Robust surface coating for a fast, facile fluorine-18 labeling of iron oxide nanoparticles for PET/MR dual-modality imaging.

Robust surface coating for a fast, facile fluorine-18 labeling of iron oxide nanoparticles for PET/MR dual-modality imaging.
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可靠的表面涂层,可用于快速,容易的氟-18标记氧化铁纳米颗粒,用于PET/MR双模式成像。

DOI:
10.1039/c6nr07298d
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发表时间:
2016-12-01
期刊:
影响因子:
6.7
通讯作者:
Cheng Z
Cheng Z
中科院分区:
材料科学2区
文献类型:
--
作者:
Sun Z;Cheng K;Wu F;Liu H;Ma X;Su X;Liu Y;Xia L;Cheng Z

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在无机纳米粒子周围接枝一个坚固的有机壳可以优化它们的胶体特征,从而显着改善它们的物理化学性质。在这里,我们开发了一种聚合物涂层程序,用于为纳米颗粒提供胶体稳定性,更重要的是,用于将快速,简便的氟-18标记的氧化铁纳米颗粒(IONP)用于正电子发射断层扫描(PET)/磁共振(MR)双模态成像。两亲性聚合物的结构基于聚丙烯酸的主链,与多个油胺共轭以形成梳状支化结构。致密的聚合物壳为IONP提供了高的胶体稳定性,以抵抗诸如高温、低pH值和高离子强度的苛刻条件。通过将1,4,7-三氮杂环壬烷(NOTA)螯合剂结合到梳状两亲聚合物中用于螯合氟化铝离子,我们应用了一步放射性标记方法用于磁性纳米颗粒的快速,容易的放射性标记。新的策略可以显着减少手术时间和辐射暴露。通过使用18F标记的磁性纳米颗粒,在活体中成功地实现了PET/MR双模态成像。
Grafting a robust organic shell around inorganic nanoparticles can optimize their colloidal features to dramatically improve their physicochemical properties. Here, we developed a polymer coating procedure for providing colloidal stability to the nanoparticles and, more importantly, for applying a fast, facile fluorine-18 labeling of iron oxide nanoparticle (IONP) for positron emission tomography (PET)/magnetic resonance (MR) dual-modality imaging. The structure of the amphiphilic polymer is based on a backbone of polyacrylic acid, conjugated with multiple oleylamines to form a comb-like branched structure. The dense polymer shell provides high colloidal stability to the IONPs against the harsh conditions such as high temperature, low pH value, and high ion strength. By incorporating the 1,4,7-triazacyclononane (NOTA) chelator to the comb-like amphiphilic polymer for the chelation of aluminum fluoride ions, we applied a one-step radiolabeling approach for a fast, facile radiofluorination of magnetic nanoparticles. The new strategy can significantly reduce the procedure time and radiation exposure. The PET/MR dual modality imaging was successfully achieved in living subjects by using 18F labeled magnetic nanoparticles.
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