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vaccine adjuvants

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https://www.readbyqxmd.com/read/29053938/development-of-a-nanogel-based-nasal-vaccine-as-a-novel-antigen-delivery-system
#1
Rika Nakahashi-Ouchida, Yoshikazu Yuki, Hiroshi Kiyono
Nasal vaccination is one of the most effective immunization methods because it can induce effective antigen-specific immune responses not only at the mucosal site of administration but also at distant mucosal surfaces, as well as in the systemic compartment. Based on this advantage, many nasal vaccines are being developed and some have been licensed and marketed for clinical use. However, some have been withdrawn because of unacceptable adverse events such as inactivated influenza vaccine administrated with a heat-labile enterotoxin of Escherichia coli as an adjuvant...
October 20, 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/29052227/adjuvant-pretreatment-with-alum-protects-neonatal-mice-in-sepsis-through-myeloid-cell-activation
#2
Jaimar C Rincon, Angela L Cuenca, Steven L Raymond, Brittany Mathias, Dina C Nacionales, Ricardo Ungaro, Philip A Efron, James L Wynn, Lyle L Moldawer, Shawn D Larson
The high mortality in neonatal sepsis has been related to both quantitative and qualitative differences in host protective immunity. Especially in the premature neonate where outcomes from sepsis are so dismal, pretreatment strategies to prevent sepsis have received inadequate consideration. Aluminum-based adjuvants (alum) are currently used in many pediatric vaccines, but their use as an innate immune stimulant alone has not been well studied. We asked whether pre-treatment with alum adjuvant alone could improve outcome and host innate immunity in neonatal mice given polymicrobial sepsis...
October 20, 2017: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/29051851/biomimetically-engineered-demi-bacteria-potentiate-vaccination-against-cancer
#3
Dezhi Ni, Shuang Qing, Hui Ding, Hua Yue, Di Yu, Shuang Wang, Nana Luo, Zhiguo Su, Wei Wei, Guanghui Ma
Failure in enhancing antigen immunogenicity has limited the development of cancer vaccine. Inspired by effective immune responses toward microorganisms, demi-bacteria (DB) from Bacillus are engineered as carriers for cancer vaccines. The explored hydrothermal treatment enables the Bacillus to preserve optimal pathogen morphology with intrinsic mannose receptor agonist. Meanwhile, the treated Bacillus can be further endowed with ideal hollow/porous structure for efficient accommodation of antigen and adjuvant, such as CpG...
October 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/29050282/effective-antitumor-peptide-vaccines-can-induce-severe-autoimmune-pathology
#4
Hussein Sultan, Jimena Trillo-Tinoco, Paulo Rodriguez, Esteban Celis
Immunotherapy has shown a tremendous success in treating cancer. Unfortunately, this success is frequently associated with severe autoimmune pathology. In this study, we used the transgenic RIP-gp mouse model to assess the antitumor therapeutic benefit of peptide vaccination while evaluating the possible associated autoimmune pathology. We report that palmitoylated gp33-41 peptide and poly-IC adjuvant vaccine (BiVax) generated ∼ 5-10 % of antigen specific T cell responses in wild type and supposedly immune tolerant RIP-gp mice...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29048721/the-immune-profile-induced-is-crucial-to-determine-the-effects-of-immunocastration-over-gonadal-function-fertility-and-gnrh-i-expression
#5
Daniela Siel, Alexandra Loaiza, Sonia Vidal, Mario Caruffo, Rodolfo Paredes, Galia Ramirez, Lisette Lapierre, Cristóbal Briceño, Oliver Pérez, Leonardo Sáenz
PROBLEM: Immunocastration or vaccination against the GnRH-I hormone is a promising alternative to reproductive control in different animal species. Given the low immunogenicity of this hormone, the use of adjuvants becomes necessary. METHOD OF STUDY: This study evaluated the effects of three adjuvants that induce different immune response profiles over gonadal function, fertility, and expression of GnRH-I. Female mice (n = 6) were vaccinated at days 1 and 30 with a recombinant antigen for immunocastration and different adjuvants that induced preferentially Th1/Th2, Th2, and Th1 immune profiles...
