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... Pseudomonas aeruginosa antimicrobial resistance is a major therapeutic challenge. DNA vaccination is an attractive approach for antigen-specific immunotherapy against P. aeruginosa. We explored the feasibility of employing Herpes simplex virus type 1 tegument protein, VP22, as a molecular tool to enhance the immunogenicity of an OprF DNA vaccine against P. aeruginosa. Recombinant DNA vaccines, pVA ...
Anne Schneeweiss; Stefan Chabierski; Mathias Salomo; Nicolas Delaroque; Samiya Al-Robaiy; Thomas Grunwald; Kurt Bürki; Uwe G. Liebert; Sebastian Ulbert
... West Nile Virus (WNV) is an emerging pathogenic flavivirus with increasing distribution worldwide. Birds are the natural host of the virus, but also mammals, including humans, can be infected. In some cases, a WNV infection can be associated with severe neurological symptoms. All currently available WNV vaccines are in the veterinary sector, and there is a need to develop safe and effective immuni ...
... Current vaccine candidates against Rift Valley fever virus (RVFV) incorporate the viral structural glycoproteins as antigens, since triggering antibody responses against them usually correlates with protection. Here, we have focused solely on the nucleoprotein of RVFV as a potential target for vaccine development. Previous studies in mouse models have already demonstrated that RVFV nucleoprotein c ...
... Cancer-associated fibroblasts (CAFs), major components of the tumor microenvironment (TME), promote tumor growth and metastasis and inhibit the anti-tumor immune response. We previously constructed a DNA vaccine expressing human FAPα, which is highly expressed by CAFs, to target these cells in the TME, and observed limited anti-tumor effects in the 4T1 breast cancer model. When the treatment time ...
David I. Bernstein; Marcela F. Pasetti; Rebecca Brady; Amanda D. Buskirk; Rezwanul Wahid; Michelle Dickey; Mitchell Cohen; Holly Baughman; Jill El-Khorazaty; Nicole Maier; Marcelo B. Sztein; Shahida Baqar; A. Louis Bourgeois
... The public health burden of Enterotoxigenic Escherichia coli (ETEC) is high but no vaccine is specifically approved to prevent ETEC infections.We performed a Phase 1, dose escalation study (1–50 µg) evaluating the sublingual (SL) delivery of the double mutant heat-labile toxin LTR192G/L211A (dmLT) in 80 healthy adult volunteers. The primary objective was safety and the secondary was the immunogeni ...
Sharon E. Frey; Kathleen R. Lottenbach; Heather Hill; Tamara P. Blevins; Yinyi Yu; Ying Zhang; Karen E. Brenneman; Sandra M. Kelly-Aehle; Caitlin McDonald; Angela Jansen; Roy Curtiss
... Live, attenuated, orally-administered Salmonella strains are excellent vectors for vaccine antigens and are attractive as vaccines based on previous use of S. Typhimurium in animals. A Phase I dose escalation trial was conducted to evaluate the safety and immunogenicity of three newly constructed recombinant attenuated Salmonella enterica serovar Typhi vaccine (RASV) vectors synthesizing Streptoco ...
... Large-scale outbreaks of enterovirus 71 (EV71) infections have occurred in Asia-Pacific regions. Severe complications include encephalitis and poliomyelitis-like paralysis, cardiopulmonary collapse, and death, necessitating an effective vaccine against EV71.In this randomized Phase I study, we evaluated the safety and immunogenicity of an inactivated alum-adjuvanted EV71 whole-virus vaccine produc ...
Papillomaviridae; adolescents; antibodies; antibody formation; antigens; blood serum; complement; diphtheria; humans; immunogenicity; serotypes; tetanus; vaccination; vaccines; United States
Abstract:
... MenACYW-TT is an investigational quadrivalent meningococcal conjugate vaccine intended for use in individuals ≥6 weeks of age. We evaluated the safety and immunogenicity of MenACYW-TT when compared to a licensed quadrivalent conjugate meningococcal vaccine (Menveo®; MCV4-CRM; GlaxoSmithKline, Italy), and when co-administered with tetanus, diphtheria, acellular pertussis (Tdap) and human papilloma ...
