CCL2 and cancer: In various types of cancer, such as breast (69), prostate (70), colorectal (71), or pancreatic (72) cancer, CCL2 recruits immune cells to the tumor microenvironment, additionally acting on stromal and tumor cells to modulate angiogenesis, metastasis, and tumor cell proliferation (45, 69, 73–75), comprehensively reviewed in Borsig et al. (76) and Lim et al. (77).