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EBV Review

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, Betina Fabiani, Krimo Bouabdallah, Maria Gomes da Silva, Marie Maerevoet, Camille Laurent, Bertrand Coiffier, Gilles Salles, Alexandra Traverse-Glehen
Mediastinal grey zone lymphoma, B cell lymphomas with intermediate features between classical Hodgkin lymphoma and primary mediastinal B cell lymphoma, are not 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...
October 6, 2016: Haematologica
Antonino Carbone, Chiara C Volpi, Ambra V Gualeni, Annunziata Gloghini
PURPOSE OF REVIEW: The present review summarizes the association of the different histotypes of Epstein-Barr virus (EBV)-associated lymphomas with known genetic lesions and/or oncogenic viruses. A more comprehensive understanding of the complex interplay existing between genetic abnormalities of tumor cells and the viral contribution to the development of EBV-associated lymphomas is pivotal for the development of more effective treatments. RECENT FINDINGS: Recent evidence indicates that HIV may contribute to lymphomagenesis by acting directly on B lymphocytes as a critical microenvironmental factor...
October 15, 2016: Current Opinion in HIV and AIDS
Antonino Carbone, Annunziata Gloghini, Arnaldo Caruso, Paolo De Paoli, Riccardo Dolcetti
The pathogenesis of classical Hodgkin lymphoma (cHL) is still enigmatic, largely because its tumor cells, the so-called Hodgkin and Reed-Stenberg (HRS) cells, invariably reside in a prominent reactive microenvironment, are rare and therefore difficult to analyze. On the other hand, the broadly investigated cHL-derived cell lines are not unequivocally considered as suitable and representative models for this puzzling disease. Based on current knowledge, it appears that the cross talk between the tumour cells and the reactive infiltrate of the microenvironment is complex and that multiple mechanisms occur, making cHL a very heterogeneous disease...
October 17, 2016: International Journal of Cancer. Journal International du Cancer
Austen J J Worth, Charlotte J Houldcroft, Claire Booth
Epstein-Barr virus (EBV) infection is ubiquitous in humans, but the majority of infections have an asymptomatic or self-limiting clinical course. Rarely, individuals may develop a pathological EBV infection with a variety of life threatening complications (including haemophagocytosis and malignancy) and others develop asymptomatic chronic EBV viraemia. Although an impaired ability to control EBV infection has long been recognised as a hallmark of severe T-cell immunodeficiency, the advent of next generation sequencing has identified a series of Primary Immunodeficiencies in which EBV-related pathology is the dominant feature...
October 17, 2016: British Journal of Haematology
Ann M Moormann, Jeffrey A Bailey
Burkitt lymphoma (BL) is >90% EBV-associated when this pediatric cancer is diagnosed in regions heavily burden by endemic Plasmodium falciparum malaria and thus has been geographically classified as endemic BL. The incidence of endemic BL is 10-fold higher compared to BL diagnosed in non-malarious regions of the world. The other forms of BL have been classified as sporadic BL which contain EBV in ∼30% of cases and immunodeficiency BL which occurs in HIV-infected adults with ∼40% of tumors containing EBV...
September 26, 2016: Current Opinion in Virology
Julie Morscio, Thomas Tousseyn
Post-transplant lymphoproliferative disorder (PTLD) is an aggressive complication of solid organ and hematopoietic stem cell transplantation that arises in up to 20% of transplant recipients. Infection or reactivation of the Epstein-Barr virus (EBV), a ubiquitous human herpesvirus, in combination with chronic immunosuppression are considered as the main predisposing factors, however insight in PTLD biology is fragmentary. The study of PTLD is complicated by its morphological heterogeneity and the lack of prospective trials, which also impede treatment optimization...
September 24, 2016: World Journal of Transplantation
Claire Dossier, Agnès Jamin, Georges Deschênes
Steroid sensitive nephrotic syndrome is marked by a massive proteinuria and loss of podocytes foot processes. The mechanism of the disease remains debated but recent publications suggest a primary role of EBV. EBV replication in the peripheral blood is found in 50% of patients during the first flare of the disease. The genetic locus of steroid sensitive nephrotic syndrome was also identified as influencing antibodies directed against EBNA1. EBV is able to establish, latent benign infection in memory B cells that display phenotypes similar to antigen-selected memory B cells...
