期刊
ACTA NEUROPATHOLOGICA COMMUNICATIONS
卷 6, 期 -, 页码 -出版社
BMC
DOI: 10.1186/s40478-018-0556-7
关键词
PSP; Monoamine oxidase; Reactive astrocyte; Tau; PET; [F-18]THK5351
资金
- GE Healthcare
- SEI (Sumitomo Electric Industries, Ltd.) Group CSR Foundation
- MEXT [16H06621, 15 K19767, 15H04900, 26117003]
- Shimazu Science Foundation
- Initiative for Realizing Diversity in the Research Environment (Tohoku University Morinomiyako Project for Empowering Women in Research) from Japan Science and Technology Agency, JST
- Grants-in-Aid for Scientific Research [16H06621, 15H04900] Funding Source: KAKEN
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 [F-18]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, [F-18]THK5351 retention also was observed in the cortical areas, particularly the temporal cortex. Neuropathological examination confirmed PSP in both patients. Regional [F-18]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 [F-18]THK5351 retention, and binding was blocked completely by a reversible selective MAO-B inhibitor, lazabemide, in brain samples from these patients. In conclusion, [F-18]THK5351 PET signals reflect MAO-B expressing reactive astrocytes, which may be associated with tau accumulation in PSP.
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