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nanoparticle vaccine

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https://www.readbyqxmd.com/read/28548489/glycosaminoglycans-specific-cell-targeting-and-imaging-using-fluorescent-nanodiamonds-coated-with-viral-envelope-proteins
#1
Minh D Pham, Chandra Prakash Epperla, Chia-Lung Hsieh, Wen Chang, Huan-Cheng Chang
Understanding virus-host interactions is crucial for vaccine development. This study investigates such interactions using fluorescent nanodiamonds (FNDs) coated with vaccinia envelope proteins as the model system. To achieve this goal, we noncovalently conjugated 100-nm FND with A27(aa 21-84), a recombinant envelope protein of vaccinia virus, for glycosaminoglycans (GAGs)-specific targeting and imaging of living cells. Another recombinant protein A27(aa 33-84) that removes the GAGs-binding sequences was also used for comparison...
May 26, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28531163/applications-of-gold-nanoparticles-in-nanomedicine-recent-advances-in-vaccines
#2
REVIEW
Sónia Alexandra Correia Carabineiro
Nowadays, gold is used in (nano-)medicine, usually in the form of nanoparticles, due to the solid proofs given of its therapeutic effects on several diseases. Gold also plays an important role in the vaccine field as an adjuvant and a carrier, reducing toxicity, enhancing immunogenic activity, and providing stability in storage. An even brighter golden future is expected for gold applications in this area.
May 22, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28522427/association-of-chitosan-and-aluminium-as-a-new-adjuvant-strategy-for-improved-vaccination
#3
F Lebre, D Bento, J Ribeiro, M Colaço, G Borchard, M C Pedroso de Lima, O Borges
The use of particulate adjuvants offers an interesting possibility to enhance and modulate the immune responses elicited by vaccines. Aluminium salts have been extensively used as vaccine adjuvants, but they lack the capacity to induce a strong cellular and mucosal immune response. Taking this into consideration, in this study we designed a new antigen delivery system combining aluminium salts with chitosan. Chitosan-aluminium nanoparticles (CH-Al NPs) exhibited a mean diameter of 280nm and a positive surface charge...
May 15, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28522213/harnessing-self-assembled-peptide-nanoparticles-in-epitope-vaccine-design
#4
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/28522212/bioengineering-bacterial-outer-membrane-vesicles-as-vaccine-platform
#5
REVIEW
Matthias J H Gerritzen, Dirk E Martens, René H Wijffels, Leo van der Pol, Michiel Stork
Outer membrane vesicles (OMVs) are naturally non-replicating, highly immunogenic spherical nanoparticles derived from Gram-negative bacteria. OMVs from pathogenic bacteria have been successfully used as vaccines against bacterial meningitis and sepsis among others and the composition of the vesicles can easily be engineered. OMVs can be used as a vaccine platform by engineering heterologous antigens to the vesicles. The major advantages of adding heterologous proteins to the OMV are that the antigens retain their native conformation, the ability of targeting specific immune responses, and a single production process suffices for many vaccines...
May 15, 2017: Biotechnology Advances
https://www.readbyqxmd.com/read/28522002/freeze-dried-cylinders-carrying-chitosan-nanoparticles-for-vaginal-peptide-delivery
#6
Marzia Marciello, Silvia Rossi, Carla Caramella, Carmen Remuñán-López
Recently nanoparticle-based vaginal drug delivery formulations have been acquiring great attention for the administration of peptide based-vaccines or microbicides to prevent or treat sexually transmitted diseases. In this work, a straightforward and efficient strategy for the vaginal application and release of peptide-loaded mucoadhesive nanoparticles was developed. This essentially consists of chitosan nanoparticles encapsulated in suitable hydrophilic freeze-dried cylinders. Chitosan nanoparticles are responsible for carrying the peptide drug and allowing adhesion to the vaginal mucosal epithelium...
August 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28516165/host-and-pathogen-derived-adjuvant-coatings-on-protein-nanoparticle-vaccines
#7
Timothy Z Chang, Ishatou Diambou, Jong Rok Kim, Baozhong Wang, Julie A Champion
Nanoparticulate and molecular adjuvants have shown great efficacy in enhancing immune responses, and the immunogenic vaccines of the future will most likely contain both. To investigate the immunostimulatory effects of molecular adjuvants on nanoparticle vaccines, we have designed ovalbumin (OVA) protein nanoparticles coated with two different adjuvants-flagellin (FliC) and immunoglobulin M (IgM). These proteins, derived from Salmonella and mice, respectively, are representatives of pathogen- and host-derived molecules that can enhance immune responses...
