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

Indoximod  (Synonyms: 1-Methyl-D-tryptophan; NLG-8189)

Cat. No.: HY-16724 Purity: 99.04%
SDS COA Handling Instructions

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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.

For research use only. We do not sell to patients.

Indoximod Chemical Structure

Indoximod Chemical Structure

CAS No. : 110117-83-4

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500 mg USD 80 In-stock
1 g USD 110 In-stock
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Customer Review

Based on 10 publication(s) in Google Scholar

Other Forms of Indoximod:

Indoximod Related Antibodies

Top Publications Citing Use of Products

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

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IDO1 IDO2 IDO

  • Biological Activity

  • Protocol

  • Purity & Documentation

  • References

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Description

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[1][2].

IC50 & Target[1]

IDO

19 μM (Ki)

Cellular Effect
Cell Line Type Value Description References
A549 IC50
> 100 μM
Compound: D-MT
Anticancer activity against human A549 cells assessed as inhibition of cell proliferation measured after 72 hrs by MTT assay
Anticancer activity against human A549 cells assessed as inhibition of cell proliferation measured after 72 hrs by MTT assay
[PMID: 31954880]
HeLa IC50
> 100 μM
Compound: D-MT
Anticancer activity against human HeLa cells assessed as inhibition of cell proliferation measured after 72 hrs by MTT assay
Anticancer activity against human HeLa cells assessed as inhibition of cell proliferation measured after 72 hrs by MTT assay
[PMID: 31954880]
HeLa EC50
110 μM
Compound: L-1MT
Inhibition of IDO1 in IFN-gamma stimulated human HeLa cells using L-tryptophan as substrate after 24 hrs
Inhibition of IDO1 in IFN-gamma stimulated human HeLa cells using L-tryptophan as substrate after 24 hrs
[PMID: 28526475]
HUVEC IC50
> 100 μM
Compound: D-MT
Cytotoxicity against HUVEC cells assessed as inhibition of cell proliferation measured after 72 hrs by MTT assay
Cytotoxicity against HUVEC cells assessed as inhibition of cell proliferation measured after 72 hrs by MTT assay
[PMID: 31954880]
PC-3 IC50
> 100 μM
Compound: D-MT
Anticancer activity against human PC3 cells assessed as inhibition of cell proliferation measured after 72 hrs by MTT assay
Anticancer activity against human PC3 cells assessed as inhibition of cell proliferation measured after 72 hrs by MTT assay
[PMID: 31954880]
U-87MG ATCC IC50
148.9 μM
Compound: 1-D-MT
Inhibition of recombinant human IDO2 expressed in human U87MG cells assessed as reduction in kynurenine formation using L-tryptophan as substrate after 6 hrs by spectrophotometry
Inhibition of recombinant human IDO2 expressed in human U87MG cells assessed as reduction in kynurenine formation using L-tryptophan as substrate after 6 hrs by spectrophotometry
[PMID: 27475108]
In Vitro

The IDO inhibitor 1-methyl-tryptophan exists in two stereoisomers with potentially different biological properties. The L isomer is the more potent inhibitor of IDO activity using the purified enzyme and in HeLa cell–based assays. However, the D isomer is significantly more effective in reversing the suppression of T cells created by IDO-expressing dendritic cells. The L isomer of 1-methyl-tryptophan functioned as a competitive inhibitor (Ki=19 μM), whereas the d isomer is much less effective. The DL mixture is intermediate, with a Ki of 35 μM[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.

Indoximod Related Antibodies
In Vivo

The D isomer is more efficacious as an anticancer agent in chemo-immunotherapy regimens using NSC-26271, NSC 125973, or LY 188011, when tested in mouse models of transplantable melanoma and transplantable and autochthonous breast cancer. The D isomer of 1-methyl-tryptophan specifically targets the IDO gene because the antitumor effect of d-1-methyl-tryptophan is completely lost in mice with a disruption of the IDO gene (IDO-knockout mice). Oral administration of dl-1-methyl-tryptophan in combination with NSC 125973 can elicit regression of autochthonous breast tumors[1].

