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红景天苷对胶质瘤U87—MG细胞增殖和侵袭能力的影响

2017-06-10黄平蒋锦杏徐璇陈丽

中国中医药信息杂志 2017年6期

黄平+蒋锦杏+徐璇+陈丽

摘要:目的 观察红景天苷对胶质瘤U87-MG细胞增殖和侵袭能力的影响,探讨其诱导U87-MG细胞凋亡机制。方法 不同浓度红景天苷和喜树碱加入U87-MG细胞中,作用24 h后,MTT法测定U87-MG细胞增殖,流式细胞术检测U87-MG细胞凋亡率,Transwell法检测U87-MG细胞侵袭能力,间接荧光标记法测定细胞内活性氧(ROS)水平,Western blot检测U87-MG细胞Caspase-3、Bcl-2、Bax、E-cadherin、N-cadherin和基质金属蛋白酶-9(MMP-9)的表达。结果 与空白对照组比较,各给药组U87-MG细胞生长抑制作用明显,10、50、100 ?g/mL红景天苷作用U87-MG细胞后,细胞侵袭能力显著下降,10、50、100 ?g/mL红景天苷作用U87-MG细胞48 h后均能诱导U87-MG细胞凋亡;ROS水平与红景天苷浓度呈正相关;10、50、100 ?g/mL红景天苷上调Caspase-3、Bax和E-cadherin的表達,下调Bcl-2和N-cadherin和MMP-9的表达。结论 红景天苷可诱导U87-MG细胞凋亡、抑制U87-MG细胞的侵袭能力。

关键词:红景天苷;胶质瘤U87-MG细胞;细胞增殖;活性氧;Caspase-3;基质金属蛋白酶-9

DOI:10.3969/j.issn.1005-5304.2017.06.016

中图分类号:R285.5 文献标识码:A 文章编号:1005-5304(2017)06-0064-04

Abstract: Objective To investigate the effects of salidroside on proliferation and invasive ability of glioma U87-MG cells; To discuss the its mechanism to induce apoptosis of U87-MG cells. Methods U87-MG cells were cultured in vitro for 24 h under different concentrations of salidroside and camptothecin. The proliferation of U87-MG cells was detected by MTT assay. The apoptosis rate of U87-MG cells was detected by flow cytometry. Transwell assay was used to detect the invasive ability of U87-MG cells. ROS was detected by indirect fluorescent labeling. The expressions of Caspase-3, Bcl-2, Bax, E-cadherin, N-cadherin and matrix metalloproteinase-9 (MMP-9) in U87-MG cells were detected by Western blot. Results Compared with the blank control group, U87-MG cells had significant inhibitory effect on the growth of U87-MG cells in each administration group, and the invasive ability of U87-MG cells was significantly reduced after 10, 50, 100 μg/mL salidroside was intervened, and 10, 50, 100 μg/mL salidroside for 48 h for U87-MG cells could induce apoptosis of the cells; the level of ROS was positively correlated with the concentration of salidroside; 10, 50, 100 μg/mL salidroside up-regulated the expressions of Caspase-3, Bax and E-cadherin, and down-regulated the expressions of Bcl-2, N-cadherin and MMP-9. Conclusion Salidroside can induce apoptosis of U87-MG cells and inhibit the invasive ability of U87-MG cells.

Key words: salidroside; glioma U87-MG cells; proliferation; ROS; Caspase-3; MMP-9

脑胶质瘤在临床上多呈恶性,其容易局部扩散,治疗比较困难且易复发,大多数患者预后不良[1]。近年来,随着医学的进步及学科间的不同领域交叉融合,特别是转化医学理念的不断深入,胶质瘤治疗手段取得极大的进步,逐渐形成了一套比较完整的治疗体系[2-3]。临床上普遍采用以手术切除为基础,结合放疗、化疗、免疫、分子靶向等综合治疗策略,这其中包括临床常用的化疗药物替莫唑胺,但其存在一定的毒副作用和耐药性,所以,在低毒性的前提下提高化疗药物的药效显得尤为重要。

红景天苷(salidroside)提取自红景天全草或根茎,是红景天的主要生物活性成分之一,具有抗炎、抗肿瘤、抗病毒等多种生物活性[4-6]。……

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