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https://www.readbyqxmd.com/read/29616414/complete-nucleotide-sequences-of-the-large-rna-genome-segments-of-main-drain-and-northway-viruses-family-peribunyaviridae
#1
Jermilia Charles, Chandra S Tangudu, Bradley J Blitvich
The large RNA genome segments of Main Drain virus (MDV) and Northway virus (NORV) were fully sequenced and shown to consist of 6860 and 6875 nucleotides, respectively. Sequence alignments revealed that the large RNA segment of MDV is most closely related to the corresponding region of NORV, with 76.8% nucleotide sequence identity, and the large RNA segment of NORV is most closely related to the corresponding region of Maguari virus, with 79.1% identity.
April 3, 2018: Archives of Virology
https://www.readbyqxmd.com/read/29615025/first-molecular-detection-and-characterization-of-marek-s-disease-virus-in-red-crowned-cranes-grus-japonensis-a-case-report
#2
Xue Lian, Xin Ming, Jiarong Xu, Wangkun Cheng, Xunhai Zhang, Hongjun Chen, Chan Ding, Yong-Sam Jung, Yingjuan Qian
BACKGROUND: Marek's disease virus (MDV) resides in the genus Mardivirus in the family Herpesviridae. MDV is a highly contagious virus that can cause neurological lesions, lymphocytic proliferation, immune suppression, and death in avian species, including Galliformes (chickens, quails, partridges, and pheasants), Strigiformes (owls), Anseriformes (ducks, geese, and swans), and Falconiformes (kestrels). CASE PRESENTATION: In 2015, two red-crowned cranes died in Nanjing (Jiangsu, China)...
April 3, 2018: BMC Veterinary Research
https://www.readbyqxmd.com/read/29604481/treatment-patterns-in-hyperlipidaemia-patients-based-on-administrative-claim-databases-in-japan
#3
Mayumi Wake, Yoshie Onishi, Florent Guelfucci, Akinori Oh, Shinzo Hiroi, Yukio Shimasaki, Tamio Teramoto
BACKGROUND AND AIMS: Real-world evidence on treatment of hyperlipidaemia (HLD) in Japan is limited. We aimed to describe treatment patterns, persistence with, and adherence to treatment in Japanese patients with HLD. METHODS: Retrospective analyses of adult HLD patients receiving drug therapy in 2014-2015 were conducted using the Japan Medical Data Center (JMDC) and Medical Data Vision (MDV) databases. Depending on their HLD treatment history, individuals were categorised as untreated (UT) or previously treated (PT), and were followed for at least 12 months...
March 16, 2018: Atherosclerosis
https://www.readbyqxmd.com/read/29587836/atrophy-of-primary-lymphoid-organs-induced-by-marek-s-disease-virus-during-early-infection-is-associated-with-increased-apoptosis-inhibition-of-cell-proliferation-and-a-severe-b-lymphopenia
#4
Camille Berthault, Thibaut Larcher, Sonja Härtle, Jean-François Vautherot, Laetitia Trapp-Fragnet, Caroline Denesvre
Marek's disease is a multi-faceted highly contagious disease affecting chickens caused by the Marek's disease alphaherpesvirus (MDV). MDV early infection induces a transient immunosuppression, which is associated with thymus and bursa of Fabricius atrophy. Little is known about the cellular processes involved in primary lymphoid organ atrophy. Here, by in situ TUNEL assay, we demonstrate that MDV infection results in a high level of apoptosis in the thymus and bursa of Fabricius, which is concomitant to the MDV lytic cycle...
March 27, 2018: Veterinary Research
https://www.readbyqxmd.com/read/29570417/reduction-of-marek-s-disease-virus-infection-by-toll-like-receptor-ligands-in-chicken-embryo-fibroblast-cells
#5
Jegarubee Bavananthasivam, Raveendra R Kulkarni, Leah Read, Shayan Sharif
Evolutionarily conserved pattern recognition receptors, including Toll-like receptors (TLRs) recognize pathogen-associated molecular patterns (PAMPs) that are present in microbes. PAMPs induce several pathways downstream of TLRs that lead to induction of antiviral responses. The objective of this study was to investigate the stimulatory effect of various PAMPs (in the form of TLR ligands) in reducing Marek's disease virus (MDV) infection in chicken embryo fibroblast cells (CEFs). To this end, CEFs were pretreated with Pam3CSK4, Poly(IC), lipopolysaccharide (LPS), and CpG ODN as TLR2, TLR3, TLR4, and TLR21 ligands, respectively for 24 h followed by infection with MDV...
