MedKoo Cat#: 406635 | Name: GSK-503
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Description:

WARNING: This product is for research use only, not for human or veterinary use.

GSK-503 is a potent EZH2 inhibitor with potential anticancer activity. Increased activity of the epigenetic modifier EZH2 has been associated with different cancers. In a melanoma mouse model, conditional Ezh2 ablation as much as treatment with the preclinical EZH2 inhibitor GSK503 stabilizes the disease through inhibition of growth and virtually abolishes metastases formation without affecting normal melanocyte biology. Comparably, in human melanoma cells, EZH2 inactivation impairs proliferation and invasiveness, accompanied by re-expression of tumour suppressors connected to increased patient survival. These EZH2 target genes suppress either melanoma growth or metastasis in vivo, revealing the dual function of EZH2 in promoting tumour progression. Thus, EZH2-mediated epigenetic repression is highly relevant especially during advanced melanoma progression, which makes EZH2 a promising target for novel melanoma therapies. ( Nat Commun. 2015 Jan 22;6:6051. doi: 10.1038/ncomms7051. )

Chemical Structure

GSK-503
GSK-503
CAS#1346572-63-1

Theoretical Analysis

MedKoo Cat#: 406635

Name: GSK-503

CAS#: 1346572-63-1

Chemical Formula: C31H38N6O2

Exact Mass: 526.3056

Molecular Weight: 526.67

Elemental Analysis: C, 70.70; H, 7.27; N, 15.96; O, 6.08

Price and Availability

Size Price Availability Quantity
5mg USD 90.00 Ready to ship
10mg USD 150.00 Ready to ship
25mg USD 250.00 Ready to ship
50mg USD 450.00 Ready to ship
100mg USD 750.00 Ready to ship
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Related CAS #
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Synonym
GSK503; GSK 503; GSK503.
IUPAC/Chemical Name
N-((4,6-dimethyl-2-oxo-1,2-dihydropyridin-3-yl)methyl)-1-isopropyl-3-methyl-6-(6-(4-methylpiperazin-1-yl)pyridin-3-yl)-1H-indole-4-carboxamide
InChi Key
HRDQQHUKUIKFHT-UHFFFAOYSA-N
InChi Code
InChI=1S/C31H38N6O2/c1-19(2)37-18-21(4)29-25(30(38)33-17-26-20(3)13-22(5)34-31(26)39)14-24(15-27(29)37)23-7-8-28(32-16-23)36-11-9-35(6)10-12-36/h7-8,13-16,18-19H,9-12,17H2,1-6H3,(H,33,38)(H,34,39)
SMILES Code
O=C(C1=CC(C2=CC=C(N3CCN(C)CC3)N=C2)=CC4=C1C(C)=CN4C(C)C)NCC5=C(C)C=C(C)NC5=O
Appearance
Yellow solid powder
Purity
>98% (or refer to the Certificate of Analysis)
Shipping Condition
Shipped under ambient temperature as non-hazardous chemical. This product is stable enough for a few weeks during ordinary shipping and time spent in Customs.
Storage Condition
Dry, dark and at 0 - 4 C for short term (days to weeks) or -20 C for long term (months to years).
Solubility
Soluble in DMSO, not in water
Shelf Life
>2 years if stored properly
Drug Formulation
This drug may be formulated in DMSO
Stock Solution Storage
0 - 4 C for short term (days to weeks), or -20 C for long term (months).
HS Tariff Code
2934.99.9001
More Info
        
Biological target:
GSK503 is an inhibitor of EZH2 methyltransferase with Kiapp values of 3 to 27 nM.
In vitro activity:
First, this study used an epigenetic compound, GSK-503, which specifically targets the catalytic subunit of EZH2. Inhibition of EZH2 in cells treated with GSK-503 and TGF-β led to a significant decrease in fibronectin, α-SMA, and collagen 1α1, both at mRNA and protein levels (Figure 3A and B). Parallel to this effect, this study confirmed a significant down-regulation of H3K27me3 measured by Western blot and immunofluorescence (Figure 3C and D). Reference: Cell Mol Gastroenterol Hepatol. 2019; 7(1): 197–209. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6282644/
In vivo activity:
The decreased severity of bm12 cGVHD when Ezh2 genetically deleted in donor T cells and previous observations that Ezh2 is upregulated in GC T and B cells suggested that pharmacological inhibition of Ezh2 might suppress lupus-like features of bm12 cGVHD. This study tested this hypothesis by evaluating the ability of GSK503, a small molecule Ezh2 inhibitor, to suppress disease in this study’s cGVHD model when treatment is initiated 2 days before donor T cell injection. Mice were followed with serum levels of anti-dsDNA and anti-chromatin antibody. As expected, serum anti-dsDNA and anti-chromatin Ab levels increased in 2 weeks in bm12 host mice injected with WT, but not Ezh2-deficient CD4+ T cells (Figs. 1 and 6). Importantly, the increase in autoantibody levels in bm12 hosts injected with WT B6 CD4+ T cells was totally prevented by the GSK503 treatment (Fig. 6). These observations suggest that agents, such as GSK503, that specifically target Ezh2 may be useful for the treatment of SLE autoimmunity. Reference: Arthritis Res Ther. 2020; 22: 133. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7275547/

Preparing Stock Solutions

The following data is based on the product molecular weight 526.67 Batch specific molecular weights may vary from batch to batch due to the degree of hydration, which will affect the solvent volumes required to prepare stock solutions.

