Fifteen days after inoculation, intraperitoneal injection of CXCL5 antibody, GM-CSF antibody or iNOS antagonist 1400 W dramatically reduced the accumulation of PMN-MDSCs in the bone marrow, lungs and primary tumour sites compared with IgG-negative control (Fig. 6b). The gene discussed is CXCL5; the disease is neoplasm.