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https://www.readbyqxmd.com/read/29034860/comparison-of-two-automated-instruments-for-epstein-barr-virus-serology-in-a-large-adult-hospital-and-implementation-of-an-epstein-barr-virus-nuclear-antigen-based-testing-algorithm
#1
Hilal Al Sidairi, Khalifa Binkhamis, Colleen Jackson, Catherine Roberts, Charles Heinstein, Jimmy MacDonald, Robert Needle, Todd F Hatchette, Jason J LeBlanc
Serology remains the mainstay for diagnosis of Epstein-Barr virus (EBV) infection. This study compared two automated platforms (BioPlex 2200 and Architect i2000SR) to test three EBV serological markers: viral capsid antigen (VCA) immunoglobulins of class M (IgM), VCA immunoglobulins of class G (IgG) and EBV nuclear antigen-1 (EBNA-1) IgG. Using sera from 65 patients at various stages of EBV disease, BioPlex demonstrated near-perfect agreement for all EBV markers compared to a consensus reference. The agreement for Architect was near-perfect for VCA IgG and EBNA-1 IgG, and substantial for VCA IgM despite five equivocal results...
October 16, 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28904201/heterogeneity-of-the-epstein-barr-virus-ebv-major-internal-repeat-reveals-evolutionary-mechanisms-of-ebv-and-a-functional-defect-in-the-prototype-ebv-strain-b95-8
#2
Mohammed M Ba Abdullah, Richard D Palermo, Anne L Palser, Nicholas E Grayson, Paul Kellam, Samantha Correia, Agnieszka Szymula, Robert E White
Epstein-Barr virus (EBV) is a ubiquitous pathogen of humans that can cause several types of lymphoma and carcinoma. Like other herpesviruses, EBV has diversified through both coevolution with its host and genetic exchange between virus strains. Sequence analysis of the EBV genome is unusually challenging because of the large number and lengths of repeat regions within the virus. Here we describe the sequence assembly and analysis of the large internal repeat 1 of EBV (IR1; also known as the BamW repeats) for more than 70 strains...
December 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28758827/lymphoproliferative-disorders-in-patients-with-rheumatoid-arthritis-in-the-era-of-widespread-use-of-methotrexate-a-review-of-the-literature-and-current-perspective
#3
Masayoshi Harigai
Lymphoproliferative disorders (LPD) in patients receiving methotrexate (MTX) have gained strong attention. In this article, I reviewed the basic and clinical findings of this issue. Patients with RA possess a high risk of lymphoma, but epidemiological evidence showing an association between the use of MTX and lymphoma is still limited. Rapid regression of LPD after stopping MTX in patients with RA strongly suggests that there is a causative relationship. Genetic predisposition, accumulated inflammation, impaired generation of Epstein-Barr virus (EBV)-specific cytotoxic T lymphocytes, effects of MTX on the regulation of EBV genes, and low hypermethylation of apoptosis-related genes are relevant to the development of LPD and rapid regression after cessation of MTX...
July 31, 2017: Modern Rheumatology
https://www.readbyqxmd.com/read/28617871/hypoxia-inducible-factor-1%C3%AE-plays-roles-in-epstein-barr-virus-s-natural-life-cycle-and-tumorigenesis-by-inducing-lytic-infection-through-direct-binding-to-the-immediate-early-bzlf1-gene-promoter
#4
Richard J Kraus, Xianming Yu, Blue-Leaf A Cordes, Saraniya Sathiamoorthi, Tawin Iempridee, Dhananjay M Nawandar, Shidong Ma, James C Romero-Masters, Kyle G McChesney, Zhen Lin, Kathleen R Makielski, Denis L Lee, Paul F Lambert, Eric C Johannsen, Shannon C Kenney, Janet E Mertz
When confronted with poor oxygenation, cells adapt by activating survival signaling pathways, including the oxygen-sensitive transcriptional regulators called hypoxia-inducible factor alphas (HIF-αs). We report here that HIF-1α also regulates the life cycle of Epstein-Barr virus (EBV). Incubation of EBV-positive gastric carcinoma AGS-Akata and SNU-719 and Burkitt lymphoma Sal and KemIII cell lines with a prolyl hydroxylase inhibitor, L-mimosine or deferoxamine, or the NEDDylation inhibitor MLN4924 promoted rapid and sustained accumulation of both HIF-1α and lytic EBV antigens...
