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https://www.readbyqxmd.com/read/28922621/a-21-winter-seasons-retrospective-study-of-antibody-response-after-influenza-vaccination-in-elderly-60-85%C3%A2-years-old-and-very-elderly-85%C3%A2-years-old-institutionalized-subjects
#1
Emilia Nunzi, Anna Maria Iorio, Barbara Camilloni
Influenza vaccination is considered the best mean for preventing the higher rates of mortality associated with influenza virus infection in the elderly as compared with younger people. Since the number of very elderly subjects, aged >85 years, is rapidly increasing, and some authors reported increments in influenza-associated mortality with age, the aim of this study was to increase the limited information available on the immunogenicity of the influenza vaccines in this age group. This was a retrospective study which analyzed the antibody response induced by commercially available trivalent inactivated influenza vaccines in 1491 elderly subjects (60-85 years old) and 1139 very elderly subjects (>85 years old) during 21 winter seasons included between 1993-1994 and 2014-2015...
September 18, 2017: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/28922045/monomeric-m2e-antigen-in-vesivax%C3%A2-liposomes-stimulates-protection-against-type-a-strains-of-influenza-comparable-to-liposomes-with-multimeric-forms-of-m2e
#2
J P Adler-Moore, W Ernst, H Kim, N Ward, S M Chiang, T Do, G Fujii
Given the interest in the ectodomain of the matrix 2 (M2e) channel protein as a target for development of a universal influenza vaccine, we examined the role of the antigen configuration of M2e in generating a protective immune response. A series of M2e mutations and a truncated M2e segment were prepared as a means of controlling the formation of monomer, dimer, and higher order multimeric forms of M2e. Each of these M2e peptides was incorporated into a liposome-based vaccine technology platform previously shown to stimulate a protective response to influenza A infection using M2e as a mixture of monomers, dimers and multimers (L-M2e1-HD/MPL)...
September 18, 2017: Journal of Liposome Research
https://www.readbyqxmd.com/read/28921566/pegylation-of-cationic-liposomes-encapsulating-soluble-leishmania-antigens-sla-reduces-the-adjuvant-efficacy-of-liposomes-in-murine-model
#3
Hadi Naseri, Faezeh Eskandari, Mahmoud Reza Jaafari, Ali Khamesipour, Azam Abbasi, Ali Badiee
Although there have been several attempts to develop a vaccine against leishmaniasis; no vaccine in human has been developed yet. Liposomes consisting of 1, 2-dioleoyl-3-trimethylammonium-propane (DOTAP) encapsulating soluble Leishmania antigens (SLA) enhance protective immunity of SLA against L. major infection in mice. However, they immobilized at the injection site because of their positive charge. To overcome the problem, shielding the surface charge with polyethylene glycol (PEGylation) was chosen in this study...
September 16, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28919737/bacterial-membrane-vesicles-as-novel-nanosystems-for-drug-delivery
#4
REVIEW
Sapna Jain, Jonathan Pillai
Bacterial membrane vesicles (BMVs) are closed spherical nanostructures that are shed naturally and ubiquitously by most bacterial species both in vivo and in vitro. Researchers have elucidated their roles in long-distance transport of a wide array of cargoes, such as proteins, toxins, antigens, virulence factors, microbicidal agents and antibiotics. Given that these natural carriers are important players in intercellular communication, it has been hypothesized that they are equally well attuned for transport and delivery of exogenous therapeutic cargoes...
2017: International Journal of Nanomedicine
https://www.readbyqxmd.com/read/28919557/synergistic-effects-of-dendritic-cell-targeting-and-laser-microporation-on-enhancing-epicutaneous-skin-vaccination-efficacy
#5
Yoan Machado, Sanne Duinkerken, Veronika Hoepflinger, Melissa Mayr, Evgeniia Korotchenko, Almedina Kurtaj, Isabel Pablos, Markus Steiner, Angelika Stoecklinger, Joyce Lübbers, Maximillian Schmid, Uwe Ritter, Sandra Scheiblhofer, Michael Ablinger, Verena Wally, Sarah Hochmann, Anna M Raninger, Dirk Strunk, Yvette van Kooyk, Josef Thalhamer, Richard Weiss
Due to its unique immunological properties, the skin is an attractive target tissue for allergen-specific immunotherapy. In our current work, we combined a dendritic cell targeting approach with epicutaneous immunization using an ablative fractional laser to generate defined micropores in the upper layers of the skin. By coupling the major birch pollen allergen Bet v 1 to mannan from S. cerevisiae via mild periodate oxidation we generated hypoallergenic Bet-mannan neoglycoconjugates, which efficiently targeted CD14+ dendritic cells and Langerhans cells in human skin explants...
