Cancer cells were first
counted, and approximately 4000 cells per well were seeded in a 96-well
cell culture plate (Corning Inc.). Then, after incubation at 37 °C
in a humidified atmosphere with 5% CO2 for 24 h, the culture
medium was replaced by a series of concentrations of drugs diluted
with the corresponding culture fluid. Five replicates were made for
each measurement, and the time of co-incubation was determined by
the efficiency of each drug. In this study, DOX (MedChemExpress Co.,
Ltd.) and CCM (Sinopharm Chemical Reagent Co., Ltd.) were co-incubated
with the cells for 24 h at 37 °C under the same conditions as
described above, whereas irinotecan hydrochloride injection (20 mg/mL,
Qilu Pharmaceutical), taxol (Aladdin), and oxaliplatin (Aladdin) were
co-incubated for 48 h. Finally, 10 μL of the CCK-8 reagent (MedChemExpress
Ltd.) was added into each well, and OD at 450 nm was measured using
a multifunction microplate reader (Infinite M200 Pro, Tecan) after
incubation for 2 h at 37 °C. The percentage each concentration
accounted for of the control was presented as cell viability. The
IC50 value was calculated using SPSS.
counted, and approximately 4000 cells per well were seeded in a 96-well
cell culture plate (Corning Inc.). Then, after incubation at 37 °C
in a humidified atmosphere with 5% CO2 for 24 h, the culture
medium was replaced by a series of concentrations of drugs diluted
with the corresponding culture fluid. Five replicates were made for
each measurement, and the time of co-incubation was determined by
the efficiency of each drug. In this study, DOX (MedChemExpress Co.,
Ltd.) and CCM (Sinopharm Chemical Reagent Co., Ltd.) were co-incubated
with the cells for 24 h at 37 °C under the same conditions as
described above, whereas irinotecan hydrochloride injection (20 mg/mL,
Qilu Pharmaceutical), taxol (Aladdin), and oxaliplatin (Aladdin) were
co-incubated for 48 h. Finally, 10 μL of the CCK-8 reagent (MedChemExpress
Ltd.) was added into each well, and OD at 450 nm was measured using
a multifunction microplate reader (Infinite M200 Pro, Tecan) after
incubation for 2 h at 37 °C. The percentage each concentration
accounted for of the control was presented as cell viability. The
IC50 value was calculated using SPSS.