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Comparison of 99mTc-annexin A5 with 18F-FDG for the detection of atherosclerosis in ApoE−/− mice

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Title: Comparison of 99mTc-annexin A5 with 18F-FDG for the detection of atherosclerosis in ApoE−/− mice
Other Titles: Comparison of 99mTc-annexin A5 with 18F-FDG for detecting atherosclerosis in ApoE-/- mice
Authors: Zhao, Yan Browse this author
Kuge, Yuji Browse this author
Zhao, Songji Browse this author
Morita, Koichi Browse this author
Inubushi, Masayuki Browse this author
Strauss, H. William Browse this author
Blankenberg, Francis G. Browse this author
Tamaki, Nagara Browse this author →KAKEN DB
Keywords: Atherosclerosis
Apoptosis
99mTc-annexin A5
18F-FDG
Apolipoprotein E-knockout mouse
Issue Date: Nov-2007
Publisher: Springer Berlin / Heidelberg
Journal Title: European Journal of Nuclear Medicine and Molecular Imaging
Volume: 34
Issue: 11
Start Page: 1747
End Page: 1755
Publisher DOI: 10.1007/s00259-007-0433-2
PMID: 17437104
Abstract: Purpose: 99mTc-annexin A5, a marker of ongoing apoptosis, and 18F-FDG, a marker of the increased metabolism of inflammatory cells, are supposed to be useful in the detection of metabolically active atheroma. This study reports a comparison of the intralesional distribution of these tracers in relation to lesion development in ApoE−/− mice. Methods: Male ApoE−/− mice (n = 12–14/group) were maintained on a Western-type diet after the age of 5 weeks. At 25 weeks, 99mTc-annexin A5 or 18F-FDG was injected and the aortas were harvested for autoradiography (ARG) and Oil Red O staining. Regional radioactivity accumulation was compared in relation to the Oil Red O staining score (ranging from 0 to 3, a semiquantitative parameter for evaluating lesion development). Results: Both 99mTc-annexin A5 and 18F-FDG showed preferential uptake into atherosclerotic lesions, with higher uptake levels for 18F-FDG (mean, 56.07 %ID×kg/m2) than for 99mTc-annexin A5 (mean, 10.38 %ID×kg/m2). The regional uptake levels of each tracer correlated with the Oil Red O staining score (r = 0.65, p < 0.05 for 99mTc-annexin A5; r = 0.56, p < 0.05 for 18F-FDG). The uptake ratios of advanced lesions (score >0.5) to early lesions (score <0.5) were significantly higher for 99mTc-annexin A5 than for 18F-FDG (f = 4.73, p = 0.03). Conclusion: Both 99mTc-annexin A5 and 18F-FDG accumulate in atherosclerotic lesions and correlate with the severity of each lesion. The higher absolute uptake levels of 18F-FDG may be advantageous for lesion detection, whereas the preferential uptake of 99mTc-annexin A5 in advanced lesions may be a useful indicator of late-stage lesions or vulnerable plaque transformation.
Rights: The original publication is available at www.springerlink.com
Type: article (author version)
URI: http://hdl.handle.net/2115/30199
Appears in Collections:医学院・医学研究院 (Graduate School of Medicine / Faculty of Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 玉木 長良

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