Effect of chloroquine on the apoptosis of tongue squamous cell carcinoma SCC25 cells induced by bleomycin and nedaplatin

Objective: To study the effect and mechanism of chloroquine-induced chemotherapy drugs bleomycin and nedaplatin on apoptosis of tongue squamous cell carcinoma SCC25 cells. Methods: The inhibitory effect of different drugs on the growth of SCC25 cells was screened by MTT assay. MTT, Hoechst33258 staining and FCM were used to observe the changes of morphology, cell cycle and apoptosis of SCC25 cells after different treatments. The quantitative analysis of chloroquine induced by Western blot The effect of chemotherapy drugs on the expression of Bax, Bcl-2 and NFkB apoptosis- related proteins in SCC25 cells. Results: The proliferation inhibition rate of bleomycin and nedaplatin SCC25 cells induced by chloroquine was significantly higher than that of bleomycin and nedaplatin alone (p<0.05); Hoechst33358 fluorescence staining and flow cytometry showed In the bleomycin group, the apoptotic rate of the chloroquine plus bleomycin group was significantly increased, and the apoptosis rate of the chloroquine + nedaplatin group was significantly higher than that of the nedaplatin group (p<0.05). The proportion of G0/G1 phase in the chloroquine + bleomycin group was higher than that in the bleomycin group (p<0.05), and the ratio of cells in the S phase to the G2/M phase was decreased; the same chloroquine + nedaplatin group G0/G1 The proportion of cells in the period was higher than that in the nedaplatin group (p<0.05), and the proportion of cells in the S phase and G2/M phase decreased. WB results showed that the expression levels of Bax and NFkB in chloroquine + bleomycin group were significantly higher than those in bleomycin group alone, and the expression level of Bcl-2 was lower than that in bleomycin group alone. Bax and NFkB in chloroquine + nedaplatin group The expression level was significantly higher than that of the nedaplatin group alone. The expression level of Bcl-2 was lower than that of the nedaplatin group alone, and the difference was significant (p<0.05). Conclusion: Chloroquine induced bleomycin and nedaplatin can significantly inhibit the proliferation of tongue squamous cell carcinoma SCC25 cells, and its proapoptotic effect may be related to the activation of mitochondrial apoptosis-related proteins and nuclear transcription factors.