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EBV T cells

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https://www.readbyqxmd.com/read/27917702/effectiveness-of-pegaspargase-gemcitabine-and-oxaliplatin-p-gemox-chemotherapy-combined-with-radiotherapy-in-newly-diagnosed-stage-ie-to-iie-nasal-type-extranodal-natural-killer-t-cell-lymphoma
#1
Wen Wei, Ping Wu, Li Li, Zhi-Hui Zhang
PURPOSE: Extranodal natural killer/T-cell lymphoma (ENKTL), nasal-type, is a distinct subtype of non-Hodgkin lymphoma. ENKTL is sensitive to radiotherapy, but the prognosis is poorer than those of other types of early stage lymphoma. To date, optimal treatment strategies for patients with early stage ENKTL have not been fully defined. METHODS: We retrospectively investigated the efficacy and safety of pegaspargase, gemcitabine, and oxaliplatin (P-GEMOX) combined with different dose radiotherapy (RT) in the treatment of 35 newly diagnosed, stage IE to IIE ENKTL patients at our institution from October 2011 to September 2015...
December 5, 2016: Hematology (Amsterdam, Netherlands)
https://www.readbyqxmd.com/read/27913781/synchronous-microscopic-epstein-barr-virus-positive-diffuse-large-b-cell-lymphoma-of-the-adrenal-and-lymphoplasmacytic-lymphoma-de-novo-disease-or-transformation
#2
Mufaddal T Moonim, Alia Nasir, Jonathan Hubbard, Nicholas Ketley, Paul Fields
Lymphomas arising in the adrenal are rare, and to our knowledge, 2 cases of Epstein-Barr virus (EBV)-positive diffuse large B-cell lymphomas (DLBCL) in an adrenal pseudocyst have been reported. We report an incidental EBV-positive DLBCL arising in an adrenal pseudocyst in a 58-year-old man with a 7-year history of lymphoplasmacytic lymphoma (LPL). The DLBCL was present in the fibrinous exudate, while the LPL resided in the cyst wall. The patient underwent de-roofing of the same cyst 3 years previously; review of histology revealed foci of LPL in the cyst wall, but not of DLBCL...
December 2, 2016: International Journal of Surgical Pathology
https://www.readbyqxmd.com/read/27913506/checkpoint-inhibition-and-cellular-immunotherapy-in-lymphoma
#3
Premal Lulla, Helen E Heslop
Hodgkin and non-Hodgkin lymphoma are both good targets for immunotherapy, as they are accessible to antibodies and cell-based immunotherapy, express costimulatory molecules, and express lineage-restricted, viral, and unique tumor antigens. Blockade of the programmed-death 1 (PD-1) immune checkpoint has produced very encouraging response rates in patients with Hodgkin lymphoma, whereas adoptive transfer of Epstein-Barr Virus (EBV)-specific T cells has shown clinical activity in patients with posttransplant lymphoma and other EBV-associated lymphomas...
December 2, 2016: Hematology—the Education Program of the American Society of Hematology
https://www.readbyqxmd.com/read/27913304/effects-of-nongenetic-factors-on-immune-cell-dynamics-in-early-childhood-the-generation-r-study
#4
Diana van den Heuvel, Michelle A E Jansen, Kazem Nasserinejad, Willem A Dik, Ellen G van Lochem, Liesbeth E Bakker-Jonges, Halima Bouallouch-Charif, Vincent W V Jaddoe, Herbert Hooijkaas, Jacques J M van Dongen, Henriëtte A Moll, Menno C van Zelm
BACKGROUND: . Numbers of blood leukocyte subsets are highly dynamic in childhood and differ greatly between individuals. Inter-individual variation is only partly accounted for by genetic factors. OBJECTIVE: Determine which nongenetic factors affect the dynamics of innate leukocytes, and naive and memory lymphocyte subsets. METHODS: . We performed six-color flow cytometry and linear mixed effect modeling to define the dynamics of 62 leukocyte subsets from birth to 6 years of age in 1,182 children with one to five measurements per individual...
November 29, 2016: Journal of Allergy and Clinical Immunology
https://www.readbyqxmd.com/read/27906865/management-of-post-transplant-lymphoproliferative-disorders
#5
Gabriela Llaurador, Lauren McLaughlin, Birte Wistinghausen
PURPOSE OF REVIEW: Post-transplant lymphoproliferative disease (PTLD) is a major complication of hematopoietic stem cell and solid organ transplantation. The incidence of transplantation in childhood has been steadily rising, making PTLD the most common form of lymphoproliferation in childhood. The purpose of this review is to summarize the role of the Epstein-Barr virus (EBV) in the pathophysiology and discuss the management of PTLD. RECENT FINDINGS: More than 90% of pediatric PTLD is EBV-positive...
