SX-682 是口服有效的CXCR1和CXCR2变构抑制剂，可以阻断肿瘤髓系抑制细胞募集并增强 T 细胞活化和抗肿瘤免疫，具有治疗去势抵抗性前列腺癌的潜力。 Information SX-682 SX-682 is an orally bioavailable small-molecule allosteric inhibitor of CXCR1 and CXCR2 that blocks tumor MDSC recruitment and enhances T cell activation and antitumor immunity. Targets CXCR1 ; CXCR2 In vivo Whole tumor accumulation of CXCL1 in vivo in MOC1 and LLC tumors is significantly greater than oral mucosa and normal lung, respectively, and not diminished with SX-682 treatment. Plasma accumulation of CXCL1 is greater in tumor-bearing mice compared with naive for both models and increases following SX-682 treatment. Treatment of mice bearing MOC1 or LLC tumors with SX-682 beginning 10 or 20 days after tumor initiation does not alter CXCR1 or CXCR2 expression on tumor cells in vivo. [2] Following in vivo SX-682 treatment, tumor PMN-MDSC expression of cell surface TGF-β or superoxide dismutase 1/2 genes, responsible for the generation of H 2 O 2 , is not significantly altered. [3]