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黄诺玛苷对高糖诱导HUVEC细胞氧化应激及VEGF和ICAM—1蛋白表达的影响

2018-06-13王丽丽李琳琳张楠楠王烨骆新陶义存毛新民

中国医药导报 2018年10期
关键词:氧化应激

王丽丽 李琳琳 张楠楠 王烨 骆新 陶义存 毛新民

[摘要] 目的 觀察两色金鸡菊黄酮类化合物黄诺玛苷对高糖诱导的人脐静脉内皮细胞(HUVEC)氧化应激及血管内皮生长因子(VEGF)和细胞间黏附分子-1(ICAM-1)蛋白表达的影响。 方法 将HUVEC细胞分为正常对照组(NG)、高糖模型组(HG)及不同浓度黄诺玛苷组(50、100、200、400 μmol/L)。酶联免疫吸附测定法(ELASA)检测细胞上清液中丙二醛(MDA)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GSH-Px)的活性。用Western blot方法检测细胞中VEGF和ICAM-1蛋白表达水平。 结果 与NG组比较,HG组MDA明显升高,SOD、CAT、GSH-Px明显降低(P < 0.05或P < 0.01)。与HG组比较,黄诺玛苷干预后,MDA含量显著降低(P < 0.05),SOD、CAT、GSH-Px活力显著上升(P < 0.05)。Western blot结果显示,与NG组比较,HG组VEGF和ICAM-1蛋白表达量增多(P < 0.05或P < 0.01)。与HG组比较,黄诺玛苷干预后VEGF和ICAM-1蛋白表达量随浓度递增而依次减少(P < 0.05或P < 0.01)。 结论 黄诺玛苷可能通过改善氧化应激水平和下调VEGF、ICAM-1的表达对高糖诱导HUVEC损伤具有一定保护作用。

[关键词] 黄诺玛苷;人脐静脉内皮细胞;氧化应激;血管内皮生长因子;细胞间黏附分子-1

[中图分类号] R96 [文献标识码] A [文章编号] 1673-7210(2018)04(a)-0008-05

[Abstract] Objective To observe the effects of flavanomarein glycosides of Coreopsis tinctoria Nutt. on oxidative stress and expression of vascular endothelial growth factor (VEGF) and intercellular cell adhesion molecule-1 (ICAM-1) protein in human umbilical vein endothelial cells (HUVEC) induced by high glucose. Methods The cultured HUVEC cells were divided into normal control group (NG group), high glucose model group (HG group) and different concentrations of flavanomarein group (50, 100, 200, 400 μmol/L). The activity of malondialdehyde (MDA), superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) in supernatant were detected by enzyme-linked immunosorbent assay (ELASA). The expression levels of VEGF and ICAM-1 protein in cells were detected by Western blot method. Results Compared with NG group, the content of MDA in HG group was significantly increased, the levels of SOD, CAT and GSH-Px in HG group were significantly decreased (P < 0.05 or P < 0.01). Compared with HG group, after flavanomarein intervention, the content of MDA in HG group was significantly decreased, CAT, GSH-Px activity increased significantly (P < 0.05). The results of Western blot showed that compared with NG group, the expression of VEGF and ICAM-1 protein in HG group increased (P < 0.05 or P < 0.01). Compared with HG group, after flavanomarein intervention, the expression of VEGF and ICAM-1 protein increased with the increase of concentration followed by reduction (P < 0.05 or P < 0.01). Conclusion Flavanomarein has a protective effect on HUVEC induced by high glucose may be through improving the level of oxidative stress and decreasing the levels of VEGF and ICAM-1.

[Key words] Flavanomarein glycosides; Human umbilical vein endothelial cells; Oxidative stress; Vascular endothelial growth factor; Intercellular cell adhesion molecule-1

糖尿病视网膜病变(diabetic retinopathy,DR)是微血管并发症之一,可造成不可逆转的视力丧失,其发病机制复杂[1]。氧化应激(OS)与DR的发生发展存在关联性。高血糖会在一定程度上导致体内的氧化应激反应,而氧化应激通过对内皮细胞及线粒体的损害,造成代谢通路异常,加重炎性反应[2]。研究表明,血管内皮生长因子(VEGF)和细胞间黏附分子1(ICAM-1)与DR的发生、发展密切相关,其介导的新生血管生成及炎性反应在DR的发生发展中起重要作用,抑制血管内皮细胞VEGF和ICAM-1失衡是DR防治的重要靶方向[3]。两色金鸡菊Coreopsis tinctoria Nutt.具有清热、活血健脾的功效[4]。本课题组前期研究发现,其提取物对实验动物血糖、血脂、血压异常均有一定影响,并显著降低糖尿病大鼠视网膜相关炎症因子的表达,黄诺玛苷为其重要的活性成分之一[5-11]。本研究通过观察黄诺玛苷对高糖诱导损伤的人脐静脉内皮细胞(HUVEC)的氧化应激指标及VEGF和ICAM-1表达的影响,探讨其对HUVEC的保护作用,为黄诺玛苷治疗DR提供理论依据。……

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