In vitro kinase assays

Recombinant Aurora A and B were expressed as NH2-terminal His6-tagged fusion proteins using a baculovirus expression system. Aurora A was purified by affinity chromatography using Ni-NTA agarose, and Aurora B was purified by ion exchange chromatography using CM Sepharose Fast Flow. 1 ng purified recombinant enzyme was added to a reaction cocktail containing 25 mM Tris-HCl, pH 7.5, 12.5 mM KCl, 2.5 mM NaF, 0.6 mM DTT, 6.25 mM MnCl2, 10 μM peptide substrate, 10 μM ATP for Aurora A or 5 μM ATP for Aurora B, and 0.2 μCi γ-[33P]ATP (specific activity ≥ 2,500 Ci/mmol), and was then incubated at RT for 60 mins. Reactions were stopped by addition of 20% phosphoric acid, and the products were captured on P30 nitrocellulose filters and assayed for incorporation of 33P with a BetaplateTM counter. No enzyme and no compound control values were used to determine the concentration of ZM 447439, which gave 50% inhibition of enzyme activity.

Cell lines

GEP-NET cell lines BON, QGP-1 and MIP-101

Preparation method

The solubility of this compound in DMSO is >10 mM. General tips for obtaining a higher concentration: Please warm the tube at 37 °C for 10 minutes and/or shake it in the ultrasonic bath for a while. Stock solution can be stored below -20 °C for several months.

Reaction Conditions

0 ~ 5 μM; 72 hrs

Applications

In BON, QGP-1 and MIP-101 cells, ZM 447439 time- and dose-dependently inhibited cell growth with IC50 values of 3 μM, 0.9 μM and 3 μM, respectively.

References:

[1]. Ditchfield C, Johnson VL, Tighe A, Ellston R, Haworth C, Johnson T, Mortlock A, Keen N, Taylor SS. Aurora B couples chromosome alignment with anaphase by targeting BubR1, Mad2, and Cenp-E to kinetochores. J Cell Biol. 2003 Apr 28;161(2):267-80.

[2]. Georgieva I, Koychev D, Wang Y, Holstein J, Hopfenmüller W, Zeitz M, Grabowski P. ZM447439, a novel promising aurora kinase inhibitor, provokes antiproliferative and proapoptotic effects alone and in combination with bio- and chemotherapeutic agents in gastroenteropancreatic neuroendocrine tumor cell lines. Neuroendocrinology. 2010;91(2):121-30.