September 14, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28917531/hollow-microneedle-mediated-intradermal-delivery-of-model-vaccine-antigen-loaded-plga-nanoparticles-elicits-protective-t-cell-mediated-immunity-to-an-intracellular-bacterium
#6
Anne Marit de Groot, Guangsheng Du, Juha Mönkäre, Anouk C M Platteel, Femke Broere, Joke A Bouwstra, Alice J A M Sijts
The skin is an attractive organ for immunization due to the presence of a large number of epidermal and dermal antigen-presenting cells. Hollow microneedles allow for precise and non-invasive intradermal delivery of vaccines. In this study, ovalbumin (OVA)-loaded poly(lactic-co-glycolic acid) (PLGA) nanoparticles with and without TLR3 agonist poly(I:C) were prepared and administered intradermally by hollow microneedles. The capacity of the PLGA nanoparticles to induce a cytotoxic T cell response, contributing to protection against intracellular pathogens, was examined...
September 13, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28915996/alternative-strategy-for-visceral-leishmaniosis-control-hisak70-salmonella-choleraesuis-pulsed-dendritic-cells
#7
Gustavo Domínguez-Bernal, Abel Martínez-Rodrigo, Alicia Mas, M Mar Blanco, José A Orden, Ricardo De La Fuente, Javier Carrión
Here, we describe a novel approach that exploits an attenuated mutant of Salmonella enterica serovar Choleraesuis as carrier to deliver a plasmid encoding protein HisAK70. Subsequently, dendritic cells (DCs) were pulsed with this vaccine vector. The aim of this study was to evaluate the effectiveness of the prepared HisAK70-S. Choleraesuis-pulsed DCs (HisAK70-SAL DCs) against visceral leishmaniosis (VL). In our ex vivo model of infection, the prepared formulations could decrease parasite growth by up to 80% by augmenting the production of IL-12p40 and by reducing arginase activity (ARG)...
October 2017: Comparative Immunology, Microbiology and Infectious Diseases
https://www.readbyqxmd.com/read/28915391/hepatitis-b-surface-antigen-incorporated-in-dissolvable-microneedle-array-patch-is-antigenic-and-thermostable
#8
Danielle Poirier, Frédéric Renaud, Vincent Dewar, Laurent Strodiot, Florence Wauters, Jim Janimak, Toshio Shimada, Tatsuya Nomura, Koki Kabata, Koji Kuruma, Takayuki Kusano, Masaki Sakai, Hideo Nagasaki, Takayoshi Oyamada
Alternatives to syringe-based administration are considered for vaccines. Intradermal vaccination with dissolvable microneedle arrays (MNA) appears promising in this respect, as an easy-to-use and painless method. In this work, we have developed an MNA patch (MNAP) made of hydroxyethyl starch (HES) and chondroitin sulphate (CS). In swines, hepatitis B surface antigen (HBsAg) formulated with the saponin QS-21 as adjuvant, both incorporated in HES-based MNAP, demonstrated the same level of immunogenicity as a commercially available aluminum-adjuvanted HBsAg vaccine, after two immunizations 28 days apart...
August 29, 2017: Biomaterials
https://www.readbyqxmd.com/read/28914197/characterization-of-inherent-particles-and-mechanism-of-thermal-stress-induced-particle-formation-in-hsv-2-viral-vaccine-candidate
#9
Lillian Li, Marina Kirkitadze, Kamaljit Bhandal, Cristopher Roque, Eric Yang, Bruce Carpick, Nausheen Rahman
BACKGROUND: Vaccine formulations may contain visible and/or subvisible particles, which can vary in both size and morphology. Extrinsic particles, which are particles not part of the product such as foreign contaminants, are generally considered undesirable and should be eliminated or controlled in injectable products. However, biological products, in particular vaccines, may also contain particles that are inherent to the product. Here we focus on the characterization of visible and subvisible particles in a live, replication-deficient viral vaccine candidate against HSV genital herpes in an early developmental stage...
September 14, 2017: Current Pharmaceutical Biotechnology
https://www.readbyqxmd.com/read/28913330/resurgence-of-diphtheria-in-north-kerala-india-2016-laboratory-supported-case-based-surveillance-outcomes
#10
Lucky Sangal, Sudhir Joshi, Shalini Anandan, Veeraraghavan Balaji, Jaichand Johnson, Asish Satapathy, Pradeep Haldar, Ramesh Rayru, Srinath Ramamurthy, Asha Raghavan, Pankaj Bhatnagar
INTRODUCTION: As part of national program, laboratory supported vaccine preventable diseases surveillance was initiated in Kerala in 2015. Mechanisms have been strengthened for case investigation, reporting, and data management. Specimens collected and sent to state and reference laboratories for confirmation and molecular surveillance. The major objective of this study is to understand the epidemiological information generated through surveillance system and its utilization for action...
