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中国应用生理学杂志 ›› 2019, Vol. 35 ›› Issue (2): 130-134.doi: 10.12047/j.cjap.5719.2019.029

• 研究论文 • 上一篇    下一篇

高糖通过Nox4型NADPH氧化酶影响施旺细胞凋亡的机制研究*

于婷1,辛青1,许飞2,李雷3△   

  1. 1. 济宁医学院基础医学院生理学教研室, 山东 济宁 272067;
    2. 济宁市第一人民医院血管外科, 山东 济宁 272011;
    3. 济宁医学院附属医院神经内四科, 山东 济宁 272029
  • 出版日期:2019-03-28 发布日期:2019-06-27
  • 通讯作者: Tel: 18678746862; E-mail: iampolkers@163.com
  • 基金资助:
    济宁市科技助推新旧动能转换计划资助课题(2017SMNS004);济宁市科技发展计划项目(2014jnyx05);济宁医学院青年教师科研扶持基金(JY2016KJ023Y)

Research on the mechanism of high glucose affecting the apoptosis of schwann cells by Nox4 NADPH oxidase

YU Ting1 , XIN Qing1 , XU Fei2, LI Lei3△   

  1. 1. Department of Physiology, Jining Medical University, Jining 272067;
    2. Department of Vascular Surgery, Jining First People's Hospital, Jining 272011;
    3. Department of Neurology, Affiliated Hospital of Jining Medical University, Jining 272029, China
  • Online:2019-03-28 Published:2019-06-27

摘要: 目的: 探讨高糖通过Nox4型NADPH氧化酶影响施旺细胞凋亡的机制。方法: 提取Wistar大鼠新生鼠的施旺细胞体外培养。分为对照组、高糖组、NOX4 siRNA组及对照siRNA组(n=10)。采用WST-1法检测细胞活力,DCFH-DA法检测细胞内活性氧自由基(ROS)含量,荧光实时定量 RT-PCR检测Nox4和Caspase3 mRNA表达,蛋白印迹法检测Nox4和Caspase3蛋白表达。结果: 高糖培养上调施旺细胞Nox4 mRNA及蛋白表达,降低施旺细胞活性,增加细胞内ROS含量,通过增加Caspase3 mRNA及蛋白表达促进细胞凋亡。NOX4 siRNA通过抑制Nox4基因表达,阻止高糖培养的施旺细胞内ROS蓄积,降低高糖对施旺细胞的活性损害,通过下调Caspase3 mRNA及蛋白表达减少细胞凋亡。结论: Nox4参与高糖引起的施旺细胞凋亡,针对Nox4表达或功能的调控方式可能成为治疗糖尿病周围神经病变的新途径。

关键词: 糖尿病, 施旺细胞, NADPH氧化酶, 活性氧自由基, 凋亡

Abstract: Objective: To investigate the mechanism of high glucose affecting the apoptosis of schwann cells through Nox4 NADPH oxidase. Methods: The schwann cells of newborn Wistar rats were cultured in vitro. The cultured cells were divided into four groups: control group, high-glucose group, NOX4 siRNA group and control siRNA group (n=10). The WST-1 method was used to detect the cell vitality, and the DCFH-DA method was used to detect the contents of intracellular reactive oxygen free radicals (ROS). Nox4 and Caspase3 mRNA expressions were detected by real-time fluorescence quantitative RT-PCR. Nox4 and Caspase3 protein expressions were determined by Western blot. Results: High glucose culture up-regulated Nox4 mRNA and protein expressions of schwann cells, decreased activity of schwann cells, increased intracellular ROS content, and promoted apoptosis by increasing Caspase3 mRNA and protein expressions. NOX4 siRNA blocked the accumulation of ROS in the high glucose cultured schwann cells, and reduced the damage of glucose on cell viability, by inhibiting NOX4 gene expression. NOX4 siRNA also reduced cell apoptosis by down-regulating Caspase3 mRNA and protein expressions. Conclusion: Nox4 was involved in the hyperglycemic-induced apoptosis of schwann cells through ROS. The regulation of Nox4 expression or function might be a new way to treat diabetic peripheral neuropathy.

Key words: diabetes, schwann cells, NADPH oxidase, reactive oxygen free radicals, apoptosis

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