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Postprandial hypertriglyceridemia impairs endothelial function by enhanced oxidant stress
1Department of Internal Medicine, Division of Cardiology, College of Medicine, Konyang University, 685 Gasoowon-dong, Seo-gu, Taejon, South Korea. jhbae@kyuh.co.kr
Atherosclerosis
|March 20, 2001
Summary
Acute hypertriglyceridemia (HTG) impairs endothelial function and increases oxidative stress, potentially contributing to atherosclerosis development. This effect was observed after a high-fat meal but not a low-fat meal.
Area of Science:
- Cardiovascular Science
- Metabolic Research
- Vascular Biology
Background:
- Hypertriglyceridemia (HTG) is increasingly recognized as a risk factor for atherosclerosis.
- Endothelial dysfunction and oxidative stress are key mechanisms in atherosclerosis pathogenesis.
Purpose of the Study:
- To investigate the acute effects of hypertriglyceridemia on endothelial function.
- To examine the role of oxidative stress in acute hypertriglyceridemia-induced endothelial dysfunction.
Main Methods:
- Participants consumed either a high-fat or low-fat meal.
- Serum triglyceride levels, leukocyte oxidative activity (PMA-activated O(2)(-)* production), and flow-mediated dilation (FMD) of the brachial artery were measured.
- Correlations between changes in triglycerides, oxidative stress, and FMD were analyzed.
Main Results:
- A high-fat meal significantly increased serum triglycerides and leukocyte oxidative activity, while decreasing FMD.
- No significant changes in these parameters were observed after a low-fat meal.
- Serum triglyceride increases were positively correlated with oxidative stress and negatively correlated with FMD.
Conclusions:
- Acute hypertriglyceridemia induces endothelial dysfunction through enhanced oxidative stress.
- These findings suggest a mechanism linking acute HTG to the development of atherosclerosis under chronic conditions.