SULF2 (sulfatase 2) is an extracellular endoglucosamine-6-sulfatase that removes sulfate groups from the C-6 position of glucosamine within heparan sulfate proteoglycans (HSPGs) 123. This enzymatic activity enables SULF2 to regulate multiple receptor tyrosine kinase (RTK) signaling pathways by modifying HSPG-dependent growth factor availability in the extracellular matrix. SULF2 demonstrates critical roles in tissue development and homeostasis, with differential expression patterns during chondrogenesis and osteogenesis 4. The enzyme shows enriched expression in hypertrophic chondrocytes and differentiating osteoblasts compared to quiescent cells 4. In pathological contexts, SULF2 exhibits significant oncogenic properties across multiple cancer types. It promotes tumor growth through activation of PDGFRα signaling in glioblastoma 5 and modulates glypican-3/β-catenin signaling in hepatocellular carcinoma 6. Cancer-associated fibroblasts secrete SULF2, contributing to immune exhaustion and therapy resistance 6. Additionally, SULF2 participates in vasculoprotective mechanisms as part of a PPARγ-p53 transcriptional complex responding to DNA damage in pulmonary endothelial cells 7. The enzyme's expression serves as a prognostic biomarker in various malignancies, with elevated levels correlating with poor patient outcomes 8.