Loss-of-function WRN leads to genomic instability, heterochromatin alterations, and cell growth defects, which contribute to WS pathogenesis (Li et al., 2016; Murfuni et al., 2012; Ren et al., 2017a; Ren et al., 2011; Seki et al., 2008; Shamanna et al., 2017; Zhang et al., 2015). This evidence concerns the gene WRN and Werner syndrome.