labeling of human mesenchymal stem cells with quantum dots allows tracking of transplanted cells engrafted in infarcted pig hearts
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ID: 198063
2009
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Abstract
Objective: The purpose of this paper was to validate fluorescent quantum dots QD as a cell marker for tracking human mesenchymal stem cells in vivo, using a pre-clinical model of acute myocardium infarction. Methods: Human umbilical cord mesenchymal stem cells were isolated and expanded in vitro. Mesenchymal stem cells were labeled with QD 655. Myocardium infarction induction in pigs was performed by occluding the left descending coronary artery for 60 minutes, with a balloon catheter. One day after the myocardium infarction, intracoronary injection of mesenchymal stem cells was performed. One week after cell transplantation, the animals were killed; their hearts were removed and underwent histological examination Rresults: All the mesenchymal stem cells were labeled with QD 655. The labeling process did not affect viability, proliferation, and osteogenic and adipogenic differentiation potential of the cells. Labeled mesenchymal stem cells were easily tracked in the histological sections of the infarcted area. Cells were observed with a frequency of two per section, while no cells were observed in the remote myocardium. Cconclusion: These results indicate that QD 655 labeling is an efficient tool for tracking mesenchymal stem cells in vivo.
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oliveira2009einsteinlabeling
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| Authors | ;Daniela Mara de Oliveira;Breno Oliveira Almeida;Luciana Cavalheiro Marti;Tatiana Tais Sibov;Lorena Favaro Pavon;Denise Maria Avancini Costa Malheiros;Alexandre Holthausen Campos |
| Journal | New England Journal of Medicine |
| Year | 2009 |
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