TGFB1 and breast carcinoma: The micro‐RNA 200 (miR‐200) gene family is actively repressed by ZEB1 in response to TGFβ signaling; miR‐200 pairs with the ZEB1 and TGFβ2 mRNAs and inhibits their translation, thus forming a double‐negative feedback loop that is critical for breast carcinoma EMT (Burk et al., 2008).