中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (23): 3628-3634.doi: 10.12307/2023.198

• 血管组织构建 vascular tissue construction • 上一篇    下一篇

当归甙调控FOXO1干预高血压模型大鼠的血管内皮功能障碍

张希倩1,谭高峰1,孙晓泽1,庞  欣2,韩  宇3   

  1. 河南省中医院,1老年病科,2肾病科,3消化内科,河南省郑州市  450000
  • 收稿日期:2022-01-19 接受日期:2022-06-13 出版日期:2023-08-18 发布日期:2023-01-14
  • 通讯作者: 韩宇,硕士,主治医师,河南省中医院消化内科,河南省郑州市 450000
  • 作者简介:张希倩,女,1988年生,河南省郑州市人,汉族,2015年河南中医学院毕业,硕士,主治医师,主要从事老年病的科研与临床研究。
  • 基金资助:
    河南省中医药科学研究专项(20-21ZY2015),项目负责人:韩宇

Sweroside intervenes with vascular endothelial dysfunction in hypertensive rats by regulating FOXO1 expression

Zhang Xiqian1, Tan Gaofeng1, Sun Xiaoze1, Pang Xin2, Han Yu3   

  1. 1Department of Geriatrics, 2Department of Nephrology, 3Department of Gastroenterology, Henan Provincial Hospital of Traditional Chinese Medicine, Zhengzhou 450000, Henan Province, China
  • Received:2022-01-19 Accepted:2022-06-13 Online:2023-08-18 Published:2023-01-14
  • Contact: Han Yu, Master, Attending physician, Department of Gastroenterology, Henan Provincial Hospital of Traditional Chinese Medicine, Zhengzhou 450000, Henan Province, China
  • About author:Zhang Xiqian, Master, Attending physician, Department of Geriatrics, Henan Provincial Hospital of Traditional Chinese Medicine, Zhengzhou 450000, Henan Province, China
  • Supported by:
    Henan Provincial Traditional Chinese Medicine Research Project, No. 20-21ZY2015 (to HY)

摘要:

文题释义:

肾动脉缩窄高血压模型:在该模型中,通过用银夹夹住一条肾动脉,可在大鼠中观察到类似于肾血管性高血压的持续全身升压效应。肾血流量的减少可引起肾素-血管紧张素系统过度激活,随后血浆肾素活性和循环血管紧张素Ⅱ水平显著增加,血管壁中活性氧大量累积,导致血压立即升高。
氧化应激:被认为是活性氧形成与细胞抗氧化能力之间的失衡,是活性氧生成增强和/或抗氧化系统功能障碍的结果。生理上,活性氧作为信号分子,通过高度调节的氧化还原敏感信号转导影响细胞功能。在高血压中,氧化应激促进蛋白质的翻译后修饰和异常信号传导,导致细胞和组织损伤。

背景:当归甙可调控细胞氧化应激水平,但其在高血压诱导的内皮细胞氧化损伤中的作用尚不清楚。
目的:探讨当归甙是否通过调控叉头框转录因子O1(Forkhead box O1,FOXO1)表达调控高血压诱导的血管内皮功能障碍。
方法:①体内使用肾主动脉缩窄法建立高血压大鼠模型,40只雄性SD大鼠随机分为4组:假手术组;高血压组;高血压+ 25 mg/kg当归甙组;高血压+ 50 mg/kg当归甙组。采用TUNEL染色检测大鼠胸主动脉内皮细胞凋亡情况。②体外利用50 μmol/L H2O2刺激人脐静脉血管内皮细胞建立细胞氧化损伤模型,分为:对照组;H2O2组;H2O2 + 当归甙组(10,20,40 μmol/L当归甙);H2O2+Vector(阴性对照载体)组;H2O2+pcDNA-FOXO1组;H2O2+当归甙(40 μmol/L)+Scramble(阴性对照载体)组;H2O2+当归甙(40 μmol/L)+si-FOXO1组。采用MTT和流式细胞术检测细胞增殖和凋亡情况;采用ELISA检测血清和人脐静脉血管内皮细胞中血管紧张素Ⅱ、丙二醛和一氧化氮水平,以及胸主动脉组织和人脐静脉血管内皮细胞中血管细胞黏附分子1、细胞间黏附分子1和E-选择素水平;采用RT-qPCR和Western blot检测胸主动脉组织和人脐静脉血管内皮细胞中FOXO1 mRNA和蛋白表达。
结果与结论:①在体内,与假手术组比较,高血压模型大鼠血压和细胞凋亡水平明显升高(P < 0.05),FOXO1 mRNA和蛋白水平明显降低
(P < 0.05),血管紧张素Ⅱ、丙二醛、血管细胞黏附分子1、细胞间黏附分子1和E-选择素水平明显升高(P < 0.05),一氧化氮水平明显降低(P < 0.05)。当归甙以剂量依赖方式改善高血压大鼠血管功能障碍。②在体外,与对照组比较,H2O2组细胞增殖、FOXO1表达水平、一氧化氮水平明显降低(P < 0.05),细胞凋亡及丙二醛、血管细胞黏附分子1、细胞间黏附分子1和E-选择素水平明显升高(P < 0.05)。当归甙或FOXO1过表达可改善H2O2诱导的人脐静脉血管内皮细胞功能障碍;FOXO1干扰可逆转当归甙的作用。③结论:当归甙通过促进FOXO1表达改善高血压大鼠血管内皮功能障碍。

