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https://www.readbyqxmd.com/read/28916771/complete-fusion-of-a-transposon-and-herpesvirus-created-the-teratorn-mobile-element-in-medaka-fish
#1
Yusuke Inoue, Tomonori Saga, Takumi Aikawa, Masahiko Kumagai, Atsuko Shimada, Yasushi Kawaguchi, Kiyoshi Naruse, Shinichi Morishita, Akihiko Koga, Hiroyuki Takeda
Mobile genetic elements (e.g., transposable elements and viruses) display significant diversity with various life cycles, but how novel elements emerge remains obscure. Here, we report a giant (180-kb long) transposon, Teratorn, originally identified in the genome of medaka, Oryzias latipes. Teratorn belongs to the piggyBac superfamily and retains the transposition activity. Remarkably, Teratorn is largely derived from a herpesvirus of the Alloherpesviridae family that could infect fish and amphibians. Genomic survey of Teratorn-like elements reveals that some of them exist as a fused form between piggyBac transposon and herpesvirus genome in teleosts, implying the generality of transposon-herpesvirus fusion...
September 15, 2017: Nature Communications
https://www.readbyqxmd.com/read/28916317/presence-of-human-herpesvirus-8-hhv-8-dna-sequences-in-patients-with-lymphoproliferative-diseases-and-chronic-blood-disorders
#2
Hossein Keyvani, Mohammad Hadi Karbalaie Niya, Maryam Esghaei, Farah Bokharaei Salim, Seyed Hamid Reza Monavari
OBJECTIVE: Human herpesvirus 8 (HHV-8) is the causative agent of Kaposi's sarcoma (KS), but it has also been associated with different hematologic malignancies, including plasmablastic lymphoma, Multicentric Castleman's disease (MCD), primary effusion lymphoma (PEL) and various atypical lymphoproliferative disorders. Patients with underlying lymphoproliferative diseases and chronic blood disorders who become infected with this virus are at risk for human malignancies. This small study reported the frequency of human herpesvirus -8 in 81 Iranian patients with lymphoproliferative disorders for estimation of possible factors affecting malignancy...
September 12, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28914852/-efficiency-of-immunosuppressive-therapy-in-virus-negative-and-virus-positive-patients-with-morphologically-verified-lymphocytic-myocarditis
#3
O V Blagova, A V Nedostup, E A Kogan, V A Sulimov
AIM: To evaluate the efficiency of immunosuppressive therapy (IST) in virus-negative (V-) and virus-positive (V+) patients with lymphocytic myocarditis (LM). SUBJECTS AND METHODS: 60 patients (45 males) (mean age 46.7±11.8 years) with dilated cardiomyopathy (mean left ventricular (LV) end diastolic size (EDS) 6.7±0.7 cm; ejection fraction (EF) 26.2±9.1%) were examined. The diagnosis of active/borderline LM was verified by right ventricular endomyocardial biopsy in 38 patients, by intraoperative LV biopsy in 10, in the study of explanted hearts from 3 patients and at autopsy in 9...
2017: Terapevticheskiĭ Arkhiv
https://www.readbyqxmd.com/read/28914079/co-infection-of-human-herpesvirus-type-2-hhv-2-and-human-immunodeficiency-virus-hiv-among-pregnant-women-in-rio-de-janeiro-brazil
#4
Lyana Rodrigues Pinto Lima, Luis Eduardo Barros Costa Fernandes, Daniel A M Villela, Mariza Gonçalves Morgado, José Henrique Pilotto, Vanessa Salete de Paula
Pregnant women who are infected with the Human Immunodeficiency Virus (HIV) are particularly vulnerable to severe and recurrent infections with Human Herpesvirus 2 (HHV-2). Neonatal transmission of HHV-2 has been associated with malformations and neurological sequelae in infants, which makes it very important to perform antenatal monitoring for genital herpes. In the study, 134 pregnant women infected with HIV were tested for HHV-2 IgM and IgG using an enzyme-linked immunosorbent assay (ELISA) and had HHV-2 DNA analyzed by Real Time Polymerase Chain Reaction (qPCR)...
