藤黄酸对人结直肠癌细胞凋亡及Bax、Bcl-2和Caspase-3表达的影响

摘要

Objective To investiagate cell apoptosis and expressions of Bax,Bcl-2 andCaspase-3 in gambogic acid-treated colorectal cancer cells. Methods SW480/LOVO colorectal cancer cells were treated by gambogic acid. Cell Counting Kit-8 assay (CCK-8) was used to test cell proliferation. Microscopy was used to check the morphological changes. Immunofluorescence staining technique was used to detect cell apoptosis. Expressions of Bax,Bcl-2 and Caspase-3 protein were detected by Western blot assay. Results Gambogic acid inhibited the proliferation of SW480/LOVO in a dose and time-dependent manner. Gambogic acid could induce cell apoptosis. Gambogic acid increased expressions of Caspase-3 and Bax, increased the ratio of Bax/Bcl-2, and decreased Bcl-2 protein expression. Conclusion Gambogic acid can inhibit proliferation and induce apoptosis of SW480LOVO cells, with the mechanism of up-regulation of Bax/Bcl-2 and activation of Caspase-3.%目的：研究藤黄酸对结直肠癌细胞凋亡及Bax、Bcl-2和Caspase-3表达的影响。方法：藤黄酸对SW480、LOVO细胞进行干预，CCK-8法检测增殖抑制；光镜观察细胞形态变化；免疫荧光染色技术检测凋亡；Western Blot法测定Bax、Bcl-2、Caspase-3蛋白的表达。结果：藤黄酸抑制SW480、LOVO细胞增殖，且抑制作用随浓度及时间的增加而增强（P ＜0．05）；藤黄酸诱导SW480、LOVO细胞发生凋亡，增强Bax、Caspase-3蛋白的表达，减弱Bcl-2蛋白的表达，提高Bax／Bcl-2比值（P ＜0．05）。结论：藤黄酸抑制SW480、LOVO细胞增殖并诱导凋亡，其机制可能与提高Bax／Bcl-2比值、激活Caspase-3相关。