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EBV T cells

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https://www.readbyqxmd.com/read/28910895/-correlation-analysis-of-the-epstein-barr-virus-recruited-regulatory-t-cells-in-nasopharyngeal-carcinoma-of-immune-escape
#1
P Bi, J Wang, J Lu, X Liu, F Wang, Y F Luo, S D Peng, X P Li
Objective: To investigate the relation of Epstein-Barr virus (EBV)-induced immune escape to regulatory T cells(Treg) in nasopharyngeal carcinoma(NPC). Methods: We recruited 83 patients who were pathologically diagnozed as nasopharyngeal carcinoma and treated in Nanfang Hospital from January to September 2016. CD4(+) CD25(+) FOXP3(+) Treg in peripheral blood was examined by flow cytometry and the level of EBV DNA in the blood was detected by quantitative real-time polymerase chain reaction(qRT-PCR)in 83 patients and 51 healthy adults as control...
September 7, 2017: Zhonghua Er Bi Yan Hou Tou Jing Wai Ke za Zhi, Chinese Journal of Otorhinolaryngology Head and Neck Surgery
https://www.readbyqxmd.com/read/28894558/ebv-and-hhv-6-circulating-subtypes-in-people-living-with-hiv-in-burkina-faso-impact-on-cd4-t-cell-count-and-hiv-viral-load
#2
Lassina Traore, Ouéogo Nikiema, Abdoul Karim Ouattara, Tegwindé Rébéca Compaore, Serge Théophile Soubeiga, Birama Diarra, Dorcas Obiri-Yeboah, Pegdwendé Abel Sorgho, Florencia Wendkuuni Djigma, Cyrille Bisseye, Albert Théophane Yonli, Jacques Simpore
Epstein Barr Virus (EBV) and Human Herpes Virus 6 (HHV-6) are responsible for severe diseases, particularly in immunocompromised persons. There is limited data of the infection of these opportunistic viruses in Burkina Faso. The purpose of this study was to characterize EBV and HHV-6 subtypes and to assess their impact on CD4 T cell count, HIV-1 viral load and antiretroviral treatment in people living with HIV-1. The study population consisted of 238 HIV-positive patients with information on the CD4 T cell count, HIV-1 viral load and HAART...
2017: Mediterranean Journal of Hematology and Infectious Diseases
https://www.readbyqxmd.com/read/28893938/epstein-barr-virus-associated-lymphomas
#3
REVIEW
Claire Shannon-Lowe, Alan B Rickinson, Andrew I Bell
Epstein-Barr virus (EBV), originally discovered through its association with Burkitt lymphoma, is now aetiologically linked to a remarkably wide range of lymphoproliferative lesions and malignant lymphomas of B-, T- and NK-cell origin. Some occur as rare accidents of virus persistence in the B lymphoid system, while others arise as a result of viral entry into unnatural target cells. The early finding that EBV is a potent B-cell growth transforming agent hinted at a simple oncogenic mechanism by which this virus could promote lymphomagenesis...
October 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28883511/cytotoxic-response-against-epstein-barr-virus-coexists-with-diffuse-large-b-cell-lymphoma-tolerogenic-microenvironment-clinical-features-and-survival-impact
#4
Melina Cohen, Aldana G Vistarop, Fuad Huaman, Marina Narbaitz, Fernanda Metrebian, Elena De Matteo, María V Preciado, Paola A Chabay
Epstein-Barr Virus (EBV) is present in neoplastic cells of 15% of Asian and Latin-American diffuse large B-cell lymphoma (DLBCL) patients. Even though a tolerogenic microenvironment was recently described in DLBCL, little is known concerning immunomodulatory features induced by EBV. As suggested in Hodgkin lymphoma, EBV-specific cytotoxic T-cells are increased but showing immune exhaustion features. Hence, host immunity suppression may play a critical role in tumor progression. This study aimed to investigate, whether an association between tumor microenvironment features and EBV presence is taking place, and its clinical correlate...
September 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28877959/prognostic-role-of-tumour-associated-macrophages-and-regulatory-t-cells-in-ebv-positive-and-ebv-negative-nasopharyngeal-carcinoma
#5
Marc L Ooft, Jolique A van Ipenburg, Maxime E Sanders, Mariette Kranendonk, Ingrid Hofland, Remco de Bree, Senada Koljenović, Stefan M Willems
AIMS: Tumour-associated macrophages (TAMs) and regulatory T cells (Tregs) form a special niche supporting tumour progression, and both correlate with worse survival in head and neck cancers. However, the prognostic role of TAM and Tregs in nasopharyngeal carcinoma (NPC) is still unknown. Therefore, we determined differences in TAMs and Tregs in different NPC subtypes, and their prognostic significance. METHODS: Tissue of 91 NPCs was assessed for TAMs and Tregs by determination of CD68, CD163, CD206 and FOXP3 expression in the tumour microenvironment...
