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5 protocols using talazoparib

1

PARP Inhibitor Stock Preparation

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Olaparib (AZD2281; Selleckchem, Houston, TX, USA) and talazoparib (T6253; TargetMol, Wellesley Hills, MA, USA) were resuspended in DMSO at a concentration of 100 mM or 200 mM, respectively.
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2

Resuspension of PARP Inhibitors

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Olaparib (AZD2281; Selleckchem, Houston, TX, USA) and talazoparib (T6253; TargetMol, Wellesley Hills, MA, USA) were resuspended in DMSO at a concentration of 100 mM or 200 mM, respectively.
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3

Synergistic Effects of DOT1L and PARP Inhibitors

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DOT1L inhibitor SGC0946 and PARP inhibitors Olaparib, Niraparib, Veliparib, and Talazoparib were all purchased from TargetMol. For drug synergy studies, ovarian cancer cells (4000/well) were seeded in 96-well plates for overnight incubation and treated with different doses of inhibitors for 5 days. Cell viability was evaluated by measuring the 450 nm absorbance with the Cell Counting Kit-8 (CCK-8) (YEASEN, Shanghai, China). Each concentration was tested in triplicate. The IC50 value was calculated and performed in GraphPad Prism v8.0. Drug synergistic effects were calculated based on the CompuSyn software or SynergyFinder. CI < 1 indicated synergism, CI = 1 indicated additive effects, and CI > 1 indicated antagonism.
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4

Determining PARP Inhibitor IC50 Values

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To determine 50% inhibitory concentration (IC50) values of Olaparib (AZD2281; TargetMol, USA), Niraparib (MK-4827; TargetMol, USA), Veliparib (T2591; TargetMol, USA), and Talazoparib (T6523, TargetMol, USA), we measured the cell proliferation rate using Cell Counting Kit-8 (CCK-8) (YEASEN, Shanghai, China). IC50 values were analyzed using GraphPad Prism Version 8.0.
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5

Investigating Epigenetic and Transcriptional Regulation

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The following primary antibodies were used in the research: anti-Ki67, anti-phospho-γH2A, anti-DIMT1, anti-GAPDH, anti-NELF-E, anti-PARP1, anti-p65, anti-phospho-p65, anti-ubiquitin, anti-p21, (Cell Signaling Technology, USA). Anti-puromycin, anti-poly-ADP-ribose, (Merck Millipore, USA). Anti-RNA polymerase II, Anti-RNA polymerase II (phospho-S5), Anti-RNA polymerase II (phospho-S2), anti-RNF146, (Abcam, USA). anti-PARP1 (Active Motif, USA). Niraparib, PJ34, olaparib, and rucaparib were purchased from Selleck Chemicals (Houston, USA). Talazoparib was purchased from TargetMol (Boston, USA). 5,6-Dichlorobenzimidazole 1-β-D-ribofuranosylbenzimidazole (DRB) was purchased from APExBIO (Houston, USA).
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