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Alum adjuvant

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https://www.readbyqxmd.com/read/28777067/schistosoma-mansoni-cercarial-elastase-smce-differences-in-immunogenic-properties-of-native-and-recombinant-forms
#1
Marwa H El-Faham, Katherine J Wheatcroft-Francklow, Helen P Price, Jon R Sayers, Michael J Doenhoff
The Schistosoma mansoni cercarial elastase (SmCE) has previously been shown to be poorly immunogenic in mice. However, a minority of mice were able to produce antibodies against SmCE after multiple immunizations with crude preparations containing the enzyme. These mice were partially protected against challenge infections of S. mansoni. In the present study, we show that in contrast to the poor immunogenicity of the enzymatically active native form of SmCE derived from a crude preparation (cercarial transformation fluid), immunization of CBA/Ca mice with two enzymatically inactive forms, namely purified native SmCE or a recombinant SmCE fused to recombinant Schistosoma japonicum glutathione S-transferase (rSmCE-SjGST), after adsorption onto aluminum hydroxide adjuvant, induced specific anti-SmCE immunoglobulin G (IgG) in all mice within 2 weeks of the second immunization...
September 2017: Parasitology
https://www.readbyqxmd.com/read/28767426/human-papillomavirus-16l1-58l2-chimeric-virus-like-particles-elicit-durable-neutralizing-antibody-responses-against-a-broad-spectrum-of-human-papillomavirus-types
#2
Xue Chen, Hongyang Liu, Zhirong Wang, Shuo Wang, Ting Zhang, Meili Hu, Liang Qiao, Xuemei Xu
The neutralizing antibodies elicited by human papillomavirus (HPV) major capsid protein L1 virus-like particle (VLP)-based vaccines are largely type-specific. An HPV vaccine inducing cross-neutralizing antibodies broadly will be cost-effective and of great value. To this end, we constructed HPV16L1-58L2 chimeric VLP (cVLP) by displaying HPV58 L2 aa.16-37 on the DE surface region of HPV16 L1. We found that vaccination with the HPV16L1-58L2 cVLP formulated with alum plus monophosphoryl lipid A (Alum-MPL) adjuvant elicited robust neutralizing antibodies in both mice and rabbits against all tested HPV types including HPV16/31/33/35/52/58 (genus α9), HPV18/39/45/59/68 (genus α7), HPV6/11 (genus α10), HPV2/27/57 (genus α4), and HPV5 (genus β1)...
July 18, 2017: Oncotarget
https://www.readbyqxmd.com/read/28754265/evaluation-of-prevalence-immunogenicity-and-efficacy-of-fyua-iron-receptor-in-uropathogenic-escherichia-coli-isolates-as-a-vaccine-target-against-urinary-tract-infection
#3
Mehri Habibi, Mohammad Reza Asadi Karam, Saeid Bouzari
Uropathogenic Escherichia coli (UPEC) are among the most prevalent agents of urinary tract infections (UTIs). Antibiotic resistance reaches the need for alternative treatment approaches such as vaccination against UTIs. There is no ideal vaccine against UTIs, thus there is a need to evaluate different targets of uropathogens against UTIs. Ferric scavenger receptor FyuA in UPEC has the properties of an ideal vaccine candidate against UTIs. In the present study, the prevalence of FyuA among UPEC isolates, its immunogenicity with and without alum adjuvant, and its efficacy against experimental UTI were assessed...
July 25, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28741316/role-of-cd4-t-cell-helper-subsets-in-immune-response-and-deviation-of-cd8-t-cells-in-mice
#4
Alison Hogg, Yongjun Sui, Shlomo Z Ben-Sasson, William E Paul, Jay A Berzofsky
The ability of different CD4(+) T cell subsets to help CD8(+) T-cell response is not fully understood. Here, we found using the murine system that Th17 cells induced by IL-1β, unlike Th1, were not effective helpers for antiviral CD8 responses as measured by IFNγ-producing cells or protection against virus infection. However, they skewed CD8 responses to a Tc17 phenotype. Thus, the apparent lack of help was actually immune deviation. This skewing depended on both IL-21 and IL-23. To overcome this effect, we inhibited Th17 induction by blocking TGF-β...