https://orcid.org/0000-0002-4307-2149(张希倩)

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松;组织工程

关键词: 当归甙, FOXO1, 高血压, 氧化应激, 内皮细胞功能障碍

Abstract: BACKGROUND: Sweroside can regulate cellular oxidative stress, but its role in hypertension-induced oxidative damage of endothelial cells remains unclear.
OBJECTIVE: To investigate whether sweroside regulates hypertension-induced vascular endothelial dysfunction by regulating Forkhead box O1 (FOXO1) expression. 
METHODS: (1) In vivo: The renal aorta constriction method was used to establish a hypertensive rat model. Forty male Sprague-Dawley rats were randomly divided into four groups: sham group, hypertension group, hypertension+25 mg/kg sweroside group, and hypertension+50 mg/kg sweroside group. TUNEL staining was used to detect the apoptosis of rat thoracic aorta endothelial cells. (2) In vitro: 50 μmol/L H2O2 was used to stimulate human umbilical vein endothelial cells to establish a cell oxidative damage model. Damaged cells were divided into control group, H2O2 group, H2O2+10, 20, or 40 μmol/L sweroside groups, H2O2+Vector group (negative control), H2O2+pcDNA-FOXO1 group, H2O2+40 μmol/L sweroside+Scramble group (negative control), and H2O2+40 μmol/L 
sweroside+si-FOXO1 group. MTT and flow cytometry were used to detect cell proliferation and apoptosis, respectively. ELISA was used to detect the levels of angiotensin II, malondialdehyde, and nitric oxide levels in rat serum and human umbilical vein endothelial cells, as well as vascular cell adhesion molecule 1, intercellular adhesion molecule 1, and E-selection levels in rat thoracic aorta tissues and human umbilical vein endothelial cells. RT-qPCR and western blot were used to detect the mRNA and protein expression of FOXO1 in rat thoracic aorta tissues and human umbilical vein endothelial cells. 
RESULTS AND CONCLUSION: (1) In vivo: compared with the sham group, blood pressure and apoptosis were significantly increased (P < 0.05), the expression levels of FOXO1 mRNA and protein were significantly reduced (P < 0.05), the contents of angiotensin II, malondialdehyde, vascular cell adhesion molecule 1, intercellular adhesion molecule 1, and E-selectin were significantly increased (P < 0.05), and the content of nitric oxide was significantly reduced (P < 0.05) in hypertensive rats. Sweroside could improve vascular dysfunction in hypertensive rats in a dose-dependent manner. (2) In vitro: compared with the control group, cell proliferation, FOXO1 expression and nitric oxide content were significantly reduced (P < 0.05), and cell apoptosis and malondialdehyde, vascular cell adhesion molecule 1, intercellular adhesion molecule 1, and E-selection contents were significantly increased (P < 0.05) in the H2O2 group. Sweroside treatment or FOXO1 overexpression could improve the dysfunction of human umbilical vein endothelial cells induced by H2O2, and the interference of FOXO1 could reverse the effect of sweroside. To conclude, sweroside can improve vascular endothelial dysfunction in hypertensive rats by promoting FOXO1 expression. 

Key words: sweroside, FOXO1, hypertension, oxidative stress, vascular endothelial dysfunction

中图分类号: