PMID- 10218629 OWN - NLM STAT- MEDLINE DCOM- 19990506 LR - 20190513 IS - 0022-3069 (Print) IS - 0022-3069 (Linking) VI - 58 IP - 4 DP - 1999 Apr TI - Tau pathology in a family with dementia and a P301L mutation in tau. PG - 335-45 AB - Familial forms of frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP-17) have recently been associated with coding region and intronic mutations in the tau gene. Here we report our findings on 2 affected siblings from a family with early-onset dementia, characterized by extensive tau pathology and a Pro to Leu mutation at codon 301 of tau. The proband, a 55-year-old woman, and her 63-year-old brother died after a progressive dementing illness clinically diagnosed as Alzheimer disease. Their mother, 2 sisters, maternal aunt and uncle, and several cousins were also affected. Autopsy in both cases revealed frontotemporal atrophy and degeneration of basal ganglia and substantia nigra. Sequencing of exon 10 of the tau gene revealed a C to T transition at codon 301, resulting in a Pro to Leu substitution. Widespread neuronal and glial inclusions, neuropil threads, and astrocytic plaques similar to those seen in corticobasal degeneration were labeled with a battery of antibodies to phosphorylation-dependent and phosphorylation-independent epitopes spanning the entire tau sequence. Isolated tau filaments had the morphology of narrow twisted ribbons. Sarkosyl-insoluble tau exhibited 2 major bands of 64 and 68 kDa and a minor 72 kDa band, similar to the pattern seen in a familial tauopathy associated with an intronic tau mutation. These pathological tau bands predominantly contained the subset of tau isoforms with 4 microtubule-binding repeats selectively affected by the P301L missense mutation. Our findings emphasize the phenotypic and genetic heterogeneity of tauopathies and highlight intriguing links between FTDP-17 and other neurodegenerative diseases. FAU - Mirra, S S AU - Mirra SS AD - Department of Pathology, State University of New York, Health Science Center at Brooklyn, 11203, USA. FAU - Murrell, J R AU - Murrell JR FAU - Gearing, M AU - Gearing M FAU - Spillantini, M G AU - Spillantini MG FAU - Goedert, M AU - Goedert M FAU - Crowther, R A AU - Crowther RA FAU - Levey, A I AU - Levey AI FAU - Jones, R AU - Jones R FAU - Green, J AU - Green J FAU - Shoffner, J M AU - Shoffner JM FAU - Wainer, B H AU - Wainer BH FAU - Schmidt, M L AU - Schmidt ML FAU - Trojanowski, J Q AU - Trojanowski JQ FAU - Ghetti, B AU - Ghetti B LA - eng GR - AG10124/AG/NIA NIH HHS/United States GR - AG10130/AG/NIA NIH HHS/United States GR - AG10133/AG/NIA NIH HHS/United States GR - etc. PT - Case Reports PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - England TA - J Neuropathol Exp Neurol JT - Journal of neuropathology and experimental neurology JID - 2985192R RN - 0 (DNA Probes) RN - 0 (Epitopes) RN - 0 (tau Proteins) SB - IM MH - Atrophy MH - Blotting, Western MH - Canada MH - DNA Mutational Analysis MH - DNA Probes MH - Dementia/*genetics/pathology MH - Epitopes/genetics MH - Family Health MH - Female MH - France MH - Frontal Lobe/pathology MH - Humans MH - Male MH - Microscopy, Electron MH - Middle Aged MH - Neurofibrillary Tangles/chemistry/ultrastructure MH - Neurons/*chemistry/*pathology MH - Parietal Lobe/pathology MH - Parkinson Disease/genetics/pathology MH - Pedigree MH - *Point Mutation MH - Polymerase Chain Reaction MH - Restriction Mapping MH - Solubility MH - Temporal Lobe/pathology MH - tau Proteins/analysis/*genetics EDAT- 1999/04/28 00:00 MHDA- 1999/04/28 00:01 CRDT- 1999/04/28 00:00 PHST- 1999/04/28 00:00 [pubmed] PHST- 1999/04/28 00:01 [medline] PHST- 1999/04/28 00:00 [entrez] AID - 10.1097/00005072-199904000-00004 [doi] PST - ppublish SO - J Neuropathol Exp Neurol. 1999 Apr;58(4):335-45. doi: 10.1097/00005072-199904000-00004.