DNA vaccination with linear minimalistic (MIDGE) vectors confers protection against Leishmania major infection in mice.

Abstract:

:Immunization protocols based on priming with plasmid DNA and boosting with recombinants of vaccinia virus (rVV) encoding the same antigen offer great promise for the prevention and treatment of many parasitic and viral infections for which conventional vaccination has little or no effect. To overcome some of the potential problems associated to the use of plasmids, we have developed minimalistic, immunogenically defined, gene expression (MIDGE((R))) vectors. These linear vectors contain only the minimum sequence required for gene expression and can be chemically modified to increase the immune response. Here, we demonstrate that MIDGE vectors coding for the LACK antigen confer a highly effective protection against Leishmania infection in susceptible Balb/c mice. Protection is achieved at lower doses of vector compared to conventional plasmids. This efficacy could be greatly improved by the addition of a nuclear localization signal (NLS) peptide to the end of the MIDGE vector. In fact, immunization with two doses of NLS-modified MIDGE conferred similar or even better protection than that achieved by priming with plasmid DNA followed by boosting with rVV. These results demonstrate that MIDGE vectors are a good alternative to plasmid and rVV for immunization.

journal_name

Vaccine

journal_title

Vaccine

authors

López-Fuertes L,Pérez-Jiménez E,Vila-Coro AJ,Sack F,Moreno S,Konig SA,Junghans C,Wittig B,Timón M,Esteban M

doi

10.1016/s0264-410x(02)00450-4

subject

Has Abstract

pub_date

2002-12-13 00:00:00

pages

247-57

issue

3-4

eissn

0264-410X

issn

1873-2518

pii

S0264410X02004504

journal_volume

21

pub_type

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