Name: Telaglenastat (CB-839)
Brand: Selleck Chemicals
SKU: S7655
Availability: InStock
Rating: 5 (111 reviews)

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Quality Control

Batch: Purity: 99.95%

99.95

Related Targets	HDAC Caspase Proteasome Secretase MMP HCV Protease Cysteine Protease DPP Tyrosinase HIV Protease
Other Glutaminase Products	Sirpiglenastat (DRP-104) BPTES JHU-083 GK921 Zampilimab (Anti-TGM2 / Transglutaminase 2) TGM2 Antibody [K23K16] LDN-27219 JHU395 6-Diazo-5-oxo-L-norleucine (Diazooxonorleucine) UPGL00004

Cell Culture, Treatment & Working Concentration

Cell Lines	Assay Type	Concentration	Incubation Time	Activity Description	PMID
MDA-MB-231 cells	Cytotoxicity assay		6 days	Cytotoxicity against human MDA-MB-231 cells measured on 6th day by hemocytometry, IC50=0.033 μM	26988803
TNBC cell lines	Growth inhibiton assay	1 μM	4 days	CB-839 treatment induced cell loss or decreased cell proliferation by more than 50% in six cell lines (HCC1806, HCC1143, HCC38, MDA-MB-436, MDA-MB-231 and Hs578T); the other six cell lines (HCC1937, HCC70, BT549, MDA-MB-157, MDA-MB-453 and MDA-MB468) were either not affected or had their cell proliferation affected by less than 50% and were called resistant.	31040181
MM.1S BzR cells	Function assay	5 μM	16 hours	treatment with CB-839 significantly repressed oxygen consumption rate in proteasome-inhibitor resistant cells.	28415782
MM.1S cells	Cell viability assay		72 hours		28415782
U266 cell lines	Cell viability assay		72 hours		28415782
HT1080	Cytotoxicity assay		48 h	IC50 = 44.38 μM	28174105
HCC827	Cytotoxicity assay			IC50 = 51.42 μM	28174105
Click to View More Cell Line Experimental Data

Solubility

In vitro
Batch:

DMSO : 100 mg/mL (174.95 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : Insoluble

Ethanol : Insoluble

Molarity Calculator

Mass	Concentration	Volume	Molecular Weight
Mass value Mass unit	Concentration value Concentration unit	Volume value Volume unit	Molecular weight (g/mol)

Dilution Calculator Molecular Weight Calculator

In vivo batch selection In vivo Batch:
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5% DMSO 1 95% Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.250mg/ml (0.44mM)	Taking the 1 mL working solution as an example, add 50 μL of 5 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5% DMSO 1 95% Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.800mg/ml (1.40mM)	Taking the 1 mL working solution as an example, add 50 μL of 16 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.
Homogeneous suspension	CMC-NA	≥5mg/ml	Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution	5%DMSO 1 40%PEG300 2 5%Tween80 3 50%ddH2O Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.800mg/ml (1.40mM)	Taking the 1 mL working solution as an example, add 50 μL of 16 mg/ml clarified DMSO stock solution to 400 μL of PEG300, mix evenly to clarify it; add 50 μL of Tween80 to the above system, mix evenly to clarify; then continue to add 500 μL of ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results.
Clear solution	5% DMSO 1 95% Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.500mg/ml (0.87mM)	Taking the 1 mL working solution as an example, add 50 μL of 10 mg/ml clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results.

In vivo Formulation Calculator (Clear solution)

Step 1: Enter information below (Recommended: An additional animal making an allowance for loss during the experiment)

Dosage: mg/kg

Average weight of animals: g

Dosing volume per animal: μL

Number of animals:

Step 2: Enter the in vivo formulation (This is only the calculator, not formulation. Please contact us first if there is no in vivo formulation at the solubility Section.)

% DMSO

%

% Tween 80

% ddH₂O

% DMSO

+

%

Calculation results:

Working concentration: mg/ml;

Method for preparing DMSO master liquid: mg drug pre-dissolved in μL DMSO ( Master liquid 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 master liquid, next addμL PEG300, mix and clarify, next addμL Tween 80, mix and clarify, next add μL ddH₂O, mix and clarify.

Method for preparing in vivo formulation: Take μL DMSO master liquid, next add μL Corn oil, mix and clarify.

