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Morphology of U87 (A, E, I and M), U118 (B, F, J and N), U251 (C, G, K and O), and T98 (D, H, L and P) glioma cell lines treated with graphene oxide conjugated with FITC (E–H), graphene oxide–antisense miRNA-21 conjugated with FITC (I–L) and antisense miRNA-21 conjugated with FITC (M–P). Control group (non-treated cells): U87 (A), U118 (B), U251 (C), and T98 (D). Confocal microscopy. Scale bars: 50µm.
Abbreviation: FITC, fluorescein isothiocyanate.