September 15, 2017: AIDS Care
https://www.readbyqxmd.com/read/28912500/dynamic-changes-in-the-splenic-transcriptome-of-chickens-during-the-early-infection-and-progress-of-marek-s-disease
#5
Lu Dang, Man Teng, Hua-Wei Li, Hui-Zhen Li, Sheng-Ming Ma, Pu Zhao, Xiu-Jie Li, Rui-Guang Deng, Gai-Ping Zhang, Jun Luo
Gallid alphaherpesvirus 2 (GaHV2) is an oncogenic avian herpesvirus inducing Marek's disease (MD) and rapid-onset T-cell lymphomas. To reveal molecular events in MD pathogenesis and tumorigenesis, the dynamic splenic transcriptome of GaHV2-infected chickens during early infection and pathogenic phases has been determined utilizing RNA-seq. Based on the significant differentially expressed genes (DEGs), analysis of gene ontology, KEGG pathway and protein-protein interaction network has demonstrated that the molecular events happening during GaHV2 infection are highly relevant to the disease course...
September 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28912069/generation-of-a-novel-human-cytomegalovirus-bacterial-artificial-chromosome-tailored-for-transduction-of-exogenous-sequences
#6
William L Close, Amit Bhandari, Marwa Hojeij, Philip E Pellett
The study of herpesviruses, including human cytomegalovirus (HCMV), is complicated by viral genome complexity and inefficient methods for genetic manipulation in tissue culture. Reverse genetics of herpesviruses has been facilitated by propagating their genomes in E. coli as bacterial artificial chromosomes (BACs), which enables complex and precise genetic manipulation using bacterial recombinational systems. Internal capsid volume imposes a strict limit on the length of genome that can be packaged efficiently...
September 11, 2017: Virus Research
https://www.readbyqxmd.com/read/28910389/cross-species-conservation-of-episome-maintenance-provides-a-basis-for-in-vivo-investigation-of-kaposi-s-sarcoma-herpesvirus-lana
#7
Aline C Habison, Marta Pires de Miranda, Chantal Beauchemin, Min Tan, Sofia A Cerqueira, Bruno Correia, Rajesh Ponnusamy, Edward J Usherwood, Colin E McVey, J Pedro Simas, Kenneth M Kaye
Many pathogens, including Kaposi's sarcoma herpesvirus (KSHV), lack tractable small animal models. KSHV persists as a multi-copy, nuclear episome in latently infected cells. KSHV latency-associated nuclear antigen (kLANA) binds viral terminal repeat (kTR) DNA to mediate episome persistence. Model pathogen murine gammaherpesvirus 68 (MHV68) mLANA acts analogously on mTR DNA. kLANA and mLANA differ substantially in size and kTR and mTR show little sequence conservation. Here, we find kLANA and mLANA act reciprocally to mediate episome persistence of TR DNA...
September 2017: PLoS Pathogens
https://www.readbyqxmd.com/read/28904201/heterogeneity-of-the-epstein-barr-virus-major-internal-repeat-reveals-evolutionary-mechanisms-of-ebv-and-a-functional-defect-in-the-prototype-ebv-strain-b95-8
#8
Mohammed Ba Abdullah, Richard Palermo, Anne Palser, Nicholas E Grayson, Paul Kellam, Samantha Correia, Agnieszka Szymula, Rob White
Epstein-Barr virus (EBV) is a ubiquitous pathogen of humans that can cause several types of lymphoma and carcinoma. Like other herpesviruses, EBV has diversified both through co-evolution with its host, and genetic exchange between virus strains. Sequence analysis of the EBV genome is unusually challenging, because of the large number and length of repeat regions within the virus. Here we describe the sequence assembly and analysis of the large internal repeat of EBV (IR1 or BamW repeats) from over 70 strains...
September 13, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28904200/epstein-barr-virus-bkrf4-gene-product-is-required-for-efficient-progeny-production
#9
H M Abdullah Al Masud, Takahiro Watanabe, Masahiro Yoshida, Yoshitaka Sato, Fumi Goshima, Hiroshi Kimura, Takayuki Murata
Epstein-Barr virus (EBV), a member of human gammaherpesvirus, infects mainly B cells. EBV has two alternative life cycles, latent and lytic, and is reactivated occasionally from the latent stage to the lytic cycle. To combat EBV-associated disorders, understanding the molecular mechanisms of the EBV lytic replication cycle is also important. Here, we focused on an EBV lytic gene, BKRF4. Using our anti-BKRF4 antibody, we revealed that the BKRF4 gene product is expressed during the lytic cycle with late kinetics...
