CXCR2 and cancer: To clarify the roles of CXCLs in the cancer-promoting effects of senescence-induced hPSCs, we used SB225002, a selective CXCR2 antagonist, and SCH-527123, a CXCR1/CXCR2 antagonist, to block the CXCLs/CXCR2 axis.