@article{oai:repo.qst.go.jp:00047784,
 author = {Ono, Maiko and Sahara, Naruhiko and Kumata, Katsushi and Ji, Bin and Ni, Ruiqing and Koga, Shunsuke and W, Dickson Dennis and Q, Trojanowski John and M-Y, Lee Virginia and Yoshida, Mari and Hozumi, Isao and Yoshiyama, Yasumasa and C, van Swieten John and Nordberg, Agneta and Suhara, Tetsuya and Zhang, Ming-Rong and Higuchi, Makoto and 小野 麻衣子 and 佐原 成彦 and 熊田 勝志 and 季 斌 and 倪 遑伯 and 吉山 容正 and 須原 哲也 and 張 明栄 and 樋口 真人},
 issue = {3},
 journal = {Brain : a journal of neurology},
 month = {Jan},
 note = {Diverse neurodegenerative disorders are characterized by deposition of tau fibrils composed of conformers (i.e. strains) unique to each illness. The development of tau imaging agents has enabled visualization of tau lesions in tauopathy patients, but the modes of their binding to different tau strains remain elusive. Here we compared binding of tau positron emission tomography ligands, PBB3 and AV-1451, by fluorescence, autoradiography and homogenate binding assays with homologous and heterologous blockades using tauopathy brain samples. Fluorescence microscopy demonstrated intense labelling of non-ghost and ghost tangles with PBB3 and AV-1451, while dystrophic neurites were more clearly detected by PBB3 in brains of Alzheimer's disease and diffuse neurofibrillary tangles with calcification, characterized by accumulation of all six tau isoforms. Correspondingly, partially distinct distributions of autoradiographic labelling of Alzheimer's disease slices with (11)C-PBB3 and (18)F-AV-1451 were noted. Neuronal and glial tau lesions comprised of 4-repeat isoforms in brains of progressive supranuclear palsy, corticobasal degeneration and familial tauopathy due to N279K tau mutation and 3-repeat isoforms in brains of Pick's disease and familial tauopathy due to G272V tau mutation were sensitively detected by PBB3 fluorescence in contrast to very weak AV-1451 signals. This was in line with moderate (11)C-PBB3 versus faint (18)F-AV-1451 autoradiographic labelling of these tissues. Radioligand binding to brain homogenates revealed multiple binding components with differential affinities for (11)C-PBB3 and (18)F-AV-1451, and higher availability of binding sites on progressive supranuclear palsy tau deposits for (11)C-PBB3 than (18)F-AV-1451. Our data indicate distinct selectivity of PBB3 compared to AV-1451 for diverse tau fibril strains. This highlights the more robust ability of PBB3 to capture wide-range tau pathologies.},
 pages = {764--780},
 title = {Distinct binding of PET ligands PBB3 and AV-1451 to tau fibril strains in neurodegenerative tauopathies.},
 volume = {140},
 year = {2017}
}