Polymeric 1 H MRI Probes for Visualizing Tumor In Vivo.

Polymeric 1 H MRI Probes for Visualizing Tumor In Vivo.
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用于体内肿瘤可视化的聚合物 1 H MRI 探针。

DOI:
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发表时间:
2017
期刊:
The chemical record
影响因子:
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通讯作者:
Y. Aoyama
Y. Aoyama
中科院分区:
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文献类型:
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作者:
T. Kondo;Yu Kimura;H. Yamada;Y. Aoyama

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磁共振成像(MRI)已经成为一种重要的非侵入性或低侵入性成像技术,提供高分辨率的三维图像以及关于组织的生理信息。低分子Gd-MRI造影剂(CA),如Gd-DTPA(DTPA:二乙三胺五乙酸)是临床常用的造影剂,而大分子Gd-MRI造影剂与低分子Gd-MRI造影剂相比有许多优点,有助于将CA的剂量和副作用的风险降至最低。因此,我们开发了手性树枝状大分子Gd-MRI CA,其具有较高的R1值。S同分异构体树状分子CaS与牛血清白蛋白的结合常数(Ka)高于R-异构体树枝状分子CaS。此外,基于一种全新的概念,我们开发了13C/15N富集型核磁共振/核磁共振探针,实现了对探针的高选择性观察和对感兴趣的代谢反应的分析。本文总结了我们最近在开发手性树枝状分子Gd-MRI CA和可自我追踪的13 C/15 N富集磷酰胆碱聚合物探针用于肿瘤早期检测方面的最新研究。
Magnetic resonance imaging (MRI) has become a prominent non- or low-invasive imaging technique, providing high-resolution, three-dimensional images as well as physiological information about tissues. Low-molecular-weight Gd-MRI contrast agents (CAs), such as Gd-DTPA (DTPA: diethylenetriaminepentaacetic acid), are commonly used in the clinical diagnosis, while macromolecular Gd-MRI CAs have several advantages over low-molecular-weight Gd-MRI CAs, which help minimize the dose of CAs and the risk of side effects. Accordingly, we developed chiral dendrimer Gd-MRI CAs, which showed high r1 values. The association constant values (Ka ) of S-isomeric dendrimer CAs to bovine serum albumin (BSA) were higher than those of R-isomeric dendrimer CAs. Besides, based on a totally new concept, we developed 13 C/15 N-enriched multiple-resonance NMR/MRI probes, which realized highly selective observation of the probes and analysis of metabolic reactions of interest. This account summarizes our recent study on developing both chiral dendrimer Gd-MRI CAs, and self-traceable 13 C/15 N-enriched phosphorylcholine polymer probes for early detection of tumors.
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