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https://www.readbyqxmd.com/read/28712115/expression-of-interferon-regulatory-factor-7-correlates-with-the-expression-of-epstein-barr-virus-latent-membrane-protein-1-and-cervical-lymph-node-metastasis-in-nasopharyngeal-cancer
#1
Satoru Kondo, Kazuhira Endo, Naohiro Wakisaka, Mitsuharu Aga, Makoto Kano, Noriko Seishima, Tomoko Imoto, Eiji Kobayashi, Makiko Moriyama-Kita, Yosuke Nakanishi, Shigeyuki Murono, Joseph S Pagano, Tomokazu Yoshizaki
Interferon regulatory factor 7 (IRF7) has oncogenic properties in several malignancies such as Epstein-Barr virus (EBV)-associated lymphoma. However, there is no evidence whether IRF7 is associated with the oncogenesis of nasopharyngeal cancer (NPC), the pathogenesis of which is closely associated with EBV. Herein, we report that expression of IRF7 was increased in normal nasopharyngeal cells that expressed the EBV principal oncoprotein, latent membrane protein 1 (LMP1). In addition, IRF7 was mainly expressed in the nucleus in both normal nasopharyngeal cells and nasopharyngeal cancer cells that expresses LMP1...
July 16, 2017: Pathology International
https://www.readbyqxmd.com/read/28699226/ebv-provides-survival-factors-to-ebv-dlbcl-lines-and-modulates-cytokine-induced-specific-chemotaxis-in-ebv-dlbcl
#2
Liang Wu, Barbro Ehlin-Henriksson, Xiaoying Zhou, Hong Zhu, Ingemar Ernberg, Lorand L Kis, George Klein
Diffuse large B-cell lymphoma (DLBCL), the most common type of malignant lymphomas, account for 30% of adult non-Hodgkin lymphomas (NHLs). EBV-positive DLBCL of the elderly is a newly recognized subtype that accounts for 8% to 10% of DLBCL in Asian countries, but is less common in Western populations. Five DLBCL derived cell lines were employed to characterize patterns of EBV latent gene expression, as well as response to cytokines and chemotaxis. IL-4 and IL-21 modified LMP1-, EBNA1- and EBNA2-expression depending on cell phenotype and type of EBV latent program (type I, II or III)...
July 12, 2017: Immunology
https://www.readbyqxmd.com/read/28654015/lmp1-and-dynamic-progressive-telomere-dysfunction-a-major-culprit-in-ebv-associated-hodgkin-s-lymphoma
#3
REVIEW
Hans Knecht, Sabine Mai
Epstein-Barr virus (EBV)-encoded latent membrane protein 1 (LMP1) is expressed in germinal-center-derived, mononuclear Hodgkin (H) and multinuclear, diagnostic Reed-Sternberg (RS) cells in classical EBV-positive Hodgkin's lymphoma (cHL). LMP1 expression in EBV-negative H-cell lines results in a significantly increased number of RS cells. In a conditional, germinal-center-derived B-cell in vitro system, LMP1 reversibly down-regulates the shelterin proteins, telomeric repeat binding factor (TRF)1, TRF2, and protection of telomeres (POT)1...
June 27, 2017: Viruses
https://www.readbyqxmd.com/read/28637758/genome-wide-analysis-of-eighteen-epstein-barr-viruses-isolated-from-primary-nasopharyngeal-carcinoma-biopsies
#4
Chaofeng Tu, Zhaoyang Zeng, Peng Qi, Xiayu Li, Zhengyuan Yu, Can Guo, Fang Xiong, Bo Xiang, Ming Zhou, Zhaojian Gong, Qianjin Liao, Jianjun Yu, Yi He, Wenling Zhang, Xiaoling Li, Yong Li, Guiyuan Li, Wei Xiong
Epstein-Barr virus (EBV) is a ubiquitous gamma-herpesvirus that is highly prevalent in almost all human populations, and is associated with many human cancers such as nasopharyngeal carcinoma (NPC), Hodgkin's disease, and gastric carcinoma. However, in these EBV-associated cancers, only NPC exhibits remarkable ethnic and geographic distribution. We hypothesized that EBV genomic variations might contribute to the pathogenesis of different human cancers in different geographic areas. In this study, we collected 18 NPC biopsies from the Hunan Province in Southern China and de novo assembled 18 NPC biopsy specimen-derived EBV (NPC-EBV) genomes, designated as HN1 to HN18...