Recalculate based on batch purity %
Concentration / Solvent Volume / Mass 1 mg 5 mg 10 mg
1 mM 1.15 mL 5.76 mL 11.51 mL
5 mM 0.23 mL 1.15 mL 2.3 mL
10 mM 0.12 mL 0.58 mL 1.15 mL
50 mM 0.02 mL 0.12 mL 0.23 mL
Formulation protocol:
1. Martin-Mateos R, De Assuncao TM, Arab JP, Jalan-Sakrikar N, Yaqoob U, Greuter T, Verma VK, Mathison AJ, Cao S, Lomberk G, Mathurin P, Urrutia R, Huebert RC, Shah VH. Enhancer of Zeste Homologue 2 Inhibition Attenuates TGF-β Dependent Hepatic Stellate Cell Activation and Liver Fibrosis. Cell Mol Gastroenterol Hepatol. 2019;7(1):197-209. doi: 10.1016/j.jcmgh.2018.09.005. Epub 2018 Sep 15. PMID: 30539787; PMCID: PMC6282644. 2. Zhen Y, Smith RD, Finkelman FD, Shao WH. Ezh2-mediated epigenetic modification is required for allogeneic T cell-induced lupus disease. Arthritis Res Ther. 2020 Jun 5;22(1):133. doi: 10.1186/s13075-020-02225-9. PMID: 32503684; PMCID: PMC7275547. 3. Zingg D, Debbache J, Schaefer SM, Tuncer E, Frommel SC, Cheng P, Arenas-Ramirez N, Haeusel J, Zhang Y, Bonalli M, McCabe MT, Creasy CL, Levesque MP, Boyman O, Santoro R, Shakhova O, Dummer R, Sommer L. The epigenetic modifier EZH2 controls melanoma growth and metastasis through silencing of distinct tumour suppressors. Nat Commun. 2015 Jan 22;6:6051. doi: 10.1038/ncomms7051. PMID: 25609585.
In vitro protocol:
1. Martin-Mateos R, De Assuncao TM, Arab JP, Jalan-Sakrikar N, Yaqoob U, Greuter T, Verma VK, Mathison AJ, Cao S, Lomberk G, Mathurin P, Urrutia R, Huebert RC, Shah VH. Enhancer of Zeste Homologue 2 Inhibition Attenuates TGF-β Dependent Hepatic Stellate Cell Activation and Liver Fibrosis. Cell Mol Gastroenterol Hepatol. 2019;7(1):197-209. doi: 10.1016/j.jcmgh.2018.09.005. Epub 2018 Sep 15. PMID: 30539787; PMCID: PMC6282644.
In vivo protocol:
1. Zhen Y, Smith RD, Finkelman FD, Shao WH. Ezh2-mediated epigenetic modification is required for allogeneic T cell-induced lupus disease. Arthritis Res Ther. 2020 Jun 5;22(1):133. doi: 10.1186/s13075-020-02225-9. PMID: 32503684; PMCID: PMC7275547. 2. Zingg D, Debbache J, Schaefer SM, Tuncer E, Frommel SC, Cheng P, Arenas-Ramirez N, Haeusel J, Zhang Y, Bonalli M, McCabe MT, Creasy CL, Levesque MP, Boyman O, Santoro R, Shakhova O, Dummer R, Sommer L. The epigenetic modifier EZH2 controls melanoma growth and metastasis through silencing of distinct tumour suppressors. Nat Commun. 2015 Jan 22;6:6051. doi: 10.1038/ncomms7051. PMID: 25609585.
Martin-Mateos R, De Assuncao TM, Arab JP, Jalan-Sakrikar N, Yaqoob U, Greuter T, Verma VK, Mathison AJ, Cao S, Lomberk G, Mathurin P, Urrutia R, Huebert RC, Shah VH. Enhancer of Zeste Homologue 2 Inhibition Attenuates TGF-β Dependent Hepatic Stellate Cell Activation and Liver Fibrosis. Cell Mol Gastroenterol Hepatol. 2019;7(1):197-209. doi: 10.1016/j.jcmgh.2018.09.005. Epub 2018 Sep 15. PMID: 30539787; PMCID: PMC6282644.