GDC-0032 is an orally bioavailable, potent and selective inhibitor of Class I PI3Kα, δ and γ isoforms, with 30 fold less inhibition of the PI3K β isoform relative to the PI3Kα isoform. GDC-0032 inhibits MCF7-neo/HER2 cells proliferation with IC50 of 2.5 nM. The combination of GDC-0032 with tamoxifen enhances the efficacy of tamoxifen in vivo (102%TGI for GDC-0032). GDC-0032 is currently in a phase I clinical trial.
| Molecular Weight | 460.53 |
| Formula | C24H28N8O2 |
| CAS Number | 1282512-48-4 |
| Solubility (25°C) | DMSO 10 mM |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
| Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
| Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
| Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
| Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
| 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.
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