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https://www.readbyqxmd.com/read/29339121/hsf1-in-association-with-morc2-downregulates-argbp2-via-the-prc2-family-in-gastric-cancer-cells
#1
Yuxin Tong, Yan Li, Hui Gu, Chunyu Wang, Funan Liu, Yangguang Shao, Feng Li
Arg Kinase-binding protein 2 (ArgBP2) is considered to be a scaffold protein that coordinates multiple signaling pathways converging on cell adhesion and actin cytoskeletal organization. It also plays an important role in blocking cancer metastasis as a potential tumor suppressor. However, its regulation mechanisms in tumor migration, especially in gastric cancer, are not fully understood. Here, we identified an ArgBP2 enhancer and showed that heat shock factor 1 (HSF1) directly interacted with microrchidia CW-type zinc finger 2 (MORC2) and bound to the enhancer of ArgBP2...
January 12, 2018: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29337251/chromatin-organization-regulated-by-ezh2-mediated-h3k27me3-is-required-for-opn-induced-migration-of-bone-marrow-derived-mesenchymal-stem-cells
#2
Lingling Liu, Qing Luo, Jinghui Sun, Yang Ju, Yasuyuki Morita, Guanbin Song
Osteopontin (OPN) is a chemokine-like extracellular matrix-associated protein involved in the migration of bone marrow-derived mesenchymal stem cells (BMSCs). An increasing number of studies have found that chromatin organization may affect cellular migration. However, whether OPN regulates chromatin organization is not understood, nor are the underlying molecular mechanisms. In this study, we investigated the link between chromatin organization and BMSC migration and demonstrated that OPN-mediated BMSC migration leads to elevated levels of heterochromatin marker histone H3 lysine 27 trimethylation (H3K27me3) through the methyltransferase EZH2...
January 11, 2018: International Journal of Biochemistry & Cell Biology
https://www.readbyqxmd.com/read/29336496/donepezil-reverses-dendritic-spine-morphology-adaptations-and-fmr1-epigenetic-modifications-in-hippocampus-of-adult-rats-after-adolescent-alcohol-exposure
#3
Patrick J Mulholland, Tara L Teppen, Kelsey M Miller, Hannah G Sexton, Subhash C Pandey, H Scott Swartzwelder
BACKGROUND: Adolescent intermittent ethanol (AIE) exposure produces persistent impairments in cholinergic and epigenetic signaling and alters markers of synapses in the hippocampal formation, effects that are thought to drive hippocampal dysfunction in adult rodents. Donepezil (Aricept), a cholinesterase inhibitor, is used clinically to ameliorate memory-related cognitive deficits. Given that donepezil also prevents morphological impairment in preclinical models of neuropsychiatric disorders, we investigated the ability of donepezil to reverse morphological and epigenetic adaptations in the hippocampus of adult rats exposed to AIE...
January 16, 2018: Alcoholism, Clinical and Experimental Research
https://www.readbyqxmd.com/read/29334892/the-genome-of-a-prasinoviruses-related-freshwater-virus-reveals-unusual-diversity-of-phycodnaviruses
#4
Hao Chen, Weijia Zhang, Xiefei Li, Yingjie Pan, Shuling Yan, Yongjie Wang
BACKGROUND: Phycodnaviruses are widespread algae-infecting large dsDNA viruses and presently contain six genera: Chlorovirus, Prasinovirus, Prymnesiovirus, Phaeovirus, Coccolithovirus and Raphidovirus. The members in Prasinovirus are identified as marine viruses due to their marine algal hosts, while prasinovirus freshwater relatives remain rarely reported. RESULTS: Here we present the complete genomic sequence of a novel phycodnavirus, Dishui Lake Phycodnavirus 1 (DSLPV1), which was assembled from Dishui Lake metagenomic datasets...
January 15, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29330921/four-and-a-half-domain-2-fhl2-scaffolding-protein-is-a-marker-of-connective-tissues-of-developing-digits-and-regulates-fibrogenic-differentiation-of-limb-mesodermal-progenitors
#5
C I Lorda-Diez, J A Montero, C Sanchez-Fernandez, J A Garcia-Porrero, J Chimal-Monroy, J M Hurle
FHL2 is a multifunctional scaffolding protein of well-known function regulating cell signaling cascades and gene transcription in cancer tissues. However, its function in embryonic systems is poorly characterized. Here, we show that Fhl2 is involved in the differentiation of connective tissues of developing limb autopod. We show that Fhl2 exhibits spatially restricted and temporally dynamic expression around the tendons of developing digits, interphalangeal joint capsules, and fibrous peridigital tissue. Immunolabeling analysis of the skeletal progenitors identified a predominant, but not exclusive, cytoplasmic distribution of FHL2 being associated with focal adhesions and actin cytoskeleton...
