One of the genes induced by iron chelators is N-myc downstream regulated gene (NDRG1), which is a well-known metastasis suppressor in various cancer cell types (Le and Richardson, 2004; Kovacevic and Richardson, 2006; Yu et al., 2007; Ellen et al., 2008; Shi et al., 2013; Fang et al., 2014; Lane et al., 2014; Menezes et al., 2017; Park et al., 2020b; Park et al., 2020c; Ito et al., 2020). Here, NDRG1 is linked to cancer.