September 6, 2017: Journal of Clinical Pathology
https://www.readbyqxmd.com/read/28877678/extranodal-natural-killer-t-cell-lymphoma-in-malawi-a-report-of-three-cases
#6
Tamiwe Tomoka, Eric Powers, Toon van der Gronde, Amy Amuquandoh, Bal Mukunda Dhungel, Coxcilly Kampani, Steve Kamiza, Nathan D Montgomery, Yuri Fedoriw, Satish Gopal
BACKGROUND: Extranodal NK/T-cell lymphoma (ENKTCL) reports from sub-Saharan Africa (SSA) are remarkably rare, despite early childhood acquisition and high prevalence of the causative infectious agent, Epstein-Barr virus (EBV), and frequent occurrence of other lymphoproliferative disorders causally associated with EBV. CASE PRESENTATIONS: At a national teaching hospital in Malawi, three patients of African descent were seen with ENKTCL between 2013 and 2014. Patients were aged between 29 and 60 years, two with craniofacial involvement and one with a primary abdominal tumor, and all were HIV-negative...
September 6, 2017: BMC Cancer
https://www.readbyqxmd.com/read/28877074/gata3-immunohistochemical-staining-in-hodgkin-lymphoma-diagnostic-utility-in-differentiating-classic-hodgkin-lymphoma-from-nodular-lymphocyte-predominant-hodgkin-lymphoma-and-other-mimicking-entities
#7
Brie Kezlarian, Mohammad Alhyari, Girish Venkataraman, Kristin Karner, Kedar V Inamdar, Madhu P Menon
BACKGROUND: Classic Hodgkin lymphoma (CHL) and nodular lymphocyte predominant Hodgkin lymphoma (NLPHL) are clinically distinct entities, with different prognostic and treatment implications. In addition, several large B-cell lymphomas and some T-cell lymphomas can mimic CHL. Differentiating these entities from CHL is crucial for ensuring appropriate therapy. GATA3 is a T-cell transcription factor involved in T-cell maturation and has been previously shown to be overexpressed in CHL cells via gene expression profiling...
September 4, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28874193/extranodal-nasal-type-natural-killer-t-cell-lymphoma-with-penile-involvement-a-case-report-and-review-of-the-literature
#8
Xiaotian Wang, Zimu Gong, Shawn Xiang Li, Wei Yan, Yongsheng Song
BACKGROUND: Extranodal natural killer/T-cell lymphoma (ENKTL) usually presents as a localized disease in the nasal cavity; extension to the male genitourinary system is very rare and has been characterized only recently. Most cases present with predominantly extranodal involvement, advanced stage disease, highly aggressive course, and strong association with Epstein-Barr virus (EBV). While metastasis is common in ENKTLs, the penis is rarely involved in both nasal and non-nasal ENKTLs and only one report was published to date...
September 6, 2017: BMC Urology
https://www.readbyqxmd.com/read/28860939/infectious-mononucleosis-like-syndrome-with-high-lymphocytosis-and-positive-igm-ebv-and-cmv-antibodies-in-a-three-year-old-girl
#9
Joanna Alicja Krupka, Katarzyna Samelska, Anna Tomasik, Anna Stelmaszczyk-Emmel, Katarzyna Pawelec
Primary Epstein-Barr virus (EBV) and cytomegalovirus (CMV) infection usually affects preadolescent children or young adults, causing similar clinical presentation. Signs and symptoms are typically mild, and the majority of clinical and laboratory findings resolve spontaneously within one month after onset. In adulthood, the risk of fulminant EBV infection and severe complications is much higher, which may be related to increasing memory CD8+ T-cell population with age. It is still not clear what exactly triggers T-cell clonal proliferation...
2017: Central-European Journal of Immunology
https://www.readbyqxmd.com/read/28855662/tcr-like-antibodies-mediate-complement-and-antibody-dependent-cellular-cytotoxicity-against-epstein-barr-virus-transformed-b-lymphoblastoid-cells-expressing-different-hla-a-02-microvariants
#10
Junyun Lai, Joanna Ai Ling Choo, Wei Jian Tan, Chien Tei Too, Min Zin Oo, Manuel A Suter, Fatimah Bte Mustafa, Nalini Srinivasan, Conrad En Zuo Chan, Andrew Guo Xian Lim, Youjia Zhong, Soh Ha Chan, Brendon J Hanson, Nicholas R J Gascoigne, Paul A MacAry
Epstein-Barr virus (EBV) is a common gammaherpesvirus associated with various human malignancies. Antibodies with T cell receptor-like specificities (TCR-like mAbs) provide a means to target intracellular tumor- or virus-associated antigens by recognising their processed peptides presented on major histocompatibility complex (MHC) class I (pMHC) complexes. These antibodies are however thought to be relevant only for a single HLA allele. Here, we show that HLA-A*02:01-restricted EBV antigenic peptides EBNA1562-570, LMP1125-133 and LMP2A426-434 display binding degeneracy towards HLA-A*02 allelic microvariants, and that these pMHC complexes are recognised by anti-EBV TCR-like mAbs E1, L1 and L2 raised in the context of HLA-A*02:01...