March 2017: Bioengineering & Translational Medicine
https://www.readbyqxmd.com/read/28511928/rational-design-of-nanoparticles-towards-targeting-antigen-presenting-cells-and-improved-t-cell-priming
#8
Eva Zupančič, Caterina Curato, Maria Paisana, Catarina Rodrigues, Ziv Porat, Ana S Viana, Carlos A M Afonso, João Pinto, Rogério Gaspar, João N Moreira, Ronit Satchi-Fainaro, Steffen Jung, Helena F Florindo
Vaccination is a promising strategy to trigger and boost immune responses against cancer or infectious disease. We have designed, synthesized and characterized aliphatic-polyester (poly(lactic-co-glycolic acid) (PLGA) nanoparticles (NP) to investigate how the nature of protein association (adsorbed versus entrapped) and polymer/surfactant concentrations impact on the generation and modulation of antigen-specific immune responses. The ability of the NP formulations to target dendritic cells (DC), be internalized and activate the T cells was characterized and optimized in vitro and in vivo using markers of DC activation and co-stimulatory molecules...
May 13, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28511142/tailoring-nanostructured-lipid-carriers-for-the-delivery-of-protein-antigens-physicochemical-properties-versus-immunogenicity-studies
#9
Thomas Courant, Emilie Bayon, Hei Lanne Reynaud-Dougier, Christian Villiers, Mathilde Menneteau, Patrice N Marche, Fabrice P Navarro
New vaccine formulations are still highly anticipated in the near-future to face incoming health challenges, such as emergence or reemergence of severe infectious diseases, immunosenescence associated with elderly or the spread of pathogens resistant to antibiotics. In particular, new nanoparticle-based adjuvants are promising for sub-unit vaccines in order to elicit potent and long lasting immune responses with a better control on their safety. In this context, an innovative delivery system of protein antigens has been designed based on the chemical grafting of the antigen onto the shell of Nanostructured Lipid Carriers (NLC)...
May 3, 2017: Biomaterials
https://www.readbyqxmd.com/read/28502107/a-nano-particle-vector-comprised-of-poly-lactic-co-glycolic-acid-and-monophosphoryl-lipid-a-and-recombinant-mycobacterium-avium-subsp-paratuberculosis-peptides-stimulate-a-pro-immune-profile-in-bovine-macrophages
#10
Cleverson D Souza, John P Bannantine, Wendy C Brown, M Grant Norton, William C Davis, Julianne K Hwang, Parissa Ziaei, Gaber S Abdellrazeq, Meaghan V Eren, James R Deringer, Elizabeth Laws, Maria Clara D Cardieri
AIMS: We evaluated the potential of a nanoparticle (NP) delivery system to improve methods of delivery of candidate peptide based vaccines for Paratuberculosis in cattle. METHODS AND RESULTS: Peptides derived from Mycobacterium avium subsp paratuberculosis (Map), and the proinflammatory monophosphoryl lipid A (MPLA) were incorporated in polymeric NPs based on poly (D, L-lactide-co-glycolide) (PLGA). The PLGA/MPLA NPs carriers were incubated with macrophages to examine their effects on survival and function...
May 14, 2017: Journal of Applied Microbiology
https://www.readbyqxmd.com/read/28496946/alpha-alumina-nanoparticle-conjugation-to-cysteine-peptidase-a-and-b-an-efficient-method-for-autophagy-induction
#11
Fatemeh Beyzay, Ahmad Zavaran Hosseini, Sara Soudi
BACKGROUND: Autophagy as a cellular pathway facilitates several immune responses against infection. It also eliminates invading pathogens through transferring content between the cytosol and the lysosomal vesicles and contributes to the cross-presentation of exogenous antigens to T lymphocytes via MHC class I pathway. Autophagy induction is one of the main targets for new drugs and future vaccine formulations. Nanoparticles are one of the candidates for autophagy induction. Cysteine Peptidase A (CPA) and Cysteine Peptidase B (CPB) are two members of papain family (Clan CA, family C1) enzyme that have been considered as a virulence factor of Leishmania (L...
