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https://www.readbyqxmd.com/read/28819449/self-assembly-dna-polyplex-vaccine-inside-dissolving-microneedles-for-high-potency-intradermal-vaccination
#1
Jing-Fong Liao, Jin-Ching Lee, Chun-Kuang Lin, Kuo-Chen Wei, Pin-Yuan Chen, Hung-Wei Yang
The strong immunogenicity induction is the powerful weapon to prevent the virus infections. This study demonstrated that one-step synthesis of DNA polyplex vaccine in microneedle (MN) patches can induce high immunogenicity through intradermal vaccination and increase the vaccine stability for storage outside the cold chain. More negative charged DNA vaccine was entrapped into the needle region of MNs followed by DNA polyplex formation with branched polyethylenimine (bPEI) pre-coated in the cavities of polydimethylsiloxane (PDMS) molds that can deliver more DNA vaccine to immune-cell rich epidermis with high transfection efficiency...
2017: Theranostics
https://www.readbyqxmd.com/read/28819247/delta-inulin-based-adjuvants-promote-the-generation-of-polyfunctional-cd4-t-cell-responses-and-protection-against-mycobacterium-tuberculosis-infection
#2
Claudio Counoupas, Rachel Pinto, Gayathri Nagalingam, Warwick J Britton, Nikolai Petrovsky, James A Triccas
There is an urgent need for the rational design of safe and effective vaccines to protect against chronic bacterial pathogens such as Mycobacterium tuberculosis. Advax™ is a novel adjuvant based on delta inulin microparticles that enhances immunity with a minimal inflammatory profile and has entered human trials to protect against viral pathogens. In this report we determined if Advax displays broad applicability against important human pathogens by assessing protective immunity against infection with M. tuberculosis...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818567/a-protein-chimera-including-pspa-in-fusion-with-potd-is-protective-against-invasive-pneumococcal-infection-and-reduces-nasopharyngeal-colonization-in-mice
#3
T R Converso, C Goulart, M Darrieux, L C C Leite
Despite the success of the available polysaccharide-based vaccines against Streptococcus pneumoniae in preventing invasive diseases, this bacterium remains a major cause of death in many parts of the world. New vaccine strategies are needed in order to increase protection. Thus, the utilization of fusion proteins is being investigated as an alternative to the current formulations. In the present work, we demonstrate that a chimeric protein, composed of PspA and PotD in fusion is able to maintain the protective characteristics of both parental proteins, providing protection against systemic infection while reducing nasal colonization...
August 14, 2017: Vaccine
https://www.readbyqxmd.com/read/28813507/comparison-of-homologous-and-heterologous-prime-boost-vaccine-approaches-using-modified-vaccinia-ankara-and-soluble-protein-to-induce-neutralizing-antibodies-by-the-human-cytomegalovirus-pentamer-complex-in-mice
#4
Flavia Chiuppesi, Felix Wussow, Louise Scharf, Heidi Contreras, Han Gao, Zhuo Meng, Jenny Nguyen, Peter A Barry, Pamela J Bjorkman, Don J Diamond
Since neutralizing antibodies (NAb) targeting the human cytomegalovirus (HCMV) pentamer complex (PC) potently block HCMV host cell entry, anti-PC NAb induction is thought to be important for a vaccine formulation to prevent HCMV infection. By developing a vaccine strategy based on soluble PC protein and using a previously generated Modified Vaccinia Ankara vector co-expressing all five PC subunits (MVA-PC), we compared HCMV NAb induction by homologous immunization using prime-boost vaccine regimen employing only PC protein or MVA-PC and heterologous immunization using prime-boost combinations of PC protein and MVA-PC...
