CXCL9 and neoplasm: We found that when neutrophils were co-cultured with cisplatin-pretreated tumor cells, they expressed significantly higher levels of chemokines, such as CXCL9, CXCL10, and CXCL11 (Figure 4A), which could be key regulators of recruitment of T cells into tumor tissues (Muller et al., 2010).