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H3K4me2

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https://www.readbyqxmd.com/read/29779894/epigenetic-regulation-by-baf-complexes-limits-neural-stem-cell-proliferation-by-suppressing-wnt-signaling-in-late-embryonic-development
#1
Huong Nguyen, Cemil Kerimoglu, Mehdi Pirouz, Linh Pham, Kamila A Kiszka, Godwin Sokpor, M Sadman Sakib, Joachim Rosenbusch, Ulrike Teichmann, Rho H Seong, Anastassia Stoykova, Andre Fischer, Jochen F Staiger, Tran Tuoc
During early cortical development, neural stem cells (NSCs) divide symmetrically to expand the progenitor pool, whereas, in later stages, NSCs divide asymmetrically to self-renew and produce other cell types. The timely switch from such proliferative to differentiative division critically determines progenitor and neuron numbers. However, the mechanisms that limit proliferative division in late cortical development are not fully understood. Here, we show that the BAF (mSWI/SNF) complexes restrict proliferative competence and promote neuronal differentiation in late corticogenesis...
May 8, 2018: Stem Cell Reports
https://www.readbyqxmd.com/read/29748386/frequent-irf1-binding-at-remote-elements-without-histone-modification
#2
Mohamed Abou El Hassan, Katherine Huang, Zhaodong Xu, Tao Yu, Rod Bremner
Transcriptional activators bind DNA and recruit cofactors to modify chromatin.  The extent to which these two events are separable is unclear.  Here, using a custom ChIP tiling array to map chromatin modifications, we show that Interferon-γ-induced DNA-binding of signal transducer and activator of transcription 1 (STAT1), typically associated with the transcription factor IFN regulatory factor 1 (IRF1), causes histone acetylation (H3ac, H4ac). In contrast, among IRF1 sites lacking concomitant STAT1 recruitment, only 25% underwent inducible histone acetylation, 31% exhibited constitutive histone acetylation, and 44% had no histone acetylation...
May 10, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29743358/the-chromatin-remodeling-factor-spoc1-acts-as-a-cellular-restriction-factor-against-human-cytomegalovirus-by-repressing-the-major-immediate-early-promoter
#3
Anna Reichel, Anne-Charlotte Stilp, Myriam Scherer, Nina Reuter, Sören Lukassen, Bahram Kasmapour, Sabrina Schreiner, Luka Cicin-Sain, Andreas Winterpacht, Thomas Stamminger
The cellular protein SPOC1 (survival time-associated PHD finger protein in ovarian cancer 1) acts as a regulator of chromatin structure and DNA damage response. It binds H3K4me2/3 containing chromatin and promotes DNA condensation by recruiting corepressors such as KAP-1 and H3K9 methyltransferases. Previous studies identified SPOC1 as a restriction factor against human adenovirus (HAdV) infection that is antagonized by E1B-55K/E4orf6-dependent proteasomal degradation. Here, we demonstrate that, in contrast to HAdV-infected cells, SPOC1 is transiently upregulated during the early phase of HCMV replication...
May 9, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29737623/association-between-h3k4-methylation-and-cancer-prognosis-a-meta-analysis
#4
Simin Li, Luyan Shen, Ke-Neng Chen
BACKGROUND: Histone H3 lysine 4 methylation (H3K4 methylation), including mono-methylation (H3K4me1), di-methylation (H3K4me2), or tri-methylation (H3K4me3), is one of the epigenetic modifications to histone proteins, which are related to the transcriptional activation of genes. H3K4 methylation has both tumor inhibiting and promoting effects, and the prognostic value of H3K4 methylation in cancer remains controversial. Therefore, we performed a systematic review and meta-analysis to examine the association between H3K4 methylation and cancer prognosis...
May 8, 2018: Thoracic Cancer
https://www.readbyqxmd.com/read/29686098/polycomb-protein-scml2-facilitates-h3k27me3-to-establish-bivalent-domains-in-the-male-germline
#5
So Maezawa, Kazuteru Hasegawa, Masashi Yukawa, Naoki Kubo, Akihiko Sakashita, Kris G Alavattam, Ho-Su Sin, Andrey V Kartashov, Hiroyuki Sasaki, Artem Barski, Satoshi H Namekawa
Repressive H3K27me3 and active H3K4me2/3 together form bivalent chromatin domains, molecular hallmarks of developmental potential. In the male germline, these domains are thought to persist into sperm to establish totipotency in the next generation. However, it remains unknown how H3K27me3 is established on specific targets in the male germline. Here, we demonstrate that a germline-specific Polycomb protein, SCML2, binds to H3K4me2/3-rich hypomethylated promoters in undifferentiated spermatogonia to facilitate H3K27me3...
