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.

Cat. No. Product Name Effect Purity Chemical Structure
  • HY-15760
    Necrostatin-1
    Inhibitor 99.89%
    Necrostatin-1 (Nec-1) is a potent and cross the blood-brain barrier 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.
    Necrostatin-1
  • HY-108331
    3-TYP
    Inhibitor 99.90%
    3-TYP is an inhibitor of SIRT3 (IC50: ~377 μM) and an inhibitor of Methionine Adenosyltransferase (MAT) 2 and Indoleamine 2,3-Dioxygenase (IDO). There may be many off-target sites for 3-TYP that need to be examined, such as NAD-dependent enzymes, including dehydrogenases.
    3-TYP
  • 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.
    Epacadostat
  • HY-16724
    Indoximod
    Inhibitor 99.04%
    Indoximod (1-Methyl-D-tryptophan) is an orally active indoleamine 2,3-dioxygenase (IDO) pathway inhibitor. Indoximod acts as a Trp mimetic in regulating mTOR. Indoximod is an immunometabolic adjuvant used for the research of cancer.
    Indoximod
  • HY-101560
    Linrodostat
    Inhibitor 99.89%
    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.
    Linrodostat
  • HY-160025
    IDO antagonist-1
    Antagonist
    IDO antagonist-1 (compound 163) is an antagonist of IDO . IDO antagonist-1 inhibits pancreatic adenocarcinoma cells growth in C57BL/6 mice.
    IDO antagonist-1
  • HY-156400
    IDO1-IN-23
    Inhibitor
    IDO1-IN-23 (compound 41) is a potent human IDO1 inhibitor with an IC50 value of 13 μM.
    IDO1-IN-23
  • HY-N0110R
    Palmatine chloride (Standard)
    Inhibitor
    Palmatine (chloride) (Standard) is the analytical standard of Palmatine (chloride). This product is intended for research and analytical applications. Palmatine chloride is an orally active and irreversible indoleamine 2,3-dioxygenase 1 (IDO-1) inhibitor with IC50s of 3 μM and 157μM against HEK 293-hIDO-1 and rhIDO-1, respectively. Palmatine chloride can also inhibit West Nile virus (WNV) NS2B-NS3 protease in an uncompetitive manner with an IC50 of 96 μM. Palmatine chloride shows anti-cancer, anti-oxidation, anti-inflammatory, neuroprotection, antibacterial, anti-viral activities.
    Palmatine chloride (Standard)
  • HY-N0110
    Palmatine chloride
    Inhibitor 99.77%
    Palmatine chloride is an orally active and irreversible indoleamine 2,3-dioxygenase 1 (IDO-1) inhibitor with IC50s of 3 μM and 157μM against HEK 293-hIDO-1 and rhIDO-1, respectively. Palmatine chloride can also inhibit West Nile virus (WNV) NS2B-NS3 protease in an uncompetitive manner with an IC50 of 96 μM. Palmatine chloride shows anti-cancer, anti-oxidation, anti-inflammatory, neuroprotection, antibacterial, anti-viral activities.
    Palmatine chloride
  • 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.
    (Rac)-Indoximod
  • HY-13983
    IDO-IN-7
    Inhibitor 99.98%
    IDO-IN-7 (NLG-919 analogue) is a a potent IDO1 inhibitor with an IC50 of 38 nM.
    IDO-IN-7
  • 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.
    Navoximod
  • HY-N0736
    Coptisine chloride
    Inhibitor 98.24%
    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.
    Coptisine chloride
  • HY-N0707
    (S)-Indoximod
    Inhibitor 99.47%
    (S)-Indoximod (1-Methyl-L-tryptophan) is an inhibitor of indoleamine 2,3-dioxygenase (IDO) (Ki: 19 μM). (S)-Indoximod can be used for the research of cancer and neurological disease.
    (S)-Indoximod
  • 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.
    IACS-8968
  • HY-101111
    PF-06840003
    Inhibitor 99.95%
    PF-06840003 (EOS200271) is a highly selective, orally active and brain-penetrant 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.
    PF-06840003
  • HY-100687
    GNF-PF-3777
    Inhibitor 98.56%
    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.
    GNF-PF-3777
  • HY-15683
    IDO5L
    Inhibitor 99.89%
    IDO5L is a potent indoleamine 2,3-dioxygenase (IDO) inhibitor with an IC50 of 67 nM.
    IDO5L
  • HY-148383
    DP00477
    Inhibitor 99.03%
    DP00477 is a potent IDO1 (indoleamine 2,3-dioxygenase 1) inhibitor with an IC50 value of 7.0 µM. DP00477 has the potential for the research of cancer.
    DP00477
  • HY-151108
    IDO1/TDO-IN-4
    Inhibitor 99.23%
    IDO1/TDO-IN-4 is a potent IDO1/TDO dual inhibitor, with IC50 values of 3.53 μM (IDO1) and 1.15 μM (TDO). IDO1/TDO-IN-4 forms hydrogen bond with IDO1, and π−π stacking interaction with TDO. IDO1/TDO-IN-4 can be used in the research of depression, and depression-induced infectious, metabolic, and autoimmune disorders.
    IDO1/TDO-IN-4
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