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Oszajca K, Bieniasz M, Brown G, Swiatkowska M, Bartkowiak J, Szemraj J. Effect of oxidative stress on the expression of t-PA, u-PA, u-PAR, and PAI-1 in endothelial cells. Biochem Cell Biol 2008; 86:477-86. [DOI: 10.1139/o08-137] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
In this study we examined the effects of exogenous nitric oxide (sodium nitroprusside, SNP) and hydrogen peroxide (H2O2) on the expression level of tissue-type plasminogen activator (t-PA), urokinase-type plasminogen activator (u-PA), urokinase-type plasminogen activator receptor (u-PAR), and plasminogen activator inhibitor type 1 (PAI-1) in human umbilical vein endothelial cells (HUVEC). The expression of selected genes involved in fibrynolysis under the influence of oxidative stress was analyzed at the levels of mRNA, protein, and promoter activity. The results of the conducted studies revealed that oxidative stress in endothelial cells causes a significant increase in PAI-1 and u-PAR expression and a moderate increase in t-PA and u-PA expression at all of the investigated levels. We attempted to elucidate the molecular signaling mechanisms by which SNP and H2O2 regulate expression of the respective fibrinolytic factors. Therefore, we tested the protein levels of AP-1, NF-κB, and HIF-1 and their DNA-binding activity in endothelial cells subjected to oxidative stress. We found strong correlation between AP-1, NF-κB, and HIF-1 in the contribution of regulation of selected genes. In addition, we also found that the inhibition of PAI-1 synthesis by antisense oligonucleotide to PAI-1 mRNA results in markedly increased u-PAR expression and that NF-κB and AP-1 are involved in this regulation.
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Affiliation(s)
- Katarzyna Oszajca
- Department of Medical Biochemistry, Medical University of Lodz, 6/8 Mazowiecka Street, 92-215 Lodz, Poland
- Department of Molecular and Medical Biophysics, Medical University of Lodz, 6/8 Mazowiecka Street, 92-215 Lodz, Poland
| | - Magdalena Bieniasz
- Department of Medical Biochemistry, Medical University of Lodz, 6/8 Mazowiecka Street, 92-215 Lodz, Poland
- Department of Molecular and Medical Biophysics, Medical University of Lodz, 6/8 Mazowiecka Street, 92-215 Lodz, Poland
| | - George Brown
- Department of Medical Biochemistry, Medical University of Lodz, 6/8 Mazowiecka Street, 92-215 Lodz, Poland
- Department of Molecular and Medical Biophysics, Medical University of Lodz, 6/8 Mazowiecka Street, 92-215 Lodz, Poland
| | - Maria Swiatkowska
- Department of Medical Biochemistry, Medical University of Lodz, 6/8 Mazowiecka Street, 92-215 Lodz, Poland
- Department of Molecular and Medical Biophysics, Medical University of Lodz, 6/8 Mazowiecka Street, 92-215 Lodz, Poland
| | - Jacek Bartkowiak
- Department of Medical Biochemistry, Medical University of Lodz, 6/8 Mazowiecka Street, 92-215 Lodz, Poland
- Department of Molecular and Medical Biophysics, Medical University of Lodz, 6/8 Mazowiecka Street, 92-215 Lodz, Poland
| | - Janusz Szemraj
- Department of Medical Biochemistry, Medical University of Lodz, 6/8 Mazowiecka Street, 92-215 Lodz, Poland
- Department of Molecular and Medical Biophysics, Medical University of Lodz, 6/8 Mazowiecka Street, 92-215 Lodz, Poland
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