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https://www.readbyqxmd.com/read/28098542/detection-of-vaccinia-virus-in-urban-domestic-cats-brazil
#1
Galileu Barbosa Costa, Júlia Bahia Miranda, Gregório Guilherme Almeida, Jaqueline Silva de Oliveira, Mariana Siqueira Pinheiro, Stefanne Aparecida Gonçalves, Jenner Karlisson Pimenta Dos Reis, Ricardo Gonçalves, Paulo César Peregrino Ferreira, Cláudio Antônio Bonjardim, Jônatas Santos Abrahão, Erna Geessien Kroon, Giliane de Souza Trindade
We investigated possible vaccinia virus (VACV) in urban house cats in Brazil. Serum samples from 6 cats were positive for VACV by PCR, indicating likely VACV circulation among house cats in urban areas of Brazil. This finding highlights the importance of epidemiologic surveillance to avoid outbreaks among urban human populations.
February 2017: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/28081250/cutaneous-deficiency-of-filaggrin-and-stat3-exacerbates-vaccinia-disease-in-vivo
#2
Yong He, Ishrat Sultana, Kazuyo Takeda, Jennifer L Reed
RATIONALE: Defects in filaggrin and STAT3 are associated with atopic dermatitis (AD) and susceptibility to severe skin infection. METHODS: We evaluated skin infection with the current smallpox vaccine, ACAM-2000, in immunosuppressed mice with combined cutaneous deficiency in filaggrin and STAT3. In parallel, early events post-infection with ACAM-2000 were investigated in cultured keratinocytes in which filaggrin expression was knocked down via siRNA. RESULTS: Immunosuppressed, filaggrin-deficient mice, treated with the topical STAT3 inhibitor Stattic® prior to ACAM-2000 infection, demonstrated rapid weight loss, prolonged vaccinia burden in skin, and dermatitis...
2017: PloS One
https://www.readbyqxmd.com/read/28079473/protective-immunity-against-influenza-in-hla-a2-transgenic-mice-by-modified-vaccinia-virus-ankara-vectored-vaccines-containing-internal-influenza-proteins
#3
Giuseppina Di Mario, Ester Sciaraffia, Marzia Facchini, Francesco Gubinelli, Elisa Soprana, Maddalena Panigada, Valentina Bernasconi, Bruno Garulli, Antonio Siccardi, Isabella Donatelli, Maria R Castrucci
BACKGROUND: The emergence of novel strains of influenza A viruses with hemagglutinins (HAs) that are antigenically distinct from those circulating in humans, and thus have pandemic potential, pose concerns and call for the development of more broadly protective influenza vaccines. In the present study, modified vaccinia virus Ankara (MVA) encoding internal influenza antigens were evaluated for their immunogenicity and ability to protect HLA-A2.1 transgenic (AAD) mice from infection with influenza viruses...
January 12, 2017: Pathogens and Global Health
https://www.readbyqxmd.com/read/28067508/coherent-brightfield-microscopy-provides-the-spatiotemporal-resolution-to-study-early-stage-viral-infection-in-live-cells
#4
Yi-Fan Huang, Guan-Yu Zhuo, Chun-Yu Chou, Cheng-Hao Lin, Wen Chang, Chia-Lung Hsieh
Viral infection starts with a virus particle landing on a cell surface followed by penetration of the plasma membrane. Due to the difficulty of measuring the rapid motion of small-sized virus particles on the membrane, little is known about how a virus particle reaches an endocytic site after landing at a random location. Here, we use coherent brightfield (COBRI) microscopy to investigate early stage viral infection with ultrahigh spatiotemporal resolution. By detecting intrinsic scattered light via imaging-based interferometry, COBRI microscopy allows us to track the motion of a single vaccinia virus particle with nanometer spatial precision (<3 nm) in 3D and microsecond temporal resolution (up to 100,000 frames per second)...
