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Effect of 125I-labeled 5-iodo-2′-deoxyuridine-chitosan drug loading nanoparticles (125I-UdR-CS-DLN) on HL-7702 and HepG2 cell survival. HL-7702 and HepG2 cells treated with different doses of 125I-UdR or 125I-UdR-CS-DLN for 24 and 48 hours, and the cell survival rate was assessed by the MTT assay (*p<0.05, **p<0.01).
