Elsevier

Vaccine

Volume 28, Issue 29, 23 June 2010, Pages 4644-4652
Vaccine

Immunogenicity and protective efficacy of a recombinant yellow fever vaccine against the murine malarial parasite Plasmodium yoelii

https://doi.org/10.1016/j.vaccine.2010.04.071Get rights and content

Abstract

The live-attenuated yellow fever vaccine (YF17D) is one of the safest and most effective vaccines available today. Here, YF17D was genetically altered to express the circumsporozoite protein (CSP) from the murine malarial parasite Plasmodium yoelii. Reconstituted recombinant virus was viable and exhibited robust CSP expression. Immunization of naïve mice resulted in extensive proliferation of adoptively transferred CSP-specific transgenic CD8+ T-cells. A single immunization of naïve mice with recombinant YF17D resulted in robust production of IFN-γ by CD8+ T-cells and IFN-γ and IL-2 by CD4+ T-cells. A prime-boost regimen consisting of recombinant virus followed by a low-dose of irradiated sporozoites conferred protection against challenge with P. yoelii. Taken together, these results show that recombinant YF17D can efficiently express CSP in culture, and prime a protective immune response in vivo.

Keywords

YF17D
Malaria
Protection

Cited by (0)

1

Current address: Departamento de Parasitologia, Instituto de Ciências Biomédicas, Universidade de São Paulo, São Paulo 05508-900, Brazil.

2

Current address: Laboratory of Structural Virology, Institut Pasteur, 75015 Paris, France.

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