Efficiently tracking of stem cells in vivo using different kinds of uperparamagnetic iron oxide in swine with myocardial infarction

Gen Shan Ma, Chun Mei Qi, Nai Feng Liu, Cheng Xing Shen, Zhong Chen, Xiao Jun Liu, Yao Peng Hu, Xiao Li Zhang, Gao Jun Teng, Sheng Hong Ju, Ming Ma, Yao Liang Tang

Research output: Contribution to journalArticlepeer-review

10 Scopus citations


Background Superparamagnetic iron oxide (SPIO) particles have shown much promise as a means to visualize labeled cells using molecular magnetic resonance imaging (MRI). Micrometer-sized superparamagnetic iron oxide (MPIO) particles and nanometer-sized ultrasmall superparamagnetic iron oxide (USPIO) are two kinds of SPIO widely used for monitoring stem cells migration. Here we compare the efficiency of two kinds of SPIO during the use of stem cells to treat acute myocardial infarction (AMI). Methods An AMI model in swine was created by 60 minutes of balloon occlusion of the left anterior descending coronary artery. Two kinds of SPIO particles were used to track after intracoronary delivered 107 magnetically labeled mesenchymal stem cells (MR-MSCs). The distribution and migration of the MR-MSCs were assessed with the use of 3.0T MR scanner and then the results were confirmed by histological examination. Results MR-MSCs appeared as a local hypointense signal on T2-weighted MRI and there was a gradual loss of the signal intensity after intracoronary transplantation. All of the hypointense signals in the USPIO-labeled group were found on T2-weighted MRI, contrast to noise ratio (CNR) decreased in the MPIO-labeled group (16.07±5.85 vs. 10.96±1.34) and USPIO-labeled group (11.72±1.27 vs. 10.03±0.96) from 4 to 8 weeks after transplantation. However, the hypointense signals were not detected in MPIO-labeled group in two animals. MRI and the results were verified by histological examination. Conclusions We demonstrated that two kinds of SPIO particles in vitro have similar labeling efficiency and viability. USPIO is more suitable for labeling stem cells when they are transplanted via a coronary route.

Original languageEnglish (US)
Pages (from-to)1199-1204
Number of pages6
JournalChinese Medical Journal
Issue number8
StatePublished - Apr 2011
Externally publishedYes


  • Magnetic resonance contrast media
  • Magnetic resonance imaging
  • Mesenchymal stem cell
  • Myocardial infarction
  • Superparamagnetic iron oxide

ASJC Scopus subject areas

  • General Medicine


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