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https://www.readbyqxmd.com/read/29348627/chikungunya-virus-nsp1-interacts-directly-with-nsp2-and-modulates-its-atpase-activity
#1
Sameer Kumar, Abhishek Kumar, Prabhudutta Mamidi, Atul Tiwari, Sriram Kumar, Animamalar Mayavannan, Sagarika Mudulli, Ajit Kumar Singh, Bharat Bhusan Subudhi, Soma Chattopadhyay
Chikungunya virus (CHIKV) is a mosquito-borne virus, which has created an alarming threat in the world due to unavailability of vaccine and antiviral compounds. The CHIKV nsP2 contains ATPase, RTPase, helicase and protease activities, whereas, nsP1 is a viral capping enzyme. In alphaviruses, the four non-structural proteins form the replication complex in the cytoplasm and this study characterizes the interaction between CHIKV nsP1 and nsP2. It was observed that, both the proteins co-localize in the cytoplasm and interact in the CHIKV infected cells by confocal microscopy and immunoprecipitation assay...
January 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29348555/novel-immunoinformatics-approaches-to-design-multi-epitope-subunit-vaccine-for-malaria-by-investigating-anopheles-salivary-protein
#2
Rajan Kumar Pandey, Tarun Kumar Bhatt, Vijay Kumar Prajapati
Malaria fever has been pervasive for quite a while in tropical developing regions causing high morbidity and mortality. The causal organism is a protozoan parasite of genus Plasmodium which spreads to the human host by the bite of hitherto infected female Anopheles mosquito. In the course of biting, a salivary protein of Anopheles helps in blood feeding behavior and having the ability to elicit the host immune response. This study represents a series of immunoinformatics approaches to design multi-epitope subunit vaccine using Anopheles mosquito salivary proteins...
January 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29346287/development-of-zika-virus-vaccines
#3
REVIEW
Huda Makhluf, Sujan Shresta
Zika virus (ZIKV) is a mosquito-borne flavivirus that emerged as a global threat following the most recent outbreak in Brazil in 2015. ZIKV infection of pregnant women is associated with fetal abnormalities such as microcephaly, and infection of adults can lead to Guillain-Barré syndrome, an autoimmune disease characterized by neurological deficits. Although there are currently licensed vaccines for other flaviviruses, there remains an urgent need for preventative vaccines against ZIKV infection. Herein we describe the current efforts to accelerate the development of ZIKV vaccines using various platforms, including live attenuated virus, inactivated virus, DNA and RNA, viral vectors, and in silico-predicted immunogenic viral epitopes...
January 18, 2018: Vaccines
https://www.readbyqxmd.com/read/29343583/structural-study-of-the-c-terminal-domain-of-non-structural-protein-1-from-japanese-encephalitis-virus
#4
Thanalai Poonsiri, Gareth S A Wright, Michael S Diamond, Lance Turtle, Tom Solomon, Svetlana V Antonyuk
Japanese encephalitis virus (JEV) is a mosquito-transmitted Flavivirus that is closely related to other emerging viral pathogens including dengue, West Nile (WNV) and Zika viruses. JEV infection can result in meningitis and encephalitis, which in severe cases cause permanent brain damage and death. JEV occurs predominantly in rural areas throughout Southeast Asia, the Pacific islands and the Far East, causing around 68,000 cases worldwide each year. In this study, we present a 2.1 Å resolution crystal structure of the C-terminal β-ladder domain of JEV non-structural protein 1 (NS1-C)...
January 17, 2018: Journal of Virology
https://www.readbyqxmd.com/read/29336951/design-synthesis-and-evaluation-against-chikungunya-virus-of-novel-small-molecule-antiviral-agents
#5
Roberta Tardugno, Gilda Giancotti, Tine De Burghgraeve, Leen Delang, Johan Neyts, Pieter Leyssen, Andrea Brancale, Marcella Bassetto
Chikungunya virus is a re-emerging arbovirus transmitted to humans by mosquitoes, responsible for an acute flu-like illness associated with debilitating arthralgia, which can persist for several months or become chronic. In recent years, this viral infection has spread worldwide with a previously unknown virulence. To date, no specific antivirals treatments nor vaccines are available against this important pathogen. Starting from the structures of two antiviral hits previously identified in our research group with in silico techniques, this work describes the design and preparation of 31 novel structural analogues, with which different pharmacophoric features of the two hits have been explored and correlated with the inhibition of Chikungunya virus replication in cells...
