食品科学 ›› 2018, Vol. 39 ›› Issue (3): 176-181.doi: 10.7506/spkx1002-6630-201803027

• 营养卫生 • 上一篇    下一篇

葡萄籽原花青素提取物对砷诱导人肝细胞HL-7702损伤的保护作用及其机制

徐孟川,李述刚*,丁玉松,牛 强,冯刚玲,申 卉,郭方明   

  1. 石河子大学医学院,新疆 石河子 832000
  • 出版日期:2018-02-15 发布日期:2018-01-30
  • 基金资助:
    国家自然科学基金地区科学基金项目(81560517;81760584);兵团应用基础研究项目(2015AG014);兵团科技领域重点攻关项目(2014BA039);石河子大学国际合作项目(GJHZ201602);2016年自治区研究生科研创新项目(XJGRI2016053)

Protective Mechanism of Grape Seed Proanthocyanidin Extract against Oxidative Damage Induced by Arsenic in HL-7702 Cells

XU Mengchuan, LI Shugang*, DING Yusong, NIU Qiang, FENG Gangling, SHEN Hui, GUO Fangming   

  1. School of Medicine, Shihezi University, Shihezi 832000, China
  • Online:2018-02-15 Published:2018-01-30

摘要: 目的:研究葡萄籽原花青素提取物(grape seed proanthocyanidin extract,GSPE)对砷诱导的人肝细胞 HL-7702损伤的保护作用及其机制,为砷中毒的防治和GSPE的抗氧化研究提供理论依据。方法:将人肝细胞HL-7702 分为对照组、砷染毒组(25 μmol/L)、GSPE干预组(5、10、25、50 mg/L)以及GSPE单独干预组(50 mg/L), 分别处理24 h和48 h后,分别测定天门冬氨酸氨基转移酶(aspartate transaminase,AST)、丙氨酸氨基转移酶 (alanine aminotransferase,ALT)、谷胱甘肽(glutathione,GSH)、超氧化物歧化酶(superoxide dismutase, SOD)和丙二醛(malondialdehyde,MDA)水平以及总抗氧化能力(total antioxidant capacity,T-AOC)变化。噻 唑蓝(3-(4,5)-dimethylthiahiazo(-z-yl)-3,5-di-phenytetrazoliumromide,MTT)法分析细胞生存率,利用实时定量聚 合酶链式反应以及Western blot法检测HL-7702细胞中核因子E2相关因子(nuclear factor erythroid-2 related factor 2, Nrf2)、血红素氧合酶1(heme oxygenase 1,HO-1)、醌氧化还原酶1(quinone oxidoreductase 1,NQO1)和谷 胱甘肽巯基转移酶(glutathione S-transferase,GST)的mRNA以及蛋白表达。结果:MTT实验发现,与对照组比 较,高浓度砷(≥25 μmol/L)染毒组细胞存活率显著降低(P<0.05)。GSPE干预组(>10 mg/L)细胞中的ALT 和AST活力、MDA水平显著低于砷染毒组(P<0.05),SOD活力、GSH含量以及T-AOC水平显著高于砷染毒组 (P<0.05),GSPE干预组HL-7702细胞中Nrf2、HO-1、NQO1、GST的mRNA及蛋白表达增高(P<0.05)。结 论:GSPE对砷诱导的人肝细胞HL-7702氧化损伤具有拮抗作用,且具有一定的剂量效应关系,其机制可能是通过 激活Nrf2介导的抗氧化信号通路,提高细胞抗氧化能力,从而改善砷引起的肝损伤。

关键词: 葡萄籽原花青素提取物, 砷, 抗氧化活性, 核因子E2相关因子

Abstract: Objective: To explore the protective mechanism of grape seed proanthocyanidin extract (GSPE) against oxidative damage induced by arsenic for the purpose of providing a theoretical foundation for the prevention and treatment of arsenic poisoning and for the evaluation of the antioxidant activity of GSPE. Methods: HL-7702 cells were randomly divided into seven groups: control, arsenic poisoning (25 μmol/L), GSPE intervention (5, 10, 25 and 50 mg/L), and single GSPE treatment (50 mg/L) groups. After treatment for 24 and 48 h, the levels of aspartate transaminase (AST), alanine aminotransferase (ALT), glutathione (GSH), superoxide dismutase (SOD), total antioxidant capacity (T-AOC), and malondialdehyde (MDA) were determined by commercial kits. Cell viability was tested by 3-(4,5)-dimethylthiahiazo(-z-yl)- 3,5-di-phenytetrazoliumromide (MTT). We used polymerase chain reaction (PCR) and Western blot to detect the mRNA and protein expression levels of nuclear factor erythroid-2 related factor 2 (Nrf2), glutathione S-transferase (GST), heme oxygenase 1 (HO-1), and quinone oxidoreductase 1 (NQO1). Results: The cell viability in the high-concentration arsenic groups (≥ 25 μmol/L) was significantly lower than that in the control group (P < 0.05). The levels of ALT, AST and MDA in the GSPE intervention group were significantly lower than those in the arsenic poisoning group (P < 0.05), while a significant elevation was observed for GSH, T-AOC and SOD (P < 0.05). The mRNA and protein expression levels of Nrf2, GST, HO-1 and NQO1 in the GSPE intervention group were significantly elevated when compared with the arsenic poisoning group (P < 0.05). Conclusion: GSPE has an antagonistic action against arsenic poisoning in a dose-dependent manner by activating the Nrf2-mediated signaling pathway to improve the antioxidant capacity of cells and consequently reduce arsenic-induced liver oxidative injury.

Key words: grape seed proanthocyanidin extract, arsenic, antioxidant activity, nuclear factor erythroid-2 related factor 2 (Nrf2)

中图分类号: