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Vaccine, immunization

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https://www.readbyqxmd.com/read/27926921/schistosoma-mansoni-infection-can-jeopardize-the-duration-of-protective-levels-of-antibody-responses-to-immunizations-against-hepatitis-b-and-tetanus-toxoid
#1
Diana K Riner, Eric M Ndombi, Jennifer M Carter, Amos Omondi, Nupur Kittur, Emmy Kavere, Harrison K Korir, Briana Flaherty, Diana Karanja, Daniel G Colley
BACKGROUND: Schistosomiasis is a disease of major public health importance in sub-Saharan Africa. Immunoregulation begins early in schistosome infection and is characterized by hyporesponsiveness to parasite and bystander antigens, suggesting that a schistosome infection at the time of immunization could negatively impact the induction of protective vaccine responses. This study examined whether having a Schistosoma mansoni infection at the time of immunization with hepatitis B and tetanus toxoid (TT) vaccines impacts an individual's ability to achieve and maintain protective antibody levels against hepatitis B surface antigen or TT...
December 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27926861/immunometabolic-pathways-in-bcg-induced-trained-immunity
#2
Rob J W Arts, Agostinho Carvalho, Claudia La Rocca, Carla Palma, Fernando Rodrigues, Ricardo Silvestre, Johanneke Kleinnijenhuis, Ekta Lachmandas, Luís G Gonçalves, Ana Belinha, Cristina Cunha, Marije Oosting, Leo A B Joosten, Giuseppe Matarese, Reinout van Crevel, Mihai G Netea
The protective effects of the tuberculosis vaccine Bacillus Calmette-Guerin (BCG) on unrelated infections are thought to be mediated by long-term metabolic changes and chromatin remodeling through histone modifications in innate immune cells such as monocytes, a process termed trained immunity. Here, we show that BCG induction of trained immunity in monocytes is accompanied by a strong increase in glycolysis and, to a lesser extent, glutamine metabolism, both in an in-vitro model and after vaccination of mice and humans...
December 6, 2016: Cell Reports
https://www.readbyqxmd.com/read/27926826/potential-of-a-bpv1-l1-vlp-vaccine-to-prevent-bpv1-or-bpv2-induced-pseudo-sarcoid-formation-and-safety-and-immunogenicity-of-ecpv2-l1-vlps-in-the-horse
#3
Edmund K Hainisch, Hans Abel-Reichwald, Saeed Shafti-Keramat, Barbara Pratscher, Annunziata Corteggio, Giuseppe Borzacchiello, Maria Wetzig, Christoph Jindra, Alexander Tichy, Reinhard Kirnbauer, Sabine Brandt
We have previously shown that immunization of horses with BPV1 L1 virus-like particles (VLP) is safe and highly immunogenic, and that bovine papillomavirus types 1 and 2 (BPV1, BPV2) are closely related serotypes. Here we evaluated the protective potential of a BPV1 L1 VLP vaccine against experimental BPV1 and BPV2 challenge, and studied the safety and immunogenicity of a bivalent EcPV2/BPV1 L1 VLP vaccine. Fourteen healthy horses were immunized with BPV1 L1 VLPs (100 µg/injection) plus adjuvant on days 0 and 28, whilst seven remained unvaccinated...
December 7, 2016: Journal of General Virology
https://www.readbyqxmd.com/read/27926825/mycobacterium-malmesburyense-sp-nov-a-novel-non-tuberculous-mycobacterium-species-revealed-by-multiple-gene-sequence-characterization
#4
Nomakorinte Gcebe, Victor Rutten, Nicolaas Gey van Pittius, Brendon Naicker, Anita Michel
Non-tuberculous mycobacteria (NTM) are ubiquitous in the environment and an increasing number of NTM species have been isolated and characterized from both humans and animals, highlighting the zoonotic potential of these bacteria. Host exposure to NTM may impact on cross-reactive immune responsiveness which may affect diagnosis of bovine tuberculosis and may also play a role in the variability of the efficacy of Mycobacterium bovis BCG vaccination against tuberculosis. In this study we characterized 10 NTM isolates originating from water, soil, nasal swabs of cattle and African buffalo as well as bovine tissue samples...
December 5, 2016: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/27926522/il-10-expression-defines-an-immunosuppressive-dendritic-cell-population-induced-by-antitumor-therapeutic-vaccination
#5
Diana Llopiz, Marta Ruiz, Stefany Infante, Lorea Villanueva, Leyre Silva, Sandra Hervas-Stubbs, Diego Alignani, Elizabeth Guruceaga, Juan J Lasarte, Pablo Sarobe
Vaccination induces immunostimulatory signals that are often accompanied by regulatory mechanisms such as IL-10, which control T-cell activation and inhibit vaccine-dependent antitumor therapeutic effect. Here we characterized IL-10-producing cells in different tumor models treated with therapeutic vaccines. Although several cell subsets produced IL-10 irrespective of treatment, an early vaccine-dependent induction of IL-10 was detected in dendritic cells (DC). IL-10 production defined a DC population characterized by a poorly mature phenotype, lower expression of T-cell stimulating molecules and upregulation of PD-L1...
