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Epstein-Barr virus (EBV) is a fascinating microorganism, as a "double-facetted" viral agent. After primary infection, it can persist throughout a person's lifetime in a latent form, from which it can reactivate following specific stimuli (i.e., immunodepression). Unlike other herpesviruses, EBV reactivates a countless number of times with such a high replication rate that it is unable to be controlled by conventional anti-herpesvirus drugs. Moreover, for various reasons, no vaccine is currently available in the market. This book presents a comprehensive overview of EBV, including information on its potential for oncogenic activity, its various isolates, and possible vaccine candidates.
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Epstein-Barr virus (EBV) is a ubiquitous virus that infects 95% of adults worldwide; the vast majority of persons have asymptomatic or non-specific primary infection and no complications associated with EBV during their lifetime. Some persons, particularly those who are infected as adolescents or young adults, develop infectious mononucleosis. EBV infects resting B cells and infection in vitro results in transformation and continuous proliferation of the cells, whereas infection in vivo results in a latent infection in which proliferation of the cells is controlled by virus-specific T cells and NK cells. Certain persons have mutations in genes that result in impaired cellular immunity involving the function of cytotoxic T cells or NK cells that result in impaired responses and failure to control EBV. These persons are at risk for fulminant infectious mononucleosis, EBV-associated hemophagocytosis, EBV B or T cell lymphoma, or other opportunistic infections. These genes encode proteins that are important for a variety of NK and T cell activities: T cell interactions with B cells, NK and T cell activation, NK and T cell cytotoxicity, priming and expansion of virus-specific T cells, and control of T cell apoptosis. For most of these diseases, hematopoietic stem cell transplantation has been the only curative therapy. However, identification of certain immune deficiencies has led to new approaches to therapy such as drugs to inhibit overactive signaling pathways or supplemental magnesium for patients with mutations in a magnesium transporter. The study of these EBV-associated immune deficiencies identifies the importance of these proteins for the function of T and NK cells and may lead to novel approaches to therapy for EBV diseases.
Epstein-Barr virus --- immune deficiency --- lymphoproliferative disease --- hemophagocytic lymphohistiocytosis --- B-cell lymphoma
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Oncogenic viruses. --- Tumors --- Virus diseases. --- Epstein-Barr virus diseases. --- Kaposi's sarcoma. --- Papillomaviruses. --- Virology.
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While the chapters in this book are a long way from solving the enigma that is CFS, they do represent important attempts to understand this complex and perplexing disease. A common theme in them all is CFS as a multisystem disease with the possibility of more than one cause and influenced by a variety of interacting factors. Further, they acknowledge the reality of CFS for persons with this disease and the importance of finding causes, treatments and ultimately a cure. As advanced biomedical research techniques are increasingly applied to the study of CFS, it is surely only a matter of time before biomarkers are identified, etiologies understood, and remedies devised.
Chronic fatigue syndrome. --- Chronic fatigue and immune dysfunction syndrome --- Chronic fatigue immune dysfunction syndrome --- Diseases --- Fatigue --- Syndromes --- Epstein-Barr virus diseases --- Psychiatry
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This Special Issue on CFS/ME collects 18 papers with an interdisciplinary view on the current demographic and epidemiological data and immunological characteristics of CFS/ME and examines the different pathogenic hypotheses, as well as giving information about the latest knowledge on diagnostic investigations, pharmacological, integrative, physical, cognitive-behavioral and psychological curative approaches.
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This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact
Epstein-Barr virus (EBV) --- EBV-associated T/NK-cell lymphoproliferative diseases --- chronic active EBV infection (CAEBV) --- hydroa vacciniforme-like lymphoproliferative disorder --- severe mosquito bite allergy --- extranodal NK/T-cell lymphoma-nasal type (ENKTL) --- aggressive NK-cell leukemia (ANKL) --- systemic EBV-positive T-cell lymphoma of childhood --- EBV-associatedhemophagocytic lymphohistiocytosis (EBV-HLH)
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G-quadruplexes (G4s) are nucleic acids secondary structures that form in DNA or RNA guanine (G)-rich strands. In recent years, the presence of G4s in microorganisms has attracted increasing interest. In prokaryotes, G4 sequences have been reported in several human pathogens. Bacterial enzymes able to process G4s have been identified. In viruses, G4s have been suggested to be involved in key steps of the viral life cycle: They have been associated with the human immunodeficiency virus (HIV), herpes simplex virus 1 (HSV-1), human papilloma virus, swine pseudorabies virus, and other viruses’ genomes. New evidence shows the presence of G4s in parasitic protozoa, such as the causative agent of malaria. G4 binding proteins and mRNA G4s have been implicated in the regulation of microorganisms’ genome replication and translation. G4 ligands have been developed and tested both as tools to study the complexity of G4-mediated mechanisms in the viral life cycle and as therapeutic agents. Moreover, new techniques to study G4 folding and their interactions with proteins have been developed. This Special Issue will focus on G4s present in microorganisms, addressing all the above aspects.
