Figure 1. IC50 values of BRAFV600E mutated melanoma cells after exposure to vemurafenib (a) or AZD6244 (b).
The cells were treated for 120 hours (vemurafenib) or 72 hours (AZD6244). Cell viability was determined by MTS colorimetric assay. IC50 values (x-axis) are expressed in µM for vemurafenib or AZD6244. Black columns: Parental cell lines sensitive to vemurafenib. Gray columns: Sublines with in vitro acquired resistance to vemurafenib. Gray columns filled with coarse striped pattern: Cell lines derived from progressive lesions in patients treated with vemurafenib. White columns: vemurafenib primarily resistant cell lines. White column filled with coarse striped pattern: Cell line derived at baseline from a patient who did not respond clinically to vemurafenib.
