IDO expression by dendritic cells: Tolerance and tryptophan catabolism
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作者:
Mellor, AL
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机构:
Med Coll Georgia, Dept Med, Inst Mol Med & Genet, Program Mol Immunol, Augusta, GA 30912 USAMed Coll Georgia, Dept Med, Inst Mol Med & Genet, Program Mol Immunol, Augusta, GA 30912 USA
Mellor, AL
[1
]
Munn, DH
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机构:Med Coll Georgia, Dept Med, Inst Mol Med & Genet, Program Mol Immunol, Augusta, GA 30912 USA
Munn, DH
机构:
[1] Med Coll Georgia, Dept Med, Inst Mol Med & Genet, Program Mol Immunol, Augusta, GA 30912 USA
[2] Med Coll Georgia, Dept Pediat, Inst Mol Med & Genet, Program Mol Immunol, Augusta, GA 30912 USA
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.