March 23, 2018: Viral Immunology
https://www.readbyqxmd.com/read/29533078/development-of-reliable-techniques-for-the-differential-diagnosis-of-avian-tumour-viruses-by-immunohistochemistry-and-polymerase-chain-reaction-from-formalin-fixed-paraffin-embedded-tissue-sections
#6
Husnain Ahmed, Jody Mays, Matti Kiupel, John R Dunn
A variety of techniques have been developed as diagnostic tools for the differential diagnosis of tumours produced by Marek's disease virus (MDV) from those induced by avian leukosis virus (ALV) and reticuloendotheliosis virus (REV). However, most current techniques are unreliable when used in formalin-fixed paraffin embedded (FFPE) tissues, which many times is the only sample type available for definitive diagnosis. A collection of tumours was generated by the inoculation of different strains of MDV, REV or ALV singularly or in combination...
March 13, 2018: Avian Pathology: Journal of the W.V.P.A
https://www.readbyqxmd.com/read/29503113/h5n2-vaccine-viruses-on-russian-and-us-live-attenuated-influenza-virus-backbones-demonstrate-similar-infectivity-immunogenicity-and-protection-in-ferrets
#7
Rita Czakó, Leatrice Vogel, Troy Sutton, Yumiko Matsuoka, Florian Krammer, Zhongying Chen, Hong Jin, Kanta Subbarao
The continued detection of zoonotic influenza infections, most notably due to the avian influenza A H5N1 and H7N9 subtypes, underscores the need for pandemic preparedness. Decades of experience with live attenuated influenza vaccines (LAIVs) for the control of seasonal influenza support the safety and effectiveness of this vaccine platform. All LAIV candidates are derived from one of two licensed master donor viruses (MDVs), cold-adapted (ca) A/Ann Arbor/6/60 or ca A/Leningrad/134/17/57. A number of LAIV candidates targeting avian H5 influenza viruses derived with each MDV have been evaluated in humans, but have differed in their infectivity and immunogenicity...
March 1, 2018: Vaccine
https://www.readbyqxmd.com/read/29500201/risk-of-pneumococcal-diseases-in-adults-with-underlying-medical-conditions-a-retrospective-cohort-study-using-two-japanese-healthcare-databases
#8
Kentaro Imai, Tanaz Petigara, Melvin A Kohn, Kei Nakashima, Masahiro Aoshima, Akihito Shito, Shinichi Kanazu
OBJECTIVES: To quantify the risk of pneumococcal pneumonia (PP) and invasive pneumococcal disease (IPD) in adults aged ≥19 years with underlying medical conditions compared with healthy adults of the same age in Japan. DESIGN: An observational, retrospective, cohort study using two healthcare claims databases in Japan: Japan Medical Data Center (JMDC) and Medical Data Vision (MDV) databases. PARTICIPANTS: A total of 10.4 million individuals, representing 9...
March 2, 2018: BMJ Open
https://www.readbyqxmd.com/read/29476761/loop-mediated-isothermal-amplification-assay-for-detection-of-four-immunosuppressive-viruses-in-chicken
#9
HyeSoon Song, YouChan Bae, SeokChan Park, HyukMan Kwon, HeeSoo Lee, SeongJoon Joh
Loop-mediated isothermal amplification (LAMP) methods to detect chicken infectious anemia virus (CIAV), reticuloendotheliosis virus (REV), and Marek's disease virus (MDV), and a reverse transcription (RT)-LAMP assay to detect infectious bursal disease virus (IBDV), were developed. The CIAV-LAMP, REV-LAMP, MDV-LAMP, and IBDV-RT-LAMP methods were performed using four sets of six primers targeting the VP1 gene of CIAV, the gp90 gene of REV, the Meq gene of MDV, and the VP2 gene of IBDV. The results (a change in color) were observed visually...
February 21, 2018: Journal of Virological Methods
https://www.readbyqxmd.com/read/29458534/specific-transcriptional-and-post-transcriptional-regulation-of-the-major-immediate-early-icp4-gene-of-gahv-2-during-the-lytic-latent-and-reactivation-phases
#10
Perrine Rasschaert, Isabelle Gennart, Imane Boumart, Ginette Dambrine, Benoit Muylkens, Denis Rasschaert, Sylvie Laurent
Transcriptional and post-transcriptional mechanisms are involved in the switch between the lytic, latent and reactivation phases of the viral cycle in herpesviruses. During the productive phases, herpesvirus gene expression is characterized by a temporally regulated cascade of immediate early (IE), early (E) and late (L) genes. In alphaherpesviruses, the major product of the IE ICP4 gene is a transcriptional regulator that initiates the cascade of gene expression that is essential for viral replication. In this study, we redefine the infected cell protein 4 (ICP4) gene of the oncogenic Marek's disease virus (MDV or gallid herpesvirus 2) as a 9438 nt gene ended with four alternative poly(A) signals and controlled by two alternative promoters containing essentially ubiquitous functional response elements (GC, TATA and CCAAT boxes)...
