18F-labelled annexin V:: a PET tracer for apoptosis imaging

被引:120
作者
Murakami, Y
Takamatsu, H
Taki, J
Tatsumi, M
Noda, A
Ichise, R
Tait, JF
Nishimura, S
机构
[1] Med & Pharmacol Res Ctr Fdn, Hakui, Ishikawa 9250613, Japan
[2] Kanazawa Univ, Grad Sch Med Sci, Dept Biotracer Med, Kanazawa, Ishikawa 920, Japan
[3] Univ Washington, Dept Lab Med Med Med Genet & Pathol, Seattle, WA 98195 USA
关键词
fluorine-18; annexin V; apoptosis; myocardial ischaemia; positron emission tomography;
D O I
10.1007/s00259-003-1378-8
中图分类号
R8 [特种医学]; R445 [影像诊断学];
学科分类号
1002 ; 100207 ; 1009 ;
摘要
Annexin V can be used to detect apoptotic cells in vitro and in vivo, based on its ability to identify extracellular phosphatidylserine, which arises during apoptosis. In the present study, we examined the synthesis of fluorine-18 labelled annexin V as a positron emission tomography tracer for apoptosis imaging. The distribution of [F-18]annexin V and technetium-99m labelled annexin V, a well-characterised SPET tracer for apoptosis imaging, was compared. [F-18]annexin V was synthesised using N-succinimidyl 4-[F-18]fluorobenzoate as an F-18 labelling reagent. Synthesised and purified [F-18]annexin V was confirmed by SDS-PAGE. In an ex vivo imaging experiment, [F-18]annexin V was intravenously injected into rats 24 h after the induction of myocardial ischaemia, and accumulation in the left ventricle was examined. [F-18]annexin V accumulated in the infarct area of the left ventricle, where apoptotic cells were observed. In separate experiments, [F-18]annexin V or [Tc-99m]annexin V was intravenously injected into ischaemic or normal animals, and the distribution of the tracers was compared. In ischaemic animals, accumulation of [F-18]annexin V and [Tc-99m]annexin V in the infarct area was about threefold higher than in the non-infarct area. Furthermore, the ratio of accumulation in the normal heart to the blood radioactivity was not significantly different between the tracers. In normal animals, however, the uptake of [F-18]annexin V in the liver, spleen and kidney was much lower than that of [Tc-99m]annexin V. The low uptake of [F-18]annexin V in these organs might represent an advantage over [Tc-99m]annexin V.
引用
收藏
页码:469 / 474
页数:6
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