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Ishiki, Aiko; Harada, Ryuichi; Kai, Hideaki; Sato, Naomi; Totsune, Tomoko; Tomita, Naoki; Watanuki, Shoichi; Hiraoka, Kotaro; Ishikawa, Yoichi; Funaki, Yoshihito; Iwata, Ren; Furumoto, Shozo; Tashiro, Manabu; Sasano, Hironobu; Kitamoto, Tetsuyuki; Kudo, Yukitsuka; Yanai, Kazuhiko; Furukawa, Katsutoshi; Okamura, Nobuyuki; Arai, Hiroyuki
Acta neuropathologica communications, 06/2018, Letnik: 6, Številka: 1Journal Article
Recent positron emission tomography (PET) studies have demonstrated the accumulation of tau PET tracer in the affected region of progressive supranuclear palsy (PSP) cases. To confirm the binding target of radiotracer in PSP, we performed an imaging-pathology correlation study in two autopsy-confirmed PSP patients who underwent FTHK5351 PET before death. One patient with PSP Richardson syndrome showed elevated tracer retention in the globus pallidus and midbrain. In a patient with PSP-progressive nonfluent aphasia, FTHK5351 retention also was observed in the cortical areas, particularly the temporal cortex. Neuropathological examination confirmed PSP in both patients. Regional FTHK5351 standardized uptake value ratio (SUVR) in antemortem PET was significantly correlated with monoamine oxidase-B (MAO-B) level, reactive astrocytes density, and tau pathology at postmortem examination. In in vitro autoradiography, specific THK5351 binding was detected in the area of antemortem FTHK5351 retention, and binding was blocked completely by a reversible selective MAO-B inhibitor, lazabemide, in brain samples from these patients. In conclusion, FTHK5351 PET signals reflect MAO-B expressing reactive astrocytes, which may be associated with tau accumulation in PSP.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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Vir: Osebne bibliografije
in: SICRIS
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