In Vitro Drug Validation to Assay Ion Channel Function in Cancer Cells

To begin, plate the cells in 75 microliters per well of antibiotic-free medium without HEPES buffer to determine the IC50. On the second day, prepare the control solution and the test solutions by performing serial dilutions of high-concentration stock solutions. After adding control and test solutions to the cells, incubate the cells at 37 degrees Celsius and 5%carbon dioxide in a humidified environment for 48 hours.

Begin the cell proliferation assay by first vortexing the MTS reagent to fully dissolve any precipitated reagent before usage on day three of the experiment transfer the thawed MTS reagents into a sterile, 25-milliliter reagent reservoir. Pipette 20 microliters of MTS reagent into each well of the 96-well plate containing samples and 100 microliters of culture medium. Incubate the plate at 37 degrees Celsius and 5%carbon dioxide in a humidified environment for one to four hours.

Then, centrifuge the plate at room temperature to remove any bubbles that may interfere with the absorbance reading. Measure the absorbance at 490 nanometers with a microplate reader or spectrophotometer. A 96-well plate showing the calorimetric results of an MTS assay with increasing drug concentrations is presented.

The dose response curve showed that the test agent impairs the viability of the cancer cells in a dose-dependent manner.