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https://www.readbyqxmd.com/read/29328884/evaluation-of-g2-citric-acid-based-dendrimer-as-an-adjuvant-in-veterinary-rabies-vaccine
#1
Vahid Asgary, Alireza Shoari, Majid Afshar Moayad, Mehdi Shafiee Ardestani, Razieh Bigdeli, Leila Ghazizadeh, Mohammad Sadeq Khosravy, Erfan Panahnejad, Alireza Janani, Rouzbeh Bashar, Maliheh Abedi, Reza Ahangari Cohan
For induction of an appropriate immune response, especially in the case of an inactivated vaccine, the use of an adjuvant is crucial. In this study, adjuvanticity effect of G2 dendrimer in veterinary rabies vaccine has been investigated. A nonlinear globular G2 dendrimer comprising citric acid and polyethylene glycol 600 (PEG-600) was synthesized and the toxicity was studied in vitro on the J774A.1 cell line. The adjuvanticity effect of the dendrimer was then investigated on rabies virus in NMRI mice as a model...
January 2018: Viral Immunology
https://www.readbyqxmd.com/read/29325699/co-delivery-of-tumor-antigen-and-dual-toll-like-receptor-ligands-into-dendritic-cell-by-silicon-microparticle-enables-efficient-immunotherapy-against-melanoma
#2
Motao Zhu, Xilai Ding, Ruifang Zhao, Xuewu Liu, Haifa Shen, Chunmei Cai, Mauro Ferrari, Helen Y Wang, Rong-Fu Wang
Despite the importance and promise of cancer vaccines for broader prevention and treatment of cancer, limited clinical responses are observed, suggesting that key rational designs are required for inducing potent immune responses against cancer. Here we report a mesoporous silicon vector (MSV) as a multi-functional microparticle for formulating an efficient cancer vaccine composed of B16 melanoma derived-tyrosinase related protein 2 (TRP2) peptide and dual toll-like receptor (TLR) agonists. We demonstrated that MSV microparticles protected the peptide from rapid degradation for prolonged antigen presentation to immune cells...
January 8, 2018: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/29324304/injectable-polypeptide-hydrogel-for-dual-delivery-of-antigen-and-tlr3-agonist-to-modulate-dendritic-cells-in%C3%A2-vivo-and-enhance-potent-cytotoxic-t-lymphocyte-response-against-melanoma
#3
Huijuan Song, Pingsheng Huang, Jinfeng Niu, Gaona Shi, Chuangnian Zhang, Deling Kong, Weiwei Wang
Transplantation of immune cells manipulated in vitro to dictate immune responses in the body is promising in cancer immunotherapy. However, this approach suffers from low cell survival after administration, insufficient cell homing to lymph nodes, and off-target. Here we demonstrate an injectable and self-assembled poly(l-valine) hydrogel as the delivery carrier of cargoes including antigen and immunopotentiator for DCs modulation. Our results indicate the vaccine formulation composed of tumor cell lysates (TCL), TLR3 agonist, poly(I:C) and polypeptide hydrogel can robustly recruit, activate and mature DCs in vitro and in vivo by sustained release of TCL and poly(I:C)...
January 3, 2018: Biomaterials
https://www.readbyqxmd.com/read/29324238/immunization-with-recombinant-flid-confers-protection-against-helicobacter-pylori-infection-in-mice
#4
Amir Ghasemi, Nazanin Mohammad, Josef Mautner, Mehrnaz Taghipour Karsabet, Abolfazl Ardjmand, Rezvan Moniri
Nearly half of the world's population is infected with Helicobacter pylori. Clinical manifestations of this infection range from gastritis and peptic ulcers to gastric adenocarcinoma and lymphoma. Due to the emerging of antibiotic resistant strains and poor patient compliance of the antibiotic therapy, there is increasing interest in the development of a protective vaccine against H. pylori infection. The bacterial protein FliD forms a capping structure on the end of each flagellum which is critical to prevent depolymerization and structural degradation...
