Fig. 9From: Targeting CXCR2 inhibits the progression of lung cancer and promotes therapeutic effect of cisplatinSchematic diagram of the mechanistic findings. CXCR2 showed potent chemotaxis on neutrophils. Tumor microenvironment was abundant in immunosuppressive cytokines, such as TGF-β and Arg-1, which induced polarization of neutrophils to pro-tumor N2 type and impaired anti-tumor immune response. SB225002, a selective inhibitor of CXCR2, could effectively inhibit neutrophils infiltration to tumor microenvironment. Cisplatin, a common chemotherapy agent for lung cancer, could induce up-regulation of immunosuppressive markers, such as TGF-β, IL-10, and PD-L1 in tumor cells, which might contribute to reduced anti-tumor effectBack to article page