Although Lef1 has a binding site in its 3′‐UTR to miR‐26a‐5p and its mRNA expression appeared to be boosted by the introduction of miR‐26a‐5p inhibitor into the AF and NP cells, we did not found that the transfection of miR‐26a‐5p had significant effects on Lef1 expression (Figure 5E,F). Here, LEF1 is linked to atrial fibrillation.