ABSTRACT
Objective:To investigate the effects of baicalein combined with 5-FU on the proliferation, apoptosis and migration of small cell lung cancer H466 cells, and further to explore its sensitization mechanism.Methods:H466 cells were cultured in vitro and divided into blank control group, baicalein single treatment group, 5-FU single treatment group and combined treatment group. CCK-8 experiment was used to detect cell survival rate in each group; Flow cytometry was used to detect cell apoptosis and changes in ROS levels; Western blot was used to detect changes in the protein expression of the MAPK pathway.Results:CCK-8 results showed that the survival rates of the four groups of cells after 24 h treatment were 114.3% ± 2.8%, 79.8% ± 3.4%, 57.6% ± 1.8%, and 40.3% ± 2.7%. Compared with the other three groups, the combined treatment group had stronger inhibitory effect on the proliferation of H446 cells, and the difference was statistically significant ( P<0.001) . The proportion of apoptotic H446 cells in the combined treatment group was 49.2%±3.8%, which was significantly different from 33.9%±4.3% in the 5-FU single treatment group, and the difference was statistically significant ( P<0.001) . The inhibition rate of H446 cell migration in the combined treatment group was higher than that in the 5-FU single treatment group, and the difference was statistically significant ( P <0.001) . Combined treatment of baicalein and 5-FU can up-regulate ROS levels in H446 cells, thereby regulating the MAPK signaling pathway. Conclusion:The combined use of baicalein and 5-FU can increase the level of ROS in lung cancer H446 cells, activate the JNK and p38 signaling pathways, inhibit the ERK signaling pathway, and enhance 5-FU's proliferation inhibition, apoptosis induction and migration inhibition effects on H446 cells, which provides a certain experimental basis for the application of baicalein in small cell lung cancer.