June 21, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28571489/thioredoxin-1-chemokine-c-x-c-motif-ligand-9-and-interferon-%C3%AE-expression-in-the-neoplastic-cells-and-macrophages-of-hodgkin-lymphoma-clinicopathologic-correlations-and-potential-prognostic-implications
#5
Theodoros P Vassilakopoulos, Georgia Levidou, Vassilis Milionis, Sylvia Hartmann, Eleftheria Lakiotaki, Athanasia Sepsa, Irene Thymara, Panagiota Ntailiani, Kallirroi Spanou, Maria K Angelopoulou, Marina P Siakantaris, Maria Moschogiannis, Gerassimos A Pangalis, Panayiotis Panayiotidis, Kostas Konstantopoulos, Efstratios Patsouris, Martin-Leo Hansmann, Penelope Korkolopoulou
Expression of thioredoxin-1 (TXN) and CXCL9 is not restricted to THRLBCL macrophages, but may be observed in histiocytes and neoplastic (HRS) cells of EBV + mixed cellularity (MC) classical Hodgkin lymphoma (cHL) and nodular lymphocyte predominant HL. We aimed to validate and extend the above observations in 174 cHL patients evaluating the immunohistochemical expression of TXN, CXCL9 and IFN-γ. HRS-cell CXCL9 expression was higher in latent membrane protein-1 (LMP1)+, MC and Stage IV. TXN and CXCL9 expression by cHL histiocytes was more frequent in LMP1+, MC and older patients (only for CXCL9)...
September 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28566607/development-of-extranodal-nk-t-cell-lymphoma-nasal-type-in-cerebrum-following-epstein-barr-virus-positive-uveitis
#6
Ayano Imai, Hiroshi Takase, Ken-Ichi Imadome, Go Matsuda, Iichiro Ohnishi, Kouhei Yamamoto, Takumi Kudo, Yoji Tanaka, Taketoshi Maehara, Osamu Miura, Ayako Arai
A 74-year-old woman developed bilateral uveitis with high Epstein-Barr virus (EBV) DNA load in the vitreous fluid without lymphoma cells. Four years after the onset, T2-weighted contrast-enhanced MRI revealed hyperintense lesions in the right occipital and parietal lobe. A biopsy resulted in the diagnosis of extranodal NK/T-cell lymphoma nasal type (ENKL). The repeat region of LMP1, an EBV gene, detected in the brain lesion was identical to that detected in the vitreous fluid. ENKL of the central nervous system is quite rare, and the pathogenesis has not been determined...
2017: Internal Medicine
https://www.readbyqxmd.com/read/28515656/isolation-and-characterization-of-listeria-phages-for-control-of-growth-of-listeria-monocytogenes-in-milk
#7
Sunhee Lee, Min Gon Kim, Hee Soo Lee, Sunhak Heo, Mirae Kwon, GeunBae Kim
In this study, two Listeria bacteriophages, LMP1 and LMP7, were isolated from chicken feces as a means of biocontrol of L. monocytogenes. Both bacteriophages had a lytic effect on L. monocytogenes ATCC 7644, 15313, 19114, and 19115. Phages LMP1 and LMP7 were able to inhibit the growth of L. monocytogenes ATCC 7644 and 19114 in tryptic soy broth at 10°C and 30°C. Nevertheless, LMP1 was more effective than LMP7 at inhibiting L. monocytogenes ATCC 19114. On the contrary, LMP7 was more effective than LMP1 at inhibiting L...
