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nanoparticle vaccine

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https://www.readbyqxmd.com/read/28794134/mrna-mediates-passive-vaccination-against-infectious-agents-toxins-and-tumors
#1
Moritz Thran, Jean Mukherjee, Marion Pönisch, Katja Fiedler, Andreas Thess, Barbara L Mui, Michael J Hope, Ying K Tam, Nigel Horscroft, Regina Heidenreich, Mariola Fotin-Mleczek, Charles B Shoemaker, Thomas Schlake
The delivery of genetic information has emerged as a valid therapeutic approach. Various reports have demonstrated that mRNA, besides its remarkable potential as vaccine, can also promote expression without inducing an adverse immune response against the encoded protein. In the current study, we set out to explore whether our technology based on chemically unmodified mRNA is suitable for passive immunization. To this end, various antibodies using different designs were expressed and characterized in vitro and in vivo in the fields of viral infections, toxin exposure, and cancer immunotherapies...
August 9, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/28790999/immunization-with-recombinant-tcdb-encapsulated-nanocomplex-induces-protection-against-clostridium-difficile-challenge-in-a-mouse-model
#2
Yi-Wen Liu, Yu-Hung Chen, Jenn-Wei Chen, Pei-Jane Tsai, I-Hsiu Huang
Clostridium difficile is considered to be one of the major cause of infectious diarrhea in healthcare systems worldwide. Symptoms of C. difficile infection are caused largely by the production of two cytotoxins: toxin A (TcdA) and toxin B (TcdB). Vaccine development is considered desirable as it would decrease the mounting medical costs and mortality associated with C. difficile infections. Biodegradable nanoparticles composed of poly-γ-glutamic acid (γ-PGA) and chitosan have proven to be a safe and effective antigen delivery system for many viral vaccines...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28781959/structure-based-design-of-ferritin-nanoparticle-immunogens-displaying-antigenic-loops-of-neisseria-gonorrhoeae
#3
Liqin Wang, Daniel Xing, Adriana Le Van, Ann E Jerse, Shuishu Wang
Effective vaccines are urgently needed to combat gonorrhea, a common sexually transmitted bacterial infection, for which treatment options are diminishing due to rapid emergence of antibiotic resistance. We have used a rational approach to the development of gonorrhea vaccines, and genetically engineered nanoparticles to present antigenic peptides of Neisseria gonorrhoeae, the causative agent of gonorrhea. We hypothesized that the ferritin nanocage could be used as a platform to display an ordered array of N...
August 2017: FEBS Open Bio
https://www.readbyqxmd.com/read/28776443/exploring-the-immunopotentiation-of-chinese-yam-polysaccharide-poly-lactic-co-glycolic-acid-nanoparticles-in-an-ovalbumin-vaccine-formulation-in-vivo
#4
Li Luo, Tao Qin, Yifan Huang, Sisi Zheng, Ruonan Bo, Zhenguang Liu, Jie Xing, Yuanliang Hu, Jiaguo Liu, Deyun Wang
Biocompatible and biodegradable poly(lactic-co-glycolic acid) (PLGA) has been approved by the US Food and Drug Administration and has frequently been used to develop potential vaccine delivery systems. The immunoregulation and immunopotentiation of Chinese yam polysaccharide (CYP) have been widely demonstrated. In the current study, cell uptake mechanisms in dendritic cells (DCs) were monitored in vitro using confocal laser scanning microscopy, transmission electron microscopy, and flow cytometry. To study a CYP-PLGA nanoparticle-adjuvanted delivery system, CYP and ovalbumin (OVA) were encapsulated in PLGA nanoparticles (CYPPs) to act as a vaccine, and the formulation was tested in immunized mice...
November 2017: Drug Delivery
https://www.readbyqxmd.com/read/28769561/nanoparticle-orientationally-displayed-antigen-epitopes-improve-neutralizing-antibody-level-in-a-model-of-porcine-circovirus-type-2
#5
Peiyang Ding, Teng Zhang, Yafei Li, Man Teng, Yaning Sun, Xiao Liu, Shujun Chai, Enmin Zhou, Qianyue Jin, Gaiping Zhang
Recent advancements in biotechnology have enabled the rapid identification and subsequent expression of pathogenic microbial major antigens that induce protective immune responses. However, subunit vaccines have not been successfully commercialized mainly due to the lack of sufficient levels of neutralizing antibodies (NAs). High levels of NA rely on the efficient recognition and cross-linking of multiple neutralizing epitopes with B-cell receptors (BCRs). Nanoparticles are able to display coupled antigenic arrays at high density and provide multiple binding molecular scenarios with BCRs...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28761815/a-pilot-study-on-using-rapamycin-carrying-synthetic-vaccine-particles-svp-in-conjunction-with-enzyme-replacement-therapy-to-induce-immune-tolerance-in-pompe-disease
#6
Han-Hyuk Lim, Haiqing Yi, Takashi K Kishimoto, Fengqin Gao, Baodong Sun, Priya S Kishnani
A major obstacle to enzyme replacement therapy (ERT) with recombinant human acid-α-glucosidase (rhGAA) for Pompe disease is the development of high titers of anti-rhGAA antibodies in a subset of patients, which often leads to a loss of treatment efficacy. In an effort to induce sustained immune tolerance to rhGAA, we supplemented the rhGAA therapy with a weekly intravenous injection of synthetic vaccine particles carrying rapamycin (SVP-Rapa) during the first 3 weeks of a 12-week course of ERT in GAA-KO mice, and compared this with three intraperitoneal injections of methotrexate (MTX) per week for the first 3 weeks...
