Evaluation of Engraftment of Superparamagnetic Iron Oxide-Labeled Mesenchymal Stem Cells Using Three-Dimensional Reconstruction of Magnetic Resonance Imaging in Photothrombotic Cerebral Infarction Models of Rats.
10.3348/kjr.2015.16.3.575
- Author:
Jaehyun SHIM
1
;
Byung Kook KWAK
;
Jisung JUNG
;
Serah PARK
Author Information
1. Department of Convergence Medicine and Pharmaceutical Biosciences, Chung-Ang University, Seoul 156-756, Korea.
- Publication Type:Original Article ; Research Support, Non-U.S. Gov't
- Keywords:
MRI;
Mesenchymal stem cell;
Superparamagnetic iron oxide;
Photothrombotic cerebral infarction;
3D reconstruction
- MeSH:
Animals;
Cerebral Infarction/pathology/*radiography;
Contrast Media;
Dextrans;
Humans;
Imaging, Three-Dimensional/methods;
Magnetic Resonance Imaging/*methods;
Magnetite Nanoparticles;
Male;
*Mesenchymal Stem Cell Transplantation;
Mesenchymal Stromal Cells/radiography;
Nanoparticles;
Neuroimaging/*methods;
Random Allocation;
Rats;
Rats, Sprague-Dawley;
Tomography, X-Ray Computed
- From:Korean Journal of Radiology
2015;16(3):575-585
- CountryRepublic of Korea
- Language:English
-
Abstract:
OBJECTIVE: To evaluate engraftment by visualizing the location of human bone marrow-derived mesenchymal stem cells (hBM-MSCs) three-dimensionally in photothrombotic cerebral infarction (PTCI) models of rats. MATERIALS AND METHODS: Magnetic resonance imaging (MRI) of an agarose block containing superparamagnetic iron oxide (SPIO)-labeled hBM-MSCs was performed using a 3.0-T MRI, T2-(T2WI), T2*-(T2*WI), and susceptibility-weighted images (SWI). PTCI was induced in 6 rats, and 2.5 x 10(5) SPIO-labeled hBM-MSCs were infused through the ipsilateral internal carotid artery (ICA group) or tail vein (IV group). MRI was performed on days 1, 3, 7, and 14 after stem cell injection. Dark signal regions were confirmed using histology. Three-dimensional MRI reconstruction was performed using the clinical workflow solution to evaluate the engraftment of hBM-MSCs. Volumetric analysis of the engraftment was also performed. RESULTS: The volumes of SPIO-labeled hBM-MSCs in the phantom MRI were 129.3, 68.4, and 25.9 microL using SWI, T2*WI, and T2WI, respectively. SPIO-labeled hBM-MSCs appeared on day 1 after injection, encircling the cerebral infarction from the ventral side. Dark signal regions matched iron positive cells and human origin (positive) cells. The volume of the engraftment was larger in the ICA group on days 1, 3, and 7, after stem cell injection (p < 0.05 on SWI). SWI was the most sensitive MRI pulse sequence (p < 0.05). The volume of infarction decreased until day 14. CONCLUSION: The engraftment of SPIO-labeled hBM-MSCs can be visualized and evaluated three-dimensionally in PTCI models of rats. The engraftment volume was larger in the ICA group than IV group on early stage within one week.
