Single MAPT knock-in mouse models of frontotemporal dementia for sharing with the neurodegenerative research community
Morito, T.; Kamano, N.; Qi, M.; Watamura, N.; Endo, T.; Benner, S.; Higuchi, M.; Shimojo, M.; Sahara, N.; Mizuma, H.; Hama, H.; Kurokawa, H.; Miyawaki, A.; Duff, K.; Foiani, M.; Sado, T. C.; Sasaguri, H.; Bez, S.
Show abstract
We recently reported development of human MAPT knock-in mice that carry single or double pathogenic mutations of frontotemporal dementia. However, it takes more than 14 months for the line with the most aggressive phenotypes to exhibit tau pathology without forming high-order tau oligomers, along with concomitant abnormal behavior. We thus generated MAPT knock-in mice carrying triple mutations, among which the MAPTP301S;Int10+3;S320F line exhibited robust pathology starting earlier than 6 months. Tau accumulation took place mainly in the thalamus, hypothalamus, amygdala and entorhinal cortex, but less so in the hippocampus, leading to synaptic loss, atrophy and behavioral abnormalities. Crossbreeding MAPTP301S;Int10+3;S320F with App knock-in mice AppNL-G-F resulted in the manifestation of tau pathology in the hippocampus and cortex. These mutant mice will be valuable tools for understanding the mechanisms of frontotemporal dementia, Alzheimers disease and other tauopathies.
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