December 1, 2016: Oncotarget
https://www.readbyqxmd.com/read/27926486/novel-epstein-barr-virus-like-particles-incorporating-gh-gl-ebna1-or-gb-lmp2-induce-high-neutralizing-antibody-titers-and-ebv-specific-t-cell-responses-in-immunized-mice
#6
Elizabeth M Perez, Joslyn Foley, Timelia Tison, Rute Silva, Javier Gordon Ogembo
Previous Epstein-Barr virus (EBV) prophylactic vaccines based on the major surface glycoprotein gp350/220 as an immunogen have failed to block viral infection in humans, suggesting a need to target other viral envelope glycoproteins. In this study, we reasoned that incorporating gH/gL or gB, critical glycoproteins for viral fusion and entry, on the surface of a virus-like particle (VLP) would be more immunogenic than gp350/220 for generating effective neutralizing antibodies to prevent viral infection of both epithelial and B cell lines...
December 1, 2016: Oncotarget
https://www.readbyqxmd.com/read/27925894/prevention-of-herpes-zoster-and-its-complications-from-clinical-evidence-to-real-life-experience
#7
Giovanni Gabutti, Paolo Bonanni, Michele Conversano, Guido Fanelli, Elisabetta Franco, Donato Greco, Giancarlo Icardi, Marzia Lazzari, Alessandro Rossi, Silvestro Scotti, Antonio Volpi
Herpes zoster (HZ) is an acute viral illness characterized by a vesicular rash with unilateral distribution, which can also result in severe complications such as post-herpetic neuralgia (PHN), ophthalmic zoster, stroke or other neurological complications. The estimate incidence in Europe ranges between 2.0 and 4.6 cases per 1,000 person-years, with a sharp increase in >50 year-old subjects. Currently, treatment options for HZ are only partially effective in limiting the acute phase, while the management of complications is complex and often unsatisfactory...
December 7, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27925856/clinical-and-economic-impact-of-herpes-zoster-vaccination-in-elderly-in-italy
#8
Sara Boccalini, Cristiano Alicino, Domenico Martinelli, Angela Bechini, Emilia Tiscione, Barbara Pellizzari, Rosa Prato, Giancarlo Icardi, Stefania Iannazzo, Paolo Bonanni
Herpes zoster (HZ) is a very relevant pathology among elderly people (≥ 60 years of age), with a considerable disease burden and loss of quality of life. In the last years a new vaccine against HZ became available in Italy. Therefore, the Italian decision makers are now confronted with the decision whether that vaccination should be implemented. Pharmaco-economic analyses represent useful tools to value the feasibility of new immunization programs and their sustainability. To this aim, an ad hoc population model was developed in order to value the clinical and economic impact of HZ vaccination program for the elderly in Italy...
December 7, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27925847/effectiveness-of-hepatitis-a-vaccination-as-post-exposure-prophylaxis
#9
Ignasi Parrón, Caritat Planas, Pere Godoy, Sandra Manzanares-Laya, Ana Martínez, Maria Rosa Sala, Sofia Minguell, Nuria Torner, Mireia Jané, Angela Domínguez
Hepatitis A (HA) has been a vaccine-preventable disease since 1995. In Catalonia, a universal combined hepatitis A+B vaccination program of preadolescents was initiated at the end of 1998. However, outbreaks are reported each year and post-exposure prophylaxis (PEP) with hepatitis A virus (HAV) vaccine or immunoglobulin (IG) is recommended to avoid cases. The aim of this study was to assess the effectiveness of HAV vaccine and IG in preventing hepatitis A cases in susceptible exposed people. A retrospective cohort study of contacts of HA cases involved in outbreaks reported in Catalonia between January 2006 and December 2012 was made...
December 7, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27925844/a-two-dose-heterologous-prime-boost-vaccine-regimen-eliciting-sustained-immune-responses-to-ebola-zaire-could-support-a-preventive-strategy-for-future-outbreaks
#10
Georgi Shukarev, Benoit Callendret, Kerstin Luhn, Macaya Douoguih, The Ebovac Consortium
The consequences of the 2013-16 Ebola Zaire virus disease epidemic in West Africa were grave. The economies, healthcare systems and communities of Guinea, Sierra Leone and Liberia were devastated by over 18 months of active Ebola virus transmission, followed by sporadic resurgences potentially related to sexual transmission by survivors with viral persistence in body fluids following recovery. The need to develop and implement strategies to prevent and mitigate future outbreaks is now beyond dispute. The potential for unpredictable outbreaks of indeterminate duration, and control challenges posed by the possibility of sporadic re-emergence, mean that implementation of an effective vaccination programme for outbreak containment necessitates a vaccine providing durable immunity...
