SGI-1776 free base Pim inhibitor

Cat.No.S2198

SGI-1776 free base is a novel ATP competitive inhibitor of Pim1 with IC50 of 7 nM in a cell-free assay, 50- and 10-fold selective versus Pim2 and Pim3, also potent to Flt3 and haspin. SGI-1776 induces apoptosis and autophagy.
SGI-1776 free base Pim inhibitor Chemical Structure

Chemical Structure

Molecular Weight: 405.42

Quality Control

Cell Culture, Treatment & Working Concentration

Cell Lines Assay Type Concentration Incubation Time Formulation Activity Description PMID
CHO cells Function assay Inhibition of human ERG expressed in CHO cells by automated patch clamp method, IC50=1 μM
Click to View More Cell Line Experimental Data

Chemical Information, Storage & Stability

Molecular Weight 405.42 Formula

C20H22F3N5O

Storage (From the date of receipt)
CAS No. 1025065-69-3 Download SDF Storage of Stock Solutions

Synonyms N/A Smiles CN1CCC(CC1)CNC2=NN3C(=NC=C3C4=CC(=CC=C4)OC(F)(F)F)C=C2

Solubility

In vitro
Batch:

DMSO : 81 mg/mL ( (199.79 mM) Moisture-absorbing DMSO reduces solubility. Please use fresh DMSO.)

Ethanol : 81 mg/mL

Water : Insoluble

Molarity Calculator

Mass Concentration Volume Molecular Weight

In vivo
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Mechanism of Action

Targets/IC50/Ki
Pim1 [1]
(Cell-free assay)
7 nM
FLT3 [1]
(Cell-free assay)
44 nM
Pim3 [1]
(Cell-free assay)
69 nM
Pim2 [1]
(Cell-free assay)
363 nM
In vitro

In addition to Pim, SGI-1776 also potently targets FLT3 (IC50 = 44nM). Treatment of AML cells with SGI-1776 results in a concentration-dependent induction of apoptosis. Importantly, SGI-1776 is also cytotoxic in AML primary cells, irrespective of FLT3 mutation status and results in Mcl-1 protein decline. [1]Treatment of CLL cells with SGI-1776 results in a concentration-dependent induction of apoptosis. SGI-1776 induces apoptosis in CLL and that the mechanism involves Mcl-1 reduction. Apoptosis induction coupled with the inhibition of RNA synthesis is observed in CLL cells treated with SGI-1776. [2] SGI-1776 exhibites cytotoxic activity in vitro with a median relative IC50 of 3.1 mM. SGI-1776 induces tumor growth inhibition meeting criteria for intermediate EFS T/C activity in 1 of 39 evaluable models. In contrast, SGI-1776 induces complete responses of subcutaneous MV4;11. [3]

Kinase Assay
Kinase Assays
Kinase inhibition is measured by the use of radiometric assays performed by KinaseProfiler service. Assays contain a peptide substrate, known purified recombinant human kinases, gamma-labeled ATP, magnesium ion, and a fixed concentration (1 μM) of SGI-1776. In a final reaction volume of 25 μL, 5 to 10 mU of Pim1/2/3 is incubated with 8 mM of MOPS, pH 7.0; 0.2 mM ethylene diamine tetraacetic acid; 100 μM KKRNRTLTV;10 mM MgAcetate; and [γ-32P-ATP] . The reaction is initiated by the addition of the MgATP mix. After incubation for 40 minutes at room temperature, the reaction is stopped by the addition of 5 μL of a 3% phosphoric acid solution. Then, 10 μL of the reaction is spotted onto a P30 filtermat and washed 3 times for 5 minutes in 75 mM phosphoric acid and once in methanol before it is dried and measured via a scintillation counter.
In vivo

Consistent with cell line data, xenograft model studies with mice bearing MV-4-11 tumors shows efficacy with SGI-1776. [1] SGI-1776 has shown preclinical activity against leukemia and solid tumor cell line models with IC50 values of 0.005–11.68 mM. SGI-1776 induces significant differences in EFS distribution in vivo in 9 of 31 solid tumor xenografts and in 1 of 8 of the evaluable ALL xenografts. [3]

References

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