SKOV3 cells were seeded into a 96-well plate at a density of 5×104 cells/well and transfected as described above. At 48 h following transfection, 10 µl MTT solution (5 mg/ml, Sigma-Aldrich; Merck KGaA) was added to each well and incubated at 37°C for 4 h. Then, 100 µl solubilization solution [50% dimethylsulfoxide and 20% SDS (pH 4.8)] was added to each well followed by agitation for 10 min. The absorption values were measured at 570 nm.
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