| Assay Method Information | |
| | Enzyme Assay |
| Description: | The aim of this study was to evaluate TK-112690 in vivo as an inhibitor of uridine phosphorylase (UPase) enzyme activity. The range of TK-112690 doses studied for ability to prevent metabolic breakdown of uridine, through the in vitro inhibition of mouse and human small intestinal UPase enzyme, was 0, 0.1, 0.5, 1, 5, 10, 50, 100, 500, 1000, 5000 and 10000 uM). Detection of UPase activity was determined by HPLC analysis using UV detection of uracil concentration (UPase catabolizes uridine into uracil and ribose-1-phosphate).The UPase enzyme material was prepared from homogenized mouse and human being small intestinal tissue. TK-112690 was dissolved in water (50 mg/ml) and analyzed for UPase inhibition in aqueous solution containing 5 mM uridine, 0.01 M Tris, 0.01 M phosphate, 1 mM EDTA, and 1 mM DTT. Reactions were performed at 37 C. at pH of 7.3.TK-11260 inhibition of mouse and human UPase was analyzed by reverse phase HPLC using UV detection. |
| Affinity data for this assay | |
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