藤梨根提取物对食管癌EC109细胞抑制作用

目的 观察藤梨根乙酸乙酯提取物对食管癌EC109细胞生长、凋亡影响,并探讨其作用机制.方法 体外培养食管癌EC109细胞,分别给予不同浓度的藤梨根乙酸乙酯提取物进行干预,四甲基偶氮噻唑蓝(MTT)法检测细胞增殖抑制率,流式细胞术检测用药后EC109细胞凋亡率变化,免疫组化法检测用药后EC109细胞B细胞淋巴瘤/白血病-2基因(Bcl -2)、Bcl -2相关X蛋白(Bax)蛋白表达变化,激光共聚焦显微技术测定用药后EC109细胞胞内Ca2+]i变化.结果 细胞培养24、48、72 h后,对照组细胞凋亡率分别为(1.67±0.76)％、(2.32±0.45)％、(2.98±0.89)％,Bcl -2蛋白表达率分别为(50.12±3.41)％、(49.78±5.65)％、(51.25±6.34)％,Bax蛋白表达率分别为(17.98±2.85)％、(18.27±3.12)％、(17.76±3.64)％,而各干预组细胞凋亡率为7.05％ ～51.11％,均明显增加(t=5.419～17.826,P＜0.05),存在时-效和量-效趋势,同时其细胞Bcl -2蛋白表达降低,为43.32％ ～ 10.46％,Bax蛋白表达上调,为24.54％～ 63.47％,均存在时-效和量-效趋势,当作用时间≥48 h或浓度≥100 μg/mL时,干预组上述变化与对照组比较,差异有统计学意义(Bcl-2∶t=3.58～10.14；Bax∶t =5.047 ～ 11.065,P＜0.05)；用药后细胞内Ca2+]i明显升高,12h达高峰,此后缓慢减低,至48 h仍明显高于对照组.结论 藤梨根乙酸乙酯提取物可以明显抑制食管癌EC109细胞增殖,并诱导细胞发生凋亡,可能与降低其Bcl -2蛋白表达,上调Bax蛋白表达,升高细胞内Ca2+]i有关.

Inhibitory effect of Radix Actinidiae extractives on esophagus cancer cell line EC109

Objective To study the effects of Radix Actinidiae extractives on the proliferation and apoptosis of esophagus cancer cell line EC109 and to explore its mechanism.Methods EC109 cells were cultured in vitro.The cells were treated with different doses of Radix Actinidiae extractives.3-4,5-dimethylthylthiazol-2-yl]-2,5 diphenyltetrazolium bromide(MTT) assay was used to detect the inhibition of the cells.Cell apoptosis was measured by flow cytometry(FCM).Immunohistochemistry(S-P) was used to detect the express...