TY - JOUR
T1 - Neuroimaging-pathological correlations of [18F]THK5351 PET in progressive supranuclear palsy
AU - Ishiki, Aiko
AU - Harada, Ryuichi
AU - Kai, Hideaki
AU - Sato, Naomi
AU - Totsune, Tomoko
AU - Tomita, Naoki
AU - Watanuki, Shoichi
AU - Hiraoka, Kotaro
AU - Ishikawa, Yoichi
AU - Funaki, Yoshihito
AU - Iwata, Ren
AU - Furumoto, Shozo
AU - Tashiro, Manabu
AU - Sasano, Hironobu
AU - Kitamoto, Tetsuyuki
AU - Kudo, Yukitsuka
AU - Yanai, Kazuhiko
AU - Furukawa, Katsutoshi
AU - Okamura, Nobuyuki
AU - Arai, Hiroyuki
N1 - Copyright:
This record is sourced from MEDLINE/PubMed, a database of the U.S. National Library of Medicine
PY - 2018/6/29
Y1 - 2018/6/29
N2 - 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 [18F]THK5351 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, [18F]THK5351 retention also was observed in the cortical areas, particularly the temporal cortex. Neuropathological examination confirmed PSP in both patients. Regional [18F]THK5351 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 [18F]THK5351 retention, and binding was blocked completely by a reversible selective MAO-B inhibitor, lazabemide, in brain samples from these patients. In conclusion, [18F]THK5351 PET signals reflect MAO-B expressing reactive astrocytes, which may be associated with tau accumulation in PSP.
AB - 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 [18F]THK5351 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, [18F]THK5351 retention also was observed in the cortical areas, particularly the temporal cortex. Neuropathological examination confirmed PSP in both patients. Regional [18F]THK5351 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 [18F]THK5351 retention, and binding was blocked completely by a reversible selective MAO-B inhibitor, lazabemide, in brain samples from these patients. In conclusion, [18F]THK5351 PET signals reflect MAO-B expressing reactive astrocytes, which may be associated with tau accumulation in PSP.
KW - Monoamine oxidase
KW - PET
KW - PSP
KW - Reactive astrocyte
KW - Tau
KW - [18F]THK5351
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U2 - 10.1186/s40478-018-0556-7
DO - 10.1186/s40478-018-0556-7
M3 - Article
C2 - 29958546
AN - SCOPUS:85050963849
VL - 6
SP - 53
JO - Acta neuropathologica communications
JF - Acta neuropathologica communications
SN - 2051-5960
IS - 1
ER -