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Ebola virus (EBOV) is one of the most virulent pathogens known to humans. Neutralizing antibodies play a major role in the protection against EBOV infections. Thus, an EBOV vaccine capable of inducing a long-lasting neutralizing antibody response is highly desirable. We report here that a heterologous prime-boost vaccine regimen can elicit durable EBOV-neutralizing antibody response in mice. A chimpanzee...
Recombinant adenoviral vector (rAd)-based vaccines are currently being developed for several infectious diseases and cancer therapy, but pre-existing seroprevalence to such vectors may prevent their use in broad human populations. In this study, we investigated the potential of low seroprevalence non-human primate rAd vectors to stimulate cellular and humoral responses using HIV/SIV Env glycoprotein...
The systemic toxicity of three candidate HIV-1 vaccines plasmid pSG2.HIVconsv DNA (D), ChAdV63.HIVconsv (C) and MVA.HIVconsv (M) expressing chimeric immunogen derived from the most conserved regions of the HIV-1 proteome was evaluated in two repeat-dose studies in the male and female BALB/c mice.In study UNO011, mice received three doses of 2×10 7 plaque-forming units of MVA.HIVconsv vaccine...
The popularity of nonreplicating adenoviruses of chimpanzee origin (ChAdVs) as vectors for subunit vaccines is on the rise. This is mainly for their excellent safety and impressive immunogenicity observed in human studies to date. Here, we recloned the chimpanzee adenovirus sero type 68 (ChAdV‐68), also designated SAdV‐25 and AdC68, genome and demonstrated its straightforward genetic manipulation...
Pre-existing immunity to human adenovirus serotype 5 (AdHu5) has been shown to suppress the immunogenicity of recombinant Ad5 (rAdHu5) vector-based vaccines for human immunodeficiency virus type 1 (HIV-1) in both preclinical studies and clinical trials. As a potential solution to this problem we developed adenovirus vaccine vectors of chimpanzee origin. In the present study we assessed the immunogenicity...
The development of adenoviral vectors based on non-human serotypes such as the chimpanzee adenovirus simian adenovirus 24 (AdC7) may allow for their utilization in populations harboring neutralizing antibodies to common human serotypes. Because adenoviral vectors can be used to generate potent T cell responses, they may be useful as vaccines against pandemic influenza such as may be caused by the...
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