| Autor: |
Niemeyer M, Oostendorp RA, Kremer M, Hippauf S, Jacobs VR, Baurecht H, Ludwig G, Piontek G, Bekker-Ruz V, Timmer S, Rummeny EJ, Kiechle M, Beer AJ, Niemeyer, Markus, Oostendorp, Robert A J, Kremer, Markus, Hippauf, Sandra, Jacobs, Volker R, Baurecht, Hansjörg, Ludwig, Georg |
| Zdroj: |
European Radiology; Sep2010, Vol. 20 Issue 9, p2184-2193, 10p |
| Abstrakt: |
Objective: To assess migration of CD34(+) human stem cells to the bone marrow of athymic mice by using magnetic resonance (MR) imaging and Resovist, a contrast agent containing superparamagnetic iron oxide (SPIO) particles.Methods: All animal and human procedures were approved by our institution's ethics committee, and women had given consent to donate umbilical cord blood (UCB). Balb/c-AnN Foxn1(nu)/Crl mice received intravenous injection of 1 x 10(6) (n=3), 5 x 10(6) (n=3) or 1 x 10(7) (n=3) human Resovist-labelled CD34(+) cells; control mice received Resovist (n=3). MR imaging was performed before, 2 and 24 h after transplantation. Signal intensities of liver, muscle and bone marrow were measured and analysed by ANOVA and post hoc Student's t tests. MR imaging data were verified by histological and immunological detection of both human cell surface markers and carboxydextrancoating of the contrast agent.Results: CD34(+) cells were efficiently labelled by Resovist without impairment of functionality. Twenty-four hours after administration of labelled cells, MR imaging revealed a significant signal decline in the bone marrow, and histological and immunological analyses confirmed the presence of transplanted human CD34(+) cells.Conclusion: Intravenously administered Resovist-labelled CD34(+) cells home to bone marrow of mice. Homing can be tracked in vivo by using clinical 1.5-T MR imaging technology. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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