January 6, 2018: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/29316918/in-silico-epitope-mapping-and-experimental-evaluation-of-the-merozoite-adhesive-erythrocytic-binding-protein-maebl-as-a-malaria-vaccine-candidate
#6
Pedro Cravo, Renato B Machado, Juliana A Leite, Taizy Leda, Rossarin Suwanarusk, Najara Bittencourt, Letusa Albrecht, Carla Judice, Stefanie C P Lopes, Marcus V G Lacerda, Marcelo U Ferreira, Irene S Soares, Yun Shan Goh, Daniel Y Bargieri, François Nosten, Bruce Russell, Laurent Rénia, Fabio T M Costa
BACKGROUND: Technical limitations for culturing the human malaria parasite Plasmodium vivax have impaired the discovery of vaccine candidates, challenging the malaria eradication agenda. The immunogenicity of the M2 domain of the Merozoite Adhesive Erythrocytic Binding Protein (MAEBL) antigen cloned from the Plasmodium yoelii murine parasite, has been previously demonstrated. RESULTS: Detailed epitope mapping of MAEBL through immunoinformatics identified several MHCI, MHCII and B cell epitopes throughout the peptide, with several of these lying in the M2 domain and being conserved between P...
January 10, 2018: Malaria Journal
https://www.readbyqxmd.com/read/29300367/rational-design-of-a-new-class-of-toll-like-receptor-4-tlr4-tryptamine-related-agonists-by-means-of-the-structure-and-ligand-based-virtual-screening-for-vaccine-adjuvant-discovery
#7
Jan Honegr, Rafael Dolezal, David Malinak, Marketa Benkova, Ondrej Soukup, Joyce S F D de Almeida, Tanos C C Franca, Kamil Kuca, Roman Prymula
In order to identify novel lead structures for human toll-like receptor 4 (hTLR4) modulation virtual high throughput screening by a peta-flops-scale supercomputer has been performed. Based on the in silico studies, a series of 12 compounds related to tryptamine was rationally designed to retain suitable molecular geometry for interaction with the hTLR4 binding site as well as to satisfy general principles of drug-likeness. The proposed compounds were synthesized, and tested by in vitro and ex vivo experiments, which revealed that several of them are capable to stimulate hTLR4 in vitro up to 25% activity of Monophosphoryl lipid A...
January 4, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29297850/the-algal-chloroplast-as-a-synthetic-biology-platform-for-production-of-therapeutic-proteins
#8
Yuliya M Dyo, Saul Purton
The chloroplast of Chlamydomonas reinhardtii and other microalgae represents an attractive new platform for the synthesis of recombinant therapeutics using synthetic biology (synbio) approaches. Transgenes can be designed in silico, assembled from validated DNA parts and inserted at precise and predetermined locations within the chloroplast genome to give stable synthesis of a desired recombinant protein. Numerous recent examples of different therapeutic proteins produced successfully in the C. reinhardtii chloroplast highlight the potential of this green alga as a simple, low-cost and benign host...
January 3, 2018: Microbiology
https://www.readbyqxmd.com/read/29297294/combining-agent-based-models-and-virtual-screening-techniques-to-predict-the-best-citrus-derived-vaccine-adjuvants-against-human-papilloma-virus
#9
Marzio Pennisi, Giulia Russo, Silvia Ravalli, Francesco Pappalardo
BACKGROUND: Human papillomavirus infection is a global social burden that, every year, leads to thousands new diagnosis of cancer. The introduction of a protocol of immunization, with Gardasil and Cervarix vaccines, has radically changed the way this infection easily spreads among people. Even though vaccination is only preventive and not therapeutic, it is a strong tool capable to avoid the consequences that this pathogen could cause. Gardasil vaccine is not free from side effects and the duration of immunity is not always well determined...
December 28, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/29291214/in-silico-design-and-molecular-docking-evaluation-of-peptides-derivatives-from-bacteriocins-and-porcine-beta-defensin-2-as-inhibitors-of-hepatitis-e-virus-capsid-protein
#10
Carolina Quintero-Gil, Jaime Parra-Suescún, Albeiro Lopez-Herrera, Sergio Orduz
Hepatitis E virus (HEV) is considered the main etiological agent that causes acute hepatitis. It is estimated that 20 million cases occur annually worldwide, reaching mortality rates of 28% in pregnant women. To date, available treatments and vaccines have not been entirely effective. In this study, six antiviral peptides derived from the sequences of porcine Beta-Defensin-2 and bacteriocins Nisin and Subtilosin were generate using in silico tools in order to propose new antiviral agents. Through the use of molecular docking, interactions between the HEV capsid protein and the six new antiviral peptide candidates were evaluated...
