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Marek's disease virus

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https://www.readbyqxmd.com/read/28930088/comparison-of-pcr-methods-for-the-detection-of-genetic-variants-of-carp-edema-virus
#1
Mikolaj Adamek, Marek Matras, Verena Jung-Schroers, Felix Teitge, Max Heling, Sven M Bergmann, Michal Reichert, Keith Way, David M Stone, Dieter Steinhagen
The infection of common carp and its ornamental variety, koi, with the carp edema virus (CEV) is often associated with the occurrence of a clinical disease called 'koi sleepy disease'. The disease may lead to high mortality in both koi and common carp populations. To prevent further spread of the infection and the disease, a reliable detection method for this virus is required. However, the high genetic variability of the CEV p4a gene used for PCR-based diagnostics could be a serious obstacle for successful and reliable detection of virus infection in field samples...
September 20, 2017: Diseases of Aquatic Organisms
https://www.readbyqxmd.com/read/28910208/immunohistochemical-and-immunocytochemical-findings-associated-with-marek-s-disease-virus-in-naturally-infected-laying-hens
#2
O Yavuz, H Erer
We compared immunohistochemical (IHC) staining of tissue sections of liver, kidney, spleen, lung, proventriculus, sciatic nerve, bursa of Fabricius, brain, heart, intestine and skin; immunocytochemical (ICC) staining of peripheral blood samples and touch preparations of liver, spleen and kidney of laying hens naturally infected with Marek's disease (MD) virus. We used one hundred and fifty 5-17-week-old commercial hens. IHC and ICC staining were performed using polymer-based techniques. IHC staining exhibited mostly free immunopositive reactions in tumor cells and in the cytoplasm of the parenchymal cells of liver, kidney, spleen and bursa of Fabricius...
September 14, 2017: Biotechnic & Histochemistry: Official Publication of the Biological Stain Commission
https://www.readbyqxmd.com/read/28860661/long-intergenic-non-coding-rna-galmd3-in-chicken-marek-s-disease
#3
Bo Han, Yanghua He, Li Zhang, Yi Ding, Ling Lian, Chunfang Zhao, Jiuzhou Song, Ning Yang
Long intergenic non-coding RNAs (lincRNAs) are transcribed from non-coding DNA sequences. Studies have revealed that aberrant expressions of lincRNAs are associated with various types of cancers and neurological disorders. Marek's disease (MD) is a highly contagious T-cell lymphoid neoplasia of chicken induced by Marek's disease virus (MDV). In this study, we first identified and validated linc-GALMD3 highly expressed in MDV-infected CD4+ T cells by RNA-Seq and qRT-PCR. By RNA-Seq analysis in MDCC-MSB1 cells after loss of function of linc-GALMD3 by shRNA, we found that linc-GALMD3 could positively cis-regulate its downstream gga-miR-223 gene expression...
August 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28859493/characterizing-the-histopathology-of-natural-co-infection-with-marek-s-disease-virus-and-subgroup-j-avian-leukosis-virus-in-egg-laying-hens
#4
Yawen Wen, Qi Huang, Chengcheng Yang, Ling Pan, Guijun Wang, Kezong Qi, Hongmei Liu
Marek's disease virus (MDV) and avian leukosis virus (ALV) are known to cause tumours in egg-laying hens. Here, we investigated the aetiology of tumours in a flock of egg-laying hens vaccinated against MDV. We carried out gross pathology and histopathological examinations of the diseased tissues, identified virus antigen and sequenced viral oncogenes to elucidate the cause of death in 21-22-wk-old hens. At necropsy, diseased hens had distinctly swollen livers, spleens, and proventriculus, and white tumour nodules in the liver...
September 1, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28819105/a-novel-method-for-genome-wide-profiling-of-dynamic-host-pathogen-interactions-using-3-end-enriched-rna-seq
#5
Jie Li, Liangliang He, Yun Zhang, Chunyi Xue, Yongchang Cao
Marek's disease is a contagious lymphoproliferative disease of chickens and typical model of viral oncogenesis. Mapping changes or different states over the course of infection for both host and pathogen would provide important insights into dynamic host-pathogen interactions. Here we introduced 3' end enriched RNA-seq as a novel method to study host-pathogen interactions in chicken embryo fibroblasts cells challenged with Marek's disease virus. The method allowed accurate profiling of gene expression and alternative polyadenylation sites for host and pathogen simultaneously...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28812393/innate-lymphoid-cells-the-role-in-respiratory-infections-and-lung-tissue-damage
#6
Anna Głobińska, Marek L Kowalski
Innate lymphoid cells (ILCs) represent a diverse family of cells of the innate immune system, which play an important role in regulation of tissue homeostasis, immunity and inflammation. Emerging evidence has highlighted the importance of ILCs in both protective immunity to respiratory infections and their pathological roles in the lungs. Therefore, the aim of this review is to summarize the current knowledge, interpret and integrate it into broader perspective, enabling greater insight into the role of ILCs in respiratory diseases...
