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https://www.readbyqxmd.com/read/29160853/therapeutic-strategies-against-epstein-barr-virus-associated-cancers-using-proteasome-inhibitors
#1
REVIEW
Kwai Fung Hui, Kam Pui Tam, Alan Kwok Shing Chiang
Epstein-Barr virus (EBV) is closely associated with several lymphomas (endemic Burkitt lymphoma, Hodgkin lymphoma and nasal NK/T-cell lymphoma) and epithelial cancers (nasopharyngeal carcinoma and gastric carcinoma). To maintain its persistence in the host cells, the virus manipulates the ubiquitin-proteasome system to regulate viral lytic reactivation, modify cell cycle checkpoints, prevent apoptosis and evade immune surveillance. In this review, we aim to provide an overview of the mechanisms by which the virus manipulates the ubiquitin-proteasome system in EBV-associated lymphoid and epithelial malignancies, to evaluate the efficacy of proteasome inhibitors on the treatment of these cancers and discuss potential novel viral-targeted treatment strategies against the EBV-associated cancers...
November 21, 2017: Viruses
https://www.readbyqxmd.com/read/29153068/-atypical-profile-problem-in-serological-diagnosis-of-ebv
#2
Fatma Kamer Varıcı Balcı, Özgen Alpay Özbek, Ayça Arzu Sayıner
Epstein-Barr virus (EBV) is the causative agent of infectious mononucleosis. Burkitt's lymphoma, nasopharyngeal carcinoma and post-transplant lymphoproliferative diseases are also associated with EBV. Diagnosis is frequently based on detection of specific antibodies. Using three parameters (anti VCA-IgM, anti VCA-IgG and anti EBNA-1 IgG), it is possible to define infection status and diagnose acute or past infection. However, sometimes the detection of atypical serological profiles makes it difficult to interpret these results...
October 2017: Mikrobiyoloji Bülteni
https://www.readbyqxmd.com/read/29145505/spontaneous-development-of-epstein-barr-virus-associated-human-lymphomas-in-a-prostate-cancer-xenograft-program
#3
Alberto J Taurozzi, Ramprakash Beekharry, Michelle Wantoch, Marie-Christine Labarthe, Hannah F Walker, Robert I Seed, Matthew Simms, Greta Rodrigues, James Bradford, Geertje van der Horst, Gabri van der Pluijm, Anne T Collins
Prostate cancer research is hampered by the lack of in vivo preclinical models that accurately reflect patient tumour biology and the clinical heterogeneity of human prostate cancer. To overcome these limitations we propagated and characterised a new collection of patient-derived prostate cancer xenografts. Tumour fragments from 147 unsupervised, surgical prostate samples were implanted subcutaneously into immunodeficient Rag2-/-γC-/- mice within 24 hours of surgery. Histologic and molecular characterisation of xenografts was compared with patient characteristics, including androgen-deprivation therapy, and exome sequencing...
2017: PloS One
https://www.readbyqxmd.com/read/29144413/epstein-barr-virus-hijacks-dna-damage-response-transducers-to-orchestrate-its-life-cycle
#4
REVIEW
Pok Man Hau, Sai Wah Tsao
The Epstein-Barr virus (EBV) is a ubiquitous virus that infects most of the human population. EBV infection is associated with multiple human cancers, including Burkitt's lymphoma, Hodgkin's lymphoma, a subset of gastric carcinomas, and almost all undifferentiated non-keratinizing nasopharyngeal carcinoma. Intensive research has shown that EBV triggers a DNA damage response (DDR) during primary infection and lytic reactivation. The EBV-encoded viral proteins have been implicated in deregulating the DDR signaling pathways...
November 16, 2017: Viruses
https://www.readbyqxmd.com/read/29137176/ebv-and-apoptosis-the-viral-master-regulator-of-cell-fate
#5
REVIEW
Leah Fitzsimmons, Gemma L Kelly
Epstein-Barr virus (EBV) was first discovered in cells from a patient with Burkitt lymphoma (BL), and is now known to be a contributory factor in 1-2% of all cancers, for which there are as yet, no EBV-targeted therapies available. Like other herpesviruses, EBV adopts a persistent latent infection in vivo and only rarely reactivates into replicative lytic cycle. Although latency is associated with restricted patterns of gene expression, genes are never expressed in isolation; always in groups. Here, we discuss (1) the ways in which the latent genes of EBV are known to modulate cell death, (2) how these mechanisms relate to growth transformation and lymphomagenesis, and (3) how EBV genes cooperate to coordinately regulate key cell death pathways in BL and lymphoblastoid cell lines (LCLs)...
