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芹菜素对裸鼠肝癌皮下移植瘤抑制作用的研究

2017-10-25高爱梅程晓莉

中国医药导报 2017年26期
关键词:肝癌

高爱梅+程晓莉

[摘要] 目的 探討芹菜素(APG)对裸鼠肝癌皮下移植瘤的抑制作用及其相关机制。 方法 建立人肝癌阿霉素(ADM)耐药细胞BEL-7402/ADM裸鼠皮下移植瘤模型,24只移植成功的裸鼠随机分为三组:对照组(ADM 3 mg/kg)、APG组(APG 50 mg/kg+ADM 3 mg/kg)和miR-101 mimics组(miR-101 mimics 5 mg/kg+ADM 3 mg/kg),每组8只。上述药物每3天注射l次,共7次。给药结束后处死裸鼠,切取移植瘤组织。免疫组化法检测Ki-67蛋白表达评价肿瘤细胞增殖,免疫蛋白印迹法检测肿瘤组织核转录因子红细胞系相关因子-2(Nrf2)蛋白的表达,qRT-PCR法测定移植瘤组织miR-101水平。 结果 与对照组相比,APG和miR-101 mimics能显著抑制肿瘤生长(P < 0.05),抑制肿瘤细胞增殖(P < 0.05或P < 0.01),此外,APG和miR-101 mimics还能下调肿瘤组织Nrf2蛋白的表达(P < 0.01),上调miR-101表达(P < 0.05)。 结论 APG能有效抑制肝癌移植瘤生长,其机制可能与抑制肿瘤细胞增殖,上调miR-101表达和下调Nrf2表达有关。

[关键词] 芹菜素;肝癌;化疗增敏;核转录因子红细胞系相关因子-2;miR-101

[中图分类号] R965 [文献标识码] A [文章编号] 1673-7210(2017)09(b)-0009-04

Inhibiting effect of apigenin on hepatocellar carcinoma xenografts in nude mice

GAO Aimei1 CHENG Xiaoli2

1.Department of Pharmacy, the Fifth People′s Hospital of Shanghai, Fudan University, Shanghai 200240, China; 2.Department of Pharmacy, Shenzhen Bao′an District Maternity and Child Health Care Hospital, Guangdong Province, Shenzhen 518133, China

[Abstract] Objective To investigate the effect of apigenin (APG) on hepatocellar carcinoma xenografts in nude mice and the possible molecular mechanism. Methods Models of nude mice were transplanted with BEL-7402/doxorubicin (ADM), and randomly divided into 3 groups, each group had 8 mice. The groups of mice were treated i.p. as follow: ADM (3 mg/kg, control group), APG+ADM (50 mg/kg+3 mg/kg, APG group), miR-101 mimics +ADM (5 mg/kg+3 mg/kg, miR-101 mimics group), every three days for a total of seven times. The volumes of tumor were measured. After the end of medication, the mice were sacrificed for measurement of tumor weights. Tumor cell proliferation was analyzed by Ki-67 immunostaining. Nuclear factor erythroid-2-related factor 2 (Nrf2) protein level was measured by Western blot. miR-101 level was detected by Real-time PCR. Results The volumes and weights of tumors in APG group and miR-101 mimics group were decreased compared with the control group (P < 0.05). Compared to the control group, APG and miR-101 mimics resulted in inhibition of tumor cell proliferation (P < 0.05 or P < 0.01), inhibition of Nrf2 expression (P < 0.01), and up-regulation of miR-101 levels (P < 0.05). Conclusion APG can inhibit the growth of hepatocellar carcinoma, its mechanism may partly be to inhibit the expression of Ki-67 and Nrf2, up-regulate the level of miR-101.

[Key words] Apigenin; Hepatocellular carcinoma; Chemosensitization; Nrf2; miR-101endprint

芹菜素(4',5,7-trihydroxyflavone,apigenin,APG)是天然存在的一种黄酮类化合物,广泛存在于多种水果、蔬菜、豆类和茶叶中。研究发现,芹菜素具有抗氧化、抗诱变、抗炎症、抗肿瘤等多种药理活性[1-4]。多项研究表明芹菜素对肿瘤具有抑制作用,其主要作用机制包括抗肿瘤细胞增殖,诱导肿瘤细胞凋亡,抑制肿瘤细胞侵袭、转移以及抗氧化等[5-8]。因此,芹菜素作为一种天然高效低毒的抗肿瘤药已成为目前肿瘤治疗研究的热点之一[9-10]。笔者前期实验发现,APG可逆转人肝癌阿霉素(doxorubicin,ADM)耐药细胞BEL-7402/ADM的耐药,增强ADM化疗敏感性,增加細胞内ADM的蓄积[11]。APG这种协同抑癌作用可能与下调耐药细胞核转录因子红细胞系相关因子-2(nuclear factor erythroid-2-related factor 2,Nrf2)信号通路有关。为了进一步研究APG在体内的抗肿瘤活性,本研究构建裸鼠肝癌皮下移植肿瘤动物模型,探讨APG的体内抗肿瘤活性及相关机制,以期为肝癌耐药的治疗提供有益的参考。……

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