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https://www.readbyqxmd.com/read/27903800/genetic-variability-of-myxoma-virus-genomes
#1
Christoph Braun, Andrea Thürmer, Rolf Daniel, Anne-Kathrin Schultz, Ingo Bulla, Horst Schirrmeier, Dietmar Mayer, Andreas Neubert, Claus-Peter Czerny
: Myxomatosis is a recurrent problem on rabbit farms throughout Europe despite the success of vaccines. To identify gene variations of field and vaccine strains that may be responsible for changes in virulence, immunomodulation, and immunoprotection, the genomes of 6 Myxoma virus strains (MYXV) were sequenced: German field isolates Munich-1, FLI-H, 2604, 3207, vaccine strain MAV, and challenge strain ZA. The analyzed genomes ranged from 147.6 kb (strain MAV) to 161.8 kb (strain 3207) in size...
November 30, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27895186/correction-for-eduardo-correia-et-al-isg15-is-counteracted-by-vaccinia-virus-e3-protein-and-controls-the-proinflammatory-response-against-viral-infection
#2
Benedito Eduardo-Correia, Carles Martínez-Romero, Adolfo García-Sastre, Susana Guerra
No abstract text is available yet for this article.
December 15, 2016: Journal of Virology
https://www.readbyqxmd.com/read/27895177/ox40-cooperates-with-icos-to-amplify-follicular-th-cell-development-and-germinal-center-reactions-during-infection
#3
Vikas Tahiliani, Tarun E Hutchinson, Georges Abboud, Michael Croft, Shahram Salek-Ardakani
Cognate interactions between T follicular helper (Tfh) cells and B cells are essential for promoting protective Ab responses. Whereas costimulatory receptors such as ICOS are accepted as being important for the induction of Tfh cell fate decision, other molecules may play key roles in amplifying or maintaining the Tfh phenotype. In this study, with vaccinia virus infection in mice, we show that OX40 was expressed on Tfh cells that accumulated at the T/B borders in the white pulp of the spleen and that OX40-dependent signals directly shaped the magnitude and quality of the their response to viral Ags...
November 28, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/27892498/sensitization-with-vaccinia-virus-encoding-h5n1-hemagglutinin-restores-immune-potential-against-h5n1-influenza-virus
#4
Fumihiko Yasui, Yasushi Itoh, Ai Ikejiri, Masahiro Kitabatake, Nobuo Sakaguchi, Keisuke Munekata, Shintaro Shichinohe, Yukiko Hayashi, Hirohito Ishigaki, Misako Nakayama, Yoshihiro Sakoda, Hiroshi Kida, Kazumasa Ogasawara, Michinori Kohara
H5N1 highly pathogenic avian influenza (H5N1 HPAI) virus causes elevated mortality compared with seasonal influenza viruses like H1N1 pandemic influenza (H1N1 pdm) virus. We identified a mechanism associated with the severe symptoms seen with H5N1 HPAI virus infection. H5N1 HPAI virus infection induced a decrease of dendritic cell number in the splenic extrafollicular T-cell zone and impaired formation of the outer layers of B-cell follicles, resulting in insufficient levels of antibody production after infection...
November 28, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27883012/immune-signatures-of-protective-spleen-memory-cd8-t-cells
#5
Lilia Brinza, Sophia Djebali, Martine Tomkowiak, Julien Mafille, Céline Loiseau, Pierre-Emmanuel Jouve, Simon de Bernard, Laurent Buffat, Bruno Lina, Michèle Ottmann, Manuel Rosa-Calatrava, Stéphane Schicklin, Nathalie Bonnefoy, Grégoire Lauvau, Morgan Grau, Mélanie Wencker, Christophe Arpin, Thierry Walzer, Yann Leverrier, Jacqueline Marvel
Memory CD8 T lymphocyte populations are remarkably heterogeneous and differ in their ability to protect the host. In order to identify the whole range of qualities uniquely associated with protective memory cells we compared the gene expression signatures of two qualities of memory CD8 T cells sharing the same antigenic-specificity: protective (Influenza-induced, Flu-TM) and non-protective (peptide-induced, TIM) spleen memory CD8 T cells. Although Flu-TM and TIM express classical phenotypic memory markers and are polyfunctional, only Flu-TM protects against a lethal viral challenge...
November 24, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27876199/comparison-of-homologous-and-heterologous-prime-boost-immunizations-combining-mva-vectored-and-plant-derived-vp2-as-a-strategy-against-ibdv
#6
Matías Richetta, Evangelina Gómez, María Soledad Lucero, Silvina Chimeno Zoth, María José Gravisaco, Gabriela Calamante, Analía Berinstein
Different immunogens such as subunit, DNA or live viral-vectored vaccines against Infectious Bursal Disease virus (IBDV) have been evaluated in the last years. However, the heterologous prime-boost approach using recombinant modified vaccinia Ankara virus (rMVA), which has shown promising results in both mammals and chickens, has not been tried against this pathogen yet. IBD is a highly contagious and immunosuppressive disease of poultry that affects mainly young chicks. It is caused by IBDV, a double-stranded RNA virus carrying its main antigenic epitopes on the capsid protein VP2...
