Schizosaccharomyces pombe: a novel transport vehicle of functional DNA and mRNA into mammalian antigen-presenting cells.

Vaccine vehicles based on recombinant yeasts have become promising candidates for the induction of cellular immune responses. In this study, we investigated the capacity of the fission yeast Sz. pombe for the delivery of functional nucleic acids into murine and human antigen-presenting cells. We demonstrate that Sz. pombe cells effectively induce maturation of human dendritic cells (DC), an important prerequisite for T-cell activation. Further, recombinant fission yeast efficiently delivers functional DNA and mRNA into murine macrophages and human DC resulting in the expression of the model antigen eGFP in these cells. Thus, Sz. pombe suggests itself as a promising candidate for a novel live vaccine.