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epstein barr gene

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https://www.readbyqxmd.com/read/27903901/core-binding-factor-cbf-is-required-for-epstein-barr-virus-ebna3-proteins-to-regulate-target-gene-expression
#1
Kostas Paschos, Quentin Bazot, Guiyi Ho, Gillian A Parker, Jonathan Lees, Geraint Barton, Martin J Allday
ChIP-seq performed on lymphoblastoid cell lines (LCLs), expressing epitope-tagged EBNA3A, EBNA3B or EBNA3C from EBV-recombinants, revealed important principles of EBNA3 binding to chromatin. When combined with global chromatin looping data, EBNA3-bound loci were found to have a singular character, each directly associating with either EBNA3-repressed or EBNA3-activated genes, but not with both. EBNA3A and EBNA3C showed significant association with repressed and activated genes. Significant direct association for EBNA3B loci could only be shown with EBNA3B-repressed genes...
November 29, 2016: Nucleic Acids Research
https://www.readbyqxmd.com/read/27902324/ebi2-expression-in-b-lymphocytes-is-controlled-by-the-epstein-barr-virus-transcription-factor-brrf1-na-during-viral-infection
#2
Caleb Cornaby, Jilian L Jafek, Cameron Birrell, Vera Mayhew, Lauren Syndergaard, Jeffrey Mella, Wesley Cheney, Brian D Poole
EBI2 is an important chemotactic receptor that is involved in proper B-cell T-cell interactions. Epstein-Barr Virus (EBV) has been shown to upregulate this gene upon infection of cell lines, but the timing and mechanism of this upregulation, as well as its importance to EBV infection, remain unknown. This work investigated EBV's manipulation of EBI2 expression of primary naïve B cells. EBV infection induces EBI2 expression resulting in elevated levels of EBI2 after 24 hours until 7 days post-infection, followed by a dramatic decline (p = 0...
November 16, 2016: Journal of General Virology
https://www.readbyqxmd.com/read/27900846/plasmablastic-lymphoma-mimicking-carcinomatosis-a-case-report-and-review-of-the-literature
#3
Andrea M Olofson, Eric Y Loo, Paul A Hill, Xiaoying Liu
First identified as a distinct disease entity in HIV-positive patients, plasmablastic lymphoma is a rare aggressive disease which arises predominantly in men and is associated with immunodeficiency of all causes. Although its exact etiology is poorly understood, Epstein-Barr virus infection and MYC gene aberrations have been implicated in its development in both HIV-positive and HIV-negative patients. The disease typically involves extranodal sites with a predilection for the oral cavity but may occur in other locations...
November 30, 2016: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/27886133/epigenetic-impact-on-ebv-associated-b-cell-lymphomagenesis
#4
REVIEW
Shatadru Ghosh Roy, Erle S Robertson, Abhik Saha
Epigenetic modifications leading to either transcriptional repression or activation, play an indispensable role in the development of human cancers. Epidemiological study revealed that approximately 20% of all human cancers are associated with tumor viruses. Epstein-Barr virus (EBV), the first human tumor virus, demonstrates frequent epigenetic alterations on both viral and host genomes in associated cancers-both of epithelial and lymphoid origin. The cell type-dependent different EBV latent gene expression patterns appear to be determined by the cellular epigenetic machinery and similarly viral oncoproteins recruit epigenetic regulators in order to deregulate the cellular gene expression profile resulting in several human cancers...
November 24, 2016: Biomolecules
https://www.readbyqxmd.com/read/27882252/sj%C3%A3-gren-s-syndrome-complicated-by-myeloid-natural-killer-cell-precursor-acute-leukemia-case-report-and-review-of-the-literature
#5
Hao Feng, Jianlin Qiao, Ningning Ding, Wei Chen, Kunming Qi, Xiuying Pan, Jiang Cao, Kailin Xu
We report a case of Sjögren's syndrome (SS) complicated by myeloid/natural killer (NK) cell precursor acute leukemia (M/NKPAL). A 75-year-old woman with a previous SS history for 2 years was routinely treated. Peripheral blood progenitor cells were increased, and subsequent bone marrow cell morphology examination showed the presence of acute myeloid leukemia type M4. However, flow cytometry analysis revealed that CD7/CD56/CD33/CD34/HLA-DR/cCD3 were all positive and myeloperoxidase- (MPO-) specific staining, other T cells, NK cells, and myeloid markers were all negative...
2016: Case Reports in Hematology
https://www.readbyqxmd.com/read/27865457/viral-carcinogenesis
#6
A J Smith, L A Smith
Cancer has been recognized for thousands of years. Egyptians believed that cancer occurred at the will of the gods. Hippocrates believed human disease resulted from an imbalance of the four humors: blood, phlegm, yellow bile, and black bile with cancer being caused by excess black bile. The lymph theory of cancer replaced the humoral theory and the blastema theory replaced the lymph theory. Rudolph Virchow was the first to recognize that cancer cells like all cells came from other cells and believed chronic irritation caused cancer...