November 18, 2016: Vaccine
https://www.readbyqxmd.com/read/27873547/daily-ingestion-of-the-probiotic-lactobacillus-paracasei-st11-decreases-vaccinia-virus-dissemination-and-lethality-in-a-mouse-model
#7
A C Dos Santos Pereira Andrade, M Teixeira Lima, G Pereira Oliveira, R Silva Calixto, É Lorenna de Sales E Souza, D da Glória de Souza, C M de Almeida Leite, J M Siqueira Ferreira, E G Kroon, D Bretas de Oliveira, F Dos Santos Martins, J S Abrahão
Vaccinia virus (VACV) is an important pathogen. Although studies have shown relationships between probiotics and viruses, the effect of probiotics on VACV infection is unknown. Therefore, this work aims to investigate the probiotics effects on VACV infection. Mice were divided into four groups, two non-infected groups, one receiving the probiotic, the other one not receiving it, and two groups infected intranasally with VACV Western Reserve (VACV-WR) receiving or not receiving the probiotic. Viral titres in organs and cytokine production in the lungs were analysed...
November 22, 2016: Beneficial Microbes
https://www.readbyqxmd.com/read/27869601/detection-of-vaccinia-virus-in-dairy-cattle-serum-samples-from-2009-uruguay
#8
Ana Paula Moreira Franco-Luiz, Danilo Bretas Oliveira, Alexandre Fagundes Pereira, Mirela Cristina Soares Gasparini, Cláudio Antônio Bonjardim, Paulo César Peregrino Ferreira, Giliane de Souza Trindade, Rodrigo Puentes, Agustin Furtado, Jônatas Santos Abrahão, Erna Geessien Kroon
We detected orthopoxvirus in 28 of 125 serum samples collected during 2009 from cattle in Uruguay. Two samples were PCR-positive for vaccinia virus and had sequences similar to those for vaccinia virus associated with outbreaks in Brazil. Autochthonous circulation of vaccinia virus in Uruguay and other South American countries cannot be ruled out.
December 2016: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/27866320/protein-tyrosine-phosphatase-1b-inhibitory-properties-of-seco-cucurbitane-triterpenes-obtained-from-fruiting-bodies-of-russula-lepida
#9
Wilmar Maarisit, Hiroyuki Yamazaki, Syu-Ichi Kanno, Ayako Tomizawa, Jong-Soo Lee, Michio Namikoshi
The known seco-cucurbitane triterpene, (24E)-3,4-seco-cucurbita-4,24-diene-3,26,29-trioic acid (1), has been isolated as a potent protein tyrosine phosphatase (PTP) 1B inhibitor together with a new analogue, (24E)-3,4-seco-cucurbita-4,24-diene-3-hydroxy-26,29-dioic acid (2), from the fruiting bodies of Russula lepida. Further evaluation of their biological properties against PTPs revealed that compound 1 inhibited T-cell PTP activity similarly to PTP1B and exhibited moderate selectivity against PTP1B over vaccinia H-1-related phosphatase...
November 19, 2016: Journal of Natural Medicines
https://www.readbyqxmd.com/read/27865267/occurrence-of-pseudocowpox-virus-associated-to-bovine-viral-diarrhea-virus-1-brazilian-amazon
#10
Pedro A Alves, Poliana O Figueiredo, Cairo H S de Oliveira, José D Barbosa, Danillo H S Lima, Henrique A Bomjardim, Natália S Silva, Karinny F Campos, Carlos Magno C Oliveira, Edel Figueiredo Barbosa-Stancioli, Jônatas S Abrahão, Erna G Kroon, Giliane de Souza Trindade
In 2011, an outbreak of severe vesicular disease occurred in the state of Pará, Amazon region. Besides proliferative or verrucous lesions, cattle showed atypical clinical signs such as diarrhea and leading to death. The animals were submitted to clinical, pathological and molecular diagnosis, and laboratory tests have confirmed the presence of Pseudocowpox virus (PCPV), a Parapoxvirus genus member, and have also found Bovine viral diarrhea virus-1 (BVDV-1), probably causing persistent infection. The results of molecular diagnostics, followed by sequencing data demonstrated the circulation of both viruses (PCPV and BVDV-1) in an area previously affected by another poxvirus, as Vaccinia virus...
