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neuronal epigenetics

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https://www.readbyqxmd.com/read/29243911/neurodegenerative-disease-proteinopathies-are-connected-to-distinct-histone-post-translational-modification-landscapes
#1
Karen Chen, Seth A Bennett, Navin Rana, Huda Yousuf, Mohamed Said, Sadiqa Taaseen, Natalie Mendo, Steven Marc Meltser, Mariana Torrente
Amyotrophic Lateral Sclerosis (ALS) and Parkinson's disease (PD) are devastating neurodegenerative diseases involving the progressive degeneration of neurons. No cure is available for patients diagnosed with these diseases. A prominent feature for both ALS and PD is the accumulation of protein inclusions in the cytoplasm of degenerating neurons; however, the particular protein comprising these inclusions varies. The RNA-binding proteins TDP-43 and FUS are most notable in ALS, while α-synuclein aggregates into Lewy bodies in PD...
December 15, 2017: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/29239313/regulation-of-neuronal-survival-by-dna-methyltransferases
#2
REVIEW
Judit Symmank, Geraldine Zimmer
The limited regenerative capacity of neuronal cells requires tight orchestration of cell death and survival regulation in the context of longevity, age-associated diseases as well as during the development of the nervous system. Subordinate to genetic networks epigenetic mechanisms like DNA methylation and histone modifications are involved in the regulation of neuronal development, function and aging. DNA methylation by DNA methyltransferases (DNMTs), mostly correlated with gene silencing, is a dynamic and reversible process...
November 2017: Neural Regeneration Research
https://www.readbyqxmd.com/read/29236331/reduction-of-histone-marks-h3k9me3-and-h3k27me3-by-epidrug-induces-neuroendocrine-differentiation-in-prostate-cancer
#3
Eunsohl Lee, Jingcheng Wang, Younghun Jung, Frank C Cackowski, Russell S Taichman
Neuroendocrine prostate cancer (NE PCa) is an aggressive malignancy, often presenting with advanced metastasis. We previously reported that reduction of histone marks regulated by DNMT1 following epidrug (5-Azacitidine, 5-Aza) treatment controls induction of epithelial to mesenchymal (EMT) and a cancer stem cell (CSC) phenotype, which facilitates tumorigenesis in PCa cells. Here, we use the epidrug 5-Aza as a model for how histone marks may regulate the reprogramming of prostate adenocarcinoma into NE phenotypic cells...
December 13, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29235036/expression-of-dha-metabolizing-enzyme-alox15-is-regulated-by-selective-histone-acetylation-in-neuroblastoma-cells
#4
Christabel Fung-Yih Ho, Claire Poh-Ee Bon, Yee-Kong Ng, Deron R Herr, Jui-Sheng Wu, Teng-Nan Lin, Wei-Yi Ong
The omega-3 polyunsaturated fatty acid, docosahexaenoic acid (DHA) is enriched in neural membranes of the CNS, and recent studies have shown a role of DHA metabolism by 15-lipoxygenase-1 (Alox15) in prefrontal cortex resolvin D1 formation, hippocampo-prefrontal cortical long-term-potentiation, spatial working memory, and anti-nociception/anxiety. In this study, we elucidated epigenetic regulation of Alox15 via histone modifications in neuron-like cells. Treatment of undifferentiated SH-SY5Y human neuroblastoma cells with the histone deacetylase (HDAC) inhibitors trichostatin A (TSA) and sodium butyrate significantly increased Alox15 mRNA expression...
December 12, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/29231139/catechol-o-methyltransferase-cognition-and-alzheimer-s-disease
#5
Matea Nikolac Perkovic, Dubravka Svob Strac, Lucija Tudor, Marcela Konjevod, Gordana Nedic Erjavec, Nela Pivac
OBJECTIVE: Cognition is a complex trait representing a set of all mental abilities and processes related to knowledge. Although diverse brain regions are involved, most cognitive processes appear to engage cortical regions. The activity of dopaminergic neurons in prefrontal cortex represents a biological substrate underlying cognitive functions. Alzheimer's disease (AD) is the most frequent dementia associated with cognitive impairments. Cognitive impairment in AD starts slow with discrete deterioration in memory, language, thinking and reasoning, but it progresses into more severe and debilitating cognitive dysfunction...
December 11, 2017: Current Alzheimer Research
https://www.readbyqxmd.com/read/29230234/the-epigenetic-cytocrin-pathway-to-the-nucleus-epigenetic-factors-epigenetic-mediators-and-epigenetic-traits-a-biochemist-perspective
#6
Gemma Navarro, Nuria Franco, Eva Martínez-Pinilla, Rafael Franco
A single word, Epigenetics, underlies one exciting subject in today's Science, with different sides and with interactions with philosophy. The apparent trivial description includes everything in between genotype and phenotype that occurs for a given unique DNA sequence/genome. This Perspective article first presents an historical overview and the reasons for the lack of consensus in the field, which derives from different interpretations of the diverse operative definitions of Epigenetics. In an attempt to reconcile the different views, we propose a novel concept, the "cytocrin system...
