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https://www.readbyqxmd.com/read/28797124/preclinical-development-of-a-vaccine-against-oligomeric-alpha-synuclein-based-on-virus-like-particles
#1
Marika Doucet, Aadil El-Turabi, Franziska Zabel, Benjamin H M Hunn, Nora Bengoa-Vergniory, Milena Cioroch, Mauricio Ramm, Amy M Smith, Ariane Cruz Gomes, Gustavo Cabral de Miranda, Richard Wade-Martins, Martin F Bachmann
Parkinson's disease (PD) is a progressive and currently incurable neurological disorder characterised by the loss of midbrain dopaminergic neurons and the accumulation of aggregated alpha-synuclein (a-syn). Oligomeric a-syn is proposed to play a central role in spreading protein aggregation in the brain with associated cellular toxicity contributing to a progressive neurological decline. For this reason, a-syn oligomers have attracted interest as therapeutic targets for neurodegenerative conditions such as PD and other alpha-synucleinopathies...
2017: PloS One
https://www.readbyqxmd.com/read/28794181/a-neutralization-assay-for-zika-and-dengue-viruses-using-a-real-time-pcr-based-endpoint-assessment
#2
Heather L Wilson, Thomas Tran, Julian Druce, Myrielle Dupont-Rouzeyrol, Michael Catton
The global spread and infective complications of Zika virus (ZKV) and Dengue virus (DENV) have made them flaviviruses of public health concern. Serological diagnosis can be challenging due to antibody cross-reactivity, particularly in secondary flavivirus infections or when there is a history of flavivirus vaccination. The virus neutralization assay is considered to be the most specific assay for measurement of anti-flavivirus antibodies. This study describes an assay where neutralization endpoint is measured by real-time PCR, providing results within 72 hours...
August 9, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28789849/protective-effects-of-high-potency-fmdv-o1-manisa-monovalent-vaccine-in-cattle-challenged-with-fmdv-o-skr-2010-at-7-or-4-days-post-vaccination
#3
Jacquelyn Horsington, Claudia Beascoechea Perez, Eduardo Maradei, Sabrina Galdo Novo, Jose L Gonzales, Nagendrakumar B Singanallur, Paula Bonastre, Wilna Vosloo
Serotype O foot-and-mouth disease (FMD) virus belonging to the SEA topotype continues to be a significant problem in the Eastern Asia region, with outbreaks in Japan and South Korea resulting in the culling of over 3.5 million cattle and pigs in recent years. High-potency O1 Manisa vaccine was previously shown to provide protection in cattle 21days post vaccination (dpv) following challenge with a representative virus, O/SKR/2010. This study tested the ability of the O1 Manisa vaccine to protect cattle from infection and disease with the O/SKR/2010 virus within just 4 or 7days post vaccination...
August 5, 2017: Vaccine
https://www.readbyqxmd.com/read/28780422/efficacy-of-a-high-potency-o1-manisa-monovalent-vaccine-against-heterologous-challenge-with-foot-and-mouth-disease-virus-of-o-sea-mya-98-lineage-in-sheep
#4
N B Singanallur, J M Pacheco, J Arzt, C Stenfeldt, G T Fosgate, L Rodriguez, W Vosloo
Potency tests for commercial oil-adjuvanted foot-and-mouth disease (FMD) vaccines are usually carried out in cattle, using a full dose (2 ml) of vaccine and homologous virus challenge. However, in sheep the recommended vaccine dose is half of the cattle dose (1 ml) and most vaccines have not been potency tested for this species, especially with heterologous viruses. To determine the efficacy of a high potency (>6PD50) FMD virus (FMDV) O1Manisa vaccine in sheep, we carried out a study using a heterologous FMDV (FMDV O/SKR/2010 - Mya-98 strain) challenge...
