Dendritic cells (DC) are widely accepted as the most potent antigen-pr
esenting cells (APC), and considerable interest has been generated in
their potential for the immunological therapy of cancer and infectious
disease. Recently, however, a broader understanding of the phenotypic
diversity and functional heterogeneity of DC has been acquired. Thus,
in addition to having a role in central regarded as potential modulat
ors of peripheral immune responses. h to the immunosuppressive therapy
of allograft Harnessing this potential may offer a new approach rejec
tion or autoimmunity. Here. the concept of tolerogenic DC is placed in
the context of rapidly accumulating new evidence of the diverse prope
rties of these important APC.