Cell proliferation analysis was performed using the Cell Counting Kit-8 CCK-8 (Tongren, China). Cells were plated in triplicates in 96-well plates at a final density of 20,000/well 10 hr posttransfection. At the point of 24, 48, and 72 h, 10 ul CCK-8 reagents were added to each well and further incubated for 2 h at 37°C. The number of viable cells was assessed by the optical density (OD) at 450 nm with a microplate spectrophotometer.
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