Arvizo et al. (2013) also showed that 20 nm AuNPs reversed EMT by up‐regulating E‐Cadherin (E‐Cad), and down‐regulating Snail, N‐Cadherin, and Vimentin in three ovarian cancer cell lines (A2780, OVCAR5, and SKOV3‐ip). This evidence concerns the gene CDH1 and ovarian cancer.