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Nanovaccines

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https://www.readbyqxmd.com/read/28698066/nasal-nanovaccines
#1
REVIEW
B Bernocchi, R Carpentier, D Betbeder
Nasal administration of vaccines is convenient for the potential stimulation of mucosal and systemic immune protection. Moreover the easy accessibility of the intranasal route renders it optimal for pandemic vaccination. Nanoparticles have been identified as ideal delivery systems and adjuvants for vaccine application. Heterogeneous protocols have been used for animal studies. This complicates the understanding of the formulation influence on the immune response and the comparison of the different nanoparticles approaches developed...
July 8, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28659922/a-poly-lactic-co-glycolic-acid-nanovaccine-based-on-chimeric-peptides-from-different-leishmania-infantum-proteins-induces-dendritic-cells-maturation-and-promotes-peptide-specific-ifn%C3%AE-producing-cd8-t-cells-essential-for-the-protection-against-experimental-visceral
#2
Evita Athanasiou, Maria Agallou, Spyros Tastsoglou, Olga Kammona, Artemis Hatzigeorgiou, Costas Kiparissides, Evdokia Karagouni
Visceral leishmaniasis, caused by Leishmania (L.) donovani and L. infantum protozoan parasites, can provoke overwhelming and protracted epidemics, with high case-fatality rates. An effective vaccine against the disease must rely on the generation of a strong and long-lasting T cell immunity, mediated by CD4(+) TH1 and CD8(+) T cells. Multi-epitope peptide-based vaccine development is manifesting as the new era of vaccination strategies against Leishmania infection. In this study, we designed chimeric peptides containing HLA-restricted epitopes from three immunogenic L...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28557331/understanding-the-effect-of-surface-chemistry-of-mesoporous-silica-nanorods-on-their-vaccine-adjuvant-potency
#3
Yannan Yang, Manasi Jambhrunkar, Prasanna Lakshmi Abbaraju, Meihua Yu, Min Zhang, Chengzhong Yu
Mesoporous silica nanoparticles are reported as adjuvants in nanovaccines in generating robust antigen-specific immunity. However, the effect of surface chemistry in initiating and modulating the immune response remains largely unexplored. In this study, mesoporous silica nanorods (MSNRs) are modified with NH2 and C18 groups to investigate the influence of surface functional groups (OH, NH2 , and C18 ) on their adjuvant efficacy. It is found that compared to OH and NH2 groups, the hydrophobic C18 modification significantly enhances antigen uptake by antigen presenting cells and endosomal-lysosomal escape in vitro, dendritic cells, and macrophages maturation ex vivo, and elicits secretion of interferon-γ level and antibody response in immunized mice...
May 29, 2017: Advanced Healthcare Materials
https://www.readbyqxmd.com/read/28551462/rationalization-of-a-nanoparticle-based-nicotine-nanovaccine-as-an-effective-next-generation-nicotine-vaccine-a-focus-on-hapten-localization
#4
Zongmin Zhao, Yun Hu, Theresa Harmon, Paul Pentel, Marion Ehrich, Chenming Zhang
A lipid-polymeric hybrid nanoparticle-based next-generation nicotine nanovaccine was rationalized in this study to combat nicotine addiction. A series of nanovaccines, which had nicotine-haptens localized on carrier protein (LPKN), nanoparticle surface (LPNK), or both (LPNKN), were designed to study the impact of hapten localization on their immunological efficacy. All three nanovaccines were efficiently taken up and processed by dendritic cells. LPNKN induced a significantly higher immunogenicity against nicotine and a significantly lower anti-carrier protein antibody level compared to LPKN and LPNK...
May 19, 2017: Biomaterials
https://www.readbyqxmd.com/read/28522213/harnessing-self-assembled-peptide-nanoparticles-in-epitope-vaccine-design
#5
REVIEW
Manica Negahdaripour, Nasim Golkar, Nasim Hajighahramani, Sedigheh Kianpour, Navid Nezafat, Younes Ghasemi
Vaccination has been one of the most successful breakthroughs in medical history. In recent years, epitope-based subunit vaccines have been introduced as a safer alternative to traditional vaccines. However, they suffer from limited immunogenicity. Nanotechnology has shown value in solving this issue. Different kinds of nanovaccines have been employed, among which virus-like nanoparticles (VLPs) and self-assembled peptide nanoparticles (SAPNs) seem very promising. Recently, SAPNs have attracted special interest due to their unique properties, including molecular specificity, biodegradability, and biocompatibility...
