Inhibition of Melanoma Growth by Targeting of Antigen to Dendritic Cells via an Anti-DEC-205 Single-Chain Fragment Variable Molecule

Theron S. Johnson*, Karsten Mahnke, Volker Storn, Kurt Schoenfeld, Sabine Ring, Dirk M. Nettelbeck, Hidde J. Haisma, Fabrice Le Gall, Roland E. Kontermann, Alexander H. Enk

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

53 Citations (Scopus)


Purpose: Our goal was to target melanoma antigens to the dendritic cell-specific receptor DEC-205. DEC-205 is an antigen receptor expressed on dendritic cells and has been shown to guide antigens to MHC class I and II compartments for processing and presentation to T cells.

Experimental Design: The melanoma tumor-associated antigen (TAA), gp100, was fused to the single-chain fragment variable (scFv) specific for DEC-205. The binding capacity of the scFv was tested on lymph node-isolated CD11c(+) cells. Mixed lymphocyte reactions were carried out to show an increased proliferative capacity of gp100 antigen-specific CD4 and CD8 T cells. Furthermore the scFv-TAA was used in a therapeutic setting using two different melanoma mouse models.

Results: C57BI/6 mice were injected with scFv-DEC-205-gp100, monoclonal antibody anti-DEC-205, or PBS. Using fluorescence-activated cell sorting, we showed that lymph node CD11c+ dendritic cells stained positive for the binding of the scFv-mDEC-205-gp100 and the anti-DEC-205 monoclonal antibody, whereas the PBS-injected animals were negative. In mixed lymphocyte reactions, bone marrow-derived dendritic cells pulsed with scFv-mDEC-205-gp100 significantly increased proliferation of gp100-specific CD8(+) and CD4(+) T cells beyond gp100 peptide-pulsed or nonpulsed bone marrow-derived dendritic cells. Finally, in B16/F10 and RET models, a concentration-dependent suppression of tumor growth using scFv-mDEC-205-gp100 (66% reduction of tumor volume), in comparison with gp100 peptide vaccination, was observed.

Conclusions: Our results indicate that the scFv-mDEC-205-gp100 targets TAA to dendritic cells in vivo for presentation on both MHC class I and II molecules. In vivo, this leads to an improved immune response and a decrease in tumor growth rate.

Original languageEnglish
Pages (from-to)8169-8177
Number of pages9
JournalClinical Cancer Research
Issue number24
Publication statusPublished - 15-Dec-2008


  • DEC-205
  • DNA

Cite this