November 30, 2016: Current Opinion in Pediatrics
https://www.readbyqxmd.com/read/27902324/ebi2-expression-in-b-lymphocytes-is-controlled-by-the-epstein-barr-virus-transcription-factor-brrf1-na-during-viral-infection
#6
Caleb Cornaby, Jilian L Jafek, Cameron Birrell, Vera Mayhew, Lauren Syndergaard, Jeffrey Mella, Wesley Cheney, Brian D Poole
EBI2 is an important chemotactic receptor that is involved in proper B-cell T-cell interactions. Epstein-Barr Virus (EBV) has been shown to upregulate this gene upon infection of cell lines, but the timing and mechanism of this upregulation, as well as its importance to EBV infection, remain unknown. This work investigated EBV's manipulation of EBI2 expression of primary naïve B cells. EBV infection induces EBI2 expression resulting in elevated levels of EBI2 after 24 hours until 7 days post-infection, followed by a dramatic decline (p = 0...
November 16, 2016: Journal of General Virology
https://www.readbyqxmd.com/read/27882252/sj%C3%A3-gren-s-syndrome-complicated-by-myeloid-natural-killer-cell-precursor-acute-leukemia-case-report-and-review-of-the-literature
#7
Hao Feng, Jianlin Qiao, Ningning Ding, Wei Chen, Kunming Qi, Xiuying Pan, Jiang Cao, Kailin Xu
We report a case of Sjögren's syndrome (SS) complicated by myeloid/natural killer (NK) cell precursor acute leukemia (M/NKPAL). A 75-year-old woman with a previous SS history for 2 years was routinely treated. Peripheral blood progenitor cells were increased, and subsequent bone marrow cell morphology examination showed the presence of acute myeloid leukemia type M4. However, flow cytometry analysis revealed that CD7/CD56/CD33/CD34/HLA-DR/cCD3 were all positive and myeloperoxidase- (MPO-) specific staining, other T cells, NK cells, and myeloid markers were all negative...
2016: Case Reports in Hematology
https://www.readbyqxmd.com/read/27879545/epstein-barr-virus-associated-mucocutaneous-ulcer-in-a-patient-with-t-cell-acute-lymphoblastic-leukemia-importance-of-accurate-diagnosis-and-conservative-management
#8
Anant Vatsayan, Ashish Gupta, Sanjay Ahuja, Rachel Egler, Rose C Beck, Yousif Matloub
Epstein-Barr virus-associated mucocutaneous ulcer (EBV-MCU) is a recently characterized entity that falls under the spectrum of EBV-lymphoproliferative disorders. First described in 2010 by Dojcinov et al, it is an EBV-driven localized proliferation of B cells, occurring in mucocutaneous tissues including the skin, the oropharynx, and the gastrointestinal tract of immunosuppressed patients in the absence of an intact T-cell repertoire. Typically, it has been described in elderly patients with age-related immunosenescence and patients who are on immunosuppressive therapy...
November 22, 2016: Journal of Pediatric Hematology/oncology
https://www.readbyqxmd.com/read/27873282/ebv-directed-t-cell-therapeutics-for-ebv-associated-lymphomas
#9
Lauren P McLaughlin, Stephen Gottschalk, Cliona M Rooney, Catherine M Bollard
Epstein Barr virus (EBV) is a human gamma herpes virus that establishes latency in B cells after primary infection. EBV generally only causes a mild, self-limiting viral illness but is also associated with several malignancies including posttransplantation lymphoproliferative disorder in the immunosuppressed host as well as Hodgkin and non-Hodgkin lymphoma in the immune competent host. The expression of EBV antigens by lymphoma has important applications as targets for adoptive T cell therapy. However, as many lymphomas only express subdominant EBV antigens that are less immunogenic, novel strategies are needed to manufacture EBV-specific T cell products specific for Latent Membrane Protein 1 (LMP1) and LMP2, which are expressed in lymphomas with type II and III latency...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27873264/current-trends-and-alternative-scenarios-in-ebv-research
#10
Janos Minarovits, Hans Helmut Niller
Epstein-Barr virus (EBV) infection is associated with several distinct hematological and epithelial malignancies, e.g., Burkitt lymphoma, Hodgkin lymphoma, nasopharyngeal carcinoma, gastric carcinoma, and others. The association with several malignant tumors of local and worldwide distribution makes EBV one of the most important tumor viruses. Furthermore, because EBV can cause posttransplant lymphoproliferative disease, transplant medicine has to deal with EBV as a major pathogenic virus second only to cytomegalovirus...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27872542/pulmonary-lymphomatoid-granulomatosis-a-case-report-with-review-of-literature
#11
Grover Ankita, Dhawan Shashi
Lymphomatoid granulomatosis is a rare, Epstein Barr Virus (EBV)-associated systemic angiodestructive disorder that may progress to a diffuse large B cell lymphoma. Pulmonary involvement occurs in over 90 % cases followed by kidney, skin and brain. WHO classifies lymphomatoid granulomatosis under the generic heading of B cell proliferations of uncertain malignant potential. Radiologically, pulmonary lymphomatoid granulomatosis (PLG) presents with non specific findings making histopathology the gold standard for diagnosis...