April 23, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29670509/altered-gene-regulatory-function-of-kdm5c-by-a-novel-mutation-associated-with-autism-and-intellectual-disability
#6
Christina N Vallianatos, Clara Farrehi, Michael J Friez, Margit Burmeister, Catherine E Keegan, Shigeki Iwase
Intellectual disability (ID) affects up to 2% of the population world-wide and often coincides with other neurological conditions such as autism spectrum disorders. Mutations in KDM5C cause Mental Retardation, X-linked, Syndromic, Claes-Jensen type (MRXSCJ, OMIM #300534) and are one of the most common causes of X-linked ID. KDM5C encodes a histone demethylase for di- and tri-methylated histone H3 lysine 4 (H3K4me2/3), which are enriched in transcriptionally engaged promoter regions. KDM5C regulates gene transcription; however, it remains unknown whether removal of H3K4me is fully responsible for KDM5C-mediated gene regulation...
2018: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29588287/fanconi-anemia-fancm-fncm-1-and-fancd2-fcd-2-are-required-for-maintaining-histone-methylation-levels-and-interact-with-the-histone-demethylase-lsd1-spr-5-in-caenorhabditis-elegans
#7
Hyun-Min Kim, Sara E Beese-Sims, Monica P Colaiácovo
The histone demethylase LSD1 was originally discovered as removing methyl groups from di- and monomethylated histone H3 lysine 4 (H3K4me2/1). Several studies suggest LSD1 plays roles in meiosis as well as in the epigenetic regulation of fertility given that in its absence there is evidence of a progressive accumulation of H3K4me2 and increased sterility through generations. In addition to the progressive sterility phenotype observed in the mutants, growing evidence for the importance of histone methylation in the regulation of DNA damage repair has attracted more attention to the field in recent years...
March 27, 2018: Genetics
https://www.readbyqxmd.com/read/29573696/low-omega-6-omega-3-ratio-in-a-maternal-protein-deficient-diet-promotes-histone-3-changes-in-progeny-neural-cells-and-favors-leukemia-inhibitory-factor-gene-transcription
#8
Alinny Rosendo Isaac, Emerson Alexandre Neves da Silva, Rhowena Jane Barbosa de Matos, Ricielle Lopes Augusto, Giselle Machado Magalhães Moreno, Ingrid Prata Mendonça, Raphael Fabrício de Souza, Paulo Euzébio Cabral-Filho, Cláudio Gabriel Rodrigues, Catarina Gonçalves-Pimentel, Fabíola Lacerda, Maria Luisa Martins Alessio, Marcelo Cairrão Araujo Rodrigues, Belmira Lara da Silveira Andrade-da-Costa
Omega-3 (n-3) fatty acids modulate epigenetic changes critical to genesis and differentiation of neural cells. Conversely, maternal protein-malnutrition can negatively modify these changes. This study investigated whether a low n-6/n-3 ratio in a maternal diet could favor histone-3 (H3) modifications, gene transcription and differentiation in the offspring neural cells even under protein-deficiency. Female rats fed a control (Ct), or 3 types of multideficient diets differing in protein levels or linoleic/alpha-linolenic fatty acid ratios (RBD, RBD-C, RBD-SO) from 30 days prior to mating and during pregnancy...
February 13, 2018: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29570119/h3k4-methylation-regulates-lps-induced-proinflammatory-cytokine-expression-and-release-in-macrophages
#9
Shuqi Zhao, Yuyun Zhong, Xiaoxia Fu, Yiqian Wang, Ping Ye, Junwei Cai, Yun Liu, Jiang Sun, Zhuzhong Mei, Yong Jiang, Jinghua Liu
Histone methylation is an important epigenetic mechanism that plays an essential role in regulating gene expression in mammalian cells. To understand its influence on inflammation, methylation of H3K4, H3K9, H3K36, H3K79, and H4K20, the most common histones methylated in the inflammatory response, was analyzed in murine RAW264.7 cells and bone marrow-derived macrophages (BMDMs) upon LPS stimulation. LPS stimulation resulted in enhanced methylation at H3K4 and H3K9 in both RAW264.7 and BMDMs. To further confirm whether LPS-stimulated H3K4me2 and H3K9me2 were responsible for subsequent proinflammatory cytokine expression, the recruitment of H3K4me2 and H3K9me2 at the promoters of IL-6 and TNF-α was assessed...
March 21, 2018: Shock
https://www.readbyqxmd.com/read/29565495/down-regulation-of-jarid1b-expression-inhibits-cell-proliferation-induces-apoptosis-and-blocks-cell-cycle-in-human-acute-lymphoblastic-leukemia-cells
#10
Y-Q Huang, Y Zou, R-J Zheng, X-D Ma
OBJECTIVE: Acute lymphocytic leukemia (ALL) is a multi-factorial blood disease with unknown pathogenesis. Histone H3K4 methylation was significantly reduced in ALL patients, whereas jumonji AT-rich interactive domain 1B (JARID1B) was the specific demethylase of H3K4me. This study explores the expression level of JARID1B in ALL patients and down-regulated JARID1B expression in ALL cells to explore the function of JARID1B in ALL. PATIENTS AND METHODS: JARID1B mRNA expression level in ALL patients was detected by Real-time PCR...