2016: Progress in Molecular Biology and Translational Science
https://www.readbyqxmd.com/read/27864689/epstein-barr-virus-infection-and-gene-promoter-hypermethylation-in-rheumatoid-arthritis-patients-with-methotrexate-associated-b-cell-lymphoproliferative-disorders
#7
Kozue Ejima-Yamada, Yumi Oshiro, Seiichi Okamura, Tomoaki Fujisaki, Yasuhito Mihashi, Kazuo Tamura, Tomoko Fukushige, Masaru Kojima, Kazutoshi Shibuya, Morishige Takeshita
We analyzed CpG-island hypermethylation status in 12 genes of paraffin-embedded tissues from 38 rheumatoid arthritis (RA) patients with methotrexate (MTX)-associated large B cell lymphoproliferative disorder (BLPD), 11 RA patients with non-MTX-associated BLPD (non-MTX-BLPD), 22 controls with diffuse large B cell lymphoma (DLBCL), and 10 controls with Epstein-Barr virus (EBV)(+) DLBCL. Among them, tumor cells from EBV(+) MTX-BLPD patients and control EBV(+) DLBCL patients had significantly lower median incidence of CpG island methylator phenotype (CIMP) than those from non-MTX-BLPD and control DLBCL groups (2...
November 18, 2016: Virchows Archiv: An International Journal of Pathology
https://www.readbyqxmd.com/read/27864512/epstein-barr-virus-super-enhancer-ernas-are-essential-for-myc-oncogene-expression-and-lymphoblast-proliferation
#8
Jun Liang, Hufeng Zhou, Catherine Gerdt, Min Tan, Tyler Colson, Kenneth M Kaye, Elliott Kieff, Bo Zhao
Epstein-Barr virus (EBV) super-enhancers (ESEs) are essential for lymphoblastoid cell (LCL) growth and survival. Reanalyses of LCL global run-on sequencing (Gro-seq) data found abundant enhancer RNAs (eRNAs) being transcribed at ESEs. Inactivation of ESE components, EBV nuclear antigen 2 (EBNA2) and bromodomain-containing protein 4 (BRD4), significantly decreased eRNAs at ESEs -428 and -525 kb upstream of the MYC oncogene transcription start site (TSS). shRNA knockdown of the MYC -428 and -525 ESE eRNA caused LCL growth arrest and reduced cell growth...
November 18, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27855219/the-epstein-barr-virus-immunoevasins-bcrf1-and-bplf1-are-expressed-by-a-mechanism-independent-of-the-canonical-late-pre-initiation-complex
#9
Jessica McKenzie, Francesc Lopez-Giraldez, Henri-Jacques Delecluse, Ann Walsh, Ayman El-Guindy
Subversion of host immune surveillance is a crucial step in viral pathogenesis. Epstein-Barr virus (EBV) encodes two immune evasion gene products, BCRF1 (viral IL-10) and BPLF1 (deubiquitinase/deneddylase); both proteins suppress antiviral immune responses during primary infection. The BCRF1 and BPLF1 genes are expressed during the late phase of the lytic cycle, an essential but poorly understood phase of viral gene expression. Several late gene regulators recently identified in beta and gamma herpesviruses form a viral pre-initiation complex for transcription...
November 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27847111/the-epstein-barr-virus-ebna2-protein-induces-a-subset-of-notch-target-genes-in-thyroid-cancer-cell-lines-but-fails-to-suppress-proliferation
#10
Sean Golden, Xiao-Min Yu, Scott Odorico, Vansh Jain, Ana Marin, Shidong Ma, Shannon Kenney, Herbert Chen
BACKGROUND: Epstein-Barr virus is associated with lymphoid and epithelial malignancies and has been reported to infect thyroid cells. The Epstein-Barr virus protein, EBNA2, regulates viral and cellular promoters by binding to RBP-jκ. Similarly, NOTCH1, a tumor suppressor protein in thyroid epithelial cells, competes with EBNA2 for binding to overlapping sites on RBP-jκ. EBNA2 activates a subset of NOTCH-responsive genes in lymphocytes and myocytes; however, the effect of EBNA2 expression on NOTCH targets in epithelial cells is unknown...