January 13, 2017: ACS Nano
https://www.readbyqxmd.com/read/28063045/induction-and-analysis-of-bronchus-associated-lymphoid-tissue
#5
Henrike Fleige, Reinhold Förster
Bronchus-associated lymphoid tissue (BALT) forms spontaneously in the lung after pulmonary infection and has been identified as a highly organized lymphoid structure supporting the efficient priming of T cells in the lung. To explore the mechanisms and instructive signals controlling BALT neogenesis we used both, a single dose of vaccinia virus MVA and repeated inhalations of heat-inactivated Pseudomonas aeruginosa (P. aeruginosa). Intranasal administration of both pathogens induces highly organized BALT but distinct pathways and molecules are used to promote the development of BALT...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28060410/preparation-of-cell-cultures-and-vaccinia-virus-stocks
#6
Catherine A Cotter, Patricia L Earl, Linda S Wyatt, Bernard Moss
The culturing of cell lines used with vaccinia virus, both as monolayer and in suspension, is described. The preparation of chick embryo fibroblasts (CEF) is presented for use in the production of the highly attenuated and host range-restricted modified vaccinia virus Ankara (MVA) strain of vaccinia virus. Protocols for the preparation, titration, and trypsinization of vaccinia virus stocks, as well as viral DNA preparation and virus purification methods are also included. © 2017 by John Wiley & Sons, Inc.
January 5, 2017: Current Protocols in Molecular Biology
https://www.readbyqxmd.com/read/28060405/generation-of-recombinant-vaccinia-viruses
#7
Linda S Wyatt, Patricia L Earl, Bernard Moss
This unit describes how to infect cells with vaccinia virus and then transfect them with a plasmid-transfer vector or PCR fragment to generate a recombinant virus. Selection and screening methods used to isolate recombinant viruses and a method for the amplification of recombinant viruses are described. Finally, a method for live immunostaining that has been used primarily for detection of recombinant modified vaccinia virus Ankara (MVA) is presented. © 2017 by John Wiley & Sons, Inc.
January 5, 2017: Current Protocols in Molecular Biology
https://www.readbyqxmd.com/read/28060376/induction-of-necroptotic-cell-death-by-viral-activation-of-the-rig-i-or-sting-pathway
#8
Suruchi N Schock, Neha V Chandra, Yuefang Sun, Takashi Irie, Yoshinori Kitagawa, Bin Gotoh, Laurent Coscoy, Astar Winoto
Necroptosis is a form of necrotic cell death that requires the activity of the death domain-containing kinase RIP1 and its family member RIP3. Necroptosis occurs when RIP1 is deubiquitinated to form a complex with RIP3 in cells deficient in the death receptor adapter molecule FADD or caspase-8. Necroptosis may play a role in host defense during viral infection as viruses like vaccinia can induce necroptosis while murine cytomegalovirus encodes a viral inhibitor of necroptosis. To see how general the interplay between viruses and necroptosis is, we surveyed seven different viruses...
January 6, 2017: Cell Death and Differentiation
https://www.readbyqxmd.com/read/28057259/modified-vaccinia-virus-ankara-history-value-in-basic-research-and-current-perspectives-for-vaccine-development
#9
REVIEW
A Volz, G Sutter
Safety tested Modified Vaccinia virus Ankara (MVA) is licensed as third-generation vaccine against smallpox and serves as a potent vector system for development of new candidate vaccines against infectious diseases and cancer. Historically, MVA was developed by serial tissue culture passage in primary chicken cells of vaccinia virus strain Ankara, and clinically used to avoid the undesirable side effects of conventional smallpox vaccination. Adapted to growth in avian cells MVA lost the ability to replicate in mammalian hosts and lacks many of the genes orthopoxviruses use to conquer their host (cell) environment...
2017: Advances in Virus Research
https://www.readbyqxmd.com/read/28046039/humoral-immunity-to-primary-smallpox-vaccination-impact-of-childhood-versus-adult-immunization-on-vaccinia-vector-vaccine-development-in-military-populations
#10
Bonnie M Slike, Matthew Creegan, Mary Marovich, Viseth Ngauy
Modified Vaccinia virus has been shown to be a safe and immunogenic vector platform for delivery of HIV vaccines. Use of this vector is of particular importance to the military, with the implementation of a large scale smallpox vaccination campaign in 2002 in active duty and key civilian personnel in response to potential bioterrorist activities. Humoral immunity to smallpox vaccination was previously shown to be long lasting (up to 75 years) and protective. However, using vaccinia-vectored vaccine delivery for other diseases on a background of anti-vector antibodies (i...
2017: PloS One
https://www.readbyqxmd.com/read/28031267/assessment-of-the-plasmodium-falciparum-pre-erythrocytic-antigen-uis3-as-a-potential-candidate-for-a-malaria-vaccine
#11
Rhea J Longley, Benedict R Halbroth, Ahmed M Salman, Katie J Ewer, Susanne H Hodgson, Chris J Janse, Shahid M Khan, Adrian V S Hill, Alexandra J Spencer
Efforts are currently underway to improve the efficacy of sub-unit malaria vaccines through assessment of new adjuvants, vaccination platforms and antigens. In this study, we further assess the antigen P. falciparum (Pf) upregulated in infective sporozoites 3 (PfUIS3) as a vaccine candidate. PfUIS3 was expressed in the viral vectors chimpanzee adenovirus 63 (ChAd63) and modified vaccinia virus Ankara (MVA) and used to immunize mice in a prime-boost regimen. We previously demonstrated that this regimen could provide partial protection against challenge with chimeric P...
