IDO expression by dendritic cells: Tolerance and tryptophan catabolism

Andrew L. Mellor, David H. Munn

Research output: Contribution to journalReview article

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Indoleamine 2,3-dioxygenase (IDO) is an enzyme that degrades the essential amino acid tryptophan. The concept that cells expressing IDO can suppress T-cell responses and promote tolerance is a relatively new paradigm in immunology. Considerable evidence now supports this hypothesis, including studies of mammalian pregnancy, tumour resistance, chronic infections and autoimmune diseases. In this review, we summarize key recent developments and propose a unifying model for the role of IDO in tolerance induction.

Original languageEnglish (US)
Pages (from-to)762-774
Number of pages13
JournalNature Reviews Immunology
Issue number10
Publication statusPublished - Oct 1 2004


Cite this

IDO expression by dendritic cells : Tolerance and tryptophan catabolism. / Mellor, Andrew L.; Munn, David H.

In: Nature Reviews Immunology, Vol. 4, No. 10, 01.10.2004, p. 762-774.

Research output: Contribution to journalReview article