March 2018: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29542357/treating-donor-cells-with-2-pcpa-corrects-aberrant-histone-h3k4-dimethylation-and-improves-cloned-goat-embryo-development
#11
Tingchao Mao, Chengquan Han, Ruizhi Deng, Biao Wei, Peng Meng, Yan Luo, Yong Zhang
Epigenetic modifications extensively occur in mammalian embryonic development and cell differentiation process. They play an essential role in the reprogramming of nuclei during somatic cell nuclear transfer (SCNT) and subsequent in vitro embryonic development. Recently, SCNT embryos have been verified to contain a subnormal level of histone H3K4 dimethylation (H3K4me2) in contrast to in vitro fertilized embryos. This finding suggested that increasing H3K4me2 levels may ameliorate the aberrant development of cloned embryos...
June 2018: Systems Biology in Reproductive Medicine
https://www.readbyqxmd.com/read/29506216/localization-of-dimethylated-histone-three-lysine-four-in-the-rattus-norvegicus-sperm-genome
#12
Shelby Wilson, Edward Dere, David Klein, Christoph Schorl, Susan Hall, Kim Boekelheide
We examined the precise localization of dimethylated histone three lysine four (H3K4me2) in mature rat sperm. Within non-intergenic enriched regions, half of the DNA peaks associated with H3K4me2 retention fell in gene bodies and the other half in promoter regions. The most significant peaks near annotated DNA regions in the composite data included loci known to be associated with RNA metabolism, cell cycle regulation and spermatogenesis. Regions associated with differential retention of H3K4me2 within gene bodies were significantly enriched for housekeeping gene and cell-cycle functionality...
February 28, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29502954/ory-1001-a-potent-and-selective-covalent-kdm1a-inhibitor-for-the-treatment-of-acute-leukemia
#13
Tamara Maes, Cristina Mascaró, Iñigo Tirapu, Angels Estiarte, Filippo Ciceri, Serena Lunardi, Nathalie Guibourt, Alvaro Perdones, Michele M P Lufino, Tim C P Somervaille, Dan H Wiseman, Cihangir Duy, Ari Melnick, Christophe Willekens, Alberto Ortega, Marc Martinell, Nuria Valls, Guido Kurz, Matthew Fyfe, Julio Cesar Castro-Palomino, Carlos Buesa
The lysine-specific demethylase KDM1A is a key regulator of stem cell potential in acute myeloid leukemia (AML). ORY-1001 is a highly potent and selective KDM1A inhibitor that induces H3K4me2 accumulation on KDM1A target genes, blast differentiation, and reduction of leukemic stem cell capacity in AML. ORY-1001 exhibits potent synergy with standard-of-care drugs and selective epigenetic inhibitors, reduces growth of an AML xenograft model, and extends survival in a mouse PDX (patient-derived xenograft) model of T cell acute leukemia...
March 12, 2018: Cancer Cell
https://www.readbyqxmd.com/read/29486229/epigenome-analysis-links-gene-regulatory-elements-in-group-2-innate-lymphocytes-to-asthma-susceptibility
#14
Ralph Stadhouders, Bobby W S Li, Marjolein J W de Bruijn, Antonio Gomez, Tata Nageswara Rao, Hans Jörg Fehling, Wilfred F J van IJcken, Ai Ing Lim, James P Di Santo, Thomas Graf, Rudi W Hendriks
BACKGROUND: Group 2 innate lymphoid cells (ILC2s) are major producers of the cytokines driving allergic asthma, and increased ILC2 numbers have been detected in blood and sputum of asthmatic patients. Asthma susceptibility has a strong genetic component, but the underlying mechanisms and whether asthma genetics affect ILC2 biology remain unclear. OBJECTIVE: We sought to study the ILC2 transcriptome and epigenome during airway inflammation (AI) to couple these to genes and genetic variants associated with asthma pathogenesis...
March 2, 2018: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/29480027/transcriptomic-and-epigenetic-analysis-of-breast-cancer-stem-cells
#15
Guochao Li, Dong Wang, Wencui Ma, Ke An, Zongzhi Liu, Xinyu Wang, Caiyun Yang, Fengxia Du, Xiao Han, Shuang Chang, Hui Yu, Zilong Zhang, Zitong Zhao, Yan Zhang, Junyun Wang, Yingli Sun
AIM: Cancer stem cells (CSCs) drive triple-negative breast cancer recurrence via their properties of self-renewal, invasiveness and radio/chemotherapy resistance. This study examined how CSCs might sustain these properties. MATERIALS & METHODS: Transcriptomes, DNA methylomes and histone modifications were compared between CSCs and non-CSCs. RESULTS: Transcriptome analysis revealed several pathways that were activated in CSCs, whereas cell cycle regulation pathways were inhibited...