Sven-Arne Silfverdal; Giancarlo Icardi; Timo Vesikari; Sheryl A. Flores; Marco F. Pagnoni; Jin Xu; G. Frank Liu; Jon E. Stek; Florence Boisnard; Stéphane Thomas; Eddy Ziani; Andrew W. Lee
... Combination vaccines simplify vaccination visits and improve coverage and timeliness. DTaP5-HB-IPV-Hib is a new investigational, fully-liquid, combination vaccine designed to protect against 6 infectious diseases, including 5 pertussis antigens and OMPC instead of PT as conjugated protein for Hib component.In this multicenter, double-blind, comparator-controlled, Phase III study (NCT01480258) cond ...
... A nasal influenza vaccine has been available only in a live attenuated form, which limits the range of recipients to immune-competent individuals. The present study evaluated a newly developed intranasal inactivated influenza vaccine with a novel adjuvant, heat-labile enterotoxin (LT) derived from E. coli (LTh(αK)).The study was a randomized, double-blind, controlled phase I trial to evaluate the ...
... Chlamydia trachomatis (Ct) is the most common sexually transmitted bacterial pathogen in the World and there is an urgent need for a vaccine to prevent these infections. To determine what type of adjuvant can better enhance the immunogenicity of a Chlamydia vaccine, we formulated the recombinant major outer membrane protein (Ct-rMOMP) with several ligands for Toll-like receptors (TLR) and the nucl ...
Hepatitis B virus; Influenza A virus; adjuvants; antigens; biomimetics; body weight changes; encapsulation; immunization; influenza; influenza vaccines; lymph nodes; memory; nucleoproteins; peptides; temperature; vaccine development
Abstract:
... Here we present a biomimetic strategy towards an influenza vaccine design based on hepatitis B virus core virus-like particles (HBc VLP). To this end, a temperature-shift based encapsulation process based on analysis of the unique thermal-associated structural flexibility of HBc VLP nanocages was proposed and proved efficient for encapsulation of antigen inside the VLP. By displaying a matrix prot ...
... Vibrio harveyi is a severe aquaculture pathogen that can infect a large number of fish species. In previous studies, we have identified two protective immunogens, DegQ and Vhp1, from pathogenic V. harveyi strains. In this study, we examined the potentials of DegQ and Vhp1 as monovalent and bivalent DNA vaccines in a Japanese flounder (Paralichthys olivaceus) model. For this purpose, the DNA vaccin ...
... Avian pathogenic Escherichia coli (APEC), a leading cause of avian airsacculitis and colibacillosis, is responsible for significant economic loss in the poultry industry. APEC serogroups O1, O2, and O78 are predominantly associated with disease. Lipopolysaccharide (LPS) O-antigen has been shown to be a potent antigen for inducing specific protective immune responses. Therefore, we sought to develo ...
... Pneumococcal and Salmonella typhi infections are two major diseases for children in developing countries. For typhoid fever, licensed Vi polysaccharide vaccines are ineffective in children <2-year old. While investigational Vi conjugate vaccines have been shown effective in clinical trials, they are currently only available to restricted areas. Pneumococcal capsular polysaccharide conjugate vaccin ...
... Noroviruses are the main cause of severe viral gastroenteritis, which results in estimated 200,000 deaths each year, primarily in children in the developing world. Genogroup II.4 (GII.4) strains are responsible for the majority of norovirus outbreaks. Enterovirus 71 (EV71), the leading causative agent of hand, foot and mouth disease, has recently been prevalent in Asia-Pacific regions, resulting i ...
Salmonella Paratyphi A; Salmonella Typhi; antigens; developed countries; epidemiology; fever; multiple drug resistance; typhoid fever; vaccines; Asia
Abstract:
... Enteric fever has been one of the leading causes of severe illness and deaths worldwide. S. Typhi and S. Paratyphi A, B and C are important enteric fever-causing organisms globally. This infection causes about 21 million cases among which 222,000 typhoid related deaths occurred in 2015. These estimates do not reflect the ultimate and real status of the disease due to the lack of unified diagnostic ...
