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https://www.readbyqxmd.com/read/27916250/viral-serological-and-molecular-data-on-possible-involvement-of-herpes-viruses-in-periodontal-disease
#1
Cristiana Antipa, Coralia Bleotu, Camelia Grancea, Andreea Oana Rosu, Gabriela Anton, Simona Ruta
BACKGROUND: Recent studies have suggested that latent herpes virus infections can be associated with chronic periodontal sites that exhibit a predisposition to disease progression. The aim of this study was to identify the possible relationship between infections with CMV and EBV and the severity of periodontal disease. MATERIALS AND METHODS: Fifty two patients aged between 27 and 70 years, diagnosed with periodontal disease were enrolled in the study after giving informed consent...
December 2016: Singapore Dental Journal
https://www.readbyqxmd.com/read/27913304/effects-of-nongenetic-factors-on-immune-cell-dynamics-in-early-childhood-the-generation-r-study
#2
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/27904117/successful-cord-blood-stem-cell-transplantation-for-an-adult-case-of-chronic-active-epstein-barr-virus-infection
#3
Masuho Saburi, Masao Ogata, Takako Satou, Natsumi Yoshida, Kentaro Nagamatsu, Yuko Nashimoto, Yui Moroga, Kuniko Takano, Kazuhiro Kohno, Kuniaki Shirao
A 41-year-old man was referred to our hospital for treatment of anaplastic lymphoma kinase (ALK)-negative anaplastic large cell lymphoma. Chronic active Epstein-Barr virus (CAEBV) was diagnosed based on the findings of elevated EBV antibody titers and positive EBV-DNA in the peripheral blood, and cord blood stem cell transplantation (CBT) was performed. The EBV-DNA levels in the blood fell below the limit of detection. His lymphoma relapsed on Day 165 with the appearance of eruptions, which disappeared after the withdrawal of tacrolimus...
2016: Internal Medicine
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
#4
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/27900085/id1-upregulation-and-foxo3a-downregulation-by-epstein-barr-virus-encoded-lmp1-in-hodgkin-s-lymphoma
#5
Jun-Ichiro Ikeda, Naoki Wada, Satoshi Nojima, Shinichiro Tahara, Yoko Tsuruta, Kaori Oya, Eiichi Morii
Cancer-initiating cells (CICs) are specialized cells that have the ability to self-renew and are multipotent. We recently demonstrated that Forkhead box O3a (FoxO3a)-expressing cells exhibited a CIC-like potential in Hodgkin's lymphoma (HL). A proportion of HL patients are infected with Epstein-Barr virus (EBV). EBV-encoded latent membrane protein (LMP) 1 downregulates FoxO3a, suggesting that FoxO3a expression may be abolished in EBV-positive HL. Inhibitors of DNA-binding (ID) proteins are highly conserved transcription factors mediating stem cell functions...
November 2016: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/27893764/virus-mediated-alterations-in-mirna-factors-and-degradation-of-viral-mirnas-by-mcpip1
#6
Christine Happel, Dhivya Ramalingam, Joseph M Ziegelbauer
Kaposi's sarcoma-associated herpesvirus (KSHV), the causative agent of Kaposi's sarcoma, encodes 25 mature viral miRNAs. MCP-1-induced protein-1 (MCPIP1), a critical regulator of immune homeostasis, has been shown to suppress miRNA biosynthesis via cleavage of precursor miRNAs through its RNase domain. We demonstrate that MCPIP1 can directly cleave KSHV and EBV precursor miRNAs and that MCPIP1 expression is repressed following de novo KSHV infection. In addition, repression with siRNAs to MCPIP1 in KSHV-infected cells increased IL-6 and KSHV miRNA expression, supporting a role for MCPIP1 in IL-6 and KSHV miRNA regulation...
November 2016: PLoS Biology
https://www.readbyqxmd.com/read/27888664/ebv-associated-but-hhv8-unrelated-double-hit-effusion-based-lymphoma
#7
Bo-Jung Chen, David Yen-Ting Chen, Chun-Chi Kuo, Shih-Sung Chuang
Effusion-based lymphoma is a rare and unique type of large B-cell lymphoma presenting in effusion without a mass lesion. It shares many clinicopathological features with primary effusion lymphoma (PEL), but is distinct from PEL by the absence of HHV8 association. Double hit lymphoma (DHL) is an aggressive B-cell lymphoma, defined by concurrent rearrangement of MYC and BCL2 or BCL6. DHL often presents as lymphadenopathy or an extranodal mass, but rarely occurs in effusion. Here we report a 61-year-old male with alcoholic cirrhosis presenting as massive ascites and left pleural effusion...
