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BPTES Glutaminase inhibitor

Cat.No.S7753

BPTES is a potent and selective Glutaminase GLS1 (KGA) inhibitor with IC50 of 0.16 μM. It has no effect on glutamate dehydrogenase activity and causes only a very slight inhibition of γ-glutamyl transpeptidase activity.
BPTES Glutaminase inhibitor Chemical Structure

Chemical Structure

Molecular Weight: 524.68

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Quality Control

Batch: Purity: >97%
97

Cell Culture, Treatment & Working Concentration

Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
MDA-MB-231 cell Cytotoxicity assay 6 days Cytotoxicity against human MDA-MB-231 cells measured on 6th day by hemocytometry, IC50=2.61 μM 26988803
MDA-MB-231 Growth inhibition assay 72 hrs Growth inhibition of human MDA-MB-231 cells after 72 hrs by MTS assay, IC50 = 6.8 μM. 28609101
Aspc-1 Growth inhibition assay 72 hrs Growth inhibition of human Aspc-1 cells after 72 hrs by MTS assay, IC50 = 10.2 μM. 28609101
HCC827 Cytotoxicity assay 48 hrs Cytotoxicity against human erlotinib-resistant HCC827 cells assessed as growth inhibition after 48 hrs by CCK8 assay, IC50 = 42.4 μM. 28174105
HT1080 Cytotoxicity assay 48 hrs Cytotoxicity against human HT1080 cells assessed as growth inhibition after 48 hrs by CCK8 assay, IC50 = 47.72 μM. 28174105
Click to View More Cell Line Experimental Data

Solubility

In vitro
Batch:

DMSO : 50 mg/mL (95.29 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Water : Insoluble

Ethanol : Insoluble

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Mass Concentration Volume Molecular Weight
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In vivo
Batch:

In vivo Formulation Calculator (Clear solution)

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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.
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Chemical Information, Storage & Stability

Molecular Weight 524.68 Formula

C24H24N6O2S3

Storage (From the date of receipt)
CAS No. 314045-39-1 Download SDF Storage of Stock Solutions

Synonyms N/A Smiles C1=CC=C(C=C1)CC(=O)NC2=NN=C(S2)CCSCCC3=NN=C(S3)NC(=O)CC4=CC=CC=C4

Mechanism of Action

Targets/IC50/Ki
Glutaminase GLS1 (KGA)
0.16 μM
In vitro

BPTES inhibits glutaminase activity expressed in human kidney cells with IC50 of 0.18 μM, and inhibits glutamate efflux by microglia with IC50 of 80-120 nM. This compound preferentially slows cell growth in D54 cells with mutant IDH1. It also inhibits glutaminase activity, lowers glutamate and α-KG levels, and increases glycolytic intermediates. This chemical (10 μM) inhibits cell growth of mHCC 3–4 cells derived from LAP/MYC tumors. It also inhibits growth of a MYC-dependent P493 cells by blocking DNA replication, leading to cell death and fragmentation.

Kinase Assay
Glutaminase Inhibition: Cell Free Assay
Assay plates are prepared containing 2 μL test compound in DMSO/well. The enzyme is diluted to 1 unit (liver) or 0.8 unit (kidney)/100 μL in glutaminase assay buffer, and 100 μL diluted enzyme is added to each well of the assay plate by Multidrop. The contents are mixed by shaking at full speed for 1 min on TiterMix 100. The plates are preincubated at room temperature (RT) for 20 min to allow binding of test compounds to glutaminase, and 50 μL glutamine solution (7 mM in assay buffer) is added to each well by Multidrop. The contents are shaken at full speed for 30 sec on TiterMix 100, and the plates are then incubated at RT for 60 min (liver) or 90 min (kidney). To stop the reactions, 20 μL HCl (0.3 N) is added to each well by Multidrop and mixed immediately by shaking for 30 sec on TiterMix 100. For quantification, glutamate (formed by glutaminase-catalyzed hydrolysis of glutamine) is oxidized to 2-oxoglutarate by a second enzyme, glutamate dehydrogenase (GDH), with the concomitant production of the reduced form of nicotinamide adenine dinucleotide (NADH). Reduction of nitro blue tetrazolium (NBT) in the assay solution by NADH, catalyzed by phenazine methosulphate (PMS), results in the formation of a blue-purple formazan. The absorption of formazan at 540 nm is linearly proportional to the concentration of glutamate up to 200 μM. NBT/GDH reagent (50 μL) is added to each well by Multidrop and mixed by shaking for 30 sec on TiterMix 100, and the plates are incubated at RT for 20 min to allow color formation by the GDH reaction. Glutamate concentration is determined from formazan concentration as determined by reading OD540 nm on a SpectraMax 340.
In vivo

In LAP/MYC mice, BPTES (12.5 mg/kg, i.p.) prolongs survival with no significant effects on MYC, GLS, or GLS2 levels. This compound (200 μg/mouse, i.p.) also inhibits tumor cell growth in mice harboring P493 tumor xenografts.

References

Applications

Methods Biomarkers Images PMID
Western blot γH2AX c-Myc / KLF4 / SOX2 / OCT4 / NANOG / GLS1
S7753-WB1
29107960

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