Escherichia coli; Influenza A virus; antibodies; antigens; immunization; ion channels; mice; molecular weight; pandemic; progeny; vaccine development; vaccines; virus replication
Abstract:
... To prevent a future influenza A virus subtype pandemic outbreak, developing a broad-spectrum vaccine would be highly beneficial. The ion channel protein M2 is highly conserved in a diverse number of influenza A virus subtypes. This distinguishing characteristic makes M2 an attractive vaccine target for a broadly protective vaccine. We expressed a full-length M2 protein which was C-terminally fused ...
... Neisseria meningitidis causes epidemics of meningitis in sub-Saharan Africa. These have mainly been caused by capsular group A strains, but W and X strains are increasingly contributing to the burden of disease. Therefore, an affordable vaccine that provides broad protection against meningococcal disease in sub-Saharan Africa is required.We prepared Generalized Modules for Membrane Antigens (GMMA) ...
... The extracellular domain of the matrix protein 2 (M2e) of influenza viruses is highly conserved among all influenza A subtypes, making it a suitable target for a universal influenza vaccine. In this study, we demonstrated an enhanced immune response and protection of a chimeric M2e vaccine against influenza A viruses using our newly developed vaccine platform, the norovirus P particle, to present ...
Annebel R. De Vleeschauwer; Xiaocui Zhou; David J. Lefebvre; Annabelle Garnier; Fleur Watier; Charly Pignon; Sandrine A. Lacour; Stephan Zientara; Labib Bakkali-Kassimi; Kris De Clercq; Bernard Klonjkowski
... Vaccination is a key element in the control of foot-and-mouth disease (FMD). The majority of the antigenic sites that induce protective immune responses are localized on the FMD virus (FMDV) capsid that is formed by four virus-encoded structural proteins, VP1 to VP4. In the present study, recombinant canine adenovirus type 2 (CAV2)-based FMD vaccines, Cav-P1/3C R° and Cav-VP1 R°, respectively expr ...
... We conducted a phase I clinical trial of a cell culture-derived AS03-adjuvanted influenza vaccine containing HA antigen (A/Indonesia/05/2005(H5N1)/PR8-IBCDC-RG2) derived from EB66 cells (KD-295).Healthy male adult volunteers (20–40 years old, N=60) enrolled in the study were divided into 3 groups, the MA group (3.8μg of HA+AS03), HA group (7.5μg of HA+AS03), and 1/2 MA group (half the volume of th ...
Jaya Chakravarty; Subodh Kumar; Sonali Trivedi; Vijay K. Rai; Anup Singh; Jill A. Ashman; Elsa M. Laughlin; Rhea N. Coler; Stuart J. Kahn; Anna Marie Beckmann; Karen D. Cowgill; Steven G. Reed; Shyam Sundar; Franco M. Piazza
... Healthy Indian adult volunteers, with or without a history of leishmaniasis, were evaluated for evidence of previous infection with Leishmania donovani based on the direct agglutination test (DAT). Three cohorts of 6 DAT-negative and 6 DAT-positive subjects were enrolled in an open-label, dose-escalating, uncontrolled clinical trial and received three injections of the LEISH-F1+MPL-SE vaccine (con ...
... Porcine circovirus type 2 (PCV2) vaccination has been effective in protecting pigs from clinical disease and today is used extensively. Recent studies in vaccinated populations indicate a major PCV2 genotype shift from the predominant PCV2 genotype 2b towards 2d. The aims of this study were to determine the ability of the commercial inactivated PCV2a vaccine Circovac® to protect pigs against exper ...
DNA; Porcine circovirus; Porcine reproductive and respiratory syndrome virus; antigens; models; swine; vaccination; vaccines; viremia; United States
Abstract:
... During 2012 and 2013, an apparent increase in porcine circovirus associated disease occurred in the USA. A variant PCV2b strain designated mPCV2b was recovered from many of these cases. This raised concerns of a decrease in efficacy of commercially available PCV2 vaccines. The objective of this study was to compare the ability of a commercial PCV2a-based vaccine and an experimental mPCV2b-based va ...
