Enhanced T-cell immunogenicity of plasmid DNA vaccines boosted by recombinant modified vaccinia virus Ankara in humans - PubMed (original) (raw)

Clinical Trial

doi: 10.1038/nm881. Epub 2003 May 25.

William H H Reece, Vasee S Moorthy, Daniel Webster, Susanna Dunachie, Geoff Butcher, Jenni M Vuola, Tom J Blanchard, Philip Gothard, Kate Watkins, Carolyn M Hannan, Simone Everaere, Karen Brown, Kent E Kester, James Cummings, Jackie Williams, D Gray Heppner, Ansar Pathan, Katie Flanagan, Nirmalan Arulanantham, Mark T M Roberts, Michael Roy, Geoffrey L Smith, Joerg Schneider, Tim Peto, Robert E Sinden, Sarah C Gilbert, Adrian V S Hill

Affiliations

Clinical Trial

Enhanced T-cell immunogenicity of plasmid DNA vaccines boosted by recombinant modified vaccinia virus Ankara in humans

Samuel J McConkey et al. Nat Med. 2003 Jun.

Abstract

In animals, effective immune responses against malignancies and against several infectious pathogens, including malaria, are mediated by T cells. Here we show that a heterologous prime-boost vaccination regime of DNA either intramuscularly or epidermally, followed by intradermal recombinant modified vaccinia virus Ankara (MVA), induces high frequencies of interferon (IFN)-gamma-secreting, antigen-specific T-cell responses in humans to a pre-erythrocytic malaria antigen, thrombospondin-related adhesion protein (TRAP). These responses are five- to tenfold higher than the T-cell responses induced by the DNA vaccine or recombinant MVA vaccine alone, and produce partial protection manifest as delayed parasitemia after sporozoite challenge with a different strain of Plasmodium falciparum. Such heterologous prime-boost immunization approaches may provide a basis for preventative and therapeutic vaccination in humans.

PubMed Disclaimer

Comment in

Similar articles

Cited by

Publication types

MeSH terms

Substances

LinkOut - more resources