基础医学与临床 ›› 2020, Vol. 40 ›› Issue (3): 380-387.

• 研究论文 • 上一篇    下一篇

紫草素减轻低氧-复氧致大鼠心肌细胞系H9c2损伤

刘明*, 杨臣礼, 孟庆鑫   

  1. 甘肃省中医院 心胸外科, 甘肃 兰州 730000
  • 收稿日期:2019-04-29 修回日期:2019-10-09 出版日期:2020-03-05 发布日期:2020-03-02
  • 通讯作者: *851073263@qq.com

Shikonin attenuates hypoxia-reoxygenation-induced injury of cardiomyocyte cell line H9c2

LIU Ming*, YANG Chen-li, MENG Qing-xin   

  1. Department of Cardiac Surgery,Gansu Provincial Hospital of Traditional Chinese Medicine,Lanzhou 730000,China
  • Received:2019-04-29 Revised:2019-10-09 Online:2020-03-05 Published:2020-03-02
  • Contact: *851073263@qq.com

摘要: 目的 探索紫草素对低氧-复氧(H/R)损害的H9c2心肌细胞的保护作用。方法 将心肌细胞系H9c2分为对照组、H/R组、紫草素(0.1、1和10 μmol/L)干预组,每组3个平行孔;MTT法检测紫草素对H9c2细胞毒性;流式细胞计量术检测细胞凋亡和周期;DCFH-DA检测细胞活性氧水平;生化检测细胞中MDA、8-OHdG和GSH含量;qPCR检测细胞γ-GCS、HO-1和NQO1 mRNA表达;Western blot检测细胞中Bax、Bcl-2、caspase-3、cleaved caspase-3、Keap1和Nrf2蛋白表达;免疫荧光检测细胞Nrf2蛋白进核情况。结果 紫草素呈浓度-时间依赖性抑制H9c2细胞增殖(P<0.05);H/R诱导H9c2细胞凋亡、细胞周期阻滞及促进Bax及cleaved caspase-3蛋白表达,抑制Bcl-2蛋白表达(P<0.05),紫草素呈浓度依赖性抑制细胞凋亡、解除细胞周期阻滞及cleaved caspase-3和Bax蛋白表达,增加Bcl-2蛋白表达;紫草素可降低H/R所致活性氧水平、MDA及8-OHdG升高,增高H/R所致GSH含量以及γ-GCS、HO-1和NQO1 mRNA的表达下调,导致Nrf2蛋白的升高及Keap1下调,并促进Nrf2蛋白进核(P<0.05)。结论 紫草素减轻低氧-复氧致H9c2心肌细胞的损伤。

关键词: 紫草素, 氧化应激, 低氧-复氧

Abstract: Objective To explore the protective effect of shikonin on H9c2 cardiomyocytes damaged by hypoxia-reoxygenation(H/R). Methods H9c2 cells were divided into control group, H/R group, shikonin (0.1, 1 and 10 μmol/L) group, including 3 parallel wells in each group; MTT assay was used to detect the toxicity of shikonin on H9c2 cells; Apoptosis and cell cycle were detected by flow cytometry; DCFH-DA was used to detect the level of reactive oxygen species; biochemical detection of MDA and 8-OHdG in cells And GSH content; qPCR was used to detect the expression of γ-GCS, HO-1 and NQO1 mRNA; Western blot was used to detect the expression of Bax, Bcl-2, caspase-3, cleaved caspase-3, Keap1 and Nrf2 proteins; immunofluorescence was used to detect Nrf2 cells. Protein into the nuclear situation. Results Shikonin inhibited the proliferation of H9c2 cells in a concentration-time-dependent manner (P<0.05). H/R induced apoptosis of H9c2 cells, cell cycle arrest and promoted the expression of Bax and cleaved caspase-3 proteins, inhibited the expression of Bcl-2 protein (P<0.05). Shikonin inhibited apoptosis, relieved cell cycle arrest, and cleaved caspase-3 and Bax protein expression, and increased Bcl-2 protein expression in a concentration-time-dependent manner; Shikonin decreased the active oxygen, MDA and 8-OHdG induced by H/R, increased the GSH content induced by H/R and down-regulated the expression of γ-GCS, HO-1 and NQO1 mRNA, caused an increase in Nrf2 protein and down-regulation of Keap1, and promoted Nrf2 protein entry into the nucleus (P<0.05). Conclusions Shikonin attenuates myocardial cell injury induced by hypoxia-reoxygenation in H9c2 cells.

Key words: shikonin, oxidative stress, hypoxia-reoxygenation

中图分类号: