Cell proliferation assay
Cell Proliferation was measured using the MTT assay. NK-92
cells were plated onto 96-well plates at a cell density of 10,000
cells per well in 100 μL of complete MEM-alpha and allowed to
grow in a CO2 incubator for 12 h. The medium was then removed
and replaced by fresh medium containing different concentrations
of FAC (from 12 to 200 μg/mL) for 24 h, 48 h and 72 h. Cultures
were incubated in 100 μL of medium with 10 μL of 5 mg/mL MTT
solution for 4 h at 37 °C. The medium with MTT was removed, and
100 μL of DMSO was added to each well to dissolve the formazan.
Absorbance was read at 570 nm (630 nm as a reference) on a
microplate reader (BIORAD-Benchmark, California, USA).