AZD2461 is a novel PARP inhibitor with low affinity for Pgp than Olaparib. AZD2461 has an 80-fold increased Mdr1b expression on Olaparib-resistant KB1P tumor T6-28, without inhibition of Pgp. AZD2461 induces loss of 53BP1 expression in mice with KB1P tumors with short-term treatment. Long-term AZD2461 treatment is well tolerated and doubled the median relapse-free survival. Importantly, PARPi resistance was minimized by long-term treatment with the novel PARP inhibitor AZD2461, which is a poor P-glycoprotein substrate.
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Source | Cancer Res (2016). Figure 4. AZD2461 |
| Method | immunofluorescence | |
| Cell Lines | A549 cells | |
| Concentrations | 500 nmol/L | |
| Incubation Time | 1 hour | |
| Results | Unlike olaparib, which results in persistence of gH2AX following IR to the same degree as APLF knockdown, AZD2461 had no effect on gH2AX dynamics. |
| Molecular Weight | 395.43 |
| Formula | C22H22FN3O3 |
| CAS Number | 1174043-16-3 |
| Solubility (25°C) | DMSO 59 mg/mL |
| 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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