December 2016: Comparative Immunology, Microbiology and Infectious Diseases
https://www.readbyqxmd.com/read/27862195/vaccinia-virus-wr-induces-rapid-surface-expression-of-a-host-molecule-detected-by-the-antibody-4c7-that-is-distinct-from-clec2d
#11
Kinola J N Williams, Heather E Eaton, Lena Jones, Supraja Rengan, Deborah N Burshtyn
In this study we examined the effect of active infection with vaccinia virus Western Reserve (VACV WR) on expression of CLEC2D, a ligand of the human natural killer (NK) cell inhibitory receptor NKR-P1. As predicted, VACV infection leads to a loss of CLEC2D mRNA in 221 cells, a B cell lymphoma line. Surprisingly, VACV infection of 221 cells causes a dramatic increase in cell surface staining for one CLEC2D-specific antibody, 4C7. No change occurs with other antibodies specific for CLEC2D and there is no indication that NK cells with NKR-P1A are inhibited, suggesting 4C7 detects a non-CLEC2D molecule following infection...
November 15, 2016: Microbiology and Immunology
https://www.readbyqxmd.com/read/27857270/minimizing-hazards-associated-with-live-virus-immunotherapeutic-cancer-vaccines
#12
Sheri McMahon
Therapeutic cancer vaccines that use attenuated vaccinia viruses as delivery vectors are undergoing clinical trials at dozens of sites internationally. Even in an attenuated form, these live viruses can cause severe illness if they are accidentally transmitted to immunocompromised people, pregnant women, or people with certain skin conditions. Oncology nurses should become familiar with how to manage patients' vaccine injection sites to minimize these risks to patients' close contacts and the community at large...
December 1, 2016: Clinical Journal of Oncology Nursing
https://www.readbyqxmd.com/read/27853644/vectorization-in-an-oncolytic-vaccinia-virus-of-an-antibody-a-fab-and-a-scfv-against-programmed-cell-death-1-pd-1-allows-their-intratumoral-delivery-and-an-improved-tumor-growth-inhibition
#13
Patricia Kleinpeter, Laetitia Fend, Christine Thioudellet, Michel Geist, Nathalie Sfrontato, Véronique Koerper, Catherine Fahrner, Doris Schmitt, Murielle Gantzer, Christelle Remy-Ziller, Renée Brandely, Dominique Villeval, Karola Rittner, Nathalie Silvestre, Philippe Erbs, Laurence Zitvogel, Eric Quéméneur, Xavier Préville, Jean-Baptiste Marchand
We report here the successful vectorization of a hamster monoclonal IgG (namely J43) recognizing the murine Programmed cell death-1 (mPD-1) in Western Reserve (WR) oncolytic vaccinia virus. Three forms of mPD-1 binders have been inserted into the virus: whole antibody (mAb), Fragment antigen-binding (Fab) or single-chain variable fragment (scFv). MAb, Fab and scFv were produced and assembled with the expected patterns in supernatants of cells infected by the recombinant viruses. The three purified mPD-1 binders were able to block the binding of mPD-1 ligand to mPD-1 in vitro...
2016: Oncoimmunology
https://www.readbyqxmd.com/read/27845890/virus-inactivation-under-the-photodynamic-effect-of-phthalocyanine-zinc-ii-complexes
#14
Mimi Remichkova, Luchia Mukova, Lubomira Nikolaeva-Glomb, Nadya Nikolova, Lubka Doumanova, Vanya Mantareva, Ivan Angelov, Veselin Kussovski, Angel S Galabov
Various metal phthalocyanines have been studied for their capacity for photodynamic effects on viruses. Two newly synthesized water-soluble phthalocyanine Zn(II) complexes with different charges, cationic methylpyridyloxy-substituted Zn(II)- phthalocyanine (ZnPcMe) and anionic sulfophenoxy-substituted Zn(II)-phthalocyanine (ZnPcS), were used for photoinactivation of two DNA-containing enveloped viruses (herpes simplex virus type 1 and vaccinia virus), two RNA-containing enveloped viruses (bovine viral diarrhea virus and Newcastle disease virus) and two nude viruses (the enterovirus Coxsackie B1, a RNA-containing virus, and human adenovirus 5, a DNA virus)...
November 15, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27836975/a-conserved-tripeptide-sequence-at-the-c-terminus-of-the-poxvirus-dna-processivity-factor-d4-is-essential-for-protein-integrity-and-function
#15
Manunya Nuth, Hancheng Guan, Robert P Ricciardi
Vaccinia virus (VACV) is a poxvirus member, and the VACV D4 protein serves both as a uracil-DNA glycosylase (UDG) and as an essential component required for processive DNA synthesis. The VACV A20 protein has no known catalytic function itself, but associates with D4 to form the D4-A20 heterodimer that functions as the poxvirus DNA processivity factor. The heterodimer enables the DNA polymerase to efficiently synthesize extended strands of DNA. Upon characterizing the interaction between D4 and A20, we observed that the C-terminus of D4 is susceptible to perturbation...
