CCL5 and hepatocellular carcinoma: It has also been reported that NK cells produce X-C motif chemokine ligand 1 (XCL1), C-C motif ligand 5 (CCL5), and fms-like tyrosine kinase 3 (FLT3) to attract DCs in the HCC TME, thus promoting their antigen presenting function to T cells [39,67].