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IDO-IN-1

Alias: IDO-IN-1 IDO-IN1 IDO-IN 1.
Cat No.:V22433 Purity: ≥98%
IDO-IN-1 is a potent and selective indoleamine-2,3-dioxygenase (IDO) inhibitor with IC50 of 59 nM.
IDO-IN-1
IDO-IN-1 Chemical Structure CAS No.: 914638-30-5
Product category: IDO
This product is for research use only, not for human use. We do not sell to patients.
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Purity & Quality Control Documentation

Purity: ≥98%

Product Description
IDO-IN-1 is a potent and selective indoleamine-2,3-dioxygenase (IDO) inhibitor with IC50 of 59 nM. IDO-IN-1 showed in vivo pharmacodynamic activity and efficacy in a mouse melanoma model.
IDO-IN-1 (CAS# 914638-30-5) is a potent and selective inhibitor of indoleamine 2,3-dioxygenase 1 (IDO1). It is a small molecule designed to block the enzymatic activity of IDO1, a key enzyme in the kynurenine pathway of tryptophan metabolism. By inhibiting IDO1, this compound aims to reverse IDO1-mediated immune suppression in the tumor microenvironment and enhance anti-tumor immune responses. It is used in cancer immunotherapy research.
Biological Activity I Assay Protocols (From Reference)
Targets
IDO-IN-1 targets indoleamine 2,3-dioxygenase 1 (IDO1), an enzyme that catalyzes the rate-limiting step in the kynurenine pathway. IDO1 is overexpressed in many cancers and contributes to immune suppression by depleting tryptophan and producing immunosuppressive kynurenines. By inhibiting IDO1, this compound reduces kynurenine production, restores tryptophan levels, and enhances T-cell function.
ln Vitro
IDO-IN-1 (compound 5m) is a strong IDO inhibitor (HeLa IC50=12 nM) [1].
IDO-IN-1 is a potent and selective inhibitor of IDO1. It effectively blocks the conversion of tryptophan to N-formylkynurenine by IDO1. Its activity has been confirmed in enzyme assays using recombinant IDO1 and in cell-based assays using IDO1-expressing cells. The compound demonstrates high potency and selectivity for IDO1 over other related enzymes.
ln Vivo
IDO-IN-1 has been evaluated in preclinical models of cancer to assess its ability to reverse IDO1-mediated immune suppression and inhibit tumor growth. By blocking IDO1 activity, the compound aims to restore T-cell proliferation and function within the tumor microenvironment. However, detailed in vivo efficacy data for this specific compound is limited in the available literature.
Enzyme Assay
The primary in vitro assay for IDO-IN-1 is an enzyme activity assay using purified recombinant IDO1. The enzyme is incubated with its substrate L-tryptophan in the presence of the compound, and the production of N-formylkynurenine is measured spectrophotometrically or by HPLC. The IC50 is determined from dose-response curves.
Cell Assay
In vitro cellular experiments for IDO-IN-1 involve treating IDO1-expressing cells, such as cancer cell lines or dendritic cells, with the compound. The inhibition of IDO1 activity is assessed by measuring kynurenine levels in the culture supernatant using colorimetric assays or HPLC. The effects on T-cell proliferation can be assessed in co-culture assays with IDO1-expressing cells and T-cells.
Animal Protocol
In vivo animal experiments for IDO-IN-1 would typically involve administering the compound to tumor-bearing mice in syngeneic tumor models. The compound's effects on tumor growth, intratumoral kynurenine levels, and immune cell infiltration are assessed. Its ability to enhance the efficacy of other immunotherapies, such as immune checkpoint inhibitors, can also be evaluated.
ADME/Pharmacokinetics
IDO-IN-1 (CAS# 914638-30-5) has a molecular weight of 377.48 g/mol and a molecular formula of C22H23N3O3. It is a small molecule that is typically used as a research reagent. It is soluble in DMSO. It is stored as a powder at -20°C for long-term stability.
Toxicity/Toxicokinetics
IDO-IN-1 is a research compound that is not intended for human use. Its toxicological profile is not extensively characterized in the available literature. As with all research chemicals, standard safety precautions should be followed when handling. Its safety would need to be established for therapeutic applications.
References

[1]. Discovery of potent competitive inhibitors of indoleamine 2,3-dioxygenase with in vivo pharmacodynamic activity and efficacy in a mouse melanoma model. J Med Chem. 2009 Dec 10;52(23):7364-7.

