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在松节油诱导炎症的小鼠中进行多重 PET 示踪剂摄取研究。

A comparative uptake study of multiplexed PET tracers in mice with turpentine-induced inflammation.

机构信息

Department of Nuclear Medicine, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou 510080, China.

出版信息

Molecules. 2012 Nov 26;17(12):13948-59. doi: 10.3390/molecules171213948.

Abstract

The potential value of multiplexed positron emission tomography (PET) tracers in mice with turpentine-induced inflammation was evaluated and compared with 2-[¹⁸F]fluoro-2-deoxy-D-glucose ([¹⁸F]FDG) for glucose metabolism imaging. These PET tracers included [¹⁸F]fluoromethylcholine ([¹⁸F]FCH) for choline metabolism imaging, (S-[¹¹C]methyl)-D-cysteine ([¹¹C]DMCYS) for amino acid metabolism imaging, [¹¹C]bis(zinc(II)-dipicolylamine) ([¹¹C]DPA-Zn²⁺) for apoptosis imaging, 2-(4-N-[¹¹C]-methylaminophenyl)-6-hydroxybenzothiazole ([¹¹C]PIB) for β amyloid binding imaging, and [¹⁸F]fluoride (¹⁸F⁻) for bone metabolism imaging. In mice with turpentine-induced inflammation mice, the biodistribution of all the tracers mentioned above at 5, 15, 30, 45, and 60 min postinjection was determined. Also, the time-course curves of the tracer uptake ratios for inflammatory thigh muscle (IM) to normal uninflammatory thigh muscle (NM), IM to blood (BL), IM to brain (BR), and IM to liver (LI) were acquired, respectively. Moreover, PET imaging with the tracers within 60 min postinjection on a clinical PET/CT scanner was also conducted. [¹⁸F]FDG and ¹⁸F⁻ showed relatively higher uptake ratios for IM to NM, IM to BL, IM to BR, and IM to LI than [¹⁸F]FCH, [¹¹C]DPA-Zn²⁺, [¹¹C]DMCYS and [¹¹C]PIB, which were highly consistent with the results delineated in PET images. The results demonstrate that ¹⁸F⁻ seems to be a potential PET tracer for inflammation imaging. [¹⁸F]FCH and [¹¹C]DMCYS, with lower accumulation in inflammatory tissue than [¹⁸F]FDG, are not good PET tracers for inflammation imaging. As a promising inflammatory tracer, the chemical structure of [¹¹C]DPA-Zn²⁺ needs to be further optimized.

摘要

用松节油诱导炎症的小鼠模型评估了多模态正电子发射断层扫描(PET)示踪剂的潜在价值,并将其与 2-[¹⁸F]氟-2-脱氧-D-葡萄糖([¹⁸F]FDG)的葡萄糖代谢成像进行了比较。这些 PET 示踪剂包括用于胆碱代谢成像的[¹⁸F]氟甲基胆碱([¹⁸F]FCH)、用于氨基酸代谢成像的(S-[¹¹C]甲基)-D-半胱氨酸([¹¹C]DMCYS)、用于细胞凋亡成像的[¹¹C]双(锌(II)-二吡啶甲胺)([¹¹C]DPA-Zn²⁺)、用于β淀粉样蛋白结合成像的 2-(4-N-[¹¹C]-甲基氨基苯)-6-羟基苯并噻唑([¹¹C]PIB)和用于骨代谢成像的[¹⁸F]氟化物(¹⁸F⁻)。在松节油诱导炎症的小鼠中,在注射后 5、15、30、45 和 60 分钟时,测定了上述所有示踪剂的生物分布。还分别获得了炎性大腿肌肉(IM)与正常非炎性大腿肌肉(NM)、IM 与血液(BL)、IM 与大脑(BR)和 IM 与肝脏(LI)的示踪剂摄取比的时间曲线。此外,还在临床 PET/CT 扫描仪上进行了注射后 60 分钟内示踪剂的 PET 成像。[¹⁸F]FDG 和 ¹⁸F⁻显示 IM 与 NM、IM 与 BL、IM 与 BR 和 IM 与 LI 的摄取比相对较高,而[¹⁸F]FCH、[¹¹C]DPA-Zn²⁺、[¹¹C]DMCYS 和[¹¹C]PIB 则较低,这与 PET 图像描绘的结果高度一致。结果表明,¹⁸F⁻似乎是一种有潜力的炎症成像 PET 示踪剂。[¹⁸F]FCH 和[¹¹C]DMCYS 在炎症组织中的积累低于[¹⁸F]FDG,因此不是炎症成像的理想 PET 示踪剂。作为一种有前途的炎症示踪剂,[¹¹C]DPA-Zn²⁺的化学结构需要进一步优化。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/83ad/6268432/9dbc6a23b32a/molecules-17-13948-g001.jpg

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