1. Signaling Pathways
  2. Metabolic Enzyme/Protease
  3. Indoleamine 2,3-Dioxygenase (IDO)

Indoleamine 2,3-Dioxygenase (IDO)

Indoleamine 2, 3-dioxygenase (IDO) is an inflammatory cytokine-inducible rate-limiting enzyme of the tryptophan (Trp) catabolism, which is involved in the inhibition of intracellular pathogen replication as well as in immunomodulation. To date, three types of tryptophan-metabolizing enzymes have been identified: IDO1, IDO2 and tryptophan 2,3-dioxygenase 2.

IDO is an intracellular enzyme that is constitutively expressed in several human and mouse cells. Being present in innate immune cells, such as Mos and dendritic cells (DCs), IDO catalyzes the initial rate-limiting step of tryptophan (Trp) catabolism, thus leading to the production of immunoregulatory catabolites (collectively known as kynurenines).

The IDO gene promoter contains multiple sequence elements that confer responsiveness to proinflammatory mediators, thereby demonstrating the strong correlation between inflammation and induced IDO expression.

Indoleamine 2,3-Dioxygenase (IDO) Isoform Specific Products:

  • IDO1

  • IDO2

  • IDO

Indoleamine 2,3-Dioxygenase (IDO) Related Products (41):

Cat. No. Product Name Effect Purity
  • HY-15760
    Necrostatin-1 Inhibitor 99.87%
    Necrostatin-1 (Nec-1) is a potent necroptosis inhibitor with an EC50 of 490 nM in Jurkat cells. Necrostatin-1 inhibits RIP1 kinase (EC50=182 nM). Necrostatin-1 is also an IDO inhibitor.
  • HY-15689
    Epacadostat Inhibitor 99.66%
    Epacadostat (INCB 024360) is a potent and selective indoleamine 2,3-dioxigenase 1 (IDO1) inhibitor with an IC50 of 71.8 nM.
  • HY-16724
    Indoximod Inhibitor ≥98.0%
    Indoximod (1-Methyl-D-tryptophan; NLG-8189) is an indoleamine 2,3-dioxygenase (IDO) pathway inhibitor with a Ki of 19 μM.
  • HY-101560
    Linrodostat Inhibitor 99.92%
    Linrodostat (BMS-986205) is a selective and irreversible indoleamine 2,3-dioxygenase 1 (IDO1) inhibitor with an IC50 value of 1.1 nM in IDO1-HEK293 cells. Linrodostat is well tolerated with potent pharmacodynamic activity in advanced cancers.
  • HY-N0110
    Palmatine chloride Inhibitor
    Palmatine chloride is an orally active and irreversible indoleamine 2,3-dioxygenase 1 (IDO-1) inhibitor. Palmatine chloride can ameliorate DSS-induced colitis by mitigating colonic injury, preventing gut microbiota dysbiosis, and regulating tryptophan catabolism. Palmatine has the potential for colitis treatment.
  • HY-139204
    BMS-986242 Inhibitor
    BMS-986242 is an orally active, potent and selective indoleamine-2,3-dioxygenase 1 (IDO1) inhibitor. BMS-986242 can be used for the research of cancer.
  • HY-139205
    BMT-297376 Inhibitor
    BMT-297376, the optimized Linrodostat, is a potent IDO1 inhibitor.
  • HY-13983
    IDO-IN-7 Inhibitor 99.87%
    IDO-IN-7 (NLG-919 analogue) is a a potent IDO1 inhibitor with an IC50 of 38 nM.
  • HY-18770B
    Navoximod Inhibitor 99.99%
    Navoximod (GDC-0919; NLG-​919) is a potent IDO (indoleamine-(2,3)-dioxygenase) pathway inhibitor with Ki/EC50 of 7 nM/75 nM.
  • HY-101111
    PF-06840003 Inhibitor 99.79%
    PF-06840003 (EOS200271) is a highly selective orally bioavailable IDO-1 inhibitor with IC50s of 0.41 μM, 0.59 μM, and 1.5 μM for hIDO-1, dIDO-1, and mIDO-1, respectively.
  • HY-N0707
    (S)-Indoximod Inhibitor 99.03%
    (S)-Indoximod (1-Methyl-L-tryptophan) is an inhibitor of indoleamine 2,3-dioxygenase (IDO). (S)-Indoximod can be used for the research of cancer.
  • HY-100687
    GNF-PF-3777 Inhibitor
    GNF-PF-3777 (8-Nitrotryptanthrin) is a potent human indoleamine 2,3-dioxygenase 2 (hIDO2) inhibitor which significantly reduces IDO2 activity with Ki of 0.97 μM.
  • HY-111540
    IDO1-IN-5 Inhibitor 98.58%
    IDO1-IN-5 is a potent, selective and brain penetrated inhibitor of IDO1 activity, binds to apo-IDO1 lacking heme rather than mature heme-bound IDO1.
  • HY-N0736
    Coptisine chloride Inhibitor 98.0%
    Coptisine chloride is an alkaloid from Chinese goldthread, and acts as an efficient uncompetitive IDO inhibitor with a Ki value of 5.8 μM and an IC50 value of 6.3 μM. Coptisine chloride is a potent H1N1 neuraminidase (NA-1) inhibitor with an IC50 of 104.6 μg/mL and can be used for influenza A (H1N1) infection.
  • HY-100771
    PCC0208009 Inhibitor 99.65%
    PCC0208009 is a potent IDO inhibitor with an IC50 value of 4.52 nM in HeLa cell. PCC0208009 alleviates neuropathic pain and comorbidities by regulating synaptic plasticity of anterior cingulate cortex (ACC) and amygdala .
  • HY-15683
    IDO5L Inhibitor 99.89%
    IDO5L is a potent indoleamine 2,3-dioxygenase (IDO) inhibitor with an IC50 of 67 nM.
  • HY-112164
    IACS-8968 Inhibitor 98.29%
    IACS-8968 (IDO/TDO Inhibitor) is a dual IDO and TDO inhibitor, with pIC50s of 6.43 for IDO and <5 for TDO, respectively.
  • HY-133897
    (Rac)-Indoximod Inhibitor 98.13%
    (Rac)-Indoximod (1-Methyl-DL-tryptophan) is an indoleamine 2,3-dioxygenase (IDO) inhibitor. Co-treatment with IFN-γ and (Rac)-Indoximod markedly reduces the activity of human cardiac myofibroblasts (hCMs) expressing α-SMA and induces apoptosis through up-regulating the IRF-1, Fas, and FasL genes.
  • HY-111540A
    (Rac)-IDO1-IN-5 Inhibitor 99.12%
    (Rac)-IDO1-IN-5 (Example 1) is a racemate of IDO1-IN-5. IDO1-IN-5 is a potent, selective and brain penetrated inhibitor of Indoleamine 2,3-Dioxygenase 1 (IDO1) activity, binds to apo-IDO1 lacking heme rather than mature heme-bound IDO1.
  • HY-16987
    IDO-IN-3 Inhibitor 99.88%
    IDO-IN-3 is a potent indoleamine 2,3-dioxygenase (IDO) inhibitor with an IC50 of 290 nM.
Isoform Specific Products

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