NFATC4 is a Ca2+-regulated transcription factor that functions as a key regulator of immune, cardiovascular, and neurological processes 1. In immune cells, NFATC4 is translocated from the cytoplasm to the nucleus upon calcineurin activation, where it binds DNA and cooperatively interacts with AP-1 proteins to promote transcription of cytokine genes including IL-2 and IL-4 1. Beyond immunity, NFATC4 plays critical roles in cardiac development and pathology. During physiological stress, NFATC4 nuclear accumulation drives pathological cardiac hypertrophy through the NFAT/MEF2 signaling pathway, a process regulated by interactions with scaffold proteins like KAP1 2. In hepatic tissue, NFATC4 activation accelerates non-alcoholic steatohepatitis by suppressing PPARα signaling and increasing osteopontin expression 3. Notably, NFATC4 exhibits context-dependent roles in cancer: it functions as a tumor suppressor in cutaneous squamous cell carcinoma, but promotes oncogenic processes in multiple malignancies including acute lymphoblastic leukemia and various epithelial cancers 456. Recent studies identify NFATC4 splicing regulation and RNA modifications as therapeutic targets in cardiac disease 7. These findings establish NFATC4 as a pleiotropic transcription factor with therapeutic potential across immune, metabolic, and malignant diseases.