Breviscapine induced the apoptosis of non-small cell lung cancer A549 cells

doi:10.12092/j.issn.1009-2501.2020.06.003

Abstract

Abstract: AIM: To analyze the apoptosis promoting effect of breviscapine on NSCLC cells and the growth of transplanted tumor and investigate the mechanism. METHODS: The apoptosis, Caspase-3 activity, Bax and Bcl-2 expression of A549 cells treated with 25, 50 and 100 μmol/L breviscapine were detected. The subcutaneous transplanted tumor model was constructed with A549 cells. The mice were intraperitoneally injected with 10 mg/kg and 20 mg/kg breviscapine every day. The size and weight of the tumor were observed every week. On the 21st day, the mice were killed and the tumor was obtained. The expression of Bax and Bcl-2 was detected by Western blot. Bax/Bcl-2 ratio was analyzed. Caspase-3 expression was detected by immunohistochemistry and apoptosis in the tumor was detected by TUNEL staining. RESULTS: Breviscapine increased the apoptosis rate of A549 cells. The results of enzyme labeling showed that Caspase-3 activity increased significantly after breviscapine treatment compared with the control group. Western blot showed that breviscapine could significantly inhibit the expression of anti-apoptosis protein Bcl-2, increase the expression of pro-apoptosis protein Bax, and increase the ratio of Bax/Bcl-2. In vivo, on the 14th and 21st day, the tumor size of the treatment group was significantly smaller than that of the control group, while the weight of nude mice was not significantly reduced. Western blot showed that breviscapine could upregulate the expression of Bax and down regulate the expression of Bcl-2 in the transplanted tumor, while the expression of Caspase-3 was significantly increased. TUNEL staining showed that the proportion of apoptosis increased significantly compared with the control after breviscapine treatment. CONCLUSION: Breviscapine can induce the apoptosis of A549 cells in vitro and in vivo. The mechanism may be that breviscapine upregulates Bax expression and downregulates Bcl-2 expression, increases Bax/Bcl-2 ratio, activates Caspase-3, resulting in A549 cell apoptosis.

Key words: breviscapine, non-small cell lung cancer, Bax, Bcl-2, apoptosis

CLC Number:

R965.2
R734

WEI Weitian, CHEN Sheng, WANG Liang, ZENG Jian. Breviscapine induced the apoptosis of non-small cell lung cancer A549 cells[J]. Chinese Journal of Clinical Pharmacology and Therapeutics, 2020, 25(6): 618-624.

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