January 22, 2018: Journal of General Virology
https://www.readbyqxmd.com/read/29423087/design-of-mirna-sponges-for-mdv-1-as-a-therapeutic-strategy-against-lymphomas
#11
Yuan Fang, Yuqi Zhou, Yun Zhang, Liangliang He, Chunyi Xue, Yongchang Cao
Lymphomas are solid-type tumors containing lymphoid cells. Some of latent herpesvirus infections established in B and/or T-lymphocytes could result in the formation of lymphomas. Marek's disease virus serotype 1 (MDV-1) is an avian herpes virus causing to lymphoproliferative tumors in birds, known as Marek's disease (MD). MD has often been used as an ideal biological model for studying the pathogenesis of lymphoma diseases caused by viruses. Therefore, we used it as a research subject to study the effect of miRNA sponges on its tumorigenicity, and to develop the theoretical basis for a new anti-tumor small molecule...
January 9, 2018: Oncotarget
https://www.readbyqxmd.com/read/29407380/attenuation-of-marek-s-disease-virus-by-codon-pair-deoptimization-of-a-core-gene
#12
Steven J Conrad, Robert F Silva, Cari J Hearn, Megan Climans, John R Dunn
Marek's disease virus (MDV) is an oncogenic alphaherpesvirus of Gallus gallus, the domesticated chicken. Control strategies rely upon vaccination with live attenuated viruses of antigenically similar avian herpesviruses or attenuated strains of MDV. Recent studies in other viruses have shown that recoding certain viral genes to employ synonymous but rarely-used codon pairs resulted in viral attenuation. We deoptimized two MDV proteins, UL54/ICP27 and UL49/VP22, and demonstrate that the more severely deoptimized variant of UL54 accumulates significantly less gene product in vitro...
February 1, 2018: Virology
https://www.readbyqxmd.com/read/29407378/phylogenetic-and-molecular-epidemiological-studies-reveal-evidence-of-recombination-among-marek-s-disease-viruses
#13
Liangliang He, Jie Li, Yun Zhang, Jun Luo, Yongchang Cao, Chunyi Xue
Marek's disease has brought enormous loss in chicken production worldwide and the increasing virulence of Marek's disease virus (MDV) became a severe problem. To better understand the genetic basis underlying, a Chinese MDV strain HNGS101 isolated from immunized chickens was sequenced. Phylogenetic analysis implied that HNGS101 showed more relatedness to Eurasian strains than GaHV-2 circulating in North America. Recombination networks analysis showed the evidence of recombination among MDV strains, and several recombination events in the UL and US region were found...
January 31, 2018: Virology
https://www.readbyqxmd.com/read/29377958/attenuation-of-a-very-virulent-marek-s-disease-herpesvirus-mdv-by-codon-pair-bias-deoptimization
#14
Kathrin Eschke, Jakob Trimpert, Nikolaus Osterrieder, Dusan Kunec
Codon pair bias deoptimization (CPBD) has enabled highly efficient and rapid attenuation of RNA viruses. The technique relies on recoding of viral genes by increasing the number of codon pairs that are statistically underrepresented in protein coding genes of the viral host without changing the amino acid sequence of the encoded proteins. Utilization of naturally underrepresented codon pairs reduces protein production of recoded genes and directly causes virus attenuation. As a result, the mutant virus is antigenically identical with the parental virus, but virulence is reduced or absent...
January 29, 2018: PLoS Pathogens
https://www.readbyqxmd.com/read/29366873/modeling-marek-s-disease-virus-transmission-a-framework-for-evaluating-the-impact-of-farming-practices-and-evolution
#15
David A Kennedy, Patricia A Dunn, Andrew F Read
Marek's disease virus (MDV) is a pathogen of chickens whose control has twice been undermined by pathogen evolution. Disease ecology is believed to be the main driver of this evolution, yet mathematical models of MDV disease ecology have never been confronted with data to test their reliability. Here, we develop a suite of MDV models that differ in the ecological mechanisms they include. We fit these models with maximum likelihood using iterated filtering in 'pomp' to data on MDV concentration in dust collected from two commercial broiler farms...
