PMID- 12391602 OWN - NLM STAT- MEDLINE DCOM- 20021213 LR - 20101118 IS - 0360-4012 (Print) IS - 0360-4012 (Linking) VI - 70 IP - 3 DP - 2002 Nov 1 TI - Alzheimer's disease: beta-Amyloid protein and tau. PG - 392-401 AB - Research on the molecular pathogenesis of Alzheimer's disease (AD) has made great strides over the last decade. This progress is the result of protein chemical analysis of two extracellular and intracellular fibrillary lesions in AD brain conducted during the 1980s, which identified beta-amyloid protein (A beta) and tau as their major components, respectively. Linkage analysis of familial AD identified four responsible genes: three causative genes (beta-amyloid precursor protein, presenilin 1, and presenilin 2) and one susceptibility gene (apolipoprotein E epsilon 4). All those genes causing and predisposing to AD exhibit a common phenotype: an increased production of A beta 42, a longer, more amyloidogenic A beta species, and/or its enhanced deposition. This observation was substantiated when presenilins were shown to be directly involved in A beta production. Whereas A beta deposition is relatively specific for AD, tau deposition is observed in various neurodegenerative diseases and is assumed to be intimately associated with neuronal loss. The genetic analysis of frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP-17) revealed the presence of mutations in the tau gene in affected members. Thus, tau can lead to intracellular tau deposits and neuronal loss, although the mechanism remains to be clarified. Taken together, A beta might exert neurotoxicity through tau, leading to neuronal loss in the AD brain. CI - Copyright 2002 Wiley-Liss, Inc. FAU - Morishima-Kawashima, Maho AU - Morishima-Kawashima M AD - Department of Neuropathology, Faculty of Medicine, University of Tokyo, Tokyo, Japan. maho@m.u-tokyo.ac.jp FAU - Ihara, Yasuo AU - Ihara Y LA - eng PT - Journal Article PT - Review PL - United States TA - J Neurosci Res JT - Journal of neuroscience research JID - 7600111 RN - 0 (Amyloid beta-Peptides) RN - 0 (Amyloid beta-Protein Precursor) RN - 0 (Apolipoproteins E) RN - 0 (Membrane Proteins) RN - 0 (PSEN1 protein, human) RN - 0 (Presenilin-1) RN - 0 (tau Proteins) SB - IM MH - Alzheimer Disease/genetics/*metabolism/physiopathology MH - Amyloid beta-Peptides/genetics/*metabolism MH - Amyloid beta-Protein Precursor/biosynthesis/genetics MH - Animals MH - Apolipoproteins E/genetics/metabolism MH - Cell Death/*physiology MH - Chromosomes, Human, Pair 17/genetics MH - Humans MH - Membrane Proteins/deficiency/genetics MH - Mutation/genetics MH - Presenilin-1 MH - tau Proteins/genetics/*metabolism RF - 80 EDAT- 2002/10/23 04:00 MHDA- 2002/12/17 04:00 CRDT- 2002/10/23 04:00 PHST- 2002/10/23 04:00 [pubmed] PHST- 2002/12/17 04:00 [medline] PHST- 2002/10/23 04:00 [entrez] AID - 10.1002/jnr.10355 [doi] PST - ppublish SO - J Neurosci Res. 2002 Nov 1;70(3):392-401. doi: 10.1002/jnr.10355.