Abstract | BACKGROUND: MATERIALS AND METHODS: F-PBR06 was synthesized using a Synthra RNplus module automatically. RAW264.7 cells were used for cell binding study with F-PBR06. In-vivo micro-PET/CT imaging for ApoE mice and C57 mice was performed 1 h after injection of F-PBR06. CD68 and F480 immunofluorescence stainings were performed in the aorta tissues. RESULTS: In-vitro cell studies showed uptake of F-PBR06 to RAW264.7 cells. Micro-PET/CT imaging identified the atherosclerotic lesions in the aortic arch of ApoE mice successfully, whereas no signal was observed in C57 mice. The ratio of plaque-to-muscle in ApoE mice of 32 weeks was significantly higher than that in ApoE mice of 22 weeks, which was confirmed by CD68 immunofluorescence staining and F480 immunofluorescence staining. CONCLUSION: TSPO radioligand F-PBR06 allows noninvasive PET/CT imaging of macrophage-abundant atherosclerotic plaques as well as positive correlation between PET imagings and ex-vivo immunofluorescence staining of plaques in mice with different ages, thereby representing a potential attractive tool for evaluating the vulnerability of atherosclerotic plaques towards rupture.
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Authors | He Zhang, Jie Xiao, Jun Zhou, Hui Tan, Yan Hu, Wujian Mao, Zhequan Fu, Qingyu Lin, Hongcheng Shi, Dengfeng Cheng |
Journal | Nuclear medicine communications
(Nucl Med Commun)
Vol. 40
Issue 4
Pg. 370-376
(Apr 2019)
ISSN: 1473-5628 [Electronic] England |
PMID | 30875334
(Publication Type: Journal Article)
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Chemical References |
- Acetanilides
- N-fluoroacetyl-N-(2,5-dimethoxybenzyl)-2-phenoxyaniline
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Topics |
- Acetanilides
- Animals
- Macrophages
(immunology)
- Male
- Mice
- Plaque, Atherosclerotic
(diagnostic imaging, immunology)
- Positron Emission Tomography Computed Tomography
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