May 15, 2017: Biotechnology Advances
https://www.readbyqxmd.com/read/28436963/a-sting-activating-nanovaccine-for-cancer-immunotherapy
#6
Min Luo, Hua Wang, Zhaohui Wang, Haocheng Cai, Zhigang Lu, Yang Li, Mingjian Du, Gang Huang, Chensu Wang, Xiang Chen, Matthew R Porembka, Jayanthi Lea, Arthur E Frankel, Yang-Xin Fu, Zhijian J Chen, Jinming Gao
The generation of tumour-specific T cells is critically important for cancer immunotherapy. A major challenge in achieving a robust T-cell response is the spatiotemporal orchestration of antigen cross-presentation in antigen-presenting cells with innate stimulation. Here, we report a minimalist nanovaccine, comprising a simple physical mixture of an antigen and a synthetic polymeric nanoparticle, PC7A NP, which generates a strong cytotoxic T-cell response with low systemic cytokine expression. Mechanistically, the PC7A NP achieves efficient cytosolic delivery of tumour antigens to antigen-presenting cells in draining lymph nodes, leading to increased surface presentation while simultaneously activating type I interferon-stimulated genes...
July 2017: Nature Nanotechnology
https://www.readbyqxmd.com/read/28417012/coordinating-antigen-cytosolic-delivery-and-danger-signaling-to-program-potent-cross-priming-by-micelle-based-nanovaccine
#7
Zhida Liu, Chang Zhou, Yan Qin, Zihao Wang, Luyao Wang, Xiuli Wei, Yinjian Zhou, Qicheng Li, Hang Zhou, Wenjun Wang, Yang-Xin Fu, Mingzhao Zhu, Wei Liang
Although re-activating cytotoxic T-cell (CTLs) response inside tumor tissues by checkpoint blockade has demonstrated great success in tumor immunotherapy, active induction of efficient endogenous CTL response by therapeutic vaccines has been largely hampered by inefficient cytosolic delivery of antigens and coordinated activation of dendritic cells (DCs) in lymph nodes. Here we show that polyethylene glycol-phosphatidylethanolamine (PEG-PE) micelles transform soluble peptides into α-helix to enable their efficient cytosolic delivery...
2017: Cell Discovery
https://www.readbyqxmd.com/read/28414151/targeted-antigen-delivery-to-dendritic-cell-via-functionalized-alginate-nanoparticles-for-cancer-immunotherapy
#8
Chuangnian Zhang, Gaona Shi, Ju Zhang, Huijuan Song, Jinfeng Niu, Shengbin Shi, Pingsheng Huang, Yanming Wang, Weiwei Wang, Chen Li, Deling Kong
The purpose of the present study was to identify an "easy-to-adopt" strategy to enhance immune responses using functionalized alginate (ALG) nanoparticles (MAN-ALG/ALG=OVA NPs), which were prepared by CaCl2 cross-linking of two different types of ALG. The mannose (MAN) modified ALG (MAN-ALG) was used for dendritic cell targeting. The other component, composed of ovalbumin (OVA), a model antigen, is conjugated to ALG (ALG=OVA) via pH sensitive Schiff base bond. Grafting of alginate was demonstrated by FT-IR and (1)H NMR, while the morphological structure, particle size, Zeta potential of MAN-ALG/ALG=OVA NPs were measured using TEM and DLS...
June 28, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28336379/synthetic-nanovaccines-for-immunotherapy
#9
Min Luo, Layla Z Samandi, Zhaohui Wang, Zhijian J Chen, Jinming Gao
Although vaccination is historically one of the most successful strategies for the prevention of infectious diseases, development of vaccines for cancer and many chronic infections, such as HIV, malaria, and tuberculosis, has remained a challenge. Strong and long-lasting antigen-specific T cell responses are critical for therapy of these diseases. A major challenge in achieving a robust CD8+ T cell response is the requirement of spatio-temporal orchestration of antigen cross-presentation in antigen-presenting cells with innate stimulation...
March 21, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28323111/nanoparticles-for-tumor-immunotherapy
#10
REVIEW
Xinlong Zang, Xiuli Zhao, Haiyang Hu, Mingxi Qiao, Yihui Deng, Dawei Chen
Although most researches and therapies have been focused on the tumor itself, it is becoming clear that immune cells can not only suppress tumor development but support and maintain their malignant type. Promising recent developments in immunology will provide opportunities for tumor-specific immunotherapy, which can orchestrate the patients immune system to target, fight and eradicate cancer cells without destroying healthy cells. However, antitumor immunity driven by self-immune system alone may be therapeutically insufficient...