August 3, 2017: Antiviral Research
https://www.readbyqxmd.com/read/28767977/clinical-and-serological-tests-for-arboviruses-in-free-living-domestic-pigeons-columba-livia
#5
Bruna Alves Ramos, Jannifer Oliveira Chiang, Lívia Carício Martins, Liliane Leal das Chagas, Franko de Arruda E Silva, Milene Silveira Ferreira, Maria Nazaré Oliveira Freitas, Bianca Nascimento de Alcantara, Sandro Patroca da Silva, Stefânia Araújo Miranda, Barbara Alves Sepulvreda, Layna Thayssa Guimarães Corrêa, Andréa Maria Góes Negrão, Pedro Fernando da Costa Vasconcelos, Alexandre do Rosário Casseb
BACKGROUND: In this study, we evaluated the role of free-living domestic pigeons (Columba livia) as a reservoir of arboviruses in the city of Belém, state of Pará, Brazil. We investigated the presence of antibodies against the most prevalent arboviruses. OBJECTIVES: This study was aimed at evaluating some clinical and physical parameters of domestic pigeons, including the presence of antibodies to Amazon-endemic arboviruses. METHODS: Eighty-five healthy pigeons were captured in Mangal das Garças Park, in Belém, and were bled...
August 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28757043/a-large-scale-serological-survey-of-akabane-virus-infection-in-cattle-yak-sheep-and-goats-in-china
#6
Jidong Wang, Kim R Blasdell, Hong Yin, Peter J Walker
Akabane virus (AKAV) is a member of the Simbu serogroup, classified in the genus Orthobunyavirus, family Bunyaviridae. AKAV infection can cause abortion, stillbirth, and congenital arthrogryposis and hydranencephaly in cattle and sheep. The distribution and prevalence of AKAV infection in China is still unknown. A total of 2731 sera collected from 2006 to 2015 in 24 provinces of China from cattle, sheep, goats and yak were examined by serum neutralisation test. The overall seroprevalence rates for AKAV antibodies were 21...
August 2017: Veterinary Microbiology
https://www.readbyqxmd.com/read/28754494/safety-and-immunogenicity-of-a-mrna-rabies-vaccine-in-healthy-adults-an-open-label-non-randomised-prospective-first-in-human-phase-1-clinical-trial
#7
Martin Alberer, Ulrike Gnad-Vogt, Henoch Sangjoon Hong, Keyvan Tadjalli Mehr, Linus Backert, Greg Finak, Raphael Gottardo, Mihai Alexandru Bica, Aurelio Garofano, Sven Dominik Koch, Mariola Fotin-Mleczek, Ingmar Hoerr, Ralf Clemens, Frank von Sonnenburg
BACKGROUND: Vaccines based on mRNA coding for antigens have been shown to be safe and immunogenic in preclinical models. We aimed to report results of the first-in-human proof-of-concept clinical trial in healthy adults of a prophylactic mRNA-based vaccine encoding rabies virus glycoprotein (CV7201). METHODS: We did an open-label, uncontrolled, prospective, phase 1 clinical trial at one centre in Munich, Germany. Healthy male and female volunteers (aged 18-40 years) with no history of rabies vaccination were sequentially enrolled...
July 25, 2017: Lancet
https://www.readbyqxmd.com/read/28742857/dna-immunisation-with-dengue-virus-e-protein-domains-i-ii-but-not-domain-iii-enhances-zika-west-nile-and-yellow-fever-virus-infection
#8
Jose L Slon Campos, Monica Poggianella, Sara Marchese, Monica Mossenta, Jyoti Rana, Francesca Arnoldi, Marco Bestagno, Oscar R Burrone
Dengue virus (DENV), the causative agent of dengue disease, is among the most important mosquito-borne pathogens worldwide. DENV is composed of four closely related serotypes and belongs to the Flaviviridae family alongside other important arthropod-borne viral pathogens such as Zika virus (ZIKV), West Nile virus (WNV) and Yellow Fever virus (YFV). After infection, the antibody response is mostly directed to the viral E glycoprotein which is composed of three structural domains named DI, DII and DIII that share variable degrees of homology among different viruses...
