NFKB1 and cancer: More than two decades of intensive research showed the involvement of miRNAs in all the processes of cancer cell transformation, with miRNAs acting as oncomirs (e.g., miR-21 has oncogenic properties in many cancer types), tumor suppressors (e.g., the let-7 miRNA family, negatively regulated by NF-κB, represses cell growth), or with dual roles (e.g., miR-182) [31].