November 13, 2017: Viruses
https://www.readbyqxmd.com/read/29136714/-the-prognostic-significance-of-plasma-epstein-barr-virus-dna-in-patients-with-diffuse-large-b-cell-lymphoma
#6
N An, Y P Xie, Y Xu, P F Shi, S X Qian
To retrospectively analyze the prognostic significance of plasma Epstein-Barr virus (EBV) DNA in 122 patients with diffuse large B cell lymphoma (DLBCL). Plasma EBV DNA positivity was related to advanced disease stage (P=0.030), B symptoms (P=0.004) and elevated serum lactic dehydrogenase (LDH) (P=0.001). Furthermore, univariate analysis indicated that plasma EBV DNA level was associated with worse overall survival (OS) (HR=0.223, 95%CI 0.096-0.518, P<0.001) and worse progression free survival (PFS) (HR=4...
November 1, 2017: Zhonghua Nei Ke za Zhi [Chinese Journal of Internal Medicine]
https://www.readbyqxmd.com/read/29136066/unsuspected-lymphomatoid-granulomatosis-in-a-patient-with-antisynthetase-syndrome
#7
Stephanie L Skala, Alexandra C Hristov, Johann E Gudjonsson, May P Chan
Clinical diagnosis of lymphomatoid granulomatosis (LYG) often is difficult, especially in patients with multiple comorbidities. We present a 60-year-old woman with worsening fatigue, night sweats, unintentional weight loss, and dyspnea of 2 weeks' duration. Her medical history was remarkable for recent radiation therapy for recurrent breast cancer and antisynthetase syndrome complicated by interstitial lung disease and controlled with azathioprine. Computed tomography showed ground-glass opacities and nodular infiltrates in all lung lobes, raising concern for radiation pneumonitis and drug toxicity...
October 2017: Cutis; Cutaneous Medicine for the Practitioner
https://www.readbyqxmd.com/read/29132393/interferon-%C3%AE-inducible-protein-16-ifi16-is-required-for-the-maintenance-of-epstein-barr-virus-latency
#8
Gina Pisano, Arunava Roy, Mairaj Ahmed Ansari, Binod Kumar, Leela Chikoti, Bala Chandran
BACKGROUND: Epstein-Barr virus (EBV) exhibits both lytic and latent (Lat. I, II, and III) phases in an infected individual. It's during the latent phase of EBV that all EBV-associated cancers, including Burkitt's lymphoma, nasopharyngeal carcinoma and lymphoproliferative disease arise. Interferon-γ-inducible protein 16 (IFI16) is a well-established innate immune sensor and viral transcriptional regulator involved in response to invading DNA viruses. During latency, IFI16 remains in the nucleus, in part bound to the EBV genome; however, neither its role in EBV lytic cycle or latency has been established...
November 13, 2017: Virology Journal
https://www.readbyqxmd.com/read/29123514/assessment-of-the-combined-effect-of-epstein-barr-virus-and-plasmodium-falciparum-infections-on-endemic-burkitt-lymphoma-using-a-multiplex-serological-approach
#9
Ruth Aguilar, Delphine Casabonne, Cristina O'Callaghan-Gordo, Marta Vidal, Joseph J Campo, Nora Mutalima, Evelina Angov, Sheetij Dutta, Deepak Gaur, Chetan E Chitnis, Virander Chauhan, Angelika Michel, Silvia de Sanjosé, Tim Waterboer, Manolis Kogevinas, Rob Newton, Carlota Dobaño
Epstein-Barr virus (EBV) is a necessary cause of endemic Burkitt lymphoma (eBL), while the role of Plasmodium falciparum in eBL remains uncertain. This study aimed to generate new hypotheses on the interplay between both infections in the development of eBL by investigating the IgG and IgM profiles against several EBV and P. falciparum antigens. Serum samples collected in a childhood study in Malawi (2005-2006) from 442 HIV-seronegative children (271 eBL cases and 171 controls) between 1.4 and 15 years old were tested by quantitative suspension array technology against a newly developed multiplex panel combining 4 EBV antigens [Z Epstein-Barr replication activator protein (ZEBRA), early antigen-diffuse component (EA-D), EBV nuclear antigen 1, and viral capsid antigen p18 subunit (VCA-p18)] and 15 P...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29122821/metagenomic-deep-sequencing-of-aqueous-fluid-detects-intraocular-lymphomas
#10
John Gonzales, Thuy Doan, Jessica G Shantha, Michele Bloomer, Michael R Wilson, Joseph L DeRisi, Nisha Acharya
INTRODUCTION: Currently, the detection of pathogens or mutations associated with intraocular lymphomas heavily relies on prespecified, directed PCRs. With metagenomic deep sequencing (MDS), an unbiased high-throughput sequencing approach, all pathogens as well as all mutations present in the host's genome can be detected in the same small amount of ocular fluid. METHODS: In this cross-sectional case series, aqueous fluid samples from two patients were submitted to MDS to identify pathogens as well as common and rare cancer mutations...
