STING1 and pemphigus foliaceus: In a bleomycin (BLM)-induced pulmonary fibrosis (PF) mouse model, Wen et al. found that heterophyllin B inhibited fibroblast transformation by activating AMPK and suppressing TGF-β, reduced extracellular matrix (ECM) deposition by downregulating COL-1 and α-SMA, and decreased STING expression.