SGI-1776 free base
Molecular Weight(MW): 405.42
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. Phase 1.
Cited by 7 Publications
3 Customer Reviews
VCaP cells were steroid starved overnight then treated with 10nM R1881 and PIM kinase inhibitor SGI-1776 as indicated for 4 hours. Total protein lysates were analyzed by Western blot with antibodies against P-AR S213, AR (total), P-4EBP1 Thr 37/46, and tubulin.
Oncogene 2013 32(34), 3992-4000. SGI-1776 free base purchased from Selleck.
Mean IL-8 concentrations determined by ELISA of the supernatants of HeLa cells infected with wild-type Salmonella. Kinase inhibitors are indicated on the x axis, and the target families of the inhibitors are indicated above each column. CEC, chelerythrine; Pim Inh, Pim-1 inhibitor 2. Inhibitors that significantly affected IL-8 production relative to the control (P < 0.05, Bonferroni post hoc test from one-way ANOVA) are indicated with an asterisk. Relative cell viability is also shown, as determined by reduction of XTT by viable cells. A450, absorbance at 450 nm.
Sci Signal 2011 4, rs9. SGI-1776 free base purchased from Selleck.
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Choose Selective Pim Inhibitors
|Description||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. Phase 1.|
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. 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.  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. 
|In vivo||Consistent with cell line data, xenograft model studies with mice bearing MV-4-11 tumors shows efficacy with SGI-1776.  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. |
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 vitro||DMSO||81 mg/mL (199.79 mM)|
|Ethanol||81 mg/mL (199.79 mM)|
|In vivo||Add solvents individually and in order:
30% propylene glycol, 5% Tween 80, 65% D5W
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Clinical Trial Information
|NCT Number||Recruitment||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT01239108||Withdrawn||Relapsed/Refractory Leukemias||Astex Pharmaceuticals||October 2010||Phase 1|
|NCT00848601||Terminated||Prostate Cancer|Non-Hodgkins Lymphoma||Astex Pharmaceuticals||February 2009||Phase 1|
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