October 19, 2017: American Journal of Reproductive Immunology: AJRI
https://www.readbyqxmd.com/read/29046894/fatty-acid-mimetic-micelles-for-dual-delivery-of-antigens-and-imidazoquinoline-adjuvants
#6
Sema Sevimli, Frances C Knight, Pavlo Gilchuk, Sebastian Joyce, John T Wilson
Vaccine design has undergone a shift towards the use of purified protein subunit vaccines, which offer increased safety and greater control over antigen specificity, but at the expense of immunogenicity. Here we report the development of a new polymer-based vaccine delivery platform engineered to enhance immunity through the co-delivery of protein antigens and the Toll-like receptor 7 (TLR7) agonist imiquimod (IMQ). Owing to the preferential solubility of IMQ in fatty acids, a series of block copolymer micelles with a fatty acid-mimetic core comprising lauryl methacrylate (LMA) and methacrylic acid (MAA), and a poly(ethylene glycol) methyl ether methacrylate (PEGMA) corona decorated with pyridyl disulfide ethyl methacrylate (PDSM) moieties for antigen conjugation were synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization...
February 13, 2017: ACS Biomaterials Science & Engineering
https://www.readbyqxmd.com/read/29045910/immunogenicity-and-protective-efficacy-of-multistage-vaccine-candidates-mtb8-4-hspx-and-hspx-mtb8-4-against-mycobacterium-tuberculosis-infection-in-mice
#7
Wanbo Liu, Jingjing Li, Hongxia Niu, Xiaofa Lin, Ruiying Li, Yue Wang, Qi Xin, Hongjuan Yu, Yumin Wu, Bingdong Zhu, Jiying Tan
In this study, Mtb8.4 and HspX, which are expressed at proliferating and dormant stages of Mycobacterium tuberculosis (M. tuberculosis), respectively, were chosen to construct two fusion proteins, Mtb8.4-HspX (8.4H) and HspX-Mtb8.4 (H8.4), and we investigated whether the antigen dose and protein sequential order could impact the immunogenicity and protective efficacy of these fusion protein vaccines against M. tuberculosis. C57BL/6 mice were vaccinated with new constructions containing a fusion protein with adjuvant of N, N'-dimethyl-N, N'-dioctadecylammonium bromide (DDA) or a mixed adjuvant composed of DDA, polyribocytidylic acid and gelatin (DPG), and the antigen specific immune responses and protective efficacy against M...
October 15, 2017: International Immunopharmacology
https://www.readbyqxmd.com/read/29045781/development-of-clickable-monophosphoryl-lipid-as-towards-semi-synthetic-conjugates-with-tumor-associated-carbohydrate-antigens
#8
Marcello Ziaco, Sabina Górska, Serena Traboni, Agnieszka Maria Razim, Angela Casillo, Alfonso Iadonisi, Andrzej Gamian, Maria Michela Corsaro, Emiliano Bedini
A semi-synthetic strategy for the obtainment of monophosphoryl lipid A derivatives equipped with clickable (azide, alkyne, double bond, a thiol precursor) moieties, starting from the native lipid A isolated from Escherichia coli, is here presented. These lipid A derivatives can be conjugated with other interesting biomolecules, such as tumor-associated carbohydrate antigens (TACAs). In this way, the immunostimulant activity of monophosphoryl lipid A can significantly improve the immunogenicity of TACAs, thus opening an access to potential self-adjuvant anticancer vaccine candidates...
October 18, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29045755/the-triforc-database-a-comprehensive-up-to-date-resource-of-plant-triterpene-biosynthesis
#9
Karel Miettinen, Sabrina Iñigo, Lukasz Kreft, Jacob Pollier, Christof De Bo, Alexander Botzki, Frederik Coppens, S Ren Bak, Alain Goossens
Triterpenes constitute a large and important class of plant natural products with diverse structures and functions. Their biological roles range from membrane structural components over plant hormones to specialized plant defence compounds. Furthermore, triterpenes have great potential for a variety of commercial applications such as vaccine adjuvants, anti-cancer drugs, food supplements and agronomic agents. Their biosynthesis is carried out through complicated, branched pathways by multiple enzyme types that include oxidosqualene cyclases, cytochrome P450s, and UDP-glycosyltransferases...
