SGPP1 (sphingosine-1-phosphate phosphatase 1) is a key enzyme that specifically dephosphorylates sphingosine-1-phosphate (S1P) to sphingosine, playing a critical role in sphingolipid metabolism and cellular homeostasis 1. The enzyme regulates the sphingolipid rheostat by controlling the balance between pro-apoptotic sphingosine and pro-survival S1P 2. Mechanistically, SGPP1 enables efficient recycling of sphingosine into ceramide synthesis pathways and modulates intracellular S1P levels that influence diverse cellular processes including apoptosis, lipid droplet formation, and stress responses 1. The enzyme demonstrates significant disease relevance across multiple pathologies. In cancer, SGPP1 functions as a tumor suppressor - its downregulation is associated with increased cell migration, invasion, and poor prognosis in gastric cancer 3 and colorectal cancer 4. Several microRNAs including miR-27a, miR-656-3p, and miR-133b target SGPP1, linking its expression to cancer progression 456. In metabolic disease, SGPP1 overexpression protects pancreatic beta-cells from lipotoxicity by enhancing lipid storage capacity and preventing oxidative stress 1. Clinically, SGPP1 expression serves as an independent prognostic factor for cancer survival and represents a potential therapeutic target for metabolic disorders and cancer treatment 35.