December 7, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27925503/persistence-of-protective-anti-hbs-antibody-levels-and-anamnestic-response-to-hbv-booster-vaccination-a-cross-sectional-study-among-healthcare-students-20%C3%A2-years-following-the-universal-immunization-campaign-in-italy
#11
Guglielmo Dini, Alessandra Toletone, Ilaria Barberis, Nicoletta Debarbieri, Emanuela Massa, Chiara Paganino, Francesca Bersi, Alfredo Montecucco, Cristiano Alicino, Paolo Durando
Vaccination against Hepatitis B Virus (HBV) became mandatory in Italy for all newborns and twelve years-old individuals in the 1991. The immunogenicity of HBV vaccine and the effectiveness of the universal immunization strategy have been widely demonstrated. However the need to assess the antibody concentrations above the well known serological correlate of protection for HBV infection (≥ 10 mIU/mL), established in individuals immunized with a three doses vaccination course, is still recommended in subjects exposed to occupational risks in different settings, particularly the healthcare services...
December 7, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27924822/il-21-dependent-expansion-of-memory-like-nk-cells-enhances-protective-immune-responses-against-mycobacterium-tuberculosis
#12
S Venkatasubramanian, S Cheekatla, P Paidipally, D Tripathi, E Welch, A R Tvinnereim, R Nurieva, R Vankayalapati
Natural killer (NK) cells are traditionally considered as innate cells, but recent studies suggest that NK cells can distinguish antigens, and that memory NK cells expand and protect against viral pathogens. Limited information is available about the mechanisms involved in memory-like NK cell expansion, and their role in bacterial infections and vaccine-induced protective immune responses. In the current study, using a mouse model of tuberculosis (TB) infection, we found that interferon-gamma producing CD3-NKp46+CD27+KLRG1+ memory-like NK cells develop during Bacille Calmette-Guérin vaccination, expand, and provide protection against challenge with Mycobacterium tuberculosis (M...
December 7, 2016: Mucosal Immunology
https://www.readbyqxmd.com/read/27924731/improved-immunogenicity-against-a-her2-neu-derived-peptide-by-employment-of-a-pan-hla-dr-binding-epitope-and-cpg-in-a-balb-c-mice-model
#13
Sahar Tahaghoghi-Hajghorbani, Jalil Tavakkol-Afshari, Mahmoud Reza Jaafari, Haniyeh Ghaffari-Nazari, Elham Masoumi, Seyed Amir Jalali
BACKGROUND: An efficient strategy to improve the immunogenicity of peptide vaccines is the use of a synthetic peptide containing cytotoxic T-lymphocyte (CTL) epitopes with T-helper (Th) inducing-epitopes. OBJECTIVE: Our purpose was to determine the use of human epidermal growth factor receptor-2 (Her2/neu)-specific CTL epitopes plus the pan HLA DR-binding epitope (PADRE) and CpG oligodeoxynucleotides (ODNs) to induce antitumor effects in vaccinated mice. METHOD: Female BALB/c mice were immunized with subcutaneously the different vaccines...
December 6, 2016: Anti-cancer Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/27924688/susceptibility-to-vaccine-preventable-diseases-and-vaccination-adherence-among-healthcare-workers-in-italy-a-cross-sectional-survey-at-a-regional-acute-care-university-hospital-and-a-systematic-review
#14
Umberto Leone Roberti Maggiore, Carolina Scala, Alessandra Toletone, Nicoletta Debarbieri, Mauro Perria, Beatrice D'Amico, Alfredo Montecucco, Mariano Martini, Guglielmo Dini, Paolo Durando
Healthcare Workers (HCWs) have an increased risk both to acquire and to spread vaccine preventable diseases (VPDs) both to their colleagues and, especially, to vulnerable patients. The prevention of occupational hazards among HCWs is based on proper adoption of the standard and additional precautions, immunizations, and secondary preventive measures, such as post-exposure prophylaxis. Moreover, HCWs are often referred to as the most trusted source of vaccine-related information for their patients. In the present article, we report the findings of a cross-sectional study investigating the compliance to vaccinations among HCWs employed at the Obstetric Unit of a regional acute-care University Hospital in Northern Italy...