bacteria --- folding --- co-translational refolding --- RecQ helicase --- regulatory element --- conformational dynamics --- G4Hunter --- NDPK --- fluorescence --- pseudorabies virus --- Epstein-Barr virus (EBV) --- structure-activity relationship --- PhenDC3 --- eukaryotic hosts --- Herpesvirus --- translation suppression --- turn-on ligands --- co-transcriptional folding --- Herpesviridae --- G-quadruplex --- nucleoside diphosphate kinase --- nucleic acids --- nucleic acids conformation --- bioinformatics --- protein–DNA interaction --- aptamers --- deinococcus --- Alphaherpesvirinae --- EBNA1 --- G4 --- virus --- human papillomaviruses --- S. cerevisiae --- genome stability --- G-quadruplexes --- metastable structure --- genome evolution --- pyridostatin --- alphaherpesviruses --- structure --- protozoa --- genome --- G-quadruplex ligand --- NMR --- microbes --- DNA --- protein-mRNA interactions --- G-quadruplex formation --- immediate early promoters
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Gastric cancer represents one of the most frequent and lethal tumors worldwide today, finding itself in the fifth place in incidence and the third in mortality. Surgery remains the only curative treatment for localized tumors, but only 20% of patients are suitable for surgery due to the lack of specific symptoms and the late diagnosis, especially in Western countries. Additionally, even in patients who receive curative treatment, rates of locoregional relapse and distant metastasis remain high. Palliative chemotherapy is the principal treatment in cases of metastatic disease even if the prognosis of patients receiving chemotherapy is still poor. Therefore, a multidisciplinary evaluation is important in order to improve the efficacy of active treatments. In this context, there is an unmet need for a better understanding of genetic alterations and prognostic and predictive factors in order to choose the best tailored therapy for each patient. The aim of this Special Issue is to focus on the results and problems of multimodality treatment in metastatic gastric cancer, the search for prognostic and predictive factors, and the evaluation of novel strategies for individualized treatment. We are inviting relevant original research, systematic reviews, meta-analyses, and short communications covering the above-mentioned topics.
advanced gastric cancer --- precision medicine --- new drug development --- gastro-oesophageal cancer --- mutational concordance --- exome sequencing --- formalin fixed paraffin embedded --- biomarkers --- gastric cancer --- metastatic --- body composition --- sarcopenia --- visceral fat area --- subcutaneous fat area --- outcome --- toxicity --- liver metastasis --- conversion surgery --- hepatectomy --- stage iv gastric cancer --- immune checkpoint inhibitors --- Epstein Barr Virus --- tumor mutational burden --- microsatellite instability --- predictive biomarkers --- CAR T cell therapy --- vaccines --- nutritional status --- metastatic gastric cancer --- target therapy --- bone flare --- stage IV --- treatment --- RANK-L --- liquid biopsy --- circulating tumor cell --- cfDNA --- ctDNA --- epithelial–mesenchymal transition --- resistance to treatment --- HER2-inhibition --- VEGFR-inhibition --- immunotherapy --- response monitoring --- n/a --- epithelial-mesenchymal transition
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Antiviral agents are used for the treatment of viral diseases. Antiviral drugs have been successfully developed and used clinically for a limited number of important human viral diseases notably caused by human immunodeficiency virus (HIV), hepatitis C virus (HCV), hepatitis B virus (HBV), herpes, and influenza viruses. Despite the successes of these antiviral drugs, issues with drug resistance and toxicity remain challenging. These challenges are driving research to identify new drug candidates and to investigate novel drug targets to develop new mechanistic drug classes. Antiviral agents are not available against many viruses that cause human disease and economic burdens; in particular, the development of antiviral agents against emerging, re-emerging, and neglected viruses is increasingly becoming a priority. This book includes six review articles that discuss new antiviral strategies. The reviews either discuss advances relating to a specific virus or new therapeutic targets and approaches. The book includes 15 original research articles reporting new antiviral agents against a variety of clinically and economically important viruses and studies into the prevalence or acquisition of drug resistance. Overall, this book is an exciting collection of new research and ideas relating to the development of antiviral agents.
