Name: GSK126
Brand: Selleck Chemicals
SKU: S7061
Availability: InStock
Rating: 5 (176 reviews)

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Quality Control

Batch: Purity: 99.91%

99.91

Related Targets	HDAC JAK BET Histone Methyltransferase PKC PARP HIF PRMT AMPK Histone Acetyltransferase
Other EZH2 Inhibitors	PF-06821497 Tulmimetostat (CPI-0209) Valemetostat (DS-3201) GSK343 Lirametostat (CPI-1205) SHR2554 EZH2/HSP90-IN-29 EBI-2511

Cell Culture, Treatment & Working Concentration

Cell Lines	Assay Type	Incubation Time	Activity Description	PMID
human U87MG cells	Cytotoxic assay	72 h	Cytotoxicity against human U87MG cells assessed as growth inhibition after 72 hrs by WST-1 assay, GI50=28.5 μM.	24767850
human A549 cells	Cytotoxic assay	72 h	Cytotoxicity against human A549 cells assessed as growth inhibition after 72 hrs by WST-1 assay, GI50=18.7 μM.	24767850
human T98G cells	Cytotoxic assay	72 h	Cytotoxicity against human T98G cells assessed as growth inhibition after 72 hrs by WST-1 assay, GI50=12.6 μM.	24767850
human Daudi cells	Cytotoxic assay	72 h	Cytotoxicity against human Daudi cells assessed as growth inhibition after 72 hrs by WST-1 assay, GI50=11.2 μM.	24767850
human PC3 cells	Cytotoxic assay	72 h	Cytotoxicity against human PC3 cells assessed as growth inhibition after 72 hrs by WST-1 assay, GI50=9.4 μM.	24767850
human U2932 cells	Cytotoxic assay	72 h	Cytotoxicity against human U2932 cells assessed as growth inhibition after 72 hrs by WST-1 assay, GI50=6.7 μM.	24767850
human HeLa cells	Function assay	72 h	Inhibition of EZH2 in human HeLa cells assessed as reduction in H3K27me3 levels incubated for 72 hrs by ELISA method, IC50=0.28 μM.	26189078
human Pfeiffer cells	Cytotoxic assay	72 h	Cytotoxicity against human Pfeiffer cells expressing EZH2 A667G mutant assessed as growth inhibition after 72 hrs by WST-1 assay, GI50=0.18 μM.	24767850
infected SF9 cells			Binding affinity to EZH2 (unknown origin) expressed in baculovirus infected SF9 cells co-expressing SUZ12/EED/RbAp48 complex assessed as binding off-rate at 0.4 uM incubated for 20 mins by Q-TOF mass spectrometry	27512831
A673 cells			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for A673 cells	29435139
DAOY cells			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for DAOY cells	29435139
Saos-2 cells			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for Saos-2 cells	29435139
BT-37 cells			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for BT-37 cells	29435139
RD cells			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for RD cells	29435139
SK-N-SH cells			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SK-N-SH cells	29435139
BT-12 cells			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for BT-12 cells	29435139
MG 63 (6-TG R) cells			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for MG 63 (6-TG R) cells	29435139
NB1643 cells			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for NB1643 cells	29435139
OHS-50 cells			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for OHS-50 cells	29435139
Rh41 cells			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for Rh41 cells	29435139
SK-N-MC cells			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for SK-N-MC cells	29435139
LAN-5 cells			qHTS of pediatric cancer cell lines to identify multiple opportunities for drug repurposing: Primary screen for LAN-5 cells	29435139
Click to View More Cell Line Experimental Data

Solubility

In vitro
Batch:

DMSO : 5 mg/mL (9.49 mM)
(Moisture-contaminated DMSO may reduce solubility. Use fresh, anhydrous DMSO.)

Ethanol : 4 mg/mL

Water : 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.
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	4%DMSO 1 Corn oil Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.	0.500mg/ml (0.95mM)	Taking the 1 mL working solution as an example, add 40 μL of 12.5 mg/ml clear DMSO stock solution to 960 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.

