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[Study on the oxidative injury of the vascular endothelial cell affected by PM2.5]
Chen Dong1, Wei-min Song, Ye-wen Shi
1School of Public Health of Fudan University, Shanghai 200032, China.
Objective:
To study the mechanism of cardiovascular disease affected by PM2.5.
Methods:
ECV304 cells were exposed to PM2.5 of different concentration (50, 200 and 400 microg/ml), after 24h, the viability of cells by MTT, SOD and GSH contents in cells and apoptosis of cells determined by flow cytometer were measured.
Results:
Viability of ECV304 cells declined and mortality of ECV304 cells increased gradually with increase of concentration, GSH contents in cells (mg/g prot) were 20.643 +/- 2.167, 16.774 +/- 2.911 (P < 0.05), 15.658 +/- 3.471 (P < 0.01), and SOD contents in cells (U/mg prot) were 5.878 +/- 0.401, 5.140 +/- 0.448 (P < 0.01), 4.817 +/- 0.451 (P < 0.01) when the concentration of PM2.5 was 50, 200 and 400 microg/ml.
Conclusion:
PM2.5 can cause vascular endothelial cells to die by way of oxidative injury, then induce cardiovascular disease.
Insights
Exposure to fine particulate matter (PM2.5) damages vascular endothelial cells through oxidative stress, leading to increased mortality and potentially cardiovascular disease.
Area of Science:
- Environmental Health
- Toxicology
- Cardiovascular Science
Context:
- Cardiovascular diseases remain a leading cause of mortality worldwide.
- Air pollution, particularly fine particulate matter (PM2.5), is increasingly recognized as a significant environmental risk factor.
- The precise mechanisms by which PM2.5 affects cardiovascular health are still under investigation.
Purpose:
- To elucidate the cellular mechanisms through which PM2.5 exposure impacts cardiovascular health.
- To investigate the effects of varying PM2.5 concentrations on vascular endothelial cell viability, oxidative stress markers, and apoptosis.
Summary:
- Human umbilical vein endothelial cells (ECV304) were exposed to PM2.5 at concentrations of 50, 200, and 400 microg/ml.
- Results showed a dose-dependent decrease in cell viability and increased cell mortality with rising PM2.5 concentrations.
- Significant reductions in cellular glutathione (GSH) and superoxide dismutase (SOD) levels were observed, indicating increased oxidative stress and damage.
Impact:
- PM2.5 exposure induces oxidative injury in vascular endothelial cells, contributing to cell death.
- This cellular damage is a key mechanism linking PM2.5 air pollution to the development of cardiovascular disease.
- Findings highlight the urgent need for strategies to mitigate air pollution exposure for cardiovascular protection.
