Ba et al. (2021) found that miR-9-5p binds to the 3′  UTR of HSP90AA1 mRNA and that miR-9-5p decreased HSP90AA1 protein expression. Furthermore, they indicated that knockdown of ZNRD1-AS inhibited gastric cancer cell proliferation and metastasis by targeting the miR-9-5p/HSP90AA1 axis. This evidence concerns the gene POLR1H and gastric cancer.