September 28, 2016: Pediatric Research
Fang Wei, Qing Zhu, Ling Ding, Qing Liang, Qiliang Cai
The cell membrane regulates many physiological processes including cellular communication, homing and metabolism. It is therefore not surprising that the composition of the host cell membrane is manipulated by intracellular pathogens. Among these, the human oncogenic herpesviruses Epstein-Barr virus (EBV) and Kaposi's sarcoma-associated herpesvirus (KSHV) exploit the host cell membrane to avoid immune surveillance and promote viral replication. Accumulating evidence has shown that both EBV and KSHV directly encode several similar membrane-associated proteins, including receptors and receptor-specific ligands (cytokines and chemokines), to increase virus fitness in spite of host antiviral immune responses...
September 12, 2016: Virologica Sinica
Ivan V Litvinov, Anna Shtreis, Kenneth Kobayashi, Steven Glassman, Matthew Tsang, Anders Woetmann, Denis Sasseville, Niels Ødum, Madeleine Duvic
Most skin malignancies are caused by external and often preventable environmental agents. Multiple reports demonstrated that cutaneous T-cell lymphomas (CTCL) can occur in married couples and cluster in families. Furthermore, recent studies document geographic clustering of this malignancy in Texas as well as in other areas of the United States. Multiple infectious, occupational, and medication causes have been proposed as triggers or promoters of this malignancy including hydrochlorothiazide diuretics, Staphylococcus aureus, dermatophytes, Mycobacterium leprae, Chlamydia pneumoniae, human T-Cell lymphotropic virus type 1 (HTLV1), Epstein-Barr virus (EBV), and herpes simplex virus (HSV)...
July 2016: Oncoimmunology
Obinna Chijioke, Vanessa Landtwing, Christian Münz
The herpesvirus Epstein-Barr virus (EBV) was discovered as the first human candidate tumor virus in Burkitt's lymphoma more than 50 years ago. Despite its strong growth transforming capacity, more than 90% of the human adult population carries this virus asymptomatically under near perfect immune control. The mode of primary EBV infection is in part responsible for EBV-associated diseases, including Hodgkin's lymphoma. It is, therefore, important to understand which circumstances lead to symptomatic primary EBV infection, called infectious mononucleosis (IM)...
2016: Frontiers in Immunology
J Pascual, A Royuela, A M Fernández, I Herrero, J F Delgado, A Solé, L Guirado, T Serrano, J de la Torre-Cisneros, A Moreno, E Cordero, R Gallego, C Lumbreras, J M Aguado
Appropriate post-transplant immunosuppressive regimens that avoid acute rejection, while reducing risk of viral reactivation, have been sought, but remain a chimera. Recent evidence suggesting potential regulatory and antiviral effects of mammalian target of rapamycin inhibitors (mTORi) is of great interest. Although the concept of an immunosuppressive drug with antiviral properties is not new, little effort has been made to put the evidence together to assess the management of immunosuppressive therapy in the presence of a viral infection...
September 7, 2016: Transplant Infectious Disease: An Official Journal of the Transplantation Society
H Liu, X L Tang, J R Liu, H M Li, S Y Zhao
OBJECTIVE: To analyze clinical and genetic features of activated PI3K-δ syndrome (APDS), a new form of immunodeficiency disease caused by PIK3CD gene mutation. METHOD: Data of two patients diagnosed as APDS at Second Department of Respiratory Medicine of Beijing Children's Hospital Affiliated to Capital Medical University in 2015 were retrospectively reviewed. Pathogenetic genes were screened by whole exome sequencing, and identified by first generation sequencing...
September 2016: Zhonghua Er Ke za Zhi. Chinese Journal of Pediatrics
Jamie Koo, David W Dawson, Sarah Dry, Samuel W French, Bita V Naini, Hanlin L Wang
In this study, we sought to determine the incidence of posttransplant complications including acute cellular rejection (ACR), infection, and posttransplant lymphoproliferative disease (PTLD) in mucosal allograft biopsies in patients with small bowel transplant at our institution. We retrospectively reviewed pathology reports from 5675 small bowel allograft biopsies from 99 patients and analyzed the following: indications for biopsy, frequency and grade of ACR, presence of infectious agents, results of work-up for potential PTLD, results of C4d immunohistochemistry (IHC), features of chronic mucosal injury, and findings in concurrent native bowel biopsies...
September 1, 2016: Clinical Transplantation
Rosemary Rochford, Anne Korir, Robert Newton
Since the discovery of Epstein-Barr virus (EBV) the first human virus associated with cancer in 1964, the number of human malignancies associated with viruses has grown. A review of cancer incidence reveals substantial variation in the incidence of such cancers around the world. In some parts of Africa, the majority of cancers are caused by infectious agents. However, there remain huge challenges in measuring the burden of cancer, especially in sub-Saharan Africa. Despite this limitation, it is clear that viral-associated malignancies are key drivers of cancer incidence rates in Africa...
