天花粉蛋白对肺癌A549细胞凋亡及细胞骨架微管结构改变的研究

摘要

目的：探讨天花粉蛋白（Trichosanthin,TCS）对肺癌A549细胞株抑制增殖作用及诱导凋亡效应。方法：用不同剂量的TCS处理肺癌A549细胞，采用MTT法检测TCS对细胞增殖的抑制作用，透射电镜观察细胞骨架微管的变化，流式细胞术检测细胞周期和细胞凋亡率。结果：TCS使肺癌A549细胞呈凋亡型改变，细胞活性下降，且随着浓度的升高、时间的延长抑制率相应升高。结论：药理剂量的TCS可抑制肺癌A549细胞的增殖和分化，并通过细胞骨架的变化影响A549细胞的功能。%Objective:This study aimed to explore the effects of trichosanthin on the proliferative inhibition and apoptosis induc-tion in human lung carcinoma A549 cells. Methods:A549 cells were treated with various concentrations of TCS. The inhibitory effects in proliferation were detected by the MTT method. The microfilament changes were observed by transmission electron microscopy. Apoptosis rate and cell cycle were determined by flow cytometry. Results:A549 cells treated with TCS presented apoptotic changes and decreased cell activity. When the concentration increased and time was prolonged, the inhibition rate increased correspondingly. Conclusion:Pharmacological doses of TCS inhibited the proliferation and differentiation in lung carcinoma A549 cells and affected the function in A549 cells by changes in the cytoskeleton.