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Dokumenttyp:
Journal Article; Article
Autor(en):
Berninger, Markus T; Mohajerani, Pouyan; Kimm, Melanie; Masius, Stephan; Ma, Xiaopeng; Wildgruber, Moritz; Haller, Bernhard; Anton, Martina; Imhoff, Andreas B; Ntziachristos, Vasilis; Henning, Tobias D; Meier, Reinhard
Titel:
Fluorescence molecular tomography of DiR-labeled mesenchymal stem cell implants for osteochondral defect repair in rabbit knees.
Abstract:
To assess labelling efficiency of rabbit mesenchymal stem cells (MSCs) using the near-infrared dye 1,1'-dioctadecyl-3,3,3',3'-tetramethylindotricarbocyanine iodide (DiR) and detection of labelled MSCs for osteochondral defect repair in a rabbit model using fluorescence molecular tomography-X-ray computed tomography (FMT-XCT).MSCs were isolated from New Zealand White rabbits and labelled with DiR (1.25-20 ?g/mL). Viability and induction of apoptosis were assessed by XTT- and Caspase-3/-7-testing. Chondrogenic potential was evaluated by measurement of glycosaminoglycans. Labelled cells and unlabeled controls (n = 3) underwent FMT-XCT imaging before and after chondrogenic differentiation. Osteochondral defects were created surgically in rabbit knees (n = 6). Unlabeled and labelled MSCs were implanted in fibrin-clots and imaged by FMT-XCT. Statistical analyses were performed using multiple regression models.DiR-labelling of MSCs resulted in a dose-dependent fluorescence signal on planar images in trans-illumination mode. No significant reduction in viability or induction of apoptosis was detected at concentrations below 10 ?g DiR/mL (p > .05); the chondrogenic potential of MSCs was not affected (p > .05). FMT-XCT of labelled MSCs in osteochondral defects showed a significant signal of the transplant (p < .05) with additional high-resolution anatomical information about its osteochondral integration.FMT-XCT allows for detection of stem cell implantation within osteochondral regeneration processes.o DiR-labelling of MSCs shows no toxic side effects or impairment of chondrogenesis. o Fluorescence molecular tomography allows for detection of MSCs for osteochondral defect repair. o FMT-XCT helps to improve evaluation of cell implantation and osteochondral regeneration processes.
Zeitschriftentitel:
Eur Radiol
Jahr:
2017
Band / Volume:
27
Heft / Issue:
3
Seitenangaben Beitrag:
1105-1113
Sprache:
eng
Volltext / DOI:
doi:10.1007/s00330-016-4457-5
PubMed:
http://view.ncbi.nlm.nih.gov/pubmed/27329519
Print-ISSN:
0938-7994
TUM Einrichtung:
Fachgebiet Sportorthopädie (Prof. Imhoff); Institut für Experimentelle Onkologie und Therapieforschung; Institut für Medizinische Statistik und Epidemiologie; Lehrstuhl für Biologische Bildgebung - Zusammenarbeit mit dem Helmholtz-Zentrum München (Prof. Ntziachristos)
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