December 2017: Molecular Genetics and Metabolism Reports
https://www.readbyqxmd.com/read/28759297/self-assembling-anticaries-mucosal-vaccine-containing-ferritin-cage-nanostructure-and-glucan-binding-region-of-s-mutans-glucosyltransferase-effectively-prevents-caries-formation-in-rodents
#7
Xi-Xi Cao, Yu-Hong Li, Qian-Lin Ye, Tian-Feng Wang, Ming-Wen Fan
Anticaries protein vaccines that induce a mucosal immune response are not effective. Therefore, development of effective and convenient anticaries vaccines is a priority of dental research. Here we generated self-assembling nanoparticles by linking the glucan-binding region of Streptococcus mutans glucosyltransferase (GLU) to the N-terminal domain of ferritin to determine whether these novel nanoparticles enhanced the immunogenicity of an anticaries protein vaccine against GLU in rodents. We constructed the expression plasmid pET28a-GLU-FTH and purified the proteins from bacteria using size-exclusion chromatography...
July 31, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28758135/effect-of-chitosan-and-liposome-nanoparticles-as-adjuvant-codelivery-on-the-immunoglobulin-g-subclass-distribution-in-a-mouse-model
#8
Agus Haryono, Korrie Salsabila, Witta Kartika Restu, Sri Budi Harmami, Dodi Safari
BACKGROUND: We investigate the immunogenic properties of chitosan and liposome nanoparticles as adjuvant codelivery against a commercial pneumococcal conjugate vaccine (PCV) in an animal model. METHODS: The chitosan and liposome nanoparticles were prepared by ionic gelation and dry methods, respectively. The PCV immunization was performed intradermally in the presence of adjuvants and booster injections which were given without an adjuvant. The Quil-A® was used as a control adjuvant...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28753580/gnp-gapdh1-22-nanovaccines-prevent-neonatal-listeriosis-by-blocking-microglial-apoptosis-and-bacterial-dissemination
#9
Ricardo Calderon-Gonzalez, Elisabet Frande-Cabanes, Hector Teran-Navarro, José María Marimon, Javier Freire, David Salcines-Cuevas, M Carmen Fariñas, Claudia Gonzalez-Rico, Marco Marradi, Isabel Garcia, Mirian Alkorta-Gurrutxaga, Aida San Nicolas-Gomez, Ana Castañeda-San Pedro, Sonsoles Yañez-Diaz, Soledad Penades, Carmen Punzon, Javier Gomez-Roman, Fernando Rivera, Manuel Fresno, Carmen Alvarez-Dominguez
Clinical cases of neonatal listeriosis are associated with brain disease and fetal loss due to complications in early or late pregnancy, which suggests that microglial function is altered. This is believed to be the first study to link microglial apoptosis with neonatal listeriosis and listeriosis-associated brain disease, and to propose a new nanovaccine formulation that reverses all effects of listeriosis and confers Listeria monocytogenes (LM)-specific immunity. We examined clinical cases of neonatal listeriosis in 2013-2015 and defined two useful prognostic immune biomarkers to design listeriosis vaccines: high anti-GAPDH1-22 titres and tumor necrosis factor (TNF)/interleukin (IL)-6 ratios...
July 20, 2017: Oncotarget
https://www.readbyqxmd.com/read/28746382/gelatin-nanoparticles-enhance-delivery-of-hepatitis-c-virus-recombinant-ns2-gene
#10
Salwa Sabet, Marina A George, Haidan M El-Shorbagy, Heba Bassiony, Khaled Y Farroh, Tareq Youssef, Taher A Salaheldin
BACKGROUND: Development of an effective non-viral vaccine against hepatitis C virus infection is of a great importance. Gelatin nanoparticles (Gel.NPs) have an attention and promising approach as a viable carrier for delivery of vaccine, gene, drug and other biomolecules in the body. AIM OF WORK: The present study aimed to develop stable Gel.NPs conjugated with nonstructural protein 2 (NS2) gene of Hepatitis C Virus genotype 4a (HCV4a) as a safe and an efficient vaccine delivery system...
