Involvement of puromycin-sensitive aminopeptidase in proteolysis of tau protein in cultured cells, and attenuated proteolysis of frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP-17) mutant tau.

Abstract excerpt

In tauopathies, tau protein is hyperphosphorylated, ubiquitinated, and accumulated in the brain; however, the mechanisms underlying this accumulation remain unclear. To gain an understanding of the role of proteases in the metabolism of tau protein, in the present study we evaluated the effects of protease inhibitors in SH-SY5Y human neuroblastoma cells and COS-7 cells transfected with the tau gene. When cells...

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