2017: Korean Journal for Food Science of Animal Resources
https://www.readbyqxmd.com/read/28515295/natural-variation-of-epstein-barr-virus-genes-proteins-and-pri-mirna-revised
#8
Samantha Correia, Anne Palser, Claudio Elgueta Karstegl, Jaap M Middeldorp, Octavia Ramayanti, Jeffrey I Cohen, Allan Hildesheim, Maria Dolores Fellner, Joelle Wiels, Robert E White, Paul Kellam, Paul J Farrell
Viral gene sequences from an enlarged set of about 200 Epstein-Barr virus (EBV) strains including many primary isolates have been used to investigate variation in key viral genetic regions, particularly LMP1, Zp, gp350, EBNA1 and the BART miRNA cluster 2. Determination of type 1 and type 2 EBV in saliva samples from people from a wide range of geographic and ethnic backgrounds demonstrates a small percentage of healthy white Caucasian British people carrying predominantly type 2 EBV. Linkage of Zp and gp350 variants to type 2 EBV is likely to be due to their genes being adjacent to the EBNA3 locus, which is one of the major determinants of the type 1/type 2 distinction...
May 17, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28494239/crispr-cas9-screens-reveal-epstein-barr-virus-transformed-b-cell-host-dependency-factors
#9
Yijie Ma, Michael J Walsh, Katharina Bernhardt, Camille W Ashbaugh, Stephen J Trudeau, Isabelle Y Ashbaugh, Sizun Jiang, Chang Jiang, Bo Zhao, David E Root, John G Doench, Benjamin E Gewurz
Epstein-Barr virus (EBV) causes endemic Burkitt lymphoma (BL) and immunosuppression-related lymphomas. These B cell malignancies arise by distinct transformation pathways and have divergent viral and host expression programs. To identify host dependency factors resulting from these EBV+, B cell-transformed cell states, we performed parallel genome-wide CRISPR/Cas9 loss-of-function screens in BL and lymphoblastoid cell lines (LCLs). These highlighted 57 BL and 87 LCL genes uniquely important for their growth and survival...
May 10, 2017: Cell Host & Microbe
https://www.readbyqxmd.com/read/28487787/ebv-negative-monomorphic-b-cell-posttransplant-lymphoproliferative-disorder-with-marked-morphologic-pleomorphism-and-pathogenic-mutations-in-asxl1-bcor-cdkn2a-nf1-and-tp53
#10
Agata M Bogusz
Posttransplant lymphoproliferative disorders (PTLDs) are a diverse group of lymphoid or plasmacytic proliferations frequently driven by Epstein-Barr virus (EBV). EBV-negative PTLDs appear to represent a distinct entity. This report describes an unusual case of a 33-year-old woman that developed a monomorphic EBV-negative PTLD consistent with diffuse large B-cell lymphoma (DLBCL) 13 years after heart-lung transplant. Histological examination revealed marked pleomorphism of the malignant cells including nodular areas reminiscent of classical Hodgkin lymphoma (cHL) with abundant large, bizarre Hodgkin-like cells...
2017: Case Reports in Hematology
https://www.readbyqxmd.com/read/28454117/elimination-of-lmp1-expressing-cells-from-a-monolayer-of-gastric-cancer-ags-cells
#11
Yoshitaka Sato, Shingo Ochiai, Takayuki Murata, Teru Kanda, Fumi Goshima, Hiroshi Kimura
Epstein-Barr virus (EBV) latently infects malignant epithelial cells in approximately 10% of all gastric cancers. Latent membrane protein 1 (LMP1), an oncogenic protein, plays an important role in malignant transformation in EBV-associated nasopharyngeal carcinoma and B-cell lymphoma; however, its expression has not been detected in EBV-associated gastric cancer. To address why LMP1 has not been detected in EBV-positive gastric tumors, we focused on the interactions between LMP1-positive and -negative cells and stably expressed LMP1 in the gastric cancer cell line AGS...
June 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/28445949/lmp1-slamf1high-cells-are-associated-with-drug-resistance-in-epstein-barr-virus-positive-farage-cells
#12
Heejei Yoon, Young Hyeh Ko
How Epstein-Barr virus (EBV) affects the clinical outcome of EBV-positive diffuse large B-cell lymphoma (DLBCL) remains largely unknown. The viral oncogene LMP1 is at the crux of tumorigenesis and cell survival. Therefore, we examined the association between LMP1high cells drug resistance. We first assessed SLAMF1 as a surrogate marker for LMP1high cells. LMP1 and its target gene CCL22 were highly expressed in SLAMF1high Farage cells. These cells survived longer following treatment with a combination of cyclophosphamide, doxorubicin, vincristine and prednisone (CHOP)...
