For research use only.
CAS No. 1431612-23-5
UNC1999 is a potent, orally bioavailable and selective inhibitor of EZH2 and EZH1 with IC50 of 2 nM and 45 nM in cell-free assays, respectively, showing >1000-fold selectivity over a broad range of epigenetic and non-epigenetic targets. UNC1999 is a potent autophagy inducer. UNC1999 specifically suppresses H3K27me3/2 and induces a range of anti-leukemia effects including anti-proliferation, differentiation, and apoptosis.
Selleck's UNC1999 has been cited by 17 publications
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Ex vivo growth of the SCLC PDX LX92 is significantly inhibited by the EZH2 inhibitors EPZ-5687, GSK343 and UNC1999 as measured by resazurin conversion (two-way analysis of variance, adjusted for multiple comparisons by the method of Dunnet).
Oncogene, 2015, 10.1038/onc.2015.38. UNC1999 purchased from Selleck.
A. Treatment with UNC1999 (4-6 μM) reduces viable cell numbers in BT73 as assessed by trypan blue exclusion (n=3; ** P<0.01). B. Treatment with varying concentrations of UNC1999 impairs self renewal in BT73 and BT147 as assessed by sphere assay (n=3).
Oncotarget, 2016, 7(37):59360-59376. UNC1999 purchased from Selleck.
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|Description||UNC1999 is a potent, orally bioavailable and selective inhibitor of EZH2 and EZH1 with IC50 of 2 nM and 45 nM in cell-free assays, respectively, showing >1000-fold selectivity over a broad range of epigenetic and non-epigenetic targets. UNC1999 is a potent autophagy inducer. UNC1999 specifically suppresses H3K27me3/2 and induces a range of anti-leukemia effects including anti-proliferation, differentiation, and apoptosis.|
|Features||The first orally bioavailable inhibitor against wild-type and mutant EZH2 as well as EZH1.|
UNC1999 is highly potent for both EZH2 Y641N and EZH2 Y641F mutants in vitro. UNC1999 causes concentration-dependent reductions of H3K27me3 in MCF10A cells with IC50 of 124 nM , while shows low cellular toxicity. UNC1999 displays potent, concentration-dependent inhibition of cell proliferation with EC50 of 633 nM in a DLBCL cell line harboring the EZH2Y641N mutant. In addition, biotinylated UNC1999 enriches EZH2 from HEK293T cell lysates, and thus may be used in chemoproteomics studies. 
|In vivo||Treatment of UNC1999 (150 and 50 mg/kg, i.p.) results in the plasma concentrations of UNC1999 above its cellular IC50 over 24 hours in vivo. In addition, UNC1999 is also orally bioavailable in mice, which makes chronic animal studies more practical and convenient. |
Scintillation Proximity Assay:Methyltransferase activity assays are performed by monitoring the incorporation of tritiumlabeled methyl group from S-adenosylmethionine (3H-SAM) to biotinylated peptide substrates using Scintillation Proximity Assay (SPA) for PRC2-EZH2 trimeric complex (EZH2:EED:SUZ12), PRC2-EZH1 pentameric complex (EZH1:EED:SUZ12:RBBP4:AEBP2), SETD7, G9a, GLP, SETDB1, SETD8, SUV420H1, SUV420H2, SUV39H2, MLL1 tetrameric complex (MLL:WDR5:RbBP5:ASH2L), PRMT1, PRMT3, PRMT5-MEP50 complex and SMYD2. The reaction buffer for SMYD2 and SMYD3 is 50 mM Tris pH 9.0, 5 mM DTT, 0.01% TritonX-100; for G9a, GLP and SUV39H2 is 25 mM potassium phosphate pH 8.0, 1 mM EDTA, 2 mM MgCl2 and 0.01% Triton X-100; and for other HMTs 20 mM Tris pH 8.0, 5 mM DTT, 0.01% TritonX-100. To stop the enzymatic reactions, 10 μL of 7.5 M guanidine hydrochloride is added, followed by 180 μL of buffer, mixed and transferred to a 384-well FlashPlate. After mixing, the reaction mixtures are incubated and the CPM counts are measured using Topcount plate reader. The CPM counts in the absence of compound for each data set are defined as 100% activity. In the absence of the enzyme, the CPM counts in each data set are defined as background (0%). IC50 values are determined using compound concentrations ranging from 100 nM to 100 μM. The IC50 values are determined using SigmaPlot software. EZH2-Y641F assays are performed using 30 nM of enzyme in 20 mM Tris pH 8, 5 mM DTT, 0.01% Triton X-100, 5 μM SAM and 1 μM of H3 (1-24) peptide (same as for the wild-type PRC2-EZH2 complex). For DNMT1, the assay is performed using hemimethylated dsDNA as a substrate. The dsDNA substrate is prepared by annealing two complementary strands (biotintlated forward strand: BGAGCCCGTAAGCCCGTTCAGGTCG and reverse strand: CGACCTGAACGGGCTTACGGGCTC), synthesized by Eurofins MWG Operon. Reaction buffer is 20 mM Tris-HCl, pH 8.0, 5mM DTT, 0.01% Triton X-100. Methyltransferase activity assays for DOT1L is performed using Filter-plates. Reaction mixtures in 20 mM Tris-HCl, pH 8.0, 5 mM DTT, 2 mM MgCl2 and 0.01% Triton X-100 are incubated at room temperature for 1h, 100 μL 10% TCA is added, mixed and transferred to filter-plate. Plates are centrifuged at 2000 rpm for 2 min followed by 2 additional 10% TCA wash and one ethanol wash (180 μL) followed by centrifugation. Plates are dried and 100 μL MicroO is added and centrifuged. 70 μL MicroO is added and CPM are measured using Topcount plate reader.
|In vitro||Ethanol||50 mg/mL (87.75 mM)|
|DMSO||20 mg/mL (35.1 mM)|
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