ABSTRACT
Objective To evaluate the therapeutic potential of a novel type of Poly (lactic-co-glycolic acid) (PLGA) nanoparticles loaded with glucose oxidase (GOD)/superparamagnetic iron oxide nanoparticles (Fe3O4Nps) on retinoblastoma (RB) cells in vitro. Methods PLGA nanoparticles loaded with GOD/Fe3O4 (PFG) were prepared by double emulsification. Their particle size, potential, external morphology, and internal structure were examined. Particles that made of PLGA (control), PLGA loaded with GOD (PG), and PLGA loaded with Fe3O4 (PF) are served as control. Y79 cells that were incubated with different particles are termed control group, PF group, PG group, and PFG group. After co-incubation with nanoparticles, cell viability, and reactive oxygen species production were detected. Results PLGA nanoparticles loaded with GOD/Fe3O4 were successfully prepared. The form of PLGA nanoparticles was uniform and showed a round shape with a diameter of 299.3 nm. The nanoparticles were engulfed by Y79 cells after co-incubation with Y79 cells, producing a large number of reactive oxygen species. Cytotoxicity test results showed that the cell viability of Y79 cells in PLGA nanoparticle group coated with GOD/Fe3O4 [(53.648±2.565)%] was significantly lower than that in control group [(100.028±4.491)%], PF group [(97.782±17.520)%] or PG group [(87.438±3.537)%](F=21.226, P<0.01); The cell viability of Y79 cells in 0.25 μg/ml PFG nanoparticle group [(51.770±1.529)%] was significantly lower than that in control group [(100.000±5.021)%], 0.0625 μg/ml group [(85.723±6.903)%] and 0.125 μg/ml group [(74.535±8.282)%] (F=34.593, P<0.05). Massive cell death was detected in the PFG group under laser confocal microscope. Conclusions The novel type of PLGA nanoparticles loaded with GOD/Fe3O4 toxic to Y79 tumor cells with a good reactive oxygen generation ability. It provides a potential treatment for RB.