Tau filament formation and associative memory deficit in aged mice expressing mutant (R406W) human tau

Yoshitaka Tatebayashi, Tomohiro Miyasaka, De Hua Chui, Takumi Akagi, Ken Ichi Mishima, Katsunori Iwasaki, Michihiro Fujiwara, Kentaro Tanemura, Miyuki Murayama, Koichi Ishiguro, Emmanuel Planel, Shinji Sato, Tsutomu Hashikawa, Akihiko Takashima

Research output: Contribution to journalArticlepeer-review

218 Citations (Scopus)

Abstract

The R406W tau mutation found in frontotemporal dementia and parkinsonism linked to chromosome 17 (FTDP-17) causes a hereditary tauopathy clinically resembling Alzheimer's disease. Expression of modest levels of the longest human tau isoform with this mutation under the control of the α-calcium-calmodulin-dependent kinase-II promoter in transgenic (Tg) mice resulted in the development of congophilic hyperphosphorylated tau inclusions in forebrain neurons. These inclusions appeared as early as 18 months of age. As with human cases, tau inclusions were composed of both mutant and endogenous wild-type tau, and were associated with microtubule disruption and flame-shaped transformations of the affected neurons. Straight tau filaments were recovered from Sarkosyl-insoluble fractions from only the aged Tg brains. Behaviorally, aged Tg mice had associative memory impairment without obvious sensorimotor deficits. Therefore, these mice that exhibit a phenotype mimicking R406W FTDP-17 provide an animal model for investigating the adverse properties associated with this mutation, which might potentially recapitulate some etiological events in Alzheimer's disease.

Original languageEnglish
Pages (from-to)13896-13901
Number of pages6
JournalProceedings of the National Academy of Sciences of the United States of America
Volume99
Issue number21
DOIs
Publication statusPublished - 2002 Oct 15

ASJC Scopus subject areas

  • General

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