July 24, 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28735080/recombinant-truncated-e-protein-as-a-new-vaccine-candidate-against-nontypeable-h-%C3%A2-influenzae-its-expression-and-immunogenic-evaluation
#5
Ava Behrouzi, Saeid Bouzari, Farzam Vaziri, Abolfazl Fateh, Parviz Afrough, Atefeh Davoudi Vijeh Motlagh, Seyed Davar Siadat
Protein E (PE) is a conserved entity observed in both nontypeable Haemophilus influenzae (NTHi) and encapsulated H. influenzae. This is a small surface lipoprotein, consisting of only 160 amino acids, involved in the adhesion of H. influenzae to various types of epithelial cells. A 384-bp-long fragment from NTHi PE was cloned into the prokaryotic expression vector pBAD-gIIIA. The recombinant protein was expressed with arabinose and then purified by affinity purification on an Ni-NTA agarose matrix. BALB/c mice were immunized by subcutaneous injection with purified recombinant truncated PE mixed with an alum adjuvant...
July 19, 2017: Microbial Pathogenesis
https://www.readbyqxmd.com/read/28734174/old-and-new-adjuvants
#6
REVIEW
Amy S McKee, Philippa Marrack
Adjuvants have been deliberately added to vaccines since the 1920's when alum was discovered to boost antibody responses, leading to better protection. The first adjuvants were discovered by accident and were used in the safer but less immunogenic subunit vaccines, supposedly by providing an antigen depot to extend antigen presentation. Since that time, much has been discovered about how these adjuvants impact cells at the tissue site to activate innate immune responses, mobilize dendritic cells and drive adaptive immunity...
July 19, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28728074/no-pain-no-gain-adjuvant-effects-of-alum-and-monophosphoryl-lipid-a-in-pertussis-and-hpv-vaccines
#7
REVIEW
Thomas C Mitchell, Carolyn R Casella
Development of non-infectious subunit vaccines is hampered by a slow pipeline of new adjuvants to replace or enhance alum in part because expectations of safety are high. Transient vaccine side effects are not clinical priorities because they cause no lasting harm and vaccine development has appropriately been focused on avoidance of serious adverse events. As a result, surprisingly little is known about the extent to which side effects caused by a vaccine's reactogencicity are predictive of successful immunization outcomes...
July 17, 2017: Current Opinion in Immunology
https://www.readbyqxmd.com/read/28719287/phase-1-randomized-study-of-a-tetravalent-dengue-purified-inactivated-vaccine-in-healthy-adults-in-the-united-states
#8
Alexander C Schmidt, Leyi Lin, Luis J Martinez, Richard C Ruck, Kenneth H Eckels, Alix Collard, Rafael De La Barrera, Kristopher M Paolino, Jean-François Toussaint, Edith Lepine, Bruce L Innis, Richard G Jarman, Stephen J Thomas
AbstractThe safety and immunogenicity of four formulations of an investigational tetravalent dengue purified inactivated vaccine (DPIV), formulated at 1 or 4 μg with aluminum hydroxide (alum) or at 1 μg with an adjuvant system (AS01E or AS03B), were evaluated in a first-time-in-human, placebo-controlled, randomized, observer-blind, phase 1 trial in the continental United States. Two doses of vaccine or placebo were administered intramuscularly 4 weeks apart to 100 healthy adults 18-39 years of age, randomized 1:1:1:1:1 to receive one of four DPIV formulations or saline placebo...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28718065/structure-function-relationships-of-protein-lipopeptide-complexes-and-influence-on-immunogenicity
#9
Acep R Wijayadikusumah, Lucy C Sullivan, David C Jackson, Brendon Y Chua
The lipopeptide, R4Pam2Cys, associates electrostatically with soluble protein antigens and significantly enhances their ability to induce protective humoral and cell-mediated responses. We demonstrate that antibody titers elicited by the antigen ovalbumin (OVA) associated with R4Pam2Cys are higher than those elicited by OVA in the presence of alum and comparable to those elicited by OVA formulated with complete Freund's adjuvant (CFA). The hierarchy of anti-OVA antibody avidities was CFA > R4Pam2Cys = alum...
July 17, 2017: Amino Acids
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
#10
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/28708895/yeast-expressed-recombinant-as16-protects-mice-against-ascaris-suum-infection-through-induction-of-a-th2-skewed-immune-response
#11
Junfei Wei, Leroy Versteeg, Zhuyun Liu, Brian Keegan, Ana Clara Gazzinelli-Guimarães, Ricardo T Fujiwara, Neima Briggs, Kathryn M Jones, Ulrich Strych, Coreen M Beaumier, Maria Elena Bottazzi, Peter J Hotez, Bin Zhan
BACKGROUND: Ascariasis remains the most common helminth infection in humans. As an alternative or complementary approach to global deworming, a pan-anthelminthic vaccine is under development targeting Ascaris, hookworm, and Trichuris infections. As16 and As14 have previously been described as two genetically related proteins from Ascaris suum that induced protective immunity in mice when formulated with cholera toxin B subunit (CTB) as an adjuvant, but the exact protective mechanism was not well understood...