2017: PloS One
https://www.readbyqxmd.com/read/28740382/dual-linker-gold-nanoparticles-as-adjuvanting-carriers-for-multivalent-display-of-recombinant-influenza-hemagglutinin-trimers-and-flagellin-improve-the-immunological-responses-in-vivo-and-in-vitro
#11
Chao Wang, Wandi Zhu, Bao-Zhong Wang
Vaccination is the most cost-effective means of infectious disease control. Although current influenza vaccines are effective in battling closely matched strains, such vaccines have major limitations such as the requirement to produce new vaccines every season, an egg-dependent production system, long production periods, uncertainty in matching the vaccine to circulating strains, and the inability to react to new influenza pandemics resulting from genetic drift or shift. To overcome the intrinsic limitations of the conventional influenza vaccine, we have designed dual-linker gold nanoparticles (AuNPs) conjugated with both recombinant trimetric A/Aichi/2/68 (H3N2), hemagglutinin (HA) and TLR5 agonist flagellin (FliC) as a novel vaccine approach...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28723962/surface-functionalization-specific-binding-of-coagulation-factors-by-zinc-oxide-nanoparticles-delays-coagulation-time-and-reduces-thrombin-generation-potential-in-vitro
#12
Jun-Young Yang, Jiyeong Bae, Ayoung Jung, Seonyeong Park, Seungtae Chung, Jihyun Seok, Hangsik Roh, Youngju Han, Jae-Min Oh, Soojung Sohn, Jayoung Jeong, Wan-Seob Cho
Zinc oxide nanoparticles (ZnO NPs) have many biomedical applications such as chemotherapy agents, vaccine adjuvants, and biosensors but its hemocompatibility is still poorly understood, especially in the event of direct contact of NPs with blood components. Here, we investigated the impact of size and surface functional groups on the platelet homeostasis. ZnO NPs were synthesized in two different sizes (20 and 100 nm) and with three different functional surface groups (pristine, citrate, and L-serine). ZnO NPs were incubated with plasma collected from healthy rats to evaluate the coagulation time, kinetics of thrombin generation, and profile of levels of coagulation factors in the supernatant and coronated onto the ZnO NPs...
2017: PloS One
https://www.readbyqxmd.com/read/28720097/a-versatile-papaya-mosaic-virus-papmv-vaccine-platform-based-on-sortase-mediated-antigen-coupling
#13
Ariane Thérien, Mikaël Bédard, Damien Carignan, Gervais Rioux, Louis Gauthier-Landry, Marie-Ève Laliberté-Gagné, Marilène Bolduc, Pierre Savard, Denis Leclerc
BACKGROUND: Flexuous rod-shaped nanoparticles made of the coat protein (CP) of papaya mosaic virus (PapMV) have been shown to trigger innate immunity through engagement of toll-like receptor 7 (TLR7). PapMV nanoparticles can also serve as a vaccine platform as they can increase the immune response to fused peptide antigens. Although this approach shows great potential, fusion of antigens directly to the CP open reading frame (ORF) is challenging because the fused peptides can alter the structure of the CP and its capacity to self assemble into nanoparticles-a property essential for triggering an efficient immune response to the peptide...
July 18, 2017: Journal of Nanobiotechnology
https://www.readbyqxmd.com/read/28716554/calcium-phosphate-nanoparticle-capnp-for-dose-sparing-of-inactivated-whole-virus-pandemic-influenza-a-h1n1-2009-vaccine-in-mice
#14
Tülin Morçӧl, Brett L Hurst, E Bart Tarbet
The emergence of pandemic influenza strains, particularly the reemergence of the swine-derived influenza A (H1N1) in 2009, is reaffirmation that influenza viruses are very adaptable and influenza remains as a significant global public health treat. As recommended by the World Health Organization (WHO), the use of adjuvants is an attractive approach to improve vaccine efficacy and allow dose-sparing during an influenza emergency. In this study, we utilized CaPtivate Pharmaceutical's proprietary calcium phosphate nanoparticles (CaPNP) vaccine adjuvant and delivery platform to formulate an inactivated whole virus influenza A/CA/04/2009 (H1N1pdm) vaccine as a potential dose-sparing strategy...
