ITGAM and Stroke: VPA treatment did not obviously reduce the number of CD11b-positive microglia/macrophages in sham group (Figures 4A,B,G) and on day 2 post-stroke (Figures 4C,D,G), but significantly decreased the CD11b-positive cell number in the peri-infarct zone at day 7 post-stroke (Figures 4E–G).