| Literature DB >> 16814355 |
Kanakatte Raviprakash1, Doris Apt, Alice Brinkman, Craig Skinner, Shumin Yang, Glenn Dawes, Dan Ewing, Shuenn-Jue Wu, Steve Bass, Juha Punnonen, Kevin Porter.
Abstract
DNA shuffling and screening technologies were used to produce chimeric DNA constructs expressing antigens that shared epitopes from all four dengue serotypes. Three shuffled constructs (sA, sB and sC) were evaluated in the rhesus macaque model. Constructs sA and sC expressed pre-membrane and envelope genes, whereas construct sB expressed only the ectodomain of envelope protein. Five of six, and four of six animals vaccinated with sA and sC, respectively, developed antibodies that neutralized all 4 dengue serotypes in vitro. Four of six animals vaccinated with construct sB developed neutralizing antibodies against 3 serotypes (den-1, -2 and -3). When challenged with live dengue-1 or dengue-2 virus, partial protection against dengue-1 was observed. These results demonstrate the utility of DNA shuffling as an attractive tool to create tetravalent chimeric dengue DNA vaccine constructs, as well as a need to find ways to improve the immune responses elicited by DNA vaccines in general.Entities:
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Year: 2006 PMID： 16814355 DOI： 10.1016/j.virol.2006.05.005
Source DB: PubMed Journal: Virology ISSN： 0042-6822 Impact factor: 3.616