High-performance nanostructured MR contrast probes.

High-performance nanostructured MR contrast probes.
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DOI:
10.1039/c0nr00173b
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发表时间:
2010-10
期刊:
影响因子:
6.7
通讯作者:
Meade TJ
Meade TJ
中科院分区:
材料科学2区
文献类型:
--
作者:
Hu F;Joshi HM;Dravid VP;Meade TJ

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磁共振成像(MRI)已成为生物分子成像和临床诊断的有力手段。随着纳米科学技术的飞速发展,基于纳米结构的磁共振造影剂发展迅速。这在一定程度上是由于可调的磁性和细胞吸收特性、较大的接合表面积和有利的生物分布。在这篇综述中,我们描述了我们在开发高性能纳米结构磁共振造影剂方面的最新进展。具体地说,我们报道了表现出T1磁共振对比度的富Gd纳米结构探针,以及显示T2 MR对比度增强的超顺磁性Fe3O4和CoFe2O4纳米结构。描述了纳米结构的尺寸、形状、组装和表面修饰对弛豫性能的影响。此外,还评估了这些造影剂在生理条件下的胶体稳定性、生物相容性和表面功能方面用于体外和活体磁共振成像的潜力。
Magnetic resonance imaging (MRI) has become a powerful technique in biological molecular imaging and clinical diagnosis. With the rapid progress in nanoscale science and technology, nanostructure-based MR contrast agents are undergoing rapid development. This is in part due to the tuneable magnetic and cellular uptake properties, large surface area for conjugation and favourable biodistribution. In this review, we describe our recent progress in the development of high-performance nanostructured MR contrast agents. Specifically, we report on Gd-enriched nanostructured probes that exhibit T1 MR contrast and superparamagnetic Fe3O4 and CoFe2O4 nanostructures that display T2 MR contrast enhancement. The effects of nanostructure size, shape, assembly and surface modification on relaxivity are described. The potential of these contrast agents for in vitro and in vivo MR imaging with respect to colloidal stability under physiological conditions, biocompatibility, and surface functionality are also evaluated.
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