TGFB1 and pemphigus foliaceus: The current pathogenesis of PF presumably includes abnormal accumulation of TGF-β, cell recruitment, apoptosis, inflammatory factors, oxidative stress, and the imbalance of matrix metalloproteinase/tissue inhibitor of metalloproteinase (MMP/TIMP) (Ryu et al., 2014; Spagnolo et al., 2021) (Figure 2).