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histone H3.2

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https://www.readbyqxmd.com/read/29775417/targeting-histone-methyltransferase-enhancer-of-zeste-homolog-2-inhibits-renal-epithelial-mesenchymal-transition-and-attenuates-renal-fibrosis
#1
Xiaoxu Zhou, Chongxiang Xiong, Evelyn Tolbert, Ting C Zhao, George Bayliss, Shougang Zhuang
Enhancer of zeste homolog-2 (EZH2) is a methyltransferase that induces histone H3 lysine 27 trimethylation (H3K27me3) and functions as an oncogenic factor in many cancer types. Its role in renal epithelial-mesenchymal transition (EMT) remains unknown. In this study, we found that EZH2 and H3K27me3 were highly expressed in mouse kidney with unilateral ureteral obstruction and cultured mouse kidney proximal tubular (TKPT) cells undergoing EMT. Inhibition of EZH2 with 3-deazaneplanocin A (3-DZNeP) attenuated renal fibrosis, which was associated with preserving E-cadherin expression and inhibiting Vimentin up-regulation in the obstructed kidney...
May 18, 2018: FASEB Journal: Official Publication of the Federation of American Societies for Experimental Biology
https://www.readbyqxmd.com/read/29774413/alterations-in-histone-acetylation-following-exposure-to-60-co-%C3%AE-rays-and-their-relationship-with-chromosome-damage-in-human-lymphoblastoid-cells
#2
Xue-Lei Tian, Xue Lu, Jiang-Bin Feng, Tian-Jing Cai, Shuang Li, Mei Tian, Qing-Jie Liu
Chromosome damage is related to DNA damage and erroneous repair. It can cause cell dysfunction and ultimately induce carcinogenesis. Histone acetylation is crucial for regulating chromatin structure and DNA damage repair. Ionizing radiation (IR) can alter histone acetylation. However, variations in histone acetylation in response to IR exposure and the relationship between histone acetylation and IR-induced chromosome damage remains unclear. Hence, this study investigated the variation in the total acetylation levels of H3 and H4 in human lymphocytes exposed to 0-2 Gy 60 Co γ-rays...
May 17, 2018: Radiation and Environmental Biophysics
https://www.readbyqxmd.com/read/29763912/-a-succinate-ether-derivative-of-tocotrienol-enhances-dickkopf-1-gene-expression-through-epigenetic-alterations-in-malignant-mesothelioma-cells
#3
Ayami Sato, Haruka Ueno, Momoka Fusegi, Saki Kaneko, Kakeru Kohno, Nantiga Virgona, Akira Ando, Yuko Sekine, Tomohiro Yano
BACKGROUND: Wnt signaling plays an essential role in tumor cell growth, including the development of malignant mesothelioma (MM). Epigenetic silencing of negative Wnt regulators leading to constitutive Wnt signaling has been observed in various cancers and warrants further attention. We have reported that a succinate ether derivative of α-tocotrienol (T3E) has potent cytotoxic effects in MM cells. Thus, in this study, we investigated whether the anti-MM effect of T3E could be mediated via the epigenetic alteration of the Wnt antagonist gene, Dickkopf-1 (DKK1)...
May 15, 2018: Pharmacology
https://www.readbyqxmd.com/read/29762370/molecular-regulations-of-mucosal-maltase-expressions
#4
Toshinao Goda, Kazue Honma
Two major α-glucosidase (maltase) genes, sucrase-isomaltase (SI) and maltase-glucoamylase (MGAM), respectively, are expressed in the small intestine. In this review, we have summarized whether jejunal expression of these maltase genes is regulated by dietary manipulations, which may affect carbohydrate availability from the luminal side, through changes in the binding of transcription factors and/or histone code on these genes. Studies using a model of mice fed either a low-starch or a high-starch diet for 7 days, found the mRNA levels of SI, MGAM, and Na-glucose cotransporter (SGLT1) genes in the jejunum to be increased in parallel by feeding a high-starch diet...
June 2018: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/29759420/lysyl-oxidase-like-2-contributes-to-renal-fibrosis-in-col4%C3%AE-3-alport-mice
#5
Dominic Cosgrove, Brianna Dufek, Daniel T Meehan, Duane Delimont, Michael Hartnett, Gina Samuelson, Michael Anne Gratton, Grady Phillips, Deidre A MacKenna, Gretchen Bain
Lysyl oxidase like-2 (LOXL2) is an amine oxidase with both intracellular and extracellular functions. Extracellularly, LOXL2 promotes collagen and elastin crosslinking, whereas intracellularly, LOXL2 has been reported to modify histone H3, stabilize SNAIL, and reduce cell polarity. Although LOXL2 promotes liver and lung fibrosis, little is known regarding its role in renal fibrosis. Here we determine whether LOXL2 influences kidney disease in COL4A3 (-/-) Alport mice. These mice were treated with a small molecule inhibitor selective for LOXL2 or with vehicle and assessed for glomerular sclerosis and fibrosis, albuminuria, blood urea nitrogen, lifespan, pro-fibrotic gene expression and ultrastructure of the glomerular basement membrane...
