product name CPI-169
Description: CPI-169 is a potent, and selective EZH2 inhibitor with IC50 of 0.24 nM, 0.51 nM, and 6.1 nM for EZH2 WT, EZH2 Y641N, and EZH1, respectively. CPI-169 was shown to inhibit tumor growth in a NHL xenograft model, reducing global H3K27me3.1 It has also been shown to synergize with the B-cell lymphoma inhibitor, ABT-199, to suppress the growth of NHL cell lines.
References: Chem Biol. 2014 Nov 20;21(11):1463-75.
528.66
Formula
C27H36N4O5S
CAS No.
1450655-76-1
Storage
-20℃ for 3 years in powder form
-80℃ for 2 years in solvent
Solubility (In vitro)
DMSO: 100 mg/mL (189.1 mM)
Water: <1 mg/mL
Ethanol: 100 mg/mL (189.1 mM)
Solubility (In vivo)
10% DMSO+60% PEG 400+30% ddH2O: 30mg/mL
Synonyms
other peoduct :
| In Vitro |
In vitro activity: In KARPAS-422 cells, CPI-169 shows a dose-dependent inhibitory effect on cell viability, and produces synergy anti-proliferative activity when used in combination with ABT-199. In 16 out of 25 NHL cell lines, CPI-169 also suppresses cell growth with GI50 of <5 μM. Kinase Assay: Compound potency is also assessed through incorporation of 3H-SAM into a biotinylated H3 peptide. Specifically, PRC2 containing either EZH1 (160 pM), wt EZH2 (40 pM), or Y641N mutant EZH2 (80 pM, both EZH2 prepared in-house) is pre-incubated with 3H-SAM (0.9 µM), 2 µM H3K27me3 activating peptide (H2N-RKQLATKAAR(Kme3)SAPATGGVKKP-amide) and compounds (as 10 point duplicate dose response titrations) for 120 min in a buffer consisting of 50 mM Tris (pH 8.5), 1 mM DTT, 0.07 mM Brij-35, 0.1% BSA, and 0.8% DMSO in a total volume of 12.5 µl in a black 384 well plate. Reaction is initiated with biotinylated H3 substrate peptides (H3K27me1 for wt EZH2, H3K27me2 for Y641N mutant EZH2; H2N-RKQLATKAAR(Kmen)SAPATGGVKKP-NTPEGBiot) as a 2 µM stock in 12.5 µL and allowed to react at room temperature for 5 h. Quenching is accomplished by addition of 20 µl of STOP solution (50 mM Tris (pH 8.5), 200 mM EDTA, 2 mM SAH). 35 µL of the quenched solution is transferred to Streptavidin Flashplates, incubated overnight, washed, and read in a TopCount Reader. For titrations all compound dilutions are in DMSO, final DMSO concentrations are 0.8% (v/v), and turnover is kept to less than < 5%. IC50s are calculated using non-linear least square four parameter fits (GraphPad 6.0). Cell Assay: Relative cell numbers are assessed by Cell Titer-Glo (CTG) luminescent cell viability assay using an Envision instrument. GraphPad Prism 6.0 is used for curve fitting, IC50/GI50 and Hill coefficient (H) calculations. The GI90 is calculated using the formula: EC90 = (90 /100-90)1/H * EC50. Cell line: 25 NHL cell lines |
|---|---|
| In Vivo | In mice bearing KARPAS-422 xenografts, CPI-169 (200 mg/kg, s.c.) effectively suppresses H3K27me3 levels and results in lymphoma tumor regression without affecting body weight or causing any overt adverse effects. |
| Animal model | Mice bearing KARPAS-422 subcutaneous xenografts |
| Formulation & Dosage | Dissolved in 10% DMSO + 60% polytheylene glycol 400 + 30% ddH2O; 200 mg/kg; s.c. injection |
| References | Chem Biol. 2014 Nov 20;21(11):1463-75. |
