Autocrine IL-12 is involved in dendritic cell modulation via CD40 ligation.

Ligation of CD40 on dendritic cells (DC) triggers production of IL-12. Using an adoptive transfer model we have previously shown that rIL-12 acts directly on DC to enhance presentation of an otherwise poorly immunogenic tumor peptide. Using the same experimental model, we now describe a similar adjuvanticity of CD40 ligation on peptide presentation by DC. We also explore the possibility that the IL-12 resulting from CD40 ligation directly affects the APC function of DC, mediating or contributing to the adjuvant effect of CD40 ligation. CD40 engagement in vitro and rIL-12 at concentrations in the range induced by CD40 ligation were equally effective in priming DC for presentation of the tumor peptide in vivo. Remarkably, the copresence in vitro of neutralizing Ab to IL-12, but not to TNF-alpha, IL-1beta, or IFN-gamma, ablated the enhancing effect of CD40 engagement on the APC function of DC. These data suggest a major role for autocrine IL-12 in DC modulation via CD40 ligation.

• Publication year

  1999

• Venue

  Journal of Immunology

• Publication date

  1999-09-01

• Fields of study

  Biology, Medicine

• Identifiers
  DOI 10.4049/jimmunol.163.5.2517PMID 10452988
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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