May 11, 2018: Kidney International
https://www.readbyqxmd.com/read/29757500/immunohistochemistry-for-histone-h3g34w-and-h3k36m-is-highly-specific-for-giant-cell-tumor-of-bone-and-chondroblastoma-respectively-in-fna-and-core-needle-biopsy
#6
Inga-Marie Schaefer, Jonathan A Fletcher, G Petur Nielsen, Angela R Shih, Marco L Ferrone, Jason L Hornick, Xiaohua Qian
BACKGROUND: Diagnosing giant cell-rich bone tumors can be challenging on limited biopsies. H3 histone family member 3A (H3F3A) (G34W/V/R/L) mutations are present in the majority of giant cell tumors (GCTs) of bone and H3 histone family member 3B (H3F3B) (K36M) mutations are present in nearly all chondroblastomas, but are absent in histologic mimics. Mutation-specific immunohistochemistry (IHC) is highly specific for GCT and chondroblastoma in surgical excisions. The objective of the current study was to validate H3G34W and H3K36M IHC in the diagnosis of giant cell-rich bone tumors on fine-needle aspiration and core needle biopsy specimens...
May 14, 2018: Cancer Cytopathology
https://www.readbyqxmd.com/read/29751847/asf1-is-required-to-load-histones-on-the-hira-complex-in-preparation-of-paternal-chromatin-assembly-at-fertilization
#7
Béatrice Horard, Laure Sapey-Triomphe, Emilie Bonnefoy, Benjamin Loppin
BACKGROUND: Anti-Silencing Factor 1 (ASF1) is a conserved H3-H4 histone chaperone involved in both Replication-Coupled and Replication-Independent (RI) nucleosome assembly pathways. At DNA replication forks, ASF1 plays an important role in regulating the supply of H3.1/2 and H4 to the CAF-1 chromatin assembly complex. ASF1 also provides H3.3-H4 dimers to HIRA and DAXX chaperones for RI nucleosome assembly. The early Drosophila embryo is an attractive system to study chromatin assembly in a developmental context...
May 11, 2018: Epigenetics & Chromatin
https://www.readbyqxmd.com/read/29743404/-epigenetic-aberrations-in-adult-t-cell-leukemia-lymphoma-and-development-of-a-novel-ezh1-2-inhibitor
#8
Makoto Yamagishi
Histone H3 lysine 27 tri-methylation (H3K27me3) -dependent transcription regulation is a fundamental process of gene control. Although EZH2 mutation is observed in certain lymphoma types, many other cancers show global H3K27me3 accumulation irrespective of mutation. However, the underlying mechanisms of gene silencing and therapeutic efficacies of epigenetic drugs remain unclear. In this study, we showed that globally-accumulated H3K27me3 is induced by both cis-bound EZH1 and EZH2 in mature lymphocyte-derived malignancies...
2018: [Rinshō Ketsueki] the Japanese Journal of Clinical Hematology
https://www.readbyqxmd.com/read/29737623/association-between-h3k4-methylation-and-cancer-prognosis-a-meta-analysis
#9
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/29734782/design-synthesis-and-in-vitro-evaluation-of-novel-histone-h3-peptide-based-lsd1-inactivators-incorporating-%C3%AE-%C3%AE-disubstituted-amino-acids-with-%C3%AE-turn-inducing-structures
#10
Yosuke Ota, Taeko Kakizawa, Yukihiro Itoh, Takayoshi Suzuki
Lysine-specific demethylase 1 (LSD1) mainly removes methyl groups of mono- or di-methylated lysine residues at the fourth position of histone H3 to epigenetically regulate the expression of genes associated with several diseases, such as cancer. Therefore, LSD1 inactivators are expected to be used as therapeutic agents. In this study, to identify novel peptide-based LSD1 inactivators, we focused on the X-ray structure of LSD1 complexed with a H3 peptide-based suicide substrate. It has been proposed that a methylated histone substrate forms three consecutive γ-turn structures in the active pocket of LSD1...