November 12, 2016: Surgery
https://www.readbyqxmd.com/read/27837274/regulation-of-the-viral-life-cycle-by-murine-gammaherpesvirus-68-micrornas
#11
Soowon Kang, Chanoh Jeon, Kyungtaek Im, Moon Jung Song, Hyeyoung Min
γ-Herpesviruses (γHV) such as Epstein-Barr virus and Kaposi's sarcoma-associated herpesvirus are important human pathogens involved in lymphoproliferation and tumorigenesis. Murine gammaherpesvirus 68 (MHV-68, γHV-68) is an effective model for the study of γHV pathogenesis and host-virus interaction because it is closely related to human γHV. Similarly to human γHV, MHV-68 encodes 15 microRNAs (miRNAs). Although their functions remain unknown, they are thought to regulate the viral life cycle or host-virus interactions, similarly to other human γHV...
November 11, 2016: Archives of Virology
https://www.readbyqxmd.com/read/27835598/snhg8-is-identified-as-a-key-regulator-of-epstein-barr-virus-ebv-associated-gastric-cancer-by-an-integrative-analysis-of-lncrna-and-mrna-expression
#12
Tao Huang, Yan Ji, Dan Hu, Baozheng Chen, Hejun Zhang, Chao Li, Gang Chen, Xingguang Luo, Xiong-Wei Zheng, Xiandong Lin
The Epstein-Barr virus (EBV) is associated with a variety of cancers, including gastric cancer, which has one of the highest mortality rates of all human cancers. Long non-coding RNAs (lncRNAs) have been suggested to have important causal roles in gastric cancer. However, the interaction between lncRNAs and EBV has not yet been studied. To this end, we sequenced 11,311 lncRNAs and 144,826 protein-coding transcripts from four types of tissue: one non-EBV-infected gastric carcinoma (EBVnGC) and its adjacent normal tissue, and one EBV-associated gastric carcinoma (EBVaGC) and its adjacent normal tissue...
November 7, 2016: Oncotarget
https://www.readbyqxmd.com/read/27830995/oncogenic-role-of-tumor-viruses-in-humans
#13
Nimrah Akram, Muhammad Imran, Mamoona Noreen, Fayyaz Ahmed, Muhammad Atif, Zareen Fatima, Ahmed Bilal Waqar
Viruses are the intracellular pathogens that reproduce only in the living cell and manipulate the cellular machinery to produce more viruses. Viral replications can affect cellular genes of the host in multiple cancerous ways. Approximately, 20% of all human oncogenesis is caused by cancer-causing viruses known as oncoviruses. Viral infection causes chronic inflammation leading to cell death, uncontrollable proliferation, and modulated expression of some of the regulatory proteins. Oncogenesis is a multistep phenomenon in which normal host cells are transformed into cancerous cells on the basis of host genetic variability...
November 10, 2016: Viral Immunology
https://www.readbyqxmd.com/read/27829228/tet2-functions-as-a-resistance-factor-against-dna-methylation-acquisition-during-epstein-barr-virus-infection
#14
Hiroe Namba-Fukuyo, Sayaka Funata, Keisuke Matsusaka, Masaki Fukuyo, Bahityar Rahmutulla, Yasunobu Mano, Masashi Fukayama, Hiroyuki Aburatani, Atsushi Kaneda
Extensive DNA methylation is observed in gastric cancer with Epstein-Barr virus (EBV) infection, and EBV infection is the cause to induce this extensive hypermethylaton phenotype in gastric epithelial cells. However, some 5' regions of genes do not undergo de novo methylation, despite the induction of methylation in surrounding regions, suggesting the existence of a resistance factor against DNA methylation acquisition. We conducted an RNA-seq analysis of gastric epithelial cells with and without EBV infection and found that TET family genes, especially TET2, were repressed by EBV infection at both mRNA and protein levels...
November 5, 2016: Oncotarget
https://www.readbyqxmd.com/read/27813134/establishment-and-characterization-of-a-novel-hodgkin-lymphoma-cell-line-am-hlh-carrying-the-epstein-barr-virus-genome-integrated-into-the-host-chromosome
#15
Masahiko Hayashida, Masanori Daibata, Erika Tagami, Takahiro Taguchi, Fumiyo Maekawa, Kayo Takeoka, Katsuhiro Fukutsuka, Daiki Shimomura, Takamasa Hayashi, Yoshinori Iwatani, Hitoshi Ohno
We describe the establishment and characterization of a cell line, AM-HLH, obtained from a patient with Epstein-Barr virus-positive (EBV(+) ) nodular sclerosis-type Hodgkin lymphoma (HL). The cells were positive for CD2 and CD30 and negative for CD15. The immunoglobulin heavy- and κ light-chain genes were rearranged. The karyotype was of the triploid range. Southern blotting using the EBV terminal repeat probe detected 3 hybridizing bands that were identical to those of the parental HL material. The cells expressed EBV-encoded RNAs as well as latent genes (EBNA1, EBNA2, LMP1, and LMP2A) and lytic genes (BZLF1 and BALF2)...
