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Live/dead fluorescent images of MCF-7 cells treated with 5FU-loaded (A) FA-CPEG-AuNPs, (B) FA-MAP-AuNPs, and (C) FA-TAP-AuNPs at (a) 0, (b) 5, (c) 25, (d) 50, (e) 100, and (f) 200 µg/mL after day 1 and day 3 of treatment (scale bar=200 µm).
Abbreviations: AuNP, gold nanoparticles; CPEG, citrate polyethylene glycol; FA, folate; 5FU, 5-fluorouracil; MAP, malate polyethylene glycol; TAP, tartrate polyethylene glycol.