... Many racing authorities, sales companies and equestrian bodies have mandatory vaccination policies for equine influenza (EI). The consequences of lack of vaccine efficacy include clinical disease, disruption to training programmes, the cancellation of equestrian events and the introduction of virus to susceptible populations. The correlation between antibody against the virus haemagglutinin and pr ...
... Development of nasal immunization for human use is hindered by the lack of acceptable adjuvants. Although CT is an effective adjuvant, its toxicity will likely prevent its use in nasal vaccines. This study compared non-toxin adjuvants to CT for their ability to induce protective antibody responses with nasal immunization. C3H/HeN and C57BL/6 mice were immunized with rPA formulated with the followi ...
Ted M. Ross; Joshua DiNapoli; Maryann Giel-Moloney; Chalise E. Bloom; Kateri Bertran; Charles Balzli; Tod Strugnell; Mariana Sá e Silva; Teshome Mebatsion; Michel Bublot; David E. Swayne; Harry Kleanthous
... Since the first identification of the H5N1 Goose/Guangdong lineage in 1996, this highly pathogenic avian influenza virus has spread worldwide, becoming endemic in domestic poultry. Sporadic transmission to humans has raised concerns of a potential pandemic and underscores the need for a broad cross-protective influenza vaccine. Here, we tested our previously described methodology, termed Computati ...
Influenza A virus; amino acid sequences; antibodies; antigens; avian influenza; ferrets; human diseases; human population; mice; mortality; pandemic; vaccine development; virus-like particle vaccines; viruses
Abstract:
... Pandemic outbreaks of influenza are caused by the emergence of a pathogenic and transmissible virus to which the human population is immunologically naïve. Recent outbreaks of highly pathogenic avian influenza (HPAI) of the H5N1 subtype are of particular concern because of the high mortality rate (60% case fatality rate) and novel subtype. In order to develop a vaccine that elicits broadly reactiv ...
... A vaccine to prevent congenital cytomegalovirus (CMV) infections is a national priority. Investigational vaccines have targeted the viral glycoprotein B (gB) as an inducer of neutralizing antibodies and phosphoprotein 65 (pp65) as an inducer of cytotoxic T cells. Antibodies to gB neutralize CMV entry into all cell types but their potency is low compared to antibodies that block epithelial cell ent ...
M. Tameris; D.A. Hokey; V. Nduba; J. Sacarlal; F. Laher; G. Kiringa; K. Gondo; E.M. Lazarus; G.E. Gray; S. Nachman; H. Mahomed; K. Downing; B. Abel; T.J. Scriba; J.B. McClain; M.G. Pau; J. Hendriks; V. Dheenadhayalan; S. Ishmukhamedov; A.K.K. Luabeya; H. Geldenhuys; B. Shepherd; G. Blatner; V. Cardenas; R. Walker; W.A. Hanekom; J. Sadoff; M. Douoguih; L. Barker; M. Hatherill
... Several novel tuberculosis vaccines are currently in clinical trials, including AERAS-402, an adenovector encoding a fusion protein of Mycobacterium tuberculosis antigens 85A, 85B, and TB10.4. A multicentred trial of AERAS-402 safety and immunogenicity in healthy infants was conducted in three countries in sub-Saharan Africa, using an adaptive design.In a double-blind, randomised, placebo-controll ...
... Intranasal influenza vaccines may provide protective efficacy by inducing both systemic antibodies and local secretory IgA. Live attenuated intranasal vaccines are not feasible for high-risk groups. A previously constructed inactivated vaccine with adjuvant revealed an association with neurological events in some studies. In this phase II trial, we aimed to evaluate the safety and immunogenicity o ...
... GnRH immunogens have been extensively employed in immunocontraception of animals. While they are effective, they are not 100% efficacious and of limited duration. GnRH secretion is dependent on upstream stimulation by kisspeptin. We therefore hypothesised that a dual immunogen combining GnRH and kisspeptin may be more efficacious through targeting two levels of the axis. We have previously shown G ...