June 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28395107/ebv-positive-b-cell-proliferations-of-varied-malignant-potential-2015-sh-eahp-workshop-report-part-1
#5
Yasodha Natkunam, John R Goodlad, Amy Chadburn, Daphne de Jong, Dita Gratzinger, John K C Chan, Jonathan Said, Elaine S Jaffe
Objectives: The 2015 Workshop of the Society for Hematopathology/European Association for Haematopathology aimed to review B-cell proliferations of varied malignant potential associated with immunodeficiency. Methods: The Workshop Panel reviewed all cases of B-cell hyperplasias, polymorphic B-lymphoproliferative disorders, Epstein-Barr virus (EBV)-positive mucocutaneous ulcer, and large B-cell proliferations associated with chronic inflammation and rendered consensus diagnoses...
February 1, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28395105/t-and-nk-cell-lymphomas-and-systemic-lymphoproliferative-disorders-and-the-immunodeficiency-setting-2015-sh-eahp-workshop-report-part-4
#6
Dita Gratzinger, Daphne de Jong, Elaine S Jaffe, Amy Chadburn, John K C Chan, John R Goodlad, Jonathan Said, Yasodha Natkunam
Objectives: The 2015 Workshop of the Society for Hematopathology/European Association for Haematopathology aimed to review immunodeficiency-related T- and natural killer (NK)-cell lymphoproliferations. Methods: The Workshop Panel reviewed 88 T- or NK-cell lymphoproliferations and rendered consensus diagnoses. Results: Hyperplasias of T-cell subsets may be clonal; retained architecture and the clinical setting support a benign diagnosis. Specific associations include hepatosplenic T-cell lymphoma with iatrogenic immunosuppression and breast implants with an indolent variant of anaplastic large cell lymphoma...
February 1, 2017: American Journal of Clinical Pathology
https://www.readbyqxmd.com/read/27818362/impact-of-infectious-disease-epidemics-on-tuberculosis-diagnostic-management-and-prevention-services-experiences-and-lessons-from-the-2014-2015-ebola-virus-disease-outbreak-in-west-africa
#7
Rashid Ansumana, Samuel Keitell, Gregory M T Roberts, Francine Ntoumi, Eskild Petersen, Giuseppe Ippolito, Alimuddin Zumla
The World Health Organization (WHO) Global Tuberculosis Report 2015 states that 28% of the world's 9.6 million new tuberculosis (TB) cases are in the WHO Africa Region. The Mano River Union (MRU) countries of West Africa-Guinea, Sierra Leone, and Liberia-have made incremental sustained investments into TB control programmes over the past two decades. The devastating Ebola virus disease (EVD) outbreak of 2014-2015 in West Africa impacted significantly on all sectors of the healthcare systems in the MRU countries, including the TB prevention and control programmes...
March 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/27758822/mediastinal-gray-zone-lymphoma-clinico-pathological-characteristics-and-outcomes-of-99-patients-from-the-lymphoma-study-association
#8
Clémentine Sarkozy, Thierry Molina, Hervé Ghesquières, Anne-Sophie Michallet, Jehan Dupuis, Diane Damotte, Franck Morsschauser, Marie Parrens, Laurent Martin, Peggy Dartigues, Aspasia Stamatoullas, Pierre Hirsch, Bettina Fabiani, Krimo Bouabdallah, Maria Gomes da Silva, Marie Maerevoet, Camille Laurent, Bertrand Coiffier, Gilles Salles, Alexandra Traverse-Glehen
Mediastinal gray zone lymphoma, B-cell lymphomas with intermediate features between classical Hodgkin lymphoma and primary mediastinal B-cell lymphoma, have not been well described in the literature. We report the clinical characteristics and outcomes of a large retrospective series of 99 cases centrally reviewed by a panel of hematopathologists, with a consensus established for the diagnosis. Cases were defined as classical Hodgkin lymphoma-like morphology (64.6%) with primary mediastinal B-cell lymphoma immunophenotype, primary mediastinal B-cell lymphoma-like morphology (30...
