Molecular Weight(MW): 333.36
GSK1059615 is a dual inhibitor of PI3Kα/β/δ/γ (reversible) and mTOR with IC50 of 0.4 nM/0.6 nM/2 nM/5 nM and 12 nM, respectively. Phase 1.
5 Customer Reviews
The PI3K/AKT pathway significantly contributes to the ligand-driven HER2 signaling activities detected by CELx HSF tests. a and b SKBr3 cells were seeded in sensor plates and then treated with a serial titration of the PI3K/AKT pathway inhibitor GSK1059615 (0 nM to 810 nM) two hours prior to maximal stimulation with NRG1b (800 pM) (a) or EGF (600 pM) (b). CELx curves are displayed using Delta CI values to demonstrate the relative signals to the time point (arrow) when the stimulus (EGF or NRG1b) was added. Dose–response curves of GSK1059615 inhibition on NRG1b and EGF-driven HER2 signals are shown in the insets
BMC Cancer, 2017, 17(1):199. GSK1059615 purchased from Selleck.
For MTT assays, cells (2,000 ~ 5,000 cells/well) were subcultured into 96-well plates according to their growth properties. Cell proliferation was assayed at 72 hr after treatment of GSK1059615 by adding 20 μl of 5 mg/ml 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) solution per 100 μl of growth medium. After incubating for 3-4 h at 37°C, the media were removed and 150 µl/well of MTT solvent (either absolute DMSO or isopropanol containing 4 μM HCl and 0.1% Nonidet-40) was added to dissolve the formazan. The absorbance of each well was measured by ELx808 (BioTek, Winooski, VT) or Wallac Victor2 (Perkin-Elmer Life Sciences, Boston, MA) Microplate Reader. Viable cells are presented as percent of control, vehicle-treated cells.
Dr. Yong-Weon Yi from Georgetown University Medical Center. GSK1059615 purchased from Selleck.
We treated all of drugs in T47D which has a PI3KCA H1044R mutation with the concentration shown below for 1 hour and performed western blot analysis using antibodies to phospho-AKT(SERINE 472), and total AKT.
Saraswati Sukumar of Johns Hopkins University School of Medicine. GSK1059615 purchased from Selleck.
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Choose Selective PI3K Inhibitors
|Description||GSK1059615 is a dual inhibitor of PI3Kα/β/δ/γ (reversible) and mTOR with IC50 of 0.4 nM/0.6 nM/2 nM/5 nM and 12 nM, respectively. Phase 1.|
|Features||A novel, ATP-competitive, and reversible inhibitor of both PI3Kα, β, δ, and γ, and mTOR.|
The pyridinylquinoline derivative GSK1059615 is a novel, ATP-competitive, and reversible inhibitor of the class I family of PI3Ks. GSK1059615 inhibits PI3K signaling, induces G1 arrest and apoptosis, especially in breast tumor cells.  Data summarized in another review also shows that GSK1059615 inhibits PI3Kα, β, γ and δ, with Ki of 0.42 nM, 0.6 nM, 0.47 nM and 1.7 nM, respectively.  Another report shows that GSK1059615 inhibits PI3Kα with IC50 of 2 nM. In T47D and BT474 cancer cells, GSK1059615 inhibits the phosphorylation of Akt at S473, with IC50 of 40 nM. 
|In vivo||In xenograft mice models of BT474 or HCC1954 breast cancer cells, GSK1059615 (25 mg/kg) effectively inhibits tumor growth. |
HTRF In vitro Profiling Assays for PI3K Inhibition:The measurement of the GSK1059615-dependent inhibition of the PI3Ks is accessed using a HTRF based PI3K profiling assay kit. 400 pM enzyme is used in PI3Kα and δ assays, 200 pM in PI3Kβ assays, and 1 nM in PI3Kγ assay. In addition, the PI3Kα, β, and δ assays are run with 150 mM NaCl and 100 μM ATP, while the PI3Kγ assay is run with no NaCl and 15 μM ATP. All reactions are run at 10 μM PIP2. GSK1059615 is serially diluted (3-fold in DMSO), and 50 nL is transferred to a 384-well low-volume assay plate. PI3K Reaction Buffer is prepared by diluting the stock 1:4 with de-ionized water. Freshly prepared DTT is added at a final concentration of 5 mM on the day of use. Enzyme addition and GSK1059615 pre-incubation are initiated by the addition of 2.5 µL of PI3K in reaction buffer. Plates are incubated at room temperature for 15 min. Reactions are initiated by addition of 2.5 µL of 2× substrate solution (PIP2 and ATP in 1× reaction buffer). Plates are incubated at room temperature for one hour. Reactions are quenched by the addition of 2.5 µL of stop solution. The quenched reactions are then processed to detect product formation by adding 2.5 µL of Detection Solution. Following a 1-hour incubation in the dark, the HTRF signal is measured on the Envision plate reader set for 330nm excitation and dual emission detection at 620nm (Eu) and 665nm (APC). The IC50 value is then obtained.
|In vitro||DMSO||2 mg/mL (5.99 mM)|
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Clinical Trial Information
|NCT Number||Recruitment||Conditions||Sponsor/Collaborators||Start Date||Phases|
|NCT00695448||Terminated||Solid Tumours||GlaxoSmithKline||June 24 2008||Phase 1|
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