April 2017: Avicenna Journal of Medical Biotechnology
https://www.readbyqxmd.com/read/28494737/lipid-nanoparticles-as-potential-gene-therapeutic-delivery-systems-for-oral-administration
#12
Golnar Dorraj, Juan José Carreras, Hugo Núñez, Issam Abushammala, Ana Melero
Gene therapy has experimented an increasing attention in the last decades, due to its enormous potential applications in the medical field. It can be defined as the use of genes or genetic material (DNA, RNA, oligonucleotides) to treat or prevent a disease state, generally a genetic-based one. Other applications, like treating viral, bacterial or parasite infections or development of vaccines are gaining also interest. Efficient gene therapy is mainly dependent on the ability of the highly labile genetic material to reach the therapeutic target...
May 10, 2017: Current Gene Therapy
https://www.readbyqxmd.com/read/28484626/classification-of-self-assembling-protein-nanoparticle-architectures-for-applications-in-vaccine-design
#13
G Indelicato, P Burkhard, R Twarock
We introduce here a mathematical procedure for the structural classification of a specific class of self-assembling protein nanoparticles (SAPNs) that are used as a platform for repetitive antigen display systems. These SAPNs have distinctive geometries as a consequence of the fact that their peptide building blocks are formed from two linked coiled coils that are designed to assemble into trimeric and pentameric clusters. This allows a mathematical description of particle architectures in terms of bipartite (3,5)-regular graphs...
April 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28479343/oral-dna-vaccines-based-on-cs-tpp-nanoparticles-and-alginate-microparticles-confer-high-protection-against-infectious-pancreatic-necrosis-virus-ipnv-infection-in-trout
#14
Sohrab Ahmadivand, Mehdi Soltani, Mahdi Behdani, Øystein Evensen, Ehsan Alirahimi, Reza Hassanzadeh, Ellahe Soltani
Infectious pancreatic necrosis virus (IPNV) is the etiological agent of a contagious viral disease causing remarkable mortalities in different fish species. Despite the availability of commercial vaccines against IPN, the disease still constitutes one of the main threats to the aquaculture industry worldwide. In this study, we developed a DNA vaccine encoding the VP2 gene of IPNV and evaluated its ability to induce protective immunity in rainbow trout fry (3 g) at doses of 10 and 25 μg/fish and boosting with the same doses two weeks later through the oral route using chitosan/tripolyphosphate (CS-TPP) nanoparticles and alginate microparticles incorporated into fish feed...
May 4, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28479111/co-utilization-of-a-tlr5-agonist-and-nano-formulation-of-hiv-1-vaccine-candidate-leads-to-increased-vaccine-immunogenicity-and-decreased-immunogenic-dose-a-preliminary-study
#15
Hajar Rostami, Masoumeh Ebtekar, Mehdi Shafiee Ardestani, Mohammad Hossein Yazdi, Mehdi Mahdavi
Vaccines currently available for AIDS show poor efficiency, demonstrating the need for new strategies to increase their immunogenicity. In this study, the HIV-1P24-Nef peptide was used as a model vaccine, followed by utilization of a novel strategy to increase its immunogenicity. There is a growing interest in using TLR agonists for vaccine formulations. Such molecules bind to their receptors on immune cells, especially the cell surface of antigen presenting cells, thereby activating these cells and inflammatory responses...
May 4, 2017: Immunology Letters
https://www.readbyqxmd.com/read/28474379/recent-advances-in-the-use-of-nanoparticles-for-allergen-specific-immunotherapy
#16
REVIEW
Hannah Pohlit, Iris Bellinghausen, Holger Frey, Joachim Saloga
The number of patients suffering from allergic asthma and rhino-conjunctivitis has increased dramatically within the last decades. Allergen-specific immunotherapy (AIT) is the only available cause-oriented therapy so far. AIT reduces symptoms, but has also a disease modifying effect. Disadvantages are a long-lasting procedure, and in a few cases potential systemic adverse reactions. Encapsulation of allergens or DNA vaccines into nanostructures may provide advantages compared to the conventional AIT with non-capsulated allergen extracts: The protein/DNA molecule can be protected from degradation, higher local concentrations and targeted delivery to the site of action appears possible and most importantly, recognition of encapsulated allergen by the immune system, especially by IgE antibodies is prevented...
