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3 protocols using iniparib

1

PARP Inhibitor Characterization Protocol

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Olaparib, AZD-2461, A-966492, niraparib, veliparib, rucaparib, talazoparib, and iniparib were obtained from Selleck and stock solutions (2 mM) were prepared in DMSO. Fluorescent Olaparib (fl-Ola) was obtained from Tocris and a stock solution (10 µM) was prepared in DMSO. The p18mer* DNA oligonucleotides and its complementary strand were obtained from IDT: p18mer: 5′-phosphate-5′-fluorescein-GGGTTGCGGCCGCTTGGG-3′. Nucleosome with overhanging ends of 7 and 11 bp was prepared using the Widom601 sequence as previously described40 (link). Wild-type PARP1 and PARP2 were expressed and purified as previously described41 (link),42 . Purification of HPF1 to homogeneity was performed essentially as previously described25 (link), with the slight modification of using a gradient for the nickel affinity column from 0 to 40% over 15 CV. The stability of HPF1 was evaluated using the Thermo Fisher Protein Thermal Shift kit according to manufacturer’s instructions.
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2

Synthesis and Characterization of Small Molecule Inhibitors

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YKL-5-124 (18 (link)), THZ531 (19 (link)) and THZ1 (4 (link)) were prepared by Dr. Nathanael Gray’s laboratory. JQ1 (20 (link)) was obtained from J. Qi, DFCI. RG-108, C646, UNC0638, GSK-J4, GSK343, SAHA, Iniparib, iBET726, iBET151, LDC000067, ZXH-03-026 were purchased from SelleckChem.
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3

Investigating DNA Repair Modulator Effects

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Trabectedin (Yondelis®) was manufactured by PharmaMar S.A. (Madrid, Spain). Veliparib, olaparib, and iniparib were purchased from Selleck Chemicals (Munich, Germany). Stock solutions of drugs were prepared in pure DMSO at the appropriate concentrations and stored at -20℃ until use. Propidium iodide (PI), 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT), and antibodies against α-tubulin (T5168) were obtained from Sigma (St. Louis, USA). Antibodies against FEN1 (ab17993), DNA Pol β (ab26343), XRCC1 (ab1838), FANCD2 (ab2187), and ATM (Y170) were obtained from Abcam (Cambridge, UK). Antibodies against DNA-PK (#4602) and BRCA1 (#9010) were obtained from Cell Signaling Technologies (Danvers, USA). Antibodies against PARP-1 (sc-7150) and XPD (sc-20696) were obtained from Santa Cruz Biotechnology (Santa Cruz, USA). Antibodies against γ-H2AX (05-636), PAR (#551813), XPF (MS-1381), and XPG (A301-484A) were obtained from Merck Millipore (Billerica, USA), BD Pharmigen (San Jose, USA), NeoMarkers (Fremont, USA), and Bethyl Lab (Montgomery, USA), respectively.
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