December 28, 2016: Infection and Immunity
https://www.readbyqxmd.com/read/28029542/vector-based-genetically-modified-vaccines-exploiting-jenner-s-legacy
#12
Bahar Ramezanpour, Ingrid Haan, Ab Osterhaus, Eric Claassen
The global vaccine market is diverse while facing a plethora of novel developments. Genetic modification (GM) techniques facilitate the design of 'smarter' vaccines. For many of the major infectious diseases of humans, like AIDS and malaria, but also for most human neoplastic disorders, still no vaccines are available. It may be speculated that novel GM technologies will significantly contribute to their development. While a promising number of studies is conducted on GM vaccines and GM vaccine technologies, the contribution of GM technology to newly introduced vaccines on the market is disappointingly limited...
October 28, 2016: Vaccine
https://www.readbyqxmd.com/read/28027665/three-year-durability-of-immune-responses-induced-by-hiv-dna-and-hiv-modified-vaccinia-virus-ankara-and-effect-of-a-late-hiv-mva-boost-in-tanzanian-volunteers
#13
Agricola Joachim, Patricia J Munseri, Charlotta Nilsson, Muhammad Bakari, Said Aboud, Eligius F Lyamuya, Teghesti Tecleab, Valentina Liakina, Gabriella Scarlatti, Merlin Robb, Patricia Earl, Bernard Moss, Britta Wahren, Fred Mhalu, Guido Ferarri, Eric Sandström, Gunnel Biberfeld
We explored the duration of immune responses and the effect of a late third HIV-modified vaccinia virus Ankara (MVA) boost in HIV-DNA primed and HIV-MVA boosted Tanzanian volunteers. Twenty volunteers who had previously received three HIV-DNA and two HIV-MVA immunizations were given a third HIV-MVA immunization three years after the second HIV-MVA boost. At the time of the third HIV-MVA, 90% of the vaccinees had antibodies to HIV-1 subtype C gp140 (median titer 200) and 85% to subtype B gp160 (median titer 100)...
December 27, 2016: AIDS Research and Human Retroviruses
https://www.readbyqxmd.com/read/28017426/viral-vector-vaccines-protect-cockatiels-from-inflammatory-lesions-after-heterologous-parrot-bornavirus-2-challenge-infection
#14
Solveig Runge, Marita Olbert, Christiane Herden, Sara Malberg, Angela Römer-Oberdörfer, Peter Staeheli, Dennis Rubbenstroth
Avian bornaviruses are causative agents of proventricular dilatation disease (PDD), a chronic neurologic and often fatal disorder of psittacines including endangered species. To date no causative therapy or immunoprophylaxis is available. Our previous work has shown that viral vector vaccines can delay the course of homologous bornavirus challenge infections but failed to protect against PDD when persistent infection was not prevented. The goal of this study was to refine our avian bornavirus vaccination and infection model to better represent natural bornavirus infections in order to achieve full protection against a heterologous challenge infection...
December 22, 2016: Vaccine
https://www.readbyqxmd.com/read/28012777/sequential-administration-of-a-mva-based-muc1-cancer-vaccine-and-the-tlr9-ligand-litenimod-li28-improves-local-immune-defense-against-tumors
#15
Emmanuelle Schaedler, Christelle Remy-Ziller, Julie Hortelano, Nadine Kehrer, Marie-Christine Claudepierre, Tanja Gatard, Christopher Jakobs, Xavier Préville, Antoine F Carpentier, Karola Rittner
TG4010 is an immunotherapeutic vaccine based on Modified Vaccinia virus Ankara (MVA) encoding the human tumor-associated antigen MUC1 and human IL-2. In combination with first-line standard of care chemotherapy in advanced metastatic non-small-cell lung cancer (NSCLC), repeated subcutaneous injection of TG4010 improved progression-free survival in phase 2b clinical trials. In preclinical tumor models, MVATG9931, the research version of TG4010, conferred antigen-specific responses against the weak antigen human MUC1...
