TNS1 and breast cancer: For example, overexpression of Matar25 (mammary tumor‐associated RNA 25, human ortholog LINC01271) in breast cancer has been proposed to augment the activity of its interaction partners, PurA and PurB, which are transcriptional co‐activators required for the expression of key cancer genes, including the epithelial–mesenchymal transition factor Tns1 (Tensin 1; Chang et al., 2020).