July 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28699823/the-gmz2-malaria-vaccine-from-concept-to-efficacy-in-humans
#12
Michael Theisen, Bright Adu, Benjamin Mordmüller, Subhash Singh
GMZ2 is a recombinant protein consisting of conserved domains of GLURP and MSP3, two asexual blood-stage antigens of Plasmodium falciparum, and is designed with the aim of mimicking naturally acquired anti-malarial immunity. The rationale for combining these two antigens is based on a series of immune epidemiological studies from geographically diverse malaria endemic regions; functional in vitro studies; and pre-clinical studies in rodents and New World monkeys. GMZ2 adjuvanted with alhydrogel® (alum) was well tolerated and immunogenic in three phase 1 studies...
September 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/28669593/pathogen-mimicking-vaccine-delivery-system-designed-with-a-bioactive-polymer-inulin-acetate-for-robust-humoral-and-cellular-immune-responses
#13
Sunny Kumar, Siddharth S Kesharwani, Bhimanna Kuppast, Mohammed Ali Bakkari, Hemachand Tummala
New and improved vaccines are needed against challenging diseases such as malaria, tuberculosis, Ebola, influenza, AIDS, and cancer. The majority of existing vaccine adjuvants lack the ability to significantly stimulate the cellular immune response, which is required to prevent the aforementioned diseases. This study designed a novel particulate based pathogen-mimicking vaccine delivery system (PMVDS) to target antigen-presenting-cells (APCs) such as dendritic cells. The uniqueness of PMVDS is that the polymer used to prepare the delivery system, Inulin Acetate (InAc), activates the innate immune system...
September 10, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28665747/analysis-of-immunological-mechanisms-exerted-by-hbsag-hbig-therapeutic-vaccine-combined-with-adefovir-in-chronic-hepatitis-b-patients
#14
Chenliang Zhou, Chaofan Li, Guo-Zhong Gong, Shuang Wang, Ji-Ming Zhang, Dao-Zhen Xu, Li-Min Guo, Hong Ren, Min Xu, Qing Xie, Chen Pan, Jie Xu, Zhongyu Hu, Shuang Geng, Xian Zhou, Xianzheng Wang, Xiaoyu Zhou, Haili Mi, Gan Zhao, Wencong Yu, Yu-Mei Wen, Lihua Huang, Xuan-Yi Wang, Bin Wang
An HBsAg-HBIG therapeutic vaccine (Yeast-derived Immune Complexes, YIC) for chronic hepatitis B (CHB) patients has undergone a series of clinical trials. The HBeAg sero-conversion rate of YIC varied from 21.9% to 14% depending on the immunization protocols from 6 to 12 injections. To analyze the immunological mechanisms exerted by 6 injections of YIC, 44 CHB patients were separately immunized with YIC, alum as adjuvant control or normal saline as blank control, with add on of antiviral drug Adefovir in all groups...
June 30, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28662722/yeast-lysates-carrying-the-nucleoprotein-from-measles-virus-vaccine-as-a-novel-subunit-vaccine-platform-to-deliver-plasmodium-circumsporozoite-antigen
#15
Daria Jacob, Claude Ruffie, Chantal Combredet, Pauline Formaglio, Rogerio Amino, Robert Ménard, Frédéric Tangy, Monica Sala
BACKGROUND: Yeast cells represent an established bioreactor to produce recombinant proteins for subunit vaccine development. In addition, delivery of vaccine antigens directly within heat-inactivated yeast cells is attractive due to the adjuvancy provided by the yeast cell. In this study, Pichia pastoris yeast lysates carrying the nucleoprotein (N) from the measles vaccine virus were evaluated as a novel subunit vaccine platform to deliver the circumsporozoite surface antigen (CS) of Plasmodium...
