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EBV T cells

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https://www.readbyqxmd.com/read/28635624/effects-of-type-1-diabetes-risk-alleles-on-immune-cell-gene-expression
#1
REVIEW
Ramesh Ram, Grant Morahan
Genetic studies have identified 61 variants associated with the risk of developing Type 1 Diabetes (T1D). The functions of most of the non-HLA (Human Leukocyte Antigen) genetic variants remain unknown. We found that only 16 of these risk variants could potentially be linked to a protein-coding change. Therefore, we investigated whether these variants affected susceptibility by regulating changes in gene expression. To do so, we examined whole transcriptome profiles of 600 samples from the Type 1 Diabetes Genetics Consortium (T1DGC)...
June 21, 2017: Genes
https://www.readbyqxmd.com/read/28628043/immunotherapy-for-transplantation-associated-viral-infections
#2
Claire Roddie, Karl S Peggs
Cytomegalovirus (CMV) and Epstein-Barr virus (EBV) infections following allogeneic hematopoietic stem cell transplantation (HSCT) are a major cause of morbidity and mortality. Early clinical trials demonstrate that adoptive transfer of donor-derived virus-specific T cells to restore virus-specific immunity is an effective strategy to control CMV and EBV infection after HSCT, conferring protection in 70%-90% of patients. The field has evolved rapidly to develop solutions to some of the manufacturing challenges identified in early clinical studies, such as prolonged in vitro culture, optimization of the purity of the virus-specific T cell product, the potential limitations of targeting a single viral antigen, and how to manage the patient with a virus-naive donor...
June 19, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28624961/phenotypic-and-functional-characterization-of-t-cells-in-white-matter-lesions-of-multiple-sclerosis-patients
#3
Gijsbert P van Nierop, Marvin M van Luijn, Samira S Michels, Marie-Jose Melief, Malou Janssen, Anton W Langerak, Werner J D Ouwendijk, Rogier Q Hintzen, Georges M G M Verjans
T cells are considered pivotal in the pathology of multiple sclerosis (MS), but their function and antigen specificity are unknown. To unravel the role of T cells in MS pathology, we performed a comprehensive analysis on T cells recovered from paired blood, cerebrospinal fluid (CSF), normal-appearing white matter (NAWM) and white matter lesions (WML) from 27 MS patients with advanced disease shortly after death. The differentiation status of T cells in these compartments was determined by ex vivo flow cytometry and immunohistochemistry...
June 17, 2017: Acta Neuropathologica
https://www.readbyqxmd.com/read/28623913/aggressive-natural-killer-cell-leukemia-or-extranodal-nk-t-cell-lymphoma-a-case-with-nasal-involvement
#4
Xiaoke Jin, Youhai Xu, Jun Zhang, Guangxi Li, Dongping Huang, Yuqiong Yang, Hesheng He
BACKGROUND: Aggressive natural killer cell leukemia/lymphoma (ANKL) is a rare and highly aggressive NK cell neoplasm with a short clinical course and poor prognosis and is often misdiagnosed and confused with NK/T cell lymphoma (NKTL), which has a very different prognosis. Here, we present a case with nasal and bone marrow involvement, provide a literature review and make a differential diagnosis. CASE PRESENTATION: A 41-year-old male presented nasal congestion pharyngalgia, palatal perforation, high fever and multiorgan dysfunction...
