Long-TermIn VivoMagnetic Resonance Imaging Tracking of Endothelial Progenitor Cells Transplanted in Rat Ischemic Limbs and Their Angiogenic Potential
- 1 August 2011
- journal article
- research article
- Published by Mary Ann Liebert Inc in Tissue Engineering, Part A
- Vol. 17 (15-16), 2079-2089
- https://doi.org/10.1089/ten.tea.2010.0482
Abstract
Stem cell therapy has been used to repair ischemic tissues in the limbs, in myocardial infarctions, and in the brain. To understand the mechanisms of healing, a contrast agent capable of inducing sufficient magnetic resonance (MR) contrast would be useful in providing fundamental information about the cell migration and incorporation into the ischemic tissue. A magnetic resonance imaging contrast agent composed of dextran and gadolinium chelate was synthesized. Hydroxyl groups of dextran were activated with 1,1′-carbonylbis-1H-imidazole and reacted with propanediamine to obtain aminated dextran. This modified polymer was then reacted with mono-N-succinimidyl 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetate, then with fluorescein isothiocyanate, and finally reacted with gadolinium chloride solution (Dex-DOTA-Gd3+). Endothelial progenitor cells (EPCs) were selected as a stem cell model for magnetic resonance imaging tracking. Cells were isolated from the bone marrow harvested from the femurs and tibias of rats. Dex-DOTA-Gd3+ was then introduced into the EPCs by electroporation. The intracellular stability and cytotoxicity of Dex-DOTA-Gd3+ were evaluated in vitro. Dex-DOTA-Gd3+-labeled EPCs were transplanted into a rat model of ischemic limb, and MR images were acquired. Dex-DOTA-Gd3+ was found to efficiently label EPCs over a long duration without significant cytotoxicity. This provides an MR signal sufficient for tracking the EPCs intramuscularly injected into the limb.Keywords
This publication has 43 references indexed in Scilit:
- Design and characterization of a polymeric MRI contrast agent based on PVA for in vivo living‐cell trackingContrast Media & Molecular Imaging, 2010
- Nanotechnology in Medical ImagingArteriosclerosis, Thrombosis, and Vascular Biology, 2009
- Embryonic Stem Cell Grafting in Normal and Infarcted Myocardium: Serial Assessment with MR Imaging and PET Dual DetectionRadiology, 2009
- Implantation of Adipose-Derived Regenerative Cells Enhances Ischemia-Induced AngiogenesisArteriosclerosis, Thrombosis, and Vascular Biology, 2009
- Iron-Oxide Labeling and Outcome of Transplanted Mesenchymal Stem Cells in the Infarcted MyocardiumCirculation, 2007
- Magnetic control of vascular network formation with magnetically labeled endothelial progenitor cellsBiomaterials, 2007
- Magnetic Resonance Imaging and Confocal Microscopy Studies of Magnetically Labeled Endothelial Progenitor Cells Trafficking to Sites of Tumor AngiogenesisThe International Journal of Cell Cloning, 2005
- Therapeutic stem and progenitor cell transplantation for organ vascularization and regenerationNature Medicine, 2003
- Magnetodendrimers allow endosomal magnetic labeling and in vivo tracking of stem cellsNature Biotechnology, 2001
- Body distribution profile of polysaccharides after intravenous administrationDrug Delivery, 1993