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

Indoleamine 2,3-Dioxygenase (IDO)

Indoleamine 2,3-Dioxygenase (IDO)

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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:

Indoleamine 2,3-Dioxygenase (IDO) Isoform Comparison
Cat. No. Product Name Effect Purity Chemical Structure
  • HY-112164
    IACS-8968
    		Inhibitor 98.46%
    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-100687
    GNF-PF-3777
    		Inhibitor 98.03%
    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-151093
    IDO2-IN-1
    		Inhibitor 98.86%
    IDO2-IN-1 is an orally active and potent Indoleamine 2,3-dioxygenase 2 (IDO2) inhibitor with an IC50 value of 112 nM. IDO2-IN-1 can be used for inflammatory autoimmunity research.
    IDO2-IN-1
  • HY-100771
    PCC0208009
    		Inhibitor 99.08%
    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 .
    PCC0208009
  • HY-131911
    PROTAC IDO1 Degrader-1
    		Inhibitor 98.17%
    PROTAC IDO1 Degrader-1 is the first potent IDO1 (indoleamine 2,3-dioxygenase 1) degrader that hijacks IDO1 to Cereblon E3 ligase to introduce IDO1 into UPS and eventually achieve ubiquitination and degradation (DC50=2.84 μM). PROTAC IDO1 Degrader-1 moderately improves the tumor-killing activity of H ER2 CAR-T cells.
    PROTAC IDO1 Degrader-1
  • HY-N0430A
    Coptisine Sulfate
    		Inhibitor 99.37%
    Coptisine Sulfate 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 Sulfate
  • HY-15683
    IDO5L
    		Inhibitor 99.89%
    IDO5L is a potent indoleamine 2,3-dioxygenase (IDO) inhibitor with an IC50 of 67 nM.
    IDO5L
  • HY-144651
    IDO1-IN-18
    		Inhibitor 98.00%
    IDO1-IN-18 (Compound 14) is a potent inhibitor of IDO1. IDO1-IN-18 has the potential for the research of cancer diseases.
    IDO1-IN-18
  • 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.
    IDO-IN-3
  • HY-18769
    BMS-978587
    		Inhibitor 99.92%
    BMS-978587 (IDO-IN-4) is an indoleamine 2,3-dioxygenase 1 (IDO-1) inhibitor, extracted from patent WO2014150677A1, Compound example 1 enantiomer 1.
    BMS-978587
  • HY-145280
    IDO1/2-IN-1
    		Inhibitor 98.06%
    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.
    IDO1/2-IN-1
  • HY-153764
    IDO-IN-18
    		Inhibitor
    IDO-IN-18 (Compound 00815) is an IDO inhibitor. IDO-IN-18 can be used for research of immunosuppression associated infectious or cancer diseases.
    IDO-IN-18
  • HY-139205
    BMT-297376
    		Inhibitor 99.14%
    BMT-297376, the optimized Linrodostat, is a potent IDO1 inhibitor.
    BMT-297376
  • HY-144652
    IDO1-IN-19
    		Inhibitor 98.52%
    IDO1-IN-19 (Compound 17) is an orally active IDO1 inhibitor with an IC50 of CYP2C9 of 8.64 μM. IDO1-IN-19 also acts funciton on cardiac channels, with IC50s of 12 μM (IKr), 40 μM (INa), 8.3 μM (ICa), respectively. IDO1-IN-19 has the potential to study cancer diseases.
    IDO1-IN-19
  • HY-N0110A
    Palmatine
    		Inhibitor
    Palmatine 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 can also inhibit West Nile virus (WNV) NS2B-NS3 protease in an uncompetitive manner with an IC50 of 96 μM. Palmatine shows anti-cancer, anti-oxidation, anti-inflammatory, neuroprotection, antibacterial, anti-viral activities.
    Palmatine
  • HY-79531
    IDO-IN-1
    		Inhibitor 98.13%
    IDO-IN-1 is a potent indoleamine 2,3-dioxygenase (IDO) inhibitor with an IC50 of 59 nM.
    IDO-IN-1
  • HY-111540B
    (S)-LY-3381916
    		Inhibitor 99.06%
    (S)-LY-3381916 ((S)-IDO1-IN-5; Example 1B) is an active S-isomer of LY-3381916. (S)-LY-3381916 binds to IDOL with an IC50 value less than 1.5 µΜ. LY-3381916 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.
    (S)-LY-3381916
  • HY-128355
    IDO/TDO-IN-1
    		Inhibitor 99.22%
    IDO/TDO-IN-1 (compound 25) is a highly potent and orally active dual indoleamine-2,3-dioxygenase (IDO) and tryptophan 2,3-dioxygenase (TDO) inhibitor with IC50s of 9.7 and 47 nM, respectively .
    IDO/TDO-IN-1
  • HY-111540A
    (Rac)-LY-3381916
    		Inhibitor 99.12%
    (Rac)-LY-3381916 ((Rac)-IDO1-IN-5; Example 1) is a racemate of LY-3381916. LY-3381916 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.
    (Rac)-LY-3381916
  • HY-18770
    IDO-IN-5
    		Inhibitor 99.90%
    IDO-IN-5 (NLG-1489) is an indoleamine 2,3-dioxygenase (IDO) inhibitor extracted from patent WO WO2012142237A1, compound 1489, has an IC50 of 1-10 μM.
    IDO-IN-5
Cat. No. Product Name / Synonyms Species Source
Cat. No. Product Name / Synonyms Application Reactivity
Indoleamine 2,3-Dioxygenase (IDO) Isoform Comparison

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