Figure 5From: Folic-acid-conjugated pullulan/poly(DL-lactide-co-glycolide) graft copolymer nanoparticles for folate-receptor-mediated drug delivery Confocal laser scanning microscope images (a) and flow cytometric analysis (b). KB cells were treated with DOX or FAPuLG-2 nanoparticles. For blocking of the folate receptor of tumor cells, folic acid was pre-treated 1 h before drug or nanoparticle treatment.Back to article page