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动态成像的异性介质干细胞贩运到心肌梗塞的成像.

Dara L Kraitchman1, Mitsuaki Tatsumi, Wesley D Gilson

  • 1Russell H. Morgan Department of Radiology and Radiological Science, Johns Hopkins University School of Medicine, Baltimore, MD, USA. dara@mri.jhu.edu

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在心肌梗塞模型中,放射性核素成像有效地跟踪了介质干细胞 (MSC). 这种方法可视化了MSC贩运到受伤的心脏组织和其他器官的方法,提供了一种可靠的方法来研究干细胞分布.

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科学领域:

  • 心血管研究研究心血管研究
  • 再生医学是一种再生医学.
  • 生物医学成像技术 生物医学成像技术

背景情况:

  • 动物研究表明,干细胞可以再生心肌损伤.
  • 死后组织的组织学解释是有争议的.
  • 需要可靠的方法来追踪体内干细胞的定位.

研究的目的:

  • 为了动态地确定异构介质干细胞 (MSCs) 到急性心肌梗塞的体内贩运.
  • 为了比较放射性核素成像与MRI用于追踪MSCs.

主要方法:

  • 组合单光子发射CT (SPECT) /CT扫描仪用于高灵敏度成像.
  • 介质干细胞 (MSCs) 用放射性追踪剂和MR对比剂进行了协同标记.
  • 在静脉注射后,MSCs的体内生物分布和贩运被动态确定.

主要成果:

  • 在24小时内,SPECT/CT可视化了心肌梗塞中的MSC,持续7天.
  • 在24-48小时内观察到MSC从肺部转移到非目标器官 (肝脏,脏,脏).
  • 由于灵敏度较低,MRI无法证明目标心脏局部.

结论:

  • 非侵入性放射性核酸成像适用于动态跟踪MSC生物分布.
  • 这种技术有效地可视化MSC贩运到目标和非目标器官.
  • 放射性核素成像为评估心肌梗塞的干细胞治疗提供了一种经过验证的方法.