“…miR-15 was identified for the first time in 2002, together with miR-16, as a potential oncomiR in the pathogenesis of chronic lymphocytic leukemia (CLL), being frequently deleted and/or downregulated in this malignancy [ 112 ]. Recently, Yang et al performed a meta-analysis to assess the prognostic value of miR-15a in human cancers [ 113 ], confirming that this miRNA is frequently downregulated, in particular in NSCLC [ 114 ]. Moreover, miR-15a has been found to regulate epithelial-to-mesenchymal transition (EMT) by silencing Twist1 [ 115 ], a key regulator of this process, together with Slug, which has a relevant role in lung carcinogenesis [ 116 ].…”