January 2017: Haematologica
https://www.readbyqxmd.com/read/27467016/nation-wide-measure-of-variability-in-hcmv-ebv-and-bkv-dna-quantification-among-centers-involved-in-monitoring-transplanted-patients
#9
Isabella Abbate, Antonio Piralla, Agata Calvario, Annapaola Callegaro, Cristina Giraldi, Giovanna Lunghi, William Gennari, Giuseppe Sodano, Paolo Ravanini, Pier Giulio Conaldi, Marialinda Vatteroni, Aurelia Gaeta, Pierpaolo Paba, Rossana Cavallo, Fausto Baldanti, Tiziana Lazzarotto
BACKGROUND: Inter-laboratory variability in quantifying pathogens involved in viral disease following transplantation may have a great impact on patient care, especially when pre-emptive strategies are used for prevention. OBJECTIVES: The aim of this study was to analyze the variability in quantifying CMV, EBV and BKV DNA from 15 virology laboratories of the Italian Infections in Transplant Working Group (GLaIT) involved in monitoring transplanted patients. STUDY DESIGN: Panels from international Quality Control programs for Molecular Diagnostics (QCMD, year 2012), specific for the detection of CMV in plasma, CMV in whole blood (WB), EBV and BKV were used...
September 2016: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/27375590/herpesvirus-late-gene-expression-a-viral-specific-pre-initiation-complex-is-key
#10
REVIEW
Henri Gruffat, Roberta Marchione, Evelyne Manet
During their productive cycle, herpesviruses exhibit a strictly regulated temporal cascade of gene expression that can be divided into three general stages: immediate-early (IE), early (E), and late (L). This expression program is the result of a complex interplay between viral and cellular factors at both the transcriptional and post-transcriptional levels, as well as structural differences within the promoter architecture for each of the three gene classes. Since the cellular enzyme RNA polymerase II (RNAP-II) is responsible for the transcription of herpesvirus genes, most viral promoters contain DNA motifs that are common with those of cellular genes, although promoter complexity decreases from immediate-early to late genes...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27345450/-new-molecular-classification-of-colorectal-cancer-pancreatic-cancer-and-stomach-cancer-towards-%C3%A3-la-carte-treatment
#11
REVIEW
Chantal Dreyer, Pauline Afchain, Isabelle Trouilloud, Thierry André
This review reports 3 of recently published molecular classifications of the 3 main gastro-intestinal cancers: gastric, pancreatic and colorectal adenocarcinoma. In colorectal adenocarcinoma, 6 independent classifications were combined to finally hold 4 molecular sub-groups, Consensus Molecular Subtypes (CMS 1-4), linked to various clinical, molecular and survival data. CMS1 (14% MSI with immune activation); CMS2 (37%: canonical with epithelial differentiation and activation of the WNT/MYC pathway); CMS3 (13% metabolic with epithelial differentiation and RAS mutation); CMS4 (23%: mesenchymal with activation of TGFβ pathway and angiogenesis with stromal invasion)...
July 2016: Bulletin du Cancer
https://www.readbyqxmd.com/read/27260610/post-transplant-lymphoproliferative-disorder-of-the-pediatric-airway-presentation-and-management
#12
REVIEW
Allison F O'Neill, Eelam A Adil, Alexandria L Irace, Laura Neff, Ian J Davis, Antonio R Perez-Atayde, Stephan D Voss, Olga Weinberg, Reza Rahbar
OBJECTIVE: Post-transplant lymphoproliferative disorder (PTLD) is a rare complication of immunosuppression with little consensus on its evaluation and management. The purpose of this contemporary review is to describe a pediatric patient with PTLD of the airway and review the literature to provide multidisciplinary recommendations regarding management. DATA SOURCES: Retrospective chart and literature review. REVIEW METHODS: A pediatric patient with PTLD of the airway is described...