October 2017: Expert Review of Clinical Immunology
https://www.readbyqxmd.com/read/28804982/epidemiological-investigation-of-outbreaks-of-fowl-adenovirus-infections-in-commercial-chickens-in-china
#7
Y Niu, Q Sun, G Zhang, W Sun, X Liu, Y Xiao, Y Shang, S Liu
One hundred and five fowl adenovirus (FAdV) strains were isolated in China from 2015 to 2016 from poultry with inclusion body hepatitis (IBH) and hydropericardium syndrome (HPS). Polymerase chain reactions determined that 68 were FAdV species C, five were FAdV species D, two were FAdV species E, and 30 contained two or more different FAdV strains. A phylogenetic analysis showed that the isolated FAdV strains clustered into three major groups: FAdV-C, FAdV-D and FAdV-E. Based on a hexon gene sequencing analysis, these viruses were genetically related to FAdV-4, FAdV-7, FAdV-8b and FAdV-11, of which FAdV-4 was dominant (93% of the strains)...
August 13, 2017: Transboundary and Emerging Diseases
https://www.readbyqxmd.com/read/28762757/molecular-characterization-and-phylogenetic-analysis-of-virulent-marek-s-disease-virus-field-strain-in-broiler-chickens-in-japan
#8
Hoda A Abd-Ellatieff, Abdelrahman A Abou Rawash, Hany F Ellakany, Wael M Goda, T Suzuki, Tokuma Yanai
Marek's disease (MD) is a lymphoproliferative disease causing a serious threat in poultry production. Field strains of Marek's disease virus (MDVs) are continuously re-emerging, causing great economical losses to the poultry industry worldwide in spite of the intensive vaccination and restrictive management policy used. Histopathological and molecular characterizations of MDVs are essential for monitoring the changes of viruses and evaluating the effectiveness of existing vaccines. During 2016, 190 visceral tumor tissues representing 30 vaccinated chicken flocks from Gifu prefecture, Japan were analyzed...
August 1, 2017: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/28757026/marek-s-disease-virus-type-1-encoded-analog-of-mir-155-promotes-proliferation-of-chicken-embryo-fibroblast-and-df-1-cells-by-targeting-hnrnpab
#9
Lu Dang, Man Teng, Hui-Zhen Li, Sheng-Ming Ma, Qing-Xia Lu, Hui-Fang Hao, Dong Zhao, En-Min Zhou, Gai-Ping Zhang, Jun Luo
Marek's disease virus type 1 (MDV-1) is a representative oncogenic Alpha herpesvirus that causes an immunosuppressive and neoplastic lymphoproliferative avian disease, namely Marek's disease (MD). The rapid-onset T-cell lymphoma in chickens induced by MDV-1 has been historically regarded as an ideal natural model for herpesvirus-related cancer research. As a viral analog of cellular miR-155, the MDV-1-encoded miR-M4-5p has been shown to be crucial for the virally-induced MD tumorigenesis. Our previous studies demonstrated that miR-M4-5p induces an over-expression of oncogene c-Myc by targeting LTBP1 and suppressing the TGF-β signaling pathway during MDV-1 infection...
August 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28754487/recombinant-gallid-herpesvirus-2-with-interrupted-meq-genes-confers-safe-and-efficacious-protection-against-virulent-field-strains
#10
Yanping Zhang, Changjun Liu, Fuhai Yan, Ailing Liu, Yun Cheng, Zhijie Li, Guorong Sun, Hongchao Lv, Xiaomei Wang
Gallid herpesvirus 2 (GaHV-2) continuously evolves, which reduces the effectiveness of existing vaccines. To construct new GaHV-2 candidate vaccines, LMS, which is a virulent GaHV-2 field strain isolated from diseased chicken flocks in Southwest China in 2007, was modified such that both copies of its meq oncogene were partially deleted. The resulting virus, i.e., rMSΔmeq, was characterized using PCR and sequencing. To evaluate the safety and protective efficacy of rMSΔmeq, specific pathogen-free (SPF) chickens were inoculated with 2000 plaque forming units (pfu) and 20,000pfu of rMSΔmeq immediately after hatching...
