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Antibodies recognizing conformational epitopes in Pfs48/45, an antigen expressed on the surface of Plasmodium falciparum gametes and zygotes, have firmly established Pfs48/45 as a promising transmission blocking vaccine (TBV) candidate. However, it has been difficult to reproducibly express Pfs48/45 in a variety of recombinant expression systems. The goal of our studies was to evaluate functional...
V3526, a genetically modified strain of Venezuelan equine encephalitis virus (VEEV), was formalin inactivated for evaluation as a next generation vaccine candidate for VEEV. In this study, we tested formalin-inactivated V3526 (fV3526) with and without adjuvant for immunogenicity and efficacy in BALB/c mice and results were compared to the existing inactivated VEEV vaccine, C84. Mice were vaccinated...
We recently developed a gamma-irradiation method to inactivate V3526, a live-attenuated Venezuelan equine encephalitis virus (VEEV) vaccine candidate. Dosage and schedule studies were conducted to evaluate the immunogenicity and efficacy of gamma-irradiated V3526 (gV3526). Subcutaneous (SC) and low dosage intramuscular (IM) administration of gV3526 were highly effective in protecting mice against...
Non-human primates (NHP) are considered to be the most appropriate model for predicting how humans will respond to many infectious diseases. Due to ethical and monetary concerns associated with the use of NHP, rodent models that are as predictive of responses likely to be seen in human vaccine recipients are warranted. Using implanted telemetry devices, body temperature and activity were monitored...
In this Phase I study, immunisation with the yeast-derived p24 virus-like particles Ty p24-VLP (3 100 or 3 500 μg subcutaneously) in 16 healthy male subjects elicited p24 antibody responses in 4 of 16 (25%) subjects. After a fourth, intramuscular, immunisation (500 μg), p24 antibody responses were detected in 11 of 15 (70%) subjects. In addition to p24 antibody responses, T cell proliferative...
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