CX3CR1 and ischemic stroke: However, the number of CD11bhigh and CX3CR1-double positive cells increased over time after ischemic stroke (% of CD11bhigh + CX3CR1: 2.88 ± 0.09 at 6 h, 2.43 ± 0.56 at day 1, 7.35 ± 0.94 at day 3, 12.66 ± 2.10 at day 7) (Fig. 2b).