January 8, 2018: Molecular Immunology
https://www.readbyqxmd.com/read/29321075/a-phase-i-open-label-trial-on-the-safety-and-immunogenicity-of-the-adjuvanted-tuberculosis-subunit-vaccine-h1-ic31%C3%A2-in-people-living-in-a-tb-endemic-area
#5
Jemal Hussein, Martha Zewdie, Lawrence Yamuah, Ahmed Bedru, Markos Abebe, Alemnew F Dagnew, Menberework Chanyalew, Asfawesen G Yohannes, Jemal Ahmed, Howard Engers, T Mark Doherty, Peter Bang, Ingrid Kromann, Søren T Hoff, Abraham Aseffa
BACKGROUND: H1/IC31® is a tuberculosis (TB) subunit vaccine candidate consisting of the fusion protein of Ag85B and ESAT-6 (H1) formulated with the IC31® adjuvant. Previous trials have reported on the H1/IC31® vaccine in M. tuberculosis (Mtb)-naïve, BCG-vaccinated and previously Mtb-infected individuals. In this trial, conducted between December 2008 and April 2010, the safety and immunogenicity of H1/IC31® was assessed in participants living in Ethiopia - a highly TB-endemic area...
January 10, 2018: Trials
https://www.readbyqxmd.com/read/29317873/construction-and-identification-of-a-recombinant-plasmid-encoding-echinococcus-granulosus-oncosphere-antigen-eg95
#6
Nahideh Mazaheri, Abdolhossein Dalimi, Majid Pirestani, Farnoosh Jameie, Mehdi Mohebali, Mohamad Bagher Rokni
Background: Cystic echinococcosis (CE), as a zoonotic disease cause to health threat and economic losses. Despite implemented control programs, few countries have been able to decrease or eliminate this infection. Vaccination of the intermediate host offers an additional strategy to control the parasite transmission and EG95 antigen is considered more than the others in the vaccine issue. According to the high protection induced by the EG95 recombinant vaccine, this study was designed to construct recombinant plasmid formulation of EG95 antigen...
October 2017: Iranian Journal of Parasitology
https://www.readbyqxmd.com/read/29317163/investigations-into-the-efficacy-of-multi-component-cocaine-vaccines
#7
Atsushi Kimishima, Margaret E Olson, Kim D Janda
Although cocaine addiction remains a serious health and societal problem in the United States, no FDA-approved treatment has been developed. Vaccines offer an exciting strategy for the treatment of cocaine addiction; however, vaccine formulations need to be optimized to improve efficacy. Herein, we examine the effectiveness of a tricomponent cocaine vaccine, defined as having its hapten (GNE) and adjuvant (cytosine-guanine oligodeoxynucleotide 1826, CpG ODN 1826) covalently linked via the immunogenic protein ovalbumin (OVA)...
December 20, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/29317110/cationic-liposomes-formulated-with-a-novel-whole-leishmania-lysate-wll-as-a-vaccine-for-leishmaniasis-in-murine-model
#8
Iman Jafari, Vahid Heravi Shargh, Maryam Shahryari, Azam Abbasi, Mahmoud Reza Jaafari, Ali Khamesipour, Ali Badiee
Although there have been numerous attempts to develop a successful vaccine against leishmaniasis, based on the clinical trial in this field, no vaccine against Leishmania in routine way can be found for globally effective vaccination in human. Amongst, first generation vaccines consisting of parasite fractions or whole killed Leishmania showed more successful results in clinical trials. It seems that the main reason for the low efficacy of these vaccines is lack of a suitable adjuvant. In this study, a crude extract of detergent-solubilized L...
December 28, 2017: Immunobiology
https://www.readbyqxmd.com/read/29316978/in-vivo-testing-of-novel-vaccine-prototypes-against-actinobacillus-pleuropneumoniae
#9
Fabio Antenucci, Cyrielle Fougeroux, Alannah Deeney, Cathrine Ørskov, Andrew Rycroft, Peter Johannes Holst, Anders Miki Bojesen
Actinobacillus pleuropneumoniae (A. pleuropneumoniae) is a Gram-negative bacterium that represents the main cause of porcine pleuropneumonia in pigs, causing significant economic losses to the livestock industry worldwide. A. pleuropneumoniae, as the majority of Gram-negative bacteria, excrete vesicles from its outer membrane (OM), accordingly defined as outer membrane vesicles (OMVs). Thanks to their antigenic similarity to the OM, OMVs have emerged as a promising tool in vaccinology. In this study we describe the in vivo testing of several vaccine prototypes for the prevention of infection by all known A...
January 9, 2018: Veterinary Research
https://www.readbyqxmd.com/read/29315762/effect-of-apoptosis-associated-speck-like-protein-containing-a-caspase-recruitment-domain-on-vaccine-efficacy-overcoming-the-effects-of-its-deficiency-with-aluminum-hydroxide-adjuvant
#10
Deuk-Ki Lee, Eun-Young Lee, Ryoon-Ho Kim, Hye-Won Kwak, Joo Young Kim, Hun Kim, Kyung-Won Kang, Sang-Myeong Lee, Jong-Hwan Park, Jun Chang, Jae-Hwan Nam
Host factors such as nutritional status and immune cell state are important for vaccine efficacy. Inflammasome activation may be important for triggering vaccine-induced humoral and cell-mediated immune responses. Formulations with alum as a typical adjuvant to overcome the effects of host factors have recently been shown to induce inflammasome activation, which augments vaccine efficacy. Apoptosis-associated speck-like protein containing a caspase recruitment domain (ASC) is one of main components of inflammasomes, but it is not clear whether ASC affects the vaccine-induced immune response...
