Abstract

背景与目的已有的研究表明:Cyclin D1和Cyclin E是细胞周期中重要的正性调控因子,其高表达与肿瘤的增殖密切相关。本研究旨在探讨马钱子碱(Brucine)对人肺癌细胞株PC-9增殖的影响,及其与Cyclin D1和Cyclin E表达的影响。方法将PC-9细胞分为4组:空白对照组、DMSO对照组(2‰)、150 μM Brucine组、300 μM Brucine组。CellTiter-Glo发光法、平板克隆形成实验观察该药对PC-9细胞增殖的影响,流式细胞仪检测细胞周期,qRT-PCR检测细胞周期相关基因Cyclin D1、Cyclin E mRNA的表达,Western blot检测细胞周期相关基因Cyclin D1、Cyclin E蛋白的表达。结果与对照组比较,CellTiter-Glo发光法、平板克隆形成实验结果显示:Brucine可以抑制人肺癌细胞株PC-9的增殖,并呈时间-剂量依赖性(P < 0.01);流式结果显示对细胞周期的影响主要是阻滞PC-9细胞于G0/G1期;qRT-PCR结果显示Cyclin D1、Cyclin E mRNA的表达下调;Western blot结果显示Brucine使Cyclin D1、Cyclin E的表达降低。结论Brucine能明显抑制人肺癌细胞株PC-9的增殖,机制主要与其通过下调Cyclin D1、Cyclin E表达,进而阻滞细胞周期有关。

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