Larger numbers of immature dendritic cells augment an anti-tumor effect against established murine melanoma cells

Tae Hyung Lee, Young Hun Cho, Min Geol Lee

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

The dendritic cell (DC) is a potentially promising tool for cancer immunotherapy. To date, however, DC-based immunotherapy has not yielded data with which firm conclusions can be drawn. In the present study, we tested the dose-dependant enhancement of the anti-tumor effect induced by DCs. When large numbers of DCs were used, tumor growth was suppressed up to 41% when compared to control mice. Survival of the animals was prolonged to 54 days compared to the 33-day survival the control mice. The delayed-type hypersensitivity (DTH) response induced was 26-fold higher than in the controls. Larger numbers of DCs also led to higher expansion of IFN-γ-secreting-CD8+ T cells. Furthermore, the secretion of IL-12p70 and IFN-γ by spleen cells were enhanced in proportion to the dosage. However, the level of IL-4 secreted from spleen cells was negligible compared to the level of IFN-γ that was released. These results indicate that DCs induce Th1-dominant immune response and that more DCs could lead to better immunological results, a finding which was consistent with our therapeutic results.

Original languageEnglish
Pages (from-to)351-357
Number of pages7
JournalBiotechnology Letters
Volume29
Issue number3
DOIs
Publication statusPublished - 2007 Mar

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

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