Multifunctional Core-Shell Silica Nanoparticles for Highly Sensitive<sup>19</sup>F Magnetic Resonance Imaging
作者:Hisashi Matsushita、Shin Mizukami、Fuminori Sugihara、Yosuke Nakanishi、Yoshichika Yoshioka、Kazuya Kikuchi
DOI:10.1002/anie.201308500
日期:2014.1.20
2) the restriction of the molecular mobility attenuates the 19F MRI signals. Herein, we developed novel multifunctional core–shell nanoparticles to solve these issues. They are composed of a core micelle filled with liquid perfluorocarbon and a robust silica shell. These core–shell nanoparticles have superior properties such as high sensitivity, modifiability of the surface, biocompatibility, and sufficient
19 F磁共振成像(19 F MRI)可用于监视来自生物样品,细胞和目标组织的特定信号,因为动物体内缺少背景信号。因此,对高灵敏度的19 F MRI造影剂的实际应用有很大的需求。但是,我们面临以下挑战:1)增加氟原子的数量会降低分子探针的溶解度,并且2)分子迁移率的限制会削弱19F MRI信号。本文中,我们开发了新颖的多功能核-壳纳米颗粒来解决这些问题。它们由充满液体全氟化碳的核心胶束和坚固的二氧化硅外壳组成。这些核壳纳米粒子具有出色的特性,例如高灵敏度,表面可修饰性,生物相容性和足够的体内稳定性。通过适当的表面修饰,通过19 F MRI成功检测了活小鼠的活细胞和肿瘤组织中的基因表达。