Catalog No.S1087 Synonyms: NSC-746045, IND-71677
Molecular Weight(MW): 292.03
Iniparib (BSI-201) is a PARP1 inhibitor with demonstrated effectiveness in triple-negative breast cancer (TNBC). Phase 3.
Cited by 9 Publications
3 Customer Reviews
Immunoblot analysis of PARylation after treatment with various PARP inhibitors.The asterisk indicates a nonspecific band.
Nat Methods 2013 10(10), 981-4. Iniparib (BSI-201) purchased from Selleck.
Representative Western blot analysis and quantification of the mean intensity of the band of IKB phosphorylation (E) and caspase 3 activation (F) in Wt neurons incubated with TWEAK either alone or in combination with the PARP-1 inhibitor BSI-201.
Neuroscience 2010 171, 1256–1264. Iniparib (BSI-201) purchased from Selleck.
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|Description||Iniparib (BSI-201) is a PARP1 inhibitor with demonstrated effectiveness in triple-negative breast cancer (TNBC). Phase 3.|
BSI-201 is described as a prodrug of 4-iodo-3-nitrosobenzamide, an agent that covalently inhibits PARP1 by binding to its first zinc finger under cell-free conditions. Treatment of 120 μM BSI-201 plus buthionine sulfoximine (BSO) induces a 95% cell death among 855-2 cells, and displays a similar effect in other human cancer cells.  BSI-201 inhibits the growth of E-ras 20 cells, the effect of which can be augmented 4-fold when BOS is added.  Recently BSI-201 shows no ability to inhibit PARP enzymatic or cellular activity, but can non-selectively modify cysteine-containing proteins in tumor cells, suggesting the mechanism of action for BSI-201 is likely not via inhibition of PARP activity.  BSI-201 (100 μM) inhibits ionizing radiation-induced single-strand breaks (SSBs) repair in human lymphoid cell lines based on large endogenous Epstein–Barr virus (EBV) circular episomes assay, resulting in 55% repair by 2 hours, which can be reversed surprisingly by knockdown of PARP1, indicating that the mechanism of inhibition does not involve trapping PARP at SSBs.  BSI-201 is not able to selectively kill homologous recombination (HR)-deficient cells between BRCA2-deficient PEO1 and BRCA2-revertant PEO4, or ATM-deficient GM16666 and ATM-restored GM16667 fibroblasts. BSI-201 is cytotoxic to a variety of cell lines at concentrations above 40 μM reflecting a mechanism independent of PARP. 
-  Mendeleyev J, et al. Biochem Pharmacol, 1995, 50(5), 705-714.
-  Bauer PI, et al. Biochem Pharmacol, 2002, 63(3), 455-462.
-  Liu X, et al. Clin Cancer Res, 2012, 18(2), 510-523.
|In vitro||DMSO||58 mg/mL (198.6 mM)|
|Ethanol||28 mg/mL (95.88 mM)|
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