January 8, 2018: Microbiology and Immunology
https://www.readbyqxmd.com/read/29313255/subcutaneous-administration-cpg-odns-acts-as-a-potent-adjuvant-for-an-hiv-1-tat-based-vaccine-candidate-to-elicit-cellular-immunity-in-balb-c-mice
#11
Zeinab Panahi, Asghar Abdoli, Ghasem Mosayebi, Mehdi Mahdavi, Fariborz Bahrami
OBJECTIVE: To evaluate the combined effects of CpG oligodeoxynucleotides (CpG-ODNs) adjuvant and subcutaneous injection route on efficacy of a HIV-1-tat DNA vaccine candidate using BALB/c mice as an animal model. RESULTS: Evaluation of cellular and humoral immunity of mice injected subcutaneously with HIV-1-tat gene cloned into a pcDNA3.1 vector indicated that significant levels of IFN-γ cytokine secretion (900 pg/ml), lymphocyte proliferation (2.5 stimulation index) and IgG2a (1...
January 8, 2018: Biotechnology Letters
https://www.readbyqxmd.com/read/29311242/vaccine-linked-chemotherapy-improves-benznidazole-efficacy-for-acute-chagas-disease
#12
Kathryn Jones, Leroy Versteeg, Ashish Damania, Brian Keegan, April Kendricks, Jeroen Pollet, Julio Vladimir Cruz-Chan, Fabian Gusovsky, Peter J Hotez, Maria Elena Bottazzi
Chagas disease affects 6-7 million people worldwide, resulting in significant disease burdens and healthcare costs in endemic countries. Chemotherapeutic treatment is restricted to two parasiticidal drugs benznidazole and nifurtimox. Both drugs are highly effective during acute disease, but are only minimally effective during chronic disease and fraught with significant adverse clinical effects. In experimental models, vaccines can be used to induce parasite specific balanced TH1/TH2 immune responses that effectively reduce parasite burdens and associated inflammation while minimizing adverse effects...
January 8, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29311235/deletion-of-the-mfs-transporter-fptb-alters-host-cell-interactions-and-attenuates-the-virulence-of-type-a-francisella-tularensis
#13
Phillip M Balzano, Aimee L Cunningham, Christen Grassel, Eileen M Barry
Francisella tularensis is a Gram negative facultative intracellular coccobacillus that can infect a wide variety of hosts. In humans, F. tularensis causes the zoonosis tularemia following insect bites, ingestion, inhalation, and the handling of infected animals. That a very small inoculum delivered by the aerosol route can cause severe disease, coupled with the possibility of its use as an aerosolized bioweapon, have led to the classification of Francisella tularensis as a Category A select agent and has renewed interest in the formulation of a vaccine...
January 8, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29311233/characterization-and-protective-efficacy-of-type-three-secretion-proteins-as-a-broadly-protective-subunit-vaccine-against-salmonella-enterica-serovars
#14
Francisco J Martinez-Becerra, Prashant Kumar, Vikalp Vishwakarma, Jae Hyun Kim, Olivia Arizmendi, C Russell Middaugh, William D Picking, Wendy L Picking
Non-typhoidal Salmonella enterica serotypes (NTS) are the leading cause of hospitalization and death due to foodborne illnesses. NTS are the costliest of the foodborne pathogens and cause ∼$4 billion annually in healthcare costs. In Africa, new invasive NTS are the leading cause of bacteremia especially in HIV-positive children and adults. Current vaccines against S. enterica are not broadly protective and most are directed at the typhoid causing serotypes, not the NTS. All S. enterica require two type III secretion systems (T3SS) for virulence...
January 8, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29300463/targeted-strategies-for-mucosal-vaccination
#15
Stephanie Longet, Mimmi L E Lundahl, Ed Lavelle
Mucosal immune responses are in the first line of defence against most infections and protective mucosal immunity can be achieved by mucosal vaccination. However, mucosal tolerance and physicochemical features of the mucosal environment pose challenging obstacles to the development of mucosal vaccines. Vaccine formulations must be designed to enhance stability at the mucosae and incorporate features that induce innate immunity at mucosal inductive sites. To face these challenges, a number of novel delivery systems for targeting of mucosal vaccines to specific mucosal locations have been developed...
