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Stem Cells International
Volume 2016 (2016), Article ID 7152761, 16 pages
Research Article

Magnet-Bead Based MicroRNA Delivery System to Modify CD133+ Stem Cells

1Reference and Translation Center for Cardiac Stem Cell Therapy (RTC), Department of Cardiac Surgery, Rostock University Medical Center, Schillingallee 69, 18057 Rostock, Germany
2Physikalisch-Technische Bundesanstalt, Abbestraße 2-12, Berlin 10587, Germany

Received 7 April 2016; Revised 24 August 2016; Accepted 30 August 2016

Academic Editor: Tao-Sheng Li

Copyright © 2016 Paula Müller et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Aim. CD133+ stem cells bear huge potential for regenerative medicine. However, low retention in the injured tissue and massive cell death reduce beneficial effects. In order to address these issues, we intended to develop a nonviral system for appropriate cell engineering. Materials and Methods. Modification of human CD133+ stem cells with magnetic polyplexes carrying microRNA was studied in terms of efficiency, safety, and targeting potential. Results. High microRNA uptake rates (~80–90%) were achieved without affecting CD133+ stem cell properties. Modified cells can be magnetically guided. Conclusion. We developed a safe and efficient protocol for CD133+ stem cell modification. Our work may become a basis to improve stem cell therapeutical effects as well as their monitoring with magnetic resonance imaging.