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相关概念视频

Magnetic Resonance Imaging01:24

Magnetic Resonance Imaging

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Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...
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基于Fe (III) 的MRI对比剂指导肝脏.

Geetanjali Deka1, Arisha Arora2, Priyanka Bhat3

  • 1Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, Assam, 781039, India.

Small (Weinheim an der Bergstrasse, Germany)
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概括

研究人员开发了一种新的,安全的铁基对比剂用于肝脏MRI. 封装在纳米颗粒中,它增强了图像清晰度,并显示了早期肝癌检测的前景,取代了不安全的gadolinium剂.

关键词:
磁力共振成像对比剂是一种MRI对比剂.肝细胞癌是肝细胞癌.铁复合体是一个铁复合体.磁共振成像技术的使用有孔的二氧化纳米粒子.

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科学领域:

  • 生物医学成像学 生物医学成像学
  • 纳米技术 纳米技术
  • 材料科学 材料科学 材料科学

背景情况:

  • 肝癌是癌症死亡的主要原因之一.
  • 目前用于肝脏MRI的加多基对比剂 (CA) 引发了安全问题.
  • 需要更安全的,非加多的肝脏特异性CA.

研究的目的:

  • 开发一种生物相容,非基于Gd的肝脏指导的MRI对比剂.
  • 增强一种新型铁 (III) 复合物的放松性和细胞吸收.
  • 为了评估在临床前肝脏成像中开发的药物的疗效.

主要方法:

  • 在多孔的二氧化纳米粒子 (18纳米) 中封装一个偏磁Fe(III) 复合物 (1).
  • 纳米颗粒的表面功能化使用p-甲基胺 (C1@SiO2-PMBA-NP).
  • 纵向放松性 (r1) 和血清白蛋白相互作用的评估.
  • 在C57BL/6小鼠的体外细胞内化研究 (HepG2细胞) 和临床前MRI.

主要成果:

  • 陷入困境显著提高了复合体1的放松性,增加了9倍.
  • 在血清白蛋白存在时,放松性进一步增加.
  • C1@SiO2-PMBA-NP证明了有效的HepG2细胞内部化.
  • 临床前MRI显示肝脏的时间依赖的对比度增强.

结论:

  • 开发的C1@SiO2-PMBA-NP是一种有前途的生物相容性,肝脏导向的T1加权对比剂.
  • 这种非Gd基的药物为肝脏MRI提供了更安全的替代品.
  • 该研究验证了使用这种新型纳米材料早期检测肝脏异常的潜力.