January 10, 2018: Epidemics
https://www.readbyqxmd.com/read/29331866/development-of-a-novel-equine-influenza-virus-live-attenuated-vaccine
#16
Laura Rodriguez, Stephanie Reedy, Aitor Nogales, Pablo R Murcia, Thomas M Chambers, Luis Martinez-Sobrido
H3N8 equine influenza virus (EIV) is an important and significant respiratory pathogen of horses. EIV is enzootic in Europe and North America, mainly due to the suboptimal efficacy of current vaccines. We describe, for the first time, the generation of a temperature sensitive (ts) H3N8 EIV live-attenuated influenza vaccine (LAIV) using reverse-genetics approaches. Our EIV LAIV was attenuated (att) in vivo and able to induce, upon a single intranasal administration, protection against H3N8 EIV wild-type (WT) challenge in both a mouse model and the natural host, the horse...
March 2018: Virology
https://www.readbyqxmd.com/read/29317752/epstein-barr-virus-encoded-rnas-ebers-complement-the-loss-of-herpesvirus-telomerase-rna-vtr-in-virus-induced-tumor-formation
#17
Ahmed Kheimar, Benedikt B Kaufer
Marek's disease virus (MDV) is an alphaherpesvirus that causes fatal lymphomas in chickens and is used as a natural virus-host model for herpesvirus-induced tumorigenesis. MDV encodes a telomerase RNA subunit (vTR) that is crucial for efficient MDV-induced lymphoma formation; however, the mechanism is not completely understood. Similarly, Epstein Barr-virus (EBV) encodes two RNAs (EBER-1 and EBER-2) that are highly expressed in EBV-induced tumor cells, however their role in tumorigenesis remains unclear. Intriguingly, vTR and EBER-1 have interaction partners in common that are highly conserved in humans and chickens...
January 9, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29249067/detection-of-angiographically-significant-coronary-obstruction-using-resting-transthoracic-coronary-doppler-echocardiography
#18
Alberto Cozzarin, Gerardo Manuel Marambio, Daniel Ernesto Ferreiro, Maria Fernanda Gonda, Lorena Romina Balletti, Martin Hernán Medawar, Juan Alberto Gagliardi, Tomás Francisco Cianciulli
BACKGROUND: Transesophageal Doppler echocardiography has shown that significant stenosis can be detected based on the presence of aliasing with color Doppler in the stenotic area. The study aimed to assess the detection of angiographically significant coronary stenosis (ASCS) by analyzing the characteristics and velocities of resting coronary artery flow (RCF) using transthoracic coronary Doppler echocardiography (TCDE). METHODS: TCDE was performed before diagnostic coronary angiography (CA)...
December 16, 2017: Journal of Echocardiography
https://www.readbyqxmd.com/read/29151863/a-phylogenomic-analysis-of-marek-s-disease-virus-reveals-independent-paths-to-virulence-in-eurasia-and-north-america
#19
Jakob Trimpert, Nicole Groenke, Maria Jenckel, Shulin He, Dusan Kunec, Moriah L Szpara, Stephen J Spatz, Nikolaus Osterrieder, Dino P McMahon
Virulence determines the impact a pathogen has on the fitness of its host, yet current understanding of the evolutionary origins and causes of virulence of many pathogens is surprisingly incomplete. Here, we explore the evolution of Marek's disease virus (MDV), a herpesvirus commonly afflicting chickens and rarely other avian species. The history of MDV in the 20th century represents an important case study in the evolution of virulence. The severity of MDV infection in chickens has been rising steadily since the adoption of intensive farming techniques and vaccination programs in the 1950s and 1970s, respectively...
December 2017: Evolutionary Applications
https://www.readbyqxmd.com/read/29091922/characterization-of-the-deubiquitination-activity-and-substrate-specificity-of-the-chicken-ubiquitin-specific-protease-1-usp-associated-factor-1-complex
#20
Hainan Zheng, Mengyun Wang, Chengcheng Zhao, Shanli Wu, Peifeng Yu, Yan Lü, Tiedong Wang, Yongxing Ai
Deubiquitinases (DUBs) are essential regulators of intracellular processes involving ubiquitin (Ub) modification. The human DUB ubiquitin-specific protease 1 (hUSP1) interacts with human USP-associated factor 1 (hUAF1), and helps to regulate processes such as DNA damage repair. Previously, we identified a chicken USP1 homologue (chUSP1) during an investigation into the properties of Marek's disease virus (MDV). However, chUSP1's deubiquitination activity, interaction with chUAF1, and substrate specificity remained unknown...
2017: PloS One
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