Talazoparib tosylate

Research use only, not for human use.

Talazoparib tosylate is a novel and potent PARP1/2 (n IC50: 0.57 nM for PARP1).

Talazoparib tosylate (BMN 673ts) is a novel, potent and orally available PARP1/2 inhibitor with an IC50 of 0.57 nM for PARP1.

Talazoparib is a potent PARP1/2 inhibitor (PARP1 IC50=0.57 nM), it has no effect on PARG activity at concentrations up to 1 μM. Talazoparib binds to PARP1 with a dissociation constant (KD) of 0.29 nM. Talazoparib inhibits PARP1 and -2 to a similar extent, with Kis of 1.20 and 0.85 nM, respectively. Talazoparib selectively targets tumor cells with BRCA1, BRCA2, or PTEN gene defects with 20- to more than 200-fold greater potency than existing PARP1/2 inhibitors. Talazoparib targets tumor cells with homologous recombination gene defects. Tumor models that are either BRCA1-deficient (MX-1 and SUM149) or BRCA2-deficient (Capan-1) are profoundly sensitive to Talazoparib. Talazoparib induces nuclear γ-H2AX foci at concentrations as low as 100 pM.

Talazoparib is readily orally bioavailable, with more than 40% absolute oral bioavailability in rats when dosed in carboxylmethyl cellulose. Oral administration of Talazoparib elicits remarkable antitumor activity; xenografted tumors that carry defects in DNA repair due to BRCA mutations or PTEN deficiency are profoundly sensitive to oral Talazoparib treatment at well-tolerated doses in mice. Synergistic or additive antitumor effects are also found when Talazoparib is combined with temozolomide, SN38, or platinum drugs.

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Cell Cycle/DNA Damage

PARP

PARP

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1373431-65-2

552.55

C26H22F2N6O4S

>98% (HPLC)

In Vitro:?DMSO : ≥ 108 mg/mL (195.46 mM) H2O : < 0.1 mg/mL (insoluble)

Cc1ccc(cc1)S(O)(=O)=O.Cn1ncnc1[C@@H]1[C@H](Nc2cc(F)cc3c2c1n[nH]c3=O)c1ccc(F)cc1

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(-20℃)

With Ice Pack

≥ 2 years