April 11, 2017: Oncotarget
https://www.readbyqxmd.com/read/28436953/disruption-of-direct-3d-telomere-trf2-interaction-through-two-molecularly-disparate-mechanisms-is-a-hallmark-of-primary-hodgkin-and-reed-sternberg-cells
#13
Hans Knecht, Nathalie A Johnson, Tina Haliotis, Daniel Lichtensztejn, Sabine Mai
In classical Hodgkin's lymphoma (cHL), specific changes in the 3D telomere organization cause progression from mononuclear Hodgkin cells (H) to multinucleated Reed-Sternberg cells (RS). In a post-germinal center B-cell in vitro model, permanent latent membrane protein 1 (LMP1) expression, as observed in Epstein-Barr virus (EBV)-associated cHL, results in multinuclearity and complex chromosomal aberrations through downregulation of key element of the shelterin complex, the telomere repeat binding factor 2 (TRF2)...
April 24, 2017: Laboratory Investigation; a Journal of Technical Methods and Pathology
https://www.readbyqxmd.com/read/28427406/latent-membrane-protein-1-lmp1-expression-in-hodgkin-lymphoma-and-its-correlation-with-clinical-and-histologic-parameters
#14
Atif Ali Hashmi, Zubaida Fida Hussain, Kashif Ali Hashmi, Muhammad Irfan Zafar, Muhammad Muzzammil Edhi, Naveen Faridi, Mehmood Khan
BACKGROUND: Hodgkin lymphoma is one of the most prevalent lymphoproliferative disorders in Pakistan; however, no risk factors for this disease have yet to be established in our population. Epstein-Barr virus (EBV) is a well-known risk factor for Hodgkin lymphoma in endemic regions of the world; however, frequency of its association in our population has not been widely studied. Latent membrane protein 1 (LMP1) expression by immunohistochemistry (IHC) is a surrogate marker of EBV in Hodgkin lymphoma...
April 20, 2017: World Journal of Surgical Oncology
https://www.readbyqxmd.com/read/28425914/epstein-barr-virus-ensures-b-cell-survival-by-uniquely-modulating-apoptosis-at-early-and-late-times-after-infection
#15
Alexander M Price, Joanne Dai, Quentin Bazot, Luv Patel, Pavel A Nikitin, Reza Djavadian, Peter S Winter, Cristina A Salinas, Ashley Perkins Barry, Kris C Wood, Eric C Johannsen, Anthony Letai, Martin J Allday, Micah A Luftig
Latent Epstein-Barr virus (EBV) infection is causally linked to several human cancers. EBV expresses viral oncogenes that promote cell growth and inhibit the apoptotic response to uncontrolled proliferation. The EBV oncoprotein LMP1 constitutively activates NFκB and is critical for survival of EBV-immortalized B cells. However, during early infection EBV induces rapid B cell proliferation with low levels of LMP1 and little apoptosis. Therefore, we sought to define the mechanism of survival in the absence of LMP1/NFκB early after infection...
April 20, 2017: ELife
https://www.readbyqxmd.com/read/28383415/prognostic-significance-of-latent-membrane-protein-1-expression-in-non-hodgkin-lymphoma-a-meta-analysis
#16
Xiao-Mei Li, Wen-Hua Xiao, Hui-Xia Zhao
BACKGROUND: The prognostic value of latent membrane protein 1 (LMP1) in non-Hodgkin lymphoma (NHL) has been evaluated in several studies. However, the conclusions remain controversial. METHODS: We searched relevant literatures from Embase, PubMed, and China National Knowledge Infrastructure Platform databases and performed a meta-analysis to evaluate the prognostic significance of LMP1 expression in NHL. Pooled hazard ratio (HR), 95% confidence interval (CI), and P value were calculated...
