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In silico vaccine

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https://www.readbyqxmd.com/read/28237896/towards-toxicokinetic-modelling-of-aluminium-exposure-from-adjuvants-in-medicinal-products
#1
Karin Weisser, Sabine Stübler, Walter Matheis, Wilhelm Huisinga
As a potentially toxic agent on nervous system and bone, the safety of aluminium exposure from adjuvants in vaccines and subcutaneous immune therapy (SCIT) products has to be continuously re-evaluated, especially regarding concomitant administrations. For this purpose, knowledge on absorption and disposition of aluminium in plasma and tissues is essential. Pharmacokinetic data after vaccination in humans, however, are not available, and for methodological and ethical reasons difficult to obtain. To overcome these limitations, we discuss the possibility of an in vitro-in silico approach combining a toxicokinetic model for aluminium disposition with biorelevant kinetic absorption parameters from adjuvants...
February 22, 2017: Regulatory Toxicology and Pharmacology: RTP
https://www.readbyqxmd.com/read/28236172/in-silico-screening-identification-and-validation-of-a-novel-vaccine-candidate-in-the-fight-against-plasmodium-falciparum
#2
Sandeep Kumar Panda, Rajani Kanta Mahapatra
With the enormous genetic plasticity of malaria parasite, the challenges of developing a potential malaria vaccine candidate with highest efficacy still remain. This study has incorporated a bioinformatics-based screening approach to explore potential vaccine candidates in Plasmodium falciparum proteome. A systematic strategy was defined to screen proteins from the Malaria Parasite Metabolic Pathways (MPMP) database, on the basis of surface exposure, non-homology with host proteome, orthology with related Plasmodium species, and MHC class I and II binding promiscuity...
February 24, 2017: Parasitology Research
https://www.readbyqxmd.com/read/28223984/plasmodium-vivax-cell-traversal-protein-for-ookinetes-and-sporozoites-naturally-acquired-humoral-immune-response-and-b-cell-epitope-mapping-in-brazilian-amazon-inhabitants
#3
Rodrigo Nunes Rodrigues-da-Silva, Isabela Ferreira Soares, Cesar Lopez-Camacho, João Hermínio Martins da Silva, Daiana de Souza Perce-da-Silva, Antônio Têva, Antônia Maria Ramos Franco, Francimeire Gomes Pinheiro, Lana Bitencourt Chaves, Lilian Rose Pratt-Riccio, Arturo Reyes-Sandoval, Dalma Maria Banic, Josué da Costa Lima-Junior
The cell-traversal protein for ookinetes and sporozoites (CelTOS), a highly conserved antigen involved in sporozoite motility, plays an important role in the traversal of host cells during the preerythrocytic stage of Plasmodium species. Recently, it has been considered an alternative target when designing novel antimalarial vaccines against Plasmodium falciparum. However, the potential of Plasmodium vivax CelTOS as a vaccine target is yet to be explored. This study evaluated the naturally acquired immune response against a recombinant P...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28216574/an-in-silico-identification-of-common-putative-vaccine-candidates-against-treponema-pallidum-a-reverse-vaccinology-and-subtractive-genomics-based-approach
#4
Arun Kumar Jaiswal, Sandeep Tiwari, Syed Babar Jamal, Debmalya Barh, Vasco Azevedo, Siomar C Soares
Sexually transmitted infections (STIs) are caused by a wide variety of bacteria, viruses, and parasites that are transmitted from one person to another primarily by vaginal, anal, or oral sexual contact. Syphilis is a serious disease caused by a sexually transmitted infection. Syphilis is caused by the bacterium Treponema pallidum subspecies pallidum. Treponema pallidum (T. pallidum) is a motile, gram-negative spirochete, which can be transmitted both sexually and from mother to child, and can invade virtually any organ or structure in the human body...
February 14, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28208616/immunoinformatics-features-linked-to-leishmania-vaccine-development-data-integration-of-experimental-and-in-silico-studies
#5
Rory C F Brito, Frederico G Guimarães, João P L Velloso, Rodrigo Corrêa-Oliveira, Jeronimo C Ruiz, Alexandre B Reis, Daniela M Resende
Leishmaniasis is a wide-spectrum disease caused by parasites from Leishmania genus. There is no human vaccine available and it is considered by many studies as apotential effective tool for disease control. To discover novel antigens, computational programs have been used in reverse vaccinology strategies. In this work, we developed a validation antigen approach that integrates prediction of B and T cell epitopes, analysis of Protein-Protein Interaction (PPI) networks and metabolic pathways. We selected twenty candidate proteins from Leishmania tested in murine model, with experimental outcome published in the literature...