June 17, 2017: Diagnostic Pathology
https://www.readbyqxmd.com/read/28620346/primary-progressive-multiple-sclerosis-putting-together-the-puzzle
#5
REVIEW
Ahmed Abdelhak, Martin S Weber, Hayrettin Tumani
The focus of multiple sclerosis research has recently turned to the relatively rare and clearly more challenging condition of primary progressive multiple sclerosis (PPMS). Many risk factors such as genetic susceptibility, age, and Epstein-Barr virus (EBV) infection may interdepend on various levels, causing a complex pathophysiological cascade. Variable pathological mechanisms drive disease progression, including inflammation-associated axonal loss, continuous activation of central nervous system resident cells, such as astrocytes and microglia as well as mitochondrial dysfunction and iron accumulation...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28612032/genetics-and-molecular-biology-of-epstein-barr-virus-encoded-bart-microrna-a-paradigm-for-viral-modulation-of-host-immune-response-genes-and-genome-stability
#6
REVIEW
David H Dreyfus
Epstein-Barr virus, a ubiquitous human herpesvirus, is associated through epidemiologic evidence with common autoimmune syndromes and cancers. However, specific genetic mechanisms of pathogenesis have been difficult to identify. In this review, the author summarizes evidence that recently discovered noncoding RNAs termed microRNA encoded by Epstein-Barr virus BARF (BamHI A right frame) termed BART (BamHI A right transcripts) are modulators of human immune response genes and genome stability in infected and bystander cells...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28607749/an-essential-role-of-virus-infected-b-cells-in-the-marmoset-experimental-autoimmune-encephalomyelitis-model
#7
REVIEW
Bert A 't Hart, Yolanda S Kap
Infection with Epstein-Barr virus (EBV) has been associated with an enhanced risk of genetically susceptible individuals to develop multiple sclerosis (MS). However, an explanation for the contrast between the high EBV infection prevalence (60-90%) and the low MS prevalence (0.1%) eludes us. Here we propose a new concept for the EBV-MS association developed in the experimental autoimmune encephalomyelitis model in marmoset monkeys, which are naturally infected with the EBV-related γ1-herpesvirus CalHV3. The data indicate that the infection of B cells with a γ1-herpesvirus endows them with the capacity to activate auto-aggressive CD8+ T cells specific for myelin oligodendrocyte glycoprotein...
January 2017: Multiple Sclerosis Journal—Experimental, Translational and Clinical
https://www.readbyqxmd.com/read/28592786/epstein-barr-virus-associated-lymphoproliferative-disorders-review-and-update-on-2016-who-classification
#8
Hyun-Jung Kim, Young Hyeh Ko, Ji Eun Kim, Seung-Sook Lee, Hyekyung Lee, Gyeongsin Park, Jin Ho Paik, Hee Jeong Cha, Yoo-Duk Choi, Jae Ho Han, Jooryung Huh
Epstein-Barr virus (human herpesvirus-4) is very common virus that can be detected in more than 95% of the human population. Most people are asymptomatic and live their entire lives in a chronically infected state (IgG positive). However, in some populations, the Epstein-Barr virus (EBV) has been involved in the occurrence of a wide range of B-cell lymphoproliferative disorders (LPDs), including Burkitt lymphoma, classic Hodgkin's lymphoma, and immune-deficiency associated LPDs (post-transplant and human immunodeficiency virus-associated LPDs)...
June 5, 2017: Journal of Pathology and Translational Medicine
https://www.readbyqxmd.com/read/28592428/ebv-infection-empowers-human-b-cells-for-autoimmunity-role-of-autophagy-and-relevance-to-multiple-sclerosis
#9
Elena Morandi, S Anwar Jagessar, Bert A 't Hart, Bruno Gran
The efficacy of B cell depletion therapy in multiple sclerosis indicates their central pathogenic role in disease pathogenesis. The B lymphotropic EBV is a major risk factor in multiple sclerosis, via as yet unclear mechanisms. We reported in a nonhuman primate experimental autoimmune encephalomyelitis model that an EBV-related lymphocryptovirus enables B cells to protect a proteolysis-sensitive immunodominant myelin oligodendrocyte glycoprotein (MOG) epitope (residues 40-48) against destructive processing...
June 7, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28584793/clinical-significance-of-p53-protein-expression-beta-catenin-expression-and-her2-expression-for-epstein-barr-virus-associated-gastric-cancer
#10
Dong Won Baek, Byung Woog Kang, Soyoon Hwang, Jong Gwang Kim, An Na Seo, Han Ik Bae, Oh Kyoung Kwon, Seung Soo Lee, Ho Young Chung, Wansik Yu
This study assessed the expression of the p53 protein, beta-catenin, and HER2 and their prognostic implications in patients with EBV-associated gastric cancer (EBVaGC). After reviewing 1318 consecutive cases of surgically resected or endoscopic submucosal dissected gastric cancers, 117 patients were identified as EBV-positive using EBV-encoded RNA in-situ hybridization. The immunohistochemistry results were interpreted as follows: strong p53 nuclear expression in at least 50% of tumor nuclei was interpreted as a positive result, strong beta-catenin expression in at least 10% of cytoplasmic nuclei was interpreted as a positive result, and moderate or strong complete or basolateral membrane staining in 10% of tumor cells was interpreted as a positive result for HER2...
