油菜花粉提取物对前列腺癌细胞DU-145的体外生长抑制研究

目的探讨油菜花粉脂溶性提取物(BPE)对体外培养的人前列腺癌细胞DU-145的生长抑制及作用机制。方法采用不同浓度的BPE作用于体外生长的人前列腺癌细胞DU-145。通过CCK-8法检测BPE对DU-145的增殖抑制,透射电镜观察细胞形态,流式细胞术测定细胞周期的改变,RT-PCR测定促凋亡基因Bax和抑凋亡基因Bcl-2的表达。结果 BPE对DU-145细胞具有增殖抑制作用,且在一定范围内具有剂量依赖性。BPE浓度为1000μg/ml时,DU-145细胞抑制率以48h尤为显著,达到79.4%,与对照组比较,有显著性差异(P0.001)。低、中浓度的BPE作用24h后,对细胞生长抑制不明显。BPE可以引起细胞凋亡,同时改变细胞周期。随着浓度的升高,DU-145细胞G0/G1期比例明显增加,S期比例下降。BPE对细胞凋亡的影响显示阴性时,Bax表达较低,低浓度BPE使其表达大量增加;随着药物作用浓度增加,Bax表达反而降低。阴性时,Bcl-2表达较低,低浓度BPE使其表达大量增加;随着药物作用浓度增加,Bcl-2表达急剧降低。Bax/Bcl-2比值在阴性时最高,随着药物浓度升高而降低。结论 BPE对人前列腺癌细胞DU-145的体外生长具有抑制效应。

Inhibitory effect of Brassica campestris pollen extract on prostate cancer cell line DU-145 growth in vitro

Objective To investigate the inhibitory effect of Brassica campestris pollen extract (BPE) on growth of human prostate cancer cell line DU-145 in vitro. Methods BPE with different concentrations was added into DU-145 cells. CCK-8 assay was used to detect the inhibitory effect of BPE on DU-145. Transmission electron microscope and flow cytometry were adopted to observe and determine cell shapes and cycle changes. Moreover,RT-PCR was applied to assess the expression of promoting apoptosis gene (Bax) and antia...