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山姜素抑制卵巢癌OVCAR—8细胞增殖迁移及其机制研究

2018-06-13曾静王璟殷金凤宋琦

中国医药导报 2018年10期
关键词:凋亡

曾静 王璟 殷金凤 宋琦

[摘要] 目的 探討山姜素对人卵巢癌OVCAR-8细胞的增殖、迁移的抑制作用及其可能机制。 方法 以DMSO为溶剂对照,使用不同浓度山姜素(25、50、100、200和400 μmol/L)处理OVCAR-8不同时间(24、48和72 h)后,采用CCK-8试剂盒检测细胞增殖活力;采用3D肿瘤微球形成实验检测50 μmol/L山姜素处理7 d后肿瘤微球形成能力;使用划痕实验检测100 μmol/L山姜素处理24 h后对迁移能力;采用Western blot法检测不同浓度山姜素(50、100和200 μmol/L,以DMSO为对照)作用48 h后OVCAR-8细胞STAT3信号通路及凋亡相关蛋白表达变化。 结果 25~400 μmol/L山姜素对OVCAR-8细胞增殖均有抑制作用,且呈剂量-时间依赖效应关系(均P < 0.05);50 μmol/L山姜素处理组肿瘤微球直径较DMSO组明显减小(P < 0.05),而100 μmol/L山姜素组划痕宽度明显宽于DMSO对照组(P < 0.05);此外,50、100和200 μmol/L山姜素处理组Bax、cleaved-caspase-3和-9的表达明显增加,Bcl-2、p-STAT3、c-myc、survivin蛋白表达明显减少,均呈一定的剂量依赖效应关系(均P < 0.05)。而STAT3蛋白水平无明显变化(P > 0.05)。 结论 山姜素对卵巢癌OVCAR-8细胞增殖和迁移具有抑制作用,且可能与STAT3信号通路抑制以及线粒体凋亡通路激活相关。

[关键词] 山姜素;卵巢癌;增殖;迁移;微球;凋亡

[中图分类号] R711.75 [文献标识码] A [文章编号] 1673-7210(2018)04(a)-0013-05

[Abstract] Objective To explore the effect of alpinetin on human ovarian cancer cell line OVCAR-8 and its mechanism. Methods OVCAR-8 cells were treated with different concentrations of alpinetin (25, 50, 100, 200 and 400 μmol/L, DMSO as control) for different hours (24, 48 and 72 h), then cell viabilities were detected by CCK-8 assays. 3D spheroid assay was used to measure the spheroid formation capacity of OVCAR-8 cell after treated with 50 μmol/L alpinetin (DMSO as control) for 7 days. Besides, wound healing assay was used to measure the migration capacity of OVCAR-8 cell after treated with 100 μmol/L alpinetin (DMSO as control) for 24 h. In addition, Western blot was used to detect the protein levels of STAT3 signaling related and apoptosis related proteins in OVCAR-8 cells after alpinetin treatments (50, 100 and 200 μmol/L, DMSO as control) for 48 h. Results 25-400 μmol/L alpinetin had remarkable inhibiting effects on OVCAR-8 cells and in a dose-and time-dependent manner(all P < 0.05). After 7 days′ treatment, the diameter of spheroid in 50 μmol/L alpinetin group was significantly shorter than DMSO control group (P < 0.05). Besides, the width of wound in 100 μmol/L alpinetin group was significantly longer than DMSO control group after treatment for 24 h (P < 0.05). In addition, the protein levels of Bcl-2, p-STAT3, c-myc and survivin were decreased in 50, 100 and 200 μmol/L group of OVCAR-8 cells than DMSO control group after 48 exposure. On the contrary, the protein level of Bax, cleaved-caspase-3 and -9 was increased (all P < 0.05), and there were no significantly changes in STAT3 levels (P > 0.05). Conclusion Alpinetin can inhibit the proliferation and migration of OVCAR-8 cells,its mechanism may be related to the inhibition of STAT3 signaling pathway and the activation of mitochondrial apoptosis signaling.

[Key words] Alpinetin; Ovarian cancer; Proliferation; Migration; Spheroid; Apoptosis

卵巢癌是死亡率最高的妇科恶性肿瘤,也是女性癌症相关死亡的第五大常见原因[1]。其治疗主要是以铂类药物为核心的化学治疗,近年来化疗药物耐药成为卵巢癌复发和死亡率上升的重要因素,因此发现新的抗卵巢癌药物一直以来都是卵巢癌研究的热点之一。山姜素是提取自草豆蔻根茎或种子的一种天然类黄酮类物质。具有镇痛、抗炎和抗氧化作用[2]。近年来,国外有研究者将山姜素运用于抗肺癌及消化道等肿瘤的研究中[3-7],并证实其抗肿瘤作用,但其对卵巢癌细胞的作用及其机制尚不明确。因此,研究山姜素对人卵巢癌细胞的作用及其分子机制,对抗卵巢癌新药发现具有重要的意义。……

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