CXCL5 and pancreatic neoplasm: CXCL5, known as a ligand for CXCR2, has been widely reported as an effective chemoattractant for MDSCs.[22] Further analysis of scRNA‐seq data for orthotopic pancreatic tumors of mice unveiled that cancer epithelial cells predominantly served as the primary producers of CXCL5 (Figure 6F).