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In vitro: GDC-0084 has excellent human metabolic stability in microsomal and hepatocyte incubations and demonstrated inhibition of pAKT, a key signal within the PI3K pathway, in normal brain tissue. GDC-0084 is shown to inhibit the proliferation of several glioma cells in vitro with IC50 ranging from 0.3 to 1.1 μM. GDC-0084 binding to plasma proteins is low, with a free fraction (%) of 29.5±2.7 (n=3) in CD-1 mouse plasma, when tested at 5 μM. Binding to brain tissues from CD-1 mice is higher, with a free fraction of 6.7% (±1; n=3).
In vivo: GDC-0084 markedly inhibits the PI3K pathway in mouse brain, causing up to 90% suppression of the pAkt signal. GDC-0084 achieves significant tumor growth inhibition of 70% and 40% against the U87 and GS2 orthotopic models, respectively. GDC-0084 distribution throughout the brain and intracranial tumors leads to potent inhibition of the PI3K pathway. It is being evaluated in patients, and exposures reached at tolerated doses are consistent with those associated with efficacious doses in mouse models.
| Cell Experiment | |
|---|---|
| Cell lines | Darby canine kidney (MDCK) cells （MDR1-MDCKI cells） |
| Preparation method | For transport studies, cells are seeded on 24-well Millicell plates 4 days prior to use(polyethylene terephtalate membrane, 1 μm pore size) at a seeding density of 1.3×105 cells/ml). GDC-0084 is tested at 5 μM in the apical-tobasolateral (A-B) and basolateral-to-apical (B-A) directions. The compound is dissolved in transport buffer consisting of Hanks' balanced salt solution with 10 mM HEPES. Lucifer Yellow is used as the paracellular and monolayer integrity marker. GDC-0084 concentrations in the donor and receiving compartments are determined by liquid chromatography-tandem mass spectrometry (LC-MS/MS) analysis. The apparent permeability (Papp), in the apical to A-B and B-A directions, is calculated after 2-hour incubation. |
| Concentrations | 5 μM |
| Incubation time | 2 h |
| Animal Experiment | |
|---|---|
| Animal models | Male Sprague−Dawley rats or female CD-1 mice |
| Formulation | 60% PEG400/10% ethanol(i.v.) or 0.5% methylcellulose with 0.2% Tween 80（p.o.） |
| Dosages | 1 mg/kg（i.v.）;5 or 25 mg/kg(p.o.) |
| Administration | i.v. or p.o. |
| Molecular Weight | 382.42 |
| Formula | C18H22N8O2 |
| CAS Number | 1382979-44-3 |
| Solubility (25°C) | 8 mg/mL in DMSO |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
| Related PI3K Products |
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| RV-1729
RV-1729 is an inhibitor of the phosphatidylinositol 3-kinase-δ (PI3Kδ). |
| Vulolisib
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| Vps34-IN-4
Vps34-IN-4 is a potent, selective, and orally active inhibitor of VPS34. |
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