Chinese Journal of Tissue Engineering Research ›› 2023, Vol. 27 ›› Issue (26): 4161-4167.doi: 10.12307/2023.121

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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 Accepted:2022-05-13 Online:2023-09-18 Published:2023-01-28
  • 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)

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, but 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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