December 21, 2016: Vaccine
https://www.readbyqxmd.com/read/28004418/sublingual-immunization-with-japanese-encephalitis-virus-vaccines-induces-effective-immunity-through-both-cellular-and-humoral-immune-responses-in-mice
#16
Eun-Young Lee, Joo-Young Kim, Deuk-Ki Lee, Il-Sub Yoon, Hae Li Ko, Ji-Woo Chung, Jun Chang, Jae-Hwan Nam
The Japanese encephalitis virus (JEV) is the leading cause of viral encephalitis. Although there are four classes of vaccines against JEV, the immunization routes for all vaccines are subcutaneous or intramuscular injection. In here, we investigated the effectiveness of sublingual administration of the JEV live-attenuated vaccine or the recombinant modified vaccinia virus Ankara (MVA) vaccine including JEV prM/E. The mice were immunized three times intramuscularly (i.m.) or sublingually (s.l.). One week after the final immunization by both s...
December 22, 2016: Microbiology and Immunology
https://www.readbyqxmd.com/read/28003488/ribosome-profiling-reveals-translational-upregulation-of-cellular-oxidative-phosphorylation-mrnas-during-vaccinia-virus-induced-host-shutoff
#17
Aimei Dai, Shuai Cao, Pragyesh Dhungel, Yizhao Luan, Yizhi Liu, Zhi Xie, Zhilong Yang
: Vaccinia virus infection causes a host shutoff, which is marked by global inhibition of host protein synthesis. Though the host shutoff may facilitate reallocation of cellular resources for viral replication and evasion of host anti-viral immune responses, it poses a challenge for continuous synthesis of cellular proteins that are important for viral replication. It is, however, unclear whether and how certain cellular proteins may be selectively synthesized during the vaccinia virus-induced host shutoff...
December 21, 2016: Journal of Virology
https://www.readbyqxmd.com/read/28003378/chronic-type-i-ifn-is-sufficient-to-promote-immunosuppression-through-accumulation-of-myeloid-derived-suppressor-cells
#18
Kahina Taleb, Cédric Auffray, Pascale Villefroy, Adrien Pereira, Anne Hosmalin, Muriel Gaudry, Agnès Le Bon
Failure of the immune system to eradicate viruses results in chronic viral infections, which are associated with increased susceptibility to secondary infections. Pathogenic HIV or lymphocytic choriomeningitis virus chronic infections display a persistent type I IFN signature. In chronic lymphocytic choriomeningitis virus infection, blockade of type I IFN signaling partially restores antiviral responses. In a mouse model, we tested whether chronic administration of type I IFN, at doses mimicking chronic viral infection, induced immunosuppression...
December 21, 2016: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28003150/concomitant-helminth-infection-downmodulates-the-vaccinia-virus-specific-immune-response-and-potentiates-virus-associated-pathology
#19
Pedro Henrique Gazzinelli-Guimarães, Lorena Falabella Daher de Freitas, Ana Clara Gazzinelli-Guimarães, Fabiana Coelho, Fernando Sérgio Barbosa, Denise Nogueira, Chiara Amorim, Lucas de Carvalho Dhom-Lemos, Luciana Maria Oliveira, Alexandre Barcelos da Silveira, Flávio Guimarães da Fonseca, Lilian Lacerda Bueno, Ricardo Toshio Fujiwara
The aim of this work was to elucidate the immunopathological mechanisms of how helminths may influence the course of a viral infection, using a murine model. Severe virulence, a relevant increase in the virus titres in the lung and a higher mortality rate were observed in Ascaris and Vaccinia virus (VACV) co-infected mice, compared with VACV mono-infected mice. Immunopathological analysis suggested that the ablation of CD8(+) T cells, the marked reduction of circulating CD4(+) T cells producing IFN-γ, and the robust pulmonary inflammation were associated with the increase of morbidity/mortality in co-infection and subsequently with the negative impact of concomitant pulmonary ascariasis and respiratory VACV infection for the host...
December 18, 2016: International Journal for Parasitology
https://www.readbyqxmd.com/read/28000080/a-bioinformatics-pipeline-to-search-functional-motifs-within-whole-proteome-data-a-case-study-of-poxviruses
#20
Haitham Sobhy
Proteins harbor domains or short linear motifs, which facilitate their functions and interactions. Finding functional motifs in protein sequences could predict the putative cellular roles or characteristics of hypothetical proteins. In this study, we present Shetti-Motif, which is an interactive tool to (i) map UniProt and PROSITE flat files, (ii) search for multiple pre-defined consensus patterns or experimentally validated functional motifs in large datasets protein sequences (proteome-wide), (iii) search for motifs containing repeated residues (low-complexity regions, e...
December 20, 2016: Virus Genes
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