Figure 3

Dose response of a) exemestane and b) testosterone in H23 and A549 cells. Different doses of exemestane or testosterone were applied on H23 and A549 cells and 48 h later, the number of cells was estimated with the colorimetric MTT assay. Results are expressed as mean ± SEM of the number of cells from at least three independent experiments performed in triplicates. Asterisks denote a statistically significant difference (unpaired t-test) compared to untreated cells. **P < 0.01 and ***P < 0.001.