November 26, 2016: Diagnostic Cytopathology
https://www.readbyqxmd.com/read/27887749/angiogenic-factors-are-associated-with-multiple-sclerosis
#8
Sajad Karampoor, Hamid Zahednasab, Sreeram Ramagopalan, Masoud Mehrpour, Hossein Keyvani
A growing body of evidence suggests that angiogenesis plays a crucial role in the pathogenesis of multiple sclerosis (MS). Animal models of MS show a significant improvement when the process of angiogenesis is halted. In this study, we measured the serum levels of vascular-endothelial growth factor (VEGF), soluble Endoglin (sEng), angiopoietin 1(Ang-1), angiopoietin 2 (Ang-2), and uric acid (UA) as well as serum anti-Epstein-Barr virus (EBV) EBNA-1 IgG in 50 MS patients (including 20 newly diagnosed and 30 patients taking IFN-beta for >6months) and 40 healthy individuals...
November 17, 2016: Journal of Neuroimmunology
https://www.readbyqxmd.com/read/27883370/epstein-barr-virus-associated-hemophagocytic-syndrome-after-scrub-typhus-infection
#9
Jeong Woo Hong, Hyun Seon You, Tae Won Lee, Won Yong Jo, Bo Ra Kim, Young Sun Suh, In Gyu Bae, Oh Hyun Cho
There have been a small number of cases of scrub typhus-associated hemophagocytic syndrome (HPS), most of which were treated successfully using adequate antibiotics. Here, we report a case of Epstein-Barr virus (EBV)-associated HPS after scrub typhus infection that was not improved using antirickettsial treatment. A 73-year-old male who had been diagnosed with scrub typhus according to an eschar and a positive serology was transferred to our institution because of a persistent fever despite 7-day doxycycline therapy...
November 8, 2016: Infection & Chemotherapy
https://www.readbyqxmd.com/read/27877083/epstein-barr-virus-lytic-reactivation-regulation-and-its-pathogenic-role-in-carcinogenesis
#10
REVIEW
Hongde Li, Sufang Liu, Jianmin Hu, Xiangjian Luo, Namei Li, Ann M Bode, Ya Cao
Epstein-Barr virus (EBV) has been associated with several types of human cancers. In the host, EBV can establish two alternative modes of life cycle, known as latent or lytic and the switch from latency to the lytic cycle is known as EBV reactivation. Although EBV in cancer cells is found mostly in latency, a small number of lytically-infected cells promote carcinogenesis through the release of growth factors and oncogenic cytokines. This review focuses on the mechanisms by which EBV reactivation is controlled by cellular and viral factors, and discusses how EBV lytic infection contributes to human malignancies...
2016: International Journal of Biological Sciences
https://www.readbyqxmd.com/read/27873282/ebv-directed-t-cell-therapeutics-for-ebv-associated-lymphomas
#11
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/27873281/generation-and-analysis-of-humanized-mouse-model-of-ebv-infection
#12
Ken-Ichi Imadome, Shigeyoshi Fujiwara
The recent development of severely immunodeficient mouse strains enabled the production of new-generation humanized mice, in which major components of the human immune system are reconstituted. These new-generation humanized mice can be infected with human pathogenic viruses that do not infect regular mice and target cells of the hematoimmune system. Here we describe the method for preparing humanized mice, infecting them with EBV, and for their virological and immunological analyses. The results obtained from our own mouse models are briefly described...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27873280/mice-with-reconstituted-human-immune-system-components-as-a-tool-to-study-immune-cell-interactions-in-ebv-infection
#13
Frank Heuts, Noemi Nagy
Recent developments in mouse models that harbor part of a human immune system have proved extremely valuable to study the in vivo immune response to human specific pathogens such as Epstein-Barr virus. Over the last decades, advances in immunodeficient mouse strains that can be used as recipients for human immune cells have greatly enhanced the use of these models. Here, we describe the generation of mice with reconstituted human immune system (HIS mice) using immunocompromised mice transplanted with human CD34(+) hematopoietic stem cells...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27873277/the-use-of-chromatin-precipitation-coupled-to-dna-sequencing-chip-seq-for-the-analysis-of-zta-binding-to-the-human-and-ebv-genome
#14
Anja Godfrey, Sharada Ramasubramanyan, Alison J Sinclair
Determining which components of the transcription machinery associate with the viral and cellular genome, and how this changes at specific stages of the viral life cycle is paramount to understanding how the distinct transcriptional programs associated with primary infection, latency, and disease are established and how they are reprogrammed during initiation and execution of the viral lytic replication cycle. Chromatin precipitations linked to next generation DNA sequencing (ChIP-Seq) allow for the interactions of proteins with DNA to be mapped across both viral and cellular genomes...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27873275/terminal-repeat-analysis-of-ebv-genomes
