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INS-1 cells were cultured with PEG-USPIO (A, C, and E) or FeraSpin™ S (B, D, and F) at different concentrations for 24 hours and subsequently stained with Prussian blue.
Notes: The iron concentration was: 10 μg/mL for (A and B); 30 μg/mL for (C and D); and 50 μg/mL for (E and F).
Abbreviations: INS, insulinoma; PEG-USPIO, polyethylene glycol-coated ultrasmall superparamagnetic iron oxide.