2017: Frontiers in Genetics
https://www.readbyqxmd.com/read/29228394/the-psychiatric-risk-gene-transcription-factor-4-tcf4-regulates-neurodevelopmental-pathways-associated-with-schizophrenia-autism-and-intellectual-disability
#7
Marc P Forrest, Matthew J Hill, David H Kavanagh, Katherine E Tansey, Adrian J Waite, Derek J Blake
Background: Common genetic variants in and around the gene encoding transcription factor 4 (TCF4) are associated with an increased risk of schizophrenia. Conversely, rare damaging TCF4 mutations cause Pitt-Hopkins syndrome and have also been found in individuals with intellectual disability (ID) and autism spectrum disorder (ASD). Methods: Chromatin immunoprecipitation and next generation sequencing were used to identify the genomic targets of TCF4. These data were integrated with expression, epigenetic and disease gene sets using a range of computational tools...
December 8, 2017: Schizophrenia Bulletin
https://www.readbyqxmd.com/read/29228278/zinc-finger-protein-274-regulates-imprinted-expression-of-transcripts-in-prader-willi-syndrome-neurons
#8
Maéva Langouët, Heather R Glatt-Deeley, Michael S Chung, Clémence M Dupont-Thibert, Elodie Mathieux, Erin C Banda, Christopher E Stoddard, Leann Crandall, Marc Lalande
Prader-Willi syndrome (PWS) is characterized by neonatal hypotonia, developmental delay and hyperphagia/obesity and is caused by the absence of paternal contribution to chromosome 15q11-q13. Using induced pluripotent stem cell (iPSC) models of PWS, we previously discovered an epigenetic complex that is comprised of the zinc-finger protein ZNF274 and the SET domain bifurcated 1 (SETDB1) histone H3 lysine 9 (H3K9) methyltransferase and that silences the maternal alleles at the PWS locus. Here, we have knocked out ZNF274 and rescued the expression of silent maternal alleles in neurons derived from PWS iPSC lines, without affecting DNA methylation at the PWS-Imprinting Center (PWS-IC)...
December 7, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/29223816/cortex-and-hippocampus-dna-epigenetic-response-to-a-long-term-arsenic-exposure-via-drinking-water
#9
Xiaoyan Du, Meiping Tian, Xiaoxue Wang, Jie Zhang, Qingyu Huang, Liangpo Liu, Heqing Shen
The neurotoxicity of arsenic is a serious health problem, especially for children. DNA epigenetic change may be an important pathogenic mechanism, but the molecular pathway remains obscure. In this study, the weaned male Sprague-Dawly (SD) rats were treated with arsenic trioxide via drinking water for 6 months, simulating real developmental exposure situation of children. Arsenic exposure impaired the cognitive abilities, and altered the expression of neuronal activity-regulated genes. Total arsenic concentrations of cortex and hippocampus tissues were significantly increased in a dose-dependent manner...
December 7, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29222517/input-dependent-regulation-of-excitability-controls-dendritic-maturation-in-somatosensory-thalamocortical-neurons
#10
Laura Frangeul, Vassilis Kehayas, Jose V Sanchez-Mut, Sabine Fièvre, K Krishna-K, Gabrielle Pouchelon, Ludovic Telley, Camilla Bellone, Anthony Holtmaat, Johannes Gräff, Jeffrey D Macklis, Denis Jabaudon
Input from the sensory organs is required to pattern neurons into topographical maps during development. Dendritic complexity critically determines this patterning process; yet, how signals from the periphery act to control dendritic maturation is unclear. Here, using genetic and surgical manipulations of sensory input in mouse somatosensory thalamocortical neurons, we show that membrane excitability is a critical component of dendritic development. Using a combination of genetic approaches, we find that ablation of N-methyl-D-aspartate (NMDA) receptors during postnatal development leads to epigenetic repression of Kv1...
