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Cell uptake of PEI-BP-CD and PEI-MP-CD systems. HeLa, MC373-E1, MG-63, and MDA-MB-231 cells were incubated for 2 h in the presence of 1 μM DOX or an equivalent concentration of DOX occluded onto βCD and PEI-BP-CD (20–21a,b) and PEI-MP-CD (22a,b) systems. Results are expressed as pmol DOX/mg protein. The data are shown as mean ± SEM (n = 6). *p < 0.05 vs DOX-treated cells; #p < 0.05 vsDOX ⊂ βCD-treated cells.