January 12, 2018: Journal of Tissue Engineering and Regenerative Medicine
https://www.readbyqxmd.com/read/29330200/pwwp-domain-interactor-of-polycombs11-interacts-with-polycomb-group-proteins-and-histones-and-regulates-arabidopsis-flowering-and-development
#6
Mareike L Hohenstatt, Pawel Mikulski, Olga Komarynets, Constanze Klose, Ina Kycia, Albert Jeltsch, Sara Farrona, Daniel Schubert
Polycomb-group (PcG) proteins mediate epigenetic gene regulation by setting H3K27me3 via Polycomb Repressive Complex 2 (PRC2). In plants, it is largely unclear how PcG proteins are recruited to their target genes. Here, we identified the PWWP-DOMAIN INTERACTOR OF POLYCOMBS1 (PWO1) protein, which interacts with all three Arabidopsis thaliana PRC2 histone methyltransferases and is required for maintaining full H3 occupancy at several Arabidopsis genes. PWO1 localizes and recruits CURLY LEAF to nuclear speckles in Nicotiana benthamiana nuclei, suggesting a role in spatial organization of PcG regulation...
January 12, 2018: Plant Cell
https://www.readbyqxmd.com/read/29325226/citrullinated-histone-h3-a-biomarker-of-neutrophil-extracellular-trap-formation-predicts-the-risk-of-venous-thromboembolism-in-cancer-patients
#7
Lisa-Marie Mauracher, Florian Posch, Kimberly Martinod, Ella Grilz, Thomas Däullary, Lena Hell, Christine Brostjan, Christoph Zielinski, Cihan Ay, Denisa D Wagner, Ingrid Pabinger, Johannes Thaler
BACKGROUND: Neutrophil extracellular traps (NETs) are decondensed chromatin fibers which might play a role in the prothrombotic state of cancer patients. OBJECTIVES: Here we investigated whether citrullinated histone H3 (H3Cit), a biomarker for NET formation, cell-free DNA (cfDNA), and nucleosomes predict venous thromboembolism (VTE) in cancer patients. PATIENTS/METHODS: Nine-hundred-forty-six patients with newly-diagnosed cancer or progression after remission were enrolled in this prospective observational cohort study...
January 11, 2018: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/29324871/citrullinated-histone-h3-as-a-novel-prognostic-blood-marker-in-patients-with-advanced-cancer
#8
Charlotte Thålin, Staffan Lundström, Cedric Seignez, Maud Daleskog, Annika Lundström, Peter Henriksson, Thomas Helleday, Mia Phillipson, Håkan Wallén, Mélanie Demers
Citrullinated histone H3 (H3Cit) is a central player in the neutrophil release of nuclear chromatin, known as neutrophil extracellular traps (NETs). NETs have been shown to elicit harmful effects on the host, and were recently proposed to promote tumor progression and spread. Here we report significant elevations of plasma H3Cit in patients with advanced cancer compared with age-matched healthy individuals. These elevations were specific to cancer patients as no increase was observed in severely ill and hospitalized patients with a higher non-malignant comorbidity...
2018: PloS One
https://www.readbyqxmd.com/read/29322235/-interrater-reliability-and-clinical-impact-of-the-post-ureteroscopic-lesion-scale-puls-grading-system-for-ureteral-lesions-after-ureteroscopy-results-of-the-german-prospective-multicenter-buster-project
#9
M May, M Schönthaler, C Gilfrich, I Wolff, J Peter, A Miernik, H-M Fritsche, M Burger, M Schostak, S Lebentrau
BACKGROUND: The Post-ureteroscopic Lesion Scale (PULS) was designed as a standardized classification system for ureteral lesions after uretero(reno)scopy (URS). This study evaluates its routine use and a possible clinical impact based on a representative patient cohort. MATERIALS AND METHODS: Data of 307 patients in 14 German centers within the BUSTER project were used to test 3 hypotheses (H): PULS score shows a high interrater reliability (IRR) after independent assessment by urologic surgeon and assistance personnel (H1); PULS score is correlated with the frequency of postoperative complications during hospital stay (H2); post-URS stenting of the ureter is associated with higher PULS scores (H3)...
January 10, 2018: Der Urologe. Ausg. A
https://www.readbyqxmd.com/read/29322219/sirt6-mediated-transcriptional-suppression-of-txnip-is-critical-for-pancreatic-beta-cell-function-and-survival-in-mice
#10
Kunhua Qin, Ning Zhang, Zhao Zhang, Michael Nipper, Zhenxin Zhu, Jake Leighton, Kexin Xu, Nicolas Musi, Pei Wang
AIMS/HYPOTHESIS: Better understanding of how genetic and epigenetic components control beta cell differentiation and function is key to the discovery of novel therapeutic approaches to prevent beta cell dysfunction and failure in the progression of type 2 diabetes. Our goal was to elucidate the role of histone deacetylase sirtuin 6 (SIRT6) in beta cell development and homeostasis. METHODS: Sirt6 endocrine progenitor cell conditional knockout and beta cell-specific knockout mice were generated using the Cre-loxP system...