May 5, 2017: Allergy
https://www.readbyqxmd.com/read/28464951/hepatitis-c-virus-management-potential-impact-of-nanotechnology
#17
REVIEW
Mostafa H Elberry, Noureldien H E Darwish, Shaker A Mousa
Around 170-200 million individuals have hepatitis C virus (HCV), which represents ~ 3% of the world population, including ~ 3-5 million people in the USA. According to the WHO regional office in the Middle East, Egypt has the highest prevalence in the world, with 7% prevalence in adults. There had been no effective vaccine for HCV; a combination of PEG-Interferon and ribavirin for at least 48 weeks was the standard therapy, but it failed in more than 40% of the patients and has a high cost and serious side effects...
May 2, 2017: Virology Journal
https://www.readbyqxmd.com/read/28457665/preclinical-and-clinical-demonstration-of-immunogenicity-by-mrna-vaccines-against-h10n8-and-h7n9-influenza-viruses
#18
Kapil Bahl, Joe J Senn, Olga Yuzhakov, Alex Bulychev, Luis A Brito, Kimberly J Hassett, Michael E Laska, Mike Smith, Örn Almarsson, James Thompson, Amilcar Mick Ribeiro, Mike Watson, Tal Zaks, Giuseppe Ciaramella
Recently, the World Health Organization confirmed 120 new human cases of avian H7N9 influenza in China resulting in 37 deaths, highlighting the concern for a potential pandemic and the need for an effective, safe, and high-speed vaccine production platform. Production speed and scale of mRNA-based vaccines make them ideally suited to impede potential pandemic threats. Here we show that lipid nanoparticle (LNP)-formulated, modified mRNA vaccines, encoding hemagglutinin (HA) proteins of H10N8 (A/Jiangxi-Donghu/346/2013) or H7N9 (A/Anhui/1/2013), generated rapid and robust immune responses in mice, ferrets, and nonhuman primates, as measured by hemagglutination inhibition (HAI) and microneutralization (MN) assays...
April 11, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
https://www.readbyqxmd.com/read/28450700/sensitization-of-glioblastoma-tumor-micro-environment-to-chemo-and-immunotherapy-by-galectin-1-intranasal-knock-down-strategy
#19
Matthias Van Woensel, Thomas Mathivet, Nathalie Wauthoz, Rémi Rosière, Abhishek D Garg, Patrizia Agostinis, Véronique Mathieu, Robert Kiss, Florence Lefranc, Louis Boon, Jochen Belmans, Stefaan W Van Gool, Holger Gerhardt, Karim Amighi, Steven De Vleeschouwer
In this study, we evaluated the consequences of reducing Galectin-1 (Gal-1) in the tumor micro-environment (TME) of glioblastoma multiforme (GBM), via nose-to-brain transport. Gal-1 is overexpressed in GBM and drives chemo- and immunotherapy resistance. To promote nose-to-brain transport, we designed siRNA targeting Gal-1 (siGal-1) loaded chitosan nanoparticles that silence Gal-1 in the TME. Intranasal siGal-1 delivery induces a remarkable switch in the TME composition, with reduced myeloid suppressor cells and regulatory T cells, and increased CD4+ and CD8+ T cells...
April 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28446674/broadening-cd4-and-cd8-t-cell-responses-against-hepatitis-c-virus-by-vaccination-with-ns3-overlapping-peptide-panels-in-cross-priming-liposomes
#20
Jonathan Filskov, Marianne Mikkelsen, Paul R Hansen, Jan P Christensen, Allan R Thomsen, Peter Andersen, Jens Bukh, Else Marie Agger
Despite the introduction of effective drugs to treat patients with chronic hepatitis C virus (HCV) infection, a vaccine would be the only means to substantially reduce the worldwide disease burden. An incomplete understanding of how HCV interacts with its human host and evades immune surveillance has hampered vaccine development. It is generally accepted that in infected individuals, a narrow repertoire of exhausted T cells is a hallmark of persistent infection, whereas broad vigorous CD4(+) and CD8(+) T cell responses are associated with control of acute hepatitis C...
April 26, 2017: Journal of Virology
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