CXCL8 and prostate cancer: At present, studies have confirmed that CXCL8 is highly expressed in thyroid tumors, ovarian cancer, liver cancer, prostate cancer and many other tumors, and its role is mainly reflected in: accelerating the growth of tumor cells, enhancing the motility of tumor cells, changing the local environment of tumors and inhibiting the immune system to play a role, and ultimately making tumor cells invade and metastasize in distant areas (Liu J. et al., 2016).