To analyze the prevention effect of daidzein on oral squamous cell carcinoma by targeting MMP12.
Methods
2
The targets of daidzein and their relationship with pathological characteristics of oral squamous cell carcinoma were analyzed by databases. CAL-27 and Tca8113 cells were divided into the control group, the daidzein group and the daidzein+MMP12 group. The cell survival rate was determined by the MTT assay, the cell proliferative activity was determined by the CCK-8 assay, the cell growth was determined by the clone formation assay, the cell migration and invasion were determined by the Transwell assay, and the MMP12 protein expression was determined by Western blot. The nude mice were given subcutaneous injection of human oral squamous cell carcinoma CAL-27 cell line to construct the subcutaneous xenograft tumors models. The mice in the daidzein group were injected with daidzein once every 1 day, while the mice in the control group was injected with the same volume of normal saline. The tumor volume and mass were calculated, and the expression of Ki67 protein in the xenografts tissues was detected by immunohistochemistry.
Results
2
GEO2R analysis showed that MMP12 was expressed in oral squamous cell carcinoma (
P
<
0.05), and the expression of MMP12 was related to lymph node metastasis (
P
<
0.05). GSEA analysis showed that the gene sets related to cell proliferation, migration, and invasion were all enriched in the MMP12 high expression group. The higher the concentration of daidzein, the longer the action time, the lower/fewer the cell activity, the number of cloned cells, the number of cell invasion and migration of the oral squamous cell carcinoma (
P
<
0.05). The volume, mass and Ki67 protein expression level of xenografts in the daidzein group were significantly smaller/lower than those in the control group (
P
<
0.05). With the prolongation of daidzein action time or the increase of daidzein concentration, the expression level of MMP12 was significantly decreased (
P
<
0.05). Compared with the control group, the expression level of MMP12, the cell activity, the number of cloned cells, the number of cell invasion and migration of oral squamous cell carcinoma cell in the daidzin group were significantly reduced (
P
<
0.05). Compared with the daidzein group, the cell activity, the number of cloned cells, the number of cell migration and invasion of oral squamous cell carcinoma cell in the daidzein+MMP12 group were significantly increased (
P
<
0.05).
Conclusion
2
Daidzein can further inhibit the proliferation, migration and invasion of oral squamous cell carcinoma by targeting MMP12 to down-regulate the expression of MMP12, thereby exerting the anti-tumor effect.
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