July 2016: International Journal of Pediatric Otorhinolaryngology
https://www.readbyqxmd.com/read/27157146/epstein-barr-virus-load-in-transplant-patients-early-detection-of-post-transplant-lymphoproliferative-disorders
#13
María Dolores Fellner, Karina A Durand, Veronica Solernou, Andrea Bosaleh, Ziomara Balbarrey, María T García de Dávila, Marcelo Rodríguez, Lucía Irazu, Lidia V Alonio, María A Picconi
High levels of circulating EBV load are used as a marker of post-transplant lymphoproliferative disorders (PTLD). There is no consensus regarding the threshold level indicative of an increase in peripheral EBV DNA. The aim of the study was to clinically validate a developed EBV quantification assay for early PTLD detection. Transversal study: paired peripheral blood mononuclear cells (PBMC), plasma and oropharyngeal lymphoid tissue (OLT) from children undergoing a solid organ transplant with (n=58) and without (n=47) PTLD...
April 2016: Revista Argentina de Microbiología
https://www.readbyqxmd.com/read/27061054/the-bdlf3-gene-product-of-epstein-barr-virus-gp150-mediates-non-productive-binding-to-heparan-sulfate-on-epithelial-cells-and-only-the-binding-domain-of-cd21-is-required-for-infection
#14
Liudmila S Chesnokova, Sarah M Valencia, Lindsey M Hutt-Fletcher
The cell surface molecules used by Epstein-Barr virus (EBV) to attach to epithelial cells are not well-defined, although when CD21, the B cell receptor for EBV is expressed epithelial cell infection increases disproportionately to the increase in virus bound. Many herpesviruses use low affinity charge interactions with molecules such as heparan sulfate to attach to cells. We report here that the EBV glycoprotein gp150 binds to heparan sulfate proteoglycans, but that attachment via this glycoprotein is not productive of infection...
July 2016: Virology
https://www.readbyqxmd.com/read/27009860/erk2-phosphorylation-of-ebna1-serine-383-residue-is-important-for-ebna1-dependent-transactivation
#15
Ka-Won Noh, Jihyun Park, Eun Hye Joo, Eun Kyung Lee, Eun Young Choi, Myung-Soo Kang
Functional inhibition of Epstein-Barr virus (EBV)-encoded nuclear antigen 1 (EBNA1) can cause the death of EBV infected cells. In this study, a bioinformatics tool predicted the existence of putative extracellular signal-regulated kinase (ERK) docking and substrate consensus sites on EBNA1, suggesting that ERK2 could bind to and phosphorylate EBNA1. In accordance, ERK2 was found to phosphorylate EBNA1 serine 383 in a reaction suppressed by H20 (a structural congener of the ERK inhibitor), U0126 (an inhibitor of MEK kinase), and mutations at substrate (S383A) or putative ERK docking sites...
May 3, 2016: Oncotarget
https://www.readbyqxmd.com/read/26939891/b-and-t-cell-epitope-based-peptides-predicted-from-evolutionarily-conserved-and-whole-protein-sequences-of-ebola-virus-as-vaccine-targets
#16
T Yasmin, A H M Nurun Nabi
Ebola virus (EBV) has become a serious threat to public health. Different approaches were applied to predict continuous and discontinuous B cell epitopes as well as T cell epitopes from the sequence-based and available three-dimensional structural analyses of each protein of EBV. Peptides '(79) VPSATKRWGFRSGVPP(94) ' from GP1 and '(515) LHYWTTQDEGAAIGLA(530) ' from GP2 of Ebola were found to be the consensus peptidic sequences predicted as linear B cell epitope of which the latter contains a region (519) TTQDEG(524) that fulfilled all the criteria of accessibility, hydrophilicity, flexibility and beta turn region for becoming an ideal B cell epitope...
