Abstract 4292: In vitro kynurenine modulation by novel dual-acting and selective tryptophan 2,3-dioxygenase (TDO) and indoleamine 2,3-dioxygenase (IDO) inhibitors
Abstract:Introduction: TDO (tryptophan 2,3-dioxygenase) and IDO (indoleamine 2,3-dioxygenase) are structurally distinct enzymes that catalyse the oxidation of tryptophan (Trp) leading to local Trp depletion and formation of immunesuppressive kynurenine pathway (KP) metabolites and dampening of the immune response in the tumour environment. IDO is known to be up-regulated in numerous cancers. Recently, TDO was shown to be up-regulated in various tumour types. Hence, selective IDO inhibitors may have a limited effect in … Show more
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