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Iniparib (BSI-201) is a potent small-molecule Poly(ADP-ribose) polymerase (PARP1) inhibitor for cancer treatment. Poly(ADP-ribose) polymerase (PARP) is a critical DNA repair enzyme involved in DNA single-strand break repair via the base excision repair pathway. PARP1 is activated by DNA damage. BSI-201 was the first putative PARP inhibitor to commence phase III clinical trials. Iniparib (BSI-201) produces rapid apoptosis in various cancer cell lines with IC50 values ranging from 40-128 μM and is not toxic in Syrian hamsters at doses as high as 200 mg/kg. BSI-201 was well tolerated and there were no changes in blood counts at the end of treatment. Antitumor activity of Iniparib (BSI-201) was confirmed by Caspace-3 and TUNEL staining of OVCAR-3 tumors. The combination of Iniparib and topotecan produced significant antitumor activity (P<0.001) and increased the percentage of complete tumor regression compared with topotecan alone. In addition, PARP-1 inhibitor BSI-201 may exhibit direct antineoplastic activity against cancers defective in DNA repair.
| Molecular Weight | 292.03 |
| Formula | C7H5IN2O3 |
| CAS Number | 160003-66-7 |
| Solubility (25°C) | DMSO 50 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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