中国组织工程研究 ›› 2023, Vol. 27 ›› Issue (在线): 1-7.

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亚砷酸钠对人脐静脉内皮细胞损伤及鞘氨醇激酶1/1-磷酸鞘氨醇信号轴的影响

方兴艳1,田侦丽1,赵哲仪2,文  平3,谢婷婷1   

  1. 1贵州医科大学附属医院临床检验中心,贵州医科大学医学检验学院,贵州省贵阳市  550004;2四川省疾病预防控制中心,四川省成都市  614000;3贵州医科大学附属医院妇产科,贵州省贵阳市  550004
  • 收稿日期:2022-03-14 修回日期:2022-05-13 出版日期:2023-01-08 发布日期:2022-05-30
  • 通讯作者: 谢婷婷,博士,副教授,硕士生导师,贵州医科大学附属医院临床检验中心,贵州医科大学医学检验学院,贵州省贵阳市 550004
  • 作者简介:方兴艳,女,1991年生,贵州省遵义市人,汉族,贵州医科大学在读硕士,主要从事砷中毒机制研究
  • 基金资助:
    国家自然科学基金项目(81560514),项目负责人:谢婷婷

Effects of sodium arsenite on human umbilical vein endothelial cell injury and sphingosine kinases 1/sphingosine 1-phosphate signaling axis

Fang Xingyan1, Tian Zhenli1, Zhao Zheyi2, Wen Ping3, Xie Tingting1   

  1. 1Center for Clinical Laboratory, the Affiliated Hospital of Guizhou Medical University; School of Clinical Laboratory Science, Guizhou Medical University, Guiyang 550004, Guizhou Province, China; 2Sichuan Center for Disease Control and Prevention, Chengdu 614000, Sichuan Province, China; 3Department of Obstetrics and Gynecology, the Affiliated Hospital of Guizhou Medical University, Guiyang 550004, Guizhou Province, China
  • Received:2022-03-14 Revised:2022-05-13 Online:2023-01-08 Published:2022-05-30
  • Contact: Xie Tingting, MD, Associate professor, Master’s supervisor, Center for Clinical Laboratory, the Affiliated Hospital of Guizhou Medical University; School of Clinical Laboratory Science, Guizhou Medical University, Guiyang 550004, Guizhou Province, China
  • About author:Fang Xingyan, Master candidate, Center for Clinical Laboratory, the Affiliated Hospital of Guizhou Medical University; School of Clinical Laboratory Science, Guizhou Medical University, Guiyang 550004, Guizhou Province, China
  • Supported by:
    the National Natural Science Foundation of China, No. 81560514 (to XTT)

摘要:

文题释义:

亚砷酸钠:砷(Arsenic,As)为一种有毒类金属元素。亚砷酸钠为砷的化合物,已被广泛用于砷相关的毒性研究。
1-磷酸鞘氨醇( sphingosine 1-phosphate,S1P) :一种生物活性脂质,由鞘氨醇激酶(sphingosine kinases,SPHK)磷酸化鞘氨醇而成,分泌至胞外与膜表面1-磷酸鞘氨醇受体( sphingosine 1-phosphate receptors,S1PRs) 结合或在胞内作为第二信使调节细胞增殖、凋亡、迁移、黏附、血管生成及血管屏障等,已成为肿瘤、炎症、动脉粥样硬化等多种疾病研究的热点之一。

