Characterization A molecular features in iatroge Lead Investigator: Ignazio Cali Institution : Case Western Reserve University E-Mail : ixc20@case.edu Proposal ID : 937 Proposal Description: I would like to request frozen brain tissue of the frontal, temporal, occipital lobes, and cerebellum (~5 g for each region) from cases of late onset Alzheimer's disease (LOAD) without Lewy Body (N=5), and cases with pre-clinical Alzheimer's disease (N=5). LOAD should have cerebral amyloid angiopathy (CAA) without cerebral ischemic infarction. For each of the 10 cases I would like to know: 1) neuropathological data, including the Braak stage, the presence of neuritic plaques, and of neurofibrillary tangles 2) demographic data: age at onset, disease duration, sex, and race and 3) APOE polymorphism (possibly no APOE????4 alleles). Finally each case should not have a history of TBI.