February 10, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28204975/surface-and-exoproteomes-of-gram-positive-pathogens-for-vaccine-discovery
#6
Massimiliano Biagini, Fabio Bagnoli, Nathalie Norais
Reverse vaccinology has been very successful in the discovery of vaccine candidates against many pathogenic bacteria by integrating genome and proteome mining. This great achievement was facilitated by the complementarity of the in silico prediction of antigens and the empirical data on protein localization, expression, and immunogenicity obtained through different techniques based on electrophoresis, immunoblotting and mass spectrometry. An iterative process between information provided by DNA sequence analysis and proteomic data has been established leading to precise antigen identification...
February 16, 2017: Current Topics in Microbiology and Immunology
https://www.readbyqxmd.com/read/28193166/vacsol-a-high-throughput-in-silico-pipeline-to-predict-potential-therapeutic-targets-in-prokaryotic-pathogens-using-subtractive-reverse-vaccinology
#7
Muhammad Rizwan, Anam Naz, Jamil Ahmad, Kanwal Naz, Ayesha Obaid, Tamsila Parveen, Muhammad Ahsan, Amjad Ali
BACKGROUND: With advances in reverse vaccinology approaches, a progressive improvement has been observed in the prediction of putative vaccine candidates. Reverse vaccinology has changed the way of discovery and provides a mean to propose target identification in reduced time and labour. In this regard, high throughput genomic sequencing technologies and supporting bioinformatics tools have greatly facilitated the prompt analysis of pathogens, where various predicted candidates have been found effective against certain infections and diseases...
February 13, 2017: BMC Bioinformatics
https://www.readbyqxmd.com/read/28185986/a-novel-design-of-a-multi-antigenic-multistage-and-multi-epitope-vaccine-against-helicobacter-pylori-an-in-silico-approach
#8
Beatriz Meza, Felipe Ascencio, Arturo Pedro Sierra-Beltrán, Javier Torres, Carlos Angulo
Helicobacter pylori have colonized the gastric mucosa of half of the population worldwide. This bacterium is classified as a definitive type I carcinogen by the World Health Organization and no effective vaccine has been found against it yet. Thus, a logical and rational vaccine design against H. pylori is necessary. Because of its tremendous complexity and elicited immune responses, the vaccine design should considered multiple antigens to enhance immune-protection, involved in the different stages of pathogenesis besides inducing a specific immune response by B- and T-cell multi-epitopes...
February 7, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28182704/subunit-vaccine-candidates-against-aeromonas-salmonicida-in-rainbow-trout-oncorhynchus-mykiss
#9
Moonika Haahr Marana, Louise von Gersdorff Jørgensen, Jakob Skov, Jiwan Kumar Chettri, Andreas Holm Mattsson, Inger Dalsgaard, Per Walter Kania, Kurt Buchmann
Aeromonas salmonicida subsp. salmonicida is the etiological agent of furunculosis and a major fish health problem in salmonid aquaculture worldwide. Injection vaccination with commercial mineral oil-adjuvanted bacterin vaccines has been partly successful in preventing the disease but in Danish rainbow trout (Oncorhynchus mykiss, Walbaum) aquaculture furunculosis outbreaks still occur. In this study we tested the efficacy of experimental subunit vaccines against A. salmonicida infection in rainbow trout. We utilized in silico screening of the proteome of A...
2017: PloS One
https://www.readbyqxmd.com/read/28173829/cloning-expression-and-molecular-characterization-of-a-cystoisospora-suis-specific-uncharacterized-merozoite-protein
#10
Aruna Shrestha, Nicola Palmieri, Ahmed Abd-Elfattah, Bärbel Ruttkowski, Marc Pagès, Anja Joachim
BACKGROUND: The genome of the apicomplexan parasite Cystoisospora suis (syn. Isospora suis) has recently been sequenced and annotated, opening the possibility for the identification of novel therapeutic targets against cystoisosporosis. It was previously proposed that a 42 kDa uncharacterized merozoite protein, encoded by gene CSUI_005805, might be a relevant vaccine candidate due to its high immunogenic score, high expression level and species-specificity as determined in silico. METHODS: The 1170 bp coding sequence of the CSUI_005805 gene was PCR amplified and cloned into the bacterial expression vector pQE-31...
