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Plasmodium falciparum Antigen Expression in Leishmania Parasite: A Way Forward for Live Attenuated Vaccine Development. | LitMetric
Live attenuated vaccines (LAVs) are among the most critical interventions in modern medicine and have already proven their potential to save millions of lives. LAVs are always explored as potential vaccine candidates since they induce an immune response, which is as good as the wild type pathogen. For parasitic diseases, the efficacy of LAVs is still under investigation and needs extensive research to mark their presence in the field. In malaria, live attenuated sporozoites have been evaluated for a vaccine against the liver stage. This vaccine approach is limited due to the highly cumbersome technique of sporozoite isolation and related relapse issues. We have developed a novel vaccine against malaria by expressing Plasmodium falciparum antigens in Leishmania donovani promastigotes. These hybrid, recombinant L. donovani parasites mimicking P. falciparum parasite antigens were analyzed for their anti-malarial efficacy in preclinical studies. We demonstrate the potential of Leishmania spp. parasites in developing an important live vector vaccine against malaria for the induction of protective immune responses. Herein, we describe a method to express malaria parasite antigens in L. donovani promastigotes and analyze its potential for a vaccine against malaria. This methodology can be extended to live, attenuated Leishmania promastigotes parasites to develop LAV against malaria.
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