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https://www.readbyqxmd.com/read/29156319/large-scale-analysis-of-herpesviridae-in-epilepsy-patients-with-signs-of-autoimmune-encephalitis
#1
Freya Poulheim, Laura Esposito, Christian E Elger, Anna M Eis-Hübinger, Albert J Becker, Pitt Niehusmann
PURPOSE: Epilepsy is one of the most common primary brain disorders. Nonparaneoplastic autoimmune encephalitis is increasingly recognized as an important cause of adult onset epilepsy. However, only in rare cases an initiating factor of the syndrome can be identified. Autoantibody detection after central nervous herpesvirus infection indicates a postviral etiology in a subgroup of patients. In order to analyze a possible underrecognition of postinfectious autoimmunity we performed a large-scale analysis of herpesvirus DNA in cerebrospinal fluid samples from patients with clinical signs of autoimmune encephalitis...
November 17, 2017: Seizure: the Journal of the British Epilepsy Association
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/29144413/epstein-barr-virus-hijacks-dna-damage-response-transducers-to-orchestrate-its-life-cycle
#3
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/29142476/clinical-and-pathological-characterization-of-epstein-barr-virus-associated-gastric-carcinomas-in-portugal
#4
Joana Ribeiro, Andreia Oliveira, Mariana Malta, Claudia Oliveira, Fernanda Silva, Ana Galaghar, Luís Pedro Afonso, Maria Cassiano Neves, Rui Medeiros, Pedro Pimentel-Nunes, Hugo Sousa
AIM: To determine the prevalence of Epstein-Barr virus (EBV)-associated gastric carcinomas in the North Region of Portugal and to study its clinicopathological characteristics. METHODS: We have performed a retrospective study including a total of 179 consecutive patients with gastric cancer (GC) submitted to gastrectomy during 2011 at the Portuguese Oncology Institute of Porto. Clinical and pathological data was collected from individual clinical records and inserted on a database with unique codification...
October 28, 2017: World Journal of Gastroenterology: WJG
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/29134204/latent-membrane-protein-1-is-a-novel-determinant-of-epstein-barr-virus-genome-persistence-and-reactivation
#6
Elizabeth A Caves, Rachel M Butch, Sarah A Cook, Laura R Wasil, Chen Chen, Yuanpu Peter Di, Nara Lee, Kathy H Y Shair
Epstein-Barr virus (EBV) is a ubiquitous gammaherpesvirus that persistently infects humans, with nearly 95% seropositivity in adults. Infection in differentiating epithelia is permissive, but EBV-associated nasopharyngeal carcinoma (NPC) tumors harbor a clonal and nonproductive latent infection. However, in explanted NPC cultures and epithelial cell lines, episomal EBV genomes are frequently lost. The resulting unstable infection has hampered efforts to study the determinants of EBV persistence and latency in epithelial oncogenesis...
November 2017: MSphere
https://www.readbyqxmd.com/read/29132393/interferon-%C3%AE-inducible-protein-16-ifi16-is-required-for-the-maintenance-of-epstein-barr-virus-latency
#7
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/29128025/posttransplant-lymphoproliferative-disorder-in-solid-organ-and-hematopoietic-stem-cell-transplantation
#8
REVIEW
Sarah J Nagle, Ran Reshef, Donald E Tsai
Posttransplant lymphoproliferative disorders (PTLD) represent an immunosuppression-related lymphoid or plasmacytic proliferation that occur in the setting of solid organ transplant or allogeneic hematopoietic stem cell transplantation (HSCT). PTLD is a devastating consequence of HSCT and solid organ transplantation with a high morbidity and mortality. Most commonly, PTLD is related to Epstein-Barr virus (EBV) infection, but an increasing number of non-EBV-related cases are occurring. Initial therapy involves withdrawal of immunosuppression with or without antibody or cytotoxic chemotherapy...
December 2017: Clinics in Chest Medicine
https://www.readbyqxmd.com/read/29127522/common-genetic-variation-within-mir-146a-predicts-disease-onset-and-relapse-in-multiple-sclerosis
#9
Yuan Zhou, Ming Chen, Steve Simpson, Robyn M Lucas, Jac C Charlesworth, Nicholas Blackburn, Ingrid van der Mei, Anne-Louise Ponsonby, Bruce V Taylor
Despite extensive studies focusing on the changes in expression of microRNAs (miRNAs) in multiple sclerosis (MS) compared to healthy controls, few studies have evaluated the association of genetic variants of miRNAs with MS clinical course. We investigated whether a functional polymorphism in the MS associated miR-146a gene predicted clinical course (hazard of conversion to MS and of relapse, and annualized change in disability), using a longitudinal cohort study of persons with a first demyelinating event followed up to their 5-year review...
November 10, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/29126141/gastric-carcinomas-with-lymphoid-stroma-categorization-and-comparison-with-solid-type-colonic-carcinomas
#10
Raul S Gonzalez, Justin M M Cates, Frank Revetta, Loralee A McMahon, Kay Washington
Objectives: To determine whether histologic features could help identify gastric carcinomas with lymphoid stroma associated with microsatellite instability (MSI) (ie, "medullary carcinomas"), Epstein-Barr virus (EBV) infection (termed lymphoepithelioma-like carcinomas in other organ systems), or neither. Methods: We identified 17 solid-type gastric carcinomas with lymphoid stroma, assessed EBV and MSI status, and compared features across groups. We also compared them with 51 solid-type colorectal adenocarcinomas...