March 18, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/28289416/specific-and-efficient-uptake-of-surfactant-free-poly-lactic-acid-nanovaccine-vehicles-by-mucosal-dendritic-cells-in-adult-zebrafish-after-bath-immersion
#11
Julien Rességuier, Emilie Delaune, Anne-Line Coolen, Jean-Pierre Levraud, Pierre Boudinot, Dominique Le Guellec, Bernard Verrier
Activation of mucosal immunity is a key milestone for next-generation vaccine development. Biocompatible polymer-based nanoparticles (NPs) are promising vectors and adjuvants for mucosal vaccination. However, their in vivo uptake by mucosae and their biodistribution in antigen-presenting cells (APCs) need to be better understood to optimize mucosal nanovaccine designs. Here, we assessed if APCs are efficiently targeted in a spontaneous manner by surfactant-free poly(lactic acid) nanoparticles (PLA-NPs) after mucosal administration...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/28277646/efficient-nanovaccine-delivery-in-cancer-immunotherapy
#12
Guizhi Zhu, Fuwu Zhang, Qianqian Ni, Gang Niu, Xiaoyuan Chen
Vaccines hold tremendous potential for cancer immunotherapy by treating the immune system. Subunit vaccines, including molecular adjuvants and cancer-associated antigens or cancer-specific neoantigens, can elicit potent antitumor immunity. However, subunit vaccines have shown limited clinical benefit in cancer patients, which is in part attributed to inefficient vaccine delivery. In this Perspective, we discuss vaccine delivery by synthetic nanoparticles or naturally derived nanoparticles for cancer immunotherapy...
March 28, 2017: ACS Nano
https://www.readbyqxmd.com/read/28244816/vaccine-nanoparticles-for-protection-against-hiv-infection
#13
Marisa E Aikins, Joseph Bazzill, James J Moon
The development of a successful vaccine against HIV is a major global challenge. Antiretroviral therapy is the standard treatment against HIV-1 infection. However, only 46% of the eligible people received the therapy in 2015. Furthermore, suboptimal adherence poses additional obstacles. Therefore, there is an urgent need for an HIV-1 vaccine. The most promising clinical trial to date is Phase III RV144, which for the first time demonstrated the feasibility of vaccine-mediated immune protection against HIV-1...
March 2017: Nanomedicine
https://www.readbyqxmd.com/read/28228073/principal-physicochemical-methods-used-to-characterize-dendrimer-molecule-complexes-used-as-genetic-therapy-agents-nanovaccines-or-drug-carriers
#14
Rodríguez Fonseca Rolando Alberto, Rodrigues Joao, Muñoz-Fernández María de Los Angeles, Martínez Muñoz Alberto, Fragoso Vázquez Manuel Jonathan, Correa Basurto José
Nanomedicine is the application of nanotechnology to medicine. This field is related to the study of nanodevices and nanomaterials applied to various medical uses, such as in improving the pharmacological properties of different molecules. Dendrimers are synthetic nanoparticles whose physicochemical properties vary according to their chemical structure. These molecules have been extensively investigated as drug nanocarriers to improve drug solubility and as sustained-release systems. New therapies such as gene therapy and the development of nanovaccines can be improved by the use of dendrimers...
February 20, 2017: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/28167389/engineering-of-a-hybrid-nanoparticle-based-nicotine-nanovaccine-as-a-next-generation-immunotherapeutic-strategy-against-nicotine-addiction-a-focus-on-hapten-density
#15
Zongmin Zhao, Kristen Powers, Yun Hu, Michael Raleigh, Paul Pentel, Chenming Zhang
Although vaccination is a promising way to combat nicotine addiction, most traditional hapten-protein conjugate nicotine vaccines only show limited efficacy due to their poor recognition and uptake by immune cells. This study aimed to develop a hybrid nanoparticle-based nicotine vaccine with improved efficacy. The focus was to study the impact of hapten density on the immunological efficacy of the proposed hybrid nanovaccine. It was shown that the nanovaccine nanoparticles were taken up by the dendritic cells more efficiently than the conjugate vaccine, regardless of the hapten density on the nanoparticles...