January 4, 2018: Bioconjugate Chemistry
https://www.readbyqxmd.com/read/29300052/exploiting-the-pliability-and-lateral-mobility-of-pickering-emulsion-for-enhanced-vaccination
#16
Yufei Xia, Jie Wu, Wei Wei, Yiqun Du, Tao Wan, Xiaowei Ma, Wenqi An, Aiying Guo, Chunyu Miao, Hua Yue, Shuoguo Li, Xuetao Cao, Zhiguo Su, Guanghui Ma
A major challenge in vaccine formulations is the stimulation of both the humoral and cellular immune response for well-defined antigens with high efficacy and safety. Adjuvant research has focused on developing particulate carriers to model the sizes, shapes and compositions of microbes or diseased cells, but not antigen fluidity and pliability. Here, we develop Pickering emulsions-that is, particle-stabilized emulsions that retain the force-dependent deformability and lateral mobility of presented antigens while displaying high biosafety and antigen-loading capabilities...
January 4, 2018: Nature Materials
https://www.readbyqxmd.com/read/29298677/the-variome-of-pneumococcal-virulence-factors-and-regulators
#17
Gustavo Gámez, Andrés Castro, Alejandro Gómez-Mejia, Mauricio Gallego, Alejandro Bedoya, Mauricio Camargo, Sven Hammerschmidt
BACKGROUND: In recent years, the idea of a highly immunogenic protein-based vaccine to combat Streptococcus pneumoniae and its severe invasive infectious diseases has gained considerable interest. However, the target proteins to be included in a vaccine formulation have to accomplish several genetic and immunological characteristics, (such as conservation, distribution, immunogenicity and protective effect), in order to ensure its suitability and effectiveness. This study aimed to get comprehensive insights into the genomic organization, population distribution and genetic conservation of all pneumococcal surface-exposed proteins, genetic regulators and other virulence factors, whose important function and role in pathogenesis has been demonstrated or hypothesized...
January 3, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29298302/characterization-of-a-candidate-tetravalent-vaccine-based-on-2-o-methyltransferase-mutants
#18
Roland Züst, Shi-Hua Li, Xuping Xie, Sumathy Velumani, Melissa Chng, Ying-Xiu Toh, Jing Zou, Hongping Dong, Chao Shan, Jassia Pang, Cheng-Feng Qin, Evan W Newell, Pei-Yong Shi, Katja Fink
Dengue virus (DENV) is one of the most widespread arboviruses. The four DENV serotypes infect about 400 million people every year, causing 96 million clinical dengue cases, of which approximately 500'000 are severe and potentially life-threatening. The only licensed vaccine has a limited efficacy and is only recommended in regions with high endemicity. We previously reported that 2'-O-methyltransferase mutations in DENV-1 and DENV-2 block their capacity to inhibit type I IFNs and render the viruses attenuated in vivo, making them amenable as vaccine strains; here we apply this strategy to all four DENV serotypes to generate a tetravalent, non-chimeric live-attenuated dengue vaccine...
2018: PloS One
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
#19
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/29296883/innate-transcriptional-effects-by-adjuvants-on-the-magnitude-quality-and-durability-of-hiv-envelope-responses-in-nhps
#20
Joseph R Francica, Daniel E Zak, Caitlyn Linde, Emilio Siena, Carrie Johnson, Michal Juraska, Nicole L Yates, Bronwyn Gunn, Ennio De Gregorio, Barbara J Flynn, Nicholas M Valiante, Padma Malyala, Susan W Barnett, Pampi Sarkar, Manmohan Singh, Siddhartha Jain, Margaret Ackerman, Munir Alam, Guido Ferrari, Georgia D Tomaras, Derek T O'Hagan, Alan Aderem, Galit Alter, Robert A Seder
Adjuvants have a critical role for improving vaccine efficacy against many pathogens, including HIV. Here, using transcriptional RNA profiling and systems serology, we assessed how distinct innate pathways altered HIV-specific antibody responses in nonhuman primates (NHPs) using 8 clinically based adjuvants. NHPs were immunized with a glycoprotein 140 HIV envelope protein (Env) and insoluble aluminum salts (alum), MF59, or adjuvant nanoemulsion (ANE) coformulated with or without Toll-like receptor 4 (TLR4) and 7 agonists...
November 28, 2017: Blood Advances
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