Wei et al. (2018) reported that BK affected TGF‐β1‐induced epithelial‐mesenchymal transition by upregulating the expression of Smad7 and downregulating that of pSmad3 in the TGF‐β/Smad pathway, probably as an effective therapy for proliferative vitreoretinopathy. This evidence concerns the gene SMAD7 and proliferative vitreoretinopathy.