In breast cancer cell lines, TMPO-AS1 has been found to sponge for miR-4731-5p (Wang et al., 2021), miR-140-5p (Zhu et al., 2021) and miR-1179 (Ning et al., 2021) and up-regulate oncogenic targets of these miRNAs. The gene discussed is TMPO; the disease is breast cancer.