August 20, 2016: Current Opinion in Virology
Soorebettu R Prabhu, David F Wilson
Epstein-Barr virus (EBV) is ubiquitous: over 90% of the adult population is infected with this virus. EBV is capable of infecting both B lymphocytes and epithelial cells throughout the body including the head and neck region. Transmission occurs mainly by exchange of saliva. The infection is asymptomatic or mild in children but, in adolescents and young adults, it causes infectious mononucleosis, a self-limiting disease characterized by lethargy, sore throat, fever and lymphadenopathy. Once established, the virus often remains latent and people become lifelong carriers without experiencing disease...
January 2016: Journal—Canadian Dental Association, Journal de L'Association Dentaire Canadienne
M A AlDabbagh, M R Gitman, D Kumar, A Humar, C Rotstein, S Husain
The role of antiviral prophylaxis for the prevention of posttransplant lymphoproliferative disease (PTLD) remains controversial for solid organ transplantation (SOT) recipients who are seronegative for Epstein-Barr virus (EBV) but who received organs from seropositive donors. We performed a systematic review and meta-analysis to address this issue. Two independent assessors extracted data from studies after determining patient eligibility and completing quality assessments. Overall, 31 studies were identified and included in the quantitative synthesis...
August 22, 2016: American Journal of Transplantation
Chien-Chin Chen, Kung-Chao Chang, L Jeffrey Medeiros, Julia Yu-Yun Lee
BACKGROUND: Hydroa vacciniforme (HV) is associated with Epstein-Barr virus (EBV) infection and a risk of transformation to lymphoma. METHODS: We retrospectively analyzed 6 HV cases for EBV association and transformation to HV-like T-cell lymphoma. Clinicopathologic features were reviewed and cases were assessed for EBV-encoded RNA (EBER) by in situ hybridization, double staining with immunohistochemistry and EBER, and for T-cell clonality. RESULTS: The male-to-female ratio was 5:1, with a median age at diagnosis of 18...
August 17, 2016: Journal of Cutaneous Pathology
Kung-Chao Chang, Jen-Chieh Lee, Yu-Chu Wang, Liang-Yi Hung, Yenlin Huang, Wan-Ting Huang, Ren-Ching Wang, Tse-Ching Chen, Yi-Shan Tsai, L Jeffrey Medeiros
Sclerosing angiomatoid nodular transformation (SANT) of the spleen is a morphologically distinctive lesion. Although the clinical course of SANT is benign, its reactive or neoplastic nature remains to be clarified. Furthermore, some investigators have suggested that SANT is related to IgG4 sclerosing lesion or inflammatory pseudotumor with stromal cells positive for Epstein-Barr virus (EBV). In this study, we assessed 22 cases of SANT derived from adult women. Clinical data and follow-up information were obtained by chart review...
October 2016: American Journal of Surgical Pathology
Abbas Agaimy
Sinonasal tract malignancies are uncommon, representing no more than 5% of all head and neck neoplasms. However, in contrast to other head and neck sites, a significant proportion of sinonasal neoplasms tend to display a poorly/ undifferentiated significantly overlapping morphology and a highly aggressive clinical course, despite being of diverse histogenetic and molecular pathogenesis. The wide spectrum of poorly differentiated sinonasal epithelial neoplasms with small "basaloid" blue cell morphology includes basaloid squamous cell carcinoma (both HPV+ and HPV-unrelated), nasopharyngeal-type lymphoepithelial carcinoma (EBV+), small/large cell neuroendocrine carcinoma, esthesioneuroblastoma, poorly differentiated carcinoma of salivary type (myoepithelial carcinoma and solid adenoid cystic carcinoma), NUT midline carcinoma, the recently described SMARCB1-deficient sinonasal carcinoma, sinonasal teratocarcinosarcoma and, as a diagnosis of exclusion, sinonasal undifferentiated carcinoma (SNUC)...
2016: Ceskoslovenská Patologie
Dürdal Us
Superantigens (SAgs) are microbial proteins produced by various microorganisms that elicit excessive and strong stimulation of T cells via an unconventional mechanism. They cause polyclonal activation of T cells in a non-specific manner, by binding to a particular variable-beta (Vβ) chain of T-cell receptor (TCR) and MHC class II molecule, in unprocessed form and outside of peptide-binding cleft, forming a bridge between the antigen presenting cell and the T cell. SAgs are classified into three groups, namely 1) exogenous (soluble proteins and exotoxins secreted by microorganisms), 2) endogenous (transmembrane proteins encoded by viruses which are integrated into the genome) and 3) B-cell SAgs (proteins which stimulate predominantly B cells)...
July 2016: Mikrobiyoloji Bülteni
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