Nuclear factor erythroid 2-related factor 2 (NRF2) is a negative regulator of tissue plasminogen activator synthesis in cultured human vascular endothelial EA.hy926 cells

Blood coagulation and the fibrinolytic system contribute to vascular lesions. Fibrinolysis in normal circulating blood strongly depends on the balance between tissue-type plasminogen activator (t-PA) and plasminogen activator inhibitor-1 (PAI-1) secreted from vascular endothelial cells; however, the...

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Bibliographic Details
Published in:Journal of toxicological sciences 2020, Vol.45(4), pp.237-243
Main Authors: Takahashi, Tsutomu, Nakano, Tsuyoshi, Katoh, Go, Shinoda, Yo, Yamamoto, Chika, Yoshida, Eiko, Kaji, Toshiyuki, Fujiwara, Yasuyuki
Format: Article
Language:English
Subjects:
Blood circulation
Blood coagulation
Endothelial cells
Fibrin
Fibrinolysis
Gene expression
Human endothelial cell line EA.hy926
NRF2
Plasminogen activator
Plasminogen activator inhibitors
Signal transduction
siRNA
Sulforaphane
Synthesis
t-Plasminogen activator
Vascular
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Summary:Blood coagulation and the fibrinolytic system contribute to vascular lesions. Fibrinolysis in normal circulating blood strongly depends on the balance between tissue-type plasminogen activator (t-PA) and plasminogen activator inhibitor-1 (PAI-1) secreted from vascular endothelial cells; however, the mechanisms by which endothelial fibrinolysis is regulated remain to be fully understood. In the present study, human vascular endothelial EA.hy926 cells were transfected with small interfering RNA for nuclear factor erythroid 2-related factor 2 (NRF2) and the expression of t-PA and PAI-1 and fibrinolytic activity in the conditioned medium were examined. EA.hy926 cells were also treated with sulforaphane, an NRF2 activator, and fibrinolytic activity was examined to confirm the NRF2 signaling pathway’s effect. Enhanced fibrinolytic activity in the conditioned medium was observed in association with increased expression and secretion levels of t-PA in NRF2 knockdown EA.hy926 cells. However, sulforaphane inhibited fibrinolytic activity and t-PA synthesis in EA.hy926 cells without any cell damage. The expression level of PAI-1 did not change in either NRF2 knockdown or sulforaphane treated cells. These results suggest that transcription factor NRF2 may play a role in down-regulating endothelial t-PA synthesis and fibrinolytic activity.
ISSN:0388-1350
1880-3989
DOI:10.2131/jts.45.237