MedChemExpress (MCE) has not independently confirmed the accuracy of these methods. They are for reference only.
Clinical Trial
Molecular Weight

218.25

Formula

C12H14N2O2
CAS No.
Appearance

Solid

Color

White to off-white

SMILES

N[C@H](CC1=CN(C)C2=CC=CC=C12)C(O)=O
Shipping

Room temperature in continental US; may vary elsewhere.
Storage
Powder -20°C 3 years
4°C 2 years
In solvent -80°C 2 years
-20°C 1 year
Solvent & Solubility
In Vitro: 

H2O : 5 mg/mL (22.91 mM; ultrasonic and adjust pH to 2 with HCl)

DMSO : 0.55 mg/mL (2.52 mM; Need ultrasonic and warming; Hygroscopic DMSO has a significant impact on the solubility of product, please use newly opened DMSO)

Preparing
Stock Solutions
Concentration Solvent Mass 1 mg 5 mg 10 mg
1 mM 4.5819 mL 22.9095 mL 45.8190 mL
5 mM 0.9164 mL 4.5819 mL 9.1638 mL
View the Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

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  • Dilution Calculator

Mass (g) = Concentration (mol/L) × Volume (L) × Molecular Weight (g/mol)

Mass
=
Concentration
×
Volume
×
Molecular Weight *

Concentration (start) × Volume (start) = Concentration (final) × Volume (final)

This equation is commonly abbreviated as: C1V1 = C2V2

Concentration (start)

C1

×
Volume (start)

V1

=
Concentration (final)

C2

×
Volume (final)

V2

In Vivo:

For the following dissolution methods, please prepare the working solution directly. It is recommended to prepare fresh solutions and use them promptly within a short period of time.
The percentages shown for the solvents indicate their volumetric ratio in the final prepared solution. If precipitation or phase separation occurs during preparation, heat and/or sonication can be used to aid dissolution.

  • Protocol 1

    Add each solvent one by one:  PBS

    Solubility: 1 mg/mL (4.58 mM); Clear solution; Need ultrasonic and warming and heat to 60°C

In Vivo Dissolution Calculator
Please enter the basic information of animal experiments:

Dosage

mg/kg

Animal weight
(per animal)

g

Dosing volume
(per animal)

μL

Number of animals

Recommended: Prepare an additional quantity of animals to account for potential losses during experiments.
Calculation results:
Working solution concentration: mg/mL
The concentration of the stock solution you require exceeds the measured solubility. The following solution is for reference only.If necessary, please contact MedChemExpress (MCE).
Purity & Documentation

Purity: 99.85%

SDS (394 KB)

COA (252 KB) HNMR (157 KB) RP-HPLC (258 KB) LCMS (91 KB)

Handling Instructions (2659 KB)
References
Kinase Assay
[1]

1MT enantiomers are solubilized in DMSO containing 0.1N HCl and added at concentrations of 100, 50, and 0 µM to wells containing the reaction mixture with tryptophan (0-200 µM) followed by addition of IDO enzyme. Plates are sealed and incubated 1 hr in a humidified 37°C incubator, after which the reactions are terminated by addition of 12.5 µl 30% TCA per well. Plates are then resealed in plastic wrap, incubated 30 min at 50°C to hydrolyze the reaction product N-formylkynurenine to kynurenine, and centrifuged. Supernatants are transferred to a flat-bottom 96-well plate, mixed with 100 µl Ehrlich reagent and incubated 10 min at room temperature. Absorbance at 490 nm is read[1].

MCE has not independently confirmed the accuracy of these methods. They are for reference only.
References

Complete Stock Solution Preparation Table

* Please refer to the solubility information to select the appropriate solvent. Once prepared, please aliquot and store the solution to prevent product inactivation from repeated freeze-thaw cycles.
Storage method and period of stock solution: -80°C, 2 years; -20°C, 1 year. When stored at -80°C, please use it within 2 years. When stored at -20°C, please use it within 1 year.

Optional Solvent Concentration Solvent Mass 1 mg 5 mg 10 mg 25 mg
DMSO / H2O 1 mM 4.5819 mL 22.9095 mL 45.8190 mL 114.5475 mL
H2O 5 mM 0.9164 mL 4.5819 mL 9.1638 mL 22.9095 mL
10 mM 0.4582 mL 2.2910 mL 4.5819 mL 11.4548 mL
15 mM 0.3055 mL 1.5273 mL 3.0546 mL 7.6365 mL
20 mM 0.2291 mL 1.1455 mL 2.2910 mL 5.7274 mL

* Note: If you choose water as the stock solution, please dilute it to the working solution, then filter and sterilize it with a 0.22 μm filter before use.

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Indoximod Related Classifications

Help & FAQs
  • Do most proteins show cross-species activity?

    Species cross-reactivity must be investigated individually for each product. Many human cytokines will produce a nice response in mouse cell lines, and many mouse proteins will show activity on human cells. Other proteins may have a lower specific activity when used in the opposite species.

Keywords:

Indoximod110117-83-41-Methyl-D-tryptophan NLG-8189NLG8189NLG 8189NLG-8189Indoleamine 2,3-Dioxygenase (IDO)tryptophanTrp mimeticimmunotherapeutic vaccinesmTORC1cancerInhibitorinhibitorinhibit

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