2010; Jansson and Lund 2012; Shah et al. 2012). In both cases, the target mRNA is inactivated/silenced (Jansson and Lund 2012). A single miRNA can have multiple mRNA targets (Teiten et al. 2010; Jansson and Lund 2012; Shah et al. 2012). There are several miRNAs that target BMI1 in various cancer types (miRNA‐ 218, 215, 200b, 200c, 128, 15a/b, 708, 16) (Bhattacharya et al. 2009; Saini et al. 2011; He et al. 2012; Liu et al. 2012; Sun et al. 2012; Guo et al. 2014; Jin et al. 2014; Yu et al. 2014; Jones et al. 2015). Here, BMI1 is linked to cancer.