Fig. 3: Downregulation of K-Ras mediates sulindac sulfide (SS)-induced inhibition of NIH/3T3 cell transformation.

A qRT-PCR analysis of H-Ras and K-Ras mRNA levels in transformed cells treated with 50 µM SS or vehicle control. B Immunoblot showing H-Ras and K-Ras protein levels in SS-treated and control cells. C Time-course immunoblot analysis of K-Ras expression at various stages during MCA/TPA-induced transformation. D Immunoblot detection of K-Ras expression in CRISPR/Cas9-edited K-Ras knockdown and wild-type NIH/3T3 cells. E Representative images of foci formation in wild-type and K-Ras knockdown cells under different treatment conditions (n = 5). F Quantification of foci per dish across groups. Significance levels were annotated as follows: P < 0.05 (*), P < 0.01 (**), P < 0.001 (***). Error bars represent mean ± s.d.