February 7, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28163699/a-systematic-review-of-in-vitro-and-in-vivo-activities-of-anti-toxoplasma-drugs-and-compounds-2006-2016
#11
REVIEW
Mahbobeh Montazeri, Mehdi Sharif, Shahabeddin Sarvi, Saeed Mehrzadi, Ehsan Ahmadpour, Ahmad Daryani
The currently available anti-Toxoplasma agents have serious limitations. This systematic review was performed to evaluate drugs and new compounds used for the treatment of toxoplasmosis. Data was systematically collected from published papers on the efficacy of drugs/compounds used against Toxoplasma gondii (T. gondii) globally during 2006-2016. The searched databases were PubMed, Google Scholar, Science Direct, ISI Web of Science, EBSCO, and Scopus. One hundred and eighteen papers were eligible for inclusion in this systematic review, which were both in vitro and in vivo studies...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28163168/experimental-animal-modelling-for-tb-vaccine-development
#12
REVIEW
Pere-Joan Cardona, Ann Williams
Research for a novel vaccine to prevent tuberculosis is an urgent medical need. The current vaccine, BCG, has demonstrated a non-homogenous efficacy in humans, but still is the gold standard to be improved upon. In general, the main indicator for testing the potency of new candidates in animal models is the reduction of the bacillary load in the lungs at the acute phase of the infection. Usually, this reduction is similar to that induced by BCG, although in some cases a weak but significant improvement can be detected, but none of candidates are able to prevent establishment of infection...
February 3, 2017: International Journal of Infectious Diseases: IJID
https://www.readbyqxmd.com/read/28148799/computational-prediction-of-the-heterodimeric-and-higher-order-structure-of-gpe1-gpe2-envelope-glycoproteins-encoded-by-the-hepatitis-c-virus-hcv
#13
Holly Freedman, Michael R Logan, Darren Hockman, Julia Koehler Leman, John Lok Man Law, Michael Houghton
: Despite the recent success of newly developed direct acting antivirals against Hepatitis C, the disease continues to be a global health threat due to lack of diagnosis of most carriers and the high cost of treatment. The heterodimer formed by the glycoproteins E1 and E2 within the hepatitis C virus (HCV) lipid envelope is a potential vaccine candidate and antiviral target. While the structure of E1/E2 has not yet been resolved, partial crystal structures of the E1 and E2 ectodomains have been determined...
February 1, 2017: Journal of Virology
https://www.readbyqxmd.com/read/28135270/optimal-sequential-immunization-can-focus-antibody-responses-against-diversity-loss-and-distraction
#14
Shenshen Wang
Affinity maturation is a Darwinian process in which B lymphocytes evolve potent antibodies to encountered antigens and generate immune memory. Highly mutable complex pathogens present an immense antigenic diversity that continues to challenge natural immunity and vaccine design. Induction of broadly neutralizing antibodies (bnAbs) against this diversity by vaccination likely requires multiple exposures to distinct but related antigen variants, and yet how affinity maturation advances under such complex stimulation remains poorly understood...
January 2017: PLoS Computational Biology
https://www.readbyqxmd.com/read/28108656/functionally-interdependent-shape-switching-nanoparticles-with-controllable-properties
#15
Justin R Halman, Emily Satterwhite, Brandon Roark, Morgan Chandler, Mathias Viard, Anna Ivanina, Eckart Bindewald, Wojciech K Kasprzak, Martin Panigaj, My N Bui, Jacob S Lu, Johann Miller, Emil F Khisamutdinov, Bruce A Shapiro, Marina A Dobrovolskaia, Kirill A Afonin
We introduce a new concept that utilizes cognate nucleic acid nanoparticles which are fully complementary and functionally-interdependent to each other. In the described approach, the physical interaction between sets of designed nanoparticles initiates a rapid isothermal shape change which triggers the activation of multiple functionalities and biological pathways including transcription, energy transfer, functional aptamers and RNA interference. The individual nanoparticles are not active and have controllable kinetics of re-association and fine-tunable chemical and thermodynamic stabilities...
