期刊
NEUROBIOLOGY OF AGING
卷 94, 期 -, 页码 140-148出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.neurobiolaging.2020.05.003
关键词
Positron emission tomography; Functional neuroimaging; Alzheimer 's disease; Tau; Mitochondria
资金
- Ministry of Education, Culture, Sports, Science and Technology, Japan [26117001, 15K09979]
- strategic Research Program for Brain Science from Japan Agency for Medical Research and Development, AMED [JP18dm0107094, JP18dm0107062, 18dm0207007h0005, 17dm0107066h]
- Nanyang Assistant Professorship from Nanyang Technological University Singapore
- Alzheimer's Association [AARG-18-566427]
- Singapore Ministry of Education [2018-T1-001-041]
- [15653129]
- [19189478]
- [16768966]
- Grants-in-Aid for Scientific Research [15K09979] Funding Source: KAKEN
Damaged mitochondria may be one of the earliest manifestations of Alzheimer's disease. Because oxidative phosphorylation is a primary source of neuronal energy, unlike glycolysis-dependent energy production in inflamed glia, mitochondrial respiration could provide a selective biomarker of neuronal deterioration in Alzheimer's disease. Here we used a recently developed positron emission tomography (PET) probe targeting mitochondrial complex I (MC-I), 18F-BCPP-EF, to non-invasively visualize mito-chondrial abnormalities in the brains of tau transgenic mice (rTg4510). Tauopathy and neuro-inflammation were visualized by PET using a tau probe C-11-PBB3 and a translocator protein probe, F-18-FEBMP, respectively. A marked reduction in F-18-BCPP-EF uptake was observed in hippocampal and forebrain regions of tau transgenic mice, colocalizing with regions of tauopathy, neuronal damage, and neuroinflammation. MC-I signals were highly correlated with atrophy assayed by magnetic resonance imaging, but negatively associated with inflammatory signals, indicating that neuronal metabolic signals measured by MC-I PET were robust to inflammatory interference. MC-I may be a useful imaging biomarker to detect neuronal damage and metabolic changes with minimal interference from concomitant glial hypermetabolism. (C) 2020 Elsevier Inc. All rights reserved.
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