May 6, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29721855/id1-and-sonic-hedgehog-mediate-cell-cycle-reentry-and-apoptosis-induced-by-amyloid-beta-peptide-in-post-mitotic-cortical-neurons
#11
A-Ching Chao, Chien-Hui Chen, Shih-Hsin Chang, Chao-Tzu Huang, Wei-Chao Hwang, Ding-I Yang
Amyloid beta-peptide (Aβ), the neurotoxic component of senile plaques in Alzheimer's disease (AD) brains, is known to trigger cell cycle reentry in post-mitotic neurons followed by apoptosis. However, the underlying mechanisms remain unclear. Recently, we have reported that Aβs stimulate the expression of inhibitor of differentiation-1 (Id1) to induce sonic hedgehog (SHH) (Hung et al., Mol Neurobiol 53(2):793-809, 2016), and both are mitogens capable of triggering cell cycle progression. In this work, we tested the hypothesis that Aβ-induced Id1 and SHH contribute to cell cycle reentry leading to apoptosis in neurons...
May 2, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29719500/valproic-acid-attenuates-traumatic-brain-injury-induced-inflammation-in-vivo-involvement-of-autophagy-and-the-nrf2-are-signaling-pathway
#12
Xiangrong Chen, Handong Wang, Mengliang Zhou, Xiang Li, Zhongning Fang, Hongzhi Gao, Yasong Li, Weipeng Hu
Microglial activation and the inflammatory response in the central nervous system (CNS) play important roles in secondary damage after traumatic brain injury (TBI). Transcriptional activation of genes that limit secondary damage to the CNS are mediated by a cis-acting element called the antioxidant responsive element (ARE). ARE is known to associate with the transcription factor NF-E2-related factor 2 (Nrf2), a transcription factor that is associated with histone deacetylases (HDACs). This pathway, known as the Nrf2/ARE pathway, is a critical antioxidative factor pathway that regulates the balance of oxygen free radicals and the inflammatory response, and is also related to autophagic activities...
2018: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/29716999/the-histone-methyltransferase-setd2-is-required-for-expression-of-acrosin-binding-protein-1and-protamines-and-essential-for-spermiogenesis-in-mice
#13
Xiaoli Zuo, Bowen Rong, Li Li, Ruitu Lv, Fei Lan, Ming-Han Tong
Spermatogenesis is precisely controlled by complex gene expression programs and involves epigenetic reprogramming including histone modification and DNA methylation. SET domain-containing 2 (Setd2) is the predominant histone methyltransferase catalyzing the trimethylation of histone H3 Lysine 36 (H3K36me3) and plays key roles in embryonic stem cell differentiation and somatic cell development. However, its role in male germ cell development remains elusive. Here we demonstrate an essential role of Setd2for spermiogenesis,the final stage of spermatogenesis...
May 1, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29712868/-insulin-promoter-in-human-pancreatic-%C3%AE-cells-contacts-diabetes-susceptibility-loci-and-regulates-genes-affecting-insulin-metabolism
#14
Xing Jian, Gary Felsenfeld
Both type 1 and type 2 diabetes involve a complex interplay between genetic, epigenetic, and environmental factors. Our laboratory has been interested in the physical interactions, in nuclei of human pancreatic β cells, between the insulin ( INS) gene and other genes that are involved in insulin metabolism. We have identified, using Circularized Chromosome Conformation Capture (4C), many physical contacts in a human pancreatic β cell line between the INS promoter on chromosome 11 and sites on most other chromosomes...
April 30, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29704392/the-nephroprotective-effect-of-ms-275-on-lipopolysaccharide-lps-induced-acute-kidney-injury-by-inhibiting-reactive-oxygen-species-ros-oxidative-stress-and-endoplasmic-reticulum-stress
#15
Haiyue Zhang, Wenbin Zhang, Fangzhou Jiao, Xun Li, Hong Zhang, Luwen Wang, Zuojiong Gong
BACKGROUND Histone deacetylase (HDAC) inhibitors can attenuate acute kidney injury (AKI)-mediated damage and reduce fibrosis in kidney disease models. The aim of the present study was to investigate the effects of the HDAC inhibitor MS-275 on lipopolysaccharide (LPS)-induced AKI and the associated mechanisms. MATERIAL AND METHODS A LPS-induced model in 6-8 weeks-old mice was established by intraperitoneal injection of LPS (10 mg/kg), with pre-treatment of MS-275 (2 mg/kg/day) administered intraperitoneally for five days...