September 2017: Virusdisease
https://www.readbyqxmd.com/read/29274845/discovery-of-a-non-nucleoside-rna-polymerase-inhibitor-for-blocking-zika-virus-replication-through-in-silico-screening
#11
Aryamav Pattnaik, Nicholas Palermo, Bikash R Sahoo, Zhe Yuan, Duoyi Hu, Arun S Annamalai, Hiep L X Vu, Ignacio Correas, Pavan Kumar Prathipati, Christopher J Destache, Qingsheng Li, Fernando A Osorio, Asit K Pattnaik, Shi-Hua Xiang
Zika virus (ZIKV), an emerging arbovirus, has become a major human health concern globally due to its association with congenital abnormalities and neurological diseases. Licensed vaccines or antivirals against ZIKV are currently unavailable. Here, by employing a structure-based approach targeting the ZIKV RNA-dependent RNA polymerase (RdRp), we conducted in silico screening of a library of 100,000 small molecules and tested the top ten lead compounds for their ability to inhibit the virus replication in cell-based in vitro assays...
December 21, 2017: Antiviral Research
https://www.readbyqxmd.com/read/29249313/in-silico-identification-and-high-throughput-screening-of-antigenic-proteins-as-candidates-for-a-mannheimia-haemolytica-vaccine
#12
Cassidy L Klima, Rahat Zaheer, Shaun R Cook, Jay Rasmussen, Trevor W Alexander, Andrew Potter, Steve Hendrick, Tim A McAllister
This study examined the use of comparative genomic analysis for vaccine design against Mannheimia haemolytica, a respiratory pathogen of ruminants. A total of 2,341genes were identified in at least half of the 23 genomes. Of these, a total of 240 were identified to code for N-terminal signal peptides with diverse sub-cellular localizations (78 periplasmic, 52 outer membrane, 15 extracellular, 13 cytoplasmic membrane and 82 unknown) and were examined in an ELISA assay using a coupled-cell free transcription/translation system for protein expressionwith antisera from cattle challenged with serovars 1, 2 or 6 of M...
January 2018: Veterinary Immunology and Immunopathology
https://www.readbyqxmd.com/read/29230214/exome-sequencing-identifies-a-novel-map3k14-mutation-in-recessive-atypical-combined-immunodeficiency
#13
Nikola Schlechter, Brigitte Glanzmann, Eileen Garner Hoal, Mardelle Schoeman, Britt-Sabina Petersen, Andre Franke, Yu-Lung Lau, Michael Urban, Paul David van Helden, Monika Maria Esser, Marlo Möller, Craig Kinnear
Primary immunodeficiency disorders (PIDs) render patients vulnerable to infection with a wide range of microorganisms and thus provide good in vivo models for the assessment of immune responses during infectious challenges. Priming of the immune system, especially in infancy, depends on different environmental exposures and medical practices. This may determine the timing and phenotype of clinical appearance of immune deficits as exemplified with early exposure to Bacillus Calmette-Guérin (BCG) vaccination and dissemination in combined immunodeficiencies...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29226722/the-use-of-databases-data-mining-and-immunoinformatics-in-vaccinology-where-are-we
#14
Nagendra R Hegde, S Gauthami, H M Sampath Kumar, Jagadeesh Bayry
Vaccinology has evolved from a sub-discipline focussed on simplistic vaccine development based on antibody-mediated protection to a separate discipline involving epidemiology, host and pathogen biology, immunology, genomics, proteomics, structure biology, protein engineering, chemical biology, and delivery systems. Data mining in combination with bioinformatics has provided a scaffold linking all these disciplines to the design of vaccines and vaccine adjuvants. Areas covered: This review provides background knowledge on immunological aspects which have been exploited with informatics for the in silico analysis of immune responses and the design of vaccine antigens...
December 11, 2017: Expert Opinion on Drug Discovery
https://www.readbyqxmd.com/read/29225429/in-silico-validation-of-d7-salivary-protein-derived-b-and-t-cell-epitopes-of-aedes-aegypti-as-potential-vaccine-to-prevent-transmission-of-flaviviruses-and-togaviruses-to-humans
#15
Sathish Sankar, Mageshbabu Ramamurthy, Balaji Nandagopal, Gopalan Sridharan
Mosquito (Aedes aegyptii) salivary proteins play a crucial role in facilitating viral transmission from vector-to-host due to their role in facilitating the "blood meal" of the vector. Three main proteins, D7, aegyptin and Sialokinin play a role in this process. Using in-silico programs, we identified B- and T-cell epitopes in the mosquito salivary proteins D7 long and short form. T-cell epitopes with high affinity to the most prevalent HLA MHC class-I supertypes among different population groups was chosen...