December 8, 2017: Nature Communications
https://www.readbyqxmd.com/read/29219199/variable-transcriptional-responsiveness-of-the-p2%C3%A2-%C3%A3-%C3%A2-3-receptor-gene-during-cfa-induced-inflammatory-hyperalgesia
#11
Paulina Nuñez-Badinez, Hugo Sepúlveda, Emilio Diaz, Wolfgang Greffrath, Rolf-Detlef Treede, Jimmy Stehberg, Martin Montecino, Brigitte van Zundert
The purinergic receptor P2 × 3 (P2 × 3-R) plays important roles in molecular pathways of pain, and reduction of its activity or expression effectively reduces chronic inflammatory and neuropathic pain sensation. Inflammation, nerve injury, and cancer-induced pain can increase P2 × 3-R mRNA and/or protein levels in dorsal root ganglia (DRG). However, P2 × 3-R expression is unaltered or even reduced in other pain studies. The reasons for these discrepancies are unknown and might depend on the applied traumatic intervention or on intrinsic factors such as age, gender, genetic background and/or epigenetics...
December 8, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/29218547/expression-of-class-i%C3%A2-histone-deacetylases-in-ipsilateral-and-contralateral-hemispheres-after-the-focal-photothrombotic-infarction-in-the-mouse-brain
#12
Svetlana Demyanenko, Maria Neginskaya, Elena Berezhnaya
Histone acetylation and deacetylation are among the most important epigenetic processes that regulate gene expression. Nonselective inhibitors of histone deacetylases (HDAC) can protect brain cells during ischemia and stroke. However, which HDAC isoform is involved in this effect is unknown. Some isoforms of histone deacetylases (HDACs) protect brain cells after ischemia, whereas others can promote their death. Most studies consider early periods (1-24 h) after stroke, whereas little is known on the involvement of HDACs during recovery after stroke...
December 7, 2017: Translational Stroke Research
https://www.readbyqxmd.com/read/29217682/overexpression-of-the-histone-dimethyltransferase-g9a-in-nucleus-accumbens-shell-increases-cocaine-self-administration-stress-induced-reinstatement-and-anxiety
#13
Ethan M Anderson, Erin B Larson, Daniel Guzman, Anne Marie Wissman, Rachael L Neve, Eric J Nestler, David W Self
Repeated exposure to cocaine induces lasting epigenetic changes in neurons that promote the development and persistence of addiction. One epigenetic alteration involves reductions in levels of the histone dimethyltransferase, G9a, in nucleus accumbens (NAc) after chronic cocaine administration. This reduction in G9a may enhance cocaine reward since overexpressing G9a in the NAc decreases cocaine-conditioned place preference. Thus, we hypothesized that HSV-mediated G9a overexpression in the NAc shell (NAcSh) would attenuate cocaine self-administration and cocaine-seeking behavior...
December 7, 2017: Journal of Neuroscience: the Official Journal of the Society for Neuroscience
https://www.readbyqxmd.com/read/29213232/stress-induced-chronic-visceral-pain-of-gastrointestinal-origin
#14
REVIEW
Beverley Greenwood-Van Meerveld, Anthony C Johnson
Visceral pain is generally poorly localized and characterized by hypersensitivity to a stimulus such as organ distension. In concert with chronic visceral pain, there is a high comorbidity with stress-related psychiatric disorders including anxiety and depression. The mechanisms linking visceral pain with these overlapping comorbidities remain to be elucidated. Evidence suggests that long term stress facilitates pain perception and sensitizes pain pathways, leading to a feed-forward cycle promoting chronic visceral pain disorders such as irritable bowel syndrome (IBS)...
2017: Frontiers in Systems Neuroscience
https://www.readbyqxmd.com/read/29213114/the-swi-snf-subunit-bcl7a-contributes-to-motor-coordination-and-purkinje-cell-function
#15
Lena Wischhof, Simona Maida, Antonia Piazzesi, Anna Gioran, Kristina Barragan Sanz, Stephan Irsen, Marc Beyer, Joachim L Schultze, Martin J Dyer, Paolo Salomoni, Dan Ehninger, Pierluigi Nicotera, Daniele Bano
Chromatin remodelers have emerged as prominent regulators of epigenetic processes and potential drivers of various human pathologies. The multi-subunit chromatin-remodeling SWI/SNF complex determines gene expression programs and, consequently, contributes to the differentiation, maturation and plasticity of neurons. Here, we investigate the elusive biological function of Bcl7a and Bcl7b, two newly identified subunits of the SWI/SNF complex that are highly expressed throughout the brain. We generated ubiquitous and neuron-specific Bcl7a and Bcl7b single and double knockout mice...
December 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29204349/annotation-of-nerve-cord-transcriptome-in-earthworm-eisenia-fetida
#16
Vasanthakumar Ponesakki, Sayan Paul, Dinesh Kumar Sudalai Mani, Veeraragavan Rajendiran, Paulkumar Kanniah, Sudhakar Sivasubramaniam
In annelid worms, the nerve cord serves as a crucial organ to control the sensory and behavioral physiology. The inadequate genome resource of earthworms has prioritized the comprehensive analysis of their transcriptome dataset to monitor the genes express in the nerve cord and predict their role in the neurotransmission and sensory perception of the species. The present study focuses on identifying the potential transcripts and predicting their functional features by annotating the transcriptome dataset of nerve cord tissues prepared by Gong et al...
