Neural Induction Potential and MRI of ADSCs Labeled Cationic Superparamagnetic Iron Oxide Nanoparticle In Vitro

Figure 6

(a) The labeling longevity of PEG/PEI-SPIO

(b) The labeling longevity of PEG/PVP-SPIO

(c) The labeling longevity of PEG/PEI-modified SPIO (25 ug/ml): the T2 signal and the relaxation time of the same amount of cells were gradually increased along with the continuous passage; the T2 signals and relaxation times of the P7 ADSCs (20 d) in the labeling group and the nonlabeling group showed no significant difference

(d) The labeling longevity of PEG/PVP-modified SPIO (25 ug/ml): the T2 signal and the relaxation of the same amount of cells were gradually increased along with the continuous passage; the T2 signals and relaxation times of the P6 ADSCs (15 d) in the labeling group and the nonlabeling group showed no significant difference