TCS7010 (Aurora A Inhibitor I) is a novel, potent, and selective inhibitor of Aurora A with IC50 of 3.4 nM in a cell-free assay. It is 1000-fold more selective for Aurora A than Aurora B.

Aurora B:3.4 μM, Aurora A:3.4 nM

Auroras A and B Inhibition Assays: Both Auroras A and B are assayed in ELISA format using a GST fusion (pGEX-4T) of the N-terminus of Histone H3 (aa 1?18) as substrate. Plates are coated with 2 μg/mL substrate in PBS then blocked with 1 mg/mL I-block in PBS. Kinase reactions are run for 40 min with 5 ng/mL (0.16 nM) Aurora A or 45 ng/mL (1.1 nM) Aurora B at 30 μM ATP (~ Km) in kinase buffer. Final DMSO concentration is 4%. Product is detected by incubation with antiphosphohistone H3 (Ser10) 6 g3 mouse monoclonal antibody and sheep-anti-mouse HRP conjugate, followed by washing and addition of TMB substrate. After quenching with 1 M phosphoric acid, plates are read at 450 nM.

Cells are seeded in 384-well plates on day 0 in 50 μL of complete medium and incubated overnight in a 5% CO2 atmosphere at 37 °C. On day 1, 10 μL of Aurora A Inhibitor I is added. On day 4, plates are allowed to reach room temperature, and 30 μL Cell Titer-Glo reagent is added to each well to measure total ATP levels. Plates are read after shaking 15 min at room temperature.(Only for Reference)

Aurora A Inhibitor I

DMSO: 125 mg/mL (212.56 mM), Sonication is recommended.

10% DMSO+90% Saline: 10 mg/mL (17 mM), Suspension.

10% DMSO+90% Corn Oil: 2.5 mg/mL (4.25 mM), Sonication is recommended.