CXCL9 and neoplasm: To test CXCL9-induced T cell recruitment, a chemotaxis assay of splenocytes derived from tumor-bearing mice showed that CD8+ T cells were the major cell population that migrated in response to CXCL9 (figure 5F), indicating that CXCL9 can stimulate the recruitment of IFNγ-expressing CD8+ T cells.