Zika virus --- nucleoside analogues --- antiviral agents --- NS5 --- prodrugs --- ProTides --- neural stem cells --- RNA-dependent RNA polymerase --- cytomegalovirus --- latent infection --- TALEN --- Surveyor nuclease mutation detection assay --- ie-1 gene --- quantitative real-time PCR --- Epstein–Barr virus --- herpes viruses --- lytic gene expression --- Burkitt lymphoma cells --- clozapine --- antipsychotic drug --- antiviral drug --- enteroviruses --- coxsackievirus B4 --- persistent infection --- fluoxetine --- resistance --- mutations --- herpes B virus --- macacine herpesvirus-1 --- genistein --- flavonoids --- acyclovir --- ganciclovir --- Plantago asiatica --- Clerodendrum trichotomum --- RSV --- therapeutic effects --- acteoside --- human antimicrobial peptides --- antiviral strategies --- defensins --- cathelicidins --- hepcidins --- transferrins --- influenza A virus --- brevilin A --- antiviral --- sesquiterpene lactone --- replication --- PRRSV --- polyethylenimine --- PEI --- virion internalization --- endocytosis --- HIV --- pediatrics --- Ethiopia --- pre-treatment drug resistance --- combination antiretroviral therapy (cART) --- dried plasma spots --- dried blood spots --- sphingolipids --- glycosphingolipids --- viruses --- lipid biosynthesis --- flavivirus --- Japanese encephalitis virus --- furin inhibitor --- precursor membrane protein --- measles virus --- central nervous system --- tropism --- treatments --- porcine reproductive and respiratory syndrome virus --- ginsenoside Rg1 --- antiviral activity --- pro-inflammatory factor --- NF-κB signaling pathway --- acute/latent infection --- congenital infection --- antiviral agent --- therapeutic strategies --- nucleic acid-based therapeutic approach --- HCMV vaccine --- adoptive cell therapy --- Rev response element --- chemical footprinting --- SHAPE --- drug discovery --- branched peptides --- herpesvirus --- immediate-early --- IE1 --- IE2 --- ribozyme --- RNA interference --- CRISPR/Cas --- small molecule --- orthohantavirus --- phenyl-benzotriazoles --- C-FRA --- Porcine circovirus type 2 --- epigallocatechin gallate --- heparan sulfate --- antiviral effect --- virus attachment --- microvirin --- lectin --- human immunodeficiency virus --- hepatitis C virus --- antiviral inhibitor --- non-immunogenic --- viral entry --- protein drugs --- LUMS1 --- oleanane-type derivatives --- influenza A virus (IAV) --- virus entry inhibitors --- hemagglutinin (HA) --- n/a --- Epstein-Barr virus
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A large number of diseases affect salivary gland (SG) secretion through different mechanisms, leading to SG dysfunction and associated oral problems. The glands may suffer from viral, bacterial, and, albeit rarely, fungal infections, which may cause painful swelling or obstruction; they could also become the target of an autoimmune attack or may be affected by various benign and malignant tumors which consist of a heterogeneous group of lesions with complex clinical–pathological characteristics. The loss of normal SG function results in widespread deterioration of oral health. This book, entitled “Diseases of Salivary Glands”, provides an overview of recent advances in the field of SG disorders, focusing on the cellular and molecular mechanisms involved in the pathogenesis of SG diseases and on the most innovative investigation techniques that could help to preserve patients’ health, function, and quality of life.
salivary glands --- minor salivary glands --- salivary gland carcinoma --- mucoepidermoid carcinoma --- in situ carcinoma --- intra-cystic carcinoma --- chronic kidney disease --- salivary gland dysfunction --- salivary biomarkers --- oxidative stress --- nitrosative stress --- viral infection --- Epstein-Barr virus --- HTLV-1 --- salivary gland epithelial cell --- Hashimoto’s disease --- saliva --- Sjögren’s syndrome --- autoimmune disease --- physiopathology --- treatment --- diagnosis --- review --- primary Sjögren’s syndrome --- imaging --- salivary gland --- sialography --- salivary gland ultrasonography --- magnetic resonance imaging --- sialendoscopy --- salivary gland scintigraphy --- positron emission tomography --- NF-κB --- inflammation --- autoimmunity --- innate cells --- adaptive cells --- MR sialography --- dynamic --- sublingual gland ducts --- xerostomia --- SGEC --- immortalization --- acinar --- ductal --- spheroid --- n/a --- autoimmune diseases --- Sjögren syndrome --- B-cell lymphoma --- extranodal marginal zone lymphoma --- MALT lymphoma --- primary breast lymphoma --- radiation --- hyposalivation --- purinergic signaling --- bystander effect --- P2 receptors --- radioprotection --- head and neck cancer --- oral candidiasis --- Hashimoto's disease --- Sjögren's syndrome --- primary Sjögren's syndrome --- Sjögren syndrome
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