleep deprivation activates the cerebral cortex and brainstem to generate the physiologic drive for non-rapid eye movement (NREM) and rapid eye movement (REM) sleep drive respectively, associated with BDNF upregulation in these regions. This physiological response loses effectiveness with longer episodes or during chronic of total or selective REM sleep loss, which are associated with impaired hippocampal BDNF expression, impaired memory and cognition. Chronic sleep deprivation and insomnia can act as an external stressors and result in depression, characterized by hippocampal BDNF downregulation along with disrupted frontal cortical BDNF expression, as well as reduced levels and impaired diurnal alterations in serum BDNF expression. Acute REM sleep deprivation breaks the cycle by restoration of hippocampal, and possibly restoration of cortical and serum expression of BDNF. The BDNF Val66Met polymorphism alters susceptibility to depression, anxiety, and insomnia by altering availability and expression of BDNF in brain and blood. The proposed model is testable and implies that low levels and low variability in serum BDNF are associated with poor response to anti-depressive medications, electroconvulsive therapy, and REM sleep deprivation, in patients with depression. Our mode is also backed up by the existing clinical evidence but is yet to be investigated.
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6
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Doherty TS, Bozeman AL, Roth TL, Brumley MR. DNA methylation and behavioral changes induced by neonatal spinal transection. Infant Behav Dev 2019; 57:101381. [PMID: 31557646 PMCID: PMC6878986 DOI: 10.1016/j.infbeh.2019.101381] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 08/15/2019] [Accepted: 09/11/2019] [Indexed: 02/06/2023]
Abstract
Although the importance of epigenetic mechanisms in behavioral development has been gaining attention in recent years, research has largely focused on the brain. To our knowledge, no studies to date have investigated epigenetic changes in the developing spinal cord to determine the dynamic manner in which the spinal epigenome may respond to environmental input during behavioral development. Animal studies demonstrate that spinal cord plasticity is heightened during early development, is somewhat preserved following neonatal transection, and that spinal injured animals are responsive to sensory feedback. Because epigenetic alterations have been implicated in brain plasticity and are highly responsive to experience, these alterations are promising candidates for molecular substrates of spinal plasticity as well. Thus, the current study investigated behavioral changes in the development of weight-bearing locomotion and epigenetic modifications in the spinal cord of infant rats following a neonatal low-thoracic spinal transection or sham surgery on postnatal day (P)1. Specifically, global levels of methylation and methylation status of the brain-derived neurotrophic factor (Bdnf) gene, a neurotrophin heavily involved in both CNS and behavioral plasticity, particularly in development, were examined in lumbar tissue harvested on P10 from sham and spinal-transected subjects. Behavioral results demonstrate that compared to shams, spinal-transected subjects exhibit significantly reduced partial-weight bearing hindlimb activity. Molecular data demonstrate group differences in global lumbar methylation levels as well as exon-specific group differences in Bdnf methylation. This study represents an initial step toward understanding the relationship between epigenetic mechanisms and plasticity associated with spinal cord and locomotor development.
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Affiliation(s)
- Tiffany S Doherty
- Department of Psychological and Brain Sciences, University of Delaware, Newark, DE, 19716, United States
| | - Aimee L Bozeman
- Department of Psychology, Idaho State University, Pocatello, ID, 83209, United States
| | - Tania L Roth
- Department of Psychological and Brain Sciences, University of Delaware, Newark, DE, 19716, United States
| | - Michele R Brumley
- Department of Psychology, Idaho State University, Pocatello, ID, 83209, United States.
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7
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Lahtinen A, Puttonen S, Vanttola P, Viitasalo K, Sulkava S, Pervjakova N, Joensuu A, Salo P, Toivola A, Härmä M, Milani L, Perola M, Paunio T. A distinctive DNA methylation pattern in insufficient sleep. Sci Rep 2019; 9:1193. [PMID: 30718923 PMCID: PMC6362278 DOI: 10.1038/s41598-018-38009-0] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2018] [Accepted: 12/17/2018] [Indexed: 12/11/2022] Open
Abstract
Short sleep duration or insomnia may lead to an increased risk of various psychiatric and cardio-metabolic conditions. Since DNA methylation plays a critical role in the regulation of gene expression, studies of differentially methylated positions (DMPs) might be valuable for understanding the mechanisms underlying insomnia. We performed a cross-sectional genome-wide analysis of DNA methylation in relation to self-reported insufficient sleep in individuals from a community-based sample (79 men, aged 39.3 ± 7.3), and in relation to shift work disorder in an occupational cohort (26 men, aged 44.9 ± 9.0). The analysis of DNA methylation data revealed that genes corresponding to selected DMPs form a distinctive pathway: "Nervous System Development" (FDR P value < 0.05). We found that 78% of the DMPs were hypomethylated in cases in both cohorts, suggesting that insufficient sleep may be associated with loss of DNA methylation. A karyoplot revealed clusters of DMPs at various chromosomal regions, including 12 DMPs on chromosome 17, previously associated with Smith-Magenis syndrome, a rare condition comprising disturbed sleep and inverse circadian rhythm. Our findings give novel insights into the DNA methylation patterns associated with sleep loss, possibly modifying processes related to neuroplasticity and neurodegeneration. Future prospective studies are needed to confirm the observed associations.
