Figure 4: The phenotype of microglia was detected at 24 hours. Microglia were CD11b+ and M1 microglia were CD16/32+. Note: Red boxes in the first row represent the selected gates including microglias, and the regions with different colors represent the signals of different cell population. Red regions in the second row represent CD16/32+ cells, and the fourth quadrantal area represents the high signal. OGD: Oxygen and glucose deprivation; H2: hydrogen.