Onder 3.1 Hoge Raad 8 juni 2018

The rat liver microsome sample (100 µ l), which was preserved at -80° C, was fused at 0° C and diluted with 0.7 ml of a cold potassium phosphate buffer (100 mM pH7.4). This was mixed with 0.8 ml of 50 mM EDTA (buffered with the aforementioned potassium phosphate buffer) and 0.4 ml of 100 mM dithiothreitol solution (buffered with the aforementioned potassium phosphate buffer), and the mixture was kept at 0° C. The microsome solution (1.675 ml) was mixed with 670 µ l of 25 mM NADPH (buffered with the aforementioned potassium phosphate buffer), and the solution was added to the solution of 0.5mM [3-14C]HMG-CoA (3mCi/mmol). A solution (5 µ l) of sodium salt of the test compound dissolved in potassium phosphate buffer was added to 45 µ l of the mixture. The resulting mixture was incubated at 37° C for 30 minutes and cooled. After termination of the reaction by addition of 10 µ l of 2N-HCL, the mixture was incubated again at 37 ° C for 15 minutes and then 30 µ l of this mixture was applied to thin-layer chromatography on silica gel of 0.5 mm in thickness (Merck AG, Art 5744). The chromatograms were developed in toluene/acetone (1/1) and the spot, whose Rf value was between 0.45 to 0.60, were scraped. The obtained products were put into a vial containing 10 ml of scintillator to measure specific radio-activity with a scintillation counter. The activities of the present compounds are shown in Table 4 as comparative data, based on the assumption that the activity of mevinolin (sodium salt) as the reference drug is 100.

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