... Foot-and-mouth disease (FMD) is an acute, febrile, and highly contagious infectious disease common in cloven-hoofed animals. Outbreaks and epidemics of FMD can result in major economic losses of livestock. Using ferritin nanoparticles as the scaffold for an antigen can enhance the immunogenicity of the subunit vaccine and provide possible protection against FMD. We used a baculovirus expression sy ...
Mark S. Riddle; Milton Maciel; Chad K. Porter; Steven T. Poole; Ramiro L. Gutierrez; Robert Gormley; Renee M. Laird; Peter J. Sebeny; Kathleen E. Dori; Melissa E. Greenleaf; Fahmida Hoq; George W. Turiansky; Abel Jarell; Douglas Hawk; David Tribble; Stephen J. Savarino
... Enterotoxigenic Escherichia coli (ETEC) is a leading cause of diarrhea among travelers and pediatric populations worldwide. The tip-localized adhesin of colonization factor antigen (CFA)/I fimbriae was engineered as a donor strand complemented variant (dscCfaE) and delivered via transcutaneous immunization. Preclinical vaccine testing demonstrated safety, immunogenicity and efficacy. A series of o ...
Leyla Y. Bustamante; S. Josefin Bartholdson; Cecile Crosnier; Marta G. Campos; Madushi Wanaguru; Chea Nguon; Dominic P. Kwiatkowski; Gavin J. Wright; Julian C. Rayner
... The lack of an effective licensed vaccine remains one of the most significant gaps in the portfolio of tools being developed to eliminate Plasmodium falciparum malaria. Vaccines targeting erythrocyte invasion – an essential step for both parasite development and malaria pathogenesis – have faced the particular challenge of genetic diversity. Immunity-driven balancing selection pressure on parasite ...
Amalia Guadalupe Becerra Aquino; Maricruz Gutiérrez Brito; Carlos E. Aranza Doniz; Juan Francisco Galán Herrera; Mercedes Macias; Betzana Zambrano; Eric Plennevaux; Eduardo Santos-Lima
... OBJECTIVES: To evaluate an investigational, fully liquid hexavalent diphtheria-tetanus-acellular pertussis-inactivated poliovirus-hepatitis B-Haemophilus influenzae type b (DTaP-IPV-Hep B-PRP-T: Hexaxim™) vaccine for primary and booster vaccination of healthy children in Mexico. METHODS: Infants (N=1189) were randomized to receive one of three lots of the DTaP-IPV-Hep B-PRP-T vaccine or a licensed ...
... Newcastle disease (ND) is one of the most severe avian infectious disease inflicting a great loss on poultry industry worldwide. The control of ND relies on proper vaccination strategies. The vaccine strains of Newcastle disease virus (NDV) mainly belong to genotype I, II or III, which cannot fully prohibit virus shedding against the prevalent genotype VII virulent strain attack. To develop a safe ...
... The first safe and effective vaccine for the prevention of invasive meningococcal disease was created fifty years ago. The vaccine employed a novel platform, polysaccharide capsular antigen, based on the discovery that anticapsular antibody conferred protective immunity in humans. As with most new paradigms in vaccinology, it derived from important basic research from other scientific disciplines ...
... A replicon expression system based on the salmonid alphavirus (SAV) that encodes the infectious salmon anemia virus (ISAV) hemagglutinin-esterase (HE) was constructed and found to be an efficacious vaccine against infectious salmon anemia (ISA). Following a single intramuscular immunization, Atlantic salmon (Salmo salar) were effectively protected against subsequent ISAV challenge. Additional repl ...
... Newcastle disease virus (NDV) is an avian virus that is attenuated in primates and is a potential vaccine vector for human use. We evaluated NDV as a vector for expressing selected antigens of the Lyme disease pathogen Borrelia burgdorferi. A series of recombinant NDVs were generated that expressed intracellular or extracellular forms of two B. burgdorferi antigens: namely, the basic membrane prot ...
