作者:齐瑞芳 于小玲 尚芳芳 赵辉
【摘要】 目的 观察姜黄素对雄激素非依赖性前列腺癌细胞株PC3细胞增殖和凋亡的影响。方法 分别用0、10、20、30和40 μmol/L姜黄素作用PC3细胞48 h后,Cell Counting Kit8(CCK8)法检测细胞存活率;选用0、5、10、20 μmol/L姜黄素作用PC3细胞48 h后, Hoechst染色观察PC3细胞形态的变化,Annexin V/PI检测细胞凋亡率。结果 姜黄素能显著抑制PC3细胞的增殖(F=36.82,q=4.88~15.36,P<0.01);除0与5 μmol/L姜黄素组细胞凋亡率比较差异无显著性外,不同浓度姜黄素组之间细胞凋亡率比较差异有显著性(F=7.88,q=4.15~6.54,P<0.05)。20 μmol/L 姜黄素作用PC3细胞48 h后,倒置显微镜下可观察到部分凋亡细胞出现染色质凝集、核固缩、核碎裂等形态学改变。结论 姜黄素能显著抑制体外PC3细胞的增殖,诱导细胞凋亡,为其应用于临床雄激素非依赖性前列腺癌的治疗提供了实验依据。
【关键词】 姜黄素;前列腺肿瘤;PC3细胞;细胞凋亡
[ABSTRACT] Objective To observe the effect of curcumin on proliferation and apoptosis of PC3 cells in nonandrogendependent prostate cancer. Methods Different concentrations of curcumin0, 10, 20, 30 and 40 μmol/L were used to act on PC3 cells for 48 h, the survival rate of the cells was then determined using Cell Counting Kit8 (CCK8); 0,5,10, and 20 μmol/L curcumin were used to act on PC3 cells for 48 h and then the cell morphology was observed by Hoechst staining. Annexin V/PI was applied for apoptosis detection. Results Curcumin could significantly inhibit the PC3 cell proliferation (F=36.82,q=4.88-15.36,P<0.01). The differences of the cell apoptosis rates in differentconcentration groups were significant, except for the 0 and 5 μmol/L groups (F=7.88,q=4.15-6.54,P<0.01). After acting with 20 μmol/L curcumin for 48 h, the morphological changes such as chromatic agglutination, karyopyknosis, and nuclear fragmentation could be seen in part of apoptotic cells with inverted microscope. Conclusion Curcumin could, in vitro, dramatically inhibit PC3 cell proliferation and induce apoptosis, which provides an experimental evidence for therapy of nonhormonedependent prostatic cancer.
[KEY WORDS] Curcumin; Prostatic neoplasms; PC3 cells; Apoptosis
姜黄素是从多年草本植物姜黄中提取的一种酚类色素,它具有消炎、抗氧化、抗动脉粥样硬化和降血脂等作用[1]。近年来,随着医学与分子生物学的发展,人们对姜黄素的抗诱变及抗癌作用有了进一步认识[2]。姜黄素的抗肿瘤机制是多方面的,其中诱导肿瘤细胞凋亡的机制受到人们广泛的关注。本实验选用雄激素非依赖性前列腺癌细胞株PC3细胞作为研究对象,观察不同浓度的姜黄素对PC3细胞凋亡和增殖的影响,为临床使用姜黄素治疗雄激素非依赖性前列腺癌提供实验依据。现将结果报告如下。
1 材料与方法
1.1 材料来源
人前列腺癌细胞株PC3由上海第二军医大学病理生理教研室卢建教授提供。RPMI 1640培养基、胎牛血清购自Gibco公司;胰蛋白酶、姜黄素和DMSO为美国Sigma 公司产品;Cell Counting Kit8(CCK8)试剂盒、Hoechst染色试剂盒购自碧云天生物科技有限公司。姜黄素用DMSO 稀释成5×10 μmol/L,过滤除菌后,置于-20 ℃保存,临用前解冻。