October 17, 2017: Nucleic Acids Research
https://www.readbyqxmd.com/read/29045460/conjugated-nanoliposome-with-the-her2-neu-derived-peptide-gp2-as-an-effective-vaccine-against-breast-cancer-in-mice-xenograft-model
#10
Atefeh Razazan, Javad Behravan, Atefeh Arab, Nastaran Barati, Leila Arabi, Zahra Gholizadeh, Mahdi Hatamipour, Amin Reza Nikpoor, Amir Abbas Momtazi-Borojeni, Fatemeh Mosaffa, Mohamad Hosein Ghahremani, Mahmoud Reza Jaafari
One of the challenging issues in vaccine development is peptide and adjuvant delivery into target cells. In this study, we developed a vaccine and therapeutic delivery system to increase cytotoxic T lymphocyte (CTL) response against a breast cancer model overexpressing HER2/neu. Gp2, a HER2/neu-derived peptide, was conjugated to Maleimide-mPEG2000-DSPE micelles and post inserted into liposomes composed of DMPC, DMPG phospholipids, and fusogenic lipid dioleoylphosphatidylethanolamine (DOPE) containing monophosphoryl lipid A (MPL) adjuvant (DMPC-DMPG-DOPE-MPL-Gp2)...
2017: PloS One
https://www.readbyqxmd.com/read/29043774/augmenting-influenza-specific-t-cell-memory-generation-with-a-nkt-cell-dependent-glycolipid-peptide-vaccine
#11
Regan J Anderson, Jasmine Li, Lukasz Kedzierski, Benjamin J Compton, Colin M Hayman, Taryn L Osmond, Ching-Wen Tang, Kathryn J Farrand, Hui-Fern Koay, Catarina Filipa Dos Santos Sa E Almeida, Lauren R Holz, Geoffrey M Williams, Margaret A Brimble, Zhongfang Wang, Marios Koutsakos, Katherine Kedzierska, Dale I Godfrey, Ian F Hermans, Stephen J Turner, Gavin F Painter
The development of a universal vaccine for influenza A virus (IAV) that does not require seasonal modification is a long-standing health goal, particularly in the context of the increasing threat of new global pandemics. Vaccines that specifically induce T cell responses are of considerable interest because they can target viral proteins that are more like-ly to be shared between different virus strains and subtypes and hence provide effective cross-reactive IAV immunity. From a practical perspective, such vaccines should induce T cell responses with long-lasting memory, while also being simple to manufacture and cost-effective...
October 18, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/29042772/erratum-polyethylenimine-based-micro-nanoparticles-as-vaccine-adjuvants-corrigendum
#12
(no author information available yet)
[This corrects the article on p. 5443 in vol. 12, PMID: 28814862.].
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/29042573/efficient-induction-of-comprehensive-immune-responses-to-control-pathogenic-e-coli-by-clay-nano-adjuvant-with-the-moderate-size-and-surface-charge
#13
Weiyu Chen, Huali Zuo, Timothy J Mahony, Bing Zhang, Barbara Rolfe, Zhi Ping Xu
In recent decades, diseases caused by pathogenic Escherichia coli (E. coli), enterohaemorrhagic E. coli (EHEC) O26 have been increasingly reported worldwide, which are as severe as those caused by EHEC strain O157:H7 and require effective intervention strategies. Herein, we report the application of clay nanoparticles, i.e. hectorites as effective nano-adjuvants for vaccination against EHEC O26 colonization. We show that medium size HEC (hectorite, around 73~77 nm diameter) is able to induce efficient humoral and cellular immune responses against EHEC antigen - intimin β (IB), which are significantly higher than those triggered by commercially used adjuvants - QuilA and Alum...
October 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29039103/analysis-of-nanoparticle-adjuvant-properties-in-vivo
#14
Barry W Neun, Marina A Dobrovolskaia
Nanoparticles can be engineered for targeted antigen delivery to the immune cells and for stimulating the immune response to improve the antigen immunogenicity. This approach is commonly used to develop nanotechnology-based vaccines. In addition, some nanotechnology platforms may be initially designed for drug delivery, but in the course of subsequent characterization, their additional immunomodulatory functions may be discovered that can potentially benefit vaccine efficacy. In both of these scenarios, an in vivo proof of concept study to verify the utility of the nanocarrier for improving vaccine efficacy is needed...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29039099/assessing-nlrp3-inflammasome-activation-by-nanoparticles
#15
Bhawna Sharma, Christopher B McLeland, Timothy M Potter, Stephan T Stern, Pavan P Adiseshaiah
NLRP3 inflammasome activation is one of the initial steps in an inflammatory cascade against pathogen/danger-associated molecular patterns (PAMPs/DAMPs), such as those arising from environmental toxins or nanoparticles, and is essential for innate immune response. NLRP3 inflammasome activation in cells can lead to the release of IL-1β cytokine via caspase-1, which is required for inflammatory-induced programmed cell death (pyroptosis). Nanoparticles are commonly used as vaccine adjuvants and drug delivery vehicles to improve the efficacy and reduce the toxicity of chemotherapeutic agents...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29038113/will-systems-biology-deliver-its-promise-and-contribute-to-the-development-of-new-or-improved-vaccines-from-data-to-understanding-through-systems-biology
#16
Thomas Hagan, Bali Pulendran
The advent of high-throughput "omics" technologies, combined with the computational and statistical methods necessary to analyze such data, have revolutionized biology, enabling a global view of the complex molecular processes and interactions that occur within a biological system. Such systems-based approaches have begun to be used in the evaluation of immune responses to vaccination, with the promise of identifying predictive biomarkers capable of rapidly evaluating vaccine efficacy, transforming our understanding of the immune mechanisms responsible for protective responses to vaccination and contributing to a new generation of rationally designed vaccines...