December 2017: Genomics Data
https://www.readbyqxmd.com/read/29202477/crispr-cas9-screen-reveals-a-mycn-amplified-neuroblastoma-dependency-on-ezh2
#17
Liying Chen, Gabriela Alexe, Neekesh V Dharia, Linda Ross, Amanda Balboni Iniguez, Amy Saur Conway, Emily Jue Wang, Veronica Veschi, Norris Lam, Jun Qi, W Clay Gustafson, Nicole Nasholm, Francisca Vazquez, Barbara A Weir, Glenn S Cowley, Levi D Ali, Sasha Pantel, Guozhi Jiang, William F Harrington, Yenarae Lee, Amy Goodale, Rakela Lubonja, John M Krill-Burger, Robin M Meyers, Aviad Tsherniak, David E Root, James E Bradner, Todd R Golub, Charles Wm Roberts, William C Hahn, William A Weiss, Carol J Thiele, Kimberly Stegmaier
Pharmacologically difficult targets, such as MYC transcription factors, represent a major challenge in cancer therapy. For the childhood cancer neuroblastoma, amplification of the oncogene MYCN is associated with high-risk disease and poor prognosis. Here, we deployed genome-scale CRISPR-Cas9 screening of MYCN-amplified neuroblastoma and found a preferential dependency on genes encoding the polycomb repressive complex 2 (PRC2) components EZH2, EED, and SUZ12. Genetic and pharmacological suppression of EZH2 inhibited neuroblastoma growth in vitro and in vivo...
December 4, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/29174947/rbfox1-encoding-a-splicing-regulator-is-a-candidate-gene-for-aggressive-behavior
#18
Noèlia Fernàndez-Castillo, Gabriela Gan, Marjolein M J van Donkelaar, Mariliis Vaht, Heike Weber, Wolfgang Retz, Andreas Meyer-Lindenberg, Barbara Franke, Jaanus Harro, Andreas Reif, Stephen V Faraone, Bru Cormand
The RBFOX1 gene (or A2BP1) encodes a splicing factor important for neuronal development that has been related to autism spectrum disorder and other neurodevelopmental phenotypes. Evidence from complementary sources suggests that this gene contributes to aggressive behavior. Suggestive associations with RBFOX1 have been identified in genome-wide association studies (GWAS) of anger, conduct disorder, and aggressive behavior. Nominal association signals in RBFOX1 were also found in an epigenome-wide association study (EWAS) of aggressive behavior...
November 23, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29174530/increased-cortical-neuronal-responses-to-nmda-and-improved-attentional-set-shifting-performance-in-rats-following-prebiotic-b-gos%C3%A2-ingestion
#19
Benjamin Gronier, Helene M Savignac, Mathieu Di Miceli, Sherif M Idriss, George Tzortzis, Daniel Anthony, Philip W J Burnet
We have previously shown that prebiotics (dietary fibres that augment the growth of indigenous beneficial gut bacteria) such as Bimuno™ galacto-oligosaccharides (B-GOS®), increased N-methyl-D-aspartate (NMDA) receptor levels in the rat brain. The current investigation examined the functional correlates of these changes in B-GOS®-fed rats by measuring cortical neuronal responses to NMDA using in vivo NMDA micro-iontophoresis electrophysiology, and performance in the attentional set-shifting task. Adult male rats were supplemented with B-GOS® in the drinking water 3 weeks prior to in vivo iontophoresis or behavioural testing...
November 21, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
https://www.readbyqxmd.com/read/29172706/methylation-changes-and-pathways-affected-in-preterm-birth-a-role-for-slc6a3-in-neurodevelopment
#20
Ana Arpón, Fermín I Milagro, Ana Laja, Víctor Segura, Miguel Sáenz de Pipaón, José-Ignacio Riezu-Boj, J Alfredo Martínez
AIM: To analyze whether preterm newborns show differences in methylation patterns in comparison to full-term newborns in white blood cells. PATIENTS & METHODS: Anthropometrical, biochemical features and methylation levels of preterm newborns (n = 24) and full-term newborns (n = 22) recruited in La Paz University Hospital (Spain) were assessed at 12 months of gestational age, whereas Bayley Scale of Infant Development was evaluated at 24/36 months. RESULTS: From all the statistically significant CpGs, methylation levels of cg00997378 (SLC6A3 gene) showed the highest differences (p < 0...
November 27, 2017: Epigenomics
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