 However, in patients with increased apolipoprotein (APOE) e4 carriers, Bapineuzumab treatment is also accompanied by vasogenic edema, a cytotoxic condition where the blood brain barrier has been disrupted thereby affecting white matter from excess accumulation of fluid from capillaries in intracellular and extracellular spaces of the brain.In Phase III clinical trials, Bapineuzumab treatment is associated with reduced rate of accumulation of Aβ in the brain in APOE e4 patients, and no significant reduction of Aβ concentration in APOE e4 patients and non-APOE e4 patients.Therefore, Aβ plaque concentration was not reduced, and there is no significant clinical benefits in cognitive functioning.