2017: PloS One
https://www.readbyqxmd.com/read/28808657/nanoparticulate-tubular-immunostimulating-complexes-novel-formulation-of-effective-adjuvants-and-antigen-delivery-systems
#5
REVIEW
Nina Sanina, Natalia Chopenko, Andrey Mazeika, Eduard Kostetsky
New generation vaccines, based on isolated antigens, are safer than traditional ones, comprising the whole pathogen. However, major part of purified antigens has weak immunogenicity. Therefore, elaboration of new adjuvants, more effective and safe, is an urgent problem of vaccinology. Tubular immunostimulating complexes (TI-complexes) are a new type of nanoparticulate antigen delivery systems with adjuvant activity. TI-complexes consist of cholesterol and compounds isolated from marine hydrobionts: cucumarioside A2-2 (CDA) from Cucumaria japonica and monogalactosyldiacylglycerol (MGDG) from marine algae or seagrass...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28807539/murine-models-for-mucosal-tolerance-in-allergy
#6
REVIEW
Ursula Smole, Irma Schabussova, Winfried F Pickl, Ursula Wiedermann
Immunity is established by a fine balance to discriminate between self and non-self. In addition, mucosal surfaces have the unique ability to establish and maintain a state of tolerance also against non-self constituents such as those represented by the large numbers of commensals populating mucosal surfaces and food-derived or air-borne antigens. Recent years have seen a dramatic expansion in our understanding of the basic mechanisms and the involved cellular and molecular players orchestrating mucosal tolerance...
August 11, 2017: Seminars in Immunology
https://www.readbyqxmd.com/read/28807280/immunization-with-inactivated-antigens-of-neospora-caninum-induces-toll-like-receptors-3-7-8-and-9-in-maternal-fetal-interface-of-infected-pregnant-heifers
#7
M S Marin, Y P Hecker, S Quintana, S E Pérez, M R Leunda, G J Cantón, E R Cobo, D P Moore, A C Odeón
Neospora caninum is an obligate parasite and a major cause of abortion in cattle. Pregnancy failures appear to be associated with weak innate defences on the maternal-fetal interface during infection with N. caninum. Herein, we studied the gene expression of Toll-like receptors (TLRs) in pregnant heifers immunized with different vaccine formulations against N. caninum before mating and then challenged the heifers with live N. caninum on day 70 of gestation. TLR7 and TLR8 expression was upregulated in the placental caruncle of infected-pregnant heifers previously exposed to live N...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28806603/cancer-vaccines-in-the-era-of-checkpoint-blockade-the-magic-is-in-the-adjuvant
#8
REVIEW
Willem W Overwijk
While T cell checkpoint blockade therapy of various cancers yields impressive clinical benefits, most patients are not cured. This is thought to result from insufficient spontaneous tumor-specific T cell responses, a situation that could be remedied with cancer-specific vaccination. Much work is underway to identify cancer-specific antigens, leaving open the question of how to formulate these antigens in a manner that provokes potent cancer-specific T cell responses. In this review I discuss paradigms guiding adjuvant development, and consider what may constitutes a clinically relevant T cell response...
August 11, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28804955/3m-052-as-an-adjuvant-for-a-plga-microparticle-based-leishmania-donovani-recombinant-protein-vaccine
#9
Qian Wang, Meagan A Barry, Christopher A Seid, Elissa M Hudspeth, C Patrick McAtee, Michael J Heffernan
It is believed that an effective vaccine against leishmaniasis will require a T helper type 1 (TH 1) immune response. In this study, we investigated the adjuvanticity of the Toll-like receptor (TLR) 7/8 agonist 3M-052 in combination with the Leishmania donovani 36-kDa nucleoside hydrolase recombinant protein antigen (NH36). NH36 and 3M-052 were encapsulated in separate batches of poly(lactic-co-glycolic acid) (PLGA) microparticles (MPs). The loading efficiency for NH36 was 83% and for 3M-052 was above 95%. In vitro stimulation of bone marrow-derived dendritic cells, measured by IL-12 secretion, demonstrated that 3M-052 (free or MP-formulated) had a concentration-dependent immunostimulatory effect with an optimum concentration of 2 µg/mL...