September 13, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28904198/type-1-interferon-signalling-to-dendritic-cells-limits-murid-herpesvirus-4-spread-from-the-olfactory-epithelium
#10
Clara Lawler, Philip G Stevenson
Murid Herpesvirus-4 (MuHV-4) is a B cell-tropic gamma-herpesvirus that can be studied in vivo Despite viral evasion, type 1 interferons (IFN-I) limit its spread. After MuHV-4 inoculation into footpads, IFN-I protect lymph node subcapsular sinus macrophages (SSM) against productive infection; after peritoneal inoculation, they protect splenic marginal zone macrophages; and they limit MuHV-4 replication in the lungs. While invasive infections can test specific aspects of host colonization, it is important also to understand natural infection...
September 13, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28902954/predominant-contribution-of-cd4-t-cells-to-human-herpesvirus-6-hhv-6-load-in-the-peripheral-blood-of-patients-with-drug-induced-hypersensitivity-syndrome-and-persistent-hhv-6-infection
#11
Fumi Miyagawa, Yuki Nakamura, Rie Ommori, Kazuya Miyashita, Hiroshi Iioka, Natsuki Miyashita, Mitsuko Nishikawa, Yukiko Himuro, Kohei Ogawa, Hideo Asada
No abstract text is available yet for this article.
September 13, 2017: Acta Dermato-venereologica
https://www.readbyqxmd.com/read/28902907/pcr-detection-of-human-herpesviruses-in-colonic-mucosa-of-individuals-with-inflammatory-bowel-disease-comparison-with-individuals-with-immunocompetency-and-hiv-infection
#12
Takayuki Shimada, Naoyoshi Nagata, Koki Okahara, Akane Joya, Tsunefusa Hayashida, Shinichi Oka, Toshiyuki Sakurai, Junichi Akiyama, Naomi Uemura, Hiroyuki Gatanaga
BACKGROUND: Detection of human herpesviruses (HHVs) other than cytomegalovirus (CMV) in colonic mucosa of individuals with inflammatory bowel disease (IBD) remains unknown. This study identified eight HHVs in the colonic mucosa of individuals with IBD and compared the results with immunocompetent and human immunodeficiency virus (HIV)-infected individuals. METHODS: A total of 89 individuals who had colorectal ulcer on colonoscopy were enrolled: 26 with immunocompetency (n = 26), 41 with IBD, and 22 with HIV infection...
2017: PloS One
https://www.readbyqxmd.com/read/28901902/simian-varicella-virus-inhibits-the-interferon-gamma-signalling-pathway
#13
Werner J D Ouwendijk, Suzanne van Veen, Ravi Mahalingam, Georges M G M Verjans
The alphaherpesvirus simian varicella virus (SVV) causes varicella and zoster in nonhuman primates. Herpesviruses evolved elaborate mechanisms to escape host immunity, but the immune evasion strategies employed by SVV remain ill-defined. We analysed whether SVV impairs the cellular response to key antiviral cytokine interferon-γ (IFNγ). SVV infection inhibited the expression of IFNγ-induced genes like C-X-C motif chemokine 10 and interferon regulatory factor 1. Phosphorylation and nuclear translocation of the signal transducer and activator of transcription 1 (STAT1) was blocked in SVV-infected cells, which did not involve cellular and viral phosphatases...
September 13, 2017: Journal of General Virology
https://www.readbyqxmd.com/read/28901631/equine-behavioral-enrichment-toys-as-tools-for-non-invasive-recovery-of-viral-and-host-dna
#14
Peter A Seeber, Sanatana E Soilemetzidou, Marion L East, Chris Walzer, Alex D Greenwood
Direct collection of samples from wildlife can be difficult and sometimes impossible. Non-invasive remote sampling for the purpose of DNA extraction is a potential tool for monitoring the presence of wildlife at the individual level, and for identifying the pathogens shed by wildlife. Equine herpesviruses (EHV) are common pathogens of equids that can be fatal if transmitted to other mammals. Transmission usually occurs by nasal aerosol discharge from virus-shedding individuals. The aim of this study was to validate a simple, non-invasive method to track EHV shedding in zebras and to establish an efficient protocol for genotyping individual zebras from environmental DNA (eDNA)...
