Jung SI, Kim SH, Kim HC, Son KR, Chung SY, Moon WK, Kim HS, Choi JS, Moon MH, Sung CK. In vivo MR imaging of magnetically labeled mesenchymal stem cells in a rat model of renal ischemia.
Korean J Radiol 2009;
10:277-84. [PMID:
19412516 PMCID:
PMC2672183 DOI:
10.3348/kjr.2009.10.3.277]
[Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2008] [Accepted: 12/08/2008] [Indexed: 12/23/2022] Open
Abstract
Objective
This study was designed to evaluate in vivo MR imaging for the depiction of intraarterially injected superparamagnetic iron oxide (SPIO)-labeled mesenchymal stem cells (MSCs) in an experimental rat model of renal ischemia.
Materials and Methods
Left renal ischemia was induced in 12 male Sprague-Dawley rats by use of the catheter lodging method. In vivo MR signal intensity variations depicted on T2*-weighted sequences were evaluated in both the left and right kidneys prior to injection (n = 2), two hours (n = 4), 15 hours (n = 2), 30 hours (n = 2) and 72 hours (n = 2) after injection of SPIO-labeled MSCs in both kidneys. Signal intensity variations were correlated with the number of Prussian blue stain-positive cells as visualized in histological specimens.
Results
In an in vivo study, it was determined that there was a significant difference in signal intensity variation for both the left and right cortex (40.8 ± 4.12 and 26.4 ± 7.92, respectively) and for both the left and right medulla (23.2 ± 3.32 and 15.2 ± 3.31, respectively) until two hours after injection (p < 0.05). In addition, signal intensity variation in the left renal cortex was well correlated with the number of Prussian blue stain-positive cells per high power field (r = 0.98, p < 0.05).
Conclusion
Intraarterial injected SPIO-labeled MSCs in an experimental rat model of renal ischemia can be detected with the use of in vivo MR imaging immediately after injection.
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