Uptake of Folate-BSANP by cancer cells was gadually increased with the extension of incubation time or the increase of Folate-BSANP concentration, and the uptake could be competitively inhibited by excess free folate.

• 叶酸偶联白蛋白纳米粒的肿瘤细胞摄取量随纳米粒浓度增大、培养时间延长而增加，肿瘤细胞对叶酸偶联白蛋白纳米粒的摄取可被过量的外源性游离叶酸所抑制。