Abstract
The syndrome of frontotemporal dementia represents a diverse group of diseases presenting with behavioral and cognitive disturbances. The expression of the microtubule-associated protein tau was studied in postmortem samples of frontal cortex of 19 cases (12 Pick's disease A, B, C; 4 dementia lacking distinct histology; 3 motor neuron disease type) by Western blotting with a phosphorylation-independent anti-tau antibody. The presence of tau protein was detected in all cases evaluated, including the 11 brains classified as frontotemporal lobe degeneration (diagnostic categories Pick's disease B, C and dementia lacking distinct histology). These findings indicate that the recently reported decreased expression of tau protein in frontotemporal lobe degeneration represents pathogenic mechanism of neurodegeneration detectable only in a special subset of these disorders.
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