May 2017: Chonnam Medical Journal
https://www.readbyqxmd.com/read/28581032/preemptive-therapy-with-rituximab-for-epstein-barr-virus-reactivation-after-haplo-hsct
#11
Shogo Kobayashi, Hideki Sano, Kazuhiro Mochizuki, Yoshihiro Ohara, Nobuhisa Takahashi, Hitoshi Ohto, Atsushi Kikuta
BACKGROUND: Epstein-Barr virus-related post-transplantation lymphoproliferative disorder (EBV-PTLD) is a serious complication in hematopoietic stem cell transplantation (HSCT) recipients. METHODS: We conducted a retrospective study to investigate the incidence and potential risk factors for EBV reactivation and to assess the efficacy of the management of EBV reactivation with preemptive rituximab in children who had T-cell-replete haploidentical HSCT (TCR-haplo-SCT) with low-dose anti-thymocyte globulin (ATG)...
June 5, 2017: Pediatrics International: Official Journal of the Japan Pediatric Society
https://www.readbyqxmd.com/read/28575863/differentiated-tumor-immune-microenvironment-of-epstein-barr-virus-associated-and-negative-gastric-cancer-implication-in-prognosis-and-immunotherapy
#12
Jing Ma, Jianhui Li, Yiming Hao, Yongzhan Nie, Zengshan Li, Meirui Qian, Qiaoyi Liang, Jun Yu, Musheng Zeng, Kaichun Wu
Epstein-Barr virus-associated gastric cancer (EBVaGC) has been proposed to be a distinct subtype with a specific immune microenvironment. Here, we evaluated tumor-infiltrating T-cell subsets and the expression of programmed cell death protein 1 (PD-1) and programmed death-ligand 1 (PD-L1) in 571 gastric cancers (GCs).Tissue microarrays were stained using EBER in situ hybridization for EBV and using immunohistochemistry for CD4, CD8, Foxp3, PD-1 and PD-L1. GCs were categorized into four types based on CD8+ infiltration and PD-L1 expression...
May 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28574826/leflunomide-teriflunomide-inhibit-epstein-barr-virus-ebv-induced-lymphoproliferative-disease-and-lytic-viral-replication
#13
Andrea Bilger, Julie Plowshay, Shidong Ma, Dhananjay Nawandar, Elizabeth A Barlow, James C Romero-Masters, Jillian A Bristol, Zhe Li, Ming-Han Tsai, Henri-Jacques Delecluse, Shannon C Kenney
EBV infection causes mononucleosis and is associated with specific subsets of B cell lymphomas. Immunosuppressed patients such as organ transplant recipients are particularly susceptible to EBV-induced lymphoproliferative disease (LPD), which can be fatal. Leflunomide (a drug used to treat rheumatoid arthritis) and its active metabolite teriflunomide (used to treat multiple sclerosis) inhibit de novo pyrimidine synthesis by targeting the cellular dihydroorotate dehydrogenase, thereby decreasing T cell proliferation...
May 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28570922/the-critical-amino-acids-of-a-nephritogenic-epitope-on-human-goodpasture-autoantigen-for-binding-to-hla-drb1-1501
#14
Qiu-Hua Gu, Xiao-Yu Jia, Jian-Nan Li, Fang-Jin Chen, Zhao Cui, Ming-Hui Zhao
BACKGROUND: Anti-GBM disease is caused by autoimmunity to Goodpasture antigen on α3(IV)NC1 and had strong associations with HLA-DRB1*1501. Previous studies identified α3127-148 (P14: TDIPPCPHGWISLWKGFSFIMF) as a T cell epitope. The present study was aimed to investigate the binding capacity of P14 to HLA-DRB1*1501 and the critical amino acids for this binding. METHODS: A line of EBV-transformed human B cells homozygous for HLA-DRB1*1501 was used to detect the binding capacity of peptides to HLA-DRB1*1501 using flow cytometry analysis...
May 29, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/28566607/development-of-extranodal-nk-t-cell-lymphoma-nasal-type-in-cerebrum-following-epstein-barr-virus-positive-uveitis
#15
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/28561270/barriers-to-generating-pdx-models-of-hpv-related-head-and-neck-cancer
#16
Nicole D Facompre, Varun Sahu, Kathleen T Montone, Kayla M Harmeyer, Hiroshi Nakagawa, Anil K Rustgi, Gregory S Weinstein, Phyllis A Gimotty, Devraj Basu
OBJECTIVES/HYPOTHESIS: Delineate factors impacting the creation and use of patient-derived xenografts (PDXs) of human papilloma virus-related (HPV+) head and neck squamous cell carcinomas (HNSCCs). STUDY DESIGN: Laboratory-based translational study. METHODS: Fifty-one surgically resected HNSCCs, including 31 HPV + cancers, were implanted into NOD/SCID/IL-2Rγ(-/-) (NSG) mice using standardized methodology. Clinical and pathologic factors were tested for association with engraftment...