November 9, 2017: British Journal of Ophthalmology
https://www.readbyqxmd.com/read/29119120/computer-aided-design-of-an-epitope-based-vaccine-against-epstein-barr-virus
#11
Julio Alonso-Padilla, Esther M Lafuente, Pedro A Reche
Epstein-Barr virus is a very common human virus that infects 90% of human adults. EBV replicates in epithelial and B cells and causes infectious mononucleosis. EBV infection is also linked to various cancers, including Burkitt's lymphoma and nasopharyngeal carcinomas, and autoimmune diseases such as multiple sclerosis. Currently, there are no effective drugs or vaccines to treat or prevent EBV infection. Herein, we applied a computer-aided strategy to design a prophylactic epitope vaccine ensemble from experimentally defined T and B cell epitopes...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/29119031/pediatric-pulmonary-epstein-barr-virus-positive-diffuse-large-b-cell-lymphoma-a-case-report-and-review-of-the-literature
#12
Eric X Wei, Roberto F Silva, James D Cotelingam, Rodney E Shackelford
Non-Hodgkin's lymphoma (NHL) is a common malignancy of childhood; however, a lung primary presentation is an uncommon finding, as is finding an association with the Epstein-Barr virus (EBV). We report the case of a 23-month-old female who developed EBV-associated diffuse large B-cell lymphoma (DLBCL) that was initially thought to be pneumonia. Extensive tissue necrosis, focal angioinvasion, and angiodestruction were observed. She was refractory to various therapy regimens, subsequently developed DLBCL in the central nervous system, and eventually expired...
2017: Case Reports in Pathology
https://www.readbyqxmd.com/read/29118124/c-myc-represses-transcription-of-the-epstein-barr-virus-latent-membrane-protein-1-early-after-primary-b-cell-infection
#13
Alexander M Price, Joshua E Messinger, Micah A Luftig
Recent evidence has shown that the EBV oncogene LMP1 is not expressed at high levels early after EBV-infection of primary B cells, despite its being essential for the long-term outgrowth of immortalized lymphoblastoid cell lines (LCLs). In this study, we found that expression of LMP1 increased fifty-fold between seven days post infection and the LCL state. Metabolic labeling of nascently transcribed mRNA indicated this was primarily a transcription-mediated event. EBNA2, the key viral transcription factor regulating LMP1, and CTCF, an important chromatin insulator, were recruited to the LMP1 locus similarly early and late after infection...
November 8, 2017: Journal of Virology
https://www.readbyqxmd.com/read/29112016/b-lymphoblastic-leukemia-lymphoma-with-burkitt-like-morphology-and-igh-myc-rearrangement-report-of-3-cases-in-adult-patients
#14
Yiting Li, Gunjan Gupta, Ari Molofsky, Yi Xie, Nader Shihabi, Jane McCormick, Elaine S Jaffe
Isolated MYC rearrangement without other recurrent genetic abnormalities is rare in B lymphoblastic leukemia/lymphoma (B-ALL/LBL), with most cases reported in pediatric patients. We report 3 adult cases with lymphoblasts showing a precursor B cell immunophenotype, and isolated MYC/IGH translocation. All 3 cases occurred in male patients with initial presentation of diffuse lymphadenopathy. Cases 1 and 2 had B-ALL with significantly increased lymphoblasts in peripheral blood and bone marrow. Case 3, a patient with human immunodeficiency virus infection, had the diagnosis of B-LBL made on a retroperitoneal lymph node biopsy and had no peripheral blood or bone marrow involvement...
November 3, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29112013/cancer-therapy-associated-lymphoproliferative-disorders-an-under-recognized-type-of-immunodeficiency-associated-lymphoproliferative-disorder
#15
Sergio Pina-Oviedo, Roberto N Miranda, L Jeffrey Medeiros
We describe the clinicopathologic features of 17 patients who had a hematologic malignancy of various types, were treated, and subsequently developed a lymphoproliferative disorder (LPD). There were 10 men and 7 women with a median age of 59 years (range, 36 to 83 y). The primary hematologic neoplasms included: 5 chronic lymphocytic leukemia/small lymphocytic lymphoma, 3 plasma cell myeloma, 2 acute monoblastic leukemia, and 1 case each of mixed-phenotype acute leukemia, chronic myeloid leukemia, splenic marginal zone lymphoma, follicular lymphoma, mantle cell lymphoma, T-cell prolymphocytic leukemia, and peripheral T-cell lymphoma...