July 25, 2017: Vaccine
https://www.readbyqxmd.com/read/28694799/a-tiny-rna-that-packs-a-big-punch-the-critical-role-of-a-viral-mir-155-ortholog-in-lymphomagenesis-in-marek-s-disease
#11
REVIEW
Guoqing Zhuang, Aijun Sun, Man Teng, Jun Luo
MicroRNAs (miRNAs) are small non-coding RNAs that have been identified in animals, plants, and viruses. These small RNAs play important roles in post-transcriptional regulation of various cellular processes, including development, differentiation, and all aspects of cancer biology. Rapid-onset T-cell lymphoma of chickens, namely Marek's disease (MD), induced by Gallid alphaherpesvirus 2 (GaHV2), could provide an ideal natural animal model for herpesvirus-related cancer research. GaHV2 encodes 26 mature miRNAs derived from 14 precursors assembled in three distinct gene clusters in the viral genome...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28677643/telomeres-and-telomerase-role-in-marek-s-disease-virus-pathogenesis-integration-and-tumorigenesis
#12
REVIEW
Ahmed Kheimar, Renato L Previdelli, Darren J Wight, Benedikt B Kaufer
Telomeres protect the ends of vertebrate chromosomes from deterioration and consist of tandem nucleotide repeats (TTAGGG)n that are associated with a number of proteins. Shortening of the telomeres occurs during genome replication, thereby limiting the replication potential of somatic cells. To counteract this shortening, vertebrates encode the telomerase complex that maintains telomere length in certain cell types via de novo addition of telomeric repeats. Several herpesviruses, including the highly oncogenic alphaherpesvirus Marek's disease virus (MDV), harbor telomeric repeats (TMR) identical to the host telomere sequences at the ends of their linear genomes...
July 4, 2017: Viruses
https://www.readbyqxmd.com/read/28665725/industry-wide-surveillance-of-marek-s-disease-virus-on-commercial-poultry-farms
#13
David A Kennedy, Christopher Cairns, Matthew J Jones, Andrew S Bell, Rahel M Salathé, Susan J Baigent, Venugopal K Nair, Patricia A Dunn, Andrew F Read
Marek's disease virus is a herpesvirus of chickens that costs the worldwide poultry industry more than US$1 billion annually. Two generations of Marek's disease vaccines have shown reduced efficacy over the last half century due to evolution of the virus. Understanding where the virus is present may give insight into whether continued reductions in efficacy are likely. We conducted a 3-yr surveillance study to assess the prevalence of Marek's disease virus on commercial poultry farms, determine the effect of various factors on virus prevalence, and document virus dynamics in broiler chicken houses over short (weeks) and long (years) timescales...
June 2017: Avian Diseases
https://www.readbyqxmd.com/read/28652615/gga-mir-219b-targeting-bcl11b-suppresses-proliferation-migration-and-invasion-of-marek-s-disease-tumor-cell-msb1
#14
Chunfang Zhao, Xin Li, Bo Han, Zhen You, Lujiang Qu, Changjun Liu, Jiuzhou Song, Ling Lian, Ning Yang
Marek's disease (MD), caused by Marek's disease virus (MDV), is a lymphotropic neoplastic disease. Previous miRNAome analysis showed gga-miR-219b was significantly downregulated in MDV-induced lymphoma, and one of its potential target genes, B-cell chronic lymphocytic /lymphoma 11B (BCL11B) was predicted. In this study, we further investigated the function of gga-miR-219b, and the gain/loss of function assay showed gga-miR-219b inhibited cell migration and reduced cell proliferation by promoting apoptosis not by cell cycle arrest...
June 26, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28635675/co-infection-with-marek-s-disease-virus-and-reticuloendotheliosis-virus-increases-illness-severity-and-reduces-marek-s-disease-vaccine-efficacy
#15
Guo-Rong Sun, Yan-Ping Zhang, Lin-Yi Zhou, Hong-Chao Lv, Feng Zhang, Kai Li, Yu-Long Gao, Xiao-Le Qi, Hong-Yu Cui, Yong-Qiang Wang, Li Gao, Qing Pan, Xiao-Mei Wang, Chang-Jun Liu
Marek's disease virus (MDV) and reticuloendotheliosis virus (REV) cause Marek's disease (MD) and reticuloendotheliosis (RE), respectively. Co-infection with MDV and REV is common in chickens, causing serious losses to the poultry industry. However, experimental studies of such co-infection are lacking. In this study, Chinese field strains of MDV (ZW/15) and REV (JLR1501) were used as challenge viruses to evaluate the pathogenicity of co-infection and the influence of MD vaccination in chickens. Compared to the MDV-challenged group, the mortality and tumor rates increased significantly by 20...
