RWPE-2 cells were seeded into a 96-well plate following transfection with miRNA-1297 inhibitor for 24 or 48 h. Next, 200 µl medium was added to each well, with 10 µl freshly prepared MTT (5 mg/ml) and 100 µl dissolved formazan liquid (dissolved in PBS). Subsequently, the optical density (OD) at 490 nm of each well was measured. The ratio of viable cells was calculated by dividing OD readings of the transfected groups into the control group.
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