The biochemical similarity between paired helical filament tau in AD and <i>MAPT</i> V337M predicts that the tau pathology associated with this mutation constitutes a compelling target for [<sup>18</sup>F]AV1451 imaging.
In a "combined" model, expressing both tau(V337M) and the familial amyloid precursor protein AD mutation APP(V717I) in a CT100 fragment, age-dependent tau phosphorylation occurred at the same sites and was significantly augmented compared to "single" tau(V337M) mice.
Conditional expression systems for 4-repeat wild-type (WT) tau or the corresponding mutants V337M and R406W were established in human neuroglioma H4 cells to study the effect of tau mutations on the physicochemical properties of tau, and to develop a cellular model for the formation of filamentous tau characteristic of frontotemporal dementia with parkinsonism linked to chromosome 17 (FTDP-17) and Alzheimer's disease.
The conclusion is that the type and distribution of tau deposits in HFTD1 and HFTD2, the physical structure of filaments, and tau isoform composition in HFTD1 differ from Alzheimer's disease and an FTDP-17 family with a V337M mutation in the tau gene.