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:

Cat. No. Product Name Effect Purity
  • HY-15760
    Necrostatin-1
    Inhibitor 99.87%
    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.
  • 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 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.
  • 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.
  • HY-N0110
    Palmatine chloride
    Inhibitor 99.57%
    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.
  • HY-N0110B
    Palmatine hydroxide
    Inhibitor 99.64%
    Palmatine hydroxide 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 hydroxide can also inhibit West Nile virus (WNV) NS2B-NS3 protease in an uncompetitive manner with an IC50 of 96 μM. Palmatine hydroxide shows anti-cancer, anti-oxidation, anti-inflammatory, neuroprotection, antibacterial, anti-viral activities.
  • HY-145280A
    IDO1/2-IN-1 hydrochloride
    Inhibitor
    IDO1/2-IN-1 hydrochloride (compound 4t) is the first potent IDO1/IDO2 dual inhibitor with IC50s of 28 nM and 144 nM for IDO1 and IDO2, respectively. IDO1/2-IN-1 hydrochloride exhibits antitumor activies. Orally active.
  • HY-145280
    IDO1/2-IN-1
    Inhibitor
    IDO1/2-IN-1 (compound 4t) is the first potent IDO1/IDO2 dual inhibitor with IC50s of 28 nM and 144 nM for IDO1 and IDO2, respectively. IDO1/2-IN-1 exhibits antitumor activies. Orally active.
  • 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 99.95%
    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-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.
  • HY-133897
    (Rac)-Indoximod
    Inhibitor
    (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-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.
  • 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.
  • 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-111540
    IDO1-IN-5
    Inhibitor 99.54%
    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-16987
    IDO-IN-3
    Inhibitor 98.97%
    IDO-IN-3 is a potent indoleamine 2,3-dioxygenase (IDO) inhibitor with an IC50 of 290 nM.

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