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	526.67	Formula	C₃₁H₃₈N₆O₂	Storage (From the date of receipt)	3 years-20°Cpowder
CAS No.	1346574-57-9	Download SDF		Storage of Stock Solutions	1 year-80°Cin solvent 1 month-20°Cin solvent
Synonyms	GSK2816126A, GSK2816126			Smiles	CCC(C)N1C=C(C2=C(C=C(C=C21)C3=CN=C(C=C3)N4CCNCC4)C(=O)NCC5=C(C=C(NC5=O)C)C)C

Mechanism of Action

Targets/IC₅₀/Ki	EZH2 (Cell-free assay) 9.9 nM
In vitro	In vitro, GSK126 most potently inhibits H3K27me3, followed by H3K27me2 in both EZH2 wild-type and mutant DLBCL cell lines. This compound also effectively inhibits the proliferation of EZH2 mutant DLBCL cell lines, and induces transcriptional activation of EZH2 target genes in sensitive cell lines. In A687V EZH2-mutant cells, this treatment results in a global decrease in H3K27me3, robust gene activation, caspase activation, and decreased proliferation. In parental H2087 cells, it inhibits the expression of VEGF-A and phosphorylated Ser(473)-AKT, and thus causes the inhibition of cell proliferation, migration and metastasis.
Kinase Assay	EZH2 assay
Kinase Assay	The five-member PRC2 complex (Flag–EZH2, EED, SUZ12, AEBP2, RbAp48) containing either wild-type or mutant EZH2 is prepared. GSK126 is dissolved in DMSO and tested at concentrations of 0.6 nM to 300 nM with a final DMSO concentration of 2.5%. In contrast to wild-type EZH2 which prefers H3K27me0 as a substrate in vitro, EZH2 Y641 mutants prefer H3K27me2 and have little activity with H3K27me0 or H3K27me1. The A677G mutant is distinct from both the wild-type and Y641 mutant forms of EZH2 in that it efficiently methylates H3K27me0, H3K27me1, and H3K27me2; therefore, histone H3 peptides (residues 21–44; 10 μM final) with either K27me0 (wild type, A677G EZH2), K27me1 (A677G EZH2), or K27me2 (A677G, Y641N, Y641C, Y641H, Y641S and Y641F EZH2) are used as methyltransferase substrates. This compound is added to plates followed by addition of 6 nM EZH2 complex and peptide. As the potency of this chemical is at or near the tight binding limit of an assay run at [SAM] = Km, IC50 values are measured at a high concentration of the competitive substrate SAM relative to its Km (7.5 μM SAM where the SAM Km is 0.3 μM). Under these conditions, the contribution from the enzyme concentration becomes relatively small and accurate estimates of Ki can be calculated. Reactions are initiated with [³H]-SAM, incubated for 30 min, quenched with the addition of 500-fold excess unlabelled SAM, and the methylated product peptide is captured on phosphocellulose filters according to the vendor supplied protocol for MSPH Multiscreen plates. Plates are read on a TopCount after adding 20 μL of Microscint-20 cocktail. Apparent Ki values are calculated using the Cheng–Prusoff relationship for a competitive inhibitor. IC50=Ki (1+[S]/Km)+[E]/2, where E is the enzyme and S is the substrate.
In vivo	In mice bearing KARPAS-422 and Pfeiffer xenografts, GSK126 (150 mg/kg/d, i.p.) decreases global H3K27me3, increases gene expression, and thus causes marked tumour regression.
References	[1] https://pubmed.ncbi.nlm.nih.gov/23051747/ [2] https://pubmed.ncbi.nlm.nih.gov/25253781/ [3] https://pubmed.ncbi.nlm.nih.gov/25477340/

Applications

Methods	Biomarkers	PMID
Western blot	β-catenin / c-Myc / LEF1 / DVL2 / DVL3 / p-GSK3β XIAP / Survivin / MCL-1 / BID / BIM / BAX / BCL-xl/ Bcl-2 H3K27Me3 / EZH2	27926488
Immunofluorescence	H3K27me3	25053977
Growth inhibition assay	Cell proliferation Cell viability	29685965

Clinical Trial Information

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

NCT Number	Recruitment	Conditions	Sponsor/Collaborators	Start Date	Phases
NCT02082977	Terminated	Cancer\|Neoplasms	GlaxoSmithKline	April 24 2014	Phase 1

Tech Support

Handling Instructions

Tel: +1-832-582-8158 Ext:3

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Frequently Asked Questions

Question 1:
Could you please suggest a vehicle for in vivo uses of this compound without oil?

Answer:
It could be dissolved in 4% DMSO+30% PEG 300+ddH2O (0.5mg/ml).

Question 2:
Does this compound require an activation step to be functional? For example, an acidic or basic environment.

Answer:
It does not require an activation step to be functional.

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GSK126 EZH2 inhibitor

Chemical Structure

Molecular Weight: 526.67