BMN-673 (Talazoparib)

Catalog No.S7048 Batch:S704810

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Technical Data

Formula

 

C19H14F2N6O
 
Molecular Weight 380.35 CAS No. 1207456-01-6
Solubility (25°C)* In vitro DMSO 76 mg/mL (199.81 mM)
Water Insoluble
Ethanol Insoluble
In vivo (Add solvents to the product individually and in order)
Homogeneous suspension
CMC-NA
≥5mg/ml Taking the 1 mL working solution as an example, add 5 mg of this product to 1 ml of CMC-Na solution, mix evenly to obtain a homogeneous suspension with a final concentration of 5 mg/ml.
Clear solution
5%DMSO 95% Corn oil

Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.

 0.625mg/ml (1.64mM) Taking the 1 mL working solution as an example, add 50 μL of 12.5 mg/mL clear DMSO stock solution to 950 μL of corn oil and mix evenly. The mixed solution should be used immediately for optimal results. 
Clear solution
5%DMSO 40%PEG 300 5%Tween80 50% ddH2O

Validated by Selleck labs. Should you need adjustments to this formulation, contact our sales team for custom testing.

 2.500mg/ml (6.57mM) Taking the 1 mL working solution as an example, add 50 μL of 50 mg/mL clarified DMSO stock solution to 400 μL PEG300, mix evenly to clarify; add 50 μL Tween-80 to the above system, mix evenly to clarify; Then continue to add 500 μL ddH2O to adjust the volume to 1 mL. The mixed solution should be used immediately for optimal results. 
* <1 mg/ml means slightly soluble or insoluble.
* Please note that Selleck tests the solubility of all compounds in-house, and the actual solubility may differ slightly from published values. This is normal and is due to slight batch-to-batch variations.
* Room temperature shipping (Stability testing shows this product can be shipped without any cooling measures.)

Preparing Stock Solutions

Biological Activity

Description Talazoparib (BMN 673, LT-673) is a novel PARP inhibitor with IC50 of 0.57 nM for PARP1 in a cell-free assay. It is also a potent inhibitor of PARP-2, but does not inhibit PARG and is highly sensitive to PTEN mutation. Phase 3.
Targets
PARP1 [1]
(Cell-free assay)
0.57 nM
In vitro

BMN-673 selectively binds to PARP and prevents PARP-mediated DNA repair of single strand DNA breaks via the base-excision repair pathway. This enhances the accumulation of DNA strand breaks, promotes genomic instability and eventually leads to apoptosis. BMN 673 selectively kills cancer cells with BRCA-1 or BRCA-2 mutations. BMN 673 demonstrates single-agent cytotoxicityin BRCA-1 mutant (MX-1, IC50 = 0.3 nM) and BRCA-2 mutant cells (Capan-1, IC50 = 5 nM). In contrast, in MRC-5 normal human fibroblastand other tumor cell lines with wild-type BRCA-1 and BRCA-2 genes, IC50 of BMN 673 ranges between 90 nM and 1.9 μM.

Off-target molecular screening did not identify significant non-specific activity for this class of PARP inhibitors.

In vivo

In rat pharmacokinetic studies, BMN 673 displays >50% oralbioavailability and pharmacokinetic properties that enable singledaily dosing. In MX-1 xenograft tumor model studies, daily oral dosingof BMN 673 significantly enhances the antitumor effects ofcytotoxic therapies in a dose-dependent manner.

Features Most potent and selective PARPi reported thus far.

Protocol (from reference)

Cell Assay:

[3]
  • Cell lines

    MDA-MB-436 cells

  • Concentrations

    10 uM

  • Incubation Time

    7 days

  • Method

    Cells were treated with increasing doses of talazoparib for 7 days and subjected to cell viability assays to derive IC50 values.
Animal Study:

[2]
  • Animal Models

    MX-1 model (BRCA-1 deficient)

  • Dosages

    0.33 mg/kg/day, once daily

  • Administration

    Oral

References

  • http://www.selleckchem.com/products/bmn-673.html
  • http://cancerres.aacrjournals.org/cgi/content/meeting_abstract/70/8_MeetingAbstracts/3514
  • https://pubmed.ncbi.nlm.nih.gov/31015319/

Customer Product Validation

<p>Western blot assessment of effects on PAR, PARP, and dsDNA breaks mediated by IMMU-132 plus PARPi in TNBC tumor lines. Cells were plated overnight in 6-well plates before the addition of chemotherapeutics. After a 24-hour incubation, cells were harvested and cell lysates resolved and transferred for Western analysis as described in Materials and Methods. PAR and FL-PARP levels were determined on the same gel. Assessment of dsDNA breaks (p-H2A.X) was calculated as ratios relative to untreated control (Unt) normalized to b-actin protein loading control (Dp-H2A.X). B, HCC1806 cells exposed to rucaparib (Ruc) and IMMU-132 or to (C) talazoparib (Tala) and IMMU-132.</p>

