CCL20 and neoplasm: Secondly, the CCL20-CCR6 axis was reported to primarily affect chemoattraction to immature dendritic cells (DCs), effector/memory T cells and B cells in the tumor immune microenvironment43, and the decrease of CCR6 in the PBK high expression group caused a decrease in DC infiltration which is consistent with the above results (Fig. 7I).