December 2016: Indian Journal of Surgical Oncology
https://www.readbyqxmd.com/read/27856754/mouse-model-for-acute-epstein-barr-virus-infection
#12
Tristan Wirtz, Timm Weber, Sven Kracker, Thomas Sommermann, Klaus Rajewsky, Tomoharu Yasuda
Epstein-Barr Virus (EBV) infects human B cells and drives them into continuous proliferation. Two key viral factors in this process are the latent membrane proteins LMP1 and LMP2A, which mimic constitutively activated CD40 receptor and B-cell receptor signaling, respectively. EBV-infected B cells elicit a powerful T-cell response that clears the infected B cells and leads to life-long immunity. Insufficient immune surveillance of EBV-infected B cells causes life-threatening lymphoproliferative disorders, including mostly germinal center (GC)-derived B-cell lymphomas...
November 29, 2016: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/27836419/ebv-infection-and-multiple-sclerosis-lessons-from-a-marmoset-model
#13
REVIEW
Bert A 'tHart, Yolanda S Kap, Elena Morandi, Jon D Laman, Bruno Gran
Multiple sclerosis (MS) is thought to be initiated by the interaction of genetic and environmental factors, eliciting an autoimmune attack on the central nervous system. Epstein-Barr virus (EBV) is the strongest infectious risk factor, but an explanation for the paradox between high infection prevalence and low MS incidence remains elusive. We discuss new data using marmosets with experimental autoimmune encephalomyelitis (EAE) - a valid primate model of MS. The findings may help to explain how a common infection can contribute to the pathogenesis of MS...
December 2016: Trends in Molecular Medicine
https://www.readbyqxmd.com/read/27830995/oncogenic-role-of-tumor-viruses-in-humans
#14
Nimrah Akram, Muhammad Imran, Mamoona Noreen, Fayyaz Ahmed, Muhammad Atif, Zareen Fatima, Ahmed Bilal Waqar
Viruses are the intracellular pathogens that reproduce only in the living cell and manipulate the cellular machinery to produce more viruses. Viral replications can affect cellular genes of the host in multiple cancerous ways. Approximately, 20% of all human oncogenesis is caused by cancer-causing viruses known as oncoviruses. Viral infection causes chronic inflammation leading to cell death, uncontrollable proliferation, and modulated expression of some of the regulatory proteins. Oncogenesis is a multistep phenomenon in which normal host cells are transformed into cancerous cells on the basis of host genetic variability...
November 10, 2016: Viral Immunology
https://www.readbyqxmd.com/read/27830541/achievement-of-disease-control-with-donor-derived-eb-virus-specific-cytotoxic-t-cells-after-allogeneic-peripheral-blood-stem-cell-transplantation-for-aggressive-nk-cell-leukemia
#15
Shojiro Haji, Motoaki Shiratsuchi, Takamitsu Matsushima, Akiko Takamatsu, Mariko Tsuda, Yasuhiro Tsukamoto, Emi Tanaka, Hirofumi Ohno, Eriko Fujioka, Yuriko Ishikawa, Ken-Ichi Imadome, Yoshihiro Ogawa
Aggressive NK-cell leukemia (ANKL) is characterized by systemic infiltration of Epstein-Barr virus (EBV)-associated natural killer cells and poor prognosis. We report a case of ANKL in which EBV-specific cytotoxic T lymphocytes (CTLs) were induced. A 41-year-old male suffered from fever, pancytopenia, and hepatosplenomegaly. The number of abnormal large granular lymphocytes in the bone marrow was increased and the cells were positive for CD56 and EBV-encoded small nuclear RNAs. The patient was diagnosed with ANKL and achieved a complete response following intensive chemotherapy...
