Figure 8.
Effect of the APOE ɛ4 allele on microglial phenotype. Numbers of total microglia (A), IBA1+MHC2− microglia (B), and IBA1−MHC2+ microglia (D) did not differ between APOE ɛ4 carriers and noncarriers. Only for IBA1+MHC2+ microglia (C) were numbers significantly higher in APOE ɛ4 carriers, compared with noncarriers. Counts in each case are not density measures, but estimates of the number of cells per 1 cm-long full-width cortex from a single section of temporal isocortex. Data are expressed as individual values with means ± SEM. ∗P < 0.01.