中国组织工程研究 ›› 2019, Vol. 23 ›› Issue (25): 4062-4067.doi: 10.3969/j.issn.2095-4344.1777

• 干细胞基础实验 basic experiments of stem cells • 上一篇    下一篇

知母皂甙B-Ⅱ可减少氧-糖剥夺脊髓前角运动神经元瘤细胞的程序性坏死

高俊彦1,曹燕飞2,张  芸3,刘学敏1,侯燕红1,李建斌1,武志兵1
  

  1. 长治医学院,1人体解剖学教研室,2生物化学教研室,山西省长治市  046000;3长治医学院附属和平医院,山西省长治市  046000
  • 修回日期:2019-03-28 出版日期:2019-09-08 发布日期:2019-09-08
  • 通讯作者: 武志兵,教授,长治医学院人体解剖学教研室,山西省长治市 046000
  • 作者简介:高俊彦,男,1979年生,山西省阳泉市人,汉族,2012年中南大学基础医学院毕业,硕士,讲师,主要从事神经细胞损伤与再生修复方面的研究。 并列第一作者:曹燕飞,女,1975年生,山西省原平市人,汉族,2004年中南大学毕业,硕士,副教授,主要从事肿瘤细胞分子免疫机制方面的研究。
  • 基金资助:

    2016年度山西省高等学校科技创新项目(2016175),项目负责人:张芸;长治医学院校级创新团队支持项目(CX201414),项目负责人:曹燕飞 

Timosaponin B-II reduces necroptosis of VSC4.1 cells induced by oxygen-glucose deprivation 

Gao Junyan1, Cao Yanfei2, Zhang Yun3, Liu Xuemin1, Hou Yanhong1, Li Jianbin1, Wu Zhibing1
  

  1. 1Department of Anatomy, 2Department of Biochemistry, Changzhi Medical College, Changzhi 046000, Shanxi Province, China; 3Heping Hospital of Changzhi Medical College, Changzhi 046000, Shanxi Province, China
  • Revised:2019-03-28 Online:2019-09-08 Published:2019-09-08
  • Contact: Wu Zhibing, Professor, Department of Anatomy, Changzhi Medical College, Changzhi 046000, Shanxi Province, China
  • About author:Gao Junyan, Master, Lecturer, Department of Anatomy, Changzhi Medical College, Changzhi 046000, Shanxi Province, China. Cao Yanfei, Master, Associate professor, Department of Biochemistry, Changzhi Medical College, Changzhi 046000, Shanxi Province, China. Gao Junyan and Cao Yanfei contributed equally to this work.
  • Supported by:

    the Scientific Innovation Project of Shanxi High Education in 2016, No. 2016175 (to ZY); the Innovation Team Supporting Project of Changzhi Medical College, No. CX201414 (to CYF)

摘要:

文章快速阅读:

文题释义:
程序性坏死:
神经元死亡是许多神经系统疾病发生发展过程中所不可避免的,传统认为细胞死亡有凋亡、自噬、坏死3种方式,近年来发现一种可调控的细胞坏死,被称为程序性坏死,这种坏死可被特定的小分子抑制剂Necrostatin-1(Nec-1)所阻断,且细胞中受体相互作用蛋白3含量会发生改变。前期对于程序性坏死的研究主要集中在非神经元中,近年来陆续发现在大脑皮质神经元、海马神经元等神经元中也发现细胞的程序性坏死,说明程序性坏死是一种广泛存在于各种细胞内的普遍坏死现象。
知母皂甙:知母为百合科植物知母的根茎,其主要活性成分为甾体皂甙,主要有知母皂甙A-Ⅰ、A-Ⅱ、A-Ⅲ、A-Ⅳ、B-Ⅰ、B-Ⅱ、C、D、E等亚型,现代研究发现知母皂甙在老年痴呆、改善记忆、清除氧自由基、抗氧化、抗炎、降低血糖等许多方面都有功效。

 

