ACT-1004-1239(Cat No.:I021330)is a potent, selective antagonist of the C-C chemokine receptor 7 (CCR7), a G protein–coupled receptor crucial for immune cell trafficking, lymph node homing, and adaptive immune responses. By blocking CCR7 signaling, ACT-1004-1239 disrupts chemokine-mediated migration of T cells and dendritic cells, modulating immune activation and inflammatory processes. It is a valuable research tool for studying CCR7’s role in immunity, cancer metastasis, and autoimmune disorders. ACT-1004-1239 holds therapeutic potential for treating inflammatory diseases, immunological imbalances, and cancers where CCR7-driven cell migration contributes to disease progression.