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Niraparib tosylate inhibits PARP1/PARP2 with IC50 of 3.8 nM/2.1 nM respectively. MK-4827 (Niraparib) inhibits PARP activity with EC50=4 nM and EC90=45 nM in a whole cell assay. MK-4827 inhibits proliferation of cancer cells with mutant BRCA-1 and BRCA-2 with CC50 in the 10−100 nM range.
MK-4827 is well tolerated in vivo and demonstrates efficacy as a single agent in a xenograft model of BRCA-1 deficient cancer. MK-4827 enhances radiation response of p53 mutant Calu-6 tumor in both cases, with the single daily dose of 50 mg/kg being more effective than 25 mg/kg given twice daily.
| Cell Experiment | |
|---|---|
| Cell lines | V-C8 cells |
| Preparation method | V-C8 (BRCA2-negative) Chinese hamster cells are treated with the PARP inhibitor MK-4827 for 24 h, washed and incubated in drug-free medium for 5-7 days until colonies formed. |
| Concentrations | 50 nM |
| Incubation time | 24 h |
| Animal Experiment | |
|---|---|
| Animal models | Female nude mice (Ncr Nu/Nu) |
| Formulation | Suspended in 0.5% Methocel in deionized water |
| Dosages | 25 or 50 mg/kg |
| Administration | p.o. |
| Molecular Weight | 492.59 |
| Formula | C19H20N4O.C7H8O3S |
| CAS Number | 1038915-73-9 |
| Solubility (25°C) | DMSO: ≥ 60 mg/mL |
| Storage |
Powder -20°C 3 years ; 4°C 2 years In solvent -80°C 6 months ; -20°C 1 month |
| Related PARP Products |
|---|
| ABT-888
ABT-888 (Veliparib) is a potent inhibitor of PARP-1 and PARP-2 with Ki values of 5.2nM and 2.9nM respectively. |
| AG-014699 phosphate
AG-014699 (PF-01367338, Rucaparib) is a PARP inhibitor with a Ki of 1.4 nM. |
| AG14361
AG14361 is a novel poly (ADP-ribose) polymerase-1 inhibitor with a GI50 of 10.9 µM. |
| AZD2281 (Olaparib)
AZD 2281 (Olaparib, KU-0059436) is a potent PARP (poly ADP-ribose polymerase) inhibitorwith IC50 of 5 and 1 nM for PARP-1and PARP-2 respectively. Olaparib is an autophagy and mitophagy activator. |
| Talazoparib
Talazoparib (BMN-673) is a highly potent, orally active PARP1/2 inhibitor.Talazoparib inhibits PARP1 and PARP2 enzyme activity with Kis of 1.2 nM and 0.87 nM, respectively. Talazoparib has antitumor activity. |
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