December 7, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27924687/the-fluad-case-in-italy-could-it-have-been-dealt-differently
#15
Miriam Levi, Ersilia Sinisgalli, Chiara Lorini, Francesca Santomauro, Martina Chellini, Paolo Bonanni
During the influenza vaccination campaign 2014-2015, the reporting of three deaths within 48 hours of vaccination with Fluad brought the Italian Medicines Agency (AIFA) to pronounce the withdrawal of two batches of vaccine, based on the precautionary principle. Investigations by the Istituto Superiore di Sanità, the National Institute of Health, and by the Pharmacovigilance Risk Assessment Committee (PRAC), the committee at the European Medicines Agency (EMA) responsible for monitoring and assessing the safety profiles of human drugs, concluded that there was a lack of causality between the reported deaths and the vaccines administered...
December 7, 2016: Human Vaccines & Immunotherapeutics
https://www.readbyqxmd.com/read/27923955/measles-outbreak-among-previously-immunized-healthcare-workers-the-netherlands-2014
#16
Susan J M Hahné, Laura M Nic Lochlainn, Nathalie D van Burgel, Jeroen Kerkhof, Jussi Sane, Kioe Bing Yap, Rob S van Binnendijk
BACKGROUND:  We investigated a measles outbreak among healthcare workers (HCWs) by assessing laboratory characteristics, measles vaccine effectiveness, and serological correlates for protection. METHODS:  Cases were laboratory-confirmed measles in HCWs from hospital X during weeks 12-20 of 2014. We assessed cases' severity and infectiousness by using a questionnaire. We tested cases' sera for measles immunoglobulin M, immunoglobulin G, avidity, and plaque reduction neutralization (PRN)...
December 15, 2016: Journal of Infectious Diseases
https://www.readbyqxmd.com/read/27923769/recombination-in-hepatitis-c-virus-is-not-uncommon-among-people-who-inject-drugs-in-kolkata-india
#17
Debanjali Gupta, Kallol Saha, Aritra Biswas, Rushna Firdaus, Monika Ghosh, Provash Chandra Sadhukhan
Recombination in RNA virus is a rare event in the survival and evolution to evade host immune system. This is increasing within high risk group population (HRG) due to super infection that occurs by continuous sharing of common drug equipment by HCV infected or HIV-HCV co-infected recurrent drug users. Recombination causes impediment to vaccine development and therapeutic intervention as standard HCV treatment is still genotype specific. Blood samples of 194 people who inject drugs (PWID) were collected from an Opioid Substitution Therapy Centre in Kolkata,India...
December 3, 2016: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/27923642/development-of-ifn-%C3%AE-secretory-elispot-based-assay-for-screening-of-adcc-responses
#18
Ashwini Shete, Poonam Suryawanshi, Chetan Chavan, Archana Kulkarni, Sheela Godbole, Manisha Ghate, Madhuri Thakar
Antibody Dependent Cell mediated Cytotoxicity has been established as one of the important protective immune mechanisms against HIV making it essential to evaluate it while testing immunogenicity of emerging vaccine candidates. IFN-γ secretory ELISPOT assay, widely used for evaluation of CTL response in HIV vaccine trials, was adapted for measuring ADCC responses and the results were compared with the standard ICS based assays. IFN-γ responses by both the methods were compared in plasma samples of 23 HIV infected individuals against Env and Gag peptides using granulocytes as antigen presenting cells...
December 3, 2016: Journal of Immunological Methods
https://www.readbyqxmd.com/read/27923570/recombinant-dna-vaccine-of-hantavirus-gn-and-lamp1-induced-long-term-immune-protection-in-mice
#19
Dong-Bo Jiang, Li-Juan Sun, Lin-Feng Cheng, Jin-Peng Zhang, Shao-Bo Xiao, Yuan-Jie Sun, Shu-Ya Yang, Jing Wang, Fang-Lin Zhang, Kun Yang
BACKGROUND: Prophylaxis is widely adopted the best choice against Hemorrhagic fever with renal syndrome (HFRS) caused by Hantavirus. However, loss of memory immune response maintenance remains as major shortcoming in current HFRS vaccine. A recombinant DNA vaccine, pVAX-LAMP/Gn was previously proved efficient, requiring long-term evaluations. METHODS & RESULTS: Immune responses of Balb/c mice were assessed by specific and neutralizing antibodies, interferon-γ ELISpot assay, and cytotoxic T-lymphocyte cytotoxicity assay...
December 3, 2016: Antiviral Research
https://www.readbyqxmd.com/read/27923018/understanding-immune-responses-to-the-influenza-vaccine
#20
Richard Webby
No abstract text is available yet for this article.
December 6, 2016: Nature Medicine
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