NewslettersImmune Regulation News SPP1 Macrophages Facilitate the Differentiation and Maturation of Regulatory T Cells in Tumor-Draining Lymph Nodes of Colorectal Cancer By Emily Salmini - June 19, 2026 0 1 SPP1+ macrophages established an immunosuppressive niche in colorectal cancer tumor-draining lymph nodes by promoting CD137+ Treg maturation via the SPP1-CD44-NF-κB1 axis. [Gut] Abstract