January 10, 2018: Diabetologia
https://www.readbyqxmd.com/read/29314414/an-ortholog-of-curly-leaf-enhancer-of-zeste-like-1-is-required-for-proper-flowering-in-brachypodium-distachyon
#11
Aaron Lomax, Daniel P Woods, Yinxin Dong, Frédéric Bouché, Ying Rong, Kevin S Mayer, Xuehua Zhong, Richard M Amasino
Many plants require prolonged cold exposure to acquire the competence to flower. The process by which cold exposure results in competence is known as vernalization. In Arabidopsis thaliana, vernalization leads to the stable repression of the floral repressor FLOWERING LOCUS C via chromatin modification including an increase of trimethylation on lysine 27 of histone H3 (H3K27me3) by Polycomb Repressive Complex 2 (PRC2). Vernalization in pooids is associated with the stable induction of a floral promoter, VERNALIZATION 1...
January 4, 2018: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/29310022/loss-of-eed-leads-to-lineage-instability-and-increased-cd8-expression-of-mouse-cd4-t-cells-upon-tgf%C3%AE-signaling
#12
Taku Naito, Sawako Muroi, Ichiro Taniuchi, Motonari Kondo
Tri-methylation of lysine 27 on histone H3 (H3K27me3) is a repressive epigenetic modification catalyzed by polycomb repressive complex 2 (PRC2) that is required for proper cell fate determination as well as cellular function. Numerous studies have been performed to elucidate the role of PRC2 in T-cell differentiation and function; however, its role in the regulation of T-helper (Th) subset differentiation and identity has not been fully explored. Here, we report that Eed, an essential subunit of PRC2, is crucial to maintain the identity of CD4+ T cells under TGFβ-induced regulatory T cell (Treg)-polarizing conditions...
January 5, 2018: Molecular Immunology
https://www.readbyqxmd.com/read/29301062/regulatory-roles-of-histone-deacetylases-1-and-2-in-pb-induced-neurotoxicity
#13
Yulan Wu, Yi Xu, Xiyao Huang, Danlei Ye, Miaomiao Han, Hui-Li Wang
Lead (Pb) prevails among the environmental hazards against human health. Although increasing evidence highlights the epigenetic roles underlying the Pb-induced neurotoxicity, the exact mechanisms concerning histone acetylation and its causative agents are still at its infancy. In the present study, the roles of histone deacetylases 1 and 2 (HDAC1/2), as well as histone H3 Lys9 acetylation (Ac-H3K9), in Pb-induced neurotoxicity were investigated. Pb was administered to PC12 cells at 10 μM for 24 hours. And Sprague- Dawley rats were chronically exposed to Pb through drinking water containing 250 ppm Pb for 2 months...
January 2, 2018: Toxicological Sciences: An Official Journal of the Society of Toxicology
https://www.readbyqxmd.com/read/29300686/220-mutation-in-the-hemagglutinin-of-avian-influenza-a-h7n9-virus-alters-antigenicity-during-vaccine-strain-development
#14
Liqi Liu, Jian Lu, Zi Li, Jianfang Zhou, Junfeng Guo, Xiyan Li, Jia Liu, Yuelong Shu, Dayan Wang
Since the first confirmed case of H7N9 infection was reported in China, there have been five epidemic waves of human H7N9 infections between 2013 and 2017. The fifth wave differed from the previous four waves in that highly pathogenic avian influenza (HPAI) H7N9 viruses with multiple basic amino acids at the cleavage site were detected in humans, poultry and environmental samples. The HPAI H7N9 viruses were genetically and antigenically distinct from previous H7N9 viruses. Therefore, a new candidate vaccine virus(CVV) derived from a HPAI A/Guangdong/17SF003/2016-like virus was proposed by the World Health Organization(WHO)...
January 4, 2018: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/29299639/b7-h3-in-tumors-friend-or-foe-for-tumor-immunity
#15
REVIEW
Gen Li, Yanchun Quan, Fengyuan Che, Lijuan Wang
B7-H3 is a type I transmembrane co-stimulatory molecule of the B7 family. B7-H3 mRNA is widely distributed in most tissues; however, B7-H3 protein is not constitutively expressed. Few molecules have been shown to mediate the regulation of B7-H3 expression, and their regulatory mechanisms remain unexplored. Recently, TREM-like transcript 2 (TLT-2) has been identified as a potential receptor of B7-H3. However, TLT-2 may not be the only receptor of B7-H3, as B7-H3 has many contradictory roles. As a co-stimulatory molecule, B7-H3 increases the proliferation of both CD4+ and CD8+ T-cells and enhances cytotoxic T-cell activity...