August 30, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28845389/ebv-driven-natural-killer-cell-disease-of-the-central-nervous-system-presenting-as-subacute-cognitive-decline
#11
Francesca M Brett, Richard Flavin, Daphne Chen, Teresa Loftus, Seamus Looby, Allan McCarthy, Cillian de Gascun, Elaine S Jaffe, Nurul Nor, Mohsen Javadpour, Dominick McCabe
Brain biopsy in patients presenting with subacute encephalopathyis never straightforward and only undertaken when a 'treatable condition' is a realistic possibility. This 63 year old right handed, immunocompetent Caucasian woman presented with an 8 month history of rapidly progressive right-sided hearing impairment, a 4 month history of intermittent headaches, tinnitus, 'dizziness', dysphagia, nausea and vomiting, with the subsequent evolution of progressive gait ataxia and a subacute global encephalopathy...
November 2017: Human Pathology (New York)
https://www.readbyqxmd.com/read/28842185/early-diagnosis-of-pi3k%C3%AE-syndrome-in-a-2-years-old-girl-with-recurrent-otitis-and-enlarged-spleen
#12
F Saettini, M A Pelagatti, D Sala, D Moratto, S Giliani, R Badolato, A Biondi
Heterozygous gain of function mutations in the gene encoding p110δ subunit of PI3K have been recently associated with activated PI3K-δ syndrome (APDS), a novel combined immune deficiency characterized by recurrent sinopulmonary infections, lymphopenia, reduced class-switched memory B cells, lymphadenopathy, CMV and/or EBV viremia and EBV-related lymphoma. Here we report a dominant gain of function PIK3CD mutation (E1021K) in a patient presenting with recurrent otitis media, massive splenomegaly, and persistent EBV-viraemia...
August 31, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28838455/an-unusual-posttransplant-t-cell-lymphoma-after-liver-transplantation-a-case-report
#13
I E Obiorah, M Ozdemirli
Posttransplantation lymphoproliferative disorders (PTLDs) encompass a spectrum of heterogeneous entities ranging from benign lymphocytic proliferations to high-grade malignant lymphomas. The majority of PTLDs are associated with reactivation of Epstein-Barr virus (EBV), which induces B-cell proliferation and occurs in the setting of severe immune suppression after solid organ or bone marrow transplantation. T-cell/natural killer cell PTLDs are relatively rare, constituting ∼15% of all cases. T-cell PTLDs are usually aggressive, and outcomes are poor...
September 2017: Transplantation Proceedings
https://www.readbyqxmd.com/read/28838149/human-immunodeficiency-virus-type-1-persistence-following-systemic-chemotherapy-for-malignancy
#14
Timothy J Henrich, Kristen S Hobbs, Emily Hanhauser, Eileen Scully, Louise E Hogan, Yvonne P Robles, Kaitlyn S Leadabrand, Francisco M Marty, Christine D Palmer, Stephanie Jost, Christian Körner, Jonathan Z Li, Rajesh T Gandhi, Ayad Hamdan, Jeremy Abramson, Ann S LaCasce, Daniel R Kuritzkes
Background: Systemic chemotherapies for various malignancies have been shown to significantly, yet transiently, decrease numbers of CD4+ T lymphocytes, a major reservoir for human immunodeficiency virus type 1 (HIV-1) infection. However, little is known about the impact of cytoreductive chemotherapy on HIV-1 reservoir dynamics, persistence, and immune responses. Methods: We investigated the changes in peripheral CD4+ T-cell-associated HIV-1 DNA and RNA levels, lymphocyte activation, viral population structure, and virus-specific immune responses in a longitudinal cohort of 15 HIV-1-infected individuals receiving systemic chemotherapy or subsequent autologous stem cell transplantation for treatment of hematological malignancies and solid tumors...
July 15, 2017: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/28836703/anoikis-resistance-and-oncoviruses
#15
Ehsan Kakavandi, Ramin Shahbahrami, Hossein Goudarzi, Gita Eslami, Ebrahim Faghihloo
Anoikis is known as a special type of programmed cell death which occurs in response to loss of correct cell-extracellular matrix (ECM) connections. This process could be as pivotal event in normal development and tissue homeostasis and found as important mechanism in cancer invasiveness and metastasis. The persistent infection with oncoviruses including EBV (Epstein Bar virus), HPV (Human Papillomaviruses), HBV (Hepatitis B virus), KSHV (Human herpesvirus 8), HTLV-1 (Human T-lymphotropic virus-1), and HCV (Hepatitis C virus) accounted as one of main risk factor for cancer progression...