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Affiliation(s)
- Alexandra Lahtinen
- Department of Public Health Solutions, Genomics and Biomarkers Unit, National Institute for Health and Welfare, PO Box 30, FI-00271, Helsinki, Finland.
- Department of Psychiatry, University of Helsinki and Helsinki University Central Hospital, PO Box 590, FIN-00029, HUS, Helsinki, Finland.
| | - Sampsa Puttonen
- Work Ability and Working Career, Finnish Institute of Occupational Health, PO Box 40, FI-00032, Työterveyslaitos, Helsinki, Finland
| | - Päivi Vanttola
- Work Ability and Working Career, Finnish Institute of Occupational Health, PO Box 40, FI-00032, Työterveyslaitos, Helsinki, Finland
| | | | - Sonja Sulkava
- Department of Public Health Solutions, Genomics and Biomarkers Unit, National Institute for Health and Welfare, PO Box 30, FI-00271, Helsinki, Finland
- Department of Psychiatry, University of Helsinki and Helsinki University Central Hospital, PO Box 590, FIN-00029, HUS, Helsinki, Finland
| | - Natalia Pervjakova
- Estonian Genome Center, Institute of Genomics, University of Tartu, Tartu, 51010, Estonia
| | - Anni Joensuu
- Department of Public Health Solutions, Genomics and Biomarkers Unit, National Institute for Health and Welfare, PO Box 30, FI-00271, Helsinki, Finland
- Diabetes and Obesity Research Program, University of Helsinki, PO Box 63, FI-00014, Helsinki, Finland
| | - Perttu Salo
- Department of Public Health Solutions, Genomics and Biomarkers Unit, National Institute for Health and Welfare, PO Box 30, FI-00271, Helsinki, Finland
| | - Auli Toivola
- Department of Public Health Solutions, Genomics and Biomarkers Unit, National Institute for Health and Welfare, PO Box 30, FI-00271, Helsinki, Finland
| | - Mikko Härmä
- Work Ability and Working Career, Finnish Institute of Occupational Health, PO Box 40, FI-00032, Työterveyslaitos, Helsinki, Finland
| | - Lili Milani
- Estonian Genome Center, Institute of Genomics, University of Tartu, Tartu, 51010, Estonia
| | - Markus Perola
- Department of Public Health Solutions, Genomics and Biomarkers Unit, National Institute for Health and Welfare, PO Box 30, FI-00271, Helsinki, Finland
- Diabetes and Obesity Research Program, University of Helsinki, PO Box 63, FI-00014, Helsinki, Finland
| | - Tiina Paunio
- Department of Public Health Solutions, Genomics and Biomarkers Unit, National Institute for Health and Welfare, PO Box 30, FI-00271, Helsinki, Finland.
- Department of Psychiatry, University of Helsinki and Helsinki University Central Hospital, PO Box 590, FIN-00029, HUS, Helsinki, Finland.
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Akers KG, Chérasse Y, Fujita Y, Srinivasan S, Sakurai T, Sakaguchi M. Concise Review: Regulatory Influence of Sleep and Epigenetics on Adult Hippocampal Neurogenesis and Cognitive and Emotional Function. Stem Cells 2018; 36:969-976. [DOI: 10.1002/stem.2815] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2017] [Revised: 02/02/2018] [Accepted: 02/17/2018] [Indexed: 12/20/2022]
Affiliation(s)
| | - Yoan Chérasse
- International Institute for Integrative Sleep Medicine, University of Tsukuba; Tsukuba Ibaraki Japan
| | - Yuki Fujita
- Department of Molecular Neuroscience, Graduate School of Medicine; Osaka University; Suita Osaka Japan
| | - Sakthivel Srinivasan
- International Institute for Integrative Sleep Medicine, University of Tsukuba; Tsukuba Ibaraki Japan
| | - Takeshi Sakurai
- International Institute for Integrative Sleep Medicine, University of Tsukuba; Tsukuba Ibaraki Japan
| | - Masanori Sakaguchi
- International Institute for Integrative Sleep Medicine, University of Tsukuba; Tsukuba Ibaraki Japan
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9
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O'Callaghan EK, Green EW, Franken P, Mongrain V. Omics Approaches in Sleep-Wake Regulation. Handb Exp Pharmacol 2018; 253:59-81. [PMID: 29796779 DOI: 10.1007/164_2018_125] [Citation(s) in RCA: 11] [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
Although sleep seems an obvious and simple behaviour, it is extremely complex involving numerous interactions both at the neuronal and the molecular levels. While we have gained detailed insight into the molecules and neuronal networks responsible for the circadian organization of sleep and wakefulness, the molecular underpinnings of the homeostatic aspect of sleep regulation are still unknown and the focus of a considerable research effort. In the last 20 years, the development of techniques allowing the simultaneous measurement of hundreds to thousands of molecular targets (i.e. 'omics' approaches) has enabled the unbiased study of the molecular pathways regulated by and regulating sleep. In this chapter, we will review how the different omics approaches, including transcriptomics, epigenomics, proteomics, and metabolomics, have advanced sleep research. We present relevant data in the framework of the two-process model in which circadian and homeostatic processes interact to regulate sleep. The integration of the different omics levels, known as 'systems genetics', will eventually lead to a better understanding of how information flows from the genome, to molecules, to networks, and finally to sleep both in health and disease.