#15
Ferenc Bánáti, Anita Koroknai, Kálmán Szenthe
Epstein-Barr virus (EBV) was the first human virus associated directly with human malignancies. During EBV infection of various host cells the double-stranded linear EBV DNA carried by the virions undergoes circularization. Since there are variable numbers of terminal repetitions (TRs) at the ends of the linear EBV genome, the resulting circular episomes enclose a variable number of TRs. Thus, in cells carrying viral episomes, the sizes of the terminal restriction enzyme fragments of EBV is affected by the number of TRs (Raab-Traub and Flynn Cell 47:883-889, 1986)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27873274/functional-analysis-of-exosomes-derived-from-ebv-infected-cells
#16
Gulfaraz Khan, Pretty S Philip
Exosomes are diverse bioactive extracellular nanovesicles excreted by different cell types. These tiny membrane-bound vesicles, once thought to be functionally insignificant, are now believed to be important vehicles for transport and intercellular communication. Exosomes have been shown to contain a broad range of molecules, from miRNAs to proteins to soluble factors. Moreover, an accumulating body of evidence indicates that some viruses can hijack the exosomal excretory pathway to influence the microenvironment surrounding the infected cells...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27873273/isolation-and-characterization-of-exosomes-released-by-ebv-immortalized-cells
#17
Gulfaraz Khan, Waqar Ahmed
Epstein-Barr virus is an oncogenic herpesvirus associated with several human malignancies. Although the details of the molecular steps involved in EBV-mediated cell transformation and immune evasion are not fully known, a number of viral products, including EBV latent proteins and non-protein coding RNAs have been shown to be involved, directly or indirectly in these processes. In recent years, a growing body of data indicates that some viruses are able to transport selected products to neighboring cells and induce biological changes by exploiting the exosome secretory pathway...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27873272/analysis-of-viral-and-cellular-micrornas-in-ebv-infected-cells
#18
Rebecca L Skalsky
MicroRNAs are small, noncoding RNAs that posttranscriptionally regulate gene expression. The discovery of this relatively new mode of gene regulation as well as studies showing the prognostic value of viral and cellular miRNAs as biomarkers, such as in cancer progression, has stimulated the development of many methods to characterize miRNAs. EBV encodes 25 viral precursor microRNAs within its genome that are expressed during lytic and latent infection. In addition to viral miRNAs, EBV infection induces the expression of specific cellular oncogenic miRNAs, such as miR-155, miR-146a, miR-21, and others, that can contribute to the persistence of latently infected cells...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27873271/analysis-of-viral-promoter-usage-in-ebv-infected-cell-lines-a-comparison-of-qpcr-following-conventional-rna-isolation-and-nuclear-run-on-assay
#19
Kalman Szenthe, Ferenc Banati
To interpret the results of an epigenetic analysis in gene expression studies, it is essential to characterize the activity of the relevant promoters. According to the literature, real-time PCR assay is the most widely used method for the determination of latent EBV promoter usage. Here we describe two alternative approaches to measure the activity of viral promoters in cell lines carrying latent EBV episomes. The widespread typical approach relies on total cellular RNA isolation, whereas the nuclear run-on assay described here is based on the initial isolation of nuclei, followed by in vitro transcription in the presence of biotinylated-UTP, and purification of RNA transcripts using avidin-coated magnetic beads...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/27873267/generation-and-infection-of-organotypic-cultures-with-epstein-barr-virus
#20
Rachel M Temple, Craig Meyers, Clare E Sample
While numerous model systems are available to study EBV latency in B cells and have contributed greatly to our understanding of the role of these cells in the viral life cycle, models to study the EBV life cycle in epithelial cells in vitro are lacking. Epithelial cells are poorly infected in vitro, and EBV-infected cell lines have not been successfully obtained from epithelial tumors. Recently, we have demonstrated that organotypic cultures of oral keratinocytes can be used as a model to study EBV infection in the epithelial tissue...
2017: Methods in Molecular Biology
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