[关键词]
[摘要]
目的 探究肉桂醛对食管癌鳞状细胞癌Eca109细胞增殖活性及凋亡的作用,并探讨其机制。方法 MTS实验检测不同质量浓度(1.88、3.75、7.50、15.00、30.00 μg/mL)肉桂醛对Eca109细胞增殖活性的影响;倒置相差显微镜观察Eca109细胞形态学变化;流式细胞术检测不同质量浓度肉桂醛对Eca109细胞周期分布和凋亡的影响;Western blotting检测不同质量浓度肉桂醛作用24 h对Eca109细胞凋亡相关蛋白Caspase-3/Caspase-9、促凋亡蛋白Bax以及抗凋亡蛋白Bcl-2和Mcl-1表达水平的影响。结果 质量浓度为15.00、30.00 μg/mL的肉桂醛作用Eca109细胞24 h后,与对照组相比,肉桂醛组细胞增殖活性显著降低(P<0.05);经肉桂醛作用后,Eca109细胞呈现明显的凋亡形态学变化;经不同质量浓度肉桂醛处理Eca109细胞24 h后,G0/G1期细胞比例明显下降(P<0.05),而G2/M期细胞比例明显增加(P<0.05);肉桂醛处理Eca109细胞24 h后,细胞凋亡率明显上升(P<0.05);与对照组相比,经不同质量浓度肉桂醛处理24 h后,Eca109细胞中凋亡蛋白Caspase-3和Caspase-9出现明显的裂解片段(P<0.05),抗凋亡蛋白Bcl-2和Mcl-1表达水平显著降低(P<0.05),而促凋亡蛋白Bax表达明显上调(P<0.05)。结论 肉桂醛可抑制食管癌鳞状细胞癌Eca109细胞增殖,促进其凋亡,其作用机制可能与上调凋亡蛋白Caspase-3、Caspase-9、促凋亡蛋白Bax表达,以及下调抗凋亡蛋白Bcl-2、Mcl-1表达有关。
[Key word]
[Abstract]
Objective To investigate effects of cinnamaldehyde (CA) on the proliferation and apoptosis of oesophageal squamous cell carcinoma Eca109 cells and to explore its mechanism. Methods The effects of different concentrations (1.88, 3.75, 7.50, 15.00, 30.00 μg/mL) of CA on the proliferation of Eca109 cells were detected by MTS assay; Morphological changes were observed by phase contrast microscope; Flow cytometry was used to detect cell cycle distribution and apoptosis rate of Eca109 at different concentrations of CA; The expression of apoptosis-related protein Caspase-3/Caspase-9, pro-apoptosis protein Bax and anti-apoptosis protein Bcl-2 and Mcl-1 in ECA109 cells treated with different concentrations of CA for 24 h was detected by Western blotting. Results After treated by CA with a concentration of 15.00, 30.00 μg/mL for 24 h, compared with the control group, the cell proliferation of Eca109 cells was significantly inhibited[(42.91 ±2.15)%, (36.04 ±2.97)% vs (100.00 ±0.00)%, P < 0.05]; After treated by CA, Eca109 cells showed obvious apoptotic morphological changes; After treated with different concentrations of CA for 24 h, the proportion of cells in G0/G1 phase was decreased significantly (P < 0.05), while the proportion of cells in G2/M phase was increased significantly (P < 0.05); After treated by CA for 24 h, the apoptosis rate of Eca109 cells was increased significantly[(4.3 ±0.11)%, (4.8 ±0.07)%, (9.1 ±0.13)% vs (1.0 ±0.03)%, P < 0.05]; Compared with the control group, the fragment of protein Caspase-3 and Caspase-9 was significantly cleaved in Eca109 cells treated with different concentrations of CA for 24 h (P < 0.05); The expression levels of anti-apoptotic protein Bcl-2 and Mcl-1 were significantly decreased (P < 0.05), while the pro-apoptotic protein Bax expression was significantly up-regulated (P < 0.05). Conclusion Cinnamaldehyde can inhibit the proliferation of oesophageal squamous cell carcinoma Eca109 cells and promote its apoptosis. The mechanism may be associated with the up-regulation of Caspase-3, Caspase-9, pro-apoptotic protein Bax and down-regulation of anti-apoptotic protein Bcl-2 and Mcl-1.
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[基金项目]
国家自然科学基金面上项目(81673642);国家自然科学基金面上项目(81772550)