2017: Frontiers in Public Health
https://www.readbyqxmd.com/read/28911033/formulation-of-chitosan-with-the-polyepitope-hiv-1-protein-candidate-vaccine-efficiently-boosts-cellular-immune-responses-in-mice
#11
Ehsan Ollah Jazaeri, Atiyeh Mahdavi, Asghar Abdoli
Human immunodeficiency virus-1 (HIV-1) continues to be a major global public health issue and priority. Despite the variety of antiretroviral therapies, it seems that an effective vaccine against HIV-1 is still very necessary. An ideal HIV-1 vaccine should be able to elicit both humoral and cellular immunities. In this respect, polyepitope vaccines, incorporated from several conserved regions of HIV-1 proteins, have received much attention recently. Herein, the immunogenicity of the HIV-1 polyepitope protein-based candidate vaccines was evaluated in BALB/c mice...
November 30, 2017: Pathogens and Disease
https://www.readbyqxmd.com/read/28910935/-application-of-state-space-model-in-the-evaluation-of-the-prevention-and-control-for-mumps
#12
C Luo, R Z Li, Q Q Xu, P Xiong, Y X Liu, F Z Xue, Q Xu, X J Li
Objective: To analyze the epidemiological characteristics of mumps in 2012 and 2014, and to explore the preventive effect of the second dose of mumps-containing vaccine (MuCV) in mumps in Shandong province. Methods: On the basis of certain model assumptions, a Space State model was formulated. Iterated Filter was applied to the epidemic model to estimate the parameters. Results: The basic reproduction number (R(0)) for children in schools was 4.49 (95%CI: 4.30-4.67) and 2.50 (95%CI: 2.38-2.61) respectively for the year of 2012 and 2014...
September 10, 2017: Zhonghua Liu Xing Bing Xue za Zhi, Zhonghua Liuxingbingxue Zazhi
https://www.readbyqxmd.com/read/28910565/an-in-vivo-study-adjuvant-activity-of-poly-n-vinyl-2-pyrrolidone-co-acrylic-acid-on-immune-responses-against-melanoma-synthetic-peptide
#13
Kadriye Kızılbey, Banu Mansuroğlu, Serap Derman, Zeynep Mustafaeva Akdeste
INTRODUCTION: Peptides have been studied as an important class of components in medicine to control many major diseases with vaccination. Polymers as adjuvants are capable of enhancing the vaccine potential against various diseases by improving the delivery of antigens, and they reduce the booster doses of vaccines. In brief, polymers are promising candidates for peptide-based vaccine delivery platforms. The purpose of the present study was to create a possible alternative approach in the treatment of malignant melanoma and/or to prevent metastasis of melanoma...
September 14, 2017: Bioengineered
https://www.readbyqxmd.com/read/28906131/effects-of-immunomodulators-on-the-response-induced-by-vaccines-against-autoimmune-diseases
#14
Dante J Marciani
A promising treatment for T-cell-mediated autoimmune diseases is the induction of immune tolerance by modulating the immune response against self-antigens, an objective that may be achieved by vaccination. There are two main types of vaccines currently under development. The tolerogenic vaccines, composed of proteins formed by a cytokine fused to a self-antigen, which usually induce tolerance by eliminating the T-cells that are immune reactive against the self-antigen. The immunogenic vaccines, comprised of a self-antigen plus a sole Th2 adjuvant either free or conjugated, that alleviate autoimmunity by switching the immune response against the self-antigen, from a damaging pro-inflammatory Th1/Th17 to an anti-inflammatory Th2 immunity...
September 14, 2017: Autoimmunity
https://www.readbyqxmd.com/read/28903506/a-population-based-assessment-of-the-impact-of-7-and-13-valent-pneumococcal-conjugate-vaccines-on-macrolide-resistant-invasive-pneumococcal-disease-emergence-and-decline-of-streptococcus-pneumoniae-serotype-19a-cc320-with-dual-macrolide-resistance-mechanisms
#15
Max R Schroeder, Scott T Chancey, Stephanie Thomas, Wan-Hsuan Kuo, Sarah W Satola, Monica M Farley, David S Stephens
Background: Macrolide efflux encoded by mef(E)/mel and ribosomal methylation encoded by erm(B) confer most macrolide resistance in Streptococcus pneumoniae. Introduction of the heptavalent pneumococcal conjugate vaccine (PCV7) in 2000 reduced macrolide-resistant invasive pneumococcal disease (MR-IPD) due to PCV7 serotypes (6B, 9V, 14, 19F, and 23F). Methods: In this study, the impact of PCV7 and PCV13 on MR-IPD was prospectively assessed. A 20-year study of IPD performed in metropolitan Atlanta, Georgia, using active, population-based surveillance formed the basis for this study...
