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https://www.readbyqxmd.com/read/28719287/phase-1-randomized-study-of-a-tetravalent-dengue-purified-inactivated-vaccine-in-healthy-adults-in-the-united-states
#1
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/28718786/egg-independent-influenza-vaccines-and-vaccine-candidates
#2
REVIEW
Ilaria Manini, Claudia Maria Trombetta, Giacomo Lazzeri, Teresa Pozzi, Stefania Rossi, Emanuele Montomoli
Vaccination remains the principal way to control seasonal infections and is the most effective method of reducing influenza-associated morbidity and mortality. Since the 1940s, the main method of producing influenza vaccines has been an egg-based production process. However, in the event of a pandemic, this method has a significant limitation, as the time lag from strain isolation to final dose formulation and validation is six months. Indeed, production in eggs is a relatively slow process and production yields are both unpredictable and highly variable from strain to strain...
July 18, 2017: Vaccines
https://www.readbyqxmd.com/read/28718050/dissolving-microneedle-patches-for-dermal-vaccination
#3
REVIEW
M Leone, J Mönkäre, J A Bouwstra, G Kersten
The dermal route is an attractive route for vaccine delivery due to the easy skin accessibility and a dense network of immune cells in the skin. The development of microneedles is crucial to take advantage of the skin immunization and simultaneously to overcome problems related to vaccination by conventional needles (e.g. pain, needle-stick injuries or needle re-use). This review focuses on dissolving microneedles that after penetration into the skin dissolve releasing the encapsulated antigen. The microneedle patch fabrication techniques and their challenges are discussed as well as the microneedle characterization methods and antigen stability aspects...
July 17, 2017: Pharmaceutical Research
https://www.readbyqxmd.com/read/28717032/th17-mediated-cross-protection-against-pneumococcal-carriage-by-vaccination-with-a-variable-antigen
#4
Kirsten Kuipers, Wouter S P Jong, Christa E van der Gaast-de Jongh, Diane Houben, Fred van Opzeeland, Elles Simonetti, Saskia van Selm, Ronald de Groot, Marije I Koenders, Taj Azarian, Elder Pupo, Peter van der Ley, Jeroen D Langereis, Aldert Zomer, Joen Luirink, Marien I de Jonge
Serotype-specific protection against a Streptococcus pneumoniae is an important limitation of the current polysaccharide-based vaccines. To prevent serotype replacement, reduce transmission and limit emergence of new variants, it is essential to induce broad protection and restrict pneumococcal colonization. In this study, we used a prototype vaccine formulation consisting of LPS-detoxified outer membrane vesicles (OMVs) from Salmonella Typhimurium displaying the variable N-terminus of PspA (α1α2) for intranasal vaccination, which induced strong Th17 immunity associated with substantial reduction of pneumococcal colonization...
July 17, 2017: Infection and Immunity
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
#5
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/28716140/modelling-infectious-diseases-with-relapse-a-case-study-of-hsv-2
#6
Jinliang Wang, Xiaoqing Yu, Heidi L Tessmer, Toshikazu Kuniya, Ryosuke Omori
BACKGROUND: Herpes Simplex Virus Type 2 (HSV-2) is one of the most common sexually transmitted diseases. Although there is still no licensed vaccine for HSV-2, a theoretical investigation of the potential effects of a vaccine is considered important and has recently been conducted by several researchers. Although compartmental mathematical models were considered for each special case in the previous studies, as yet there are few global stability results. RESULTS: In this paper, we formulate a multi-group SVIRI epidemic model for HSV-2, which enables us to consider the effects of vaccination, of waning vaccine immunity, and of infection relapse...
July 17, 2017: Theoretical Biology & Medical Modelling
https://www.readbyqxmd.com/read/28712326/calcium-phosphate-nanoparticles-as-a-new-generation-vaccine-adjuvant
#7
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...
July 17, 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/28711387/serotype-distribution-and-antimicrobial-susceptibility-pattern-in-children%C3%A2-5years-with-invasive-pneumococcal-disease-in-india-a-systematic-review
#8
REVIEW
Jyotsana Singh, Suba Sundaresan, Anand Manoharan, Anita Shet
BACKGROUND: Streptococcus pneumoniae is a leading cause of childhood diseases that result in significant morbidity and mortality in India. Commercially licensed and available pneumococcal conjugate vaccines (PCVs) include ten (PCV-10) and 13 (PCV-13) pneumococcal serotypes. Vaccines with other serotype combinations are under development. Reviewing and reporting trends and distribution of pneumococcal serotypes causing invasive pneumococcal disease in India will be useful for policy making as PCV is being introduced into India's universal immunization program...