August 24, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28835490/asymptomatic-primary-infection-with-epstein-barr-virus-observations-on-young-adult-cases
#16
Rachel J Abbott, Annette Pachnio, Isabela Pedroza-Pacheco, Alison M Leese, Jusnara Begum, Heather M Long, Debbie Croom-Carter, Andrea Stacey, Paul A H Moss, Andrew D Hislop, Persephone Borrow, Alan B Rickinson, Andrew I Bell
Epstein-Barr virus (EBV) is typically acquired asymptomatically in childhood. By contrast, infection later in life often leads to infectious mononucleosis (IM), a febrile illness characterised by anti-EBV IgM antibody-positivity, high loads of circulating latently-infected B cells, and a marked lymphocytosis caused by hyper-expansion of EBV-specific CD8(+) T cells plus milder expansion of CD56(dim) NKG2A(+) KIR(-) NK cells. How the two situations compare is unclear due to the paucity of studies on clinically-silent infection...
August 23, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28831508/-who-classification-and-clinical-spectrum-of-cutaneous-lymphomas
#17
REVIEW
C Mitteldorf, S Grabbe, R Stadler
BACKGROUND: Cutaneous lymphomas are rare skin cancers with a wide clinical spectrum. OBJECTIVE: To give an overview of the current classification and the clinical spectrum of cutaneous lymphomas. MATERIAL AND METHODS: Analysis and summary of the current literature concerning the different entities of cutaneous lymphomas. RESULTS: A few modifications in the nomenclature of cutaneous lymphoma have been introduced in the revised version of the WHO classification 2016...
August 22, 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
https://www.readbyqxmd.com/read/28822832/combined-immunodeficiency-with-ebv-positive-b-cell-lymphoma-and-epidermodysplasia-verruciformis-due-to-a-novel-homozygous-mutation-in-rasgrp1
#18
Craig D Platt, Ari J Fried, Rodrigo Hoyos-Bachiloglu, G Naheed Usmani, Birgitta Schmidt, Jennifer Whangbo, Roberto Chiarle, Janet Chou, Raif S Geha
RASGRP1 is a guanine-nucleotide-exchange factor essential for MAP-kinase mediated signaling in lymphocytes. We report the second case of RASGRP1 deficiency in a patient with a homozygous nonsense mutation in the catalytic domain of the protein. The patient had epidermodysplasia verruciformis, suggesting a clinically important intrinsic T cell function defect. Like the previously described patient, our proband also presented with CD4(+) T cell lymphopenia, impaired T cell proliferation to mitogens and antigens, reduced NK cell function, and EBV-associated lymphoma...
August 16, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28800011/rna-in-situ-hybridization-for-epstein-barr-virus-and-cytomegalovirus-comparison-with-in-situ-hybridization-and-immunohistochemistry
#19
Catherine J Roe, Momin T Siddiqui, Diane Lawson, Cynthia Cohen
The RNAscope utilizes in situ hybridization (RISH) technology to detect single RNA molecules in a variety of tissue samples, including formalin fixed paraffin embedded (FFPE) tissues. Epstein-Barr virus (EBV) and cytomegalovirus (CMV) are found in association with neoplastic tissues and inflammatory lesions, and immunohistochemistry (IHC) or other techniques (ISH) are utilized to identify them. We compared the RNAscope RISH to ISH and IHC in the detection of EBV and CMV respectively to determine RNAscope utility in a clinical setting...
August 9, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
https://www.readbyqxmd.com/read/28800008/epstein-barr-virus-infection-can-be-a-secondary-event-in-b-cell-lymphomas-a-review-of-338-cases-and-a-novel-finding-of-zonal-eber-tumor-cells-showing-features-of-progression-from-underlying-ebv-negative-lymphoma
#20
Ira J Miller
Cases of B-cell lymphoma over an 8-year interval with diagnosis of EBER positivity were retrieved from archives and reviewed for classification and pattern of Epstein Barr Virus (EBV) expression. Of 46 cases that were EBV early RNA (EBER)+ by in situ hybridization staining, 7 had nonuniform staining among the neoplastic cells. Four of those cases showed a uniform admixture of EBER+ and EBER- tumor cells, compatible with the prevailing theory of episomal EBV loss with cell replication. Three cases of lymphomas showed a partial and zonal pattern and other features suggest that EBV infection occurred after the lymphoma was already established...
August 9, 2017: Applied Immunohistochemistry & Molecular Morphology: AIMM
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