Although these studies have not examined directly whether therapeutic delivery of miR-200 results in EMT inhibition or reversal, a recent study revealed that nanoparticle delivery of miR-506, a miRNA that prevents TGFβ-induced EMT by targeting Slug, effectively suppresses tumor growth and blocks EMT in two ovarian cancer models (Yang et al., 2013). Here, TGFB1 is linked to ovarian cancer.