May 2016: Scandinavian Journal of Immunology
https://www.readbyqxmd.com/read/26468528/identification-of-mef2b-ebf1-and-il6r-as-direct-gene-targets-of-epstein-barr-virus-ebv-nuclear-antigen-1-critical-for-ebv-infected-b-lymphocyte-survival
#17
Italo Tempera, Alessandra De Leo, Andrew V Kossenkov, Matteo Cesaroni, Hui Song, Noor Dawany, Louise Showe, Fang Lu, Priyankara Wikramasinghe, Paul M Lieberman
UNLABELLED: Epstein-Barr virus (EBV) nuclear antigen 1 (EBNA1) is the EBV-encoded nuclear antigen and sequence-specific DNA binding protein required for viral origin binding and episome maintenance during latency. EBNA1 can also bind to numerous sites in the cellular genome and can provide a host cell survival function, but it is not yet known how EBNA1 sequence-specific binding is responsible for host cell survival. Here, we integrate EBNA1 chromatin immunoprecipitation sequencing (ChIP-Seq) with transcriptome sequencing (RNA-Seq) after EBNA1 depletion to identify cellular genes directly regulated by EBNA1 that are also essential for B-cell survival...
October 14, 2015: Journal of Virology
https://www.readbyqxmd.com/read/26380657/molecular-classification-and-prediction-in-gastric-cancer
#18
REVIEW
Xiandong Lin, Yongzhong Zhao, Won-Min Song, Bin Zhang
Gastric cancer, a highly heterogeneous disease, is the second leading cause of cancer death and the fourth most common cancer globally, with East Asia accounting for more than half of cases annually. Alongside TNM staging, gastric cancer clinic has two well-recognized classification systems, the Lauren classification that subdivides gastric adenocarcinoma into intestinal and diffuse types and the alternative World Health Organization system that divides gastric cancer into papillary, tubular, mucinous (colloid), and poorly cohesive carcinomas...
2015: Computational and Structural Biotechnology Journal
https://www.readbyqxmd.com/read/26107949/whole-exome-sequencing-reveals-novel-phex-splice-site-mutations-in-patients-with-hypophosphatemic-rickets
#19
Sara L Ma, Virginia Vega-Warner, Christopher Gillies, Matthew G Sampson, Vijay Kher, Sidharth K Sethi, Edgar A Otto
OBJECTIVE: Hypophosphatemic rickets (HR) is a heterogeneous genetic phosphate wasting disorder. The disease is most commonly caused by mutations in the PHEX gene located on the X-chromosome or by mutations in CLCN5, DMP1, ENPP1, FGF23, and SLC34A3. The aims of this study were to perform molecular diagnostics for four patients with HR of Indian origin (two independent families) and to describe their clinical features. METHODS: We performed whole exome sequencing (WES) for the affected mother of two boys who also displayed the typical features of HR, including bone malformations and phosphate wasting...
2015: PloS One
https://www.readbyqxmd.com/read/25796382/imaging-findings-in-children-with-proliferative-disorders-following-multivisceral-transplantation
#20
Anastasia L Hryhorczuk, Heung Bae Kim, Marian H Harris, Sara O Vargas, David Zurakowski, Edward Y Lee
BACKGROUND: Multivisceral transplantation represents an important treatment option for children with intestinal failure. The attendant immunosuppression can lead to a spectrum of cellular proliferations including benign and malignant smooth muscle tumors and lymphoproliferative disorders, many related to cellular dysregulation from Epstein-Barr virus infection. OBJECTIVE: The purpose of this study is to investigate the rates of post-transplantation proliferative disorders among children with multivisceral transplantation and to characterize the imaging and pathological features of these disorders...
July 2015: Pediatric Radiology
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