多功能纳米氧化铈量子点对HepG2细胞光疗效应的研究

目的 研究多功能纳米氧化铈量子点（HACQDs-Ce6）对HepG2细胞的光疗效应。方法 溶解氧仪检测HACQDs-Ce6的催化产氧能力，CCK-8法、划痕实验、Calcein AM/PI活死细胞染色检测HACQDs-Ce6对HepG2细胞的增殖、迁移和凋亡的影响。重组小鼠巨噬细胞-粒细胞集落刺激因子（rm GM-CSF）和白细胞介素-4（rm IL-4）体外诱导树突状细胞（DC）探究HACQDs-Ce6对DC细胞的影响。结果 HACQDs-Ce6具有过氧化氢酶催化产氧能力; HACQDs-Ce6浓度>0.125 μg/ml时，光照组细胞增殖活力显著低于黑暗组（P=0.018）；划痕结果显示：光照后HACQDs-Ce6组HepG2细胞迁移能力显著低于PBS组（P<0.01）；HACQDs-Ce6对正常细胞HFF-1/L Wnt-3A和DC几乎无影响；Calcein AM/PI活死细胞染色显示HACQDs-Ce6和PDT联合作用下，几乎能杀死所有HepG2细胞。结论 HACQDs-Ce6对HepG2细胞的光疗效应明显，对正常细胞HFF-1/L Wnt-3A/DC无毒性。

Phototherapy Effect of Multifunctional Nano-cerium Oxide Quantum Dots on HepG2 Cells

Objective To investigate the phototherapy effect of multifunctional nanometer cerium oxide quantum dot (HACQDs-Ce6) on HepG2 cells. Methods The dissolved oxygen analyzer was used to detect the catalytic oxygen production capacity of HACQDs-Ce6. CCK-8 method, scratch test and Calcein AM/PI staining were used to analyze the effects of HACQDs-Ce6 on the proliferation, migration and apoptosis of HepG2 cells. The recombinant mouse macrophage-granulocyte colony stimulating factor (rm GM-CSF) and recombinant mouse interleukin-4 (rm IL-4) were used to induce the differentiation of mouse bone marrow precursor cells into dendritic cells (DC) in vitro to investigate the effect of HACQDs-Ce6 on DC cells. Results HACQDs-Ce6 had catalytic oxygen production capacity. The proliferation activity of cells in the laser group was significantly lower than that in the dark group when the concentration of HACQDs-Ce6 was greater than 0.125 μg/ml (P=0.018). The migration ability of HepG2 cells in HACQDs-Ce6 group was significantly lower than that in the PBS group (P<0.01). HACQDs-Ce6 almost had no effect on HFF-1/L wnt-3A and DC cells. Calcein AM/PI staining showed that the combined action of HACQDs-Ce6 and PDT killed almost all the HepG2 cells. Conclusion The phototherapy effect of HACQDs-Ce6 on HepG2 cells is obvious, with no damage to HFF-1/L wnt-3A/DC cells.