November 4, 2016: Hematological Oncology
https://www.readbyqxmd.com/read/27805626/pd-1-pd-l1-immune-checkpoint-blockade-in-b-cell-lymphomas
#16
REVIEW
Aaron Goodman, Sandip P Patel, Razelle Kurzrock
Cancer cells can escape T-cell-mediated cellular cytotoxicity by exploiting the inhibitory programmed cell-death protein 1 (PD-1)/programmed cell death 1 ligand 1 (PD-L1) immune checkpoint. Indeed, therapeutic antibodies that block the PD-1-PD-L1 axis induce durable clinical responses against a growing list of solid tumours. B-cell lymphomas also leverage this checkpoint to escape immune recognition, although the outcomes of PD-1-PD-L1 blockade, and the correlations between PD-L1 expression and treatment responses, are less-well elucidated in these diseases than in solid cancers...
November 2, 2016: Nature Reviews. Clinical Oncology
https://www.readbyqxmd.com/read/27796281/epstein-barr-virus-ebv-bamhi-a-rightward-transcript-bart-6-and-cellular-microrna-142-synergistically-compromise-immune-defense-of-host-cells-in-ebv-positive-burkitt-lymphoma
#17
Ling Zhou, Yunwen Bu, Yanyan Liang, Fang Zhang, Haiguo Zhang, Shumei Li
BACKGROUND This study was designed to explore the molecular mechanism underlying the effect of cellular miRNAs and EBV miRNA upon the expression of targets such as PTEN, and their involvement in the pathogenesis of Burkitt lymphoma. MATERIAL AND METHODS In this study, we examined several differentially expressed cellular miRNAs in EBV-positive versus EBV-negative Burkett lymphoma tissue samples, and confirmed PTEN as targets of cellular miR-142 by using a bioinformatics tool, luciferase reporter system, oligo transfection, real-time PCR, and Western blot analysis...
October 31, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27793264/perturbing-purinergic-signaling-a-pathogen-s-guidebook-to-counteracting-inflammatory-responses
#18
EDITORIAL
Emma L Walton
In this issue of the Biomedical Journal, we learn how bacteria and parasites alike counteract inflammatory signaling by manipulating purinergic signaling. We also focus on an original article shedding light on the role of an Epstein-Barr virus encoded gene in metastasis in nasopharyngeal carcinoma. Finally, we learn about a possible link between Trichomonas vaginalis and recurrent urinary tract infection.
August 2016: Biomedical Journal
https://www.readbyqxmd.com/read/27781387/clinical-presentation-and-outcome-of-pediatric-patients-with-hemophagocytic-lymphohistiocytosis-in-china-a-retrospective-multicenter-study
#19
Xiao-Jun Xu, Hong-Sheng Wang, Xiu-Li Ju, Pei-Fang Xiao, Yan Xiao, Hong-Man Xue, Hong-Yu Shi, Yi-Jin Gao, Guo-Cun Jia, Xue-Rong Li, Wei-Hong Zhao, Ning-Ling Wang, Yong-Min Tang
BACKGROUND: Hemophagocytic lymphohistiocytosis (HLH) is a heterogeneous disease with major diagnostic and therapeutic difficulties. A large-scale multicenter study of pediatric HLH is still lacking in China. PROCEDURE: The Histiocytosis Study Group of the Chinese Pediatric Society conducted this retrospective study in 2014. A total of 323 patients diagnosed with HLH between 2011 and 2013 from 12 hospitals were registered. RESULTS: The median age at diagnosis was 2...
October 26, 2016: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/27765925/receptor-tyrosine-kinase-amplified-gastric-cancer-clinicopathologic-characteristics-and-proposed-screening-algorithm
#20
Cheol Keun Park, Ji Soo Park, Hyo Song Kim, Sun Young Rha, Woo Jin Hyung, Jae-Ho Cheong, Sung Hoon Noh, Sang Kil Lee, Yong Chan Lee, Yong-Min Huh, Hyunki Kim
Although targeted therapy for receptor tyrosine kinases (RTKs) of advanced gastric cancers (AGCs) has been in the spotlight, guidelines for the identification of RTK-amplified gastric cancers (RA-GCs) have not been established. In this study, we investigate clinicopathologic characteristics of RA-GCs and propose a screening algorithm for their identification. We performed immunohistochemistry (IHC) for MLH1, MSH2, PMS2, MSH6, key RTKs (EGFR, HER2, MET), and p53, in situ hybridization for Epstein-Barr virus encoding RNA, and silver in situ hybridization (SISH) for EGFR, HER2, and MET using tissue microarrays of 993 AGCs...
September 27, 2016: Oncotarget
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