BV prevented forkhead box A2 (FOXA2)-regulating mucin 5AC (MUC5AC) expression in IL-13-treated A549 cells not only through inhibiting Akt activation but also by suppressing enhanced SAM-pointed domain containing Ets-like factor (SPDEF), which demonstrated that BV could help prevent mucus metaplasia in asthma (Kim et al., 2021d). This evidence concerns the gene MUC5AC and asthma.