PIAS3 and Miyoshi myopathy: To further demonstrate the specificity of miR‐18a binding to its predicted site in the PIAS3 3′UTR, shown in Fig. 5A, we compared the inhibition by miR‐18a mimics on a dual‐luciferase plasmid containing the human PIAS3 3′UTR with that on two control dual‐luciferase plasmids, an ‘empty’ plasmid with a minimal 3′UTR and a beta‐actin 3′UTR plasmid, in HEK293T cells and 211H MM cells.