Cell viability was assessed with CCK-8 assay
After recovery, SKOV3 cells were incubated with media plus cell counting kit-8 (CCK-8) solution at 37°C for 4 hours. The OD values of cancer cells were detected at a wavelength of 450 nm. CCK-8 solution with culture media but without cancer cells was used as blank. Cell viability values equalled to [OD (treatment) - OD (blank)] / [OD (control) – OD (blank)] X 100%.