CXCL1 and central nervous system cancer: The genes of the next chemokines, CXCL1,-2,-3,-5,-6,-8, have a very similar expression pattern (Figure 5k–m and Supplementary Figure S1), which includes a very restricted subpopulation of glioma cells, pericytes, and myeloid cells (among the latter, CXCL2,-3,-8 are highly expressed).