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Affiliation(s)
- Emma K O'Callaghan
- Center for Advanced Research in Sleep Medicine and Research Center, Hôpital du Sacré-Coeur de Montréal, Montreal, QC, Canada.,Department of Neuroscience, Université de Montréal, Montreal, QC, Canada
| | - Edward W Green
- German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Paul Franken
- Center for Integrative Genomics, University of Lausanne, Lausanne, Switzerland
| | - Valérie Mongrain
- Center for Advanced Research in Sleep Medicine and Research Center, Hôpital du Sacré-Coeur de Montréal, Montreal, QC, Canada. .,Department of Neuroscience, Université de Montréal, Montreal, QC, Canada.
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10
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BDNF mRNA abundance regulated by antidromic action potentials and AP-LTD in hippocampus. Neurosci Lett 2016; 635:97-102. [PMID: 27760383 DOI: 10.1016/j.neulet.2016.10.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2016] [Revised: 10/13/2016] [Accepted: 10/14/2016] [Indexed: 02/07/2023]
Abstract
Action-potential-induced LTD (AP-LTD) is a form of synaptic plasticity that reduces synaptic strength in CA1 hippocampal neurons firing antidromically during sharp-wave ripples. This firing occurs during slow-wave sleep and quiet moments of wakefulness, which are periods of offline replay of neural sequences learned during encoding sensory information. Here we report that rapid and persistent down-regulation of different mRNA transcripts of the BDNF gene accompanies AP-LTD, and that AP-LTD is abolished in mice with the BDNF gene knocked out in CA1 hippocampal neurons. These findings increase understanding of the mechanism of AP-LTD and the cellular mechanisms of memory consolidation.
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11
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Protocol for Methylated DNA Immunoprecipitation (MeDIP) Analysis. EPIGENETIC METHODS IN NEUROSCIENCE RESEARCH 2016. [DOI: 10.1007/978-1-4939-2754-8_6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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12
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Powell WT, LaSalle JM. Epigenetic mechanisms in diurnal cycles of metabolism and neurodevelopment. Hum Mol Genet 2015; 24:R1-9. [PMID: 26105183 DOI: 10.1093/hmg/ddv234] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Accepted: 06/18/2015] [Indexed: 11/13/2022] Open
Abstract
The circadian cycle is a genetically encoded clock that drives cellular rhythms of transcription, translation and metabolism. The circadian clock interacts with the diurnal environment that also drives transcription and metabolism during light/dark, sleep/wake, hot/cold and feast/fast daily and seasonal cycles. Epigenetic regulation provides a mechanism for cells to integrate genetic programs with environmental signals in order produce an adaptive and consistent output. Recent studies have revealed that DNA methylation is one epigenetic mechanism that entrains the circadian clock to a diurnal environment. We also review recent circadian findings in the epigenetic neurodevelopmental disorders Prader-Willi, Angelman and Rett syndromes and hypothesize a link between optimal brain development and intact synchrony between circadian and diurnal rhythms.
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Affiliation(s)
- Weston T Powell
- Medical Microbiology and Immunology, Genome Center, MIND Institute, University of California, Davis, CA 95616, USA
| | - Janine M LaSalle
- Medical Microbiology and Immunology, Genome Center, MIND Institute, University of California, Davis, CA 95616, USA
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13
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Daulatzai MA. “Boomerang Neuropathology” of Late-Onset Alzheimer’s Disease is Shrouded in Harmful “BDDS”: Breathing, Diet, Drinking, and Sleep During Aging. Neurotox Res 2015; 28:55-93. [DOI: 10.1007/s12640-015-9528-x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2014] [Revised: 04/03/2015] [Accepted: 04/03/2015] [Indexed: 12/12/2022]
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Abstract
Sleep occurs in a wide range of animal species as a vital process for the maintenance of homeostasis, metabolic restoration, physiological regulation, and adaptive cognitive functions in the central nervous system. Long-term perturbations induced by the lack of sleep are mostly mediated by changes at the level of transcription and translation. This chapter reviews studies in humans, rodents, and flies to address the various ways by which sleep deprivation affects gene expression in the nervous system, with a focus on genes related to neuronal plasticity, brain function, and cognition. However, the effects of sleep deprivation on gene expression and the functional consequences of sleep loss are clearly not restricted to the cognitive domain but may include increased inflammation, expression of stress-related genes, general impairment of protein translation, metabolic imbalance, and thermal deregulation.
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