TEAD4 is a transcription factor that functions as a key effector of the Hippo signaling pathway, regulating cell proliferation, migration, and epithelial-mesenchymal transition (EMT) through interactions with YAP and TAZ coactivators 1. TEAD4 binds specific DNA enhancer elements (5'-GTGGAATGT-3') to activate target gene transcription [UniProt]. Mechanistically, TEAD4 partners with dephosphorylated YAP following cellular stress signals, forming nuclear condensates that compartmentalize transcriptional machinery for efficient gene activation 12. In disease contexts, TEAD4 drives metastatic progression in multiple cancer types, including bladder and non-small cell lung cancer, by promoting EMT via PI3K/AKT signaling and activating NRP1 expression 34. TEAD4 also contributes to radiation resistance in lung cancer and chemoresistance in cancer stem cells 45. Beyond cancer, TEAD4/TAZ complexes regulate fibroblast transformation and pulmonary fibrosis progression by controlling iron homeostasis through TFRC transcription 6. Additionally, TEAD4 coordinates with YAP to repress ACADL expression in response to extracellular matrix stiffness in hepatocellular carcinoma, regulating lipid metabolism reprogramming 7. These findings establish TEAD4 as a critical hub in multiple pathological processes, suggesting therapeutic potential as a prognostic biomarker and treatment target across cancer and fibrotic diseases.