April 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28356886/analysis-of-the-variability-of-epstein-barr-virus-genes-in-infectious-mononucleosis-investigation-of-the-potential-correlation-with-biochemical-parameters-of-hepatic-involvement
#17
Ana Banko, Ivana Lazarevic, Goran Stevanovic, Andja Cirkovic, Danijela Karalic, Maja Cupic, Bojan Banko, Jovica Milovanovic, Tanja Jovanovic
BACKGROUND: Primary Epstein-Barr virus (EBV) infection is usually asymptomatic, although at times it results in the benign lymphoproliferative disease, infectious mononucleosis (IM), during which almost half of patients develop hepatitis. The aims of the present study are to evaluate polymorphisms of EBV genes circulating in IM isolates from this geographic region and to investigate the correlation of viral sequence patterns with the available IM biochemical parameters. METHODS: The study included plasma samples from 128 IM patients...
September 2016: Journal of Medical Biochemistry
https://www.readbyqxmd.com/read/28351978/mouse-model-of-epstein-barr-virus-lmp1-and-lmp2a-driven-germinal-center-b-cell-lymphoproliferative-disease
#18
Takeharu Minamitani, Yijie Ma, Hufeng Zhou, Hiroshi Kida, Chao-Yuan Tsai, Masanori Obana, Daisuke Okuzaki, Yasushi Fujio, Atsushi Kumanogoh, Bo Zhao, Hitoshi Kikutani, Elliott Kieff, Benjamin E Gewurz, Teruhito Yasui
Epstein-Barr virus (EBV) is a major cause of immunosuppression-related B-cell lymphomas and Hodgkin lymphoma (HL). In these malignancies, EBV latent membrane protein 1 (LMP1) and LMP2A provide infected B cells with surrogate CD40 and B-cell receptor growth and survival signals. To gain insights into their synergistic in vivo roles in germinal center (GC) B cells, from which most EBV-driven lymphomas arise, we generated a mouse model with conditional GC B-cell LMP1 and LMP2A coexpression. LMP1 and LMP2A had limited effects in immunocompetent mice...
May 2, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28350509/epstein-barr-virus-and-its-association-with-fascin-expression-in-colorectal-cancers-in-the-syrian-population-a-tissue-microarray-study
#19
Noor Al-Antary, Hanan Farghaly, Tahar Aboulkassim, Amber Yasmeen, Nizar Akil, Ala-Eddin Al Moustafa
Colorectal cancer (CRC) is the third most common malignancy in both men and women worldwide. Colorectal carcinogenesis is a complex, multistep process involving environmental and lifestyle features as well as sequential genetic changes in addition to bacterial and viral infections. Viral infection has a proven role in the incidence of approximately 20% of human cancers including gastric malignancies. Accordingly, Epstein-Barr virus (EBV) has been recently shown to be present in human gastric cancers, which could play an important role in the initiation and progression of these cancers...
July 3, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28346502/ebv-induces-persistent-nf-%C3%AE%C2%BAb-activation-and-contributes-to-survival-of-ebv-positive-neoplastic-t-or-nk-cells
#20
Honami Takada, Ken-Ichi Imadome, Haruna Shibayama, Mayumi Yoshimori, Ludan Wang, Yasunori Saitoh, Shin Uota, Shoji Yamaoka, Takatoshi Koyama, Norio Shimizu, Kouhei Yamamoto, Shigeyoshi Fujiwara, Osamu Miura, Ayako Arai
Epstein-Barr virus (EBV) has been detected in several T- and NK-cell neoplasms such as extranodal NK/T-cell lymphoma nasal type, aggressive NK-cell leukemia, EBV-positive peripheral T-cell lymphoma, systemic EBV-positive T-cell lymphoma of childhood, and chronic active EBV infection (CAEBV). However, how this virus contributes to lymphomagenesis in T or NK cells remains largely unknown. Here, we examined NF-κB activation in EBV-positive T or NK cell lines, SNT8, SNT15, SNT16, SNK6, and primary EBV-positive and clonally proliferating T/NK cells obtained from the peripheral blood of patients with CAEBV...
2017: PloS One
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