. A representative image of three different experiments is shown. Densitometric values (mean ± SD,*n *=* *0) relative to controls are shown below. The qPCR data show the relative mRNA expression of actin, which was used as a housekeeping gene. \**P *\<* *0.000 significant difference between resistant and control cells by two‐way ANOVA and Tukey\'s multiple comparisons test, 