摘要
背景:血管内皮细胞是砷毒作用的关键靶点,砷致内皮细胞损伤的分子机制有待进一步研究。
目的:研究亚砷酸钠对人脐静脉内皮细胞的损伤及鞘氨醇激酶1/1-磷酸鞘氨醇(SPHK1/S1P)信号轴的影响。
方法:分离培养并鉴定人脐静脉内皮细胞,将人脐静脉内皮细胞暴露于含0,5,10,15,20,25 µmol/L亚砷酸钠的培养液 24 h,CCK-8法检测细胞存活率;倒置显微镜观察细胞形态;荧光探针DCFH-DA染色检测细胞内活性氧含量;Annexin V-FITC/PI双标记结合流式细胞术及TUNEL法检测细胞凋亡;ELISA检测细胞内1-磷酸鞘氨醇含量;实时荧光定量 PCR、Western blot 分别检测血管细胞黏附分子1、鞘氨醇激酶1、1-磷酸鞘氨醇受体1的mRNA和蛋白表达。
结果与结论:①与对照组(0 µmol/L亚砷酸钠)相比,随着亚砷酸钠浓度的增加:细胞存活率逐渐降低,且呈剂量-效应关系;细胞融合率逐渐降低,细胞间隙逐渐增宽,脱落漂浮的细胞逐渐增多;细胞内活性氧含量逐渐升高;细胞凋亡率逐渐升高;细胞内1-磷酸鞘氨醇含量逐渐升高;血管细胞黏附分子1、鞘氨醇激酶1 mRNA和蛋白的相对表达量逐渐升高,1-磷酸鞘氨醇受体1 mRNA和蛋白相对表达量逐渐降低。②结果提示,亚砷酸钠诱导的人脐静脉内皮细胞损伤可能与SPHK1/S1P信号轴激活、1-磷酸鞘氨醇受体1下调有关。SPHK1/S1P信号轴可能成为砷致心血管损伤的新靶点

关键词: 亚砷酸钠, 人脐静脉内皮细胞, 氧化应激, 凋亡, 炎症, 鞘氨醇激酶1/1-磷酸鞘氨醇信号轴

Abstract: BACKGROUND: Vascular endothelial cells are the main target of arsenic toxicity and the molecular mechanism of arsenic-induced endothelial cell injury needs to be further studied.
OBJECTIVE: To study the effects of sodium arsenite on human umbilical vein endothelial cell injury and sphingosine kinase 1/sphingosine 1-phosphate signaling axis of human umbilical vein endothelial cells.
METHODS: Human umbilical vein endothelial cells were isolated, cultured, and identified. The cells were treated with 0, 5, 10, 15, 20, 25 µmol/L sodium arsenite for 24 hours. Cell viability was detected by cell counting kit-8. Cell morphology was observed by inverted phase contrast microscope. The content of intracellular reactive oxygen species was detected by fluorescent probe DCFH-DA. Annexin V-FITC/PI double labeling combined with flow cytometry and TUNEL were used to detect apoptosis. The content of sphingosine 1-phosphate in cells was detected by ELISA. The mRNA and protein expressions of vascular cell adhesion molecule-1, sphingosine kinase 1, and sphingosine 1-phosphate were detected by real-time fluorescence quantitative PCR and western blot respectively. 
RESULTS AND CONCLUSION: Compared with the control group (0 µmol/L sodium arsenite), the cell viability decreased gradually along with the increased concentration of sodium arsenite in a dose-dependent manner; the cell fusion rate decreased gradually, the cell gap widened gradually, and the number of exfoliated and floating cells increased gradually; the reactive oxygen species content and apoptosis rate increased gradually; the sphingosine 1-phosphate content in cells increased gradually; the relative mRNA and protein expressions of vascular cell adhesion molecule-1 and sphingosine kinase 1 increased gradually, while the relative mRNA and protein expression of sphingosine kinase 1 decreased gradually. To conclude, sodium arsenite-injured human umbilical vein endothelial cell injury may be related to the activation of sphingosine kinase 1/sphingosine 1-phosphate signaling axis and the downregulation of sphingosine 1-phosphate receptor 1. Sphingosine kinase 1/sphingosine 1-phosphate signaling axis may become a new target of arsenic-induced cardiovascular injury.

Key words: sodium arsenite, human umbilical vein endothelial cell, oxidative stress, apoptosis, inflammation, sphingosine kinase 1/sphingosine 1-phosphate signaling axis

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