May 31, 2017: Laryngoscope
https://www.readbyqxmd.com/read/28559386/role-of-sdf-1%C3%AE-cxcr4-signaling-pathway-in-clinicopathological-features-and-prognosis-of-patients-with-nasopharyngeal-carcinoma
#17
Yun-Ling Li, Yu-Fen Li, Hua-Feng Li, Huai-Qing Lv, De-Zhong Sun
The study aims to explore the role of stromal cell derived factor-1α (SDF-1α)/stromal cell derived factor receptor-4 (CXCR4) signaling pathway to the clinicopathological features and prognosis of patients with nasopharyngeal carcinoma (NPC). From January 2009 to December 2010, 102 patients with NPC and 80 patients with chronic nasopharyngitis were enrolled for the study. Immunohistochemical staining, qRT-PCR and Western blotting were employed to determine the expressions of SDF-1α and CXCR4 proteins in NPC tissues and chronic nasopharyngitis tissues...
May 30, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28557251/evidence-for-the-association-of-epstein-barr-virus-in-breast-cancer-in-indian-patients-using-in-situ-hybridization-technique
#18
Trupti Pai, Sudeep Gupta, Mamta Gurav, Shona Nag, Tanuja Shet, Asawari Patil, Sangeeta Desai
Epstein-Barr Virus (EBV) is etiologically linked to Burkitt lymphoma (BL), nasopharyngeal carcinoma, post-transplant lymphomas, Hodgkin disease, and possibly other tumors. However, the association of oncogenic EBV with breast carcinoma (BC) is still controversial and a matter of debate. We aimed to study the presence of EBV genome in BC cases in Indian patients and its association with the clinicopathological features. The formalin fixed paraffin embedded tissues from 83 women with primary invasive BC were studied for the presence of EBV by in-situ hybridization (ISH) technique for Epstein-Barr Virus Encoded RNA (EBER) with appropriate controls...
May 30, 2017: Breast Journal
https://www.readbyqxmd.com/read/28552984/methodological-approach-to-the-ex-vivo-expansion-and-detection-of-t-cruzi-specific-t-cells-from-chronic-chagas-disease-patients
#19
Gonzalo R Acevedo, Silvia A Longhi, Alcinette Bunying, Nazila Sabri, Augusto Atienza, María P Zago, Radleigh Santos, Valeria A Judkowski, Clemencia Pinilla, Karina A Gómez
The discovery of T cell epitopes is essential not only for gaining knowledge about host response to infectious disease but also for the development of immune-intervention strategies. In Chagas disease, given the size and complexity of the Trypanosoma cruzi proteome and its interaction with the host's immune system, the fine specificity of T cells has not been extensively studied yet, and this is particularly true for the CD4+ T cell compartment. The aim of the present work was to optimize a protocol for the generation of parasite-specific memory T cell lines, representative of their in vivo precursor populations and capable of responding to parasite antigens after long-term culture...
2017: PloS One
https://www.readbyqxmd.com/read/28550598/serum-ebv-ea-iga-and-vca-iga-antibodies-can-be-used-for-risk-group-stratification-and-prognostic-prediction-in-extranodal-nk-t-cell-lymphoma-24-year-experience-at-a-single-institution
#20
Yuhua Huang, Huilan Rao, Shumei Yan, Fang Wang, Qinian Wu, Yanfen Feng, Yujing Zhang
Although extranodal NK/T cell lymphoma (ENKTCL) is consistently associated with Epstein-Barr virus (EBV) infection, the manifestation and prognostic value of serum EBV antibodies still remain unknown. One hundred and forty-one patients with ENKTCL were evaluated for serum EBV EA-IgA and VCA-IgA antibodies levels in the past 24 years in our institution. Their correlation with clinicopathological features, plasma EBV DNA load, and patients' outcomes was analyzed. EBV EA-IgA ≥1:10 and VCA-IgA ≥1:160 were found in 18...
May 27, 2017: Annals of Hematology
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