'Educated' dendritic cells act as messengers from memory to naive T helper cells - PubMed

Affiliations

• PMID: 15156140
• DOI: 10.1038/ni1077

'Educated' dendritic cells act as messengers from memory to naive T helper cells

Oral Alpan et al. Nat Immunol. 2004 Jun.

Abstract

Ingested antigens lead to the generation of effector T cells that secrete interleukin 4 (IL-4) rather than interferon-gamma (IFN-gamma) and are capable of influencing naive T cells in their immediate environment to do the same. Using chimeric mice generated by aggregation of two genotypically different embryos, we found that the conversion of a naive T cell occurs only if it can interact with the same antigen-presenting cell, although not necessarily the same antigen, as the effector T cell. Using a two-step culture system in vitro, we found that antigen-presenting dendritic cells can act as 'temporal bridges' to relay information from orally immunized memory CD4 T cells to naive CD4 T cells. The orally immunized T cells use IL-4 and IL-10 (but not CD40 ligand) to 'educate' dendritic cells, which in turn induce naive T cells to produce the same cytokines as those produced by the orally immunized memory T cells.

Comment in

• Dendritic cells: the immune information management experts.

  Mosmann TR, Livingstone AM. Mosmann TR, et al. Nat Immunol. 2004 Jun;5(6):564-6. doi: 10.1038/ni0604-564. Nat Immunol. 2004. PMID: 15164014 No abstract available.

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