September 15, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28903312/gnp-gapdh1-22-nanovaccines-prevent-neonatal-listeriosis-by-blocking-microglial-apoptosis-and-bacterial-dissemination
#16
Ricardo Calderon-Gonzalez, Elisabet Frande-Cabanes, Hector Teran-Navarro, José María Marimon, Javier Freire, David Salcines-Cuevas, M Carmen Fariñas, Claudia Onzalez-Rico, Marco Marradi, Isabel Garcia, Mirian Alkorta-Gurrutxaga, Aida San Nicolas-Gomez, Ana Castañeda-Sampedro, 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...
August 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28903024/neospora-caninum-in-non-pregnant-and-pregnant-mouse-models-cross-talk-between-infection-and-immunity
#17
REVIEW
Adriana Aguado-Martínez, Afonso P Basto, Alexandre Leitão, Andrew Hemphill
Neospora caninum is a cyst-forming coccidian which causes abortion in cattle, with a high economic impact globally. Vaccination is considered to be the most cost-effective strategy to control and prevent bovine neosporosis. However, there is no commercial vaccine available to date. To investigate this disease under laboratory conditions, mouse models were developed, and they have been efficiently used as an initial proof-of-concept platform to investigate different immunogenic formulations. We here provide a detailed review on the current knowledge on immunity against neosporosis in non-pregnant as well as pregnant mice, and present a general overview of the most relevant parameters that may be responsible for protective immunity, which in turn could be relevant for vaccine development...
September 10, 2017: International Journal for Parasitology
https://www.readbyqxmd.com/read/28901553/total-leishmania-antigens-with-poly-i-c-induce-th1-protective-response
#18
Maria Victoria Sanchez, Ricardo Javier Eliçabe, María Silvia Di Genaro, María José Germanó, Susana Gea, María Fernanda García Bustos, María Cristina Salomón, Eduardo Alberto Scodeller, Diego Esteban Cargnelutti
AIMS: Our proposal was to develop a vaccine based on total Leishmania antigens (TLA) adjuvanted with polyinosinic-polycytidylic acid [Poly(I:C)] able to induce a Th1 response which can provide protection against Leishmania infection. METHODS AND RESULTS: Mice were vaccinated with two doses of TLA-Poly(I:C) administered by subcutaneous route at three week interval. Humoral and cellular immune responses induced by the immunization were measured. The protective efficacy of the vaccine was evaluated by challenging mice with infective promastigotes of Leishmania (Leishmania) amazonensis into the footpad...
September 13, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28893476/growth-hormone-releasing-peptide-6-enhanced-antibody-titers-against-subunit-antigens-in-mice-balb-c-tilapia-oreochromis-niloticus-and-african-catfish-clarias-gariepinus
#19
Rebeca Martínez, Liz Hernández, Lázaro Gil, Yamila Carpio, Antonio Morales, Fidel Herrera, Alina Rodríguez-Mallón, Yeny Leal, Aracelys Blanco, Mario Pablo Estrada
Modern subunit vaccines have excellent safety profiles and improved tolerability, but do not elicit strong immune responses without the addition of adjuvants. Developing a safe and affective adjuvant remains a challenge for peptide-based vaccine design. Growth Hormone Releasing Peptide-6 (GHRP-6) is one of the earliest-developed, synthetic, peptidyl growth hormone secretagogue receptor agonists. These compounds mimic the effect of the endogenous ligand, ghrelin. In the present study, we evaluated the ability of GHRP-6 to enhance the humoral immune response against co-injected antigens in mice, tilapia and African catfish...
September 8, 2017: Vaccine
https://www.readbyqxmd.com/read/28893294/hiv-i-nef-inhibitors-a-novel-class-of-hiv-specific-immune-adjuvants-in-support-of-a-cure
#20
REVIEW
Gregory A Dekaban, Jimmy D Dikeakos
The success of many current vaccines relies on a formulation that incorporates an immune activating adjuvant. This will hold true for the design of a successful therapeutic HIV vaccine targeted at controlling reactivated virus following cessation of combined antiretroviral therapy (cART). The HIV accessory protein Nef functions by interfering with HIV antigen presentation through the major histocompatibility complex I (MHC-I) pathway thereby suppressing CD8(+) cytotoxic T cell (CTL)-mediated killing of HIV infected cells...
September 12, 2017: AIDS Research and Therapy
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