November 11, 2016: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/27830736/viral-vector-vaccines-expressing-nucleoprotein-and-phosphoprotein-genes-of-avian-bornaviruses-ameliorate-homologous-challenge-infections-in-cockatiels-and-common-canaries
#16
Marita Olbert, Angela Römer-Oberdörfer, Christiane Herden, Sara Malberg, Solveig Runge, Peter Staeheli, Dennis Rubbenstroth
Avian bornaviruses are causative agents of proventricular dilatation disease (PDD), an often fatal disease of parrots and related species (order Psittaciformes) which is widely distributed in captive psittacine populations and may affect endangered species. Here, we established a vaccination strategy employing two different well described viral vectors, namely recombinant Newcastle disease virus (NDV) and modified vaccinia virus Ankara (MVA) that were engineered to express the phosphoprotein and nucleoprotein genes of two avian bornaviruses, parrot bornavirus 4 (PaBV-4) and canary bornavirus 2 (CnBV-2)...
November 10, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27829329/comparison-of-antibody-immune-responses-to-different-hiv-1-envelope-glycoprotein-mutants
#17
Jian-Dong Liu, Li Ren, Bin Ju, Wei Song, Xiang-Yang Ge, Kun-Xue Hong, Ying Liu, Wei Xu, Yan-Ling Hao, Yi-Ming Shao
The identification of immunogens is crucial for human immunodeficiency virus type 1 (HIV-1) vaccine development. In our previous study, we demonstrated that HIV-1 envelope glycoprotein mutants based on the equine infectious anemia virus (EIAV)attenuated vaccine enhance immunogenicity, both for DNA immunization alone and as a combined DNA prime-vaccinia boost immunization. An RV144 clinical trial has demonstrated that an envelope protein boost may provide some degree of protection against HIV-1 infection. In order to explore the antibody immune responses to two HIV-1 envelope glycoprotein mutants based on the EIAV vaccine and wild-type envelope glycoprotein, mice and guinea pigs were immunized using a DNA prime-protein boost immunization strategy...
November 8, 2016: Current HIV Research
https://www.readbyqxmd.com/read/27822522/local-action-with-global-impact-highly-similar-infection-patterns-of-human-viruses-and-bacteriophages
#18
Rachelle Mariano, Sawsan Khuri, Peter Uetz, Stefan Wuchty
The investigation of host-pathogen interaction interfaces and their constituent factors is crucial for our understanding of an organism's pathogenesis. Here, we explored the interactomes of HIV, hepatitis C virus, influenza A virus, human papillomavirus, herpes simplex virus, and vaccinia virus in a human host by analyzing the combined sets of virus targets and human genes that are required for viral infection. We also considered targets and required genes of bacteriophages lambda and T7 infection in Escherichia coli...
March 2016: MSystems
https://www.readbyqxmd.com/read/27817963/a-mva-construct-expressing-a-secretable-form-of-the-dengue-virus-3-envelope-protein-protects-immunized-mice-from-dengue-induced-encephalitis
#19
Bárbara R Quinan, Alice Freitas Versiani, Flávio G da Fonseca
Dengue is no longer restricted to tropical developing countries, but is now a major global public health problem. Despite the recent license approval of the CYD-TDV vaccine in some countries, efforts to develop a more efficient vaccine against Dengue virus (DENV) continue. Herein, we evaluate the immunogenicity and level of protection of two potential vaccines against DENV based on recombinant modified vaccinia virus Ankara (rMVA). The vaccine addressing the Envelope protein from DENV serotype 3 to the endoplasmic reticulum elicited neutralizing antibodies titers which correlate with protection, and also confers protection upon challenge in a mouse model...
December 7, 2016: Vaccine
https://www.readbyqxmd.com/read/27809679/induction-of-both-local-immune-response-in-mice-and-protection-in-a-rabbit-model-by-intranasal-immunization-with-modified-vaccinia-ankara-virus-expressing-a-secreted-form-of-bovine-herpesvirus-1-glycoprotein-d
#20
María Paula Del Medico Zajac, Flavia Adriana Zanetti, María Soledad Esusy, Carlos Rodolfo Federico, Osvaldo Zabal, Alejandro Rafael Valera, Gabriela Calamante
In this study, we evaluated the immunogenicity and efficacy of mucosal delivery of a recombinant modified vaccinia Ankara virus (MVA) expressing the secreted version of bovine herpesvirus type 1 (BoHV-1) glycoprotein D (MVA-gDs) without addition of adjuvant in two animal models. First, we demonstrated the capability of MVA-gDs of inducing both local and systemic anti-gD humoral immune response after intranasal immunization of mice. Then, we confirmed that two doses of MVA-gDs administered intranasally to rabbits induced systemic anti-gD antibodies and conferred protection against BoHV-1 challenge...
November 3, 2016: Viral Immunology
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