2017: PloS One
https://www.readbyqxmd.com/read/28650085/immunogenicity-of-plant-produced-african-horse-sickness-virus-like-particles-implications-for-a-novel-vaccine
#9
Susan J Dennis, Ann E Meyers, Alan J Guthrie, Inga I Hitzeroth, Edward P Rybicki
African horse sickness (AHS) is a debilitating and often fatal viral disease affecting horses in much of Africa, caused by the dsRNA orbivirus African horse sickness virus (AHSV). Vaccination remains the single most effective weapon in combatting AHS, as there is no treatment for the disease apart from good animal husbandry. However, the only commercially available vaccine is a live attenuated version of the virus (LAV). The threat of outbreaks of the disease outside its endemic region and the fact that the LAV is not licensed for use elsewhere in the world, have spurred attempts to develop an alternative safer, yet cost-effective recombinant vaccine...
June 26, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28606591/safety-and-immunogenicity-of-the-rvsv%C3%A2-g-zebov-gp-ebola-virus-vaccine-candidate-in-healthy-adults-a-phase-1b-randomised-multicentre-double-blind-placebo-controlled-dose-response-study
#10
RANDOMIZED CONTROLLED TRIAL
D Gray Heppner, Tracy L Kemp, Brian K Martin, William J Ramsey, Richard Nichols, Emily J Dasen, Charles J Link, Rituparna Das, Zhi Jin Xu, Eric A Sheldon, Teresa A Nowak, Thomas P Monath
BACKGROUND: The 2014 Zaire Ebola virus outbreak highlighted the need for a safe, effective vaccine with a rapid onset of protection. We report the safety and immunogenicity of the recombinant vesicular stomatitis virus-Zaire Ebola virus envelope glycoprotein vaccine (rVSV∆G-ZEBOV-GP) across a 6 log10 dose range in two sequential cohorts. METHODS: In this phase 1b double-blind, placebo-controlled, dose-response study we enrolled and randomly assigned healthy adults (aged 18-61 years) at eight study sites in the USA to receive a single injection of vaccine or placebo, administered by intramuscular injection...
August 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28579232/chadox1-and-mva-based-vaccine-candidates-against-mers-cov-elicit-neutralising-antibodies-and-cellular-immune-responses-in-mice
#11
Naif Khalaf Alharbi, Eriko Padron-Regalado, Craig P Thompson, Alexandra Kupke, Daniel Wells, Megan A Sloan, Keith Grehan, Nigel Temperton, Teresa Lambe, George Warimwe, Stephan Becker, Adrian V S Hill, Sarah C Gilbert
The Middle East respiratory syndrome coronavirus (MERS-CoV) has infected more than 1900 humans, since 2012. The syndrome ranges from asymptomatic and mild cases to severe pneumonia and death. The virus is believed to be circulating in dromedary camels without notable symptoms since the 1980s. Therefore, dromedary camels are considered the only animal source of infection. Neither antiviral drugs nor vaccines are approved for veterinary or medical use despite active research on this area. Here, we developed four vaccine candidates against MERS-CoV based on ChAdOx1 and MVA viral vectors, two candidates per vector...
June 27, 2017: Vaccine
https://www.readbyqxmd.com/read/28571760/a-bivalent-dendrimeric-peptide-bearing-a-t-cell-epitope-from-foot-and-mouth-disease-virus-protein-3a-improves-humoral-response-against-classical-swine-fever-virus
#12
José Alejandro Bohórquez, Sira Defaus, Sara Muñoz-González, Marta Perez-Simó, Rosa Rosell, Lorenzo Fraile, Francisco Sobrino, David Andreu, Llilianne Ganges
Three dendrimeric peptides were synthesized in order to evaluate their immunogenicity and their potential protection against classical swine fever virus (CSFV) in domestic pigs. Construct 1, an optimized version of a previously used dendrimer, had four copies of a B-cell epitope derived from CSFV E2 glycoprotein connected to an also CSFV-derived T-cell epitope through maleimide instead of thioether linkages. Construct 2 was similarly built but included only two copies of the B-cell epitope, and in also bivalent construct 3 the CSFV T-cell epitope was replaced by a previously described one from the 3A protein of foot-and-mouth disease virus (FMDV)...
