Fig. 4. Confocal images of miRNA-373 and miRNA-373 mimics. (A) Confocal images of MCF-7, MDA-MB-231 and NHDF cells transfected with the THP-AuNR nanoprobe. (B) Confocal images of MCF-7 cells transfected with Lp2000-miRNA-373 mimics (the internalized miRNA-373 mimics for a single MCF-7 cell were 0, 825, 1650, 3300 and 4950 fg from 1 to 5, respectively) and then detected with the AuNR nanoprobe. (C) Plot of fluorescence intensity versus quantity of intracellular miRNA-373 mimics. Scale bars: 30 μm.