July 14, 2017: Vaccine
https://www.readbyqxmd.com/read/28715455/synthetic-melanin-bound-to-subunit-vaccine-antigens-significantly-enhances-cd8-t-cell-responses
#15
Antoine F Carpentier, Frédéric Geinguenaud, Thi Tran, Floraly Sejalon, Antoine Martin, Laurence Motte, Eric Tartour, Claire Banissi
Cytotoxic T-lymphocytes (CTLs) play a key role in immunity against cancer; however, the induction of CTL responses with currently available vaccines remains difficult. Because several reports have suggested that pigmentation and immunity might be functionally linked, we investigated whether melanin can act as an adjuvant in vaccines. Short synthetic peptides (8-35 amino acids long) containing T-cell epitopes were mixed with a solution of L-Dopa, a precursor of melanin. The mixture was then oxidized to generate nanoparticles of melanin-bound peptides...
2017: PloS One
https://www.readbyqxmd.com/read/28714508/gold-glyconanoparticles-coupled-to-listeriolysin-o-91-99-peptide-serve-as-adjuvant-therapy-against-melanoma
#16
R Calderon-Gonzalez, H Terán-Navarro, I García, M Marradi, D Salcines-Cuevas, S Yañez-Diaz, A Solis-Angulo, E Frande-Cabanes, M C Fariñas, A Garcia-Castaño, J Gomez-Roman, S Penades, F Rivera, J Freire, C Álvarez-Domínguez
Dendritic cell-based (DC-based) vaccines are promising immunotherapies for cancer. However, several factors, such as the lack of efficient targeted delivery and the sources and types of DCs, have limited the efficacy of DCs and their clinical potential. We propose an alternative nanotechnology-based vaccine platform with antibacterial prophylactic abilities that uses gold glyconanoparticles coupled to listeriolysin O 91-99 peptide (GNP-LLO91-99), which acts as a novel adjuvant for cancer therapy. GNP-LLO91-99, when used to vaccinate mice, exhibited dual antitumour activities, namely, the inhibition of tumour migration and growth and adjuvant activity for recruiting and activating DCs, including those from melanoma patients...
August 3, 2017: Nanoscale
https://www.readbyqxmd.com/read/28712326/calcium-phosphate-nanoparticles-as-a-new-generation-vaccine-adjuvant
#17
Yahua Lin, Xin Wang, Xiaofen Huang, Jun Zhang, Ningshao Xia, Qinjian Zhao
Adjuvants are essential components in vaccine formulations to induce robust immunity against pathogens. The most widely used adjuvants in human vaccines are aluminum salts, that can effectively elicit a T helper type-2 (Th2)-biased humoral immune response for producing a high antibody titer but with a limited cellular immune response. Biocompatible calcium phosphate nanoparticles (CaP-NPs) with tunable characteristics have potentials to function as adjuvants for inducing more balanced T helper type-1 (Th1) and Th2 immune responses...
September 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/28708997/vaccine-mediated-protection-against-zika-virus-induced-congenital-disease
#18
Justin M Richner, Brett W Jagger, Chao Shan, Camila R Fontes, Kimberly A Dowd, Bin Cao, Sunny Himansu, Elizabeth A Caine, Bruno T D Nunes, Daniele B A Medeiros, Antonio E Muruato, Bryant M Foreman, Huanle Luo, Tian Wang, Alan D Barrett, Scott C Weaver, Pedro F C Vasconcelos, Shannan L Rossi, Giuseppe Ciaramella, Indira U Mysorekar, Theodore C Pierson, Pei-Yong Shi, Michael S Diamond
The emergence of Zika virus (ZIKV) and its association with congenital malformations has prompted the rapid development of vaccines. Although efficacy with multiple viral vaccine platforms has been established in animals, no study has addressed protection during pregnancy. We tested in mice two vaccine platforms, a lipid nanoparticle-encapsulated modified mRNA vaccine encoding ZIKV prM and E genes and a live-attenuated ZIKV strain encoding an NS1 protein without glycosylation, for their ability to protect against transmission to the fetus...
July 13, 2017: Cell
https://www.readbyqxmd.com/read/28702043/adoption-of-the-2a-ribosomal-skip-principle-to-tobacco-mosaic-virus-for-peptide-display
#19
Juliane Röder, Rainer Fischer, Ulrich Commandeur
Plant viruses are suitable as building blocks for nanomaterials and nanoparticles because they are easy to modify and can be expressed and purified using plants or heterologous expression systems. Plant virus nanoparticles have been utilized for epitope presentation in vaccines, for drug delivery, as nanospheres and nanowires, and for biomedical imaging applications. Fluorescent protein fusions have been instrumental for the tagging of plant virus particles. The monomeric non-oxygen-dependent fluorescent protein iLOV can be used as an alternative to green fluorescent protein...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28701478/conjugation-does-not-conquer-all-in-cancer-nanotherapy
#20
Christopher Hine
Vaccination with potato virus X nanoparticles enhances the efficacy of traditional doxorubicin anticancer therapy against a mouse melanoma tumor model.
July 12, 2017: Science Translational Medicine
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