紫龙金对人乳腺癌细胞系MCF-7增殖及凋亡的影响

目的观察复方中药紫龙金对人乳腺癌细胞系MCF-7增殖的抑制作用及对其凋亡的诱导作用,探讨紫龙金治疗乳腺癌的作用机制。方法依据培养液紫龙金浓度的差异,实验共设4组:(1)对照组:不加紫龙金干预的1640培养液;(2)紫龙金低浓度组:1.5 mg生药/mL紫龙金培养液;(3)紫龙金中浓度组:3 mg生药/mL紫龙金培养液;(4)紫龙金高浓度组:6 mg生药/mL紫龙金培养液。采用细胞计数法绘制生长曲线及四甲基偶氮唑蓝(MTT)比色法检测不同浓度紫龙金对MCF-7细胞增殖能力的影响,并应用流式细胞术、Hoechst 33342核染色法及DNA梯度形成法测定紫龙金诱导凋亡的作用。结果(1)与对照组比较,紫龙金各剂量组的细胞计数在各时间点(24、48、72、96、120、144 h)明显减少,其差异均有统计学意义(P0.05);紫龙金各剂量组间的生长抑制率差异除低、中浓度组间在24、72 h无统计学意义外(P0.05),各剂量组间两两比较在不同时间点(24、48、72、96、120、144 h),其差异均有统计学意义(P0.05)。紫龙金对MCF-7细胞的增殖抑制作用呈时间依赖性和剂量依赖性;(2)紫龙金使细胞阻滞在G_0/G_1期;(3)中、高浓度紫龙金诱导MCF-7细胞凋亡,并形成DNA ladder。结论紫龙金能抑制人乳腺癌细胞MCF-7细胞增殖,并诱导细胞凋亡,从而起到抗肿瘤的作用。

Effects of Zilongjin on Proliferation and Apoptosis of Human Breast Cancer Cell Line MCF-7

Objective To study the effect of Zilongjin(ZLJ,a composite Chinese drug) on proliferation and apoptosis of human breast carcinoma cell line MCF-7.Methods MCF-7 cells were randomly divided into four groups depending on the culture solution used,the control group,cultured with 1640 medium not contained ZLJ; and the three ZJL groups cultured with medium contained low(1.5 mg/mL),moderate(3 mg/mL) and high (6 mg/mL) dosage of ZLJ crude drug respectively.The changes of cell proliferation were assessed by cell gro...