April 2017: Biomaterials
https://www.readbyqxmd.com/read/28117173/polyanhydride-nanovaccine-against-swine-influenza-virus-in-pigs
#16
Santosh Dhakal, Jonathan Goodman, Kathryn Bondra, Yashavanth S Lakshmanappa, Jagadish Hiremath, Duan-Liang Shyu, Kang Ouyang, Kyung-Il Kang, Steven Krakowka, Michael J Wannemuehler, Chang Won Lee, Balaji Narasimhan, Gourapura J Renukaradhya
We have recently demonstrated the effectiveness of an influenza A virus (IAV) subunit vaccine based on biodegradable polyanhydride nanoparticles delivery in mice. In the present study, we evaluated the efficacy of ∼200nm polyanhydride nanoparticles encapsulating inactivated swine influenza A virus (SwIAV) as a vaccine to induce protective immunity against a heterologous IAV challenge in pigs. Nursery pigs were vaccinated intranasally twice with inactivated SwIAV H1N2 (KAg) or polyanhydride nanoparticle-encapsulated KAg (KAg nanovaccine), and efficacy was evaluated against a heterologous zoonotic virulent SwIAV H1N1 challenge...
February 22, 2017: Vaccine
https://www.readbyqxmd.com/read/28114333/identification-of-balb-c-immune-markers-correlated-with-a-partial-protection-to-leishmania-infantum-after-vaccination-with-a-rationally-designed-multi-epitope-cysteine-protease-a-peptide-based-nanovaccine
#17
Maria Agallou, Maritsa Margaroni, Evita Athanasiou, Dimitra K Toubanaki, Katerina Kontonikola, Konstantina Karidi, Olga Kammona, Costas Kiparissides, Evdokia Karagouni
BACKGROUND: Through their increased potential to be engaged and processed by dendritic cells (DCs), nanovaccines consisting of Poly(D,L-lactic-co-glycolic acid) (PLGA) nanoparticles (NPs) loaded with both antigenic moieties and adjuvants are attractive candidates for triggering specific defense mechanisms against intracellular pathogens. The aim of the present study was to evaluate the immunogenicity and prophylactic potential of a rationally designed multi-epitope peptide of Leishmania Cysteine Protease A (CPA160-189) co-encapsulated with Monophosphoryl lipid A (MPLA) in PLGA NPs against L...
January 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28009461/multistaged-nanovaccines-based-on-porous-silicon-acetalated-dextran-cancer-cell-membrane-for-cancer-immunotherapy
#18
Flavia Fontana, Mohammad-Ali Shahbazi, Dongfei Liu, Hongbo Zhang, Ermei Mäkilä, Jarno Salonen, Jouni T Hirvonen, Hélder A Santos
Immunoadjuvant porous silicon (PSi)-based nanovaccines are prepared by nanoprecipitation in a glass capillary microfluidics device. Vesicles, derived from cancer cell membranes encapsulating thermally oxidized PSi nanoparticles or PSi-polymer nanosystems binding a model antigen, are biocompatible over a wide range of concentrations, and show immunostimulant properties in human cells, promoting the expression of co-stimulatory signals and the secretion of pro-inflammatory cytokines.
December 23, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27895483/improved-proliferation-of-antigen-specific-cytolytic-t-lymphocytes-using-a-multimodal-nanovaccine
#19
Bo Li, Michael Siuta, Vanessa Bright, Dmitry Koktysh, Brittany K Matlock, Megan E Dumas, Meiying Zhu, Alex Holt, Donald Stec, Shenglou Deng, Paul B Savage, Sebastian Joyce, Wellington Pham
The present study investigated the immunoenhancing property of our newly designed nanovaccine, that is, its ability to induce antigen-specific immunity. This study also evaluated the synergistic effect of a novel compound PBS-44, an α-galactosylceramide analog, in boosting the immune response induced by our nanovaccine. The nanovaccine was prepared by encapsulating ovalbumin (ova) and an adjuvant within the poly(lactic-co-glycolic acid) nanoparticles. Quantitative analysis of our study data showed that the encapsulated vaccine was physically and biologically stable; the core content of our nanovaccine was found to be released steadily and slowly, and nearly 90% of the core content was slowly released over the course of 25 days...
2016: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/27890399/a-partially-purified-outer-membrane-protein-virb9-1-for-low-cost-nanovaccines-against-anaplasma-marginale
#20
Liang Zhao, Antonino S Cavallaro, David Wibowo, Bing Zhang, Jun Zhang, Neena Mitter, Chengzhong Yu, Chun-Xia Zhao, Anton P J Middelberg
Anaplasma marginale is a devastating tick-borne pathogen causing anaplasmosis in cattle and results in significant economic loss to the cattle industry worldwide. Currently, there is no widely accepted vaccine against A. marginale. New generation subunit vaccines against A. marginale, which are much safer, more efficient and cost-effective, are in great need. The A. marginale outer membrane protein VirB9-1 is a promising antigen for vaccination. We previously have shown that soluble recombinant VirB9-1 protein can be expressed and purified from Escherichia coli and induce a high level of humoral and cellular immunity in mice...
January 3, 2017: Vaccine
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