Note: 1. Please make sure the liquid is clear before adding the next solvent.
2. Be sure to add the solvent(s) in order. You must ensure that the solution obtained, in the previous addition, is a clear solution before proceeding to add the next solvent. Physical methods such
as vortex, ultrasound or hot water bath can be used to aid dissolving.

Chemical Information, Storage & Stability

Molecular Weight	571.57	Formula	C₂₆H₂₄F₃N₇O₃S	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	1439399-58-2	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	N/A			Smiles	C1=CC=NC(=C1)CC(=O)NC2=NN=C(S2)CCCCC3=NN=C(C=C3)NC(=O)CC4=CC(=CC=C4)OC(F)(F)F

Mechanism of Action

Targets/IC₅₀/Ki	Glutaminase (Cell-free assay) 24 nM
In vitro	Telaglenastat (CB-839) exhibits time-dependent and slowly reversible kinetics. Its IC50 values for glutaminase inhibition following preincubation with rHu-GAC for-1 hour are < 50 nmol/L, at least 13-fold lower than with BPTES. This compound has antiproliferative activity in a triple-negative breast cancer (TNBC) cell line, HCC-1806, while no antiproliferative activity is observed in an estrogen receptor–positive cell line, T47D.
Kinase Assay	Inhibition of CB-839 on rHu-GAC
Kinase Assay	The enzymatic activity is measured in assay buffer containing 50 mM Tris-Acetate pH 8.6, 150 mM K2HPO4 , 0.25 mM EDTA, 0.1 mg/mL bovine serum albumin, 1 mM DTT, 2 mM NADP+ and 0.01% Triton X-100. To measure inhibition by Telaglenastat (CB-839), the inhibitor (prepared in DMSO) is first pre-mixed with glutamine and glutamate dehydrogenase (GDH) and reactions are initiated by the addition of rHu-GAC. Final reactions contains 2 nM rHu-GAC, 10 mM glutamine, 6 units/mL GDH and 2% DMSO. Generation of NADPH is monitored by fluorescence (Ex340/Em460 nm) every minute for 15 minutes on a SpectraMax M5e plate reader. Relative fluorescence units (RFU) are converted to units of NADPH concentration (µM) using a standard curve of NADPH. Each assay plate incorporates control reactions that monitores the conversion of glutamate (1 to 75 µM) plus NADP+ to α-ketoglutarate plus NADPH by GDH. Under these assay conditions, up to 75 µM glutamate is stoichiometrically converts to α-ketoglutarate/NADPH by GDH. Initial reaction velocities are calculated by fitting the first 5 minutes of each progress curve to a straight line. Inhibition curves are fitted to a four-parameter dose response equation of the form: % activity = Bottom + (Top-Bottom)/(1+10^((LogIC50-X)*HillSlope)).
In vivo	In the mouse TNBC model, single agent Telaglenastat (CB-839) (200 mg/kg, p.o.) suppresses tumor growth by 61% relative to vehicle control. In the mouse JIMT-1 xenograft model, this compound alone (200 mg/kg, p.o.) results in 54% tumor growth inhibition (TGI) relative to vehicle control, while its combination with NSC 125973 (10 mg/kg, p.o.) largely suppresses the regrowth of the tumors, resulting in a TGI relative to vehicle control of 100%.
References	[1] https://pubmed.ncbi.nlm.nih.gov/24523301/

Applications

Methods	Biomarkers	Images	PMID
Western blot	collagen I/collagen III		29019707
Growth inhibition assay	Cell growth		28967864

Clinical Trial Information

(data from https://clinicaltrials.gov, updated on 2024-05-22)

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT04250545	Recruiting	Leptomeningeal Neoplasm\|Metastatic Lung Non-Small Cell Carcinoma\|Metastatic Malignant Neoplasm in the Brain\|Recurrent Lung Non-Small Cell Carcinoma\|Stage IV Lung Cancer AJCC v8\|Stage IVA Lung Cancer AJCC v8\|Stage IVB Lung Cancer AJCC v8	National Cancer Institute (NCI)	October 26 2020	Phase 1
NCT02944435	Completed	Healthy Volunteers	Calithera Biosciences Inc	October 2016	Phase 1
NCT02071927	Completed	Acute Myeloid Leukemia (AML)\|Acute Lymphocytic Leukemia (ALL)	Calithera Biosciences Inc	March 2014	Phase 1

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Telaglenastat (CB-839) Glutaminase inhibitor

Chemical Structure

Molecular Weight: 571.57