June 29, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28621112/increased-immunogenicity-and-protective-efficacy-of-the-p-aeruginosa-vaccine-in-mice-using-an-alum-and-de-o-acylated-lipooligosaccharide-adjuvant-system
#16
Ji In Ryu, Seo Ri Wui, Ara Ko, Yeon Jeong Lee, Hien Thi Thu Do, Hark Jun Kim, In Moo Rhee, Shin Ae Park, Kwang Sung Kim, Yang Je Cho, Na Gyong Lee
Pseudomonas aeruginosa (P. aeruginosa) is an opportunistic pathogen that commonly causes fatal infections in cystic fibrosis and burn patients as well as in patients who are hospitalized or have impaired immune systems. P. aeruginosa infections are difficult to treat due to the high resistance of the pathogen to conventional antibiotics. Despite several efforts, no effective prophylactic vaccines against P. aeruginosa are currently available. In this study, we investigated the activity of the CIA06 adjuvant system, which is comprised of alum and de-O-acylated lipooligosaccharide, on a P...
June 16, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28619071/new-adenovirus-based-vaccine-vectors-targeting-pfs25-elicit-antibodies-that-inhibit-plasmodium-falciparum-transmission
#17
Kathleen A McGuire, Kazutoyo Miura, Christopher M Wiethoff, Kim C Williamson
BACKGROUND: An effective malaria transmission-blocking vaccine (TBV) would be a major advance in the current efforts to eliminate and, ultimately, eradicate malaria. Antibodies against Plasmodium falciparum surface protein, Pfs25, are known to block parasite development in the mosquito vector. However, in initial clinical trials the limited immunogenicity of recombinant Pfs25 protein-in-adjuvant vaccines has been a challenge. METHODS: Novel human adenovirus type 5 (Ad5) vectors were used in heterologous prime boost vaccination strategies to augment the immune response against Pfs25...
June 15, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28600891/spontaneous-food-allergy-in-was-mice-occurs-independent-of-fc%C3%AE%C2%B5ri-mediated-mast-cell-activation
#18
W S Lexmond, J A Goettel, B F Sallis, K McCann, E H H M Rings, E Jensen-Jarolim, S Nurko, S B Snapper, E Fiebiger
BACKGROUND: Food allergies are a growing health problem, and the development of therapies that prevent disease onset is limited by the lack of adjuvant-free experimental animal models. We compared allergic sensitization in patients with food allergy or Wiskott-Aldrich syndrome (WAS) and defined whether spontaneous disease in Was(-/-) mice recapitulates the pathology of a conventional disease model and/or human food allergy. METHODS: Comparative ImmunoCAP ISAC microarray was performed in patients with food allergy or WAS...
June 10, 2017: Allergy
https://www.readbyqxmd.com/read/28595972/17%C3%AE-ethynylestradiol-alters-the-peritoneal-immune-response-of-gilthead-seabream
#19
N E Gómez González, I Cabas, M C Rodenas, M Arizcun, V Mulero, A García Ayala
17α-Ethynylestradiol (EE2), a synthetic estrogen used in most oral contraceptives pills and hormone replacement therapies, is found in many water bodies, where it can modulate the fish immune response. EE2 acts as an endocrine disruptor in gilthead seabream, Sparus aurata L., a marine teleost fish of great economic value in Mediterranean aquaculture, as it induces hepatic vitellogenin gene (vtg) expression. Moreover, EE2 also alters the capacity of gilthead seabream to appropriately respond to infection although it does not behave as an immunosuppressor...
June 9, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28592561/vaccine-priming-is-restricted-to-draining-lymph-nodes-and-controlled-by-adjuvant-mediated-antigen-uptake
#20
Frank Liang, Gustaf Lindgren, Kerrie J Sandgren, Elizabeth A Thompson, Joseph R Francica, Anja Seubert, Ennio De Gregorio, Susan Barnett, Derek T O'Hagan, Nancy J Sullivan, Richard A Koup, Robert A Seder, Karin Loré
The innate immune mechanisms by which adjuvants enhance the potency and protection of vaccine-induced adaptive immunity are largely unknown. We introduce a model to delineate the steps of how adjuvant-driven innate immune activation leads to priming of vaccine responses using rhesus macaques. Fluorescently labeled HIV-1 envelope glycoprotein (Env) was administered together with the conventional aluminum salt (alum) adjuvant. This was compared to Env given with alum with preabsorbed Toll-like receptor 7 (TLR7) ligand (alum-TLR7) or the emulsion MF59 because they show superiority over alum for qualitatively and quantitatively improved vaccine responses...
June 7, 2017: Science Translational Medicine
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