Transduction of human dendritic cells with a recombinant modified vaccinia Ankara virus encoding MUC1 and IL-2

Katrina T. Trevor, Evan M. Hersh, Jacquie Brailey, Jean Marc Balloul, Bruce Acres

Research output: Contribution to journalArticle

40 Scopus citations

Abstract

The epithelial mucin MUC1 is considered an opportune target antigen for cancer immunotherapy, as it is over-expressed and exhibits aberrant glycosylation in malignant cells. Because dendritic cells (DC) are powerful initiators of immune responses, efforts have focused on tumor antigen-bearing DC as potent cancer vaccines. In this study we have characterized the transduction of monocyte-derived DC with a highly attenuated vaccinia virus vector [modified vaccinia Ankara (MVA)] encoding human MUC1 and the immunostimulatory cytokine IL-2. Analysis of transduced DC cultures generated from a number of donors revealed MUC1 expression in the range of 27-54% of the cells and a co-regulated secretion of bioactive IL-2. As shown by FACS analysis with MUC1-specific antibodies, the MVA-MUC1/IL-2-transduced DC predominantly expressed the fully processed glycoform of MUC1, typical of that displayed by normal epithelia. Over a 3-day period after transduction, transgene expression declined concurrent with an increase in MVA-induced cytopathic effects. The transduced DC stimulated allogeneic lymphocyte proliferation, indicating that DC immunostimulatory function is not impaired by vector transduction. In the presence of IL-2, MVA-transduced DC were able to enhance autologous lymphocyte proliferation. Also, vector expression was analyzed in DC cultures treated with TNF-α, a known DC maturation factor. As indicated by the up-regulation of several DC maturation markers, neither virus infection nor transgene expression influenced the maturation capacity of the cells. The MVA-MUC1/IL-2 vector effectively transduced both immature and TNF-α-matured DC. Overall, our results are encouraging for the clinical application of MVA-MUC1/IL-2-transduced DC.

Original languageEnglish (US)
Pages (from-to)397-407
Number of pages11
JournalCancer Immunology, Immunotherapy
Volume50
Issue number8
DOIs
StatePublished - 2001

Keywords

  • Dendritic cells
  • IL-2
  • Immunotherapy
  • MUC1
  • Modified vaccinia Ankara

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology
  • Oncology
  • Cancer Research

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