Fiche publication
Date publication
janvier 2014
Auteurs
Membres identifiés du Cancéropôle Est :
Pr GILLET Pierre
,
Dr VUISSOZ Pierre-André
,
Dr ROEDER Emilie
Tous les auteurs :
Roeder E, Henrionnet C, Goebel JC, Gambier N, Beuf O, Grenier D, Chen B, Vuissoz PA, Gillet P, Pinzano A
Lien Pubmed
Résumé
AIM: The aim of this work was the development of successful cell therapy techniques for cartilage engineering. This will depend on the ability to monitor non-invasively transplanted cells, especially mesenchymal stem cells (MSCs) that are promising candidates to regenerate damaged tissues. METHODS: MSCs were labeled with superparamagnetic iron oxide particles (SPIO). We examined the effects of long-term labeling, possible toxicological consequences and the possible influence of progressive concentrations of SPIO on chondrogenic differentiation capacity. RESULTS: No influence of various SPIO concentrations was noted on human bone marrow MSC viability or proliferation. We demonstrated long-term (4 weeks) in vitro retention of SPIO by human bone marrow MSCs seeded in collagenic sponges under TGF-beta1 chondrogenic conditions, detectable by Magnetic Resonance Imaging (MRI) and histology. Chondrogenic differentiation was demonstrated by molecular and histological analysis of labeled and unlabeled cells. Chondrogenic gene expression (COL2A2, ACAN, SOX9, COL10, COMP) was significantly altered in a dose-dependent manner in labeled cells, as were GAG and type II collagen staining. As expected, SPIO induced a dramatic decrease of MRI T2 values of sponges at 7T and 3T, even at low concentrations. CONCLUSIONS: This study clearly demonstrates (1) long-term in vitro MSC traceability using SPIO and MRI and (2) a deleterious dose-dependence of SPIO on TGF-beta1 driven chondrogenesis in collagen sponges. Low concentrations (12.5-25 microg Fe/mL) seem the best compromise to optimize both chondrogenesis and MRI labeling.
Référence
PLoS One. 2014 May 30;9(5):e98451
