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西地那非对高糖培养施旺细胞保护作用的机制研究

2020-08-21黄欢捷王讯程一帆邓斌斌黄崇础张万里

中国现代医生 2020年18期
关键词:氧化应激

黄欢捷 王讯 程一帆 邓斌斌 黄崇础 张万里

[摘要] 目的 探討西地那非对高糖培养施旺细胞保护作用的研究。 方法 培养并纯化后的大鼠施旺细胞为研究对象,分为正常对照组、高糖组、渗透压对照组 、高糖加不同浓度西地那非组 。CCK-8法检测细胞活性,流式细胞术检测细胞活性氧(ROS),Tunnel法检测细胞凋亡率,Western blot 法检测细胞Nrf-2的表达。 结果 高糖组施旺细胞内Nrf-2蛋白表达降低[高糖组(0.33±0.04),正常对照组(1.00±0.05)],ROS水平增高[高糖组(50.61±6.75),正常对照组(23.44±4.18)],细胞凋亡率升高[高糖组(36.62±3.15),正常对照组(4.53±0.26)],细胞活性下降[高糖组(0.91±0.17),正常对照组(1.65±0.25)]。不同西地那非能上调高糖培养施旺细胞内Nrf-2 蛋白表达,降低细胞内ROS水平,抑制细胞凋亡,提高细胞活性。 结论 西地那非可能通过激活Nrf-2信号通路诱导抗氧化应激保护高糖环境下的施旺细胞。

[关键词] 高糖;西地那非;施旺细胞;氧化应激

[中图分类号] R587.2;R747.9          [文献标识码] A          [文章编号] 1673-9701(2020)18-0028-04

A study of the mechanism of sildenafil's protective effect on Schwann cells cultured in high glucose

HUANG Huanjie1   WANG Xun1   CHENG Yifan1   DENG Binbin1   HUANG Chongchu2   ZHANG Wanli1

1.Department of Neurology, Division Ⅰ, the First Affiliated Hospital of Wenzhou Medical University, Wenzhou   325015, China; 2.Wenzhou Medical University, Wenzhou   325015, China

[Abstract] Objective To investigate the study of sildenafil's protective effect on Schwann cells cultured in high glucose. Methods The cultured and purified Schwann cells of rats were taken as research subjects and divided into the normal control group, the high glucose group, the osmotic pressure control group and the high glucose plus different concentrations of sildenafil group. CCK-8 method was used to detect the cell activity, flow cytometric method was used to detect reactive oxygen species(ROS) of the cells, Tunnel method was used to detect the apoptosis rate of the cells, and Western blot method was used to detect the Nrf-2 expression of the cells. Results The protein expression of Nrf-2 in Schwann cells in the high glucose group decreased[(0.33±0.04) in the high glucose group, (1.00±0.05) in the normal control group], the ROS level increased [(50.61±6.75) in the high glucose group, (23.44±4.18) in the normal control group], the apoptosis rate of the cells increased [(36.62±3.15) in the high glucose group, (4.53±0.26) in the normal control group], and the cell activity decreased [(0.91±0.17) in the high glucose group, (1.65±0.25) in the normal control group]. Different concentrations of sildenafil could upregulate the protein expression of Nrf-2 in the cells, reduce the ROS level in the cells, inhibit the cell apoptosis and improve the cell activity on Schwann cells cultured in high glucose. Conclusion Sildenafil may protect Schwann cells in high glucose environment by activating Nrf-2 signaling pathway to induce antioxidant stress.

[Key words] High glucose; Sildenafil; Schwann cell; Oxidative stress(OS)

糖尿病周围神经病变(DPN)是糖尿病发生率最高的并发症。在病史大于20年的糖尿病患者中,DPN发生率超过50%[1,2],DPN可出現躯体感觉障碍和下肢溃疡,严重者可导致患者下肢截肢,这不仅影响患者的日常生活,同时也给家庭、社会和国家带来沉重的经济负担[3]。DPN的病因发病机制尚不清楚,目前治疗DPN的常规药物只能延缓 DPN 的发生和发展,不能有效地治疗或逆转已经发生的 DPN[4,5]。因此,探索DPN机制及防治方法对提高患者存活率和改善其生活质量具有重要的临床实践意义。近年来提出的DPN统一机制学说表明高糖可引起线粒体中活性氧自由基(ROS)生成过多,进而导致氧化应激,从而最终导致周围神经病变[6]。……

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