September 12, 2017: Zoo Biology
https://www.readbyqxmd.com/read/28900740/crispr-cas9-mediated-multiple-single-guide-rnas-potently-abrogate-pseudorabies-virus-replication
#15
Yan-Dong Tang, Ji-Ting Liu, Tong-Yun Wang, Ming-Xia Sun, Zhi-Jun Tian, Xue-Hui Cai
Pseudorabies virus (PRV) is a swine herpesvirus that causes significant morbidity and mortality in swine populations and has caused huge economic losses in the worldwide swine industry. Currently, there is no effective antiviral drug in clinical use for PRV infection; it is also difficult to eliminate PRV from infected swine. In our study, we set out to combat these swine herpesvirus infections by exploiting the CRISPR/Cas9 system. We designed 75 single guide RNAs (sgRNA) by targeting both essential and non-essential genes across the genome of PRV...
September 12, 2017: Archives of Virology
https://www.readbyqxmd.com/read/28898712/inhibition-of-the-lytic-cycle-of-kaposi-s-sarcoma-associated-herpesvirus-by-cohesin-factors-following-de-novo-infection
#16
Zsolt Toth, Richard J Smindak, Bernadett Papp
Establishment of Kaposi's sarcoma-associated herpesvirus (KSHV) latency following infection is a multistep process, during which polycomb proteins are recruited onto the KSHV genome, which is crucial for the genome-wide repression of lytic genes during latency. Strikingly, only a subset of lytic genes are expressed transiently in the early phase of infection prior to the binding of polycomb proteins onto the KSHV genome, which raises the question what restricts lytic gene expression in the first hours of infection...
September 9, 2017: Virology
https://www.readbyqxmd.com/read/28895870/protection-of-commercial-turkeys-following-inactivated-or-recombinant-h5-vaccine-application-against-the-2015u-s-h5n2-clade-2-3-4-4-highly-pathogenic-avian-influenza-virus
#17
Darrell R Kapczynski, Matthew J Sylte, Mary L Killian, Mia K Torchetti, Klaudia Chrzastek, David L Suarez
Between December 2014 and June 2015, North America experienced the largest recorded foreign animal disease outbreak with over 47 million poultry dead or euthanized from viral exposure to a clade 2.3.4.4 H5 highly pathogenic avian influenza (HPAI) epizootic. Soon after the epizootic began, the U.S. Department of Agriculture (USDA) began testing the efficacy of different vaccines as a possible future control strategy. The aim of these studies were to evaluate the efficacy three H5 vaccines to aid in control of HPAI in commercial turkeys...
September 2017: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/28893942/kaposi-sarcoma-herpesvirus-pathogenesis
#18
REVIEW
Giuseppe Mariggiò, Sandra Koch, Thomas F Schulz
Kaposi sarcoma herpesvirus (KSHV), taxonomical name human gammaherpesvirus 8, is a phylogenetically old human virus that co-evolved with human populations, but is now only common (seroprevalence greater than 10%) in sub-Saharan Africa, around the Mediterranean Sea, parts of South America and in a few ethnic communities. KSHV causes three human malignancies, Kaposi sarcoma, primary effusion lymphoma, and many cases of the plasmablastic form of multicentric Castleman's disease (MCD) as well as occasional cases of plasmablastic lymphoma arising from MCD; it has also been linked to rare cases of bone marrow failure and hepatitis...
October 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28893934/tumour-viruses-and-innate-immunity
#19
REVIEW
Sharon E Hopcraft, Blossom Damania
Host cells sense viral infection through pattern recognition receptors (PRRs), which detect pathogen-associated molecular patterns (PAMPs) and stimulate an innate immune response. PRRs are localized to several different cellular compartments and are stimulated by viral proteins and nucleic acids. PRR activation initiates signal transduction events that ultimately result in an inflammatory response. Human tumour viruses, which include Kaposi's sarcoma-associated herpesvirus, Epstein-Barr virus, human papillomavirus, hepatitis C virus, hepatitis B virus, human T-cell lymphotropic virus type 1 and Merkel cell polyomavirus, are detected by several different PRRs...
October 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28893933/tumour-virus-epidemiology
#20
REVIEW
Ruth M Lunn, Gloria D Jahnke, Charles S Rabkin
A viral etiology of cancer was first demonstrated in 1911 by Peyton Rous who injected cell-free filtrate from a chicken sarcoma into healthy chickens and found it induced a tumour. Since the discovery over 50 years ago of the Epstein-Barr virus as the cause of Burkitt lymphoma, seven other human viruses or groups of viruses-hepatitis B virus, hepatitis C virus, human immunodeficiency virus type 1, some human papillomaviruses, human T-cell lymphotropic virus type 1, Kaposi sarcoma-associated herpesvirus and Merkel cell polyomavirus-have been linked to human cancer...
October 19, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
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