Fig. 9.

Anti-Αβ antibody injections result in an increase in MHC-II immunohistochemistry 3 d after injection. Data are expressed as percentage area occupied by MHC-II-positive staining in the injected hemisphere. The three bars indicate MHC-II expression in the untreated (None) group and the vehicle (VEH) and anti-HIV antibody (Cont-Ab) groups at 72 hr. The line shows the amount of MHC-II staining at 4, 24, 72, and 168 hr survival times. Increased MHC-II staining was observed in the frontal cortex (A) and hippocampus (B) at 72 hr compared with 4, 24, and 168 hr and both control groups (**p < 0.01).