Abstract：Abstract: C-doped TiO2 nanoparticles combined with g-C3N4 were prepared by chemical vapor deposition, using X-ray diffraction, fluorescence spectroscopy, transmission electron microscopy, UV-Vis absorption spectroscopy and energy dispersive spectrometer to characterize nanoparticles. The effects of g-C3N4@C-TiO2 nanoparticles on HL60 cells in vitro were explored in dark and under light irradiation. Cell Counting Kit-8 (CCK-8) method was used to investigate the viability of HL60 cells treated with nanoparticles with a series of concentration gradients, and the level of intracellular reactive oxygen species was detected via fluorescent probe labeling technology. The experimental results showed that by modifying g-C3N4 on the surface of C-TiO2, the absorption wavelength range of TiO2 could be extended to the visible band. The particle size of g-C3N4@C-TiO2 prepared was about 10～20 nm, which met the size requirement of entering cells. Dark toxicity experiment proved that g-C3N4@C-TiO2 nanoparticles were less toxic to cells under darkroom conditions, which suggested they had good biocompatibility. Meanwhile, compared with the groups treated with TiO2 and C-TiO2 nanoparticles, the photocatalytic inactivation efficiency of the group treated with g-C3N4@C-TiO2 was as high as (76.5±1.9)% under light irradiation, indicating its potential as a potential photosensitizer for the treatment of leukemia.
Key words: photodynamic therapy; g-C3N4@C-TiO2; photosensitizer; HL60 cells; apoptosis of tumor cells
（Acta Laser Biology Sinica, 2021, 30(1): 043-051）
引用本文:
方 杰，王 健，张启云，李淼淼，肖睦沧，艾保全，熊建文. g-C3N4@C-TiO2纳米颗粒增强可见光驱动的体外光动力灭活HL60细胞的试验研究[J]. 激光生物学报, 2021, 30(1): 43-51.
FANG Jie, WANG Jian, ZHANG Qiyun, LI Miaomiao, XIAO Mucang, AI Baoquan, XIONG Jianwen. An Experimental Study Based on g-C3N4@C-TiO2 Nanoparticles to Enhance Visible-light-driven Photodynamic Therapy for HL60 Cells in vitro. journal1, 2021, 30(1): 43-51.