November 9, 2016: International Journal of Hematology
https://www.readbyqxmd.com/read/27829019/subset-and-antigen-specific-effects-of-treg-on-cd8-t-cell-responses-in-chronic-hiv-infection
#16
Maria Nikolova, Aurélie Wiedemann, Maria Muhtarova, Daniela Achkova, Christine Lacabaratz, Yves Lévy
We, and others, have reported that in the HIV-negative settings, regulatory CD4+CD25highFoxP3+ T cells (Treg) exert differential effects on CD8 subsets, and maintain the memory / effector CD8+ T cells balance, at least in part through the PD-1/PD-L1 pathway. Here we investigated Treg-mediated effects on CD8 responses in chronic HIV infection. As compared to Treg from HIV negative controls (Treg/HIV-), we show that Treg from HIV infected patients (Treg/HIV+) did not significantly inhibit polyclonal autologous CD8+ T cell function indicating either a defect in the suppressive capacity of Treg/HIV+ or a lack of sensitivity of effector T cells in HIV infection...
November 2016: PLoS Pathogens
https://www.readbyqxmd.com/read/27821468/transient-reduction-in-iga-and-igg-memory-b-cell-numbers-in-young-ebv-seropositive-children-the-generation-r-study
#17
Diana van den Heuvel, Michelle A E Jansen, Andrew I Bell, Alan B Rickinson, Vincent W V Jaddoe, Jacques J M van Dongen, Henriette A Moll, Menno C van Zelm
The EBV is known to persist in memory B cells, but it remains unclear how this affects cell numbers and humoral immunity. We here studied EBV persistence in memory B cell subsets and consequences on B cell memory in young children. EBV genome loads were quantified in 6 memory B cell subsets in EBV(+) adults. The effects of EBV infection on memory B cell numbers and vaccination responses were studied longitudinally in children within the Generation R population cohort between 14 mo and 6 yr of age. EBV genomes were more numerous in CD27(+)IgG(+), CD27(+)IgA(+), and CD27(-)IgA(+) memory B cells than in IgM-only, natural effector, and CD27(-)IgG(+) B cells...
November 7, 2016: Journal of Leukocyte Biology
https://www.readbyqxmd.com/read/27813075/disease-etiology-and-diagnosis-by-tcr-repertoire-analysis-goes-viral
#18
Meriem Attaf, Andrew K Sewell
The importance of T-cell receptor (TCR) repertoire diversity is highlighted in murine models of immunodeficiency and in many human pathologies. However, the true extent of TCR diversity and how this diversity varies in health and disease is poorly understood. In a previous issue of the European Journal of Immunology, Lossius et al. [Eur. J. Immunol. 2014. 44: 3439-3452] dissected the composition of the TCR repertoire in the context of multiple sclerosis (MS) using high-throughput sequencing of TCR-β chains in cerebrospinal fluid samples and blood...
November 2016: European Journal of Immunology
https://www.readbyqxmd.com/read/27805626/pd-1-pd-l1-immune-checkpoint-blockade-in-b-cell-lymphomas
#19
REVIEW
Aaron Goodman, Sandip P Patel, Razelle Kurzrock
Cancer cells can escape T-cell-mediated cellular cytotoxicity by exploiting the inhibitory programmed cell-death protein 1 (PD-1)/programmed cell death 1 ligand 1 (PD-L1) immune checkpoint. Indeed, therapeutic antibodies that block the PD-1-PD-L1 axis induce durable clinical responses against a growing list of solid tumours. B-cell lymphomas also leverage this checkpoint to escape immune recognition, although the outcomes of PD-1-PD-L1 blockade, and the correlations between PD-L1 expression and treatment responses, are less-well elucidated in these diseases than in solid cancers...
November 2, 2016: Nature Reviews. Clinical Oncology
https://www.readbyqxmd.com/read/27803174/the-third-signal-cytokine-il-12-rather-than-immune-checkpoint-inhibitors-contribute-to-the-functional-restoration-of-hepatitis-d-virus-specific-t-cells
#20
Thomas Schirdewahn, Jan Grabowski, Solomon Owusu Sekyere, Birgit Bremer, Anika Wranke, Sebastian Lunemann, Verena Schlaphoff, Janina Kirschner, Svenja Hardtke, Michael Peter Manns, Markus Cornberg, Heiner Wedemeyer, Pothakamuri Venkata Suneetha
BACKGROUND:  Hepatitis D virus (HDV) infection affects 15-20 million individuals world-wide and causes severely progressive hepatitis. It is unknown to what extent cellular immune responses contribute to liver disease and control of viral replication in HDV infection. METHODS:  Immune cell frequencies and phenotypes were determined in 49 HDV-infected patients, 25 HBV-monoinfected individuals and 18 healthy controls. T-cell proliferative and cytokine-producing capacities were analysed by stimulation with overlapping peptides spanning the large HDV antigen...
October 31, 2016: Journal of Infectious Diseases
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