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中国临床药理学与治疗学 ›› 2013, Vol. 18 ›› Issue (2): 161-165.

• 基础研究 • 上一篇    下一篇

冬凌草甲素通过PI3K/Akt通路诱导MDA-MB-231细胞的凋亡

汪茗1, 章尧1, 谢向荣2, 戚之琳1, 毕富勇1   

  1. 1皖南医学院生化教研室,芜湖 241002,安徽;
    2弋矶山医院心内科,芜湖 241001,安徽
  • 收稿日期:2012-10-10 修回日期:2012-10-10 发布日期:2013-02-28
  • 通讯作者: 毕富勇,通信作者,男,本科,教授,研究方向:肿瘤生化与分子生物学。 Tel: 0553-3932462 E-mail: bifuyong@yahoo.com.cn
  • 作者简介:汪茗,女,硕士,讲师, 研究方向:肿瘤生化与分子生物学。 Tel: 0553-3932462 E-mail: wangming801227@hotmail.com
  • 基金资助:
    安徽省高校省级优秀青年人才基金项目(2011SQRL104); 安徽省高校省级自然科学研究项目(KJ2011Z383); 皖南医学院中青年科研基金资助项目(WK201010)

Oridonin induces MDA-MB-231 cells apoptosis through PI3K/Akt pathway in vitro

WANG Ming1, ZHANG Yao1, XIE Xiang-rong2, QI Zhi-lin1, BI Fu-yong1   

  1. 1Department of Biochemistry, Wannan Medical College,Wuhu 241002,Anhui, China;
    2Department of Cardiology, Yijishan Hospital, Wuhu 241001, Anhui, China
  • Received:2012-10-10 Revised:2012-10-10 Published:2013-02-28

摘要: 目的: 研究冬凌草甲素对人乳腺癌MDA-MB-231细胞增殖产生的影响,初步探讨其作用机理。方法: 体外培养人乳腺癌MDA-MB-231细胞,采用6、12、24 μmol/L 冬凌草甲素对其进行处理,采用倒置显微镜进行细胞形态学观察,MTT比色法检测细胞存活率,流式细胞术检测细胞凋亡率,Western blotting检测凋亡相关蛋白procaspase-3、PARP及Akt、p-Akt、p-GSK3β表达的变化。结果: 冬凌草甲素作用MDA-MB-231细胞24 h后,可观察到细胞凋亡的形态学改变,以24 μmol/L组最为明显。实验组与对照组相比,细胞存活率显著降低、凋亡率显著升高(P<0.01),具有时间和剂量依赖性,凋亡相关蛋白procaspase-3下调,caspase-3底物PARP被逐步剪切,并伴随p-Akt、p-GSK3β蛋白水平下调(P<0.05)。结论: 冬凌草甲素可有效抑制人乳腺癌MDA-MB-231细胞的增殖,诱导其凋亡,机制与PI3K/Akt通路的抑制有关。

关键词: 冬凌草甲素, MDA-MB-231细胞, 细胞凋亡

Abstract: AIM: To research the proliferation inhibitory effect of oridonin on human breast cancer MDA-MB-231cells and explore the mechanism of the inhibitory effect. METHODS: MDA-MB-231 cells were incubated with oridonin in vitro. Morphological changes of MDA-MB-231 cells induced by oridonin for 24 h were observed by invert microscrope. The cell viability rate was evaluated by MTT assay. The cell apoptotic rate was evalutated by flow cytometry (FCM). The apoptosis associated protein level of procaspase-3, PARP,Akt, p-Akt, p-GSK 3β was examined by Western blotting. RESULTS: The apoptosis phenomenon of MDA-MB-231 cells induced by oridonin for 24 h could be observed. The apoptosis phenomenon of 24 μmol/L group was more obvious than other groups. The cell viability rate induced by 6,12,24 μmol/L oridonin was decreased and apoptotic rate was increased in a time- and dose-dependent manner (P<0.01). Oridonin cleaved PARP which is the substrate of caspase-3 in a dose-dependent manner(P<0.05). Oridonin also down- regulated the protein level of procaspase-3, phospho-Akt(p-Akt) and phospho-GSK3β(p- GSK3β) in a dose-dependent manner(P<0.05).CONCLUSION: Oridonin can inhibit the proliferation of human breast cancer MDA-MB-231 cells and induce cell apoptosis by inhibiting PI3K/Akt pathway.

Key words: Oridonin, MDA-MB-231, Cell apoptosis

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