Si-RNA mediated knockdown of RBFOX2 did not alter the level of inclusion of exons v8-v10 into CD44 mRNA in both non-transformed mammary epithelial cell line NMuMG and epithelial murine breast cancer cell line PY2T under normal conditions and TGF-β-treatment (Braeutigam et al., 2013). This evidence concerns the gene TGFB1 and breast cancer.