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Tracking cells implanted into cynomolgus monkeys (Macaca fascicularis) using MRI
Yasuyo Ito-Fujishiro1, Hiroshi Koie, Hiroaki Shibata
1Tsukuba Primate Research Center, National Institutes of Biomedical Innovation, Health and Nutrition, Hachimandai 1-1, Tsukuba, Ibaraki 305-0843, Japan.
Experimental Animals
|April 12, 2016
Summary
Magnetic resonance imaging (MRI) safely tracked superparamagnetic iron oxide (SPIO)-labeled stem cells in monkeys. This method helps understand regenerative therapy mechanisms by visualizing cell fate post-transplantation.
Area of Science:
- Regenerative Medicine
- Medical Imaging
- Cellular Biology
Background:
- Stem cell transplantation shows promise for treating ischemic heart disease and other conditions.
- Tracking transplanted cells is crucial for understanding regenerative therapy efficacy and safety.
- Current methods for monitoring cell fate after transplantation are limited.
Purpose of the Study:
- To evaluate the efficacy of 3T MRI in tracking superparamagnetic iron oxide (SPIO)-labeled peripheral blood mononuclear cells in cynomolgus monkeys.
- To assess the safety and distribution of transplanted cells following intramuscular and intravenous administration.
- To determine if MRI can noninvasively monitor cell fate in vivo.
Main Methods:
- Peripheral blood mononuclear cells were labeled with SPIO.
- Labeled cells were injected intramuscularly and intravenously into cynomolgus monkeys.
- 3T MRI with T1- and T2-weighted sequences was used to track cells on days 0 and 7.
- Histological analysis using Prussian blue staining confirmed cell localization.
Main Results:
- SPIO-labeled cells were successfully visualized using MRI in the liver and triceps surae muscle.
- Cell tracking was performed without any abnormal clinical manifestations in the monkeys.
- MRI findings were corroborated by histological examination.
Conclusions:
- MRI using SPIO-labeled cells is a safe and effective method for tracking cell transplantation in non-human primates.
- This technique can provide valuable insights into the biodistribution and fate of transplanted cells in regenerative therapies.
- Further application of this MRI approach can elucidate the mechanisms underlying regenerative medicine.
