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3 protocols using dinaciclib

1

High-throughput Assays for Cell Viability and Death

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OSMI-2 and OSMI-4 were synthesized in-house (10 (link)). AT7519, LDC000067, Palbociclib, RO3306 and
PHA848125 were purchased from Selleckchem. Staurosporine was purchased from
Abcam. Dinaciclib was from Axon Medchem. NVP2 and SB1317 were obtained from
MedChem Express. ATP levels in cells were assessed using the
CellTiter-Glo® Luminescent Cell Viability Assay (Promega). Colony-forming
assays were performed using the CytoSelect 384-well Cell Transformation Assay
(BioCat) according to manufacturer’s instructions. Growth rate and cell
death activation were evaluated using the Incucyte instrument according to
manufacturer’s instructions. For detection of cell death activation, we
used IncuCyte® Caspase-3/7 Green Reagent for Apoptosis (Essen
Biosciences). Cell death activation for Fig.
2E
and Suppl. Fig.
3
were performed using the ApoTox-Glo™ Triplex Assay (Promega)
according to the manufacturer’s instructions (the signal from caspase
activity was normalized to signal from viable cells). Cycloheximide (CHX) was
used as a positive control to induce cell death0. Knockdown experiments were
performed using RNAiMax reagent (Sigma). OGT targeting siRNAs were from
ThermoFisher Scientific: siOGT_1 s16094 and siOGT_2 s16095 and CDK9 targeting
siRNA was from Qiagen (SI00024423).
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2

Dose-Titration Experiments with Small-Molecule Inhibitors

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Drugs were purchased for commercial sources or synthesized in house, as follow. Dinaciclib: Axon Medchem. SNS-032: Bio Vision. MGH-CP1: Enamine. MYF-01-37, VT-103, VT-107, K-975, XAV939: MedChem Express. Mivebresib (ABBV-075): Selleck. JQ1: Tocris. XAV939: XcessBio. MSC-4106, VT02956, LATSi (NCGC00886782): in-house. 10 mM stock solutions in DMSO were used as the starting point for all the dose-titration experiments.
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3

Combinatorial Therapy Strategies in Cancer

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Different co-treatments or pre-treatment strategies were followed for each combined therapy. For liposomal doxorubicin and olaparib treatment, the cells were pre-treated for 6 h with 100 nM Dox-NP (Avanti®, Alabaster, AL, USA), followed by treatment for 60 h with 1 μM olaparib. For temozolomide (TMZ) (Sigma Aldrich, Taufkirchen, Germany) and olaparib co-treatment, the cells were pre-treated for 48 h with 50 μM temozolomide before co-treatment with 1 μM olaparib for 24 h. Single treatments with [125I]-PARPi-01 (~1 MBq/106 cells), olaparib (1 μM), dinaciclib (5 μM; Sigma), and talazoparib (10 nM; Axon Medchem, Groningen, Netherlands.) were done for 72 h, dinaciclib (5 μM), and 1 μM olaparib co-treatment was done for 72 h. For Dox-NP and [125I]-PARPi-01 combination, the cells were pre-treated with 100 nM Dox-NP 6 h prior to incubation with [125I]-PARPi-01 (~1MBq/106 cells) for 72 h. Untreated cells were incubated in growth medium supplemented with DMSO (≤0.2%) for 72 h.
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