July 12, 2017: Vaccine
https://www.readbyqxmd.com/read/28708957/influenza-vaccination-in-the-elderly
#9
Smetana Jan, Chlibek Roman, Shaw Jana, Splino Miroslav, Prymula Roman
Seasonal influenza is a prevalent and serious annual illness resulting in widespread morbidity and economic disruption throughout the population; the elderly and immunocompromised are particularly vulnerable to serious sequelae and mortality. The changing demographics worldwide to an aging society have important implications for public health policy and pharmaceutical innovations. For instance, primary prevention via immunization is effective in reducing the burden of influenza illness among the elderly. However, the elderly may be insufficiently protected by vaccination due to the immunosenescence which accompanies aging...
July 14, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28708953/trends-of-influenza-b-during-the-2010-2016-seasons-in-two-regions-of-north-and-south-italy-the-impact-of-the-vaccine-mismatch-on-influenza-immunisation-strategy
#10
Andrea Orsi, Giuseppina Maria Elena Colomba, Fanny Pojero, Giuseppe Calamusa, Cristiano Alicino, Cecilia Trucchi, Paola Canepa, Filippo Ansaldi, Francesco Vitale, Fabio Tramuto
Influenza A and B viruses are responsible for respiratory infections, representing globally seasonal threats to human health. The two viral types often co-circulate and influenza B plays an important role in the spread of infection. A 6-year retrospective surveillance study was conducted between 2010 and 2016 in two large administrative regions of Italy, located in the north (Liguria) and in the south (Sicily) of the country, in order to describe the burden and epidemiology of both B/Victoria and B/Yamagata lineages in different healthcare settings...
July 14, 2017: Human Vaccines & Immunotherapeutics
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 14, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28705515/combination-vaccine-strategies-to-prevent-enteric-infections
#12
Richard Walker, Peter Dull
New vaccine candidates entering the current routine immunization schedule can best be accommodated as combination vaccines. A combined Shigella and enterotoxigenic E. coli (ETEC) vaccine could greatly benefit children in disease-endemic areas. New candidates are getting closer to being able to meet these needs, but they raise numerous strategic questions related to presentation, formulation, and regulatory approach. The "Combination Vaccine Strategies to Prevent Enteric Infections" workshop at the 2016 Vaccines Against Shigella and ETEC (VASE) Conference examined some of the considerations for developing such vaccines against enteric pathogens...
July 10, 2017: Vaccine
https://www.readbyqxmd.com/read/28701762/different-repeat-annual-influenza-vaccinations-improve-the-antibody-response-to-drifted-influenza-strains
#13
Ewan P Plant, Lucy J Fredell, Blake A Hatcher, Xing Li, Meng-Jung Chiang, Martina Kosikova, Hang Xie, Olga Zoueva, Angelia A Cost, Zhiping Ye, Michael J Cooper
Seasonal influenza vaccine formulas change almost every year yet information about how this affects the antibody repertoire of vaccine recipients is inadequate. New vaccine virus strains are selected, replacing older strains to better match the currently circulating strains. But even while the vaccine is being manufactured the circulating strains can evolve. The ideal response to a seasonal vaccine would maintain antibodies toward existing strains that might continue to circulate, and to generate cross-reactive antibodies, particularly towards conserved influenza epitopes, potentially limiting infections caused by newly evolving strains...
July 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28699823/the-gmz2-malaria-vaccine-from-concept-to-efficacy-in-humans
#14
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...
