Apitolisib (GDC-0980; GNE 390; RG 7422) is a potent, highly selective, oral, dual inhibitor of class I PI3K and mTOR. Apitolisib (GDC-0980) demonstrates broad preclinical activity in breast, ovarian, lung, and prostate cancer models. Apitolisib (GDC-0980) can potently inhibit for isoforms of p110 including p110-alpha, p110-beta, p110-gamma and p110-delta. The IC50 value for inhibition of p110-alpha, p110-beta, p110-gamma and p110-delta by GDC-0980 is 5 nM,27 nM,7 nM and 14 nM. Besides the inhibition of Phosphoinositide 3-kinase, GDC-0980 also show strong inhibition to mTOR, which is a downstream target of akt but not only in PI3K signaling pathway. The Ki value for mTOR is 17 nM.
|Source||Biochem Biophys Res Commun (2014). Figure 3. GDC-0980|
|Cell Lines||PANC-1 cells and Capan-1 cells|
|Incubation Time||24 h|
|Results||Western blotting results in Fig. 1B showed clearly that GDC-0980 (1 μM) dramatically inhibited phosphorylation of AKT (Ser-473 and Thr-308) and S6K1 (Thr-389) in both PANC-1 cells and Capan-1 cells.|
|Cell lines||NSCLS cell lines, colon cancer cell lines and etc.|
|Preparation method||Cell viability assays Three hundred and eighty-four–well plates were seeded with 2,000 cells/well in a volume of 54 μL per well followed by incubation at 37°C under 5% CO2 overnight (∼16 hours). Compounds were diluted in dimethyl sulfoxide to generate the desired stock concentrations then added in a volume of 6 μL per well. All treatments were tested in quadruplicate. After 4 days incubation, relative numbers of viable cells were estimated using CellTiter-Glo (Promega) and total luminescence was measured on a Wallac Multilabel Reader (PerkinElmer). The concentration of drug resulting in 50% inhibition of cell viability (IC50) or 50% maximal effective concentration (EC50) was determined using Prism software (GraphPad). For cell lines that failed to achieve an IC50 the highest concentration tested (20 μmol/L) is listed.|
|Incubation time||4 days|
|Animal models||MCF7-neo/HER2 tumor-bearing mice|
|Formulation||0.5% methylcellulose with 0.2% Tween-80|
|Solubility (25°C)||DMSO 15 mg/mL|
Powder -20°C 3 years ; 4°C 2 years
In solvent -80°C 6 months ; -20°C 1 month
|Body Surface Area (m2)||0.007||0.025||0.15||0.05||0.02||0.5|
|Animal A (mg/kg) = Animal B (mg/kg) multiplied by||Animal B Km|
|Animal A Km|
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
 Salphati et al. Drug Metab Dispos. Preclinical Assessment of the Absorption and Disposition of the Phosphatidylinositol 3-Kinase/Mammalian Target of Rapamycin Inhibitor GDC-0980 and Prediction of Its Pharmacokinetics and Efficacy in Human.
 Sutherlin et al. J Med Chem. Discovery of a potent, selective, and orally available class I phosphatidylinositol 3-kinase (PI3K)/mammalian target of rapamycin (mTOR) kinase inhibitor (GDC-0980) for the treatment of cancer.
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