食品科学

• 营养卫生 • 上一篇    下一篇

乌贼墨肽聚糖对前列腺癌PC-3、DU-145细胞作用机制研究

郑玉寅,杨最素,闫海强,黄芳芳,李 荣,丁国芳*   

  1. 浙江海洋学院食品与医药学院,浙江 舟山 316004
  • 出版日期:2013-07-15 发布日期:2013-06-28
  • 通讯作者: 丁国芳
  • 基金资助:

    浙江省科技厅重大项目(2010C13009;2011C02003);浙江省海洋生物技术产业重点科技创新团队项目(2010R50029);
    浙江省自然科学基金项目(Y2100805;Y3100129;Y3100129);浙江省新苗人才计划项目(2010R411039);
    舟山市科技计划海洋专项(092016)

Apoptosis Induction and Underlying Mechanism of Peptidoglycan from Cuttlefish Ink on Prostate Cancer PC-3 and DU-145 Cells

ZHENG Yu-yin,YANG Zui-su,YAN Hai-qiang,HUANG Fang-fang,LI Rong,DING Guo-fang*   

  1. School of Food Science and Pharmacy, Zhejiang Ocean University, Zhoushan 316004, China
  • Online:2013-07-15 Published:2013-06-28
  • Contact: DING Guo-fang

摘要:

目的:研究乌贼墨肽聚糖对前列腺癌PC-3和DU-145细胞凋亡的影响,以及细胞凋亡的机制。方法: 用 HE染色观察肽聚糖作用后细胞形态变化,流式细胞术检测细胞早期凋亡率,免疫组化检测肽聚糖作用前后细胞 中COX-2和VEGF蛋白阳性表达情况,原位杂交检测肽聚糖作用前后细胞中Bcl-2 mRNA和Caspase-3 mRNA表达的 变化。免疫印迹检测肽聚糖作用前后细胞中COX-2、VEGF、Bcl-2和Caspase-3的蛋白表达情况。结果:肽聚糖作 用后的细胞出现凋亡的形态学改变,流式细胞术检测后发现,早期凋亡细胞随着作用时间和药物质量浓度的增加 而增加,两种细胞中的COX-2和VEGF蛋白表达量下降,Bcl-2 mRNA的表达量减少,而Caspase-3 mRNA表达量增 加。免疫印迹结果显示,COX-2、VEGF 和Bcl-2蛋白表达量下降,Caspase-3蛋白表达量增加。结论:乌贼墨肽聚 糖可以诱导前列腺癌PC-3和DU-145细胞的凋亡,机制可能是下调COX-2、VEGF蛋白和Bcl-2 mRNA的表达;上调 Caspase-3 mRNA的表达。

关键词: 乌贼墨肽聚糖, PC-3细胞株, DU-145细胞株, 细胞凋亡

Abstract:

Objective: To explore the antitumor effect of cuttlefish ink peptidoglycan (PGN) on PC-3 and DU-145 cells and
its mechanism in vitro. Methods: After PC-3 and DU-145 cells were treated by cuttlefish ink PGN, HE staining was used
to observe cell growth condition and morphology, FCM was used to observe cell apoptosis, immunocytochemical staining
(SABC) was used to analyze the expression of COX-2 and VEGF proteins and in situ hybridization was used to analyze the
mRNA expression of Bcl-2 Caspase-3. The expression of COX-2, VEGF, Bcl-2 and Caspase-3 in the two human prostate
cancer cell lines were also examined using western blot. Results: Morphological features of apoptosis, and the early stage
of apoptosis in treated cells was observed in a dose-dependent manner. Moreover, cuttlefish ink peptidoglycan exposure for
24 h could result in a decease in the expression of COX-2, VEGF and Bcl-2 and an increase in the expression of Caspase-3.
Conclusion: Cuttlefish ink peptidoglycan can induce the apoptosis of PC-3 and DU-145 cells possibly by down-regulating
the expression of COX-2 and VEGF proteins and Bcl-2 mRNA and up-regulating the expression of Caspase-3 mRNA.

Key words: cuttlefish ink peptidoglycan, PC-3 cell line, DU-145 cell line, apoptosis

中图分类号: