DNA-TiO2纳米结合物标有磁共振对比剂的标签
Paul J Endres1, Tatjana Paunesku, Stefan Vogt
1Department of Chemistry, Northwestern University, 2145 Sheridan Road, Evanston, Illinois 60208, USA.
Journal of the American Chemical Society
|December 1, 2007
概括
研究人员开发了一种用于MRI成像的新型纳米粒子. 这种Gd(III) 修饰的DNA-TiO2纳米粒子针对特定的DNA序列,可以在细胞内检测到.
科学领域:
- 纳米技术纳米技术
- 生物医学成像技术 生物医学成像技术
- 材料科学 材料科学 材料科学
背景情况:
- 纳米级材料,特别是基于金属的纳米粒子,对多功能成像探测器有很大的希望.
- 这些纳米颗粒可以集中药物和对比剂,以向特定的器官,组织和细胞.
研究的目的:
- 开发一种新的纳米粒子系统,用于同时进行细胞成像和有针对性的输送.
- 使用Gd(III) 修饰的DNA-TiO2半导体纳米颗粒制造一个神经药剂.
主要方法:
- 合成Gd(III) 修饰的DNA-TiO2半导体纳米粒子.
- 利用DNA杂交用于特定的细胞内目标识别和保留.
- 使用磁共振 (MR) 成像用于细胞内纳米粒子检测.
主要成果:
- 成功制备了Gd(III) 修饰的DNA-TiO2半导体纳米粒子.
- 证明了这些纳米粒子在细胞内的MR成像检测能力.
- 通过DNA杂交,展示了纳米颗粒在特定亚细胞位置的保留.
结论:
- 开发了第一个用于定向DNA序列识别和MRI成像检测的纳米粒子系统.
- 该系统可实现同时成像和纳米颗粒的特定亚细胞定位.
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