CAVIN1 (caveolae-associated protein 1) is an essential core component of the CAVIN complex required for caveolae biogenesis in all tissues 1. It functions as a master regulator of caveolae formation by enabling recruitment of the CAVIN complex to the plasma membrane in cooperation with caveolin-1 1. Beyond structural roles, CAVIN1 participates in ribosomal RNA transcription by promoting transcriptional activity in adipocytes and regulating RNA polymerase I dynamics 1. Recent evidence demonstrates CAVIN1 mediates hERG potassium channel trafficking from the plasma membrane to cytoskeletal compartments, regulating cardiac repolarization and contributing to interindividual variability in drug-induced QT prolongation 2. CAVIN1 exhibits higher expression in type 2 skeletal muscle fibers 3. Germline CAVIN1 mutations cause congenital generalized lipodystrophy type 4 (CGL4), characterized by near-total adipose tissue loss, muscular dystrophy with elevated creatine kinase, and rippling muscle disease manifestations 45. Patients develop hyperphagic behavior, insulin resistance, hepatic steatosis, and cardiac arrhythmias 5. CAVIN1 mutations are inherited autosomal recessively in rippling muscle disease 4. The pleiotropic effects reflect CAVIN1's broad tissue expression and roles in mechanosensing, stress response, and exosome secretion 1.