PHLDA1 (pleckstrin homology like domain family A member 1) is a multifunctional protein that primarily regulates apoptosis and cellular stress responses across diverse tissue types. The protein functions as a pro-apoptotic regulator in some contexts, as demonstrated by its ability to increase basal apoptosis and enhance sensitivity to chemotherapeutic agents like doxorubicin in melanoma cells 1. However, PHLDA1 also exhibits protective functions, particularly in maintaining tissue integrity. In intestinal epithelial cells, PHLDA1 protects against inflammatory bowel disease by interacting with MCL1 to prevent its ubiquitin-proteasome degradation, thereby reducing epithelial cell apoptosis and preserving intestinal barrier function 2. Similarly, in cardiac tissue, PHLDA1 functions downstream of FGF10/FGFR2b signaling to activate the AKT pathway, providing cardioprotection against doxorubicin-induced toxicity 3. The protein's expression is dysregulated in various diseases, being downregulated in metastatic melanoma, non-alcoholic fatty liver disease, and colorectal cancer 145. In neuroblastoma, PHLDA1 upregulation following antibody treatment may promote differentiation and enhance therapeutic responses 6. These findings suggest PHLDA1 functions as a context-dependent regulator of cell survival and tissue homeostasis.