June 21, 2017: Viruses
https://www.readbyqxmd.com/read/28622640/clinical-course-and-core-variability-in-hbv-infected-patients-without-detectable-anti-hbc-antibodies
#16
Olympia E Anastasiou, Marek Widera, Jens Verheyen, Johannes Korth, Guido Gerken, Fabian A Helfritz, Ali Canbay, Heiner Wedemeyer, Sandra Ciesek
BACKGROUND: The presence of anti-HBc antibodies indicates direct encounter of the immune system with hepatitis B virus (HBV). OBJECTIVES: Aim of our study was to seek for anti-HBc negative but HBV replicating patients and analyze their clinical course and preconditions. STUDY DESIGN: From 1568 HBV-DNA positive patients, 29 patients (1.85%) tested negative for anti-HBc. The absence of anti-HBc could be confirmed in 19 patients using an alternative assay...
June 8, 2017: Journal of Clinical Virology: the Official Publication of the Pan American Society for Clinical Virology
https://www.readbyqxmd.com/read/28604814/functional-paralysis-of-gm-csf-derived-bone-marrow-cells-productively-infected-with-ectromelia-virus
#17
Lidia Szulc-Dąbrowska, Justyna Struzik, Agnieszka Ostrowska, Maciej Guzera, Felix N Toka, Magdalena Bossowska-Nowicka, Małgorzata M Gieryńska, Anna Winnicka, Zuzanna Nowak, Marek G Niemiałtowski
Ectromelia virus (ECTV) is an orthopoxvirus responsible for mousepox, a lethal disease of certain strains of mice that is similar to smallpox in humans, caused by variola virus (VARV). ECTV, similar to VARV, exhibits a narrow host range and has co-evolved with its natural host. Consequently, ECTV employs sophisticated and host-specific strategies to control the immune cells that are important for induction of antiviral immune response. In the present study we investigated the influence of ECTV infection on immune functions of murine GM-CSF-derived bone marrow cells (GM-BM), comprised of conventional dendritic cells (cDCs) and macrophages...
2017: PloS One
https://www.readbyqxmd.com/read/28591220/comparative-transcriptomics-of-genetically-divergent-lines-of-chickens-in-response-to-marek-s-disease-virus-challenge-at-cytolytic-phase
#18
COMPARATIVE STUDY
Kunzhe Dong, Shuang Chang, Qingmei Xie, Alexis Black-Pyrkosz, Huanmin Zhang
Marek's disease (MD), caused by Marek's disease virus (MDV), remains an economically significant threat to the poultry industry worldwide. Genetic resistance to MD is a promising alternative strategy to augment current control measures (vaccination and management). However, only a few functional genes reportedly conferring MD resistance have been identified. Here, we performed a comparative transcriptomics analysis of two highly inbred yet genetically divergent lines of chickens (line 63 and 72) that are resistant and susceptible to MD, respectively, in response to a very virulent plus strain of MDV (vv+MDV) challenge at cytolytic phase...
2017: PloS One
https://www.readbyqxmd.com/read/28570620/viral-etiologies-in-adult-patients-with-encephalitis-in-poland-a-prospective-single-center-study
#19
Marta Popiel, Karol Perlejewski, Agnieszka Bednarska, Tomasz Dzieciątkowski, Marcin Paciorek, Dariusz Lipowski, Monika Jabłonowska, Hanna Czeszko-Paprocka, Iwona Bukowska-Ośko, Kamila Caraballo Cortes, Agnieszka Pawełczyk, Maria Fic, Andrzej Horban, Marek Radkowski, Tomasz Laskus
Encephalitis is a severe neurological syndrome associated with high morbidity and mortality as well as long-term neurological sequelae. Despite being an important public health problem, very few extensive population-based studies were conducted so far in the world and none in Central Europe. Altogether 114 consecutive patients meeting the initial criteria for encephalitis were enrolled at the Warsaw Hospital for Infectious Diseases between June 2012 and July 2015. Eighteen patients were secondarily excluded from the analysis due to incomplete data or noinfectious cause...
2017: PloS One
https://www.readbyqxmd.com/read/28548038/marek-s-disease-virus-infection-of-phagocytes-a-de-novo-in-vitro-infection-model
#20
Pankaj Chakraborty, Lonneke Vervelde, Robert G Dalziel, Peter S Wasson, Venugopal Nair, Bernadette M Dutia, Pete Kaiser
Marek's disease virus (MDV) is an alphaherpesvirus that induces T-cell lymphomas in chickens. Natural infections in vivo are caused by the inhalation of infected poultry house dust and it is presumed that MDV infection is initiated in the macrophages from where the infection is passed to B cells and activated T cells. Virus can be detected in B and T cells and macrophages in vivo, and both B and T cells can be infected in vitro. However, attempts to infect macrophages in vitro have not been successful. The aim of this study was to develop a model for infecting phagocytes [macrophages and dendritic cells (DCs)] with MDV in vitro and to characterize the infected cells...
May 2017: Journal of General Virology
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