| Assay Method Information | |
| | In Vitro Enzyme Activity Test of the Compounds of the Present Disclosure |
| Description: | The IC50 value was determined using 33P isotope-labeled kinase activity test (Reaction Biology Corp) to evaluate the inhibitory ability of the compounds to be tested on human FGFR1, FGFR2 and VEGFR2.Buffer conditions: 20 mM Hepes (pH 7.5), 10 mM MgCl2, 1 mM EGTA, 0.02% Brij35, 0.02 mg/mL BSA, 0.1 mM Na3VO4, 2 mM DTT, 1% DMSO.Test steps: At room temperature, the compounds to be tested were dissolved in DMSO to prepare a 10 mM solution for use. The substrate was dissolved in the newly-prepared buffer, and the kinase to be tested was added thereto and mixed well. The DMSO solution in which the compounds to be tested were dissolved was added to the above-mentioned homogeneous reaction mixture using acoustic technology (Echo 550). The compound concentration in the reaction mixture was 10 μM, 2.50 μM, 0.62 μM, 0.156 μM, 39.1 nM, 9.8 nM, 2.4 nM, 0.61 nM, 0.15 nM, 0.038 nM or 3 μM, 1 μM, 0.333 μM, 0.111 μM, 37.0 nM, 12.3 nM, 4.12 nM, 1.37 nM, 0.457 nM, 0.152 nM. After incubating for 15 minutes, 33P-ATP (activity: 0.01 μCi/μL, with corresponding concentration listed in Table 4) was added to the reaction mixture to start the reaction. FGFR1, FGFR2, KDR and the concentration information in the reaction mixture were listed in Table 4. After the reaction was carried out at room temperature for 120 minutes, the reaction mixture was spotted on P81 ion exchange filter paper (Whatman #3698-915). After the filter paper was repeatedly washed with 0.75% phosphoric acid solution, the radioactivity of the phosphorylated substrate remaining on the filter paper was measured. The kinase activity data was expressed by comparing the kinase activity of the groups containing the compounds to be tested with that of the blank group (containing only DMSO). |
| Affinity data for this assay | |
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