| Abstrakt: |
Objective: To explore the mechanism of tapinarof inhibiting proliferation and promoting apoptosis of non-small cell lung cancer A549 cell. Methods: The proliferative ability of non-small cell lung cancer cells A549 and H1299 was detected by clonal formation assay, and the cell viability of non-small cell lung cancer cells A549 was detected by CCK-8 assay. A549 cells were treated with different concentrations of tapinarof (0, 5, 10, 20) μmol/L for 24 h. The effects of tapinarof on the cell cycle of A549 were detected by flow cytometry using PI single dye method. Western blot assay was used to detect the effect of benzene-moder on the expression of cycle-associated protein P21 and CDK2. A549 cells were treated with different concentrations of tapinarof (0, 10, 20, 40) μmol/L for 48 h. Annexin V-FITC and PI double staining were used to detect the effect of tapinarof on apoptosis of A549 cells. Western blot assay was used to detect the effects of different concentrations of tapinarof on expression of apoptosis-related proteins, cleaved-caspase 3 and cleaved-PARP. Western blot analysis was performed to determine the expression of p-AKT and FOXO1 in A549 cells at different concentrations (0, 5, 10, 20) μmol/L. Results: The results of clonal formation experiment showed that 40 μmol/L tapinarof could completely inhibit the proliferation of A549 and H1299 cells. CCK-8 assay showed that compared with the control group (0 μmol/L), A549 cell activity decreased gradually with the increase of tapinarof concentration. A549 cells were stained with Annexin-FITC/PI. Flow cytometry showed that the apoptosis rate of A549 cells increased with the increase of tapinarof treatment concentration (40 μmol/L tapinarof treatment, P<0.001). After treatment with tapinarof for 48 h, the protein expression of cleaved-caspase 3 and cleaved-PARP in A549 cells was increased, compared with control group (0 μmol/L). Flow cytometry after PI staining of A549 cells showed that tapinarof induced A549 cell arrest in G1 phase. In A549 cells treated with tapinarof for 24 h, the expression of P21 protein was increased and CDK2 decreased. The phosphorylation level of AKT was significantly inhibited and the expression level of FOXO1 was increased in A549 cells treated with phenylenmode at different concentrations. Conclusion: Tapinarof inhibits the proliferation of A549 cells and induces apoptosis, which may be related to the AKT/FOXO1 signaling pathway. [ABSTRACT FROM AUTHOR] |
