TGFB1 and pemphigus foliaceus: Similarly, in the present study, we found that the expression of IFN-γ and its related STAT3 was increased in TGF-β1-induced EMT cells (Fig. S3), and the IFN-γ level was also increased in the BLM-induced lung tissues, suggesting the deleterious role of IFN-γ in PF.