Detection
of in vitro killing activity by CIK combined with L-OHP on OCUM-2MD3/L-OHP cells Groups (parent cells were set as controls for each group) L-OHP intervention group The in vitro killing activities of L-OHP applied alone at different concentrations against drug-resistant cells at 24 h, 48 h and 72 h were calculated. CIK cell intervention group The in vitro killing activities of CIK cells alone with different ratios of potency to target on drug-resistant cells were measured at click here 12 h, 24 h and 48 h. CIK cell plus L-OHP intervention group CIK cells with a ratio of potency to target of 40:1 were added for 12 h, and L-OHP at different concentrations was then added. The in vitro killing activities of combination of CIK and L-OHP applied in drug-resistant
cells were measured 24 h later. Detection of in vitro killing activity of L-OHP on drug-resistant cells The two cell types (each at a density of 1 × 106/ml) were collected and inoculated on 96-well plates (100 μl/well, 1 × 105 counts), and the drugs were added 24 h after cell adhesion. L-OHP solutions were added (100 μl/well at final concentrations of 600, 300, 150, 75, and 37.5 μl/ml). The same this website volume of culture medium was added in the control group, and all treatments were tested in triplicate. Cells were cultured at 37°C in a humidified incubator containing 5% CO2 for 24 h, 48 SCH727965 mw h or 72 h, and 20 μl of MTT (5 mg/L) was then added to cultures. Cells were cultured for 4 h then supernatants were discarded, and 150 μl of DMSO was added to each well. The absorbance value of each well was measured by an ELISA reader at a wavelength of 570 nm, and killing activity was calculated by the following
equation from which IC50 values were calculated: Killing activity (%) = (mean OD value in control group – mean OD value in experiment group) / (mean OD value in control group – mean OD value in blank control group) × 100% Detection of in vitro killing Metalloexopeptidase activity of CIK on drug-resistant cells The two cell types (each at a density of 1 × 106 cells/ml) were collected, inoculated in 96-well plates (100 μl/well, 1 × 105 cells), and CIK cells were added 24 h after cell adhesion. CIK cells at different ratios of mixture Effector to Target (40:1, 20:1, 10:1) were added to a 96-well plate (100 μl/well). The same volume of culture medium was added in the control group, and blank control wells were also used. All treatments were tested in triplicate, and cells were cultured at 37°C in a humidified incubator containing 5% CO2 for 24 h, 48 h and 72 h. OD values were obtained by MTT assay with an automatic ELISA reader at a wavelength of 570 nm. Detection of in vitro killing activity of CIK cells plus L-OHP on drug-resistant cells CIK cells were added at an E to T ratio of 40:1 for 12 h.