May 30, 2017: Virus Research
https://www.readbyqxmd.com/read/28558001/reverse-epitope-mapping-of-the-e2-glycoprotein-in-antibody-associated-hepatitis-c-virus
#13
Amruta S Naik, Ania Owsianka, Brendan A Palmer, Ciaran J O'Halloran, Nicole Walsh, Orla Crosbie, Elizabeth Kenny-Walsh, Arvind H Patel, Liam J Fanning
The humoral immune system responds to chronic hepatitis C virus (HCV) infection by producing neutralising antibodies (nAb). In this study we generated three HCV pseudoparticles in which E1E2 glycoprotein sequence was targeted by the host humoral immune system. We used patient derived virus free Fabs (VF-Fabs) obtained from HCV genotype 1a (n = 3), genotype 1b (n = 7) and genotype 3a (n = 1) for neutralisation of HCVpp produced in this study both individually and in combination. Based on the available anti-HCV monoclonal nAb mapping information we selected amino acid region 384-619 for conformational epitope mapping...
2017: PloS One
https://www.readbyqxmd.com/read/28533093/safety-and-immunogenicity-of-a-live-attenuated-influenza-h5-candidate-vaccine-strain-a-17-turkey-turkey-05-133-h5n2-and-its-priming-effects-for-potential-pre-pandemic-use-a-randomised-double-blind-placebo-controlled-trial
#14
RANDOMIZED CONTROLLED TRIAL
Punnee Pitisuttithum, Kobporn Boonnak, Supat Chamnanchanunt, Pilaipan Puthavathana, Viravarn Luvira, Hatairat Lerdsamran, Jaranit Kaewkungwal, Saranath Lawpoolsri, Vipa Thanachartwet, Udomsak Silachamroon, Wanibtisam Masamae, Alexandra Schuetz, Ponthip Wirachwong, Sit Thirapakpoomanunt, Larisa Rudenko, Erin Sparrow, Martin Friede, Marie-Paule Kieny
BACKGROUND: The emergence of highly pathogenic avian influenza H5N1 viruses has raised concerns about their pandemic potential. Vaccination is the most effective way of preventing influenza. In this study, we investigated the safety and immunogenicity of an avian H5N2 live attenuated influenza vaccine (LAIV H5N2) in healthy Thai adults and its priming immune responses with an H5N1 inactivated vaccine boost. METHODS: This study was done at the Vaccine Trial Centre at Mahidol University, Bangkok, Thailand and was divided into two parts...
August 2017: Lancet Infectious Diseases
https://www.readbyqxmd.com/read/28507200/effects-of-microvirin-mono-and-oligomers-on-hepatitis-c-virus
#15
Yuan Qin Min, Xu Chu Duan, Yi Dan Zhou, Anna Kulinich, Meng Wang, Zhi-Peng Cai, Hong Yu Ma, Li Liu, Xiao Lian Zhang, Josef Voglmeir
Microvirin is a carbohydrate binding protein which shows high specificity for high-mannose type N-glycan structures. In this study we tried to identify whether microvirin could bind to high-mannose containing Hepatitis C Virus (HCV) envelope glycoproteins, which are heavily decorated decorated high-mannose glycans. In addition, recombinantly expressed microvirin oligomers in di-, tri-, and tetrameric form were evaluated for their viral inhibition. Microvirin oligomers bound more efficiently to HCV virions, and displayed in comparison to the microvirin monomer a higher neutralisation potency against HCV infection...
May 15, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/28475122/harnessing-local-immunity-for-an-effective-universal-swine-influenza-vaccine
#16
REVIEW
Elma Tchilian, Barbara Holzer
Influenza A virus infections are a global health threat to humans and are endemic in pigs, contributing to decreased weight gain and suboptimal reproductive performance. Pigs are also a source of new viruses of mixed swine, avian, and human origin, potentially capable of initiating human pandemics. Current inactivated vaccines induce neutralising antibody against the immunising strain but rapid escape occurs through antigenic drift of the surface glycoproteins. However, it is known that prior infection provides a degree of cross-protective immunity mediated by cellular immune mechanisms directed at the more conserved internal viral proteins...