, , Clin Cancer Res, 2017, 23(13):3405-3415

DNA damage persists on withdrawal of PARPi in RNASEH2AKO cells. Wild-type and RNASEH2AKO HeLa cells were treated with talazoparib and released into fresh medium for the indicated times before being processed for γ-H2AX immunofluorescence and propidium iodide (PI) staining. The γ-H2AX immunofluorescence (pseudocolor plots) and cell cycle (histograms) FACS profiles shown are representative of three biologically independent experiments.

Data from [ , , Nature, 2018, 559(7713):285-289 ]

MDA-MDA-MB-231 and BT549 cells were treated with 10 μM olaparib or 10 nM talazoparib for 24 hours, and subjected to immunoblotting with the indicated antibodies. PD-L1 knockout (K/O) cells were included as a negative control.

Data from [ , , Clin Cancer Res, 2017, 23(14):3711-3720 ]

PARP inhibition prevents adhesion to and migration of monocytes across BMVEC monolayers preserving the barrier. Primary human monocytes were treated for 24 h with PARPi (AIQ, olaparib, EB47, talazoparib), calcein-labeled, washed, and then added to BMVEC monolayers (untreated or treated for 24 h with TNFα). Treatments were removed prior to the addition of monocytes. Adhesion to (a) and migration of (b) monocytes across blood-brain barrier models were measured and are presented as fold difference compared to TNFα-only control (mean ± SEM) for each treatment from at least quadruplicate determinations, which was assigned a value of 1 (7600 relative fluorescent units for adhesion or equivalent to 37 migrated cells). *P < 0.05, **P < 0.01 indicate significance vs. non-treated. TEER, an indicator of barrier integrity, was continuously measured in BMVEC monolayers treated with or without TNFα following the addition of primary human monocytes that had been treated with PARPi.

Data from [ , , J Neuroinflammation, 2016, 13(1):254. ]

Selleck's BMN-673 (Talazoparib) Has Been Cited by 282 Publications

Jab1 regulates HRR mRNA stability to modulate PARP inhibitor sensitivity in triple-negative breast cancer [ Mol Cancer, 2025, 24(1):217] PubMed: 40819058
EXO1 as a therapeutic target for Fanconi Anaemia, ZRSR2 and BRCA1-A complex deficient cancers [ Nat Commun, 2025, 16(1):8476] PubMed: 41006228
Autocrine interferon poisoning mediates ADAR1-dependent synthetic lethality in BRCA1/2-mutant cancers [ Nat Commun, 2025, 16(1):6972] PubMed: 40730818
A cancer persistent DNA repair circuit driven by MDM2, MDM4 (MDMX), and mutant p53 for recruitment of MDC1 and 53BP1 on chromatin [ Nucleic Acids Res, 2025, 53(13)gkaf627] PubMed: 40626562
The inflammasome sensor NLRP3 interacts with REV7 to maintain genome integrity through homologous recombination [ Nucleic Acids Res, 2025, 53(12)gkaf554] PubMed: 40613708
Combined MEK and PARP inhibition enhances radiation response in rectal cancer [ Cell Rep Med, 2025, 6(8):102284] PubMed: 40782795
Targeting CDK12/13 Drives Mitotic Arrest to Overcome Resistance to KRASG12C Inhibitors [ Cancer Res, 2025, 10.1158/0008-5472.CAN-25-0450] PubMed: 41165466
PARP inhibitor-induced anti-tumour chemokine response is suppressed by dipeptidyl peptidase 4 (DPP4) in ovarian cancer [ Br J Cancer, 2025, 10.1038/s41416-025-03076-4] PubMed: 40579444
BCL2 drives castration resistance in castration-sensitive prostate cancer by orchestrating reciprocal crosstalk between oncogenic pathways [ Cell Rep, 2025, 44(6):115779] PubMed: 40448998
Low dose DNA methyltransferase inhibitors potentiate PARP inhibitors in homologous recombination repair deficient tumors [ Breast Cancer Res, 2025, 27(1):8] PubMed: 39819384

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SHIPPING AND STORAGE
Selleck products are transported at room temperature. If you receive the product at room temperature, please rest assured, the Selleck Quality Inspection Department has conducted experiments to verify that the normal temperature placement of one month will not affect the biological activity of powder products. After collecting, please store the product according to the requirements described in the datasheet. Most Selleck products are stable under the recommended conditions.

NOT FOR HUMAN, VETERINARY DIAGNOSTIC OR THERAPEUTIC USE.