2017: Bioinformation
https://www.readbyqxmd.com/read/29216890/in-silico-and-phylogenetic-analyses-of-partial-bbrap-1-bbcp2-bbsbp-4-and-bb%C3%AE-tub-gene-sequences-of-babesia-bovis-isolates-from-cattle-in-south-africa
#16
Phillip Senzo Mtshali, Moses Sibusiso Mtshali
BACKGROUND: Bovine babesiosis is one of the most economically important tick-borne diseases threatening the livestock industry globally including South Africa. This disease is induced by members of Babesia bovis species. Antigenic variations among geographical strains of B. bovis, and these heterogeneities are cited as the mechanism by which parasites evade from host immune system and they hamper the successful development of a single vaccine that could confer absolute protection. Given the economic importance of livestock industry in South Africa, the extent of genetic diversity among field isolates of B...
December 8, 2017: BMC Veterinary Research
https://www.readbyqxmd.com/read/29207506/longitudinal-surveillance-of-porcine-rotavirus-b-strains-from-the-united-states-and-canada-and-in-silico-identification-of-antigenically-important-sites
#17
Frances K Shepherd, Michael P Murtaugh, Fangzhou Chen, Marie R Culhane, Douglas G Marthaler
Rotavirus B (RVB) is an important swine pathogen, but control and prevention strategies are limited without an available vaccine. To develop a subunit RVB vaccine with maximal effect, we characterized the amino acid sequence variability and predicted antigenicity of RVB viral protein 7 (VP7), a major neutralizing antibody target, from clinically infected pigs in the United States and Canada. We identified genotype-specific antigenic sites that may be antibody neutralization targets. While some antigenic sites had high amino acid functional group diversity, nine antigenic sites were completely conserved...
December 3, 2017: Pathogens
https://www.readbyqxmd.com/read/29207326/in-silico-prediction-of-potential-vaccine-candidates-on-capsid-protein-of-human-bocavirus-1
#18
Narayanan Kalyanaraman
Human bocavirus 1 (HBoV1) is a newly identified parvovirus that causes serious respiratory infection among children across the globe. Aim of the present study was to predict immunogenic residues located on the VP2 protein of HBoV1 towards development of epitope based vaccines. Several computational tools were employed to predict epitopes (bothT and B cell restricted) with stringent regulation for the improvement of confidence. After meticulous analysis, the peptide "TTPWTYFNFNQY" was identified as potential candidate for development of preventive vaccine...
December 2, 2017: Molecular Immunology
https://www.readbyqxmd.com/read/29203182/the-generation-of-a-simian-adenoviral-vectored-hcv-vaccine-encoding-genetically-conserved-gene-segments-to-target-multiple-hcv-genotypes
#19
Annette von Delft, Timothy A Donnison, José Lourenço, Claire Hutchings, Caitlin E Mullarkey, Anthony Brown, Oliver G Pybus, Paul Klenerman, Senthil Chinnakannan, Eleanor Barnes
BACKGROUND: Hepatitis C virus (HCV) genomic variability is a major challenge to the generation of a prophylactic vaccine. We have previously shown that HCV specific T-cell responses induced by a potent T-cell vaccine encoding a single strain subtype-1b immunogen target epitopes dominant in natural infection. However, corresponding viral regions are highly variable at a population level, with a reduction in T-cell reactivity to these variants. We therefore designed and manufactured second generation simian adenovirus vaccines encoding genomic segments, conserved between viral genotypes and assessed these for immunogenicity...
December 1, 2017: Vaccine
https://www.readbyqxmd.com/read/29195784/a-novel-in-silico-minigene-vaccine-based-on-cd4-t-helper-and-b-cell-epitopes-of-eg95-isolates-for-vaccination-against-cystic-echinococcosis
#20
Mohammad M Pourseif, Gholamali Moghaddam, Behrouz Naghili, Nazli Saeedi, Sepideh Parvizpour, Ahmad Nematollahi, Yadollah Omidi
EG95 oncospheral antigen plays a crucial role in Echinococcus granulosus pathogenicity. Considering the diversity of antigen among different EG95 isolates, it seems to be an ideal antigen for designing a universal multivalent minigene vaccine, so-called multi-epitope vaccine. This is the first in silico study to design a construct for the development of global EG95-based hydatid vaccine against E. granulosus in intermediate hosts. After antigen sequence selection, the three-dimensional structure of EG95 was modeled and multilaterally validated...
November 23, 2017: Computational Biology and Chemistry
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