Gene expression analysis of CD11b+ sorted cells in wild type (WT) and fractalkine receptor deletion (CX3CR1−/−) non-injured (sham) mice. (A, B) Compared with WT sham, CX3CR1−/− sham mice had higher interleukin (IL) 1β and tumor necrosis factor (TNF) α messenger RNA expression. (C, D) No differences between genotypes were detected for sham expression of insulin-like growth factor 1 (IGF1) and IL10. Data are expressed as fold of induction, compared with the WT sham group, and are reported as mean ± standard deviation (n = 8). ***p < 0.001, Mann Whitney t-test.