David W. Porter; Fiona M. Thompson; Tamara K. Berthoud; Claire L. Hutchings; Laura Andrews; Sumi Biswas; Ian Poulton; Eric Prieur; Simon Correa; Rosalind Rowland; Trudie Lang; Jackie Williams; Sarah C. Gilbert; Robert E. Sinden; Stephen Todryk; Adrian V.S. Hill
... We examined the safety, immunogenicity and efficacy of a prime-boost vaccination regime involving two poxvirus malaria subunit vaccines, FP9-PP and MVA-PP, expressing the same polyprotein consisting of six pre-erythrocytic antigens from Plasmodium falciparum. Following safety assessment of single doses, 15 volunteers received a heterologous prime-boost vaccination regime and underwent malaria spor ...
Kelsey A. Gregg; Erin Harberts; Francesca M. Gardner; Mark R. Pelletier; Corinne Cayatte; Li Yu; Michael P. McCarthy; Jason D. Marshall; Robert K. Ernst
... Vaccination can significantly reduce worldwide morbidity and mortality to infectious diseases, thereby reducing the health burden as a result of microbial infections. Effective vaccines contain three components: a delivery system, an antigenic component of the pathogen, and an adjuvant. With the growing use of purely recombinant or synthetic antigens, there is a need to develop novel adjuvants tha ...
... We previously developed an highly efficacious combination adjuvant comprised of innate defense regulator (IDR)-1002 peptide, poly(I:C) and polyphosphazene (TriAdj). Here we aimed to design and test the in vivo efficacy of a mucoadhesive nasal formulation of this adjuvant. To determine the physical properties of the formulation, the effect of addition of each individual component was characterised ...
Christopher C. Phelps; Stephen Vadia; Prosper N. Boyaka; Sanjay Varikuti; Zayed Attia; Purnima Dubey; Abhay R. Satoskar; Rodney Tweten; Stephanie Seveau
... Listeria monocytogenes is a facultative intracellular pathogen responsible for the life-threatening disease listeriosis. The pore-forming toxin listeriolysin O (LLO) is a critical virulence factor that plays a major role in the L. monocytogenes intracellular lifecycle and is indispensable for pathogenesis. LLO is also a dominant antigen for T cells involved in sterilizing immunity and it was propo ...
... Tiger puffer (Takifugu rubripes) is becoming an economic promising aquaculture species in China. However, the development of Tiger puffer breeding industry is restricted by some serious aquatic disease such as vibriosis. An effective live attenuated vaccine MVAV6203 was developed in our previous studies by curing the virulence plasmid pEIB1 and unmarked inframe-deletion of the aroC gene from the v ...
... Edwardsiella tarda and Vibrio anguillarum are the two main pathogenic bacteria that cause edwardsiellosis and vibriosis in various species of fish raised in aquaculture. In our previous study, the live attenuated vaccines E. tarda WED and V. anguillarum MVAV6203 showed robust relative protection when vaccinated zebrafish or turbot were challenged with virulent E. tarda or V. anguillarum, respectiv ...
... Meningococcal epidemics in Sub-Sahara caused by serogroup A strains are controlled by a group A polysaccharide conjugate vaccine. Strains with serogroups C, W and X continue to cause epidemics. Protein antigens in licensed serogroup B vaccines are shared among serogroup B and non-B strains.Compare serum bactericidal antibody responses elicited by an investigational native outer membrane vesicle va ...
Anton P.J. Middelberg; Tania Rivera-Hernandez; Nani Wibowo; Linda H.L. Lua; Yuanyuan Fan; Graham Magor; Cindy Chang; Yap P. Chuan; Michael F. Good; Michael R. Batzloff
... Studies on a platform technology able to deliver low-cost viral capsomeres and virus-like particles are described. The technology involves expression of the VP1 structural protein from murine polyomavirus (MuPyV) in Escherichia coli, followed by purification using scaleable units and optional cell-free VLP assembly. Two insertion sites on the surface of MuPyV VP1 are exploited for the presentation ...
... The eradication of poliovirus from the majority of the world has been achieved through the use of two vaccines: the inactivated poliovirus vaccine (IPV) and the live-attenuated oral poliovirus vaccine (OPV). Both vaccines are effective at preventing paralytic poliomyelitis, however, they also have significant differences. Most importantly for this work is the risk of revertant virus from OPV, the ...