August 14, 2017: Journal of Biomedical Materials Research. Part B, Applied Biomaterials
https://www.readbyqxmd.com/read/28803715/a-phase-1-randomized-open-label-clinical-study-to-evaluate-the-safety-and-tolerability-of-a-novel-recombinant-hepatitis-e-vaccine
#10
Yu-Feng Cao, Hong Tao, Yue-Mei Hu, Cheng-Bo Shi, Xing Wu, Qi Liang, Chun-Ping Chi, Li Li, Zheng-Lun Liang, Ji-Hong Meng, Feng-Cai Zhu, Zhao-Hui Liu, Xin-Ping Wang
BACKGROUND: This study aimed to evaluate the safety and tolerability for variable dosages of a novel hepatitis E vaccine p179. METHODS: The randomized open-label parallel control phase 1 clinical trial enrolled 120 eligible participants aged 16-65years in Jiangsu Province, China. The experimental groups were randomized to receive different dosages of 20μg, 30μg, and 40μg Hepatitis E Virus (HEV) p179 vaccines, with the 30μgHEV vaccine p239 Hecolin as control, and vaccinated at 0, 1 and 6month intervals...
August 10, 2017: Vaccine
https://www.readbyqxmd.com/read/28794134/mrna-mediates-passive-vaccination-against-infectious-agents-toxins-and-tumors
#11
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/28792466/distinctive-responses-in-an-in-vitro-human-dendritic-cell-based-system-upon-stimulation-with-different-influenza-vaccine-formulations
#12
Gabriela Tapia-Calle, Maaike Stoel, Jacqueline de Vries-Idema, Anke Huckriede
Vaccine development relies on testing vaccine candidates in animal models. However, results from animals cannot always be translated to humans. Alternative ways to screen vaccine candidates before clinical trials are therefore desirable. Dendritic cells (DCs) are the main orchestrators of the immune system and the link between innate and adaptive responses. Their activation by vaccines is an essential step in vaccine-induced immune responses. We have systematically evaluated the suitability of two different human DC-based systems, namely the DC-cell line MUTZ-3 and primary monocyte-derived DCs (Mo-DCs) to screen immunopotentiating properties of vaccine candidates...
August 9, 2017: Vaccines
https://www.readbyqxmd.com/read/28791258/prevention-and-control-strategies-to-counter-dengue-virus-infection
#13
REVIEW
Irfan A Rather, Hilal A Parray, Jameel B Lone, Woon K Paek, Jeongheui Lim, Vivek K Bajpai, Yong-Ha Park
Dengue is currently the highest and rapidly spreading vector-borne viral disease, which can lead to mortality in its severe form. The globally endemic dengue poses as a public health and economic challenge that has been attempted to suppress though application of various prevention and control techniques. Therefore, broad spectrum techniques, that are efficient, cost-effective, and environmentally sustainable, are proposed and practiced in dengue-endemic regions. The development of vaccines and immunotherapies have introduced a new dimension for effective dengue control and prevention...
2017: Frontiers in Cellular and Infection Microbiology
https://www.readbyqxmd.com/read/28789525/direct-loading-of-itep-delivered-ctl-epitopes-onto-mhc-class-i-complexes-on-the-dendritic-cell-surface
#14
Shuyun Dong, Peng Wang, Peng Zhao, Mingnan Chen
Cytotoxic T lymphocyte (CTL)-mediated immune responses are the primary defense mechanism against cancer and infection. CTL epitope peptides have been used as vaccines to boost CTL responses; however, the efficacy of these peptides is suboptimal. Under current vaccine formulation and delivery strategies, these vaccines are delivered into and processed inside antigen presenting cells such as dendritic cells (DCs). However, the intracellular process is not efficient, which at least partially contributes to the suboptimal efficacy of the vaccines...