January 3, 2018: Cancer Chemotherapy and Pharmacology
https://www.readbyqxmd.com/read/29288791/chromatin-modifications-of-htert-gene-in-htert-immortalized-human-mesenchymal-stem-cells-upon-exposure-to-radiation
#16
Nedime Serakinci, Pınar Mega Tiber, Oya Orun
Regulation of telomerase activity is thought to participate in the cellular response to ionizing radiation. Epigenetic mechanisms play a role in this regulation, as well as other mechanisms such as transcription, phosphorylation, etc. Here, we investigated chromatin modifications in telomerase promoter upon exposure to ionizing radiation in human mesenchymal stem cells (hMSC) and telomerase-immortalized hMSCs (hMSC-telo1) together with a hMSC-telo1 cell line in which TRF2 expression was partially repressed (siTRF2 hMSC-telo1)...
December 27, 2017: European Journal of Medical Genetics
https://www.readbyqxmd.com/read/29288231/sulforaphane-modifies-histone-h3-unpacks-chromatin-and-primes-defense
#17
Britta Schillheim, Irina Jansen, Stephani Baum, Carsten Bolm, Alexander Beesley, Uwe Conrath
Modern crop production calls for agrochemicals that prime plants for enhanced defense. Reliable test systems for spotting priming-inducing chemistry, however, are rare. We developed an assay for the high-throughput search for compounds that prime microbial pattern-induced secretion of antimicrobial furanocoumarins (phytoalexins) in cultured parsley cells. The screen produced 1-isothiocyanato-4-methylsulfinylbutane (sulforaphane; SFN), a secondary metabolite in many crucifers, as a novel defense priming compound...
December 29, 2017: Plant Physiology
https://www.readbyqxmd.com/read/29288053/the-histidine-phosphocarrier-protein-hpr-binds-to-the-highly-thermostable-regulator-of-sigma-d-protein-rsd-and-its-isolated-helical-fragments
#18
José L Neira, Felipe Hornos, Concetta Cozza, Ana Cámara-Artigas, Olga Abián, Adrián Velázquez-Campoy
The phosphotransferase system (PTS) controls the preferential use of sugars in bacteria and it is also involved in other processes, such as chemotaxis. It is formed by a protein cascade in which the first two proteins are general (namely, EI and HPr) and the others are sugar-specific permeases. The Rsd protein binds specifically to the RNA polymerase (RNAP) σ70 factor. We first characterized the conformational stability of Escherichia coli Rsd. And second, we delineated the binding regions of Streptomyces coelicolor, HPrsc, and E...
December 26, 2017: Archives of Biochemistry and Biophysics
https://www.readbyqxmd.com/read/29286094/sphingosine-1-phosphate-ameliorates-the-cardiac-hypertrophic-response-through-inhibiting-the-activity-of-histone-deacetylase-2
#19
Hui Yan, Shaowei Yi, Hang Zhuang, Lujin Wu, Dao Wen Wang, Jiangang Jiang
Inhibition of histone deacetylase-2 (HDAC2), which is a prohypertrophic factor in the heart, can functionally attenuate cardiac hypertrophy. The present study aimed to investigate whether sphingosine‑1‑phosphate (S1P), which has recently been reported to suppress HDAC2 activity, could ameliorate the cardiac hypertrophic response and improve cardiac function in mice with transverse aortic constriction (TAC), as well as to determine the underlying mechanisms. Briefly, 8‑week‑old male C57BL/6 mice were randomly divided into sham, TAC and TAC + S1P groups; the results indicated that S1P treatment attenuated TAC‑induced cardiac dysfunction...
December 15, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/29285138/curcumin-modulates-covalent-histone-modification-and-timp1-gene-activation-to-protect-against-vascular-injury-in-a-hypertension-rat-model
#20
Jun Hu, Tingting Shen, Jun Xie, Siyang Wang, Yue He, Fu Zhu
Hypertension is a leading risk factor for morbidity and mortality. Previous studies have reported that curcumin has anti-oxidation and anti-aging effects and inhibits histone deacetylase activity. However, it is still unclear whether curcumin could protect against vascular injury induced by hypertension. Thus, the current study examined the therapeutic effects and mechanism of curcumin on vascular injury induced by hypertension in spontaneous hypertensive rats (SHRs). The present study revealed that curcumin may improve vascular structure and attenuate coronary artery pathology...
December 2017: Experimental and Therapeutic Medicine
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