摘要
背景:
研究发现知母皂甙B-Ⅱ具有神经保护作用,可减少细胞的程序性坏死,但其作用机制尚不明了,有待深入研究。
目的:分析知母皂甙B-Ⅱ干预可减少氧-糖剥夺脊髓前角运动神经元瘤细胞VSC4.1程序性坏死的机制。
方法:①取生长状态良好的VSC4.1细胞,分6组培养:A组为正常对照;B组加入过氧化氢溶液干预24 h;C-F组分别加入1,10,100,1 000 μmol/L的知母皂甙B-Ⅱ溶液干预24 h,之后各组均加入过氧化氢溶液干预24 h;MTT法检测细胞存活率,选择细胞存活率最高组的药物浓度进行以下实验;②将VSC4.1细胞分3组培养:正常对照组常规培养;模型组厌氧低糖培养8 h后复氧高糖培养6或12 h;抑制剂组加入程序性坏死抑制剂Necrostatin-1干预24 h,厌氧低糖培养8 h后复氧高糖培养6或12 h。流式细胞仪检测复氧6 h后的坏死细胞数量;Western-blot检测复氧高糖培养6或12 h的受体相互作用蛋白3表达;③将VSC4.1细胞分3组培养:正常对照组常规培养;模型组厌氧低糖培养8 h后复氧高糖培养6 h;药物组加入100 μmol/L的知母皂甙B-Ⅱ溶液干预24 h,厌氧低糖培养8 h后复氧高糖培养6 h。流式细胞仪检测复氧6 h后的坏死细胞数量;Western-blot检测复氧6 h的受体相互作用蛋白3表达。
结果与结论:①MTT检测显示与B组比较,E组细胞存活率最高,所以后续实验选择100 μmol/L的知母皂甙B-Ⅱ;②模型组坏死细胞数多于正常对照组(P < 0.05),抑制剂组坏死细胞数少于模型组(P < 0.05);抑制剂组复氧高糖培养6,12 h的受体相互作用蛋白3表达高于正常对照组(P < 0.05),且复氧6 h的该蛋白表达最高;③模型组坏死细胞数与受体相互作用蛋白3表达均高于正常对照组(P < 0.05),药物组坏死细胞数与受体相互作用蛋白3表达均低于模型组(P < 0.05);④结果表明,知母皂甙B-Ⅱ可有效减少氧-糖剥夺脊髓前角运动神经元瘤细胞的程序性坏死,可能与降低受体相互作用蛋白3有关系。

中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程
ORCID: 0000-0001-8380-8600(高俊彦)

关键词: VSC4.1细胞, Necrostatin-1, 程序性坏死, 氧-糖剥夺, 细胞损伤, 受体相互作用蛋白3, 坏死体, 知母皂甙B-Ⅱ

Abstract:

BACKGROUND: Timosaponin B-II has neuroprotective effects and reduces necroptosis of cells, but its mechanism is still unknown and needs further study.
OBJECTIVE: To study the mechanism by which the extract of timosaponin B-II of Anemarrhena asphodeloides on necroptosis of VSC4.1 cells induced by oxygen-glucose deprivation. 
METHODS: Firstly, VSC4.1 cells in good growth condition were cultured in six groups: group A as normal control; group B with hydrogen peroxide solution for 24 hours; groups C-F with 1, 10, 100, 1 000 μmol/L timosaponin B-II solution for 24 hours, respectively, and then each group was cultured with hydrogen peroxide solution for another 24 hours. MTT assay was used to detect the cell survival rate, and the drug concentration of the group with the highest cell survival rate was selected for the following experiments. Secondly, VSC4.1 cells were cultured in three groups: routine culture in normal control group; anaerobic hypoglycemic culture for 8 hours followed by reoxygenation and hyperglycemic culture for 6 or 12 hours in model group; necrostatin-1, a necroptosis inhibitor, was added in inhibitor group for 24 hours, and anaerobic hypoglycemic culture for 8 hours followed by reoxygenation and hyperglycemic culture for 6 or 12 hours. Flow cytometry was used to detect the number of necrotic cells after 6 hours of reoxygenation, and western blot assay was used to detect the expression of receptor-interacting protein 3 after 6 or 12 hours of reoxygenation. Thirdly, VSC4.1 cells were cultured in three groups: routine culture in normal control group; anaerobic hypoglycemic culture for 8 hours followed by reoxygenation and hyperglycemic culture for 6 hours in model group; drug group was treated with 100 μmol/L timosaponin B-II solution for 24 hours, followed by anaerobic hypoglycemic culture for 8 hours and anaerobic hyperglycemic culture for 6 hours. Flow cytometry was used to detect the number of necrotic cells after 6 hours of reoxygenation and western blot assay was used to detect the expression of receptor-interacting protein 3 after 6 hours of reoxygenation.
RESULTS AND CONCLUSION: (1) The MTT assay showed that compared with group B, group E had the highest cell survival rate. Hence, 100 μmol/L timosaponin B-II was selected for subsequent experiments. (2) The number of necrotic cells in the model group was higher than that in the normal control group (P < 0.05), and the number of necrotic cells in the inhibitor group was lower than that in the model group (P < 0.05). After 6 and 12 hours of reoxygenation culture the expression of receptor-interacting protein 3 in the inhibitor group was higher than that in the normal control group (P < 0.05), and the highest expression was observed at 6 hours after reoxygenation (P < 0.05). (3) The number of necrotic cells and the expression of receptor-interacting protein 3 in the model group were higher than those in the normal control group (P < 0.05), and the number of necrotic cells and the expression of receptor-interacting protein 3 in the drug group were lower than those in the model group (P < 0.05). All these results indicate that timosaponin B-II can effectively reduce the necroptosis of VSC4.1 cells deprived of oxygen-glucose, which may be related to the reduction of receptor-interacting protein 3.

Key words: VSC4.1 cell, necrostatin-1, necroptosis, oxygen-glucose deprivation, cell damage, receptor-interacting protein 3, necrosome, timosaponin B-II

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