August 8, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/28780407/microneedles-for-enhanced-transdermal-and-intraocular-drug-delivery
#15
REVIEW
Kurtis Moffatt, Yujing Wang, Thakur Raghu Raj Singh, Ryan F Donnelly
Microneedle mediated delivery based research has garnered great interest in recent years. In the past, the initial focus was delivery of macromolecules of biological origin, however the field has now broadened its scope to include transdermal delivery of conventional low molecular weight drug molecules. Great success has been demonstrated utilising this approach, particularly in the field of vaccine delivery. Current technological advances have permitted an enhancement in design formulation, allowing delivery of therapeutic doses of small molecule drugs and biomolecules, aided by larger patch sizes and scalable manufacture...
August 3, 2017: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/28780391/structural-characterization-and-physicochemical-stability-profile-of-a-double-mutant-heat-labile-toxin-dmlt-protein-based-adjuvant
#16
Vishal M Toprani, John M Hickey, Neha Sahni, Ronald T Toth, George A Robertson, C Russell Middaugh, Sangeeta B Joshi, David B Volkin
A novel protein adjuvant double mutant E.coli heat labile toxin, LT(R192G/L211A) or dmLT, is in preclinical and early clinical development with various vaccine candidates. Structural characterization and formulation development of dmLT will play a key role in its successful process development, scale-up/transfer and commercial manufacturing. This work describes extensive analytical characterization of structural integrity and physicochemical stability profile of dmLT from a lyophilized clinical formulation...
August 2, 2017: Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28780375/adjuvant-formulations-for-virus-like-particle-vlp-based-vaccines
#17
REVIEW
Velasco Cimica, Jose M Galarza
The development of virus-like particle (VLP) technology has had an enormous impact on modern vaccinology. In order to optimize the efficacy and safety of VLP-based vaccines, adjuvants are included in most vaccine formulations. To date, most licensed VLP-based vaccines utilize the classic aluminum adjuvant compositions. Certain challenging pathogens and weak immune responder subjects may require further optimization of the adjuvant formulation to maximize the magnitude and duration of the protective immunity...
August 3, 2017: Clinical Immunology: the Official Journal of the Clinical Immunology Society
https://www.readbyqxmd.com/read/28780119/vaccine-efficacy-against-indonesian-highly-pathogenic-avian-influenza-h5n1-systematic-review-and-meta-analysis
#18
REVIEW
Juan P Villanueva-Cabezas, Mauricio J C Coppo, Peter A Durr, Jodie McVernon
Indonesia has implemented multiple strategies to control Highly Pathogenic Avian Influenza H5N1 (HPAI/H5N1), including the licensure and use of multiple vaccine formulations. The continuous drift of Indonesian HPAI/H5N1 viruses and emergence of a new clade in 2012 that became dominant in 2016, demands the assessment of commercial vaccine formulations against Indonesian field viruses. Seven databases were explored to identify relevant literature reporting performance of commercial vaccines against Indonesian HPAI/H5N1 viruses...
August 2, 2017: Vaccine
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
#19
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/28774565/immunocapture-isotope-dilution-mass-spectrometry-in-response-to-a-pandemic-influenza-threat
#20
Carrie L Pierce, Tracie L Williams, Wanda I Santana, Marnie Levine, Li-Mei Chen, Hans C Cooper, Maria I Solano, Adrian R Woolfitt, Wayne A Marasco, He Fang, Ruben O Donis, John R Barr
As a result of recent advances in mass spectrometry-based protein quantitation methods, these techniques are now poised to play a critical role in rapid formulation of pandemic influenza vaccines. Analytical techniques that have been developed and validated on seasonal influenza strains can be used to increase the quality and decrease the time required to deliver protective pandemic vaccines to the global population. The emergence of a potentially pandemic avian influenza A (H7N9) virus in March of 2013, prompted the US public health authorities and the vaccine industry to initiate production of a pre-pandemic vaccine for preparedness purposes...
July 31, 2017: Vaccine
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