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Human botulism is commonly associated with botulinum neurotoxin (BoNT) serotypes A, B, E and F. This suggests that the greatest need is for a tetravalent vaccine that provides protection against all four of these serotypes. In current study, we investigated the feasibility of generating several tetravalent vaccines that protected mice against the four serotypes. Firstly, monovalent replicon vaccine...
Tuberculosis remains a major infectious disease worldwide due to the low efficacy of available vaccine of the Mycobacterium bovis Bacillus Calmette–Guérin (BCG). DNA vaccines are especially promising candidates; however, the efficacy of DNA vaccine expressing single antigen of Mycobacterium tuberculosis (MTb) is limited. In this study, a plasmid DNA vaccine, pAEH, was constructed and designed to express...
The receptor-binding domain of tetanus toxin (THc), which mediates the binding of the toxin to the nerve cells, is a candidate subunit vaccine against tetanus. In this study one synthetic gene encoding the THc was constructed and highly expressed in Escherichia coli by co-expression with thioredoxin (Trx). The purified THc-vaccinated mice were completely protected against an active toxin challenge...
Here, DNA replicon vaccines encoding the Hc domain of botulinum neurotoxin serotype A (AHc) or the receptor binding domain of anthrax protective antigen (PA4) with or without signal sequences were evaluated in mice. Strong antibody and protective responses were elicited only from AHc DNA vaccines with an Ig κ signal sequence or tissue plasminogen activator signal sequence. Meanwhile, there were no...
Vaccination with recombinant His-tagged isoforms of the Clostridium botulinum Hc domain of neurotoxin serotype A (rAHc) have effectively protected against challenge with active botulinum neurotoxin serotype A. To establish a formulation suitable for human use, rAHc was expressed in Escherichia coli without a His-tag and purified by sequential chromatography on ion-exchange and hydrophobic-interaction...
In current study, the immunogenicity of a plasmid DNA replicon vaccine (pSCARSHc) encoding the Hc domain of Clostridium botulinum neurotoxin serotype A (AHc) was investigated and compared with a conventional plasmid DNA vaccine (pcDNASHc) encoding the same antigen. In vitro, pSCARSHc incorporating Semliki Forest virus (SFV) replicon could express AHc protein and induce apoptosis of transfected cells...
Epitope LKVIRK on 47kDa of heat shock protein (Hsp) 90 of Candida albicans, corresponding to residues 386–391 of the Hsp90, is recognized by patients recovering from invasive candidiasis. The efficacy of hybrid phage displaying epitope LKVIRK in the N-terminal region of the major coat protein (pVIII) in inducing anti-invasive candidiasis immune response was studied in C57BL/6 mice. Indirect phage-ELISA...
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