Several studies have demonstrated a connection linking the expression of microRNAs (miRNAs), the inhibition of FOXO3A, and the increased proliferation of cancer-derived cells: hepatocellular carcinoma (HCC)/miR-155 [38], HCC/miR-182-5p [39], and glioma/miR-155 [40]. This evidence concerns the gene FOXO3 and glioma.