November 3, 2017: American Journal of Surgical Pathology
https://www.readbyqxmd.com/read/29105119/lymphoproliferative-disorders-with-concurrent-hhv8-and-ebv-infection-beyond-primary-effusion-lymphoma-and-germinotropic-lymphoproliferative-disorder
#16
Wei Wang, Rashmi Kanagal-Shamanna, Jeffrey L Medeiros
AIMS: Lymphoproliferative disorders (LPD) characterized by human herpesvirus 8 (HHV8) and Epstein-Barr virus (EBV) infection are rare and two entities are included in the World and Health Organization classification: primary effusion lymphoma (PEL) and germinotropic LPD. These two entities have very different clinicopathological presentations and prognosis. Here we describe two cases of HHV8-positive, EBV-positive lymphoma with clinicopathological features that are not consistent with either PEL or germinotropic LPD...
November 3, 2017: Histopathology
https://www.readbyqxmd.com/read/29103018/single-nucleotide-polymorphism-rs2274084-of-gap-junction-protein-beta-2-gene-among-epstein-barr-virus-associated-tumors
#17
Hua Xiao, Wen Liu, Zhenzhen Zhao, Yan Zhang, Yingying Song, Bing Luo
BACKGROUND: Gap junction protein beta 2 gene (GJB2) encodes one of connexins- Connexin 26 (Cx26), which mainly expressed in epithelial cells. Cx26 is usually considered a channel to exchange information between cells, which plays a critical role in tumor cell proliferation. OBJECTIVE: We investigated GJB2 rs2274084 polymorphism in three types of tumors, including nasophoryngeal carcinoma (NPC), gastric cancer (GC) and lymphoma. METHODS: Proteinase K digestion and phenolchloroform purification and QIAamp DNA FFPE tissue kit was used for DNA extraction...
October 27, 2017: Cancer Biomarkers: Section A of Disease Markers
https://www.readbyqxmd.com/read/29097495/ebv-associated-primary-nodal-t-nk-cell-lymphoma-shows-distinct-molecular-signature-and-copy-number-changes
#18
Siok-Bian Ng, Tae-Hoon Chung, Seiichi Kato, Shigeo Nakamura, Emiko Takahashi, Young-Hyeh Ko, Joseph D Khoury, C Cameron Yin, Richie Soong, Anand D Jeyasekharan, Michal Marek Hoppe, Viknesvaran Selvarajan, Soo-Yong Tan, Soon-Thye Lim, Choon-Kiat Ong, Maarja-Liisa Nairismägi, Priyanka Maheshwari, Shoa-Nian Choo, Shuangyi Fan, Chi-Kuen Lee, Shih-Sung Chuang, Wee-Joo Chng
The molecular biology of primary nodal T- and NK-cell lymphoma and its relationsihp with extranodal NK/T-cell lymphoma, nasal type is poorly understood. In this study, we assessed the relationship between nodal and extranodal EBV-positive T/NK-cell lymphomas using gene expression profiling and copy number aberration analyses. We performed GEP and CNA analysis on 66 cases of EBV-associated T/NK-cell lymphoma from nodal and extranodal sites, and correlated the molecular signatures with clinicopathologic features...
November 2, 2017: Haematologica
https://www.readbyqxmd.com/read/29094407/a-retrospective-analysis-of-post-transplant-lymphoproliferative-disorder-following-liver-transplantation
#19
Feras Al Fararjeh, Shameem Mahmood, Phaedra Tachtatzis, Deborah Yallop, Stephen Devereux, Piers Patten, Kosh Agrawal, Abid Suddle, John O'Grady, Nigel Heaton, Robert Marcus, Shireen Kassam
OBJECTIVE: To evaluate response rates and survival in adults developing post-transplant lymphoproliferative disorder (PTLD) following liver transplantation METHODS: Patients were identified retrospectively and data collected through local liver and haematology electronic databases and pharmacy records. RESULTS: Forty-five patients were identified. The median age at first transplant and at development of PTLD was 48 and 54 years respectively, with the median time from transplant to PTLD diagnosis of 56 months...
November 1, 2017: European Journal of Haematology
https://www.readbyqxmd.com/read/29093097/analysis-of-epstein-barr-virus-genomes-and-expression-profiles-in-gastric-adenocarcinoma
#20
Ivan Borozan, Marc Zapatka, Lori Frappier, Vincent Ferretti
Epstein-Barr virus (EBV) is a causative agent of a variety of lymphomas, nasopharyngeal carcinoma (NPC) and ∼9% of gastric (GC) carcinomas. An important question is whether particular EBV variants are more oncogenic than others but conclusions are currently hampered by the lack of sequenced EBV genomes. Here we contribute to this question by mining whole genome sequences of 201 GCs to identify13 EBV-positive GCs, and assembling 13 new EBV genome sequences; almost doubling the number of available GC-derived EBV genome sequences and providing the first non-Asian EBV genome sequences from GC...
November 1, 2017: Journal of Virology
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