April 28, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29701680/-haliotis-discus-discus-sialic-acid-binding-lectin-reduces-the-oncolytic-vaccinia-virus-induced-toxicity-in-a-glioblastoma-mouse-model
#16
Gongchu Li, Shengsheng Mei, Jianhong Cheng, Tao Wu, Jingjing Luo
Although oncolytic viruses provide attractive vehicles for cancer treatment, their adverse effects are largely ignored. In this work, rat C6 glioblastoma cells were subcutaneously xenografted into mice, and a thymidine kinase-deficient oncolytic vaccinia virus (oncoVV) induced severe toxicity in this model. However, oncoVV-HddSBL, in which a gene encoding Haliotis discus discus sialic acid-binding lectin (HddSBL) was inserted into oncoVV, significantly prolonged the survival of mice as compared to the control virus...
April 26, 2018: Marine Drugs
https://www.readbyqxmd.com/read/29700471/telobox-motifs-recruit-clf-swn-prc2-for-h3k27me3-deposition-via-trb-factors-in-arabidopsis
#17
Yue Zhou, Yuejun Wang, Kristin Krause, Tingting Yang, Joram A Dongus, Yijing Zhang, Franziska Turck
Polycomb repressive complexes (PRCs) control organismic development in higher eukaryotes through epigenetic gene repression1-4 . PRC proteins do not contain DNA-binding domains, thus prompting questions regarding how PRCs find their target loci 5 . Here we present genome-wide evidence of PRC2 recruitment by telomere-repeat-binding factors (TRBs) through telobox-related motifs in Arabidopsis. A triple trb1-2, trb2-1, and trb3-2 (trb1/2/3) mutant with a developmental phenotype and a transcriptome strikingly similar to those of strong PRC2 mutants showed redistribution of trimethyl histone H3 Lys27 (H3K27me3) marks and lower H3K27me3 levels, which were correlated with derepression of TRB1-target genes...
April 26, 2018: Nature Genetics
https://www.readbyqxmd.com/read/29696577/expression-of-the-serotonin-receptor-2b-in-uveal-melanoma-and-effects-of-an-antagonist-on-cell-lines
#18
Cindy Weidmann, Julie Bérubé, Léo Piquet, Arnaud de la Fouchardière, Solange Landreville
Uveal melanoma (UM) is the most common primary tumor in the adult, and disseminates to the liver in half of patients. A 15-gene expression profile prognostic assay allows to determine the likelihood of metastasis in patients using their ocular tumor DNA, but a cure still remains to be discovered. The serotonin receptor 2B represents the discriminant gene of this molecular signature with the greatest impact on the prognosis of UM. However, its contribution to the metastatic potential of UM remains unexplored...
April 25, 2018: Clinical & Experimental Metastasis
https://www.readbyqxmd.com/read/29695021/pre-clinical-model-to-study-recurrent-venous-thrombosis-in-the-inferior-vena-cava
#19
Elizabeth A Andraska, Catherine E Luke, Megan A Elfline, Samuel P Henke, Siddharth S Madapoosi, Allan K Metz, Megan E Hoinville, Thomas W Wakefield, Peter K Henke, Jose A Diaz
BACKGROUND:  Patients undergoing deep vein thrombosis (VT) have over 30% recurrence, directly increasing their risk of post-thrombotic syndrome. Current murine models of inferior vena cava (IVC) VT model host one thrombosis event. OBJECTIVE:  We aimed to develop a murine model to study IVC recurrent VT in mice. MATERIALS AND METHODS:  An initial VT was induced using the electrolytic IVC model (EIM) with constant blood flow. This approach takes advantage of the restored vein lumen 21 days after a single VT event in the EIM demonstrated by ultrasound...
April 25, 2018: Thrombosis and Haemostasis
https://www.readbyqxmd.com/read/29689924/a-new-species-of-enchytraeus-enchytraeidae-oligochaeta-from-the-profundal-of-lake-van-the-world-s-largest-soda-lake-turkey-east-anatolia
#20
Naİme Arslan, Tarmo Timm, VerÓnica Rojo, AntÓn VizcaÍno, RÜdiger M Schmelz
Enchytraeus polatdemiri sp. nov. (Enchytaeidae, Oligochaeta) was discovered in the framework of a sampling campaign of the benthic invertebrate fauna of the hyperalkaline Lake Van in Eastern Anatolia, Turkey, the third-largest closed lake and the largest soda lake on Earth. It was the only oligochaete species found in all samples. DNA sequencing included a fragment of the mitochondrial cytochrome c oxidase subunit I (COI) gene, and a fragment of the nuclear histone 3 (H3) gene. For comparison, specimens from laboratory cultures of E...
February 21, 2018: Zootaxa
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