高等学校化学学报 ›› 2010, Vol. 31 ›› Issue (12): 2313.

• 研究快报 • 上一篇    下一篇

聚天冬氨酸修饰对磁性氧化铁纳米粒子稳定性及脑MRI造影效果的影响

孙琳2,刘桂锋1,庄家骐2,张惠茅1,杨文胜2   

  1. 1. 吉林大学中日联谊医院, 长春 130033
    2. 吉林大学化学学院, 长春 130012
  • 收稿日期:2010-08-31 修回日期:2010-10-12 出版日期:2010-12-10 发布日期:2010-12-06
  • 通讯作者: 张惠茅 E-mail:HuiMaoZhanglinda@163.com
  • 作者简介:张惠茅, 女, 副主任医师, 主要从事放射影像学研究. E-mail: HuiMaoZhanglinda@163.com
  • 基金资助:

    国家自然科学基金(批准号: 50902058, 50825202)资助.

Effect of Polyaspartic Acid Modification on Stability and MRI Enhancement of Magnetic Iron Oxide Nanoparticles

SUN Lin2,LIU GuiFeng1,ZHUANG JiaQi2,ZHANG HuiMao1*,YANG WenSheng2   

  1. 1. China-Japan Union Hospital, Jilin University, Changchun 130033, China
    2. College of Chemistry, Jilin University, Changchun 130012, China
  • Received:2010-08-31 Revised:2010-10-12 Online:2010-12-10 Published:2010-12-06
  • Contact: ZHANG HuiMao E-mail:HuiMaoZhanglinda@163.com
  • About author:张惠茅, 女, 副主任医师, 主要从事放射影像学研究. E-mail: HuiMaoZhanglinda@163.com
  • Supported by:

    国家自然科学基金(批准号: 50902058, 50825202)资助.

摘要:

采用聚天冬氨酸(PASP)作为表面修饰剂,发现通过改变PASP的修饰量可以有效调节SPIO的胶体稳定性从而使其在生理条件下具有较好的稳定性. 兔脑核磁共振成像(MRI)实验结果表明PASP修饰的SPIO可以有效地在兔脑组织中分散,从而提高MRI成像的对比度。

关键词: 超顺磁性氧化铁, 聚天冬氨酸, 核磁共振成像, 造影剂

Abstract:

Polyaspartic acid (PSAP) was employed to modify the surface of superparamagnetic iron oxide (SPIO). The colloidal stability of SPIO could be adjusted by the amount of PSAP used and the modified SPIO showed improved stability under physiological condition. Magnetic resonance imaging (MRI) experiments of rabbit brain demonstrated that the PSAP modified SPIO can be well dispersed into the brain tissue, resulting in enhanced contrast of the MRI images.

Key words: Superparamagnetic iron oxide, Polyaspartic acid, Magnetic resonance imaging, Contrast agent

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