October 16, 2017: Cold Spring Harbor Perspectives in Biology
https://www.readbyqxmd.com/read/29034866/the-health-effects-of-aluminum-exposure
#17
Katrin Klotz, Wobbeke Weistenhöfer, Frauke Neff, Andrea Hartwig, Christoph van Thriel, Hans Drexler
BACKGROUND: Aluminum is regularly taken up with the daily diet. It is also used in antiperspirants, as an adjuvant for vaccination, and in desensitization procedures. In this review, we present the scientifically documented harmful effects of aluminum on health and the threshold values associated with them. METHODS: This review is based on publications retrieved by a selective search of the PubMed and SCOPUS databases on the topic of aluminum in connection with neurotoxicity, Alzheimer's disease, and breast cancer, as well as on the authors' personal experience in occupational and environmental medicine...
September 29, 2017: Deutsches Ärzteblatt International
https://www.readbyqxmd.com/read/29033942/mucosal-administration-of-cycle-di-nucleotide-adjuvanted-virosomes-efficiently-induces-protection-against-influenza-h5n1-in-mice
#18
Thomas Ebensen, Jennifer Debarry, Gabriel K Pedersen, Paulina Blazejewska, Sebastian Weissmann, Kai Schulze, Kenneth C McCullough, Rebecca J Cox, Carlos A Guzmán
The need for more effective influenza vaccines is highlighted by the emergence of novel influenza strains, which can lead to new pandemics. There is a growing population of susceptible subjects at risk for severe complications of influenza, such as the elderly who are only in part protected by current licensed seasonal vaccines. One strategy for improving seasonal and pandemic vaccines takes advantage of adjuvants to boost and modulate evoked immune responses. In this study, we examined the capacity of the recently described adjuvant cyclic di-adenosine monophosphate (c-di-AMP) to serve as an adjuvant for improved mucosal influenza vaccines, and induce effective protection against influenza H5N1...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29032558/recombinant-e-coli-dualistic-role-as-an-antigen-adjuvant-delivery-vehicle-for-oral-immunization
#19
Maria Gomes-Solecki, Luciana Richer
Escherichia coli is the mainstay tool for fundamental microbiology research due to its ease of cultivation and safety. Auxotrophic strains of the K-12 and B lineages of E. coli are the organisms of choice to produce recombinant proteins. Components present in the cell envelope of bacteria are also potent immune modulators and have been used to develop adjuvants. We used live E. coli, after induction of recombinant protein expression, to develop a vehicle which has a dualistic function of producing vaccine while presenting itself as the adjuvant to deliver oral vaccines against a number of infectious diseases, including Lyme disease...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29031816/designing-immunostimulatory-double-stranded-messenger-rna-with-maintained-translational-activity-through-hybridization-with-poly-a-sequences-for-effective-vaccination
#20
Satoshi Uchida, Naoto Yoshinaga, Kayoko Yanagihara, Eiji Yuba, Kazunori Kataoka, Keiji Itaka
Messenger (m)RNA vaccines require a safe and potent immunostimulatory adjuvant. In this study, we introduced immunostimulatory properties directly into mRNA molecules by hybridizing them with complementary RNA to create highly immunogenic double stranded (ds)RNAs. These dsRNA formulations, comprised entirely of RNA, are expected to be safe and highly efficient due to antigen expression and immunostimulation occurring simultaneously in the same antigen presenting cells. In this strategy, design of dsRNA is important...
September 27, 2017: Biomaterials
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