TP53 and breast cancer: A total of six tumor suppressor miRNAs (miR-143, miR-145, miR-15, miR-16, miR-26a, and miR-34) have been shown to be upregulated by p53 in breast cancer (Sachdeva et al., 2009; Gao et al., 2013; Li et al., 2013; Janaki Ramaiah et al., 2014).