使用N-乙木酸衍生正子发射断层扫描放射标记物对细菌细胞壁进行成像
Sang Hee Lee1, Jung Min Kim1, Marina López-Álvarez1
1Department of Radiology and Biomedical Imaging, University of California, San Francisco, San Francisco, California 94158, United States.
ACS sensors
|November 22, 2023
概括
新的正电子发射断层扫描 (PET) 辐射追踪器针对N-乙木酸 (NAM) 使用-18开发. 这些新的PET标记物显示出改善患者细菌感染成像的前景.
科学领域:
- 核医学是一种核医学.
- 放射化学 放射化学是指辐射化学.
- 传染病成像学 传染病成像学
背景情况:
- 传统的成像感染方法具有挑战性.
- 定子发射断层扫描 (PET) 射线标记物针对细菌代谢提供了一个有前途的替代方案.
- 现有的基甘向的PET标记剂通常使用短寿命的同位素,限制了它们的临床效用.
研究的目的:
- 开发用于感染成像的新型PET放射追踪剂.
- 利用更长寿命的-18同位素来改善细菌感染的PET成像.
- 针对丁糖的氨基糖成分,特别是N-乙木氨酸 (NAM).
主要方法:
- 合成带有-18.18标记的反聚N-乙木酸 (NAM) 衍生物.
- 墨氨酸与4-尼托-2-[18F] propionate ([18F]NFP) 的反应.
- 隔离了二聚体体 (S) -FMA和 (R) -FMA的分离.
- 在人体病原体中标志物积累的体外和体内评估.
主要成果:
- 成功合成和分离了 (S) -FMA和 (R) -FMA.
- 人类病原体,包括金黄色葡萄球菌 (Staphylococcus aureus) 已经证明了强大的标记物积累.
- 在体外和体内显示出显著的积累,表明感染检测的潜力.
结论:
- 标有-18的NAM衍生的PET放射追踪剂是用于感染成像的有效工具.
- 这些新型标记剂在现有方法上具有优势,原因是-18.的半衰期较长.
- 开发的放射性追踪剂为未来诊断细菌感染的临床研究提供了基础.
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