May 5, 2017: Viruses
https://www.readbyqxmd.com/read/28446669/salivary-blockade-protects-the-lower-respiratory-tract-of-mice-from-lethal-influenza-virus-infection
#17
Karen Ivinson, Georgia Deliyannis, Leanne McNabb, Lara Grollo, Brad Gilbertson, David Jackson, Lorena E Brown
It is possible to model the progression of influenza virus from the upper respiratory tract to the lower respiratory tract in the mouse using viral inoculum delivered in a restricted manner to the nose. In this model, infection with the A/Udorn/307/72 (Udorn) strain of virus results ultimately in high viral titers in both the trachea and lungs. In contrast, the A/Puerto Rico/8/34 (PR8) strain causes an infection that is almost entirely limited to the nasal passages. The factors that govern the progression of virus down the respiratory tract are not well understood...
July 15, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28438410/vaccination-with-recombinant-modified-vaccinia-ankara-mva-viruses-expressing-single-african-horse-sickness-virus-vp2-antigens-induced-cross-reactive-virus-neutralising-antibodies-vnab-in-horses-when-administered-in-combination
#18
Nicola Mary Manning, Katarzyna Bachanek-Bankowska, Peter Paul Clement Mertens, Javier Castillo-Olivares
African horse sickness is a lethal viral disease of equids transmitted by biting midges of the Genus Culicoides. The disease is endemic to sub-Saharan Africa but outbreaks of high mortality and economic impact have occurred in the past in non-endemic regions of Africa, Asia and Southern Europe. Vaccination is critical for the control of this disease but only live attenuated vaccines are currently available. However, there are bio-safety concerns over the use of this type of vaccines, especially in non-endemic countries, and live attenuated vaccines do not have DIVA (Differentiation of Infected from Vaccinated Animals) capacity...
April 21, 2017: Vaccine
https://www.readbyqxmd.com/read/28434129/phage-displayed-peptides-that-mimic-epitopes-of-hepatitis-e-virus-capsid
#19
Osmany Larralde, Juraj Petrik
Hepatitis E is an emerging zoonotic infection of increasing public health threat for the UK, especially for immunosuppressed individuals. A human recombinant vaccine has been licensed only in China and is not clear whether it protects against hepatitis E virus (HEV) genotype 3, the most prevalent in Europe. The aim of this study was to use phage display technology as a tool to identify peptides that mimic epitopes of HEV capsid (mimotopes). We identified putative linear and conformational mimotopes using sera from Scottish blood donors that have the immunological imprint of past HEV infection...
August 2017: Medical Microbiology and Immunology
https://www.readbyqxmd.com/read/28421694/molecular-engineering-and-plant-expression-of-an-immunoglobulin-heavy-chain-scaffold-for-delivery-of-a-dengue-vaccine-candidate
#20
Mi-Young Kim, Craig Van Dolleweerd, Alastair Copland, Matthew John Paul, Sven Hofmann, Gina R Webster, Emily Julik, Ivonne Ceballos-Olvera, Jorge Reyes-Del Valle, Moon-Sik Yang, Yong-Suk Jang, Rajko Reljic, Julian K Ma
In order to enhance vaccine uptake by the immune cells in vivo, molecular engineering approach was employed to construct a polymeric immunoglobulin G scaffold (PIGS) that incorporates multiple copies of an antigen and targets the Fc gamma receptors on antigen-presenting cells. These self-adjuvanting immunogens were tested in the context of dengue infection, for which there is currently no globally licensed vaccine yet. Thus, the consensus domain III sequence (cEDIII) of dengue glycoprotein E was incorporated into PIGS and expressed in both tobacco plants and Chinese Ovary Hamster cells...
April 19, 2017: Plant Biotechnology Journal
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