January 20, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/28106282/prediction-of-pan-specific-b-cell-epitopes-from-nucleocapsid-protein-of-hantaviruses-causing-hantavirus-cardiopulmonary-syndrome
#16
Sagadevan Kalaiselvan, Sathish Sankar, Mageshbabu Ramamurthy, Asit Ranjan Ghosh, Balaji Nandagopal, Gopalan Sridharan
Hantaviruses are emerging viral pathogens that causes hantavirus cardiopulmonary syndrome in the Americas (HCPS), a severe, sometimes fatal, respiratory disease in humans with a case fatality rate of ≥50%. IgM and IgG based serological detection methods are the most common approaches used for laboratory diagnosis of hantaviruses. Such emerging viral pathogens emphasizes the need for improved rapid diagnostic devices and vaccines incorporating pan-specific epitopes of genotypes. We predicted linear B-cell epitopes for hantaviruses that are specific to genotypes causing HCPS in humans using in silico prediction servers...
January 20, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28091882/identification-of-some-main-streptococcus-iniae-associated-proteins-relationship
#17
Fatima El Aamri, José Ángel Guillén, Daniel Padilla, Félix Acosta, Fernando Real
The surface-associated proteins play a key role in bacterial physiology and pathogenesis, and are the major targets in the development of new vaccines. These proteins contribute to the adaptation of bacteria to different hosts and environments. To study differences at the genomic level, we first sequenced the whole genome of Streptococcus iniae from fish (IUSA-1 strain) and compared it to Streptococcus iniae from human (9117 strain), revealing a high similitude between both strains. To gain further insights into host- and environment-specific differences, we then studied proteins in silico and by High Performance Liquid Chromatography...
January 14, 2017: Veterinary Research Communications
https://www.readbyqxmd.com/read/28089770/structural-pierce-into-molecular-mechanism-underlying-clostridium-perfringens-epsilon-toxin-function
#18
Saeed Khalili, Abolfazl Jahangiri, Zahra Sadat Hashemi, Bahman Khalesi, Maysam Mard-Soltani, Jafar Amani
Epsilon toxin of the Clostridium perfringens garnered a lot of attention due to its potential for toxicity in humans, extreme potency for cytotoxicity in mice and lack of any approved therapeutics prescribed for human. However, the intricacies of the Epsilon toxin action mechanism are yet to be understood. In this regard, various in silico tools have been exploited to model and refine the 3D structure of the toxin and its two receptors. The receptor proteins were embedded into designed lipid membranes within an aqueous and ionized environment...
January 12, 2017: Toxicon: Official Journal of the International Society on Toxinology
https://www.readbyqxmd.com/read/28087198/cloning-characterization-and-transmission-blocking-potential-of-midgut-carboxypeptidase-a-in-anopheles-stephensi
#19
V VenkatRao, Surendra K Kumar, P Sridevi, Vijaykumar Yogesh Muley, R K Chaitanya
Transmission-blocking vaccines (TBV) interrupt malaria parasite transmission and hence form an important component for malaria eradication. Mosquito midgut exopeptidases such as aminopeptidase N & carboxypeptidase B have demonstrated TBV potential. In the present study, we cloned and characterized carboxypeptidase A (CPA) from the midgut of an important malarial vector, Anopheles stephensi. ClustalW amino acid alignment and in silico 3-dimensional structure analysis of CPA predicted the presence of active sites involved in zinc and substrate binding that are conserved among all the known mosquito species...
January 10, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28070829/functional-analysis-of-kif20a-a-potential-immunotherapeutic-target-for-glioma
#20
Katsuya Saito, Shigeki Ohta, Yutaka Kawakami, Kazunari Yoshida, Masahiro Toda
Kinesin family member 20A (KIF20A), an ideal cancer-testis antigen, was reported to be a promising immunotherapeutic target for pancreatic cancers. Clinical trials of KIF20A peptide vaccine immunotherapy have been conducted against pancreatic cancers. To demonstrate the efficacy of KIF20A as a candidate molecular target for gliomas, we analyzed the expression and function of KIF20A in gliomas. Western blot and quantitative PCR analyses showed that KIF20A expression in glioma cell lines and glioma tissues was high compared with that found in a normal brain...
January 9, 2017: Journal of Neuro-oncology
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