Open AccessComparative evaluation of therapeutic DNA vaccines against Trypanosoma cruzi in mice
Author(s) -
SanchezBurgos Gilma,
MezquitaVega R. Gabino,
EscobedoOrtegon Javier,
RamirezSierra Maria Jesus,
ArjonaTorres Arletty,
Ouaissi Ali,
Rodrigues Mauricio M.,
Dumonteil Eric
Publication year - 2007
Publication title -
fems immunology & medical microbiology
Language(s) - English
Resource type - Journals
eISSN - 1574-695X
pISSN - 0928-8244
DOI - 10.1111/j.1574-695x.2007.00251.x
Subject(s) - parasitemia , trypanosoma cruzi , chagas disease , biology , dna vaccination , plasmid , virology , antigen , immunology , myocarditis , trypanosomiasis , microbiology and biotechnology , parasite hosting , dna , malaria , plasmodium falciparum , medicine , immunization , genetics , world wide web , computer science
Chagas disease, caused by the protozoan parasite Trypanosoma cruzi , is a major public health problem in most of Latin America. A key priority is the development of new treatments, due to the poor efficacy of current ones. We report here the comparative evaluation of therapeutic DNA vaccines encoding various T. cruzi antigens. ICR mice infected with 500 parasites intraperitoneally were treated at 5 and 12 days postinfection with 20 μg of plasmid DNA encoding T. cruzi antigens TSA‐1, TS, ASP‐2‐like, Tc52 or Tc24. Treatment with plasmid encoding TS and/or ASP‐2‐like antigens had no significant effect on parasitemia or survival. Treatment with Tc52 DNA significantly reduced parasitemia, as well as cardiac parasite burden, and improved survival, although myocarditis was not significantly affected. Finally, treatment with plasmids encoding Tc24 and TSA‐1 induced the most complete control of disease as evidenced by significant reductions in parasitemia, mortality, myocarditis and heart parasite burden. These data demonstrate that therapeutic vaccine efficacy is dependent on the antigen and suggest that DNA vaccines encoding Tc24, TSA‐1, and Tc52 represent the best candidates for further studies of a therapeutic vaccine against Chagas disease.