Additional Infomation
IDO-IN-1 (CAS# 914638-30-5) is a potent and selective inhibitor of indoleamine 2,3-dioxygenase 1 (IDO1), a key enzyme in the kynurenine pathway of tryptophan metabolism. IDO1 is overexpressed in many cancers and contributes to immune suppression. By inhibiting IDO1, this compound aims to reverse IDO1-mediated immune suppression and enhance anti-tumor immune responses. It is used in cancer immunotherapy research.
These protocols are for reference only. InvivoChem does not independently validate these methods.
Physicochemical Properties
Molecular Formula
C9H7BRFN5O2
Molecular Weight
316.0904
Exact Mass
314.977
CAS #
914638-30-5
Related CAS #
914638-30-5;
PubChem CID
135741412
Appearance
White to gray solid powder
LogP
2.455
Hydrogen Bond Donor Count
3
Hydrogen Bond Acceptor Count
7
Rotatable Bond Count
3
Heavy Atom Count
18
Complexity
321
Defined Atom Stereocenter Count
0
SMILES
C1=CC(=C(C=C1N=C(C2=NON=C2N)NO)Br)F
InChi Key
ORHZJUSHZUCMKR-UHFFFAOYSA-N
InChi Code
InChI=1S/C9H7BrFN5O2/c10-5-3-4(1-2-6(5)11)13-9(14-17)7-8(12)16-18-15-7/h1-3,17H,(H2,12,16)(H,13,14)
Chemical Name
(Z)-4-amino-N'-(3-bromo-4-fluorophenyl)-N-hydroxy-1,2,5-oxadiazole-3-carboximidamide
Synonyms
IDO-IN-1 IDO-IN1 IDO-IN 1.
HS Tariff Code
2934.99.9001
Storage

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Shipping Condition
Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)
Solubility Data
Solubility (In Vitro)
DMSO : ~120 mg/mL (~379.64 mM)
Solubility (In Vivo)
Solubility in Formulation 1: ≥ 3 mg/mL (9.49 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 30.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

Solubility in Formulation 2: ≥ 3 mg/mL (9.49 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 30.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C,1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.

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Solubility in Formulation 3: ≥ 3 mg/mL (9.49 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 30.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.


 (Please use freshly prepared in vivo formulations for optimal results.)
Preparing Stock Solutions 1 mg 5 mg 10 mg
1 mM 3.1637 mL 15.8183 mL 31.6366 mL
5 mM 0.6327 mL 3.1637 mL 6.3273 mL
10 mM 0.3164 mL 1.5818 mL 3.1637 mL

*Note: Please select an appropriate solvent for the preparation of stock solution based on your experiment needs. For most products, DMSO can be used for preparing stock solutions (e.g. 5 mM, 10 mM, or 20 mM concentration); some products with high aqueous solubility may be dissolved in water directly. Solubility information is available at the above Solubility Data section. Once the stock solution is prepared, aliquot it to routine usage volumes and store at -20°C or -80°C. Avoid repeated freeze and thaw cycles.

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What is the mass of compound required to make a 10 mM stock solution in 5 ml of DMSO given that the molecular weight of the compound is 350.26 g/mol?
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  • The answer of 17.513 mg appears in the Mass box. In a similar way, you may calculate the volume and concentration.

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What volume of a given 10 mM stock solution is required to make 25 ml of a 25 μM solution?
Using the equation C1V1 = C2V2, where C1=10 mM, C2=25 μM, V2=25 ml and V1 is the unknown:
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  • The answer of 62.5 μL (0.1 ml) appears in the Volume (Start) box
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Note: Chemical formula is case sensitive: C12H18N3O4  c12h18n3o4
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Definitions of molecular mass, molecular weight, molar mass and molar weight:
  • Molecular mass (or molecular weight) is the mass of one molecule of a substance and is expressed in the unified atomic mass units (u). (1 u is equal to 1/12 the mass of one atom of carbon-12)
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In vivo Formulation Calculator (Clear solution)
Step 1: Enter information below (Recommended: An additional animal to make allowance for loss during the experiment)
Step 2: Enter in vivo formulation (This is only a calculator, not the exact formulation for a specific product. Please contact us first if there is no in vivo formulation in the solubility section.)
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Calculation results

Working concentration mg/mL;

Method for preparing DMSO stock solution mg drug pre-dissolved in μL DMSO (stock solution concentration mg/mL). Please contact us first if the concentration exceeds the DMSO solubility of the batch of drug.

Method for preparing in vivo formulation:Take μL DMSO stock solution, next add μL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH2O,mix and clarify.

(1) Please be sure that the solution is clear before the addition of next solvent. Dissolution methods like vortex, ultrasound or warming and heat may be used to aid dissolving.
             (2) Be sure to add the solvent(s) in order.

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