July 12, 2017: Expert Review of Vaccines
https://www.readbyqxmd.com/read/28698120/effectiveness-of-formalin-killed-vaccines-containing-cpg-oligodeoxynucleotide-1668-adjuvants-against-vibrio-harveyi-in-orange-spotted-grouper
#15
Hai Trong Nguyen, Thuy Thi Thu Nguyen, Yi-Ting Wang, Pei-Chyi Wang, Shih-Chu Chen
Vibrio harveyi is a major bacterial pathogen that causes serious vibriosis in cultured groupers, leading to massive deaths. In this study, we evaluated the immune responses and protective efficacy of vaccines containing V. harveyi formalin-killed cells (FKC) formulated with CpG ODN 1668-enriched plasmids (p30CpG and p60CpG) in the orange-spotted grouper. Results indicated that antibody titres were remarkably increased in vaccinated fish 2 weeks post-immunisation. Expression level of major histocompatibility complex (MHC) class II, CD 8, and toll-like receptor 9 was significantly upregulated in the spleen of fish immunised with CpG ODN 1668-adjuvanted vaccines, as recorded at 6 weeks after immunisation...
July 8, 2017: Fish & Shellfish Immunology
https://www.readbyqxmd.com/read/28698066/nasal-nanovaccines
#16
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/28689773/the-toll-like-receptor-ligands-hiltonol-%C3%A2-polyiclc-and-imiquimod-effectively-activate-antigen-specific-immune-responses-in-tasmanian-devils-sarcophilus-harrisii
#17
Amanda L Patchett, Cesar Tovar, Lynn M Corcoran, A Bruce Lyons, Gregory M Woods
Devil facial tumour disease (DFTD) describes two genetically distinct transmissible tumours that pose a significant threat to the survival of the Tasmanian devil. A prophylactic vaccine could protect devils from DFTD transmission. For this vaccine to be effective, potent immune adjuvants will be required. Toll-like receptors (TLRs) promote robust immune responses in human cancer studies and are highly conserved across mammalian species. In this study, we investigated the proficiency of TLR ligands for immune activation in the Tasmanian devil using in vitro mononuclear cell stimulations and in vivo immunisation trials with a model antigen...
July 6, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28687406/comparative-efficacy-and-toxicity-of-two-vaccine-candidates-against-sporothrix-schenckii-using-either-montanide%C3%A2-pet-gel-a-or-aluminum-hydroxide-adjuvants-in-mice
#18
Deivys Leandro Portuondo, Alexander Batista-Duharte, Lucas Souza Ferreira, Cleverton Roberto de Andrade, Camila Quinello, Damiana Téllez-Martínez, Maria Luiza de Aguiar Loesch, Iracilda Zeppone Carlos
Sporotrichosis is an important zoonosis in Brazil and the most frequent subcutaneous mycosis in Latin America, caused by different Sporothrix species. Currently, there is no effective vaccine available to prevent this disease. In this study, the efficacy and toxicity of the adjuvant Montanide™ Pet Gel A (PGA) formulated with S. schenckii cell wall proteins (ssCWP) was evaluated and compared with that of aluminum hydroxide (AH). Balb/c mice received two subcutaneous doses (1st and 14th days) of either the unadjuvanted or adjuvanted vaccine candidates...
July 4, 2017: Vaccine
https://www.readbyqxmd.com/read/28685134/vaccinations-against-respiratory-infections-in-arabian-gulf-countries-barriers-and-motivators
#19
Amani S Alqahtani, Daniah M Bondagji, Abdullah A Alshehari, Mada H Basyouni, Tariq M Alhawassi, Nasser F BinDhim, Harunor Rashid
AIM: To study the uptake, barriers and motivators of influenza, pneumococcal, meningococcal and pertussis vaccines among members of public in Arabian Gulf countries. METHODS: A cross-sectional survey among the Gulf Cooperation Council (GCC) countries' residents. Data collected electronically through a smartphone app. The survey variables aimed to investigate the respondents' awareness about vaccines against influenza, pneumococcal, meningococcal and pertussis infections...
June 16, 2017: World Journal of Clinical Cases
https://www.readbyqxmd.com/read/28684909/nanoparticle-allergen-complexes-for-allergen-immunotherapy
#20
REVIEW
Gabriella Di Felice, Paolo Colombo
Allergen-specific immunotherapy was introduced in clinical settings more than 100 years ago. It remains the only curative approach to treating allergic disorders that ameliorates symptoms, reduces medication costs, and blocks the onset of new sensitizations. Despite this clinical evidence and knowledge of some immunological mechanisms, there remain some open questions regarding the safety and efficacy of this treatment. This suggests the need for novel therapeutic approaches that attempt to reduce the dose and frequency of treatment administration, improving patient compliance, and reducing costs...
2017: International Journal of Nanomedicine
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