Journal
NEUROPATHOLOGY
Volume 26, Issue 5, Pages 484-490Publisher
BLACKWELL PUBLISHING
DOI: 10.1111/j.1440-1789.2006.00666.x
Keywords
Alzheimer's disease; corticobasal degeneration; FTDP-17; Pick's disease; progressive supranuclear palsy; tau
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Filamentous tau deposits in neurons or glial cells are the hallmark lesions of neurodegenerative tauopathies, such as Alzheimer's disease, Pick's disease, corticobasal degeneration and progressive supranuclear palsy. Biochemical analyses of Sarkosyl-insoluble tau from brains with tauopathies have revealed that tau deposits in different diseases consisted of different tau isoforms (i.e., all six tau isoforms occur in Alzheimer's disease, four repeat tau isoforms occur in corticobasal degeneration or progressive supranuclear palsy, and three repeat tau isoforms occur in Pick's disease). The discovery of mutations in the tau gene in FTDP-17 has established that abnormalities in tau function or expression are sufficient to cause filamentous aggregation of hyperphosphorylated tau and neurodegeneration similar to that seen in sporadic tauopathies. Because the number of tau inclusions and their regional distribution correlate with clinical symptoms, inhibition of tau aggregation or filament formation in neurons or glial cells may prevent neurodegeneration. We have investigated the effects of 42 compounds belonging to nine different chemical classes on tau filament formation, and found that several phenothiazine and polyphenol compounds, and one porphyrin compound inhibit tau filament formation.
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