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Cytotoxicity tests ((A) FDA and (B) MTT) for control (Ctrl; untreated cells), positive cytotoxic control (7β-OHC, 100 µM), RSV (50 µM), HAPtS (50 µM in RSV equivalent), bare SPIONs (the same amount as in SPIONs-CPTES-HAPtS), SPIONs-CPTES (the same amount as in SPIONs-CPTES-HAPtS), and SPIONs-CPTES-HAPtS (amount equivalent to 50 µM HAPtS). Incubation time of cells with molecules or nanoparticles was 24 h and cells are C6 rat glioma cells.
