CCL5 and neoplasm: Besides, there are DCs attracted by CCL-5, CCL-19, CCL-20, CCL-21, and CXCL-12 chemokines which employ regulatory Tregs and CCR-7+ DC.CCL-17 and CCL-22 working on CCR-4 are capable of straightaway recruiting Th2 and Tregs for tumour progression and spread [94–96].