November 8, 2017: American Journal of Clinical Pathology
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
#11
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/29120577/epstein-barr-virus-infection-in-multiple-sclerosis-patients
#12
Awatef M Awwad, Nesrine F Hanafi, Ghada A Achmawi, Amira M Naguib
Multiple sclerosis (MS) is the most common inflammatory autoimmune CNS disease, with unknown etiology. We aimed to determine the coexistence of MS with antibodies to Epstein-Barr virus and its gene sequences (EBNA1 and BHRF1). The study included 60 MS patients and 60 control subjects. Serum samples were processed by ELISA for detection of EBV antibodies, and latent EBV genes were determined by Real Time PCR in blood samples. While 18 (30%) MS cases had anti- EBV IgM antibodies, all controls were free. For IgG, no difference was noted (cases 96...
January 2017: Egyptian Journal of Immunology
https://www.readbyqxmd.com/read/29119120/computer-aided-design-of-an-epitope-based-vaccine-against-epstein-barr-virus
#13
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/29118124/c-myc-represses-transcription-of-the-epstein-barr-virus-latent-membrane-protein-1-early-after-primary-b-cell-infection
#14
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/29116594/elevated-expression-of-ebv-and-tlrs-in-the-brain-is-associated-with-rasmussen-s-encephalitis
#15
Xin Wang, Yisong Wang, Dong Liu, Peigang Wang, Dongying Fan, Yuguang Guan, Tianfu Li, Guoming Luan, Jing An
Rasmussen's encephalitis (RE) is a rare pediatric neurological disorder, the etiology of which remains unclear. It has been speculated that the immunopathogenesis of RE involves damage to neurons, which eventually leads to the occurrence of RE. Viral infection may be a critical factor in triggering RE immunopathogenesis. In this study, we analyzed the expression of Epstein-Barr virus (EBV) antigens as well as of Toll-like receptor 3 (TLR3), TLR9, and downstream adapter TIRdomain-containing adapter-inducing interferon-β (TRIF) in the brain tissues of 26 patients with RE and 16 control individuals using immunohistochemistry (IHC)...
October 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29116588/the-regulatory-role-of-protein-phosphorylation-in-human-gammaherpesvirus-associated-cancers
#16
REVIEW
Yuyan Wang, Shuvomoy Banerjee, Ling Ding, Cankun Cai, Fang Wei, Qiliang Cai
Activation of specific sets of protein kinases by intracellular signal molecules has become more and more apparent in the past decade. Phosphorylation, one of key posttranslational modification events, is activated by kinase or regulatory protein and is vital for controlling many physiological functions of eukaryotic cells such as cell proliferation, differentiation, malignant transformation, and signal transduction mediated by external stimuli. Moreovers, the reversible modification of phosphorylation and dephosphorylation can result in different features of the target substrate molecules including DNA binding, protein-protein interaction, subcellular location and enzymatic activity, and is often hijacked by viral infection...
October 2017: Virologica Sinica
https://www.readbyqxmd.com/read/29115077/identification-of-epstein-barr-virus-in-the-human-placenta-and-its-pathologic-characteristics
#17
Younghoon Kim, Hye Sung Kim, Joong Shin Park, Chong Jai Kim, Woo Ho Kim
Epstein-Barr virus (EBV), a common pathogen in humans, is suspected as the cause of multiple pregnancy-related pathologies including depression, preeclampsia, and stillbirth. Moreover, transmission of EBV through the placenta has been reported. However, the focus of EBV infection within the placenta has remained unknown to date. In this study, we proved the expression of latent EBV genes in the endometrial glandular epithelial cells of the placenta and investigated the cytological characteristics of these cells...
December 2017: Journal of Korean Medical Science
https://www.readbyqxmd.com/read/29112074/toll-like-receptor-tlr-9-polymorphism-is-associated-with-increased-epstein-barr-virus-and-cytomegalovirus-acquisition-in-hiv-exposed-infants
#18
Kristin Beima-Sofie, Dalton Wamalwa, Elizabeth Maleche-Obimbo, Jairam R Lingappa, Romel Mackelprang, Soren Gantt, Grace John-Stewart, Corey Casper, Jennifer A Slyker
Polymorphisms in the Toll-Like Receptor (TLR9) 1635 locus have been associated with HIV-1 acquisition and progression. Cytomegalovirus (CMV) and Epstein-Barr virus (EBV) acquisition were compared between Kenyan HIV-exposed infants by 1635 genotype. Having 1 or more copies of the 1635A allele was associated with increased CMV acquisition in HIV-infected infants (42% vs 11%, p = 0.03) and increased risk of EBV acquisition in HIV-exposed uninfected infants (HR = 4.2, p = 0.02) compared to 1635GG. Additionally, 1635A was associated with 0...
November 2, 2017: AIDS
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
#19
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
#20
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
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