February 26, 2018: Epigenomics
https://www.readbyqxmd.com/read/29459279/cyclic-peptide-inhibitors-of-lysine-specific-demethylase-1-with-improved-potency-identified-by-alanine-scanning-mutagenesis
#16
Isuru R Kumarasinghe, Patrick M Woster
Lysine-specific demethylase 1 (LSD1) is a chromatin-remodeling enzyme that plays an important role in cancer. Over-expression of LSD1 decreases methylation at histone 3 lysine 4, and aberrantly silences tumor suppressor genes. Inhibitors of LSD1 have been designed as chemical probes and potential antitumor agents. We recently reported the cyclic peptide 9, which potently and reversibly inhibits LSD1 (IC50 2.1 μM; Ki 385 nM). Systematic alanine mutagenesis of 9 revealed residues that are critical for LSD1 inhibition, and these mutated peptides were evaluated as LSD1 inhibitors...
March 25, 2018: European Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29425832/small-activating-rna-induced-expression-of-vhl-gene-in-renal-cell-carcinoma
#17
Moo Rim Kang, Ki Hwan Park, Chang Woo Lee, Myeong Youl Lee, Sang-Bae Han, Long-Cheng Li, Jong Soon Kang
Recent studies have reported that chemically synthesized double-stranded RNAs (dsRNAs), also known as small activating RNA (saRNAs), can specifically induce gene expression by targeting promoter sequences by a mechanism termed RNA activation (RNAa). In the present study, we designed 4 candidate saRNAs targeting the Von Hippel-Lindau (VHL) gene promoter. Among these saRNAs, dsVHL-821 significantly inhibited cell growth by up-regulating VHL at both the mRNA and protein levels in renal cell carcinoma 769-P cells...
April 2018: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/29423916/epiproteome-profiling-of-cadmium-transformed-human-bronchial-epithelial-cells-by-quantitative-histone-post-translational-modification-enzyme-linked-immunosorbent-assay
#18
Zhan-Ling Liang, Dan-Dan Wu, Yue Yao, Fei-Yuan Yu, Lei Yang, Heng Wee Tan, Machteld N Hylkema, Marianne G Rots, Yan-Ming Xu, Andy T Y Lau
Cadmium (Cd), a carcinogenic toxic metal, is pervasively distributed in the soil, water and air. Chronic exposure to Cd has been correlated to lung disease development including cancers. Although many studies have been conducted to investigate the proteome response of cells challenged with Cd, the epiproteomic responses (i.e., global histone post-translational modifications [PTMs]), particularly in human lung cells, are largely unexplored. Here, we provide an epiproteome profiling of human bronchial epithelial cells (BEAS-2B) chronically treated with cadmium chloride (CdCl2 ), with the aim of identifying global epiproteomic signatures in response to Cd epigenotoxicity...
June 2018: Journal of Applied Toxicology: JAT
https://www.readbyqxmd.com/read/29373650/melatonin-protects-oocytes-from-mehp-exposure-induced-meiosis-defects-in-porcine
#19
Yu Zhang, Teng Wang, Mei Lan, Xin-Wei Zang, Yi-Lun Li, Xiang-Shun Cui, Nam-Hyung Kim, Shao-Chen Sun
In 2011, DEHP (plasticizer) was reported to illegally be added in food and beverage products in Taiwan, which caused great concerns about food safety worldwide. DHEP has multiple toxic effects to human and animals such as endocrine disruption, cardiotoxicity, reproductive function, and development defects. However, the toxic effects of DEHP on mammalian oocyte quality are still unclear. Since MEHP is the active metabolite of DEHP in vivo, in this study we used porcine oocyte as model to explore the effects of MEHP on oocyte maturation and we also studied the effects of melatonin administration on MEHP exposure-induced meiosis defects...
March 1, 2018: Biology of Reproduction
https://www.readbyqxmd.com/read/29364237/chromatin-immunoprecipitation-chip-of-histone-modifications-from-saccharomyces-cerevisiae
#20
Meagan Jezek, Alison Jacques, Deepika Jaiswal, Erin M Green
Histone post-translational modifications (PTMs), such as acetylation, methylation and phosphorylation, are dynamically regulated by a series of enzymes that add or remove these marks in response to signals received by the cell. These PTMS are key contributors to the regulation of processes such as gene expression control and DNA repair. Chromatin immunoprecipitation (chIP) has been an instrumental approach for dissecting the abundance and localization of many histone PTMs throughout the genome in response to diverse perturbations to the cell...
December 29, 2017: Journal of Visualized Experiments: JoVE
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