Spontaneous Cytotoxic T-Cell Reactivity against Indoleamine 2,3-Dioxygenase-2

Spontaneous cytotoxic T-Cell reactivity against indoleamine 2,3-dioxygenase-2.

Several lines of data have suggested a possible link between the indoleamine 2,3-dioxygenase (IDO)-like protein IDO2 and cancer. First, IDO2 expression has been described in human tumors, including renal, gastric, colon, and pancreatic tumors. Second, the apparent selective inhibition of IDO2 by the D stereoisomer of the IDO blocker 1-methyl-tryptophan (1MT), which tends to be more active than ...

Natural CD4+ T-Cell Responses against Indoleamine 2,3-Dioxygenase

BACKGROUND The enzyme indoleamine 2,3-dioxygenase (IDO) contributes to immune tolerance in a variety of settings. In cancer IDO is expressed within the tumor itself as well as in antigen-presenting cells in tumor-draining lymph nodes, where it endorses the establishment of peripheral immune tolerance to tumor antigens. Recently, we described cytotoxic CD8(+) T-cell reactivity towards IDO-derive...

Indoleamine 2,3-dioxygenase specific, cytotoxic T cells as immune regulators.

Indoleamine 2,3-dioxygenase (IDO) is an immunoregulatory enzyme that is implicated in suppressing T-cell immunity in normal and pathologic settings. Here, we describe that spontaneous cytotoxic T-cell reactivity against IDO exists not only in patients with cancer but also in healthy persons. We show that the presence of such IDO-specific CD8(+) T cells boosted T-cell immunity against viral or t...

IDO 2 ( indoleamine 2 , 3 - dioxygenase 2 )

Indoleamine 2,3-Dioxygenase Mediates Cell