RAC1 and VASP expression levels following knockdown. (A) Expression level of VASP mRNA in VASP-shRNA MCF-7 cells, compared with NC-shRNA MCF-7 cells. *P<0.05. (B) Protein expression level of VASP protein in VASP-shRNA MCF-7 cells, compared with NC-shRNA MCF-7 cells. (C) Quantitative analysis of expression levels of VASP protein in panel (B). *P<0.05 compared with the control group. (D) Expression levels of VASP and RAC1 mRNA in RAC1-shRNA MCF-7 cells, compared with NC-shRNA MCF-7 cells. *P<0.05. (E) Protein expression level of VASP and RAC1 protein in RAC1-shRNA MCF-7 cells, compared with NC-shRNA MCF-7 cells. (F) Quantitative analysis of expression levels of VASP and RAC1 protein in panel (E). *P<0.05 compared with the control group. RAC1, Ras-related C3 botulinum toxin substrate 1; VASP, vasodilator-stimulated phosphoprotein; NC, negative control; shRNA, short hairpin RNA.